Roof manhole climbing ladder

Abstract

The invention relates to a roof manhole climbing ladder which comprises a fixed ladder installed on the surface of the side wall of the lower side of a roof manhole, the fixed ladder is composed of a plurality of ladder steps, a sliding ladder is arranged on the outer sides of the ladder steps, the sliding ladder comprises a sliding rail and a ladder plate, the sliding rail adopts two U-shaped steel channels, notches of the U-shaped steel channels are oppositely arranged, and the sliding rail is fixedly connected to the two sides of the outer ends of the ladder steps; the ladder plate comprises two stand columns, the two stand columns are connected through a plurality of row rods, and the stand columns are installed in the U-shaped channel steel in a sliding mode. According to the scheme, the lower-section ladder is preassembled on the upper-section ladder, and the lower-section ladder is pulled down to be used and lifted up to be hidden through sliding, so that children cannot climb the ladder, and convenience is ensured when a worker uses the ladder.

Description

Technical Field

[0001] The invention belongs to a ladder climbing device in a construction project, and in particular relates to a roof manhole climbing ladder. Background Art

[0002] According to the requirements of 6.14.6.5 of the Unified Standard for Civil Building Design, "The roof should be equipped with an access opening: when the roof is not accessible by stairs and is less than 10m, an external wall ladder can be installed, and safety protection and measures to prevent children from climbing can be applied." For small roofs of single buildings with no evacuation requirements, no machine room layout, and no equipment installation requirements, in order to implement the national laws, regulations and policies on saving resources and protecting the environment and reduce carbon emission efficiency, setting up a simple manhole on the roof is the most practical and effective measure to get on the roof. Most of the existing ladders are formed by flattening steel bars and building them into the wall at one time. In order to prevent children from climbing, the last step of the ladder to the roof is usually higher than the ground, which brings many inconveniences to the later inspection and maintenance. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the existing half-wall ladder needs to prepare a ground ladder before climbing, and the lower section needs to be connected when in use, which makes the construction inconvenient.

[0004] The present invention solves the above-mentioned problem by adopting the following technical solution: A roof manhole climbing ladder comprises a fixed ladder installed on the lower side wall surface of the roof manhole, the fixed ladder consists of a plurality of steps, a sliding ladder is arranged outside the steps, the sliding ladder comprises a slide rail and a ladder plate, the slide rail adopts two U-shaped channel steels, the notches are arranged oppositely, and are fixedly connected to the two sides of the outer ends of the steps, and the left and right walls of the lower ends of the two U-shaped channel steels are provided with through holes; the ladder plate comprises two columns, the two columns are connected by a plurality of rows of rods, the columns are slidably installed in the U-shaped channel steel, and the lower ends of the columns are provided with through holes; a padlock is installed on the through hole and the through hole.

[0005] Compared with the prior art, the present invention adopting the above structure has the following beneficial effects: In this solution, the lower ladder is pre-installed on the upper ladder. The lower ladder can be pulled down for use and lifted up for hiding by sliding, which ensures that children cannot climb up and ensures the convenience of staff when using it.

[0006] As a preferred embodiment, a further technical solution of the above structure is: The inner surface of the rear side wall at the lower end of the slide rail is fixedly connected to a limiting block, and the outer side surface of the column is fixedly connected to a tongue, which falls on the limiting block.

[0007] The beneficial effects obtained by the above features are as follows: it has a downward limiting effect on the sliding ladder section, which on the one hand prevents the sliding ladder from being disconnected from the fixed ladder, and on the other hand fixes the upper end of the sliding ladder, thereby improving its stability during use.

[0008] Both ends of the through hole are bell mouths, and the diameter of the through hole is larger than the bell mouths.

[0009] The beneficial effects obtained by the above features are as follows: this embodiment facilitates the installation of the padlock, and because the bell-mouth structure makes the inner wall of the through hole arc-shaped, the arc portion of the lock rod of the padlock can enter, so that the padlock can be hung directly at the lower end of the ladder.

