CN218493534U - Platform ladder - Google Patents

Abstract

The utility model discloses a platform ladder, which comprises a supporting component and a protection component arranged on the supporting component; the protective assembly comprises a protective guard and a limiting rod, the fixed end of the limiting rod is used for being connected with the protective guard, and the extending end of the limiting rod is used for being matched with relevant equipment so as to prevent the platform ladder from toppling.

Description

Platform ladder

Technical Field

This description relates to a platform ladder for overhaul the operation, for example, overhaul subway shield door, belong to maintenance tool technical field.

Background

When carrying out the maintenance operation, for example overhaul subway shield door, because the average height of waiting to overhaul the position relative ordinary people seems higher, can use the platform ladder usually to make things convenient for the operation personnel to stand and carry out the operation on the platform ladder. The platform ladder can take place to empty, if subway shield door is in the state of opening, then has the danger that the operation personnel fell into the subway track region.

Therefore, there is a need for a platform ladder to prevent tipping during operation.

SUMMERY OF THE UTILITY MODEL

The embodiment of the specification provides a platform ladder, which comprises a support assembly and a protection assembly arranged on the support assembly; the protective assembly comprises a protective guard and a limiting rod, the fixed end of the limiting rod is used for being connected with the protective guard, and the extending end of the limiting rod is used for being matched with relevant equipment so as to prevent the platform ladder from toppling.

In some embodiments, the support assembly includes a plurality of support legs, and an anti-rollover structure disposed on at least a portion of the support legs.

In some embodiments, the anti-rollover structure includes a support disposed on a lower portion of the support leg for abutting a support surface to prevent the platform ladder from tipping.

In some embodiments, the support legs include two first support legs and two second support legs, the two first support legs being inclined outwardly, the two second support legs being provided with the anti-rollover structure.

In some embodiments, the stop bar is movable relative to the guard rail, and when the stop bar is in the first state, the extending end of the stop bar is higher than the guard rail, and when the stop bar is in the second state, the extending end of the stop bar is lower than or level with the guard rail.

In some embodiments, the limiting rod moves in a rotating manner relative to the guard rail.

In some embodiments, the stop bar moves relative to the guard rail in a sliding manner.

In some embodiments, the limiting rod is arranged on the side edge of the protective guard and on the same side as the anti-rollover structure.

In some embodiments, the device further comprises a support platform, a heightening pedal and a stepping cross ladder; the supporting platform is arranged at the top of the supporting component, the heightening pedal is detachably arranged on the supporting platform, and the stepping and conveying horizontal ladder is arranged on one side of the supporting component.

In some embodiments, the height of the guard rail with respect to the support member is 0.5m to 1.3m, and the height of the extended end of the stopper rod with respect to the guard rail is 0.5m to 1.5m.

In some embodiments, the limiting rods are arranged on the protective guards and can be matched with related equipment, such as an area to be overhauled above a subway shield door, so that the platform ladder can be effectively prevented from toppling over, and the construction safety of operators is improved.

Drawings

Fig. 1 is an exemplary block diagram of a platform ladder 100 of some embodiments of the present description.

Figure 2 is a side view of a platform ladder 100 of some embodiments of the present description.

The reference signs are: 100. a platform ladder; 1. a support assembly; 11. a first support leg; 12. a rollover prevention structure;

13. a second support leg; 2. a guard assembly; 21. protecting the fence; 22. a limiting rod; 221. a fixed block; 3. a support table;

4. a heightening pedal; 5. pedaling and conveying the horizontal ladder; 6. a roller assembly; 7. a height adjustment assembly.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present specification, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only examples or embodiments of the present description, and that for a person skilled in the art, the present description can also be applied to other similar scenarios on the basis of these drawings without inventive effort. It is to be understood that these exemplary embodiments are given solely to enable those skilled in the relevant art to better understand and implement the present description, and are not intended to limit the scope of the present description in any way. Unless otherwise apparent from the context, or otherwise indicated, like reference numbers in the figures refer to the same structure or operation.

Fig. 1 and 2 are exemplary block diagrams of a platform ladder 100 according to some embodiments of the present disclosure.

As shown in fig. 1 and 2, in some embodiments, the platform ladder 100 may include a support assembly 1, and a shielding assembly 2 disposed on the support assembly 1.

The support assembly 1 is used to provide a position for an operator during work, and the operator can perform work in a standing or sitting posture on the support assembly 1.

The protective assembly 2 is used for providing safety protection for the operator, so that the risk of the operator during operation is reduced or even eliminated.

In some embodiments, the guard assembly 2 may include a guard rail 21 and a restraint bar 22.

The guard rail 21 serves to prevent an operator from accidentally falling off the support assembly 1.

The stop bar 22 is used to prevent the platform ladder from accidentally toppling over during operation. In some embodiments, the two ends of the limiting rod 22 are a fixed end and an extended end, respectively, wherein the fixed end of the limiting rod 22 is used for connecting with the guard rail 21, and the extended end of the limiting rod 22 is used for adapting with the related equipment to prevent the platform ladder 100 from toppling over. The related equipment refers to equipment which can be in contact with the extending end of the limiting rod 22 in a working environment, for example, a wall body above a subway platform screen door during maintenance work of the subway platform screen door. In the maintenance operation process, the extension end of the limiting rod 22 is in contact with the wall body above the subway shield door, so that when the subway shield door is opened, the subway track area which falls due to the fact that the limiting rod 22 is blocked by the wall body above the subway shield door can be effectively prevented from being accidentally toppled over by the platform ladder 100.

In some embodiments, the support assembly 1 may include a plurality of support legs, and an anti-rollover structure 12 disposed on at least some of the support legs. In some embodiments, there may be four support legs, and may include two first support legs 11 and two second support legs 13 as shown in fig. 1 and 2. In some embodiments, there may be three support legs, and may include two first support legs 11 and one second support leg 13, forming a triangular support frame. In some embodiments, there may be five support legs, including three first support legs 11 and two second support legs 13, wherein the three first support legs 11 form a triangle therebetween, such as an isosceles triangle. The number of the supporting legs can be six or more than six, and the supporting legs can be flexibly adjusted according to requirements and are not exhaustive.

In some embodiments, to improve the stability of the support assembly 1, two adjacent support legs, such as the first support leg 11 of figures 1 and 2, may be inclined outwardly and two other support legs, such as the second support leg 12 of figures 1 and 2, may be provided with an anti-rollover structure 12.

In some embodiments, the lower end of the support leg of the support assembly 1 is coated with an elastic material to prevent the support leg from impacting the glass protective door and causing damage to the protective door.

The anti-rollover structure 12 serves to further enhance the stability of the support assembly 1.

In some embodiments, the anti-rollover structure 12 may include supports disposed on the lower portion of the support legs, such as the supports shown in fig. 1 and 2, for abutting a support surface (e.g., the ground) to prevent the platform ladder 100 from tipping.

In some embodiments, the anti-rollover structure 12 may be removably connected to the lower portion of the support legs. In some embodiments, the rollover prevention structure 12 may be connected to the lower portion of the support legs in a fixed connection.

In some embodiments, the bottom of the rollover prevention structure 12 may be provided with an elastic layer, such as a rubber layer, to cushion the contact, which may provide good compliance when the support surface is not flat.

In some embodiments, the anti-rollover structure 12 may be rotatably disposed at the lower portion of the support leg by a rotating shaft, and the rotation angle of the anti-rollover structure 12 is limited within a range, for example, 0 ° to 10 ° by a limiting component (not shown in fig. 1 and 2) at the lower portion of the support leg, i.e., the anti-rollover structure 12 may be rotated upward by 10 ° from the horizontal position. In some embodiments, the spacing member may be disposed above the rollover prevention structure 12. In some embodiments, the spacing member may be disposed below the rollover prevention structure 12.

In some embodiments, an elastic return member, such as a return spring, a rubber layer, or a combination thereof, may be disposed between the position limiting member and the rollover prevention structure 12 to enable the rollover prevention structure 12 to automatically return when the platform ladder 100 is not in use.

In some embodiments, the stopper rod 22 is capable of moving relative to the guard rail 21, and when the stopper rod 22 is in the first state, the extending end of the stopper rod 22 may be higher than the guard rail 21, and when the stopper rod 22 is in the second state, the extending end of the stopper rod 22 may be lower than the guard rail 21 or flush with the guard rail 21. In the foregoing embodiments, the stop rod 22 can be located at different positions in different states, so that the overall size of the platform ladder 100 can be effectively reduced, the occupied space is small, and the storage is convenient.

The first state refers to the arresting bar 22 being in the use state. The second state refers to the gag lever post 22 being in a stowed position.

In some embodiments, the restraint bar 22 may be in the form of two or more telescoping bars. In some embodiments, the stop 22 may be an integrally formed rod. In some embodiments, the stop rod 22 may not be limited to a rod shape, but may be a plate shape, such as a plate shape having a width of 1cm to 5cm and a thickness of 0.5cm to 1.5 cm. In some embodiments, the length of the stop rod 22 can be made into various specifications, and can be flexibly selected according to actual application scenarios.

In some embodiments, the extended end of the gag lever post 22 may be provided with a fixing block 221. The fixing block 221 is used for realizing a larger contact area between the limiting rod 22 and the related equipment, increasing the sliding friction force of the limiting rod 22 on the contact surface of the related equipment, and playing a role in preventing slipping. In some embodiments, the fixing block 221 may be a flexible member, such as a rubber block, which may effectively increase the sliding friction of the limiting rod 22 on the contact surface of the related device.

In some embodiments, the fixing block 221 may have any one of a circular shape, a square shape, a polygonal shape, and the like. In some embodiments, the contact area of the fixing block 221 with the related device may be 10 square centimeters to 100 square centimeters. For example, the fixed block may be a square block with a side length of 8cm, and the contact area with the relevant equipment is 64 square centimeters.

Due to the fixing block 221, the limiting performance of the limiting rod 22 can be enhanced by the foregoing embodiments, and the possibility of the platform ladder 100 falling is reduced.

The movement mode of the limiting rod 22 relative to the guard rail 21 can be various, and one of the modes can be selected according to actual requirements.

In some embodiments, the movement of the limiting rod 22 relative to the guard rail 21 may be a rotation. In some embodiments, the structure for realizing the rotation of the limiting rod 22 relative to the guard rail 21 may include a rotating shaft, through which a fixed end of the limiting rod 22 may be rotatably connected with the guard rail 21, and a limiting member for limiting the rotation of the limiting rod 22.

In some embodiments, the limiting member may be a U-shaped member, and both ends of the U-shaped member may be threaded ends, and the threaded ends may be fixed by nuts after being inserted into the corresponding mounting through holes of the guard rail 21. When the stopper rod 22 needs to be rotated, the U-shaped member is detached, and after the stopper rod 22 is rotated to the position in the first state or the position in the second state, the U-shaped member is attached to the guard rail 21 and fixed.

In some embodiments, the limiting member may include a U-shaped member and a clip strip, wherein holes are formed at two ends of the U-shaped member, and the U-shaped member is limited by inserting the clip strip into the holes at two ends of the U-shaped member after the two ends of the U-shaped member are inserted into the corresponding mounting through holes of the guard rail 21. The holes at both ends of the U-shaped member are located adjacent to the guard rail 21 to prevent the stopper bar 22 from being loosened. In some embodiments, the card strip may be an arcuate strip. In some embodiments, the clip strip may be a U-shaped strip.

In some embodiments, the movement of the limiting rod 22 relative to the guard rail 21 is sliding. In some embodiments, the structure for achieving the rotation of the limiting rod 22 relative to the guard rail 21 may include a sliding groove and a limiting member. In some embodiments, the sliding groove may be disposed on the protective guard 21 so that the limiting rod 22 can slide therein, at least two positioning holes are formed on the bottom surface of the sliding groove, and at least one positioning hole is correspondingly formed on the limiting rod 22. After the limiting rod 22 slides to a required height in the sliding chute, the limiting member is inserted into the positioning hole on the bottom surface of the sliding chute and the positioning hole on the limiting rod 22, so as to limit the limiting rod 22 in the height direction.

The number of positioning holes on the bottom surface of the chute and the number of positioning holes on the stopper rod 22 can be flexibly adjusted according to the work scene. For example, two positioning holes are formed in the bottom surface of the sliding chute, and one positioning hole is formed in the limiting rod 22, so that the limiting rod 22 has two selectable height positions in the sliding chute. For another example, three or more positioning holes are equidistantly formed in the bottom surface of the sliding chute, and one positioning hole is correspondingly formed in the limiting rod 2, so that the limiting rod 22 has three or more selectable height positions in the sliding chute. For another example, three or more positioning holes are equidistantly formed in the bottom surface of the sliding chute, and two positioning holes are correspondingly formed in the limiting rod 2, so that the limiting rod 22 has two or more selectable height positions in the sliding chute.

In some embodiments, the movement of the limiting rod 22 relative to the guard rail 21 may be telescopic, that is, the limiting rod 22 itself is a telescopic rod component, the fixed end of the limiting rod 22 is fixedly connected with the guard rail 21, and the extending end of the limiting rod 22 may be far away from or close to the guard rail 21 when the limiting rod 22 is telescopic. The limiting rod 22 may be a telescopic rod assembly composed of two or more telescopic rods.

