JP2023005944A - Pit ladder device - Google Patents

Abstract

To provide a pit ladder device capable of installing a ladder at a use position with lesser burden than the prior arts.SOLUTION: A pit ladder device 100 includes an interlocking part 20 and a ladder part 10. The interlocking part 20 is connected to landing doors 91a, 91b of a lowermost floor at which an elevator device is provided and operated using the opening/closing of the landing doors 91a, 91b as driving force. The ladder part 10 is connected to the interlocking part 20 and moved to a use position where an operator uses the ladder part interlockingly with the opening operation of the landing doors 91a, 91b and moved to a storage position interlockingly with the closing operation of the landing doors 91a, 91b.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to a pit ladder system provided in the wall of a hoistway of an elevator system.

The bottom of the hoistway of the elevator installation is called the pit. In this pit, various devices including shock absorbers are installed. Maintenance personnel who perform maintenance and inspection of such various devices need to go down to the pit using a ladder installed in the pit from the landing on the lowest floor.

Patent Document 1 discloses a pit ladder device that can store the ladder under the landing threshold when not in use, and can be installed at the use position by maintenance personnel turning the ladder when in use.

JP 2016-108112 A

The pit ladder system described above required maintenance personnel to pivot the ladder in order to place the ladder in position for use.

The present disclosure has been made in view of the above problems, and an object of the present disclosure is to provide a pit ladder device that allows the ladder to be installed at the use position with less burden than conventional ones.

The pit ladder device according to the present disclosure is connected to a landing door on the lowest floor of a building equipped with an elevator device, and is connected to an interlocking portion that operates using the opening and closing of the landing door as a driving force. A ladder part that moves to a use position used by a worker in conjunction with a door opening operation, and moves to a retracted position in conjunction with a door closing operation of a landing door.

ADVANTAGE OF THE INVENTION According to this indication, the pit ladder apparatus which can install a ladder in a use position with less load than before can be provided.

FIG. 2 is a schematic view of the hoistway with the landing doors in the closed state as viewed from above according to the first embodiment; FIG. 2 is a schematic view of the hoistway with the landing door closed, as viewed from above in the first embodiment; Fig. 2 is a front view of the pit ladder device when the landing door is in the closed state according to the first embodiment; Fig. 2 is a front view of the pit ladder device when the landing door is in the closed state according to the first embodiment; 4 is an enlarged view of a lower roller in Embodiment 1. FIG. 4 is an enlarged view of the connecting portion when the car does not stop at the lowest floor in Embodiment 1. FIG. FIG. 4 is an enlarged view of the connecting portion when the car is stopped at the lowest floor in Embodiment 1; 4 is a right side view of the pit ladder device according to Embodiment 1. FIG.

Embodiment 1.
The pit ladder device 100 according to the first embodiment will be described below with reference to the drawings. First, the outline of this embodiment will be described with reference to FIGS. 1 and 2. FIG. The same reference numerals in each drawing represent the same or equivalent configurations. 1 and 2 are schematic diagrams of a hoistway 200 portion on the lowest floor of a building provided with an elevator apparatus, viewed from above.

FIG. 1 is a diagram when the landing doors 91a and 91b are closed, and FIG. 2 is a diagram when the landing doors 91a and 91b are open. The landing door 91a and the landing door 91b are left and right landing doors, respectively, when the landing doors are viewed from the inside of the hoistway 200 . In the following description, the landing door 91 is used when there is no need to distinguish between them or when both are indicated.

1 and 2, ladder section 10 represents the ladder portion of pit ladder apparatus 100, which will be described later. A car position 201 indicated by a dotted line in FIGS. 1 and 2 is a car stop position when the car of the elevator apparatus stops at the lowest floor. 1 and 2 both show a state in which the car does not stop at the lowest floor.

