CN110080674B - Folding ladder - Google Patents
Folding ladder Download PDFInfo
- Publication number
- CN110080674B CN110080674B CN201910516414.2A CN201910516414A CN110080674B CN 110080674 B CN110080674 B CN 110080674B CN 201910516414 A CN201910516414 A CN 201910516414A CN 110080674 B CN110080674 B CN 110080674B
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- folding ladder
- upright
- lock wheel
- upright post
- locking mechanism
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- 230000007246 mechanism Effects 0.000 claims abstract description 49
- 230000009471 action Effects 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 230000009194 climbing Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
- E06C1/383—Foldable ladders in which the longitudinal members are brought together on folding
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/08—Special construction of longitudinal members, or rungs or other treads
- E06C7/082—Connections between rungs or treads and longitudinal members
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
The application discloses a folding ladder, which comprises: the device comprises a first upright post, a second upright post, a first pedal and a first locking mechanism, wherein the first upright post is parallel to the second upright post, and two ends of the first pedal are respectively and rotatably connected with the first upright post and the second upright post; wherein the first locking mechanism is capable of preventing rotation of the first step relative to the first and second posts when the folding ladder has been unfolded; and the first locking mechanism can also allow the first pedal to rotate relative to the first upright and the second upright when the folding ladder is folded, so that the first upright and the second upright are close to each other. The folding ladder can be folded in the use process, so that the occupied volume of the folding ladder is reduced, and the folding ladder is convenient to transport and store.
Description
Technical Field
The application relates to the field of ladders, in particular to a folding ladder.
Background
Ladders are a type of climbing tool that is widely used in various industries to assist operators in climbing from low to high. However, if the size of the ladder is too large, it is difficult to move and inconvenient to store.
Disclosure of Invention
One of the embodiments of the application provides a folding ladder, which comprises a first upright post, a second upright post, a first pedal and a first locking mechanism, wherein the first upright post is parallel to the second upright post, and two ends of the first pedal are respectively connected with the first upright post and the second upright post in a rotating way; wherein the first locking mechanism is capable of preventing rotation of the first step relative to the first and second posts when the folding ladder has been unfolded; and the first locking mechanism can also allow the first pedal to rotate relative to the first upright and the second upright when the folding ladder is folded, so that the first upright and the second upright are close to each other.
In some embodiments, the first locking mechanism comprises a diagonal strut, a first end of which is rotatably connected to the second upright and a second end of which is lockable or disconnectable from the first upright.
In some embodiments, the first locking mechanism further comprises a pull rod and a lock wheel, the upper end of the pull rod is arranged on the first upright, the lower end of the pull rod is connected with the lock wheel, the lock wheel is connected with the first upright through a rotating shaft, and a first connecting part is arranged on the lock wheel; the second end of the inclined strut is provided with a second connecting part which can be matched with the first connecting part, wherein when the pull rod is pulled upwards to drive the lock wheel to rotate around the rotating shaft, the first connecting part and the second connecting part can be converted into a phase-separated state from a phase-locked state.
In some embodiments, the first connection portion is a hook-like structure and the second connection portion is a rod-like structure, the hook-like structure being capable of hooking onto the rod-like structure such that the lock wheel is locked with the diagonal strut.
In some embodiments, the first pedal is provided with a guide groove extending along the length direction of the first pedal, and the second connecting part of the inclined strut is slidably connected in the guide groove.
In some embodiments, a first elastic reset member is disposed at the rotating shaft, and after the pull rod is pulled upwards to drive the lock wheel to rotate, the lock wheel can automatically rotate and reset under the action of the elastic force of the first elastic reset member.
In some embodiments, a guiding inclined plane is arranged on one side of the hook-shaped structure, which faces the rod-shaped structure, wherein when the second connecting part slides in the guiding groove towards the first connecting part, the rod-shaped structure can slide along the guiding inclined plane to push the lock wheel to rotate until the rod-shaped structure is clamped into the hook-shaped structure, and at the moment, the lock wheel rotates and resets under the action of the elastic force of the first elastic resetting member, so that the lock wheel is locked with the inclined strut.
In some embodiments, the folding ladder further comprises a plurality of second pedals disposed above the first pedal, two ends of the second pedal are respectively rotatably connected with the first upright post and the second upright post, and the plurality of second pedals are disposed between the first upright post and the second upright post at intervals.
