Escape ladder hook

Abstract

The utility model provides an escape ladder hook belongs to escape ladder technical field. Including two hooks, the adjusting assembly is installed between two hooks, the adjusting assembly includes two X shape cross arrangement connecting rods, the middle part of two connecting rods is hinged to each other through the hinge shaft, one end of connecting rod is the hinged end of hinge in one of hooks, the other end of connecting rod is the movable end of movable connection in another hook, adjusting assembly is used for preventing two hooks to continue to unfold and stabilizing the relative position of two hooks when two hooks unfold to the maximum interval. The utility model effectively eliminates the defect that the hinge connecting rod shakes under the dynamic load in the prior art, and the overall stability when the hook system unfolds is improved significantly.

Description

Technical Field

[0001] This utility model belongs to the field of escape ladder technology and relates to an escape ladder hook. Background Technology

[0002] Fire escape ladders are generally known to be either fixed or movable. Fixed fire escape ladders, such as those installed on the exterior of buildings, especially on the outer platforms of windows connecting different floors, allow people to climb out of the window and directly onto the ladder to escape in an emergency. However, because these ladders are fixed to the exterior of the building and cannot be folded or stored normally, they are exposed to the elements year-round, resulting in severe corrosion. Without regular inspection and maintenance, they may cause accidents due to disrepair in an emergency. Movable escape ladders effectively avoid this situation. When a fire breaks out in a building or other unforeseen emergencies occur, movable escape ladders can be used for evacuation.

[0003] Existing patent document CN208168786U discloses an escape ladder, including a hook and a ladder assembly. The hook comprises a connecting bend formed by bending a tube, an upper hook, and a lower hook. The connecting bend has an upper telescopic tube end and a lower telescopic tube end. The upper hook can cooperate with the upper telescopic tube end to move axially along the upper telescopic tube end. The upper telescopic tube end or the upper hook is provided with an upper limit stop portion, and the upper hook or the upper telescopic tube end has an upper mating portion corresponding to the upper limit stop portion. The upper limit stop portion and the upper mating portion... The upper hook can move only between the foldable position and the unfolded position; the lower hook can cooperate with the lower telescopic tube end to move the lower hook axially along the lower telescopic tube end. The lower telescopic tube end or the lower hook is provided with a lower limit part. The lower limit part and the lower cooperating part cooperate to make the lower hook move only between the foldable position and the unfolded position. Multiple hooks are connected by a connecting rod to improve the stability of the hook. The connecting rod includes a first connecting rod and a second connecting rod. The first connecting rod and the second connecting rod are hinged.

[0004] However, the aforementioned existing technologies still have the following shortcomings:

[0005] The V-shaped connecting rod used to connect multiple hooks adopts a hinge connection method, but lacks an effective rigid locking mechanism in the deployed state. This results in unnecessary rotational freedom of the connecting rod when under force, and the two hooks cannot remain parallel to each other after being deployed. This makes the connection between the two hooks unstable and prone to shaking under dynamic loads, ultimately significantly reducing the safety and reliability of the entire escape ladder device. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an escape ladder hook to solve the problems mentioned in the background technology. This utility model sets up an adjustment component so that when the two hooks are extended to the maximum distance, the two connecting rods are in a fully extended X-shaped state. At this time, the adjustment component prevents the two hooks from extending further and stabilizes the relative position of the two hooks, making the two hooks parallel, which significantly improves the overall stability of the hook system when it is extended.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0008] An escape ladder hook includes two hooks and an adjustment assembly installed between the two hooks. The adjustment assembly includes two connecting rods arranged in an X-shape, and the middle parts of the two connecting rods are hinged to each other by a hinge shaft.

[0009] One end of the connecting rod is a hinged end that is hinged to one of the hooks;

[0010] The other end of the connecting rod is a movable end that is movably connected to another hook.

[0011] The adjusting component is used to prevent the two hooks from extending further and to stabilize the relative position of the two hooks when they are extended to their maximum spacing.

[0012] Furthermore, the hook consists of a connecting bend, an upper hook, and a lower hook. The connecting bend is provided with a limiting part that cooperates with the movable end. The hinge end of the connecting rod is located near the upper hook of the connecting bend, and the limiting part is located near the lower hook of the connecting bend.

[0013] Furthermore, the limiting part is an adjustable bolt or screw that can adjust the gap between the connecting bend and the pipe.

