JP3406173B2 - Ladder for elevator pit - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder for an elevator pit provided between the floor of the lowest floor of a hoistway and the bottom of the hoistway.

[0002]

13 to 15 show, for example, an actual flat plate 6-3.
FIG. 13 is a view showing a conventional elevator pit ladder disclosed in Japanese Patent No. 7261, FIG. 13 is a longitudinal sectional view conceptually showing the elevator, FIG. 14 is an enlarged view of part A of FIG. 13, and FIG.
4 is an enlarged sectional view taken along line BB of FIG. In the figure, 1 is a hoistway, 2 is a hall provided in the hoistway 1 apart from each other, 3 is a lowest floor hall provided in the hoistway 4, 4 is a floor of the lowest floor hall 3, 5 is a hoistway The bottom surface 6 is formed in the pit of the road 1.

A machine room 7 is provided above the hoistway 1,
8 is a hoist equipped with a drive sheave 9 installed in the machine room 7,
Reference numeral 10 is a control panel installed in the machine room 7, 11 is a car that moves up and down the hoistway 1, 12 is a counterweight that moves up and down the hoistway 1, 13 is a drive sheave 9 that is wound around the car 11 and The main ropes respectively suspending the counterweights 12, 14 is a rail for a car which is erected in the hoistway 1 to guide the car 11 up and down, and 15 is erected in the hoistway 1 to lift and lower the counterweight 12. It is a counterweight rail to guide you.

Reference numeral 16 denotes a car shock absorber which is erected on the bottom surface 6 and is disposed corresponding to the car 11. Numeral 17 is a counterweight which is erected on the bottom surface 6 and disposed corresponding to the counterweight 12. A shock absorber, 18 is a moving cable suspended between the hoistway 1 and the car 11, 19 is a tension wheel supported by the car rail 14 and arranged in the pit 5, and 20 is a device provided in the car 11. A landing device constituted by a plate arranged in the hoistway 1, and 21 is an end point switch constituted by a cam provided in the car 11 and a switch arranged in the hoistway 1.

22 is the entrance of the hall 2 or the lowest floor hall 3;
23 is a sill forming the lower edge of the doorway 22, 24 is a door for opening and closing the doorway 22, 25 is a hoistway 1 of the sill 23
It is a toe guard that extends downward from the side edge portion and is installed so that the horizontal direction corresponds to the width of the doorway 22. Two
Reference numeral 6 denotes a ladder, which is formed to have a width TW as shown in FIG. 15 and is provided between the lower side of the sill 23 and the bottom surface 6 of the hoistway 1 and corresponds to a door pocket of the door 24 of the hall of the lowest floor hall 3. The cross bars 27 are provided at positions and are spaced apart from each other in the vertical direction.

Reference numeral 28 is a sill forming the lower edge of the entrance / exit 29 of the car 11, 30 is an operator using the ladder 26 to enter and exit the pit 5 of the hoistway 1, and 31 is a toe of the shoe of the operator 30. Note that EE shown in FIGS. 14 and 15 is a dimension from the front end of the sill 28 of the car 11 to the car rail position, and V is an edge of the sill 23 of the lowest floor hall 3 from the wall of the pit 5 of the hoistway 1 to the car 11 side. Distance to the section, Cl is the threshold of the basket 11 28
And the sill 23 of the lowest floor hall 3, TD is the cage 11 on the side wall of the pit 5 from the hoistway 1 to the ladder 27 of the ladder 26
It is the protruding dimension to the front end in the lateral direction.

In the elevator as described above, the elevator pit ladder is conventionally constructed as described above, and the operator 3 uses the ladder 26 as described below.
0 goes in and out of the pit 5 of the hoistway 1, and maintenance and inspection work is performed in the pit 5. That is, the car 11 is stopped at the hall 2 above the lowest floor hall 3 by the maintenance operation. Then, the locking device (not shown) of the door 24 of the hall of the lowest floor hall 3 is unlocked and opened, and the worker 30 uses the frame of the doorway 22 and the inner wall of the hoistway 1 as a clue to cross the ladder 27 of the ladder 26. Stand up to, climb the ladder 26, descend and enter the pit 5.

In the elevators shown in FIGS. 13 to 15, the following conditions are required for the worker 30 to enter and exit the pit 5 of the hoistway 1. That is, a space through which the worker 30 can pass must be formed between the protruding end of the end point switch 21 and the inner wall of the hoistway 1 facing the protruding end.

Further, the above-mentioned distance V shown in FIGS. 14 and 15 is 120 mm or more, and the projecting dimension TD of the cross bar 27 is set so that the worker 30 can put on the cross bar 27 more than half of the toes 31 of the shoe. It is necessary to form 90 mm or more. Therefore, the arrangement of the ladder 26 as shown in FIGS. 13 to 15 is applied when the door type is a single-opening door or in a small capacity elevator having a relatively short EE size.

16 to 18 show, for example, Japanese Unexamined Patent Publication No.
FIG. 16 is a view showing another conventional ladder for an elevator pit similar to that shown in Japanese Patent Publication No. 113439, FIG. 16 is a longitudinal sectional view conceptually showing the elevator, FIG. 17 is an enlarged view of a C portion of FIG. 18 is a D-D line reduction sectional view of FIG. 17. In the figure, the same reference numerals as those in FIGS. 13 to 15 described above indicate corresponding parts, and 26 is a ladder whose upper end is arranged above the floor surface 4 of the lowest floor hall 3, and the car 11 such as the end point switch 21 or the like. It is provided at a position corresponding to the side surface of the car 11 where no accessory device is arranged, and is arranged near the entrance 22 of the lowest floor hall 3.

