JP2003252543A - Ladder device for work in elevator shaft - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ladder device for a work in an elevator shaft always provided in a pit in a laid down position at ordinary time and easily arranged in a use position when necessary. <P>SOLUTION: The ladder 12 is always provided in a small storage space in a pit 2 in a laid down position at ordinary time. The ladder 12 is arranged in a erected used position rising upward from a retaining stand 11 or a separated use position in service. Consequently, it is not necessary to carry an exclusive step or the like in the pit 2 in every service in the elevator shaft and the ladder 12 can be temporally provided on a designated position with a simple operation in service. Accordingly, manpower for servicing is saved and working efficiency is improved. A problem that arrangement of elevator apparatus in the pit 2 is restricted by a space for always providing the pit 2 with the exclusive step or the like is solved. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder device for work in a hoistway of an elevator, which is always installed in a pit of the hoistway and mainly used for maintenance work.

[0002]

2. Description of the Related Art As a conventional ladder device for working in a hoistway of an elevator, there is a ladder device which is always installed in a pit and is normally folded and stored. Then, when necessary, the worker opens the door of the landing adjacent to the pit and pulls up the ladder to stand upright between the landing of the hoistway and the bottom of the pit. Then, it is used when a worker goes back and forth between the hall and the pit to perform maintenance work of elevator equipment such as a control panel installed in a hoistway such as the pit.

[0003]

In the conventional elevator hoistway work ladder apparatus as described above, another dedicated ladder, stepping board, etc. are provided in order to raise the worker to the work table provided in the pit. Need to use. For this reason, a dedicated ladder, stepping board, etc. will always be kept in the pit, and a storage space for keeping these stepping steps etc. in the pit is required.

Therefore, there are problems that the arrangement of the elevator equipment provided in the pit is restricted and the installation of the elevator equipment in the pit becomes difficult. Note that it is possible to bring in a step stool or the like in the pit every time maintenance work is performed, but this will require complicated steps such as transportation of the step stool.

The present invention has been made in order to solve such a problem, and an elevator which is always installed in a pit with a ladder always arranged in a lying position and can be easily arranged in a use position when needed. The purpose is to obtain a ladder device for working in a hoistway.

[0006]

In a ladder device for working in a hoistway of an elevator according to the present invention, a holding table provided in a pit of the hoistway and one end of which is connected to a hoistway of the hoistway and hangs down in the pit. The flexible strip, the support fitting whose one side is engaged with the edge of the landing, and the lower end of the flexible strip are connected at one end, and the other end is detachably engaged with the holding base to always It is placed in the lying position, and when necessary, it is raised from the holding base by the operation of the flexible strip and installed in the standing use position connected to the other side of the support bracket and detached from the holding base and mounted above the hoistway pit. And a ladder arranged at any of the separated use positions described above.

In the elevator hoistway work ladder device according to the present invention, a ladder is provided in which a plurality of ladder bodies are engaged with each other.

In the elevator ladder working apparatus according to the present invention, the first attaching / detaching mechanism for detachably engaging the end portions of the ladder body and the lower end of the ladder body forming the lower portion of the ladder body And a second attaching / detaching mechanism that detachably engages with the pit side.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 to 9 are views showing an example of an embodiment of the present invention. FIG. 1 is a cross-sectional plan view of an elevator hoistway, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. FIG. 4 is a right side view, FIG. 4 is a diagram for explaining a detached and used state of the ladder, and is a cross-sectional view taken along the line BB of FIG. 1, and FIG.
6 is an enlarged view of a C portion of FIG. 4, FIG. 7 is a side view of FIG. 6, FIG. 8 is an enlarged view of a D portion of FIG. 4, and FIG. 9 is a side view of FIG. In the figure, 1 is a hoistway of an elevator, 2 is a pit of the hoistway 1, and 3 is a landing which is opened in the hoistway 1 and arranged near the pit 2.

4 is a rail for a car standing upright in the hoistway 1 and spaced apart from each other, 5 is a rail for counterweights standing upright in the hoistway 1 and spaced apart from each other, 6 is a counterweight A counterweight that is guided by rails 5 and moves up and down,
7 is a hoist installed in the pit 2, 8 is a control panel mounted on the wall of the hoistway 1 above the pit 2, 9 is a folding work table, which is mounted on the wall of the hoistway 1 It is arranged on the lower side and is normally folded and arranged at a retracted position close to the wall surface of the hoistway 1.

