Engineering ladder

Abstract

The utility model belongs to the technical field of engineering ladders, and particularly relates to an engineering ladder. Comprising two first supporting rods, a first cross beam is fixed between the two first supporting rods, second supporting rods capable of swinging front and back are hinged to the upper ends of the first supporting rods, and a second cross beam is fixed between the two second supporting rods; a limiting plate is connected to the outer side wall of the first supporting rod, and a first locking assembly and a second locking assembly are arranged on the second supporting rod. When the first locking assembly and the movable end of the limiting plate are mutually locked, the included angle between the first supporting rod and the second supporting rod is a flat angle; and when the second locking assembly and the movable end of the limiting plate are mutually locked, the included angle between the first supporting rod and the second supporting rod is an acute angle. According to the utility model, the included angle between the first supporting rod and the second supporting rod is locked at the acute angle or the flat angle, so that the use requirement of a herringbone ladder and the use requirement of a vertical ladder can be met, and the application range is widened.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of engineering ladder, especially a kind of engineering ladder. BACKGROUND

[0002] In the broad field of modernization construction and maintenance, the efficiency and safety of engineering operation are crucial factors. As a bridge connecting the ground and high-altitude operation platform, ladder is an indispensable basic tool in various engineering operations. From building construction, decoration to facility maintenance, emergency rescue, the application of ladder runs through every link of engineering operation, and its design and performance directly affect the operation efficiency, operation safety and labor intensity of operation personnel.

[0003] At present, the common ladders on the market are mainly divided into two types: A-frame ladder and straight ladder, which are suitable for different working environments. A-frame ladder, with its unique structure design, can be stable without external support, and is convenient for workers to carry out high-altitude operation at low height. However, with the increase of working height, the stability of the ladder is also improved. Therefore, in the working environment of higher or stable support, straight ladder becomes the first choice, but it must rely on external support such as building wall and structure. This division leads to the fact that one ladder cannot meet the different working needs in complex engineering, resulting in a lower application range. SUMMARY

[0004] The utility model aims at providing an engineering ladder, which can meet the use requirements of A-frame ladder and straight ladder and improve the application range.

[0005] The engineering ladder comprises two first support rods distributed left and right and parallel to each other, a plurality of first cross beams are fixed between the two first support rods and are sequentially distributed from bottom to top, the upper end of the first support rod is hingedly connected with a second support rod that can swing forward and backward, a plurality of second cross beams are fixed between the two second support rods and are sequentially distributed from bottom to top, a free-rotating limiting plate is connected to the outer side wall of the first support rod, the second support rod is provided with a first locking assembly and a second locking assembly that can lock the movable end of the limiting plate, the included angle between the first support rod and the second support rod is a straight angle when the first locking assembly and the movable end of the limiting plate are in a mutual locking state, and the included angle between the first support rod and the second support rod is an acute angle when the second locking assembly and the movable end of the limiting plate are in a mutual locking state.

[0006] Further, the first locking assembly and the second locking assembly each comprise a rectangular locking block, the locking block is connected to the second support rod and can freely rotate, the movable end of the limiting plate is provided with a left-right communicating locking hole, the locking hole is provided with an opening for the locking block to enter, the width of the locking block is less than the width of the opening, and the width of the opening is less than the length of the locking block.

[0007] Further, the second support rod is provided with a through hole, a connecting rod is independently arranged in the through hole, one end of the connecting rod is fixed on the lock plate, and the other end of the connecting rod is fixed on a limiting block; a lock plate is fixed on the lock block, a lock groove for locking the lock plate is arranged on the movable end of the limiting plate, the lock groove is arranged on the hole wall of the lock hole, and a spring for pushing the lock plate into the lock groove is arranged between the limiting block and the inner side wall of the second support rod.

[0008] Further, the connecting end of the limiting plate is connected to the outer side wall of the first support rod through a hinge screw.

