CN112027840B - Elevator pit ladder stand device - Google Patents
Elevator pit ladder stand device Download PDFInfo
- Publication number
- CN112027840B CN112027840B CN202010918893.3A CN202010918893A CN112027840B CN 112027840 B CN112027840 B CN 112027840B CN 202010918893 A CN202010918893 A CN 202010918893A CN 112027840 B CN112027840 B CN 112027840B
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- China
- Prior art keywords
- ladder
- elevator
- switch
- elevator pit
- locking means
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0087—Devices facilitating maintenance, repair or inspection tasks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0043—Devices enhancing safety during maintenance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C9/00—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes
- E06C9/06—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted
- E06C9/08—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted with rigid longitudinal members
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Ladders (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The invention discloses an elevator pit ladder climbing device, which comprises: the crawling ladder is rotatably connected to a fixed support in an elevator pit; the safety switch is arranged on the wall of the elevator shaft or the fixed bracket and is connected in series on a safety control loop of the elevator; and the switch trigger piece is arranged on the ladder stand and can rotate along with the ladder stand. When the ladder stand is in a safe storage position without interference with a car and a counterweight of the elevator, the safety switch is separated from the switch trigger and is in a closed position to allow the elevator to run; when the ladder is rotated away from the safe storage position, the safety switch is driven to an off position by the switch trigger to cut off an elevator safety control loop and prohibit elevator operation. Therefore, the invention can adjust the distance between the ladder stand and the shaft wall and the floor door opening by rotating the ladder stand, and is safe to use.
Description
Technical Field
The invention relates to an elevator pit ladder climbing device.
Background
At present, the crawling ladder can only be fixedly installed at a certain preset position in an elevator pit, and the distance between the crawling ladder and the wall of the elevator shaft and the door of an elevator shaft layer cannot be adjusted. This can lead to two kinds of situations, the first situation is hardly guaranteed under the less circumstances of elevator well size that the distance of cat ladder to elevator well wall is not less than 200mm, the second situation can lead to the distance of cat ladder to elevator well floor gate to be greater than 800mm under the more circumstances of elevator well size. However, according to the EN81-20 regulations of the elevator industry, it is required that the distance from the back of a ladder stand installed in an elevator pit to the wall of an elevator hoistway must be not less than 200mm of space and the distance to the doorway of the hoistway layer must not exceed 800 mm. Therefore, the existing fixed ladder cannot meet the relevant regulations of the elevator industry.
Disclosure of Invention
An object of the present invention is to solve at least one of the above problems and disadvantages in the prior art.
According to an aspect of the present invention, there is provided an elevator pit ladder apparatus comprising: the crawling ladder is rotatably connected to a fixed support in an elevator pit; the safety switch is arranged on the wall of the elevator shaft or the fixed bracket and is connected in series on a safety control loop of the elevator; and the switch trigger piece is arranged on the ladder stand and can rotate along with the ladder stand. When the ladder stand is in a safe storage position without interference with a car and a counterweight of the elevator, the safety switch is separated from the switch trigger and is in a closed position to allow the elevator to run; when the ladder is rotated away from the safe storage position, the safety switch is driven to an off position by the switch trigger to cut off an elevator safety control loop and prohibit elevator operation.
According to an exemplary embodiment of the present invention, the ladder stand is rotatably connected to the fixing bracket by a hinge, and the hinge includes a first connecting seat fixed to the ladder stand, a second connecting seat fixed to the fixing bracket, and a pivot shaft passing through the first connecting seat and the second connecting seat in a vertical direction.
According to another exemplary embodiment of the invention the elevator pit ladder apparatus further comprises a switch mounting bracket to which the safety switch is fixed, the switch mounting bracket being fixed to the hoistway wall.
According to another exemplary embodiment of the present invention, the switch activating member is mounted on the ladder stand in a freely movable manner in the vertical direction and is supported on the switch mounting bracket so that the switch activating member does not move when the ladder stand is moved in the vertical direction.
According to another exemplary embodiment of the present invention, the switch mounting bracket is connected to or is a part of the second connection seat, and the fixing bracket is fixed to the hoistway wall.
