Foldable ladder stand for elevator maintenance

Abstract

The utility model relates to the technical field of foldable crawling ladders, and discloses a foldable crawling ladder for elevator maintenance, which comprises a main ladder and an auxiliary ladder, the auxiliary ladder is provided with an extension component and a limit control component for limiting the extension component, the foldable crawling ladder for elevator maintenance is characterized in that the extension component is arranged, and the limit control component is used for limiting the extension component. When the extension frame is pulled out, the pedal is not limited by the auxiliary ladder any more, under the action of the torsion spring, the pedal rotates at the position hinged to the extension frame, and the pedal stops swinging until the pedal abuts against the limiting plate, and at the moment, the pedal is in the state perpendicular to the extension frame and can be treaded by a worker for climbing; the pedal is propped against the auxiliary ladder, so that the pedal swings and resets towards the side far away from the limiting plate from the position hinged to the extension frame, and therefore, the requirements of different heights can be met while resetting is realized, the size is small, a worker can carry the ladder conveniently, and the practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to foldable ladder technology field, concretely is a kind of foldable ladder for elevator maintenance. BACKGROUND

[0002] After elevator installation is used, it needs to be maintained periodically, since elevator car has certain height, usually staff needs to use ladder to maintain operation to elevator, currently used foldable ladder, its length is certain, this leads to staff when coping with different height demand use, ladder is difficult to meet the demand, if directly selecting larger ladder, staff will be more troublesome when carrying, have certain disadvantages, for this, we propose a kind of foldable ladder for elevator maintenance. UTILITY MODEL CONTENTS

[0003] The utility model is to provide a kind of foldable ladder for elevator maintenance, to solve the problem in the background art described above.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of foldable ladder for elevator maintenance, including main ladder and vice ladder, the main ladder and vice ladder are hinged, the vice ladder is provided with extension assembly and the limiting control component for limiting extension assembly;

[0005] The extension assembly includes:

[0006] Extension frame, extension frame is used to lengthen the length of vice ladder to cope with different height demand;

[0007] Pedal board, pedal board is used for staff to climb and step on;

[0008] Limiting plate, limiting plate is used to limit pedal board, so that pedal board can only be rotated to the state of being perpendicular to extension frame;

[0009] Torsion spring, torsion spring is used to control pedal board to automatically unfold.

[0010] Preferably, the extension frame is connected to the auxiliary ladder and extends away from one end of the main ladder, and the extension frame is hingedly connected to a side of the auxiliary ladder close to the center of the auxiliary ladder, and a stepping plate is hingedly connected to a side of the extension frame close to the stepping plate, and a limiting plate and a torsion spring are fixed to a side of the extension frame close to the stepping plate, and one end of the torsion spring away from the extension frame is fixed to the stepping plate, and when the extension frame is pulled out, the stepping plate is no longer limited by the auxiliary ladder, and under the action of the torsion spring, the stepping plate rotates at the hinged position with the extension frame, until the stepping plate is stopped by the limiting plate, and the stepping plate is in a state perpendicular to the extension frame, and the staff can step on the stepping plate to climb, and when the extension frame is pulled into the auxiliary ladder, the stepping plate is stopped by the auxiliary ladder, and the stepping plate swings away from the limiting plate at the hinged position with the extension frame, so as to reset, and the extension frame has a small size and can meet the needs of different heights, and the staff can conveniently carry the extension frame, and the extension frame has high practicability.

[0011] Preferably, the limiting control assembly comprises a pressing rod, the pressing rod extends through the surface of the auxiliary ladder and is slidably connected to the auxiliary ladder, a reset spring is fixed to the inner wall of the auxiliary ladder, one end of the reset spring away from the auxiliary ladder is fixed to the surface of the pressing rod, a supporting rod is hingedly connected to the inner wall of the auxiliary ladder, a fixed rod is fixed to the inner wall of the auxiliary ladder, the fixed rod extends through a clamping block and is slidably connected to the clamping block, a connecting spring is fixed to a side of the clamping block close to the fixed rod, one end of the connecting spring away from the clamping block is fixed to the inner wall of the auxiliary ladder, and an inclined clamping tooth is fixed to a side of the extension frame close to the pressing rod, when the extension frame is pulled out of the auxiliary ladder, the inclined clamping tooth on the extension frame stops the clamping block and moves the clamping block close to the fixed rod, when the extension frame is forced to move into the auxiliary ladder, the inclined clamping tooth on the extension frame and the clamping block are clamped with each other, the extension frame is limited, the extension frame cannot be pulled into the auxiliary ladder, and the stability of the extension frame in use is ensured, when the extension frame needs to be pulled back, the pressing rod is pressed, the pressing rod stops the supporting rod at the hinged position with the auxiliary ladder, the supporting rod lifts the clamping block in the form of a lever, the clamping block moves away from the extension frame, the inclined clamping tooth and the clamping block are separated, the extension frame is limited, and the extension frame can be pulled into the auxiliary ladder, which is convenient for the staff to carry.