[0014] Furthermore, the movable end of the connecting rod is provided with a through hole and a limiting hole that are connected to each other;

[0015] The limiting part can be inserted into the through hole and locked into the limiting hole;

[0016] When the two hooks are extended to their maximum spacing, the limiting part can move along the through hole and eventually lock into the limiting hole, achieving rigid locking.

[0017] Furthermore, the movable end of the connecting rod is provided with a guide hole extending along the length of the connecting rod;

[0018] The limiting part is slidably connected to the guide hole;

[0019] When the two hooks are unfolded, the limiting part moves within the guide hole;

[0020] When the two hooks are extended to their maximum spacing, the limiting part abuts against the end of the guide hole.

[0021] Furthermore, a pair of protrusions are symmetrically arranged on the inner side of the guide hole near the end.

[0022] Furthermore, the limiting part consists of a head and a rod, the diameter of the head is larger than the diameter of the rod, the diameter of the head is smaller than or equal to the through hole, and the diameter of the rod is directly smaller than or equal to the limiting hole.

[0023] Furthermore, the limiting part consists of a head and a rod, the diameter of the head is larger than the diameter of the rod, the diameter of the head is larger than the guide hole, and the diameter of the rod is smaller than or equal to the guide hole.

[0024] Furthermore, an annular rubber gasket is fixedly installed on the limiting part, and the rubber gasket is located between the head and the connecting rod.

[0025] The beneficial effects of this utility model are:

[0026] This invention includes an adjustment component consisting of two connecting rods hinged together at their midpoints in an X-shape. A connecting circular hole and a limiting hole at the movable end of each X-shaped connecting rod engage with a limiting part on the hook. The limiting part passes through the through hole and then engages in the limiting hole, achieving rigid mechanical locking when the hooks are extended to their maximum spacing. This ensures that the two hooks are parallel when fully extended, improving stability. This invention effectively eliminates the swaying defect of V-shaped hinge connecting rods under dynamic loads in existing technologies, significantly improving the overall stability of the hook system when extended.

[0027] This invention utilizes a guide hole at the movable end of an X-shaped cross link to engage with a limiting part on the hook. The limiting part slides along the guide hole, and when the hook is extended to the preset maximum distance, the limiting part automatically slides towards the end of the guide hole. The limiting part, through two protrusions, effectively prevents the limiting part from returning to its original position, achieving rigid locking. Compared to the connected circular hole and limiting hole at the movable end of an X-shaped cross link, the guide hole at the movable end of this X-shaped cross link, which engages with the limiting part, is suitable for scenarios requiring rapid deployment and fewer operational steps, making operation more convenient. Attached Figure Description

[0028] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0029] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention;

[0030] Figure 2 This is a schematic diagram of the connecting rod in Embodiment 1 of this utility model;

[0031] Figure 3This is Embodiment 1 of the present utility model. Figure 2 Enlarged view of point A in the middle;

[0032] Figure 4 This is Embodiment 1 of the present utility model. Figure 1 Enlarged view of point B in the middle;

[0033] Figure 5 This is a schematic diagram of the connecting rod structure in Embodiment 2 of this utility model;

[0034] Figure 6 This is Embodiment 2 of the present utility model. Figure 5 Enlarged view of point C in the middle;

[0035] Figure 7 This is an assembly cross-sectional view of the limiting part and the rubber gasket in Embodiment 1 of this utility model.

[0036] In the diagram, 1 is the hook; 2 is the connecting rod; 3 is the connecting bend; 4 is the upper hook; 5 is the lower hook; 6 is the limiting part; 7 is the guide hole; 8 is the through hole; 9 is the limiting hole; 10 is the protrusion; and 11 is the rubber pad. Detailed Implementation

[0037] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0038] Example 1

[0039] like Figure 1-4 As shown, an escape ladder hook includes two hooks 1, characterized in that: an adjustment assembly is installed between the two hooks 1, the adjustment assembly includes two connecting rods 2 arranged in an X-shape, the middle parts of the two connecting rods 2 are hinged to each other by a hinge shaft.

[0040] One end of the connecting rod 2 is a hinged end that is hinged to one of the hooks 1;

[0041] The other end of the connecting rod 2 is movably connected to the movable end of another hook 1;

[0042] The adjusting component is used to prevent the two hooks 1 from continuing to unfold when they are unfolded to their maximum spacing and to stabilize and fix the relative position of the two hooks 1.

[0043] like Figure 1-3 As shown in Figure 7, the hook 1 consists of a connecting bend 3, an upper hook 4, and a lower hook 5. The connecting bend 3 is provided with a limiting part 6 that cooperates with the movable end. The hinge end of the connecting rod 2 is located near the upper hook 4 of the connecting bend 3, and the limiting part 6 is located near the lower hook 5 of the connecting bend 3.

[0044] When the two hooks 1 are extended to their maximum spacing, the two connecting rods 2 are in a fully extended X-shaped state. At this time, the movable end of the connecting rod 2 interacts with the corresponding limiting part 6 to achieve rigid locking, prevent the two hooks 1 from continuing to extend and eliminate the degree of freedom of movement of the connecting rod 2 at this position, thereby stabilizing and fixing the relative position of the two hooks 1.

[0045] The movable end of the connecting rod 2 is provided with a through hole 8 and a limiting hole 9 that are connected to each other;

[0046] The limiting part 6 can be inserted into the through hole 8 and engaged in the limiting hole 9;

[0047] When the two hooks 1 are extended to their maximum spacing, the limiting part 6 can move along the through hole 8 and eventually lock into the limiting hole 9, thereby achieving the rigid locking.

[0048] The limiting part 6 is an adjustable bolt or screw that can connect to the bend 3. The limiting part 6 consists of a head and a rod. The diameter of the head is larger than the diameter of the rod, and the diameter of the head is smaller than or equal to the through hole 8. The diameter of the rod is smaller than or equal to the limiting hole 9. An annular rubber gasket 11 is fixedly installed on the limiting part 6. The rubber gasket 11 is located between the head and the connecting rod 2. The rubber gasket 11 is used to increase the friction between the limiting part 6 and the connecting rod 2, so that the connecting rod 2 is more stable and firm after locking. At the same time, the rubber gasket 11 can effectively reduce the wear on the surface of the connecting rod 2 and the surface of the head of the limiting part 6.

[0049] The specific operation method of Embodiment 1 of this utility model is as follows:

[0050] Initial state: Hook 1 is in a folded or semi-expanded state, and link 2 is in a retracted X shape.

[0051] Pull hook 1: Pull the two hooks 1 outward, the connecting rod 2 rotates around the hinge axis, and the X-shaped structure gradually unfolds.

[0052] At this time, the hinged end of connecting rod 2 rotates around the hinge point of the connecting bend, changing only the angle.

[0053] When the two hooks 1 are moved to the appropriate distance, one end of the limiting part 6 is aligned with the through hole 8 and inserted. The limiting part 6 passes through the through hole 8. At this time, the connecting rod 2 is located between the head of the limiting part 6 and the connecting bend 3. Continue to pull the two hooks 1 so that the limiting part 6 slides to the end of the through hole 8. When the two hooks 1 are extended to the preset maximum distance, the limiting part 6 is locked into the limiting hole 9 to complete the rigid locking.

[0054] Unlock: Control the two hooks 1 to move closer together, so that the limiting part 6 pushes out of the limiting hole 9 and enters the through hole 8, and disengages the second end of the connecting rod 2 from the limiting part 6, so that the limiting part 6 no longer penetrates the round hole 7, and can then retract.

[0055] In this embodiment of the invention, the circular holes 7 and limiting holes 9 at the movable ends of the two X-shaped intersecting connecting rods 2 cooperate with the limiting part 6 of the hook 1 to achieve rigid mechanical locking when the hook 1 is extended to the maximum distance, and semi-automatic locking is also achieved. When the two hooks 1 are extended to the maximum distance, the circular holes 7, limiting holes 9 and limiting part 6 interact with each other. There are no complex springs or electronic components, the failure rate is low, and it is especially suitable for extreme environments of escape equipment. Rigid locking can be completed with simple operation, and the operation efficiency is high. The adjustment component can effectively limit the maximum distance of the two hooks 1 when they are extended, preventing structural deformation or failure due to over-extension.

[0056] The core locking structure of this utility model embodiment 1 only requires machining specific hole types (through hole 8 and limiting hole 9) on the movable end of the connecting rod 2, and matching it with standard fasteners. No additional complex parts are needed, making it easy to mass-produce and cost controllable.