As shown in FIG. 1, the ladder section 10 is housed at a stowed position different from the car position 201 when the landing door 91 is closed. Then, when the landing door 91 is in the open state, as shown in FIG. 2, the ladder section 10 moves to the use position in front of the landing and used by the worker. As will be described in detail later, when the car is stopped at the lowest floor, even if the landing door 91 is opened, the ladder part 10 does not move and remains in the retracted position.

Next, the configuration of the pit ladder device 100 will be described in detail with reference to FIGS. 3 and 4. FIG. 3 and 4 are front views of the pit ladder apparatus 100 viewed from the inside of the hoistway in the door closed state and the door open state shown in FIGS. 1 and 2, respectively.

The pit ladder device 100 includes a ladder portion 10 that is a ladder and an interlocking portion 20 that moves the ladder portion 10 in conjunction with the opening and closing of the landing door 91. is provided in

The interlocking part 20 is connected to the landing door 91, which is the landing door on the lowest floor of the building equipped with the elevator device, by mounting metals 93a and 93b, which will be described later, and operates with the opening and closing of the landing door 91 as a driving force. It has pulleys 21 a and 21 b and a rope 22 .

A total of two pulleys 21a and 21b are provided, one each on the left and right in the lateral direction of the drawing, which is the opening/closing direction of the landing door 91 . Specifically, one is provided at each lower end of the landing threshold 92 . The left side of the paper surface is the pulley 21a, and the right side is the pulley 21b. In the following description, the pulleys 21 are used when they are not distinguished from each other or both are indicated.

The rope 22 is connected to the landing door 91 by fittings 93a and 93b and is wound around both pulleys 21. As shown in FIG. The rope 22 has a ring shape, and in the present embodiment, a metal fitting 93a is attached to the upper side of the rope 22, and a metal fitting 93b is attached to the lower side. Further, in the following description, the mounting metal 93 is also referred to when the mounting metal 93a and the mounting metal 93b are not distinguished or both are indicated.

The mounting metal 93a is attached to the landing door 91a and pulls the upper side of the rope 22 to the left side of the paper surface when the landing door 91 is opened and to the right side of the paper surface when the landing door 91 is closed. The mounting metal 93b is attached to the landing door 91b, and pulls the lower side of the rope 22 to the right side of the drawing when the landing door 91 opens, and pulls it to the left of the drawing when the landing door 91 closes. pull.

The ladder part 10 is connected to the interlocking part 20, and interlocked with the opening and closing operation of the landing door 91 to move to the use position or the storage position used by the operator. It has an upper roller 10a not shown in FIGS.

The lower roller 11 is provided at the lower end of the ladder section 10 and rolls along a guide 94 provided at the bottom of the hoistway 200 . FIG. 5 is an enlarged view of the lower roller 11 and the guide 94. FIG.

Next, the connecting portion 12 will be described in detail with reference to FIGS. 6 to 8. FIG. FIG. 6 is an enlarged view of the connecting portion 12 when the car does not stop at the lowest floor. FIG. 7 is an enlarged view of the connecting portion 12 when the car is stopped at the lowest floor. FIG. 8 is a view of the connecting portion 12 when the car shown in FIG. 6 is not stopped at the lowest floor, viewed from the right side of the paper surface of FIGS. 3 and 4. FIG. A stopper 23b, which will be described later, is omitted in FIG.

The two upper rollers 10a provided at the upper end of the ladder section 10 roll inside the landing threshold 92, and the shafts of the upper rollers 10a pass between the slits 92a of the landing threshold 92 to extend the ladder section 10. connected to the body.

The connecting portion 12 connects the ladder portion 10 to the rope 22 and includes two hooks 12a, a lever 12b, a roller 12c and a weight 12d.

The hook 12a hooks the rope 22, and hooks the lower side of the rope 22 in this embodiment. The hook 12a hooks the lower side of the rope 22 at its tip and is rotatably attached to the main body of the ladder portion 10. - 特許庁The opposite side of the hook 12a across the main body of the ladder portion 10 is connected to the lever 12b.

