Foundation pit safety ladder

Abstract

The utility model discloses a foundation pit safety ladder which comprises two vertical ladders and supporting assemblies used for adjusting supporting points of the vertical ladders, the supporting assemblies are arranged on the lower middle portions of the two sides of the vertical ladders correspondingly, each supporting assembly comprises channel steel, a guide groove is formed in each channel steel, a sliding block is arranged in each guide groove, a locking piece is arranged on the side face of each sliding block, and a through hole is formed in the top face of each sliding block. A lifting rod is arranged in the through hole, and a supporting piece is arranged at the bottom of the lifting rod. A receding hole allowing the lifting rod to swing is formed in the groove face of the steel channel. According to the safety ladder, supporting points are increased through the supporting assemblies, and stability is improved during use; secondly, when the safety ladder is used in a bumpy construction environment, a lifting rod on the supporting assembly can arrange supporting points on a low surface or a high surface in a lifting mode, and the situation that construction is affected due to shaking caused by insufficient supporting points or inclination of the safety ladder is prevented; and finally, the two vertical ladders of the safety ladder are arranged to be in a detachable state, and the weight of a single vertical ladder is low, so that the safety ladder is more convenient to carry.

Description

Technical Field

[0001] The present application relates to the field of building construction, and in particular to a foundation pit safety ladder. Background Art

[0002] Foundation pit refers to the space below the ground excavated for the construction of building foundations and basements, and is a type of construction environment.

[0003] At present, in the process of construction such as foundation pit, the ladder used is usually a straight ladder or a herringbone ladder for climbing. Because the construction situation is complicated, sometimes the straight ladder and the herringbone ladder are used crosswise, therefore, it is necessary to prepare two types of ladders, a straight ladder and a herringbone ladder. However, these ladders all have some shortcomings. First, the stability is lacking. When the staff climbs the ladder higher, it will cause a top-heavy situation. When the stability of the support below deteriorates, additional staff are needed to help the ladder to improve the stability, which increases the labor cost; secondly, the construction environment is complex, and the ground may be uneven. The bottom of the existing ladder is flat. When encountering a bumpy environment, the ladder is easy to shake and the stability becomes worse. In the prior art, a safety ladder for construction engineering is disclosed (authorization announcement number: CN216240386U), which can increase the support surface at the bottom of the ladder and increase the stability of the ladder by setting a support mechanism and an adjustment mechanism. However, the bottom of the safety ladder is flat, which can provide a support surface to increase the stability of the ladder, but it cannot adapt to the uneven construction environment, and it is relatively troublesome to adjust the flatness. In addition, the safety ladder is a herringbone ladder. When a straight ladder is needed, the herringbone ladder is heavy and inconvenient to carry. Utility Model Content

[0004] The technical problem to be solved by the present application is to provide a foundation pit safety ladder, which can adjust the supporting structure in an uneven construction environment to improve stability; it can be assembled into a herringbone ladder or disassembled into a straight ladder for use as needed to improve the convenience of transportation.

[0005] In order to solve the above technical problems, this application adopts the following technical solutions:

[0006] A foundation pit safety ladder includes two straight ladders, the top surfaces of the two straight ladders are detachably hinged with a support plate, and also include support components for adjusting the support points of the straight ladders, the support components are respectively arranged at the middle and lower parts of both sides of the straight ladders, the support components include channel steel, a guide groove is provided on the channel steel, a slider is provided in the guide groove, a locking member is provided on the side of the slider, a through hole is provided on the top surface of the slider, a lifting rod is provided in the through hole, and a support member is provided at the bottom of the lifting rod; the groove surface of the channel steel is provided with a clearance hole for the lifting rod to swing. The lifting rod can swing in the guide groove with the slider and be locked by the locking member. When the safety ladder is opened into a herringbone shape, the lifting rod can be adjusted to be parallel to the ground to provide more support points; when used in a bumpy construction environment, the lifting rod can be adjusted up and down so that the bottom of the lifting rod is in contact with the ground of the construction environment to improve stability. In addition, the two straight ladders are designed to be detachably hinged. When only the straight ladder is needed, one of the straight ladders can be removed and carried to the construction site.

