JP2010030725A - Elevator system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To safely and efficiently perform inspection operations in the hoistway of an elevator. <P>SOLUTION: An elevator system includes the hoistway 1, a car 7 vertically moved in the hoistway 1, and an inspection stand 9. The inspection stand 9 is installed on the wall surface 2 of the hoistway, allowed to retreat when the car 7 is vertically moved to prevent the inspection stand from being interfered with the car 7, and expandable to close at least a part of the horizontal cross section of the hoistway 1. The inspection stand 9 is rotatable about a horizontal axis near the wall surface 2 of the hoistway, and has a flat plate-shaped step board 11 one surface of which serves as a step surface 12. When the step board 11 retreats, the step surface 12 is fixed near the wall surface 2 of the hoistway in such a manner as to face the wall surface 2 of the hoistway. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an elevator system including an inspection table that can be retracted to a wall surface of a hoistway.

  Generally, the depth dimension of the pit formed at the lowermost part of the elevator hoistway is determined by the rated speed of the elevator car or the like according to laws and regulations. The pit depth increases as the rated speed of the car increases, and some high-speed elevators have a depth of 4 m or more.

  Also, even if the lowest landing floors are different from each other in adjacent elevator hoistways in one building, the position of the pit floor formed at the bottom of the pit can be made the same in order to share the frame is there.

  For example, if the lowest landing floor of one elevator is the second basement floor and the lowest landing floor of the other elevator adjacent to this is the third basement floor, the number of landing floors is the second floor of the elevator hoistway. The pit floor is the same height as the pit floor of the elevator hoistway where the number of landing floors is the third basement. That is, the elevator pit on the second basement floor includes the height of the third basement floor (the height of one floor). In this case, the pit depth may exceed 7 m.

  In this type of elevator with a deep pit depth, for example, when checking the hoistway or the car from the lower surface outside the car, the hand cannot reach the car lower surface from the pit floor. The inspection work becomes difficult.

In such a case, especially for the inspection work to be performed from the lower side of the car, as disclosed in Patent Document 1, the inspection table is fixed to the guide rails and buffers of the car and the counterweight (C / W). On top of that, an inspection worker got on the inspection work.
Japanese Patent Laid-Open No. 2005-132569

  However, if an inspection stand is always installed in the hoistway, it cannot be installed in the range where the car moves up and down in the hoistway, so it must be installed at a position lower than the position where the inspection work is easy to perform. There is. In addition, a plurality of cords such as tail cords are suspended from the lower surface outside the car. Since these codes are placed on the inspection table while overlapping, the effective area for performing the inspection work is reduced.

  For example, it is possible to make a through hole in the inspection table and suspend these ropes under the inspection table, but the effective work area where the inspection operation can be performed is reduced. Furthermore, the inspection worker needs to perform the inspection while avoiding the opening, and the work efficiency may be deteriorated and more dangerous work may be involved.

  Further, if there is an opening in the inspection table, there is a problem that when the car is lifted, the cord is caught by the hook of the opening and damaged.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to enable safe and efficient inspection work performed in an elevator hoistway.

  In order to achieve the above object, an elevator system according to the present invention includes a hoistway, a car that moves up and down in the hoistway, and a car that is attached to a wall surface of the hoistway so that the car moves up and down. And an inspection table configured to be retractable so as not to interfere with the car and to be deployed in a state where at least a part of a horizontal section of the hoistway is closed.

  According to the present invention, it is possible to safely and efficiently perform inspection work performed in the elevator hoistway.

  Hereinafter, an embodiment of an elevator system according to the present invention will be described with reference to the drawings.

[First Embodiment]
1st Embodiment which concerns on the elevator system of this invention is described using FIGS. 1-3.

  FIG. 1 is a schematic vertical sectional view showing a part of the elevator system of the present embodiment. FIG. 2 is a schematic vertical sectional view showing a state in which the check table 9 of FIG. 1 is developed and the hoistway 1 is closed. 3 is a cross-sectional view taken along the line III-III in FIG. In FIG. 3, the building opening / closing door 76 shown in FIGS. 1 and 2 is not shown.

  First, the structure of the elevator system of this embodiment is demonstrated using FIG. The elevator system according to this embodiment includes a hoistway 1 having a pit 3 at the bottom, a car 7 that moves up and down along the car rail 71 in the hoistway 1, and a car disposed at the bottom of the pit 3. And a shock absorber 5. Further, this elevator system is attached to the hoistway wall surface 2 and can be retracted so as not to interfere with the car 7 moving up and down, and can be deployed in a state where at least a part of the horizontal section of the hoistway is closed. The inspection table 9 is provided.

  The hoistway 1 is a structure that extends in the vertical direction and has a substantially rectangular horizontal cross section and is provided inside and outside the building. On the side surface of the hoistway 1, that is, the hoistway wall surface 2, an entrance / exit 74 that is opened to stop the passenger car 7 and to get on and off passengers from the elevator hall 73 is formed for each floor where the passenger car 7 stops. Has been.

  The entrance / exit 74 is a generally rectangular opening, and a sill 75 is provided at the lower part of the entrance / exit 74 at the same height as the floor of the elevator hall 73. Further, a building opening / closing door 76 is disposed at the entrance / exit 74. In the example of FIG. 1, the lowermost entrance / exit 74 is shown.

  A pit 3 is formed in the hoistway 1 below the lowest floor where the car 7 stops, that is, at the bottom of the hoistway 1. The pit floor 3a and the pit side wall surface 3b are formed of, for example, concrete. The depth of the pit 3 is determined by the moving speed of the car 7 as described above. In the example of FIG. 1, the height (pit depth) from the pit floor 3a to the threshold 75 of the entrance / exit 74 on the lowest floor is formed to be higher than the height of the inspection worker.

  In the pit 3, a substantially cylindrical car shock absorber 5 extending upward from the pit floor 3a is disposed. The car shock absorber 5 has a buffer part 5a configured to be able to adjust the lower limit of the moving range of the car 7 at the upper end part, and a fixing part 5b that supports the buffer part 5a and fixes it to the pit floor part 3a. is doing. In addition, in this embodiment, although it is a substantially cylindrical shape, it is not restricted to this, For example, a rectangular parallelepiped shape may be sufficient.

  The inspection table 9 includes a horizontally extending tread plate rotation shaft 13 attached to the hoistway wall surface 2, a substantially rectangular flat plate tread 11 serving as a tread surface 12 on which one surface enters an inspection worker, and a tread plate 11 and an auxiliary arm 23 that connects the hoistway wall surface 2, an inspection platform fixing hook 17 that fixes the tread plate 11 at a retractable position, and a chain block 19 for rotating the tread plate 11.

  The tread plate rotation shaft 13 is fixed above the car shock absorber 5 and horizontally along the hoistway wall surface 2 via a tread plate bracket 15 or the like. The tread plate rotating shaft 13 is attached with a tread plate 11 configured to be rotatable around the tread plate pivot shaft 13. Although not shown in detail, the tread plate 11 is attached via a hinge or the like configured to rotate about the tread plate rotation shaft 13.

  Two auxiliary arms 23 are arranged on both sides of the tread plate 11, that is, in a direction perpendicular to the tread plate rotation shaft 13 with the tread plate 11 interposed therebetween. The auxiliary arm 23 is a link mechanism having two elongated flat-plate arms, that is, a first arm 25 and a second arm 27. One end of the first arm 25 is rotatably connected to the hoistway wall surface 2, and the other end is rotatably connected to the end of the second arm 27. The other end of the second arm 27 is rotatably connected to the side surface of the tread plate 11.

  The tread board 11 is pushed up and retracted during normal driving in which the car 7 moves up and down with passengers on it. At this time, the tread 12 is fixed so that the tread 12 is substantially parallel to the hoistway wall 2 and the tread 12 and the hoistway wall 2 face each other. At this time, the tread plate rotation shaft 13 and the tread plate 11 are arranged in this order from the bottom along the hoistway wall surface 2. Further, the two sets of auxiliary arms 23 are in a state of being broken at the connecting portion of the first arm 25 and the second arm 27. Due to such a configuration, the inspection table 9 can be retreated in a space-saving manner along the hoistway wall surface 2.

  The inspection table fixing hook 17 has a function of maintaining a retracted state in which the tread plate 11 is fixed to the hoistway wall surface 2. In the example of FIG. 1, the inspection table fixing hook 17 is attached above the tread plate rotating shaft 13 and is configured to fix the tip of the tread plate 11 on the side far from the tread plate rotating shaft 13. ing.

  By configuring the inspection table 9 as described above, the car 7 can be retracted so as not to interfere with the car 7 when the car 7 moves up and down.

  Next, a method for performing inspection work by expanding the inspection table 9 and closing a part of the horizontal section of the hoistway 1 will be described. In the present embodiment, an example of getting into the inspection table 9 from the entrance / exit 74 on the lowest floor of the elevator will be described.

  First, the car 7 is stopped so that the bottom of the car 7 is located above the threshold 75 of the entrance 74 on the lowest floor. Next, an inspection worker enters the pit 3, pulls the chain 21 of the chain block 19 attached to the inspection table 9, and rotates the tread 11 in the counterclockwise direction of FIGS. 1 and 2. Although a detailed illustration is omitted, a chain block 19 is attached to the inspection table 9, and by pulling the chain 21, the tread plate 11 is configured to be rotatable around the tread plate rotation shaft 13. . In addition, although illustration is abbreviate | omitted in the bottom part of the pit 3 with a deep pit depth, normally, the exclusive entrance / exit to the pit 3 is provided, and in this embodiment, an inspection worker enters a pit from this exclusive entrance / exit. .

  As shown in FIGS. 2 and 3, the front end of the tread plate 11 far from the tread plate rotation shaft 13 is rotated until it overlaps a part of the threshold 75 of the entrance / exit 74 so that the upper surface becomes the tread 12. And is fixed at a position (deployment position) where the hoistway 1 is closed in the horizontal direction.

  The auxiliary arm 23 supports the tread 11 with the first arm 25 and the second arm 27 extending substantially linearly. These auxiliary arms 23 improve the supporting force of the tread plate 11. The load acting on the tread plate 11 is configured to be distributed to the sill 75, the auxiliary arm 23, the tread plate rotation shaft 13, and the like.

  In this state, that is, when the inspection table 9 is in the unfolded state, an inspection worker can get into the tread board 11 from the entrance 74 and can perform the inspection work. Since the tread 12 of the tread plate 11 is a flat surface without a step, an inspection worker can perform the inspection more safely.

  Note that the tail cord or the like suspended from the lower surface of the car 7 may be hung on the hoistway wall surface 2 side that is not closed by the tread plate 11.

  A method of returning the inspection platform 9 to the retractable position after the inspection work is completed and returning the car 7 to a state in which the car 7 can move up and down will be described below.

  First, the inspection worker passes through the entrance 74 and exits from the hoistway 1 to the elevator hall 73. Next, the pit 3 is entered from the entrance / exit for the pit, the chain 21 is pulled, and the tread plate 11 is rotated around the tread plate rotation shaft 13 in the clockwise direction in FIGS. 1 and 2. The chain 21 of the chain block 19 is fixed so as not to move by rotating until the state shown in FIG. 1, that is, until the tread plate 11 and the hoistway wall surface 2 are parallel to each other.

  Thereafter, the car 7 is moved downward until the upper surface of the car 7 is located in the vicinity of the sill 75, and enters the upper surface of the car 7 from the entrance 74, and the inspection table fixing hook 17 is fixed to the tread 11. At this time, the lower limit position of the movement range of the buffer portion 5a may be adjusted downward than usual.

  Thereafter, the inspection is completed by operating the elevator hall 73 to switch the car 7 to the normal operation state.

  As can be seen from the above description, according to the present embodiment, the inspection performed in the elevator hoistway 1 by using the inspection table 9 that can be retracted so as not to interfere with the car 7 that moves up and down during normal operation. Work can be performed safely and efficiently.

[Second Embodiment]
A second embodiment of the elevator system according to the present invention will be described with reference to FIGS. 4 and 5. FIG. 4 is a schematic front view showing the inspection table 9 of the elevator system of the present embodiment. 5 is a cross-sectional plan view taken along arrow VV in FIG. In addition, this embodiment is a modification of 1st Embodiment, Comprising: The same code | symbol is attached | subjected to the same part or similar part as 1st Embodiment, and duplication description is abbreviate | omitted.

  In the present embodiment, safety devices 31 are attached to both sides of the tread board 11. These safety devices 31 include a safety fence 33 for preventing an inspection worker from falling from the tread board 11 to the pit 3, and a safety fence rotation shaft 35 for rotating the safety fence 33. .

  The safety fence rotation shaft 35 extends in a direction perpendicular to the tread plate rotation shaft 13 and is arranged on the outer peripheral side of the tread 12 in the direction of the tread plate rotation shaft 13. The safety fence rotating shaft 35 is fixed on the tread 12 via a safety fence bracket 37 or the like.

  The safety fence 33 has a substantially rectangular shape and is attached so as to be rotatable around each of the two safety fence rotation shafts 35. These safety fences 33 are configured to rotate from a state where one surface is in contact with the tread surface 12 to a state perpendicular to the tread surface 12.

  When the car 7 moves up and down, that is, when the inspection table 9 is retracted so as not to interfere with the car 7, the safety fence 33 is fixed with one surface in contact with the tread surface 12. Yes.

  When the tread 11 extends horizontally and the inspection table 9 closes a part of the horizontal section of the hoistway 1, that is, when the inspection table 9 is deployed, the safety fence 33 is perpendicular to the tread 12. It can be fixed in a stable state.

  Before starting the inspection work, the safety fence 33 is rotated and fixed in a state perpendicular to the tread 12. After the inspection is completed, the safety fence 33 is rotated and fixed in contact with the tread 12. Thereafter, as in the first embodiment, the inspection table 9 is returned to the retractable position and retracted so as not to interfere with the car 7 that moves up and down.

  As can be seen from the above description, according to the present embodiment, safety is improved as compared with the first embodiment.

[Third Embodiment]
A third embodiment of the elevator system according to the present invention will be described with reference to FIG. FIG. 6 is a partial plan sectional view showing a part of the inspection table 9 of the elevator system according to the present embodiment. In addition, this embodiment is a modification of 1st Embodiment, Comprising: The same code | symbol is attached | subjected to the same part or similar part as 1st Embodiment, and duplication description is abbreviate | omitted.

  In the present embodiment, a motor 41 is connected to at least one end of the tread plate rotation shaft 13, and the tread plate 11 is configured to be rotatable by the driving force of the motor 41. Further, the motor 41 is configured to be operable from the outside of the hoistway 1, for example, from an elevator hall 73.

  The motor 41 has a hinge gear 43 that rotates coaxially with the tread plate turning shaft 13 at one end of the tread plate turning shaft 13, and meshes the motor gear 45 with the hinge gear 43. The motor 41 is installed so as to rotate coaxially with the motor gear 45, and the driving force of the motor 41 is transmitted to the treadle rotating shaft 13.

  As can be seen from the above description, according to the present embodiment, it is not necessary for the inspection worker to get down to the pit 3 and operate the chain block 19 to rotate the tread 11 so that the first and second embodiments. As compared with the above, the tread 11 can be easily rotated, and the working efficiency is improved.

[Fourth Embodiment]
A fourth embodiment of the elevator system according to the present invention will be described with reference to FIG. FIG. 7 is a partial vertical sectional view showing the inspection table 9 of the elevator system of the present embodiment. In addition, this embodiment is a modification of 1st Embodiment, Comprising: The same code | symbol is attached | subjected to the same part or similar part as 1st Embodiment, and duplication description is abbreviate | omitted.

  In this embodiment, the accommodation confirmation device 51 is attached to the hoistway wall surface 2 below the auxiliary arm 23 below the inspection table fixing hook 17. The accommodation confirmation device 51 includes an accommodation confirmation device bracket 55 and an accommodation confirmation device limit switch 53. The accommodation confirmation device limit switch 53 is fixed to the hoistway wall surface 2 via the accommodation confirmation device bracket 55.

  The accommodation confirmation device limit switch 53 is pushed when the inspection table 9 is retracted, that is, when the tread 11 is fixed in parallel with the hoistway wall surface 2. The state is maintained. At this time, the accommodation confirmation device limit switch 53 is configured such that the switch is “ON”. When the step board 11 is separated from the accommodation confirmation device limit switch 53, that is, when the switch is in the “OFF” state, control is performed so that the car 7 cannot move up and down.

  Thereby, it is possible to prevent the car 7 from colliding with the inspection table 9 and to perform inspection work more safely.

[Fifth Embodiment]
A fifth embodiment of the elevator system according to the present invention will be described with reference to FIG. FIG. 8 is a partial elevational sectional view showing a part of the elevator system of the present embodiment. In addition, this embodiment is a modification of 1st Embodiment, Comprising: The same code | symbol is attached | subjected to the same part or similar part as 1st Embodiment, and duplication description is abbreviate | omitted.

  The elevator is obligated by laws and regulations to install limit switches (not shown) for restricting the movement of the car 7 on the uppermost floor and the lowermost floor. In this embodiment, in addition to these limit switches, a direction control device 61 is provided on the car rail 71 for assisting the elevator car 7 to move up and down.

  The direction control device 61 includes a direction control limit switch 63, a mounting arm 65, and a limit switch cam 67. A direction control limit switch 63 and a limit switch cam 67 are attached to the car rail 71 via an attachment arm 65. FIG. 8 shows an example in which the downward movement is restricted.

  The direction control limit switch 63 is configured to be movable up and down together with the car 7. The limit switch cam 67 extends in a straight line in the vertical direction, and is configured to maintain a distance that can always contact the direction control limit switch 63. In the vicinity of the lower limit position of the car 7, it is curved in a direction away from the direction control limit switch 63.

  In this embodiment, it functions so that the limit switch 53 for the accommodation confirmation device of the fourth embodiment is in the “OFF” state, that is, when the inspection table 9 is deployed and the inspection work can be performed. It is configured.

  When the car 7 is above the predetermined position (lower limit position), the direction control limit switch 63 is kept pressed by the limit switch cam 67. The state in which the direction control limit switch 63 is pressed is the state of the switch “ON”.

  When the position of the car 7 is accidentally lowered below the lower limit position, the limit switch cam 67 releases the state where the direction control limit switch 63 is pressed, and the switch is turned off. At this time, the driving of the car 7 is controlled to stop forcibly.

  In addition, although the attachment position of the apparatus 61 for direction control is attached to the car rail 71, it is not restricted to this. What is necessary is just to be comprised so that it can detect that the car moved below the lower limit position set.

  As can be seen from the above description, according to the present embodiment, it is possible to suppress the car 7 from being accidentally lowered from a predetermined position during the inspection work, and to perform the inspection work more safely.

[Other Embodiments]
The description of the above embodiment is an example for explaining the present invention, and does not limit the invention described in the claims. Moreover, each part structure of this invention is not restricted to these embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.

  In the first to fifth embodiments described above, an example has been described in which the car 7 is stopped in the vicinity of the lowermost floor and the passenger enters the inspection table 9 from the elevator hall 73 on the lowermost floor. However, the present invention is not limited thereto. An inspection table 9 can be installed on the hoistway wall surface 2 of the floor where the inspection work is easier to perform, and the inspection work can be performed.

  Moreover, although the means which accommodates the inspection stand 9 in order to evacuate interference with the cage | basket | car 7 which moves up and down demonstrated the example rotated around the rotation axis | shaft 13 for treads, it is not restricted to this.

  For example, the horizontal cross section of the hoistway wall surface 2 may be closed by unfolding the tread plate 11 configured, for example, as a shutter from the hoistway wall surface 2 in the horizontal direction. Moreover, the structure which can fold two treads 11 may be sufficient.

