CN109367714B - Boarding ladder - Google Patents
Boarding ladder Download PDFInfo
- Publication number
- CN109367714B CN109367714B CN201811319470.9A CN201811319470A CN109367714B CN 109367714 B CN109367714 B CN 109367714B CN 201811319470 A CN201811319470 A CN 201811319470A CN 109367714 B CN109367714 B CN 109367714B
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- ladder
- hanging
- pedal
- projection
- rotating part
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- 238000009434 installation Methods 0.000 claims description 14
- 230000000712 assembly Effects 0.000 claims description 9
- 238000000429 assembly Methods 0.000 claims description 9
- 239000000725 suspension Substances 0.000 claims 1
- 230000009193 crawling Effects 0.000 abstract 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
- B63B27/14—Arrangement of ship-based loading or unloading equipment for cargo or passengers of ramps, gangways or outboard ladders ; Pilot lifts
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Ladders (AREA)
Abstract
The invention provides a boarding ladder, comprising: a rotating platform; the crawling ladder is fixed on the rotary platform; the hanging ladders are hinged with the rotating part at the head end, two adjacent hanging ladders are hinged with each other, and the tail end of the hanging ladder at the tail end is used for being placed on a deck; the first driver is connected between the rotating part and the hanging ladder at the head end and used for driving the hanging ladder at the head end to rotate in a vertical plane by taking a hinge point of the hanging ladder at the head end and the rotating part as a center; and the second driver is connected between the two adjacent hanging ladders and used for driving the two adjacent hanging ladders to form a preset included angle. The boarding ladder provided by the invention changes the integral structure in the prior art into a split structure, so that the length and the height in the vertical direction of the boarding ladder can be more conveniently adjusted, and the position of a deck can be better matched.
Description
Technical Field
The invention relates to the technical field of ramp gangways, in particular to a boarding ladder.
Background
The large oil tanker and cargo ship are greatly affected by the fluctuation of damp water and the full load and no load of the cargo due to long loading and unloading time when parked at a wharf, so that the great difference between the deck and the wharf brings great inconvenience to the working personnel for getting on and off the ship. The boarding ladder is a device for loading and unloading operation personnel and crew to safely and smoothly get on and off a ship in the process of docking an oil tanker in a modern large oil tanker dock.
The existing boarding ladder is of an integral structure, and the length of the boarding ladder and the height of the boarding ladder in the vertical direction cannot be conveniently adjusted so as to better match the position of a deck.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a boarding ladder, which changes the integral structure in the prior art into a split structure so as to more conveniently adjust the length and the height of the boarding ladder in the vertical direction and better match the position of a deck.
The invention provides a boarding ladder, comprising:
a rotary platform comprising: the rotary part can rotate in a horizontal plane relative to the fixed part;
the ladder stand is fixed on the rotating part, the upper end of the ladder stand is positioned on the top surface of the rotating part, and the lower end of the ladder stand is used for being placed on the ground of a wharf;
the hanging ladders are hinged with the rotating part at the head end, two adjacent hanging ladders are hinged with each other, and the tail end of the hanging ladder at the tail end is used for being placed on a deck;
the first driver is connected between the rotating part and the hanging ladder at the head end and used for driving the hanging ladder at the head end to rotate in a vertical plane by taking a hinge point of the hanging ladder at the head end and the rotating part as a center;
the second driver is connected between two adjacent hanging ladders and used for driving the two adjacent hanging ladders to form a preset included angle;
the first sensor is arranged on the rotary platform and used for detecting a first angle value of the rotating part rotating relative to the fixed part and sending the first angle value as a first signal;
the second sensor is arranged between the rotating part and the hanging ladder positioned at the head section, and is used for detecting a second angle value between the hanging ladder positioned at the head end and the rotating part and sending the second angle value out as a second signal;
the third sensor is arranged between two adjacent hanging ladders and used for detecting a third angle value between the two adjacent hanging ladders and sending out a third signal;
an input device for inputting predetermined position information, the predetermined position information being a predetermined position of a tail end of the hanging ladder located at a tail end;
and the controller is used for receiving the first signal, the second signal, the third signal and the preset position information and sending a control instruction according to the first signal, the second signal, the third signal and the preset position information, wherein the control instruction is used for controlling the first driver and the second driver to act.
Further, each of the hanging ladders includes: a body assembly; a plurality of pedal assemblies disposed along a length of the body assembly, each of the pedal assemblies comprising: the pedal device comprises a pedal unit, an installation shaft and at least one connecting piece, wherein the installation shaft is installed on the main body assembly, one end of the connecting piece is sleeved on the installation shaft and can rotate around the axis of the installation shaft, and the pedal unit is fixed on the connecting piece; the number of the pull rods is equal to that of the connecting pieces in each pedal assembly, the pull rods correspond to the positions of the connecting pieces one to one, and the other end of each connecting piece in each pedal assembly is hinged to the pull rod;
the boarding ladder comprises a plane P which is vertical to the axis of the mounting shaft;
wherein the main body assemblies in two adjacent hanging ladders are hinged with each other at adjacent ends, the projection of the hinge point on the plane P forms a first projection point A, the pull rods in two adjacent hanging ladders are hinged with each other at adjacent ends, and the projection of the hinge point on the plane P forms a second projection point B, and in addition, in each pedal assembly in each hanging ladder: the projection of the hinge point of the connecting piece on the pull rod on the plane P forms a third projection point C, the projection of the rotation center point of the connecting piece on the plane P forms a fourth projection point D, and the first projection point A, the second projection point B, the third projection point C and the fourth projection point D form four vertexes of a parallelogram.
Furthermore, the main body assembly in the hanging ladder at the head end is hinged to the rotating part, the projection of a hinge point on the plane P forms a fifth projection point E, the pull rod in the hanging ladder at the head end is hinged to the rotating part, the projection of the hinge point on the plane P forms a sixth projection point F, and the first projection point a, the second projection point B, the fifth projection point E and the sixth projection point F form four vertexes of a parallelogram.
Further, the first driver and the second driver are both oil cylinders.
Further, the body assembly includes: the guardrail comprises two side plate units arranged in parallel, a supporting unit connected between the two side plate units and guardrail units arranged on the side plate units and corresponding to the side plate units one to one, wherein one end of each side plate unit is hinged to the fixed platform.
Further, the support unit includes a straight bar support and/or an "X" shaped support.
Further, the pedal unit comprises a flat pedal body and flat first clamping plates arranged at two ends of the pedal body, each first clamping plate is vertically fixed on the pedal body, each first clamping plate is provided with an installation hole, the first clamping plates are sleeved on the installation shafts through the installation holes, and the connecting pieces are respectively arranged at two ends of the pedal unit and respectively fixedly connected with the first clamping plates.
Furthermore, the pedal unit further comprises a plurality of second clamping plates which are shaped like plates and are arranged along the length direction of the pedal body, each second clamping plate is vertically fixed on the pedal body, a notch is formed in the tail end of each second clamping plate, and each second clamping plate is clamped on the mounting shaft through the notch.
The boarding ladder provided by the invention changes the integral structure in the prior art into a split structure, so that the length and the height in the vertical direction of the boarding ladder can be more conveniently adjusted, and the position of a deck can be better matched.
Drawings
FIG. 1 is a schematic cross-sectional view of the boarding ladder of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is an enlarged view of detail J of FIG. 1;
FIG. 4 is an enlarged view of a detail K of FIG. 1;
FIG. 5 is a schematic perspective view of a main body unit according to the present invention;
FIG. 6 is a schematic structural view of a main body unit according to the present invention;
FIG. 7 is a left side view of FIG. 6;
FIG. 8 is a schematic perspective view of the pedal assembly of the present invention;
fig. 9 is a schematic perspective view of a pedal unit according to the present invention.
In the figure, 1, a second driver, 2, a rotary platform, 201, a fixed part, 202, a rotary part, 100, a hanging ladder, 3, a main body component, 301, a side plate unit, 302, a supporting unit, 302A, a straight rod supporting piece, 302B, an X-shaped supporting piece, 303, a railing unit, 4, a pull rod, 5, a pedal component, 501, a pedal unit, 501A, a pedal main body, 501B, a first clamping plate, 501C, a second clamping plate, 502, a connecting piece, 503, a mounting shaft, 6, a first driver and 7, a ladder.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
A boarding ladder, as shown in FIGS. 1 to 3, includes:
a rotating platform 2 comprising: a fixed part 201 fixedly installed on the ground and a rotating part 202 installed above the fixed part 201, wherein the rotating part 202 can rotate in a horizontal plane relative to the fixed part 201;
a ladder stand 7 fixed to the rotating portion 202, an upper end of the ladder stand 7 being positioned on a top surface of the rotating portion 202, a lower end of the ladder stand 7 being placed on a ground of a dock, and a person climbing up to the top surface of the rotating portion 202 through the ladder stand 7;
the hanging ladders 100 are hinged to the rotating portion 202, the hanging ladder 100 located at the head end is hinged to the rotating portion 202, two adjacent hanging ladders 100 are hinged to each other, the tail end of the hanging ladder 100 located at the tail end is used for being placed on a deck, and personnel climb onto the deck along the hanging ladders 100 from the top surface of the rotating portion 202;
the first driver 6 is connected between the rotating portion 202 and the hanging ladder 100 at the head end, and is configured to drive the hanging ladder 100 at the head end to rotate in a vertical plane around a hinge point between the hanging ladder 100 at the head end and the rotating portion 202;
the second driver 1 is connected between two adjacent hanging ladders 100 and used for driving the two adjacent hanging ladders 100 to form a preset included angle;
the first sensor is arranged on the rotary platform and used for detecting a first angle value of the rotating part rotating relative to the fixed part and sending the first angle value as a first signal;
the second sensor is arranged between the rotating part and the hanging ladder positioned at the head section, and is used for detecting a second angle value between the hanging ladder positioned at the head end and the rotating part and sending the second angle value out as a second signal;
the third sensor is arranged between two adjacent hanging ladders and used for detecting a third angle value between the two adjacent hanging ladders and sending out a third signal;
an input device for inputting predetermined position information, the predetermined position information being a predetermined position of a tail end of the hanging ladder located at a tail end;
and the controller is used for receiving the first signal, the second signal, the third signal and the preset position information and sending a control instruction according to the first signal, the second signal, the third signal and the preset position information, wherein the control instruction is used for controlling the first driver and the second driver to act.
The boarding ladder provided by the invention changes the integral structure in the prior art into a split structure, so that the length and the height in the vertical direction of the boarding ladder can be more conveniently adjusted, and the position of a deck can be better matched. The operating personnel of the boarding ladder obtains the preset position of the tail end of the hanging ladder at the tail end according to the position of a deck, the preset position (which can be a space coordinate) is input into the controller through the input device, the controller simultaneously collects the first signal, the second signal and the third signal to obtain the real-time first angle, the real-time second angle and the real-time third angle, the control instruction is sent out through comprehensive calculation to control the first driver 6 and the second driver 1 to act, the tail end of the hanging ladder at the tail end is moved to the preset position, and automatic control is achieved. In order to allow the end of the ladder at the tail end to better overlap the deck, rollers may be mounted at the end of the ladder at the tail end.
In an alternative embodiment of this embodiment, each of the ladders 100 includes:
a main body component 3;
a plurality of pedal assemblies 5 arranged along the length of the body assembly 3, as shown in fig. 8 and 9, each pedal assembly 5 including: the pedal device comprises a pedal unit 501, a mounting shaft 503 and at least one connecting piece 502, wherein the mounting shaft 503 is mounted on the main body component 3, one end of the connecting piece 502 is sleeved on the mounting shaft 503 and can rotate around the axis of the mounting shaft 503, and the pedal unit 501 is fixed on the connecting piece 502, so that the pedal unit 501 can rotate along with the rotation of the connecting piece 502;
the number of the pull rods 4 is equal to that of the connecting pieces 502 in each pedal assembly 5, the pull rods 4 correspond to the positions of the connecting pieces 502 one by one, and the other end of each connecting piece in each pedal assembly 4 is hinged to the pull rod 4;
the boarding ladder is a plane P which is vertical to the axis of the mounting shaft 503;
wherein the main body components 3 in two adjacent hanging ladders 100 are hinged with each other at the adjacent ends, the projection of the hinge point on the plane P forms a first projection point A, the pull rods 4 in two adjacent hanging ladders 100 are hinged with each other at the adjacent ends, and the projection of the hinge point on the plane P forms a second projection point B, and in addition, in each pedal component 5 in each hanging ladder 100: the projection of the hinge point of the connecting piece 502 on the pull rod 4 on the plane P forms a third projection point C, the projection of the rotation center point of the connecting piece 503 on the plane P forms a fourth projection point D, and the first projection point a, the second projection point B, the third projection point C and the fourth projection point D form four vertexes of a parallelogram (see fig. 3). A line segment L2 between the first and second proxels a and B is always parallel to a line segment L1 between the third and fourth proxels C and D. Because the connecting line segment L1 formed in each pedal assembly 5 is parallel to the connecting line segment L2 in the plane P, the pedal assemblies 5 always act in the same direction, and the purpose of consistent gradient of the pedals between the adjacent hanging ladders 100 is achieved. That is, the slopes of the steps on two ladders 100 are consistent regardless of the angle between the two adjacent ladders 100.
In the above embodiment, in order to ensure that the gradient of the pedal is always constant, as shown in fig. 1 and 4, the main body assembly 3 in the first-end hanging ladder 100 is hinged to the rotating portion 202, the projection of the hinge point on the plane P forms the fifth projection point E, the pull rod 4 in the first-end hanging ladder 100 is hinged to the rotating portion 202, the projection of the hinge point on the plane P forms the sixth projection point F, and the first projection point a, the second projection point B, the fifth projection point E and the sixth projection point F form four vertexes of a parallelogram. That is, the line segment L2 (see fig. 3) formed at the hinge of any two adjacent ladders 100 is parallel to and equal in length to the line segment L3 formed at the hinge of the rotating part 202 and the ladder 100 located at the head end, and in the above embodiment, the line segment L1 is always parallel to the line segment L2, and therefore, the line segment L1 is always parallel to L3. Since the positions of the five projected point E and the sixth projected point F are not changed and the line segment L3 is not changed, the direction of the line segment L1 is always unchanged. The pedal unit 501 is fixed to the link 502, so the gradient of the pedal is always constant.
In an optional implementation manner of this embodiment, the first actuator 6 and the second actuator 1 are both oil cylinders.
In an alternative embodiment of this embodiment, as shown in fig. 5 to 7, the main body assembly 3 includes: the side plate unit comprises two side plate units 301 arranged in parallel, a supporting unit 302 connected between the two side plate units 301, and a railing unit 302 arranged on the side plate units 301 and corresponding to the side plate units 301 one by one, wherein one end of each side plate unit 301 is hinged with a fixed platform 2. Specifically, the supporting unit 302 may be a straight bar supporting member 302 or an "X" shaped supporting member 302B or both the straight bar supporting member 302 and the "X" shaped supporting member 302B. In this embodiment, two drivers 1 may be provided, corresponding to the two side plate units 301, respectively, to ensure the stability of the boarding ladder lifting structure.
In an alternative embodiment of the present embodiment, as shown in fig. 8 and 9, each pedal assembly 5 includes: the pedal device comprises a pedal unit 501, a mounting shaft 503 and two connecting pieces 502, wherein the two connecting pieces 502 are respectively fixed at two ends of the pedal unit 501, the mounting shaft 503 is mounted on the main body assembly 3, and one end of each connecting piece 502 is sleeved on the mounting shaft 503 and can rotate around the axis of the mounting shaft 503. In this embodiment, two tie rods 4 should be provided, and the tie rods 4 are located at both ends of the pedal unit 501 corresponding to the position of the link 502. Two connecting members 502 are provided in each pedal assembly 5 to ensure stability of the pedal unit 501, and three connecting members 502 or more connecting members 502 may be provided to make the pedal unit 501 more stable. In the present embodiment, in addition to the mode of stabilizing the pedal unit 501 by providing the plurality of links 502, the following mode may be adopted: the pedal unit 501 comprises a flat pedal body 501A and flat first clamping plates 501B located at two ends of the pedal body 501A, each first clamping plate 501B is vertically fixed on the pedal body 501A, each first clamping plate 501B is provided with a mounting hole, the first clamping plate 501B is sleeved on the mounting shaft 503 through the mounting hole, and two connecting pieces 502 are respectively arranged at two ends of the pedal unit 501 and are respectively and fixedly connected with the first clamping plates 501B. Further, the pedal unit 501 further includes a plurality of second engagement plates 501C arranged along the length direction of the pedal body 501A, each second engagement plate 501C is vertically fixed to the pedal body 501A, a notch is formed at the end of each second engagement plate 501C, and each second engagement plate 501C is engaged with the mounting shaft 503 through the notch.
The scope of the invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (7)
1. A boarding ladder, characterized by comprising:
a rotary platform comprising: the rotary part can rotate in a horizontal plane relative to the fixed part;
the ladder stand is fixed on the rotating part, the upper end of the ladder stand is positioned on the top surface of the rotating part, and the lower end of the ladder stand is used for being placed on the ground of a wharf;
the hanging ladders are hinged with the rotating part at the head end, two adjacent hanging ladders are hinged with each other, and the tail end of the hanging ladder at the tail end is used for being placed on a deck; each of the hanging ladders includes: a body assembly; a plurality of pedal assemblies disposed along a length of the body assembly, each of the pedal assemblies comprising: the pedal device comprises a pedal unit, an installation shaft and at least one connecting piece, wherein the installation shaft is installed on the main body assembly, one end of the connecting piece is sleeved on the installation shaft and can rotate around the axis of the installation shaft, and the pedal unit is fixed on the connecting piece;
the first driver is connected between the rotating part and the hanging ladder at the head end and used for driving the hanging ladder at the head end to rotate in a vertical plane by taking a hinge point of the hanging ladder at the head end and the rotating part as a center;
the second driver is connected between two adjacent hanging ladders and used for driving the two adjacent hanging ladders to form a preset included angle;
the first sensor is arranged on the rotary platform and used for detecting a first angle value of the rotating part rotating relative to the fixed part and sending the first angle value as a first signal;
the second sensor is arranged between the rotating part and the hanging ladder positioned at the head section, and is used for detecting a second angle value between the hanging ladder positioned at the head end and the rotating part and sending the second angle value out as a second signal;
the third sensor is arranged between two adjacent hanging ladders and used for detecting a third angle value between the two adjacent hanging ladders and sending out a third signal;
an input device for inputting predetermined position information, the predetermined position information being a predetermined position of a tail end of the hanging ladder located at a tail end;
the controller is used for receiving the first signal, the second signal, the third signal and the preset position information and sending a control instruction according to the first signal, the second signal, the third signal and the preset position information, wherein the control instruction is used for controlling the first driver and the second driver to act;
each suspension ladder further comprises at least one pull rod, the number of the pull rods is equal to that of the connecting pieces in each pedal assembly, the pull rods correspond to the connecting pieces in position one to one, and the other end of each connecting piece in each pedal assembly is hinged to the pull rod;
the boarding ladder comprises a plane (P) which is perpendicular to the axis of the mounting shaft;
wherein the body assemblies in two adjacent said steps are hinged to each other at adjacent ends, the projection of the hinge point on the plane (P) forms a first projection point (A), the pull rods in two adjacent steps are hinged to each other at adjacent ends, the projection of the hinge point on the plane (P) forms a second projection point (B), and further, in each of the pedal assemblies in each of the steps: the projection of the hinge point of the connecting piece on the pull rod on the plane (P) forms a third projection point (C), the projection of the rotation center point of the connecting piece on the plane (P) forms a fourth projection point (D), and the first projection point (A), the second projection point (B), the third projection point (C) and the fourth projection point (D) form four vertexes of a parallelogram.
