Building stretchable plate ladder

Abstract

The utility model relates to the technical field of building stretchable plate ladders, and discloses a building stretchable plate ladder which comprises a ladder assembly, supporting legs fixedly connected with the lower side of the ladder assembly, idler wheels rotationally connected with the interiors of the supporting legs and a push handle fixedly connected with one side of the ladder assembly. The stretching mechanism is arranged on the outer side of the telescopic mechanism and comprises limiting frames, the limiting frames are fixedly connected to the two sides of the ladder frame, sleeve plates are fixedly connected to the inner sides of the limiting frames, connecting rods are rotationally connected to the left ends of the sleeve plates, and the lower sides of the connecting rods are rotationally connected with connecting bases and extending bases correspondingly; a stabilizing rod is rotationally connected between the right end of the connecting base and the middle of the sleeve plate, the multiple connecting rods and the multiple extending bases are arranged, the stretching mechanism is used for driving the telescopic mechanism to conduct unfolding and folding work, use by a user is facilitated, the telescopic mechanism is used for stretching and retracting, and the stability can be kept while the stretching distance is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building stretchable board ladder, concretely to a building stretchable board ladder. BACKGROUND

[0002] The building stretchable board ladder is a construction tool combining adjustability and portability, which is designed to adapt to different height requirements and improve work efficiency. From the structure, this type of ladder usually adopts a combination of main ladder beams and telescopic units, such as connecting the diagonal support beam through the rotating shaft, and using the included angle adjusting unit to control the angle of the ladder to enhance the stability. Some designs also contain a multi-stage board ladder structure, such as the first board ladder and the second board ladder achieving height adjustment through the connecting frame and the locking mechanism, in which the clamping mechanism of the fixed rod and the limiting clamping teeth can quickly adjust the ladder length, and the torsional spring keeps the automatic reset function, ensuring the convenience and safety of operation. In addition, some board ladders use a telescopic principle similar to a fishing rod, such as an engineering telescopic ladder that can be stretched to more than 6 meters, folded to only 0.6-1 meter, convenient to carry and support the switch between the ladder and the straight ladder, meeting the needs of different scenarios. In terms of functional innovation, some models introduce a detachable telescopic rod and a containing groove design, which can be fixed by tightening the bolt to achieve modular expansion, and the bottom is equipped with universal wheels to improve the convenience of movement. In terms of safety performance, anti-skid foot covers, balance bars, and high-load pedals (such as more than 150 kg) are standard, and elastic locking mechanisms prevent accidental disconnection caused by misoperation, such as the structure of the sleeve and the limiting rod combined with the spring to strengthen the fixing effect. This type of ladder is widely used in construction sites, power repair, garden maintenance, and other fields, and is made of high-strength steel or aluminum alloy, which not only reduces weight but also ensures durability, significantly replacing traditional scaffolding, reducing construction cost and time.

[0003] However, the existing stretchable ladder board is roughly divided into single-track and double-track types. The single-track usually needs to be supported by a wall or the like, which has poor stability, while the double-track is difficult to stretch and retract, thus the extendable distance is greatly limited, which is difficult to meet the needs. Therefore, a stretchable ladder board that combines the advantages of single-track and double-track is needed to meet the needs. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a building stretchable board ladder to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a building stretchable board ladder, comprising a ladder frame, a support leg fixedly connected to the lower side of the ladder frame, a roller rotatably connected inside the support leg, and a push handle fixedly connected to one side of the ladder frame, wherein the lower side of the ladder frame is provided with a stretching mechanism and a telescopic mechanism, and the stretching mechanism is arranged outside the telescopic mechanism.

[0006] The stretching mechanism comprises a limiting frame fixedly connected on both sides of the ladder frame, a sleeve plate fixedly connected to the inner side of the limiting frame, a connecting rod rotatably connected to the left end of the sleeve plate, a connecting seat and an extension seat rotatably connected to the lower side of the connecting rod respectively, a stabilizing rod rotatably connected between the right end of the connecting seat and the middle part of the sleeve plate, and a plurality of connecting rods and extension seats, wherein the connecting rods are rotatably connected to the left, middle and right ends of the extension seats from top to bottom, a base is rotatably connected to the lower end of the connecting rod, a bottom rod is rotatably connected to the middle side of the base, and the upper end of the bottom rod is rotatably connected to the left end of the extension seat.

[0007] Preferably, one end of the connecting seat is provided with a notch.

[0008] Preferably, the connecting seat, the extension seat and the base are all provided with notches on the left, middle and right sides thereof.

[0009] Preferably, the connecting rod is longer than the stabilizing rod and the bottom rod.

[0010] Preferably, the telescopic mechanism comprises a rotating table rotatably connected to the inner lower side of the ladder frame, a telescopic cylinder slidably connected to the inside of the rotating table, a secondary cylinder slidably connected to the inside of the telescopic cylinder, a tertiary cylinder slidably connected to the inside of the secondary cylinder, a quaternary cylinder slidably connected to the inside of the tertiary cylinder, a threaded table fixedly connected to the inside of each of the secondary cylinder, the tertiary cylinder and the quaternary cylinder, a motor fixedly connected to the inside of the telescopic cylinder, a stud fixedly connected to the output end of the motor, the stud being threadedly connected to the threaded table in the inside of the secondary cylinder, a secondary threaded sleeve slidably connected to the outer wall of the stud, the secondary threaded sleeve being rotatably connected to the outer wall of the threaded table in the inside of the secondary cylinder, the secondary threaded sleeve being threadedly connected to the threaded table in the inside of the tertiary cylinder, a tertiary threaded sleeve slidably connected to the outer wall of the secondary threaded sleeve, the tertiary threaded sleeve being rotatably connected to the outer wall of the threaded table in the inside of the tertiary cylinder, the tertiary threaded sleeve being threadedly connected to the threaded table in the inside of the quaternary cylinder, a limiting strip fixedly connected to the inside of each of the secondary cylinder, the tertiary cylinder, the secondary threaded sleeve and the tertiary threaded sleeve, and a limiting groove formed in the inside of each of the secondary cylinder, the tertiary cylinder, the quaternary cylinder, the stud and the secondary threaded sleeve.

[0011] Preferably, the limiting strips and the limiting grooves are slidably connected.

[0012] Preferably, a hanging ring structure is fixedly connected to the end of the quaternary cylinder, and the hanging ring structure is rotatably connected to the inside of the connecting seat.

[0013] Compared with the prior art, the building stretchable plate ladder has the following beneficial effects:

[0014] The stretching mechanism is used for driving the telescopic mechanism to expand and retract, and the mechanism utilizes multi-stage telescoping to reduce the occupied space and improve the stretching distance, so that the telescopic mechanism can be expanded farther, and thus the stretching property of the device is improved, facilitating user use.

[0015] The telescopic mechanism is used for extension and contraction, and is different from the existing telescopic sliding structure, so that the mechanism can be stacked with multiple plate ladders to freely set the extension distance, and the mechanism can form a triangular structure with the ground through symmetric arrangement to ensure the extension distance and maintain stability. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is a structural schematic view of the present application;

[0018] Figure 2 is a structural schematic view of the present application from another perspective;

[0019] Figure 3 is a sectional structural schematic view of the present application;

[0020] Figure 4 is a structural schematic view of the connecting rod in the present application;

[0021] Figure 5 is a structural schematic view of the telescopic cylinder in the present application.

[0022] In the figure: 1, ladder frame; 2, supporting leg; 3, roller; 4, push handle; 5, extension mechanism; 501, limiting frame; 502, cover plate; 503, connecting rod; 504, connecting seat; 505, extension seat; 506, stabilizing rod; 507, base; 508, bottom rod; 6, telescopic mechanism; 601, rotating table; 602, telescopic cylinder; 603, second-stage cylinder; 604, third-stage cylinder; 605, fourth-stage cylinder; 606, threaded table; 607, motor; 608, stud; 609, second-stage threaded sleeve; 610, third-stage threaded sleeve; 611, limiting strip; 612, limiting groove. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can be indirectly connected through intermediate medium, can be the intercommunication of two elements or the interaction of two elements.For the ordinary skill in the art, the above terms can be understood according to the specific meaning of the utility model. Embodiment

[0025] The mechanism is used to assist the extension of the telescopic mechanism 6, and the mechanism solves the problem that stability and extension of the existing ladder frame 1 cannot exist simultaneously, please refer to Figures 1-5 The utility model provides a technical scheme: a building stretchable board ladder, including ladder frame 1, the fixed connection of the lower side of ladder frame 1 support leg 2, the inside rotary connection of support leg 2 gyro wheel 3 and the fixed connection of the one side of ladder frame 1 push handle 4, the lower side of ladder frame 1 is provided with extension mechanism 5 and telescopic mechanism 6, and extension mechanism 5 is set up outside telescopic mechanism 6;

[0026] Extension mechanism 5 includes limiting frame 501, limiting frame 501 is fixedly connected on both sides of ladder frame 1, limiting frame 501 inside fixedly connected with sleeve plate 502, sleeve plate 502 left end rotary connection has connecting rod 503, connecting rod 503 lower side is rotaryly connected with connecting seat 504 and extension seat 505 respectively, connecting seat 504 right end is rotaryly connected with the middle part between sleeve plate 502, and connecting rod 503 and extension seat 505 are provided with multiple, connecting rod 503 is rotaryly connected with the left, middle and right end of extension seat 505 in turn from top to bottom, and connecting rod 503 lower end rotaryly connected with base 507, base 507 middle side rotaryly connected with bottom rod 508, and bottom rod 508 upper end is rotaryly connected with the left end of extension seat 505.

[0027] Further, one end of connecting seat 504 is provided with a notch.

[0028] Further, connecting seat 504, extension seat 505 and base 507 are provided with notches on the left, middle and right sides.

[0029] Further, connecting rod 503 is longer than stable rod 506 and bottom rod 508. Embodiment

[0030] The mechanism is used to extend, and the mechanism solves the problem that the number of layers of the existing ladder frame 1 is limited, please refer to Figures 1-5And combined with example one, further get, telescopic mechanism 6 includes turntable 601, turntable 601 is rotatably connected in the lower side inside the ladder stand 1, the telescopic cylinder 602 is slidably connected in the inside of turntable 601, the secondary cylinder 603 is slidably connected in the inside of telescopic cylinder 602, the tertiary cylinder 604 is slidably connected in the inside of secondary cylinder 603, the fourth cylinder 605 is slidably connected in the inside of tertiary cylinder 604, the threaded table 606 is fixedly connected in the inside of secondary cylinder 603, tertiary cylinder 604 and fourth cylinder 605, motor 607 is fixedly connected in the inside of telescopic cylinder 602, stud 608 is fixedly connected in the output end of motor 607, stud 608 is threadedly connected with the threaded table 606 in the inside of secondary cylinder 603, secondary threaded sleeve 609 is slidably connected on the outer wall of stud 608, secondary threaded sleeve 609 is rotatably connected on the outer wall of threaded table 606 in the inside of secondary cylinder 603, secondary threaded sleeve 609 is threadedly connected with the threaded table 606 in the inside of tertiary cylinder 604, tertiary threaded sleeve 610 is slidably connected on the outer wall of secondary threaded sleeve 609, tertiary threaded sleeve 610 is rotatably connected on the outer wall of threaded table 606 in the inside of tertiary cylinder 604, tertiary threaded sleeve 610 is threadedly connected with the threaded table 606 in the inside of fourth cylinder 605, the limiting strip 611 is fixedly connected in the inside of secondary cylinder 603, tertiary cylinder 604, secondary threaded sleeve 609 and tertiary threaded sleeve 610, the limiting groove 612 is formed in the inside of secondary cylinder 603, tertiary cylinder 604, fourth cylinder 605, stud 608 and secondary threaded sleeve 609.

[0031] Further, the adjacent limiting strip 611 is slidably connected with the limiting groove 612.

[0032] Further, the fourth cylinder 605 is fixedly connected with the ring structure at the end, and the ring structure is rotatably connected with the connecting seat 504 in the inside.

[0033] In actual operation, when the device is used, the user pushes the device to the position where the board ladder is needed, and then the user starts the motor 607, and the motor 607 is output through the stud 608 to drive the secondary threaded cylinder and the tertiary threaded cylinder to rotate in turn, and the stud 608, the secondary threaded cylinder and the tertiary threaded cylinder are threadedly connected with the threaded table 606 in the secondary cylinder 603, the tertiary cylinder 604 and the fourth cylinder 605 in turn, so that the fourth cylinder 605 can be quickly stretched and the base 507 can be extended, so as to quickly build a stable support forming a triangle with the ground.

[0034] It is to be noted that, as used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a combination of two or more components. Additionally, the terms "comprise," "comprises," and "comprising," or any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, unless otherwise indicated herein, the terms "first," "second," "third," etc., are not intended to denote a physical order, quantity, or importance, but rather are used for the purpose of nomenclature.

Claims

1. A retractable ladder for construction, comprising a ladder frame (1), legs (2) fixedly connected to the lower side of the ladder frame (1), rollers (3) rotatably connected inside the legs (2), and a push handle (4) fixedly connected to one side of the ladder frame (1), characterized in that: The ladder frame (1) is provided with an extension mechanism (5) and a telescopic mechanism (6), the extension mechanism (5) is arranged outside the telescopic mechanism (6); The extension mechanism (5) comprises a limiting frame (501) fixedly connected to the two sides of the ladder frame (1), a sleeve plate (502) fixedly connected to the inner side of the limiting frame (501), a connecting rod (503) rotatably connected to the left end of the sleeve plate (502), a connecting seat (504) and an extension seat (505) rotatably connected to the lower side of the connecting rod (503), a stabilizing rod (506) rotatably connected between the right end of the connecting seat (504) and the middle part of the sleeve plate (502), a plurality of connecting rods (503) and extension seats (505), the connecting rod (503) is rotatably connected to the left, middle and right ends of the extension seat (505) from top to bottom, a base (507) rotatably connected to the lower end of the connecting rod (503), a bottom rod (508) rotatably connected to the middle side of the base (507), and the upper end of the bottom rod (508) is rotatably connected to the left end of the extension seat (505).

2. A stretchable sheet ladder of the building type according to claim 1, characterized in that: The connecting seat is provided with a notch at one end.

3. A stretchable sheet ladder of the building type according to claim 1, characterized in that: The connecting seat, the extension seat and the base are all provided with notches at the left, middle and right sides.

4. A stretchable sheet ladder of the building type according to claim 1, characterized in that: The connecting rod is longer than the stabilizing rod and the bottom rod.

5. A stretchable sheet ladder of the building type according to claim 1, characterized in that: Said telescopic mechanism (6) includes a rotating platform (601), which is rotationally connected to the inside lower side of the ladder stand (1), a telescopic cylinder (602) is slidingly connected inside the rotating platform (601), a secondary cylinder (603) is slidingly connected inside the telescopic cylinder (602), a tertiary cylinder (604) is slidingly connected inside the secondary cylinder (603), a quaternary cylinder (605) is slidingly connected inside the tertiary cylinder (604), a threaded platform (606) is fixedly connected inside the secondary cylinder (603), the tertiary cylinder (604) and the quaternary cylinder (605), a motor (607) is fixedly connected inside the telescopic cylinder (602), a stud (608) is fixedly connected to the output end of the motor (607), the stud (608) is threadedly connected with the threaded platform (606) inside the secondary cylinder (603), a secondary threaded sleeve (609) is slidingly connected to the outer wall of the stud (608), the secondary threaded sleeve (609) is rotationally connected to the outer wall of the threaded platform (606) inside the secondary cylinder (603), the secondary threaded sleeve (609) is threadedly connected with the threaded platform (606) inside the tertiary cylinder (604), a tertiary threaded sleeve (610) is slidingly connected to the outer wall of the secondary threaded sleeve (609), the tertiary threaded sleeve (610) is rotationally connected to the outer wall of the threaded platform (606) inside the tertiary cylinder (604), the tertiary threaded sleeve (610) is threadedly connected with the threaded platform (606) inside the quaternary cylinder (605), a limiting strip (611) is fixedly connected inside the secondary cylinder (603), the tertiary cylinder (604), the secondary threaded sleeve (609) and the tertiary threaded sleeve (610), and a limiting groove (612) is formed inside the secondary cylinder (603), the tertiary cylinder (604), the quaternary cylinder (605), the stud (608) and the secondary threaded sleeve (609).

6. A stretchable sheet ladder of the building type according to claim 5, characterized in that: Said adjacent limiting strips (611) and limiting grooves (612) are slidingly connected.

7. A stretchable sheet ladder of the building type according to claim 5, characterized in that: The quaternary cylinder (605) is fixedly connected with a hanging ring structure, and the hanging ring structure is rotationally connected inside the connecting seat (504).

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