WO2015159319A1 - Pit entry/exit device for elevator - Google Patents

Abstract

The purpose of the present invention is to provide a pit entry/exit device for an elevator, the pit entry/exit device being permanently installed on the rear surface of a guide rail to enable a worker to safely and conveniently enter and exit a pit. In order to achieve this purpose, the pit entry/exit device (8) for an elevator, the pit entry/exit device (8) being installed within the hoistway (1) and being used by a worker to enter and exit the pit (7) in the hoistway from and to a landing (2), has tread plates (9) mounted apart from each other in the vertical direction. In a vertical projection plane within the hoistway, the landing and the guide rail (4a) for guiding a vertically movable body are respectively provided within predetermined regions. In a horizontal projection plane within the hoistway, the tread plates are affixed to the rear surface of the guide rail or the vicinity thereof in such a manner that the tread plates intersect the vertical direction of the guide rail. The distance from an end of the guide rail, the end being where the guide rail and each of the tread plates intersect, to an end of a portion of the tread plate, the portion extending in the direction away from the guide rail, the end being located on the side opposite the guide rail, is set to be equal to or greater than a foot width.

Description

Elevator pit access device

The present invention relates to an elevator pit entry / exit device for an operator to enter / exit a hoistway pit.

For maintenance and inspection of equipment installed in the elevator pit, workers may enter and exit the pit from the lowest floor landing. Since there is a step from the lowest floor landing to the bottom of the pit, it is necessary to provide a mechanism that allows workers to enter and exit safely. In the machine room-less elevator, there are many devices arranged in the hoistway, and space saving of the hoistway plane dimension is required, so the configuration and arrangement of the pit access device becomes a problem. In particular, when the size of the car is small, the space in which the pit access device can be arranged in the vertical projection plane is limited. Therefore, the mounting arm with a hook is fixed to the guide rail, and the upper end of the pit entry / exit device is fixed to the hook so that the ladder does not fall off and drop due to vibrations during an earthquake or elevator lift (Patent Document 1 and 2) Or, when the elevator is in normal operation, it is housed on the back side of the guide rail, pulled out to the landing side during use, and fixed to the bracket installed on the landing side. 3).

JP2003-246562 JP-A-2005-263387 JP2013-220913A

In such an elevator, during normal operation, the pit entry / exit device is housed in the hoistway so as not to interfere with the elevator equipment that moves up and down. When an operator enters and exits the pit, in order to use the pit entry / exit device, preparation work is required to make the pit entry / exit device stored in the hoistway ready for use at a landing according to a predetermined procedure. In this preparatory work, there is a possibility that the worker falls from the landing to the hoistway, and there is a problem that safety and convenience are inferior. Further, when the pit entrance / exit device is not used, it is necessary to confirm that the pit entrance / exit device is correctly stored so as not to interfere with the elevator equipment using a mechanical or electrical sensor.

The present invention has been made to solve the above-described problems, and by always installing a pit entry / exit device on the back of the guide rail, the pit entry / exit device can be stored or used from the stored state. It is an object of the present invention to provide an elevator pit entry / exit device that allows a worker to enter and exit the pit safely and conveniently.

The elevator pit entry / exit device according to the present invention is a pit entry / exit device installed in a hoistway and used for entering / exiting from the landing into the pit of the hoistway, and a plurality of pit entry / exit devices installed at intervals in the vertical direction. The guide rail for guiding the landing and the lifting body on the vertical projection surface in the hoistway are provided within a predetermined range, and each tread on the horizontal projection surface in the hoistway is provided on the guide rail. The length from the end of the guide rail that is fixed to the back of the guide rail or in the vicinity so that it intersects the vertical direction, and the end of the tread that extends to the opposite side of the guide rail. Is arranged to be equal to or more than the foot width.

This invention, when entering and exiting a pit using a pit entry / exit device, prepares the pit entry / exit device stored in the hoistway in a usable state, and stores it in the hoistway when the pit entry / exit device is not used. It is possible to realize a highly safe and convenient pit entry / exit device that can use the pit entry / exit device as it is from the hall without taking time and effort.

