JP2016108112A - Pit ladder device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pit ladder which can be stored under a land sill when not in use, and which can be easily installed to provide a wide movable range thereof in a direction to facilitate ascending and descending when in use.SOLUTION: A pit ladder comprises: a pair of longitudinal members 17a, 17b; and traverse members 18 attached to the longitudinal members 17a, 17b, at a predetermined interval. The pit ladder also includes: a ladder body capable of being stored while obliquely erected under a landing sill 14 when not in use; and turning coupling means 22 having at least two rotational axes connecting an upper end of each one of the longitudinal members 17a to the landing sill 14 to allow the ladder body to be moved up to a use position by performing at least a two-stage combined turning operation.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to an elevator pit ladder apparatus.

In the elevator, the lowermost part of the hoistway is called a pit, and various devices such as a shock absorber are installed in the pit. When performing inspection and maintenance work in the pit, maintenance personnel use the ladder from the landing on the lowest floor to get down to the pit to inspect and maintain various equipment installed in the pit. Usually, a ladder is always provided in the pit.
The space between the hoistway and the car is narrow, and conventionally, this type of pit ladder is often permanently stored on the lower wall of the entrance of the lowest floor landing.

  While the maintenance staff stands at the doorway of the lowermost hall and leans out, pulls the rope connected to the ladder and raises the ladder so that the ladder can be used. Then, a ladder was erected on the landing threshold and descended into the pit. When the maintenance work is finished in the pit, the maintenance staff climbs the ladder and returns to the landing, and then stores the ladder in its original position.

  When the ladder was laid flat as in the past, the maintenance staff could not reach the ladder without lifting the ladder from the threshold to lift the ladder. At that time, there was no place to catch, so there was a risk of falling out of balance and falling into the pit.

  Therefore, in order to facilitate the removal of the ladder, a pit ladder device has been proposed in which the ladder is stored under the landing sill when not in use and can be moved by rotating or sliding the ladder when in use (for example, patents). Reference 1).

JP 2003-327372 A

  However, in the case of a ladder that is rotated during use, there is a problem that the movable range in which the ladder can be moved is limited, so that the ladder may not be directed in a direction that makes it easy to climb up and down. There was also a problem with stability when using the ladder.

  Therefore, the present invention has been made in view of the above-mentioned problems of the prior art, and can be stored under the landing sill when not in use. It is an object of the present invention to provide an elevator pit ladder apparatus that can easily install a ladder in a direction that is easy to do.

  In order to achieve the above object, an elevator pit ladder apparatus according to an embodiment of the present invention is used for climbing up and down maintenance personnel between a pit provided in an elevator hoistway and a lowest floor landing. In the elevator pit ladder stored under the landing sill installed in the lower floor landing, a pair of vertical members, and a horizontal member forming a step attached at a predetermined interval between the vertical frames, When the ladder is not used, one of the above-mentioned ladder bodies can be taken out to a use position by combining a ladder body stored in an obliquely standing position under the landing sill and a turning operation of at least two stages. And a turning connecting means having at least two turning shafts for connecting the upper end portion of the vertical member to the landing sill.

It is sectional drawing of the hoistway 10 which looked at the pit in which the pit ladder apparatus by this embodiment is installed from the cage | basket | car bottom. It is a front view which shows the state (state when a ladder is not used) where the pit ladder by 1st Embodiment was stored by the wall of the hoistway under the landing threshold. It is a front view which shows the pit ladder of 1st Embodiment placed in the state which can be used under a landing threshold. It is a schematic diagram which shows the rotation connection means which connects a pit ladder and a landing threshold in 1st Embodiment. It is the figure which looked at the turning operation | movement of the pit ladder from a stowed position to a use position in 1st Embodiment from the top. It is a perspective view which shows turning operation | movement of the pit ladder in 1st Embodiment. It is a front view which shows the state where the pit ladder was fixed with the clasp at the wall of the hoistway under the landing threshold and stored. It is a front view which shows the state (state when a ladder is not used) where the pit ladder by 2nd Embodiment was stored by the wall of the hoistway under the landing threshold. It is a front view which shows the pit ladder of 2nd Embodiment placed in the state which can be used under a landing threshold. It is a schematic diagram which shows the rotation connection means which connects a pit ladder and a landing threshold in 2nd Embodiment. It is the figure which looked at the turning operation | movement of the pit ladder from a stowed position to a use position in 2nd Embodiment from the top. It is a front view which shows the state which the handle part extended in the pit ladder by 3rd Embodiment. It is a front view which shows the state which the handle part extended in the pit ladder by the other example of 3rd Embodiment. It is a front view which shows the state which the handle part extended in the pit ladder by 4th Embodiment. It is a front view which shows the state which the handle part extended in the pit ladder by the other example of 4th Embodiment.

Hereinafter, an embodiment of an elevator pit ladder apparatus according to the present invention will be described with reference to the accompanying drawings.
(First embodiment)
FIG. 1 is a cross-sectional view of a hoistway 10 when a pit where a pit ladder device according to the present embodiment is installed is viewed from below a car.
On the side wall forming the elevator hoistway 10, an entrance 12 of the elevator floor on the lowest floor is opened. A landing threshold 14 is disposed at the entrance 12 of the elevator hall so as to protrude toward the hoistway 10 side.
A pit ladder 16 configured as shown in FIGS. 2 to 4 is provided at the entrance 12 so that the maintenance staff can get into the pit from the entrance 12 when performing inspection and maintenance work of the pit.

  Here, FIG. 2 is a front view showing a state where the pit ladder 16 is housed near the wall of the hoistway 10 under the landing threshold 14 (when the ladder is not used). FIG. 3 is a front view showing the pit ladder 16 placed in a usable state under the landing threshold 14.

  The main body of the pit ladder 16 has a pair of parallel vertical members 17a and 17b, and a plurality of horizontal members 18 that become steps of steps when climbing up and down are spaced apart from each other by a certain distance. It is attached.

  In the pit ladder 16 of this embodiment, the vertical member 17a and the vertical member 17b have different lengths. One vertical member 17a has an extended portion 20, is longer than the other vertical member 17b, and extends further upward.

  The length of the vertical member 17a including the extension 18 is longer than the height of the landing threshold 14 from the floor 15 of the pit. As shown in FIG. 2, in the pit ladder 16 in the storage state, the lower end of the vertical member 17a is landed on the floor 15 of the pit, whereas the lower end of the other vertical member 17b is the floor 15 Stored in a slanted posture that floats from.

  Moreover, in this embodiment, the upper end part of the vertical member 17a of the pit ladder 16 is connected to the landing sill 14 via the turning connecting means 22 as shown in FIG.

This turning connection means 22 is means for connecting the bit ladder 16 to the landing sill 14 in a freely rotatable manner. The swivel connecting means 22 is a joint mechanism in which the first joint 23 and the second joint 24 are combined.
Among these, the upper end of the first joint 23 is fixed to the lower surface of the landing threshold 14. The 1st joint 23 is connected with the upper end of the 2 joint 24 via the connection part 25 bent in the character shape. The lower end of the second joint 24 is fixed to the extension 20 of the vertical member 17 a of the pit ladder 16.

  The pit ladder 16 can be turned around a vertical first turning axis by the first joint 23. Further, the pit ladder 16 can be turned by the second joint 24 to be a second turning axis coaxial with the vertical member 15a. You can turn around.

The elevator pit ladder apparatus according to the present embodiment is configured as described above. Next, the operation and effect thereof will be described.
As shown in FIGS. 1 and 2, when the pit ladder 16 is not used, the pit ladder 16 can be placed under the end of the landing sill 14 and stored in a slanted position on the wall of the hoistway 10, so that it can be stored in a narrow pit. Even it can be stored without taking up space.

  When the maintenance staff gets down to the pit using the pit ladder 16 at the time of inspection / maintenance work in the pit, the pit ladder 16 stored by turning the pit ladder 16 in two stages as follows. Can be installed in a usable position.

Here, FIG. 5 is a top view of the turning operation of the pit ladder 16 from the position A which is the storage position to the position C which is the use position. FIG. 6 is a perspective view showing the turning operation of the pit ladder 16.
The route on which the pit ladder 16 turns is divided into a route from the position A to the intermediate position B and a route from the position B to the position C.

  First, in order to take out the pit ladder 16 stored near the wall of the hoistway 10, the first joint 23 (see FIG. 4) of the turning connecting means 22 is used, and the entire pit ladder 16 is rotated around the vertical first turning axis. And move to position B.

  In the path between the positions A and B, the pit ladder 16 turns so that the vertical member 17a draws a conical surface having the first joint 23 as a vertex. When the pit ladder 16 is moved to the position B, the lower end of the vertical member 17a is allowed to land on the floor 15 of the pit.

  Next, using the second joint 24 (see FIG. 4) of the turning connecting means 22, the pit ladder 16 is turned around the vertical member 17a by the second turning shaft. As a result, the pit ladder 16 moves to the position C, and the lower ends of the vertical members 17a and 17b are both in contact with the floor 15 of the pit, and the pit ladder 16 can be used.

  The movable range of the pit ladder 16 can be increased by combining the turning operation around the first turning axis and the turning operation around the second turning axis as described above. For this reason, by combining the above-described two-stage turning operations, the bit ladder 16 can be installed in the position C in an orientation and posture that makes it easy to climb up and down.

  In the position C shown in FIG. 6, the pit ladder 16 can be installed so that the lateral member 18 as a step is horizontal, so that it becomes easy for the inspector to get down to the pit and climb up and return. Further, since the vertical members 17a and 17b are both attached to the floor surface 15, the pit ladder 16 can be stabilized.

  Further, at the position C, the pit ladder 16 can be disposed as close as possible to the position of the landing door 11 so that the pit ladder 16 can be easily used even when the landing door 11 is in a half-open state.

  When the inspection / maintenance work at the pit is completed and the pit ladder 16 is cleared, the turning operation from the position C to the position B and the turning operation from the position B to the position A are performed in the reverse order of the above-described turning operation. And store in an oblique posture at the position A near the wall.

  As shown in FIG. 7, when storing the pit ladder 16, the upper end portion of the vertical member 17 b can be fixed to the landing sill 14 using a stopper 26.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. 8 to 11, the same reference numerals as those in FIG. 2 of the first embodiment denote the same components, and detailed description thereof will be omitted.
In the second embodiment, the vertical member 17a and the vertical member 17b constituting the pit ladder 30 have the same length, and the turning connection means 32 connects the upper end of one vertical member 17b to the landing sill 14. It is supposed to be.

  As shown in FIG. 8, in the pit ladder 30 in the storage state near the wall of the hoistway, the lower end of one vertical member 17 a is landed on the floor 15 of the pit, whereas the other vertical member The lower end of 17 b is stored in an oblique posture floating from the floor 15. This is the same as in the first embodiment.

  FIG. 9 shows the pit ladder 16 taken out of the storage position and in use. Also in the second embodiment, the pit ladder 16 is connected to the landing sill 14 by the turning connecting means 32 and can be taken out to the use position through a two-step turning operation.

Next, FIG. 10 shows the turning connecting means 32 according to the second embodiment.
The swivel connecting means 32 includes a first joint 33 serving as a first swivel axis parallel to the longitudinal direction of the landing sill 14 and a second joint serving as a second swivel axis perpendicular to the first swivel axis and horizontal. 34 is a joint mechanism.

Next, the turning operation of the pit ladder 30 according to the second embodiment as described above will be described.
Here, FIG. 11 is a view showing the turning operation of the pit ladder 16 from the position A which is the storage position to the position C which is the use position via the intermediate position B from the top.

  First, in order to take out the pit ladder 16 stored near the wall of the hoistway 10 under the end of the landing sill 14, the first joint 33 (see FIG. 10) of the turning connection means 32 is used, and the entire pit ladder 16 is Turn to position B around the first turning axis parallel to the landing sill 18.

  In the turning operation between the positions A and B, the pit ladder 16 turns in an inclined posture, and the lower end of the vertical member 17a that has arrived at the floor surface 15 of the pit is separated from the floor surface 15 at the position A. .

  Next, by using the second joint 34 (see FIG. 9) of the swivel connecting means 32, the entire pit ladder 16 is swung around the second swivel axis that is orthogonal to the first swivel axis on the horizontal plane. As a result, the pit ladder 16 that has been tilted so far moves to the position C, and as shown in FIG. 9, the lateral member 18 that is the step becomes horizontal, and the pit ladder 16 can be used.

  As described above, also in the second embodiment, the movable range of the pit ladder 16 can be increased by combining the turning operation around the first turning axis and the turning operation around the second turning axis. For this reason, by combining the above-described two-stage turning operations, the bit ladder 16 can be installed in an orientation and posture that makes it easy to climb up and down.

  As shown in FIG. 9, when the pit ladder 16 is fixed in use, the upper end of the vertical member 17a is fixed to the landing sill 14 with a bolt 37 or the like via a bracket 36 attached to the landing sill 14. Is preferred.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIGS. 12 and 13, the same reference numerals as those in FIG. 2 of the first embodiment and FIG. 8 of the second embodiment denote the same components, and detailed description thereof will be omitted.
The third embodiment is an embodiment in which a handle that is gripped when climbing up and down can be extended from the pit ladder 16. FIG. 12 shows the pit ladder 16 with the handle extended.

  In the third embodiment, in the pit ladder 16 of the first embodiment, the vertical members 17a and 17b are configured to be extendable and extended, and the extended handle portions 40a and 40b are extended from the vertical members 17a and 17b. 40a and 40b can be used as handles. Cylindrical members are used for the vertical members 17a and 17b, and the extended handle portions 40a and 40b are inserted in a nested manner from the upper ends of the vertical members 17a and 17b.

  According to the third embodiment as described above, when the maintenance staff gets down to the pit using the pit ladder 16 at the time of inspection / maintenance work, the extended handle portions 40a and 40b are connected to the vertical members 17a and 17b of the pit ladder 16. If the pins 42 are inserted and fixed, the extension handle portions 40a and 40b can be used as handles. The maintenance staff can easily get into the pit without losing the balance of the body while holding onto the extension handle portions 40a and 40b.

  When inspection and maintenance work is over and the maintenance staff climbs the pit ladder 16 and returns to the landing, the body can be safely lifted by keeping the balance of the body while grasping the extended handle portions 40a and 40b protruding to the landing. Is possible.

  FIG. 13 shows an example in which the present embodiment is applied to the pit ladder 30 of the second embodiment, and the handle is shown in an extended state.

  Also in the pit ladder 30, the extended handle portions 40a and 40b are inserted from the upper ends of the vertical members 17a and 17b in a nested manner, so that the extended handle portions 40a and 40b can be extended and used as handles. .

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIGS. 14 and 15, the same reference numerals as those in FIG. 2 of the first embodiment and FIG. 8 of the second embodiment denote the same components, and detailed descriptions thereof are omitted.
FIG. 14 shows an example in which the fourth embodiment is applied to the pit ladder 16 of the first embodiment, and shows a state in which the handle is extended.
In the pit ladder 16, the handle portions 43a and 43b are attached to the upper end portions of the vertical members 17a and 17b so as to be rotatable by 180 degrees.

  According to the fourth embodiment as described above, when the maintenance staff gets down to the pit using the pit ladder 16 in the inspection / maintenance work, the pin 42 for fixing the handle is pulled out, and then the handle portions 43a and 43b. Can be used as the handle if the landing threshold 14 is rotated 180 degrees. The maintenance staff can easily get into the pit without losing the balance of the body while holding onto the handle portions 43a and 43b.

  When inspection / maintenance work is completed and the maintenance staff climbs the pit ladder 14 and returns to the landing, it is possible to safely go up to the landing by maintaining the balance of the body while grasping the handle portions 43a and 43b protruding from the landing threshold 14 Is possible.

Next, FIG. 15 shows an example in which the present embodiment is applied to the pit ladder 30 of the second embodiment.
Also in this pit ladder 30, the handle portions 43a and 43b can be used as the handles by attaching the handle portions 43a and 43b to the upper ends of the vertical members 17a and 17b so as to be rotatable by 180 degrees.

  The elevator pit ladder apparatus according to the present invention has been described with reference to preferred embodiments. However, these embodiments are given as examples and are not intended to limit the scope of the invention. Of course, the novel apparatus, method and system described in the specification can be implemented in various forms, and various omissions, substitutions and changes can be made without departing from the spirit of the present invention. is there. The claims and their equivalents are intended to cover the embodiments or improvements thereof within the spirit of the invention.

DESCRIPTION OF SYMBOLS 10 ... Pit, 12 ... Entrance / exit, 14 ... Platform sill, 15 ... Pit floor, 16 ... Pit ladder, 17a, 17b ... Vertical member, 18 ... Transverse member, 20 ... Extension part, 22 ... Turning connection means, 23 ... 1st joint, 24 ... 2nd joint, 30 ... Pit ladder, 32 ... Turning connection means, 33 ... 1st joint, 34 ... 2nd joint

In order to achieve the above-mentioned object, an elevator pit ladder apparatus according to an embodiment of the present invention is used for climbing a maintenance worker between a pit provided in an elevator hoistway and a lowest floor landing, In the elevator pit ladder stored under the landing sill installed at the lowest floor landing, a pair of vertical members, and a horizontal member forming a step attached at a predetermined interval between the vertical frames, When the ladder is not used, the ladder body can be taken out to the use position by combining the ladder body stored in a posture standing obliquely with respect to the vertical direction under the landing sill and at least two stages of turning motion. As described above, there is provided a turning connecting means having at least two turning shafts for connecting the upper end portion of one of the vertical members to the landing sill.

Claims (6)

In the elevator pit ladder that is used for the climbing of maintenance personnel between the pit provided in the elevator hoistway and the lowest floor landing, and is stored under the landing sill installed in the lowest floor landing,
It consists of a pair of vertical members and a horizontal member that forms a step that is attached between the vertical frames at a predetermined interval. When the ladder is not used, it is stored in a posture standing diagonally under the landing sill. A ladder body,
A swivel connecting means having at least two swivel shafts for connecting the upper end of one of the vertical members to the landing sill so that the ladder main body can be taken out to a use position by combining at least two swivel movements;
An elevator pit ladder device.   The swivel connecting means connects a long vertical member of the pair of vertical members and the landing sill, a first swivel shaft that enables the ladder body to turn around a vertical axis, and the long vertical member The elevator pit ladder apparatus according to claim 1, further comprising: a second turning shaft that enables the ladder body to turn about an axis of the elevator.   The swivel connecting means includes a first swivel shaft that allows the ladder body to swivel about an axis parallel to a longitudinal direction of the landing sill, and a second swivel axis that is orthogonal to the first swivel axis on a horizontal plane. The elevator pit ladder apparatus according to claim 1, further comprising: a second turning shaft that enables the ladder body to turn.   The handle according to any one of claims 1 to 3, further comprising a handle portion that can extend upward from the pair of vertical members by sliding or rotating when the ladder body is fixed at a use position. Elevator pit ladder equipment.   The elevator pit ladder apparatus according to claim 2, further comprising means for fixing an upper end portion of the shorter vertical member to the landing sill when the ladder main body is stored.   The elevator pit according to claim 3, further comprising means for fixing an upper end portion of the vertical member not connected to the turning connecting means to the landing sill when the ladder body is fixed to a use position. Ladder device.

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