In some embodiments, the first upright and the second upright are provided with accommodating cavities which are open towards each other, and the accommodating cavities can accommodate the first pedal and the second pedal after the first upright and the second upright are close together.
In some embodiments, the lock wheel is provided with an arc-shaped groove, the circle center of the arc-shaped groove coincides with the rotating shaft, and the lower end of the pull rod is slidably connected in the arc-shaped groove.
In some embodiments, the first locking mechanism further comprises a chute arranged on the first upright and extending vertically, and a sliding sheet arranged in the chute, wherein the sliding sheet is connected with the upper end of the pull rod, and the sliding sheet can slide upwards or downwards along the chute.
In some embodiments, a second elastic reset member is disposed between the pull rod and the chute, and when the slide sheet is slid upward, the slide sheet can automatically slide downward to reset under the action of the elastic force of the second elastic reset member after the pull rod drives the lock wheel to rotate.
In some embodiments, the first upright and the second upright each comprise an upper column and a lower column, the lower end of the upper column is rotatably connected with the upper end of the lower column, and a second locking mechanism is arranged at the rotary connection part of the upper column and the lower column and can prevent the upper column and the lower column from rotating relatively when locking.
In some embodiments, the second locking mechanism comprises a first mounting plate, two second mounting plates and a pressing member, wherein the first mounting plate is arranged on one of the upper column and the lower column, the second mounting plate is arranged on the other of the upper column and the lower column, and the two second mounting plates are clamped outside the first mounting plate; the pressing member may penetrate the first and second mounting plates, and may cause the second mounting plate to press the first mounting plate.
In some embodiments, the folding ladder further comprises support bases provided at bottoms of the first and second uprights, respectively.
In some embodiments, the folding ladder further comprises a handle provided on the first upright and/or the second upright.
Drawings
The application will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. The embodiments are not limiting, in which like numerals represent like structures, wherein:
fig. 1 is a schematic perspective view illustrating an unfolded state of a folding ladder according to some embodiments of the present application;
fig. 2 is a schematic perspective view illustrating a folded state of a folding ladder according to some embodiments of the application;
FIG. 3 is a schematic view of a first locking mechanism of a folding ladder according to some embodiments of the application;
fig. 4 is a schematic view of a first locking mechanism of a folding ladder according to some embodiments of the application;
FIG. 5 is a detailed structural schematic view of a first locking mechanism of a folding ladder according to some embodiments of the application;
Fig. 6 is a detailed structural schematic view of a first locking mechanism of a folding ladder according to some embodiments of the application;
fig. 7 is a detailed structural schematic view of a first locking mechanism of a folding ladder according to some embodiments of the application;
Fig. 8 is a detailed structural schematic view of a second locking mechanism of the folding ladder according to some embodiments of the application;
FIG. 9 is a schematic view of a folding ladder shown in accordance with some embodiments of the application with an angle of 180 between the upper and lower columns;
Fig. 10 is a schematic view of a folding ladder according to some embodiments of the application with an angle of 0 between the upper and lower columns.
In the figure, 1 is a first upright, 2 is a second upright, and 3 is a first pedal; 4 is a first locking mechanism, 5 is a second pedal, 6 is a second locking mechanism, 7 is a supporting base, 8 is a handle, 11 is an upper column, 12 is a lower column, 31 is a guide groove, 41 is an oblique strut, 42 is a pull rod, 43 is a lock wheel, 44 is a rotating shaft, 45 is a first elastic reset member, 46 is a sliding groove, 47 is a sliding sheet, 48 is a second elastic reset member, 61 is a first mounting plate, 62 is a second mounting plate, 63 is a pressing member, 411 is a first end, 412 is a second end, 413 is a second connecting portion, 431 is a first connecting portion, 432 is an arc groove, and 4311 is a guide inclined plane.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
On the contrary, the application is intended to cover any alternatives, modifications, equivalents, and variations as may be included within the spirit and scope of the application as defined by the appended claims. Further, in the following detailed description of the present application, certain specific details are set forth in order to provide a better understanding of the present application. The present application will be fully understood by those skilled in the art without the details described herein.
Embodiments of the present application relate to a folding ladder that can be unfolded when in use and folded when needed for transportation and storage. The folding ladder can be suitable for various occasions, for example, the folding ladder can be used for taking and placing high objects in daily life, can also be used for construction engineering operation, can also be used for scenes such as fire rescue and the like, and is not limited in this way.
Fig. 1 is a schematic perspective view showing an unfolded state of a folding ladder according to some embodiments of the present application, and fig. 2 is a schematic perspective view showing a folded state of a folding ladder according to some embodiments of the present application, and a detailed description will be given of the folding ladder according to the embodiments of the present application with reference to fig. 1-2. It is noted that the following examples are only for explaining the present application and are not to be construed as limiting the present application.
In the embodiment of the application, as shown in fig. 1-2, the folding ladder may comprise a first upright 1, a second upright 2, a first pedal 3 and a first locking mechanism 4, wherein the first upright 1 is parallel to the second upright 2, and two ends of the first pedal 3 are respectively connected with the first upright 1 and the second upright 2 in a rotating way. Wherein the first locking mechanism 4 is capable of preventing the first step 3 from rotating relative to the first and second uprights 1,2 when the folding ladder has been unfolded (in the state shown in fig. 1); and the first locking mechanism 4 is also capable of allowing the first step 3 to rotate relative to the first and second uprights 1,2 when the folding ladder is folded (when changing from the state shown in fig. 1 to the state shown in fig. 2) so that the first and second uprights 1,2 come together. It should be noted that, a person skilled in the art may specifically set the number of the first locking mechanisms 4 according to actual needs, and the number may be one or more. In addition, the setting height of the first pedal 3 relative to the first upright 1 and the second upright 2 can be specifically set by those skilled in the art according to actual needs. In addition, the first step 3 is preferably perpendicular to the first upright 1 when the folding ladder is in the unfolded state, so as to facilitate climbing by the operator. The material of the folding ladder can be selected from steel, wood or aluminum alloy, and the like, and preferably the material of the folding ladder is aluminum alloy.
In some embodiments, the first locking mechanism 4 comprises a diagonal strut 41, a first end 411 of the diagonal strut 41 being rotatably connected to the second upright 2, and a second end 412 of the diagonal strut being capable of being locked to or unlocked from the first upright 1. When the folding ladder of the application is unfolded, the second end 412 of the inclined strut 41 is locked with the first upright 1, so that the first pedal 3 is prevented from rotating relative to the first upright 1 and the second upright 2; when the folding ladder is folded from the unfolded state, the second end 412 of the diagonal strut 41 is separated from the first upright 1, so that the first pedal 3 can rotate relative to the first upright 1 and the second upright 2, and the diagonal strut 41 can also rotate around the rotation connection point of the diagonal strut with the second upright 2, and the first upright 1 and the second upright 2 can be closed to enable the folding ladder to be folded. It should be noted that, in the present embodiment, the diagonal brace 41 refers to a configuration in which the diagonal brace 41 is in an inclined state (not parallel to the first step 3) when the folding ladder is in an unfolded state, so that the diagonal brace 41, the first step 3 and the second upright 2 may form a triangle or triangle-like structure, thereby improving the structural stability of the folding ladder in the unfolded state. The second end 412 of the diagonal strut 41 may be locked to the first upright 1 in a number of ways, such as by a snap fit or by a threaded connection.
Fig. 3 is a schematic structural view of a first locking mechanism of a folding ladder according to some embodiments of the application, fig. 4 is a schematic structural view of a first locking mechanism of a folding ladder according to some embodiments of the application, fig. 5 is a schematic structural view of a first locking mechanism of a folding ladder according to some embodiments of the application, fig. 6 is a schematic structural view of a first locking mechanism of a folding ladder according to some embodiments of the application, and fig. 7 is a schematic structural view of a first locking mechanism of a folding ladder according to some embodiments of the application. In the embodiment shown in fig. 3-7, the first locking mechanism 4 further comprises a pull rod 42 and a locking wheel 43, wherein the upper end of the pull rod 42 is arranged on the first upright 1, the lower end of the pull rod is connected with the locking wheel 43, the locking wheel 43 is connected with the first upright 1 through a rotating shaft 44, and a first connecting part 431 is arranged on the locking wheel 43. It should be noted that, the lock wheel 43 may be directly connected to the first upright 1 or may be indirectly connected to the first upright 1, for example, the lock wheel 43 may be connected to the first pedal 3 first and then connected to the first upright 1 through the first pedal 3. The second end 412 of the diagonal strut 41 is provided with a second connection portion 413 capable of cooperating with the first connection portion 431. When the pull rod 42 is pulled upward to rotate the lock wheel 43 around the rotating shaft 44, the first connection portion 431 and the second connection portion 413 can be changed from the locked state to the separated state. In the present embodiment, the pull rod 42 is pulled to drive the lock wheel 43 to move, so that the unlocking and locking of the first locking mechanism 4 are realized, and the locking control structure is simple and reliable. In some alternative embodiments, the lock wheel 43 may also be connected to the first upright 1 by a knob, which when rotated, is able to rotate the lock wheel 43 about the rotation axis 44.
Specifically, as shown in fig. 7, the first connection portion 431 is a hook structure, and the second connection portion 413 is a rod structure, and the hook structure can be hooked to the rod structure to lock the lock gear 43 with the diagonal strut 41. Through the cooperation of the hook-shaped structure and the rod-shaped structure, the lock wheel 43 and the inclined strut 41 can be connected together more stably, and are not easy to separate, so that the safety performance of the folding ladder in use is improved. In some alternative embodiments, the first connection portion 431 and the second connection portion 413 may also be configured as other fastening structures (such as a fastening hook and a fastening slot, or a fastening pin and a fastening hole, etc.).
In some embodiments, the first pedal 3 is provided with a guide groove 31 extending along the length direction thereof, and the second connecting portion 413 of the inclined strut 41 is slidably connected in the guide groove 31. With this arrangement, in the folding step of the folding ladder of the present application, after the second connection portion 413 of the diagonal brace 41 is detached from the first connection portion 431 of the lock wheel 43, the second end 412 of the diagonal brace 41 slides along the guide groove 31 to gradually approach the second upright 2 while the diagonal brace 41 rotates about its rotational connection point with the second upright 2. The above structure defines the position of the second end 412 of the diagonal strut 41, and the first pedal 3 pulls the diagonal strut 41 to rotate, thereby defining the rotation direction of the diagonal strut 41 during folding. In addition, the guide groove 31 of the first step 3 can guide the second end 412 of the diagonal strut 41 to move to a locking position with the locking wheel 43 by pulling the distance between the first and second uprights 1 and 2 when the folding ladder needs to be unfolded. In some alternative embodiments, the position of the second end 412 of the diagonal strut 41 may not be limited when the first connection portion 431 is separated from the second connection portion 413, that is, the second end 412 of the diagonal strut 41 may be configured to be directly suspended from other structures of the folding ladder when the first connection portion 431 is separated from the second connection portion 413. The person skilled in the art can choose the appropriate way to set up according to the actual use requirements.
In some embodiments, the rotating shaft 44 is provided with a first elastic reset member 45, when the pull rod 42 is pulled upwards to drive the lock wheel 43 to rotate, the lock wheel 43 is separated from the inclined strut 41, and after the pull rod 42 is released, the lock wheel 43 can automatically rotate and reset under the action of the elastic force of the first elastic reset member 45. Specifically, the first elastic restoring member 45 may be selected as a torsion spring. Further, a guiding inclined surface 4311 is provided on a side of the hook structure facing the rod structure, wherein when the second connecting portion 413 slides in the guiding groove toward the first connecting portion 431, the rod structure can slide along the guiding inclined surface 4311 to push the locking wheel 43 to rotate until the rod structure is clamped in the hook structure, and at this time, the locking wheel 43 is rotationally reset under the elastic force of the first elastic reset member 45, so that the locking wheel 43 is locked with the oblique strut 41. By means of the arrangement, the operator only needs to pull the first upright 1 and the second upright 2 apart during the unfolding of the folding ladder, and the second end 412 of the diagonal strut 41 can be locked by the automatic locking wheel 43, so that the folding ladder of the application can be unfolded very simply and conveniently in a folded state, and particularly in emergency situations (for example, when the folding ladder of the application is used for fire rescue).
