JP6973685B1 - Elevator rope restraints - Google Patents

Abstract

It provides a restraint that can suppress self-propelling in the work of replacing the rope of the elevator wrapped around the sheave. The restraint (21) includes a holder (22) and a bolt (23). The retainer (22) is separable into an anterior retainer (24a) and a posterior retainer (24b). The holder (22) is provided with left and right holding holes (27). One of the left and right holding holes (27) sandwiches a portion of the governor rope (15) that hangs from one side of the governor sheave (14) between the front holding body (24a) and the rear holding body (24b). This is the part to be held by. The left and right other holding holes (27) sandwich the portion of the governor rope (15) that hangs from the other side of the governor sheave (14) between the front holding body (24a) and the rear holding body (24b). This is the part to be held by. The bolt (23) fastens the front holding body (24a) and the rear holding body (24b) between the left and right holding holes (27).

Description

The present disclosure relates to elevator rope restraints.

Patent Document 1 discloses an example of a replacement tool for a speed governor rope of an elevator. The replacement tool is fastened to the car while holding one end of the governor rope.

Japanese Patent Application Laid-Open No. 7-10417

However, the replacement tool of Patent Document 1 holds only one side of the governor rope. For this reason, when the rope of an elevator such as a governor rope is replaced, if the load is unbalanced on both sides of the sheave around which the rope is wound, the other side of the rope may run by itself. There is.

The present disclosure relates to the solution of such a problem. The present disclosure provides a restraint that suppresses self-propelling in the work of replacing the rope of an elevator wrapped around a sheave.

The rope restraint of the elevator according to the present disclosure can be separated into a pair of holding bodies, and a portion of the rope of the elevator wound around the sheave that hangs down from one side of the sheave is sandwiched between the pair of holding bodies. A holder provided with a first holding portion for holding and a second holding portion for sandwiching and holding a portion of the rope hanging from the other side of the sheave between the pair of holding bodies, and the pair of holding bodies. The rope is provided with a fastener to be fastened between the first holding portion and the second holding portion, and each of the first holding portion and the second holding portion is provided on each of the pair of holding bodies. Each of the pair of holding bodies has a left-right edge of a surface facing each other at both ends in the left-right direction, with the direction connecting the first holding portion and the second holding portion as the left-right direction. Has a flat surface at right angles to .

According to the restraint according to the present disclosure, self-propelling in the work of exchanging the rope of the elevator wound around the sheave is suppressed.

It is a block diagram of the elevator which concerns on Embodiment 1. FIG. It is a top view of the restraint which concerns on Embodiment 1. FIG. It is a side view of the restraint which concerns on Embodiment 1. FIG. It is a figure which shows the example of the exchange work of the governor rope using the restraint which concerns on Embodiment 1. FIG. It is a figure which shows the example of the exchange work of the governor rope using the restraint which concerns on Embodiment 1. FIG. It is a figure which shows the example of the exchange work of the governor rope using the restraint which concerns on Embodiment 1. FIG. It is a figure which shows the example of the exchange work of the governor rope using the restraint which concerns on Embodiment 1. FIG. It is a figure which shows the example of the exchange work of the governor rope using the restraint which concerns on Embodiment 1. FIG.

The embodiment for carrying out the present disclosure will be described with reference to the accompanying drawings. In each figure, the same or corresponding parts are designated by the same reference numerals, and duplicate description will be appropriately simplified or omitted.

Embodiment 1.
FIG. 1 is a configuration diagram of an elevator 1 according to the first embodiment.

The elevator 1 is applied to, for example, a building having a plurality of floors. In the building, the hoistway 2 of the elevator 1 is provided. The hoistway 2 is a vertically long space over a plurality of floors. In this example, the machine room 3 is provided above the hoistway 2. A pit 4 is provided at the bottom of the hoistway 2. A pair of guide rails 5 are provided in the hoistway 2. Each guide rail 5 is arranged parallel to each other along the vertical direction. In FIG. 1, one guide rail 5 is shown. The elevator 1 includes a hoisting machine 6, a main rope 7, a car 8, a counterweight 9 and a speed governor 10.

The hoisting machine 6 is arranged in, for example, the machine room 3. The hoisting machine 6 may be arranged at the upper part of the hoistway 2 or the like. The hoisting machine 6 includes a motor 11 and a drive sheave 12. The motor 11 is a device that generates a driving force. The drive sheave 12 is a sheave that is rotated by a driving force generated by the motor 11.

The main rope 7 is wound around the drive sheave 12. The main rope 7 supports the load of the car 8 on one side of the drive sheave 12. The main rope 7 supports the load of the counterweight 9 on the other side of the drive sheave 12. The roping method in which the load of the car 8 and the counterweight 9 is supported by the main rope 7 is not limited to the roping method shown in FIG.

The car 8 is a device that transports the user of the elevator 1 between a plurality of floors by traveling in the hoistway 2 in the vertical direction. The car 8 is arranged between the pair of guide rails 5. The car 8 travels in the vertical direction while being guided by the guide rail 5 by the driving force generated by the motor 11 of the hoisting machine 6. The basket 8 includes an emergency stop 13. The emergency stop 13 is a device for forcibly stopping the running of the car 8. The emergency stop 13 stops the running of the car 8 by, for example, sandwiching the guide rail 5.

The counterweight 9 is a device that balances the load applied to both sides of the drive sheave 12 with the car 8. The counterweight 9 travels in the hoistway 2 in the opposite direction of the car 8 by the driving force generated by the motor 11 of the hoisting machine 6.

The governor 10 includes a governor sheave 14, a governor rope 15, a tension wheel 16, a mounting portion 17, a connecting arm 18, and a gripping device 19. The governor sheave 14 is arranged in, for example, a machine room 3. The governor sheave 14 is arranged, for example, in a hoistway 2. The governor rope 15 is an annular rope wound around the governor sheave 14 and the tension wheel 16. The tension wheel 16 is arranged, for example, in the pit 4. The tension wheel 16 is a sheave that applies tension to the governor rope 15 by, for example, the weight of a weight 20 attached to the tension wheel 16. The mounting portion 17 is a portion for mounting the speed governor rope 15 to the car 8. The mounting portion 17 may make the governor rope 15 annular by holding both ends of the governor rope 15, for example. The connecting arm 18 is a device for connecting the speed governor rope 15 and the emergency stop 13 of the car 8. The speed governor rope 15 moves in conjunction with the running of the car 8 by the mounting portion 17. At this time, the governor sheave 14 rotates in conjunction with the movement of the governor rope 15. The gripping device 19 is a device that grips the governor rope 15 when the rotation speed of the governor sheave 14 exceeds a reference speed. When the gripping device 19 grips the governor rope 15, the movement of the governor rope 15 is stopped. At this time, the emergency stop 13 is operated through the connecting arm 18, so that the car 8 stops running.

Here, the rope of the elevator 1 such as the governor rope 15 or the main rope 7 is replaced with a new rope, for example, when it is damaged or when the service life is exceeded. In the rope replacement work, both ends of the rope may hang down from both sides of the sheave such as the governor sheave 14 or the drive sheave 12. At this time, when the rope is not restrained on both sides of the sheave, if the load is unbalanced on both sides of the sheave, the sheave may rotate to the side where the load is large. If the load imbalance increases due to the rotation of the sheave, the rope may run on its own. Therefore, the worker who replaces the rope uses a restraint 21 (not shown in FIG. 1) to restrain the rope on both sides of the sheave. Here, the rope constraint refers to a rope constraint that constrains the relative positional relationship between both sides of the rope.

FIG. 2 is a top view of the restraint 21 according to the first embodiment.

The restraint 21 includes a holder 22 and a bolt 23.

The holder 22 is a device for holding the rope of the elevator 1. The holder 22 in this example is a device for holding the governor rope 15. In this example, the holder 22 has a rectangular parallelepiped shape. In this example, the holder 22 has a symmetrical shape. In this example, the holder 22 has a vertically symmetrical shape. The width of the holder 22 in the left-right direction is, for example, about 60 mm. The holder 22 is composed of two separable parts, a front holder 24a and a rear holder 24b. The front holding body 24a and the rear holding body 24b are examples of a pair of holding bodies. In the retainer 22 of this example, the anterior retainer 24a and the posterior retainer 24b are not coupled to each other. In particular, in the holder 22 of this example, the left and right ends of the front holding body 24a and the rear holding body 24b are not connected by, for example, a hinge.

The bolt 23 is an instrument for fastening the front holding body 24a and the rear holding body 24b. The bolt 23 is an example of a fastener. The bolt 23 has a head portion 23a and a shaft portion 23b. In the bolt 23, a male thread is cut on the shaft portion 23b. The head 23a of the bolt 23 of this example is provided with a cross-shaped groove (not shown in FIG. 2). The bolt 23 is tightened by, for example, a screwdriver that meshes with a cross-shaped groove.

The front holder 24a is a portion forming the front side of the holder 22. In the front holding body 24a, a central hole 25a penetrating the central portion in the front-rear direction is provided. The inner diameter of the central hole 25a is larger than the outer diameter of the shaft portion 23b of the bolt 23. The diameter of the central hole 25a is smaller than the outer diameter of the head 23a of the bolt 23. In the front holding body 24a, a pair of holding grooves 26a are provided on the rear surface. Each holding groove 26a is a semicircular groove extending from the upper surface to the lower surface along the vertical direction. The width of each holding groove 26a is a width that matches the diameter of the governor rope 15. The depth of each holding groove 26a is a depth that matches the radius of the governor rope 15. The width and depth of each holding groove 26a may differ from the diameter or radius of the governor rope 15 in a range such as a tightening allowance. One holding groove 26a is provided on the left side of the central hole 25a. The other holding groove 26a is provided on the right side of the central hole 25a. In the front holding body 24a of this example, no groove is provided other than the pair of holding grooves 26a.

The rear holder 24b is a portion forming the rear side of the holder 22. In the rear holding body 24b, a central hole 25b that penetrates the central portion in the front-rear direction is provided. In the center hole 25b, a female screw that meshes with the male screw cut on the shaft portion 23b of the bolt 23 is cut. In the front holding body 24a, a pair of holding grooves 26b are provided on the rear surface. Each holding groove 26b is a semicircular groove extending from the upper surface to the lower surface along the vertical direction. The width of each holding groove 26b is a width that matches the diameter of the governor rope 15. The depth of each holding groove 26b is a depth that matches the radius of the governor rope 15. The width and depth of each holding groove 26b may differ from the diameter or radius of the governor rope 15 in a range such as a tightening allowance. One holding groove 26b is provided on the left side of the central hole 25b. The other holding groove 26b is provided on the right side of the central hole 25b. In the rear holding body 24b of this example, no groove is provided other than the pair of holding grooves 26b.

When aligning the central axes of the central hole 25a and the central hole 25b, the rear surface of the front holding body 24a faces the front surface of the rear holding body 24b. At this time, the holding groove 26a on the left side of the front holding body 24a faces the holding groove 26b on the left side of the rear holding body 24b. Further, the holding groove 26a on the right side of the front holding body 24a faces the holding groove 26b on the right side of the rear holding body 24b. When the rear surface of the front holding body 24a and the front surface of the rear holding body 24b are aligned, the holding grooves 26a and the holding grooves 26b facing each other form a holding hole 27. The holding hole 27 is a columnar hole extending from the upper surface to the lower surface of the holder 22 along the vertical direction. The diameter of the holding hole 27 corresponds to the diameter of the governor rope 15. The holding holes 27 formed by the left and right holding grooves 26a and the holding grooves 26b are examples of the first holding portion. The holding holes 27 formed by the other left and right holding grooves 26a and the holding grooves 26b are examples of the second holding portion. The shape of each of the left and right holding holes 27 may be different from the diameter circle of the thickness of the governor rope 15 in the range of, for example, the tightening allowance.

FIG. 3 is a side view of the restraint 21 according to the first embodiment.

The restraint 21 is assembled so that the shaft portion 23b of the bolt 23 penetrates the center hole 25a of the front holding body 24a and the center hole 25b of the rear holding body 24b from the front to the rear. The shaft portion 23b of the bolt 23 projects rearward from the rear surface of the rear holding body 24b. At this time, the male screw cut on the shaft portion 23b of the bolt 23 meshes with the female screw of the center hole 25b. The bolt 23 fastens the front holding body 24a and the rear holding body 24b by being tightened by, for example, a screwdriver.

A caulking portion 28 is provided at the rear end portion of the shaft portion 23b of the bolt 23. The caulked portion 28 is a portion that has been caulked after being assembled so that the shaft portion 23b of the bolt 23 penetrates the center hole 25a and the center hole 25b. The caulking portion 28 prevents the shaft portion 23b of the bolt 23 from coming off from the center hole 25b even when the fastening by the bolt 23 is loosened. As a result, even when the fastening by the bolt 23 is loosened, the rear holding body 24b is prevented from falling off from the restraint 21. Further, since the rear holding body 24b is prevented from falling off, the front holding body 24a is prevented from falling off from the restraint 21. In this way, the separation of the bolt 23 from the front holding body 24a and the rear holding body 24b is prevented by the caulking portion 28. The caulking portion 28 is an example of a separation prevention portion.

Subsequently, an example of the replacement work of the speed governor rope 15 using the restraint 21 will be described with reference to FIGS. 4 to 8.
4 to 8 are views showing an example of replacement work of the governor rope 15 using the restraint 21 according to the first embodiment.

FIG. 4 shows a schematic view of the entire elevator 1.
In this example, an example of replacement work for replacing the existing governor rope 15p with a new governor rope 15q (not shown in FIG. 4) is shown. Here, the diameter of the newly installed governor rope 15q is the same as the diameter of the existing speed governor rope 15p. In the present disclosure, when the existing speed governor rope 15p and the new speed governor rope 15q are not particularly distinguished, they may be simply referred to as the speed governor rope 15.

The worker performing the replacement work removes the existing speed governor rope 15p from the mounting portion 17 and the connecting arm 18. After that, the worker relaxes the tension applied to the existing speed governor rope 15p by the tension wheel 16 by, for example, removing the weight 20 attached to the tension wheel 16 or depositing the weight of the weight 20 in another device. .. After that, the worker moves both ends of the existing speed governor rope 15p in a state of being connected in a ring shape to a work place such as a pit 4 or a landing on the lowest floor. After that, the worker uses the restraint 21 to hold the portion of the existing governor rope 15p hanging from one side of the governor sheave 14 and the portion of the existing governor rope 15p hanging from the other side of the governor sheave 14. Restrained as shown in FIG.

FIG. 5 shows a perspective view of the restraint 21 when restraining the existing speed governor rope 15p.

The worker holds the restraint 21 in a state where the fastening by the bolt 23 is loosened with his left hand. At this time, since the fastening by the bolt 23 is loosened, a gap 29 is formed between the front holding body 24a and the rear holding body 24b. At the left end of the holder 22, there is a gap 29 leading to the left holding groove 26a and the left holding groove 26b. At the right end of the holder 22, there is a gap 29 leading to the right holding groove 26a and the right holding groove 26b.

After that, the worker grabs the existing speed governor rope 15p with his right hand, which does not have the restraint 21. The worker passes the portion of the existing governor rope 15p hanging from one side of the governor sheave 14 through the gap 29 formed at the left end of the holder 22 to hold the left holding groove 26a and the left side. Hang on the groove 26b. The worker passes the portion of the existing governor rope 15p hanging from the other side of the governor sheave 14 through the gap 29 formed at the right end of the holder 22 to hold the right holding groove 26a and the right side. Hang on the groove 26b. As a result, when the rear surface of the front holding body 24a and the front surface of the rear holding body 24b are aligned, the existing speed governor rope 15p is in a state of being inserted into each of the left and right holding holes 27.

After that, the worker tightens the bolt 23 by turning the screw held in his right hand. At this time, since the diameter of the holding hole 27 corresponds to the diameter of the speed governor rope 15, the existing speed governor rope 15p is used in the front holding body 24a and the rear holding body 24b in each of the left and right holding holes 27. It is sandwiched between them and held.

FIG. 6 shows a schematic view of the entire elevator 1.

After restraining the existing speed governor rope 15p with the restraint 21, the worker disengages both ends of the existing speed governor rope 15p coupled in an annular shape. The worker winds one end of the existing speed governor rope 15p that has been disconnected around a drum or the like for collecting the existing speed governor rope 15p. The worker connects the other end of the existing speed governor rope 15p that has been disconnected to one end of the new speed governor rope 15q as shown in FIG.

FIG. 7 shows a schematic view of the entire elevator 1.

The worker winds one end of the existing governor rope 15p around a drum or the like, connects the multi-end to the new governor rope 15q, and then removes the restraint 21 from the existing governor rope 15p. The worker removes the restraint 21 from the existing speed governor rope 15p by, for example, the reverse procedure when restraining the existing speed governor rope 15p with the restraint 21. That is, the worker removes the restraint 21 as follows, for example. The worker holds the restraint 21 with his left hand, for example. The worker loosens the fastening with the bolt 23 with his right hand, which does not have the restraint 21, for example, by turning a screw. The worker removes the portion of the existing governor rope 15p hanging on the left holding groove 26a and the left holding groove 26b through the gap 29 formed at the left end of the holder 22. The worker removes the portion of the existing governor rope 15p hanging on the right holding groove 26a and the right holding groove 26b through the gap 29 formed at the right end of the holder 22.

After that, the worker recovers the existing governor rope 15p by, for example, winding a drum around which one end of the existing governor rope 15p is wound. At this time, the new speed governor rope 15q is drawn to the other end of the existing speed governor rope 15p and is arranged so as to replace the existing speed governor rope 15p. As a result, the newly installed governor rope 15q is wound around the governor sheave 14 as shown in FIG. 7.

FIG. 8 shows a schematic view of the entire elevator 1.

Workers use the existing governor rope 15q to hang from one side of the governor sheave 14 and the new governor rope 15q to hang from the other side of the governor sheave 14. It is restrained by the restraint 21 by the same procedure as the restraint of the rope 15p. That is, the worker restrains the governor rope 15q as follows, for example. The worker holds the restraint 21 with his left hand, for example. The worker grabs the newly installed governor rope 15q with his right hand, which does not have the restraint 21. The worker passes the portion of the newly installed governor rope 15q hanging from one side of the governor sheave 14 through the gap 29 formed at the left end of the holder 22 to hold the left holding groove 26a and the left side. Hang on the groove 26b. The worker passes the portion of the newly installed governor rope 15q hanging from the other side of the governor sheave 14 through the gap 29 formed at the right end of the holder 22 to hold the right holding groove 26a and the right side. Hang on the groove 26b. After that, the worker tightens the bolt 23 by turning the screw held in his right hand. As a result, in each of the left and right holding holes 27, the newly installed governor rope 15q is sandwiched and held between the front holding body 24a and the rear holding body 24b.

After restraining the new governor rope 15q with the restraint 21, the worker disengages the connection between the new governor rope 15q and the existing governor rope 15p. Workers connect both ends of the newly installed governor rope 15q in an annular shape. After that, the worker moves both ends of the newly installed speed governor rope 15q in a state of being coupled in an annular shape to the position of the car 8. After that, the worker applies tension to the newly installed speed governor rope 15q by the weight of the weight 20 of the tension wheel 16. After that, the worker attaches the attachment portion 17 and the connecting arm 18 to the newly installed speed governor rope 15q.

As described above, the restraint 21 according to the first embodiment includes a holder 22 and a bolt 23. The holder 22 is separable into a front holder 24a and a rear holder 24b. The holder 22 is provided with left and right holding holes 27. One of the left and right holding holes 27 is a portion of the governor rope 15 that hangs down from one side of the governor sheave 14 by sandwiching it between the front holding body 24a and the rear holding body 24b. The left and right other holding holes 27 are portions of the governor rope 15 that sandwich and hold a portion of the governor sheave 14 that hangs down from the other side between the front holding body 24a and the rear holding body 24b. The bolt 23 fastens the front holding body 24a and the rear holding body 24b between the left and right holding holes 27.

With such a configuration, the restraint 21 restrains the portions of the governor ropes 15 hanging from both sides of the governor sheave 14 to each other. Therefore, even if the governor sheave 14 rotates, the load imbalance is less likely to increase, so that the instability of the governor rope 15 hung on the governor sheave 14 is suppressed. As a result, self-propelling in the rope replacement work of the elevator 1 such as the governor rope 15 is suppressed. Further, by loosening the fastening by the fastening portion, a gap 29 leading to the left and right holding holes 27 is formed at the left and right ends of the holder 22. Therefore, the worker can easily insert the governor rope 15 from the left and right ends of the holder 22 to the left and right holding holes 27. This enhances the efficiency of the replacement work of the governor rope 15. Further, since the fastener fastens the front holding body 24a and the rear holding body 24b between the left and right holding holes 27, the holder 22 still has the speed governor rope even if one side of the speed governor rope 15 has a reduced diameter. Both sides of 15 can be held with equal force. As a result, the restraint 21 can stably restrain the governor rope 15 even when the diameter of the governor rope 15 is partially reduced.

Further, the left and right holding holes 27 are formed by a holding groove 26a along the governor rope 15 provided in the front holding body 24a and a holding groove 26b along the speed governor rope 15 provided in the rear holding body 24b. It is formed.

With such a configuration, the holder 22 can more reliably hold the governor rope 15.

Further, the bolt 23 has a caulking portion 28 that prevents separation from each of the front holding body 24a and the rear holding body 24b.

With such a configuration, the fastener such as the bolt 23 and the holder 22 can be prevented from falling off. Therefore, it becomes easier to replace the rope such as the governor rope 15.

Further, the holder 22 of this example does not have a groove other than the holding groove 26a or the holding groove 26b. That is, the restraint 21 is a dedicated device for the governor rope 15 having a predetermined diameter. Since the holding holes 27 corresponding to the governor ropes 15 having a plurality of diameters are not provided, it is possible to prevent the operator from accidentally inserting the governor rope 15 into the holding holes 27 having a size not corresponding to the diameter. .. The holder 22 may be marked with information such as the diameter of the corresponding governor rope 15.

The first holding portion and the second holding portion do not have to be the holding holes 27 formed by the left and right holding grooves 26a and the holding grooves 26b. The first holding portion and the second holding portion are, for example, linear protrusions provided on the rear surface of the front holding body 24a and the front surface of the rear holding body 24b to suppress the lateral displacement of the speed governor rope 15. May be good. Alternatively, the first holding portion and the second holding portion may be, for example, an elastic body attached to the rear surface of the front holding body 24a and the front surface of the rear holding body 24b.

Further, the separation prevention portion does not have to be the caulking portion 28 at the rear end portion of the shaft portion 23b of the bolt 23. The separation prevention portion may be a disconnection prevention portion larger than the inner shape of the central hole 25b provided at the rear end portion of the shaft portion 23b of the bolt 23.

Further, the fastener does not have to be a bolt 23 that meshes with the center hole 25b. Fasteners may be bolts and nuts. The fastener may be fastened with, for example, a belt, a ratchet, or a buckle. It is preferable that the fastener has a structure in which the fastener can be fastened and released by the other hand of the worker so that the worker can perform the fastening work while holding the restraint 21 with one hand. ..

Further, the restraint 21 can also be applied to the rope replacement work of the other elevator 1 of the governor rope 15. The restraint 21 may be applied, for example, to the replacement work of the main rope 7 wound around the drive sheave 12.

The restraint according to the present disclosure can be applied to the replacement work of the rope of an elevator such as a governor rope.

1 elevator, 2 hoistway, 3 machine room, 4 pits, 5 guide rails, 6 hoisting machine, 7 main rope, 8 baskets, 9 balance weights, 10 governors, 11 motors, 12 drive sheaves, 13 emergency stops, 14 Governor Sheave, 15 Governor Rope, 16 Tension Wheel, 17 Mounting Part, 18 Connecting Arm, 19 Gripping Device, 20 Weight, 21 Restraint, 22 Holder, 23 Bolt, 23a Head, 23b Shaft, 24a front holding body, 24b rear holding body, 25a, 25b center hole, 26a, 26b holding groove, 27 holding hole, 28 caulking part, 29 gap

Claims (2)

A first holding portion that is separable into a pair of holding bodies and holds a portion of an elevator rope wound around the sheave that hangs from one side of the sheave by sandwiching it between the pair of holding bodies, and the rope. A holder provided with a second holding portion for sandwiching and holding a portion hanging from the other side of the sheave between the pair of holding bodies, and a holder.
A fastener for fastening the pair of holding bodies between the first holding portion and the second holding portion,
Equipped with
Each of the first holding portion and the second holding portion is a holding groove along the rope provided in each of the pair of holding bodies.
With the direction connecting the first holding portion and the second holding portion as the left-right direction, each of the pair of holding bodies is a flat surface that is perpendicular to the left-right edges of the surfaces facing each other at both ends in the left-right direction. restraint of the elevator rope with. The rope restraint for an elevator according to claim 1, wherein the fastener has a separation prevention portion that prevents separation from each of the pair of holders.

Images