In the elevators shown in FIGS. 16 to 18, as in the case of the elevators shown in FIGS. 13 to 15, the worker 30 uses the ladder 26 to move the worker 30 in and out of the pit 5 of the hoistway 1. . The following conditions are required for the worker 30 to enter and exit the pit 5 of the hoistway 1 in the elevator shown in FIGS.

That is, the car 11 auxiliary equipment such as the end point switch 21 is not arranged on the side surface of the car 11 near the doorway 29, and the width TW dimension of the ladder 26 can be accommodated in the length of the side surface of the car 11 along the depth direction. is necessary. Therefore, the arrangement of the ladder 26 as shown in FIGS. 16 to 18 is applied to the case where the door type is a center-opening door or an elevator having a relatively long EE size and a medium capacity or more.

[0013]

In the conventional elevator pit ladder as described above, the distance V from the wall surface of the pit 5 of the hoistway 1 to the edge of the sill 23 of the lowest floor hall 3 on the side of the car 11 is short. In this case, the projecting dimension TD from the wall surface of the pit 5 of the hoistway 1 to the front end of the crossbar 27 of the ladder 26 in the car 11 side is reduced.

Therefore, there is a problem that it is difficult for the worker 30 to put shoes on the cross bar 27, and when the worker 30 descends from the floor surface 4 of the lowest floor hall 3 to the pit 5, it is difficult to see the ladder 26. It was The distance V is preferably short in order to improve the space efficiency in the floor area of the building where the elevator is installed.

The present invention has been made to solve the above problems, and provides an elevator pit ladder provided at the lowest floor hall so that an operator can easily get down to the hoistway pit. With the goal.

[0016]

In an elevator pit ladder according to the present invention, a hoistway for raising and lowering a car ,
It is placed between the bottom floor of this hoistway and the bottom of the hoistway, and stands upright along the wall of the hoistway and is placed in parallel with each other.
Placed vertical members , a plurality of horizontal bars arranged between these vertical members and spaced apart from each other in the upper and lower directions, and the bottom
Part of the cross-bar is formed, and one side is the horizontal projection surface of the hoistway.
A first step board which is arranged overhanging the definitive center side, bottom
The tread of the cross bar arranged on the cross bar of the part forms one side
It is placed so as to project to the center of the horizontal projection plane of the hoistway.
The overhang position is more than the overhang position of the first tread.
A second tread plate that is located near the wall of the hoistway and that faces the lower surface of the car with the tread surface lowered to the lowest position to form a gap.
Door is provided, et al. Are.

Further, in the ladder elevator pits according to the present invention, first fastened to the front of the rungs that corresponds
A first step board and a second step board are provided .

Further, in the elevator pit ladder according to the present invention, between the first tread and the corresponding cross bar and
Empty between the second tread and the corresponding horizontal bar
Distance piece constituting a gap is provided et the.

Further, in the elevator pit ladder according to the present invention, the upper surfaces of the first tread and the second tread are opposed to each other.
A vertical step is formed on the upper surface of the
The first and second treads are placed on the corresponding horizontal bar when placed.
It is installed .

[0020] In the ladder elevator pits according to the present invention, the lowest floor landing another provided on a wall surface crossbar laterally correspondence between the hoistway entrance has connected to the wall of the elevator path provided in There is provided a handle that is arranged at the above position, the longitudinal direction is arranged in the vertical direction, and the upper end is arranged above the floor surface of the lowest floor hall.

[0021] In the ladder elevator pits according to the present invention, grip a mounting portion configured to be inclined from the end of the grip portion is found respectively on the upper and lower ends in rather retreat far direction in the longitudinal gripping portion The handle is attached to the wall surface of the hoistway via this attachment portion.

Further, in the elevator pit ladder according to the present invention, the hoistway through which the car moves up and down, and the entrance of the lowest floor hall provided between the lowest floor hall of this hoistway and the bottom surface of the hoistway are provided. It is formed along the other wall surface of the hoistway connected to the wall surface of the hoistway, and is installed in the hoistway and the length is arranged in the up-down direction and is provided below the floor surface of the lowest floor hall. The vertical member that also serves as the switch box of the end point switch and one end is fastened to the car rail provided in the hoistway and the other end is fastened to the vertical member, which also serves as the switch box support and is separated from each other in the vertical direction. It is composed of arranged horizontal bars.

Further, in the elevator pit ladder according to the present invention, the ladder is composed of a vertical member whose upper end is arranged at least 1000 mm above the floor surface of the lowest floor hall, and a cross bar having an effective length of at least 250 mm. Is configured.

[0024]

DETAILED DESCRIPTION OF THE INVENTION

Embodiment 1. 1 to 6 are views showing an example of an embodiment of the present invention, FIG. 1 is a vertical sectional side view of a pit portion of an elevator hoistway, FIG. 2 is an enlarged plan view of FIG. 1, and FIG. FIG. 4 is an enlarged and partially exploded perspective view of the ladder, FIG. 4 is a view equivalent to FIG. 1 for explaining the usage state of the ladder of FIG. 1, FIG. 5 is an enlarged view of the main parts of FIG. 4, and FIG. 6 is the use of the ladder of FIG. 6 (a) to 6 (c) are side views and FIG. 6 (aa) to FIG.
(Cc) is a plan view. An elevator is configured similarly to the above-described FIGS. 16 to 18 except for FIGS. 1 to 6.

In the figure, 1 is a hoistway, 3 is the lowest floor hall provided in the hoistway 1, 4 is the floor of the lowest floor hall 3, and 5 is a pit of the hoistway 1 and a bottom surface 6 is formed. There is. Reference numeral 11 is a car that moves up and down the hoistway 1, 12 is a counterweight that moves up and down the hoistway 1, and 14 is a car rail that is erected on the hoistway 1 and that guides the car 11 up and down.

Reference numeral 15 is a rail for a counterweight which is erected on the hoistway 1 to guide the lifting of the counterweight 12, and 16 is a car shock absorber which is erected on the bottom surface 6 and is arranged corresponding to the car 11. , 17 are shock absorbers for the counterweight, which are erected on the bottom surface 6 and arranged corresponding to the counterweight 12.

Reference numeral 18 is a moving cable suspended between the hoistway 1 and the car 11, 19 is a tension wheel supported by the car rail 14 and arranged in the pit 5, and 20 is a device provided in the car 11. A landing device constituted by a plate arranged in the hoistway 1, and 21 is an end point switch constituted by a cam provided in the car 11 and a switch arranged in the hoistway 1.

22 is the entrance of the lowest floor hall 3, 23 is a sill forming the lower edge of the entrance 22, 24 is a door for opening and closing the entrance 22, 25 is a lower edge of the sill 23 on the side of the hoistway 1. It is a toe guard extended and installed in the horizontal direction corresponding to the width of the doorway 22. 28 baskets 1
A threshold that forms the lower edge of the entrance 29 of the door 1, a worker 30 who enters and exits the pit 5 of the hoistway 1 using a ladder described later, and 31 is a toe of the shoe of the worker 30.

A ladder 32 has a width TW, as shown in FIG.
It is formed to have a height TL and is provided between the lower side of the sill 23 and the bottom surface 6 of the hoistway 1 and is located at the hall 2 of the lowest floor hall 3.
It is arranged at the position corresponding to the door pocket of No. 4, and the vertical member 33 and the vertical member 3 are provided on both sides.
The cross bars 34 arranged between the three and vertically spaced apart from each other, the upper fitting 35 fastened to the upper ends of the vertical members 33 on both sides, and the horizontal direction are made longer than the upper fitting 35. Lower fixture 3 fastened to the lower ends of the vertical members 33 on both sides
6 is provided. Then, the upper mount 35 and the lower mount 3
6 is mounted on the wall surface of the pit 5.

Further, it is manufactured to have a depth depth D2 to form a main portion of the tread surface of the lowermost horizontal bar 34, and the lowermost horizontal bar 3 is formed.
First tread 37 and depth depth D2 mounted on the upper surface of No. 4
Lower depth crossbar 34 made to a depth D1 shallower than
An important part of the tread surface of the upper horizontal bar 34 is formed, and a second tread 38 mounted on the upper surface of the upper horizontal bar 34 is provided. Reference numeral 39 is a handle attached to the wall surface of the hoistway 1 corresponding to the end point switch 21 and arranged near the floor surface 4 of the lowest floor hall 3.

EE shown in FIGS. 1 to 6 is a dimension from the front end of the sill 28 of the car 11 to the car rail position, and V is the wall of the hoistway 1 pit 5 to the car 11 of the sill 23 of the lowest floor hall 3. Distance to the side edge, Cl is the sill 28 of the basket 11
TD1 is the hoistway 1 and the space between the sill 23 of the lowest floor hall 3
The protrusion size from the wall surface of the pit 5 to the front end of the ladder 32 toward the car 11 side is TD2, and the protrusion size TD2 from the wall face of the pit 5 to the front end of the ladder 32 toward the car 11 side at the bottom end of the ladder 32.

Further, PD is the depth of the pit 5, CT is the distance between the upper end of the ladder 32 and the floor 4, and Z is the bottom surface 6 when the car 11 is excessively lowered and the car buffer 16 is completely compressed and stopped. Distance, that is, the lowest position of the car 11, C2 is the gap between the tip of the sill 28 of the car 11 and the vertical member 33 of the ladder 32 in the lowest position, and C3 is the lower surface of the car 11 and the ladder 32 in the lowest position. It is a vertical gap with the second tread 38.

The elevator pit ladder constructed as described above is provided in the elevator, and the operator 30 uses the ladder 32 to make the hoistway 1 pit 5 as described below.
Going in and out, maintenance and inspection work is performed in the pit 5. That is, the car 11 is stopped at the hall 2 above the lowest floor hall 3 by the maintenance operation.

Then, the locking device (not shown) of the door 24 at the hall of the lowest floor hall 3 is unlocked and opened. Then, the worker 30 climbs up and down the ladder 32 using the frame of the doorway 22 and the handle 39 of the hoistway 1 as a clue, through the cross bar 34 of the ladder 32, the first tread plate 37 and the second tread plate 38, and descends to the pit 5.
To and from.

Since the lower end of the ladder 32 is provided so as to incline toward the center of the hoistway 1, the worker 30 can easily confirm the location of the ladder 32 from the lowest floor landing 3. You can In addition, the cross bar 34 is moved up and down in sequence as the edge of the cross bar 34 on the center side of the hoistway 1 or the edge of the hoistway 1 on the center side of the cross bar made up of the first tread 37 and the second tread 38 is arranged toward the lower part. It is installed overhanging on the center side of Road 1.

As a result, the worker 30 can move to the position shown in FIG.
As shown in (a) to (c) and (cc) of FIG. 6, shoes can be sequentially placed on each step of the crossbar 34 of the ladder 32 to easily climb and descend. 6 (a) (aa) to 6 (c) (c)
As shown in c), the width dimension TW of the ladder 32 is set to 250 to 350 mm so that the worker 30 can put the shoes on the crossbar 34 and the like. This allows the worker 30 to have a natural posture and the ladder 32
You can easily climb and descend.

Further, since the lower end of the ladder 32 is installed so as to incline toward the center of the hoistway 1, the cross bar 34,
The treads of the first tread 37, the second tread 38, etc. are arranged with the hoistway 1 wall surface inclined downward. Therefore, the cross bar 34
Since the worker 30 on the tread surface leans against the wall surface of the hoistway 1, the ladder 32 can be easily used.

Further, since the cross bar 34 arranged below the lowest descent position of the car 11 is provided with the first tread plate 37 and the second tread plate 38, FIG. 6 (b) (bb), FIG. 6 ( c)
As shown in (cc), a required space for the operator 30 to put the shoes on is formed. Therefore, the ladder 32 can be easily used.

In the state where the car 11 is stopped at the lowest position, the tip of the sill 28 of the car 11 and the vertical member 3 of the ladder 32 are arranged.
3 and a vertical gap C3 between the lower surface of the car 11 and the second step plate 38 of the ladder 32 is formed.
Therefore, even if the car 11 descends to the lowest position, the ladder 3
The respective parts of 2 do not come into contact with the car 11 and no trouble such as deformation of the ladder 32 occurs.

Embodiment 2. FIG. 7 is a view showing an example of another embodiment of the present invention, and is a vertical sectional side view of a pit portion of an elevator hoistway. In addition, other than FIG. 7, the above-described FIG.
~ Elevator and elevator pit ladder are configured in the same manner as in Fig. 6. In the figure, the same reference numerals as those in FIGS. 1 to 6 described above indicate corresponding parts, and 40 is a fixture, which is fastened to the longitudinal members 33 of the ladder 32 and arranged at the upper and lower ends, respectively, and the ladder 32 is pitted substantially vertically. Attach it to the wall of 5.

Reference numeral 41 is a first step plate of the ladder 32 having an L-shaped cross section. One side of the L-shape is manufactured to have a protruding dimension D21, and the other side of the L-shape is fastened to the front surface of the lowermost cross-bar 34. . Four
Reference numeral 2 is a second step plate of the ladder 32 having an L-shaped cross section, one side of which is made to have a protruding dimension D11 smaller than the protruding dimension D21, and the other side of the L-shaped is a crossbar 34 above the lowermost crossbar 34.
Is fastened to the front of.

In the embodiment of FIG. 7 also, the ladder 32 is arranged between the lowest floor 3 of the hoistway 1 and the bottom surface 6 of the hoistway 1 along the wall surface of the pit 5, and the cross bar 34 or The edges of the first tread 41 and the second tread 42 on the hoistway center side are
As they are arranged closer to the lower part, they are sequentially installed so as to project toward the center of the hoistway 1. Therefore, although detailed description is omitted, the same operation as that of the embodiment of FIGS. 1 to 6 can be obtained in the embodiment of FIG.

Further, in the embodiment of FIG. 7, the first tread 41 and the second tread 42 are fastened to the front surface of the corresponding cross bar 34. For this reason, the first tread 41 and the second tread 42 are appropriately attached to the standardly manufactured ladder 32 to match the depth of the pit 5 and the lowermost position of the car 11, and the required ladder 32 is mounted. Obtainable. Therefore, the productivity of the ladder 32 can be improved and the manufacturing cost can be reduced.

Embodiment 3. FIG. 8 is also a diagram showing an example of another embodiment of the present invention, which is a side view of the ladder. Note that, except for FIG. 8, an elevator and a ladder for an elevator pit are configured in the same manner as in FIGS. 1 to 6 described above. In the figure, the same reference numerals as those in FIG. 7 described above indicate corresponding parts, and 43 is a spacing piece, which is a gap between the front surface of the cross bar 34 and the front surface of the first cross plate 41 or the second cross plate 42 and the front surface of the cross bar 34. Form C11.

A step T1 is provided between the upper surface of the cross bar 34 and the upper surface of the first tread plate 41 or the second tread plate 42. As shown in FIG. 8, the ladder 32 is installed at an angle θ1 with respect to the vertical line, and the treads of the first tread 41 and the second tread 42 are arranged at an angle θ1 + 90 ° with respect to the vertical. It

In the embodiment of FIG. 8 also, the ladder 32 is arranged between the lowest floor 3 of the hoistway 1 and the bottom surface 6 of the hoistway 1 along the wall surface of the pit 5, and the cross bar 34 or The edges of the first tread 41 and the second tread 42 on the hoistway center side are
As they are arranged closer to the lower part, they are sequentially installed so as to project toward the center of the hoistway 1. Therefore, although detailed description is omitted, the same operation as the embodiment of FIGS. 1 to 6 and the embodiment of FIG. 7 can be obtained in the embodiment of FIG.