In some embodiments, the folding ladder of the present application further includes a plurality of second pedals 5 disposed above the first pedal 3, two ends of the second pedals 5 are rotatably connected to the first upright 1 and the second upright 2, respectively, and the plurality of second pedals 5 are disposed between the first upright 1 and the second upright 2 at intervals. The second step 5 may be of a general plate-like or rod-like structure, and a guide groove may not be provided as in the first step 3, so that the processing difficulty and the manufacturing cost of the folding ladder of the present application can be reduced as a whole. Meanwhile, the second step 5 is disposed above the first step 3 mainly for convenience in the folding and unfolding process of the folding ladder, and thus, a person skilled in the art may also dispose the position of the first step 3 to other positions, for example, above some of the second steps 5, according to actual needs.
In some embodiments, in order to further reduce the volume occupied by the folded folding ladder, the first upright 1 and the second upright 2 are provided with accommodating cavities which are open towards each other, and the accommodating cavities can accommodate the first pedal 3 and the second pedal 5 after the first upright 1 and the second upright 2 are close to each other.
In some embodiments, the lock wheel 43 is provided with an arc-shaped groove 432, the center of the arc-shaped groove 432 coincides with the rotating shaft 44, and the lower end of the pull rod 42 is slidably connected in the arc-shaped groove 432. In the process of rotating the lock wheel 43, the lower end of the pull rod 42 can slide in the arc-shaped groove 432, and through the arrangement, the pull rod 42 can more smoothly control the rotation of the lock wheel 43, and the lock between the lower end of the pull rod 42 and the lock wheel 43 is not easy to be blocked, so that the folding ladder can be unfolded and folded more stably and smoothly. In addition, during the unfolding of the folding ladder, the rod-shaped structure can slide along the guide inclined plane 4311 to push the lock wheel 43 to rotate, and the arrangement of the arc-shaped groove 432 can prevent the rotation of the lock wheel 43 from affecting the pull rod.
In some embodiments, the first locking mechanism 4 further includes a vertically extending chute 46 provided on the first upright 1 and a slide 47 provided in the chute 46, the slide 47 being connected to the upper end of the pull rod 42, the slide 47 being capable of sliding up or down along the chute 46. The position of the upper end of the pull rod 42 is limited by the sliding groove 46 and the sliding sheet 47, so that an operator can conveniently pull the pull rod 42 upwards. In some alternative embodiments, the upper end of the pull rod 42 may also be connected to the first upright 1 by a roller or the like, so as to pull the pull rod 42 upward by the rotation of the roller.
Preferably, a second elastic restoring member 48 is disposed between the pull rod 42 and the chute 46, and when the slide sheet 47 is slid upward to rotate the lock wheel 43 by the pull rod 42, the slide sheet 47 can automatically slide downward for restoring under the elastic force of the second elastic restoring member 48. In this embodiment, the second elastic restoring member 48 may include a spring and a spacer fixed to the pull rod 42, the lower end of the spring being abutted against the spacer, and the upper end thereof being abutted against the bottom end of the chute 46. When the slide 47 is slid upward, the tie rod 42 moves upward with it and the washer moves upward compressing the spring. When the lock wheel 43 is unlocked from the inclined strut 41, the pull rod 42 is pushed downwards under the action of the elasticity of the spring, so that the slide sheet 47 is pulled to slide downwards for resetting. In addition, under the combined action of the first elastic reset member 45 and the second elastic reset member 48, the lock wheel 43 and the slide sheet 47 can realize synchronous reset after the lock wheel 43 and the inclined strut 41 are unlocked, so that the first locking mechanism 4 is not easy to be blocked, and can always work stably.
