Antiskid fire-fighting hook

Abstract

The utility model discloses an anti-skid fire-fighting hook, and relates to the technical field of fire-fighting equipment, and the scheme is that the anti-skid fire-fighting hook comprises a hook rod body, and a communication hole is formed in the side wall of the hook rod body; the hook head is assembled on the hook rod body, and the hook head is located on the edge of the communicating hole; the guide shaft is rotationally mounted in the hook rod body, and the guide shaft and the hook rod body are coaxially arranged; the guide block is assembled on the guide shaft, and the guide block can reciprocate in the extending direction of the guide shaft; the driving piece is provided with a guide inclined plane part and a transmission part, the guide inclined plane part can be matched with the guide block, and the transmission part is located in the communicating hole; and the hook head with a unique structure can be designed, so that a pre-tightening force is generated when the fire-fighting hook is in contact with a smooth tubular object, the gripping force is enhanced, the slipping phenomenon is effectively avoided, and the rescue efficiency and safety are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of fire protection equipment technology, specifically to an anti-slip fire hook. Background Technology

[0002] Fire hooks play a crucial role in fire rescue. In the event of a sudden fire, firefighters can use them to hook onto doors, windows, and metal frames, skillfully employing leverage to break through barriers and quickly create rescue routes, buying precious escape time for trapped individuals. In high-altitude rescue missions, fire hooks serve as temporary anchor points, providing stable support for firefighters to secure ropes and aiding their climb. In confined spaces, their hooks can precisely penetrate crevices, hooking onto clothing or even limbs of trapped individuals to facilitate rescue operations. At building collapse sites, fire hooks can also be used to temporarily secure rescue equipment, supporting the structure of collapsed buildings and creating safer conditions for rescue work. Due to their versatility, fire hooks have become an indispensable core tool in complex rescue scenarios.

[0003] A fire hook with authorization announcement number (CN220404653U) comprises a first branch rod, a second branch rod, and a connecting structure between the two. In actual firefighting operations, this fire hook has certain application capabilities. For example, in chemical fire scenarios, firefighters can use it to hook onto plastic pipes, thereby cutting off the source of flammable liquid or gas leaks and effectively curbing the spread of fire; in the post-fire cleanup phase of buildings, it can hook onto deformed metal ventilation pipes and move them aside, creating a passage for rescue personnel; during water rescues, it can hook onto floating plastic pipes, promptly clearing obstacles in the path of rescue vessels; and in rescues in confined spaces, it can hook onto metal pipes surrounding trapped individuals, safely transferring them. It plays a vital role in rescue operations that protect people's lives and property.

[0004] However, practical application testing revealed significant flaws in the structure disclosed in this patent. In complex scenarios such as fire rescue and accident relief, fire hooks are often used to retrieve objects with extremely low surface friction, such as smooth metal pipes and plastic pipes. However, when dealing with such smooth tubular objects, the hook head struggles to maintain a tight fit due to the object's highly slippery surface, leading to frequent slippage during operation. This problem not only significantly reduces rescue efficiency, hindering the efficient progress of rescue operations, but also poses a high risk of objects accidentally slipping, potentially posing a serious threat to surrounding rescue personnel and equipment, thus severely impeding the smooth conduct of rescue operations. Therefore, improvement and optimization are urgently needed. Utility Model Content

[0005] The purpose of this utility model is to provide an anti-slip fire hook, which addresses the problem in the existing technology where fire hooks, when hooking smooth metal pipes, plastic pipes, and other tubular objects, are prone to slipping due to low surface friction, making it difficult for the hook head to fit tightly. This leads to reduced rescue efficiency and safety hazards. The proposed solution is a uniquely designed hook head that generates a pre-tightening force when the fire hook contacts a smooth tubular object, enhancing grip and effectively preventing slippage, thus significantly improving rescue efficiency and safety.

[0006] This utility model is achieved through the following technical solution:

[0007] A non-slip fire hook includes: a hook rod body with a connecting hole on its side wall; a hook head mounted on the hook rod body and located at the edge of the connecting hole; a guide shaft rotatably mounted in the hook rod body and coaxially arranged with the hook rod body; a guide block mounted on the guide shaft and capable of reciprocating along the extension direction of the guide shaft; a driving component having a guide inclined portion and a transmission portion, the guide inclined portion cooperating with the guide block and the transmission portion located within the connecting hole; a return spring fitted outside the transmission portion, one end of the return spring connected to the inner wall of the connecting hole and the other end connected to the outer wall of the transmission portion; and a pre-pressure clamping plate connected to the transmission portion and located inside the hook head.

