CN221032376U - Herringbone ladder - Google Patents
Herringbone ladder Download PDFInfo
- Publication number
- CN221032376U CN221032376U CN202322863007.3U CN202322863007U CN221032376U CN 221032376 U CN221032376 U CN 221032376U CN 202322863007 U CN202322863007 U CN 202322863007U CN 221032376 U CN221032376 U CN 221032376U
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- Prior art keywords
- plastic
- platform
- ladder frame
- ladder
- cross rod
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- 238000009434 installation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
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- Ladders (AREA)
Abstract
The utility model relates to a herringbone ladder, which comprises a front ladder frame, a rear ladder frame, a switching lug, pedals and a plastic pedal platform with the pedal area larger than 200 square feet, wherein the front ladder frame and the rear ladder frame are connected through the switching lug, the front ladder frame and the rear ladder frame are mutually unfolded or mutually folded, the pedals are arranged on the front ladder frame at intervals, a front cross rod is arranged above the pedals on the front ladder frame, a rear cross rod is arranged on the rear ladder frame, a clamping opening is arranged on one side of the plastic pedal platform, an opening is formed on the other side of the plastic pedal platform, and a safety hook device with a guide surface is movably arranged on the other side of the plastic pedal platform close to the opening; the double ladder is unfolded, the clamping of the plastic trampling platform is completed, the safety and the reliability are realized, meanwhile, the rear cross rod and the front cross rod support the plastic trampling platform upwards, the use safety of the double ladder is greatly improved, and the cost of the ladder is effectively reduced by adopting the plastic trampling platform.
Description
Technical Field
The utility model relates to a herringbone ladder.
Background
In the prior art, the herringbone ladder is provided with a tread platform, and when a user uses the herringbone ladder, the user can stand on the tread platform.
In the prior art, if the pedal is larger, the flatness is difficult to control, the pedal is required to meet the strength test requirement, the cost is higher, the die structure is complex, the pedal is exported to a ladder in the United states in the prior art, the pedal has a plastic pedal platform with the pedal area larger than 200 square feet, the strength test requirement of the national Standard-Portable Metal ladder safety requirement in the United states is met, the manufacturing cost of the ladder meeting the requirement is higher, and the structure is complex.
The pedal platform is increased in size, so that pedal comfort and safety can be improved, and the herringbone ladder with the plastic pedal platform with the pedal area larger than 200 square feet is safe, reliable, simple to assemble and low in cost.
Disclosure of utility model
The utility model aims to provide a herringbone ladder which is provided with a plastic trampling platform with a trampling area larger than 200 square feet, is safe and reliable, is simple to assemble and is low in cost.
The purpose of the utility model is realized in the following way:
The herringbone ladder comprises a front ladder frame, a rear ladder frame, switching lugs, pedals and a plastic pedal platform with the pedal area larger than 200 square feet, wherein the front ladder frame and the rear ladder frame are connected through the switching lugs, the front ladder frame and the rear ladder frame are mutually unfolded or mutually folded, the pedals are arranged at the front ladder frame at intervals, the front ladder frame is positioned above the pedals and is provided with a front cross rod, the rear ladder frame is provided with a rear cross rod, one side of the plastic pedal platform is provided with a clamping opening, the other side of the plastic pedal platform is provided with an opening, and meanwhile, a safety hook device with a guide surface is movably arranged on the other side of the plastic pedal platform close to the opening;
The front cross rod is inserted into the clamping opening so that the plastic treading platform is movably connected with the front ladder frame, and the plastic treading platform rotates by taking the front cross rod as a rotation center;
When the front ladder frame and the rear ladder frame are mutually unfolded, the rear cross rod enters the opening and upwards supports the plastic trampling platform, and meanwhile, the safety hook device rotates to hook the rear cross rod tightly.
The front cross rod is inserted into the clamping opening of the plastic tread platform, the plastic tread platform and the front ladder frame are connected, the installation is simple and quick, after the herringbone ladder is unfolded, a user presses the plastic tread platform, the rear cross rod is caused to touch the guide surface of the safety hook device and is gradually hooked by the safety hook device, when the rear cross rod is separated from the guide surface and is hooked by the safety hook device, the herringbone ladder is unfolded, the clamping of the plastic tread platform is completed, the safety and the reliability are achieved, meanwhile, the rear cross rod and the front cross rod upwards support the plastic tread platform, the use safety of the herringbone ladder is greatly improved, and the cost of the ladder is effectively reduced by adopting the plastic tread platform.
The aim of the utility model can be also solved by adopting the following technical measures:
Further, the inner cavity diameter of the clamping opening is larger than the diameter of the front cross rod, and the inlet diameter of the clamping opening is smaller than the diameter of the front cross rod. When the worker installs the plastic and steps on the platform, the user aligns the front cross bar and puts the mouth, then downwards presses the plastic and steps on the platform, make the front cross bar get into the card and put the mouth in, because the card is put a mouthful inner chamber diameter and is greater than the front cross bar diameter, consequently the plastic tramples the platform and can freely rotate around the front cross bar, again, because the card is put the entry diameter of mouth and is less than the front cross bar diameter, the front cross bar can not break away from with the card and put a mouthful, improve the safety in utilization of double ladder greatly, be different from common axle or beat rivet mounting means, this has not only simplified injection mold structure, assembly efficiency has still been improved greatly.
Further, the plastic tread platform is a plastic tread platform meeting the tread strength requirement. The plastic tread platform is repeatedly simulated and calculated by adopting mechanical simulation software, and a plastic tread platform with a better structure is designed through finite element analysis, so that a user is more stable and comfortable when standing.
Further, the plastic tread platform has a size of 388 x 361mm. The size of the plastic tread platform is 388 x 361mm, the plastic tread platform belongs to a large platform, the plastic tread platform is repeatedly simulated and calculated by adopting mechanical simulation software, and the plastic tread platform with a better structure is designed through finite element analysis, so that a user is more stable and comfortable when standing.
Further, the pedal comprises a long connecting piece and a short connecting piece, one side of the pedal is arranged in the front ladder frame in a rotating mode, the other side of the pedal and the middle of the plastic trampling platform are respectively connected with the long connecting piece, one end of the short connecting piece is connected with the long connecting piece, and the other end of the short connecting piece is connected with the rear ladder frame.
Further, the rear ladder frame is provided with an auxiliary wheel near the upper part of the bottom of the rear ladder frame. Through being provided with the auxiliary wheel, after the double ladder is received, the user utilizes the auxiliary wheel to be convenient for remove the double ladder, makes things convenient for the double ladder transport, when guaranteeing ladder safety, and appearance wholeness is felt well, elegant appearance, and does not influence the packing size.
Further, the safety hook device comprises a safety hook with a guide surface and a spring, the safety hook is movably connected with the plastic tread platform, the spring is arranged between the safety hook and the plastic tread platform, and the spring forms a reset mechanism of the safety hook. The user is with expanding each other between preceding ladder frame and the back ladder frame, realizes the double ladder and expands simultaneously that footboard and plastic trample the platform and expand in step under long connection piece and short connection piece effect, then the user tramples the platform with compression moulding glue down, and the back horizontal pole touches the safety hook of taking the guide surface, and the back horizontal pole overcomes the elasticity promotion safety hook of spring gradually, and after the back horizontal pole slides into the safety hook along the guide surface, the spring resets and promotes the safety hook, maintains the state of safety hook locking back horizontal pole, makes the plastic trample the platform firm card and puts at the double ladder, improves the safety in utilization of double ladder.
The beneficial effects of the utility model are as follows:
According to the utility model, the front cross rod is inserted into the clamping opening of the plastic tread platform to complete connection of the plastic tread platform and the front ladder frame, the installation is simple and quick, after the herringbone ladder is unfolded, a user presses the plastic tread platform, the rear cross rod contacts the guide surface of the safety hook device and is gradually hooked by the safety hook device, when the rear cross rod is separated from the guide surface and is hooked by the safety hook device, the herringbone ladder is unfolded, the clamping of the plastic tread platform is completed, the safety and reliability are realized, meanwhile, the rear cross rod and the front cross rod upwards support the plastic tread platform, the use safety of the herringbone ladder is greatly improved, and the cost of the ladder is effectively reduced by adopting the plastic tread platform.
According to the utility model, when a worker installs the plastic tread platform, the front cross rod is aligned with the clamping opening, then the plastic tread platform is pressed downwards, so that the front cross rod enters the clamping opening, the plastic tread platform can freely rotate around the front cross rod due to the fact that the inner cavity diameter of the clamping opening is larger than that of the front cross rod, and furthermore, the front cross rod and the clamping opening cannot be separated due to the fact that the inlet diameter of the clamping opening is smaller than that of the front cross rod, so that the use safety of the herringbone ladder is greatly improved, and the herringbone ladder is different from a common shaft penetrating or rivet punching installation mode, so that the structure of an injection mold is simplified, and the assembly efficiency is also greatly improved.
According to the utility model, the size of the plastic tread platform is 388 x 361mm, the plastic tread platform belongs to a large platform, the plastic tread platform is repeatedly simulated and calculated by adopting mechanical simulation software, and the plastic tread platform with a better structure is designed through finite element analysis, so that a user is more stable and comfortable when standing.
According to the utility model, the auxiliary wheels are arranged, so that after the herringbone ladder is folded, a user can conveniently move the herringbone ladder by using the auxiliary wheels, and the herringbone ladder is convenient to carry.
Drawings
Fig. 1 is a schematic view of a herringbone ladder in an unfolded state.
FIG. 2 is a schematic view of an assembly of a plastic tread platform and a front rail.
FIG. 3 is a schematic view of the connection of the plastic tread platform and the front rail.
Fig. 4 is a partially enlarged view of the view in the direction a of fig. 1.
Fig. 5 is an enlarged schematic view of a portion B of fig. 1.
Detailed Description
The utility model is further described below with reference to the accompanying drawings and examples:
The embodiment is shown in combination with fig. 1 to 5, the herringbone ladder comprises a front ladder frame 1, a rear ladder frame 2, a switching lug 3, pedals 4 and a plastic tread platform 5 with tread area larger than 200 square feet, wherein the front ladder frame 1 and the rear ladder frame 2 are connected through the switching lug 3, the front ladder frame 1 and the rear ladder frame 2 are mutually unfolded or mutually folded, the pedals 4 are arranged at intervals on the front ladder frame 1, the front ladder frame 1 is positioned above the pedals 4 and provided with a front cross rod 11, the rear ladder frame 2 is provided with a rear cross rod 21, one side of the plastic tread platform 5 is provided with a clamping opening 6, the other side of the plastic tread platform 5 is provided with an opening 7, and meanwhile, the other side of the plastic tread platform 5 is movably provided with a safety hook device with a guide surface, which is close to the opening 7;
the front cross rod 11 is inserted into the clamping opening 6 so as to enable the plastic tread platform 5 to be movably connected with the front ladder frame 1, and the plastic tread platform 5 rotates by taking the front cross rod 11 as a rotation center;
When the front ladder frame 1 and the rear ladder frame 2 are mutually unfolded, the rear cross rod 21 enters the opening 7 and upwards supports the plastic trampling platform 5, and meanwhile, the safety hook device rotationally hooks the rear cross rod 21.
Further, the diameter of the inner cavity of the clamping opening 6 is larger than the diameter of the front cross rod 11, and the diameter of the inlet 61 of the clamping opening 6 is smaller than the diameter of the front cross rod 11.
Further, the plastic tread platform 5 is a plastic tread platform 5 meeting the tread strength requirement.
Further, the size of the plastic tread platform 5 is 388 x 361mm.
Further, the ladder further comprises a long connecting piece 8 and a short connecting piece 9, one side of the pedal 4 is arranged in the front ladder frame 1 in a rotating mode, the other side of the pedal 4 and the middle part of the plastic trampling platform 5 are respectively connected with the long connecting piece 8, one end of the short connecting piece 9 is connected with the long connecting piece 8, and the other end of the short connecting piece 9 is connected with the rear ladder frame 2.
Further, the rear stile 2 is provided with an auxiliary wheel 10 near its bottom upper side.
Further, the safety hook device comprises a safety hook 100 with a guide surface 200 and a spring, the safety hook 100 is movably connected with the plastic tread platform 5, the spring is arranged between the safety hook 100 and the plastic tread platform 5, and the spring forms a reset mechanism of the safety hook 100.
Working principle:
The size of the plastic tread platform 5 is 388 x 361mm, the plastic tread platform 5 belongs to a large platform, and the plastic tread platform 5 is repeatedly simulated and calculated by adopting mechanical simulation software, and the plastic tread platform 5 with a better structure is designed through finite element analysis, so that a user is more stable and comfortable when standing.
The inner cavity diameter of the clamping opening 6 of the plastic trampling platform 5 is larger than the diameter of the front cross rod 11, the diameter of the inlet 61 of the clamping opening 6 is smaller than the diameter of the front cross rod 11, and because the plastic trampling platform 5 has certain elasticity, when a worker installs the plastic trampling platform 5, the front cross rod 11 is aligned with the clamping opening 6, then the plastic trampling platform 5 is pressed downwards, the front cross rod 11 enters the clamping opening 6, and because the inner cavity diameter of the clamping opening 6 is larger than the diameter of the front cross rod 11, the plastic trampling platform 5 can freely rotate around the front cross rod 11, and furthermore, because the diameter of the inlet 61 of the clamping opening 6 is smaller than the diameter of the front cross rod 11, the front cross rod 11 and the clamping opening 6 cannot be separated, so that the use safety of the herringbone ladder is greatly improved, and the herringbone ladder is different from a common through shaft or rivet installation mode, so that the structure of an injection mold is simplified, and the assembly efficiency is greatly improved.
And (3) expanding the herringbone ladder:
The user spreads each other between the front ladder frame 1 and the rear ladder frame 2, realizes the double ladder and spreads, simultaneously pedal 4 and plastic tramples platform 5 and spreads in step under long connection piece 8 and short connection piece 9 effect, then the user steps on platform 5 with the plastic, the back horizontal pole 21 touches the safety hook 100 of taking guide surface 200, the elasticity that back horizontal pole 21 overcome the spring gradually promotes safety hook 100, after the back horizontal pole 21 slides into safety hook 100 along guide surface 200, the spring resets and promotes safety hook 100, maintain the state of safety hook 100 locking back horizontal pole 21, make the plastic trample platform 5 firmly block and put at the double ladder, improve the safety in utilization of double ladder.
Folding the herringbone ladder:
The user overcomes the elasticity of spring and presses safety hook 100, makes safety hook 100 break away from back horizontal pole 21, and then the user is with folding each other between preceding ladder frame 1 and the back ladder frame 2, and footboard 4 and plastic tramples platform 5 simultaneously and is folding in step under long connection piece 8 and short connection piece 9 effect, realizes the double ladder and closes, easy operation.
Through being provided with auxiliary wheel 10, after the double ladder is received, the user utilizes auxiliary wheel 10 to be convenient for remove the double ladder, makes things convenient for the double ladder transport, when guaranteeing ladder safety, and appearance wholeness is felt well, elegant appearance, and does not influence the packing size.
Claims (7)
1. The utility model provides a double ladder, tramples the platform including preceding ladder frame, back ladder frame, switching ear, footboard and trample the plastic that the area is greater than 200 square feet, pass through switching ear connection between preceding ladder frame and the back ladder frame, expand each other or mutually receive between preceding ladder frame and the back ladder frame and close its characterized in that:
The pedal is arranged at intervals on a front ladder frame, a front cross rod is arranged above the pedal on the front ladder frame, a rear cross rod is arranged on the rear ladder frame, a clamping opening is formed in one side of the plastic tread platform, an opening is formed in the other side of the plastic tread platform, and a safety hook device with a guide surface is movably arranged on the other side of the plastic tread platform, close to the opening;
The front cross rod is inserted into the clamping opening so that the plastic treading platform is movably connected with the front ladder frame, and the plastic treading platform rotates by taking the front cross rod as a rotation center;
When the front ladder frame and the rear ladder frame are mutually unfolded, the rear cross rod enters the opening and upwards supports the plastic trampling platform, and meanwhile, the safety hook device rotates to hook the rear cross rod tightly.
2. The herringbone ladder of claim 1, wherein: the inner cavity diameter of the clamping opening is larger than the diameter of the front cross rod, and the inlet diameter of the clamping opening is smaller than the diameter of the front cross rod.
3. The herringbone ladder of claim 1, wherein: the plastic tread platform meets the requirement of tread strength.
4. The herringbone ladder of claim 1, wherein: the plastic tread platform size is 388 x 361mm.
5. The herringbone ladder of claim 1, wherein: the pedal is characterized by further comprising a long connecting sheet and a short connecting sheet, one side of the pedal is arranged in the front ladder frame in a rotating mode, the other side of the pedal and the middle of the plastic trampling platform are respectively connected with the long connecting sheet, one end of the short connecting sheet is connected with the long connecting sheet, and the other end of the short connecting sheet is connected with the rear ladder frame.
6. The herringbone ladder of claim 1, wherein: the rear ladder frame is provided with auxiliary wheels close to the upper part of the bottom of the rear ladder frame.
7. The herringbone ladder of claim 1, wherein: the safety hook device comprises a safety hook with a guide surface and a spring, the safety hook is movably connected with the plastic treading platform, the spring is arranged between the safety hook and the plastic treading platform, and the spring forms a reset mechanism of the safety hook.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322863007.3U CN221032376U (en) | 2023-10-24 | 2023-10-24 | Herringbone ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322863007.3U CN221032376U (en) | 2023-10-24 | 2023-10-24 | Herringbone ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221032376U true CN221032376U (en) | 2024-05-28 |
Family
ID=91136978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322863007.3U Active CN221032376U (en) | 2023-10-24 | 2023-10-24 | Herringbone ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221032376U (en) |
-
2023
- 2023-10-24 CN CN202322863007.3U patent/CN221032376U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |