JPWO2004024610A1 - Elevator car fixing device - Google Patents

Abstract

A rope 6 wound around a return wheel 8 disposed at the upper part of the elevator hoistway 1 and disposed in the hoistway 1, a car 2 suspended at one end of the rope 6, and other ropes 6 It is suspended by the rope 6 between the counterweight-side rope fixing member 11 and the return wheel 8 at the upper part of the hoistway 1 with the end fixed, and when the car 2 is lowered, the car 2 is lowered and the car 2 is lowered. An elevator having a counterweight 3 provided with a drive device 7 for moving up and down, an advancing / retreating member 13 provided in one of the car 2 and the counterweight 3 and moving forward and backward toward the other, and advancing and retracting provided in the other A locking mechanism 3b that engages with the advancing / retreating member 13 when the member 13 moves forward and locks the car 2 and the counterweight 3 in the ascending / descending direction is provided.

Description

The present invention relates to a self-propelled elevator in which a driving device for raising and lowering a car and a counterweight is mounted on the counterweight, and in particular, in an elevator in which an operator gets on the car and performs maintenance inspection work on the driving device. The present invention relates to an elevator car fixing device for fixing a car to a counterweight.
BACKGROUND Figure 16 is a perspective view of a conventional self-propelled elevator is proposed for example in Japanese Unexamined 9-124259 JP. FIG. 17 is a schematic diagram of this elevator apparatus. In FIG.16 and FIG.17, the cage | basket | car 2 and the counterweight 3 are arrange | positioned in the elevator hoistway. The car 2 and the counterweight 3 are guided by a car-side guide rail 4 and a weight-side guide rail 5 each having a T-shaped cross section and move up and down in the hoistway.
The counterweight 3 is equipped with a drive device 7 that winds the rope 6 and drives the rope 6. The counterweight 3 is further provided with a brake device 31 that clamps and brakes both side surfaces of the brim protruding from the outer periphery of the sheave of the driving device 7 with spring pressure.
A car side rope fixing member 10 for fixing the rope 6 on the car 2 side and a weight side rope fixing member 11 for fixing the rope 6 on the counterweight 3 side are provided in the upper part of the hoistway.
An elevator control device 35 including a drive inverter of the drive device 7 mounted on the counterweight 3 is installed at a predetermined position below the hoistway.
An elevator cable 32 including a power line for driving the drive device 7 mounted on the counterweight 3, a brake drive line, a speed feedback encoder line for speed / position detection, and the like is installed in the hoistway.
The elevator cable 32 is installed between the control device 35 and the drive device 7 via a relay point 33 on the building side and a relay point 34 below the car 2.
A car 2 is suspended on a rope 6 between the car-side rope fixing member 10 and the return wheel 8. The car 2 is hung on the rope 6 by winding a rope 6 around a suspension wheel 9 pivotally supported on the side surface of the car.
The counterweight 3 is suspended from the rope 6 between the counterweight-side rope fixing member 11 and the return wheel 8. The counterweight 3 is hung on the rope 6 by winding the rope 6 around the sheave of the driving device 7.
When the driving device 7 provided on the counterweight 3 is driven, the sheave rotates, and the car 2 and the counterweight 3 move up and down in the hoistway 1. When the car 2 is lowered, the counterweight 3 is raised, and when the car 2 is raised, the counterweight 3 is lowered.
In a so-called self-propelled elevator in which an elevator having such a configuration, that is, a driving device 7 for raising and lowering the car 2 is mounted on the counterweight 3, when the maintenance operation of the driving device 7 is performed, the operator can The car 2 is moved to a position where the driving device 7 can be maintained and inspected, that is, a position where the counterweight 3 and the counterweight 3 pass each other, and the driving device 7 is inspected by extending the hand from the top of the car 2.
As described above, as a device for mechanically preventing unintentional movement of the car 2 during work when it is necessary to carry out maintenance and inspection work on the car 2 from the car 2 as described above, conventionally, a stationary part in a hoistway such as a guide rail is used. A car fixing device for fixing a car has been proposed.
FIG. 18 is a perspective view of a conventional car fixing device proposed in, for example, Japanese Patent Laid-Open No. 2000-203774.
In FIG. 18, an operation mechanism 50 having a lock bar 41 that advances and retreats in the longitudinal direction and a bracket 42 that fixes the lock bar 41 at a predetermined position is provided on the upper portion of the car 2. The lock bar 41 has an operation lever 43 protruding from the side surface. The operation lever 43 is removed from the operation lever insertion groove 42b of the bracket 42, the lock bar 41 is moved in the direction of the fixing mechanism 44, and the longitudinal end of the lock bar 41 is moved to the lock bar of the fixing mechanism 44 provided on the guide rail. When inserted into the insertion hole 44a, the car 2 is mechanically fixed. Thereafter, the operation lever 43 is inserted into the operation lever insertion groove 42a to prevent the engagement between the fixing mechanism 44 and the lock rod 41.
In the conventional elevator car fixing device having such a configuration, the car 2 is fixed to a hoistway stationary part such as a guide rail, for example. Therefore, when the rope 6 is extended due to aging, the position of the driving device 7 with respect to the car fixing position is lowered, which causes a problem in maintenance and inspection work.
The present invention has been made to solve the above-described problems. The car fixing device is configured to connect and fix a car and a counterweight, and the car is not affected by the aging of the rope. It is an object of the present invention to provide an elevator car fixing device that can make the position of the driving device relative to the fixed position constant.

  The elevator car fixing device according to the present invention includes a rope that is wound around a return wheel disposed in an upper part of the elevator hoistway and is disposed in the hoistway, and a rope that is suspended at one end of the rope, Drive that is suspended by the rope between the counterweight-side rope fixing member at the upper part of the hoistway where the other end of the rope is fixed and the return wheel, and goes down when the car goes up and goes up and down the car An elevator provided with a counterweight provided with a device, which is provided on one of the car and the counterweight and which advances and retreats toward the other, and when the advancing and retracting member provided on the other side moves forward and backward And a locking mechanism for locking the car and the counterweight in the ascending / descending direction. Therefore, when an operator gets on the car and performs maintenance and inspection of the drive device, unintentional movement of the car during work can be mechanically prevented and the work can be easily performed in a stable state. The position of the drive device with respect to the cage fixing position can be made constant without being affected by the aging of the rope.

1 is a perspective view of an elevator showing an elevator car fixing apparatus according to Embodiment 1 of the present invention.
FIG. 2 is a view showing an operator working on the car in addition to FIG.
FIG. 3 is a schematic diagram schematically illustrating the elevator according to the first embodiment.
FIG. 4 is a schematic view showing a state where a car and a counterweight are connected and an operator performs maintenance and inspection work.
FIG. 5 is a diagram for explaining the coupling device according to the first embodiment.
FIG. 6 is a diagram illustrating a state where the coupling device of FIG. 5 is coupled.
FIG. 7 is a diagram for explaining the coupling device according to the second embodiment.
FIG. 8 is a diagram illustrating a state in which the coupling device of FIG. 7 is coupled.
FIG. 9 is a view for explaining the coupling device of the third embodiment.
FIG. 10 is a diagram for explaining the coupling device of the fourth embodiment.
FIG. 11 is a schematic diagram schematically illustrating the elevator according to the fifth embodiment.
FIG. 12 is a schematic view showing a state in which a car and a counterweight are connected and an operator performs maintenance and inspection work.
FIG. 13 is a schematic diagram schematically illustrating the elevator according to the sixth embodiment.
FIG. 14 is a schematic view showing a state in which the car and the counterweight are positioned and the worker performs the connecting work.
FIG. 15 is a diagram illustrating a state of a side surface, an upper surface, a front surface, and a rear surface of the light receiving detection switch.
FIG. 16 is a perspective view of a conventional self-propelled elevator.
FIG. 17 is a schematic diagram of a conventional elevator apparatus.
FIG. 18 is a perspective view of a conventional car fixing device.

1 is a perspective view of an elevator showing an elevator car fixing apparatus according to Embodiment 1 of the present invention. FIG. 2 is a diagram showing the worker who works on the ladder in addition to FIG. FIG. 3 is a schematic view schematically showing the elevator of the present embodiment. FIG. 4 is a schematic view showing a state where a car and a counterweight are connected and an operator performs maintenance and inspection work.
In the figure, a car 2 and a counterweight 3 are disposed in an elevator hoistway 1. The car 2 and the counterweight 3 are raised and lowered in the hoistway 1 by being guided by the car-side guide rail 4 and the weight-side guide rail 5 each having a T-shaped cross section. The counterweight 3 includes a weight frame 3b in which four frame members having a U-shaped cross section are connected in a rectangular shape, and a plurality of weights 3a that are accommodated in the weight frame 3b and adjust the weight by changing the number. Have. The counterweight 3 is further equipped with a driving device 7 for raising and lowering the car 2 and the counterweight 3. The counterweight 3 is provided with a brake device as in the prior art, but is omitted here.
A return wheel 8 is provided above the hoistway 1. A rope 6 is wound around the return wheel 8 and hangs down in the hoistway 1. One end of the rope 6 hangs down once and then turns upward, and is fixed to a car-side rope fixing member 10 provided at the upper part of the hoistway 1. Similarly, the other end of the rope 6 hangs downward and then turns upward, and is fixed to a counterweight-side rope fixing member 11 provided at the upper part of the hoistway 1.
A car 2 is suspended on a rope 6 between the car-side rope fixing member 10 and the return wheel 8. The car 2 is suspended by a rope 6 by winding a rope 6 around a suspension wheel 9 provided at the lower part of the car. The counterweight 3 is suspended from the rope 6 between the counterweight-side rope fixing member 11 and the return wheel 8. The counterweight 3 is suspended from the rope 6 by winding the rope 6 around the sheave 7 a of the driving device 7.
When the driving device 7 provided on the counterweight 3 is driven, the sheave 7 a rotates, and the car 2 and the counterweight 3 are moved up and down in the hoistway 1. When the car 2 is lowered, the counterweight 3 is raised, and when the car 2 is raised, the counterweight 3 is lowered.
This embodiment is a so-called 2: 1 roping elevator in which the moving distance of the car 2 with respect to the moving length of the rope 6 is a ratio of 2: 1.
A connecting device 12 for connecting the car 2 and the counterweight 3 to each other in the ascending / descending direction is provided on the upper surface of the car 2.
A control device 35 for operating the elevator is installed in the lower part of the hoistway 1. An elevator cable is provided between the control device 35 and the drive device 7 as in the prior art, but is omitted here.
FIG. 5 is a view for explaining the coupling device of this embodiment. FIG. 6 is a diagram illustrating a state in which the coupling device is coupled. The connecting device 12 includes a lock rod 13 as an advancing / retracting member provided in the car 2 and moving forward and backward toward the counterweight 3, and a front end portion of the lock rod 13 inserted when the lock rod 13 provided in the counterweight 3 advances. The locking hole 3c is provided. The locking hole 3c is formed in the weight frame 3b. When the car 2 and the counterweight 3 are connected, the locking hole 3c is formed at a position where the driving device 7 can be easily inspected. The weight frame 3b constitutes a locking mechanism that engages with the lock rod 13 and locks the car 2 and the counterweight 3 in the ascending / descending direction.
The lock bar 13 is slidably supported by a bracket 14 as a guide member provided on the car frame 2a. The bracket 14 has through holes 14a formed on two side surfaces of the bracket. The lock rod 13 is disposed through the two through holes 14 a and is supported so as to be able to advance and retreat toward the counterweight 3. An operation lever 13 a is even erected on the outer peripheral surface of the lock rod 13. The operation lever 13 a engages with a U-shaped guide slit 14 b formed in the bracket 14 to restrict the movement of the lock bar 13. When the operating lever 13a is engaged with the lateral groove at the forward end of the guide slit 14b, the lock rod 13 is fixed at the connecting position. When the operating lever 13a is engaged with the lateral groove at the retracted end of the guide slit 14b, the lock rod 13 is fixed at the retracted position.
In the so-called self-propelled elevator in which the elevator driving device 7 is mounted on the counterweight 3 as in this embodiment, when the maintenance of the driving device 7 is inspected, the operator is as shown in FIGS. Then, board the car 2, move the car 2 and the counterweight 3 near each other, and extend the hand from the car to inspect the drive unit 7.
When connecting the car 2 and the counterweight 3, the operator positions the car 2 and the counterweight 3. Then, at the position where the positioning of the car 2 and the counterweight 3 is completed, the operating lever 13a is removed from the lateral groove in the retracted position, the lock bar 13 is advanced, and the lock bar 13 is inserted into the locking hole 3c. The operation lever 13a is fixed to the lateral groove at the connection position. By this operation, the car 2 and the counterweight 3 are restricted from moving in the up and down direction.
In the elevator car fixing device having such a configuration, the rope 6 wound around the return wheel 8 disposed in the upper part of the elevator hoistway and disposed in the hoistway 1, and one end of the rope 6. The car 2 is suspended by the rope 6 between the counterweight-side rope fixing member 11 and the return wheel 8 at the upper part of the hoistway 1 to which the other end of the rope 6 is fixed. A car fixing device provided in an elevator having a counterweight 3 provided with a driving device 7 for raising and lowering the car 2 while lowering when the car 2 is raised, toward the counterweight 3 provided in the car 2 And a weight frame 3b that is provided on the car 2 and engages with the lock bar 13 when the lock bar 13 moves forward and holds the car 2 and the counterweight 3 in the ascending / descending direction. Is When an operator gets on the car 2 and performs maintenance and inspection of the drive device 7, unintentional movement of the car 2 during work can be mechanically prevented, and the work can be easily performed in a stable state. it can. Further, the position of the driving device 7 with respect to the car fixing position can be always constant without being affected by the aging of the rope 6.
The lock bar 13 has a substantially bar shape extending in the forward / backward direction and is guided by the bracket 14 so as to be slidable in the forward / backward direction. The weight frame 3b has a locking hole 3c into which the front end of the lock bar 13 is inserted. Therefore, a mechanism for locking the car and the counterweight to each other in the ascending / descending direction can be easily configured.
In this embodiment, the lock bar 13 is provided in the car 2 and the locking hole 3c is provided in the counterweight 3. Conversely, the car 2 is provided with the locking hole 3c, and the counterweight 3 is provided. A lock rod 13 may be provided.

FIG. 7 is a diagram for explaining the coupling device according to the second embodiment. FIG. 8 is a diagram illustrating a state where the coupling device is coupled. The coupling device of the present embodiment includes a lock rod 16 attached to the weight frame 3b and a locking member 17 provided on the car frame 2a. The lock rod 16 has a substantially T-shape consisting of a short base portion 16b and a long main body portion 16a connected to the center of the base portion 16b, and the base portion 16b is pivotally supported by a presser foot 18 so as to be rotatable. Then, the lock bar 16 rotates around the base portion 16b as a fulcrum and moves horizontally between a retracted position that is substantially parallel to the weight frame 3b and a connecting position that is substantially perpendicular to the weight frame 3b.
The locking member 17 provided on the car frame 2a is formed with a locking groove 17a that opens outward in the horizontal direction. When the lock rod 16 rotates to the connecting position side at the position where the car 2 and the counterweight 3 are positioned, the main body portion 16a of the lock rod 16 engages with the locking groove 17a of the locking member 17. The locking member 17 constitutes a locking mechanism that engages with the lock rod 16 and locks the car 2 and the counterweight 3 to each other in the ascending / descending direction.
The lock bar 16 and the presser foot 18 attached to the weight frame 3b are provided at a position where the car 2 and the weight 3 are connected so that the drive device 7 can be easily inspected.
In the elevator car fixing device having such a configuration, when the operator gets on the car 2 and performs maintenance and inspection of the driving device 7, the car 2 and the counterweight 3 are connected by the lock rod 16 to the car. 2 can be fixed to mechanically prevent unintentional movement of the car during maintenance and inspection work.

FIG. 9 is a view for explaining the coupling device of the third embodiment. In the present embodiment, a storage confirmation switch 20 for detecting that the lock rod 13 of the coupling device 12 is in the storage position is provided in the car frame 2a. The storage confirmation switch 20 is electrically connected to an elevator control device 35. The control device 35 operates by taking in the signal of the storage confirmation switch 20 in addition to signals from other peripheral devices, and constitutes a safety circuit that prevents the elevator from being driven when the lock bar 13 is not in the storage position. Yes. Other configurations are the same as those of the first embodiment.
In the elevator car fixing device having such a configuration, the elevator cannot be moved in a state where the lock bar 13 is not completely placed in the storage position. Therefore, it is possible to prevent forgetting to release the coupling device 12 and prevent damage to the equipment.

FIG. 10 is a diagram for explaining the coupling device of the fourth embodiment. In the present embodiment, a tension spring 21 is extended between the bracket 14 and the rear end of the lock bar 13 as an elastic member that urges the lock bar 13 in the forward direction. A roller 22 is provided at the tip of the lock rod 13.
The weight frame 3b as a locking mechanism has a parallel surface 3d parallel to the lifting direction and a locking hole 3c formed in the parallel surface 3d. The lock rod 13 is urged by the tension spring 21 to slide the roller 22 in a state where the roller 22 is in contact with the parallel surface 3d, and when the lock rod 13 is aligned with the locking hole 3c, the front end portion is locked to the locking hole. Insert in 3c.
In addition, a retraction check switch 20 is provided for detecting that the lock bar 13 is in the approximate retreat position. The reverse confirmation switch 20 is electrically connected to an elevator control device 35. The control device 35 operates by taking in the signal of the reverse check switch 20 in addition to the signal from other peripheral devices, and when the lock bar 13 is not in the reverse position, the raising / lowering speed of the car is set to a fine speed. Further, when the lock bar 13 is inserted into the locking hole 3c and locked, the raising and lowering of the car is stopped. That is, the control device 35 constitutes an operation restriction unit.
In the elevator car fixing device having such a configuration, for example, when the lock bar 13 is brought into contact with the parallel surface 3d of the weight frame 3b in a state where the counterweight 3 is slightly above the positioning position, the tension spring 21 The lock rod 13 is counterbalanced by force and biased toward the weight 3 side. In this state, when the positioning of the counterweight 3 and the car 2 is advanced, the roller 22 slides on the parallel surface 3d, and when the lock bar 13 and the lock hole 3c are positioned, the lock bar 13 is locked. Enter 3c automatically. Therefore, the alignment operation becomes easy.

FIG. 11 is a schematic diagram schematically illustrating the elevator according to the fifth embodiment. FIG. 12 is a schematic view showing a state in which a car and a counterweight are connected and an operator performs maintenance and inspection work. In the figure, two return wheels 8 are provided in the upper part of the hoistway. A rope 6 is wound around the return wheel 8 and hangs down in the hoistway 1. One end of the rope 6 hangs downward and then turns upward, and is fixed to a counterweight-side rope fixing member 11 provided at the upper part of the hoistway 1.
The counterweight 3 is suspended from the rope 6 between the counterweight-side rope fixing member 11 and the return wheel 8. The counterweight 3 is further equipped with a driving device 7 for raising and lowering the car 2 and the counterweight 3. The counterweight 3 is suspended from the rope 6 by winding the rope 6 around the sheave 7 a of the driving device 7.
The other end of the rope 6 is connected to the cage 2 only in the same manner. As a result, the car 2 is suspended from the rope 6.
When the driving device 7 provided on the counterweight 3 is driven, the sheave 7 a rotates, and the car 2 and the counterweight 3 are moved up and down in the hoistway 1. When the car 2 is lowered, the counterweight 3 is raised, and when the car 2 is raised, the counterweight 3 is lowered. On the upper surface of the car 2, a connecting device 12 similar to that of the first embodiment is provided.
In the elevator car fixing device having such a configuration, even in the so-called 1: 1 roping self-propelled elevator in which the moving distance of the car 2 with respect to the moving length of the rope 6 is 1: 1, the connecting device 12 is also used. Can be applied.

FIG. 13 is a schematic diagram schematically illustrating the elevator according to the sixth embodiment. FIG. 14 is a schematic view showing a state in which the car and the counterweight are positioned and the worker performs the connecting work. FIG. 15 is a diagram illustrating a state of a side surface, an upper surface, a front surface, and a rear surface of the light receiving detection switch. In the present embodiment, a light receiving detection switch 24 that detects that an object has approached by receiving the emitted laser beam is provided on the upper portion of the car 2. On the other hand, the counterweight 3 is provided with a reflecting plate 25. The light receiving type detection switch 24 constitutes a positioning detection means for receiving the detection light emitted toward the reflecting plate 25 and detecting the positioning.
As shown in FIG. 15, the light receiving detection switch 24 has a launching part 24 a and a light receiving part 24 b on the front surface. Then, a laser beam as detection light emitted from the emitting unit 24a is received by the light receiving unit 24b. When the counterweight 3 reaches the positioning position, the reflector 25 returns the laser beam to the light receiving unit 24b.
A buzzer 26 is provided at the rear of the light receiving detection switch 24. The buzzer 26 operates based on a detection signal output when the light receiving detection switch 24 receives detection light, and generates an electronic sound. The buzzer 26 constitutes notification means for notifying the operator that positioning has been completed.
In the elevator car fixing device having such a configuration, if the light receiving detection switch 24 is turned on, an electronic sound is generated when the car 2 and the counterweight 3 are aligned, thereby facilitating positioning work. To do.
In this embodiment, the buzzer 26 is used as the notification means. However, for example, a lamp may be turned on.

Industrial applicability

  The present invention relates to a self-propelled elevator in which a car and a driving device for raising and lowering a counterweight are mounted on the counterweight, and in particular, an elevator on which a worker gets on the car to perform maintenance and inspection work on the driving device In the above, it is useful as a car fixing device for fixing the car to the counterweight.

Claims (12)

A rope wound around a return wheel disposed at the upper part of the elevator hoistway and disposed in the hoistway;
Whether suspended from one end of the rope,
The rope is suspended by the rope between the counterweight-side rope fixing member at the upper part of the hoistway to which the other end of the rope is fixed and the return wheel, and when the car is lowered, it is lowered when the car is raised, Provided in an elevator having a counterweight provided with a driving device for raising and lowering the car;
An advancing / retreating member that is provided on one of the cage and the counterweight and that advances and retreats toward the other;
An elevator mechanism provided on the other side, which engages with the advancing / retracting member when the advancing / retreating member moves forward, and interlocks the car and the counterweight in the ascending / descending direction. Car fixing device. The advance / retreat member has a substantially rod shape extending in the advance / retreat direction and is guided by the guide member so as to be slidable in the advance / retreat direction,
The elevator car fixing device according to claim 1, wherein the locking mechanism has a locking hole into which a front end portion of the advance / retreat member is inserted. An elastic member for urging the advance / retreat member in the forward direction;
The advance / retreat member has a roller at the front end,
The locking mechanism has a parallel surface parallel to the elevation direction and the locking hole formed in the parallel surface,
The advancing / retracting member is urged by the elastic member to slide the roller in a state where the roller is in contact with the parallel surface, and when the roller reaches the same position as the locking hole, the front end is engaged with the engaging member. The elevator car fixing device according to claim 2, wherein the elevator car fixing device is inserted into a blind hole. The advancing / retreating member is substantially rod-shaped and is pivotally supported at the rear end so as to be rotatable in a horizontal plane,
The elevator car fixing device according to claim 1, wherein the locking mechanism includes a locking groove with which a main body portion of the advance / retreat member is engaged. A retreat confirmation switch for detecting a retreat position of the advance / retreat member;
A safety circuit that operates based on a signal of the reverse confirmation switch and that prevents the elevator from being driven when the advance / retreat member is not in the reverse position is further provided. The elevator car fixing device according to claim 1. A retreat confirmation switch for detecting a retreat position of the advance / retreat member;
The vehicle further comprises an operation restricting means that operates based on a signal from the retraction check switch and that makes the ascending / descending speed of the car a slight speed when the advance / retreat member is not in the retreat position. The elevator car fixing device according to any one of the above. Positioning detection means for detecting the positioning of the car and the counterweight, and notification means that operates based on a signal from the positioning detection means and notifies the operator that the positioning has been performed. The elevator car fixing device according to any one of claims 1 to 6. The positioning determination means receives a detection light emitted toward one of the reflector and the counterweight provided on the cage and the counterweight, and detects the positioning. The elevator car fixing device according to claim 7, further comprising: a type detection switch. The elevator car fixing device according to any one of claims 1 to 8, wherein the advance / retreat member is provided in the car. The elevator car fixing device according to any one of claims 1 to 8, wherein the advance / retreat member is provided on the counterweight. The other end of the rope is fixed to a car side rope fixing member at the upper part of the hoistway,
The said cage | basket | car is arrange | positioned between the said cage side rope fixing member and the said return wheel, and is connected with the suspension vehicle suspended via the said rope. The elevator car fixing device according to claim 1. The elevator car fixing device according to any one of claims 1 to 10, wherein the other end of the rope is connected to the car.

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