According to another exemplary embodiment of the present invention, the first connecting seat is received in an inner receiving space defined by the second connecting seat, and a length of the pivot shaft in a vertical direction is greater than a length of the first connecting seat in the vertical direction to allow the ladder stand to move a predetermined distance in the vertical direction.
According to another exemplary embodiment of the present invention, the elevator pit ladder apparatus further comprises a locking means fixed on the bottom surface of the elevator pit for maintaining the ladder rotated to a predetermined position at the predetermined position to prevent the ladder from rotating.
According to another exemplary embodiment of the invention the elevator pit ladder arrangement comprises a plurality of locking arrangements fixed at a plurality of different positions on the floor of the elevator pit for holding the ladder at a plurality of different positions, respectively.
According to another exemplary embodiment of the invention, the ladder stand is movable in a vertical direction from a locked position in engagement with the locking device to an unlocked position out of engagement with the locking device or from an unlocked position out of engagement with the locking device to a locked position in engagement with the locking device.
According to another exemplary embodiment of the invention the ladder stand comprises a first and a second longitudinal bar opposite to each other and a number of transverse bars connected between the first and the second longitudinal bar, which are evenly spaced apart in the longitudinal direction of the ladder stand.
According to another exemplary embodiment of the invention the first longitudinal bar of the ladder is rotatably connected to the fixing support via the hinge, and the lower end of the second longitudinal bar of the ladder is adapted to be engaged in the locking device to limit the rotation of the ladder.
According to another exemplary embodiment of the invention the locking device has a holding groove matching the lower end of the second longitudinal bar of the ladder, the lower end of the second longitudinal bar of the ladder being adapted to be inserted into the holding groove of the locking device, thereby limiting the turning of the ladder.
According to another exemplary embodiment of the invention the elevator pit ladder arrangement comprises two locking arrangements for holding the ladder in a first position and a second position, respectively.
According to another exemplary embodiment of the invention the ladder stand is turned around the pivot axis by an angle equal to degrees when turning around the pivot axis from the first position to the second position.
According to another exemplary embodiment of the present invention, the switch activating member comprises a main body portion fitted over the first longitudinal bar of the ladder stand, a support portion supported on the switch mounting bracket, and an activating portion for activating the safety switch; the body portion of the switch activating member is free to move vertically relative to the first longitudinal bar of the ladder stand but is prevented from rotating relative to the first longitudinal bar of the ladder stand so that the switch activating member rotates only with the ladder stand and does not move vertically with the ladder stand.
In the aforementioned various exemplary embodiments according to the invention, the ladder stand is pivotally connected to the fixed bracket, so that the distance between the ladder stand and the elevator shaft wall and the elevator shaft landing door can be adjusted by pivoting the ladder stand so that the distance of the ladder stand to the elevator shaft wall and the elevator shaft landing door meets the EN81-20 regulations of the elevator industry. In addition, the safety switch can improve the safety in use of cat ladder.
Other objects and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings, and may assist in a comprehensive understanding of the invention.
Drawings
Fig. 1 shows a schematic view of an elevator pit ladder arrangement according to an exemplary embodiment of the invention;
fig. 2a shows an enlarged schematic view of the hinge and safety switch of the elevator pit ladder apparatus shown in fig. 1, wherein the ladder is in a safe storage position out of interference with the car and counterweight of the elevator;
FIG. 2b shows a schematic view of the switch trigger not moving when the ladder is moving in a vertical direction;
figure 2c shows a schematic view of the switch trigger triggering the safety switch when the ladder is rotated away from the safe storage position;
fig. 3 shows an enlarged schematic view of the locking device of the elevator pit ladder apparatus shown in fig. 1;
figure 4 shows a schematic view of the ladder stand being separated from the locking device shown in figure 3 by moving the ladder stand upwardly;
figure 5 shows a schematic view of the ladder being rotated from a first position to a second position by rotating the ladder;
figure 6 shows a schematic view of a ladder being held in another locking device.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention and should not be construed as limiting the invention.
Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.
According to one general technical concept of the present invention, there is provided an elevator pit ladder apparatus including: the crawling ladder is rotatably connected to a fixed support in an elevator pit; the safety switch is arranged on the wall of the elevator shaft or the fixed bracket and is connected in series on a safety control loop of the elevator; and the switch trigger piece is arranged on the ladder stand and can rotate along with the ladder stand. When the ladder stand is in a safe storage position without interference with a car and a counterweight of the elevator, the safety switch is separated from the switch trigger and is in a closed position to allow the elevator to run; when the ladder is rotated away from the safe storage position, the safety switch is driven to an off position by the switch trigger to cut off an elevator safety control loop and prohibit elevator operation.
Fig. 1 shows a schematic view of an elevator pit ladder arrangement according to an exemplary embodiment of the invention.
As shown in fig. 1, in the illustrated embodiment the elevator pit ladder assembly comprises a ladder 10, a safety switch 200 and a switch trigger 210. The ladder 10 is pivotally connected to a fixed support (not shown) in the pit of the elevator. Accordingly, the distance between the ladder stand 10 and the hoistway wall and the hoistway floor doorway can be adjusted by turning the ladder stand 10 so that the distance of the ladder stand 10 to the hoistway wall is not less than 200mm and the distance to the hoistway floor doorway is not more than 800 mm.
As shown in fig. 1, in the illustrated embodiment, the safety switch 200 is mounted to a hoistway wall (not shown) or a fixed bracket and connected in series to a safety control circuit (not shown) of the elevator. The switch activating member 210 is mounted on the ladder 10 to be rotatable with the ladder 10.
Fig. 2a shows an enlarged schematic view of the hinge and safety switch of the elevator pit ladder apparatus shown in fig. 1, wherein the ladder is in a safe storage position out of interference with the car and counterweight of the elevator; FIG. 2b shows a schematic view of the switch trigger not moving when the ladder is moving in a vertical direction; figure 2c shows a schematic view of the switch trigger triggering the safety switch when the ladder is rotated away from the safe storage position.
As shown in fig. 1 and 2a-2c, in the illustrated embodiment the ladder 10 is pivotally connected to the fixed support by a hinge 100. The hinge 100 includes a first connecting block 110 fixed to the ladder 10, a second connecting block 130 fixed to the fixing bracket, and a pivot shaft 120 passing through the first and second connecting blocks 110 and 130 in a vertical direction.
As shown in fig. 1 and 2a-2b, in the illustrated embodiment, when the ladder 10 is in a safe storage position without interfering with the car and counterweight of the elevator, the safety switch 200 is disengaged from the switch activating member 210 and is in a closed position to allow the elevator to run.
As shown in fig. 2c, in the illustrated embodiment, when the ladder 10 is rotated away from the safe storage position, the safety switch 200 is actuated to an open position by the switch trigger 210 to cut off the elevator safety control loop and disable elevator operation. In this way it is ensured that the worker will not be hit by the car and counterweight when using the ladder 10.
As shown in fig. 1 and 2a-2c, in the illustrated embodiment the elevator pit ladder apparatus further comprises a switch mounting 220, the safety switch 200 being secured to the switch mounting 220, the switch mounting 220 being secured to the hoistway wall.
As shown in fig. 2a and 2b, in the illustrated embodiment, the switch activating member 210 is mounted on the ladder stand 10 in a freely movable manner in the vertical direction and is supported on the switch mounting block 220 so that the switch activating member 210 does not move when the ladder stand 10 is moved in the vertical direction. Therefore, the position of the switch activating member 210 with respect to the safety switch 200 is not changed while the ladder 10 is vertically moved.
As shown in fig. 1 and 2a-2c, in the illustrated embodiment, the first connecting seat 110 is received in an inner receiving space defined by the second connecting seat 130, and the length of the pivot shaft 120 in the vertical direction is greater than the length of the first connecting seat 110 in the vertical direction to allow the ladder stand 10 to move a predetermined distance in the vertical direction.
