阅读说明：本技术 电梯的底坑梯子装置 (Pit ladder device of elevator ) 是由 福田治彦 西野隆博 于 2017-06-14 设计创作，主要内容包括：本发明提供一种在设置于电梯的升降通道的底坑内的底坑梯子装置中提高了设置性的电梯的底坑梯子装置。为了实现这一点,提供一种电梯的底坑梯子装置,其设置于电梯的升降通道的底坑内,用于供操作人员上下,该电梯的底坑梯子装置具备：托架,其一端侧安装于底坑壁；第一臂构件,其一端侧以能够旋转的方式安装于该托架的另一端侧；第二臂构件,其一端侧以能够旋转的方式安装于该第一臂构件的另一端侧；以及底坑梯子,其安装于该第二臂构件。(The invention provides a pit ladder device of an elevator, which is arranged in a pit of a lifting passage of the elevator and improves the arrangement performance. In order to achieve the above object, there is provided an elevator pit ladder device provided in a pit of a hoistway of an elevator for an operator to get on and off, the elevator pit ladder device including: a bracket, one end side of which is mounted on the pit wall; a first arm member having one end rotatably attached to the other end of the bracket; a second arm member having one end rotatably attached to the other end of the first arm member; and a pit ladder mounted to the second arm member.)

1. A pit ladder device of an elevator, which is provided on the inner side surface of a pit at a right angle to the front surface of an entrance of the elevator for an operator to get on and off,

it is characterized in that the preparation method is characterized in that,

the pit ladder device of the elevator is provided with:

a bracket, one end of which is mounted on the pit wall of the inner side surface of the pit;

a first arm member having one end rotatably attached to the other end of the bracket;

a second arm member having one end rotatably attached to the other end of the first arm member; and

a pit ladder mounted to the second arm member.

2. A pit ladder apparatus of an elevator according to claim 1,

the second arm member is provided with a biasing mechanism for biasing the pit ladder upward.

3. A pit ladder apparatus of an elevator according to claim 2,

two protruding portions are provided on the second arm member, the pit ladder is provided between the two protruding portions, and the urging mechanisms are provided on the two protruding portions, respectively.

4. A pit ladder apparatus of an elevator according to any one of claims 1 to 3,

pit ladder fixtures are arranged on the walls in the pit,

the second arm member is provided with an engagement mechanism that engages with the pit ladder fixing member.

5. A pit ladder apparatus of an elevator according to claim 4,

the pit ladder fixing piece is provided with a safety switch, and a switch part of the safety switch is pressed in a state that the pit ladder fixing piece is clamped with the clamping mechanism.

6. A pit ladder apparatus of an elevator according to claim 4,

the elevator taking hall doorsill for shielding the clearance between the elevator car and the access opening is arranged, the elevator taking hall doorsill and the pit ladder fixing piece are respectively provided with a sling holding part, a storage pull-out sling passes through the sling holding part, and two end parts of the storage pull-out sling are fixed by a sling stopper arranged on the clamping mechanism.

7. A pit ladder apparatus of an elevator according to claim 6,

the engagement mechanism is located on the hall sill in a state where the first arm member and the second arm member are substantially linearly arranged, and a groove that engages with the engagement mechanism is provided on the hall sill.

8. A pit ladder device of an elevator, which is provided on the inner side surface of a pit at a right angle to the front surface of an entrance of the elevator for an operator to get on and off,

it is characterized in that the preparation method is characterized in that,

the pit ladder device of the elevator is provided with:

a bracket, one end of which is mounted on the pit wall of the inner side surface of the pit;

a first arm member having one end rotatably attached to the other end of the bracket;

a second arm member having one end rotatably attached to the other end of the first arm member;

a pit ladder mounted to the second arm member;

a pit ladder mount mounted to the pit wall; and

an engaging mechanism provided on the second arm member and engaged with the pit ladder fixing member,

the first arm member is bent substantially 90 degrees with respect to the bracket and the second arm member is bent substantially 180 degrees with respect to the other end of the first arm member in a state where the second arm member is engaged with the pit ladder fixing piece.

9. A pit ladder apparatus of an elevator according to claim 8,

the pit ladder is provided with an L-shaped angle iron, a lower surface of the angle iron is arranged to face an upper surface of the second arm member, a bolt for connecting the angle iron and the second arm member is arranged, and an urging mechanism is arranged on the periphery of the bolt and urges the pit ladder upward so that a lower end portion of the pit ladder floats from the lowest portion of the pit.

10. A pit ladder apparatus of an elevator according to claim 8 or 9,

the pit ladder fixing member is provided with a safety switch which transmits a signal for allowing the ascending and descending operation of the car to a control panel of the elevator in a state where the pit ladder fixing member is engaged with the engagement mechanism, and transmits a signal for forcibly stopping the ascending and descending operation of the car to the control panel of the elevator in a state where the engagement between the pit ladder fixing member and the engagement mechanism is released.

Technical Field

The present invention relates to a pit ladder apparatus provided in a pit of a hoistway of an elevator.

Background

A space (space) in which a hole is bored in a floor of a lowermost floor called a pit is provided in a hoistway of an elevator. The pit is internally provided with machines required by elevators, such as a buffer, a limit switch and the like. When performing maintenance work such as inspection and repair, it is necessary to open the hall door of the lowermost elevator hall and allow an operator to move down from the opened entrance/exit of the hall to the pit at the lowermost part of the hoistway. After the completion of the work, it is necessary to go from the lowest pit to the entrance/exit of the elevator hall. Therefore, a pit ladder is provided in advance in the pit.

When performing maintenance work, an operator opens the landing door, and then pulls a pit ladder stored in an inner side surface substantially perpendicular to the front surface of the entrance/exit of the landing room to the landing door opening port using a hook bar, and fixes the ladder to the landing door sill. The pit ladder is attached to one end side of the bracket in proximity to the bracket. The other end side of the bracket is provided with a hinge which is installed at the entrance side of the elevator hall. The bracket rotates by taking the hinge as an axis, so that the pit ladder moves to the doorsill of the elevator taking hall. Then, the operator moves down to the lowermost portion by the drawn-up pit ladder to perform maintenance work. After the maintenance work is finished, the operator moves up to the elevator hall at the lowest floor by using the pit ladder, and moves the pit ladder to the storage position and fixes the pit ladder by using the hanging rod. The storage position of the pit ladder is set at a position not interfering with the lifting operation of the elevator car. Then, the opened hall door is closed, and the operation of the elevator is resumed. Such a prior art is disclosed in, for example, patent document 1 (japanese patent application laid-open No. 2007-62862).

Prior art documents

Patent document

Patent document 1: japanese patent laid-open publication No. 2007-62862

Disclosure of Invention

Problems to be solved by the invention

In the structure described in patent document 1, since the bracket is rotated by the hinge attached to the entrance of the elevator hall, the position of the pit ladder is defined by the length of the bracket. A guide rail for guiding the car to ascend and descend is generally attached to an inner side surface substantially perpendicular to a front surface on which an entrance of the elevator hall is provided. Since it is necessary to prevent the pit ladder from interfering with the car, it is also necessary to prevent the pit ladder from interfering with the guide rail. Therefore, the length of the bracket depends on the installation position of the guide rail, i.e., the depth from the entrance/exit of the elevator hall to the guide rail. Therefore, in the case of an elevator shaft having a large width and a small depth from the entrance/exit of the elevator hall, the structure described in patent document 1 cannot sufficiently secure the length of the carriage, and when the carriage is rotated to the entrance/exit of the elevator hall, the pit ladder cannot sufficiently reach the entrance/exit of the elevator hall, which prevents the operator from performing maintenance work.

Further, when the pit ladder attached to the bracket is pulled close to the entrance of the hoistway door, if there is a projection and recess in the lowermost part of the pit, the lower end of the pit ladder comes into contact with the projection and recess, and it is difficult to pull the pit ladder close.

An object of the present invention is to provide a pit ladder device for an elevator, which solves the above problems and improves installation performance.

In addition, the present invention has an object to provide a pit ladder device for an elevator, which can easily pull out a pit ladder.

Means for solving the problems

A pit ladder device for an elevator, which is provided in a pit of a hoistway of the elevator and is used for an operator to get on and off, the pit ladder device for the elevator comprising: a bracket, one end side of which is mounted on the pit wall; a first arm member having one end rotatably attached to the other end of the bracket; a second arm member having one end rotatably attached to the other end of the first arm member; and a pit ladder mounted to the second arm member.

In addition, the present invention is characterized in that the second arm member is provided with a biasing mechanism for biasing the pit ladder upward.

Effects of the invention

According to the present invention, a pit ladder device for an elevator having improved installation performance can be provided.

Further, according to the present invention, it is possible to provide a pit ladder device for an elevator, which can easily pull out a pit ladder.

Drawings

Fig. 1 is an external perspective view of a pit ladder apparatus housed in a pit according to an embodiment of the present invention.

FIG. 2 is a side view of a pit ladder apparatus housed within a pit, in accordance with an embodiment of the present invention.

Fig. 3A is an enlarged view of a portion a of fig. 2.

Fig. 3B is an enlarged view of a portion a of fig. 2.

Fig. 4A is an explanatory view of the operation of the pit ladder apparatus in the stored state.

Fig. 4B is an explanatory view of the operation of the pit ladder apparatus in a pulled-out state.

Fig. 4C is an explanatory view showing an operation of the pit ladder assembly in a state engaged with the landing threshold.

Fig. 5 is an external perspective view showing a state in which the pit ladder assembly is engaged with the landing threshold.

Fig. 6 is a front view showing a state in which the pit ladder assembly is engaged with the landing threshold.

Fig. 7A is an operation explanatory diagram showing a process in which the engagement mechanism engages with the hall sill.

Fig. 7B is an explanatory diagram showing an operation state of the engagement mechanism and the hall sill.

Fig. 8 is a schematic diagram of an elevator system including a pit ladder device of an elevator according to an embodiment of the present invention.

Detailed Description

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.