Reference numeral 10 is a toe guard provided on the wall surface of the hoistway 1 from the lower edge of the hall 3, and 11 is a holding table provided in the pit 2. Reference numeral 12 is a ladder, one end of which is removably engaged with the holding base 11 and one end of which is the first ladder body 1.
The second ladder body 14 is detachably engaged with the other end of the third ladder body 14. Reference numeral 15 is a flexible strip formed of a chain, one end of which is connected to the toe guard 10 and hangs down in the pit 2, and the other end of which is connected to the second ladder body 14.

Reference numeral 16 denotes a first support metal fitting, one side of which is engaged with the edge of the landing 3 and the other side of which is engaged with the second ladder body 14 which is arranged in the standing use position. Reference numeral 17 denotes a ladder used for detachment, which is detached from the ladder 12 and mounted on the car rail 4, and 18 is a support base provided in the pit 2, with which the lower end of the first ladder body 13 detached from the holding base 11 is engaged. It Reference numeral 19 denotes a second support fitting, one end of which is pivotally attached to the wall side of the hoistway 1 and is normally arranged in the retracted position, and is engaged with the ladder 12 arranged in the standing use position when necessary.

Reference numeral 20 denotes a first attaching / detaching mechanism provided at a connecting portion between the first ladder body 13 and the second ladder body 14, and a connecting plate 22 having a recess 21 formed therein and attached to a longitudinal end of the first ladder body 13. ,
One end of the connecting plate 22 is pivotally attached to the connecting plate 22 and is disposed across the concave portion 21, and the other end is connected to the connecting plate 22 via a blunt hole 23.
A hook 25 that is fastened by a mounting screw 24, a connecting rod 2 that is provided so as to penetrate through the longitudinal end portion of the second ladder body 14 in the ladder width direction and that is fitted into the recess 21 of the connecting plate 22.
6 is provided.

The first attaching / detaching mechanism 20 has a first ladder body 1
3 is protruded from the end 131 facing the second ladder body 14 and faces the right side of the connecting rod 26 in FIG. 6 of the end 141 of the second ladder body 14 and is located below the connecting rod 26. Pin 132 is provided. This allows the pin 132
The rotation of the second ladder body 14 in the counterclockwise direction in FIG. 6 with respect to the first ladder body 13 is prevented. And
The first ladder body 13 and the second ladder body 14 are not bent by the load when the worker climbs onto the ladder 12, and are maintained in a straight line state.

Reference numeral 27 denotes a second attaching / detaching mechanism formed at the opposite end of the first ladder body 13 and the support base 18, that is, the member on the pit 2 side, and is a recess 28 formed in the support base 18, one end of which is on the support base 18. It is fastened by a fastening screw 29 and is recessed at the other end 28.
Of the retaining plate 31 provided with the fitting portion 30 facing each other and the longitudinal end portion of the first ladder body 13 so as to penetrate across the longitudinal end portion of the first ladder body 13 in the width direction of the ladder. The connecting rod 32 is fitted to the fitting portion 30.
Although not shown, a second attaching / detaching mechanism 27 is also provided between the holding table 11 and the first ladder body 13 facing the holding table 11.

In the elevator hoistway work ladder device configured as described above, the ladder 12 is always held by the holding table 11, and is folded and arranged in a lying state as shown by the solid line in FIG. . Further, the folding workbench 9 is folded and placed at a retracted position close to the wall surface of the hoistway 1 as shown by a chain line in FIG. Then, the elevator is normally operated in such a state.

Therefore, normally, the ladder 12 or the like can be always installed in the storage space with a small number of pits 2 and it is not necessary to carry in a dedicated stepping plate or the like, so that an elevator device provided in the pit 2 for a dedicated stepping plate or the like. It is possible to solve the problem that the arrangement of is restricted. Then, during the maintenance work of the pit 2 of the hoistway 1, the work ladder device in the hoistway of the elevator is used as described below.
That is, the operator pulls up the ladder 12 from the landing 3 through the flexible strip 15 as shown by the chain line in FIG.

In this state, the first ladder body 13 and the second ladder body 14 are extended so that the ladder 12 is placed from the lying position to the standing use position. Then, the first support fitting 16 is engaged with the second ladder body 14 so that the ladder 12 is fixedly erected at the edge of the hall 3, and the worker uses the ladder 12 to get down to the pit 2. As a result, maintenance work of the equipment installed in the pit 2, such as the hoisting machine 7, is performed.

Next, the ladder 12 is detached from the landing 3 side via the first supporting metal fitting 16 and is detached from the holding base 11 via the second attaching / detaching mechanism 27, and the lower end is attached to the supporting base 18 by the second attaching / detaching mechanism 27. Attach the upper support to the second support bracket 19
To support the ladder 12 on the wall side of the hoistway 1. In this state, as shown in FIG. 4, the ladder 12 is placed in the detachment use position. Then, using the ladder 12 in this state, the folding worktable 9 on which the worker is folded is arranged at the protruding position protruding from the wall surface of the hoistway 1.

Then, the worker puts the ladder 12 in the detached and used position.
A folding worktable 9 arranged at a protruding position is climbed up and maintenance work is performed on the equipment mounted on the wall of the hoistway 1 such as the control panel 8. Further, the second ladder body 14 of the ladder 12 is detached from the first ladder body 13 by the first attachment / detachment mechanism 20 and moved, and is appropriately mounted above the folding work table 9. As a result, maintenance work can be performed on the equipment mounted above the folding work table 9 by the moved ladder 12.

When the maintenance work is completed, a detailed description will be omitted, but the folding workbench 9 is performed in the reverse order of the above.
Is folded, and the ladder 12 is placed in the upright use position.
Then, the worker returns to the hall 3 and the work from the hall 3 restores the ladder 12 to the normal storage state in the pit 2. In this way, the ladder 12 is always installed in the pit 2 and is normally placed in the lying position, and the ladder 1 is placed in the use position when necessary.
2 can be easily arranged.

Therefore, it is not necessary to carry in a dedicated ladder, stepping board, etc. into the pit every time maintenance work is performed in the hoistway 1.
During maintenance work, the ladder 12 can be temporarily installed at a required position by a simple operation. As a result, the labor required for maintenance work can be saved and the work efficiency can be improved. Further, due to the storage space for always having another dedicated step stool or the like in the pit, it is possible to solve the problem that the arrangement of the elevator equipment provided in the pit is restricted or the installation of the elevator equipment becomes difficult.

Embodiment 2. 10 and 11 are views showing an example of another embodiment of the present invention, and FIG. 10 is a view for explaining a detached and used state of the ladder, which corresponds to FIG.
FIG. 11 is a right side view of FIG. It should be noted that, except for FIGS. 10 and 11, the ladder device for working in the hoistway of the elevator is configured similarly to the embodiment of FIGS. 1 to 9 described above.
In the figure, the same reference numerals as those in FIGS. 1 to 9 indicate corresponding parts.

The embodiment shown in FIGS. 10 and 11 is shown in FIGS.
The ladder 12 is used at a position where the ladder 12 or the like used in the embodiment of FIG. 9 is moved away from the position facing the car rail 4 toward the control panel 8. Also in the embodiment of FIGS. 10 and 11, the ladder 12 is detachably engaged with the holding table 11 and is normally disposed in the fall position, and is arranged in either the standing use position or the detachment use position as needed. To be done. Therefore, although detailed description is omitted, the same effects as those of the embodiments of FIGS. 1 to 9 can be obtained in the embodiments of FIGS. 10 and 11.

[0025]

As described above, according to the present invention, the holding table provided in the pit of the hoistway, the flexible strip having one end connected to the landing of the hoistway and hanging from the pit, and the one side of the landing One end is connected to the support fitting engaged with the edge of the flexible strip and the lower end of the flexible strip is detachably engaged with the holding base so that the other end is normally placed in the fall position, and the flexible strip is used when necessary. It is placed in one of the standing use position that is raised from the holding base by operation of the body and is connected to the other side of the support bracket, and the detaching use position that is detached from the holding base and is mounted above the pit of the hoistway. It is equipped with a ladder.

As a result, the ladder is normally arranged in the lying position, and the ladder can be always installed in the storage space with few pits. Further, during maintenance work, the ladder is detached from the standing use position and the holding stand which are erected upward from the holding stand. A ladder is placed at one of the detachment use positions. For this reason, it is not necessary to carry in a dedicated ladder, stepping board, or the like into the pit every time maintenance work is performed in the hoistway, and the ladder can be temporarily installed at a required position by a simple operation during maintenance work. As a result, the labor required for maintenance work can be saved and the work efficiency can be improved. In addition, there is an effect of solving the problems that the arrangement of elevator equipment provided in the pit is restricted or the installation of elevator equipment becomes difficult due to the storage space for always having a dedicated stepping board or the like in the pit.

Further, as described above, the present invention provides a ladder formed by engaging a plurality of ladder bodies with each other.

As a result, a ladder in which a plurality of ladder bodies are engaged can be always placed in the laid-down position, and the ladder can be always installed in the storage space with few pits. The ladder is arranged at either the standing use position or the detachment use position detached from the holding table. For this reason, it is not necessary to carry in a dedicated ladder, stepping board, or the like into the pit every time maintenance work is performed in the hoistway, and the ladder can be temporarily installed at a required position by a simple operation during maintenance work. As a result, the labor required for maintenance work can be saved and the work efficiency can be improved. In addition, there is an effect of solving the problems that the arrangement of elevator equipment provided in the pit is restricted or the installation of elevator equipment becomes difficult due to the storage space for always having a dedicated stepping board or the like in the pit.

Further, as described above, the present invention includes the first attaching / detaching mechanism for detachably engaging the ends of the ladder body with each other.
A second attaching / detaching mechanism that detachably engages the lower end of the ladder body, which constitutes the lower part of the ladder, with the pit side.

As a result, the ladder having a plurality of ladders engaged with each other and having the first attaching / detaching mechanism and the second attaching / detaching mechanism at the end thereof is always arranged in the laid-down position, and the storage with few pits is carried out. You can always have a ladder in the space. Further, during maintenance work, the ladder is arranged at either a standing use position that stands upright from the holding base or a separation use position that is separated from the holding base. For this reason, it is not necessary to carry in a dedicated ladder, stepping board, or the like into the pit every time maintenance work is performed in the hoistway, and the ladder can be temporarily installed at a required position by a simple operation during maintenance work. As a result, the labor required for maintenance work can be saved and the work efficiency can be improved. In addition, there is an effect of solving the problems that the arrangement of elevator equipment provided in the pit is restricted or the installation of elevator equipment becomes difficult due to the storage space for always having a dedicated stepping board or the like in the pit.

[Brief description of drawings]

FIG. 1 is a view showing a first embodiment of the present invention and is a cross-sectional plan view of an elevator hoistway.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a right side view of FIG.

FIG. 4 is a diagram for explaining a state in which the ladder is detached and used, and is a cross-sectional view taken along the line BB of FIG. 1.

5 is a right side view of FIG. 4.

FIG. 6 is an enlarged view of part C in FIG.

7 is a side view of FIG.

FIG. 8 is an enlarged view of part D in FIG.

9 is a side view of FIG.

FIG. 10 is a view showing the second embodiment of the present invention and is a view for explaining a detached and used state of the ladder and is a view corresponding to FIG. 4 described above.

11 is a right side view of FIG.

[Explanation of symbols]

1 hoistway, 2 pits, 3 halls, 11
Holding stand, 12 ladders, 13 first ladder body,
14 2nd ladder bodies, 15 flexible strips, 16 1st support metal fittings, 19 2nd support metal fittings, 20 1st attaching / detaching mechanism, 27 2nd attaching / detaching mechanism.

Claims (3)

[Claims] 1. A holding table provided in a pit of a hoistway,
One end is connected to the hoistway of the hoistway and hangs down in the pit, a support metal fitting is engaged with the edge of the landing on one side, and one end is connected to the lower end of the flexible ridge. The other end is detachably engaged with the holding table and is normally disposed in the laid-down position. When necessary, the flexible strip is operated to stand upright from the holding table and connected to the other side of the support fitting. Ladder device for working in a hoistway of an elevator, comprising: a standing use position and a ladder which is detached from the holding table and is placed at a detaching use position mounted above the pit of the hoistway. 2. The ladder device for working in a hoistway of an elevator according to claim 1, wherein the ladder is formed by engaging a plurality of ladder bodies with each other. 3. A first attaching / detaching mechanism for detachably engaging the ends of the ladder body with each other, and a second attaching / detaching mechanism for detachably engaging the lower end of the ladder body forming the lower part of the ladder with the pit side. The ladder device for working in a hoistway of an elevator according to claim 2, wherein the ladder device is provided.