It is a front view which shows the pit entrance / exit apparatus of the elevator by Embodiment 1 of this invention. It is a top view which shows the vertical projection surface of FIG. 1 by Embodiment 1 of this invention. It is a front view which shows the pit entrance / exit apparatus of the elevator by Embodiment 2 of this invention. FIG. 4 is a plan view (cross section AA) showing the vertical projection plane of FIG. 3 according to Embodiment 2 of the present invention. FIG. 4 is a plan view (cross section BB) showing the vertical projection plane of FIG. 3 according to Embodiment 2 of the present invention. It is a front view which shows the form of the other pattern which comprises the principal part by Embodiment 2 of this invention. It is a front view which shows the form of the other pattern which comprises the principal part by Embodiment 2 of this invention. It is a front view which shows the form of the other pattern which comprises the principal part by Embodiment 2 of this invention. It is a front view which shows the pit entrance / exit apparatus of the elevator by Embodiment 3 of this invention. It is a top view which shows the vertical projection surface of FIG. 9 by Embodiment 3 of this invention. It is a front view which shows the pit entrance / exit apparatus of the elevator by Embodiment 4 of this invention. It is a top view which shows the vertical projection surface of FIG. 11 by Embodiment 4 of this invention.

Embodiment 1 FIG.
1 and 2 illustrate a pit exit / entry device according to Embodiment 1 of the present invention. FIG. 1 is a front view showing a pit entrance / exit device in which the pit entrance / exit device is disposed on the back of the guide rail. FIG. It is a top view which shows the 1 vertical projection surface. Note that ropes, hoisting machines, speed governors, control panels, and the like are omitted from the elevator hoistway equipment.

The hoistway 1 is provided with a landing 2 and a car 3 as an elevating body, and guide rails 4 a and 4 b for guiding the car 3 for raising and lowering the car 3 in the hoistway 1 are provided on both sides of the car 3. ing. On the vertical projection plane in the hoistway 1, the landing 2 and the guide rails 4 a and 4 b for guiding the car 3 are provided within a predetermined range. On one side of the side surface of the car 3, there is provided a balancing weight 5 which is a lifting body that moves up and down in the opposite direction. A rope (not shown) for raising and lowering the lifting body is wound around the balance weight 5 on one side and is wound around a suspension wheel 6 provided at the lower part of the car 3, and is arranged by 2: 1 roping. The car 3 is moved up and down in the road 1.

A pit exit / entry device 8 used to enter / exit into the pit 7 of the hoistway 1 from the landing 2 is provided on the back surface of the guide rail 4a and has a plurality of treads 9 that are installed at intervals in the vertical direction. is doing. The guide rail 4a is a car rail provided on the counterweight 5 side in the hoistway 1. The tread board 9 is fixed to the back surface of the guide rail 4a so as to intersect the vertical direction of the guide rail 4a on the horizontal projection surface in the hoistway 1. The step board 9 is extended to the landing 2 side and the counter landing 2 side as seen from the guide rail 4a intersecting in the vertical projection plane, and the end of the guide rail 4a where the step board 9 and the guide rail 4a intersect each other. The length from the portion to the end of the tread 9 that extends toward the anti-guide rail 4a is arranged equal to or greater than the foot width.

Next, the operation of the first embodiment configured as described above will be described. In order to get in and out of the pit 7 from the landing 2, the car 3 is stopped on the floor above the landing 2 and the door (not shown) of the landing 2 is opened. An operator puts his hand on the tread board 9 at a height that can be reached in a posture standing near the landing sill (not shown) on the hoistway 1 side of the landing 2 so that the body does not fall into the hoistway 1. The entire body is moved to the pit entry / exit device 8 while keeping one foot on the tread board 9 that is high enough to reach one foot without being overwhelmed. After moving to the pit entrance / exit device 8, the worker goes up and down the pit 7 along the tread board 9. After the work in the pit 7 is completed, the operator returns from the pit 7 to the landing 2 using the pit entrance device 8 in a procedure reverse to the procedure of moving from the landing 2 into the pit 7.

As described above, according to the first embodiment, in the pit entrance / exit device 8 that is installed in the hoistway 1 and is used to enter / exit into the pit 7 of the hoistway 1 from the landing 2, it is spaced apart from each other in the vertical direction. A plurality of treads 9 are installed, and a landing rail 2 and a guide rail 4a for guiding a car 3 as a lifting body on a vertical projection plane in the hoistway 1 are provided within a predetermined range, and Each tread 9 is fixed to the back surface of the guide rail 4a so as to intersect the vertical direction of the guide rail 4a on the horizontal projection plane in the road 1, and the end of the guide rail 4a where the tread 9 and the guide rail 4a intersect. To the end of the tread 9 extending to the side opposite to the guide rail 4a is equal to or longer than the foot width, so that the pit access device stored in the hoistway 1 can be used. Preparation When you do not use the pit entry / exit device, you can use the pit entry / exit device 8 from the hall 2 as it is without having to store it in the hoistway 1, so you can use the elevator pit entry / exit device with high safety and convenience. realizable. Moreover, since the pit entrance / exit device 8 is always installed in the hoistway 1 so as not to interfere with the elevator equipment, confirmation of the storage state and mechanical or electrical sensors can be dispensed with.

Embodiment 2. FIG.
3 to 5 illustrate a pit exit / entry device according to Embodiment 2 of the present invention. FIG. 3 is a front view showing an essential part, and FIG. 4 is a plan view showing a vertical projection plane of FIG. FIG. 5 is a plan view (cross section BB) showing the vertical projection plane of FIG. 6 to 8 are front views showing other patterns constituting the main part according to the second embodiment of the present invention. The elevator pit entry / exit device according to the second embodiment of the present invention includes a column 10 that supports a plurality of treads 9 in the vertical direction at intervals, or to fix the guide rail 4a to the hoistway 1 wall. The rail bracket 10 is arranged in a part of the pit entry / exit device 8, and the same symbols are added to the other similar parts, and the description is omitted.

3 to 5, the pit entrance / exit device 8 is provided with struts 10 that are supported at both ends of a plurality of treads 9 at intervals in the vertical direction. The pit entrance / exit device 8 has a necessary rigidity as a plurality of treads 9 are coupled to each other by a column 10. A rail bracket 11 for fixing the guide rail 4 a to the wall of the hoistway 1 is arranged at a part between the upper and lower sides of the plurality of treads 9.

The rail bracket 11 has a weight side guide rail 12a fixed to one end, a weight side guide rail 11b fixed to the other end, and a cage side guide rail 4a fixed to an intermediate portion. That is, the cage side guide rail 4a is fixed to the hoistway 1 wall through the rail bracket 11 and the weight side guide rails 12a and 11b.

The support column 10 is arranged in contact with or close to the rail bracket 11 so as to intersect the horizontal direction, and is fixed to the rail bracket 11 by welding or bolts. The rail bracket 11 is provided so that it can be used also as a tread 9 while fixing the guide rail 4a to the hoistway 1 wall.

Here, the rail bracket 11 is integrally formed, and is independently fixed to the hoistway 1 wall without depending on the rigidity of the pit access device 8. That is, since the rail bracket 11 does not depend on the rigidity of the pit entry / exit device 8, the column 10 need not be provided as shown in FIGS.

In FIG. 6, the tread 9 is fixed to the back surface of the guide rail 4 a, and extends from the position where the guide rail 4 a is fixed on the vertical projection surface to both the landing side and the opposite landing side, so that it can be used as the rail bracket 11. It is provided. Here, the tread board 9 is a pattern applicable when the hoistway device 1 does not interfere with the hoistway device.

In FIG. 7, the tread plate 9 is fixed to the back surface of the guide rail 4a, and is provided to extend only on the landing side from the position where the guide rail 4a is fixed on the vertical projection plane. Here, the tread board 9 is a pattern applicable when it interferes with a hoistway device on the side opposite to the landing in the hoistway 1.

In FIG. 8, the rail bracket 13 is provided in a divided structure, and is not directly fixed to the back surface of the guide rail 4 a, and the guide rail 4 a is fixed to the hoistway 1 wall through the support column 10. The rail bracket 13 has a weight side guide rail 12a or 12b fixed to one end, and a column 10 fixed to the other end. That is, the cage side guide rail 4a is fixed to the hoistway 1 wall via the pit entrance / exit device 8, the rail bracket 13, and the weight side guide rail 12a or 12b. In the pit entrance / exit device 8, a part of the tread plate 9 is fixed to the back surface of the guide rail 4a. Here, since the rail bracket 13 is fixed to the guide rail 4 a via the support column 10, it is fixed to the hoistway 1 wall depending on the rigidity of the pit access device 8.

