CN115315403A - Pit ladder device of elevator - Google Patents
Pit ladder device of elevator Download PDFInfo
- Publication number
- CN115315403A CN115315403A CN202080098575.5A CN202080098575A CN115315403A CN 115315403 A CN115315403 A CN 115315403A CN 202080098575 A CN202080098575 A CN 202080098575A CN 115315403 A CN115315403 A CN 115315403A
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- China
- Prior art keywords
- ladder
- pit
- elevator
- hoistway
- lower ladder
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- 230000008878 coupling Effects 0.000 claims description 13
- 238000010168 coupling process Methods 0.000 claims description 13
- 238000005859 coupling reaction Methods 0.000 claims description 13
- 230000003028 elevating effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 5
- 230000001174 ascending effect Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
Abstract
A pit ladder device of an elevator, the elevator comprising: a lifting body which lifts and lowers within the hoistway; a guide rail which is provided in the hoistway and guides the lifting of the lifting body; and a pit ladder device provided in a hoistway, for raising and lowering an operator between a pit surface of the hoistway and a landing, the pit ladder device of an elevator comprising: a lower ladder, the lower end of which is fixed on the surface of the pit, the lower ladder is arranged at a height which does not collide when the lifting body moves to the lowest layer, and at least a part of the lower ladder is overlapped with the vertical projection surface of the lifting body; an upper ladder which is arranged above the lower ladder, is supported by the lower ladder, and at least part of which can move and can be connected with or separated from the lower ladder; a rotating mechanism which is arranged between the lower ladder and the upper ladder, supports the upper ladder and can move the upper ladder between a storage position which is not overlapped with the vertical projection plane of the lifting body and a use position which is connected with the lower ladder for use in the shaft; and an engaging portion which can connect or separate the lower ladder and the upper ladder at the using position.
Description
Technical Field
The present invention relates to a pit ladder device for an elevator, which is provided in a hoistway and is used for ascending and descending between a pit surface of the hoistway and a landing.
Background
As a pit ladder for an elevator, there has been proposed a pit ladder which is stored under a landing sill at the lowermost floor when not in use so as to avoid buffer interference with a car, and which is arranged at a position where the ladder can be lifted up by rotating the ladder when in use (for example, see patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2008-24409
Disclosure of Invention
Problems to be solved by the invention
When the operator ascends and descends on the pit ladder, a load in the vertical direction is mainly applied, and the load is supported by the lower end portion of the pit ladder. However, when the worker is in a stable posture when ascending and descending on the pit ladder, a load in the vertical direction mainly acts on the pit ladder, but the worker may sometimes take an unstable posture such as stepping on the foot, and in this case, a load may accidentally act on the pit ladder in the horizontal direction. Here, the apparatus of patent document 1 is provided with a stopper member for holding the lower end portion of the pit ladder. However, since the stopper member is not fixed to the pit surface, when a load in the horizontal direction is applied during use of the pit ladder, the stopper member may exceed the limit of the holding force of the stopper member, and the lower end portion of the pit ladder may move in an unexpected horizontal direction. Therefore, the pit ladder becomes unstable, and the operator has a problem of becoming unstable posture on the pit ladder.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a pit ladder apparatus which can be safely used even when an operator is in an unstable posture during use of the pit ladder without enlarging an installation space of the pit ladder.
Means for solving the problems
The pit ladder device of the elevator of the invention is a pit ladder device of the following elevator, the elevator is provided with: an elevating body that elevates within the hoistway; a guide rail which is provided in the hoistway and guides the lifting of the lifting body; and a pit ladder device provided in a hoistway, for raising and lowering an operator between a pit surface of the hoistway and a landing, the pit ladder device for an elevator comprising: a lower ladder, the lower end of which is fixed on the pit surface, the lower ladder is arranged at a height which does not generate collision when the lifting body moves to the lowest layer, and at least a part of the lower ladder is overlapped with the vertical projection plane of the lifting body; an upper ladder which is arranged above the lower ladder, is supported by the lower ladder, and at least part of which can move and can be connected with or separated from the lower ladder; a rotating mechanism which is arranged between the lower ladder and the upper ladder, supports the upper ladder and can move the upper ladder between a storage position which is not overlapped with the vertical projection plane of the lifting body and a using position which is connected with the lower ladder for use in the shaft; and an engaging portion which can connect or separate the lower ladder and the upper ladder at the using position.
Effects of the invention
The invention can realize a pit ladder device, which can not enlarge the setting space of the pit ladder, and can be safely used even if the operator becomes unstable posture in the process of using the pit ladder.
Drawings
Fig. 1 is a front view showing a pit ladder device (use position) of an elevator according to embodiment 1 of the present invention.
Fig. 2 is a plan view showing a pit ladder device (use position) of an elevator according to embodiment 1 of the present invention.
Fig. 3 is a perspective view showing a main part of a pit ladder apparatus (use position) of an elevator according to embodiment 1 of the present invention.
Fig. 4 is a front view showing a pit ladder device (storage position) of an elevator according to embodiment 1 of the present invention.
Fig. 5 is a plan view showing a pit ladder device (storage position) of an elevator according to embodiment 1 of the present invention.
Fig. 6 is a perspective view showing a main part of a pit ladder apparatus (storage position) of an elevator according to embodiment 1 of the present invention.
Fig. 7 is a perspective view (enlarged view) showing a connection portion of a pit ladder apparatus of an elevator according to embodiment 1 of the present invention.
Fig. 8 is a perspective view (enlarged view) showing a joint portion of a pit ladder device (use position) of an elevator according to embodiment 1 of the present invention.
Fig. 9 is a perspective view (enlarged view) showing a joint portion of a pit ladder device (storage position) of an elevator according to embodiment 1 of the present invention.
Fig. 10 is a perspective view showing a main part of a pit ladder device (use position) of an elevator according to embodiment 2 of the present invention.
Fig. 11 is a perspective view showing a main part of a pit ladder apparatus (storage position) of an elevator according to embodiment 2 of the present invention.
Detailed Description
Fig. 1 to 6 are views for explaining a pit ladder apparatus according to embodiment 1 of the present invention, fig. 1 is a front view showing a pit ladder apparatus (use position) of an elevator, fig. 2 is a plan view showing the pit ladder apparatus (use position), fig. 3 is a perspective view showing a main part of the pit ladder apparatus (use position), fig. 4 is a front view showing the pit ladder apparatus (storage position), fig. 5 is a plan view showing the pit ladder apparatus (storage position), and fig. 6 is a perspective view showing a main part of the pit ladder apparatus (storage position).
In the figure, a car (elevator) 2, a counterweight (not shown), and a landing doorway 3 are provided in a hoistway 1. The car 2 and the counterweight are suspended in the hoistway 1 by suspension means (not shown) and are lifted and lowered by a hoisting machine (not shown). As the suspension unit, a plurality of ropes or a plurality of belts are used. The hoisting machine (not shown) includes: a drive sheave (not shown) around which a suspension unit is wound; a motor (not shown) that rotates the drive sheave; and a brake (not shown) for braking rotation of the drive sheave. The landing doorway 3 is provided at each of the stopping floors of the car 2, and a landing door (not shown) is provided at the landing doorway 3.
The hoistway 1 includes a pair of car guide rails 4 for guiding the up-and-down movement of the car 2 and a pair of counterweight guide rails (not shown) for guiding the up-and-down movement of the counterweight. The car guide rails 4 are disposed on both sides in the width direction (the vertical direction in fig. 1) of the car 2.
Fig. 2 is a front view showing a state in which the pit ladder apparatus 5 of fig. 1 is used, fig. 3 is a perspective view showing a main part of the pit ladder apparatus 5 of fig. 2, and fig. 4 is a perspective view showing a state in which the pit ladder apparatus 5 of fig. 3 is not used.
The pit ladder apparatus 5 includes: a lower ladder 7 fixed to a pit surface 6 in the hoistway 1; and an upper ladder 8 provided above the lower ladder 7 and movable in the horizontal direction. The lower ladder 7 has a pair of pillars 7a, 7b, lower portions of the pair of pillars 7a, 7b are fixed to the pit floor 6, and a plurality of steps 9 are erected between the pair of pillars 7a, 7 b. The upper ladder 8 has a pair of support columns 8a and 8b, and a plurality of steps 9 are erected between the pair of support columns 8a and 8 b.
The lower ladder 7 is disposed such that the longitudinal direction of the step 9 is parallel to the landing doorway 3 when viewed from the vertical direction. Further, the lower end of the lower ladder 7 is anchored to the pit surface 6. The support column 7a of the lower ladder 7 is fixed to the wall side at a position not overlapping the vertical projection plane of the car 2 on the pit surface 6, and the support column 7b is fixed to the car 2 side at a position overlapping the vertical projection plane of the car 2 on the pit surface 6.
The upper ladder 8 is movable in the horizontal direction within the hoistway 1 between a storage position where the upper ladder 8 is disposed on the wall side at a position not overlapping the vertical projection plane of the car 2 and a use position where the upper ladder 8 is connected to the position directly above the lower ladder 7 when in use.
Fig. 7 is a perspective view (enlarged view) showing a turning mechanism of the pit ladder apparatus 5. A column 8a of the upper ladder 8 is disposed directly above the column 7a of the lower ladder 7. The support post 7a and the support post 8a are coupled to each other by a coupling portion 10 as a rotation mechanism. In the figure, a convex portion 11 and a concave portion 12 are provided in the coupling portion 10, wherein the convex portion 11 is formed in the upper end portion of the support post 7a in the vertical direction, and the concave portion 12 is formed in the lower end portion of the support post 8a in the vertical direction. The convex portion 11 is engaged with the concave portion 12 and is held rotatably relative to each other.
The guide rail 4 is provided with a mounting arm 13, and one of the mounting arms 13 is fixed and the other mounting arm 13 is disposed to extend in the lateral direction toward the landing doorway 3 side. The upper end of the support 8a is rotatably held by the mounting arm 13. The upper end of the support column 8a of the upper ladder 8 is held by the mounting arm 13, and the lower end of the support column 8a is supported by the support column 7a via the coupling portion 10, so that the support column 8b side can move in the horizontal direction with the support column 8a as a rotation axis.
Further, a torsion spring 14 is provided between the lower end of the strut 8a and the coupling portion 10. The torsion spring 14 is disposed inside the coupling portion 10, and has an upper end fixed to a side surface of the convex portion 11 and a lower end fixed to a lower end of the support 8a. Here, when the upper ladder 8 is horizontally moved from the storage position to the use position, the torsion spring 14 is twisted in a predetermined direction, and therefore the torsion spring 14 generates an elastic force in a direction to return to the original state. Accordingly, since the spring force of the torsion spring 14 acts on the upper ladder 8 via the support 8a, the upper ladder 8 moved to the use position automatically returns to the storage position when the hand is released.
Fig. 8 is a perspective view (enlarged view) showing a coupling portion of the pit ladder apparatus (use position), and fig. 9 is a perspective view (enlarged view) showing a coupling portion of the pit ladder apparatus (storage position). In the use position of the upper ladder 8, the support column 8b of the upper ladder 8 is disposed directly above the support column 7b of the lower ladder 7. In the figure, an engaging portion 15 that can be coupled to or separated from each other in the vertical direction is provided at an upper end portion of the support post 7b and a lower end portion of the support post 8 b. The engaging portion 15 is provided with a latch 16 and a striker 17, the latch 16 being formed at an upper end portion of the pillar 7b in the vertical direction, and the striker 17 being formed at a lower end portion of the pillar 8b in the vertical direction.
The latch 16 is vertically movable, and a spring 18 is provided inside the upper end of the support 7 b. The latch 16 is constantly biased upward by the spring 18, and is maintained in a state of protruding upward from the upper end of the support 7 b. Further, the plug 16 is provided with a handle 19, the handle 19 protrudes horizontally from the side surface and can be moved up and down, and when the handle 19 is moved up and down, the plug 16 can be moved up and down in synchronization with each other.
The plug 16 and the striker 17 can be engaged with each other, and the plug 16 and the striker 17 can be coupled to or separated from each other by performing a predetermined operation at the engagement portion 15. That is, in a state where the operator manually presses the handle 19 downward, the plug 16 and the striker 17 are aligned at the same position, and when the operator separates the hand from the plug 16, the plug 16 is automatically lifted to engage with the striker 17. When the engaging portion 15 is engaged to connect the support post 7b and the support post 8b, the load acting on the support post 8b is supported by the support post 7b via the engaging portion 15.
When the operator manually pushes the handle 19 downward with the engaging portion 15 engaged, the engagement between the latch 16 and the striker 17 is released. When either the plug 16 or the striker 17 is moved, the engagement of the engaging portion 15 is released.
The engaging portion 15 is disposed at a height that does not cause a collision when the car 2 moves to the lowermost floor and that can be reached by the hand of the operator when reaching from the landing doorway 3 in a crouched posture. That is, the engagement section 15 can be manually engaged with or disengaged from the landing doorway 3 by an operator when pit work is started or when work is completed.
Next, the operation of embodiment 1 configured as described above will be described. First, the operator inserts his or her hand into the hoistway 1 from the lowermost landing doorway 3, and manually moves the upper ladder 8 disposed in the storage position horizontally toward the use position.
The support post 8b is provided above the support post 7b fixed at the use position, and the support post 7b and the support post 8b are connected and fixed by connecting the bolt 16 and the striker 17 of the engaging portion 15. The operator performs a predetermined operation by moving up and down between the landing doorway 3 and the pit floor 6 using the coupled pit ladder apparatus 5.
After a predetermined operation is completed, the operator moves his or her body into the hoistway 1 through the lowermost landing doorway 3, and separates the pillar 7b from the pillar 8b by separating the bolt 16 and the striker 17 of the engagement portion 15 of the pit ladder apparatus 5 disposed at the use position. The operator manually moves the upper ladder 8 horizontally from the use position to the storage position. After the upper ladder 8 is disposed at the storage position, the work is finished.
As described above, according to embodiment 1, it is possible to provide a pit ladder apparatus 5 of an elevator including: a car 2 that ascends and descends in the hoistway 1; a guide rail 4 that is provided in the hoistway 1 and guides the lift of the car 2; and a pit ladder device 5 provided in the hoistway 1 for an operator to ascend and descend between the pit surface 6 of the hoistway 1 and the landing doorway 3, the pit ladder device 5 of the elevator comprising: a lower ladder 7, the lower end of which is fixed to the pit surface 6, the lower ladder 7 being disposed at a height at which no collision occurs when the car 2 moves to the lowermost floor, and at least a part of which overlaps a vertical projection plane of the car 2; an upper ladder 8 which is disposed above the lower ladder 7, is supported by the lower ladder 7, and is at least partially movable and connectable to and disconnectable from the lower ladder 7; a connection part 10 which is provided between the lower ladder 7 and the upper ladder 8, supports the upper ladder 8, and enables the upper ladder 8 to move between a storage position which is not overlapped with the vertical projection plane of the car 2 in the hoistway 1 and a use position which is connected with the lower ladder 7 for use; and an engaging portion 15 which can connect or separate the lower ladder 7 and the upper ladder 8 at the using position, thereby, the installation space of the pit ladder is not enlarged, even the operator becomes unstable posture during the using process, the operation can be safely used.
Further, a load acting on the upper ladder 8 in the horizontal direction can be transmitted from the upper ladder 8 to the lower ladder 7, and further, can be stably supported by the pit floor 6 via the lower ladder 7.
Further, since only the upper ladder 8 needs to be moved when preparation or work using the pit ladder apparatus 5 is completed, the work intensity of the worker can be reduced as compared with the case where the entire pit ladder apparatus 5 is moved. This makes it possible to safely prepare or finish the work of the pit ladder 5.
By arranging the engaging portion 15 at a height at which the car 2 does not collide when moving to the lowermost floor, it is possible to provide a safe pit ladder apparatus 5 in which the car 2 does not collide with the engaging portion 15 when the upper ladder 8 is in the storage position.
Further, since the pit ladder apparatus 5 is placed in a usable state or a state in which work is completed by disposing the engagement section 15 at a height that can be reached by the hand of the operator from the landing doorway 3, the upper ladder 8 can be moved from the storage position or the use position by manually operating the engagement section 15.
Further, the engaging portion 15 includes: a latch 16 which is constantly urged in the vertical direction by a spring 18; a handle 19 provided on the plug 16 and capable of moving the plug 16 up and down; and a striker 17 engaged with the plug 16, whereby the engaging portion 15 can be easily set to any one of the coupled state and the decoupled state only by vertically moving the handle 19. Further, when the pit ladder apparatus 5 is used, the engaged state of the engaging portion 15 can be easily maintained, and therefore the pit ladder apparatus 5 can be safely used.
Further, the lower ladder 7 and the upper ladder 8 have a pair of support columns 7a, 7b, 8a, 8b, a plurality of steps 9 are provided between the pair of support columns 7a, 7b, 8a, 8b, and a coupling portion 10 is provided between the support column 7a of the lower ladder 7 and the support column 8a of the upper ladder 8, and includes a convex portion 11 formed in the vertical direction and a concave portion 12 engageable with the convex portion 11, and the convex portion 11 and the concave portion 12 are engaged with each other and arranged to be rotatable with each other.
Further, the torsion spring 14 is provided in the connection portion 10, and the spring force of the torsion spring 14 acts in the direction of returning the upper ladder 8 from the use position to the storage position, so that even if the upper ladder 8 is moved to the use position and the connection operation by the engagement portion 15 is forgotten, the upper ladder 8 is automatically returned to the storage position. Therefore, the operator cannot use the pit ladder 5 without performing the coupling operation by the engaging portion 15. This enables the worker to safely use the pit ladder apparatus 5.
Further, by providing the mounting arms 13, and by fixing one of the mounting arms 13 to the guide rail 4 and holding the upper ladder 8 by the other, the pit ladder apparatus 5 can be disposed only by the elevator equipment (the guide rail 4) without depending on the body, the beam, and the like on the building side in the hoistway 1.
Fig. 10 to 11 are views for explaining a pit ladder apparatus according to embodiment 2 of the present invention, fig. 10 is a perspective view showing a main part of the pit ladder apparatus (use position), and fig. 11 is a perspective view showing a main part of the pit ladder apparatus (storage position). The pit ladder apparatus 20 according to embodiment 2 of the present invention is mainly different in that a hinge portion 24 is provided between the pillar 21a and the pillar 22a, the hinge portion 24 supports the upper ladder 22 as the connection portion 23, and the same portions other than those are denoted by the same reference numerals and the description thereof is omitted.
In the figure, the upper end of the pillar 21a of the lower ladder 21 is extended to a level slightly higher than the upper end of the pillar 22a of the upper ladder 22, and is fixed to the mounting arm 13. That is, the column 21a is at a height slightly higher than the height obtained by adding the height of the column 21b of the lower ladder 21 to the height of the column 22b of the upper ladder 22.
A hinge portion 24 is provided at an upper portion of the pillar 21a, and the hinge portion 24 connects the pillars 22a and rotatably holds the upper ladder 22 with the pillar 21a as a rotation axis. The pillar 22a is disposed at a position separated from the pillar 21a toward the pillar 21b by the length of the hinge portion 24 in the horizontal direction.
Next, the operation of embodiment 2 configured as described above will be described with reference to fig. 5 to 6. First, the operator inserts his or her hand into the hoistway 1 from the lowermost landing doorway 3, and manually moves the upper ladder 22 disposed in the storage position horizontally toward the use position. Here, when the upper ladder 22 is moved horizontally, the support column 21a itself does not rotate, but the upper ladder 22 is rotated by the rotation of the hinge portion 24.
The support post 22b is provided above the support post 21b fixed in the use position, and the support post 21b and the support post 22b are connected and fixed by connecting the plug 16 of the engaging portion 15 and the striker 17. The operator performs a predetermined operation by moving up and down between the landing doorway 3 and the pit floor 6 using the coupled and fixed pit ladder apparatus 20.
After a predetermined operation is completed, the operator inserts his or her hand into the hoistway 1 from the lowermost landing doorway 3, and separates the pillar 21b from the pillar 22b by operating the bolt 16 and the striker 17 of the engagement portion 15 of the pit ladder apparatus 20 disposed at the use position to separate them. The worker manually moves the upper ladder 22 horizontally from the use position to the storage position. After the upper ladder 22 is disposed at the storage position, the operation is ended.
As described above, according to embodiment 2, the lower ladder 21 and the upper ladder 22 have the pair of pillars 21a, 21b, 22a, 22b, the plurality of steps 9 are provided in the middle of the pair of pillars 21a, 21b, 22a, 22b, the coupling portion 23 includes the hinge portion 24, the hinge portion 24 is disposed between the pillar 21a of the lower ladder 21 and the pillar 22a of the upper ladder 22, and the pillar 21a of the lower ladder 21 is extended to the position equivalent to the upper end portion of the upper ladder 22, and therefore, the pillar 21a is not divided up and down, but is formed of a continuous body having no gap from the pit surface 6 to the attachment arm 13. Here, in embodiment 1, when the rigidity of the pit ladder 5 is to be increased, it is necessary to additionally mount the arm 13 near the connection portion 10, for example. On the other hand, since the support column 21a of the pit ladder apparatus 20 is not divided vertically, the attachment arm 13 does not need to be provided in the vicinity of the connection portion 23, and the rigidity is higher than that of the pit ladder apparatus 5.
Further, by providing the mounting arms 13, and by fixing one of the mounting arms 13 to the guide rail 4 and holding the lower ladder 21 by the other, the pit ladder apparatus 20 can be disposed in the hoistway 1 only by the elevator equipment (the guide rail 4) without relying on the building side body, beam, or the like.
In embodiment 1, the upper ladder 8 does not necessarily have to be moved in the horizontal direction with the support column 8a as a rotation axis. For example, by providing a mechanism capable of sliding the upper ladder 8 in the horizontal direction, the upper ladder can be moved in the horizontal direction without providing a rotation shaft, and the same operation and effect are obtained.
In embodiment 1, the plug 16 of the engaging portion 15 may not necessarily be biased in the vertical direction by the spring 18. For example, by providing a lock mechanism that holds the plug 16 in a position where the plug 16 is engaged with the striker 17, the spring 18 is not required, and the same action and effect can be obtained.
In embodiment 1, the support column 7a of the lower ladder 7 and the support column 8a of the upper ladder 8 may not be connected to each other. For example, the support column 7a and the support column 8a are disposed in the hoistway 1 without being connected to each other, and the support column 8a is rotatably supported by a wall surface in the hoistway 1, thereby naturally achieving the same operation and effect.
In embodiment 1, the connection portion 10 is provided with the convex portion 11 at the upper end portion of the support 8a and the concave portion 12 at the lower end portion of the support 8a, but this shape may not be used. For example, instead of the convex portion 11 and the concave portion 12, a bearing may be provided that connects the upper end portion of the support 8a and the lower end portion of the support 8a and can rotatably hold both the upper end portion of the support 8a and the lower end portion of the support 8a.
One of the mounting arms 13 is fixed to the guide rail 4 in the hoistway 1, but may not necessarily be fixed to the guide rail 4. For example, even if the fixing is made to a wall surface in the hoistway 1, the same operation and effect are naturally obtained.
The engagement portion 15 may not necessarily be directly manually operated by an operator to perform a coupling operation or a decoupling operation by extending his/her hand from the landing doorway 3. For example, when the distance from the landing doorway 3 to the pit ladder apparatus 5 is large, the operator may indirectly perform the coupling operation or the decoupling operation of the engaging portion 15 using a dedicated gripping tool or the like.
Description of the reference symbols
1: a hoistway; 2: a car; 3: a landing doorway; 4: a car guide rail; 5. 20: a pit ladder apparatus; 6: a bottom pit surface; 7. 21: a lower ladder; 8. 22: an upper ladder; 7a, 7b, 8a, 8b, 21a, 21b, 22a, 22b: a pillar; 9: a pedal; 10. 23: a connecting portion; 11: a convex portion; 12: a recess; 13: mounting an arm; 14: a torsion spring; 15: a fastening part; 16: a bolt; 17: a striker; 18: a spring; 19: a handle; 24: a hinge portion.
Industrial applicability
The present invention relates to a pit ladder device for an elevator, which is provided in a hoistway and is used for ascending and descending between a pit surface of the hoistway and a landing.
Claims (8)
1. A pit ladder device of an elevator, the elevator comprising: a lifting body which lifts and lowers within the hoistway; a guide rail that is provided in the hoistway and guides the lifting of the lifting body; and a pit ladder device provided in the hoistway, for raising and lowering an operator between a pit surface of the hoistway and a landing, the pit ladder device for an elevator comprising:
a lower ladder having a lower end fixed to the pit surface, the lower ladder being disposed at a height at which the vertically movable body does not collide with the pit surface when the vertically movable body moves to a lowermost position, and at least a part of the lower ladder overlapping a vertical projection plane of the vertically movable body;
an upper ladder disposed above the lower ladder, supported by the lower ladder, at least a part of which is movable and is connectable to or separable from the lower ladder;
a turning mechanism which is provided between the lower ladder and the upper ladder, supports the upper ladder, and can move the upper ladder between a storage position where the upper ladder does not overlap with a vertical projection plane of the lifting body and a use position where the upper ladder is connected to the lower ladder for use in the hoistway; and
an engaging portion capable of coupling or decoupling the lower ladder and the upper ladder to each other at the use position.
2. A pit ladder apparatus of an elevator according to claim 1,
the engaging portion is disposed at a height at which the engaging portion does not collide when the elevating body moves to the lowermost layer.
3. Pit ladder arrangement of an elevator according to claim 1 or 2,
the engagement section is disposed at a height that can be reached by a hand of the operator from the landing.
4. A pit ladder arrangement of an elevator according to any of claims 1 to 3,
the engaging portion includes: a latch pin which is always applied with force in the vertical direction by a spring; a handle provided to the plug pin and capable of moving the plug pin up and down; and a striker engaged with the latch.
5. A pit ladder arrangement of an elevator according to any of claims 1-4,
the lower ladder and the upper ladder are provided with a pair of support columns, a plurality of pedals are erected in the middle of the pair of support columns,
the turning mechanism is provided between the support column of the lower ladder and the support column of the upper ladder, and includes a projection formed in a vertical direction and a recess engageable with the projection, and the projection is engaged with the recess and is disposed to be rotatable with respect to each other.
6. A pit ladder arrangement of an elevator according to any of claims 1-4,
the lower ladder and the upper ladder are provided with a pair of pillars, a plurality of pedals are erected in the middle of the pillars,
the turning mechanism includes a hinge portion disposed between the pillar of the lower ladder and the pillar of the upper ladder, and the pillar of the lower ladder is extended to a position equivalent to an upper end portion of the upper ladder.
7. A pit ladder arrangement of an elevator according to any of claims 1 to 6,
the turning mechanism is provided with a torsion spring, and the elasticity of the torsion spring acts in the direction of returning the upper ladder from the use position to the storage position.
8. A pit ladder arrangement of an elevator according to any of claims 1 to 7,
the pit ladder device of the elevator is provided with a mounting arm, one mounting arm is fixed on the guide rail, and the other mounting arm holds the upper ladder or the lower ladder.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2020/013563 WO2021192129A1 (en) | 2020-03-26 | 2020-03-26 | Pit ladder device for elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115315403A true CN115315403A (en) | 2022-11-08 |
Family
ID=77891643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080098575.5A Pending CN115315403A (en) | 2020-03-26 | 2020-03-26 | Pit ladder device of elevator |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7224532B2 (en) |
| CN (1) | CN115315403A (en) |
| WO (1) | WO2021192129A1 (en) |
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| CN206836668U (en) * | 2016-12-31 | 2018-01-05 | 应文强 | High sunken bed for dormitory |
| CN208633757U (en) * | 2018-06-27 | 2019-03-22 | 刘红科 | A kind of tunnel lifting ladder |
| CN110159181A (en) * | 2019-06-28 | 2019-08-23 | 迅达（中国）电梯有限公司 | Elevator pit ladder mounting device |
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| JP2003327372A (en) * | 2002-05-10 | 2003-11-19 | Toshiba Elevator Co Ltd | Pit ladder device for elevator |
| JP2016155644A (en) * | 2015-02-24 | 2016-09-01 | 三菱電機ビルテクノサービス株式会社 | Elevator pit ladder and elevator safety operation system |
| JP6662345B2 (en) * | 2017-04-17 | 2020-03-11 | フジテック株式会社 | Elevator pit ladder device |
| CN110719882B (en) * | 2017-06-14 | 2021-07-16 | 株式会社日立制作所 | Pit ladder device of elevator |
| JP6717285B2 (en) * | 2017-10-31 | 2020-07-01 | フジテック株式会社 | Elevator pit ladder equipment |
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2020
- 2020-03-26 WO PCT/JP2020/013563 patent/WO2021192129A1/en active Application Filing
- 2020-03-26 JP JP2022510248A patent/JP7224532B2/en active Active
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| CN2295039Y (en) * | 1995-12-22 | 1998-10-21 | 郭玉海 | Multifunction anti-theft door |
| JP2004217410A (en) * | 2003-01-17 | 2004-08-05 | Hitachi Building Systems Co Ltd | Pit inspecting gangway ladder of elevator |
| JP2008024409A (en) * | 2006-07-20 | 2008-02-07 | Toshiba Elevator Co Ltd | Pit ladder device for elevator |
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| JP2016132516A (en) * | 2015-01-16 | 2016-07-25 | 三菱電機ビルテクノサービス株式会社 | Elevator balance weight shipping and carrying-in device |
| KR20170135756A (en) * | 2016-05-30 | 2017-12-08 | (주)대한특수승강기 | Safety equipment for installing at low pit of elevator way |
| CN206836668U (en) * | 2016-12-31 | 2018-01-05 | 应文强 | High sunken bed for dormitory |
| CN208633757U (en) * | 2018-06-27 | 2019-03-22 | 刘红科 | A kind of tunnel lifting 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 |
|---|---|
| JP7224532B2 (en) | 2023-02-17 |
| WO2021192129A1 (en) | 2021-09-30 |
| JPWO2021192129A1 (en) | 2021-09-30 |
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