CN219931752U

CN219931752U - Assembled cat ladder

Info

Publication number: CN219931752U
Application number: CN202321276241.XU
Authority: CN
Inventors: 李伟力; 何科君
Original assignee: Ningbo Construction Group Co Ltd
Current assignee: Ningbo Construction Group Co Ltd
Priority date: 2023-05-24
Filing date: 2023-05-24
Publication date: 2023-10-31
Anticipated expiration: 2033-05-24

Abstract

The utility model relates to the field of building construction, in particular to an assembled crawling ladder. The utility model provides an assembled ladder stand, which comprises a side beam, a step plate and a platform plate detachably connected to the tail end of the side beam, wherein the bottom of the platform plate is provided with a platform support for supporting the platform plate, the side beam comprises a first-section side beam fitting, a standard side beam fitting and a tail-section side beam fitting, and connecting holes are formed at two ends of the first-section side beam fitting, the standard side beam fitting and the tail-section side beam fitting; the platform support comprises a top support rod piece, a standard support rod piece and a bottom support rod piece, wherein the two ends of the top support rod piece are respectively provided with a platform connecting part and a standard connecting part A, the two ends of the bottom support rod piece are respectively provided with a ground connecting part and a standard connecting part B, and the two ends of the standard support rod piece are respectively provided with a standard connecting part C. The utility model has the advantages that the climbing ladder is provided with the climbing ladder platform, the side beams can be further split into smaller units, and the length of the side beams and the supporting height of the platform can be adjusted.

Description

Assembled cat ladder

Technical Field

The utility model relates to the field of building construction, in particular to an assembled crawling ladder.

Background

In the engineering field, especially in the construction process of building construction, places involving high and low spans are very many, such as foundation pits, indoor and outdoor height differences before outdoor backfilling, height differences between a top plate and a main building, height differences between a tower crane and the ground, and the like. In such a place where the height difference exceeds 300 a, a boarding passage needs to be provided in consideration of the practical use function and safety convenience.

The common boarding passage at the present construction site adopts a wood cat ladder, a steel pipe or a masonry step. These approaches have their own drawbacks. The safety and durability of the wood ladder are poor, and the image is also extremely poor; the steel pipe is most conventional in erection, but has strong specialization, is complicated in erection, has poor appearance without further beautifying, and has higher cost if a template is further paved and spray painting cloth is arranged; the building steps have good image, but the cost is extremely high, and the building steps are not applicable to construction sites with the height difference of more than 2 meters.

In order to solve the problems in the prior art, the utility model patent with the authority bulletin number of CN216894218U discloses an assembled temporary crawling ladder, which comprises two pairs of side arms and a multi-stage ladder step arranged between the two pairs of side arms; the side arm is a prefabricated member and comprises a side beam, a bottom mounting plate and a top mounting plate, wherein the top mounting plate is arranged at the top end of the side beam along the length direction of the side beam, the bottom mounting plate is arranged at the bottom end of the side beam, and the top mounting plate and the bottom mounting plate are both positioned at the outer side of the side beam; the top mounting plate is vertically arranged, and a bolt groove with a downward opening is formed in the top mounting plate; the bottom mounting plate is horizontally arranged, and a round bolt hole is formed in the bottom mounting plate; the step is a prefabricated member, and two ends of the prefabricated member are detachably connected with the corresponding side beams respectively. The temporary ladder is a prefabricated member which can be mutually assembled, is convenient to install, attractive in appearance and capable of being repeatedly used.

Such temporary ladders have limitations. Although each part of the structure can be detached and installed, compared with the step for building, the side beam is good in image, convenient, practical and cost-saving, but the side beam is integral and cannot be detached further. When the height difference of the occasion needing to be arranged is large, the transportation difficulty of the side beams is increased, and the side beams are easy to bend, deform and the like in the transportation process. And the temporary crawling ladder only comprises a step part, and needs to be erected by using a platform at an elevation.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides an assembled ladder which is provided with a ladder stand platform, wherein a side beam can be further split into smaller units, and the length of the side beam and the supporting height of the platform can be adjusted.

The utility model provides an assembled cat ladder, which adopts the following technical scheme:

the assembled crawling ladder comprises a side beam, a step plate and a platform plate, wherein the step plate is arranged on the side beam, the platform plate is detachably connected to the tail end of the side beam, the bottom of the platform plate is provided with a platform support for supporting the platform plate, the side beam comprises a first-section side beam fitting, a standard side beam fitting and a tail-section side beam fitting, and connecting holes are formed in two ends of the first-section side beam fitting, the standard side beam fitting and the tail-section side beam fitting; the platform support comprises a top support rod piece, a standard support rod piece and a bottom support rod piece, wherein the two ends of the top support rod piece are respectively provided with a platform connecting part and a standard connecting part A, the two ends of the bottom support rod piece are respectively provided with a ground connecting part and a standard connecting part B, and the two ends of the standard support rod piece are provided with a standard connecting part C.

The side beam comprises a first-section side beam fitting, a standard side beam fitting and a tail-section side beam fitting, so that the side beam can be detached. When the side beam assembly is used in construction, the first-section side beam assembly, the standard side beam assembly and the tail-section side beam assembly can be respectively transported to the site and assembled and connected at the required position. After the use, the first-section side beam fittings, the standard side beam fittings and the tail-section side beam fittings can be detached respectively for turnover.

And through setting up first section curb girder accessory, standard curb girder accessory and tail end curb girder accessory, can adjust the length of whole curb girder through the quantity of the standard curb girder accessory of adjusting the curb girder, at the shortest time, can only use first section curb girder accessory and tail end curb girder accessory, realized the nimble regulation of curb girder length adaptation construction scene.

Through setting up the platform board for this cat ladder's setting environment is further loose, has reduced the requirement in the construction environment when this cat ladder is set up, has improved this cat ladder's practicality.

And the platform support for supporting the platform plate also includes a top support bar, a standard support bar, and a bottom support bar. Similar to the side sill length adjustment, the platform support may also be adjustable in length by adjusting the number of standard support bars. And the length relation between the standard support rod piece and the standard side beam fitting can be determined, so that the angle relation between the platform support and the side beam is unchanged when the measuring length and the standard support rod piece are adjusted by increasing or decreasing the standard side beam fitting and the standard support rod piece, and the stability and the practicability of the cat ladder can be further improved.

Preferably, the first-section side beam fitting, the standard side beam fitting and the tail-section side beam fitting are connected by a connecting sleeve, and the connecting sleeve comprises a connecting plate provided with a connecting plate hole and a connecting piece arranged in the connecting plate hole.

The connecting sleeve comprises the connecting plate and the connecting piece, so that uneven side beams are avoided when the connecting sleeve is directly connected through the connecting hole, the distance between the side beams at the two sides after the mounting of the crawling ladder is equal, and the subsequent mounting of the stepping is facilitated. Moreover, the connecting plates are adopted to ensure that the force of the connecting piece is not completely born by the side beams, so that the ladder, particularly the position of the connecting hole of the side beams, is avoided in the using process, and the stability and the practicability of the ladder are further improved because the connecting holes are damaged due to overlarge load and concentrated stress.

Preferably, the handrail assembly further comprises a handrail upright post arranged at two ends of the side beam and a handrail rod arranged on the handrail upright post.

Through setting up the handrail subassembly, can let the cat ladder more convenient and safe in the use, guarantee the installation performance of this cat ladder, reduce construction risk.

Preferably, the armrest assembly is detachably connected to the side member.

Through setting up to dismantle the connection between handrail subassembly and the curb girder for when carrying and turnover, the handrail subassembly can break away from the independent transportation of curb girder, and when the damage takes place for handrail subassembly or curb girder, can change alone, shortens construction time, saves construction cost, has improved the practicality of this cat ladder.

