JPH0912242A - Winding machine for elevator - Google Patents

Abstract

PURPOSE: To provide a winding machine for an elevator capable of carrying out brake release and cage lowering operation without damaging an instrument safely in an elevator shaft or from outside of the elevator shaft by a maintenance worker in case when the elevator stops between floors due to power failure, etc. CONSTITUTION: This is furnished with a winding machine 2A provided in an elevator shaft 1 and consisting of an electric motor 4 to generate driving force to elevate a cage and a speed reducer 5 having an automatic tightening property to transmit the driving force to elevate the cage and connected to this electric motor 4, a brake 7A to work on this winding machine 2A and to emergency stop the cage, a brake release means 13 to forcibly release this brake 7A and a nut to be fastened on the winding machine 2A on which a handle 14 with a ratchet mechanism is fit to revolve the winding machine 2A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator car in which a hoisting machine is installed in a hoistway, which causes a maintenance worker to perform a descent operation of the elevator when the car stops between floors due to a power failure or a failure. The present invention relates to an elevator hoisting machine for carrying out.

[0002]

2. Description of the Related Art Conventionally, in home elevators and the like,
11 and 12, in which, 1 is a hoistway, 2 is a hoisting machine 2 installed at the bottom of the hoistway 1, 3 is a drum of the hoisting machine, 4 is a car ascending and descending car. The electric motors 5 that generate the driving force that causes the electric motors 5 are speed reducers that reduce the driving force that is generated by the electric motor 4. The driving force generated by the electric motor 4 is reduced by the speed reducer 5, and the main rope wound around the drum 3 of the hoisting machine is supported by the return wheel provided in the upper portion of the hoistway 1, and the tip portion of the main rope is supported. An elevator is used in which a car is suspended and the drum 3 is normally and reversely rotated by a driving force of an electric motor 4 to elevate and lower the car in the hoistway 1.
Generally, the speed reducer 2 is composed of a worm shaft and a worm gear having an automatic tightening property, and the force from the drum 3 is not transmitted to the hoisting machine.

FIG. 13 is a block diagram showing a conventional brake release manual winding device for an elevator hoisting machine disclosed in, for example, Japanese Patent Laid-Open No. 3-18576, and FIG. 14 is an enlarged view of a main part of FIG. FIG. 15 is a cross-sectional view as seen from above the hoistway. In the figure, 1 is a hoistway, 2 is a hoisting machine, 3 is a drum around which a main rope is wound, 4 is an electric motor that generates a driving force for raising and lowering a car, 5 is a speed reducer, and 6a is a car lower frame (sill). Is. Reference numeral 7 is a brake of the hoisting machine 2, 71 is a disc pad which rotates together with the shaft 2a of the hoisting machine which is a drive shaft, 72 is a brake armature disposed below the disc pad 71 and pressed by a spring 73, and 74 is It is a fixed member. Reference numeral 8 denotes an angled release plate provided above the disc pad 71 and having a horizontal portion 81 and a vertical portion 82. The tip portion of the horizontal portion 81 is fixed to the brake armature 72 by a connecting bolt 83, and the vertical portion 82 side The portion is supported on the fixing member 74 by the fulcrum bolt 84.

Reference numeral 9 denotes a rotational force transmission mechanism, which is fitted and fixed to the upper end portion of the shaft 2a and has an output member 92 made of a bevel gear, an input member 91 made of a bevel gear meshed with the output member 92, and a vertical portion. The boss 93 and the boss 9 of the input member 92 supported by a bearing 94 fixed to 82 so as to be rotatable and axially movable.
It is composed of a pair of engagement pins 95 which are projected at the end of 3. Reference numeral 10 is a hand-wound handle mechanism, 101 is a lever, 102 is a connecting plate fixed near the tip and the base end of the lever 101, and 103 is a lever 101 which is rotatably restrained by the connecting plate 102 in the axial direction. The handle shaft is inserted and supported in parallel with the handle shaft 104, the operation portion 104 is fixed to the base end portion of the handle shaft 103, and the joint member 105 is provided with a pair of engagement grooves 106 at the tip end portion of the handle shaft 103. The engagement pin 95 is engaged with the engagement groove 106. Upper and lower bearings 94 and 112 are fixed to the vertical portion 82, and lower lever receivers 111 and 112 are fixed to the vertical portion 82 so as to project upward and downward toward the inspection port 12, and the tip of the lever 101 is detachably engaged. Are configured to be combined.
121 is an inspection door.

Next, the operation for lowering the elevator when the elevator stops between floors due to a power failure or a failure will be described. A maintenance worker opens the inspection door 121 provided facing the elevator hall, and opens the inspection door 12 through the lever 101 of the manual winding handle mechanism 10 and the handle shaft 10.
3 and insert the tip of the lever 101 into the lower lever receiver 11
The engaging groove 106 formed in the joint member 105 of the handle shaft 103 is engaged with the engaging pin 95 provided on the boss 93 of the input member 92. In this state, by lifting the landing side end of the manual winding handle mechanism 10, the lever 101 and the lower lever receiver 112 are engaged with each other, thereby releasing the release plate 8.
Is rotated about the fulcrum bolt 84 as a fulcrum, and the connecting bolt 8
At 3, the brake armature 72 is pushed down against the spring 73, and the brake armature 72 is separated from the disc pad 71, so that the brake 7 can be released.

Further, since the engaging groove 106 of the joint member 105 and the engaging pin 95 are engaged by rotating the handle shaft 103 while holding the operating portion 104, the handle shaft 103 and the input member 92 are engaged. Even if the boss 93 of
The input member 92 can be rotated around the axis of the boss 93, and the shaft 2a of the hoisting machine 2 can be rotated via the output member 91 to manually raise and lower the car from outside the hoistway 1. . Then, the car lower frame 6a of the car passes between the hoisting machine 2 and the landing wall near the inspection port 12, and the lever 101 and the handle shaft 103 of the manual winding handle mechanism 10 come close to each other and the relative position where they are likely to interfere with each other. Then, the manual winding handle mechanism 10 is pulled out to the landing side, the lever 101 is removed from the lower lever receiver 112, and the handle shaft 103 is removed from the input portion 92. Subsequently, the hand-winding handle mechanism 10 is turned upside down, the lever 101 is engaged with the upper lever receiver 111, and the handle shaft 103 is engaged with the input member 92. Can be raised and lowered.

[0007]

In the conventional elevator hoisting machine as described above, the maintenance worker is required to check the entrance 1 of the landing.
The manual winding handle mechanism 10 must be inserted into the hoistway 1 from 2 to engage with the rotational force transmitting mechanism 9 and the lever receivers 111 and 112. Workability at the time of engaging with 111 and 112, and workability after rotating to rotate the shaft 2a of the hoist for lowering the car to rescue the passengers trapped in the car. It was so bad that it was not possible to quickly rescue the passengers trapped in the car.
In addition, when the hand-wound handle mechanism 10 is inserted into the hoistway 1 in an inevitable posture, the brake 7 is released and the handle shaft 103 is rotated to lower the car. There is a risk of interference with the basket lower frame 6a, and the manual winding handle mechanism 10 may have to be re-engaged. In addition, the manual winding handle mechanism 10 must be pushed down or pulled up to rotate the operating portion 104 while releasing the brake to lower the car, which requires a constant effort to release the brake. There was another problem. Also, if you use not a speed reducer with automatic tightening property but a speed reducer with good reverse efficiency that only lowers the brake to lower the car, the car lowers with the release of the brake and the hoistway Manual winding mechanism 1 in 1
There is another possibility that there is a danger that 0 or the maintenance worker may come into contact with the falling basket, which is dangerous.

The present invention has been made in order to solve the above-mentioned problems, and a first object thereof is a hoisting machine for an elevator, which allows a maintenance worker to safely and quickly lower an emergency stopped car. Is what you get. Also, the second
In addition to the first object, the purpose of (1) is to obtain an elevator hoisting machine that can reduce the effort for releasing the brake when lowering the car. further,
A third object is, in addition to the first object, to obtain an elevator hoisting machine capable of releasing the brake of the elevator hoisting machine in a safe environment outside the hoistway without the risk of interference with the car. Is. In addition to the third object, the fourth object is to obtain an elevator hoisting machine capable of further improving workability. A fifth object is to obtain an elevator hoisting machine that can reliably rescue a person trapped in a car.

[0009]

An elevator hoisting machine according to the present invention is provided in a hoistway and is connected to a motor for generating a driving force for raising and lowering a car and for raising and lowering the car. A hoisting machine consisting of a speed reducer having an automatic tightening property for transmitting the driving force, a brake that acts on the hoisting machine to stop the car in an emergency, and a brake opening means for forcibly opening the brake, And a nut fixed to the hoist, to which a handle with a ratchet mechanism is detachably fitted so as to rotate the hoist.

Further, a manual release arm for holding the brake releasing means for forcibly releasing the brake in the brake released state is provided.

