JP2001226050A - Elevator system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a one-shaft multi-car type elevator with a small minimum distance between cars and less restriction in the interval between the floors of stop stories. SOLUTION: The cars other than a car disposed at the lowest position and the car disposed just below these cars among a plurality of cars are designated as an upper car and a lower car. When the upper car stops by fully compressing a buffer installed in a hoistway on the outside of a projected surface of the lower car, the lower car stopped on the lowest story of the hoistway does not come in contact with the upper car.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber for an elevator, and more particularly to a shock absorber in a so-called one-shaft multi-car type elevator in which a plurality of cars are independently raised and lowered in one hoistway. .

[0002]

2. Description of the Related Art There has been proposed a one-shaft multi-car type elevator for increasing the transportation efficiency of an elevator without increasing the space of a hoistway in a skyscraper. Among the shock absorbers applied to the elevator system of this type, those corresponding to the car arranged below may be installed at the bottom of the hoistway as before. Japanese Unexamined Patent Publication No. 59-153773 discloses a method of arranging a shock absorber corresponding to a car arranged at an upper position, a method of arranging a shock absorber at an upper portion of a lower car and a method of arranging the shock absorber at a lower portion of an upper car. I have.

[0003]

Since the shock absorber of the conventional one-shaft multi-car elevator is constructed as described above, the minimum distance between the cars is limited by the total compression length of the shock absorber. Therefore, in a high-speed elevator requiring a large shock-absorbing stroke, there are problems in particular that a stop floor is restricted, that a hoisting machine needs to be installed at a higher position, and that a pit depth at the bottom of the hoistway needs to be increased. Was. In addition, since a large force is applied to the car when the shock absorber operates, there is a problem that the strength of the car needs to be increased.

[0004] The present invention solves the above-mentioned problems, so that the minimum distance between the cars is not affected by the total compression length of the shock absorber, the stop floor is not restricted, and the upper end of the hoistway is not restricted. And an elevator system that saves space at the bottom. It is another object of the present invention to realize a configuration capable of reducing the strength of the car. An elevator system equipped with a shock absorber that is effective in a zone division operation system in which one hoistway is divided into a plurality of operation zones and a car is assigned to each divided operation zone, and zone division operation is also performed by changing the arrangement of the buffer The aim is to realize an elevator system that can switch between a system and a whole-area operation system.

[0005]

According to the present invention, an elevator system for arranging a plurality of cars that move up and down in a hoistway by independent driving means in one hoistway is provided at a lowest position among the plurality of cars. A basket other than the placed basket,
The lower car stopped on the lowest floor of the hoistway when the car placed immediately below the upper car and the lower car was stopped and the upper car completely stopped the buffer provided in the hoistway outside the projection plane of the lower car. The car and the upper car are configured so as not to contact with each other.

In addition, a car other than the car located at the lowest position among the plurality of cars, and a car arranged immediately below the car are an upper car and a lower car, and the upper car is provided on the hoistway outside the projection plane of the lower car. When the shock absorber is fully compressed and stopped, the lower car and the upper car, which are completely compressed and stopped in the hoistway, do not come into contact with each other.

[0007] Further, of the plurality of cars, a car other than the car arranged at the lowest position, and a car arranged immediately below the upper car and the lower car, and a buffer corresponding to the upper car is set outside the projected area of the lower car. A plurality of cages are arranged at the lower part of the car, and the central axes of the shock absorbers corresponding to the upper car and the lower car correspond to each other.

[0008] Further, of the plurality of cars, a car other than the car arranged at the lowest position, a car arranged immediately below the car, and an upper car and a lower car, and a shock absorber corresponding to the upper car is set outside the projected area of the lower car. Further, a plurality of shock absorbers are arranged below the upper car, and the center axis of the shock absorber corresponding to the upper car and the center axis of the shock absorber corresponding to the lower car are matched.

Further, when the shock absorber corresponding to the upper car is fully compressed and stopped, the upper car and the lower car are not in contact with each other.

In an elevator system in which one hoistway is divided into a plurality of zones in a hoisting direction and at least one car is arranged in one zone, a plurality of shock absorbers are provided at a boundary position of the zone and outside the projected area of the car. Are provided.

A buffer provided at the boundary of the zone and outside the projected area of the car, and means for moving the buffer or the buffer receiving member provided on the car to a position where the car corresponding to the buffer does not collide with the buffer. It is provided with.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, an elevator system to which the present invention is applied will be described with reference to the drawings. In each of the drawings for describing the embodiments of the present invention, the same or corresponding portions are denoted by the same reference characters, without redundant description. FIG. 1 is a schematic diagram showing a configuration of an elevator system according to a first embodiment of the present invention. FIG. 1A shows a state in which the lower car is stopped on the lowest floor where the lower car operates and some abnormality occurs in the upper car. A diagram showing a state approaching the lower car,
(B) is a diagram showing a state in which the upper car is further lowered while compressing the upper car shock absorber, and the upper car shock absorber is fully compressed.

