JPH0867442A - Elevator pit inside going in and out device - Google Patents

Abstract

PURPOSE: To conduct pit inside going in and out in a short time and at the same time improve safety by preventing the fall of an outsider into the pit. CONSTITUTION: A three-way frame door 12 is provided openably/closably at an elevator hall three-way frame 11, and a key device to lock its closed state is provided at the three-way frame door 12. Also, a rear part room 23 into/out of which going is possible from the three-way frame door 12 is provided at the rear of the hall three-way frame 11 with an ascent/descent passage overlooked, and it is so arranged that a ladder or the like can be left housed in the rear room 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator pit entry / exit device for an operator to enter / exit a pit located at the bottom of a hoistway for inspection work or picking up fallen objects.

[0002]

2. Description of the Related Art FIG. 5 is a front view showing an example of a conventional elevator hall. In the figure, 1 is a three-sided landing frame, 2 is a door for opening and closing a doorway, 3 is a door for a landing 2
An unlocking device 4 provided on the upper part of the floor for opening the landing door 2 from the landing side is a floor. FIG. 6 is a front view showing a conventional method for entering and leaving the pit, and 5 is a ladder hung between the floor 4 and the inside of the pit.

In the conventional elevator as described above,
When workers enter or exit from the hall to the pit at the bottom of the hoistway, first, the ladder 5 installed in the elevator machine room
Is taken out to the lowest floor by the elevator and placed on floor 4. Then, the car (not shown) is stopped on the floor above the first floor, and the stairs return to the lowest floor. After this, the unlocking device 3 is operated to open the door 2 at the landing, and the ladder 5 is installed as shown in FIG.

[0004]

In the conventional method for moving in and out of the pit as described above, it takes a long time to move the ladder 5 and there is a problem that the working efficiency is low. Also,
There is also a problem that a third person may fall into the pit because the door 2 of the hall is opened.

The present invention has been made to solve the above-mentioned problems, and it is possible to move in and out of a pit in a short time and improve working efficiency. It is an object of the present invention to obtain an elevator pit entry / exit device capable of preventing a third party from falling into the pit and improving safety.

[0006]

According to a first aspect of the present invention, an elevator pit entrance / exit device locks a three-way frame door openably and closably mounted on a three-way frame of a landing and a closed state of the three-way frame door. And a rear chamber that is provided behind the three-way frame of the hall facing the hoistway and that can be accessed via a three-way frame door.

The elevator pit entrance / exit device according to a second aspect of the present invention is, in addition to the device of the first aspect, a safety switch operated by opening / closing a three-way frame door, and a safety switch connected to the safety switch. And a driving control unit for stopping the car when the door is opened.

[0008]

According to the first aspect of the invention, when the worker enters and leaves the pit, the key device is operated to open the three-way frame door,
Get off from the rear room into the pit.

According to the second aspect of the present invention, the safety of the work is improved by automatically stopping the car when the three-way frame door is opened.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Example 1. 1 is a front view showing an elevator pit entrance / exit device according to Embodiment 1 of the present invention, FIG. 2 is a plan view of FIG. 1, and the same or corresponding parts as in FIGS. The description is omitted.

In the figure, 11 is a three-way landing frame of the first embodiment, 12 is a three-way frame door that is provided on the three-way landing frame 11 so as to be openable and closable, and 13 is a three-way frame door 12 that is rotatable on the three-way landing frame 11. A hinge to be supported, 14 is a handle fixed to the three-way frame door 12, 15 is a key operation unit provided on the three-way frame door 12, and 16 is a key portion provided at the upper and lower ends of the three-way frame door 12. The key part 16 of the three-way frame door 1 is operated by the operation of the key operation part 15.
Appears from 2. Reference numerals 17 and 18 denote an upper keyhole and a lower keyhole into which the key portion 16 is inserted. The key device of the first embodiment is composed of a key operation portion 15, a key portion 16 and upper and lower keyholes 17 and 18.

Reference numeral 19 is a safety switch cam fixed to the three-way frame door 12, 20 is a safety switch fixed to the hall three-way frame 11, and operated by the safety switch cam 19, 21
Is a detection unit connected to the safety switch 20, 22 is an operation control unit connected to the detection unit 21, and 23 is a rear chamber provided behind the three-way frame 11 of the landing, facing the hoistway, and accessible from the three-way frame door 12. Although not shown, the rear chamber 23 accommodates elevators such as ladders similar to conventional ones. Further, 24 is a car guide rail, and 25 is a weight guide rail.

When an operator enters and leaves the pit by using such a pit entrance / exit device, first, the key operation unit 15
Is operated from the floor 4 side to open the three-way frame door 12 and enter the rear chamber 23. Then, the ladder housed in the rear chamber 23 is installed and moved into the pit.

According to such a device for entering and leaving the pit,
Since the rear room 23 is provided behind the three-way frame 11 at the landing, a ladder or the like can be stored in the rear room 23, and the work of moving in and out of the pit can be done without the trouble of moving the ladder or the like. Can be done in a short time. Further, the landing door 2 may be kept closed, and even if the three-way frame door 12 is opened, its opening is smaller than the landing doorway, and the rear chamber 23 is located behind the three-way frame door 12. , It prevents the third person from falling into the pit and improves safety.

When the three-way frame door 12 is opened to enter and exit the pit, the safety switch cam 19 is separated from the safety switch 20, and this is detected by the detection unit 21. Then, the detection signal from the detection unit 21 is the operation control unit 22.
The car is stopped and the car is stopped, which improves the safety of work in the pit.

Although the car is simply stopped when the three-way frame door 12 is opened in the first embodiment, it may be stopped after the car is moved to a floor other than the lowest floor. Stopping between floors can be prevented, and accidents such as trapping accidents can be prevented. Further, the rear chamber 23 can also be used as a storage for storing equipment other than the ladder.

Further, the movement between the rear chamber 23 and the inside of the pit may be carried out by using an elevating tool other than the ladder. For example, if a dedicated trap is installed in the rear chamber 23, it is possible to move more safely. Furthermore, the configuration of the key device is not limited to that of the first embodiment.

Example 2. Next, FIG. 3 is a front view showing an elevator pit entrance / exit device according to Embodiment 2 of the present invention. In the second embodiment, the height dimension of the three-way frame door 12 is almost half that of the first embodiment, and thereby, the fall of the third party into the pit is more reliably prevented.

Embodiment 3 FIG. FIG. 4 is a front view showing an elevator pit entrance / exit device according to Embodiment 3 of the present invention. In the third embodiment, the landing door 2 of the three-way frame door 12 is used.
A hinge 13 is provided at an end portion on the side farther from, and three-way frame doors 12 are provided on the left and right sides of the landing three-way frame 11.

According to such a device structure, by opening the left and right three-way frame doors 12 as shown in the figure, the entrance and exit of the rear room 23 can be closed, and the entrance of a third person can be further prevented. It can be surely prevented.

In the third embodiment, the pit entrance / exit devices having the same structure are provided on the left and right sides of the three-way frame 11 of the hall. However, only one of them is provided with the three-way frame door 12 for preventing entry, and The rear chamber may not be provided on the one side.

[0022]

As described above, in the elevator pit entrance / exit device according to the first aspect of the present invention, a three-way frame door is provided on the landing three-way frame so as to be openable and closable, and the closed state is locked to the three-way frame door. In addition, a rear room that can enter and exit from the three-way frame door was installed facing the hoistway behind the landing three-way frame, so a ladder for moving between the rear room and the pit was installed in the rear room. Since it can be stored, it is possible to get in and out of the pit in a short time, and it is possible to improve working efficiency. Also, the doors of the landing can be kept closed, and the rear chamber is located behind the three-way frame door, so it is possible to prevent a third party from falling into the pit and improve safety. Also effective.

The elevator pit entrance / exit device according to the invention of claim 2 is a safety switch operated by opening and closing the three-way frame door and a car connected to the safety switch when the three-way frame door is opened. Since the operation control unit for stopping is provided, in addition to the same effect as the invention of claim 1,
This has the effect of improving the safety of work in the pit.

[Brief description of drawings]

FIG. 1 is a front view showing an elevator pit entrance / exit device according to Embodiment 1 of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view showing an elevator pit entrance / exit device according to Embodiment 2 of the present invention.

FIG. 4 is a front view showing an elevator pit entrance / exit device according to Embodiment 3 of the present invention.

FIG. 5 is a front view showing an example of a conventional elevator hall.

6 is a front view showing a method for moving in and out of a pit from the hall of FIG.

[Explanation of symbols]

11 three-way frame, 12 three-way frame door, 15 key operation part,
16 key parts, 17 and 18 upper and lower keyholes, 20 safety switch, 22 operation control part, 23 rear chamber.

Claims (2)

[Claims] 1. A three-way frame door that is openably and closably mounted on a three-way frame of a hall, a key device for locking the closed state of the three-way frame door, and a rear side of the three-way frame of the hall facing the hoistway. An elevator pit entrance / exit device, comprising: a rear chamber that can enter and exit from the three-way frame door. 2. A safety switch which is operated by opening and closing the three-way frame door, and an operation control unit which is connected to the safety switch and stops the car when the three-way frame door is opened. The elevator pit entrance / exit device according to claim 1.