JP2809571B2 - Tension device for elevator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator sheave device, and more particularly to an elevator sheave device in which a hanging rope does not make a dangerous movement when a car or the like suddenly stops.

[0002]

2. Description of the Related Art Conventionally, as this kind of elevator sheave device, there is one disclosed in Japanese Utility Model Laid-Open No. 49-103156 and Japanese Patent Laid-Open No. 54-155550. In FIG. 14, 1 is a hoistway, 2 is a car, 3 is a counterweight, 4 is a drive sheave directly connected to a hoist (not shown), 5 is wound around the drive sheave 4, and the car 2 And a hoisting rope hanging the counterweight 3.

Reference numeral 6 denotes a balancing rope whose both ends are respectively connected to the lower part of the car 2 and the balancing weight 3, reference numeral 7 denotes a tension pulley for applying tension to the balancing rope 6, and reference numeral 8 denotes the vertical movement of the tension pulley 7. This rail 8 is firmly fastened to a beam 9 provided at a lower portion in the hoistway 1.

FIG. 15 is an enlarged front view showing a portion of the tension sheave 7 in FIG. In the drawing, reference numeral 10 denotes a frame of a tensioner 7, reference numeral 11 denotes a shaft fixed to the frame 10, reference numeral 12 denotes a vehicle rotatably mounted on the shaft 11 and around which a balancing rope 6 is wound, and reference numerals 13a and 13b denote frames. 10 is a guide having a guide groove projecting from the base 10 and engaging with the rail 8.
A tension sheave 7 is constituted by 3a and 13b.

Reference numeral 14 denotes a stopper for holding the rail 8 so that the upper end thereof is in contact with the lower end of the guide 13a. Reference numeral 15 denotes friction between the stopper 14 and the contact surface of the rail 8 so that the stopper 14 does not slip down. A spring 16 for generating a force is a bar 18 rotatably mounted on a stopper 14 via a pin 17, 18.
Reference numeral 20 denotes a roller which is rotatably attached to a lower end portion of the bar 16 via a pin 19. Reference numeral 20 denotes a clamp which protrudes from the frame 10, and is disposed symmetrically with respect to the center of the rail 8. A surface 20 facing the roller 19 of the gripper 20 is also provided.
a is inclined so as to approach the rail 8 as going downward. 21 is a stopper 14, a spring 15, a bar 16, and a pin 1.
7, a lock device comprising rollers 18, pins 19, and clamps 20.

Reference numeral 22 denotes an elevator stop switch mounted on the frame 10, and 23 denotes an operation piece mounted on the lock device 21. When the stretcher 7 jumps over a distance S, the operation piece 23 becomes an elevator stop switch 22.
And the switch 22 is actuated.

Next, the operation will be described. If sudden braking is applied while either the car 2 or the counterweight 3 is descending, the other tends to jump due to inertia. As a result, the tension wheel 7 also tries to jump up. However, tensioner 7
Rises slightly, the surface 20a of the gripper 20 is inclined, so that the rail 8 and 18 and the gap between the roller 18 and the gripper 20 immediately become zero, and the roller 18, the rail 8 and the gripper 20 The three members engage, and the upward movement of the tensioning wheel 7 is prevented. For this reason, jumping of the car 2 or the counterweight 3 is also suppressed. At this time, the above gap is set to a minimum value within a range where the lock device 21 does not operate when the tensioning sheave 7 moves upward at the start and stop of the elevator, so that the jump of the car 2 or the counterweight 3 is also minimized. Can be suppressed.

Further, since the hoisting rope 5 and the balancing rope 6 are stretched by use for a long period of time, the tension pulley 7 moves downward with time, but the gap changes due to the movement of the tension pulley 7. Not to be. That is, the spring 1
5 is appropriately adjusted so that the catch 14 and the rail 8 can be adjusted.
A frictional force is generated on the contact surface of the lock device 21 such that the lock device 21 does not fall off due to its own weight, and also slides downward when the weight of the tension wheel 7 is added to the lock device 21's own weight. Further, since the stopper 14 is in contact with the guide 13a,
When the hoisting rope 5 and the balancing rope 6 are extended, the catch 1
4, the weight of the tension pulley 7 is applied, and the lock device 21 is moved downward by the length of the rope and stopped. Therefore, roller 1
The mutual position between 8 and the grip 20 is always kept constant.

FIG. 16 shows, for example, Japanese Patent Application Laid-Open No. 51-143.
FIG. 1 is a configuration diagram showing a conventional elevator sheave device disclosed in Japanese Patent Publication No. 239-239. In the figure, 31 is a cylinder fixed to the floor below the hoistway, 32 is a liquid filled in the cylinder 31, 33 is a rod attached to the frame 10 of the tension wheel 7 and inserted into the cylinder 31, and 34 is a rod. A piston fixed to the lower end of the rod 33; 35 is a valve plate supported by the piston 34 in the cylinder 31;
Is an orifice provided on the valve plate 34 and having an appropriate size and throttle.

In the above construction, when the hoisting rope 5 and the balancing rope 6 expand and contract due to load and temperature, the liquid 32 and the orifice 36 having a viscosity suitable for the expansion and contraction speed.
And the piston 34 and the valve plate 35
And the pulley 7 are displaced at the same speed with little resistance. For this reason, the tension of the balancing rope 6 can be kept constant when unnecessary.

Also, when the counterweight 3 jumps up,
The jumper 7 causes a rapid jump and a large jump force.
2 produces a large resistance on the valve plate 35. At this time, the valve plate 3
Since the wheel 5 is supported by the piston 34, the tension wheel 7 is in a fixed state. Therefore, the energy of the jump of the counterweight 3 can be transmitted immediately using the counter rope 6,
The deceleration of the car 2 can be effectively reduced.

Further, since the jumping amount of the tension pulley 7 can be suppressed to a considerably small value, the balancing rope 6 is less likely to come off the tension pulley 7. On the other hand, when the sheave 7 falls after jumping up, a large resistance force is generated only on the valve plate 35, and the piston 34 and the sheave 7 fall quickly, so that the turbulence of the balancing rope 6 can be suppressed. it can.

[0013]

14 and 15 of the conventional elevator sheave devices constructed as described above, the hoisting rope 5 and the balancing rope are used. When the ropes 5 and 6 contract by a certain amount or more due to daily climate change, etc., only the tensioner 7 can be moved upward. Since the lock device 21 moves and the lock device 21 does not move, the elevator stop switch 22 comes into contact with the operation piece 23 to malfunction, and the elevator stops even though it is not abnormal, and passengers may be trapped. There was a problem that operation could not be performed safely and accurately.

In addition, in the apparatus shown in FIG. 16, it is necessary to provide another attenuator in order to suppress vibration of the sheave 7 generated during normal operation. This is a mechanism that generates a resistance force proportional to the ascending speed, and there is a problem that the tension pulley 7 cannot be fixed strictly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has been made to solve the problem of rope shrinkage due to daily climate and environmental changes, not to mention aging rope elongation. It is an object of the present invention to obtain an elevator overhaul device that can follow the vehicle.
It is another object of the present invention to provide an elevator sheave device that can be used both as a sheave attenuator and a lock device, can be reduced in size and simplified in size as a whole, and can improve accuracy.

[0016]

According to a first aspect of the present invention, there is provided a tensioning sheave device for an elevator in which a lock device for locking a sudden pulling of a wire rope is installed, and the wire rope is connected to the tensioning sheave. .

According to a second aspect of the present invention, there is provided a tensioning sheave device for an elevator, wherein a locking device for locking a sudden pulling of a wire rope is mounted on a mounting surface by floating, and the wire rope is connected to the tensioning sheave and a locking device. An elevator stop switch for stopping the elevator by detecting upward movement is provided.

According to a third aspect of the present invention, there is provided an elevator upholstery device, wherein an inclined piece which rotates by a sudden jump of the upholstery is supported by an inclined piece spring, and a roller is rotated between the inclined piece and the rail. A lock device is provided which is movably engaged and arranged so that a roller bites between the inclined piece and the rail when the inclined piece is operated.

According to a fourth aspect of the present invention, there is provided an elevator overhaul device comprising:
A jack bolt for pushing up the inclined piece is provided.

According to a fifth aspect of the present invention, there is provided an elevator overhanging device wherein an elevator stop switch is provided on one of the inclined piece and the engaging member so that the operation of the inclined piece activates the elevator stop switch. It was done.

According to a sixth aspect of the present invention, there is provided an elevator pulley apparatus provided with a roller spring for urging the rollers downward.

