JP7624877B2 - Elevator governor - Google Patents

Description

This disclosure relates to elevator governors.

Conventionally, elevator governors are known that include an upper pulley, a lower pulley, a governor rope, and a governor weight. The upper pulley and the lower pulley are arranged at a distance from each other in the height direction. The governor rope is formed in an endless shape and is wound around the upper pulley and the lower pulley. The governor weight is attached to the lower pulley. By attaching the governor weight to the lower pulley, a preset tension acts on the governor rope.

The governor weight has a first weight provided on the lower pulley and a second weight provided on the first weight. The second weight is provided rotatably relative to the first weight. By rotating the second weight relative to the first weight, the second weight moves between a folded position in which the second weight is adjacent to the first weight in the lateral direction and an extended position in which the second weight is adjacent to the first weight below.

When applying a preset tension to the governor rope, the worker sets the position of the second weight to the folded position. When adjusting the length of the governor rope, the worker sets the position of the second weight to the extended position. When the second weight is in the extended position, the second weight comes into contact with the floor surface of the hoistway. This releases the tension acting on the governor rope, making it possible to adjust the length of the governor rope (see, for example, Patent Document 1).

JP 2004-238128 A

However, if elevator equipment is arranged around the governor weight, there is not enough space for the second weight to rotate. In this case, the second weight cannot be rotated, and the tension acting on the governor rope cannot be released.

This disclosure has been made to solve the problems described above, and its purpose is to provide an elevator governor that can more reliably release the tension acting on the governor rope.

The elevator governor of the present disclosure comprises a mounting section attached to a governor weight, a lifting section provided on the mounting section and moving in a height direction relative to the mounting section, and a safety fence provided on the mounting section and arranged to extend downward from the mounting section , the lifting section moves between a rope tension position in which the lifting section moves away from the floor surface of the hoistway and a tension release position in which the lifting section pushes the floor surface of the hoistway downward to lift the mounting section , and the safety fence surrounds the lifting section when viewed from above .

The elevator governor disclosed herein can more reliably release the tension acting on the governor rope.

1 is a configuration diagram showing an elevator equipped with an elevator governor according to a first embodiment. FIG. 2 is a front view showing a main part of the elevator governor of FIG. 1. FIG. 2 is a front view showing a main part of an elevator governor according to the first embodiment. FIG. 4 is a diagram showing a state in which the governor of FIG. 3 is in contact with the floor surface of the hoistway. FIG. 11 is a front view showing a main part of an elevator governor according to a second embodiment.

Embodiment 1.
Fig. 1 is a configuration diagram showing an elevator equipped with an elevator governor according to embodiment 1. The elevator includes a car 1 and a pair of car guide rails 2. Fig. 1 shows only one of the pair of car guide rails 2. When viewed from above, the pair of car guide rails 2 are arranged to sandwich the car 1 therebetween.

The car 1 and the car guide rail 2 are provided in the elevator shaft 3. The car guide rail 2 is arranged to extend in the height direction A. The car guide rail 2 guides the car 1. Therefore, the car 1 rises and falls in the elevator shaft 3 along the car guide rail 2. In other words, the car 1 rises and falls in the elevator shaft 3 in the height direction A.

The elevator also includes a counterweight 4 and a pair of counterweight guide rails (not shown). When viewed from above, the pair of counterweight guide rails are arranged to sandwich the counterweight 4.

The counterweight 4 and the counterweight guide rail are provided in the hoistway 3. The counterweight guide rail is arranged to extend in the height direction A. The counterweight guide rail guides the counterweight 4. Therefore, the counterweight 4 rises and falls along the counterweight guide rail. In other words, the counterweight 4 rises and falls in the hoistway 3 in the height direction A.

The elevator also includes a main rope 5 and a hoist 6. The main rope 5 is provided between the hoistway 3 and the machine room 7. The hoist 6 is provided in the machine room 7. The machine room 7 is located above the hoistway 3.

One longitudinal end of the main rope 5 is connected to the car 1. The other longitudinal end of the main rope 5 is connected to the counterweight 4. The car 1 and the counterweight 4 are supported by the main rope 5.

The middle part of the main rope 5 in the longitudinal direction is wound around the hoist 6 from above. The hoist 6 is driven to move the main rope 5. The driving of the hoist 6 is controlled by an elevator control panel (not shown). The main rope 5 moves the car 1 and counterweight 4 up and down the hoistway 3. Therefore, the hoist 6 is driven to move the car 1 and counterweight 4 up and down the hoistway 3.

The elevator also includes a governor 8. The governor 8 includes an upper pulley 801, a lower pulley 802, and a governor rope 803.

The upper pulley 801 is provided at the bottom of the machine room 7. The upper pulley 801 is supported on the floor surface of the machine room 7. The lower pulley 802 is disposed at the bottom of the elevator shaft 3. The upper pulley 801 and the lower pulley 802 are disposed apart from each other in the height direction A. Each of the upper pulley 801 and the lower pulley 802 is rotatable.

The governor rope 803 is formed in an endless shape. The governor rope 803 is provided across the hoistway 3 and the machine room 7. The governor rope 803 is wound around the upper pulley 801 and the lower pulley 802. Specifically, the governor rope 803 is wound around the upper pulley 801 from above, and around the lower pulley 802 from below.

Although not shown, a portion of the governor rope 803 is connected to the car 1. Therefore, as the car 1 ascends and descends in the elevator shaft 3, the governor rope 803 moves in a circular motion. As the governor rope 803 moves in a circular motion, the upper pulley 801 and the lower pulley 802 rotate. The upper pulley 801 monitors the speed of the governor rope 803, and stops the circular motion of the governor rope 803 when the speed of the governor rope 803 reaches a preset speed.

The governor 8 also includes a rotating arm 804 and a governor weight 805.

The rotating arm 804 is provided in the elevator 3. The rotating arm 804 is attached to the lower part of the car guide rail 2. The rotating arm 804 is arranged to extend from the car guide rail 2 in the width direction B of the car guide rail 2. When viewed from above, the width direction B of the car guide rail 2 is a direction perpendicular to the direction in which the pair of car guide rails 2 face each other.

The rotating arm 804 is supported rotatably relative to the car guide rail 2. The rotation axis of the rotating arm 804, which rotates relative to the car guide rail 2, is arranged along the direction in which the pair of car guide rails 2 face each other.

When the rotating arm 804 rotates relative to the car guide rail 2, the position of the longitudinal portion of the rotating arm 804 that is away from the car guide rail 2 in the height direction A changes.

The lower pulley 802 is supported on a longitudinal portion of the rotating arm 804, away from the car guide rail. Therefore, when the rotating arm 804 rotates, the lower pulley 802 moves in the height direction A.

When the lower pulley 802 moves in the height direction A, bending of the governor rope 803 is suppressed in the event that the governor rope 803 is stretched.

The governor weight 805 is attached to the lower pulley 802. By attaching the governor weight 805 to the lower pulley 802, a preset tension acts on the governor rope 803.

When an elevator is used for a long period of time, a preset amount of elongation occurs in the governor rope 803. When the preset amount of elongation occurs in the governor rope 803, work is performed to shorten the governor rope 803.

Figure 2 is a front view showing the main parts of the elevator governor 8 of Figure 1. The governor weight 805 has a weight support part 806 extending downward from the lower pulley 802, and a weight body 807 supported by the weight support part 806. The weight body 807 has a rectangular parallelepiped shape.

Figure 3 is a front view showing the main parts of the elevator governor 8 according to the first embodiment. The governor 8 includes an attachment part 808 attached to the weight body 807 and an elevation part 809 provided on the attachment part 808.

The mounting portion 808 has a mounting base 810 provided on the underside of the weight body 807 and a pair of mounting bands 811 that secure the mounting base 810 to the weight body 807.

The mounting base 810 has a mounting base base 812 that is placed on the weight body 807, and a protrusion 813 that protrudes from the side of the weight body 807 in a direction perpendicular to the side of the weight body 807 when viewed from above.

The mounting band 811 is wound around the mounting base 812 of the mounting base 810 and the weight body 807. The mounting base 810 is fixed to the weight body 807 by winding the mounting band 811 around the mounting base 812 and the weight body 807. The mounting band 811 is removed from the mounting base 812 and the weight body 807, and the fixation between the mounting base 810 and the weight body 807 is released. Therefore, the mounting part 808 is removably attached to the governor weight 805.

The protruding portion 813 has multiple screw holes 814 formed therein. The multiple screw holes 814 penetrate the protruding portion 813 in the height direction.

The lifting section 809 has a number of jack bolts 815. The jack bolts 815 are inserted one by one into the number of screw holes 814.

When the jack bolt 815 rotates in the threaded hole 814, the position of the jack bolt 815 in the height direction A relative to the protrusion 813 changes. In other words, when the jack bolt 815 rotates in the threaded hole 814, the lifting part 809 moves in the height direction A relative to the mounting part 808.

The jack bolt 815 is rotated by an electric tool (not shown). By using an electric tool, the jack bolt 815 can be easily rotated.

The position of the lifting unit 809 when it leaves the floor surface 301 of the hoistway 3 is the rope tension position. The position of the lifting unit 809 when it comes into contact with the floor surface 301 of the hoistway 3 and pushes the floor surface 301 of the hoistway 3 downward to lift the mounting unit 808 is the tension release position. As the lifting unit 809 moves in the height direction A relative to the mounting unit 808, the lifting unit 809 moves between the rope tension position and the tension release position.

Next, the procedure for shortening the governor rope 803 in the elevator governor 8 according to the first embodiment will be described. Figure 4 is a diagram showing the state in which the governor 8 in Figure 3 is in contact with the floor surface 301 of the hoistway 3. First, the worker attaches the mounting part 808 to the governor weight 805. At this time, the worker adjusts the position of the lifting part 809 in the height direction A relative to the mounting part 808 so that the lifting part 809 does not hit the floor surface 301 of the hoistway 3. In other words, the worker positions the lifting part 809 in the rope tension position.

Then, the worker rotates the jack bolt 815 in the threaded hole 814 to move the lifting part 809 downward relative to the mounting part 808, and brings the lifting part 809 into contact with the floor surface 301 of the elevator shaft 3.

With the lifting unit 809 in contact with the floor surface 301 of the hoistway 3, the worker further rotates the jack bolt 815 in the screw hole 814 to move the lifting unit 809 downward relative to the mounting unit 808. This causes the lifting unit 809 to push the floor surface 301 of the hoistway 3 downward, lifting the mounting unit 808. In other words, the lifting unit 809 moves from the rope tension position to the tension release position. As a result, the tension acting on the governor rope 803 is released, making it possible to adjust the length of the governor rope 803.

After the length of the governor rope 803 has been adjusted, the worker rotates the jack bolt 815 in the screw hole 814 to move the lifting section 809 upward relative to the mounting section 808, and moves the lifting section 809 away from the floor surface 301 of the hoistway 3. In other words, the worker moves the lifting section 809 from the relaxed position to the rope tensioned position. This causes a preset tension to act on the governor rope 803.

Then, the worker removes the attachment part 808 from the governor weight 805. This completes the shortening work of the governor rope 803 in the elevator governor 8.

As described above, the elevator governor 8 according to the first embodiment includes the mounting portion 808 attached to the governor weight 805, and the lifting portion 809 that is provided on the mounting portion 808 and moves in the height direction A relative to the mounting portion 808. The lifting portion 809 moves between a rope tension position where the lifting portion 809 is separated from the floor surface 301 of the hoistway 3, and a tension release position where the lifting portion 809 pushes the floor surface 301 of the hoistway 3 downward to lift the mounting portion 808. According to this configuration, the lifting portion 809 moves in the height direction A relative to the mounting portion 808. As a result, the space required for the operation of releasing the tension acting on the governor rope 803 around the governor weight 805 can be reduced, compared to a conventional elevator governor in which the second weight rotates relative to the first weight. As a result, the tension acting on the governor rope 803 can be released more reliably.

The mounting part 808 is also formed with a threaded hole 814 extending in the height direction A, and the lifting part 809 has a jack bolt 815 inserted into the threaded hole 814. With this configuration, the lifting part 809 can be moved in the height direction A relative to the mounting part 808 by rotating the jack bolt 815 in the threaded hole 814. As a result, with a simple configuration, the lifting part 809 can be moved between a rope tension position and a tension release position.

The mounting portion 808 is detachably attached to the governor weight 805. According to this configuration, the mounting portion 808 can be attached to the governor weight 805 only when the length of the governor rope 803 is to be adjusted. This allows the mounting portion 808 to be detached from the governor weight 805 when the length of the governor rope 803 is not adjusted. As a result, when the length of the governor rope 803 is not adjusted, the space around the governor rope 803 can be effectively used. In addition, the same mounting portion 808 can be attached to and detached from each of the multiple governor weights 805. This allows the lengths of the multiple governor ropes 803 to be adjusted using the same mounting portion 808 and the same lifting portion 809. In addition, the mounting portion 808 can be attached to an existing governor weight 805. This allows the length of the existing governor rope 803 to be adjusted using the mounting portion 808 and the lifting portion 809.

Embodiment 2.
5 is a front view showing a main part of an elevator governor according to embodiment 2. The elevator governor 8 according to embodiment 2 includes a safety fence 816 provided on a mounting portion 808.

The safety fence 816 is provided on the mounting base 810. When viewed from above, the safety fence 816 surrounds the periphery of the lifting section 809. The safety fence 816 is extendable in the height direction A. The safety fence 816 is arranged to extend downward from the mounting section 808. The safety fence 816 is arranged across the mounting section 808 and the floor surface 301 of the lifting shaft 3.

The safety fence 816 is composed of a framework that is expandable in the height direction A and a transparent sheet attached to the framework. The rest of the configuration of the elevator governor 8 in the second embodiment is the same as the configuration of the elevator governor 8 in the first embodiment.

As described above, the elevator governor 8 according to the second embodiment includes a safety fence 816 provided on the mounting portion 808. The safety fence 816 is arranged to extend downward from the mounting portion 808. The safety fence 816 also surrounds the lifting/lowering portion 809 when viewed from above. This configuration can prevent foreign objects from entering below the lifting/lowering portion 809 when the lifting/lowering portion 809 moves from the rope tension position to the tension release position. As a result, it can prevent foreign objects from being caught between the lifting/lowering portion 809 and the floor surface 301 of the hoistway 3.

1 Cage, 2 Cage guide rail, 3 Hoistway, 4 Counterweight, 5 Main rope, 6 Hoist, 7 Machine room, 8 Governor, 301 Floor, 801 Upper pulley, 802 Lower pulley, 803 Governor rope, 804 Rotating arm, 805 Governor weight, 806 Weight support part, 807 Weight body, 808 Mounting part, 809 Lifting part, 810 Mounting base, 811 Mounting band, 812 Mounting base base, 813 Protruding part, 814 Screw hole, 815 Jack bolt, 816 Safety fence.

Claims (3)

a mounting portion attached to the governor weight;
a lifting unit provided on the mounting portion and movable in a height direction relative to the mounting portion;
A safety fence is provided on the mounting portion and arranged to extend downward from the mounting portion;
Equipped with
The lifting section moves between a rope tensioned position where the lifting section is separated from the floor surface of the hoistway and a tension released position where the lifting section pushes the floor surface of the hoistway downward to lift the mounting section ,
The safety fence is an elevator governor that surrounds the lifting section when viewed from above . The mounting portion has a screw hole extending in a height direction.
2. The elevator governor according to claim 1, wherein the lifting section has a jack bolt inserted into the screw hole. 3. The elevator governor according to claim 1 , wherein the mounting portion is detachably attached to the governor weight.