Further, a hoisting machine comprising an electric motor provided in the hoistway for generating a driving force for raising and lowering the car, and a reducer connected to the electric motor and transmitting the driving force for raising and lowering the car, Electric power is supplied from a normal power source that drives the electric motor, acts on the hoisting machine, and causes an emergency stop of the car, an electromagnetic brake, power supply from the normal power source, and a special power source different from the normal power source. And a switch provided outside the hoistway for switching power supply.

Further, the special power source uses the battery of the automatic landing device during a power failure.

Furthermore, the brake coil of the electromagnetic brake is classified into a plurality of independent systems.

Further, the present invention is provided with an emergency stop motor for lowering the car which has been stopped when the electromagnetic brake is opened by electric power from a special power source.

[0015]

Since the elevator hoisting machine according to the present invention uses the speed reducer having the automatic tightening property, even if the brake is forcibly released, the car does not drop and the maintenance worker is safe in the hoistway. The handle with a ratchet mechanism (commercially available) can be detachably inserted into the nut fixed to the hoist, and the shaft of the reducer can be easily operated by the simple operation of the handle with the ratchet mechanism. It is possible to safely and easily lower the emergency stopped car to a predetermined position by rotating the car.

Further, a manual release arm for holding the brake release means for forcibly releasing the brake in the brake released state is provided, and the brake release means is kept in the brake released state when the hoisting machine is rotated by the handle with the ratchet mechanism. It is possible to engage the manual release arm without holding it and hold it in the engaged state.

When electric power is not supplied from the normal power source to the electromagnetic brake, the electromagnetic brake stops the car that fixes the hoist, but switches the switch provided outside the hoistway to turn on the special power source. Since it is supplied to the electromagnetic brake, the hoisting machine is released from the fixed state and the car can be lowered.

Further, as the special power source for releasing the fixing of the hoisting machine, since the battery of the automatic landing device at the time of power failure is used,
The hoist can be unfixed and the car can be lowered without newly connecting a special power supply.

Furthermore, since the brake coils of the electromagnetic brake are classified into a plurality of systems, and the brake coils of each system function independently, the hoisting machine can be fixed or released only by the brake coils of each system. can do.

Further, an emergency stop starting motor for lowering the emergency stopped car is provided, and the car is lowered by the driving force of the emergency stop starting motor when the hoisting machine is unlocked by the electromagnetic brake. be able to.

[0021]

【Example】

Embodiment 1 FIG. 1A and 1B are configuration diagrams showing the configuration of an elevator hoisting machine according to an embodiment of the present invention. FIG. 1A is a side view and FIG. 1B is a top view. In the figure, 1 is a hoistway, 2A is a hoist installed in the hoistway 1 (lower part),
3 is a drum around which the main rope is wound, 4 is an electric motor that generates a driving force, and 5 is a speed reducer that has an automatic tightening property (self-lock: for example, a worm with a small lead angle) that reduces the driving force generated by the electric motor. Is. In general, the lead angle δ is calculated by tan δ = μ / cos α, where μ is the friction coefficient and α is the tooth pressure angle. The hoisting machine 2A rotates the drum 3 around the main rope (for example, via a worm gear) via the speed reducer 5 based on the driving force generated by the electric motor 4, and the rotation from the drum 3 does not occur. It is not transmitted to the reduction gear. 7A is a car brake, and a hoist 2A
The disc pad 71 that rotates with the shaft of the hoisting machine 2A that is a drive shaft connected to the electric motor that protrudes to the upper part of the disc, and the brake armature 72 that is disposed below the disc pad 71 and is pressed by a spring or the like. There is.
Reference numeral 13 is a manual release arm that releases the brake 7A by pushing down, and 14 is a detachable ratchet that gives a driving force (rotational force) for lowering the car to a nut fixed to the shaft end of the hoisting machine 2A. It is an expression manual handle.

Next, an operation for lowering the elevator when the elevator stops between floors due to a power failure or a failure will be described. The maintenance worker first enters the elevator hoistway 1 and pushes the manual release arm 13 downward. By pushing down the manual release arm 13, the connecting bolt 132 pushes down the brake armature 72 against the spring or the like by using the fulcrum bolt 131 as a fulcrum, and the disc pad 71 held by the brake armature 72 is released to release the brake 7A. release.
At this time, there is a maintenance worker in the hoistway 1, but since the reducer having an automatic tightening property in which the force acts only in one direction is used for the hoisting machine 2A, for example, the brake 7
Even if A is released and the force that the drum 3 tries to rotate due to the weight of the car (the force in the direction in which the car falls) acts, the self-tightening property, that is, the force due to the weight of the car due to the worm and the worm gear is hoisted. Is not transmitted to the aircraft,
The car does not drop, and the safety of the maintenance worker in the hoistway 1 can always be maintained.

Then, the maintenance worker fits a ratchet type manual handle 14 which is generally commercially available, into a nut fixed to the shaft of the hoisting machine 2A, and reciprocates left and right at an angle at which force can be easily applied (see FIG. 1 (b)). By the ratchet mechanism of the ratchet type manual handle 14, a force is applied to the shaft of the hoisting machine 2A via the nut to gradually lower the car only when moving in one direction (for example, counterclockwise). You can In this embodiment, the ratchet type manual handle 14 has a detachable structure and is used by being fitted into the nut only when necessary. However, the ratchet mechanism is fixed to the shaft of the hoisting machine 2 in advance. You may keep it.

As described above, in this embodiment, since the speed reducer having the automatic tightening property is used for the hoisting machine 2A, even if the maintenance worker manually releases the brake 7A in the hoistway 1, the car is There is no danger of falling, there is no need to work from the inspection opening outside the hoistway, and it is possible to work safely and comfortably, and workability is improved. Further, since the ratchet type manual handle 14 is used, when the driving force for lowering the car is applied to the hoisting machine 2A, the driving force is directly applied to the shaft of the hoisting machine 2A by the ratchet type manual handle 14. The driving force for gradually lowering the car can be efficiently transmitted to the hoisting machine 2A. Furthermore, due to the ratchet mechanism, it is not necessary to change the manual handle onto the nut or keep turning it, which improves workability and does not affect the workability of maintenance personnel, so it is easy to apply force. it can. Further, a device for releasing the brake 7A and a mechanism for giving a driving force (rotational force for rotating the shaft of the hoisting machine 2A) for lowering the car to the hoisting machine 2A by a maintenance worker are simple. Since it is formed by a structure (a ratchet handle that is generally sold), the manufacturing cost of the hoisting machine 2A itself can be reduced.

Embodiment 2 FIG. FIG. 2 is a configuration diagram showing a configuration of an elevator hoisting machine according to another embodiment of the present invention,
2A is a side view and FIG. 2B is a top view. In the figure, reference numeral 133 is a fixing device for fixing the manual release arm 13 in the released state, and other configurations are the same as those in the first embodiment.
Therefore, the description is omitted.

Next, an operation for lowering the elevator when the elevator is stopped between floors due to a power failure or a failure will be described. The maintenance worker first enters the elevator hoistway 1 and pushes the manual release arm 13 downward to release the brake 7A.
By engaging the fixing device 131 with the brake 7A
Is left released. Here, there is a maintenance worker in the hoistway 1, but as the hoisting machine 2A, a speed reducer having an automatic tightening property (for example, a worm gear) in which a force acts only in one direction is used. Therefore, even if the brake 7A is held in the released state, no force acts in the direction in which the car falls, the car does not descend, and the safety of the maintenance worker in the hoistway 1 The sex can be maintained. Further, at this time, the fixing device 131 is attached to the manual release arm 1.
Since 3 is engaged, it is not necessary to continue to apply the force for pushing down the manual release arm 13, and it is possible to focus only on lowering the car, which further improves workability.

Then, the maintenance worker reciprocates the ratchet type manual handle 14 left and right at an angle where a force can be easily applied (see FIG. 2B). By the ratchet mechanism of the ratchet type manual handle 14, a force can be applied to the shaft of the hoisting machine 2A to gradually lower the car only when moving in one direction (eg, counterclockwise).

As described above, in this embodiment, in addition to the effect of the first embodiment described above, it is not necessary to continue to apply the force for pushing the manual release arm 13 downward, and the work for lowering the car can be performed with one hand. It can be performed and the workability is further improved.

Embodiment 3 FIG. FIG. 3 is a cross-sectional view showing the structure of an elevator hoisting machine according to an embodiment of the present invention.
FIG. 4 is a circuit diagram showing a circuit configuration of a brake device for an elevator hoisting machine. In FIG. 3, reference numerals 1, 3 and 6 are the same as those in the above-described embodiment, and therefore the description thereof is omitted. 2B is a hoisting machine using a speed reducer with high reverse efficiency (for example, a helical gear, a worm with a large lead angle, etc.), and 7B is a hoisting machine 2
An electromagnetic brake attached to B, which releases when energized and restrains the hoisting machine 2B when deenergized, and 15 is a special power source in addition to the power source normally used for the electromagnetic brake 7B from outside the hoistway 1. Battery for supplying power as
Is a battery connection terminal provided outside the hoistway 1, 17A
Is a switch for switching the circuit of the electromagnetic brake 7B provided outside the hoistway 1 between the normal power supply and the battery 15. In FIG. 4, 18 is a normal power source of the electromagnetic brake 7B, and 19 is a brake energizing relay.

