A telescopic folding step ladder and trolley

Abstract

The utility model discloses a telescopic folding climbing ladder and tool of small trolley, related to building construction technical field, including bottom frame and work panel, bottom frame one end is equipped with walking wheel, and the both ends of bottom frame are hinged with the both ends of work panel respectively and are equipped with first telescopic ladder and second telescopic ladder, and the upper end of first telescopic ladder has the U -shaped piece of hinged work panel and supports work panel, and the inner side of lower end of first telescopic ladder is equipped with the cross brace of blocking work panel, the utility model discloses effectively unifies ladder and handcart, realizes double function, and effectively improves construction efficiency, through rotating folding, work panel can be used as climbing support, and also can be used as handcart storage rack, adopts telescopic ladder, and is favorable to building high -altitude construction operation, and expands the applicability.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a tool that can be extended and folded as a ladder and trolley. Background Technology

[0002] Current construction work at height typically utilizes folding or telescopic ladders. During construction, the ladder is placed on level ground or against a wall, and the extension joint is extended before workers can ascend. Material transportation in existing construction projects typically uses small handcarts, saving time and effort and replacing manual handling. However, current technology requires two types of tools (ladders and handcarts) for both work at height and material transportation, which is inconvenient. Utility Model Content

[0003] The purpose of this utility model is to solve the problems in the prior art mentioned above and provide a tool that can be extended and folded as a ladder and a trolley. It changes the original method by combining the ladder and the trolley into one, reducing the number of tools required during construction and enabling dual functions with only one tool.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A retractable and foldable ladder that also functions as a trolley includes a base frame and a work panel. One end of the base frame is equipped with a traveling wheel, and the two ends of the base frame are respectively hinged to the two ends of the work panel. The upper end of the first retractable ladder has a U-shaped piece that is hinged to and supports the work panel, and the lower inner side of the first retractable ladder is provided with a cross brace to block the work panel.

[0006] Furthermore, both ends of the working panel are connected to fastening bolts by threads, and the upper end of the second telescopic ladder is provided with a perforated plate for the fastening bolts at one end of the working panel to pass through, while the fastening bolts at the other end of the working panel pass through the U-shaped piece.

[0007] Furthermore, a support rod is provided at the end of the bottom frame away from the walking wheel.

[0008] Furthermore, the bottom frame end is provided with a braking structure for braking the traveling wheels.

[0009] Furthermore, the braking structure includes a gear that rotates with the traveling wheel, and a brake bolt is threadedly connected to the bottom frame. The brake bolt extends into the teeth of the gear to brake the gear and the traveling wheel.

[0010] Furthermore, the first telescopic ladder and the work panel have a connected state and a separated state; when the first telescopic ladder and the second telescopic ladder are rotated and folded at the bottom frame, the cross brace is attached to one side of the end of the work panel.

[0011] Furthermore, both the first and second telescopic ladders are hinged with reinforcing rods at their lower parts, and the bottom frame is provided with a rack that abuts against the lower end of the reinforcing rod.

[0012] Furthermore, a handhold is provided at the center of the bottom frame away from the walking wheel.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This utility model effectively combines a ladder and a handcart into one, achieving dual functions and effectively improving construction efficiency; through rotation and folding, the work panel can serve as both a support for climbing and a shelf for the handcart; the use of a telescopic ladder facilitates construction work at high places in buildings, such as the interior ceiling, thus expanding its applicability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the present invention as a ladder for climbing.

[0016] Figure 2 This is a schematic diagram of the working panel connection of this utility model.

[0017] Figure 3 This is a schematic diagram of the braking structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the first telescopic ladder of this utility model in its folded and flipped working panel states.

[0019] Figure 5 This is a schematic diagram of the folded state of this utility model.

[0020] Figure 6 This is a schematic diagram of the present invention as a trolley.

[0021] In the diagram: 1. Base frame; 2. Traveling wheels; 3. Support rod; 4. Work panel; 5. First telescopic ladder; 6. Second telescopic ladder; 7. Reinforcing rod; 8. Rack; 9. Fastening bolt; 10. Gear; 11. Brake bolt; 12. Cross brace; 13. Bracket; 14. Hand handle; 501. U-shaped part; 601. Perforated plate. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0023] This utility model was tested on the H001 (river canal) section of the Yangtze River-Huaihe River Water Diversion Project (Anhui section), during the decoration and renovation of the Xifeihe North Station pumping station management area. A specific embodiment of the telescopic folding ladder / trolley tool provided by this utility model is as follows:

[0024] Please see Figure 1-6 A telescopic and foldable ladder that also functions as a trolley includes a base frame 1 and a work panel 4. One end of the base frame 1 is equipped with two wheels 2, which are located on opposite sides of the same end of the base frame 1. The two wheels 2 are connected by the same axle, which passes through the end of the base frame 1 and is rotatably connected to the base frame 1.

[0025] This tool functions as both a ladder and a trolley. To ensure stability when used as a ladder, in this embodiment, the bottom frame 1 is provided with a braking structure at its end to brake the traveling wheels 2. The braking structure is provided in two sets to brake the traveling wheels 2 on both sides respectively.

[0026] The braking structure includes a gear 10 that rotates with the traveling wheel 2. The gear 10 rotates coaxially with the traveling wheel 2, and the teeth of the gear 10 are not involute teeth, but straight plate teeth. The base frame 1 is connected to a brake bolt 11 by threads. The brake bolt 11 is a Torx bolt that can be turned by hand. Rotating the brake bolt 11 causes it to extend between the teeth of the gear 10, braking both the gear 10 and the traveling wheel 2, thus providing stable support for the base frame 1 when used as a ladder. Rotating the brake bolt 11 can also disengage it from between the teeth of the gear 10 without affecting the rotation of the traveling wheel 2, facilitating the movement of the trolley.

[0027] Two support rods 3 are provided at the end of the base frame 1 furthest from the wheels 2. When this tool is used as a climbing ladder, the support rods 3 and the wheels 2 support both ends of the base frame 1, keeping the base frame 1 level and thus stabilizing the bottom of the climbing ladder. When this tool is used as a trolley, the support rods 3 can also serve as handles. A handhold 14 is provided in the middle of the end of the base frame 1 furthest from the wheels 2, which is convenient for holding when pushing the trolley.

[0028] The working panel 4 has a flat structure. The inner sides of both ends of the bottom frame 1 are hinged to the two ends of the working panel 4, respectively, with the first telescopic ladder 5 and the second telescopic ladder 6. The telescopic ladder is existing technology and will not be described in detail in this embodiment. For example, the telescopic ladder disclosed in patent CN200985738Y and the half of the articulated multi-section telescopic ladder disclosed in patent CN205936360U are examples. This embodiment does not involve the improvement of the internal structure of the telescopic ladder, but only the application of the telescopic ladder and the improvement of the connection structure at both ends.

[0029] The upper end of the first telescopic ladder 5 has a U-shaped component 501 that is hinged to and supports the working panel 4. The U-shaped component 501 is a U-shaped plate structure. Both ends of the working panel 4 are connected to fastening bolts 9 through internal threaded holes. The upper end of the second telescopic ladder 6 is provided with a perforated plate 601 through which the fastening bolts 9 at one end of the working panel 4 pass. The fastening bolts 9 at the other end of the working panel 4 pass through the U-shaped component 501.

[0030] There are four fastening bolts 9, arranged in pairs, located on both sides of the end of the work panel 4. The fastening bolts 9 on the same side of the work panel 4 mate with either the first telescopic ladder 5 or the second telescopic ladder 6. There are two perforated plates 601 and two U-shaped pieces 501.

[0031] The U-shaped component 501 supports the fastening bolt 9 and thus supports the work panel 4, and also forms a hinge with the work panel 4. The U-shaped component 501 allows the first telescopic ladder 5 and the work panel 4 to be separated, thereby allowing the first telescopic ladder 5 and the second telescopic ladder 6 to be rotated and folded.

[0032] When the fastening bolt 9 is not tightened, the working panel 4 is hinged to the first telescopic ladder 5 and the second telescopic ladder 6. When the fastening bolt 9 is tightened, the U-shaped piece 501 and the perforated plate 601 can be pressed against the side of the working panel 4 to form a braking and limiting connection between the working panel 4 and the telescopic ladder, thereby improving the stability of the working panel 4.

[0033] The lower inner side of the first telescopic ladder 5 is provided with a cross brace 12 to block the working panel 4. The first telescopic ladder 5 and the working panel 4 have a connected state and a separated state; when the first telescopic ladder 5 and the second telescopic ladder 6 are rotated and folded at the bottom frame 1, the cross brace 12 is attached to one side of the end of the working panel 4, restricting the flipping of the working panel 4. At this time, the working panel 4 is perpendicular to the second telescopic ladder 6 and is used to carry building materials, and is used as a trolley.

[0034] Simply tightening the bolts 9 results in poor stability as a climbing ladder, and the operation is cumbersome. Therefore, both the first telescopic ladder 5 and the second telescopic ladder 6 are hinged with reinforcing rods 7 at their lower parts. There are four reinforcing rods 7. The bottom frame 1 has a rack 8 on its lower side that abuts against the lower end of the reinforcing rod 7. The lower end of the reinforcing rod 7 is set as a pointed tip. The tooth cross-section of the rack 8 is a right-angled triangle, which can restrict the lower end of the reinforcing rod 7. Thus, the reinforcing rods 7 provide auxiliary support for the lower inner side of the telescopic ladder. When this tool is used as a climbing ladder, it can improve the stability of the first telescopic ladder 5 and the second telescopic ladder 6.

[0035] A bracket 13 supporting the rack 8 is provided on the lower side of the base frame 1. The bracket 13 is a horizontal bar connected to the side frames of the base frame 1 at both ends. The horizontal bar is connected to the rack 8 to achieve stable support for the rack 8. The rack 8 abuts against the lower end of the reinforcing rod 7 at different positions, which can achieve support for the telescopic ladder at different angles and adapt to the changes in the telescopic ladder's extension angle.

[0036] like Figure 1 The image shows the tool when used as a ladder. When it needs to be folded into a trolley, first rotate the working panel 4. The working panel 4 rotates around the perforated plate 601 at the upper end of the second telescopic ladder 6 and separates from the U-shaped piece 501 at the upper end of the first telescopic ladder 5.

[0037] Rotate and retract the reinforcing rod 7 at the bottom of the first telescopic ladder 5, then fold the first telescopic ladder 5 inside the base frame 1, as shown. Figure 4 As shown;

[0038] Then retract the reinforcing bar 7 at the bottom of the second telescopic ladder 6, and then fold the second telescopic ladder 6 inside the bottom frame 1, as shown. Figure 5 As shown; the end of the working panel 4 contacts the cross brace 12, and the cross brace 12 restricts the working panel 4 from rotating in one direction;

[0039] Lift up end 3 of the support rod of the bottom frame 1, as follows: Figure 6 As shown, by placing building materials on the upper side of the work panel 4 and the front side of the folded second telescopic ladder 6, and pushing the tool, the building materials can be transferred.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A retractable and foldable ladder / trolley tool, comprising a base frame (1) and a work panel (4); characterized in that, The bottom frame (1) is equipped with a walking wheel (2) at one end. The bottom frame (1) is hinged to the working panel (4) at both ends with a first telescopic ladder (5) and a second telescopic ladder (6). The upper end of the first telescopic ladder (5) has a U-shaped part (501) that is hinged to the working panel (4) and supports the working panel (4). The lower inner side of the first telescopic ladder (5) is provided with a cross brace (12) that blocks the working panel (4).

2. The tool that can be extended and folded as a ladder and trolley according to claim 1, characterized in that, Both ends of the working panel (4) are connected by threaded fastening bolts (9). The upper end of the second telescopic ladder (6) is provided with a perforated plate (601) through which the fastening bolts (9) at one end of the working panel (4) pass, and the fastening bolts (9) at the other end of the working panel (4) pass through the U-shaped piece (501).

3. The tool that can be extended and folded as a ladder and trolley according to claim 1, characterized in that, The bottom frame (1) has a support rod (3) at the end away from the walking wheel (2).

4. The tool that can be extended and folded as a ladder and trolley according to claim 1, characterized in that, The bottom frame (1) is provided with a braking structure at its end to brake the traveling wheel (2).

5. The tool that can be extended and folded as a ladder and trolley according to claim 4, characterized in that, The braking structure includes a gear (10) that rotates with the traveling wheel (2), and a brake bolt (11) is threadedly connected to the bottom frame (1). The brake bolt (11) extends into the inter-tooth space of the gear (10) to brake the gear (10) and the traveling wheel (2).

6. The tool that can be extended and folded as a ladder and trolley according to claim 1, characterized in that, The first telescopic ladder (5) and the work panel (4) are in a connected state and a separated state; when the first telescopic ladder (5) and the second telescopic ladder (6) are rotated and folded at the bottom frame (1), the cross brace (12) is attached to one side of the end of the work panel (4).

7. The tool that can be extended and folded as a ladder and trolley according to claim 1, characterized in that, The first telescopic ladder (5) and the second telescopic ladder (6) are both hinged with reinforcing rods (7) at the bottom, and the bottom frame (1) is provided with a rack (8) that abuts against the lower end of the reinforcing rod (7).

8. The tool that can be extended and folded as a ladder and trolley according to claim 1, characterized in that, The bottom frame (1) has a handhold (14) at the middle of one end away from the walking wheel (2).

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