CN110615342A - Elevator maintenance safety device - Google Patents

Abstract

The invention provides an elevator maintenance safety device, which can safely make a push switch operate when a maintenance worker performs maintenance work in a pit. The elevator maintenance safety device is characterized by: a landing door that opens and closes along the door track and the landing threshold, a switch that operates when the landing door is in the fully open position, and a switch that prevents The closing direction movement preventing mechanism of the landing door moving in the closing direction allows the landing door to move to the full open position by the start operation of pit maintenance work and allows the landing door door to move to the full open position by the completion operation of pit maintenance work. The opening and closing permission mechanism that moves in the closing direction controls the power supply of the elevator through the above-mentioned switch.

Description

Elevator maintenance safety device

technical field

The invention relates to an elevator maintenance safety device.

Background technique

In the elevator, since there is maintenance equipment in the hoistway portion of the hoistway, maintenance workers perform maintenance work in the hoistway of the hoistway. In the case of maintenance work in the pit, open the locking device of the landing door, use a limiter or the like to prevent the locking of the landing door that is automatically locked, and operate the push switch that cuts off the power supply.

Among them, in order to avoid interference with the elevator car, etc., the push switch is installed near the entrance and exit of the lifting path, such as under the threshold of the entrance and exit. However, in order to operate the push switch, it is necessary to stick out the body in the lifting path, and there is a possibility of slipping into the pit. of danger.

Patent Document 1 discloses a device that automatically operates a push switch when a maintenance worker unlocks a lock device.

prior art literature

Patent Document 1: Japanese Patent No. 5743023

In the device described in Patent Document 1, the push switch is automatically actuated when the locking device of the landing door on the lowest floor is opened. Therefore, although the push switch operates reliably, there is a problem that the push switch also operates when the landing door on the lowest floor is opened by closing the elevator or the like.

Contents of the invention

An object of the present invention is to provide a maintenance safety device for an elevator that can safely operate a push switch when a maintenance worker performs maintenance work in a pit.

method used to solve the problem

From the above, the present invention is constituted as "a safety device for elevator maintenance, which has a landing door that opens and closes along the door track and the landing threshold, a switch that operates when the landing door is in a fully open position, and prevents The closing direction movement prevention mechanism that moves the landing door in the closing direction when the landing door is in the fully open position allows the landing door to move to the fully open position by the start operation of the pit maintenance work and the end operation of the pit maintenance work The opening and closing mechanism that allows the landing door to move in the closing direction, and controls the power supply of the elevator through the switch.

Invention effect

According to the present invention, it is possible to provide an elevator maintenance safety device capable of safely operating a push switch when a maintenance worker performs maintenance work in a pit.

Description of drawings

Fig. 1 is a side view showing the overall structure of an elevator.

Fig. 2 is a view of a boarding point door according to an embodiment of the present invention viewed from the elevator path side.

Fig. 3 is a diagram showing a state where a boarding point door is opened during maintenance work according to an embodiment of the present invention.

Fig. 4 is a cross-sectional view of a landing door according to an embodiment of the present invention.

FIG. 5 is a diagram of a series of processes of the present invention.

In the figure: 1—lifting path, 2—elevator point, 3—pit well, 4—car, 5—counterweight, 6—traction machine, 7—control panel, 8—governor, 9—buffer , 10—guide rail, 11—seismic monitor, 12—floor station door, 13—locking device, 14—position switch, 15—door hook, 16—door track, 17—floor station threshold, 18—for maintenance work Limiter, 19—limiter hanging rod, 20—limiter position fixing device, 21—door door opening and closing protection components.

Detailed ways

Hereinafter, embodiments of the elevator maintenance safety device of the present invention will be described with reference to the accompanying drawings. Moreover, the same code|symbol is attached|subjected to the common member in each drawing.

Example 1

Fig. 1 is a side view showing the overall structure of an elevator. In Fig. 1, 1 is the lifting path of the elevator, 2 is the boarding point of the elevator, and 3 is the pit of the lifting path. The boarding point 2 is provided on each floor where the elevator stops, and in the illustrated example, 2a is the boarding point on the lowest floor such as the first floor, and 2b is the second floor. The pit 3 is the part from the lowermost stop position to the bottom of the lifting path.

4 is the car of the elevator, and 5 is the counterweight. The car 4 and the counterweight 5 move up and down in the lifting path 1 in opposite directions.

6 is a traction machine, 7 is a control panel, and 8 is a speed regulator. In the elevator without a machine room, the traction machine 6 , the control panel 7 , and the speed controller 8 are arranged in the hoisting path 1 . In an elevator having a machine room, the hoisting machine 6, the control panel 7, and the speed controller 8 are installed in the machine room. The operation of the traction machine 6 is controlled by the control panel 7 . The governor 8 is a device for stopping the car 4 when the car 4 operates at an abnormal speed.

9 is a buffer. The buffer 9 is arranged in the lifting path 1 . The buffer 9 is a device for reducing the impact when the car 4 or the counterweight 5 collides with the bottom of the lifting path.

10 is guide rail. The guide rail 10 guides the lifting of the car 4 and the counterweight 5 in the lifting path 1 . 11 is an earthquake monitor. When the seismic monitor 11 is needed, it is installed in the pit 3 .

12 is a landing door, and 13 is a locking device. The boarding point door 12 is arranged on the boarding point 2 . The boarding point door 12 is closed by the locking device 13 so that it cannot enter the elevator path 1 . In addition, symbols a or b indicating the boarding point of the lowest floor, ie, the first floor and the second floor, are attached to the boarding point door 12 and the locking device 13 .

14 is a push switch. The push switch 14 is arranged in the lifting path 1 or the pit 3 . By making the push switch 14 act, the power supply of the elevator is cut off, and the car 4 and the counterweight 5 cannot be lifted or lowered.

Fig. 2 is a view of a boarding point door according to an embodiment of the present invention viewed from the elevator path side. In addition, this landing door is an example of a structure of, for example, a first floor which is a boarding point on the lowest floor when a maintenance worker performs maintenance work in a pit.

In Fig. 2, 15 is a door hook, 16 is a door track, and 17 is a landing threshold. Door hooks 15 , door tracks 16 , and landing thresholds 17 are arranged in the lifting path 1 . The door hook 15 lifts the landing door 12, and opens and closes the landing door 12 along the door track 16 and the landing threshold 17. The landing door 12 is an automatic closing structure.

The locking device 13 is arranged between the door hooks 15, and it cannot be opened from the boarding point 2 as long as the special key is not used to unlock it from the boarding point 2.

18 is a limiter for maintenance work, 19 is a limiter hanging rod, and 20 is a limiter position fixing device. The stopper 18 for maintenance work and the stopper hanging rod 19 are installed in the boarding point door 12 . The stopper position fixing device 20 is provided on the stopper 18 for maintenance work, and the stopper 18 for maintenance work is pushed toward the direction of the landing threshold 17 by the stopper position fixing device 20 . In Embodiment 1, the stopper position fixing device 20 is used as a spring device. The stopper hanging rod 19 suppresses the stopper 18 for maintenance work so as not to move or vibrate, and the stopper position fixing device 20 suppresses the stopper 18 for maintenance work from coming into contact with the landing threshold 17 . 21 is a landing door opening and closing protection component. The boarding point door opening/closing protection member 19 is provided in the boarding point threshold 17 .

In Fig. 2, 14 is a push switch. In the case of the present invention, the push switch 14 is arranged in the opening direction of the boarding point door 12, and is in a relationship in which the boarding point door 12 operates at the fully open position. The fully open position of the boarding point door 12 is demonstrated with FIG. 3. FIG.

Fig. 3 is a diagram showing a state in which a boarding point door is opened during maintenance work in an embodiment of the present invention. The boarding station door 12 in Fig. 3 exemplifies the structure in an open state on the first floor as the lowest floor boarding point when the maintenance personnel perform maintenance work in the pit. When a maintenance worker performs maintenance work on the pit 3 , he unlocks the locking device 13 by using a special key from the boarding point 2 and opens the hall door 12 . The maintenance worker pushes the hall door 12 in the opening direction while pulling up the stopper 18 for maintenance work on the hall door 12 as a start operation of pit maintenance work.

When the boarding point door 12 is pushed in the opening direction while pulling up the stopper 18 for maintenance work, and reaches the fully open position of the boarding point door 12, it contacts the push switch 14, and the push switch 14 operates. At this time, the stopper 18 for maintenance work acts in the direction of the landing threshold 17 through the stopper position fixing device 20, and does not move upward unless the maintenance worker pulls it up. Therefore, as long as the maintenance operator does not start the pit maintenance work on the landing door 12, the maintenance work limiter 18 will come into contact with the landing door opening and closing protection member 21, and the landing door 12 will not be in contact with the push switch 14. contact, the push switch 14 will not act. Therefore, in another way, the fully open position of the landing door 12 is determined by the setting position of the opening and closing protection part 21 of the landing door.

In addition, the landing door 12 has an automatic locking structure. When the pit maintenance operation is started, the maintenance work limiter 18 contacts the landing door opening and closing protection part 21, and the locking of the landing door 12 is prevented and pressed. Action of bit switch 14.

When the maintenance worker completes the maintenance work in the pit 3 , the maintenance work stopper 18 is pulled up in a direction to close the landing door 12 as an operation to complete the maintenance work on the landing door 2 . By the end operation of the pit maintenance work, the interference between the maintenance work stopper 18 and the landing door opening and closing protection member 21 is released, and the landing door 12 can be locked. In addition, the boarding point door 12 is not in contact with the push switch 14, and the operation of the push switch 14 is cancelled. This structure prevents the elevator user from operating the push switch by mistake.

Fig. 4 is a cross-sectional view of a landing door according to an embodiment of the present invention. The boarding point door 12 is formed by bending a steel material into a U-shape, and a stopper 18 for maintenance work and a stopper hanger 19 are installed inside the door. A hole is provided in the landing door 12 below the landing door 12 so that the maintenance work stopper 18 protrudes toward the landing threshold 17 . The stopper 18 for maintenance work and the stopper hanging rod 19 are heights which can stand up and perform work so that a maintenance worker can perform a work easily. In addition, according to the embodiment of the present invention, even if the push switch 14 is provided above the lowest step, the maintenance worker can activate and release the push switch 14 safely and reliably.

FIG. 5 is a diagram showing a series of processes in the present invention. In this diagram, first, at time t0, the maintenance worker uses a special key from the boarding point 2 to unlock the locking device 13 . Next, the maintenance worker pulls up the maintenance work stopper 18 at time t1, pushes the landing door 12 in the opening direction while pulling it up, and stops at the position passing the landing door opening and closing protection member 21 at time t2. Lifting of the limiter 18 for maintenance work. Thus, the boarding point door 12 is prevented from moving in the closing direction by the boarding point door opening and closing protection member 21, and the boarding point door 12 at the fully open position contacts the push switch 14, and the push switch 14 operates, thereby , cut off the power supply of the elevator.

At time t3 after the maintenance work, the maintenance worker pulls up the stopper 18 for maintenance work again, and closes the landing door 12 while pulling it up. In the process of closing the landing door 12, the limiter 18 for maintenance work passes the position of the opening and closing protection part 21 of the landing door. At time t4, the landing door 12 and the position switch 14 are non-contact, and the position switch 14 returns Inactive state. Then, the boarding point door 12 is fully closed, and the lifting of the stopper 18 for maintenance work ends at an appropriate timing. In addition, the locking device 13 is released from unlocking at an appropriate time either automatically or by a maintenance worker. Thereby, the power supply of the elevator is restored.

In addition, the fully open position of the landing door 12 during normal operation is located closer to the center of the door than the installation position of the landing door opening and closing protection member 21, so that the operation of the push switch 14 when the landing door 12 is opened can be prevented. . The fully open position of the boarding point door 12 is shown as 30 in FIG. 5 .

In addition, in the above-mentioned embodiment, the structure for lifting the stopper 18 for maintenance work can also be used by setting the push switch 14 under the landing threshold 17 and pushing the stopper 18 for maintenance work to make the push switch 14 in place. The method of switch 14 action.

The feature of the elevator maintenance safety device of the embodiment of the present invention described above is: "has the landing door 12 that opens and closes along the door rail 16 and the landing threshold 17, and performs the maintenance when the landing door 12 is in the fully open position." The switch 14 that operates, the closing direction movement preventing mechanism 21 that prevents the movement of the landing door 12 in the closing direction when the landing door 12 is in the fully open position, and the movement of the landing door to the The above-mentioned fully open position and the opening-closing mechanism 18 that allows the above-mentioned landing door to move in the closing direction through the end operation of the pit maintenance operation control the power supply of the elevator through the above-mentioned switch 14".

Claims (4)

1. A safety device for elevator maintenance, characterized in that, have: A landing door that opens and closes along the door track and the landing threshold; Switches that operate when the above-mentioned landing doors are in the fully open position; Closing direction movement preventing mechanism, which prevents the above-mentioned landing door from moving in the closing direction when the above-mentioned landing door is in the fully open position; an opening/closing permitting mechanism that allows the landing door to move to the full open position when pit maintenance work is started, and allows the landing door to move in the closing direction when pit maintenance work is finished, Control the power supply of the elevator through the above switch. 2. The elevator maintenance safety device according to claim 1, characterized in that, The full open position of the landing door during normal operation is set narrower than the full open position. 3. The elevator maintenance safety device according to claim 1 or 2, characterized in that, Equipped with a locking device that can be operated from the boarding point, the elevator is put into a state for maintenance work by opening the locking device before starting the pit maintenance work. 4. The elevator maintenance safety device according to any one of claims 1 to 3, characterized in that: The closing direction movement prevention mechanism is a landing door opening and closing protection member provided on the landing threshold, and the opening and closing allowing mechanism is a maintenance work stopper, and the maintenance work stopper moves in the opening and closing direction together with the landing door. It moves and is lifted by the maintenance worker so that it can pass through the position of the above-mentioned landing door opening and closing protection member.