[0007] In order to ensure that the slider can move on the channel steel without tilting or deflecting, the above solution is further expanded so that the guide grooves are respectively opened on the left and right end surfaces of the channel steel.

[0008] In order to enable the slider to be arranged in two guide grooves and to install the lifting rod, the above scheme is further expanded, the slider is cross-shaped, and the two lateral ends of the slider are respectively arranged in the guide grooves of the left and right end faces of the channel steel.

[0009] In order to lock and fix the slider, the above scheme is further expanded. The left end of the slider is longer than the right end, and the outer wall of the left end is provided with a thread; the locking member is a locking nut, which is threadedly connected to the left end of the slider.

[0010] In the above solution, the through hole is a threaded hole, and the lifting rod is a threaded rod.

[0011] The function of the support member is to support and fix the lifting rod, as well as to support the movement of the safety ladder. In order to achieve this technical effect, the above scheme is further expanded. The support member includes a short rod, which is connected to the bottom of the lifting rod. The bottom of the short rod is spherical, and an angle adjustment sleeve is provided on the short rod. The angle adjustment sleeve includes three parts: upper, middle and lower parts. The middle part of the angle adjustment sleeve is outward drum-shaped, and the upper part of the angle adjustment sleeve is sleeved on the short rod, and the middle part is sleeved on the spherical bottom of the short rod; a notch is provided on the side wall from the top surface of the angle adjustment sleeve to the connection between the middle and lower parts; a guide wheel is provided at the bottom of the angle adjustment sleeve.

[0012] The two ladders can be disassembled. To achieve this function, a pair of ear plates are provided on the side of any of the ladders, a circular ring sleeve is hinged between the ear plates, a round rod is provided in the circular ring sleeve, and a screw is screwed on the side wall of the end of the round rod.

[0013] In the above scheme, a sleeve is further provided at the bottom of the support plate, through holes are provided on both sides of the ladder, the round rod extends from the through hole on one side of the ladder, passes through the sleeve of the support plate, and then extends from the through hole on the other side of the ladder.

[0014] Compared with the prior art, the present application achieves at least the following beneficial effects: First, the safety ladder adds 4 support points through the support assembly, which improves stability when used; second, when used in an uneven construction environment, the lifting rod on the support assembly can arrange the support points on the low surface or high surface by lifting, so as to prevent the safety ladder from shaking due to insufficient or tilted fulcrums and affecting construction; finally, the two straight ladders of the safety ladder are arranged to be detachable, and can be removed when a straight ladder is needed. Compared with carrying a safety ladder, a single straight ladder is lighter and more convenient to carry. When a herringbone ladder is needed, the two straight ladders can be connected at the support plate and can be used, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] One or more embodiments of the present application will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0016] Figure 1 This is a three-dimensional display diagram of the assembled safety ladder of one embodiment of the present application;

[0017] Figure 2 for Figure 1 The local schematic diagram of the A in the middle;

[0018] Figure 3 for Figure 1 Side view of the state;

[0019] Figure 4 for Figure 3 The local schematic diagram of point B in the middle;

[0020] Figure 5 A working diagram showing the safety ladder for this application;

[0021] Figure 6 A three-dimensional working diagram showing the application in a bumpy construction environment;

[0022] Figure 7 A three-dimensional display of the dismantling of the safety ladder;

[0023] Figure 8 for Figure 7 The local schematic diagram of the C in the middle;

[0024] Fig. 9 This is a working display diagram of the straight ladder after the safety ladder of this application is dismantled.