Fig. 3 shows an enlarged schematic view of the locking means 41, 42 of the elevator pit ladder apparatus shown in fig. 1; figure 4 shows a schematic view of the ladder 10 being separated from one of the locking devices 41 shown in figure 3 by moving the ladder 10 upwardly; figure 5 shows a schematic view of the ladder 10 being rotated from a first position to a second position by rotating the ladder 10; figure 6 shows a schematic view of a ladder being held in a further locking device 42.
As shown in fig. 1 to 6, in the illustrated embodiment the elevator pit ladder assembly further comprises locking means 41, 42 fixed to the floor of the elevator pit, the locking means 41, 42 serving to hold the ladder 10 rotated to a predetermined position at the predetermined position to prevent the ladder 10 from rotating.
As shown in fig. 1 to 6, in the illustrated embodiment the elevator pit ladder apparatus comprises a plurality of locking devices 41, 42, the plurality of locking devices 41, 42 being secured at a plurality of different locations on the floor of the elevator pit for holding the ladder 10 at a plurality of different locations respectively.
As shown in fig. 1 to 6, in the illustrated embodiment the ladder 10 is movable in a vertical direction from a locked position in engagement with the locking means 41, 42 to an unlocked position out of engagement with the locking means 41, 42 or from an unlocked position out of engagement with the locking means 41, 42 to a locked position in engagement with the locking means 41, 42.
As shown in fig. 1 to 6, in the illustrated embodiment the ladder 10 comprises a first longitudinal bar 11 and a second longitudinal bar 12 opposite each other and a plurality of transverse bars 13 connected between the first longitudinal bar 11 and the second longitudinal bar 12, the plurality of transverse bars 13 being evenly spaced apart in the longitudinal direction of the ladder 10.
As shown in figures 1 to 6, in the illustrated embodiment the first longitudinal bar 11 of the ladder 10 is pivotally connected to the fixed support via a hinge 100 and the lower end of the second longitudinal bar 12 of the ladder 10 is adapted to be engaged in locking means 41, 42 to restrict the ladder 10 from pivoting.
As shown in figures 1 to 6, in the illustrated embodiment the locking means 41, 42 has a retaining slot which mates with the lower end of the second longitudinal bar 12 of the ladder 10, the lower end of the second longitudinal bar 12 of the ladder 10 being adapted to be inserted into the retaining slot of the locking means 41, 42 to thereby restrict rotation of the ladder 10.
As shown in fig. 1 to 6, in the illustrated embodiment the elevator pit ladder assembly comprises two locking devices 41, 42, the two locking devices 41, 42 being adapted to hold the ladder 10 in a first position (the position shown in fig. 3) and a second position (the position shown in fig. 6), respectively.
As shown in figures 1 to 6, in the illustrated embodiment, when the ladder 10 is rotated about the pivot axis 120 from the first position shown in figure 3 to the second position shown in figure 6, the angle of rotation of the ladder 10 about the pivot axis 120 is equal to 90 degrees.
As shown in fig. 1 to 6, in the illustrated embodiment, the switch activating member 210 includes a main body portion 211 fitted over the first longitudinal bar 11 of the ladder stand 10, a support portion 213 supported on the switch mounting bracket 220, and an activating portion 212 for activating the safety switch 200. The body portion 211 of the switch activating member 210 is free to move vertically relative to the first longitudinal bar 11 of the ladder stand 10 but is not rotatable relative to the first longitudinal bar 11 of the ladder stand 10 so that the switch activating member 210 rotates only with the ladder stand 10 and does not move vertically with the ladder stand 10.
It will be appreciated by those skilled in the art that the embodiments described above are exemplary and can be modified by those skilled in the art, and that the structures described in the various embodiments can be freely combined without conflict in structure or principle.
Although the present invention has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of preferred embodiments of the present invention and should not be construed as limiting the invention.
Although a few embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the appended claims and their equivalents.
It should be noted that the word "comprising" does not exclude other elements or steps, and the words "a" or "an" do not exclude a plurality. Furthermore, any reference signs in the claims shall not be construed as limiting the scope of the invention.