[0010] A plurality of grooves are symmetrically arranged on the side outer wall of the column, each groove having a deepest point, and the deepest point is connected to the outer wall of the column by an inclined surface; a roller assembly is arranged on the outer side of the groove, and the roller assembly is fixedly connected to the left and right walls of the slide rail through an elastic mounting seat.

[0011] The beneficial effects obtained by the above features are as follows: the roller guides the sliding ladder to make its lifting more stable and reduce friction and impact with the slide rail; the roller uses a spring to be stuck in the groove to prevent the sliding ladder from falling, so that the sliding ladder can prevent falling when it goes down and can output force intermittently when it goes up, thereby improving safety and saving manpower.

[0012] Specifically, the roller assembly includes a fixed frame, a sliding frame, a spring and a roller. The fixed frame is welded or bolted to the side wall of the slide rail; the guide rod is fixed to the side surface of the fixed frame, the spring is mounted on the guide rod, the sliding frame is provided with a sliding hole corresponding to the guide rod, the sliding frame is installed on the outside of the spring, the outside of the sliding frame is fixedly connected to the support plate, and the roller is installed on the outer end of the support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the basic structure diagram of the present invention; Figure 2 It is a schematic diagram of the structure of the present invention from a top view; Figure 3 It is a structural diagram of the sliding ladder of the present invention; Figure 4 It is a schematic diagram of the top structure of the ladder plate of the present invention; Figure 5 It is a schematic diagram of the matching structure of the sliding ladder of the present invention and the sliding rail when the sliding ladder is in the lowered position; Figure 6 It is a schematic diagram of the structure of the lower end of the ladder plate of the present invention; Figure 7 It is a schematic diagram of the matching structure of the sliding ladder of the present invention and the sliding rail when the sliding ladder is in the hanging position; Figure 8 This is a diagram showing an embodiment of the groove shape on the surface of a column of the present invention; Fig. 9 This is a schematic diagram of the cooperation between the roller and the ladder plate of the present invention; Fig.10 It is a top view of the matching structure of the roller and the sliding ladder of the present invention.

[0014] Explanation of the reference numerals: 1. fixed ladder; 2. sliding ladder; 3. slide rail; 31. rear side panel; 32. left side panel; 33. right side panel; 4. ladder panel; 41. column; 42. row rod; 5. tongue; 6. groove; 7. through hole; 8. foot plate; 9. limit block; 10. through hole; 11. padlock; 12. roller wheel assembly; 121. roller; 122. sliding frame; 123. spring; 124. fixed frame. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0016] See also Figures 1 to 10 The present invention provides a roof manhole climbing ladder, comprising a fixed ladder 1 installed on the lower side wall surface of the roof manhole, the fixed ladder 1 is composed of a plurality of steps, a sliding ladder 2 is arranged outside the steps, and the sliding ladder 2 comprises a slide rail 3 and a ladder plate 4. The slide rail 3 is made of two U-shaped channel steels, with the notches arranged opposite to each other, fixed to the two sides of the outer ends of the steps, and the left side wall 32 and the right side wall 33 of the lower end of the two U-shaped channel steels are provided with through holes 10; The ladder plate 4 includes two columns 41, which are connected by a plurality of rows of rods 42. The columns 41 are slidably installed in the U-shaped channel steel, and the lower ends of the columns 41 are provided with through holes 7; The padlock 11 is installed on the through hole 10 and the through hole 7 .

[0017] In this scheme, the lower ladder section is hidden in the upper ladder section by the telescopic sliding ladder 2. When in use, the staff can directly pull the sliding ladder 2 out of the fixed ladder 1 to climb up, which is more convenient. In this scheme, the fixed ladder 1 not only serves as a stepping stone for people, but also bears the assembly weight of the sliding ladder 2. Therefore, the ladder steps should be made of reinforced steel bars and steel pipes.

[0018] In this solution, the slide rail 3 is made of U-shaped channel steel, which is directly welded to the outer end of each step. The two U-shaped channel steels should be parallel and perpendicular to the ground.

[0019] The sliding ladder 2 has at least two positions, which are called the hanging position when hidden in the fixed ladder 1 and the landing position when in use. The following is a structural embodiment of constraining the two positions of the sliding ladder 2 provided by the present invention.

[0020] Optionally, the inner surface of the rear side wall 31 at the lower end of the slide rail 3 is fixedly connected to a limiting block 9, and the outer side surface of the column 41 is fixedly connected to a tongue 5, which falls on the limiting block 9; through the cooperation between the tongue 5 and the limiting block 9, the sliding ladder 2 section has a downward limiting effect, on the one hand to prevent the sliding ladder 2 from being disconnected from the fixed ladder 1, and on the other hand to fix the upper end of the sliding ladder 2, thereby improving its stability during use.

[0021] Optionally, referring to Figures 6 and 7, the structure of the through hole 7 is that the two ends are trumpet-shaped and the middle is connected, so that the inner wall forms an arc-shaped structure. The through hole 10 is designed to be a trumpet-shaped mouth with a diameter larger than that of the through hole 7. In this way, after the sliding ladder is pushed up, the trumpet-shaped mouth is completely exposed in the through hole, and the hole is easily aligned. The structure of the through hole 7 facilitates the installation of the padlock 11. After the locking rod of the padlock 11 is inserted into the through hole 7, the arc portion of the locking rod can be rotated to enter the through hole 7, so that the padlock 11 can be hung directly on the lower end of the ladder.

[0022] See Figures 8, 9 and Fig.10 In the present invention, a plurality of grooves 6 are symmetrically arranged on the outer wall of the side of the column 41, and the groove 6 has a deepest point, and the deepest point is connected to the outer wall of the column 41 by an inclined surface; a roller assembly 12 is arranged on the outer side of the groove 6, and the roller assembly 12 is fixedly connected to the left side wall 32 and the right side wall 33 of the slide rail 3 through an elastic mounting seat.

[0023] Specifically, the specific installation structure of the roller assembly 12 is: it includes a fixed frame 124, a sliding frame 122, a spring 123 and a roller 121, the fixed frame 124 is welded or bolted to the side wall of the slide rail 3; the guide rod is fixed to the side surface of the fixed frame 124, the spring 123 is mounted on the guide rod, the sliding frame 122 is provided with a sliding hole corresponding to the guide rod, the sliding frame 122 is installed on the outside of the spring 123, the outside of the sliding frame 122 is fixedly connected to the support plate, and the roller 121 is installed on the outer end of the support plate.

[0024] When the column 41 extends out of the inner cavity of the slide rail 3, the roller 121 is squeezed, the spring 123 contracts, the surface of the column 41 maintains a certain pressure with the roller 121, and the roller 121 is used to avoid collision with the slide rail 3 and smoothly rise and fall; when the groove 6 on the surface of the column 41 is located at the position of the roller 121, the roller 121 abuts against the bottom of the groove 6 due to the pressure of the spring 123, and the symmetrical rollers 121 on both sides and the extrusion force of the ladder plate 4 produce a limiting effect. When there is no further downward pulling force or upward thrust, the clamping force resists the gravity of the ladder plate 4 so that the ladder plate 4 is kept at the current height. The roller 121 plays a guiding role for the sliding ladder 2 to make it more stable and reduce friction and collision with the slide rail 3; the roller 121 uses the spring 123 to be stuck in the groove 6 to prevent the sliding ladder 2 from falling when it goes down, and can intermittently output force when it goes up, thereby improving safety and saving manpower.

[0025] Optionally, the position of the groove 6 corresponds to the position of each row of rods 42 , the number of roller assemblies 12 (the number refers to the number of pairs) is equal to the number of grooves 6 and the positions correspond one to one, or the roller assemblies 12 are a pair and are arranged at the lower part of the slide rail 3 .

[0026] A foot plate 8 may be provided at the lower end of the column 41 , and the length and width of the foot plate 8 should be equal to or slightly larger than the cross section of the slide rail 3 .

[0027] Beneficial effects of the present invention: While the present invention can safely and conveniently reach the roof for maintenance work, it can also reduce the potential safety hazards caused by random climbing by personnel. Specifically, 1) it is easy to install. The push-pull ladder section is made of the same material and has the same width as the original ladder at the upper end. The finished product can be assembled by installing the matching slide rail. 2) It has good safety. When the push-pull ladder to the roof is not used daily, the push-pull ladder section can be retracted and fixed and locked with the original ladder section through the low-end perforations to reduce the risk of random climbing by personnel. It uses a mature mechanical connection method and is safe and stable during daily convenient use. 3) It saves costs. The materials used are consistent with the original ladder section. Only a slide rail space and a metal clip component are added to the original ladder section. 4) It saves effort. The roller assembly can be used to intermittently push up the sliding frame, and you can rest in the middle to save physical strength. The anti-fall function of the roller assembly prevents the sliding ladder from causing harm to the staff.

[0028] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A roof manhole climbing ladder, comprising a fixed ladder (1) mounted on the lower side wall surface of the roof manhole, the fixed ladder (1) comprising a plurality of steps, characterized in that: A sliding ladder (2) is arranged outside the steps, and the sliding ladder (2) comprises a slide rail (3) and a ladder plate (4). The slide rail (3) is made of two U-shaped channel steels, the notches of which are arranged opposite to each other and fixed to the two sides of the outer ends of the steps (4). The left side walls (32) and the right side walls (33) at the lower ends of the two U-shaped channel steels are provided with through holes (10); The ladder plate (4) comprises two columns (41), the two columns (41) are connected by a plurality of rows of rods (42), the columns (41) are slidably mounted in the U-shaped channel steel, and the lower ends of the columns (41) are provided with through holes (7); A padlock (11) is mounted on the through hole (10) and the through hole (7).

2. The roof manhole climbing ladder according to claim 1, characterized in that: The inner surface of the rear side wall (31) at the lower end of the slide rail (3) is fixedly connected to a limiting block (9), and the outer side surface of the column (41) is fixedly connected to a tongue (5), which falls on the limiting block (9).

3. The roof manhole climbing ladder according to claim 1, characterized in that: Both ends of the through hole (7) are bell mouths, and the diameter of the through hole (10) is larger than the bell mouths.

4. The roof manhole climbing ladder according to claim 1, characterized in that: A plurality of grooves (6) are symmetrically arranged on the outer wall of the column (41), the grooves (6) having a deepest point, and the deepest point is connected to the outer wall of the column (41) via an inclined surface; a roller assembly (12) is arranged on the outer side of the groove (6), and the roller assembly (12) is connected to the left side wall (32) or the right side wall (33) of the slide rail (3) via an elastic mounting seat.

5. The roof manhole climbing ladder according to claim 4, characterized in that: The position of the groove (6) corresponds to the position of each row of rods (42), the number of roller assemblies (12) is equal to the number of grooves (6) and the positions correspond one to one, or the roller assemblies (12) are a pair and are arranged at the bottom of the slide rail (3).

6. The roof manhole climbing ladder according to claim 4, characterized in that: The roller assembly (12) comprises a fixed frame (124), a sliding frame (122), a spring (123) and a roller (121); the fixed frame (124) is welded or bolted to the side wall of the slide rail (3); a guide rod is fixed to the side surface of the fixed frame (124); the spring (123) is sleeved on the guide rod; a sliding hole is provided in the sliding frame (122) corresponding to the guide rod; the sliding frame (122) is mounted on the outside of the spring (123); the outside of the sliding frame (122) is fixedly connected to a support plate; and the roller (121) is mounted on the outer end of the support plate.

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