[0025] The numbers in the figure are: 1. straight ladder; 1-1. through hole; 2. support plate; 2-1. sleeve; 3. slider; 4. locking piece; 5. channel steel; 6. ear plate; 7. ring sleeve; 8. round rod; 8-1. flange; 9. lifting rod; 10. short rod; 11. angle adjustment sleeve; 12. guide wheel; 13. screw. DETAILED DESCRIPTION

[0026] The present application will be described in detail below with reference to the exemplary embodiments in the accompanying drawings. However, it should be understood that the present application can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. These embodiments are provided here to make the disclosure of the present application more complete and to fully convey the concept of the present application to those skilled in the art.

[0027] In the description of the present application, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present application.

[0028] The inventors of the prior art have the defects that ladders may tilt or shake in bumpy construction environments, and that it is impossible to choose a herringbone ladder or a straight ladder to work according to needs. After careful analysis, the inventors found that the main reason for the above problems with existing ladders is that the feet of the existing herringbone ladders and straight ladders are flat, that is, parallel to the ground. When the ground is uneven, the ladder may tilt. When there is a large height difference between the bottom of the ladder and the ground, it may not be possible to find a suitable support. In this way, when the operator is working on the ladder, he needs to bend, turn around, or turn sideways, and the ladder may shake, resulting in poor stability. Secondly, for different construction objects, the ladder structure may be different. A straight ladder may be more suitable for working against a wall, and a herringbone ladder may be more suitable for working overhead. A straight ladder is light in weight, while a stepladder is heavy in weight. Therefore, if a stepladder is used instead of a straight ladder, it will take more effort to carry it. Some stepladders made of all metal may require two people to lift. Therefore, the existing stepladder is not convenient to use as a straight ladder, and the straight ladder is not convenient to be combined into a stepladder. Based on the above analysis, the inventor has made structural improvements to the ladder used in construction.

[0029] like Figure 1-9As shown, in one embodiment of a foundation pit safety ladder of the present application, the safety ladder includes two straight ladders 1 equidistantly distributed on the left and right, and a support plate 2 is detachably hinged on the top surface of the two straight ladders 1, wherein a support assembly for adjusting the support point of the straight ladder 1 is also included, and the support assembly is respectively arranged at the middle and lower parts of the two sides of the straight ladder 1, and the support assembly includes a channel steel 5, and the channel steel 5 is connected to the side of the straight ladder 1 by bolts, and a guide groove is provided on the channel steel 5, and a movable slider 3 is provided in the guide groove, and a locking piece 4 is provided on the side of the slider 3 (away from the ladder side), and a through hole is provided on the top surface of the slider 3, and a lifting rod 9 is provided in the through hole, and a support piece is provided at the bottom of the lifting rod 9; the groove surface of the channel steel 5 is provided with a makeshift hole for the lifting rod 9 to swing. The lifting rod 9 can swing in the guide groove with the slider 3 and be locked by the locking piece 4. When the safety ladder is in the stored state, Figure 1 When the safety ladder is opened into a herringbone shape, Figure 5 As shown, at this time, the lifting rod 9 is adjusted to be parallel to the ground, providing more support points to improve stability, because the support components are distributed on the left and right sides of the ladder. Figure 3 Taking the side view as a reference, the support points formed by the support assembly are distributed along the lateral direction of the ladder 1, which can reduce the risk of the ladder tipping over; when used in an uneven construction environment, the lifting rod 9 can be adjusted up and down, such as Figure 7 As shown, the support member at the bottom of the lifting rod 9 is in contact with the bottom surface of the ground in the construction environment, increasing the support points, preventing the ladder frame from shaking on the uneven ground, and increasing stability. In addition, the two straight ladders 1 are designed to be detachably hinged. When only the straight ladder 1 is needed, Figure 7 As shown, one of the ladders 1 can be removed and carried to the construction site for wall-based operations. Of course, the support components can also be propped up to increase the support points according to the terrain conditions.

[0030] When the ladder 1 is opened, it will tilt at a certain angle, so that the support assembly can move on the channel steel 5, which requires the support of the slider 3. In order to ensure that the slider 3 can move on the channel steel 5 without tilting or offsetting, the guide grooves are respectively opened on the left and right end surfaces of the channel steel 5; in order to enable the slider 3 to be set in the two guide grooves and to install the lifting rod 9, the slider 3 is in the shape of a cross column. Figure 3 Taking the side view as a reference, the two transverse ends of the sliding block 3 are respectively arranged in the guide grooves of the left and right end surfaces of the channel steel 5.

[0031] In order to lock and fix the slider 3, the left end of the slider 3 is longer than the right end. Figure 3 Taking the side view as a reference, the left end of the slider 3 arranged on the left side of the ladder 1 is longer than its right end, and the right end of the slider 3 arranged on the right side of the ladder 1 is longer than its left end. This embodiment only takes the slider 3 arranged on the left side of the ladder as an example. The outer wall of the left end of the slider 3 is threaded; the locking member 4 is a locking nut, which is connected to the left end of the slider 3 by thread.

[0032] In order to enable the lifting rod 9 to move on the slider 3 and to be fixed on the slider 3, the through hole on the top surface of the slider 3 is a threaded hole, and the lifting rod 9 is a threaded rod. The threaded rod is rotated to control its lifting.

[0033] The function of the support member is to support and fix the lifting rod 9 when it is in contact with the ground, and to support the movement of the safety ladder. In order to achieve this technical effect, the support member includes a short rod 10, which is welded to the bottom of the lifting rod 9. The bottom of the short rod 10 is spherical, and the diameter of the bottom is larger than the diameter of the short rod 10. An angle adjustment sleeve 11 is sleeved on the short rod 10. The body of the angle adjustment sleeve 11 is a circular sleeve, and the middle part of the angle adjustment sleeve 11 is outwardly drum-shaped, dividing the angle adjustment sleeve 11 into three parts: upper, middle and lower. The upper part of the angle adjustment sleeve 11 is sleeved on the short rod 10, and the middle part of the angle adjustment sleeve 11 is sleeved on the spherical bottom of the short rod 10; a notch is provided on the side wall from the top surface of the angle adjustment sleeve 11 to the connection between the middle and the lower part, and a guide wheel 12 is provided at the bottom of the angle adjustment sleeve 11, such as Figure 4 As shown, when the safety ladder is in the storage state, the notch is used to make way, the angle adjustment sleeve 11 can swing to form a 90° angle with the short rod 10, and the guide wheel 12 stands vertically to the ground, so that the safety ladder can be transported to a designated position; when the safety ladder is in use, as shown Figure 5 , 6 As shown in 8, the angle adjustment sleeve 11 is straightened and coaxial with the short rod 10. At this time, the end face of the guide wheel 12 is parallel to the ground, forming a support point or support surface.

[0034] The two ladders 1 can be disassembled, so that the weight can be reduced when the ladders 1 are used. In order to achieve this effect, a pair of ear plates 6 are provided on the side of any of the ladders 1 (in this embodiment, the ear plates 6 are arranged on the ladder 1 on the right), and a circular ring sleeve 7 is hinged between the ear plates 6. A retractable round rod 8 is provided in the circular ring sleeve 7, and a screw 13 is screwed on the side wall at the end of the round rod 8 for limiting.

[0035] A sleeve 2-1 is welded to the bottom of the support plate 2, and through holes 1-1 are provided on both sides of the straight ladder 1. The through holes 1-1 are generally convex in shape to accommodate the round rod 8 and the screws 13 passing through. When the support plate 2 is placed horizontally on the top of the two straight ladders 1, the sleeve 2-1 is arranged between the two uprights of the straight ladder 1, and the round rod 8 extends from the through hole 1-1 provided on one side of the straight ladder 1, passes through the sleeve 2-1 of the support plate 2, and then extends from the through hole 1-1 on the other side of the straight ladder 1, and then the round rod 8 is rotated so that the bolts on the round rod 8 are not in line with the convex openings of the through holes, so as to prevent the round rod 8 from coming out of the ladder. Of course, in order to allow the other end of the round rod 8 to come out of the circular ring sleeve 7, a flange 8-1 is also provided at the bottom of the round rod 8.