Further, the rope 22 is provided with stoppers 23a and 23b so as to sandwich the two hooks 12a. When viewing the landing door 91 from the inside of the hoistway 200, the left side is the stopper 23a and the right side is the stopper 23b. It should be noted that the stopper 23 is used when these are not distinguished or when both are indicated.

The lever 12b operates two hooks 12a. The roller 12c is installed above the lever 12b. The cam 80 shown in FIG. 7 is a part attached to the car of the elevator system and contacts the roller 12c when the car stops at the lowest floor.

The weight 12d is installed on the opposite side of the lever 12b across the main body of the ladder portion 10, and applies downward force to the hook 12a by gravity.

Next, the operation of the pit ladder apparatus 100 according to this embodiment will be described in detail. In the following description, the left side and the right side are the left side and the right side of the paper surface in FIGS. First, the operation of moving the ladder section 10 will be described.

The hook 12a hooks the rope 22 when the car is not parked on the lowest floor. The operation for releasing the jam will be described later.

When the landing door 91 performs the door opening operation, the mounting metal 93 attached to the lower part of the landing door 91 moves to rotate the rope 22 . Specifically, since the mounting metal 93a attached to the landing door 91a is attached to the upper side of the rope 22, the upper side of the rope 22 is moved to the left. Further, since the mounting metal 93b attached to the landing door 91b is attached to the lower side of the rope 22, the lower side of the rope 22 is moved to the right.

As the rope 22 moves, the stopper 23a provided below the rope 22 presses the hook 12a to the right. By pressing the hook 12a, the lower roller 11 and the upper roller 10a of the ladder portion 10 rotate, and the ladder portion 10 moves to the right. And the ladder part 10 will be installed in a use position, when the landing door 91 is a door open state.

When the landing door 91 performs the door closing operation, the mounting metal 93 attached to the lower part of the landing door 91 moves in the direction opposite to the door opening operation and rotates the rope 22 in the opposite direction to the door opening operation.

As the rope 22 moves, the stopper 23b provided below the rope 22 presses the hook 12a leftward. By pressing the hook 12a, the lower roller 11 and the upper roller 10a of the ladder portion 10 rotate, and the ladder portion 10 moves to the left. When the landing door 91 is in the closed state, the ladder section 10 is installed at the retracted position.

Next, the operation of releasing the hook 12a from being caught on the rope 22 and the operation of the hook 12a being caught on the rope 22 again will be described.

When the car of the elevator system stops at the bottom floor, a cam 80 attached to the car contacts roller 12c. When cam 80 contacts roller 12c, lever 12b is operated. Specifically, the lever 12b is pushed downward, the hook 12a is lifted, and the catching on the rope 22 is released.

When the hook 12a is not caught on the rope 22, the hook 12a is not pressed by the stopper 23 even if the landing door 91 is opened, so the ladder section 10 does not move.

On the other hand, when the car of the elevator system moves from the state where it is stopped at the lowest floor, the cam 80 is separated from the roller 12c, releasing the pressure on the lever 12b. Then, the hook 12a is hooked on the rope 22 again by the downward force exerted on the hook 12a by the weight 12d.

As described above, according to the present embodiment, it is possible to provide the pit ladder apparatus 100 that allows the ladder to be installed at the use position with a smaller burden than conventional ones. More specifically, the ladder section 10 of the pit ladder device 100 can be automatically moved without the operator moving the ladder himself.

Further, the ladder part 10 of the present embodiment is connected to the interlocking part 20 when the car is not stopped at the lowest floor, and is not connected to the interlocking part 20 when the car is stopped at the lowest floor. It has a connecting portion 12 . Therefore, it is possible to prevent an increase in the size of the hoistway 200 while preventing contact between the car and the ladder portion 10 .

I will explain in detail. A ladder provided on the wall of the hoistway 200 needs to secure a certain distance from the wall so that a worker can step on it. In addition, when the car moves to the lowest floor, the pit ladder needs to secure a distance from the stop position of the car in order to avoid interference between the pit ladder and the car. Therefore, providing a ladder on the wall of the hoistway 200 has led to an increase in the size of the hoistway 200 .

According to the present embodiment, when the car is not stopped at the lowest floor and the connecting portion 12 is connected to the interlocking portion 20, the ladder portion can be opened when the landing door 91 is opened. 10 moves to the use position. On the other hand, when the car is stopped at the lowest floor and the connecting portion 12 is not connected to the interlocking portion 20, the ladder portion 10 cannot be used when the landing door 91 is opened. Since it does not move to a position, it does not come into contact with the car. That is, the car does not stop at the lowest floor when the ladder section 10 is in the use position. Therefore, when the ladder part 10 is in the use position, it is not necessary to secure both the distance between the wall and the ladder part 10 and the distance between the car stop position and the ladder part 10, and the hoistway 200 size expansion can be prevented.

In addition, since the interlocking portion 20 of the present embodiment is composed of the rope 22, the structure is simpler and less expensive than when the interlocking portion 20 is composed of another mechanical configuration. In addition, since the connecting portion 12 of the present embodiment is also connected to and disconnected from the interlocking portion 20 by the hook 12a, the structure is simpler and less expensive than when the connecting portion 12 is formed by other mechanical structures. is.

Furthermore, since the ladder section 10 has the lower rollers 11 at the lower end, the movement of the ladder section 10 from the storage position to the use position is performed smoothly.

Although the embodiment has been described above, the present disclosure is not limited to this embodiment, and modifications will be shown below.

In the embodiment, the interlocking part 20 has a structure using the rope 22, but in order to solve the problem, any structure that can move the ladder part 10 by using the opening and closing of the landing door 91 as a driving force is required. It can be anything, for example, it can be composed of other mechanical structures.

In the embodiment, the landing door 91 is configured by the landing door 91a that moves to the left in the door opening operation and the landing door 91b that moves to the right. It is also applicable to For example, in the case of a configuration in which both of the two landing doors move to the right, the fittings 93 are attached to the bottom of both of the landing doors, and both are placed under the rope 22 like the fittings 93b of the embodiment. may be attached to the Moreover, the number of mounting metals 93 may be one.

In the embodiment, the use position of the ladder part 10 is the front of the landing, but the use position may be any position where it is easier for the worker to use the ladder to get down to the pit than the stored position. 3 or FIG. 4 as the retracted position may be used as the use position, and the retracted position may be moved from the retracted position farther from the hall.

10 Ladder Part 10a Upper Roller 11 Lower Roller 12 Connection Part 12a Hook 12b Lever 12c Roller 12d Weight 20 Interlocking Part 21, 21a, 21b Pulley 22 Rope 23, 23a, 23b Stopper 80 cam, 91, 91a, 91b landing door, 92 landing threshold, 92a slit, 93, 93a, 93b fitting metal, 94 guide, 100 pit ladder device, 200 hoistway, 201 car position

Claims (4)

an interlocking unit that is connected to a landing door on the lowest floor of a building provided with an elevator device and that operates using the opening and closing of the landing door as a driving force;
a ladder unit that is connected to the interlocking unit, moves to a use position used by a worker in conjunction with the door opening operation of the landing door, and moves to a storage position in conjunction with the door closing operation of the landing door;
Pit ladder device with. The ladder section is
The elevator apparatus has a connecting portion that connects to the interlocking portion when the car does not stop at the lowest floor and does not connect to the interlocking portion when the car stops at the lowest floor. 2. The pit ladder apparatus according to 1. The interlocking part is
at least two pulleys provided in the opening/closing direction of the landing door;
A looped rope connected to the landing door and hung on both of the two pulleys;
has
The connecting part is
a hook for hooking the rope;
a lever that is operated when the car of the elevator apparatus is stopped at the lowest floor to release the rope from being caught by the hook;
3. The pit ladder apparatus according to claim 2, further comprising: The pit ladder apparatus according to any one of claims 1 to 3, wherein the ladder section has a lower roller at its lower end.

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