JPH1087207A - Elevator work ladder installing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set a ladder to be stable so as to improve work efficiency for a hoistway device by providing a pair of locking parts to be engaged with parts of the ladder with a space in the left and right sides of a frame having shoes engaged with the guide rail of a hoistway. SOLUTION: Two shoes 14 are attached to the center of the upper and lower ends of a frame 11 in a width direction by a shoe attaching metal fitting 12 fixed by a bolt 13. Shoe grooves 14a are provided in the shoes 14 so as to be engaged with a guide rail T-shaped in section. A pair of locking sections 15 for locking the side wood of a ladder are fixed to a side frame 11b at an interval. The locking sections 15 open/close the opening part of a carrier metal fitting 16 C-shaped in section by an opening/closing metal fitting 17 and lock the same by a locking metal fitting 18. The side wood is inserted into the inner side of the carrier metal fitting 16, the opening part is closed by the opening/ closing metal fitting 17, locked by the locking metal fitting 18 and thereby the ladder is fixed. The shoes 14 and the guide rail are engaged with one another via the shoe grooves 14a and, while sliding a ladder device upward along the guide rail, the ladder is fixed to be stable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder installation device for elevator work used when a ladder is installed in a pit for work such as maintenance of an overrun limit switch or an end point switch.

[0002]

2. Description of the Related Art FIG. 7 is an explanatory view showing an example of a state of work in a conventional elevator. In the figure, reference numeral 1 denotes a hoistway, and 1a denotes a pit formed at the bottom of the hoistway 1, that is, at a portion lower than the lowest floor 2 and is formed deeper to become a high-speed elevator. Reference numeral 3 denotes a pair of guide rails standing upright in the hoistway 1, reference numeral 4 denotes an intermediate beam for fixing an intermediate portion of the guide rail 3 to a wall of the hoistway 1, and reference numeral 5 denotes the inside of the hoistway 1 along the guide rail 3. , A hoistway device such as a row limit switch or an end point switch provided at the bottom of the hoistway 1, and a ladder 8 for maintenance work.

Next, the operation will be described. Pit 1a
Is deeper and the height from the floor of the pit 1a to the hoistway equipment 7 increases, the ladder 8 is used for maintenance work of the hoistway equipment 7.
Must be used. In such a case, first, the car 5 is stopped one floor above the lowest floor, and the operation mode is set to the maintenance work mode. Next, the landing door of the lowest floor landing 2 is opened, and the ladder 8 is inserted into the pit 1a. Then, using the ladder 8, the two workers M1 and M2 descend into the pit 1a.

[0004] Thereafter, a ladder 8 is leaned against the hoistway equipment 7 using the intermediate beam 4 or the like, for example. Then, while one worker M2 holds down the ladder 8, the other worker M1 climbs the ladder 8 and performs maintenance work on the hoistway equipment 7. After the work is completed, withdrawal work is performed in the reverse order.

[0005]

In the conventional maintenance work as described above, the hoistway equipment 7 to be subjected to the maintenance work is used.
If there is no wall or the like on which the ladder 8 can be stably stood in the vicinity of the ladder 8, the ladder 8 must be stood by using the intermediate beam 4 or the like. It is difficult, and it is necessary to hold down the ladder 8 by a worker M2 different from the worker M1 performing the maintenance work, and there is a problem that the working efficiency is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an elevator work capable of stably leaning a ladder and improving work efficiency for hoistway equipment. The purpose is to obtain a ladder installation device for use.

[0007]

According to a first aspect of the present invention, there is provided an elevator work ladder installation apparatus comprising: a frame; a shoe provided on the frame and engaging with a guide rail provided on a hoistway; And a pair of locking portions which are provided at right and left intervals and which lock a part of the ladder when the ladder is leaned in the pit of the hoistway.

In the ladder setting device for elevator work according to the second aspect of the present invention, the shoes can be exchanged according to the type of the guide rail.

According to a third aspect of the present invention, there is provided an elevator work ladder installation apparatus comprising: a C-shaped support bracket; an opening / closing bracket for opening and closing an open portion of the support bracket; and a lock for locking a closed state of the opening / closing bracket. This uses a locking portion having a metal fitting.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an elevator work ladder installation device according to an embodiment of the present invention,
FIG. 2 is a side view showing the device of FIG. 1 in a partial cross section, and FIG.
4, FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 3, FIG. 5 is a cross-sectional view showing a state where a ladder is installed in a pit by the apparatus of FIG. 1, and FIG. FIG. 7
The same or corresponding parts are denoted by the same reference numerals, and description thereof will be omitted.

In the drawing, reference numeral 11 denotes an outer frame 11a, a horizontal frame 11
b and a frame composed of a vertical frame 11c, 12
Are bolts 13 at the center in the width direction of the upper and lower ends of the frame 11.
Are two shoes attached to the frame 11 by the shoe attachments 12, respectively.
Are provided with shoe grooves 14a which engage with the guide rails 3 having a T-shaped cross section.

Reference numeral 15 denotes a pair of locking portions which are fixed to the horizontal frame 11b at an interval from each other and lock the crosspieces (footrests) 8a of the ladder 8. These locking portions 15 have a C-shaped cross section. A supporting member 16; an opening / closing member 17 rotatably attached to the supporting member 16 to open and close an opening 16a of the supporting member 16; and a lock member (for example, a hook and a tongue piece) for locking a closed state of the opening / closing member 17. ) 18.

Next, a maintenance work method for the hoistway equipment 7 will be described. In this example, first, the ladder 8 and the ladder setting device shown in FIG. 1 are carried into the pit 1a. Then, the footrest 8 a of the ladder 8 is inserted into the inside of the supporting bracket 16. Thereafter, the opening 16a of the supporting metal 16 is closed by the opening / closing metal 17 and the opening / closing metal 17 is locked by the lock metal 18.

When the ladder setting device is mounted on the ladder 8 in this manner, the heads of the guide rails 3 are fitted into the shoe grooves 14a of the upper and lower shoes 14, and the shoes 14 and the guide rails 3 are engaged. Then, the ladder 8 is set up while the ladder setting device is slid upward along the guide rail 3. At this time, if the ladder 8 is leaned, for example, at about 75 °, the ladder 8 is held in the horizontal direction by the left and right locking portions 15 and is held in the vertical direction by the upper and lower shoes 14, and twisting is prevented by the shoe grooves 14 a. Becomes stable. As described above, when it is confirmed that the ladder 8 is stable, the work on the hoistway device 7 may be performed by climbing the ladder 8. Also, withdrawal work
The procedure may be performed in the reverse order of the above.

According to such a ladder installation device, the ladder 8 can be stably stood by using the guide rail 3, and the work efficiency for the hoistway equipment 7 can be improved. In other words, the ladder 8 is stably stood at four points, that is, two points at the lower end and two points at the left and right locking parts 15. Further, the ladder 8 can be leaned on the guide rail 3 regardless of its length. Further, since the shoes 14 are arranged above and below the horizontal frame 11b to which the locking portions 15 are fixed, the stability of the ladder installation device with respect to the guide rails 3 is increased.

Further, the shoe 14 is a shoe mounting metal 1.
The shoe 14 can be easily exchanged by loosening the shoe mounting metal 12, which is attached to the frame 11 through the frame 2. Accordingly, only the shoe 14 can be easily changed from, for example, a medium T shoe to a small T shoe according to the type (shape, size, etc.) of the guide rail 3.

Further, since the locking portion 15 is provided with the opening / closing metal member 17 and the lock metal member 18 in addition to the supporting metal member 16, the locked state of the ladder 8 can be more securely held, and the safety is improved. The performance is improved.

The material of the components such as the frame 11 is not particularly limited. However, it is needless to say that the weight of the entire apparatus can be reduced by selecting a lightweight material, and the transportation can be facilitated. The device of the present invention can of course be applied to a case where a stepladder is extended and used as a ladder.

Further, by using a fixed portion in the pit 1a, for example, a guide rail 3 or a belt connecting the buffer (not shown) and the ladder 8, the stability of the ladder 8 can be further enhanced.

[0020]

As described above, the elevator ladder installation device of the first aspect of the present invention comprises a frame, a shoe provided on the frame and engaged with a guide rail provided on a hoistway, The ladder is provided with a pair of locking parts that are provided on the frame at left and right intervals, and a part of the ladder is locked when leaning the ladder in the pit of the hoistway, so that the ladder can be It can be stably stood, and the work efficiency for hoistway equipment can be improved. Further, the ladder can be leaned on the guide rail regardless of its length.

In the elevator ladder installation apparatus according to the second aspect of the present invention, the shoes can be exchanged according to the type of the guide rail, so that most of the equipment can be shared for all elevator operations. .

According to a third aspect of the present invention, there is provided a ladder installation device for elevator work, comprising a C-shaped support metal, an opening / closing metal for opening and closing an open portion of the support metal, and a lock metal for locking a closed state of the opening / closing metal. Since the locking portion having
The locked state of the ladder 8 can be more reliably held, and safety is improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a ladder installation device for elevator work according to an example of an embodiment of the present invention.

FIG. 2 is a side view showing the device of FIG. 1 in a partial cross section.

FIG. 3 is a rear view of FIG. 1;

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is a cross-sectional view showing a state where a ladder is installed in a pit by the apparatus of FIG.

FIG. 6 is an enlarged view of a main part of FIG. 5;

FIG. 7 is an explanatory view showing an example of a state of work in a conventional elevator.

[Explanation of symbols]

1 hoistway, 1a pit, 3 guide rails, 11
15 frames, 14 shoes, 15 locking parts, 16 support metal parts, 16a opening parts, 17 opening and closing metal parts, 18 lock metal parts.

Claims (3)

[Claims] 1. A frame, a shoe provided on the frame and engaging with a guide rail provided on the hoistway, and a ladder provided on the frame at a right and left distance and having a ladder in a pit of the hoistway. A ladder installation device for elevator work, comprising: a pair of locking portions for locking a part of the ladder when leaning against the ladder. 2. The ladder installation device for elevator work according to claim 1, wherein the shoes can be exchanged according to the type of the guide rail. 3. The locking portion has a supporting metal member having a C-shaped cross section, an opening / closing metal member for opening and closing an opening of the supporting metal member, and a lock metal member for locking a closed state of the opening / closing metal member. The ladder installation device for elevator work according to claim 1 or 2, wherein: