CN110719882A - Pit ladder device of elevator - Google Patents
Pit ladder device of elevator Download PDFInfo
- Publication number
- CN110719882A CN110719882A CN201780091710.1A CN201780091710A CN110719882A CN 110719882 A CN110719882 A CN 110719882A CN 201780091710 A CN201780091710 A CN 201780091710A CN 110719882 A CN110719882 A CN 110719882A
- Authority
- CN
- China
- Prior art keywords
- pit
- pit ladder
- arm member
- elevator
- ladder
- Prior art date
- 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.)
- Granted
Links
Images
Classifications
-
- 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
Landscapes
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The invention provides a pit ladder device of an elevator, which is arranged in a pit of a lifting passage of the elevator and improves the arrangement performance. In order to achieve the above object, there is provided an elevator pit ladder device provided in a pit of a hoistway of an elevator for an operator to get on and off, the elevator pit ladder device including: a bracket, one end side of which is mounted on the pit wall; a first arm member having one end rotatably attached to the other end of the bracket; a second arm member having one end rotatably attached to the other end of the first arm member; and a pit ladder mounted to the second arm member.
Description
Technical Field
The present invention relates to a pit ladder apparatus provided in a pit of a hoistway of an elevator.
Background
A space (space) in which a hole is bored in a floor of a lowermost floor called a pit is provided in a hoistway of an elevator. The pit is internally provided with machines required by elevators, such as a buffer, a limit switch and the like. When performing maintenance work such as inspection and repair, it is necessary to open the hall door of the lowermost elevator hall and allow an operator to move down from the opened entrance/exit of the hall to the pit at the lowermost part of the hoistway. After the completion of the work, it is necessary to go from the lowest pit to the entrance/exit of the elevator hall. Therefore, a pit ladder is provided in advance in the pit.
When performing maintenance work, an operator opens the landing door, and then pulls a pit ladder stored in an inner side surface substantially perpendicular to the front surface of the entrance/exit of the landing room to the landing door opening port using a hook bar, and fixes the ladder to the landing door sill. The pit ladder is attached to one end side of the bracket in proximity to the bracket. The other end side of the bracket is provided with a hinge which is installed at the entrance side of the elevator hall. The bracket rotates by taking the hinge as an axis, so that the pit ladder moves to the doorsill of the elevator taking hall. Then, the operator moves down to the lowermost portion by the drawn-up pit ladder to perform maintenance work. After the maintenance work is finished, the operator moves up to the elevator hall at the lowest floor by using the pit ladder, and moves the pit ladder to the storage position and fixes the pit ladder by using the hanging rod. The storage position of the pit ladder is set at a position not interfering with the lifting operation of the elevator car. Then, the opened hall door is closed, and the operation of the elevator is resumed. Such a prior art is disclosed in, for example, patent document 1 (japanese patent application laid-open No. 2007-62862).
Prior art documents
Patent document
Patent document 1: japanese patent laid-open publication No. 2007-62862
Disclosure of Invention
Problems to be solved by the invention
In the structure described in patent document 1, since the bracket is rotated by the hinge attached to the entrance of the elevator hall, the position of the pit ladder is defined by the length of the bracket. A guide rail for guiding the car to ascend and descend is generally attached to an inner side surface substantially perpendicular to a front surface on which an entrance of the elevator hall is provided. Since it is necessary to prevent the pit ladder from interfering with the car, it is also necessary to prevent the pit ladder from interfering with the guide rail. Therefore, the length of the bracket depends on the installation position of the guide rail, i.e., the depth from the entrance/exit of the elevator hall to the guide rail. Therefore, in the case of an elevator shaft having a large width and a small depth from the entrance/exit of the elevator hall, the structure described in patent document 1 cannot sufficiently secure the length of the carriage, and when the carriage is rotated to the entrance/exit of the elevator hall, the pit ladder cannot sufficiently reach the entrance/exit of the elevator hall, which prevents the operator from performing maintenance work.
Further, when the pit ladder attached to the bracket is pulled close to the entrance of the hoistway door, if there is a projection and recess in the lowermost part of the pit, the lower end of the pit ladder comes into contact with the projection and recess, and it is difficult to pull the pit ladder close.