According to a seventh aspect of the present invention, there is provided an elevator sheave device, wherein an orifice is provided in a cylinder filled with fluid, the piston being connected to the sheave and moving up and down, and attenuating the vertical movement of the piston. And a valve for closing the orifice and locking the piston when the piston is largely moved upward is held floating by a spring with respect to the orifice.

The elevator pulley device according to the invention of claim 8 is provided with an elevator stop switch which operates by detecting the pressure in the cylinder, facing the inside of the cylinder.

According to a ninth aspect of the present invention, there is provided an elevator sheave device in which a valve is provided with a valve-side orifice so that when the piston is largely moved upward, the valve-side orifice and the orifice are connected to increase damping force. It was made.

[0025]

According to the first aspect of the present invention, the abrupt pulling out of the wire rope is locked. However, when the wire rope is pulled out gently due to contraction of the hoisting rope and the balancing rope, the drum rotates to rotate the wire rope. Send out.

According to the second aspect of the present invention, when the lock device moves upward due to jumping of the tension pulley, an elevator stop switch is operated to safely stop the elevator.

According to the third aspect of the present invention, when the stretcher gently expands and contracts, the rollers follow by rotating between the rail and the inclined piece, and when the stretcher jumps up suddenly, the inclined piece operates. The roller cuts between the rail and the inclined piece.

According to the fourth aspect of the present invention, when the inclined piece is returned after the operation, the inclined piece is pushed up by the jack bolt and removed, and then the rollers are removed.

According to the fifth aspect of the present invention, the operation of the elevator stop switch is confirmed by manually rotating the inclined piece during maintenance and inspection.

According to the sixth aspect of the present invention, the rollers are urged downward by the roller springs, so that the rollers can more reliably bite between the inclined piece and the rail during the operation of the inclined piece,
Improve reliability.

According to the seventh aspect of the present invention, the vibration and vertical movement of the normal pulley are damped by the orifice, and when the pullover jumps up, the orifice is closed by the valve and the piston is locked.

According to the eighth aspect of the present invention, when the orifice closes due to jumping of the pulley and the pressure in the cylinder changes, the elevator stop switch detects this and operates to stop the elevator.

According to the ninth aspect of the present invention, the damping force at the time of jumping up of the tension pulley is set arbitrarily in addition to the damping force of the piston at the time of normal operation by appropriately setting the orifice on the valve side.

[0034]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In each drawing, the same or corresponding parts as those in FIGS. 14 to 16 are denoted by the same reference numerals, and description thereof will be omitted.

Embodiment 1 FIG. 1 is a side view showing an elevator pulley device according to an embodiment of the present invention. In the figure, 41 is a lock device provided on the pit floor 1a, 42 is a wire rope provided in the lock device 41, and the tip is connected to the lower part of the tension sheave 7.

FIG. 2 is a front view showing the inside of the lock device 41 of FIG. 1, and FIG. 3 is a side view of FIG. In the figure, 43
Is a box, 44 is a shaft provided on the box 43 so as to be able to move up and down within a predetermined range, and 45 is a drum rotatably provided on the shaft 44. The wire rope 42 is wound around the drum 45. Reference numeral 46 denotes a gear joined to both ends of the drum 45. The gear 46 has a number of teeth 46a. Reference numeral 47 denotes a claw attached above the gear 46 in the box 43, and the claw 47 and the gear 46 constitute locking means. 48 is a lower urging spring provided between the shaft 44 and the box 43 to urge the shaft 44 downward. 49 is provided between the shaft 44 and the drum 45, and the drum 45 is provided in a direction in which the wire rope 42 is wound. Is a spiral spring (spiral spring) as a winding spring for urging the spring.

Next, the operation will be described. First, when the hoisting rope 7 moves downward due to the extension of the hoisting rope 5 and the balancing rope 6, the moved amount of the wire rope 42 is wound around the drum 45 by the force of the mainspring 49. Further, when the tensioning pulley 7 moves upward due to the contraction of the hoisting rope 5 and the balancing rope 6, the tip of the wire rope 42 is pulled upward, and the drum 45 is moved against the force of the mainspring 49. The wire rope 42 that has rotated and moved is sent out.

At this time, since the upward movement of the tension pulley 7 is gentle, the drum 45 rotates while being pulled downward by the lower urging spring 48, and the drum 45 itself cannot move upward. Absent.