Preferably, the handrail upright post is detachably connected with the handrail rod.

The handrail stand column and the handrail rod are detachably connected, so that the handrail stand column and the handrail rod can be transported independently in the process of carrying and turnover, and when the handrail stand column or the handrail rod is damaged, the handrail stand column or the handrail rod is replaced independently, so that the construction time is shortened, the construction cost is saved, and the practicability of the cat ladder, especially the cat ladder handrail is improved.

Preferably, the step plate comprises a square step plate frame and a step cross bar arranged on the inner side of the step plate frame, and the step plate frame consists of four step frame bars.

Through setting up frame pole and the horizontal pole of marking time, can make the flier be providing sufficient holding power and holding area in the middle of, leave the space. Because the ground of the construction site often carries earth, and rainy weather may occur. In this case, sediment and accumulated water are left on a whole pedal plate for a long time, so that the corrosion damage of the pedal plate can be accelerated. By ensuring that a gap is reserved in the middle of the pedal, the surface of the pedal can be kept clean and dry as much as possible, the corrosion damage of the pedal is slowed down, and the durability of the cat ladder is improved.

Preferably, the step plate frame is provided with mounting holes penetrating the step plate frame bars on opposite sides thereof, and the step plate frame is connected to the side members by mounting members penetrating the mounting holes.

Through making the mounting hole run through the frame pole of marking time, can be so that can set up the screw rod in the mounting hole to the inboard of frame pole of marking time and the outside of curb girder set up the nut, realize detachable fastening between tread and the curb girder, the installation effect is firm, can reduce the possibility that takes place to break away from between tread and the curb girder, improves the security of construction.

Preferably, the platform connection part comprises a platform connection supporting piece arranged at the end part of the top support rod piece, and a platform connection hole is formed in the platform connection supporting piece.

By arranging the platform connecting supporting piece, the top supporting rod piece can be connected to the platform plate in various modes. If the prefabricated screw on the platform passes through the platform connecting hole on the platform connecting support piece, the other side of the platform connecting support piece is fastened by using a bolt, or the position of the bottom of the platform corresponding to the platform connecting support piece is also perforated, and then the connection between the top supporting rod piece and the platform plate is realized by using connecting pieces such as expansion bolts, so that the connection is more stable and reliable.

Preferably, the ground connection part includes a ground connection bracket provided at an end of the bottom support bar, and the ground connection bracket is provided with a ground connection hole.

Through setting up ground connection bracket, can make the bottom sprag member connect on the floor plate through multiple mode. If pass through the ground connecting hole on the connection support piece through subaerial screw that presets and use the bolt-up in the opposite side of ground connection support piece, perhaps also trompil in the position that ground bottom and ground connection support piece correspond, later use connecting piece such as expansion bolts to realize being connected between bottom support member and the floor panel, make the connection more firm reliable.

Preferably, the standard connection part A is a standard connection support piece A arranged at the end part of the top support rod piece, the standard connection part B is a standard connection support piece B arranged at the end part of the bottom support rod piece, the standard connection part C is a standard connection support piece C arranged at two ends of the standard support rod piece, and the standard connection support piece A, the standard connection support piece B and the standard connection support piece C are all provided with connection holes with corresponding positions.

Through setting up standard connection support piece A, standard connection support piece B and standard connection support piece C, can make when needs carry out the erection joint with top support member, standard support member and bottom support member, use the connecting piece to install standard connection support piece A, standard connection support piece B and standard connection support piece C after aligning can. The surface of the installed platform support is continuous and smooth, the supporting force is good, and the load from the platform is conducted and born by the standard connection support sheet A, the standard connection support sheet B and the standard connection support sheet C through the standard connection support sheet A, the possibility that the connection part of the standard connection support sheet B and the standard connection support sheet C is damaged due to overlarge stress can be reduced, so that the safety of the crawling ladder is improved.

By implementing the technical scheme, the utility model has the following beneficial effects:

the structure is simple and reliable, the construction operation of being convenient for can effectively provide support and step up and down, and is not fragile, and each part all can be convenient dismantlement, change and use, and is few to the demand that sets up the environment, uses in a flexible way, and required space is littleer when turnover.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an overall view of an assembled ladder according to one embodiment of the utility model;

FIG. 2 is a detail view of a platform support of an assembled ladder according to an embodiment of the utility model;

FIG. 3 is a detailed view of a platform connection of a fabricated ladder according to an embodiment of the utility model;

FIG. 4 is a detail view of the ground connection of a modular ladder according to one embodiment of the utility model;

FIG. 5 is a detail view of a standard connection of a modular ladder according to one embodiment of the utility model;

FIG. 6 is a detail view of a first-section side sill assembly of a fabricated ladder according to an embodiment of the utility model;

FIG. 7 is a detail view of a tail end side rail assembly of a fabricated ladder according to one embodiment of the utility model;

FIG. 8 is a detail view of a standard side sill assembly of a fabricated ladder according to an embodiment of the utility model;

FIG. 9 is a detail view of a connection kit of a fabricated ladder according to an embodiment of the utility model;

FIG. 10 is a detailed view of a tread of an assembled ladder stand according to one embodiment of the utility model;

FIG. 11 is a front view of a platform plate of an assembled ladder according to an embodiment of the utility model;

fig. 12 is a side view of a platform plate of a fabricated ladder stand according to an embodiment of the utility model.

Wherein: a side beam 1; a tread plate 2; a platform plate 3; a platform support 31; a first-stage side member fitting 11; standard side rail fittings 12; tail end side beam fittings 13; top support bar 311; standard support bars 312; a bottom support bar 313; a platform connection 3111; standard connection a3112; standard connection B3121; standard connection C3131; a ground connection 3132; a connection kit 14; a connection plate 141; a handrail assembly 4; a handrail upright 41; a grab rail 42; a step plate frame 21; a step frame bar 211; a step rail 22; a mounting hole 212; the platform is connected with a bracket 31111; the ground connection bracket 31321; standard connection blade a31121; standard attachment tabs B31211; standard connection tabs C31311.

Detailed Description

The utility model is described in further detail below with reference to the drawings and to specific embodiments.

It should be noted that the following embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Example 1

The embodiment provides an assembled cat ladder, and the specific structure is as follows:

comprising a side beam 1, a step plate 2 for being arranged on the side beam 1, and a platform plate 3 for being arranged at the end of the side beam 1.

The side sill 1 includes a head side sill fitting 11, a standard side sill fitting 12, and a tail side sill fitting 13, and connection holes are provided in each of the head side sill fitting 11, the standard side sill fitting 12, and the tail side sill fitting 13. Wherein the angle between the entire side sill 1 and the ground and platform plate 3 can be changed by changing the angle between the two parallel sides of the end side sill fitting 13 and the side contacting the ground and the angle between the two parallel sides of the head side sill fitting 11 and the side contacting the platform plate 3. In this embodiment, the acute angle between the side beam 1 and the ground is 45 °, so that the ratio of the horizontal projection length of the side beam 1 to the vertical projection length of the side beam 1 is 1:1.

the head side member fitting 11, the standard side member fitting 12 and the tail side member fitting 13 are connected by a connection sleeve 14. The connection sleeve 14 is a connection plate 141, and a connection plate hole is formed in the connection plate 141. In connection, the connection plate holes are aligned with the connection holes of the head side member fitting 11, the standard side member fitting 12, and the tail side member fitting 13, and then the connection members are attached to each other to connect the head side member fitting 11, the standard side member fitting 12, and the tail side member fitting 13. In this embodiment, the connecting member is a bolt. In this embodiment, the first-stage side member fitting 11 and the second-stage side member fitting 13 are further provided with armrest connecting holes for mounting the armrest assembly 4.

