JPWO2018216201A1 - Pit ladder for elevator - Google Patents

Abstract

In the elevator apparatus, the elevator pit ladder includes a first ladder member having a first horizontal rail, and a second ladder member connected to the first ladder member. At least a part of the first horizontal rail overlaps a part of the car area when the hoistway is viewed from above. In the region where the first horizontal rail overlaps with the car when the hoistway is viewed from above, the first horizontal rail is positioned lower than the car when it collides with a shock absorber installed in the pit portion in the hoistway. Is arranged. The second ladder member is disposed outside the cage area when the hoistway is viewed from above. The upper end part of the 2nd ladder member is located in the position higher than the position of the floor surface of the lowest floor.

Description

  The present invention relates to an elevator pit ladder fixed to a pit portion in a hoistway.

  Conventionally, in order to allow workers to enter and exit pits in the hoistway, the elevator pit entrance device has an footrest attached to the wall of the hoistway and a handrail attached to a car guide rail that guides the movement of the car. Are known. In such a conventional elevator pit entrance device, the footrest is disposed at a position lower than the position of the car when the car collides with a shock absorber provided in the pit in the hoistway. The dimensions are secured. The handrail portion is disposed separately from the footrest portion at a position not overlapping in plan view with the car (see, for example, Patent Document 1).

JP 2012-236666 A

  In the conventional elevator pit entry / exit device disclosed in Patent Document 1, the handrail portion attached to the car guide rail is disposed separately from the footrest portion, so the rigidity of the handrail portion is difficult to ensure . Moreover, since it is necessary to install a handrail part and a footrest part separately, the effort of the installation operation | work of a pit access device will also take.

  The present invention has been made to solve the problems as described above, and it is possible to secure a space for hooking the first cross rail and to easily secure rigidity, and installation work It is an object of the present invention to obtain an elevator pit ladder that can facilitate the

  An elevator pit ladder according to the present invention is an elevator pit ladder fixed to a pit portion in a hoistway, and is connected to a first ladder member having a first cross rail and a first ladder member. And the second cross member at least a portion of the first cross rail overlaps a portion of the area of the car when viewed from above the hoistway, and when viewed from above the hoistway In the area where the cross bar of 1 overlaps the car, the first cross bar is placed at a lower position than the car when it collides with the shock absorber installed in the pit part in the hoistway, and the second ladder member is When viewed from above the hoistway, it is disposed outside the area of the car, and the upper end portion of the second ladder member is positioned higher than the position of the floor surface of the lowermost floor.

  According to the elevator pit ladder according to the present invention, it is possible to secure a space for hooking the first cross rail without increasing the area in the horizontal direction of the hoistway. Also, the rigidity of the pit ladder can be easily enhanced. Furthermore, the pit forceps 21 can be handled as an integral body, and the installation work of the pit forceps to the pit portion in the hoistway can be facilitated.

1 is a top view showing an elevator according to Embodiment 1 of the present invention. It is a perspective view which shows the pit part in the hoistway of FIG. It is a front view which shows a part of pit part in a hoistway when it sees from the landing side of FIG. It is a front view which shows the pit part in a hoistway when it sees from the cage | basket side of FIG. It is a perspective view which shows the state in which the pit forceps by Embodiment 2 of this invention is installed in the pit part in a hoistway. It is a front view which shows the pit part in a hoistway when it sees from the cage | basket side of FIG. It is a perspective view which shows the pit forceps of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1
FIG. 1 is a top view showing an elevator according to Embodiment 1 of the present invention. 2 is a perspective view showing a pit portion in the hoistway 1 of FIG. In the figure, in the hoistway 1, a pair of car guide rails 2 facing each other in the width direction of the hoistway 1 and a pair of counterweight guide rails 3 facing each other in the depth direction of the hoistway 1 are arranged. ing. Each car guide rail 2 and each counterweight guide rail 3 are fixed in the hoistway 1 by a plurality of rail brackets 4 which are rail support members.

  A car 5 is disposed between the pair of car guide rails 2, and a counterweight 6 is disposed between the pair of counterweight guide rails 3. The car 5 and the counterweight 6 are suspended in the hoistway 1 by a cord-like body (not shown) wound around a drive sheave of the hoist. For example, a rope or a belt is used as the cord. When the rope-like body is moved by the driving force of the hoist, the car 5 is guided by the pair of car guide rails 2 to move vertically, and the counterweight 6 is guided by the pair of counterweight guide rails 3 Move up and down.

  The hoistway 1 is formed with a pair of hoistway wall surfaces 1 a and 1 b facing each other in the width direction of the hoistway 1. A landing entrance 8 is provided at the landing 7 of each floor. The width direction of the landing doorway 8 coincides with the width direction of the hoistway 1. A landing sill 9 is disposed below the landing entrance 8 along the width direction of the landing entrance 8. The landing doorway 8 is opened and closed by moving a plurality of landing doors (not shown) in the longitudinal direction of the landing sill 9.

  The car 5 has a car body 10 and a car sill 11 provided on the car body 10.

  The car body 10 is formed with a front face 10a, a back face 10b, and a pair of side faces 10c and 10d. The front surface 10 a and the back surface 10 b of the car body 10 face each other in the depth direction of the hoistway 1, and the pair of side faces 10 c and 10 d of the car body 10 face each other in the width direction of the hoistway 1. A car door 12 is formed on the front surface 10 a of the car body 10. The car 5 is disposed in the hoistway 1 with the car entrance 12 facing the landing entrance 8 when the hoistway 1 is viewed from above. Thus, one side surface 10c of the car body 10 faces the hoistway wall surface 1a, and the other side surface 10d of the car body 10 faces the hoistway wall surface 1b.

  The car sill 11 is disposed at the lower part of the car entrance 12 along the width direction of the car entrance 12. The car door 12 is opened and closed by moving a plurality of car doors (not shown) in the longitudinal direction of the car sill 11.

  When the hoistway 1 is viewed from above, the counterweight 6 is disposed in a space between one side surface 10 c of the car main body 10 and one hoistway wall surface 1 a. Thus, the elevator in the present embodiment is a counterweight falling elevator. A part of the car sill 11 protrudes from the car body 10 as a protrusion 11 a when the car 5 is viewed from above. In this example, when the car 5 is viewed from above, the longitudinal end of the car sill 11 protrudes from the car body 10 as the protrusion 11a toward the one hoistway wall surface 1a on the side where the counterweight 6 is disposed. ing.

  A shock absorber 13 and a pit insulator 21 are installed at a pit portion in the hoistway 1, that is, at a bottom portion in the hoistway 1.

  The car 5 collides with the shock absorber 13 when the car 5 passes the lower floor position downward due to some abnormality. When the shock absorber 13 collides with the car 5, the shock absorber 13 absorbs the shock from the car 5 and mitigates the shock to the car 5. The position of the car 5 when the car 5 collides with the shock absorber 13 and the shock absorber 13 is contracted, that is, the pushed-down position of the car 5 is the lower limit position BL of the movement tolerance of the car 5.

  The pit ladder 21 is disposed in a space on the counterweight 6 side of the car 5 in the hoistway 1 when viewed from the landing 7. When maintenance work is performed on a device installed in a pit portion in the hoistway 1, for example, the shock absorber 13, it moves between the landing entrance 8 of the landing 7 on the lower floor and the pit portion in the hoistway 1 Maintenance personnel go up and down the pit ladder 21.

  The pit forceps 21 includes a foothold forceps member 22 which is a first forceps member, a handle forceps member 23 which is a second forceps member connected to the foothold forceps member 22, a foothold forceps member 22 and a handle forceps member 23 And a plurality of connecting members 24 for connecting the forceps members 23 to the foothold forceps members 22.

  The foothold forceps member 22 includes a pair of first vertical bars 221 and a plurality of first horizontal bars 222 fixed between the pair of first vertical bars 221. In this example, as shown in FIG. 2, the foothold forceps member 22 is fixed to the bottom surface of the hoistway 1 by an anchor bolt or the like.

  The pair of first vertical bars 221 are arranged parallel to each other along the vertical direction. Thereby, the pair of first vertical bars 221 are opposed to each other in the width direction of the pit insulator 21.

  As shown in FIG. 2, the plurality of first horizontal bars 222 are spaced apart from each other in the longitudinal direction of the pair of first vertical bars 221. Further, as shown in FIG. 1, the plurality of first horizontal bars 222 are disposed apart from the one hoistway wall surface 1a by the set distance L1. Further, at least a part of the first horizontal crosspiece 222 overlaps a part of the area of the car 5 when the hoistway 1 is viewed from above. In this example, when the hoistway 1 is viewed from above, the first horizontal crosspieces 222 overlap only with the area of the protrusion 11 a of the car sill 11.

  The handle ladder member 23 is disposed outside the area of the car 11 as shown in FIG. 1 when the hoistway 1 is viewed from above. Thereby, interference with the handle 5 and the basket 5 is avoided. Further, the handle lever member 23 is disposed at a position shifted from the foot-hanging ladder member 22 in the direction orthogonal to each of the first vertical beam 221 and the first horizontal beam 222. Thereby, when the hoistway 1 is viewed from above, the handlebar ladder member 23 is disposed between one of the hoistway wall surfaces 1a and the footrest ladder member 22.

  The handle lever member 23 has a pair of second vertical bars 231 and an upper bar 232 fixed between the upper end portions of the pair of second vertical bars 231. The pair of second vertical bars 231 are arranged in parallel to each other along the vertical direction. Thus, the pair of second vertical bars 231 are opposed to each other in the width direction of the pit insulator 21. In this example, the dimensions of the handle forceps member 23 in the width direction of the pit forceps 21 are the same as the dimensions of the foothold forceps member 22 in the width direction of the pit forceps 21. The position of the upper end portion of the handle lever member 23 is higher than the position of the upper end portion of the footrest ladder member 22 as shown in FIG. The position of the lower end portion of the handle forceps member 23 is lower than the position of the upper end portion of the foothold insulator member 22.

  The handle forceps 23 is connected to one of the car guide rails 2 via a plurality of mounting arms 25. Each attachment arm 25 is attached to each of the pair of second vertical rails 231 and one car guide rail from the one hoistway wall surface 1a side.

  The plurality of connecting members 24 are fixed between the first longitudinal bar 221 and the second longitudinal bar 231. In this example, among the plurality of first horizontal beams 222 of the foothold forceps member 22, the plurality of connecting members 24 is the first vertical beam 221 at a position lower than the first horizontal beam 222 disposed at the highest position. It is fixed to The entire shape of the pit ladder 21 when viewed along the width direction of the pit ladder 21 is Z-shaped by the foothold ladder member 22, the handle ladder member 23 and the plurality of connecting members 24.

  FIG. 3 is a front view showing a part of a pit portion in the hoistway 1 when viewed from the landing 7 side of FIG. 4 is a front view showing a pit portion in the hoistway 1 when viewed from the side of the car 5 of FIG. The lower end portion of the car main body 10 protrudes below the position of the lower surface of the car sill 11. The lower end portion of the car main body 10 protruding downward from the lower surface of the car sill 11 collides with the shock absorber 13.

  In a region where the first horizontal beam 222 overlaps the car 5 when the hoistway 1 is viewed from above, the car 5 at the time of collision with the shock absorber 13, ie, the lower limit position BL of the movement tolerance of the car 5 The first cross beam 222 is disposed at a position lower than the car 5. In this example, the entire footrest ladder member 22 including the first cross beam 222 is disposed at a position lower than the car sill 11 of the car 5 when it collides with the shock absorber 13. Thereby, interference of the car 5 with the foot hooking ladder member 22 is avoided.

  The position of the upper end portion of the handle ladder member 23 is higher than the lowest floor level FL which is the height position of the lowest floor. The maintenance worker holds the second vertical rail 231 of the handle lever member 23 by hand while hanging the foot on the first horizontal rail 222 of the leg-hanging ladder member 22 to move the pit insulator 21 up and down.

  In such a pit ladder 21, when the hoistway 1 is viewed from above, at least a portion of the first horizontal crosspiece 222 of the footrest ladder member 22 overlaps a portion of the area of the car 5 and the hoistway 1 In a region where the first horizontal beam 222 overlaps the car 5 when viewed from above, the first horizontal beam 222 is disposed at a position lower than that of the cage 5 when it collides with the shock absorber 13. The distance from the hoistway wall surface 1a to the first horizontal cross bar 222 can be expanded without enlarging the area of the road 1 in the horizontal direction, and a space for hooking the first horizontal cross bar 222 is secured. Can. Further, since the handle forceps 23 is connected to the foothold forceps 22, the rigidity of the pit forceps 21 can be enhanced. Furthermore, since the pit forceps 21 can be handled as an integral body, there is no need to separately install the foothold forceps member 22 and the handle forceps member 23, and the work of installing the pit forceps 21 in the pit portion in the hoistway 1 can be performed. It can be easy.

  Further, since the handle forceps member 23 is connected to the car guide rail 2, the state of the pit forceps 21 fixed to the pit portion in the hoistway 1 can be stabilized.

  Further, since the first horizontal crosspiece 222 overlaps only with the area of the car sill 11 when the hoistway 1 is viewed from above, the car located at a higher position than the portion of the car 5 that collides with the shock absorber 13 The height position of the first horizontal bar 222 can be set with reference to the lower surface of the sill 11. Thereby, the position of the first horizontal crosspiece 222 can be brought close to the lower floor level FL, and the use of the pit forceps 21 can be facilitated.

  Further, a part of the car sill 11 is a protruding portion 11 a protruding from the car main body 10, and the first horizontal cross bar 222 is a protrusion 11 a of the car sill 11 when the hoistway 1 is viewed from above. Since they overlap, it is possible to install the pit forceps 21 by effectively utilizing the space in the hoistway 1.

Second Embodiment
FIG. 5 is a perspective view showing a state in which the pit forceps 21 according to Embodiment 2 of the present invention is installed in a pit portion in the hoistway 1. 6 is a front view showing a pit portion in the hoistway 1 when viewed from the side of the car 5 in FIG. Further, FIG. 7 is a perspective view showing the pit forceps 21 of FIG. In addition to the pair of second vertical bars 231 and the upper bars 232, the handle lever member 23 further includes a plurality of second horizontal bars 233 fixed between the pair of second vertical bars 231. There is. The configuration of the pair of second vertical beams 231 and upper beams 232 is the same as that of the first embodiment.

  The plurality of second horizontal bars 233 are located below the upper bar 232. Further, the plurality of second horizontal bars 233 are arranged at intervals in the longitudinal direction of the pair of second vertical bars 231. The other configuration is the same as that of the first embodiment.

  In such a pit ladder 21, the plurality of second horizontal bars 233 fixed between the pair of second vertical bars 231 are arranged at intervals in the longitudinal direction of the pair of second vertical bars 231. Therefore, when the maintenance worker goes up and down the pit ladder 21, the second horizontal beam 233 can be grasped by hand, and the up and down movement of the pit ladder 21 can be further facilitated.

  In each of the above embodiments, when the hoistway 1 is viewed from above, the first horizontal crosspiece 222 overlaps only with the area of the projecting portion 11a of the car sill 11. However, the present invention is not limited to this. When the hoistway 1 is viewed from above, the first cross beam 222 may overlap any area of the car sill 11 and the car body 10.

  In each of the above-described embodiments, the handle forceps 23 is connected to the car guide rail 2. However, the handle forceps 23 may be connected to the hoistway wall surface 1a.

  Further, in each of the above embodiments, although the foot hooking ladder member 22 is fixed to the bottom surface of the hoistway 1, the foot hooking ladder member 22 may be connected to the hoistway wall surface 1a. The members 22 may be connected.

  In each of the above embodiments, the present invention is applied to an elevator in which counterweight 6 is disposed in the space between one side surface 10c of car body 10 and hoistway wall surface 1a when hoistway 1 is viewed from above. This invention is applied to a counterweight after fall type elevator in which a counterweight 6 is disposed in the space between the rear surface 10b of the car body 10 and the hoistway wall surface when the hoistway 1 is viewed from above May apply.

  Reference Signs List 1 hoistway, 2 car guide rails, 5 cars, 10 car bodies, 11 car sills, 11a protrusions, 13 shock absorbers, 21 pit ladders, 22 foot ladder members (first ladder members), 23 hand insulator members (second 2 ladder members), 24 connecting members, 222 first rungs.

Claims (5)

A pit ladder for an elevator fixed to a pit portion in a hoistway,
A first ladder member having a first crosspiece, and a second ladder member connected to the first ladder member,
At least a portion of the first rung overlaps a portion of the area of the car when viewed from above the hoistway,
In a region where the first cross beam overlaps the car when the hoistway is viewed from above, at a position lower than the car when it collides with a shock absorber installed in a pit portion in the hoistway Said first rungs are arranged,
The second ladder member is disposed outside the area of the car when the hoistway is viewed from above;
An upper end portion of the second ladder member is positioned higher than a floor surface position of a lowermost floor.   The elevator ladder according to claim 1, wherein the second ladder member is connected to a car guide rail that guides movement of the car. The car has a car body and a car sill provided on the car body,
The pit ladder for an elevator according to claim 1 or 2, wherein the first cross rail overlaps only the area of the car sill when the hoistway is viewed from above. A portion of the car sill is a projection which projects from the car body,
The elevator ladder according to claim 3, wherein the first cross rail overlaps the area of the protrusion of the car sill when the hoistway is viewed from above. A connecting member for connecting the second forceps member to the first forceps member;
The entire shape of the pit ladder as viewed along the width direction of the pit ladder is Z-shaped by the first ladder member, the second ladder member, and the connecting member. The pit ladder for elevators as described in any one of claim 4.

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