Further, in the embodiment shown in FIG.
4 and the first tread 41 or the second tread 42, a spacing piece 43 is interposed, and a gap C11 is formed between the front of the cross bar 34 and the front.
Are formed. For this reason, dust and oil-stained foreign matter are removed from the void C11, and these foreign matter do not accumulate on the tread surface, and slippage on the tread surface can be prevented.

Further, a step T1 is provided between the upper surface of the cross bar 34 and the upper surface of the first tread plate 41 or the second tread plate 42. Therefore, the ridge line portion on the upper surface of the cross bar 34 can prevent the shoes of the worker 30 from slipping and facilitate the use of the ladder 32.

Fourth Embodiment FIG. 9 is also a diagram showing an example of another embodiment of the present invention, and is a side view of the ladder. In addition, except for FIG. 9, an elevator and a ladder for an elevator pit are configured similarly to FIGS. 1 to 6 described above. In the figure, the same reference numerals as those in FIG. 7 described above indicate corresponding parts, and as shown in the figure, a step T1 is provided between the upper surface of the cross bar 34 and the upper surface of the first tread plate 41 or the second tread plate 42. Then, as shown in FIG. 9, the ladder 32 has an angle θ with respect to the vertical line.
The first tread plate 41 and the second tread plate 42 are installed with one inclination, and the tread surfaces of the first tread plate 41 and the second tread plate 42 are arranged at an angle θ1 + 90 ° with respect to the vertical line.

Also in the embodiment of FIG. 9, the ladder 32 is arranged between the lowest floor 3 of the hoistway 1 and the bottom surface 6 of the hoistway 1 and along the wall surface of the pit 5, and the cross bar 34 or The edges of the first tread 41 and the second tread 42 on the hoistway center side are
As they are arranged closer to the lower part, they are sequentially installed so as to project toward the center of the hoistway 1. Therefore, although detailed description is omitted, in the embodiment of FIG. 9, the same operation as that of the embodiment of FIGS. 1 to 6 and the embodiment of FIG. 7 can be obtained.

Further, in the embodiment shown in FIG.
A step T1 is provided between the upper surface of 4 and the upper surface of the first tread 41 or the second tread 42. Therefore, the ridge line portion on the upper surface of the cross bar 34 can prevent the shoes of the worker 30 from slipping and facilitate the use of the ladder 32.

Embodiment 5. FIG. 10 is also a view showing an example of another embodiment of the present invention, and is an enlarged side view of the grip portion shown in FIG. In addition, except for FIG. 10, an elevator and a ladder for an elevator pit are configured in the same manner as in FIGS. 1 to 6 described above. In the figure, the same reference numerals as those in the above-mentioned FIGS. 1 to 6 indicate the corresponding parts, and 39 is attached to the wall surface of the hoistway 1 corresponding to the end point switch 21 in the above-mentioned FIG. 2 is 120 from the frame of the entrance / exit 22 of the lowest floor hall 3 with the handle arranged nearer to No. 4.
It is provided at a position of about 0 mm or less.

The handle 39 is arranged with its length extending in the vertical direction, and mounting portions 44 are provided at both ends of the length, and are attached to the wall surface of the hoistway 1 by anchor bolts 45. Further, the mounting portion 44 is provided at a distance H1 shown in FIG. 10 from the wall surface of the hoistway 1. further,
The vertical direction of the longitudinal direction is arranged so as to straddle the position corresponding to the floor surface 4 of the lowest floor hall 3, and the upper end of the longitudinal length HL shown in FIG. 10 is arranged at a position of at least 1000 mm upward from the floor surface 4.

Further, the handle 39 is made of a tubular material such as a circular shape or a hexagonal shape, and the upper and lower end portions other than the grip portion having the longitudinal length HL shown in FIG.
4 is formed. Then, as shown in FIG. 10, the mounting portion 44 is inclined from the end portion of the longitudinal length HL upward at the upper end and downward at the lower end by an angle θ2, and the tip of the hoistway 1 is inclined. Anchor bolt 45 is inserted to form a portion parallel to the wall surface.

Also in the embodiment shown in FIG. 10, the ladder 32 is used.
Is arranged between the bottom floor 3 of the hoistway 1 and the bottom surface 6 of the hoistway 1 and is arranged along the wall surface of the pit 5, and the cross bar 34 or the first tread 41, the second tread 42 central side of the hoistway. The edge portions of are sequentially projected toward the center of the hoistway 1 as they are arranged closer to the lower portion. Therefore, although detailed description is omitted, the same operation as the embodiment of FIGS. 1 to 6 can be obtained in the embodiment of FIG.

Further, in the embodiment of FIG. 10, since the handle 39 whose longitudinal middle portion is not supported by the wall surface of the hoistway 1 is provided, the worker 30 climbs up and down the ladder 32 and goes in and out of the pit 5. When gripping, the grip 39 can be easily moved. Therefore, the worker 30 can further easily climb and descend the ladder 32.

Further, in the embodiment of FIG. 10, since the handle 39 is made of a pipe material and the upper and lower end portions other than the grip portion having the longitudinal length HL are flatly crushed to form the mounting portion 44, the mounting portion 44 is formed. The thickness H2 of the anchor bolt 45 arrangement portion of 44 is formed thin. Then, the attachment portion 44 together with the thin anchor bolt 45 arrangement portion has a long length HL.
As shown in FIG. 10, it is provided with an inclination of an angle θ2 in the direction of receding from the end.