In some embodiments, since the anti-rollover structure 12 and the stop bar 22 both function to prevent the platform ladder 100 from tipping to the same side, the stop bar 22 may be disposed at the side of the guard rail 21 and at the same side as the anti-rollover structure 12. In some embodiments, the anti-rollover structure 12 may be disposed on one side of the platform ladder 100 and the stop bar 22 may be disposed on the side adjacent to the side on which the anti-rollover structure 12 is disposed. In some embodiments, the restraint bar 22 may be sloped toward the side of the rollover prevention structure 12 on a side adjacent to the side of the rollover prevention structure 12.

In some embodiments, the platform ladder 100 may include a support table 3, the support table 3 being disposed on top of the support assembly 1. The support base 3 is used to provide a position for an operator during work. In some embodiments, the support table 3 may be a flat plate. In some embodiments, the support table 3 may be made of an insulating material, such as rubber. In some embodiments, the support table 3 may be in the form of a hot pressed aluminum honeycomb panel having light weight, slip resistant, and corrosion resistant features.

In some embodiments, the support table 3 has a width of 400mm to 600mm and a length of 500mm to 700mm. For example, the support base 3 has a width of 500mm and a length of 600mm. For example, the support base 3 has a width of 400mm and a length of 500mm. For example, the support base 3 has a width of 600mm and a length of 700mm.

In some embodiments, to facilitate work on the platform ladder 100 by workers of different heights, the platform ladder 100 may comprise a height step 4, the height step 4 being detachably arranged on the support bench 3. For example, the operator may place the height increasing step 4 on the support base 3 during work, and after the work is completed, the height increasing step may be detached and fixedly placed on the side surface of the support unit 1 or attached to the side surface of the guard rail 21.

In some embodiments, the step-up pedal 4 may be made of an insulating material, such as rubber. In some embodiments, the step-up foot plate 4 may be in the form of a hot pressed aluminum honeycomb panel having light weight, slip resistant, and corrosion resistant features.

In some embodiments, the support platform 3 may be provided with two height-adjusting plates on two opposite sides, and at least one pair of sliding grooves are correspondingly provided on the opposite sides of the two height-adjusting plates, so that the height-increasing pedals 4 can be pushed and pulled in and out of the sliding grooves parallel to the support surface (e.g., the ground), and the height-adjusting of the height-increasing pedals 4 is realized by placing the height-increasing pedals 4 in the sliding grooves or on the tops of the height-adjusting plates.

In some embodiments, the chute may be closed at one end and open at the other end to limit the height increasing step 4. In some embodiments, the closed end of the chute may be on the same side as the rollover prevention structure 12.

In some embodiments, the platform ladder 100 may include a step ladder 5, and the step ladder 5 may be disposed at one side of the support assembly 1. The cross ladder 5 is convenient for operators to go up and down the supporting platform 3. In some embodiments, the side of the step ladder 5 may be opposite the side of the anti-rollover structure 12. In some embodiments, the side of the step ladder 5 may be adjacent to the side of the anti-rollover structure 12.

In some embodiments, the height of the guard rail 21 relative to the support assembly 1 may be 0.5m to 1.3m to reduce the risk of an operator accidentally dropping the support table 3.

In some embodiments, the height of the extended end of the stopper rod 22 with respect to the guard rail 21 may be 0.5m to 1.5m. The specific length of the limiting rod 22 can be flexibly adjusted according to actual situations, and is within the protection scope of the inventive concept of the present specification as long as the limiting rod can be adapted to relevant equipment.

In some embodiments, the platform ladder 100 may include a roller assembly 6. The roller assemblies 6 may be mounted at the bottom of the support assembly 1 for facilitating movement of the platform ladder 100. In some embodiments, there may be one or two pairs of scroll wheel assemblies 6.

In some embodiments, the platform ladder 100 may include a height adjustment assembly 7. In some embodiments, a height adjustment assembly 7 may be provided between the roller assembly 6 and the bottom of the support assembly 1 for adjusting the height of the support assembly 1 to achieve contact or separation of the support leg and/or the anti-rollover structure 12 from a support surface (e.g., the ground). When the operator stands on the platform ladder, the support legs and/or the anti-rollover structure 12 contact a support surface (e.g., the ground), and the platform ladder 100 cannot be easily moved. When the support legs and/or the anti-rollover structure 12 are separated from the support surface (e.g., the ground) after the worker gets off the platform ladder 100, the worker can easily push the platform ladder 100 to move.

In some embodiments, the height adjustment assembly 7 may be in the form of a return spring. After the operator stands on the platform ladder 100, the return springs are compressed, the length is shortened, the support assembly 1 is lowered, and the support legs and/or the anti-rollover structure 12 contact a support surface (e.g., the ground). After the operator gets off the platform ladder 100, the length of the return spring is restored, and the support assembly 1 is driven to ascend, and the support legs and/or the anti-rollover structure 12 are separated from the support surface (e.g., the ground).

In some embodiments, the height adjustment assembly 7 may be in the form of a planar four bar linkage. The planar four-bar linkage may include a first link, a second link, and a third link. Wherein: the first connecting rod is rotatably connected with the bottom of the supporting component 1, the first end of the first connecting rod is connected with the first roller component of the roller component 6, and the second end of the first connecting rod extends to form a height-adjusting handle; the first end of the second connecting rod is connected with the second roller component of the roller component 6, and the second section of the second connecting rod is rotatably connected with the bottom of the supporting component 1. The bottom of the first connecting rod, the bottom of the second connecting rod, the bottom of the third connecting rod and the bottom of the supporting component 1 jointly form a plane four-bar linkage mechanism, and an operator rotates the heightening handle along the rotating shafts at the bottom of the first connecting rod and the bottom of the supporting component 1 so as to drive the first roller component and the second roller component to synchronously lift.

In some embodiments, there is at least one pair of first roller assemblies, and each of the first roller assemblies may be coaxial. In some embodiments, there is at least one pair of second roller assemblies, and each of the second roller assemblies may be coaxial.

In some embodiments, the axes of rotation of the first and second roller assemblies are parallel to the side on which the anti-rollover structure 12 is located. In some embodiments, to facilitate the pushing and pulling of the platform ladder by the worker, the second end of the first link may extend out of the side of the rollover prevention structure 12.

In this specification, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and mean, for example, that "connected" may be fixedly connected, detachably connected, or integral with; can be directly connected or indirectly connected through an intermediate medium; communication between the interior of two elements may be possible, as well as the fact that two elements have an interactive relationship. Unless otherwise specifically defined, the specific meanings of the above terms in the present specification can be understood by those of ordinary skill in the art as appropriate.

Also, the description uses specific words to describe embodiments of the description. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the specification is included. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the specification may be combined as appropriate.

Similarly, it should be noted that in the preceding description of embodiments of the present specification, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to imply that more features are required than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.

Finally, it should be understood that the embodiments described herein are merely illustrative of the principles of the embodiments described herein. Other variations are also possible within the scope of the present description. Thus, by way of example, and not limitation, alternative configurations of the embodiments of the present specification can be seen as consistent with the teachings of the present specification. Accordingly, the embodiments of the present description are not limited to only those embodiments explicitly described and depicted herein.

Claims (10)

1. A platform ladder is characterized by comprising a support component and a protection component arranged on the support component; the protective assembly comprises a protective guard and a limiting rod, the fixed end of the limiting rod is used for being connected with the protective guard, and the extending end of the limiting rod is used for being matched with relevant equipment so as to prevent the platform ladder from toppling.

2. The platform ladder of claim 1, wherein the support assembly includes a plurality of support legs, and an anti-rollover structure disposed on at least a portion of the support legs.

3. The platform ladder of claim 2, wherein the anti-rollover structure includes a support disposed at a lower portion of the support leg, the support configured to abut a support surface to prevent the platform ladder from tipping.

4. A platform ladder according to claim 3, characterised in that the support legs comprise two first support legs and two second support legs, the two first support legs being inclined outwardly and the two second support legs being provided with the anti-rollover structure.

5. The landing ladder of claim 1, wherein the restraint bar is movable relative to the guard rail, the extension end of the restraint bar being higher than the guard rail when the restraint bar is in the first state, and the extension end of the restraint bar being lower than or flush with the guard rail when the restraint bar is in the second state.

6. The platform ladder of claim 5, wherein the stop bar is movable in a rotational manner relative to the guard rail.

7. The platform ladder of claim 5, wherein the stop bar is movable in a sliding manner relative to the guard rail.

8. The platform ladder of claim 2, wherein the stop bar is disposed at a side of the guard rail and at a same side of the anti-rollover structure.

9. The platform ladder of claim 1, further comprising a support platform, a step-up tread, and a step-up cross ladder; the supporting platform is arranged at the top of the supporting component, the heightening pedal is detachably arranged on the supporting platform, and the stepping and conveying horizontal ladder is arranged on one side of the supporting component.

10. The landing ladder of claim 1, wherein the height of the guard rail relative to the support assembly is 0.5m-1.3m, and the height of the extended end of the stopper rod relative to the guard rail is 0.5m-1.5m.

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