[0036] The method of use or working principle of the safety ladder is: when the safety ladder needs to be transferred, Figure 1-4 As shown, at this time, the angle adjustment sleeve 11 of the support member and the short rod 10 are at a 90° angle, and the guide wheel 12 rotates to transfer the safety ladder; when the safety ladder needs to be deployed for use, as shown in FIG. Figure 5 and Figure 6 As shown, first open the safety ladder and place it, then straighten the angle adjustment rod, loosen the locking piece 4, so that the slider 3 can move in the guide groove of the channel steel 5, and move it to a suitable position, even if the end face of the guide wheel 12 contacts the ground, at this time, you can step on the guide wheel 12 and tighten the locking piece 4; if the lower surface has a height difference, you can adjust the height of the slider 3 or the lifting rod 9 to make the guide wheel 12 contact the ground at different heights, and finally Figure 6 As shown; if only the straight ladder 1 is needed, Figure 7 and Fig. 9 As shown, first pull out the round rod 8 from the circular ring sleeve 7 on the right vertical ladder 1 to separate the sleeve 2-1 on the support plate 2 from the vertical ladder 1, and then the disassembled vertical ladder 1 can be used.

[0037] It should be understood that all the above embodiments are illustrative rather than restrictive, and various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of the present application should be within the protection scope of the present application.

Claims

1. A foundation pit safety ladder, comprising two straight ladders, the top surfaces of the two straight ladders are detachably hinged with a support plate, characterized in that: It also includes a support assembly for adjusting the support point of the straight ladder, which is respectively arranged at the middle and lower parts of both sides of the straight ladder. The support assembly includes a channel steel, a guide groove is opened on the channel steel, a slider is arranged in the guide groove, a locking piece is arranged on the side of the slider, a through hole is opened on the top surface of the slider, a lifting rod is arranged in the through hole, and a support piece is arranged at the bottom of the lifting rod; a makeshift hole for the lifting rod to swing is opened on the groove surface of the channel steel.

2. The safety ladder according to claim 1, characterized in that: The guide grooves are respectively arranged on the left and right end surfaces of the channel steel.

3. The safety ladder according to claim 2, characterized in that: The sliding block is in a cross shape, and the two transverse ends of the sliding block are respectively arranged in the guide grooves of the left and right end surfaces of the channel steel.

4. The safety ladder according to claim 3, characterized in that: The left end of the slider is longer than the right end, and a thread is formed on the outer wall of the left end; the locking member is a locking nut, which is threadedly connected to the left end of the slider.

5. The safety ladder according to claim 1, characterized in that: The through hole is a threaded hole, and the lifting rod is a threaded rod.

6. The safety ladder according to claim 1, characterized in that: The support member includes a short rod, which is connected to the bottom of the lifting rod. The bottom of the short rod is spherical, and an angle adjustment sleeve is sleeved on the short rod. The angle adjustment sleeve includes three parts: upper, middle and lower parts. The middle part of the angle adjustment sleeve is outwardly drum-shaped, and the upper part of the angle adjustment sleeve is sleeved on the short rod, and the middle part is sleeved on the spherical bottom of the short rod; a notch is opened on the side wall of the angle adjustment sleeve from the top surface to the connection between the middle and lower parts; a guide wheel is provided at the bottom of the angle adjustment sleeve.

7. The safety ladder according to claim 1, characterized in that: A pair of ear plates are arranged on the side of any of the straight ladders, a circular ring sleeve is hinged between the ear plates, a round rod is arranged inside the circular ring sleeve, and a screw is screwed on the side wall of the end of the round rod.

8. The safety ladder according to claim 7, characterized in that: A sleeve is provided at the bottom of the support plate, through holes are provided on both sides of the ladder, the round rod extends from the through hole on one side of the ladder, passes through the sleeve of the support plate, and extends from the through hole on the other side of the ladder.

Images