On the other hand, when the tension pulley 7 jumps up suddenly at the time of abnormality, the wire rope 42 pulls up the drum 45 with a force larger than the spring force of the lower urging spring 48. Move quickly upwards. As a result, one of the teeth 46a of the gear 46 disposed at both ends of the drum 45 engages with the claw 47, and the rotation of the drum 45 is locked. As a result, the drum 45 is
2 will not be sent out, and jumping upward of the tensioning wheel 7 will be prevented.

As described above, the lock device 41 for locking only when the wire rope 42 is suddenly pulled out is used, and the elevator stop switch (not shown) is activated when the drum 45 is moved upward. As a result, even if the hoisting rope 5 or the balancing rope 6 contracts during normal operation, the locking device 41 does not operate, and the elevator stop switch does not operate, so that an accident such as erroneous operation of the switch may trap passengers. And the elevator is operated safely and accurately.

Embodiment 2 FIG. Next, FIG. 4 is a side view showing an elevator pulley device according to an embodiment of the second aspect of the present invention. In the figure, a lock device 41 similar to that of the first embodiment is floatingly mounted on a support beam 51 fixed on a pit floor 1a, which is an installation surface, via a floating spring 52. Further, a detection switch 53 which is an elevator stop switch is attached to the support beam 51.

In such an elevator pulley device, since the floating spring 52 which is not compressed by the winding force of the lock device 41 in the normal state is used, the lock device is used when the hoisting rope 5 and the balancing rope 6 are expanded and contracted. 41 does not move, and the detection switch 53 does not operate. However, at the same time as the lock device 41 is activated by the jump of the tension sheave 7, the detection switch 53 is activated, and the elevator is stopped. Therefore,
As in the first embodiment, the elevator can be operated safely and accurately.

Embodiment 3 FIG. Next, FIG. 5 is a front view showing an elevator pulley device according to one embodiment of the invention of claims 3 to 6, and FIG. 6 is a plan view of FIG. In the figure, reference numeral 61 denotes an inclined piece rotatably attached to the frame 10 of the tension sheave 7 by a pin 62; 63, a gripper which is an engagement member attached to the frame 10 adjacent to the inclined piece 61; The inclined piece spring is provided between the gripper 63 and the inclined piece 61, and biases the inclined piece 61 in a direction of separating from the gripper 63, that is, in a direction approaching the rail 8. The inclined piece 61 is configured such that when the inclined piece spring 64 is compressed and comes into contact with the fork 63, the inclination angle with respect to the rail 8 matches the fork 63.

Reference numeral 65 denotes a roller which is rotatably engaged with the inclined piece 61 and the rail 8 and 66 is disposed above the roller 65 via a mounting member 67 and has a downward biasing force. The roller spring 66 includes a roller 65
And a slight gap is maintained.

Reference numeral 68 denotes an elevator stop switch provided on the gripper 63, reference numeral 69 denotes an operation piece provided on the inclined piece 61 for operating the elevator stop switch 68, and reference numeral 70 denotes an operating piece provided on the gripper 63. It is a jack bolt for pressing the inclined piece 61 in the inclined direction and moving it when engaged with the gold 63. Note that the above-mentioned inclined piece 61, pin 62, gripper 63, spring for inclined piece 64, roller 65, roller spring 66, mounting metal 67, elevator stop switch 68, operating piece 69 and jack bolt 70.
Thus, the lock device 60 is configured.

Next, the operation will be described. The coefficient of friction μ between the rail 8 and the inclined pieces 61 and 65 is μ = 0.
If it is set to 1 to 0.3, the inclination angle α of the inclined piece 61 in the normal state
₁ is set so that α ₁ > 30 to 35 °.
For this reason, when the tension pulley 7 moves downward due to the extension of the hoisting rope 5 and the balancing rope 6, the roller 65 follows while riding on the inclined piece 61. Furthermore, the shrinkage of the hoisting rope 5 and the balancing ropes 6, when the tension wheel 7 has moved slowly upwards, since the wedge angle alpha ₁ is larger than 30 to 35 ° of tilt piece 61, rollers 65, It follows the pulley 7 without biting between the rail 8 and the inclined piece 61.

On the other hand, when the emergency stop device of the elevator is operated, the counterweight 3 instantly jumps up due to the impact, whereby the hoisting rope 5 comes off the groove of the drive sheave 4 or the hoisting rope 3 There is a possibility that a serious accident may occur in which the rope 5 and the balancing rope 6 are violently stuck and cut off by the equipment in the hoistway 1. A similar phenomenon occurs when the car 2 or the counterweight 3 collides with the shock absorber. In such a case, the pulley 7 jumps upward instantaneously at an acceleration of about 0.7 G to 2.0 G.

When the tension pulley 7 jumps up at the above-described acceleration, the inclined piece 61 is moved by the inertia force of the inclined piece spring 64.
, And is engaged with the gripper 63 as shown in FIG. The inclined piece 61 at this time
Wedge angle (tilt angle) alpha ₂ of becomes the alpha ₂ = 10 to 15 ° about the roller 65 by the wedge action bites between the rails 8 and the inclined piece 61. As a result, the upward jump of the tension pulley 7 is stopped, and its kinetic energy is absorbed by the inclined piece 61 and the clamp 63.

Further, the roller 65 also tends to jump upward in response to the acceleration 0.7 G to 2.0 G when the tensioning wheel 7 jumps, but the roller 65 is more securely moved between the rail 8 and the inclined piece 61. A roller spring 66 is arranged above the roller 65 to make it bite. That is, the rollers 65 are pressed downward by the roller springs 66, so that the jumping pulley 7 is more reliably prevented from jumping up. On the other hand, the inclined piece spring 64
Indicates that the tilting piece 6 has a swing acceleration of about 0.3 G during normal operation.
1 is securely supported, so there is no fear of malfunction.

As described above, when the inclined piece 61 rotates and engages with the gripper 63, the elevator stop switch 68 is operated by the operation piece 69, and the power supply to the drive motor is cut off, so that the elevator can be safely driven. Stopped. here,
By arranging the elevator stop switch 68 on the gripper 63 and the operation piece 69 on the inclined piece 61,
At the time of normal maintenance and inspection, the switch operation can be confirmed only by rotating the inclined piece 61 by hand, and maintenance is easy.

When returning after operation, the roller 65 can be easily removed by removing the pin 62 and sliding the inclined piece 61 upward with the jack bolt 70 in the inclined direction. Therefore, the returning operation can be easily performed without bringing in a large jig.

Embodiment 4 FIG. In the third embodiment, the rail 8 is sandwiched between the rollers 65 from both left and right sides. For example, as shown in FIG. 8, the roller 65 and the inclined piece 61 are provided only on one side of the rail 8 and the other side is provided. May be provided with a wire 71 not parallel to the rail 8.

Similarly, as shown in FIG.
The roller spring 66 may be provided between the pin 72 at the center of the roller 65 and the pin 73 provided on the inclined piece 61.

Further, in the third embodiment, the operation piece 69 is disposed on the inclined piece 61 and the elevator stop switch 68 is disposed on the hand 63. However, if the operation of the inclined piece 61 is not hindered, the operation is reversed. You may. In addition, especially the operation piece 6
9, the elevator stop switch 68 may be directly operated by the inclined piece 61 itself.

Embodiment 5 FIG. Next, FIG. 9 is a side view showing an elevator overhaul device according to one embodiment of the present invention. In the figure, reference numeral 81 denotes an arm attached to the frame 10 of the stretcher 7, reference numeral 82 denotes a cylinder standing on the pit floor 1a, and reference numeral 83 denotes an upper end attached to the arm 81 and a lower end inserted into the cylinder 82. Rod.

FIGS. 10A and 10B are cross-sectional views showing the inside of the cylinder 82 of FIG. 9, wherein FIG. 10A shows a state during normal operation, and FIG. The cylinder 82 is filled with the liquid 32. In the figure, 84 is a piston attached to the lower end of a rod 83, 85 is a plurality of orifices provided on the piston 84, 86 is a valve provided on the piston 84,
87 is a spring provided between the piston 84 and the valve 86, 88 is a valve stopper fixed to the rod 83 on the valve 86, 89 is the liquid 32 in the upper part of the cylinder 82.
An elevator stop switch (pressure switch) for detecting the pressure of the elevator.

Next, the operation will be described. During normal operation, vibration occurs in the tension sheave 7, but the amount of vertical movement caused by the vibration is very small. Therefore, the valve 86 hardly moves, and the damping effect can be obtained only by the orifice 85 provided in the piston 84. it can. Since the up-and-down movement of the tension sheave 7 due to the expansion and contraction of the hoisting rope 5 and the balancing rope 6 is very gentle, the valve 86 follows the piston 84 while being floated and held by the spring 87.

On the other hand, when the tension wheel 7 jumps up, the piston 84 rises rapidly, whereby the valve 86 is pushed by the liquid 32 inside and the spring 87 contracts.
As shown in (b), the valve 86 and the piston 84 come into close contact with each other. As a result, the orifice 85 of the piston 84 is closed. Thus, when the orifice 85 is closed,
The piston 84 will compress the liquid 32 and the sheave 7 will be locked. Then, when the pressure rise of the liquid 32 becomes equal to or more than the set value, this is the switch 8 for stopping the elevator.
At 9 the elevator is safely stopped.

As described above, the elevator stop switch 89 does not malfunction when the rope is contracted due to the elongation of the rope over time or due to daily changes in the climate and the environment, thereby preventing the passenger from being trapped. In addition, there is no need to provide a separate attenuator for the pulley 7, and the whole is inexpensive, small-sized and simplified, and the accuracy is improved.

Embodiment 6 FIG. In the fifth embodiment, the valve 86 is arranged on the piston 84 via the spring 87.
As shown in FIG. 11, a valve stopper 90 is mounted near the top of the cylinder 82, a valve 86 is disposed thereon, and a spring 8 is disposed between the valve 86 and the ceiling of the cylinder 82.
7 may be provided. In this case, the orifice 85 that connects the valve 86 in the cylinder 82 and the lower side of the piston 84 may be provided outside the cylinder 82 without providing the orifice 85 in the piston 84.

In such an apparatus, as in the case of the fifth embodiment, the valve 8 is used for the vibration and vertical movement of the pulley 7 during normal running.
6 hardly moves, and the orifice 91 alone provides a damping effect. Also, when the sheave 7 jumps up, the valve 86 comes into close contact with the ceiling of the cylinder 82 and the orifice 91 is closed, so that the piston 84 compresses the liquid 32 above it and the sheave 7 is locked. The compression of the liquid 32 is detected by the elevator stop switch 89, and the elevator is safely stopped.

Embodiment 7 FIG. In the sixth embodiment, the pressure switch is used as the elevator stop switch 89. However, as shown in FIG. 12, for example, an elevator stop switch 92 is installed on the cylinder 82, and the elevator is stopped through the cylinder 82. Switch 92
By attaching an operating rod 93 for operating the valve 86 to the valve 86, the movement of the valve 86 can be detected mechanically.

In such a device, when the valve 86 largely moves upward due to the jump of the tension sheave 7, the operating rod 93 operates the elevator stop switch 92 to safely stop the elevator. Further, the operating state of the valve 86 can be visually observed from outside the cylinder 82.

Embodiment 8 FIG. Next, FIG. 13 is a sectional view showing an essential part of an elevator pulley device according to an embodiment of the ninth aspect of the present invention, showing a state in which a piston 84 comes into close contact with a valve 86 by jumping up of the pulley 7. ing.
In the figure, 94 is provided on the valve 86 and the piston 8
Reference numeral 4 denotes a valve-side orifice which is connected to the orifice 85 when it comes into close contact with the valve 86 and increases the damping force. The configuration of the other parts is the same as that of FIG.

In such an apparatus, by appropriately setting the diameter of the valve-side orifice 94, the resistance of the tension sheave 7 when jumping up can be arbitrarily set. That is,
The damping force for absorbing vibration during normal elevator travel and the damping force for jumping up of the pulley 7 can be set individually.

[0066]

As described above, in the elevator pulley according to the first aspect of the present invention, the lock device for locking the sudden pulling of the wire rope is installed, and the wire rope is connected to the pulley. Not to mention long-term rope elongation, it is possible to follow rope shrinkage due to everyday climate and environmental changes, etc., thus preventing passenger confinement accidents due to malfunctions,
This has the effect that the elevator can be operated safely and accurately.

Further, in the elevator sheave device according to the second aspect of the present invention, a lock device for locking a sudden pulling of the wire rope is mounted on the installation surface by floating, and the wire rope is connected to the sheave and the lock device is locked. Since the detection switch for detecting the upward movement of the device and stopping the elevator is provided, in addition to the same effect as the invention of the above-mentioned claim 1, the effect that the accident due to the jumping of the stub can be more reliably prevented. To play.

Further, according to a third aspect of the present invention, there is provided an elevator upholstery device in which an inclined piece which is turned by a sudden jump of the upholstery is supported by an inclined piece spring, and a roller is provided between the inclined piece and the rail. A lock device that is rotatably engaged so that the rollers bite between the inclined piece and the rail when the inclined piece is operated, so that it can be used for everyday weather, not to mention long-term rope elongation. In addition, it is possible to follow a rope contraction due to an environmental change or the like, thereby preventing a passenger from being trapped due to a malfunction and to operate the elevator safely and accurately.

Further, in the elevator pulley device according to the fourth aspect of the present invention, the jack member for pushing up the inclined piece is provided on the engaging member with which the inclined piece is engaged at the time of its operation. In addition to the same effects as the invention of
There is an effect that the return operation after the operation can be easily performed without bringing in a large-scale jig.

According to the fifth aspect of the present invention, the elevator sheave device has an elevator stop switch provided on one of the inclined piece and the engaging member, and the operation of the inclined piece activates the elevator stop switch. Therefore, in addition to the same effects as those of the third aspect of the present invention, the operation of the switch can be checked only by rotating the inclined piece by hand at the time of maintenance and inspection, and the maintenance and inspection work can be facilitated. It has the effect of being able to.

Further, in the elevator pulley device according to the invention of claim 6, a roller spring for urging the rollers downward is provided so that the rollers are pushed between the rail and the inclined pieces when the inclined pieces are operated. Therefore, in addition to the same effect as the third aspect of the present invention, it is possible to more reliably prevent the jumper from jumping up and to improve the safety and reliability.

Further, in the elevator pulley device according to the present invention, a piston which is connected to the pulley and moves up and down is provided in a cylinder filled with fluid, and the vertical movement of the piston is attenuated. The orifice is closed and the valve that closes the orifice and locks the piston when the piston moves up significantly is held floating by a spring with respect to the orifice. Also, it can follow rope contraction due to environmental changes, etc., can also serve as a tensioner attenuator and a lock device, can be inexpensive, small and simple as a whole, and can improve accuracy. It produces effects such as:

In the elevator pulley device according to the eighth aspect of the present invention, the elevator stop switch which operates by detecting the pressure in the cylinder is provided facing the inside of the cylinder. In addition to the same effect, jumping of a pullover can be detected earlier, safety and reliability can be improved, and adjustment of the operating point can be omitted compared to a mechanical type. It works.

Further, in the elevator sheave device according to the ninth aspect of the present invention, the valve is provided with a valve-side orifice.
Since the valve-side orifice and the orifice are connected to each other when the piston is largely moved upward, the damping force is increased. This has the effect that the damping force and the damping force at the time of jumping over the tension wheel can be set individually.

[Brief description of the drawings]

FIG. 1 is a side view showing an elevator pulley device according to an embodiment of the present invention.

FIG. 2 is a front view showing the inside of the lock device of FIG. 1;

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a side view showing an elevator pulley device according to an embodiment of the present invention.

FIG. 5 is a front view showing an elevator pulley device according to an embodiment of the present invention.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a front view of an essential part showing an operation state of the inclined piece of FIG. 4;

FIG. 8 is a front view showing an essential part of an elevator pulley device according to another embodiment of the third and sixth aspects of the present invention.

FIG. 9 is a side view showing an elevator pulley device according to an embodiment of the present invention.

FIG. 10 is a sectional view showing the inside of the cylinder of FIG. 9;

FIG. 11 is a sectional view showing an essential part of an elevator pulley device according to another embodiment of the present invention.

FIG. 12 is a sectional view showing a main part of an elevator pulley device according to still another embodiment of the seventh aspect of the present invention.

FIG. 13 is a sectional view showing an essential part of an elevator pulley device according to an embodiment of the ninth aspect of the present invention.

FIG. 14 is a schematic configuration diagram showing an example of a conventional elevator.

FIG. 15 is an enlarged front view of the elevator pulley device of FIG. 14;

FIG. 16 is a configuration diagram showing another example of a conventional elevator sheave device.

[Description of Signs] 1a Pit floor (installation surface) 7 Tensioner 8 Rail 32 Liquid (fluid) 41 Locking device 42 Wire rope 45 Drum 46 Gear (Locking means) 47 Claw (Locking means) 48 Downward biasing spring 49 Spring Winding spring) 52 Floating spring 53 Detection switch (Elevator stop switch) 60 Lock device 61 Inclined piece 63 Hand ring (engaging member) 64 Inclined piece spring 65 Roller 66 Roller spring 68 Elevator stop switch 70 Jack Bolt 82 Cylinder 84 Piston 85 Orifice 86 Valve 87 Spring 89 Elevator stop switch 91 Orifice 94 Valve side orifice

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kazutaka Nakamura 1 Hishicho, Inazawa City Inazawa Works, Mitsubishi Electric Corporation (56) References JP-A-54-155550 (JP, A) JP-A-61-211286 (JP, A) Japanese Utility Model Showa 49-103156 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B66B 7/10 B66B 7/06

Claims (9)

(57) [Claims] 1. A wire rope connected to a tensioner, a rotatable and vertically movable drum around which the wire rope is wound, a lower biasing spring for biasing the drum downward, in a direction in which the wire rope is wound. A take-up spring for urging the drum so as to rotate, and a lock device having a lock means for preventing rotation of the drum when the drum moves upward against the lower urging spring. A tensioner device for an elevator, comprising: 2. A wire rope connected to a tensioner, a rotatable and vertically movable drum around which the wire rope is wound, a lower urging spring for urging the drum downward, in a direction of winding the wire rope. A take-up spring for urging the drum to rotate, and a lock unit for preventing the drum from rotating when the drum moves upward against the lower urging spring; An elevator comprising: a lock device floatingly mounted via a floating spring; and an elevator stop switch which operates when the lock device moves upward against the floating spring. For stretcher equipment. 3. An inclined piece rotatably mounted within a predetermined range on a tension wheel that moves up and down along a rail, and biases the inclined piece in a direction in which an end of the inclined piece approaches the rail. The inclined piece and the rail are rotatably engaged between the inclined piece and the tension wheel, and the inclined piece and the rail are arranged when the inclined piece rotates against the inclined piece spring. A tensioning device for an elevator, comprising a locking device having a roller that bites between the tensioning device and the vehicle. 4. An inclined piece detachably attached to a tension sheave moving up and down along a rail and rotatably mounted within a predetermined range, and said inclined piece in a direction in which an end of the inclined piece approaches the rail. A spring for biasing the inclined piece, and a rotatably engaged arrangement between the inclined piece and the tension wheel. When the inclined piece rotates against the inclined piece spring, the inclined piece And an engagement member that is provided on the tension wheel and that the inclined piece engages during operation,
A tensioning device for an elevator, comprising: a lock device provided on the engagement member and having a jack bolt for pushing up the inclined piece engaged with the engagement member. 5. An inclined piece rotatably mounted within a predetermined range on a tension wheel that moves up and down along a rail, and biases the inclined piece in a direction in which an end of the inclined piece approaches the rail. The inclined piece and the rail are rotatably engaged between the inclined piece and the tension wheel, and the inclined piece and the rail are arranged when the inclined piece rotates against the inclined piece spring. And an engagement member provided on the tension wheel and engaged with the inclined piece at the time of operation, and provided on any one of the inclined piece and the engagement member, and operating the inclined piece. And a lock device having an elevator stop switch operated by the controller. 6. An inclined piece rotatably mounted within a predetermined range on a tension wheel that moves up and down along a rail, and biases the inclined piece in a direction in which an end of the inclined piece approaches the rail. The inclined piece and the rail are rotatably engaged between the inclined piece and the tension wheel, and the inclined piece and the rail are arranged when the inclined piece rotates against the inclined piece spring. And a lock device having a roller for urging the rollers downward, and a tensioning device for an elevator. 7. A cylinder filled with a fluid, a piston connected to a pulley and moving up and down in the cylinder,
An orifice for attenuating the vertical movement of the piston, and a valve which is held floating by a spring with respect to the orifice and closes the orifice and locks the piston when the piston is largely moved upward. A tensioner device for an elevator, comprising: 8. A cylinder filled with fluid, a piston connected to the pulley and moving up and down in the cylinder,
An orifice for attenuating the vertical movement of the piston, a valve floatingly held by a spring with respect to the orifice, and a valve for closing the orifice and locking the piston when the piston is largely moved upward; And an elevator stop switch which is provided facing the inside and operates by detecting the pressure in the cylinder. 9. A cylinder filled with a fluid, a piston connected to a pulley and moving up and down in the cylinder,
An orifice for attenuating the vertical movement of the piston, and a valve-side orifice floatingly held by a spring with respect to the orifice and connected to the orifice to increase the damping force when the piston is largely moved upward. A tension sheave device for an elevator, comprising a valve provided.