A folding fire escape ladder angle lock

Abstract

The utility model provides a folding fire ladder angle locking device relates to folding fire ladder technical field, including connecting plate, the surface rotation of connecting of connecting plate has the upper ladder frame, the surface of upper ladder frame is hinged with the lower ladder frame, angle adjusting locking device, angle adjusting locking device includes the adjusting screw rod rotation connection in the surface of connecting plate, the cambered surface screw thread connection of adjusting screw rod has the adjusting plate, the surface rotation of adjusting plate is connected with a plurality of adapter rod, angle adjusting locking device still includes U type connecting frame, U type connecting frame and upper ladder frame fixed connection, U type connecting frame and adapter rod rotation connection. The utility model has solved the ladder open angle fixed, when using fire ladder in the narrow space, fire ladder will because angle can't adjust, open angle is not fixed and leads to the situation that fire ladder is placed unstable, is easy to lead to the problem that fireman falls when climbing the ladder.

Description

Technical Field

[0001] This utility model relates to the field of folding fire ladder technology, specifically to a folding fire ladder angle locker. Background Technology

[0002] Folding fire ladders are portable fire rescue equipment that can be folded and stored. There are many types of folding fire ladders, such as A-frame ladders and telescopic ladders. Different types of folding fire ladders can be used depending on the actual rescue situation. Folding fire ladders are mainly used for emergency rescue, material transportation, and daily emergency scenarios such as personnel evacuation during traffic jams. They have the characteristics and advantages of being lightweight, small in size, and easy to carry.

[0003] When firefighters need to climb to higher places for rescue operations, they need to use ladders to assist in the climb. For ease of carrying, firefighters will carry folding fire ladders to assist in the climb. Because the structure of folding fire ladders is fixed and the opening and closing angle of the ladder is fixed, when using fire ladders in confined spaces, the fire ladder will be unstable because the angle cannot be adjusted and the opening and closing angle is not fixed, which may cause the fire ladder to tip over when firefighters are climbing the ladder. Utility Model Content

[0004] This utility model provides a foldable fire ladder angle locker that solves the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] An embodiment of this utility model provides a folding fire ladder angle locker, comprising:

[0007] A connecting plate, wherein an upper ladder frame is rotatably connected to the surface of the connecting plate, and a lower ladder frame is hinged to the surface of the upper ladder frame;

[0008] An angle adjustment and locking device includes an adjusting screw rotatably connected to the surface of a connecting plate, an adjusting plate being threaded onto the arc surface of the adjusting screw, and multiple adapter rods being rotatably connected to the surface of the adjusting plate.

[0009] Furthermore, the angle adjustment and locking device also includes a U-shaped connecting frame, which is fixedly connected to the upper ladder frame and rotatably connected to the adapter rod.

[0010] Furthermore, the inner walls of the upper and lower ladders are fixedly connected with reinforcing blocks, and pins are detachably installed on the surfaces of the upper and lower ladders, with the pins penetrating the reinforcing blocks.

[0011] Furthermore, a support rod is slidably connected to the inner wall of the adjusting screw, and a support plate is fixedly connected to the end of the support rod.

[0012] Furthermore, the inner wall of the adjusting screw is slidably connected with a fixing pin, the surface of the support rod is provided with multiple positioning holes, and the bottom surface of the support rod is provided with a fixing hole. The dimensions of the positioning holes and the fixing holes are adapted to the dimensions of the fixing pin.

[0013] Furthermore, a pull plate is fixedly connected to the end of the fixing pin, a spring is fixedly connected to the surface of the pull plate, and the other end of the spring is fixedly connected to the adjusting screw.

[0014] Furthermore, an anti-slip sleeve is fixedly connected to the arc surface of the adjusting screw, and the anti-slip sleeve is made of rubber.

[0015] Furthermore, a limit block is fixedly connected to the surface of the adjusting screw.

[0016] The above-described solution of this utility model has at least the following beneficial effects:

[0017] This invention features an angle locking device. By rotating the adjusting screw, the adjusting plate moves up and down, changing the folding angle of the adapter rod, thereby adjusting the opening and closing angle of the ladder. The adjusting screw has a self-locking characteristic, and after adjustment, the opening and closing angle of the ladder is fixed, allowing the ladder to be opened and closed at multiple angles and locked, adapting to different work scenarios. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a utility model Figure 1 A schematic diagram of the unfolded structure;

[0020] Figure 3 This is a schematic diagram of the angle adjustment and locking device of this utility model;

[0021] Figure 4 This is a utility model Figure 3 A magnified structural diagram at point A;

[0022] Figure 5 This is a utility model Figure 2 A magnified structural diagram at point B.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Upper ladder frame; 2. Lower ladder frame; 3. Connecting plate; 4. Angle adjustment and locking device; 41. Adjusting screw; 411. Support rod; 412. Support plate; 413. Limiting block; 414. Anti-slip sleeve; 42. Adjusting plate; 421. Adapter rod; 422. U-shaped connecting frame; 43. Pull plate; 431. Fixing pin; 432. Spring; 433. Positioning hole; 434. Fixing hole; 5. Pin; 51. Reinforcing block. Detailed Implementation

[0025] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0026] like Figures 1 to 5 As shown, an embodiment of this utility model provides a folding fire ladder angle locker, including: a connecting plate 3, an upper ladder frame 1 rotatably connected to the surface of the connecting plate 3, and a lower ladder frame 2 hinged to the surface of the upper ladder frame 1; an angle adjustment and locking device 4, the angle adjustment and locking device 4 including an adjusting screw 41 rotatably connected to the surface of the connecting plate 3, an adjusting plate 42 threadedly connected to the arc surface of the adjusting screw 41, and a plurality of adapter rods 421 rotatably connected to the surface of the adjusting plate 42.

[0027] like Figures 1 to 5 As shown, a connecting plate 3 is rotatably connected to an upper ladder frame 1, and a lower ladder frame 2 is hinged to the surface of the upper ladder frame 1. During fire rescue, when it is necessary to use the fire ladder to climb to a higher place, the fire rescue personnel take out the fire ladder and unfold it along the connecting plate 3. The lower ladder frame 2 at the bottom of the upper ladder frame 1 is rotated, so that the upper ladder frame 1 and the lower ladder frame 2 are parallel and connected. The inner walls of the upper ladder frame 1 and the lower ladder frame 2 are fixedly connected to a reinforcing block 51. The surfaces of the upper ladder frame 1 and the lower ladder frame 2 are detachably installed with pins 5. The pins 5 pass through the reinforcing block 51. The pins 5 are inserted into the reinforcing block 51 between the upper ladder frame 1 and the lower ladder frame 2 for fixation, thereby unfolding the folding fire ladder for use.

[0028] like Figures 3 to 4As shown, the angle adjustment and locking device 4 includes an adjusting screw 41 rotatably connected to the surface of the connecting plate 3. An adjusting plate 42 is threadedly connected to the arc-shaped surface of the adjusting screw 41. Multiple adapter rods 421 are rotatably connected to the surface of the adjusting plate 42. When the fire ladder is deployed, firefighters rotate the adjusting screw 41, causing the adjusting plate 42 to move downwards, thereby opening and closing the upper ladder frame 1 and lower ladder frame 2 on both sides, adjusting the opening angle between the upper ladder frame 1 and the connecting plate 3. After the adjustment screw 41 is stopped, the opening angle between the upper ladder frame 1 and the connecting plate 3 is fixed, and the distance between the lower ladder frames 2 on both sides of the bottom is fixed. The angle adjustment locking device 4 also includes a U-shaped connecting frame 422, which is fixedly connected to the upper ladder frame 1 and rotatably connected to the adapter rod 421. The adjustment of the adjustment screw 41 allows for a multi-level adjustment of the opening angle between the upper ladder frames 1 on both sides from 0 to 15 degrees, thus enabling the fire ladder to be placed stably in crowded spaces.

[0029] like Figure 3 As shown, a support rod 411 is slidably connected to the inner wall of the adjusting screw 41, and a support plate 412 is fixedly connected to the end of the support rod 411. The support plate 412 is in contact with the ground and can support the center part of the fire ladder, improve the stability of the support, and thus effectively improve the stability of the fire ladder in use.

[0030] like Figure 4 As shown, a fixing pin 431 is slidably connected to the inner wall of the adjusting screw 41. Multiple positioning holes 433 are opened on the surface of the support rod 411, and a fixing hole 434 is opened on the bottom surface of the support rod 411. The dimensions of the positioning holes 433 and the fixing holes 434 are adapted to the dimensions of the fixing pin 431. The fixing pin 431 is disengaged from the fixing hole 434 by the pull plate 43. At this time, the support rod 411 will slide out of the adjusting screw 41 until the bottom support plate 412 falls to the ground. At this time, the spring 432 contracts and drives the fixing pin 431 to be inserted into the positioning hole 433 to fix the support rod 411. Since the positioning hole 433 is opened to support the support rod 411, in order to stabilize the support, after the fixing pin 431 is inserted into the fixing hole 434, the adjusting screw 41 needs to be slightly adjusted so that the support plate 412 is in contact with the ground.

[0031] like Figure 4 As shown, a pull plate 43 is fixedly connected to the end of the fixing pin 431, and a spring 432 is fixedly connected to the surface of the pull plate 43. The other end of the spring 432 is fixedly connected to the adjusting screw 41. When the pull plate 43 is pulled, the spring 432 is in a stretched state. When the fixing pin 431 is inserted into the positioning hole 433 or the fixing hole 434, the spring 432 will limit the fixing pin 431, so that the fixing pin 431 is stably inserted into the fixing hole 434 or the positioning hole 433.

[0032] like Figure 3 As shown, an anti-slip sleeve 414 is fixedly connected to the arc surface of the adjusting screw 41. The anti-slip sleeve 414 is made of rubber. When firefighters rotate the adjusting screw 41, they rotate the adjusting screw 41 by holding the anti-slip sleeve 414 on the surface of the adjusting screw 41. The rubber anti-slip sleeve 414 is relatively soft and fits the palm better, thus facilitating adjustment.

[0033] like Figure 3 As shown, a limit block 413 is fixedly connected to the surface of the adjusting screw 41. Since the adjusting screw 41 and the adjusting plate 42 are adjusted by a threaded connection, there will be wear between the threads. In the case of excessive wear, the adjusting plate 42 and the adjusting screw 41 will separate, and the adjusting plate 42 will fall to the position of the limit block 413 to prevent the fire ladder from collapsing.

[0034] Working principle: When conducting fire rescue, it is necessary to use a fire ladder to climb to a high place. At this time, the fire rescue personnel take out the fire ladder and unfold it along the connecting plate 3. Rotate the lower ladder 2 at the bottom of the upper ladder frame 1. At this time, the upper ladder frame 1 and the lower ladder frame 2 are parallel and connected. Insert the pin 5 into the reinforcing block 51 between the upper ladder frame 1 and the lower ladder frame 2 for fixation, thereby unfolding the folding fire ladder for use.

[0035] When the fire ladder needs to be deployed, firefighters rotate the adjusting screw 41, causing the adjusting plate 42 to move downwards. This, in turn, causes the connecting rod 421 to open and close the upper ladder frame 1 and lower ladder frame 2 on both sides, adjusting the opening angle between the upper ladder frame 1 and the connecting plate 3. After stopping the rotation of the adjusting screw 41, the opening angle between the upper ladder frame 1 and the connecting plate 3 is fixed, and the distance between the lower ladder frames 2 on both sides at the bottom is also fixed. By adjusting the adjusting screw 41, the opening angle between the upper ladder frames 1 on both sides can be adjusted from 0 to 15 degrees in multiple increments, allowing the fire ladder to be stably placed in congested areas. It can then be extended using the pull plate. 43 drives the fixing pin 431 to disengage from the fixing hole 434. At this time, the support rod 411 will slide out of the adjusting screw 41 until the bottom support plate 412 falls to the ground. At this time, the spring 432 contracts and drives the fixing pin 431 to insert into the positioning hole 433 to fix the support rod 411. The support plate 412 is in contact with the ground, which can support the center part of the fire ladder, reduce the load on the upper ladder frame 1 and lower ladder frame 2 on both sides, and improve the service life of the fire ladder to a certain extent. Heavy objects can be placed on the support plate 412 as counterweights to improve the stability of the center of gravity and prevent the adjusting screw 41 from being accidentally rotated.

[0036] When the fire ladder is folded up for storage and transport, the adapter rod 421 is located inside the U-shaped connecting frame 422, and the upper ladder frame 1 and the lower ladder frame 2 are parallel and close together. The folded fire ladder can be tied and fixed with a binding rope to prevent the lower ladder frames 2 on both sides from rotating at will. Limiting blocks 413 are also provided on the upper and lower sides of the thread of the adjusting screw 41. Dust covers can be added to the thread of the adjusting screw 41 to protect it from dust or foreign objects accumulating in the thread, which may cause the adjusting screw 41 to jam when rotating. The ends of the pin 5 and the fixing pin 431 are chamfered to facilitate insertion into the through hole.

[0037] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A folding fire ladder angle locker, characterized in that, include: A connecting plate (3) is rotatably connected to an upper ladder frame (1), and a lower ladder frame (2) is hinged to the surface of the upper ladder frame (1). Angle adjustment and locking device (4) includes an adjustment screw (41) rotatably connected to the surface of the connecting plate (3), an adjustment plate (42) is threadedly connected to the arc surface of the adjustment screw (41), and a plurality of adapter rods (421) are rotatably connected to the surface of the adjustment plate (42).

2. The folding fire ladder angle locker according to claim 1, characterized in that, The angle adjustment and locking device (4) further includes a U-shaped connecting frame (422), which is fixedly connected to the upper ladder frame (1) and rotatably connected to the adapter rod (421).

3. A folding fire ladder angle locker according to claim 1, characterized in that, The inner walls of the upper ladder frame (1) and the lower ladder frame (2) are fixedly connected with reinforcing blocks (51), and pins (5) are detachably installed on the surfaces of the upper ladder frame (1) and the lower ladder frame (2), with the pins (5) penetrating the reinforcing blocks (51).

4. A folding fire ladder angle locker according to claim 2, characterized in that, The inner wall of the adjusting screw (41) is slidably connected to a support rod (411), and the end of the support rod (411) is fixedly connected to a support plate (412).

5. A folding fire ladder angle locker according to claim 4, characterized in that, The inner wall of the adjusting screw (41) is slidably connected to a fixing pin (431), the surface of the support rod (411) is provided with multiple positioning holes (433), the bottom surface of the support rod (411) is provided with a fixing hole (434), and the size of the positioning hole (433) and the fixing hole (434) is adapted to the size of the fixing pin (431).

6. A folding fire ladder angle locker according to claim 5, characterized in that, The end of the fixing pin (431) is fixedly connected to a pull plate (43), and the surface of the pull plate (43) is fixedly connected to a spring (432). The other end of the spring (432) is fixedly connected to the adjusting screw (41).

7. A folding fire ladder angle locker according to claim 4, characterized in that, The arc surface of the adjusting screw (41) is fixedly connected to an anti-slip sleeve (414), which is made of rubber.

8. A folding fire ladder angle locker according to claim 4, characterized in that, The adjusting screw (41) is fixedly connected to a limiting block (413).

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