[0008] Furthermore, in this utility model, the above also includes a drive cover; the drive cover is rotatably mounted on the end of the hook rod body, and the drive cover is connected to the guide shaft; a slider is installed on the side wall of the guide block, and a guide groove that cooperates with the slider is opened on the inner wall of the hook rod body along the extension direction; the guide block and the guide shaft are connected by threads.

[0009] Furthermore, in this utility model, the outer wall of the hook rod body is provided with a rotating groove along the circumferential direction, and the inner wall of the drive cover is provided with a rotating tenon along the circumferential direction, the rotating tenon being rotatably installed inside the rotating groove.

[0010] Furthermore, in this invention, the hook rod body is a telescopic structure; the guide shaft includes a driven shaft section and a driving shaft section, the driven shaft section having a polygonal groove along the axial direction; the driving shaft section is at least partially engaged in the polygonal groove, and the driving shaft section can drive the driven shaft section to rotate. The driving shaft section can move along the extension direction of the driven shaft section, thereby adjusting the overall length of the driving shaft section and the driven shaft section.

[0011] Furthermore, in this utility model, the hook rod body includes an inner telescopic guide post and an outer telescopic sleeve, with the outer telescopic sleeve fitted over the inner telescopic guide post; multiple limiting through holes are provided on both sides of the outer telescopic sleeve along the extension direction; assembly grooves are provided on both sides of the inner telescopic guide post, and elastic elements are assembled in the assembly grooves, with positioning pins connected to the ends of the elastic elements; wherein, the positioning pins can engage with the corresponding limiting through holes to adjust the length of the hook rod body.

[0012] Furthermore, in this utility model, the pre-compression clamp is an arc-shaped structure, and the curvature of the pre-compression clamp is adapted to the curvature of the hook.

[0013] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0014] 1. This anti-slip fire hook utilizes the hook head and pre-compression clamp to securely hold the object being filled, effectively solving the problem of traditional fire hooks slipping when gripping smooth objects. In the complex scenarios commonly encountered in firefighting operations, traditional fire hooks struggle to stably grip objects with extremely low surface friction, such as smooth metal pipes and plastic pipes, causing them to easily slip and posing a serious safety threat to rescue personnel and equipment. The anti-slip fire hook of this application, through its clamping action, significantly increases the friction between the hook and the object, ensuring the object is firmly secured and greatly reducing the risk of slippage, creating a safer environment for rescue operations.

[0015] 2. Traditional fire hooks often suffer from slippage when gripping smooth objects, requiring firefighters to make repeated attempts, significantly wasting rescue time and hindering efficient rescue operations. This anti-slip fire hook, with its reliable anti-slip gripping mechanism, allows firefighters to quickly and accurately grasp target objects and rapidly carry out subsequent operations. In the critical moments of fire rescue and accident relief, it greatly shortens operation time, significantly improves rescue efficiency, and buys precious time to save lives and minimize losses. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 A three-dimensional diagram of an anti-slip fire hook;

[0018] Figure 2 This is a longitudinal sectional view of the anti-slip fire hook;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0021] Figure 5 for Figure 2 Enlarged view of point C in the middle;

[0022] Figure 6 for Figure 2 Enlarged view of point D in the middle.

[0023] The attached diagram shows the markings and corresponding component names:

[0024] 1-Hook rod body, 2-Hook head, 3-Drive cover, 4-Outer telescopic sleeve, 5-Inner telescopic guide post, 6-Guide shaft, 7-Guide block, 8-Rotating slide groove, 9-Rotating tenon, 10-Drive shaft section, 11-Driven shaft section, 12-Limiting through hole, 13-Assembly groove, 14-Elastic element, 15-Positioning pin, 16-Connecting hole, 17-Guide inclined section, 18-Transmission part, 19-Preload clamping plate. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0026] Example