An object of the present invention is to provide a pit ladder device for an elevator, which solves the above problems and improves installation performance.
In addition, the present invention has an object to provide a pit ladder device for an elevator, which can easily pull out a pit ladder.
Means for solving the problems
A pit ladder device for an elevator, which is provided in a pit of a hoistway of the elevator and is used for an operator to get on and off, the pit ladder device for the elevator comprising: a bracket, one end side of which is mounted on the pit wall; a first arm member having one end rotatably attached to the other end of the bracket; a second arm member having one end rotatably attached to the other end of the first arm member; and a pit ladder mounted to the second arm member.
In addition, the present invention is characterized in that the second arm member is provided with a biasing mechanism for biasing the pit ladder upward.
Effects of the invention
According to the present invention, a pit ladder device for an elevator having improved installation performance can be provided.
Further, according to the present invention, it is possible to provide a pit ladder device for an elevator, which can easily pull out a pit ladder.
Drawings
Fig. 1 is an external perspective view of a pit ladder apparatus housed in a pit according to an embodiment of the present invention.
FIG. 2 is a side view of a pit ladder apparatus housed within a pit, in accordance with an embodiment of the present invention.
Fig. 3A is an enlarged view of a portion a of fig. 2.
Fig. 3B is an enlarged view of a portion a of fig. 2.
Fig. 4A is an explanatory view of the operation of the pit ladder apparatus in the stored state.
Fig. 4B is an explanatory view of the operation of the pit ladder apparatus in a pulled-out state.
Fig. 4C is an explanatory view showing an operation of the pit ladder assembly in a state engaged with the landing threshold.
Fig. 5 is an external perspective view showing a state in which the pit ladder assembly is engaged with the landing threshold.
Fig. 6 is a front view showing a state in which the pit ladder assembly is engaged with the landing threshold.
Fig. 7A is an operation explanatory diagram showing a process in which the engagement mechanism engages with the hall sill.
Fig. 7B is an explanatory diagram showing an operation state of the engagement mechanism and the hall sill.
Fig. 8 is a schematic diagram of an elevator system including a pit ladder device of an elevator according to an embodiment of the present invention.
Detailed Description
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Example 1
Fig. 8 is a schematic diagram of an elevator system including a pit ladder device of an elevator according to an embodiment of the present invention.
A pit 82 is provided below a hoistway 81 provided in a building. A machine chamber 83 is provided above the elevation path 81. An entrance 86 for passengers to enter and exit the car 85 is formed in each hall of each floor of the wall 84 forming the hoistway 81. A hall sill 87 protruding into the hoistway is formed at the lower portion of the doorway 86. The hall sill 87 blocks a gap between the car 85 and the doorway 86, and ensures safety when passengers get in and out of the car 65.
A hoist 88 is provided in the machine room 83, a rope 90 is suspended on a sheave 89 of the hoist 88, and a car 85 and a counterweight 91 are attached to both ends of the rope 90. The control panel 92 controls the hoist 88 to stop the car 85 at a predetermined floor.
The pit ladder apparatus 10 of the present embodiment is provided on a pit wall 93 of the pit 82. The pit ladder 10 is housed in an inner side surface substantially perpendicular to a front surface on which the doorway 86 is provided. The pit ladder apparatus 10 is housed in the wall 84 and is located at a position not interfering with the up-and-down movement of the car 85. In addition, a safety switch 33 is provided, and the safety switch 33 forcibly stops the ascending and descending of the car 85 when the pit ladder apparatus 10 is used. The safety switch 33 is connected to a control panel 92 via a signal line 34, and controls the hoist 88.
Next, a description will be given of a structure of a pit ladder apparatus of an elevator according to an embodiment of the present invention. Fig. 1 is an external perspective view of a pit ladder apparatus stored in a pit according to an embodiment of the present invention, fig. 2 is a side view of the pit ladder apparatus stored in the pit according to the embodiment of the present invention, and fig. 3A and 3B are enlarged views of a portion a of fig. 2.
In fig. 1, one end sides of two brackets 11 arranged vertically are fixed by bolts to a bottom pit wall 93 on an inner side surface substantially perpendicular to a front surface on which the doorway 86 is provided. One end side of the first arm member 12 is attached to the other end side upper portion of the bracket 11. The other end side of the bracket 11 extends toward the inside of the pit 82. The bracket 11 and the first arm member 12 are pivotally supported by a rotating shaft 13 so as to be rotatable. A second arm member 14 is attached to the other end side upper portion of the first arm member 12. The first arm member 12 and the second arm member 14 are rotatably supported by a rotating shaft 15.
Two projections 14a, 14b are formed on the second arm member 14, and a pit ladder 16 is provided between the projections 14a, 14 b. The protruding portions 14a, 14b are formed to protrude from the pit wall 93 into the pit 82. An angle 17 formed in an L shape is attached to the pit ladder 16 at four positions, i.e., the upper, lower, left, and right positions.
The lower surface of the angle 17 protruding from the pit ladder 16 faces the upper surfaces of the protruding portions 14a, 14b, and the angle 17 and the protruding portions 14a, 14b (second arm members 14) are coupled by bolts 18. A helical compression spring 19 as an urging mechanism is provided between the angle 17 and the protruding portions 14a and 14b (second arm member 14) connected by the bolt 18. The compression spring 19 is disposed along the outer periphery of the bolt 18, and is biased upward when viewed from the protruding portions 14a and 14b (second arm member 14). By the biasing force of the compression spring 19, the angle 17 moves upward away from the protruding portions 14a and 14b (second arm member 14), and the pit ladder 16 to which the angle 17 is attached also moves upward. Therefore, the lower end of the pit ladder 16 is in a state of floating from the lowermost portion of the pit 82 (fig. 1 and 2).
In fig. 3A and 3B, an engagement mechanism 20 is provided on the upper surface of the second arm member 14. The engagement mechanism 20 is coupled to the second arm member 14 by a bolt 21. A helical compression spring 22 as an urging means is provided between the head of the bolt 21 and the upper surface of the engagement mechanism 20. The compression spring 22 is disposed along the outer periphery of the bolt 21 and is biased downward when viewed from the head of the bolt 21. That is, the engaging mechanism 20 is pressed against the second arm member 14 by the urging force of the compression spring 22.
The pit ladder fixing member 30 is provided on the pit wall 93. The lower end of the pit ladder fixing unit 30 is attached to the pit wall 93 by a bolt 31, and a portion above the attached portion is spaced apart from the pit wall 93 to form a space. Further, the pit ladder fixing member 30 is formed with a horizontally long opening 32. The distal end of the engagement mechanism 20 is inserted into the opening 32. The front end portion of the engagement mechanism 20 is formed to be bent downward, and in a state where the front end portion of the engagement mechanism 20 is inserted into the opening portion 32, the front end portion of the engagement mechanism 20 is engaged with the pit ladder fixing member 30, and the pit ladder 16 is fixed to the pit wall 93 (fig. 3A).
Further, a safety switch 33 is attached to the pit ladder fixing member 30, and a switch portion 33a of the safety switch 33 is pressed downward in a state where the tip portion of the engagement mechanism 20 is engaged with the pit ladder fixing member 30. The information from the safety switch 33 is transmitted to the control panel 92 via the signal line 34 shown in fig. 8, and the car 85 is allowed to ascend and descend.
In a state (fig. 3B) in which the distal end portion of the engagement mechanism 20 is engaged with the lower end of the opening portion 32 against the urging force of the compression spring 22 and in a state in which the distal end portion of the engagement mechanism 20 is away from the opening portion 32, the opening and closing portion 33a of the safety switch 33 is opened and moved upward, and the elevator car 85 is forcibly stopped from moving up and down to the control panel 92 via the signal line 34. In a state where the pit ladder 10 is not completely stored (a state where the distal end portion of the engagement mechanism 20 is engaged with the opening portion 32), since the car 85 does not operate, collision of the car 85 with the pit ladder 10 and safety of the operator can be ensured.
