JP2003226477A - Emergency stop device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple-structured emergency stop device of an elevator having no safety problem. <P>SOLUTION: A slider consists of a first slider 21 moving downward to come into contact with the guide surface of a guide rail 4 and a second slider 30 moving upward to come into contact with the guide surface of the guide rail 4, and the first and second sliders 21 and 30 are disposed above and below a car 1 of the elevator, respectively. A connecting rod 10 fixed to a rope 7 of a speed adjuster is extended sideways of the car 1, and the connecting rod 10 is connected with the first and second sliders 21 and 30 by a connecting means. When a speed adjuster 6 is operated in moving the car 1 upward, the first slider 21 is operated; when the speed adjuster 6 is operated in moving the car 1 downward, the second slider 30 is operated. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator emergency stop device for pressing a slider against an elevator guide rail to make an emergency stop of a car.

[0002]

2. Description of the Related Art Generally, when a speed governor operates, an elevator operates a slider provided on a car through a connecting means connected to a speed governor rope. An emergency stop means for pressing the sliding surface of the rail against the guide surface of the guide rail to stop the car in an emergency is provided. The slider is usually provided only below the car and operates when the car descends at an abnormal speed.

However, recently, it has been proposed that the slider is operated not only when the car is lowered downward, but also when the car is abnormally above, so as to solve the problem associated with the abnormal upward movement. Related to this, Japanese Patent Laid-Open No. 3-21118
No. 1, JP-A-5-201644, and JP-A-9-
No. 165156 can be mentioned.

[0004]

In the above-proposed proposal, one sliding member is provided with an operation function in two directions, that is, a complicated structure. Others have a problem in safety because they electrically detect the trigger and operate the slider.

SUMMARY OF THE INVENTION An object of the present invention is to provide an elevator emergency stop device having a simple structure and having no safety problem.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a slide provided on a car through a connecting means connected to a governor rope when the governor operates. In an emergency stop device for an elevator, in which an operator is operated and the sliding surface of the slider presses and slides on the guide surface of the guide rail to stop the car, the slider is operated downward. The first slider that comes into contact with the guide surface of the guide rail and the second slider that moves upward and comes into contact with the guide surface of the guide rail. , The upper part and the lower part of the car, respectively, while the connecting rod fixed to the speed governor rope is provided so as to extend laterally to the car, and the connecting rod and the first and second slides are provided. The slider is the first slider when the governor is operating when the car is moving, by connecting the moving element to the connecting means. Is operated, the governor during the operation at the time of the car downward movement was configured to operate the second of the slider.

According to the above construction, the slider has one function in one direction, has a simple construction, and is mechanically operated, so that a highly safe one can be provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an emergency stop device for an elevator according to the present invention will be described below with reference to the drawings.

FIG. 1 is an overall configuration diagram of an elevator equipped with an elevator emergency stop device according to an embodiment of the present invention, FIG. 2 is a side view of an elevator car portion of FIG. 1, and FIG. 3 is a cage of FIG. FIG. 4 is an enlarged detailed view of the right side, FIG. 4 is an operation state diagram for explaining an operation state when the car is abnormally lowered downward, and FIG. 5 is an operation state diagram when the car is abnormally raised upward. FIG. 6 is a detailed view showing the engagement relationship between the pull-up link 21A and the elongated hole portion 10B during the operation of FIG.

1 to 3, reference numeral 1 is a car, and an upper frame 2 is provided on an upper part of the car 1 and a lower frame 3 is provided on a lower part thereof. 4 is a guide rail for guiding the car 1,
Reference numeral 5 is a rope for suspending the car 1, and the rope 5 is wound around a sheave (not shown) to move the car 1 up and down. A speed governor 6 is provided in a machine room (not shown), and a speed governor rope 7 is wound around the speed governor 6. Reference numeral 8 is a tension pulley for giving tension to the governor rope 6, and 9 is a tension weight. A connecting rod 10 is provided so as to extend laterally to the side of the car 1. The connecting rod 10 is fixedly connected to the governor rope 7 by a fixing jig 11. Oblong holes 10A and 10B are provided in the upper and lower portions of the connecting rod 10.

A pull-down lever 1 is provided in the upper slot 10A.
One end of the pull-down lever 1 is engaged with the pull-down lever 1
The other end of 2 is connected to the shaft 13A. 14A is shaft 13
It is a bearing body that supports A. 15 is a link 16 to the shaft 13
The upper connecting rod 15 is connected via A, and the upper connecting rod 15 moves to the right through the shaft 13A and the link 16A when the pull-down lever 12 rotates downward. Reference numeral 17 is a restraining spring for positioning the upper connecting rod 15 at a predetermined position. The other end of the upper connecting rod 15 has a link 16 fixed to the shaft 13B.
It is connected to B. A pull-down link 18 is connected to the shaft 13B. 19A is a pull-down rod coupled to the shaft 13A via a link (not shown), 19B is a pull-down rod coupled to the pull-down link 18, and the upper ends of these pull-down rods 19A and 19B are the braking bodies 20A and 20B.
B sliders 21A and 21B are connected.

On the other hand, one end of a pulling lever 22 is engaged with the lower elongated hole portion 10B, and the other end of the pulling lever 22 is connected to a shaft 23A. 24
A is a bearing body that supports the shaft 23A. 25 is a shaft 23A
Is a lower connecting rod connected to the pulling lever 22 via a link (not shown).
When it rotates upward, it moves leftward via the shaft 23A and a link (not shown). Reference numeral 26 is a restraining spring for positioning the lower connecting rod 25 at a predetermined position. The other end of the lower connecting rod 25 has a shaft 23
It is connected to a link (not shown) fixed to B.
A pull-up link 27 is connected to the shaft 23B. 28
A is a pulling rod connected to the shaft 23A via a link (not shown), 28B is a pulling rod connected to the pulling link 27, and these pulling rods 28A, 28
The upper end of B is the sliders 30A, 3 of the braking bodies 29A, 29B.
It is connected to OB.

Next, the operation will be described with reference to FIGS.

In FIG. 4, when the car 1 is now abnormally lowered, the governor 6 operates and locks the movement of the governor rope 7. Therefore, the connecting rod 10 is also locked. When the car 1 is lowered in this state, the pulling lever 22 is moved upward in the arrow direction by the elongated hole portion 10B. This upward movement causes the shaft 23A to rotate, and the rotation of the shaft 23A causes a pulling rod 28A to pass through a pulling link (not shown).
Is lifted, the slider 30A moves upward, and presses and slides on the guide surface of the guide rail 4. On the other hand, the rotation of the shaft 23A moves the lower connecting rod 24 to the left, and the shaft 23B
To rotate the pulling link 27 to rotate the pulling rod 2
Move up 8B. The slider 30B moves upward due to the upward movement of the pulling rod 28B and presses and slides on the guide surface of the guide rail 4.

The sliding force of the sliders 30A, 30B with respect to the guide rail 4 causes a braking force to be generated.
Is prevented from falling. At this time, the upper pull-down link 12
The engaging portion between A and the long hole portion 10A is an intermediate portion of the long hole portion 10A as shown in FIG. In this state, the restraining spring 17
Of the upper connecting rod 15 and the pull-down lever 12
Remain in place. Therefore, the braking bodies 20A, 2
0B does not work at all.

Next, when the car 1 rises abnormally, the governor 6 operates to lock the movement of the governor rope 7. Therefore, the connecting rod 10 is also locked. When the car 1 is lowered in this state, the pull-down lever 12 moves the elongated hole portion 10A.
Is moved in the downward direction (arrow direction). By this downward movement, the shaft 13A rotates, the pull-down rod 19A is pulled down via a pull-down link (not shown), and the slider 21
A moves downward and presses and slides on the guide surface of the guide rail 4.
On the other hand, by rotating the shaft 13A, the upper connecting rod 15
Moves to the right and rotates the shaft 13B to pull down the link 1
Rotate 8 to move down the pulling rod 19B. The downward movement of the pull-down rod 19B causes the slider 21B to move downward to press and slide on the guide surface of the guide rail 4.

The sliding force of the sliders 21A, 21B with respect to the guide rail 4 causes a braking force to be generated.
Is prevented from rising. At this time, the lower pulling link 21
The engaging portion between A and the long hole portion 10B is an intermediate portion of the long hole portion 10B as shown in FIG. In this state, the restraining spring 26
Of the lower connecting rod 25 and pulling lever 2
2. The pulling rods 28A and 28B are maintained in the fixed positions. Therefore, the braking bodies 29A and 29B do not operate at all.

Note that the car 1 sways due to the magnitude of deceleration accompanying the stop of the car 1 at this time, and the sway causes the tension of the governor rope 7 to be released, and the car 1 is grasped once. The lock by the governor 6 which has been operated is released.
Due to this release, the car 1 may run again.
In order to solve this problem, as shown in FIG. 6, the car 1 is moved up to the middle position of the lower elongated hole portion 10B while the connecting rod 10 is stopped, and the lifting lever 22 and the elongated hole of the connecting rod 10 are moved. A lock body 31 is provided which engages with the pull-up lever 22 and maintains this state when the portion 10B is located in the middle portion. As described above, according to the embodiment of the present invention, the independent braking bodies 20A and 20B and the braking bodies 29A and 29B provided on the upper portion and the lower portion of the car 1, respectively, cause abnormal rise and fall of the car 1. Operates independently when abnormal. Therefore, not only the structure is simple, but also the device with high safety can be provided because it is mechanically operated.

[0019]

As described above, according to the present invention,
The slider has one function in one direction and has a simple structure.
Since it operates mechanically, a highly safe product can be provided.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an elevator including an elevator emergency stop device according to an embodiment of the present invention.

FIG. 2 is a side view of the car portion of FIG.

FIG. 3 is an enlarged detailed view of the right side of the car of FIG.

FIG. 4 is an operation state diagram for explaining an operation state when the car is abnormally lowered downward.

FIG. 5 is an operation state diagram for explaining an operation state when the car is abnormally raised upward.

FIG. 6 is a drawing link 21A and an elongated hole portion 10 during operation of FIG.
It is a detailed view showing an engagement relationship with B.

[Explanation of symbols]

1 car 4 guide rails 6 speed governor 7 governor rope 10 Connecting rod 12 Pull-down lever 15 Lower tie rod 18 Downlink 19A, 19B Down rod 20A, 20B braking body 21A, 21B slider 22 Lifting lever 25 Upper connecting rod 27 Pull-up link 28A, 28B Lifting rod 29A, 29B Braking body 30A, 30B slider 31 Rock body

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yasuhide Hano             1070 Ichimo, Hitachinaka City, Ibaraki Prefecture Stock Association             Hitachi Systems Building Systems Group (72) Inventor Masayuki Shigeta             2 days at 832 Horiguchi, Hitachinaka City, Ibaraki Prefecture             Tachimito Engineering Co., Ltd. (72) Inventor Kaoru Kurosawa             1070 Ichimo, Hitachinaka City, Ibaraki Prefecture Stock Association             Hitachi Systems Building Systems Group F-term (reference) 3F304 CA13 DA32 DA49 DA50

Claims (3)

[Claims] 1. When a speed governor operates, a slider provided on a car is operated through a connecting means connected to a speed governor rope, and a sliding surface of the slider causes a sliding surface of the guide rail. In an emergency stop device of an elevator configured to press and slide on the guide surface of to stop the car, a first slider that moves the slider downward to contact the guide surface of the guide rail, It is composed of a second slider that moves upward and contacts the guide surface of the guide rail.
Second sliders are arranged at the upper part and the lower part of the car, respectively, while a connecting rod fixed to the governor rope is provided so as to extend laterally to the car, and The first and second sliders are connected by a connecting means, and the first slider is operated when the governor is operating when the car is moving up, and the governor is operating when the car is moving down. Is an elevator emergency stop device characterized in that the second slider is operated. 2. An elongated hole portion is formed in an upper portion and a lower portion of the connecting rod, and in a normal state, the upper connecting means is an upper end of the upper elongated hole portion, and the lower connecting means is a lower end of the lower elongated hole portion. It is characterized in that when the connecting rod is moved upward, only the lower connecting means is moved upward, and when the connecting rod is moved downward, only the upper connecting means is moved downward. The elevator emergency stop device according to Item 1. 3. The elevator emergency stop device according to claim 2, wherein the lower elongated hole portion of the connecting rod is provided with means for maintaining the upper moving state when the lower connecting means moves upward.