[0027] Please refer to Figure 1 , Figure 2 and Figure 6 This utility model provides an anti-slip fire hook. The anti-slip fire hook mainly consists of key components such as a hook rod body 1, a hook head 2, a guide shaft 6, a guide block 7, a driving component, a return spring, and a pre-compression clamping plate 19. The hook rod body 1 has a connecting hole 16 on its side wall. The hook head 2 is installed on the hook rod body 1, located at the edge of the connecting hole 16. The guide shaft 6 is installed inside the hook rod body 1, and is coaxial with the hook rod body 1. The guide block 7 is assembled on the guide shaft 6 and can reciprocate along the axial direction of the guide shaft 6. The driving component consists of a guide inclined section 17 and a transmission section 18. The guide inclined section 17 can cooperate with the guide block 7, and the transmission section 18 is located inside the connecting hole 16. The return spring is sleeved outside the transmission section 18, with one end connected to the inner wall of the connecting hole 16 and the other end in contact with the surface of the transmission section 18. The pre-pressing clamp 19 is connected to the transmission part 18, and the pre-pressing clamp 19 is located inside the hook head 2.

[0028] Firefighters can control the guide block 7 to reciprocate along the axial direction of the guide shaft 6 through specific operations. When the guide block 7 moves to abut against the guide inclined surface 17 of the drive component, the guide block 7 applies pressure to the guide inclined surface 17. According to the principle of force decomposition, this pressure can be decomposed into a component force pointing into the connecting hole 16. Under the action of this component force, the guide inclined surface 17 is pushed into the connecting hole 16, simultaneously driving the transmission part 18 to move synchronously. Since the pre-pressure clamping plate 19 is connected to the transmission part 18, the movement of the transmission part 18 causes the pre-pressure clamping plate 19 to move towards the hook head 2, thereby gradually reducing the clamping space between the hook head 2 and the pre-pressure clamping plate 19, ultimately clamping the object located between them. During this process, the return spring is compressed.

[0029] After completing the clamping task, the firefighters control the guide block 7 to move in the opposite direction. At this time, the guide ramp 17 loses the pressure of the guide block 7. The return spring resets itself due to its elasticity, pushing the guide ramp 17 at least partially back into the hook body 1. At the same time, it drives the transmission part 18 and the pre-pressure clamping plate 19 to move in the opposite direction, moving the pre-pressure clamping plate 19 away from the hook head 2, increasing the clamping space between the pre-pressure clamping plate 19 and the hook head 2 to accommodate objects of different sizes and prepare for the next clamping operation.

[0030] Please refer to Figure 3 In some embodiments of this application, the drive cover 3 of the anti-slip fire hook is mounted on the end of the hook rod body 1 via a rotatable connection. The drive cover 3 is connected to the guide shaft 6, and the drive cover 3 and the guide shaft 6 can rotate synchronously. The slider on the side wall of the guide block 7 cooperates with the guide groove on the inner wall of the hook rod body 1 to restrict the movement direction of the guide block 7.

[0031] Working principle: Firefighters rotate the drive housing 3, which in turn drives the guide shaft 6 to rotate synchronously. As the guide shaft 6 rotates, the guide block 7, threadedly engaged with it and constrained by the guide groove, can only reciprocate along the axial direction of the guide shaft 6. By controlling the rotation of the drive housing 3, firefighters move the guide block 7 to a position that engages with the guide ramp 17, thus completing the object clamping. After clamping, the drive housing 3 is rotated in the opposite direction, causing the guide block 7 to move away from the guide ramp, and the device returns to its initial state, ready for the next clamping operation.

[0032] Specifically, the outer wall of the hook rod body 1 is provided with a continuously circumferential rotating groove 8. Correspondingly, the inner wall of the drive cover 3 is provided with a rotating tenon 9 along the circumferential direction, the size and shape of which are adapted to the rotating groove 8. The rotating tenon 9 is installed in the rotating groove 8 with a clearance fit, ensuring that the rotating tenon 9 can rotate flexibly within the rotating groove 8, thereby enabling the drive cover 3 to smoothly rotate relative to the hook rod body 1.

[0033] Please refer to Figure 4 and Figure 5 In some embodiments of this application, the hook body 1 adopts a telescopic structure. This structure allows the anti-slip fire hook to flexibly adjust its length in different scenarios, greatly improving its ease of use and adaptability. When working in confined spaces, the hook can be retracted for easy operation and carrying; when it is necessary to reach targets at a greater distance, the hook can be extended to a suitable length, effectively expanding the working range.