  Further, a recess for accommodating the inspection table 9 may be provided in the hoistway wall surface 2, and the inspection table 9 may be retracted by being placed in this recess when retracted.

1 is a schematic vertical sectional view showing a part of an elevator system according to a first embodiment of the present invention. FIG. 2 is a schematic vertical sectional view showing a state in which the inspection table is opened and the hoistway is closed in the embodiment of FIG. 1. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. It is a schematic front view which shows the inspection stand of the elevator system of 2nd Embodiment which concerns on this invention. It is a VV arrow plane sectional view in FIG. It is a partial plane sectional view showing a part of an inspection stand of an elevator system of a 3rd embodiment concerning the present invention. It is a fragmentary sectional view which shows the inspection stand of the elevator system of 4th Embodiment which concerns on this invention. It is a fragmentary sectional view which shows a part of elevator system of 5th Embodiment which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Hoistway, 2 ... Hoistway wall surface, 3 ... Pit, 3a ... Pit floor part, 3b ... Pit side wall surface, 5 ... Car buffer, 5a ... Buffer part, 5b ... Fixed part, 7 ... Riding car, 9 ... Inspecting table, 11 ... tread, 12 ... tread surface, 13 ... tread axis, 15 ... tread bracket, 17 ... fixing hook, 19 ... chain block, 21 ... chain, 23 ... auxiliary arm, 25 ... first 1 arm, 27 ... second arm, 31 ... safety device, 33 ... safety fence, 35 ... pivot for safety fence, 37 ... bracket for safety fence, 41 ... motor, 43 ... hinge gear, 45 ... motor gear, 51 ... housing Confirmation device, 53 ... Limit switch for accommodation confirmation device, 55 ... Bracket for accommodation confirmation device, 61 ... Device for direction control, 63 ... Limit switch for direction control, 65 ... Arm for mounting, 67 ... Limit switch cam, 71 ... Please rail, 73 ... elevator hall, 74 ... entrance, 75 ... threshold, 76 ... building open and close door

Claims (7)

A hoistway,
A car that moves up and down in the hoistway,
It is attached to the wall surface of the hoistway, and can be retracted so as not to interfere with the car when the car moves up and down, and at least a part of the horizontal section of the hoistway can be deployed in a closed state An inspection table,
An elevator system comprising:   The said inspection stand is comprised so that rotation around the horizontal axis | shaft along the said hoistway wall surface vicinity is possible, and it has a flat plate-shaped tread which makes one surface a tread surface. Elevator system.   The step board is fixed in a state where the tread surface is in the vicinity of the hoistway wall surface and faces the hoistway wall surface when retracted so as not to interfere with the riding car. The elevator system according to 2. A substantially rectangular shape configured to rotate around an axis near the outer peripheral side on the tread surface, and configured to be rotatable so that one surface is in contact with the tread surface and is perpendicular to the tread surface. With a safety fence
When the inspection table is retracted, the safety fence is fixed with one surface in contact with the tread surface,
When the inspection table is deployed and a part of the horizontal section is closed, the safety fence is configured to be fixable in a state substantially perpendicular to the tread surface,
The elevator system according to claim 2 or 3, wherein On the hoistway wall surface, a horizontally extending treadle pivot is attached,
A motor is connected to the treadle pivot,
The tread is configured to be rotatable around the tread plate rotation shaft by the driving force of the motor,
The motor is configured to be operable from outside the hoistway;
The elevator system according to any one of claims 2 to 4, wherein The hoistway has a pit formed at the bottom,
On the hoistway wall surface above the pit, a boarding gate for getting on and off the car is formed,
The inspection platform is developed so as to close a part of the horizontal section having the same height as the sill formed at the lower part of the entrance and exit, and is configured to be able to get on the tread from the entrance and exit. That
The elevator system according to any one of claims 1 to 5, wherein:   When the inspection table is retracted, the inspection table outputs a signal indicating that the inspection table is not being used, and based on this signal, the vehicle is recognized as being in a state in which the car can move up and down. The elevator system according to any one of claims 1 to 6, further comprising: a control unit configured to perform control.

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