JPH0444532Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a governor device for an elevator, and particularly to a governor device installed at the bottom of a hoistway.

[Conventional technology]

A governor device is a safety device that forcibly stops an elevator car when it descends at a speed exceeding a predetermined speed due to a malfunction or abnormality, and is usually a machine installed at the top of the hoistway. installed in the room. However, depending on the building, the machine room may not be provided at the top of the hoistway. In such a case, as shown in FIG. 3, which is a vertical cross-sectional view of the hoistway, the governor device 1 is installed near the top of the hoistway 2, and the guide pulley 3 is installed at the bottom of the hoistway 2. A governor rope 5 is wound between a pulley 4 and a guide pulley 3 of the device 1. On the other hand, the rope connection lever 7, which is pivoted to the car 6 by a shaft 7a, allows the car 6 to
is connected to any point on the governor rope 5,
The governor pulley 4 is driven at the same speed as the car 6. When the car 6 descends at a speed higher than a predetermined speed due to a failure or abnormality, the governor device 1 is activated and the governor rope 5 is restrained by the rope grasping device 8. This rope grasping device 8 has a shaft 8a
Holder 8b configured to be rotatable around
, a spring 8d that biases the head 8c of the gripper 8b in the direction opposite to the shaft 8a (leftward in FIG. 3), and a locking portion 8e.
Therefore, when the governor device 1 is operated, the gripper 8b is rotated by gravity in the counterclockwise direction in FIG. The governor rope 5 is restrained by being pressed against the locking portion 8e. Therefore, when the car 6 descends, the rope connecting lever 7 rotates counterclockwise in FIG. 3 about the shaft 7a, and the connecting lever 9
By pulling up the pull lever 10 via the emergency stop device 11, a guide rail (not shown) is grabbed and the car 6 is forcibly stopped. In addition, 12 is the machine room 13
The drum of the drive device 14 installed at This is the main rope.

[Problem that the invention attempts to solve]

When the governor device 1 is installed at the top of the hoistway 2 as in the conventional device described above, it is necessary to provide an inspection port 2a in the hoistway 2 for maintenance and inspection of the governor device 1 and restoration work after the governor device 1 is activated. There is. Therefore, there was a problem in that a hole had to be made in the wall of a room completely unrelated to the elevator, and depending on the structure of the building, it was sometimes impossible to provide the inspection port 2a.

In order to solve this problem, a method has been considered in which the governor device 1 is installed at the bottom of the hoistway 2 and the guide pulley 3 is installed at the top of the hoistway as shown in FIG. However, in this case, since it is necessary to rotate the gripper 8b using gravity, the direction in which the governor rope 5 enters and exits the governor device 1 must be from below the governor device 1, so the guide pulleys 17 and 18 are Using governor rope 5
A new problem arose in that the direction of the guide pulleys 17 and 18 had to be changed for this purpose.

The present invention aims to solve the above problems.

[Means to solve the problem]

The present invention does not use gravity to rotate the gripper when restraining the governor rope as in the past, but instead uses a rope grasping shoe to press the governor rope against the pulley without using gravity. By preventing rotation, a frictional force is generated between the governor rope and the pulley, and the governor rope is more securely restrained.

[Effect]

According to the present invention, since the governor rope is restrained without using gravity, the governor rope can enter and exit the governor device from the top of the governor device. Since there is no need to change the direction of the governor rope, the governor device can be installed at the bottom of the hoistway without using a guide pulley.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a vertical sectional view of the hoistway corresponding to FIG. 3, and FIG. 2 is a detailed view of the governor device according to the present embodiment.

In the figure, 20 is a guide pulley installed near the top of the hoistway 2, 30 is a governor device according to this embodiment installed at the bottom of the hoistway, and the same reference numerals as in FIG. 3 indicate the same parts.

31 is a pulley that is pivoted to the cover 33 by a shaft 32, 34 is a pair of fly weights that are pivoted to the pulley 31 by a shaft 35, 36 is a connecting lever that connects both fly weights 34, 34, and 37 is a pulley that is pivoted to the cover 33 by a shaft 32; This is a tension spring attached between the claw portion 34a of the flyweight 34 and the pulley 31. Further, although the covers 33 are provided on both sides of the pulley 31, the one on the front side is omitted for convenience of explanation. 40 has shaft 4 at one end
A substantially L-shaped lever 42 is pivotally connected to the cover 33 by a shaft 43 at one end, and a threaded rod 4 passing through the lever 40 at the other end.
4 is a fixed lever, 45 is a compression spring provided between the lever 40 and a washer 46, and the washer 46 is fixed to the threaded rod 44 by a nut 47. In other words, the spring 45 causes the lever 40 to
is always urged to rotate counterclockwise about the shaft 41. Reference numeral 50 denotes a ratchet that is attached to a bracket 51 fixed to the cover 33 by a shaft 52, and has a claw portion 50a at one end and a roller 53 attached to the other end. This roller 53 normally engages with the recess 40a of the lever 40 to prevent the lever 40 from rotating in the counterclockwise direction. Reference numerals 54 and 55 are stoppers that restrict the rotation of the ratchet 50. 60 is a rope grasping shoe which is attached to the lever 40 by a shaft 61;
Normally, it faces the governor rope 5 wound around the pulley 31 with a slight gap therebetween.

Next, the operation of this embodiment will be explained.

When the car 6 descends at a predetermined speed or higher due to a failure or abnormality, the rotational speed of the pulley 31 rotating counterclockwise around the shaft 32 increases, and the centrifugal force causes the flyweight 34 to move against the spring 37.
rotates clockwise around axis 35,
The claw portion 34a opens outward and engages with the claw portion 50a of the ratchet 50. For this reason, Ratchet 50
rotates clockwise around the shaft 52 until it hits the stopper 55, and the roller 53 disengages from the recess 40a of the lever 40, so the lever 40 rotates counterclockwise around the shaft 41 due to the force of the spring 45. Rotate to. This allows the rope grasping screen 60
The governor rope 5 is pressed against the pulley 31 to restrain the governor rope 5. Further, in the case of this embodiment, since the rotation of the ratchet 50 is prevented by the stopper 55, the claw portion 5 of the ratchet 50
The claw portion 34a engages with the flyweight 34, thereby preventing the rotation of the flyweight 34 and, therefore, the rotation of the pulley 31. Therefore, in addition to the pressing force applied to the pulley 31 by the rope grasping shoe 60, the rotation of the pulley 31 is completely prevented by the fly weight 34 and the ratchet 50, so that there is a gap between the pulley 31 and the governor rope 5. Since a large frictional force acts, the governor rope 5 is more firmly restrained.

When restoring the governor device 30 of this embodiment, the ratchet 50 and the pawls 50a, 34a of the flyweight 34, which are engaged with each other, are disengaged, and the roller 53 is engaged with the recess 40a of the lever 40. That's fine.

As described above, according to this embodiment, the governor device 3
In order to prevent the rotation of the pulley 31 when 0 is activated,
By generating a frictional force between the pulley 31 and the governor rope 5, which did not exist in the past, the governor rope 5 can be reliably restrained without using gravity as in the conventional device.

In the above embodiment, the governor rope 5 enters and exits the governor device 30 from above, but since the present governor device 30 does not utilize gravity as described above, it can be adjusted depending on the space of the building. It can also be installed in For example, if the governor device 30 is installed by rotating it 90 degrees clockwise or counterclockwise in FIG. Since it can be entered and exited from below, hoistway 2
It can also be installed near the top of the Furthermore, if the governor device 30 is installed horizontally (with the shaft 32 in the vertical direction), the flyweights 34 rotate on a horizontal plane and are not affected by gravity, so stable operation can be expected. Furthermore, it is of course possible to install it at an angle if necessary.

[Effect of idea]

As explained above, according to the present invention, the governor rope can be reliably restrained without using gravity, so the governor rope can be installed even at the bottom of the hoistway without using a guide pulley. equipment can be provided.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a hoistway showing an embodiment of the present invention, Fig. 2 is a detailed view of a governor device according to an embodiment of the present invention, and Fig. 3 is a longitudinal cross-section of a hoistway using a conventional governor device. 4 are diagrams showing other examples using a conventional governor device. 2... hoistway, 5... governor rope, 6... car, 30... governor device according to an embodiment of the present invention, 31... pulley, 34... fly weight,
50...Rachet, 60...Rope grip shot.

Claims (1)

[Claim for Utility Model Registration] A governor rope that moves in synchronization with the rise and fall of an elevator car, a pulley around which the governor rope is wound, and a pulley that is pivoted opposite to each other on the side of the pulley and rotates due to centrifugal force. A flyweight, a rope grasping shoe disposed opposite to the pulley with the governor rope in between, and a lever to which the shoe is attached and constantly biasing the shoe toward the pulley by a spring. In an elevator governor device, the governor device is configured to be rotatable within a predetermined angular range, and is normally engaged with the lever to maintain a slight gap between the shoe and the governor rope;
When the flyweight shifts, it engages with the flyweight and rotates by a predetermined angle, and by blocking the rotation of the flyweight, the pulley is prevented from rotating, and the rotational movement of the flyweight by the predetermined angle causes it to engage with the lever. 1. A governor device for an elevator, comprising a ratchet configured to be detachable so that the shoe presses the governor rope against the pulley.