A ladder

Abstract

The utility model provides a ladder, two parallelly arranged main ladder beams, multiple steps connected between the two main ladder beams, two auxiliary ladder beams corresponding to the main ladder beam, multiple guide plates and multiple fasteners corresponding to the guide plates, both ends of the first side edge of each step are rotatably connected to the two main ladder beams, both ends of the second side edge are rotatably connected to the two auxiliary ladder beams, the multiple guide plates are arranged in pairs and are all provided with arc-shaped guide grooves, each fastener passes through the guide groove and the auxiliary ladder beam, the multiple fasteners have locking state and movable state, under the movable state, can move along the guide groove, make the auxiliary ladder beam move relative to the main ladder beam, simultaneously drive the rotation of the step and the guardrail, thereby adjusting the step and the guardrail, while adjusting the climbing height and the gradient, the overall state of the ladder can be quickly and accurately adjusted. In addition, multiple ladders can be connected with each other, the demand of climbing height, factory batch production and on-site non-standard use is met.

Description

Technical Field

[0001] This utility model relates to the field of high-altitude work equipment technology, and in particular to a ladder. Background Technology

[0002] In the sand and gravel aggregate production line industry, production lines typically require customization based on specific projects, especially steel inclined ladders used by workers for climbing, whose height must be determined according to the actual site conditions. Existing steel inclined ladders are generally fabricated on-site, with ladder beams cut to fit the required climbing height, and the appropriate number of climbing steps and side railings welded in place. This creates numerous problems, particularly since existing steel inclined ladders are custom-made based on non-standard steel structures and specific climbing heights. This approach not only results in a wide variety of types but also fails to meet the need for fine-tuning of height and inclination on-site based on the connection details. Consequently, actual production can only proceed with on-site fabrication of steel inclined ladders, preventing factory production. This leads to lower production and on-site assembly efficiency, inferior overall performance of the finished product compared to factory-made models, and increased production costs and timelines. Therefore, it is necessary to provide a more innovative, adjustable steel inclined ladder. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a ladder that can adjust the slope and height of the ladder, and is easy to assemble and manufacture.

[0004] One embodiment of this utility model provides a ladder, including two main ladder beams arranged side by side and a plurality of treads connected between the two main ladder beams. Each tread has a first side and a second side arranged opposite to each other, and the two ends of the first side are rotatably connected to the two main ladder beams respectively. The ladder also includes two secondary ladder beams corresponding to the two main ladder beams, a plurality of guide plates, and a plurality of fasteners corresponding to the plurality of guide plates. The two ends of the second side of each tread are rotatably connected to the two secondary ladder beams respectively. The plurality of guide plates are arranged in pairs, and each pair of guide plates is fixedly disposed on the two main ladder beams. The components are arranged symmetrically, with an arc-shaped guide groove on each guide plate. Each fastener passes through the guide groove of its corresponding guide plate and the secondary ladder beam corresponding to the main ladder beam connected to the corresponding guide plate, thereby connecting the two secondary ladder beams to the guide plates on which the two main ladder beams are located. Multiple fasteners have a locked state and a movable state. In the locked state, the fasteners fix the secondary ladder beams relative to the guide plates, thus fixing the treads relative to the main ladder beams and the secondary ladder beams. In the movable state, the fasteners can slide along the guide grooves, thereby moving the secondary ladder beams relative to the main ladder beams to adjust the angle of the treads relative to the main ladder beams and the secondary ladder beams.

[0005] Furthermore, the ladder also includes multiple tension seats, which are respectively disposed between each pair of guide plates, and the ends of the fasteners are detachably fitted into the tension seats. Furthermore, the tensioning seat includes a connecting rod and an actuating plate, with the connecting rod connected between each pair of guide plates and the actuating plate fixed in the middle of the connecting rod. Furthermore, the ladder also includes at least two guardrails, each guardrail including a guardrail crossbar and two guardrail posts, the two guardrail posts being pivotally mounted at both ends of the guardrail crossbar, and each guardrail post being simultaneously connected to a main ladder beam and a secondary ladder beam.

[0006] Furthermore, the guardrail post includes a main post section and a bent post section connected to one end of the main post section, with the bent post section connected to the end of the main post section away from the guardrail crossbar.

[0007] Furthermore, a first hinge hole is provided at one end of the main body of the post near the bending section of the post, and the guardrail post is hinged to the main ladder beam through the first hinge hole.

[0008] Furthermore, a second hinge hole is provided at the end of the bent section of the post that is away from the main body of the post, and the guardrail post is hinged to the secondary ladder beam through the second hinge hole.

[0009] Furthermore, the ladder also includes a mounting bracket for connection to a vehicle or other device, the mounting bracket being fixedly connected between the two main ladder beams.

[0010] Furthermore, the ladder also includes two connecting plates that are respectively connected to both ends of the fixed base, and the other ends of the two connecting plates are welded to the two main ladder beams to connect the fixed base to the main ladder beams.

[0011] Furthermore, the connecting plate is also used to connect multiple ladders to each other.

[0012] This utility model provides a ladder comprising two main ladder beams, multiple treads, two secondary ladder beams, multiple guide plates, a guardrail, and multiple fasteners. When the fasteners are loosened, they can move along the guide grooves of the guide plates, causing the secondary ladder beams to move relative to the main ladder beams. This simultaneously rotates the treads and guardrails, thereby adjusting them to ensure the treads remain parallel to the ground and the guardrails always form a parallelogram with the main ladder beams. This allows for quick and accurate adjustment of the overall state of the ladder while simultaneously adjusting the climbing height and incline. The ladder's connecting plate can also be used to connect multiple ladders, forming a modular system. This not only meets the needs of most climbing heights but also significantly reduces the types of parts required, satisfying the requirements of factory production, mass production, and non-standard on-site applications. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of a ladder provided for a preferred embodiment of the present invention.

[0015] Figure 2 for Figure 1 The provided diagram shows the structural breakdown of the ladder.

[0016] Figure 3 for Figure 1 A diagram showing how to adjust the height of the ladder is provided.

[0017] Figure 4 for Figure 1 The provided diagram shows the modular assembly of the ladder.

[0018] In the diagram: Ladder 1; Main ladder beam 11; Step pin 111; Step 12; Secondary ladder beam 13; Connecting hole 130; Guide plate 14; Guide groove 140; Fixing seat 15; Guardrail 16; Guardrail crossbar 161; Guardrail upright 162; Upright main section 1621; Upright bent section 1622; First hinge hole 1623; Second hinge hole 1624; Tensioner seat 17; Connecting rod 171; Actuating plate 172; Fastener 18; Guardrail fastener 180; Connecting plate 19. Detailed Implementation

[0019] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0020] like Figures 1 to 4As shown, one embodiment of this application provides a ladder 1, including two main ladder beams 11 arranged side by side and a plurality of treads 12 connected between the two main ladder beams 11. Specifically, each of the two main ladder beams 11 has a tread pin 111 on its opposite side, which is used to connect to the treads 12 and corresponds one-to-one with each tread 12. More specifically, each main ladder beam 11 has guardrail fasteners 180 at both ends that are connected to the guardrails 16 of the ladder 1, and one end of each guardrail beam 11 also has a connecting plate 19, which is welded to the ends of the two main ladder beams 11 to connect other components to the ladder 1. Meanwhile, each tread 12 has a first side and a second side, which are arranged opposite to each other. The two ends of the first side are rotatably connected to the two main ladder beams 11 by the tread pins 111.

[0021] The ladder 1 also includes two secondary ladder beams 13 corresponding to the two main ladder beams 11, multiple guide plates 14, and multiple fasteners 18 corresponding to the multiple guide plates 14. Specifically, the two secondary ladder beams 13 are also provided with pedal pins 111 for connecting to the pedals 12 on opposite sides. The two ends of the second side of each pedal 12 are rotatably connected to the two secondary ladder beams 13 through the pedal pins 111. More specifically, the two ends of the secondary ladder beams 13 are also provided with guardrail fasteners 180 for connecting to the guardrails 16 of the ladder 1. A connecting hole 130 is opened at the position of the secondary ladder beam 13 corresponding to the guide plate 14. The fasteners 18 are inserted into the connecting hole 130, which can connect the secondary ladder beams 13 and the guide plates 14. At the same time, the connecting hole 130 can limit the fasteners 18 to prevent the fasteners 18 from rotating with the tensioning seat 17 when the tensioning seat 17 is rotated.

[0022] Multiple guide plates 14 are arranged in pairs, each pair of guide plates 14 is symmetrically arranged, and each pair is fixedly mounted on two main ladder beams 11. Each guide plate 14 has an arc-shaped guide groove 140. Each fastener 18 passes through the guide groove 140 of the corresponding guide plate 14 and the connection hole 130 of the corresponding secondary ladder beam 13, thereby connecting the two secondary ladder beams 13 to the guide plates 14 mounted on the two main ladder beams 11 respectively. Specifically, one secondary ladder beam 13 corresponds to one main ladder beam 11, two guide plates 14, and two fasteners 18. Furthermore, the number of guide plates 14 is preferably four. Multiple guide plates 14 can strengthen the connection between the main ladder beams 11 and the secondary ladder beams 13, ensuring the stability of the ladder 1.

[0023] like Figure 3As shown, multiple fasteners 18 have locked and movable states. In the locked state, the fasteners 18 fix the secondary ladder beam 13 relative to the guide plate 14, thus fixing the step 12 relative to the main ladder beam 11 and the secondary ladder beam 13. In the movable state, the fasteners 18 can slide along the guide groove 140, thereby moving the secondary ladder beam 13 relative to the main ladder beam 11 to adjust the angle of the step 12 relative to the main ladder beam 11 and the secondary ladder beam 13. By switching between the locked and movable states of the fasteners 18, the fasteners 18 can be fixed at any position within the guide groove 140, that is, the step 12 can be adjusted at multiple angles and levels, ensuring that the step 12 can be adjusted to be parallel to the ground at any incline, so that workers can climb reliably and conveniently. Furthermore, by adjusting the tightness of the fasteners 18 and the angle of the step 12, the ladder 1 can also adapt to a wide range of climbing heights and inclines.

[0024] In a further embodiment, the secondary ladder beam 13 can be omitted, and the installation form of each step 12 can be changed to an adjustable installation angle style. That is, the adjustment mechanism of the step 12 can adopt a more convenient automatic adjustment, such as a spring self-return mechanism, a gravity self-leveling mechanism, etc., which can more quickly achieve the function of the step 12 always being parallel to the ground when the ladder 1 is at different installation angles.

[0025] The ladder 1 also includes multiple tension seats 17, which are respectively disposed between each pair of guide plates 14. Fasteners 18 pass through the connecting hole 130 and the guide groove 140 and are inserted into the tension seats 17, and are detachably connected to the tension seats 17. Specifically, each tension seat 17 includes a connecting rod 171 and a lever plate 172. The connecting rod 171 is connected between each pair of guide plates 14, and its two ends are respectively connected to the guide plates 14 by fasteners 18. By rotating the connecting rod 171, the fasteners 18 on the left and right sides of the connecting rod 171 can be loosened or tightened, thereby realizing the loosening and tightening of the pedal 12. More specifically, a sliding groove is provided in the middle of the connecting rod 171, and the actuating plate 172 is embedded in the sliding groove and can slide in the groove, which facilitates the application of external force to drive the connecting rod 171 to rotate; furthermore, the actuating plate 172 can also be used to enhance the locking effect of the tensioning seat 17. When the fastener 18 and the pedal 12 are locked, the actuating plate 172 is pulled down so that its center of gravity is placed downward. The gravitational torque of the actuating plate 172 is directed in the direction of locking the tensioning seat 17, thereby achieving a self-locking effect.

[0026] The ladder 1 also includes at least two guardrails 16, each guardrail 16 including a crossbar 161 and two posts 162; the two posts 162 are rotatably mounted at both ends of the crossbar 161, and each post 162 is simultaneously connected to a main ladder beam 11 and a secondary ladder beam 13, forming a parallelogram structure. Under external force, the intersection angle between the posts 162 and the crossbar 161 changes, but the parallelogram structure is always maintained. Specifically, the posts 162 include a main body section 1621 and a bent section 1622, the bent section 1622 being connected to the end of the main body section 1621 away from the crossbar 161. The main body section 1621 of the post has a first hinge hole 1623 at one end near the bending section 1622 of the post. The guardrail post 162 is hinged to the guardrail fasteners 180 at both ends of the main ladder beam 11 through the first hinge hole 1623. The bending section 1622 of the post has a second hinge hole 1624 at one end away from the main body section 1621 of the post. The guardrail post 162 is hinged to the guardrail fasteners 180 at both ends of the secondary ladder beam 13 through the second hinge hole 1624. Since the guardrail post 162 is hinged to both the main ladder beam 11 and the secondary ladder beam 13, when the fastener 18 loosens, it slides along the guide groove 140. The secondary ladder beam 13 moves relative to the main ladder beam 11, causing the bent section 1622 of the guardrail post 162 to rotate around the second hinge hole 1624 and the guardrail fasteners 180 at both ends of the secondary ladder beam 13. This causes the main body section 1621 of the post to rotate around the first hinge hole 1623 and the guardrail fasteners 180 at both ends of the main ladder beam 11. The intersection angle between the guardrail post 162 and the guardrail crossbar 161 also changes accordingly, ensuring that the guardrail crossbar 161 remains parallel to the main ladder beam 11 and that the height of the guardrail post 162 is at its optimal state. Through this linkage adjustment mechanism, the working state of the ladder can be quickly and accurately adjusted and locked.

[0027] In a further embodiment, the guardrail 16 can adopt a combination of low, medium and high modular design. By increasing the number of modules, compared with the adjustability of the parallelogram structure and the fixing scheme of the fastener 18 mentioned above, the modular design of the guardrail 16 is more stable and does not require adjustment, making the assembly work more convenient.

[0028] The ladder 1 also includes a fixing seat 15, which is used to connect the ladder 1 to a vehicle or other external device. The fixing seat 15 is connected between two main ladder beams 11. Specifically, the fixing seat 15 includes a main body plate and mounting plates connected to both ends of the main body plate. The mounting plates are positioned facing the main ladder beams 11 and have pin holes for connecting to the connecting plate 19, so as to reliably install the fixing seat 15 on the main ladder beams 11. It can also accommodate the adjustment of the ladder's installation angle and the positioning and installation requirements of the upper accessories.

[0029] Furthermore, one end of the connecting plate 19 is welded to the main ladder beam 11, and the other end is connected to the mounting plate of the fixing seat 15, so that the fixing seat 15 is detachably connected between the two connecting plates 19, thereby making the fixing seat 15 detachably connected between the two main ladder beams 11. In a further embodiment, the connecting plate is also used to connect multiple ladders 1 to each other. By connecting two ladders 1 end to end through the connecting plate 19, the modular combination of ladders 1 can double the adaptable climbing height of ladders 1, making it more applicable. Furthermore, if more ladder modules are used for combination, when combining multiple ladders 1, several supports can be added to the lower part of the combination, thereby improving the overall stability and installability of ladders 1.

[0030] like Figure 3 As shown, the specific adjustment process of the ladder 1 is as follows: When it is necessary to change the climbing height of the ladder 1, the ladder 1 as a whole is moved first, and then the steps 12 and the guardrail 16 are adjusted. When adjusting the steps 12 and the guardrail 16, an external force is applied to the actuating plate 172 of the tensioning seat 17. The actuating plate 172 is forced to rotate the connecting rod 171, thereby loosening the fastener 18. After the fastener 18 is loosened, it can slide along the guide groove 140 of the guide plate 14, causing the secondary ladder beam 13 to move relative to the main ladder beam 11, and the steps 12 also rotate around the first side. At the same time, the movement of the secondary ladder beam 13 will also cause the guardrail upright 162 to rotate (that is, the bent section 1622 of the upright rotates around the guardrail fastener 180 at the end of the secondary ladder beam 13, and the main body end 1621 of the upright rotates around the guardrail fastener 180 at the end of the main ladder beam 11), so that the angle between it and the guardrail crossbar 161 also changes accordingly. Therefore, when the angle of the pedal 12 is adjusted to be parallel to the ground, the guardrail crossbar 161 is also adjusted to be parallel to the main ladder beam 11, thus facilitating personnel climbing. After all mechanisms are adjusted, an external force opposite to the loosening process is applied to the actuating plate 172 of the tensioning seat 17. The actuating plate 172, under force, drives the connecting rod 171 to rotate, thereby locking the fastener 18. Tighten until the entire mechanism is stable and the operator walks without shaking. The adjustment process is then complete. Figure 3 The state of ladder 1'. This process can adjust the climbing height of ladder 1 within a certain height range H, so that a single ladder module can cover the climbing height needs within a certain range. Furthermore, this standardized design makes this type of ladder easy to mass-produce in the factory, meeting the needs of rapid and flexible on-site installation, thereby reducing the production and on-site installation cycle, management difficulty, and overall cost.

[0031] In summary, the ladder 1 provided by the above-described embodiments of this utility model includes two main ladder beams 11, multiple treads 12, two secondary ladder beams 13, multiple guide plates 14, guardrails 16, and multiple fasteners 18. When the fasteners 18 are loosened, they can move along the guide grooves 140 of the guide plates 14, causing the secondary ladder beams 13 to move relative to the main ladder beams 11. This simultaneously drives the rotation of the treads 12 and guardrails 16, thereby adjusting the treads 12 and guardrails 16 so that the treads 12 are always parallel to the ground and the guardrails 16 always form a parallelogram with the main ladder beams 11. This allows for quick and accurate adjustment of the overall state of the ladder 1 while simultaneously adjusting the climbing height and incline. This standardized design facilitates mass production of these components, meeting the needs for rapid and flexible installation, reducing production and installation cycles, and decreasing management difficulty and costs. In addition, the ladder 1 also includes a connecting plate 19. The connecting plate 19 is not only used to connect the main ladder beam 11 and the fixed seat 15, but also to connect multiple ladders 1. By connecting multiple ladders 1 to form a module, it can not only meet the needs of most climbing heights, but also greatly reduce the types of parts, and meet the needs of factory production, mass production and on-site non-standard use.

[0032] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A ladder, comprising two main ladder beams arranged side by side and a plurality of steps connected between the two main ladder beams, characterized in that, Each tread has a first side and a second side arranged opposite to each other. The two ends of the first side are rotatably connected to the two main ladder beams. The ladder also includes two secondary ladder beams corresponding to the two main ladder beams, multiple guide plates, and multiple fasteners corresponding to the guide plates. The two ends of the second side of each tread are rotatably connected to the two secondary ladder beams. The multiple guide plates are arranged in pairs, each pair of guide plates being fixedly mounted on the two main ladder beams and arranged symmetrically. Each guide plate has an arc-shaped guide groove. Each fastener passes through the corresponding guide plate. The guide groove of the guide plate and the secondary ladder beam corresponding to the main ladder beam connected to the corresponding guide plate, thereby connecting the two secondary ladder beams to the guide plates on which the two main ladder beams are disposed respectively; the plurality of fasteners have a locked state and a movable state. In the locked state, the fasteners fix the secondary ladder beams relative to the guide plate, thereby fixing the pedals relative to the main ladder beams and the secondary ladder beams; in the movable state, the fasteners can slide along the guide grooves, thereby moving the secondary ladder beams relative to the main ladder beams to adjust the angle of the pedals relative to the main ladder beams and the secondary ladder beams.

2. The ladder as described in claim 1, characterized in that, The ladder also includes a plurality of tension seats, which are respectively disposed between each pair of guide plates, and the ends of the fasteners are detachably fitted into the tension seats.

3. The ladder as described in claim 2, characterized in that, The tensioning seat includes a connecting rod and a toggle plate. The connecting rod is connected between each pair of guide plates, and the toggle plate is fixed in the middle of the connecting rod.

4. The ladder as described in claim 1, characterized in that, The ladder also includes at least two guardrails, each guardrail including a guardrail crossbar and two guardrail posts, the two guardrail posts being pivotally mounted at both ends of the guardrail crossbar, and each guardrail post being simultaneously connected to a main ladder beam and a secondary ladder beam.

5. The ladder as described in claim 4, characterized in that, The guardrail post includes a main post section and a bent post section connected to one end of the main post section. The bent post section is connected to the end of the main post section away from the guardrail crossbar.

6. The ladder as described in claim 5, characterized in that, The main body of the column has a first hinge hole at one end near the bending section of the column, and the guardrail column is hinged to the main ladder beam through the first hinge hole.

7. The ladder as described in claim 6, characterized in that, A second hinge hole is provided at the end of the bent section of the post away from the main body section of the post, and the guardrail post is hinged to the secondary ladder beam through the second hinge hole.

8. The ladder as claimed in claim 1, characterized in that, The ladder also includes a mounting bracket for connection to a vehicle, the mounting bracket being fixedly connected between the two main ladder beams.

9. The ladder as described in claim 8, characterized in that, The ladder also includes two connecting plates that are respectively connected to both ends of the fixed base. The other ends of the two connecting plates are welded to the two main ladder beams to connect the fixed base to the main ladder beams.

10. The ladder as claimed in claim 9, characterized in that, The connecting plate is also used to connect multiple ladders to each other.

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