Next, the operation of the brake device for the elevator hoisting machine in this embodiment will be described. If the car stops between floors due to a power failure or failure, the brake energizing relay 1
9 is released, and the supply of the normal power source 18 to the electromagnetic brake 7B is stopped. When the power supply of the normal power source 18 is stopped, the electromagnetic brake 7B that is released when energized and restrains the hoist when deenergized causes the electromagnetic brake 7B in the deenergized state to move the hoist 2B. Therefore, it is usually impossible to manually operate the hoisting machine 2B.

Therefore, the maintenance worker connects the battery 15 to the battery connection terminal 16 provided outside the hoistway 1 and switches the switch 17A also installed outside the hoistway 1 to switch the power supply to the electromagnetic brake 7B. Normal power supply 18
To the battery 15 which is an emergency power source. As a result, the circuit of 15-7B-17A is opened and the electromagnetic brake 7B is released. At the time of releasing the electromagnetic brake 7B, the hoisting machine 2B in the present embodiment uses a speed reducer having high reverse efficiency. Therefore, only by releasing the electromagnetic brake 7B, the car is naturally operated by the action of gravity acting on the car. It can be gradually lowered. At this time, needless to say, the switch 17A is appropriately switched to brake the car descending as necessary.

As described above, in this embodiment, since the hoisting machine 2B having the speed reducer with high reverse efficiency is used, the maintenance worker connects the battery 15 which is the emergency power source and the switch to the battery 15. By simply switching, the car stopped between floors can be automatically lowered to a predetermined landing. Therefore, the workability of the maintenance worker in an emergency can be improved. Further, it is not necessary for a maintenance worker to enter the hoistway 1 and the electromagnetic brake 7B of the hoisting machine 2B can be operated from outside the hoistway 1 to lower the car, which improves the safety of the work of the maintenance worker. improves.

Embodiment 4 FIG. FIG. 5 is a cross-sectional view showing the structure of an elevator hoisting machine according to an embodiment of the present invention.
FIG. 6 is a circuit diagram showing a circuit configuration of a brake device for an elevator hoisting machine. In the third embodiment described above, the battery 15 is connected to the battery connection terminal 16 provided outside the hoistway 1 and the switch 17A is switched to supply the emergency power of the electromagnetic brake 7B. Then, the power is supplied from the battery 20 of the automatic landing apparatus during a power failure. The other configurations are the same as those in the third embodiment, and thus the description thereof is omitted.

Normally, at the time of a power failure in an elevator apparatus equipped with an automatic landing apparatus at the time of power failure, the car is automatically landed at the entrance of the hall by the function of the automatic landing apparatus. However, in the event of an abnormality in the automatic landing device or an abnormality in the system of the elevator device, the automatic landing device does not function, the brake energizing relay 19 is released, and power is supplied to the electromagnetic brake 7B of the normal power source 18. Is stopped. Normal power supply 1
When the power supply of No. 8 is stopped, the electromagnetic brake 7B in the deenergized state restrains the hoisting machine 2B by the function of the electromagnetic brake 7B that releases it when energized and restrains the hoisting machine when deenergized. Resulting in.

Therefore, the maintenance worker switches the switch 17B installed outside the hoistway 1 to switch the power supply source to the electromagnetic brake 7B from the normal power source 18 to the battery 20 of the automatic floor landing apparatus during a power failure. By this, 20-7B-17
The circuit of B communicates, the electric power of the battery 20 is supplied to the electromagnetic brake 7B, and the electromagnetic brake 7B is released. At the time of releasing the electromagnetic brake 7B, the hoisting machine 2B in the present embodiment uses a speed reducer having high reverse efficiency. Therefore, only by releasing the electromagnetic brake 7B, the car is naturally operated by the action of gravity acting on the car. It can be gradually lowered. On this occasion,
It goes without saying that the switch 17B is appropriately switched to brake the car descending if necessary.

As described above, in the present embodiment, since the hoisting machine 2B having the speed reducer with high reverse efficiency is used, the maintenance worker operates the switch 17B to operate the battery of the automatic landing device during a power failure. By simply switching to 20, the car stopped between floors can be automatically lowered to a predetermined landing. Therefore, the workability of the maintenance worker can be further improved. Further, it is not necessary for a maintenance worker to enter the hoistway 1, and the electromagnetic brake 7 of the hoisting machine 2B can be operated from outside the hoistway 1.
By operating B, the car can be lowered, and the work safety of the maintenance worker is improved.

Embodiment 5 FIG. FIG. 7 is a cross-sectional view showing the configuration of an elevator hoisting machine according to an embodiment of the present invention,
FIG. 8 is a circuit diagram showing a circuit configuration of a brake device for an elevator hoisting machine. In the figure, 1-3, 15, 1
Since 6, 18, and 19 are the same as those in the above-described embodiment, the description thereof will be omitted. 7C is an electromagnetic brake that is attached to the hoisting machine 2B and releases it when it is energized and restrains the hoisting machine when it is deenergized. The brake coil 21 is used to release the electromagnetic brake 7C, and when an abnormality such as a failure occurs in the first system brake coil 21, the second system brake coil 22 is used to release the electromagnetic brake 7B. Is going. Reference numeral 17C is an interlock switch which is installed outside the hoistway 1 and switches between energization of the brake coil 21 of the first system and energization of the brake coil 22 of the second system.

Next, the operation of the brake device for the elevator hoisting machine in this embodiment will be described. When the car stops between floors due to a power failure, the description is omitted because it is the same as the above-described embodiment, and a case where the car stops between floors due to a failure of the electromagnetic brake 7C will be described. In the third and fourth embodiments described above, the electromagnetic brake that stops the car due to a power failure or failure is shared with the electromagnetic brake used in normal operation, and the brake coil itself of the electromagnetic brake is also shared. Therefore, in the present embodiment, the brake coil is a dual system, and the brake coil 21 of the first system is used to release the electromagnetic brake 7C during normal operation.
In the event of a power failure or failure, the second system brake coil 22 is used to release the electromagnetic brake 7C.

Normally, when the electromagnetic brake 7C fails, the brake energizing relay 19 is released and the power supply to the first system brake coil 21 of the electromagnetic brake 7C of the normal power supply 18 is stopped. When the power supply of the normal power source 18 is stopped, the electromagnetic brake 7C in the deenergized state is released by the function of the electromagnetic brake 7C that releases it when energized and restrains the hoist when deenergized. The hoisting machine 2
It becomes impossible to manually operate B. Therefore, the maintenance worker uses the battery connection terminal 16 provided outside the hoistway 1.
The battery 15 is connected to the same, and the switch 17C also installed outside the hoistway 1 causes the brake coil 21 of the first system of the electromagnetic brake 7C to the brake coil 2 of the second system.
The power supply source is switched from the normal power supply 18 to the battery 15 which is an emergency power supply. As a result, the circuit of 15-7C (22) -17C is opened and the electromagnetic brake 7C is released.

At the time of releasing the electromagnetic brake 7C, the hoisting machine 2B in this embodiment uses a speed reducer having a high reverse efficiency. Therefore, only by releasing the electromagnetic brake 7C, the car acts by the gravity acting on the car. Can be gradually lowered naturally. At this time, needless to say, the switch 17 is appropriately changed over to brake the descent of the car as necessary.

As described above, in the present embodiment, since the hoisting machine 2B having the speed reducer with good reverse efficiency is used, the maintenance worker connects the battery 15 which is the emergency power source and the switch to the battery 15. By simply switching, the car stopped between floors can be automatically lowered to a predetermined landing. Therefore, the workability of the maintenance worker in an emergency can be improved. In addition, it is not necessary for a maintenance worker to enter the hoistway 1 and the electromagnetic brake 7C of the hoisting machine 2B can be operated from outside the hoistway 1 to lower the car, which improves the safety of the work of the maintenance worker. improves. Further, by making the first system brake coil 21 during normal operation and the second system brake coil 22 used during emergency operation separate, even when the car is stopped due to a failure of the first system brake coil 21, the lifting and lowering is performed. Interlock switch 1 from outside path 1
The electromagnetic brake 7C can be released by switching 7C.

Further, in the present embodiment, the battery connection terminal 16 is provided outside the hoistway 1 to supply power to the brake coil 22 of the second system, and power is supplied from the battery 15 outside the hoistway 1. As described in the fourth embodiment, the battery 20 of the automatic landing device during power failure may be used.

Embodiment 6 FIG. FIG. 9 is a cross-sectional view showing the configuration of an elevator hoisting machine that is an embodiment of the present invention.
FIG. 10 is a circuit diagram showing a circuit configuration of a brake device for an elevator hoisting machine. In the figure, 1, 3, 7B,
17B and 20 are the same as those in the above-mentioned embodiment, so the description thereof will be omitted. 2C is a hoisting machine using a speed reducer with poor reverse efficiency,
Reference numeral 23 is an emergency stop motor that is provided in the hoisting machine 2C and drops the above-mentioned emergency stopped car when the electromagnetic brake 7B is released by the power from the battery 20 of the automatic flooring device during a power failure. It is a start-up motor,
Since the motor output required for continuing the descent once the car starts to descend is smaller than the motor output required for the descent start, it is sufficient to have only the output required for the car descent start. Reference numeral 24 is a starter switch which is installed outside the hoistway 1 and switches between energization of the electric motor 4 for normal operation and energization of the motor 23 dedicated to emergency descent start.

Normally, at the time of a power outage in an elevator system equipped with an automatic flooring device at the time of power failure, the car is automatically landed at the entrance of the hall by the function of the automatic flooring device. However, in the case of abnormality of the automatic flooring apparatus, abnormality of the system of the elevator apparatus, and abnormality of the electric motor 4 for normal operation mounted on the hoisting machine 2C, similar to the above-described embodiment, the automatic flooring apparatus is operated. Etc. do not function, the brake energizing relay is released, and the supply of the normal power source to the electromagnetic brake 7B is stopped. When the power supply of the normal power supply 18 is stopped, the electromagnetic brake 7B that is released when it is energized and is released when it is energized, and the function of the electromagnetic brake 7B that restrains the hoist when it is deenergized is
B restrains the hoist 2C.

Therefore, the maintenance worker switches the switch 17B installed outside the hoistway 1 to switch the power supply source to the electromagnetic brake 7B from the normal power source to the battery 20 of the automatic landing apparatus at the time of power failure. As a result, the circuit of 20-7B-17B is communicated, the power of the battery 20 of the automatic landing apparatus at the time of power failure is supplied to the electromagnetic brake 7B, and the electromagnetic brake 7B is released. However, in the case of the hoisting machine 2C using a speed reducer with low reverse efficiency, the car is not lowered only by the action of gravity, and the car remains stopped between the floors.
Therefore, the maintenance worker further operates the start switch 24 installed outside the hoistway 1 to switch to the motor 23 dedicated to the emergency descent start in order to lower the car stopped between the floors and energize the car so that the car can be operated in an emergency. The time is lowered by the action of the motor 23 dedicated to the time descent start.

As described above, in the present embodiment, even in the hoisting machine 2C using a speed reducer with poor reverse efficiency, the maintenance worker operates the switch 17B to switch to the battery 20 of the automatic landing device during a power failure. By operating the start-up switch 24, the motor 23 dedicated to the emergency descent start can be operated to easily lower the car stopped between floors to a predetermined landing. Therefore, the workability of the maintenance worker can be further improved. Further, there is no need for a maintenance worker to enter the hoistway 1, and the electromagnetic brake 7B of the hoisting machine 2C can be operated from outside the hoistway 1.
The car can be operated to lower the car, and the safety of the work of the maintenance worker is improved.

In this embodiment, the power source of the motor 23 dedicated to the emergency descent start is used as the power source of the battery 2 of the automatic landing apparatus at the time of power failure.
Although 0 is used, as in the case of the third embodiment described above,
A battery connection terminal 16 is provided outside the hoistway 1
Power may be supplied from the external battery 15. Further, in the above-described embodiment, the motor 2 dedicated for starting under emergency matters
Although 3 is configured to give a starting force for lowering, the car may be lowered from an emergency stopped state by continuously providing a driving force for lowering.

[0048]

Since the present invention is constructed as described above, it has the following effects.

A hoist consisting of an electric motor provided in the hoistway for generating a driving force for raising and lowering the car, and a speed reducer connected to the electric motor and having an automatic tightening property for transmitting the driving force to raise and lower the car. Machine, a brake that acts on the hoisting machine to stop the car in an emergency, a brake release means that forcibly releases the brake, and a handle with a ratchet mechanism that can be detachably attached to rotate the hoisting machine. A nut fixed to the hoist to be fitted,
As a result, the maintenance worker can perform the car descending work after an emergency stop in the hoistway in a safe and comfortable posture, because the car is not lowered by its own weight even if the brake is released. The handle with ratchet mechanism allows the hoist to be easily rotated. Therefore, a maintenance worker can safely and quickly lower the emergency stopped car. Further, the mechanism for rotating the hoisting machine by the external force can be simplified, and the cost can be reduced.

Further, since the manual release arm for holding the brake release means for forcibly releasing the brake in the brake released state is provided, the labor for releasing the brake when lowering the car can be reduced. , Workability is improved.

A hoisting machine comprising an electric motor provided in the hoistway for generating a driving force for raising and lowering the car, and a speed reducer connected to the electric motor for transmitting the driving force to raise and lower the car, Electric power is supplied from a normal power source that drives the electric motor, acts on the hoisting machine, and causes an emergency stop of the car, an electromagnetic brake, and a power supply from the normal power source and a power source from a special power source different from the normal power source. Since a switch provided outside the hoistway for switching between supply and supply is provided, it is possible to release the brake of the elevator hoisting machine in a safe environment outside the hoistway without the risk of interfering with the car, The safety of the maintenance worker is improved, and the electromagnetic brake that stops the car can be released only by the selection switch, which improves the workability.

Furthermore, since the battery of the automatic landing apparatus at the time of power failure is used as the special power source, it is not necessary to newly prepare the special power source, and the workability can be further improved.

Furthermore, since the brake coils of the electromagnetic brake are classified into a plurality of independent systems, the electromagnetic brake can be provided with a backup function, the electromagnetic brake itself can be dealt with, and the electromagnetic brake can be securely confined in the car. It is possible to reliably rescue the victim.

Since the electromagnetic brake is equipped with an emergency stop motor that lowers the emergency stopped car when the electromagnetic brake is opened by electric power from a special power source, it can be applied to any type of speed reducer. In addition to being able to do so, it is possible to reliably rescue the person trapped in the basket.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of an elevator hoisting machine according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a configuration of an elevator hoisting machine that is Embodiment 2 of the present invention.

FIG. 3 is a transverse cross-sectional view showing the configuration of an elevator hoisting machine that is Embodiment 3 of the present invention.

FIG. 4 is a circuit diagram showing a circuit configuration of an elevator hoisting machine.

FIG. 5 is a transverse cross-sectional view showing the configuration of an elevator hoisting machine that is Embodiment 4 of the present invention.

FIG. 6 is a circuit diagram showing a circuit configuration of an elevator hoisting machine.

FIG. 7 is a side view showing the configuration of an elevator hoisting machine that is Embodiment 5 of the present invention.

FIG. 8 is a circuit diagram showing a circuit configuration of an elevator hoisting machine.

FIG. 9 is a side view showing the configuration of an elevator hoisting machine that is Embodiment 6 of the present invention.

FIG. 10 is a circuit diagram showing a circuit configuration of an elevator hoisting machine.

FIG. 11 is an elevational view showing a configuration of a conventional elevator hoistway.

FIG. 12 is a side view showing the structure of a conventional elevator hoistway.

FIG. 13 is a configuration diagram showing a conventional brake release manual winding device for an elevator hoisting machine.

FIG. 14 is an enlarged view of a main part of a conventional brake release manual winding device for an elevator hoisting machine.

FIG. 15 is a transverse cross-sectional view of a conventional brake release manual winding device for an elevator hoisting machine as seen from above the hoistway.

[Explanation of symbols]

1 Hoistway 2A, 2B, 2C Hoisting machine 4 Electric motor 5 Speed reducer 6 Car 7A, 7B, 7C Brake 13 Manual opening arm 14 Manual handle 15 Battery 17A, 17B, 17C Switch 18 Outsource power supply 20 Battery 21 First system brake coil 22 second
System brake coil 23 Motor dedicated for emergency descent start

Claims (6)

[Claims] 1. An electric motor that is provided in a hoistway and that generates a driving force for raising and lowering a car, and is connected to the electric motor.
A hoisting machine consisting of a speed reducer having an automatic tightening property that transmits the driving force to raise and lower the car, a brake that acts on the hoisting machine and stops the car in an emergency, and the brake is forcibly released. A hoist for an elevator, comprising: a brake releasing means for causing the hoist to rotate; and a nut fixed to the hoist to which a handle with a ratchet mechanism is detachably fitted so as to rotate the hoist. Machine. 2. The elevator hoisting machine according to claim 1, wherein the brake releasing means includes a manual releasing arm that holds the brake in a released state. 3. An electric motor which is provided in a hoistway and which generates a driving force for raising and lowering a car, and which is connected to the electric motor.
Electric power is supplied from a hoisting machine including a speed reducer that transmits the driving force to raise and lower the car, and a normal power source that drives the electric motor,
An electromagnetic brake that acts on the hoisting machine to make an emergency stop of the car, power supply from the normal power supply, and power supply from a special power supply different from the normal power supply are provided outside the hoistway. An elevator hoisting machine comprising a switch and. 4. The elevator hoisting machine according to claim 3, wherein the special power source uses a battery of an automatic floor landing device during a power failure. 5. The brake coil of the electromagnetic brake is classified into a plurality of independent systems.
An elevator hoisting machine according to item 4 or 5. 6. An emergency stop motor for lowering the car that has been emergency stopped when the electromagnetic brake is opened by electric power from a special power source.
An elevator hoisting machine according to any one of items 1 to 5.