Claims (12)
1. An elevator pit ladder apparatus, comprising:
a ladder (10) rotatably connected to a fixed support in the elevator pit;
the safety switch (200) is arranged on the wall of the elevator shaft or the fixed bracket and is connected in series on the safety control loop of the elevator; and
a switch trigger (210) which is arranged on the ladder (10) and can rotate along with the ladder (10),
when the ladder (10) is in a safe storage position not interfering with the car and the counterweight of the elevator, the safety switch (200) is separated from the switch trigger (210) and is in a closed position to allow the elevator to run;
when the ladder (10) is rotated away from the safe storage position, the safety switch (200) is driven to an open position by the switch trigger (210) to cut off an elevator safety control loop and prohibit elevator operation;
the elevator pit ladder climbing device further comprises a switch mounting bracket (220), the safety switch (200) is fixed on the switch mounting bracket (220), and the switch mounting bracket (220) is fixed on an elevator shaft wall or a fixed bracket; the switch activating member (210) is mounted on the ladder stand (10) in a freely movable manner in a vertical direction and is supported on the switch mounting bracket (220) so that the switch activating member (210) does not move when the ladder stand (10) is moved in the vertical direction.
2. The elevator pit ladder apparatus of claim 1, wherein:
the ladder (10) is rotatably connected to the fixing bracket by a hinge (100), and the hinge (100) comprises a first connecting seat (110) fixed on the ladder (10), a second connecting seat (130) fixed on the fixing bracket, and a pivot shaft (120) passing through the first connecting seat (110) and the second connecting seat (130) in the vertical direction.
3. An elevator pit ladder climbing apparatus according to claim 2, characterized in that:
the first connecting seat (110) is received in an inner receiving space defined by the second connecting seat (130), and a length of the pivot shaft (120) in a vertical direction is greater than a length of the first connecting seat (110) in the vertical direction to allow the ladder stand (10) to move a predetermined distance in the vertical direction.
4. An elevator pit ladder climbing apparatus according to claim 3, characterized in that:
the elevator pit ladder device further comprises a locking means (41, 42) fixed on the bottom surface of the elevator pit, the locking means (41, 42) for holding the ladder (10) rotated to a predetermined position at the predetermined position to prevent the ladder (10) from rotating.
5. An elevator pit ladder climbing apparatus according to claim 4, characterized in that:
the elevator pit ladder apparatus includes a plurality of locking devices (41, 42), the plurality of locking devices (41, 42) being fixed at a plurality of different positions on the floor of the elevator pit for holding the ladder (10) at the plurality of different positions, respectively.
6. An elevator pit ladder climbing apparatus according to claim 5, characterized in that:
the ladder (10) is movable in a vertical direction from a locked position in engagement with the locking means (41, 42) to an unlocked position out of engagement with the locking means (41, 42) or from an unlocked position out of engagement with the locking means (41, 42) to a locked position in engagement with the locking means (41, 42).
7. An elevator pit ladder climbing apparatus according to claim 6, characterized in that:
the ladder (10) comprises a first longitudinal bar (11) and a second longitudinal bar (12) opposite to each other, and a plurality of transverse bars (13) connected between the first longitudinal bar (11) and the second longitudinal bar (12), the plurality of transverse bars (13) being evenly spaced apart in the longitudinal direction of the ladder (10).
8. An elevator pit ladder climbing apparatus according to claim 7, characterized in that:
the first longitudinal bar (11) of the ladder (10) is rotatably connected to the fixed support via the hinge (100), and the lower end of the second longitudinal bar (12) of the ladder (10) is adapted to be engaged in the locking means (41, 42) to restrict the ladder (10) from rotating.
9. The elevator pit ladder apparatus of claim 8, wherein:
the locking means (41, 42) has a retaining groove which mates with the lower end of the second longitudinal bar (12) of the ladder (10), the lower end of the second longitudinal bar (12) of the ladder (10) being adapted to be inserted into the retaining groove of the locking means (41, 42) to thereby restrict rotation of the ladder (10).
10. The elevator pit ladder apparatus of claim 9, wherein:
the elevator pit ladder arrangement comprises two locking means (41, 42), the two locking means (41, 42) being arranged to hold the ladder (10) in a first position and a second position, respectively.