In some embodiments, the first upright 1 and the second upright 2 each comprise an upper column 11 and a lower column 12, the lower end of the upper column 11 is rotatably connected with the upper end of the lower column 12, a second locking mechanism 6 is arranged at the rotation connection position of the upper column 11 and the lower column 12, and the second locking mechanism 6 can prevent the upper column 11 and the lower column 12 from rotating relatively when locked. The second locking mechanism 6 can adjust the angle of the included angle between the upper cylinder 11 and the lower cylinder 12 when the folding ladder is unfolded and used, for example, the second locking mechanism 6 can be locked when the included angle between the upper cylinder 11 and the lower cylinder 12 is 180 degrees, so that the folding ladder can be unfolded to form a vertical ladder (shown in fig. 9). The angle of the included angle between the upper cylinder 11 and the lower cylinder 12 may also be adjusted to other angles, such as 0 °, 30 °, 35 °, 45 ° degrees, etc. Referring to fig. 10, fig. 10 is a schematic view illustrating a folding ladder according to some embodiments of the application when an angle between an upper column and a lower column is 0 °. Through the arrangement, a user of the folding ladder can specifically adjust the height of the folding ladder according to the specific situation of a using place and the height required to climb, so that the universal adaptability of the folding ladder in the using process is improved. In addition, in the folding process of the folding ladder of the present application, the upper column 11 and the lower column 12 of the folding ladder are first closed, so that the angle between the upper column 11 and the lower column 12 is 0 °, that is, the folding ladder is in the state shown in fig. 10, and then the first upright 1 and the second upright 2 are forced to be closed, so that the folding ladder is in the state shown in fig. 2. In some embodiments, the upper column 11 and the lower column 12 may be provided with a first locking mechanism, so that the folding ladder is more stable when unfolded. In the embodiment shown in fig. 9-10, 4 pedals (including a first pedal and a second pedal) are included on the upper cylinder 11 and the lower cylinder 12, respectively. In alternative embodiments, the number of steps on the folding ladder may be other numbers. For example, the upper cylinder 11 and the lower cylinder 12 may include 3 steps, 5 steps, 6 steps, or the like, respectively.
Fig. 8 is a detailed structural schematic view of a second locking mechanism of the folding ladder according to some embodiments of the application, and as shown in fig. 8, the second locking mechanism 6 includes a first mounting plate 61, two pieces of second mounting plates 62 and a pressing member 63, the first mounting plate 61 is provided on one of the upper and lower columns, and the second mounting plate 62 is provided on the other of the upper and lower columns, and the two pieces of second mounting plates 62 are clamped outside the first mounting plate 61. The pressing member 63 can penetrate the first mounting plate 61 and the second mounting plate 62, and can cause the second mounting plate 62 to press the first mounting plate 61. The pressing member 63 may be a bolt, an adjusting knob, or the like, and the present application is not limited thereto.
In some embodiments, the folding ladder of the application further comprises a support base 7 provided at the bottom of the first upright 1 and the second upright 2, respectively. The supporting base 7 can increase the contact area between the first upright 1 and the second upright 2 and the ground, and effectively prevent the first upright 1 and the second upright 2 from slipping on the ground, thereby improving the safety performance of the folding ladder in the use process.
In some embodiments, the folding ladder of the present application further comprises a handle 8, where the handle 8 may be disposed on the first upright 1, the second upright 2, or both the first upright 1 and the second upright 2. By arranging the lifting handle 8, the folding ladder can be more convenient to transport. Preferably, handles 8 are arranged on the first upright 1 and the second upright 2, and when the folding ladder is in a folded state, that is, when the first upright 1 and the second upright 2 are close to each other, the handles 8 on the first upright 1 and the second upright 2 are located on the same horizontal height.
The folding ladder disclosed by the application can bring beneficial effects including but not limited to: (1) When the folding ladder needs to be transported or stored, the folding ladder can be folded to reduce the occupied volume, so that the folding ladder is convenient to transport and store; (2) The height of the folding ladder can be adjusted according to application places and use requirements, so that the folding ladder can be suitable for different scenes; (3) The folding ladder is stable in structure and high in safety performance when being in an unfolding state; (4) The folding ladder is simple and convenient to fold and unfold. It should be noted that, the advantages that may be generated by different embodiments may be different, and in different embodiments, the advantages that may be generated may be any one or a combination of several of the above, or any other possible advantages that may be obtained.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.
Claims (12)
1. The folding ladder is characterized by comprising a first upright post, a second upright post, a first pedal and a first locking mechanism, wherein the first upright post is parallel to the second upright post, and two ends of the first pedal are respectively connected with the first upright post and the second upright post in a rotating way;
wherein the first locking mechanism is capable of preventing rotation of the first step relative to the first and second posts when the folding ladder has been unfolded; the first locking mechanism can also allow the first pedal to rotate relative to the first upright post and the second upright post when the folding ladder is folded, so that the first upright post and the second upright post are close;
The first locking mechanism comprises an inclined strut, a first end of the inclined strut is rotatably connected with the second upright, and a second end of the inclined strut can be locked with or separated from the first upright;
The first locking mechanism further comprises a pull rod and a lock wheel, the upper end of the pull rod is arranged on the first upright post, the lower end of the pull rod is connected with the lock wheel, the lock wheel is connected with the first upright post through a rotating shaft, and a first connecting part is arranged on the lock wheel; the second end of the inclined strut is provided with a second connecting part which can be matched with the first connecting part, wherein when the pull rod is pulled upwards to drive the lock wheel to rotate around the rotating shaft, the first connecting part and the second connecting part can be converted into a phase-separated state from a phase-locked state;
The lock wheel is provided with an arc-shaped groove, the circle center of the arc-shaped groove coincides with the rotating shaft, and the lower end of the pull rod is slidably connected in the arc-shaped groove;
The first locking mechanism further comprises a sliding groove which is arranged on the first upright post and extends vertically and a sliding sheet which is arranged in the sliding groove, the sliding sheet is connected with the upper end of the pull rod, and the sliding sheet can slide upwards or downwards along the sliding groove.
2. A folding ladder according to claim 1, characterized in that the first connection part is a hook-like structure and the second connection part is a rod-like structure, the hook-like structure being able to be hooked onto the rod-like structure such that the lock wheel is locked with the diagonal strut.
3. A folding ladder according to claim 2, characterized in that the first tread is provided with a guide slot extending in the length direction thereof, the second connecting portion of the diagonal strut being slidably connected in the guide slot.
4. A folding ladder according to claim 3, wherein a first elastic reset member is arranged at the rotating shaft, and the lock wheel can automatically rotate and reset under the action of the elastic force of the first elastic reset member after the pull rod is pulled upwards to drive the lock wheel to rotate.
5. A folding ladder according to claim 4, wherein a guiding inclined surface is provided on a side of the hook-shaped structure facing the rod-shaped structure, wherein when the second connecting portion slides in the guiding groove toward the first connecting portion, the rod-shaped structure can slide along the guiding inclined surface to push the lock wheel to rotate until the rod-shaped structure is clamped into the hook-shaped structure, and at this time, the lock wheel rotates and returns under the action of the elastic force of the first elastic return member, so that the lock wheel is locked with the inclined strut.
6. A folding ladder according to claim 3, further comprising a plurality of second pedals disposed above said first pedal, wherein two ends of said second pedals are rotatably connected to said first and second posts, respectively, and wherein a plurality of said second pedals are disposed between said first and second posts at intervals.
7. A folding ladder according to claim 6, characterized in that the first and second uprights are each provided with a receiving cavity open towards each other, said receiving cavities being able to receive the first and second pedals after the first and second uprights are brought together.
8. A folding ladder according to claim 1, wherein a second elastic reset member is arranged between the pull rod and the sliding chute, and when the sliding sheet is slid upwards so that the pull rod drives the lock wheel to rotate, the sliding sheet can automatically slide downwards to reset under the action of the elastic force of the second elastic reset member.
9. A folding ladder according to any one of claims 1-8, characterized in that the first and second uprights each comprise an upper and a lower cylinder, the lower end of the upper cylinder being in rotational connection with the upper end of the lower cylinder, the rotational connection of the upper and lower cylinders being provided with a second locking mechanism, which second locking mechanism is capable of preventing relative rotation of the upper and lower cylinders when locked.
10. A folding ladder according to claim 9, characterized in that said second locking mechanism comprises a first mounting plate, two pieces of second mounting plates and a pressing member, said first mounting plate being provided on one of said upper and lower columns, and said second mounting plate being provided on the other of said upper and lower columns, both pieces of said second mounting plates being clamped outside said first mounting plate; the pressing member may penetrate the first and second mounting plates, and may cause the second mounting plate to press the first mounting plate.
11. A folding ladder according to any one of claims 1-8, further comprising support bases provided at the bottom of the first and second uprights, respectively.
12. A folding ladder according to any one of claims 1-8, characterised in that it further comprises a handle provided on the first upright and/or the second upright.
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| CN201910516414.2A CN110080674B (en) | 2019-06-14 | 2019-06-14 | Folding ladder |
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| CN201910516414.2A CN110080674B (en) | 2019-06-14 | 2019-06-14 | Folding ladder |
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| CN110080674B true CN110080674B (en) | 2024-05-07 |
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| CN110080674A (en) | 2019-08-02 |
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