Elevator governor

Abstract

To obtain an elevator speed governor capable of releasing tension acting on a rope of the governor more reliably.SOLUTION: An elevator speed governor 8 includes a mounting portion 808 attached to a speed governor weight 805, and an elevating portion 809 provided on the mounting portion 808 and moving in a height direction A with respect to the mounting portion 808. The elevating portion 809 moves between a rope tensioning position where the elevating portion 809 leaves a floor 301 of a hoistway 3, and a tensioning relaxation position where the elevating portion 809 pushes the floor 301 of the hoistway 3 downward to lift the mounting portion 808.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to an elevator governor. [Background technology]

[0002] Conventionally, there is known an elevator governor that includes an upper pulley, a lower pulley, a governor rope, and a governor weight. The upper pulley and the lower pulley are arranged apart 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 provided on the lower pulley. By providing the governor weight on the lower pulley, a preset tension acts on the governor rope.

[0003] 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 where the second weight is adjacent to the first weight in the lateral direction and an extended position where the second weight is adjacent to the first weight below.

[0004] When a preset tension is to be applied to the governor rope, the worker sets the position of the second weight to the folded position. When the length of the governor rope is to be adjusted, the worker sets the position of the second weight to the extended position. When the position of 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). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2004-238128 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, when elevator equipment is arranged around the governor weight, it is not possible to secure sufficient space for the second weight to rotate. In this case, there is a problem that the second weight cannot be rotated and the tension acting on the governor rope cannot be released.

[0007] The present disclosure has been made to solve the above-mentioned problems, and has an object to provide an elevator governor that can more reliably release tension acting on a governor rope. [Means for solving the problem]

[0008] The elevator governor according to the present disclosure includes a mounting part attached to a governor weight, a lifting part provided on the mounting part and movable in a height direction relative to the mounting part, A safety fence is provided on the mounting portion and arranged to extend downward from the mounting portion; The lifting section is movable between a rope tension position where the lifting section is separated from the floor surface of the hoistway and a tension release position where the lifting section pushes the floor surface of the hoistway downward to lift the mounting section. The safety fence surrounds the lift section when viewed from above. do. Effect of the Invention

[0009] According to the elevator governor according to the present disclosure, the tension acting on the governor rope can be more reliably released. [Brief description of the drawings]

[0010] [Figure 1] 1 is a configuration diagram showing an elevator equipped with an elevator governor according to a first embodiment. FIG. [Diagram 2] FIG. 2 is a front view showing a main part of the elevator governor of FIG. 1. [Diagram 3] FIG. 2 is a front view showing a main part of the elevator governor according to the first embodiment. [Figure 4] 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. [Diagram 5] FIG. 11 is a front view showing a main part of an elevator governor according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Embodiment 1 Fig. 1 is a configuration diagram showing an elevator equipped with an elevator governor according to a first embodiment. 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.

[0012] The car 1 and the car guide rails 2 are provided in a hoistway 3. The car guide rails 2 are arranged to extend in a height direction A. The car guide rails 2 guide the car 1. Therefore, the car 1 rises and falls in the hoistway 3 along the car guide rails 2. In other words, the car 1 rises and falls in the hoistway 3 in the height direction A.

[0013] 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.

[0014] 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.

[0015] The elevator also includes a main rope 5 and a hoisting machine 6. The main rope 5 is provided across the hoistway 3 and a machine room 7. The hoisting machine 6 is provided in the machine room 7. The machine room 7 is disposed above the hoistway 3.

[0016] One end in the longitudinal direction of the main ropes 5 is connected to the car 1. The other end in the longitudinal direction of the main ropes 5 is connected to the counterweight 4. The car 1 and the counterweight 4 are supported by the main ropes 5.

[0017] The middle portion of the main rope 5 in the longitudinal direction is wound around the hoist 6 from above. The main rope 5 moves as the hoist 6 is driven. The driving of the hoist 6 is controlled by an elevator control panel (not shown). The main rope 5 moves, causing the car 1 and counterweight 4 to rise and fall in the hoistway 3. Therefore, the hoist 6 drives, causing the car 1 and counterweight 4 to rise and fall in the hoistway 3.

[0018] The elevator also includes a speed governor 8. The speed governor 8 includes an upper pulley 801, a lower pulley 802, and a speed governor rope 803.

[0019] 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.

[0020] 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 an upper pulley 801 and a 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.

[0021] Although not shown, a portion of the governor rope 803 is connected to the car 1. Therefore, the governor rope 803 moves in a circulating manner as the car 1 moves up and down the hoistway 3. The circulating movement of the governor rope 803 rotates the upper pulley 801 and the lower pulley 802. The upper pulley 801 monitors the speed of the governor rope 803, and stops the circulating movement of the governor rope 803 when the speed of the governor rope 803 reaches a preset speed.

[0022] The speed governor 8 also includes a rotating arm 804 and a speed governor weight 805.

[0023] The rotating arm 804 is provided in the elevator shaft 3. The rotating arm 804 is attached to a lower portion of the car guide rail 2. The rotating arm 804 is disposed so as to extend from the car guide rail 2 in a 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.

[0024] The rotating arm 804 is supported rotatably relative to the car guide rail 2. The rotation axis of the rotating arm 804 that rotates relative to the car guide rail 2 is disposed along the direction in which the pair of car guide rails 2 face each other.

[0025] When the rotating arm 804 rotates relative to the car guide rail 2, the position in the height direction A of the longitudinal portion of the rotating arm 804 that is distant from the car guide rail 2 changes.

[0026] The lower pulley 802 is supported on a portion of the rotating arm 804 in the longitudinal direction, away from the car guide rail. Therefore, the lower pulley 802 moves in the height direction A as the rotating arm 804 rotates.

[0027] When the lower pulley 802 moves in the height direction A, the occurrence of bending in the governor rope 803 is suppressed in the case where the governor rope 803 is stretched.

[0028] The governor weight 805 is provided on the lower pulley 802. By providing the governor weight 805 on the lower pulley 802, a preset tension acts on the governor rope 803.

[0029] 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.

[0030] Fig. 2 is a front view showing a main part of the elevator governor 8 in Fig. 1. The governor weight 805 has a weight support part 806 extending downward from the lower pulley 802, and a weight main body 807 supported by the weight support part 806. The shape of the weight main body 807 is a rectangular parallelepiped.

[0031] 3 is a front view showing a main part of elevator governor 8 according to embodiment 1. Governor 8 includes mounting part 808 attached to weight main body 807 and lifting part 809 provided on mounting part 808.

[0032] The mounting portion 808 has a mounting base 810 provided on the lower surface of the weight body 807 , and a pair of mounting bands 811 that fix the mounting base 810 to the weight body 807 .

[0033] The mounting base 810 has a mounting base base 812 that is placed on top of 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.

[0034] The mounting band 811 is wound around the mounting base base 812 of the mounting base 810 and the weight body 807. By winding the mounting band 811 around the mounting base base 812 and the weight body 807, the mounting base 810 is fixed to the weight body 807. By removing the mounting band 811 from the mounting base base 812 and the weight body 807, the fixation between the mounting base 810 and the weight body 807 is released. Therefore, the mounting part 808 is detachably attached to the governor weight 805.

[0035] A plurality of screw holes 814 are formed in the protruding portion 813. The plurality of screw holes 814 penetrate the protruding portion 813 in the height direction.

[0036] The lifting section 809 has a plurality of jack bolts 815. The plurality of jack bolts 815 are inserted into the plurality of screw holes 814 one by one.

[0037] 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.

[0038] The jack bolt 815 is rotated by an electric tool (not shown). By using the electric tool, the jack bolt 815 can be easily rotated.

[0039] The position of the lifting / lowering part 809 when it leaves the floor surface 301 of the hoistway 3 is defined as the rope tension position. The position of the lifting / lowering part 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 part 808 is defined as the tension release position. As the lifting / lowering part 809 moves in the height direction A relative to the mounting part 808, the lifting / lowering part 809 moves between the rope tension position and the tension release position.

[0040] Next, a procedure for performing work to shorten the governor rope 803 in the elevator governor 8 according to the first embodiment will be described. Fig. 4 is a diagram showing a state in which the governor 8 in Fig. 3 is in contact with the floor surface 301 of the hoistway 3. First, a worker attaches the mounting part 808 to the governor weight 805. At this time, the worker adjusts the position of the lifting / lowering part 809 in the height direction A relative to the mounting part 808 so that the lifting / lowering part 809 does not hit the floor surface 301 of the hoistway 3. In other words, the worker positions the lifting / lowering part 809 at a rope tension position.

[0041] Thereafter, the worker rotates the jack bolt 815 in the screw 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 hoistway 3 .

[0042] 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 and lift 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.

[0043] 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 part 809 upward relative to the mounting part 808, and separates the lifting part 809 from the floor surface 301 of the hoistway 3. In other words, the worker moves the lifting part 809 from the tension-relaxed position to the rope-tightened position. This causes a preset tension to act on the governor rope 803.

[0044] Thereafter, the worker removes the mounting portion 808 from the governor weight 805. This completes the work of cutting the governor rope 803 in the elevator governor 8.

[0045] 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 provided on the mounting portion 808 and moving 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 made smaller than in 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.

[0046] Further, the mounting part 808 is 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 the rope tension position and the tension release position.

[0047] Moreover, the attachment portion 808 is provided detachably on the governor weight 805. According to this configuration, the attachment portion 808 can be attached to the governor weight 805 only when the length of the governor rope 803 is adjusted. This allows the attachment 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. Furthermore, the same attachment 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 attachment portion 808 and the same lifting and lowering portion 809. Furthermore, the attachment 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 attachment portion 808 and the lifting and lowering portion 809.

[0048] 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 an attachment portion 808.

[0049] 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 disposed so as to extend downward from the mounting section 808. The safety fence 816 is disposed across the mounting section 808 and the floor surface 301 of the lifting shaft 3.

[0050] Safety fence 816 is composed of a framework that is extendable and contractable in height direction A, and a transparent sheet attached to the framework. Other configurations of elevator governor 8 according to embodiment 2 are similar to those of elevator governor 8 according to embodiment 1.

[0051] As described above, the elevator governor 8 according to the second embodiment includes the safety fence 816 provided on the mounting portion 808. The safety fence 816 is disposed so as to extend downward from the mounting portion 808. Moreover, the safety fence 816 surrounds the periphery of 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. [Explanation of symbols]

[0052] 1 car, 2 car guide rail, 3 hoistway, 4 counterweight, 5 main rope, 6 hoist, 7 machine room, 8 governor, 301 floor surface, 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 protrusion, 814 screw hole, 815 jack bolt, 816 safety fence.

Claims

1. 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.

2. 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. 3. The elevator governor according to claim 1, wherein the mounting portion is detachably attached to the governor weight.

Images