As shown in fig. 1, in the stowed state of the pit ladder 16 (the state in which the second arm member 14 is engaged with the pit ladder fixing member 30), the first arm member 12 is bent substantially 90 degrees with respect to the bracket 11, and the second arm member 14 is bent substantially 180 degrees with respect to the first arm member 12. That is, the first arm member 12 and the second arm member 14 are overlapped and folded. The front end of the engagement mechanism 20 is engaged with the pit ladder fixing member 30, and thus the storage state is maintained.
As shown in fig. 1, a storage/withdrawal sling 35 is provided between the pit ladder 10 and the doorway 86. Both ends of the storage/withdrawal string are fixed to the upper surface of the engaging mechanism 20 by a string stopper 36. One of the storage/withdrawal slings 35a extending from the sling stopper 36 is guided to a hole of a sling holding portion 87a provided below the hall sill 87. The other storage/withdrawal sling 35b extending from the sling stopper 36 is passed through a hole of a sling holding portion 30a provided in the upper portion of the pit ladder mount 30, and guided to a hole of a sling holding portion 87a provided below the hall sill 87. The storage/ withdrawal slings 35a and 35b are connected.
Next, a method of pulling out the pit ladder 10 using fig. 4A, 4B, and 4C will be described. Fig. 4A is an explanatory operation diagram showing a state in which the pit ladder apparatus is stored, fig. 4B is an explanatory operation diagram showing a state in which the pit ladder apparatus is pulled out, and fig. 4C is an explanatory operation diagram showing a state in which the pit ladder apparatus is engaged with the landing threshold.
First, the operator operates the control panel 92 (fig. 8) to stop the car 85 at a position above one floor. After the car 85 stops, the hall doors are manually opened from the elevator hall at one floor using the unlocking key. The operator takes up the storage/pullout slings 35 hung below the hall sills 87, and pulls the storage/pullout slings 35 to draw the pit ladder 10 close to the hall sills 87. At this time, first, the storage/pullout slings 35a are gripped, and the storage/pullout slings 35a are pulled toward the hall sills 87. Thus, the rope stopper 36 is pulled, and the tip end portion of the engagement mechanism 20 is lifted against the urging force of the compression spring 22 that urges the engagement mechanism 20 downward, and the engagement state with the pit ladder fixing piece 30 is released, and the tip end portion of the engagement mechanism 20 is disengaged from the opening portion 32 (fig. 3B). The switch portion 33a of the safety switch 33 pressed by the engagement mechanism 20 is turned on and transmitted to the control panel 92 via the signal line 34 shown in fig. 8, thereby preventing the car 85 from ascending and descending. Thus, the car 85 does not operate during the use of the pit ladder 10, that is, during maintenance work by the operator, and the safety of the operator can be ensured.
When the storage/withdrawal string 35a is continuously pulled, the first arm member 12 rotates counterclockwise as viewed from above about the rotation shaft 13, and the second arm member 14 rotates clockwise as viewed from above about the rotation shaft 15 (fig. 4B). When the storage/withdrawal suspension wire 35a is continuously pulled, the first arm member 12 and the second arm member 14 are aligned substantially linearly, and the engagement mechanism 20 is positioned on the hall sill 87.
The engagement state between the engagement mechanism 20 and the hall sill 87 will be described with reference to fig. 5, 6, 7A, and 7B. Fig. 5 is an external perspective view showing a state in which the pit ladder apparatus is engaged with the landing threshold, fig. 6 is a front view showing a state in which the pit ladder apparatus is engaged with the landing threshold, fig. 7A is an operation explanatory view showing a process in which the engagement mechanism is engaged with the landing threshold, and fig. 7B is an operation explanatory view showing an engagement state of the engagement mechanism with the landing threshold.
When the engagement mechanism 20 is positioned on the hall sill 87, the front end of the engagement mechanism 20 contacts the hall sill 87, and then the front end of the engagement mechanism 20 is lifted against the biasing force of the compression spring 22 and rides on the hall sill 87 (fig. 7A). A groove 87B is formed in the hall sill 87, and the tip end portion of the engagement mechanism 20 that is caught by the hall sill 87 is dropped and fitted into the groove 87B (fig. 7B). This fixes the operation of the pit ladder 10, and enables the operator to perform work safely.
Further, when the pit ladder apparatus 10 is pulled out, the lower end portion of the pit ladder 16 is in a state of floating from the lowermost portion of the pit 82 due to the urging force of the compression spring 19, and therefore even if there is a recess or projection in the lowermost portion of the pit, the lower end portion of the pit ladder 16 does not come into contact with the recess or projection, and therefore the pit ladder apparatus 10 can be easily pulled out.
As shown in fig. 6, when the lower end portion of the pit ladder 16 is in a state of floating from the lowermost portion of the pit 82 in a state where the tip end portion of the engagement mechanism 20 is engaged with the groove 87b, the operator may become unstable when using the pit ladder 16. Therefore, in the present embodiment, when the operator uses the pit ladder 16, the lower end portion of the pit ladder 16 is configured to contact the lowermost portion of the pit 82. When the operator steps on the pit ladder 16 and applies a weight, the compression spring 19 contracts against the urging force of the compression spring 19 due to the weight of the operator, the pit ladder 16 descends, and the lower end portion of the pit ladder 16 comes into contact with the lowermost portion of the pit 82. This enables the operator to stably raise and lower the pit ladder 16.
Next, the maintenance work is finished, and the operation of storing the pit ladder 10 will be described. In the state shown in fig. 5, the operator picks up the storage/extension slings 35 placed on the doorsills 87 of the boarding hall, pulls the storage/extension slings 35, and stores the pit ladder apparatus 10 in the pit ladder fixing members 30. At this time, first, the storage/pullout slings 35b are gripped, and the storage/pullout slings 35a are pulled toward the hall sills 87. In this way, the rope stopper 36 is pulled, the front end portion of the engagement mechanism 20 is lifted against the urging force of the compression spring 22 that urges the engagement mechanism 20 downward, the engagement state with the groove 87b of the hall sill 87 is released, and the front end portion of the engagement mechanism 20 is caught on the hall sill 87 (fig. 7A).
When the storage/withdrawal string 35B is continuously pulled, the first arm member 12 rotates clockwise from above about the rotation shaft 13, and the second arm member 14 rotates counterclockwise from above about the rotation shaft 15 (fig. 4B). When the storage/withdrawal string 35a is continuously pulled, the first arm member 12 and the second arm member 14 are overlapped so as to be folded, and the tip end portion of the engagement mechanism 20 faces the pit ladder fixing unit 30.
When the storage/withdrawal string 35b is further pulled, the string stopper 36 provided in the engagement mechanism 20 is pulled, and the tip end portion of the engagement mechanism 20 is lifted and inserted into the opening 32 against the urging force of the compression spring 22 that urges the engagement mechanism 20 downward, and the tip end portion of the engagement mechanism 20 is engaged with and fixed to the pit ladder fixing member 30. Since the switch portion 33a of the safety switch 33 is pressed downward in a state where the distal end portion of the engagement mechanism 20 is engaged with the pit ladder fixing member 30, information from the safety switch 33 is transmitted to the control panel 92 via the signal line 34 shown in fig. 8, and the car 85 is allowed to ascend and descend.
As described above, according to the present embodiment, in the pit ladder apparatus 10 provided on the inner side surface (side surface as viewed from the doorway 86) of the pit substantially at right angles to the front surface on which the doorway 86 is provided, the first arm member 12 connected to the bracket 11 and the second arm member 14 provided with the pit ladder 16 connected to the first arm member 12 are provided and are each provided so as to be rotatable, so that the first arm member 12 and the second arm member 14 can be folded and stored so as to overlap each other when the pit ladder apparatus 10 is stored, and the depth dimension of the pit ladder apparatus 10 can be reduced. Further, since the first arm member 12 and the second arm member 14 can be extended substantially linearly when the pit ladder apparatus 10 is pulled out, the pit ladder 16 can be sufficiently moved to the doorway 86 even in the pit 82 configured such that the distance between the doorway 86 and the side surface of the doorway 86 is separated. Thus, the pit ladder device of the elevator with improved installation performance can be provided.