2. The boarding ladder of claim 1, wherein the main body assembly in the first-end hanging ladder is hinged to the rotating part, a projection of a hinge point on the plane (P) forms a fifth projection point (E), the pull rod in the first-end hanging ladder is hinged to the rotating part, a projection of the hinge point on the plane (P) forms a sixth projection point (F), and the first projection point (a), the second projection point (B), the fifth projection point (E) and the sixth projection point (F) form four vertices of a parallelogram.
3. The boarding ladder of claim 1, wherein the first drive and the second drive are both cylinders.
4. The boarding ladder of claim 1, wherein the body assembly comprises: the guardrail comprises two side plate units arranged in parallel, a supporting unit connected between the two side plate units and guardrail units arranged on the side plate units and corresponding to the side plate units one to one, wherein one end of each side plate unit is hinged to the fixed platform.
5. The boarding ladder of claim 4, wherein the support unit comprises a straight bar support and/or an "X" shaped support.
6. The boarding ladder of claim 1, wherein the pedal unit comprises a flat-plate-shaped pedal body and flat-plate-shaped first clamping plates positioned at two ends of the pedal body, each first clamping plate is vertically fixed on the pedal body, each first clamping plate is provided with an installation hole, the first clamping plates are sleeved on the installation shafts through the installation holes, and the two connecting pieces are respectively arranged at two ends of the pedal unit and respectively fixedly connected with the first clamping plates.
7. The boarding ladder of claim 6, wherein the pedal unit further comprises a plurality of second engagement plates arranged along the length direction of the pedal body, each second engagement plate is vertically fixed on the pedal body, a notch is formed at the tail end of each second engagement plate, and each second engagement plate is engaged with the mounting shaft through the notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811319470.9A CN109367714B (en) | 2018-11-07 | 2018-11-07 | Boarding ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811319470.9A CN109367714B (en) | 2018-11-07 | 2018-11-07 | Boarding ladder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109367714A CN109367714A (en) | 2019-02-22 |
| CN109367714B true CN109367714B (en) | 2020-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811319470.9A Expired - Fee Related CN109367714B (en) | 2018-11-07 | 2018-11-07 | Boarding ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109367714B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485259A (en) * | 2019-08-16 | 2019-11-22 | 青岛古镇口军民融合舰船装备技术保障有限公司 | A kind of tide is adaptively gone on board equipment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2652332A1 (en) * | 1989-09-25 | 1991-03-29 | Prevost Henri | Gangway intended to join a ship to a quay |
| US5657832A (en) * | 1996-02-28 | 1997-08-19 | Stevens; Robert C. | Stairway for connecting a floating member to a stationary member |
| EP2240361B1 (en) * | 2007-11-12 | 2015-06-24 | Peter A. Müller | Segmented platform |
| CN105923110B (en) * | 2016-04-27 | 2018-10-02 | 武昌船舶重工集团有限公司 | A kind of compensation of undulation intelligently steps on quadrupler |
| CN205819491U (en) * | 2016-06-30 | 2016-12-21 | 江阴市福达船舶配件制造有限公司 | Self-adjustable level is marked time aerial device |
| CN207141326U (en) * | 2017-09-07 | 2018-03-27 | 江阴市福达船舶配件制造有限公司 | Mark time horizontal self formula boarding ladder |
-
2018
- 2018-11-07 CN CN201811319470.9A patent/CN109367714B/en not_active Expired - Fee Related
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| CN109367714A (en) | 2019-02-22 |
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