Fire-fighting hook

Abstract

The utility model discloses a fire-fighting hook, and relates to the technical field of fire-fighting equipment, and the scheme is as follows: the fire-fighting hook comprises an operating rod body, the forcible entry unit is mounted at the end part of the operating rod body; the hook head comprises a grabbing hook part and a connecting part, the connecting part is rotationally connected with the operating rod body, and a sliding groove is formed in the connecting part in the extending direction; the linear sliding block is installed in the sliding groove, and the linear sliding block can slide in a reciprocating mode in the extending direction of the sliding groove; the driving lantern ring is assembled on the operating rod body, and the driving lantern ring can slide in a reciprocating mode in the extending direction of the operating rod body; one end of the transmission shaft is mounted on the driving lantern ring, and the other end of the transmission shaft is rotationally mounted on the linear sliding block; the structure design of the hook head can be optimized, the phenomena that the hook head slips and falls off in the rescue process are effectively avoided, the rescue efficiency is improved, and the safety of trapped people is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to fire fighting equipment technical field, specifically a fire hook. BACKGROUND

[0002] The fire hook is the key equipment for fire rescue. In case of fire, the fireman hooks it to the door and window, metal frame and other obstacles, breaks and opens the rescue channel by the principle of lever. In high-altitude rescue, it acts as a temporary anchor point for the fireman to fix the rope and climb. In a narrow space, the hook head can enter the gap and hook the clothes or limbs of the trapped person to implement rescue. In case of building collapse, it can also temporarily fix the equipment and support structure. With its diverse functions, the fire hook becomes an indispensable tool in complex rescue.

[0003] According to the authorized announcement number (CN220404653U) disclosed, a fire hook mainly comprises a first branch rod, a second branch rod and a connecting structure therebetween. In actual fire fighting operation, when there are obstacles in the fire scene hindering rescue action, the fireman can use the fire hook to aim the breaking head at the obstacle and reasonably apply force to carry out breaking operation and open a rescue channel for rescue personnel to pass through and evacuate the trapped personnel. In addition, when rescuing the trapped person, the fireman can hook the clothes or surrounding objects of the trapped person with the hook head of the fire hook, and safely drag the trapped person away from the danger area by relying on the force point provided by the fire hook, thereby playing a key role in the rescue action of protecting people's life and property safety.

[0004] The structure disclosed in the patent has defects in actual application, specifically as follows: in actual rescue scene, such as site environment bumping, shaking during rescue process, or external force disturbance caused by struggling of the trapped person due to fear, which will cause the hook head to easily fall off the hooked object. Once the falling occurs, the rescue action will be instantly stalled, which undoubtedly greatly increases the probability of rescue failure, seriously delays the valuable rescue opportunity, and further causes very adverse effects on the efficiency and safety of the entire rescue action. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a fire hook, which can solve the problems of easy slipping of the hook head in the prior art, lack of anti-falling structure, easy falling of the hook head from the hooked object during rescue, and influence on rescue efficiency and safety, and proposes a solution, which can optimize the structural design of the hook head, effectively avoid the slipping and falling of the hook head during rescue, improve the rescue efficiency and ensure the safety of the trapped person.

[0006] The utility model is realized by the following technical scheme:

[0007] A fire hook includes: an operating rod body; a demolition unit installed at the end of the operating rod body; a hook head including a gripping portion and a connecting portion, the connecting portion being rotatably connected to the operating rod body, and the connecting portion having a sliding groove along its extension direction; a linear slider installed inside the sliding groove, the linear slider being capable of reciprocating along the extension direction of the sliding groove; a drive collar assembled on the operating rod body, the drive collar being capable of reciprocating along the extension direction of the operating rod body; and a drive shaft, one end of the drive shaft being installed on the drive collar, and the other end of the drive shaft being rotatably installed on the linear slider; wherein the gripping portion can rotate to fit against the demolition unit, and an anti-detachment area is formed between the gripping portion and the demolition unit.

