JP2019081636A - Ladder apparatus for elevator pit - Google Patents

Abstract

To provide a ladder apparatus for an elevator pit that solves problems in which when maintenance and inspection of a device placed in an elevator hoistway is performed, a stepladder dimensioned to be stored in a pit may not be sufficiently high depending on a location of the device, and especially for a main device, workability of the maintenance and inspection is poor if an access cannot be reliably made right in front of the main device, and it is dangerous to take an unusual position to perform the maintenance and inspection.SOLUTION: A ladder apparatus for an elevator pit comprises a support unit 2 fixed to a floor 1 of the pit and a ladder 3 detachably attached to the support unit 2. By fixing the support unit 2 of the ladder 3 to the floor 1 of the elevator pit beforehand, the ladder 3 can be reliably arranged in a standing condition at a necessary location.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a ladder device for erecting from the floor of a pit during maintenance and inspection of an elevator.

  Along with the times, it is required to reduce the portion occupied by an elevator in a building, and for this purpose, for example, equipment conventionally installed in a machine room is installed inside a hoistway.

  When installing the equipment inside the hoistway, one method is to install it at the bottom of the hoistway in consideration of the workability at the time of maintenance inspection, but the equipment inside the pit has a risk of flooding. Therefore, it is desirable that the main equipment inside the hoistway be installed above the floor of the lowest floor.

  The equipment installed above the floor of the lowest floor may be out of reach when a maintenance worker (hereinafter referred to as a worker) gets down to the elevator pit. Therefore, there is a need for a method that can access the equipment only during maintenance and inspection. For example, it is conceivable to use ladders or stepladders to reach a level close to the equipment. Patent Document 1 below introduces a method of fixing a ladder to a rail.

Japanese Utility Model Publication No. 04-024576

  A stepladder sized for storage in the elevator pit may not be sufficiently tall depending on the location of the equipment. In addition, particularly with respect to major devices (for example, control panels etc.), maintenance operability deteriorates if they can not be accessed directly in front of them, and it is dangerous if maintenance is performed in an unreasonable posture. In Patent Document 1 described above, although the ladder and the core of the rail are in the same positional relationship, most of the devices are installed beside the rail, so the worker who climbs on the ladder leans over for maintenance It will be checked.

  The elevator ladder apparatus according to the present invention comprises a support fixed to the floor of the pit and a ladder which can be detachably attached to the support.

  In addition, the support portion has a bottom portion, and one end rotatably pivoted on the bottom portion, and has a support that can be inclined substantially parallel to the floor of the pit, and the ladder is attached to and removed from the support The structure may be freely attached.

  Further, the longitudinal end portions of the ladder and the upper end of the support portion are provided with cuts to be fitted to the respective tread bars, and the slits are fitted to the tread bars to thereby achieve the aforementioned The structure may be such that a ladder can be attached to the support.

  Moreover, when attaching the said ladder to the said support part, the length of the said notch provided in the said support part may differ with the said ladder.

  The ladder may have a shape symmetrical in the longitudinal direction.

  The ladder may have a structure in which a plurality of unit ladders are provided, and the unit ladders can be assembled detachably.

  Moreover, the cut | disconnection fitted with each tread bar part is provided in the longitudinal direction both ends of the said ladder, and the said ladder can be attached or detached freely by fitting the said cut into the tread bar part. And the lengths of the cuts provided in the unit ladders may be different.

  Further, at least one of the plurality of unit ladders may have a shape symmetrical in the longitudinal direction.

  By fixing the support of the ladder in advance to the floor of the elevator pit, the ladder can be erected securely and easily where it is needed. Furthermore, when the ladder is unnecessary, the ladder can be removed and stored so as not to hinder the operation or maintenance of the elevator.

FIG. 2 is a schematic view of a ladder device for pits and its periphery in the present invention. It is a side view of FIG. It is a front view which concerns on the 1st Example of this invention. It is a front view (when open) of a support part concerning a 2nd example of the present invention. It is a front view (when folded) of a support part based on the 2nd Example of this invention. It is a side view of a supporter concerning a 2nd example of the present invention. It is a side view of a ladder concerning the 2nd example of the present invention. It is a figure which attached the ladder of FIG. 7 to the support part of FIG. It is XX sectional drawing of FIG. It is a side view concerning a 3rd example of the present invention. It is an example of another form of a ladder. It is an example of another form of a support part.

  Hereinafter, an embodiment of the present invention will be described based on the drawings. In addition, the dimensional ratio of each drawing and the actual dimensional ratio do not necessarily correspond. Also, the dimensional ratios among the drawings do not necessarily match.

  FIG. 1 and FIG. 2 show an overview of a ladder for pits and the periphery thereof. The device 101 is fixed to the wall 102 of the hoistway. Further, the support portion 2 is fixed to the floor 1 of the pit, and the lower portion of the ladder 3 is attached to the support portion 2. The upper portion of the ladder 3 is connected to a work table 103 fixed to the wall 102 of the hoistway. The work table 103 is installed at a position where a worker can easily maintain the device 101, and the position of the support portion 2 is determined so that the ladder 3 can be erected at a position where it is easy to get on and off the work table 103. The device 101 and the work bench 103 may be supported by rails or the like. The ladder 3 may bear against each other with the work table 103 or may be supported at the top in another way.

  FIG. 3 shows the details of the ladder. The support portion 2 is composed of two columns 21 and a bottom 22. The ladder 3 is configured of two columns 31 and a plurality of treads 32. By fixing the support 21 of the support 2 and the support 31 of the ladder 3 with the four fixing parts 4 at the top, bottom, left, and right (example: bolt fastening), preventing the ladder 3 from falling off the support 2 and falling it can.

  FIGS. 4 and 5 are views in the case where the support 21 of the support portion 2 can be inclined substantially parallel to the floor 1 of the pit. As described above, in order to fix the support 21 and the support 31 at the four positions vertically and horizontally, the support 21 needs to have a certain length, but the portion protruding from the pit floor 1 is subjected to maintenance inspection and storage of articles. And may cause workers to fall. As shown in FIG. 4, the support 21 and the bottom 22 are rotatably connected to each other at the fulcrum 23, and the support 2 is folded as shown in FIG. 5 except when the ladder 3 is attached. Since the height of the portion 2 is almost the same as the height of the bottom portion 22, these defects can be alleviated to a large extent.

  FIG. 6 is a view in the case where a notch 21A is provided at the upper end portion of the support 21 of the support portion 2 and a protrusion 21B having a cross-sectional shape similar to that of the tread is provided on the lower side. Moreover, FIG. 7 is a figure at the time of providing the notch | incision 31A in the both ends of the support | pillar 31 of the ladder 3. FIG. Furthermore, the end of the tread 32 of the ladder 3 is projected to the outside of the column 31.

  As shown in FIGS. 8 and 9, the ladder 3 is attached to the support portion 2 without using a tool or the like by fitting the notch 21A to the protrusion of the step bar 32 and the notch 31A to the protrusion 21B. be able to.

  With regard to the support portion 2, by providing the projecting portions 21 </ b> B separately on the two columns 21 instead of connecting the columns 21 with each other with the treads, the columns 21 can be turned down as shown in FIG. 5. Further, by forming the projecting portion 21B into the same cross-sectional shape as the tread 32, the notches 21A and 31A can also be formed into the same shape.

  In the present embodiment, as shown in FIGS. 4 and 5, the protrusion 21B is provided on each of the columns 21. However, steps similar to the steps 32 of the ladder 3 are provided between the columns 21. , And may be engaged with the notches 21A of the ladder 3.

  Further, as for the ladder 3, as in the case of the support portion 2, a protrusion having the same cross-sectional shape as the tread 32 is provided at a position closer to the longitudinal direction end than the tread 32 and fitting with the notch 21A It may be a department. By this, the overlapping part of the ladder 3 and the support part 2 can be shortened, and weight reduction of the ladder 3 can be achieved. As described above, since it is desirable that the treads and the projecting portions have similar shapes, they are collectively referred to as “the tread portions”.

  Ladder 3 can assemble unit ladders by dividing | segmenting into several unit ladders. Thereby, the ladder 3 of the length necessary for access to the equipment in the hoistway at the time of maintenance inspection is laid on the floor 1 of the pit when not in use or suspended on the pit wall (not shown). It can be divided into storable lengths. The unit ladders may have the ends shown in FIG. 7 or may be connected in other ways. In the case of the fitting, as described above, the fitting portion of the unit ladder may be provided separately from the step.

  When the support portions 2 and the notches 21A, 31A of the ladder 3 have different lengths, assembling work becomes easy. Furthermore, the same applies to the cut of the end of the unit ladder. The case of connecting two ladders 5, 6 is taken as an example and is shown in FIG. The unit ladder 5 is composed of two columns 51 and a plurality of treads 52, and a notch 51A is provided at an end of the column 51. The unit ladder 6 is composed of two columns 61 and a plurality of treads 62, and a notch 61A is provided at the end of the column 61. The cut 61A is longer than the cut 51A. The ladder 5 may be provided with a protrusion (not shown) having a similar shape to the tread 52. Similarly, the ladder 6 may be provided with a protrusion (not shown) having a similar shape to the step 62.

  In order to connect the ladders, first, the step bar 52 is hooked on the longer notch 61A, and then the short step 51A is hooked on the step via 62 to be fitted. Holding the hand near the center of a long component such as a ladder (closer to the center of gravity) makes it difficult to align the end far from the hand with another component. There is no need to align at the same time, and further, if the upper two places are taken first, the lower two places can be easily aligned. When the cut 61A is shorter than the cut 51A, the hooking order is reversed. In addition, it is good also as a shape which uses said protrusion part instead of the tread 52 and the tread 62.

  The ladder 3 can be assembled without considering the difference between the upper and the lower by making it longitudinally symmetrical. This generally improves the workability in the pit where the working space is small and there may not be sufficient lighting equipment. Even when the ladder 3 is divided into a plurality of unit ladders, the workability is similarly improved if the unit ladders have a shape symmetrical in the longitudinal direction.

  The present invention can also be carried out in variously modified, modified or modified forms based on the knowledge of those skilled in the art without departing from the scope of the invention. Moreover, you may implement in the form which substituted any invention specific matter to the other technique in the range to which the same effect | action or effect arises.

  The ladder in each embodiment is described as having two columns, one on the left and one on the right, but each of the left and right columns may have a structure in which two or more members are combined. An example is shown in FIG.

  The ladders in each embodiment and the treads engaged with the notches in the support portions are represented by a cylindrical shape in the drawing, but may be another shape such as a prism.

  Although the bottom of the cut in the end of the ladder and the support in each embodiment is expressed as a semi-circle in the figure, it may be shaped so as to have a corner, and is not necessarily the same shape as the fitting tread. It is also good.

  The assembly of the ladder and the support in each embodiment is such that the ladder is in the inside of the support in the figure, but the support may be in the inside of the ladder.

  The ladder and the support in each embodiment are assembled by fitting only, but may be further fastened by bolts. Moreover, you may assemble only by bolt fastening.

  Although the support portion in the above embodiment is configured to be folded inward in the drawing, it may be configured to be inclined outward or in a direction orthogonal to the bottom portion 22. Moreover, when making it the structure which falls in the direction orthogonal to the bottom part 22, it is good also as a shape which connected the support | pillar 21 of the right and left of a support part by the connection part 24 as an example was shown in FIG.

Reference Signs List 1 pit floor 2 support 21 support 21A notches 21B protrusion 22 bottom 23 support 24 support 24 ladder 3 ladder 31, 51, 61 support ladders 31A, 51A, 61A notches 32 , 52, 62 treads 4 fixed parts 5, 6 units ladder 101 equipment 102 hoistway wall 103 work bench

Claims (8)

A support fixed to the floor of the elevator pit,
It comprises a ladder which can be removably attached to the support part,
Elevator ladder device. The support portion is
At the bottom,
It has a post pivotally hinged at one end to the bottom and can be turned substantially parallel to the floor of the pit;
The ladder can be removably attached to the post,
An elevator pit ladder according to claim 1. Both longitudinal end portions of the ladder and the upper end of the support portion are provided with notches that engage with the respective treads,
The ladder can be attached to the support portion by fitting the cut into the tread portion.
An elevator pit ladder apparatus according to claim 1 or 2. When attaching the ladder to the support,
The length of the cut provided in the support portion is different from that of the ladder.
The elevator ladder apparatus according to claim 3. The ladder is longitudinally symmetrical in shape,
An elevator pit ladder apparatus according to any one of claims 1 to 4. The ladder comprises a plurality of unit ladders,
Said unit ladders can be assembled releasably,
An elevator pit ladder device according to any one of the preceding claims. Both longitudinal ends of the unit ladder are provided with cuts that mate with each other's tread bars,
By fitting the notches to the step bars, the unit ladders can be assembled detachably.
And the lengths of the cuts provided between the unit ladders are different,
An elevator pit ladder according to claim 6. At least one of said plurality of unit ladders being longitudinally symmetrical in shape,
An elevator pit ladder device according to any one of claims 6 or 7.

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