[0012] Preferably, the inner side of the main ladder is fixed with a connecting block, the connecting block can limit the auxiliary ladder, when the auxiliary ladder is rotated to be flat with the main ladder, the auxiliary ladder can be used as a normal ladder, the auxiliary ladder stops the wall and is stopped by the connecting block, the auxiliary ladder cannot be folded under the weight of the staff, and the stability of the auxiliary ladder is ensured.

[0013] Preferably, the main ladder and the auxiliary ladder are provided with a connecting hook, when the main ladder and the auxiliary ladder are used in a triangular shape, the connecting hook is hung on the main ladder and the auxiliary ladder, the angle between the main ladder and the auxiliary ladder is limited, and the stability of the main ladder and the auxiliary ladder used as a ladder is ensured.

[0014] Compared with the prior art, this utility model provides a foldable ladder for elevator maintenance, which has the following advantages:

[0015] 1. This foldable ladder for elevator maintenance, through its extension assembly, allows the foot pedal to be unrestricted by the auxiliary ladder when the extension frame is pulled out. Under the action of the torsion spring, the foot pedal rotates at the hinged position with the extension frame until it is stopped by the limiting plate. At this point, the foot pedal is perpendicular to the extension frame and can be stepped on by staff for climbing. When the extension frame is retracted into the auxiliary ladder, the foot pedal is stopped by the auxiliary ladder, causing it to swing back to the side away from the limiting plate at the hinged position with the extension frame, thus achieving reset. It is compact in size, can meet the needs of different heights, is easy for staff to carry, and is highly practical.

[0016] 2. The elevator maintenance uses a foldable ladder. When the extension frame is subjected to force and moves into the auxiliary ladder, the inclined locking teeth and locking blocks on the extension frame engage with each other to restrict the extension frame, preventing it from retracting into the auxiliary ladder and ensuring the stability of the extension frame during use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall front view of the present invention;

[0018] Figure 2 This is a cross-sectional view of the connection structure of the auxiliary ladder, extension component, and limit control component of this utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure between the extension component and the limit control component of this utility model;

[0020] Figure 4 This is a partial structural diagram of the extension component of this utility model.

[0021] In the diagram: 1. Main ladder; 2. Secondary ladder; 3. Extension assembly; 31. Extension frame; 32. Step; 33. Limiting plate; 34. Torsion spring; 4. Limit control assembly; 41. Pressing rod; 42. Return spring; 43. Support rod; 44. Fixing rod; 45. Locking block; 46. Connecting spring; 47. Inclined locking tooth; 5. Connecting block; 6. Connecting hook. Detailed Implementation

[0022] like Figures 1-4 As shown, this utility model provides a technical solution: a foldable ladder for elevator maintenance, including a main ladder 1 and an auxiliary ladder 2, the main ladder 1 and the auxiliary ladder 2 are hinged to each other, the auxiliary ladder 2 is provided with an extension component 3 and a limit control component 4 for restricting the extension component 3, the extension component 3 includes: an extension frame 31, a foot pedal 32, a limit plate 33 and a torsion spring 34.

[0023] The extension frame 31 is extended from one end of the auxiliary ladder 2 away from the main ladder 1, and the extension frame 31 is slidingly connected with the auxiliary ladder 2, a stepping plate 32 is hinged on one side of the extension frame 31 close to the center of the auxiliary ladder 2, a limiting plate 33 and a torsion spring 34 are fixed on one side of the extension frame 31 close to the stepping plate 32, one end of the torsion spring 34 away from the extension frame 31 is fixed with the stepping plate 32, when the extension frame 31 is pulled out, the stepping plate 32 is no longer limited by the auxiliary ladder 2, under the action of the torsion spring 34, the stepping plate 32 rotates at the hinged position with the extension frame 31, until the stepping plate 32 is abutted by the limiting plate 33, the stepping plate 32 stops swinging, at this time, the stepping plate 32 is in a state perpendicular to the extension frame 31, which can be stepped by the staff for climbing, when the extension frame 31 is retracted into the auxiliary ladder 2, the stepping plate 32 is abutted by the auxiliary ladder 2, so that the stepping plate 32 swings to reset at the hinged position away from the limiting plate 33, thereby realizing reset, which is small in size and can meet the needs of different heights, is convenient for the staff to carry, and is high in practicality.

[0024] The limiting control assembly 4 comprises a pressing rod 41 penetrating through the surface of the auxiliary ladder 2 and slidingly connected with the auxiliary ladder 2, a reset spring 42 is fixed on the inner wall of the auxiliary ladder 2, one end of the reset spring 42 away from the auxiliary ladder 2 is fixed on the surface of the pressing rod 41, a supporting rod 43 is hinged on the inner wall of the auxiliary ladder 2, a fixed rod 44 is fixed on the inner wall of the auxiliary ladder 2 and penetrates through a clamping block 45 and is slidingly connected with the clamping block 45, a connecting spring 46 is fixed on one side of the clamping block 45 close to the fixed rod 44, one end of the connecting spring 46 away from the clamping block 45 is fixed on the inner wall of the auxiliary ladder 2, an inclined clamping tooth 47 is fixed on one side of the extension frame 31 close to the pressing rod 41, when the extension frame 31 is pulled out from the auxiliary ladder 2, the inclined clamping tooth 47 on the extension frame 31 abuts on the clamping block 45 and pushes the clamping block 45 to move close to the fixed rod 44, when the extension frame 31 is forced to move into the auxiliary ladder 2, the inclined clamping tooth 47 on the extension frame 31 and the clamping block 45 are mutually clamped to limit the extension frame 31, so that the extension frame 31 cannot be retracted into the auxiliary ladder 2, thereby ensuring the stability of the extension frame 31 in use, when the extension frame 31 needs to be retracted, the pressing rod 41 is pressed, the pressing rod 41 abuts on the supporting rod 43, so that the supporting rod 43 rotates at the hinged position with the auxiliary ladder 2, the supporting rod 43 lifts the clamping block 45 in the form of a lever, so that the clamping block 45 moves away from the extension frame 31, thereby realizing separation from the inclined clamping tooth 47 and releasing the limitation on the extension frame 31, at this time, the extension frame 31 can be retracted into the auxiliary ladder 2, which is convenient for the staff to carry.

[0025] The inner side of the main ladder 1 is fixed with a connecting block 5, the connecting block 5 can limit the auxiliary ladder 2, when the auxiliary ladder 2 is rotated to be flat with the main ladder 1, it can be used as a normal ladder, the auxiliary ladder 2 abuts on the wall surface and is abutted by the connecting block 5, when the staff's own weight is applied, the auxiliary ladder 2 cannot be folded, thereby ensuring the stability of the auxiliary ladder 2.

[0026] The connecting hook 6 is hung on the main ladder 1 and the auxiliary ladder 2, and when the main ladder 1 and the auxiliary ladder 2 are used in a triangular shape, the connecting hook 6 is hung on the main ladder 1 and the auxiliary ladder 2, so that the angle between the main ladder 1 and the auxiliary ladder 2 is limited, and the stability of the main ladder 1 and the auxiliary ladder 2 used as a person ladder is ensured.

[0027] Based on the above embodiment, when the auxiliary ladder 2 is rotated to be flat with the main ladder 1, it can be used as a normal ladder, the auxiliary ladder 2 is in contact with the wall and is resisted by the connecting block 5, and when the worker's own weight is applied, the auxiliary ladder 2 cannot be folded, so that the stability of the auxiliary ladder 2 is ensured, and when the main ladder 1 and the auxiliary ladder 2 are used in a triangular shape, the connecting hook 6 is hung on the main ladder 1 and the auxiliary ladder 2, so that the angle between the main ladder 1 and the auxiliary ladder 2 is limited, and the stability of the main ladder 1 and the auxiliary ladder 2 used as a person ladder is ensured.

[0028] When the extension frame 31 is pulled out of the auxiliary ladder 2, the inclined clamping teeth 47 on the extension frame 31 are in contact with the clamping block 45, and the clamping block 45 is pushed to move to the side close to the fixed rod 44, and when the extension frame 31 is forced to move into the auxiliary ladder 2, the inclined clamping teeth 47 on the extension frame 31 are clamped with the clamping block 45, so that the extension frame 31 is limited, and the extension frame 31 cannot be retracted into the auxiliary ladder 2, so that the stability of the extension frame 31 in use is ensured.

[0029] After the extension frame 31 is pulled out, the stepping plate 32 is no longer limited by the auxiliary ladder 2, and under the action of the torsion spring 34, the stepping plate 32 rotates at the hinged position with the extension frame 31, and when the stepping plate 32 is resisted by the limiting plate 33, the stepping plate 32 stops swinging, and at this time, the stepping plate 32 is in a state perpendicular to the extension frame 31, and can be stepped by the worker to climb.

[0030] When the extension frame 31 needs to be retracted, the pressing rod 41 is pressed, the pressing rod 41 is in contact with the supporting rod 43, the supporting rod 43 rotates at the hinged position with the auxiliary ladder 2, the supporting rod 43 lifts the clamping block 45 in the form of a lever, the clamping block 45 moves away from the extension frame 31, so that the clamping block 45 is separated from the inclined clamping teeth 47, the limitation on the extension frame 31 is released, and at this time, the extension frame 31 can be retracted into the auxiliary ladder 2, the stepping plate 32 is resisted by the auxiliary ladder 2, the stepping plate 32 swings away from the limiting plate 33 at the hinged position with the extension frame 31, and is reset, so that the resetting is realized, the volume is small, different heights can be met, the worker is convenient to carry, and the practicability is high.

[0031] The above is a detailed description of the utility model, but some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, the modifications or improvements without departing from the spirit of the utility model are within the protection scope of the utility model.

Claims

1. A foldable ladder for elevator maintenance, comprising a main ladder (1) and an auxiliary ladder (2), characterized in that: The main ladder (1) and the auxiliary ladder (2) are hinged to each other. The auxiliary ladder (2) is provided with an extension component (3) and a limit control component (4) for limiting the extension component (3). The extension component (3) includes: Extension frame (31) is used to extend the length of the auxiliary ladder (2) to meet different height requirements; Step pedal (32) is used for staff to climb and step on; The limiting plate (33) is used to restrict the pedal (32) so that the pedal (32) can only rotate to a state perpendicular to the extension frame (31); Torsion spring (34) is used to control the automatic unfolding of the pedal (32).

2. The foldable ladder for elevator maintenance according to claim 1, characterized in that: The extension frame (31) passes through the end of the auxiliary ladder (2) away from the main ladder (1), and the extension frame (31) is slidably connected to the auxiliary ladder (2). A foot pedal (32) is hinged to the side of the extension frame (31) near the center of the auxiliary ladder (2). A limiting plate (33) and a torsion spring (34) are fixed to the side of the extension frame (31) near the foot pedal (32). The end of the torsion spring (34) away from the extension frame (31) is fixed to the foot pedal (32).

3. The foldable ladder for elevator maintenance according to claim 1, characterized in that: The limit control component (4) includes a pressing rod (41), which penetrates the surface of the auxiliary ladder (2) and is slidably connected to the auxiliary ladder (2). A return spring (42) is fixed on the inner wall of the auxiliary ladder (2), and the end of the return spring (42) away from the auxiliary ladder (2) is fixed to the surface of the pressing rod (41).

4. A foldable ladder for elevator maintenance according to claim 3, characterized in that: The inner wall of the auxiliary ladder (2) is hinged with a support rod (43), and a fixing rod (44) is fixed on the inner wall of the auxiliary ladder (2). The fixing rod (44) passes through the locking block (45) and is slidably connected to the locking block (45). A connecting spring (46) is fixed on the side of the locking block (45) near the fixing rod (44). The end of the connecting spring (46) away from the locking block (45) is fixed on the inner wall of the auxiliary ladder (2). An inclined locking tooth (47) is fixed on the side of the extension frame (31) near the pressing rod (41).

5. A foldable ladder for elevator maintenance according to claim 1, characterized in that: A connecting block (5) is fixed on the inside of the main ladder (1).

6. A foldable ladder for elevator maintenance according to claim 1, characterized in that: The main ladder (1) and the auxiliary ladder (2) are equipped with connecting hooks (6).

Images