JP4284810B2 - Elevator system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevator shock absorber, and more particularly to a shock absorber in a so-called one-shaft multi-car elevator in which a plurality of cars are lifted and lowered independently in one hoistway.
[0002]
[Prior art]
One-shaft multi-car elevators have been proposed to increase elevator transportation efficiency without increasing hoistway space in high-rise buildings.
What is necessary is just to install in the bottom part of a hoistway as usual about the thing corresponding to the car arrange | positioned below among the shock absorbers applied to the elevator system of this system. Japanese Patent Application Laid-Open No. 59-153773 describes a method of arranging a shock absorber corresponding to an upper car and a shock absorber arranged at the upper part of the lower car and that arranged at the lower part of the upper car. Yes.
[0003]
[Problems to be solved by the invention]
Since the shock absorber of the conventional one-shaft multi-car type elevator is configured as described above, the minimum distance between the cars is limited by the total compression length of the shock absorber. Therefore, high-speed elevators that require a large cushioning stroke have problems such as restrictions on the stop floor, the need to increase the hoisting machine installation position, or the need to increase the pit depth at the bottom of the hoistway. It was. There is also a problem that the strength of the car needs to be increased because a large force is applied to the car during operation of the shock absorber.
[0004]
The present invention eliminates the above-mentioned problems, eliminates the minimum distance between the cages from being affected by the total compression length of the shock absorber, does not cause a restriction on the stop floor, and prevents the top and bottom of the hoistway from being restricted. The purpose is to realize an elevator system that can save space. Moreover, it aims at realization of the structure which can reduce the intensity | strength of a cage | basket | car.
[0005]
[Means for Solving the Problems]
An elevator system that arranges a plurality of cars that are moved up and down in a hoistway by independent driving means in one hoistway according to the present invention includes a car other than a car arranged at the lowest position among the plurality of cars, immediately below the car. The upper car and the lower car are arranged in the upper car and the lower car is stopped on the lowest floor of the hoistway when the shock absorber provided in the hoistway outside the projection plane of the lower car is fully compressed and stopped. The upper cage is configured not to contact.
[0006]
Also, among the multiple cars, a car other than the car placed at the lowest position, the car placed immediately below the upper car and the lower car, and a shock absorber provided on the hoistway outside the projection plane of the lower car When fully compressed and stopped, the shock absorber installed in the hoistway is configured such that the lower car and the upper car that are fully compressed and stopped do not come into contact.
[0007]
Also, out of the multiple cars, the car other than the car placed at the lowest position, the car placed directly under it, the upper car and the lower car, and the shock absorber corresponding to the upper car outside the projected area of the lower car A plurality of dampers are arranged in the lower part, and the central axis of the shock absorber corresponding to the upper car is matched with the central axis of the shock absorber corresponding to the lower car.
[0008]
Also, of the cars other than the car placed at the lowest position, the car placed immediately below the upper car and the lower car, and the shock absorber corresponding to the upper car outside the projected area of the lower car and the upper car The central axis of the shock absorber corresponding to the upper car is aligned with the central axis of the shock absorber corresponding to the lower car.
[0009]
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.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
Hereinafter, an elevator system to which the present invention is applied will be described with reference to the drawings. In the drawings for explaining the embodiments of the present invention, the same or corresponding parts are denoted by the same reference numerals, and overlapping description will not be given.
FIG. 1 is a schematic diagram showing the configuration of the elevator system according to the first embodiment of the present invention. (A) is stopped at the lowest floor where the lower car operates, and some abnormality occurs in the upper car. The figure which shows the state which has approached the lower cage | basket, (b) is a figure which shows the state which further descend | falls while the upper cage | basket | car compressed the upper cage | basket | ball damper, and fully compressed the upper cage | basket buffer.
[0013]
In the figure, 1 is a hoistway, 2 is an upper car, 3 is a lower car, 4 is an upper car shock absorber arranged in a point-symmetric manner with respect to the center of the upper car outside the projection surface of the lower car, and 5 is a lower part A lower car shock absorber disposed at the center of the car 3. 6 is a lower beam of the upper car, which also serves as a shock absorber pressing member. Reference numeral 9 denotes an upper car shock absorber mounting base that supports the upper car shock absorber 4 attached to the hoistway wall. The case where the lower car shock absorber 5 is installed at the center of the pit at the bottom of the hoistway is shown. However, when the operation range of the lower car is limited to a level above the middle floor of the building, the lower car also serves as a shock absorber pressing member. A plurality of lower beams similar to the lower beam 6 of the upper car are provided, and a plurality of them are arranged on the lower car shock absorber mounting provided on the hoistway wall so as to be point-symmetric with respect to the center of the lower car 3. In addition, A in (b) shows the lowest position of the upper car when the lower beam 6 of the upper car fully compresses the upper car shock absorber 4, and B stops at the lowest floor where the lower car 3 operates. This is the uppermost position of the lower car 3 in the state.