3 to 5, the pit entrance / exit device 8 is arranged to be used as the tread 9 by fixing the support column 10 to the rail bracket 11, but may be fixed by other means. For example, a mounting tool (not shown) having an arm extending in the horizontal direction in a part of the support column 10 and a downward L-shaped mounting portion at the tip of the arm is provided. In the vicinity of the back surface of the guide rail 4a, this downward L-shaped attachment portion is hooked on the rail bracket 11 from above to fix the pit entrance / exit device 8. In this case, the rail bracket 11 and the pit entrance / exit device 8 are provided separately.

Next, since the operation of the second embodiment configured as described above is the same as that of the first embodiment, a description thereof will be omitted. As described above, according to the second embodiment, the pit is fixed in the end portion of the tread 9 and is provided with the struts 10 that support the plurality of treads 9 at intervals in the vertical direction. The entry / exit device 8 requires a special design, but the pit entry / exit device 8 has the same shape as a general ladder, so that the special design is not required, which is advantageous for cost reduction.

Further, by arranging a rail bracket 11 for fixing the guide rail 4a to the wall of the hoistway 1 between the upper and lower sides of the tread plate 9, the rail bracket 11 is also used as the tread plate 9, and the pit entrance / exit device 8 is connected to the guide rail 4a. By being able to be used as a means for fixing to the back, it is advantageous for sharing parts and saving space. Furthermore, since the pit entry / exit device 8 does not require a load other than the worker going up and down, there is no need to increase the rigidity of the pit entry / exit device 8, so that a general ladder can be applied as the pit entry / exit device 8, which is advantageous for cost reduction. Become.

Further, by fixing the support column 10 to the rail bracket 13, the rail bracket 13 is divided and attached to the pit entrance / exit device 8, which eliminates the need for an integrated design like the rail bracket 11. In addition, layout design for avoiding interference with hoistway equipment can be facilitated even during renovation work, and the degree of freedom in design can be increased.

Embodiment 3 FIG.
9 to 10 illustrate a pit exit / entry device according to Embodiment 3 of the present invention. FIG. 9 is a front view showing a main part, and FIG. 10 is a plan view showing a vertical projection plane of FIG. The elevator pit exit / entry device according to Embodiment 3 of the present invention is different in that the tread plate 9 or the support column 15 is arranged in the vertical projection plane of the rail bracket 14, and the same symbols are added to the other similar parts and the explanation is made. Omitted.

In the figure, the pit entry / exit device 8 is provided with struts 15 that are supported on the both ends of a plurality of treads 9 at an interval in the vertical direction. The support column 15 is provided in a vertically divided structure, and one end is fixed to the tread plate 9 and the other end is fixed to the rail bracket 14. The plurality of treads 9 are connected to each other by the support columns 15 so that the pit entrance / exit device 8 has a required rigidity. A rail bracket 14 for fixing the guide rail 4 a to the wall of the hoistway 1 is arranged at a part between the upper and lower sides of the plurality of treads 9.

The rail bracket 14 has a weight side guide rail 12a fixed to one end, a weight side guide rail 12b fixed to the other end, and a cage side guide rail 4a and a column 15 fixed to an intermediate portion. That is, the cage side guide rail 4a is fixed to the hoistway 1 wall through the rail bracket 14 and the weight side guide rails 12a and 12b.

The tread board 9 or the support column 15 is disposed so as to overlap the vertical projection plane of the rail bracket 14. The rail bracket 14 is provided so that it can be used also as the tread board 9 while fixing the guide rail 4a to the wall of the hoistway 1. Here, the rail bracket 14 is integrally formed, and is independently fixed to the wall of the hoistway 1 without depending on the rigidity of the pit access device 8.

Next, since the operation of the third embodiment configured as described above is the same as that of the first embodiment, a description thereof will be omitted. As described above, according to the third embodiment, the layout on the vertical projection plane of the pit access device 8 can be made compact by arranging the tread board 9 or the support column 15 in the vertical projection plane of the rail bracket 14. Not only in the renovation work, layout design to avoid interference with hoistway equipment becomes easier and the versatility of the design can be improved.

Embodiment 4 FIG.
11 to 12 illustrate a pit exit / entry device according to Embodiment 4 of the present invention. FIG. 11 is a front view showing a main part, and FIG. 12 is a plan view showing a vertical projection plane of FIG. The elevator pit entrance / exit device according to Embodiment 4 of the present invention is different in that one side of the tread plate 16 is disposed on the landing 2 side with respect to the back surface of the guide rail 4a on the vertical projection plane, and is the same as other similar parts. Symbols are added and description is omitted.

A pit exit / entry device 8 used to enter / exit into the pit 7 of the hoistway 1 from the landing 2 is provided on the back surface of the guide rail 4a, and has a plurality of treads 15 installed at intervals in the vertical direction. is doing. The tread board 16 is fixed to the back surface of the guide rail 4a so as to intersect the vertical direction of the guide rail 4a on the horizontal projection surface in the hoistway 1. The step board 16 is extended to the landing 2 side and the counter landing 2 side as seen from the intersecting guide rails 4a. The length from the end of the guide rail 4a where the tread 16 and the guide rail 4a intersect to the end of the tread 16 extending toward the anti-guide rail 4a is equal to or greater than the foot width. .

The front end of the tread 16 extending toward the landing 2 is bent at a predetermined position, and is disposed closer to the landing 2 than the back of the guide rail 4a on the vertical projection plane. In addition, although the support | pillar 10 is provided in the figure, when the tread 16 is fixed to the back surface of the guide rail 4a and the rigidity of the pit entrance / exit device 8 is ensured, the support | pillar 10 does not need to be provided.

Next, since the operation of the fourth embodiment configured as described above is the same as that of the first embodiment, a description thereof will be omitted. As described above, according to the fourth embodiment, the front end of the tread 16 extending to the landing 2 side is arranged on the landing 2 side of the back surface of the guide rail 4a on the vertical projection plane. When the distance from the entry / exit device 8 is long, the tip of the tread plate 16 can be brought close to the landing 2, so that the operator can use the pit entry / exit device 8 safely.

1 hoistway, 2 landings, 3 cages, 4a, 4b guide rails, 5 balancing weights, 6 suspension vehicles, 7 pits, 8 pit entry / exit devices, 9, 16 treads, 10, 15 struts, 11, 13, 14 rail brackets , 12a, 12b Weight-side guide rail

The present invention relates to an elevator pit entry / exit device for an operator to enter / exit a hoistway pit.

Claims (6)

A pit access device installed in a hoistway and used for entering and exiting from the landing to the pit of the hoistway, the pit access device having a plurality of treads installed at intervals in the vertical direction, the hoistway The platform and the guide rail that guides the lifting body are provided within a predetermined range on the vertical projection plane, and the treads intersect the vertical direction of the guide rail on the horizontal projection plane in the hoistway. The length from the end of the guide rail that is fixed to the back surface of the guide rail or in the vicinity thereof and intersects the step board and the guide rail to the end of the step board that extends to the anti-guide rail side Is an elevator pit entry / exit device characterized in that it is arranged at or above the foot width.
The elevator pit entry / exit device according to claim 1, further comprising a support column fixed to an end portion of the tread plate and supporting the plurality of tread plates in the vertical direction at intervals.
3. The elevator pit entrance and exit device according to claim 1, wherein a rail bracket for fixing the guide rail to the hoistway wall is disposed between upper and lower sides of the tread.
The elevator pit entry / exit device according to claim 2, wherein the column is fixed to the rail bracket.
The elevator pit entrance / exit device according to claim 3, wherein the step board or the support column is disposed in a vertical projection plane of the rail bracket.
The elevator pit entrance / exit according to any one of claims 1 to 5, wherein a front end of the tread extending to the landing side is disposed on a landing side with respect to a rear surface of the guide rail in a vertical projection plane. apparatus.

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