Folding fire fighting truck ladder stand

Abstract

The utility model relates to a folding fire fighting truck ladder stand which comprises a long ladder section, a short ladder section and a hinge connector which are fixedly arranged on a fire fighting truck, the hinge connector comprises an inner cover part, an outer cover part and a control module, the inner cover part is rotatably connected with the outer cover part, the inner cover part is connected with the long ladder section, and the outer cover part is connected with the short ladder section; the control module comprises a movable block, the movable block is movably arranged on the outer cover part, and an unfolded state locking clamping groove and a folded state locking clamping groove are formed in the inner cover part; when the short ladder sections and the long ladder sections are mutually unfolded, the movable blocks are arranged in the unfolded state locking clamping grooves, and when the short ladder sections and the long ladder sections are mutually folded, the movable blocks are arranged in the folded state locking clamping grooves. When the short ladder sections are rotated and folded, the short ladder sections can be tightly attached to the long ladder sections, and the movable blocks are firmly locked in the locking clamping grooves in the folding state, so that the folding state of the short ladder sections is locked, the whole structure is greatly contracted, and the occupied space is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a folding fire engine ladder. BACKGROUND

[0002] The fire engine ladder system plays a key role in fire rescue and provides a quick and safe way for firefighters to climb.

[0003] Traditional fire engine ladders mostly adopt fixed structures or simple folding designs, which can meet basic use requirements but have problems such as large size, inconvenient operation, and large storage space occupation.

[0004] For example, in the traditional folding ladder design, the ladder is often adjusted to the appropriate climbing angle by setting a cushion block when it is unfolded, but due to the lack of a reliable locking mechanism, the angle is unstable or the position is offset due to external interference; and during storage, a lock catch structure is usually used to achieve locking, which is not only cumbersome to operate, but also not firm enough, and may have safety hazards after long-term use. SUMMARY

[0005] The utility model aims to provide a folding fire engine ladder that can provide stable support when unfolded and maintain a compact, safe, and reliable structure when folded.

[0006] The utility model is achieved as follows:

[0007] A folding fire engine ladder includes a long ladder section, a short ladder section, and a hinge connector fixedly installed on a fire engine, the hinge connector includes an inner cover, an outer cover, and a control module, the inner cover and the outer cover are rotationally connected, the inner cover is connected to the long ladder section, and the outer cover is connected to the short ladder section.

[0008] The control module includes a movable block, the movable block is movably arranged on the outer cover, and the inner cover is provided with an unfolded state locking slot and a folded state locking slot.

[0009] When the short ladder section and the long ladder section are unfolded, the movable block is placed in the unfolded state locking slot, and when the short ladder section and the long ladder section are folded, the movable block is placed in the folded state locking slot.

[0010] When the short ladder section is rotated and folded, the short ladder section can be tightly attached to the long ladder section and is firmly locked in the folded state locking slot through the movable block, thereby locking the folded state of the short ladder section, greatly shrinking the overall structure, reducing the occupied space, and facilitating the storage and transportation of equipment on the fire engine.

[0011] When the short ladder section and the long ladder section are unfolded to form the fire truck ladder, the movable block is firmly locked in the unfolded state locking slot, so that the unfolded state of the short ladder section is locked, a suitable climbing structure is quickly and stably formed, and the needs of the firefighters for quick climbing operation in emergency rescue are met.

[0012] The purpose of the utility model can also be solved by the following technical measures:

[0013] Further, the control module comprises an unlocking piece and a first spring for controlling the movement of the movable block, the unlocking piece is arranged in the outer cover portion in a rotating manner, the first spring is arranged in the inner cavity of the outer cover portion, one end of the first spring abuts against the inner wall of the outer cover portion, and the other end of the first spring abuts against the movable block, and the first spring constitutes a reset mechanism of the movable block.

[0014] The elastic force of the first spring maintains the state that the movable block is arranged in the unfolded state locking slot or the folded state locking slot, when a user needs to unlock, the user rotates the unlocking piece, the unlocking piece overcomes the elastic force of the first spring, and the movable block is driven away from the unfolded state locking slot or the folded state locking slot, and quick unlocking is realized. This design simplifies the operation process, state conversion can be quickly performed in an emergency, and the emergency response efficiency of the fire truck ladder is improved.

[0015] Further, the anti-locking and anti-loosening device comprises a swing arm and a second spring, the swing arm is arranged in the inner cover portion in a rotating manner, the swing arm is provided with a first pressing portion and a second pressing portion, the second spring is arranged in the inner cavity of the inner cover portion, one end of the second spring abuts against the inner wall of the inner cover portion, and the other end of the second spring abuts against the swing arm, and the second spring constitutes a reset mechanism of the swing arm.

[0016] When the movable block is in the state of being out of the folded state locking slot, the first pressing portion of the swing arm enters the folded state locking slot, the movable block is prevented from entering the folded state locking slot again, so that both hands are released, both hands do not need to continuously hold the unlocking piece, the movable block is also prevented from entering the folded state locking slot again, both hands are easily rotated from the side away from the connector, and more labor is saved.

[0017] When the short ladder section is completely unfolded, the movable block enters the unfolded state locking slot, the second spring continuously applies pressure to the swing arm, the second pressing portion of the swing arm abuts against the movable block, and the movable block is effectively prevented from loosening due to vibration or external impact.

[0018] The utility model has the advantages of the following:

[0019] The utility model discloses, adopt the control module of movable block and the outer cover part of inside cover part, through respectively in inside cover part design unfolding state locking groove and folding state locking groove, realized reliable locking of inside and outside cover part when short ladder section rotates and unfolds or folds, thereby ensure that the structure of fire engine ladder stand is stable when using, greatly improved the use security.

[0020] The utility model discloses, the elastic force of first spring maintains the state of pushing movable block to be placed in unfolding state locking groove or folding state locking groove, when the user needs to unlock, the user rotates the unlocking sheet, and the unlocking sheet overcomes the elastic force of first spring, can drive movable block to be away from unfolding state locking groove or folding state locking groove, realizes quick unlocking. This design simplifies the operation process, can rapidly carry out state conversion under the emergency, improves the emergency response efficiency of fire engine ladder stand.

[0021] The utility model discloses when movable block is in the state of being out of folding state locking groove, the first pressing part of swing arm enters folding state locking groove, prevents movable block from entering folding state locking groove again, thereby liberating both hands, and both hands do not need to continuously hold the unlocking sheet, and also can prevent movable block from entering folding state locking groove again, and both hands rotate short ladder section from the side of being far away from connector easily, and it is more labor-saving.

[0022] The utility model discloses when short ladder section rotates and unfolds completely, when movable block enters unfolding state locking groove, the elastic force of second spring pushes the second pressing part of swing arm and leans on movable block, forms a multiple locking structure. This design significantly enhances the fixing effect between inside cover part and outer cover part, effectively prevents loosening due to vibration or external force, ensures the safety and stability of ladder stand in the use process. ACCURACY OF DRAWINGS

[0023] Figure 1 It is the schematic diagram of fire engine ladder stand (folding state).

[0024] Figure 2 It is the schematic diagram of hinge connector (folding state).

[0025] Figure 3 It is the sectional view of hinge connector (folding state).

[0026] Figure 4 It is the schematic diagram of hinge connector (folding state, unlocking sheet rotation).

[0027] Figure 5 It is the sectional view of hinge connector (folding state, unlocking sheet rotation).

[0028] Figure 6 It is the assembly drawing of hinge connector.

[0029] Figure 7is an exploded view of the hinge connector.

[0030] Figure 8 is a schematic view of the fire truck ladder (unfolded state).

[0031] Figure 9 is a schematic view of the hinge connector (unfolded state).

[0032] Figure 10 is a sectional view of the hinge connector (unfolded state).

[0033] Figure 11 is a schematic view of the hinge connector (unfolded state, lock release piece rotation).

[0034] Figure 12 is a sectional view of the hinge connector (unfolded state, lock release piece rotation).

[0035] Figure 13 is a schematic view of the hinge connector (unfolded state, removal of part of the outer cover portion and the inner cover portion). DETAILED DESCRIPTION

[0036] The utility model will be further described in connection with the drawings and embodiments:

[0037] Embodiments, in connection with Figures 1 to 13 As shown in the figure, a folding fire truck ladder comprises a long ladder section 1, a short ladder section 2 and a hinge connector 3 fixedly installed on a fire truck, the hinge connector 3 comprises an inner cover portion 4, an outer cover portion 5 and a control module 6, the inner cover portion 4 and the outer cover portion 5 are rotationally connected, the inner cover portion 4 is connected to the long ladder section 1, and the outer cover portion 5 is connected to the short ladder section 2.

[0038] The control module 6 comprises a movable block 61, the movable block 61 is movably arranged on the outer cover portion 5, and the inner cover portion 4 is provided with an unfolded state locking slot 41 and a folded state locking slot 42.

[0039] Further, the control module 6 further comprises a lock release piece 62 for controlling the movement of the movable block, and the lock release piece 62 is rotationally arranged on the outer cover portion 5.

[0040] Further, the control module 6 comprises a lock release piece 62 and a first spring 63 for controlling the movement of the movable block 61, the lock release piece 62 is rotationally arranged on the outer cover portion 5, the first spring 63 is arranged in the inner cavity of the outer cover portion 5, one end of the first spring 63 abuts against the inner wall of the outer cover portion 5, the other end of the first spring 63 abuts against the movable block 61, and the first spring 63 constitutes a reset mechanism of the movable block 61.

[0041] Further, the anti-locking and anti-loosening device 7 is further included, the anti-locking and anti-loosening device 7 includes a swing arm 71 and a second spring 72, the swing arm 71 is arranged in a rotating manner in the inner cover part 4, the swing arm 71 is provided with a first pressing part 710 and a second pressing part 711, the second spring 72 is placed in the inner cavity of the inner cover part 4, one end of the second spring 72 abuts against the inner wall of the inner cover part 4, the other end of the second spring 72 abuts against the swing arm 71, and the second spring 72 constitutes a reset mechanism of the swing arm 71.

[0042] The short ladder section 2 is unfolded, and the short ladder section 2 and the long ladder section 1 form the ladder of the fire truck:

[0043] Firstly, the user rotates the unlocking sheet 62 to unlock, the unlocking sheet 62 pushes the movable block 61 to move against the elastic force of the first spring 63, the movable block 61 is out of the folding state locking slot 42, the elastic force of the second spring 72 pushes the swing arm 71 to rotate, and the first pressing part 710 of the swing arm 71 enters the folding state locking slot 42.

[0044] Then, the user pushes the short ladder section 2 to rotate until the short ladder section 2 is completely unfolded, at this time, the movable block 61 is aligned with the unfolding state locking slot 41, the elastic force of the first spring 63 pushes the movable block 61, the movable block 61 pushes the second pressing part 711 against the elastic force of the second spring 72 to move, thereby pushing the swing arm 71 to rotate, the second pressing part 711 of the swing arm 71 is away from the unfolding state locking slot 41, and finally the movable block 61 enters the unfolding state locking slot 41, the position of the inner cover part 4 and the outer cover part 5 is locked by the movable block 61, and the swing arm 71 is rotated by the elastic force of the second spring 72, so that the second pressing part 711 abuts against the movable block 61 to prevent the movable block 61 from being loosened.

[0045] The short ladder section 2 is folded, and the short ladder section 2 is close to the long ladder section 1:

[0046] Firstly, the user rotates the unlocking sheet 62 to unlock, the unlocking sheet 62 pushes the movable block 61 to move against the elastic force of the first spring 63, the movable block 61 is out of the folding state locking slot 42, the elastic force of the second spring 72 pushes the swing arm 71 to rotate, and the first pressing part 710 of the swing arm 71 enters the folding state locking slot 42.

[0047] Then, the user pushes the short ladder section 2 to rotate until the short ladder section 2 is completely folded, at this time, the movable block 61 is aligned with the folding state locking slot 42, the elastic force of the first spring 63 pushes the movable block 61, the movable block 61 pushes the first pressing part 710 against the elastic force of the second spring 72 to move, thereby pushing the swing arm 71 to rotate, the first pressing part 710 of the swing arm 71 is away from the folding state locking slot 42, and finally the movable block 61 enters the folding state locking slot 42, the position of the inner cover part 4 and the outer cover part 5 is locked by the movable block 61.

Claims

1. A folding fire truck ladder comprising a long ladder section, a short ladder section and a hinge connector fixedly mounted to a fire truck, characterized in that: The hinge connector comprises an inner cover, an outer cover and a control module, the inner cover and the outer cover are rotationally connected, the inner cover is connected with a long ladder section, and the outer cover is connected with a short ladder section; The control module comprises a movable block, the movable block is movably arranged on the outer cover, and the inner cover is provided with an unfolded state locking slot and a folded state locking slot; When the short ladder section and the long ladder section are unfolded, the movable block is arranged in the unfolded state locking slot, and when the short ladder section and the long ladder section are folded, the movable block is arranged in the folded state locking slot.

2. The folding fire apparatus ladder of claim 1, wherein: The control module comprises an unlocking piece and a first spring for controlling the movement of the movable block, the unlocking piece is rotationally arranged on the outer cover, the first spring is arranged in the inner cavity of the outer cover, one end of the first spring abuts against the inner wall of the outer cover, the other end of the first spring abuts against the movable block, and the first spring constitutes a reset mechanism of the movable block.

3. A folding fire apparatus ladder as defined in claim 1 or 2 wherein: The locking and loosening prevention device comprises a swing arm and a second spring, the swing arm is rotationally arranged on the inner cover, the swing arm is provided with a first pressing portion and a second pressing portion, the second spring is arranged in the inner cavity of the inner cover, one end of the second spring abuts against the inner wall of the inner cover, the other end of the second spring abuts against the swing arm, and the second spring constitutes a reset mechanism of the swing arm.

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