[0057] Example 2

[0058] like Figure 5 As shown, the movable end of the connecting rod 2 is provided with a guide hole 7 extending along the length direction of the connecting rod 2;

[0059] The limiting part 6 is slidably connected to the guide hole 7;

[0060] When the two hooks 1 are unfolded, the limiting part 6 moves within the guide hole 7;

[0061] When the two hooks 1 are extended to their maximum spacing, the limiting part 6 abuts against the end of the guide hole 7 to achieve rigid locking.

[0062] A pair of protrusions 10 are symmetrically arranged on the inner side of the guide hole 7 near the end.

[0063] The limiting part 6 consists of a head and a rod. The diameter of the head is greater than the diameter of the rod, and the diameter of the head is greater than the guide hole 7. The diameter of the rod is less than or equal to the guide hole 7.

[0064] The specific operation method of this embodiment two is as follows:

[0065] Simultaneously, the two hooks 1 are controlled to move away from each other, the connecting rod 2 rotates around the hinge axis, the X-shaped structure gradually unfolds, and the limiting part 6 slides in the guide hole 7. When the hook 1 unfolds to the preset maximum distance, the limiting part 6 automatically slides to the end of the guide hole 7. The limiting part 6 passes through two protrusions 10. Under the action of the protrusions 10, the limiting part 6 is effectively prevented from returning to its original position and is rigidly locked.

[0066] Unlock: Apply a certain force and push the hook 1 directly inward, so that the limiting part 6 passes between the two protrusions 10 and slides back along the guide hole 7.

[0067] Compared to Embodiment 1, Embodiment 2 is more suitable for scenarios requiring rapid deployment and fewer operational steps, making it more convenient to operate.

[0068] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An escape ladder hook, comprising two hooks (1), characterized in that: An adjustment assembly is installed between the two hooks (1), the adjustment assembly including two connecting rods (2) arranged in an X-shape, the middle parts of the two connecting rods (2) being hinged to each other by a hinge shaft; One end of the connecting rod (2) is a hinged end that is hinged to one of the hooks (1); The other end of the connecting rod (2) is a movable end that is movably connected to another hook (1); The adjustment component is used to prevent the two hooks (1) from continuing to unfold and to stabilize the relative position of the two hooks (1) when the two hooks (1) are unfolded to the maximum spacing.

2. The escape ladder hook according to claim 1, characterized in that, The hook (1) consists of a connecting bend (3), an upper hook (4) and a lower hook (5). The connecting bend (3) is provided with a limiting part (6) that cooperates with the movable end. The hinge end of the connecting rod (2) is located on the connecting bend (3) near the upper hook (4), and the limiting part (6) is located on the connecting bend (3) near the lower hook (5).

3. The escape ladder hook according to claim 2, characterized in that, The limiting part (6) is a bolt or screw that can adjust the gap between the connecting bend (3) and the limiting part (6).

4. The escape ladder hook according to claim 3, characterized in that, The movable end of the connecting rod (2) is provided with a through hole (8) and a limiting hole (9) that are connected to each other. The limiting part (6) can be inserted into the through hole (8) and locked into the limiting hole (9); When the two hooks (1) are extended to the maximum distance, the limiting part (6) can move along the through hole (8) and finally be locked into the limiting hole (9) to achieve rigid locking.

5. The escape ladder hook according to claim 3, characterized in that, The movable end of the connecting rod (2) is provided with a guide hole (7) extending along the length direction of the connecting rod (2); The limiting part (6) is slidably connected to the guide hole (7); When the two hooks (1) are unfolded, the limiting part (6) moves within the guide hole (7); When the two hooks (1) are extended to their maximum spacing, the limiting part (6) abuts against the end of the guide hole (7).

6. The escape ladder hook according to claim 5, characterized in that, A pair of protrusions (10) are symmetrically arranged on the inner side of the guide hole (7) near the end.

7. The escape ladder hook according to claim 4, characterized in that, The limiting part (6) consists of a head and a rod. The diameter of the head is greater than the diameter of the rod. The diameter of the head is less than or equal to the through hole (8). The diameter of the rod is directly less than or equal to the limiting hole (9).

8. The escape ladder hook according to claim 5, characterized in that, The limiting part (6) consists of a head and a rod. The diameter of the head is greater than the diameter of the rod. The diameter of the head is greater than the diameter of the guide hole (7). The diameter of the rod is less than or equal to the diameter of the guide hole (7).

9. An escape ladder hook according to claim 7 or 8, characterized in that, An annular rubber pad (11) is fixedly installed on the limiting part (6), and the rubber pad (11) is located between the head and the connecting rod (2).

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