[0008] Furthermore, in this utility model, the aforementioned operating lever body includes an inner telescopic guide post and an outer telescopic sleeve. The outer telescopic sleeve is fitted onto the outside of the inner telescopic guide post and can reciprocate along the axial direction of the inner telescopic guide post. Multiple first 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. The ends of the elastic elements are connected to first positioning pins. The first positioning pins can be limited and engaged with the corresponding first limiting through holes, thereby adjusting the overall length of the inner telescopic guide post and the outer telescopic sleeve.

[0009] Furthermore, in this utility model, the above also includes a return spring and a second positioning pin; a drive collar is assembled on the outside of the inner telescopic guide post, and the drive collar has an assembly hole; the second positioning pin passes through the return spring; the return spring is assembled in the assembly hole, one end of the return spring is connected to the inner wall of the assembly hole, and the other end of the return spring is connected to the outer wall of the second positioning pin; the inner telescopic guide post has multiple second limiting through holes along the extension direction; wherein, the second positioning pin can cooperate with the multiple second limiting through holes respectively, thereby realizing the angle adjustment of the gripping hook part.

[0010] Furthermore, in this utility model, the second positioning pin is provided with a guide slope; when the drive collar moves toward the demolition unit, the guide slope can cooperate with the second limiting through hole.

[0011] Furthermore, in this utility model, the aforementioned demolition unit is provided with a positioning slot, and at least part of the hook part can rotate into the positioning slot to achieve a positioning engagement state between the hook part and the positioning slot.

[0012] Furthermore, in this invention, an anti-slip layer is provided on the side of the outer telescopic sleeve away from the inner telescopic guide post.

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

[0014] 1. In the design of the fire hook in the present application, the hook part can be flexibly rotated to closely fit with the breaking unit, and the two together build a stable anti-falling area. In actual rescue scenarios, such as the shaking of the scene environment, the shaking generated during rescue operations, or the external force disturbance exerted by the trapped person struggling due to fear, it is difficult to cause the hook head to fall off. This is because the breaking unit skillfully blocks the possible disengagement path of the object on the hook part.

[0015] 2. The breaking unit is ingeniously designed with a positioning slot, and the hook part can be at least partially accurately rotated into the slot to achieve very accurate positioning and cooperation. In a bumpy rescue scene, this positioning and cooperation can effectively suppress the shaking of the hook part relative to the breaking unit. Taking post-earthquake debris rescue as an example, the scene environment is complex, the ground is bumpy, and the trapped person may struggle violently due to panic, but the positioning slot can ensure that the hook part is firmly fixed, avoid the hook head from falling off the hooked object due to shaking, and thus ensure that the rescue operation can continue and be efficient, significantly improving the efficiency and safety of rescue.

[0016] 3. The operating rod body is composed of an inner telescopic guide column and an outer telescopic sleeve, and has the function of flexible length adjustment. In the face of complex and variable rescue scenes, firefighters can accurately adjust the length of the operating rod body according to the actual situation, so as to carry out rescue operations in a more stable and precise posture. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the embodiments of the present application, constitute a part of the present application, and do not constitute a limitation on the embodiments of the present application. In the drawings:

[0018] Figure 1 is a perspective view of a fire hook;

[0019] Figure 2 is a sectional view of the inner telescopic guide column and the driving sleeve ring;

[0020] Figure 3 is Figure 2 is a sectional view of the inner telescopic guide column and the driving sleeve ring;

[0021] Figure 4 is a sectional view of the inner telescopic guide column and the outer telescopic sleeve;

[0022] Figure 5 is Figure 4 is an enlarged view of position B in FIG. 6;

[0023] Figure 6 is a structural schematic view of the breaking unit provided with a positioning slot.

[0024] Markings in the drawings and corresponding component names:

[0025] 1 - operating rod body, 2 - outer telescopic sleeve, 3 - inner telescopic guide column, 4 - hook head, 5 - breaking unit, 6 - connecting part, 7 - grappling part, 8 - driving sleeve ring, 9 - transmission shaft, 10 - sliding groove, 11 - linear slider, 12 - second limiting through hole, 13 - second positioning pin, 14 - assembly hole, 15 - return spring, 16 - guide inclined surface, 17 - first limiting through hole, 18 - assembly groove, 19 - elastic member, 20 - first positioning pin, 21 - guide camber, 22 - positioning clamping groove. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the utility model is further described in detail below in combination with examples and drawings. The illustrative embodiment of the utility model and its description are only used to explain the utility model, and do not limit the utility model.

[0027] Embodiment

[0028] Please refer to Figure 1 The utility model provides a kind of fire hook. Operating rod body 1 is the control core of whole device, provides stable holding for firemen. The front end of operating rod body 1 is firmly installed breaking unit 5, and the unit is designed to efficiently break various obstructions in fire scene, quickly open critical lifesaving passage.

[0029] Hook head 4 component includes grappling part 7 and connecting part 6. Connecting part 6 can be articulated with operating rod body 1, to ensure flexible rotation. Connecting part 6 is provided with sliding groove 10 along axial direction, and linear slider 11 is adapted to the inside of sliding groove 10, and linear slider 11 can smoothly reciprocate along the direction of sliding groove 10. Driving sleeve ring 8 is tightly sleeved outside operating rod body 1, and driving sleeve ring 8 has the ability to move freely along the axial direction of rod body. Transmission shaft 9 is stably connected with driving sleeve ring 8 at one end, and transmission shaft 9 is rotatably connected (can be articulated) with linear slider 11 at the other end.

[0030] In an actual rescue scene, the fireman holds the operating rod body 1, first uses the breaking unit 5 to implement breaking operation, and quickly opens the rescue path. Then, the driving sleeve ring 8 is pushed. Since the driving sleeve ring 8 is closely sleeved with the operating rod body 1, when the driving sleeve ring 8 moves towards the breaking unit 5, the transmission shaft 9 can be driven to follow synchronously. Based on the articulated design of the transmission shaft 9 and the linear slider 11, the displacement of the transmission shaft 9 causes the linear slider 11 to slide in the sliding groove 10 towards the hook part 7, thereby driving the whole hook head 4 to rotate towards the breaking unit 5 until the hook part 7 is closely attached to the surface of the breaking unit 5, and the two cooperatively form a reliable anti-falling area. As long as the position of the driving sleeve ring 8 is fixed, the hook part 7 always maintains the attached state with the breaking unit 5, effectively preventing the objects in the anti-falling area from falling off. For example, when rescuing a trapped person, after the hook part 7 hooks the clothes of the trapped person, even if the rescue process encounters a bumpy road, relying on the stable attachment of the hook part 7 and the breaking unit 5 can greatly reduce the risk of falling off, and effectively ensure the safety and efficiency of the rescue operation.

[0031] Please refer to Figure 4 and Figure 5 In some embodiments of the utility model, the operating rod body 1 of the fire hook is composed of the inner telescopic guide column 3 and the outer telescopic sleeve 2. The outer telescopic sleeve 2 is closely sleeved on the outer side of the inner telescopic guide column 3, and the two build a sliding connection structure. The outer telescopic sleeve 2 can smoothly reciprocate along the axial direction of the inner telescopic guide column 3, so as to realize flexible adjustment of the overall length of the operating rod body 1.

[0032] It should be noted that the two sides of the inner telescopic guide column 3 are respectively provided with the first positioning pin 20, and each first positioning pin 20 is stably connected with the inner telescopic guide column 3 through the elastic element 19. In the normal state, the elastic element 19 is in the natural stretching state, so that the first positioning pin 20 is clamped into the corresponding first limiting through hole 17 on the two sides of the outer telescopic sleeve 2 under the action of the elastic force, thereby firmly locking the outer telescopic sleeve 2 and the inner telescopic guide column 3 at the current relative position, and effectively ensuring the stability of the length of the operating rod body 1.

[0033] When the fireman needs to adjust the length of the operating rod body 1, the first positioning pin 20 can be manually pressed to overcome the elastic force of the elastic element 19 and retract into the corresponding assembly groove 18 on the inner telescopic guide column 3. At this time, the elastic element 19 is in a compressed state, and the first positioning pin 20 is immediately separated from the first limiting through hole 17 of the outer telescopic sleeve 2. Then, the fireman can move the inner telescopic guide column 3 and the outer telescopic sleeve 2 relatively until the predetermined target position is reached. At this time, due to the elastic force of the elastic element 19, the first positioning pin 20 will automatically pop out and quickly clamp into the first limiting through hole 17 at the corresponding position of the outer telescopic sleeve 2, smoothly completing the adjustment and relocking of the length of the operating rod body 1.

[0034] Especially worth mentioning is that the end of the first positioning plug 20 is designed with a guide arc surface 21. When adjusting the length of the operating rod body 1, when the firefighter presses the first positioning plug 20 to make it disengage from the first limiting through hole 17, the guide arc surface 21 can significantly reduce the friction between the plug and the edge of the limiting through hole, effectively reduce the operation resistance, so that the first positioning plug 20 can be more smoothly and conveniently disengaged from the corresponding first limiting through hole 17, greatly improving the convenience and efficiency of the length adjustment process of the operating rod body 1.

[0035] Please refer to Figure 2 and Figure 3 In some embodiments of the utility model, the driving sleeve 8 is tightly sleeved on the outside of the inner telescopic guide column 3, and the driving sleeve 8 is provided with an assembly hole 14. The reset spring 15 is assembled in the assembly hole 14, and the second positioning plug 13 penetrates through the reset spring 15. One end of the reset spring 15 is firmly connected with the inner wall of the assembly hole 14, and the other end of the reset spring 15 is stably connected with the outer wall of the second positioning plug 13. Along the axial direction of the inner telescopic guide column 3, a plurality of second limiting through holes 12 are uniformly distributed. Through the cooperation of the second positioning plug 13 and the second limiting through holes 12, the angle adjustment function of the hook part 7 can be realized.

[0036] Specifically, in actual fire fighting operation, the firefighter needs to follow the following standard operation process: first, the driving sleeve 8 needs to be moved away from the breaking unit 5. Specifically, the firefighter pulls up the second positioning plug 13, overcomes the elastic force of the reset spring 15, and makes the second positioning plug 13 disengage from the second limiting through hole 12 where it is currently located, and in this process, the reset spring 15 is in a compressed state. Subsequently, the firefighter pushes the driving sleeve 8 away from the breaking unit 5 by a predetermined distance, and then removes the external force applied to the second positioning plug 13. At this time, the reset spring 15 restores the deformation, and the elastic force of the reset spring 15 pushes the second positioning plug 13 to embed into the corresponding second limiting through hole 12 after moving, so as to realize the stable fixation of the driving sleeve 8. At this time, a larger grabbing space is expanded between the hook part 7 and the breaking unit 5, which is convenient for placing the object to be grabbed therein.

[0037] When the object to be grabbed successfully enters the grabbing area, the firefighter needs to pull the second positioning pin 13 again, so that the second positioning pin 13 is separated from the second limiting through hole 12 where it is currently located, and then pushes the driving sleeve 8 towards the breaking unit 5. During this operation process, the grabbing space between the grabbing hook part 7 and the breaking unit 5 gradually decreases. Until the driving sleeve 8 moves to the pre-set position, the grabbing hook part 7 and the breaking unit 5 are in close contact with each other, and a reliable anti-falling area is formed between them. Since the breaking unit 5 just blocks the possible falling path of the object on the grabbing hook part 7, it can effectively prevent the object hooked by the grabbing hook part 7 from falling off the grabbing hook part 7. At this time, the firefighter removes the pulling force on the second positioning pin 13, and under the action of the return spring 15, the second positioning pin 13 is clamped into the corresponding second limiting through hole 12, thereby maintaining the close contact state of the grabbing hook part 7 and the breaking unit 5, and ensuring that the anti-falling area can exist continuously and stably, without the firefighter continuously pushing the driving sleeve 8.

[0038] In addition, the firefighter can flexibly push the driving sleeve 8 to different pre-set positions, so that the second positioning pin 13 is embedded in the corresponding pre-set second limiting through hole 12, thereby adjusting the distance between the grabbing hook part 7 and the breaking unit 5, and adapting to different sizes of trapped objects. When a larger object needs to be dragged, the distance between the grabbing hook part 7 and the breaking unit 5 can be appropriately increased; and when a smaller object is faced, the distance can be correspondingly reduced.

[0039] Please refer to Figure 3 In some embodiments of the utility model, the second positioning pin 13 is provided with a guide inclined surface 16. When the driving sleeve 8 moves towards the breaking unit 5, the guide inclined surface 16 can establish a cooperation relationship with the second limiting through hole 12 on the inner telescopic guide column 3.

[0040] Specifically, in the process of pushing the driving sleeve 8 towards the breaking unit 5, it will drive the second positioning pin 13 to displace synchronously. Once the second positioning pin 13 reaches the second limiting through hole 12 on the outer side of the inner telescopic guide column 3 and enters it, the continuous movement of the driving sleeve 8 towards the breaking unit 5 will promote the guide inclined surface 16 of the second positioning pin 13 to interact with the hole wall of the second limiting through hole 12. According to the force decomposition theory, the pressure exerted by the hole wall on the guide inclined surface 16 can be decomposed into a component force pointing to the inside of the assembly hole 14, which drives the second positioning pin 13 to move towards the inside of the assembly hole 14, thereby causing the return spring 15 to be compressed.

[0041] In the above state, the fireman can continue to push the drive collar 8 forward to the breaking unit 5. When the next second limiting through hole 12 is encountered, the reset spring 15 pushes the second positioning pin 13 into the corresponding second limiting through hole 12 by virtue of the force of restoring deformation. Thanks to the design of the guide slope 16, the drive collar 8 can continue to move towards the breaking unit 5 until it reaches the pre-set position, thereby realizing the close clamping of the grappling hook part 7 and the breaking unit 5 on the object.

[0042] During the dragging operation, the drive collar 8 will not move away from the breaking unit 5 due to non-human factors. This is because the front end of the second positioning pin 13 adopts a guide slope 16 structure, and the rear end of the second positioning pin 13 is a straight face structure. This structural feature effectively avoids the accidental reverse movement of the drive collar 8. If the fireman wants to move the drive collar 8 away from the breaking unit 5, he only needs to lift the second positioning pin 13 to make it disengage from the current corresponding second limiting through hole 12, and the reverse displacement operation of the drive collar 8 can be successfully achieved.

[0043] It should be noted that the design of the guide slope 16 greatly optimizes the operation process of the fireman. When moving the drive collar 8 towards the breaking unit 5, the fireman does not need to manually lift the second positioning pin 13 to make it disengage from the corresponding second limiting through hole 12, which significantly improves the convenience and efficiency of the operation.

[0044] Please refer to Figure 6 In some embodiments of the utility model, the breaking unit 5 is provided with a positioning slot 22. At least a part of the grappling hook part 7 can rotate into the positioning slot 22, thereby achieving a stable positioning and matching state between the grappling hook part 7 and the positioning slot 22.

[0045] In the actual execution of the rescue operation scene of dragging the object, especially in the face of complex road conditions such as bumpy road, the above positioning and matching mechanism can fully play a role, effectively inhibiting the shaking of the grappling hook part 7 relative to the breaking unit 5. This feature fundamentally avoids the potential risk of the grappling hook part 7 shaking and separating from the grabbed object, providing a solid guarantee for the stability and reliability of the rescue operation, and significantly improving the overall rescue efficiency and safety.

[0046] In some embodiments of the utility model, the outer telescopic sleeve 2 is provided with an anti-skid layer on the surface away from the inner telescopic guide column 3. The anti-skid layer is made of a material with high friction coefficient, which is designed to ensure that the fireman can maintain a stable grip state when holding the operating rod body 1, regardless of the complex environment, such as high temperature, humid environment causing hand sweating, etc. Effectively avoid the interference of the normal progress of the rescue work caused by the accidental falling of the operating rod body 1, and effectively improve the safety and reliability of the fire operation process.

[0047] The above specific embodiments explain the purpose, technical scheme and beneficial effects of the present application in further detail, and it should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fire hook characterised in that, Include: Operating rod body (1); Breaking unit (5), the breaking unit (5) is installed at the end of the operating rod body (1); Hook head (4), the hook head (4) includes a grappling hook part (7) and a connecting part (6), the connecting part (6) is rotatably connected with the operating rod body (1), and the connecting part (6) is provided with a sliding groove (10) along the extension direction; Linear slider (11), the linear slider (11) is installed inside the sliding groove (10), and the linear slider (11) can reciprocate along the extension direction of the sliding groove (10); Driving collar (8), the driving collar (8) is assembled on the operating rod body (1), and the driving collar (8) can reciprocate along the extension direction of the operating rod body (1); Transmission shaft (9), one end of the transmission shaft (9) is installed on the driving collar (8), and the other end of the transmission shaft (9) is rotatably installed on the linear slider (11); Wherein, the grappling hook part (7) can be rotated to be attached to the breaking unit (5), and a anti-disengagement area is formed between the grappling hook part (7) and the breaking unit (5).

2. The fire hook of claim 1, wherein, The operating rod body (1) includes an inner telescopic guide column (3) and an outer telescopic sleeve (2), the outer telescopic sleeve (2) is sleeved outside the inner telescopic guide column (3), and the outer telescopic sleeve (2) can reciprocate along the axial direction of the inner telescopic guide column (3); A plurality of first limiting through holes (17) are formed on both sides of the outer telescopic sleeve (2) along the extension direction; A plurality of assembly grooves (18) are formed on both sides of the inner telescopic guide column (3), and a plurality of elastic members (19) are assembled in the assembly grooves (18), and the ends of the elastic members (19) are connected with a plurality of first positioning pins (20); Wherein, the first positioning pins (20) can be limitedly matched with the corresponding first limiting through holes (17), so as to adjust the overall length of the inner telescopic guide column (3) and the outer telescopic sleeve (2).

3. The fire hook of claim 2, wherein, Further comprising a reset spring (15) and a second positioning pin (13); The driving collar (8) is assembled outside the inner telescopic guide column (3), and the driving collar (8) is provided with an assembly hole (14); The second positioning pin (13) penetrates the reset spring (15); The reset spring (15) is assembled in the assembly hole (14), one end of the reset spring (15) is connected with the inner wall of the assembly hole (14), and the other end of the reset spring (15) is connected with the surface wall of the second positioning pin (13); A plurality of second limiting through holes (12) are formed on the inner telescopic guide column (3) along the extension direction; Wherein, the second positioning pin (13) can be matched with a plurality of the second limiting through holes (12) respectively, so as to realize the angle adjustment of the grappling hook part (7).

4. The fire hook of claim 3, wherein, The second positioning pin (13) is provided with a guide inclined surface (16); When the driving collar (8) moves towards the breaking unit (5), the guide inclined surface (16) can be matched with the second limiting through hole (12).

5. The fire hook according to any one of claims 1 to 4, characterised in that, The breaking unit (5) is provided with a positioning clamping groove (22), and the hook part (7) can be rotated at least partially into the positioning clamping groove (22), so that the hook part (7) is in a positioning and matching state with the positioning clamping groove.

6. The fire hook of claim 2, wherein, The outer telescopic sleeve (2) is provided with an anti-skid layer on the side away from the inner telescopic guide column (3).

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