[0034] For example, when the hook body 1 performs the telescopic length adjustment action, the guide shaft 6 synchronously extends and retracts adaptively. The driving shaft section 10 of the guide shaft 6 can generate corresponding displacement in the axial direction relative to the driven shaft section 11. The driven shaft section 11 is machined with a polygonal groove along its own axial direction, and the cross-section of the driving shaft section 10 is also polygonal, achieving a match between the two in terms of polygonal shape and size. This matching design not only ensures the stability of power transmission between the driving shaft section 10 and the driven shaft section 11 in the circumferential direction, but also allows them to move freely relative to each other in the axial direction. The end of the driving shaft section 10 away from the driven shaft section 11 is firmly connected to the drive cover 3; the end of the driven shaft section 11 away from the driving shaft section 10 is rotatably assembled with the end inside the hook body 1, ensuring the flexibility and stability of rotation.

[0035] In practical firefighting operations, firefighters apply force to rotate the drive housing 3, which in turn drives the active shaft section 10 to rotate synchronously. Based on the tight fit between the polygonal structures of the active shaft section 10 and the driven shaft section 11, the active shaft section 10 efficiently transmits rotational power to the driven shaft section 11, causing it to rotate synchronously. During rotation, the driven shaft section 11, along with the guide block 7 mounted on it, smoothly converts the circular rotation of the driven shaft section 11 into the reciprocating linear motion of the guide block 7 along the axial direction of the driven shaft section 11, based on the principle of threaded transmission.

[0036] When there is a need to adjust the length of the hook rod body 1, the drive shaft section 10 can advance into the depth of the polygonal channel of the driven shaft section 11, or retract and extend from the channel, according to the extension and retraction trend of the hook rod body 1. The drive shaft section 10 can perfectly match the change in the length of the hook rod body 1, ensuring that the guide shaft 6 transmits power stably and efficiently throughout the entire extension and retraction of the hook rod body 1, effectively guaranteeing the stability and reliability of the entire device in complex rescue environments.

[0037] Please refer to Figure 5 In some embodiments of this application, the hook rod body 1 is composed of an inner telescopic guide post 5 and an outer telescopic sleeve 4. The outer telescopic sleeve 4 is fitted onto the outside of the inner telescopic guide post 5, and the two form a telescopic structure that can slide relative to each other, laying the foundation for flexible adjustment of the length of the hook rod body 1.

[0038] Specifically, multiple limiting through holes 12 are evenly distributed on both sides of the outer telescopic sleeve 4 along its extension direction. These limiting through holes 12 are the key structures for achieving length adjustment and positioning. Correspondingly, assembly slots 13 are respectively opened on both sides of the inner telescopic guide post 5. Each assembly slot 13 is carefully assembled with an elastic element 14, and the end of the elastic element 14 is connected to the positioning pin 15.

[0039] When firefighters need to adjust the length of the hook rod body 1, they press the positioning pin 15. Under pressure, the positioning pin 15 overcomes the elastic force generated by the elastic element 14, disengages from the current limiting through hole 12, and slowly retracts into the assembly groove 13. At this time, the elastic element 14 is compressed due to the pressure. In this state, the relative sliding restriction between the inner telescopic guide post 5 and the outer telescopic sleeve 4 is released, allowing them to move freely relative to each other. When the inner telescopic guide post 5 and the outer telescopic sleeve 4 move relative to each other to a preset position, the originally compressed elastic element 14 begins to release its restoring force. Under the action of the restoring force, the positioning pin 15 is quickly pushed out of the assembly groove 13 and engages in the corresponding limiting through hole 12. In this way, the inner telescopic guide post 5 and the outer telescopic sleeve 4 achieve reliable positioning, thus successfully completing the length adjustment operation of the hook rod body 1.

[0040] It is worth mentioning that during the entire length adjustment process of the hook body 1, the driving shaft section 10 of the guide shaft 6 can move axially a corresponding distance within the polygonal channel inside the driven shaft section 11 according to the extension and retraction of the hook body 1. This adaptive movement ensures that the guide shaft 6 can maintain a stable operating state during the extension and retraction of the hook body 1, continuously and effectively performing its power transmission function, and providing a strong guarantee for the reliable use of the anti-slip fire hook under different working conditions.

[0041] In some embodiments of this application, the pre-compression clamp 19 is designed with an arc-shaped structure, and the curvature of the pre-compression clamp 19 is adapted to the curvature of the hook head 2. The arc-shaped design of the pre-compression clamp 19 can form a tight fit with the hook head 2 at multiple positions. When performing object clamping operations, this fit can evenly distribute the clamping force on the surface of the clamped object, avoiding local stress concentration and preventing damage to the clamped object. At the same time, due to the adaptation of the curvature of the pre-compression clamp 19 and the hook head 2, the two can work together better during the clamping process, providing all-round constraint for the clamped object, thereby significantly enhancing the stability of the clamping and ensuring that the anti-slip fire hook can reliably complete the object clamping task under various complex working conditions.

[0042] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An anti-slip fire hook, characterized in that, The utility model provides a hook rod body (1), the side wall of hook rod body (1) is equipped with the through -hole (16) that communicates; Hook head (2), hook head (2) is assembled on hook rod body (1), and hook head (2) is located the edge of through -hole (16); Guide shaft (6) is installed in hook rod body (1), and guide shaft (6) is coaxial with hook rod body (1) arrangement; Guide block (7) is assembled on guide shaft (6), and guide block (7) can reciprocate along the extension direction of guide shaft (6); Driving piece has guide inclined surface part (17) and transmission part (18), guide inclined surface part (17) can cooperate with guide block (7), and transmission part (18) is located in through -hole (16); Reset spring is sleeved on the outside of transmission part (18), one end of reset spring is connected with the inner wall of through -hole (16), and the other end of reset spring is connected with the surface wall of transmission part (18); Pre -pressing clamping plate (19) is connected with transmission part (18), and pre -pressing clamping plate (19) is located on the inside of hook head (2). It also includes a drive cover (3); 2. The anti-slip fire hook of claim 1, wherein The drive cover (3) is rotatably installed on the end of the hook rod body (1), and the drive cover (3) is connected with the guide shaft (6); The side wall of the guide block (7) is provided with a sliding block, and the inner wall of the hook rod body (1) is provided with a guide groove along the extension direction, which cooperates with the sliding block, and the guide block (7) is threadedly connected with the guide shaft (6). The outer wall of the hook rod body (1) is provided with a rotating sliding groove (8) along the circumferential direction, and the inner wall of the drive cover (3) is provided with a rotary tenon (9) along the circumferential direction, which is rotatably installed in the rotating sliding groove (8).

3. The anti-slip fire hook of claim 2, wherein The hook rod body (1) is a telescopic structure; 4. The anti-slip fire hook according to any one of claims 1 to 3, characterized in that, The guide shaft (6) includes a driven shaft segment (11) and a driving shaft segment (10), and the driven shaft segment (11) is provided with a polygonal channel along the axial direction; The driving shaft segment (10) is at least partially inserted into the polygonal channel, and the driving shaft segment (10) can drive the driven shaft segment (11) to rotate; Wherein, the driving shaft segment (10) can move along the extension direction of the driven shaft segment (11), so as to adjust the overall length of the driving shaft segment (10) and the driven shaft segment (11). The hook rod body (1) includes an inner telescopic guide column (5) and an outer telescopic sleeve (4), and the outer telescopic sleeve (4) is sleeved outside the inner telescopic guide column (5); 5. The anti-slip fire hook of claim 4, wherein, The outer telescopic sleeve (4) is provided with a plurality of limiting through holes (12) on both sides along the extension direction; The inner telescopic guide column (5) is provided with an assembly groove (13) on both sides, and the assembly groove (13) is provided with an elastic element (14), and the end of the elastic element (14) is connected with a positioning bolt (15); Wherein, the positioning bolt (15) can be limitedly matched with the corresponding limiting through hole (12), so as to adjust the length of the hook rod body (1). ​ 6. The anti-slip fire hook according to any one of claims 1 to 3, characterized in that, The pre-pressing clamping plate (19) is in an arc structure, and the curvature of the pre-pressing clamping plate (19) is matched with the curvature of the hook head (2).

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