Further, according to the present embodiment, since the second arm member 14 is provided with the compression spring 19 as the biasing means for biasing the pit ladder 16 upward and the lower end portion of the pit ladder 16 is raised from the lowermost pit portion, even if there is a recess or projection in the lowermost pit portion during the operation of pulling out the pit ladder 16 or during the operation of storing the pit ladder, the lower end portion of the pit ladder 16 does not come into contact with the recess or projection, and the pit ladder 16 can be easily moved.
Further, according to the present embodiment, since the safety switch 33 for allowing the car 85 to ascend and descend is provided and the engagement mechanism 20 presses the safety switch 33 to allow the car 85 to ascend and descend in the state where the pit ladder 16 is stored, the car 85 does not operate in the state where the pit ladder 10 is not completely stored (the state where the distal end portion of the engagement mechanism 20 is engaged with the opening portion 32), and collision of the car 85 with the pit ladder 10 and safety of the operator can be ensured.
Further, according to the present embodiment, since the storage/pullout slings 35 are passed through the slings holding portions 30a, 87a provided in the pit ladder fixing member 30 and the hall sill 87 attached to the pit wall 93, respectively, and both ends of the storage/pullout slings 35 are fixed by the slings stopper 36 provided in the engaging mechanism 20, the storage/pullout slings 35 can be pulled through the doorway 86, thereby facilitating storage and pullout of the pit ladder apparatus 10.
The present invention is not limited to the above-described embodiments, and includes various modifications. The above-described embodiments are described in detail to facilitate explanation of the present invention, and are not necessarily limited to having all of the structures described.
Description of reference numerals:
the elevator comprises a 10-pit ladder device, 11 brackets, 12 first arm members, 13 rotating shafts, 14 second arm members, 14a and 14b protruding parts, 15 rotating shafts, 16-pit ladders, 17-angle iron, 18, 21 and 31 bolts, 19 and 22 compression springs, 20 clamping mechanisms, 30-pit ladder fixing parts, 30a and 87a sling holding parts, 32 opening parts, 33 safety switches, 33a switching parts, 34 signal lines, 35a and 35b accommodating and pulling slings, 36 sling stopping parts, 81 lifting channels, 82 pits, 83 machine rooms, 84 walls, 85 cars, 86 entrances and exits, 87 elevator boarding hall doorsills, 88 winches, 89 rope wheels, 90 slings, 91 counterweights, 92 control panels and 93 pit walls.
Claims (10)
1. A pit ladder device of an elevator, which is provided on the inner side surface of a pit at a right angle to the front surface of an entrance of the elevator for an operator to get on and off,
it is characterized in that the preparation method is characterized in that,
the pit ladder device of the elevator is provided with:
a bracket, one end of which is mounted on the pit wall of the inner side surface of the pit;
a first arm member having one end rotatably attached to the other end of the bracket;
a second arm member having one end rotatably attached to the other end of the first arm member; and
a pit ladder mounted to the second arm member.
2. A pit ladder apparatus of an elevator according to claim 1,
the second arm member is provided with a biasing mechanism for biasing the pit ladder upward.
3. A pit ladder apparatus of an elevator according to claim 2,
two protruding portions are provided on the second arm member, the pit ladder is provided between the two protruding portions, and the urging mechanisms are provided on the two protruding portions, respectively.
4. A pit ladder apparatus of an elevator according to any one of claims 1 to 3,
pit ladder fixtures are arranged on the walls in the pit,
the second arm member is provided with an engagement mechanism that engages with the pit ladder fixing member.
5. A pit ladder apparatus of an elevator according to claim 4,
the pit ladder fixing piece is provided with a safety switch, and a switch part of the safety switch is pressed in a state that the pit ladder fixing piece is clamped with the clamping mechanism.
6. A pit ladder apparatus of an elevator according to claim 4,
the elevator taking hall doorsill for shielding the clearance between the elevator car and the access opening is arranged, the elevator taking hall doorsill and the pit ladder fixing piece are respectively provided with a sling holding part, a storage pull-out sling passes through the sling holding part, and two end parts of the storage pull-out sling are fixed by a sling stopper arranged on the clamping mechanism.
7. A pit ladder apparatus of an elevator according to claim 6,
the engagement mechanism is located on the hall sill in a state where the first arm member and the second arm member are substantially linearly arranged, and a groove that engages with the engagement mechanism is provided on the hall sill.
8. A pit ladder device of an elevator, which is provided on the inner side surface of a pit at a right angle to the front surface of an entrance of the elevator for an operator to get on and off,
it is characterized in that the preparation method is characterized in that,
the pit ladder device of the elevator is provided with:
a bracket, one end of which is mounted on the pit wall of the inner side surface of the pit;
a first arm member having one end rotatably attached to the other end of the bracket;
a second arm member having one end rotatably attached to the other end of the first arm member;
a pit ladder mounted to the second arm member;
a pit ladder mount mounted to the pit wall; and
an engaging mechanism provided on the second arm member and engaged with the pit ladder fixing member,
the first arm member is bent substantially 90 degrees with respect to the bracket and the second arm member is bent substantially 180 degrees with respect to the other end of the first arm member in a state where the second arm member is engaged with the pit ladder fixing piece.
9. A pit ladder apparatus of an elevator according to claim 8,
the pit ladder is provided with an L-shaped angle iron, a lower surface of the angle iron is arranged to face an upper surface of the second arm member, a bolt for connecting the angle iron and the second arm member is arranged, and an urging mechanism is arranged on the periphery of the bolt and urges the pit ladder upward so that a lower end portion of the pit ladder floats from the lowest portion of the pit.
10. A pit ladder apparatus of an elevator according to claim 8 or 9,
the pit ladder fixing member is provided with a safety switch which transmits a signal for allowing the ascending and descending operation of the car to a control panel of the elevator in a state where the pit ladder fixing member is engaged with the engagement mechanism, and transmits a signal for forcibly stopping the ascending and descending operation of the car to the control panel of the elevator in a state where the engagement between the pit ladder fixing member and the engagement mechanism is released.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/021986 WO2018229905A1 (en) | 2017-06-14 | 2017-06-14 | Elevator pit ladder device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110719882A true CN110719882A (en) | 2020-01-21 |
| CN110719882B CN110719882B (en) | 2021-07-16 |
Family
ID=64659177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780091710.1A Active CN110719882B (en) | 2017-06-14 | 2017-06-14 | Pit ladder device of elevator |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3640183A4 (en) |
| JP (1) | JP6720411B2 (en) |
| CN (1) | CN110719882B (en) |
| WO (1) | WO2018229905A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115315403A (en) * | 2020-03-26 | 2022-11-08 | 三菱电机株式会社 | Pit ladder device of elevator |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159181A (en) * | 2019-06-28 | 2019-08-23 | 迅达（中国）电梯有限公司 | Elevator pit ladder mounting device |
| JP7372947B2 (en) * | 2021-01-18 | 2023-11-01 | 株式会社日立ビルシステム | Elevator work safety device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2132290T3 (en) * | 1994-02-07 | 1999-08-16 | Daifuku Kk | INPUT / OUTPUT HANDLING DEVICE FOR AN AUTOMATED WAREHOUSE. |
| WO2003029599A1 (en) * | 2001-10-01 | 2003-04-10 | Philippus Johannes Kattouw | Ladder |
| JP2005067883A (en) * | 2003-08-27 | 2005-03-17 | Toshiba Elevator Co Ltd | Pit ladder |
| CN102493760A (en) * | 2011-11-21 | 2012-06-13 | 日立电梯（中国）有限公司 | Pull-up ladder stand |
| CN205675929U (en) * | 2016-06-15 | 2016-11-09 | 杭州保利电梯导轨制造有限公司 | A kind of protecting device of lift well |
| CN106193998A (en) * | 2016-06-29 | 2016-12-07 | 日立电梯（中国）有限公司 | Pull-type cat ladder |
| CN106829663A (en) * | 2015-12-03 | 2017-06-13 | 株式会社日立大厦系统 | Elevator |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007062862A (en) * | 2005-08-29 | 2007-03-15 | Toshiba Elevator Co Ltd | Pit ladder device |
| JP2009249105A (en) * | 2008-04-04 | 2009-10-29 | Mitsubishi Electric Building Techno Service Co Ltd | Ladder fixing device for elevator pit |
| JP6300656B2 (en) * | 2014-06-17 | 2018-03-28 | 三菱電機ビルテクノサービス株式会社 | Pit ladder equipment for elevators |
| JP5948400B2 (en) * | 2014-12-08 | 2016-07-06 | 東芝エレベータ株式会社 | Elevator pit ladder equipment |
-
2017
- 2017-06-14 CN CN201780091710.1A patent/CN110719882B/en active Active
- 2017-06-14 EP EP17914088.4A patent/EP3640183A4/en not_active Withdrawn
- 2017-06-14 WO PCT/JP2017/021986 patent/WO2018229905A1/en unknown
- 2017-06-14 JP JP2019524631A patent/JP6720411B2/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2132290T3 (en) * | 1994-02-07 | 1999-08-16 | Daifuku Kk | INPUT / OUTPUT HANDLING DEVICE FOR AN AUTOMATED WAREHOUSE. |
| WO2003029599A1 (en) * | 2001-10-01 | 2003-04-10 | Philippus Johannes Kattouw | Ladder |
| JP2005067883A (en) * | 2003-08-27 | 2005-03-17 | Toshiba Elevator Co Ltd | Pit ladder |
| CN102493760A (en) * | 2011-11-21 | 2012-06-13 | 日立电梯（中国）有限公司 | Pull-up ladder stand |
| CN106829663A (en) * | 2015-12-03 | 2017-06-13 | 株式会社日立大厦系统 | Elevator |
| CN205675929U (en) * | 2016-06-15 | 2016-11-09 | 杭州保利电梯导轨制造有限公司 | A kind of protecting device of lift well |
| CN106193998A (en) * | 2016-06-29 | 2016-12-07 | 日立电梯（中国）有限公司 | Pull-type cat ladder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115315403A (en) * | 2020-03-26 | 2022-11-08 | 三菱电机株式会社 | Pit ladder device of elevator |
| CN115315403B (en) * | 2020-03-26 | 2024-06-04 | 三菱电机株式会社 | Pit ladder device of elevator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110719882B (en) | 2021-07-16 |
| WO2018229905A1 (en) | 2018-12-20 |
| JPWO2018229905A1 (en) | 2020-03-19 |
| JP6720411B2 (en) | 2020-07-08 |
| EP3640183A4 (en) | 2021-03-03 |
| EP3640183A1 (en) | 2020-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107074502B (en) | Elevator car door device | |
| US9656835B2 (en) | Elevator car door locking apparatus | |
| US6230845B1 (en) | Moveable control panel for elevators | |
| JP5755033B2 (en) | Door device and elevator device | |
| CN110719882B (en) | Pit ladder device of elevator | |
| KR20200050555A (en) | A Ladder Used In Elevator | |
| JP2008303003A (en) | Locking device for car side door of elevator | |
| JP6456519B2 (en) | Elevator landing door opening device | |
| JP6270940B1 (en) | Elevator equipment | |
| JP2014024629A (en) | Elevator device | |
| JP2016034873A (en) | Elevator device | |
| JP6058710B2 (en) | Elevator equipment | |
| JP2009190862A (en) | Elevator device | |
| CN112390118B (en) | Door device of elevator | |
| JP5730365B2 (en) | Elevator equipment | |
| JP2019123610A (en) | Elevator device | |
| JP6239038B1 (en) | Elevator equipment | |
| JP6321225B1 (en) | Elevator equipment | |
| JP6242949B1 (en) | Elevator equipment | |
| CN109850731B (en) | Elevator with a movable elevator car | |
| WO2024134726A1 (en) | Elevator device | |
| JP2727890B2 (en) | Small elevator equipment | |
| JP6026625B1 (en) | Elevator equipment | |
| JP2010143670A (en) | Elevator device | |
| JP5945020B1 (en) | Elevator equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |