JPH0569042U - Elevator governor - Google Patents

Abstract

(57) [Summary] [Structure] A rope 111, which is hooked in a loop shape on a pair of sheaves 1 and 2 provided on each of the upper and lower sides of a hoistway, and is connected to a cage via a hitch member, and the pair of sheaves. Fly weights 10 and 11 provided on one side of the sheave 1 so as to open and close according to the rotational speed of the sheave 1, and a first stage overspeed switch 35 whose operation is released by the open fly weights 10 and 11. Rope catch mechanism 32
In the speed governor of the elevator equipped with, the damper 18 for preventing the flyweight from suddenly opening greatly is provided. [Effect] Even if a passenger jumps in the car 101, the flyweights 10 and 11 are prevented from being suddenly and greatly opened. Therefore, the operation of the elevator will not be stopped without operating the first stage overspeed switch 35 or the rope catch mechanism 32.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a governor for an elevator, which prevents malfunction of a governor used to automatically prevent the fall of a car when an elevator car has an abnormally increased fall speed.

[0002]

[Prior Art]

 As a conventional traction elevator, for example, the one shown in FIG. 4 is general. In the figure, reference numeral 101 is an elevator car that moves up and down in a hoistway of a building, and one end of a main rope 102 is fixed to the car 101. The main rope 102 is a hoisting sheave 103 It is fixed to one end of a counterweight 105 via a car 104. A hoist (not shown) rotates the hoisting sheave 103 with the power equivalent to the weight of the unbalanced load of the car 101 and the unbalanced weight 105, and vertically moves the car 101.

Even if there is no failure in the hoisting machine, the speed of the car may increase abnormally due to the large load that exceeds the carrying load. In addition, overspeed may occur even if the power supply, the motor itself or its circuit fails.

Therefore, a safety device 106 for turning off the power source of the electric motor when the overspeed of the car 101 is detected is provided in the upper machine room of the hoistway. That is, sheaves 107 and 108 are provided on the upper and lower sides of the hoistway, and a governor rope 111 is connected to the car 101 via a hitch member 112 on the sheaves 107 and 108. The speed governor rope 111 circulates between the sheaves 107 and 108 as the car 101 moves up and down, and when the car 101 starts to overspeed due to the accident or the like, the speed governor 114 provided on the sheave 107 causes The first-stage overspeed switch 113 is operated to cut off the input to the electric motor to stop the car 101 in an emergency.

[0005]

[Problems to be solved by the device]

 If a passenger jumps in the car 101 or is mischievous (disturbance), the car 101 is temporarily abruptly accelerated / decelerated, and the car 101 is transiently overspeeded. Then, the speed governor rope 111 and the sheave 107 also transiently overspeed via the hitch member 112. The transient overspeed of the sheave 107 causes the speed governing mechanism 114 to actuate the first-stage overspeed switch 113 and eventually stop the operation of the car 101.

By the way, when disturbance occurs in the car 101, in order to prevent the disturbance from being transmitted to the governor rope 111, a hitch member 112 for buffering disturbance is provided between the car 101 and the governor rope 111. However, since the hitch member 112 has a limited buffering function, in the case of a large disturbance, the hitch member 112 is inevitably transmitted to the speed governor rope 111, and the above problems still occur.

An object of the present invention is to provide a speed governor for an elevator in which the speed governor is not operated in order to prevent the operation of the car from being stopped even if the passenger mischievously jumps in the car. And

[0008]

[Means for Solving the Problems]

 In order to achieve such an object, according to the present invention, a pair of sheaves arranged on the upper and lower sides of a hoistway are hooked in a loop and connected to a car through a hitch member. A rope, a flyweight provided on one of the pair of sheaves so as to open and close according to the rotation speed of the sheave, a first stage overspeed switch and a rope which are deactivated by the open flyweight. An elevator governor equipped with a catch mechanism is provided with a damper that prevents the flyweight from opening suddenly and greatly.

[0009]

[Action]

 If a passenger jumps in the car while the elevator is running (disturbance), the car will transiently start accelerating and decelerating. When the car starts to accelerate or decelerate suddenly, the sheave also tries to transiently accelerate or decelerate via the rope. Since the sheave is provided with a damper, the damper prevents the flyweight from opening suddenly and greatly, and prevents the first-stage overspeed switch and the rope catch mechanism from trying to operate.

[0010]

【Example】

 Hereinafter, the present invention will be described with reference to the drawings. 1 to 3 are views showing an embodiment of an elevator governor according to the present invention. In this embodiment, the same parts as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 1, in a hoistway in which a car 101 is arranged so as to be vertically movable, sheaves 1 and 2 are arranged on the upper and lower sides, respectively, and the sheaves 1 and 2 have a speed control. The machine rope 111 is hung in a loop. A tension weight 4 is attached to the lower sheave 2 in order to give tension to the governor rope 111, and the tension weight 4 is engaged with and guided by the guide member 5 and is movable in the vertical direction. Is.

As shown in FIG. 2, the sheave 1 is provided in a casing 8 on an overhead beam 7, and the sheave 1 is provided with a speed adjusting mechanism 9. That is, a pair of flyweights 10 and 11 are provided on one side of the sheave 2 so as to be able to swing (open and close) around pins 12 and 13, and the tip ends 10a and 11a of the flyweights 10 and 11 are connected to the base end. It is formed wider than the sides 10b, 11b, so that the center of gravity is at the tip sides 10a, 11a. Further, elastic contact bodies 10c and 11c are provided on the inner side of the tip sides 10a and 11a of the pair of flyweights 10 and 11, respectively, which are elastically attached to a support shaft 14 which rotatably supports the sheave 2. Can abut. An interlocking rod 15 is installed between the flyweights 10 and 11 so that the flyweights 10 and 11 can be opened and closed at the same time.

Between the base end side 10 b of the flyweight 10 and the receiving member 16, a compression spring 17 is contracted and a microminiature damper 18 is interposed. The compression spring 17 urges the flyweights 10 and 11 to always close. As shown in FIG. 3, the microminiature damper 18 includes a rod head 19 having an insertion hole 19a, a piston rod 20 connected to the rod head 19, a piston 21 attached to the piston rod 20, and a piston 21. It is composed of a cylinder 22 in which is stored. The rod head 19 is connected to the base end side 10b via a pin 23. Hydraulic oil 24a is enclosed in the cylinder 22, and a cushioning material 24b is housed on the base end side (right side in FIG. 3). The cushioning material 24b has a sponge shape, has bubbles inside, and is for cushioning a sudden pressure change in the cylinder 22. A snap ring 25 is attached to the outer periphery of the cylinder 22 substantially at the center thereof, and the snap ring 25 is engaged with the receiving member 16. The piston rod 20 has a rod end 26 on the tip side (right side in FIG. 3), and the piston 21 is attached to the rod end 26.

A communication passage 26 is formed inside the rod end 26 and the tip end of the piston rod 20, and the communication passage 26 is formed between the outer peripheral surface of the piston rod 20 and the inner peripheral surface of the piston 21. 3 is communicated with a narrow orifice passage 27, and this orifice passage 27 is communicated with a communication passage 28 formed adjacent to the left side of the piston 21 in FIG. An oil seal 29 and a rod guide 30 are provided on the tip end side (left side in FIG. 3) of the cylinder 21, and the piston rod 20 is guided by the rod guide 30 in this reciprocating motion.

A governor rope 111 is hung on the sheave 1, and a rope catch mechanism 32 for fixing and holding the governor rope 111 is provided in the casing 8 as shown in FIG. That is, the outer peripheral edge portion of the sheave 1 in the casing 8 is provided with the first tripper 33 and the second tripper 34 having a cam portion.

When the sheave 1 rotates at a high speed, the flyweights 10 and 11 are opened, and the first tripper 33 is kicked first. Then, the first-stage overspeed switch 35 is released and the input to the electric motor is cut off, and the brake in the hoisting machine equipped with this electric motor brakes the hoisting machine sheave 103 and stops the car 101 in an emergency. I am trying.

Next, when the car 101 is not stopped still, the flyweights 10 and 11 kick the second tripper 34. Then, the lock lever 36 is released, and the pressing member 38 is rotated via the links 37a and 37b, and the pressing member 38 and the receiving member 39 cooperate to hold the rope 31 and the car 101 in two stages. I am trying to make an emergency stop.

If a passenger jumps in the car 101 while the elevator is running (disturbance), the car 101 transiently starts accelerating and decelerating. When the car 101 starts to accelerate / decelerate suddenly, the sheave 1 also tries to start transiently accelerating / decelerating via the governor rope 111. Then, the flyweights 10 and 11 open and try to kick the first tripper 33 and further the second tripper 34.

Since the microminiature damper 18 is attached to the base end side 10b of the flyweight 10, the base end side 10b connects the piston 21 to the base end of the cylinder 22 via the piston rod 20. Move to the side. At this time, the hydraulic oil 24a on the right side of the piston 21 in the cylinder 22 in FIG. 3 moves from the communication passage 26 to the orifice passage 27, and further moves from the communication passage 28 to the left side of the piston 21. At this time, the viscous damping force of the working oil acting on the piston 21 is proportional to the square of the moving speed of the piston 21, so that if the piston 21 moves rapidly, the piston 21 will have a large viscous damping force from the working oil 24a. You will receive power. Therefore, even if the sheave 1 is rapidly decelerated excessively, the flyweights 10 and 11 are prevented from being suddenly and greatly opened by the operation of the microminiature damper 18. Therefore, the flyweights 10 and 11 do not kick the first and second trippers 33 and 34, and the operation of the elevator is stopped without operating the first-stage overspeed switch 34 or the rope catch mechanism 32. Nothing goes away.

On the other hand, when the car 101 overspeeds due to an accident, the sheave 1 is also overspeeded via the speed governor rope 111, but the rotation of the sheave 1 at this time is different from that caused by the disturbance and is transient. There is no sudden acceleration / deceleration, but continuous acceleration / deceleration. Then, the movement of the piston 22 by the flyweight 10 is continuously performed. For this reason, the flyweights 10 and 11 are largely opened by the centrifugal force of the flyweights 10 and 11 that far exceed the viscous damping force that the piston 21 receives from the hydraulic oil for the above reasons, and the first tripper 33, and Kicks the second tripper 34 and activates the first-stage overspeed switch 35 and the rope catch mechanism 32 to stop the car 101 in an emergency.

[0021]

[Effect of the device]

 As described above, according to the present invention, since the damper that prevents the flyweight from suddenly opening greatly is arranged, the flyweight suddenly increases even if the passenger jumps in the car. It is prevented from opening. Therefore, the operation of the elevator will not be stopped without operating the first stage overspeed switch or the rope catch mechanism.

[Brief description of drawings]

FIG. 1 is an overall schematic view of an elevator in which an embodiment of an elevator governor according to the present invention is used.

FIG. 2 is a front view showing this governor.

FIG. 3 is a sectional view of this damper

FIG. 4 is an overall schematic diagram showing a conventional elevator.

[Explanation of symbols]

1 ... sheave, 10 ... fly weight, 18 ... damper,
32 ... Rope catch mechanism, 35 ... First stage overspeed switch, 111 ... Rope.

Claims (1)

[Scope of utility model registration request] 1. A rope, which is looped on a pair of sheaves provided on each of the upper and lower sides of a hoistway, and is connected to a cage via a hitch member, and the rotation of the sheave on one of the pair of sheaves. In a speed governor for an elevator equipped with a flyweight provided to open and close according to speed, a first stage overspeed switch and a rope catch mechanism whose operation is released by the open flyweight,
A speed governor for an elevator, wherein a damper is provided to prevent the flyweight from suddenly opening wide.