Therefore, it is possible to prevent a problem that the movement of the balance chain or the like is caught by the attachment portion 44 when the balance chain (not shown) of the elevator, the moving cable 18 or the like is shaken. Further, since the handle 39 is made of a pipe material, it can be easily processed,
It has high productivity and can reduce the production cost.

Sixth Embodiment 11 and 12 are also views showing an example of another embodiment of the present invention, FIG. 11 is a vertical sectional side view of a pit portion of an elevator hoistway, and FIG. 12 is FIG.
FIG. Note that FIG. 11 and FIG.
An elevator is configured similarly to the above-described FIGS. 16 to 18 except for 2. In the figure, the above-mentioned FIGS.
6 to 18 indicate the corresponding parts.

Reference numeral 46 denotes a ladder, the upper end of which is arranged at a position of at least 1000 mm above the floor surface 4 of the lowest floor hall 3, and the lower end is arranged on the bottom surface 6 of the hoistway 1 pit 5 and the end point switch 21. It is provided at a position corresponding to the landing surface side of the car 11 in which accessories such as the car 11 are arranged, and is arranged near the entrance 22 of the lowest floor landing 3. Then, it is configured as described below.

That is, the ladder 46 is arranged at a distance TW from the car rail 14 in the direction of the entrance / exit 22 of the hall 3, and is a vertical member 4 which also serves as a switch box of the end point switch 21.
7 and one end of which are fastened to the car rail 14 via the rail clip 48 and the other end of which is also used as a support material for the switch box of the end point switch 21 fastened to the vertical member 47, and are arranged vertically apart from each other. It is composed of a crossbar 49. The distance TW is the effective length of the crossbar 49,
Set to at least 250 mm.

In the elevator pit ladder constructed as described above, the ladder 46 is the lowest floor hall 3 of the hoistway 1.
And the bottom surface 6 of the hoistway 1 are arranged along the wall surface of the pit 5, and the upper end portion is arranged at a position at least 1000 mm above the floor surface 4 of the lowest floor hall 3. Then, the worker 30 goes in and out of the pit 5 of the hoistway 1 to perform maintenance and inspection work in the pit 5, and at this time, the worker 30 can easily grasp the upper end portion of the ladder 46. Therefore, the worker 30 can more easily climb and descend the ladder 46.

In the embodiment of FIGS. 11 and 12, the member of the ladder 46 is also used as the switch box of the end point switch 21 and the supporting material of the switch box of the end point switch 21. Therefore, the manufacturing cost and installation cost of the elevator can be reduced.

In the embodiment shown in FIGS. 11 and 12, the lower end of the vertical member 47 which also serves as the switch box of the end point switch 21 is arranged close to the bottom surface 6 of the hoistway 1 pit 5, and the lower end portion thereof is arranged. Are supported by a crossbar 49 which also serves as a support material for the switch box of the end point switch 21. Therefore, the function of the crossbar 49 and the function of the switch box support can be achieved with a small number of members, and the manufacturing cost can be reduced.

[0065]

According to the present invention as the invention has been described above, the hoistway where the car is raised and lowered, are erected along the bottom floor landing and disposed in the wall of the hoistway between the bottom surface of the hoistway of the elevator shaft Each other
Timbers placed side-by-side in parallel with each other and these timbers
Plural pieces that are placed between and vertically separated from each other
Formed the stepped surface of the horizontal bar of the book and the lowermost horizontal bar, and one side overhangs to the center side of the horizontal projection plane of the hoistway .
The first tread and the step of the cross bar placed on the bottom cross bar
Surface and one side is the center side of the horizontal projection plane of the hoistway
It is placed overhanging and the overhanging position is the tension of the first tread.
It is located closer to the wall of the hoistway than the projecting position, and
When the surface descends to the lowest position, a space is formed with the lower surface of the car.
It is provided with a second step plate facing .

In this way, as the edge of the tread of the cross bar on the center side of the hoistway is arranged closer to the lower part of the ladder, it is sequentially installed so as to project to the center side of the hoistway. Therefore, when the worker gets down to the pit of the hoistway, it is possible to easily confirm the whereabouts of the ladder of the ladder from the lowest floor landing. Therefore, there is an effect of facilitating the worker to climb and descend the ladder.

[0067] Further, as the invention has been described above, the first step plate and a second tread plate fastened to the front surface of the pair <br/> response was rungs
It is provided .

In this manner, as the edge of the tread of the crossbar on the center side of the ascending / descending path is arranged closer to the lower part of the ladder, the edges are sequentially projected toward the center side of the hoistway. Therefore, when the worker gets down to the pit of the hoistway, it is possible to easily confirm the whereabouts of the ladder of the ladder from the lowest floor landing. Therefore, there is an effect of facilitating the worker to climb and descend the ladder.

Further, since the treads are fastened to the corresponding crossbars to form the treads of the crossbars, the treads can be appropriately attached to the standard manufactured ladders according to the pit depth and the situation of the lowest position of the car. By mounting the ladder on the board, a ladder having a required shape can be obtained. Therefore, the productivity of the ladder can be improved and the production cost can be reduced.

[0070] Further, as the invention has been described above, the
Spacer pieces that are respectively interposed between the one tread and the corresponding horizontal bar and between the second tread and the corresponding horizontal bar to form a gap are provided.
It is provided .

Then, as the edge of the tread of the cross-bar on the center side of the hoistway is arranged closer to the lower part of the ladder, it is sequentially installed so as to project toward the center side of the hoistway. Therefore, when the worker gets down to the pit of the hoistway, it is possible to easily confirm the whereabouts of the ladder of the ladder from the lowest floor landing. Therefore, there is an effect of facilitating the worker to climb and descend the ladder.

In addition, on the tread surface of the crossbar near the lower part, dust and foreign matters stained with oil are removed from the gap between the crossbar and the tread. Therefore, there is an effect of preventing these foreign matters from accumulating on the tread surface and preventing slippage on the tread surface.

Moreover, as the invention has been described above, the
Pair the upper surfaces of the first and second treads with the corresponding upper surface of the cross bar .
To form a step in the vertical direction and arrange it,
The first tread plate and the second tread plate are attached to each.

In this way, the edge of the tread of the crossbar on the center side of the ascending / descending path is sequentially projected toward the center side of the hoistway as it is arranged closer to the lower part of the ladder. Therefore, when the worker gets down to the pit of the hoistway, it is possible to easily confirm the whereabouts of the ladder of the ladder from the lowest floor landing. Therefore, there is an effect of facilitating the worker to climb and descend the ladder.

Further, since the step is formed on the tread formed by the cross bar and the tread, the ridge of the step of the tread can prevent the operator's shoes from slipping and facilitate the use of the ladder. Has the effect of Also, the tread of the tread
Forms an inclined surface with the edge on the center side of the hoistway raised
Attach the tread to the vertical member as shown. By this, the center of the hoistway
Prevents the slipping of the worker's shoes to the side and forms a tread
The effect of facilitating the use of the ladder in combination with the formed step
There is a fruit.

Further, as described above, the present invention is provided on the other wall surface of the hoistway connected to the wall surface of the hoistway provided with the entrance of the lowest floor hall, and is provided at a position corresponding to the side of the crossbar.
The handle is arranged in a vertical position, the longitudinal direction is arranged in the vertical direction, and the upper end is arranged above the floor surface of the lowest floor hall.

Then, as the edge of the tread surface of the crossbar on the center side of the hoistway is arranged closer to the lower part of the ladder, it is sequentially installed so as to project to the center side of the hoistway. Therefore, when the worker gets down to the pit of the hoistway, it is possible to easily confirm the whereabouts of the ladder of the ladder from the lowest floor landing. Therefore, there is an effect of facilitating the worker to climb and descend the ladder.

Further, since a handle is provided which corresponds to the position of the cross bar and whose upper end is arranged above the floor surface of the lowest floor hall, the operator can easily grab the handle and climb the ladder and descend. You can enter and exit the hoistway pit. This has the effect of facilitating maintenance and inspection work for the hoistway pit.

[0079] Further, the invention as described above is provided with a mounting portion configured to be inclined from the end of the grip portion is found respectively on the upper and lower ends to the distal retraction rather direction in the longitudinal gripping portion handle The handle is attached to the wall surface of the hoistway via the mounting portion.

Then, as the edge of the tread of the crossbar on the center side of the hoistway is arranged closer to the lower part of the ladder, it is sequentially installed so as to project to the center side of the hoistway. Therefore, when the worker gets down to the pit of the hoistway, it is possible to easily confirm the whereabouts of the ladder of the ladder from the lowest floor landing. Therefore, there is an effect of facilitating the worker to climb and descend the ladder.

Further, since the handle corresponding to the position of the cross bar and having the upper end located above the floor of the lowest floor hall is provided, the operator can easily grasp the handle to climb the ladder and descend. You can enter and exit the hoistway pit. This has the effect of facilitating maintenance and inspection work for the hoistway pit.

The handles are attached to the wall surface of the hoistway by the attachment portions formed on the longitudinal ends of the handles so as to incline in the direction of receding from the ends of the grips. Therefore, when the balance chain of the elevator is swayed, there is an effect of preventing a problem that the movement is restricted by being caught by the handle.

Further, according to the present invention, as described above, the hoistway for moving up and down the car, and the doorway of the lowest floor hall provided between the lowest floor hall of the hoistway and the bottom surface of the hoistway are provided. An end point that is formed along the other wall surface of the hoistway connected to the wall surface of the hoistway, is provided in the hoistway, and the length is arranged in the up-down direction, and is located below the floor surface of the lowest floor hall from below. The vertical member that doubles as the switch box of the switch and one end is fastened to the car rail provided in the hoistway and the other end is fastened to the vertical member, which also serves as the switch box support and is vertically separated from each other. It is a ladder made of horizontal crossbars.

As described above, since the vertical members provided below the floor surface of the lowest floor hall are provided, the operator can easily grab the vertical members to climb the ladder and descend and descend. You can enter and exit the road pit. by this,
This has the effect of facilitating maintenance and inspection work on the hoistway pit.

Further, the ladder member is provided so as to also serve as the switch box of the end point switch and the support material of the switch box. Therefore, there is an effect of reducing the manufacturing cost and installation cost of the elevator.

Further, as described above, the present invention constitutes a ladder by a vertical member whose upper end is arranged at least 1000 mm above the floor surface of the lowest floor hall and a cross bar having an effective length of at least 250 mm. It was done.

Even in this case, the member of the ladder is also provided as the switch box of the end point switch and the supporting material of the switch box. Therefore, there is an effect of reducing the manufacturing cost and installation cost of the elevator.

Since a vertical member is provided from a position above the floor surface of the lowest floor hall to a position below the floor surface, an operator can easily grab the vertical member and climb the ladder and descend to get down the hoistway. You can enter and leave the pit. This has the effect of facilitating maintenance and inspection work for the hoistway pit.

[Brief description of drawings]

FIG. 1 is a view showing a first embodiment of the present invention, and is a vertical cross-sectional side view of a pit portion of an elevator hoistway.

FIG. 2 is an enlarged plan view of FIG.

3 is a perspective view showing the ladder of FIG. 1 in an enlarged manner and partially disassembled.

FIG. 4 is a view corresponding to FIG. 1 for explaining the usage status of the ladder of FIG. 1.

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

6A and 6B are views for explaining details of the usage situation of the ladder of FIG. 1, FIGS. 6A to 6C are side views, and FIGS.
c) is a plan view.

FIG. 7 is a view showing a second embodiment of the present invention and is a vertical cross-sectional side view of a pit portion of an elevator hoistway.

FIG. 8 is a side view of the ladder, showing the third embodiment of the present invention.

FIG. 9 is a side view of the ladder, showing the fourth embodiment of the present invention.

FIG. 10 is a view showing the fifth embodiment of the present invention and is an enlarged side view of the grip portion shown in FIG. 4 described above.

FIG. 11 is a view showing a sixth embodiment of the present invention and is a vertical sectional side view of a pit portion of an elevator hoistway.

12 is an enlarged cross-sectional plan view of the main part of FIG.

FIG. 13 is a view showing a conventional elevator pit ladder, and is a longitudinal sectional view conceptually showing the elevator.

FIG. 14 is an enlarged view of part A in FIG.

15 is an enlarged cross-sectional view taken along the line BB of FIG.

FIG. 16 is a view showing another conventional elevator pit ladder, and is a longitudinal sectional view conceptually showing the elevator.

FIG. 17 is an enlarged view of part C in FIG.

[18] D-D line reduction sectional view of FIG. 17.

[Explanation of symbols]

1 hoistway, 3 bottom floor, 4 floor, 6 bottom, 1
1 car, 14 car rails, 21 end switch,
22 doorway, 34 cross bar, 37 first tread plate, 38 second tread plate, 39 handle, 41 first tread plate, 42 second tread plate, 43 spacing piece, 44 mounting part, 46 ladder, 47
Vertical wood, 49 horizontal bar.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliographic flats 3-25478 (JP, U) real flats 6-37261 (JP, U) real open Sho 50-152358 (JP, U) real open Sho 54- 55052 (JP, U) Actual development 55-92669 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B66B 5/00 B66B 7/00

Claims (8)

(57) [Claims] 1. A hoistway for a car to ascend and descend, disposed between a bottom floor of the hoistway and a bottom surface of the hoistway, standing upright along a wall of the hoistway and arranged in parallel apart from each other. Done
Vertical members , a plurality of horizontal bars arranged between these vertical members and vertically separated from each other , and on the bottom
The horizontal projection surface of the hoistway is formed on one side and forms the tread surface of the crossbar.
The first tread that is placed overhanging in the center of
Form the tread of the cross bar placed on the bottom cross bar
One side overhangs on the center side of the horizontal projection plane of the hoistway
And the overhanging position is the tension of the first tread.
It is placed closer to the wall of the hoistway than the exit position, and
Form a lower surface with a gap of the car viewed surface is lowered to the lowest position
A ladder for an elevator pit that has a second tread that is formed and faces . 2. A first step board and the second treadle, the corresponding rungs of a ladder elevator pit according to claim 1, characterized in that as fastened to the front. 3. Between the first tread and the corresponding cross bar and the second
Voids are respectively interposed between the rungs corresponding with step board
A ladder for an elevator pit according to claim 2, wherein the ladder is provided. 4. Corresponding upper surfaces of the first tread and the second tread
It was to form a step in the vertical direction with respect to the upper surface of the rail, the corresponding
3. The ladder for an elevator pit according to claim 2 , wherein the first tread and the second tread are attached to the cross bar . 5. A is disposed at a position doorway is corresponds to the side of the provided in addition to the wall surface rungs of the hoistway connected to the wall of the elevator path provided in the lowest floor landing, and the longitudinal The elevator pit ladder according to claim 1, further comprising a handle arranged in a vertical direction and having an upper end arranged above a floor surface of the lowest floor hall. 6. A handle is provided with mounting portions which are respectively provided at upper and lower ends of a long grip portion and are inclined in a direction of receding from an end portion of the grip portion, and the grip is provided via the mounting portions. The elevator pit ladder according to claim 5, wherein the ladder is mounted on the wall surface of the hoistway. 7. A hoistway for a car to ascend and descend, connected to a wall surface of the hoistway which is disposed between the lowest floor hall of this hoistway and the bottom surface of the hoistway and which is provided with an entrance of the lowest floor hall. A switch box of the end point switch which is formed along the other wall surface of the hoistway, is provided in the hoistway, is vertically arranged in the longitudinal direction, and is provided below the floor surface of the lowest floor hall from a position above the floor surface. The vertical member which also serves as the vertical member and one end of which is fastened to the car rail provided in the hoistway and the other end of which is also fastened to the vertical member and which are also used as supporting members for the switch box and are vertically separated from each other. Elevator pit ladder composed of horizontal bars. 8. upper end to a vertical member disposed toward the at least 1000mm than the floor of the lowest floor landing, at least 2
The ladder for an elevator pit according to claim 7, wherein the ladder is a cross bar having an effective length of 50 mm.