Anti-shaking fire-fighting extension ladder

Abstract

The utility model discloses an anti-shake fire-fighting extension ladder, which relates to the technical field of fire-fighting rescue instruments, and comprises an outer ladder and an inner ladder connected inside the outer ladder in a sliding manner, the outer surfaces of the two sides of the outer ladder are fixedly connected with fixed seats, and the inner surfaces of the fixed seats are rotatably connected with supporting rods; and a one-way locking mechanism is arranged in the fixed seat. Compared with an existing common fire-fighting extension ladder, according to the anti-shaking fire-fighting extension ladder, when a supporting rod rotates downwards, a gear can stir a one-way locking rod and compress a locking spring, when the supporting rod rotates upwards, the one-way locking rod with a chamfer on a single face can prevent the gear from rotating reversely so as to achieve a good supporting and locking effect, and at the moment, a stirring sliding block is stirred, so that the anti-shaking fire-fighting extension ladder is formed. After the extension ladder is retracted, one end of the support rod is sleeved with the locking lantern ring, so that the support rod can be prevented from being unfolded accidentally, a good auxiliary support function can be achieved, the extension ladder is convenient to unfold and retract, and the extension ladder can be effectively prevented from shaking in the using process.

Description

Technical Field

[0001] The utility model relates to the technical field of fire rescue equipment, in particular to an anti-sway fire ladder. Background Art

[0002] Firefighting means eliminating hidden dangers and preventing disasters (i.e. preventing and resolving man-made, natural and accidental disasters encountered by people in the process of life, work and study). Of course, the narrow meaning in the early stage of people's understanding is: (extinguishing) fire, mainly including the rescue of personnel at the fire scene, the rescue of important facilities and equipment, cultural relics, the safety protection and rescue of important property, extinguishing fire, etc. The purpose is to reduce the degree of damage caused by the fire, reduce casualties and property losses, and ladders are often used in firefighting and rescue.

[0003] For example, the fire rescue ladder with application number 202121403685.6 has been improved by adding a locking structure to the device. The locking structure can fix the ladder. The staff only needs to pull the handle to separate the latch from the limit rod. At this time, the length of the ladder can be adjusted. Conversely, the staff only needs to pull the handle in the opposite direction to insert the latch into the limit rod to prevent the ladder from being pulled. In this way, the safety of the device can be effectively improved. However, it is difficult for the device to provide auxiliary support for the ladder body when erecting the ladder body to achieve a better anti-shake effect.

[0004] Therefore, in view of this, the existing structural deficiencies are studied and improved, and an anti-sway fire ladder is proposed. Utility Model Content

[0005] The utility model aims to provide a fire ladder that prevents shaking, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-sway fire ladder, comprising an outer ladder and an inner ladder slidably connected to the outer ladder, the outer surfaces of both sides of the outer ladder are fixedly connected to fixed seats, the inner surfaces of the fixed seats are rotatably connected to support rods, and a one-way locking mechanism is arranged inside the fixed seat.

[0007] Preferably, the one-way locking mechanism includes a gear fixedly connected to the front surface of the upper end of the support rod, the fixed seat is internally slidably connected with a one-way locking rod, the outer surface of the one-way locking rod extends to the front surface of the fixed seat and is fixedly connected with a toggle slider, and a locking spring is arranged on the outside of the one-way locking rod.

[0008] Preferably, a swivel seat is fixedly connected to the outer surfaces of both sides of the outer ladder at positions away from the fixed seat, and a locking ring is rotatably connected to the inner surface of the swivel seat.

[0009] Preferably, an anti-drop cover plate is fixedly connected to the upper end of the outer ladder, and self-locking seats are fixedly connected to the outer surfaces of both sides of the outer ladder at positions above the swivel seat.

[0010] Preferably, an insert rod is slidably connected to the interior of the self-locking seat, and a plurality of slots are provided on the outer surfaces of both sides of the inner ladder.

[0011] Preferably, a compression spring slider is fixedly connected to the outer surface of the insertion rod, a self-locking spring is provided on the right outer surface of the compression spring slider, and the self-locking spring is sleeved on the outer surface of the insertion rod.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model is provided with an outer ladder, an inner ladder, a fixed seat, a support rod, a swivel seat, a locking collar, a one-way locking mechanism, a gear, a one-way locking rod, a toggle slider, and a locking spring. When the outer ladder is erected, the support rod rotates downward, and the gear can toggle the one-way locking rod to compress the locking spring. When the support rod rotates upward, the one-way locking rod with a single chamfer can prevent the gear from rotating in the opposite direction, so as to achieve a better supporting and locking effect. At this time, the toggle slider is toggled to compress the locking spring, so that the one-way locking rod can be disengaged from the teeth of the gear, and the support rod can be fitted with the outer ladder for retraction. After retraction, the locking collar is used to cover one end of the support rod to prevent the support rod from being accidentally deployed. This design can achieve a better auxiliary support function, facilitate deployment and retraction, and effectively prevent the ladder from shaking during use.

[0014] 2. The utility model adopts the arrangement of the anti-detachment cover plate, the self-locking seat, the insertion rod, the card slot, the compression spring slider and the self-locking spring. When the ladder is pulled, the inner ladder slides upward inside the outer ladder. During the sliding process, the inner ladder can move the insertion rod to achieve any sliding effect. After being pulled to the specified position, the insertion rod can be engaged with the inside of the card slot to prevent the inner ladder from sliding down. This design can achieve a better self-locking effect. When retracting the inner ladder, the insertion rod is pulled to drive the compression spring slider to compress the self-locking spring, so that the insertion rod can be separated from the inside of the card slot, thereby completing the function of retracting the inner ladder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 For this utility model Figure 1 A schematic diagram of a cross-sectional structure of a front view portion;

[0017] Figure 3 For this utility model Figure 2 An enlarged structural diagram of the one-way locking mechanism 5;

[0018] Figure 4 For this utility model Figure 1A is a schematic diagram of the enlarged structure of the middle part;

[0019] Figure 5 For this utility model Figure 2 Schematic diagram of the enlarged structure of B.

[0020] In the figure: 1. outer ladder; 2. inner ladder; 3. fixed seat; 4. support rod; 41. swivel seat; 42. locking collar; 5. one-way locking mechanism; 51. gear; 52. one-way locking rod; 53. toggle slider; 54. locking spring; 6. anti-drop cover; 7. self-locking seat; 8. insertion rod; 9. slot; 10. compression spring slider; 11. self-locking spring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1-Figure 4The cam 3 is a kind of fire-fighting ladder with anti-swaying function, and the cam 3 has the advantages of being easy to operate and can be used for the fire-fighting of fire-fighting. As shown in the figure, an anti-sway fire-fighting ladder comprises an outer ladder 1 and an inner ladder 2 slidably connected to the inner part of the outer ladder 1. The outer surfaces of both sides of the outer ladder 1 are fixedly connected to the fixing seats 3, and the inner surfaces of the fixing seats 3 are rotatably connected to the support rods 4. The interior of the fixing seats 3 is provided with a one-way locking mechanism 5, and the one-way locking mechanism 5 comprises a gear 51 fixedly connected to the front surface of the upper end of the support rod 4, and the interior of the fixing seat 3 is slidably connected to the one-way locking rod 52. The outer surface of the one-way locking rod 52 extends to the front surface of the fixing seat 3 and is fixedly connected to the toggle slider 53. The outside of the one-way locking rod 52 is provided with a locking spring 54. The interior of the fixing seat 3 is provided with a limiting sliding groove for the one-way locking rod 52 to slide. The one-way locking rod 52 is of rectangular design to prevent itself from rotating. The plug-in end of the one-way locking rod 52 is of single-sided chamfer design to achieve a one-way arbitrary sliding effect. The position away from the fixed seat 3 is fixedly connected with a swivel seat 41, and the inner surface of the swivel seat 41 is rotatably connected with a locking ring 42, and the inner surface of the locking ring 42 is bonded with an anti-slip pad. When the outer ladder 1 is erected, the locking ring 42 inside the swivel seat 41 can be rotated to release the locking effect of the locking ring 42 on the support rod 4, and the support rod 4 is rotated to make one end of it touch the ground. When the support rod 4 rotates downward, the gear 51 can toggle the one-way locking rod 52 to compress the locking spring 54. When the support rod 4 rotates upward, the one-way locking rod 52 with a single chamfer can prevent the gear 51 from rotating in the opposite direction to achieve a better support locking effect. At this time, the toggle slider 53 is toggled to compress the locking spring 54, so that the one-way locking rod 52 can be disengaged from the teeth of the gear 51, so that the support rod 4 can be attached to the outer ladder 1 for retraction. After retraction, the locking ring 42 is sleeved on one end of the support rod 4 to prevent the support rod 4 from accidentally unfolding.

[0023] like Figure 2 , Figure 4 and Figure 5 As shown, an anti-drop cover plate 6 is fixedly connected to the upper end of the outer ladder 1 , and self-locking seats 7 are fixedly connected to the outer surfaces of both sides of the outer ladder 1 above the rotating seat 41 .

[0024] Furthermore, the self-locking seat 7 is internally slidably connected to a plug rod 8, and the outer surfaces on both sides of the inner ladder 2 are provided with a plurality of slots 9. One end of the plug rod 8 is fixedly connected to a fixed block, which can facilitate the operator to pull the plug rod 8. The plug rod 8 is of rectangular design, and a square groove for the plug rod 8 to slide is provided inside the self-locking seat 7 to prevent itself from rotating. The plug-in end of the plug rod 8 is a single-sided chamfered design, which can achieve an arbitrary one-way sliding effect.

[0025] Furthermore, a compression spring slider 10 is fixedly connected to the outer surface of the insertion rod 8 , a self-locking spring 11 is provided on the right outer surface of the compression spring slider 10 , and the self-locking spring 11 is sleeved on the outer surface of the insertion rod 8 .

[0026] Working principle: When using the anti-sway fire ladder, first, when setting up the outer ladder 1, the locking ring 42 inside the swivel seat 41 can be rotated to release the locking effect of the locking ring 42 on the support rod 4, and the support rod 4 can be rotated to make one end of it touch the ground. When the support rod 4 rotates downward, the gear 51 can toggle the one-way locking rod 52 to compress the locking spring 54. When the support rod 4 rotates upward, the one-way locking rod 52 with a single chamfer can prevent the gear 51 from rotating in the opposite direction to achieve a better support locking effect. At this time, the toggle slider 53 is toggled to compress the locking spring 54, so that the one-way locking rod 52 can be disengaged from the teeth of the gear 51, and the support rod 4 can be released. The support rod 4 is fitted with the outer ladder 1 for retraction. After retraction, the locking ring 42 is sleeved on one end of the support rod 4 to prevent the support rod 4 from accidentally unfolding. When pulling the ladder, the inner ladder 2 slides upward inside the outer ladder 1. During the sliding process, the inner ladder 2 can move the plug rod 8 to achieve an arbitrary sliding effect. After being pulled to the specified position, the plug rod 8 can be clamped in the inside of the slot 9 to prevent the inner ladder 2 from sliding down. This design can achieve a better self-locking effect. When retracting the inner ladder 2, pull out the plug rod 8 to drive the compression spring slider 10 to compress the self-locking spring 11, so that the plug rod 8 can be disengaged from the inside of the slot 9, completing the function of retracting the inner ladder 2. This is the working principle of the anti-sway fire-fighting ladder.

Claims

1. An anti-sway fire fighting ladder, comprising an outer ladder (1) and an inner ladder (2) slidably connected to the inner part of the outer ladder (1), characterized in that: The outer surfaces of both sides of the outer ladder (1) are fixedly connected to a fixing seat (3), the inner surface of the fixing seat (3) is rotatably connected to a support rod (4), a one-way locking mechanism (5) is arranged inside the fixing seat (3), the one-way locking mechanism (5) comprises a gear (51) fixedly connected to the front surface of the upper end of the support rod (4), a one-way locking rod (52) is slidably connected inside the fixing seat (3), the outer surface of the one-way locking rod (52) extends to the front surface of the fixing seat (3) and is fixedly connected to a toggle slider (53), and a locking spring (54) is arranged outside the one-way locking rod (52).

2. The anti-sway fire ladder according to claim 1, characterized in that: The outer surfaces of both sides of the outer ladder (1) are fixedly connected to a rotating seat (41) at positions away from the fixed seat (3), and the inner surface of the rotating seat (41) is rotatably connected to a locking collar (42).

3. The anti-sway fire ladder according to claim 1, characterized in that: The upper end of the outer ladder (1) is fixedly connected to an anti-drop cover plate (6), and the outer surfaces on both sides of the outer ladder (1) are fixedly connected to self-locking seats (7) at positions above the rotating seat (41).

4. The anti-sway fire ladder according to claim 3, characterized in that: The interior of the self-locking seat (7) is slidably connected with an insertion rod (8), and the outer surfaces of both sides of the inner ladder (2) are provided with a plurality of locking grooves (9).

5. The anti-sway fire ladder according to claim 4, characterized in that: The outer surface of the insertion rod (8) is fixedly connected to a compression spring slider (10), and the right outer surface of the compression spring slider (10) is provided with a self-locking spring (11), and the self-locking spring (11) is sleeved on the outer surface of the insertion rod (8).

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