[0009] Further, the upper end of the first support rod is fixed with a first hinge joint, the lower end of the second support rod is fixed with a second hinge joint, and the second hinge joint is connected to the first hinge joint through a pivot and can rotate relative to the first hinge joint.

[0010] Further, the limiting plate is provided with a transition groove for the lock block and the lock plate.

[0011] Further, the angle between the first support rod and the second support rod is 45 degrees when the second locking assembly and the movable end of the limiting plate are locked.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model discloses the first support rod and the second support rod between the included angle is locked in the acute angle or the angle of horizontal angle, can satisfy the use demand of the ladder of person's character and can satisfy the use demand of the straight ladder, makes the application range improvement. ACCURACY OF DRAWINGS

[0014] Figure 1 It is the structural schematic diagram of the utility model;

[0015] Figure 2 It is Figure 1 It is the local amplification structural schematic diagram of A place in middle;

[0016] Figure 3 It is the first three-dimensional structure diagram of the utility model;

[0017] Figure 4 It is the second three-dimensional structure diagram of the utility model

[0018] Figure 5 It is the partial explosion structure diagram of the utility model;

[0019] The names of various components in the drawing are as follows: 1, first support rod;2, first cross beam;3, hinge screw;4, first hinge joint;5, limiting plate;6, second hinge joint;7, second support rod;8, second cross beam;9, spring;10, limiting block;11, connecting rod;12, lock block;13, lock plate;14, pivot. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention. Example

[0021] The engineering ladder described in this embodiment, such as Figures 1 to 5 As shown, it includes two first support rods 1 that are distributed horizontally and parallel to each other. Several first crossbeams 2 are fixed between the two first support rods 1 and arranged sequentially from bottom to top. The upper ends of the first support rods 1 are all hinged to second support rods 7 that can swing back and forth. Several second crossbeams 8 are fixed between the two second support rods 7 and arranged sequentially from bottom to top.

[0022] like Figure 1 , Figure 3 and Figure 5 As shown, a first hinge joint 4 is fixed to the upper end of the first support rod 1, and a second hinge joint 6 is fixed to the lower end of the second support rod 7. The second hinge joint 6 and the first hinge joint 4 are connected by a pivot 14 and can rotate relative to each other. A hinge groove is provided on the first hinge joint 4, and a hinge joint is fixed on the second hinge joint 6. The hinge joint is located in the hinge groove, and a hinge hole is provided at the center of both the hinge joint and the hinge groove. The same pivot 14 is inserted into the two hinge holes. Limiting plates are provided at both ends of the pivot 14 for positioning to prevent the pivot 14 from falling out of the hinge hole.

[0023] like Figure 1 As shown, a freely rotatable limiting plate 5 is connected to the outer side wall of the first support rod 1. The connecting end of the limiting plate 5 is connected to the outer side wall of the first support rod 1 by a hinge screw 3. A central hole is opened at the connecting end of the limiting plate 5. The screw part of the hinge screw 3 passes through the central hole independently and is fixed on the first support rod 1. The hinge screw 3 and the first support rod 1 can be connected by threads.

[0024] like Figure 1 As shown, the second support rod 7 is provided with a first locking component and a second locking component, both of which can lock the movable end of the limiting plate 5.

[0025] like Figure 3 As shown, when the first locking component and the movable end of the limiting plate 5 are locked together, the included angle between the first support rod 1 and the second support rod 7 is a flat angle.

[0026] like Figure 4 As shown, when the second locking component and the movable end of the limiting plate 5 are locked together, the included angle between the first support rod 1 and the second support rod 7 is an acute angle.

[0027] As Figure 2 shown, the first locking assembly and the second locking assembly each include a lock block 12 in a rectangular structure, the lock block 12 is connected to the second support rod 7 and can rotate freely, the movable end of the limiting plate 5 is provided with a left-right communicating lock hole, the lock hole is provided with an opening for the lock block 12 to enter, the width of the lock block 12 is smaller than the width of the opening, and the width of the opening is smaller than the length of the lock block 12. In use, by rotating the lock block 12, the structure that the width of the lock block 12 is smaller than the width of the opening is used to make the lock block 12 enter the lock hole, and then the lock block 12 is rotated to make the width of the lock block 12 staggered with the opening of the lock hole, and the structure that the width of the opening is smaller than the length of the lock block 12 is used to lock the lock block 12 in the lock hole.

[0028] As Figure 5 shown, in order to make the structure more stable during production, the side wall of the lock block 12 is usually provided in an arc-shaped structure that fits the hole wall of the lock hole, which can effectively reduce the shaking of the lock block 12 when locking the limiting plate 5. When the lock block 12 is locked in the lock hole, the movable end of the limiting plate 5 is locked and cannot continue to move, and the included angle between the first support rod 1 and the second support rod 7 is also limited.

[0029] As Figure 3 shown, when the movable end of the limiting plate 5 is locked on the lock block 12 of the first locking assembly, the included angle between the first support rod 1 and the second support rod 7 is a straight angle, at this time the first support rod 1 and the second support rod 7 are on the same vertical line, which can be used by workers to make a straight ladder, and the first cross beam 2 and the second cross beam 8 are used to climb high. Therefore, the lock block 12 of the first assembly is located below the lock block 12 of the second assembly.

[0030] As Figure 4 shown, when the movable end of the limiting plate 5 is locked on the lock block 12 of the first locking assembly, the included angle between the first support rod 1 and the second support rod 7 is a straight angle, at this time the first support rod 1 and the second support rod 7 are on the same vertical line, which can be used by workers to make a straight ladder, and the first cross beam 2 and the second cross beam 8 are used to climb high. Therefore, the lock block 12 of the first assembly is located below the lock block 12 of the second assembly.

[0031] As Figure 1 and Figure 5 shown; the second support rod 7 is provided with a through hole, the connecting rod 11 is independently arranged in the through hole, one end of the connecting rod 11 is fixed on the lock plate 13, the other end of the connecting rod 11 is fixed on the limiting block 10; the lock plate 13 is fixed on the lock block 12, the movable end of the limiting plate 5 is provided with a lock slot for locking the lock plate 13, the lock slot is located on the hole wall of the lock hole, and the limiting block 10 and the inner side wall of the second support rod 7 are provided with a spring 9 for pushing the lock plate 13 into the lock slot.

[0032] The lock block 12 is freely rotatable on the second support rod 7 by the connecting rod 11, and the limiting block 10 prevents the connecting rod 11 from being separated from the through hole; when the lock plate 13 is locked in the lock slot, the lock block 12 cannot be rotated. In use, the limiting block 10 on the inner side of the second support rod 7 can be pressed to compress the spring 9, so that the lock plate 13 is separated from the lock slot, and the lock block 12 can be rotated to make the width thereof opposite to the opening of the lock hole, at which time the movable end of the limiting plate 5 is separated from the lock block 12.

[0033] When locked, the limiting block 10 also needs to be pressed, the spring 9 is compressed, the lock block 12 enters the lock hole from the opening, and the lock plate 13 does not interfere with the limiting plate 5, then the lock block 12 is rotated to make the width thereof staggered with the opening, until the lock plate 13 is aligned with the lock slot, at which time the lock plate 13 enters the lock slot under the pushing force of the spring 9, at which time the lock block 12 cannot be rotated, avoiding the situation that the lock block 12 is separated from the limiting plate 5 during use; at the same time, the lock plate 13 is locked in the lock slot, which also increases the stability of the locking between the limiting plate 5 and the lock block 12.

[0034] As shown in Figure 1 The limiting plate 5 is provided with a transition groove for the lock block 12 and the lock plate 13 to pass through; when the movable end of the limiting plate 5 needs to be locked with the lock block 12 located above, that is, the lock block 12 of the second locking assembly, the limiting plate 5 needs to pass through the lock block 12 of the first locking assembly, in order to avoid the interference of the lock block 12 to the limiting plate 5, the transition groove is formed on the limiting plate 5, so that the lock block 12 can pass through the transition groove during the movement of the limiting plate 5.

[0035] In actual use, the first support rod 1 and the second support rod 7 can be combined by folding, so as to be carried by the staff, in use, the first support rod 1 and the second support rod 7 are unfolded, and the limiting plate 5 is moved to be locked on the lock block 12 of the first locking assembly or the second locking assembly; when the movable end of the limiting plate 5 is locked with the lock block 12 of the first assembly, the included angle between the first support rod 1 and the second support rod 7 is a straight angle, that is, 180 degrees, which can be used as a straight ladder; when the movable end of the limiting plate 5 is locked with the lock block 12 of the second locking assembly, the included angle between the first support rod 1 and the second support rod 7 is 45 degrees, which can be used as a ladder, so as to achieve the purpose of one ladder for two uses, and the application range is wider, and the situation that the straight ladder and the ladder need to be carried in one project is avoided.

Claims

1. An engineering ladder, comprising two first support rods (1) arranged in left and right directions and parallel to each other, and a plurality of first cross beams (2) fixed between the two first support rods (1) and arranged in sequence from bottom to top, characterized in that: The upper end of the first support rod (1) is hinged with a second support rod (7) which can swing forward and backward, a plurality of second cross beams (8) are fixed between the two second support rods (7) and are distributed from bottom to top in sequence; the outer side wall of the first support rod (1) is connected with a limiting plate (5) which can rotate freely, the second support rod (7) is provided with a first locking assembly and a second locking assembly which can lock the movable end of the limiting plate (5); when the first locking assembly and the movable end of the limiting plate (5) are locked with each other, the included angle between the first support rod (1) and the second support rod (7) is a straight angle; when the second locking assembly and the movable end of the limiting plate (5) are locked with each other, the included angle between the first support rod (1) and the second support rod (7) is an acute angle.

2. The engineered ladder of claim 1, wherein: The first locking assembly and the second locking assembly both include a lock block (12) in a rectangular structure, the lock block (12) is connected to the second support rod (7) and can rotate freely, the movable end of the limiting plate (5) is provided with a lock hole which is communicated left and right, the lock hole is provided with an opening for the lock block (12) to enter, the width of the lock block (12) is less than the width of the opening, and the width of the opening is less than the length of the lock block (12).

3. The engineered ladder of claim 2, wherein: The second support rod (7) is provided with a through hole which is communicated, a connecting rod (11) is independently arranged in the through hole, one end of the connecting rod (11) is fixed to a lock plate (13), and the other end of the connecting rod (11) is fixed to a limiting block (10); the lock block (12) is fixed with the lock plate (13), the movable end of the limiting plate (5) is provided with a lock groove for the lock plate (13) to lock into, the lock groove is located on the hole wall of the lock hole, and the limiting block (10) and the inner side wall of the second support rod (7) are provided with a spring (9) which drives the lock plate (13) to enter the lock groove.

4. The engineered ladder of claim 1, wherein: The connecting end of the limiting plate (5) is connected to the outer side wall of the first support rod (1) through a hinge screw (3).

5. The engineered ladder of claim 1, wherein: The upper end of the first support rod (1) is fixed with a first hinge joint (4), the lower end of the second support rod (7) is fixed with a second hinge joint (6), and the second hinge joint (6) and the first hinge joint (4) are connected through a pivot (14) and can rotate with each other.

6. The engineered ladder of claim 3, wherein: The limiting plate (5) is provided with a transition groove for the lock block (12) and the lock plate (13) to pass through.

7. The engineered ladder of claim 1, wherein: When the second locking assembly and the movable end of the limiting plate (5) are locked with each other, the included angle between the first support rod (1) and the second support rod (7) is 30 to 89 degrees.

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