In the figure, 1 is a hoistway, 2 is an upper car, 3 is a lower car, 4 is an upper car buffer arranged in a plurality of points outside the projection plane of the lower car and symmetrical with respect to the center of the upper car. 5
Is a lower car shock absorber arranged at the center of the lower car 3.
Reference numeral 6 denotes a lower beam of the upper car, which also functions as a shock absorber pressing member. 9
Reference numeral denotes an upper car buffer mount which is attached to a hoistway wall and supports the upper car buffer 4. Although the lower car shock absorber 5 is installed at the center of the pit at the bottom of the hoistway, when the operation range of the lower car is limited above the middle floor of the building, the lower car also serves as a shock absorber pressing member. A lower beam similar to the lower beam 6 of the upper car is provided, and a plurality of lower beams are arranged on the lower car shock absorber mounting base provided on the shaft wall so as to be point-symmetric with respect to the center of the lower car 3. In addition, A in (b) shows the lowermost position of the upper car in the state where the lower beam 6 of the upper car fully compressed the upper car shock absorber 4, and B stopped on the lowest floor where the lower car 3 operates. This is the uppermost position of the lower car 3 in the state.

Next, the operation will be described. In normal operation, the two cars are operated at an appropriate interval. Also,
For example, in the case of a rope-type one-shaft multi-car type elevator, when there is an abnormality such as when the rope is broken, the car is decelerated by the emergency stop and the operation control is performed so that the distance of the car running immediately below is always greater than the deceleration distance of the emergency stop Therefore, no collision between cars will occur. In the event that some abnormality occurs in the upper car and the two cars approach beyond the limit while the lower car stops on the lowest floor where the lower car operates, the lower car 6 of the upper car 2 presses the upper car shock absorber 4. The upper car 2 is decelerated at a predetermined deceleration to prevent collision between the cars. Since the lower car 3 and the upper car 4 do not contact each other, the safety of the passengers of the car can be ensured.

In a high-speed elevator, the deceleration distance of the emergency stop is long, and it is difficult to secure a sufficiently long distance between cars in terms of operating efficiency. In some cases, cars may collide with each other. In that case, the upper car 2 descends while being in contact with the lower car 3, and as shown in FIG.
Is compressed and stopped. The lower car 3 stops at the lowest floor level and passengers can move out of the car quickly and safely. Since a plurality of upper car shock absorbers 4 are arranged point-symmetrically with respect to the center of the upper car 2, when the upper car 2 compresses the upper car shock absorber 4, the upper car 2 tilts or the upper car shock absorber 4 tilts. No.

FIG. 2 is a schematic diagram showing the configuration of an elevator system which is a modification of FIG. 2. FIG. 2 (a) shows that the lower car has completely stopped the lower car shock absorber and stopped, and there is some abnormality in the upper car. FIG. 7B is a diagram showing a state in which the upper car is approaching the lower car, and FIG. 7B is a diagram showing a state in which the upper car is further lowered while compressing the upper car shock absorber and the upper car shock absorber is fully compressed.

Next, the operation will be described. It is assumed that the lower car 3 has completely compressed the lower car shock absorber 5 and stopped due to some abnormal operation. In this state, it is also assumed that the upper car has been fully compressed and stopped in the same manner due to abnormal operation. At this time, if there is no gap between the upper car 2 and the lower car 3, the two cars collide and the lower car is fixed by the shock absorber,
The impact force may increase and affect passengers,
Bonito cage damage also occurs. This problem can be solved by disposing the shock absorbers so that the upper car 2 and the lower car 3 do not come into contact with each other as shown in FIG.

Embodiment 2 FIG. FIG. 3 is a schematic view showing the configuration of an elevator system according to a second embodiment of the present invention. FIG. 3A shows a state in which the lower car has stopped and some abnormality has occurred in the upper car, and the lower car is approaching the lower car. FIG. 7B shows a state in which the upper car is further lowered and further lowered while contacting the lower car and compressing the upper car shock absorber, and the upper car shock absorber and the lower car shock absorber are both fully compressed. FIG.

In the drawing, reference numeral 7 denotes a lower beam of a lower car which also serves as a shock absorber pressing member, and an upper car shock absorber 4 has a point on the upper surface of the lower beam of the lower car which is outside the projection plane of the car with respect to the center of the upper car. A plurality are arranged so as to be symmetrical. In addition, lower car shock absorber 5
Is installed in the pit at the bottom of the hoistway,
When the operation range of the lower car is limited above the middle floor of the building, a plurality of cars are arranged on the hoistway wall projection outside the projection plane of the car so as to be point-symmetric with respect to the center of the lower car 3. Of course, when installing the lower car shock absorber 5 in the pit at the bottom of the hoistway,
It may be located at the center of the lower car.

Next, the operation will be described. In normal operation, the two cars are operated at an appropriate interval, but if some abnormality occurs and the two cars approach beyond the limit, the upper car shock absorber 4 is moved to the lower beam 6 of the upper car 2. Presses down and decelerates the upper car 2 at a predetermined deceleration to prevent collision between the cars.

Further, when the upper car 2 approaches the lower car 3 and compresses the upper car shock absorber 4 by the lower beam 6 in a state where the lower car 3 completely compresses the lower car shock absorber 5 and stops, the lower beam 7 Receives an upward reaction force from the lower car shock absorber 5 and a downward reaction force from the upper car shock absorber 4, but the central axes of the lower car shock absorber 5 and the upper car shock absorber 4 coincide with each other. No bending stress occurs. For this reason, the required strength of the lower beam 7 can be reduced, and the moving part weight of the elevator system can be reduced.

The buffer may be installed as shown in FIGS. 4 (a) and 4 (b). That is, the upper car shock absorber 4 is the upper car 3
A plurality of the lower cages 6 are arranged on the lower surface of the lower beam 6 outside the projection plane of the car so as to be point-symmetric with respect to the center of the upper car, and the center axis of the lower car shock absorber 5 is aligned with the center axis of the upper car shock absorber 4. I do.

As shown in FIG. 4, when the two cars fully compress their respective shock absorbers, the shock absorbers are arranged so that the two cars do not come into contact with each other. Collision can be prevented.

In the above description, the safety at the time of lowering the car has been described, but the safety at the time of raising the car can be dealt with similarly. 5A and 5B are schematic diagrams for explaining the operation of the top shock absorber 51 provided at the top of the hoistway. FIG. 5A shows a state in which the lower car 3 has some abnormality while the upper car 2 is stopped on the highest floor where the car operates. FIG. 6B shows a state in which the lower car 3 is further raised and is approaching the upper car 2, and FIG.
FIG. 7 is a view showing a state in which the top shock absorber 51 is fully compressed by the upper beam 8 also serving as a pressing member. With this configuration,
The lower car 3 does not collide with the top of the hoistway by pushing up the upper car 2, so that the safety of the lower car 3 can be secured.

Embodiment 3 FIG. 6 is a schematic diagram showing the configuration of an elevator system according to a second embodiment of the present invention. In the case where the hoistway is divided into two upper and lower sections and one car is arranged for each operation zone (hereinafter, referred to as “ Zone Division Operation "
). The object of the present invention is not limited to two operation zones. Further, the number of cars arranged in each operation zone is not limited to one. (A) is an explanatory view of an operation zone in which the hoistway is divided, (b) is a diagram showing the arrangement of shock absorbers arranged at the boundary positions of the operation zones, and (c) is a diagram illustrating both shock absorbers due to abnormal operation of the upper and lower cars. FIG. 6 is a view showing a state where the vessel is fully compressed. Reference numeral L denotes an upper operation zone, and M denotes a lower operation zone.

In the drawing, reference numeral 2 denotes an upper car for elevating and lowering the upper operation zone, 3 denotes a lower car for elevating and lowering the lower operation zone, and 9 denotes a shock absorber mount for mounting the shock absorber on a hoistway wall at the boundary of the operation zone. , 52 are segmented shock absorbers arranged outside the projection plane of the car and mounted on the shock absorber mount to limit the lower car from rising above the zone boundary position. With the above-described configuration, even if the upper car 2 or the lower car 3 abnormally approaches the operation zone boundary due to some abnormality, the deceleration is stopped safely and reliably by the shock absorber installed at the operation zone boundary. The safety of zone operation can be secured.

In the above description, one car is arranged in each of the upper and lower operation zones for zone division operation. However, when a plurality of cars are arranged in one operation zone, FIGS. The configuration described with reference to FIG. Further, one hoistway may be divided into three or more operation zones.

Embodiment 4 FIG. 7 is a schematic diagram showing the configuration of an elevator system according to a fourth embodiment of the present invention, in which each car operates in the entire area of the hoistway, and the operation zone of the upper car 2 is denoted by reference numeral N. Denotes the operation zone of the lower car 2 with a reference symbol P, and is configured to be switchable to a zone division operation in which the hoistway is divided into a plurality of zones. The operation when the hoistway is divided is the same as that in FIG. 6A, and the arrangement of the shock absorber and the operation are the same as those described for the zone division operation. Therefore, each car operates in the entire area of the hoistway. The operation in the case (hereinafter, referred to as “all-area operation”) will be described. In this case, there is provided a means for moving a relative position between the shock absorber disposed in the middle of the hoistway and the shock absorber pressing means of each car. Switching between the zone division operation and the whole area operation is performed according to the traffic demand.

FIG. 8 shows relative position moving means between a shock absorber (hereinafter referred to as an "intermediately installed shock absorber") provided on the way in the hoistway and a shock absorber pressing means of the car. The provided shock absorber pressing means has a rotation mechanism.In the case of zone division operation, the shock absorber pressing means is fixed at a position where it collides with the intermediately installed shock absorber. It is designed to be fixed at a position that does not interfere with the container. (A) is a car front view, (b) and (c) are car bottom views, (b) is a case of zone division operation,
(C) shows the case of the whole area operation. The shock absorber pressing member 10 is attached to the lower beam of the car via the rotation mechanism 11.
The rotation mechanism 11 is operated to change the fixing position of the shock absorber pressing member 10 according to the operation method.

FIG. 9 shows a case in which the intermediate installation shock absorber is provided with a moving means, (a) is a front view of the shock absorber moving means,
(B) and (c) are car bottom views, (b) shows a case of zone division operation, and (c) shows a case of full area operation. The shock absorber moving means for mounting the intermediate installation shock absorber includes a movable shock absorber stand 20, a fixed shock absorber stand 21, a pinion 22 attached to the movable shock absorber stand, and a rack 2 attached to the fixed shock absorber stand.
The position of the intermediate buffer is changed according to the operation method. The shock absorber pressing member 10 is fixed to the lower beam of the car.

[0031]

According to the present invention, an elevator system for arranging a plurality of cars to be moved up and down in a hoistway by independent driving means in one hoistway is provided.
When a car other than the car located at the lowest position and the car immediately below it are taken as the upper car and the lower car, and the upper car completely stops the shock absorber provided in the hoistway outside the projection plane of the lower car and stops Since the lower car and the upper car stopped at the lowest floor of the hoistway do not come into contact with each other, some abnormalities occur in the upper car when the lower car stops at the lowest floor where the lower car operates and the two cars When the vehicle approaches beyond the limit, the lower beam of the upper car presses the upper car shock absorber to decelerate the upper car at a predetermined deceleration to prevent collision between the cars. Since the lower car and the upper car do not touch each other, the safety of the passengers of the car can be ensured.

Further, of the plurality of cars, a car other than the car arranged at the lowest position, and a car arranged immediately below the car are an upper car and a lower car, and the upper car is provided on the hoistway outside the projection plane of the lower car. When the shock absorber is fully compressed and stopped, the lower car and the upper car that have been completely compressed and stopped in the hoistway do not come in contact with each other, so that the lower car is buffered due to some abnormal operation. When the upper car is stopped by fully compressing the shock absorber due to abnormal operation, the upper car 2 and the lower car 3 are similarly stopped.
Since the two shock absorbers are arranged in a positional relationship such that the lower car and the upper car are not in contact with each other, the safety of the passengers of the car can be ensured.

Further, of the plurality of cars, a car other than the car arranged at the lowest position, a car arranged immediately below the car, and an upper car and a lower car, and a shock absorber corresponding to the upper car is set outside the projected area of the lower car. The upper car shock absorber is located at a point with respect to the center of the upper car because the center axis of the shock absorber corresponding to the upper car and the center axis of the shock absorber corresponding to the lower car coincide with each other. When the upper car compresses the upper car shock absorber, the upper car does not incline or the upper car shock absorber does not incline when the upper car compresses the upper car shock absorber. Also, the required strength of the lower beam can be reduced, and the weight of the moving part of the elevator system can be reduced.

In the plurality of cars, a car other than the car arranged at the lowest position, the car arranged immediately below the upper car and the lower car are moved, and the shock absorber corresponding to the upper car is moved outside the projected area of the lower car. In addition, since the central axis of the shock absorber corresponding to the upper car and the central axis of the shock absorber corresponding to the lower car are aligned with each other at the lower part of the upper car, the required strength of the lower beam can be reduced. The moving part weight of the elevator system can be reduced.

Further, when the shock absorber corresponding to the upper car is fully compressed and stopped, the upper car and the lower car are not in contact with each other. Can be secured.

Further, in an elevator system in which one hoistway is divided into a plurality of zones in the elevating direction and at least one car is arranged in one zone, a plurality of buffers are provided at the boundary position of the zone and outside the projected area of the car. Even if the upper car 2 or the lower car 3 abnormally approaches the border of the operation zone due to some abnormality, the buffer installed at the border of the operation zone can decelerate and stop safely and surely and stop. Safety can be ensured.

A buffer provided at the boundary of the zone and outside the projected area of the car, and means for moving the buffer or the buffer receiving member provided on the car to a position where the car corresponding to the buffer does not collide with the buffer. Therefore, even if the upper car 2 or the lower car 3 abnormally approaches the operation zone boundary due to some abnormality, the buffer installed at the boundary of the operation zone can decelerate and stop safely and surely and stop. Safety can be ensured.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an elevator system according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing a modification of the elevator system shown in FIG.

FIG. 3 is a schematic diagram showing an elevator system according to a second embodiment of the present invention.

FIG. 4 is a schematic diagram showing a first modification of the elevator system shown in FIG. 3;

FIG. 5 is a schematic diagram showing a second modification of the elevator system shown in FIG. 3;

FIG. 6 is a schematic diagram showing an elevator system according to a third embodiment of the present invention.

FIG. 7 is a schematic diagram showing an elevator system according to a fourth embodiment of the present invention.

FIG. 8 is a schematic diagram for explaining switching between operation and non-operation of the intermediately installed shock absorber in the elevator system shown in FIG. 7;

FIG. 9 is a schematic view showing a modification of the mechanism shown in FIG. 7;

[Explanation of symbols]

1 ‥ hoistway, 2 ‥ upper car, 3 ‥ lower car, 4 ‥ shock absorber, 5 ‥ shock absorber

Claims (7)

[Claims] 1. An elevator system in which a plurality of cars that move up and down the hoistway by independent driving means are arranged in one hoistway, respectively. When the upper car is fully compressed and stopped in the hoistway provided in the hoistway outside the projection plane of the lower car, the car located immediately below the hoistway is stopped. An elevator system characterized in that the lower car and the upper car stopped on the lower floor do not come into contact with each other. 2. An elevator system in which a plurality of cars that move up and down in the hoistway by independent driving means are arranged in one hoistway, and wherein the plurality of cars are other than the car arranged at the lowest position among the plurality of cars. , The upper car and the lower car are arranged immediately below the upper car, and when the upper car completely stops the buffer provided in the hoistway outside the projection plane of the lower car and stops, the inside of the hoistway An elevator system characterized in that the lower car and the upper car, which have been stopped by fully compressing the installed shock absorber, do not come into contact with each other. 3. An elevator system in which a plurality of cars which move up and down the hoistway by independent driving means are arranged in one hoistway, respectively, wherein the other one of the plurality of cars is a car other than a car arranged at a lowest position. , The car arranged immediately below the upper car and the lower car, a plurality of shock absorbers corresponding to the upper car are arranged outside the projected area of the lower car and at the lower part of the car, and correspond to the upper car. An elevator system, wherein a center axis of the shock absorber and a center axis of the shock absorber corresponding to the lower car are made to coincide with each other. 4. An elevator system in which a plurality of cars which move up and down the hoistway by independent driving means are arranged in one hoistway, respectively, wherein the car other than the car arranged at the lowest position is selected from the plurality of cars. The upper car and the lower car are arranged under the upper car, and a plurality of shock absorbers corresponding to the upper car are arranged outside the projected area of the lower car and at the lower part of the upper car, corresponding to the upper car. An elevator system, wherein a central axis of a shock absorber corresponding to the lower car corresponds to a central axis of the shock absorber corresponding to the lower car. 5. The elevator according to claim 3, wherein the upper car and the lower car are not in contact with each other when the shock absorber corresponding to the upper car is fully compressed and stopped. system. 6. An elevator system in which one hoistway is divided into a plurality of zones in a hoisting direction and at least one car is arranged in one zone, wherein a buffer is provided at a boundary position of the zone and outside a projected area of the car. An elevator system comprising a plurality of containers. 7. An elevator system in which one hoistway is divided into a plurality of zones in the elevating direction and at least one car is arranged in one zone, wherein the elevator system is provided at a boundary position of the zone and outside the projected area of the car. An elevator system comprising: a shock absorber; and a car corresponding to the shock absorber, a means for moving the shock absorber or a shock absorber receiving member provided on the car to a position where collision does not occur.