[0014]
Next, the operation will be described.
In normal operation, the two cars are operated at moderate intervals. For example, in the case of a rope-type one-shaft multi-car elevator, when the rope breaks, the car is decelerated by the emergency stop and the distance to travel underneath is always greater than the emergency stop deceleration distance. Since the operation is controlled, there is no collision between the cars. If an abnormality occurs in the upper car while the lower car is stopped at the lowest floor where the lower car operates, and the two cars approach beyond the limit, 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 the cars from colliding with each other. Since the lower car 3 and the upper car 4 are not in contact with each other, the safety of passengers in the car can be ensured.
[0015]
In high-speed elevators, the emergency stop deceleration distance becomes longer, and it is difficult to secure a sufficiently long distance between the cars in terms of operation efficiency. May collide. In this case, the upper car 2 is lowered while being in contact with the lower car 3, and the upper car shock absorber 4 is fully compressed and stopped as shown in FIG. 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 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 shock absorber 2 or the upper car shock absorber 4 is inclined. There is nothing to do.
[0016]
FIG. 2 is a schematic diagram showing the configuration of an elevator system which is a modification of FIG. 2, and (a) shows that the lower car is fully compressed by the lower car shock absorber and stopped, and the upper car has some abnormalities. The figure which shows the state which has approached the cage | basket, (b) is a figure which shows the state which further descend | falls while the upper cage | basket | car compresses the upper cage | basket | car buffer, and fully compressed the upper cage | basket buffer.
[0017]
Next, the operation will be described.
It is assumed that the lower car 3 is fully compressed by the lower car shock absorber 5 and stopped due to some abnormal operation. In this state, it is assumed that the upper car is also fully compressed and stopped due to abnormal operation. If there is no gap between the upper car 2 and the lower car 3 at this time, the two cars will collide and the lower car will be fixed by the shock absorber, so the impact force will increase and may affect the passengers. Damage to the casket also occurs.
This problem can be solved by arranging the shock absorbers in such a positional relationship that the upper car 2 and the lower car 3 do not contact each other as shown in FIG.
[0018]
Embodiment 2. FIG.
FIG. 3 is a schematic diagram showing the configuration of an elevator system according to the second embodiment of the present invention. FIG. 3 (a) shows that the lower car is stopped and some abnormality occurs in the upper car and approaches the lower car. FIG. 5B shows a state in which the upper car further descends, comes into contact with the lower car and further lowers while compressing the upper car shock absorber, and both the upper car shock absorber and the lower car shock absorber are fully compressed. FIG.
[0019]
In the figure, reference numeral 7 denotes a lower beam of the lower car, which also serves as a shock absorber pressing member, and the upper car shock absorber 4 is point-symmetric with respect to the center of the upper car outside the projection surface of the car on the upper beam of the lower car. A plurality are arranged. In addition, although the case where the lower car shock absorber 5 is installed in the pit at the bottom of the hoistway is shown, when the operating range of the lower car is limited above the middle floor of the building, the hoistway wall protrusion outside the car projection plane A plurality of them are arranged symmetrically 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 arranged at the center of the lower car.
[0020]
Next, the operation will be described.
In normal operation, the two cars are operated at an appropriate interval. However, if some abnormality occurs and the two cars are approaching beyond the limit, the upper car shock absorber 4 is connected to the lower beam 6 of the upper car 2. Is pressed to decelerate the upper car 2 at a predetermined deceleration to prevent the cars from colliding with each other.
[0021]
Further, when the upper car 2 approaches the lower car 3 and compresses the upper car shock absorber 4 by the lower beam 6 with the lower car 3 fully stopped after the lower car shock absorber 5 is stopped, the lower beam 7 is moved to the lower car 7. The upward reaction force from the shock absorber 5 and the downward reaction force from the upper car shock absorber 4 are received, but the central axes of the lower car shock absorber 5 and the upper car shock absorber 4 coincide with each other, and the bending stress due to the shock absorber reaction force Does not occur. 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.
[0022]
The shock absorbers may be installed as shown in FIGS. 4 (a) and 4 (b). That is, a plurality of upper car shock absorbers 4 are arranged on the lower surface of the lower beam 6 of the upper car 3 so as to be point-symmetric with respect to the center of the upper car outside the projection surface of the car, and the central axis of the lower car shock absorber 5 is the upper car It is installed so as to coincide with the central axis of the shock absorber 4.
[0023]
As shown in FIG. 4, when the two cars fully compress the respective shock absorbers, the shock absorbers are arranged so that the two cars do not come into contact with each other. Can be prevented.
[0024]
In the above description, the safety when the car is lowered has been described. However, the safety when the car is raised can be similarly dealt with. FIG. 5 is a schematic diagram for explaining the operation of the top shock absorber 51 provided at the top of the hoistway. FIG. 5A is the highest floor where the upper car 2 operates, and there is some abnormality in the lower car 3 while it is stopped. The figure which shows the state which arises and is approaching the upper cage | basket | car 2, (b) is the state which the lower cage | basket | car 3 further raised and the top shock absorber 51 was fully compressed by the upper beam 8 which served as the pressing member of the top shock absorber 51. FIG.
If comprised in this way, the lower cage | basket | car 3 will not collide with a hoistway top part by pushing up the upper cage | basket | car 2, and the safety | security of the lower cage | basket | car 3 can be ensured.
[0025]
Embodiment 3 FIG.
FIG. 6 is a schematic diagram showing the configuration of an elevator system according to the second embodiment of the present invention. In the case where the hoistway is divided into two vertically and one cage is arranged for each operation zone (hereinafter, “ This is called “zone division operation”. The object of the present invention is not limited to two operation zones. Further, the number of cars arranged in each service zone is not limited to one.
(A) is explanatory drawing of the operation zone which divided | segmented the hoistway, (b) is a figure which shows arrangement | positioning of the buffer arrange | positioned in the boundary position of each operation zone, (c) is both buffer by abnormal operation | movement of an upper and lower cage | basket | car. It is a figure which shows the state which the container fully compressed. Reference symbol L indicates the upper operation zone and M indicates the lower operation zone.
[0026]
In the figure, 2 is an upper car for raising and lowering the upper operation zone, 3 is a lower car for raising and lowering the lower operation zone, 9 is a shock absorber mounting base for supporting a shock absorber attached to the hoistway wall at the operation zone boundary position, and 52 It is restricted that the lower car rises from the boundary position of the zone with a section shock absorber that is arranged outside the projection surface of the car and attached to the shock absorber mounting base.
By configuring as described above, even if the upper car 2 or the lower car 3 abnormally approaches the operation zone boundary due to some abnormality, the vehicle can be decelerated and stopped safely and reliably by the shock absorber installed at the operation zone boundary. Can ensure the safety of zone operation.
[0027]
In the above description, a single 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. 1 to 4 are used for each operation zone. The configuration described above may be used. One hoistway may be divided into three or more operation zones.
[0028]
Embodiment 4 FIG.
FIG. 7 is a schematic diagram showing the configuration of an elevator system according to the fourth embodiment of the present invention, in which each car operates in the entire region of the hoistway, and the operation zone of the upper car 2 is denoted by reference numeral N. , The operation zone of the lower car 2 is indicated by the symbol P, and is configured to be switchable to zone division operation in which the hoistway is divided into a plurality of zones. The operation in the case of dividing the hoistway is the same as that of FIG. 6A, and the arrangement of the shock absorber and the operation thereof are the same as those described for the zone division operation. Therefore, each car operates in the entire region of the hoistway. The operation in the case (hereinafter referred to as “global operation”) will be described. In this case, there is provided means for moving the relative position between the shock absorber disposed in the middle of the hoistway and the shock absorber pressing means of each car. Switching between zone division operation and whole area operation is performed according to traffic demand.
[0029]
FIG. 8 shows a relative position moving means between a shock absorber provided on the way of the hoistway (hereinafter referred to as “intermediate shock absorber”) and a shock absorber pressing means of the car. In the case of zone division operation, the shock absorber pressing means is fixed at a position where it collides with the intermediate shock absorber, and in the case of full-range operation, the shock absorber pressing means interferes with the intermediate shock absorber. It is designed to be fixed at the position where it is not. (A) is a car front view, (b) and (c) are car bottom views, (b) shows the case of zone division operation, and (c) shows the case of whole area operation. The shock absorber pressing member 10 is attached to the car lower beam via the rotation mechanism 11. The rotation mechanism 11 is operated to change the fixed position of the shock absorber pressing member 10 according to the operation method.
[0030]
FIG. 9 shows a case where a moving means is provided in the intermediate shock absorber, (a) is a front view of the shock absorber moving means, (b) and (c) are bottom views of the car, and (b) is a zone division. In the case of operation, (c) shows the case of whole area operation. The shock absorber moving means for attaching the intermediate shock absorber is composed of a movable shock absorber base 20, a fixed shock absorber base 21, a pinion 22 attached to the movable shock absorber base, and a rack 23 attached to the fixed shock absorber base. Change the position of the intermediate shock absorber. The shock absorber pressing member 10 is fixed to the car lower beam.
[0031]
【The invention's effect】
An elevator system that arranges a plurality of cars that are moved up and down in a hoistway by independent driving means in one hoistway according to the present invention includes a car other than a car arranged at the lowest position among the plurality of cars, immediately below the car. The upper car and the lower car are arranged in the upper car and the lower car is stopped on the lowest floor of the hoistway when the shock absorber provided in the hoistway outside the projection plane of the lower car is fully compressed and stopped. Since the upper car is not in contact with the upper car, if there is something wrong with the upper car and the two cars are approaching beyond the limit while stopped on the lowest floor where the lower car operates, the upper car buffer Is pushed by the lower beam of the upper car, and the upper car is decelerated at a predetermined deceleration to prevent the cars from colliding with each other. Since the lower car and the upper car do not touch each other, safety of passengers in the car can be ensured.
[0032]
Also, among the multiple cars, a car other than the car placed at the lowest position, the car placed immediately below the upper car and the lower car, and a shock absorber provided on the hoistway outside the projection plane of the lower car Since the shock absorber installed in the hoistway is configured so that the lower car and the upper car that are stopped after full compression do not come into contact with each other when the full car is stopped. In this state, when the upper car is similarly compressed and stopped due to abnormal operation, the upper car 2 and the lower car 3 are positioned so that the upper car 2 and the lower car 3 are not in contact with each other. Therefore, the safety of passengers in the car can be ensured because the lower car and the upper car do not touch.
[0033]
Also, out of the multiple cars, the car other than the car placed at the lowest position, the car placed directly under it, the upper car and the lower car, and the shock absorber corresponding to the upper car outside the projected area of the lower car A plurality of lower car shock absorbers corresponding to the upper car are aligned with the central axis of the shock absorber corresponding to the lower car. Since the upper car shock absorber compresses the upper car shock absorber, the upper car shock absorber and the upper car shock absorber do not lean. In addition, the required strength of the lower beam can be reduced and the moving part weight of the elevator system can be reduced.
[0034]
Also, of the cars other than the car placed at the lowest position, the car placed immediately below the upper car and the lower car, and the shock absorber corresponding to the upper car outside the projected area of the lower car and the upper car Since the central axis of the shock absorber corresponding to the upper car is aligned with the central axis of the shock absorber corresponding to the lower car, it is possible to reduce the required strength of the lower beam. The moving part weight can be reduced.
[0035]
In addition, 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. Therefore, the lower car and the upper car are not in contact with each other, so the safety of passengers in the car 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.
FIG. 5 is a schematic diagram showing a second modification of the elevator system shown in FIG.
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 the operation non-operation switching of the intermediate shock absorber in the elevator system shown in FIG.
FIG. 9 is a schematic diagram showing a modification of the mechanism shown in FIG.
[Explanation of symbols]
1 ... hoistway, 2 ... upper cage, 3 ... lower cage, 4 ... shock absorber, 5 ... shock absorber

Claims (5)

 In an elevator system in which a plurality of cars that are moved up and down in the hoistway by independent driving means are arranged in one hoistway, a car other than the car arranged at the lowest position among the plurality of cars, immediately below it The upper car and the lower car are arranged, and the upper car is fully compressed and stopped in the middle of the hoistway outside the projection surface of the lower car so that the lower car is not obstructed. The elevator system is configured so that the lower car and the upper car that are stopped at the lowest floor on which the lower car of the hoistway is operated are not in contact with each other.  In an elevator system in which a plurality of cars that are moved up and down in the hoistway by independent driving means are arranged in one hoistway, a car other than the car arranged at the lowest position among the plurality of cars, immediately below it The upper car and the lower car are arranged, and the upper car is fully compressed and stopped in the middle of the hoistway outside the projection surface of the lower car so that the lower car is not obstructed. The elevator system is configured such that when the shock absorber installed in the hoistway is fully compressed and stopped, the lower car and the upper car do not come into contact with each other.  In an elevator system in which a plurality of cars that are moved up and down in the hoistway by independent driving means are arranged in one hoistway, a car other than the car arranged at the lowest position among the plurality of cars, immediately below it The upper car and the lower car are arranged, and a plurality of shock absorbers corresponding to the upper car are arranged on the upper surface of the pressing member provided outside the projected area of the lower car and at the lower part of the lower car. An elevator system characterized in that a central axis of a corresponding shock absorber coincides with a central axis of a shock absorber corresponding to the lower car.  In an elevator system in which a plurality of cars that are moved up and down in the hoistway by independent driving means are arranged in one hoistway, a car other than the car arranged at the lowest position among the plurality of cars, immediately below it The upper car and the lower car are arranged, and a plurality of shock absorbers corresponding to the upper car are arranged on the lower surface of the pressing member provided outside the projected area of the lower car and at the lower part of the upper car. An elevator system characterized in that a central axis of a shock absorber corresponding to the above and a central axis of a shock absorber corresponding to the lower car are matched.  5. The elevator system according to claim 3, wherein 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. .

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