The step plate 2 is of any structure and form that can be attached to the side member 1 and that can provide a certain supporting force and supporting area. In this embodiment, the step plate 2 includes a square step plate frame 21 and a step cross bar 22 provided inside the step plate frame 21. In this embodiment, the tread rail 22 is a rail. The step plate frame 21 is composed of four step frame bars 211. The step plate 2 may be provided on the side member 1 by any stable connection. In this embodiment, mounting holes 212 penetrating the step frame bar 211 are provided in two step frame bars 211 near the side member 1 at the time of mounting. There are no fewer than two mounting holes 212 on the same side, in this embodiment, two mounting holes 212 on each side.

The platform plate 3 is provided at the distal end of the side member 1, and a platform support 31 for supporting the platform plate 3 is provided below. The platform plate 3 may be of any shape, material and structure capable of providing a supporting force and a supporting area. In this embodiment, the platform plate 3 is a square steel plate, square steel frames with the same size as the platform plate 3 are arranged around the bottom of the platform plate 3, and a pair of platform plate steel beams which are mutually perpendicular and crossed and are respectively perpendicular to the edges of the connected steel frames are arranged between the steel frames. The side edges of the platform plate 3 are also provided with side beam connecting plates which are mutually installed with the side beams 1, and the side beam connecting plates and the first section of side beam fittings 11 are provided with holes with matched positions and can be installed through connecting pieces. In this embodiment, the platform board 3 is further provided with a platform guard rail.

The platform supports 31 are support bars. The support rod may be any shape and structure capable of providing a certain supporting force, and in this embodiment, the support rod is a square steel tube. In this embodiment, there are four support bars, which are located at the four corners of the square platform plate 3, respectively. The platform support 31 includes a top support bar 311, a standard support bar 312, and a bottom support bar 313. Similar to the head side rail fitting 11, the standard side rail fitting 12, and the tail side rail fitting 13 of the side rail 1, the height of the platform support 31 can be adjusted by adjusting the number of standard support bars 312 in the platform support 31. In this embodiment, the ratio of the length of the standard support rod 312 to the length of the standard side sill fitting 12 is 1:1.414.

one end of the top support bar 311 is provided with a platform connection part 3111 for connecting to the bottom of the platform plate 3, in this embodiment, the platform connection part 3111 is a platform connection bracket 31111, and the platform connection bracket 31111 is provided with a platform connection hole. One end of the bottom support member 313 is provided with a ground connection portion 3132 for connecting with a plane, in this embodiment, the ground connection portion 3132 is a ground connection bracket 31321, and the ground connection bracket 31321 is provided with a ground connection hole. The other end of the top support bar 311 is provided with a standard connection part a3112 for connection with the standard support bar 312, the other end of the bottom support bar 313 is provided with a standard connection part B3121 for connection with the standard support bar 312, and both ends of the standard support bar 312 are provided with standard connection parts C3131. In this embodiment, the standard connection portion a3112, the standard connection portion B3121, and the standard connection portion C3131 are connection tabs provided at the ends of the rod, and are respectively the standard connection tab a31121, the standard connection tab B31211, and the standard connection tab C31311. The standard connection support piece A31121, the standard connection support piece B31211 and the standard connection support piece C31311 are provided with connection holes corresponding to the positions.

The armrest assembly 4 includes an armrest upright 41 and an armrest rod 42 disposed on the armrest upright 41. In this embodiment, the armrest pillar 41 and the armrest rod 42 are detachably connected. In this embodiment, the armrest pillar 41 is detachably connected to the side member 1.

Example 2

The side sill 1 includes a head side sill fitting 11, a standard side sill fitting 12, and a tail side sill fitting 13, and connection holes are provided in each of the head side sill fitting 11, the standard side sill fitting 12, and the tail side sill fitting 13. Wherein the angle between the entire side sill 1 and the ground and platform plate 3 can be changed by changing the angle between the two parallel sides of the end side sill fitting 13 and the side contacting the ground and the angle between the two parallel sides of the head side sill fitting 11 and the side contacting the platform plate 3. In the present embodiment, the ratio of the horizontal projection length of the side member 1 to the vertical projection length of the side member 1 is 1:2.

the first-stage side rail fitting 11, the standard side rail fitting 12, and the tail-stage side rail fitting 13 are directly connected to each other. In connection, the connection between the first-stage side rail fitting 11, the standard side rail fitting 12, and the tail-stage side rail fitting 13 is achieved by fitting the connectors after aligning the connection holes of the first-stage side rail fitting 11, the standard side rail fitting 12, and the tail-stage side rail fitting 13 with each other. In this embodiment, the connecting member is a bolt. In this embodiment, the first-stage side member fitting 11 and the second-stage side member fitting 13 are further provided with armrest connectors for mounting the armrest assembly 4.

The step plate 2 is of any structure and form that can be attached to the side member 1 and that can provide a certain supporting force and supporting area. In this embodiment, the tread plate 2 is a one-piece square steel plate. In this embodiment, the tread support pieces for mounting the tread plate 2 are provided on both side edges of the tread plate 2 near the side member 1 at the time of mounting. The number of the stepping support pieces on the same side is not less than two, and in the embodiment, each side is provided with two stepping support pieces.

The platform plate 3 is provided at the distal end of the side member 1, and a platform support 31 for supporting the platform plate 3 is provided below. The platform plate 3 may be of any shape, material and structure capable of providing a supporting force and a supporting area. In this embodiment, the platform plate 3 is a square steel plate, square steel frames with the same size as the platform plate 3 are arranged around the bottom of the platform plate 3, and a pair of platform plate steel beams which are mutually perpendicular and crossed and are respectively perpendicular to the edges of the connected steel frames are arranged between the steel frames. The side edges of the platform plate 3 are also provided with side beam connecting plates which are mutually installed with the side beams 1, and the side beam connecting plates and the first section of side beam fittings 11 are provided with holes with matched positions and can be installed through connecting pieces.

The platform supports 31 are support bars. The support rod may be any shape and structure capable of providing a certain supporting force, and in this embodiment, the support rod is a round steel tube. In this embodiment, there are four support bars, which are located at the four corners of the square platform plate 3, respectively. The platform support 31 includes a top support bar 311, a standard support bar 312, and a bottom support bar 313. Similar to the head side rail fitting 11, the standard side rail fitting 12, and the tail side rail fitting 13 of the side rail 1, the height of the platform support 31 can be adjusted by adjusting the number of standard support bars 312 in the platform support 31. In this embodiment, the ratio of the length of the standard support rod 312 to the length of the standard side sill fitting 12 is 1:1.12.

one end of the top support rod 311 is provided with a platform connection part 3111 for connecting with the bottom of the platform, in this embodiment, the platform connection part 3111 is a platform connection bracket 31111, and the platform connection bracket 31111 is provided with a platform connection hole. One end of the bottom support member 313 is provided with a ground connection portion 3132 for connecting with a plane, in this embodiment, the ground connection portion 3132 is a ground connection bracket 31321, and the ground connection bracket 31321 is provided with a ground connection hole. The other end of the top support bar 311 is provided with a standard connection part a3112 for connection with the standard support bar 312, the other end of the bottom support bar 313 is provided with a standard connection part B3121 for connection with the standard support bar 312, and both ends of the standard support bar 312 are provided with standard connection parts C3131. In this embodiment, the standard connection portion a3112, the standard connection portion B3121, and the standard connection portion C3131 are connection tabs provided at the ends of the rod, and are respectively the standard connection tab a31121, the standard connection tab B31211, and the standard connection tab C31311. The standard connection support piece A31121, the standard connection support piece B31211 and the standard connection support piece C31311 are provided with connection holes corresponding to the positions.

The armrest assembly 4 includes an armrest upright 41 and an armrest rod 42 disposed on the armrest upright 41. In this embodiment, the armrest pillar 41 and the armrest rod 42 are detachably connected. In this embodiment, the armrest pillar 41 is fixedly connected to the side member 1.

The applicant declares that the above is only a specific embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and it should be apparent to those skilled in the art that any changes or substitutions that are easily conceivable within the technical scope of the present utility model disclosed by the present utility model fall within the scope of the present utility model and the disclosure.

Claims

1. The assembled crawling ladder comprises a side beam (1), a step plate (2) arranged on the side beam (1) and a platform plate (3) arranged at the tail end of the side beam (1), wherein a platform support (31) used for supporting the platform plate (3) is arranged at the bottom of the platform plate (3), and the assembled crawling ladder is characterized in that the side beam (1) comprises a first-section side beam fitting (11), a standard side beam fitting (12) and a tail-section side beam fitting (13), and connecting holes are formed in two ends of the first-section side beam fitting (11), the standard side beam fitting (12) and the tail-section side beam fitting (13); the platform support (31) comprises a top support rod (311), a standard support rod (312) and a bottom support rod (313), wherein a platform connecting part (3111) and a standard connecting part A (3112) are respectively arranged at two ends of the top support rod (311), a ground connecting part (3132) and a standard connecting part B (3121) are respectively arranged at two ends of the bottom support rod (313), and a standard connecting part C (3131) is arranged at two ends of the standard support rod (312).

2. A modular ladder according to claim 1, characterized in that the head-section side rail fittings (11), the standard side rail fittings (12) and the tail-section side rail fittings (13) are connected by means of connection fittings (14), the connection fittings (14) comprising connection plates (141) provided with connection plate holes, and connection members arranged in the holes of the connection plates (141).

3. A modular ladder according to claim 1, further comprising a handrail assembly (4), said handrail assembly (4) comprising handrail uprights (41) arranged at both ends of said side beams (1) and handrail bars (42) arranged on said handrail uprights (41).

4. A modular ladder according to claim 3, characterized in that the arm rest assembly (4) is detachably connected to the side sill (1).

5. A modular ladder according to claim 3, characterised in that the handrail upright (41) is detachably connected to the handrail bar (42).

6. A modular ladder according to claim 1, characterized in that the tread plate (2) comprises a square tread plate frame (21) and tread bars (22) arranged inside the tread plate frame (21), the tread plate frame (21) being composed of four tread plate frame bars (211).

7. A modular ladder according to claim 6, wherein the tread frame (21) is provided with mounting holes (212) extending through the tread frame bars (211) on opposite sides thereof, the tread frame (21) being connected to the side members (1) by means of mounting elements extending through the mounting holes (212).

8. A modular ladder according to claim 1, wherein the platform connection (3111) comprises a platform connection tab (31111) arranged at an end of the top support bar (311), the platform connection tab (31111) being provided with a platform connection aperture.

9. A modular ladder according to claim 1, wherein the ground connection portion (3132) comprises ground connection lugs (31321) provided at the ends of the bottom support bar (313), the ground connection lugs (31321) being provided with ground connection holes.

10. The assembled ladder stand according to claim 1, characterized in that the standard connection part a (3112) is a standard connection bracket a (31121) disposed at an end of the top support bar (311), the standard connection part B (3121) is a standard connection bracket B (31211) disposed at an end of the bottom support bar (313), the standard connection part C (3131) is a standard connection bracket C (31311) disposed at two ends of the standard support bar (312), and the standard connection bracket a (31121), the standard connection bracket B (31211) and the standard connection bracket C (31311) are each provided with connection holes corresponding in position.