11. An elevator pit ladder climbing apparatus according to claim 10, characterized in that:
when the ladder (10) is rotated about the pivot axis (120) from the first position to the second position, the angle of rotation of the ladder (10) about the pivot axis (120) is equal to 90 degrees.
12. The elevator pit ladder apparatus of claim 8, wherein:
the switch trigger piece (210) comprises a main body part (211) sleeved on the first longitudinal rod (11) of the ladder (10), a supporting part (213) supported on the switch mounting rack (220) and a trigger part (212) used for triggering the safety switch (200);
the main body portion (211) of the switch activating member (210) is free to move in a vertical direction relative to the first longitudinal bar (11) of the ladder (10) but is not rotatable relative to the first longitudinal bar (11) of the ladder (10) such that the switch activating member (210) rotates only with the ladder (10) and does not move vertically with the ladder (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/131445 WO2021129284A1 (en) | 2019-12-25 | 2020-11-25 | Ladder device for elevator pit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019223642862 | 2019-12-25 | ||
| CN201922364286 | 2019-12-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112027840A CN112027840A (en) | 2020-12-04 |
| CN112027840B true CN112027840B (en) | 2021-09-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010918893.3A Active CN112027840B (en) | 2019-12-25 | 2020-09-04 | Elevator pit ladder stand device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112027840B (en) |
| WO (1) | WO2021129284A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005194077A (en) * | 2004-01-09 | 2005-07-21 | Mitsubishi Electric Corp | Pit ladder of elevator |
| JP2013220913A (en) * | 2012-04-18 | 2013-10-28 | Mitsubishi Electric Corp | Elevator device |
| CN104818943A (en) * | 2015-04-29 | 2015-08-05 | 江南嘉捷电梯股份有限公司 | Elevator pit ladder |
| CN110159181A (en) * | 2019-06-28 | 2019-08-23 | 迅达（中国）电梯有限公司 | Elevator pit ladder mounting device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010064869A (en) * | 2008-09-11 | 2010-03-25 | Toshiba Elevator Co Ltd | Pit ladder device |
| CN202788597U (en) * | 2012-08-24 | 2013-03-13 | 巨人通力电梯有限公司 | Cat ladder device for going in/out lift pit |
| CN204646079U (en) * | 2015-04-29 | 2015-09-16 | 江南嘉捷电梯股份有限公司 | A kind of elevator pit cat ladder |
| CN205114744U (en) * | 2015-07-14 | 2016-03-30 | 贵州中航电梯有限公司 | Elevator pit ponding is automatic to draw water and device of emergency control |
| CN205739846U (en) * | 2016-07-15 | 2016-11-30 | 怡达快速电梯有限公司 | elevator pit maintenance assembly |
| CN110494382B (en) * | 2017-03-30 | 2021-03-09 | 三菱电机株式会社 | Pit ladder device for elevator |
| KR101982474B1 (en) * | 2018-02-28 | 2019-08-28 | 주식회사 지에스이엘리베이터 | a ladder of wire lope |
| CN210530727U (en) * | 2019-06-28 | 2020-05-15 | 迅达（中国）电梯有限公司 | Elevator pit ladder mounting device |
-
2020
- 2020-09-04 CN CN202010918893.3A patent/CN112027840B/en active Active
- 2020-11-25 WO PCT/CN2020/131445 patent/WO2021129284A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005194077A (en) * | 2004-01-09 | 2005-07-21 | Mitsubishi Electric Corp | Pit ladder of elevator |
| JP2013220913A (en) * | 2012-04-18 | 2013-10-28 | Mitsubishi Electric Corp | Elevator device |
| CN104818943A (en) * | 2015-04-29 | 2015-08-05 | 江南嘉捷电梯股份有限公司 | Elevator pit ladder |
| CN110159181A (en) * | 2019-06-28 | 2019-08-23 | 迅达（中国）电梯有限公司 | Elevator pit ladder mounting device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021129284A1 (en) | 2021-07-01 |
| CN112027840A (en) | 2020-12-04 |
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