JP6703352B2 - Elevator equipped with a belt that moves around the door - Google Patents

Description

The present invention relates to an elevator.

The elevator includes a hoistway that extends vertically and a car that is movably provided in the hoistway. The structure defining the hoistway includes multiple floors, and the structure has at least multiple landings. Recent modes of using an elevator include a mode in which a user not only uses the elevator alone but also uses the elevator together with a pet.

However, when using the elevator with a pet, the pet may suddenly get in and out of the car by itself, and the user who is the owner and the pet are separated into a car and a landing. , In that state, it cannot be denied that the door will be closed and the car will go up and down. In such a situation, since the lead of the pet remains sandwiched between the doors, a pulling force may be temporarily applied to both the pet and the user. Therefore, how to prevent such a situation is becoming important.

Patent Document 1 discloses a safety device including a pair of contact plates corresponding to a pair of elevator doors, and a spring that supports the contact plates in such a manner that the contact plates themselves can move up and down to some extent. It is disclosed. In this device, when a car starts running while a thin object such as a string is sandwiched between doors, the pair of contact plates themselves move in the corresponding directions up and down, and the switches are operated to release the sandwiched state. It was designed to detect and bring the car to an emergency stop.

JP, 2009-29552, A

In the contact plate type device capable of vertically moving by elastic support as disclosed in Patent Document 1, there is a possibility that the contact plate may vertically vibrate due to the influence of inertia generated when the car starts to move up and down. Therefore, there is a problem that it is difficult to improve the detection accuracy. Also, if a spring with a large (hard) spring constant is used to reduce this effect, then the high elastic reaction force may increase the pulling force acting on the pet via the lead. ..

The present invention has been made in view of the above, and an object of the present invention is to provide an elevator that has a high pet protection function and can improve the detection accuracy of occurrence of trapping.

In order to achieve the above-mentioned object, the present invention provides a car movably provided in a hoistway, at least one door openably and closably provided in the car or the landing, and a door that abuts the door when fully closed. An elevator equipped with a hit object, the front end portion in the door closing direction of the door is provided with a belt circling mechanism, the belt circling mechanism, a pair of upper and lower wheels separated in the car lifting direction, and a first belt that is passed over across their pair of wheels, said first belts, try along the rotation axis direction of the wheel, that having a periphery of irregularities.

ADVANTAGE OF THE INVENTION According to the elevator of this invention, a pet's protection effect is high and the detection precision of the occurrence of entrapment can be improved.

It is a figure explaining the outline of the elevator of Embodiment 1 of the present invention. It is a figure explaining the opening/closing mechanism of the door of the elevator of FIG. It is a figure which shows a door from a boarding/alighting direction so that the characteristic of this invention may appear. It is a figure which shows a door top view so that the characteristic of this invention may appear.

Embodiments of an elevator according to the present invention will be described below with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

Embodiment 1.
FIG. 1 is a diagram illustrating an outline of an elevator according to the first embodiment of the present invention. FIG. 2 is a diagram illustrating an opening/closing mechanism of a door of the elevator shown in FIG. FIG. 3 is a diagram showing the door from the entry/exit direction so that the features of the present invention appear. FIG. 4 is a plan view of the door so that the features of the present invention can be seen.

The elevator includes a car 3 that is movable in the hoistway 1, at least one door that can be opened and closed in the car 3 or the landing 5, and a door-stop target that collides with the door when fully closed as described later. It has and.

The hoistway 1 is a space passage that extends in the vertical direction, that is, the height direction of a building including a plurality of floors and extends through the plurality of floors. The car 3 is suspended in a known manner and is lifted and lowered by a hoist (not shown).

A car door 7 is provided on the hall 5 side of the car 3 so as to be opened and closed. Corresponding to this, a hall door 9 is provided on each hoistway 1 side of the hall 5 so as to be openable and closable.

As shown in the example of FIG. 2, the car door 7 and the hall door 9 are usually hooked and hung on corresponding door rails 11 extending in the opening/closing direction. Further, the opening/closing operation of each of the car door 7 and the hall door 9 is performed by the operation of the corresponding door opening/closing belt 13. The door opening/closing belt 13 is wound around a pair of pulleys separated in the opening/closing direction. Corresponding car doors 7 and landing doors 9 are connected to the door opening/closing belts 13, and the corresponding car doors 7 and landing doors 9 are opened/closed by driving the door opening/closing belts 13 to rotate. The support mechanism and the opening/closing mechanism of the car door 7 and the hall door 9 and their operations are known aspects. Further, FIG. 2 is a view showing the surfaces that are actually facing substantially parallel to each other with a large angle and opened to show the opening/closing mechanism of the door.

In the present invention, the belt wrapping mechanism is provided at the front end of the car door or the hall door in the door closing direction. In the first embodiment, one of a pair of double-opening type car doors 7 is provided with the belt circling mechanism 15, and the pair of car doors 7 is provided as a door-stop target that abuts the car door 7 provided with the door opening/closing belt 13. A fixed side bar 17 is provided on the other side of the door 7.

The belt winding mechanism 15 includes a pair of upper and lower wheels 19 that are separated from each other in the car up-and-down direction, and a detection belt 21 (first belt) that spans the pair of wheels 19.

The detection belt 21 may be made of rubber, for example. Further, in the present invention, it is preferable that the outer peripheral surface of the detection belt can obtain a surface state that has a function of being caught or having a large frictional force with respect to a foreign substance described later. As an example, in the first embodiment, as the detection belt 21, a toothed (with protrusion) belt having an outer peripheral surface where irregularities are repeated is used. More specifically, the detection belt 21 has an outer peripheral surface on which an uneven shape can be confirmed when viewed along the rotation axis direction of the wheel 19 (the front and back direction of the paper surface of FIG. 3, that is, the getting on and off direction). In another way, the irregularities on the outer peripheral surface of the detection belt 21 are such that concave portions and convex portions are repeatedly arranged at least in the front-back direction of the belt circulation.

The elevator also includes a pair of rotation sensors 23 and a control device 25. Each of the pair of rotation sensors 23 detects the rotation amount of the corresponding wheel 19. The rotation sensor 23 is, for example, a pulse encoder or a tilt angle sensor.

The car door 7 is provided with a so-called safety shoe 27 for reversing the door by receiving a force in the door opening direction. The safety shoe 27 may be configured and operated in a known manner. Further, in the first embodiment, the belt circulating mechanism 15 (door opening/closing belt 13) is arranged apart from the safety shoe 27. That is, the belt circulation mechanism 15 (door opening/closing belt 13) is prepared as a detection mechanism different from the safety shoe 27.

Although not limited to the present invention, in the first embodiment, the detection belt 21 as the first belt and the door opening/closing belt 13 as the second belt are of the same type. That is, the belt prepared for the door opening/closing belt 13 is used as it is as the detection belt 21.

Next, the operation of the first embodiment described above will be described.
In the state where a person or an article (for example, a luggage or a trolley) is not in contact with the safety shoe 27, for example, when the pet moves to the other with respect to the owner who is on one side of the car and the landing, the safety shoe 27 A situation may occur in which entrapment is not detected only by detection by.

This will be specifically described with reference to FIG. It is assumed that a flexible body such as a pet lead 31 or the like such as a cord or a strip is sandwiched between the detection belt 21 and the fixed side bar 17 and the car 3 moves up and down in that state. More specifically, after the owner and the pet have entered the car 3, the pet is returned to the original landing 5 just before the door is closed when the owner is in the car 3 and the door is in that state. Suppose that the car 3 closes and the car 3 rises. In this case, since the pet is at the original landing 5, the lead 31 moves so as to descend when viewed from the car 3, as indicated by the arrow L.

Here, since the outer peripheral surface of the detection belt 21 is provided with irregularities and the leads 31 are caught in the irregularities, the detection belt 21 is also driven as the lead 31 descends, as indicated by the arrow B. .. Due to the revolving movement of the detection belt 21 due to this follow-up, the pair of wheels 19 wound around is also driven. Further, the rotation of the wheel 19 is sensed by the rotation sensor 23.

When the rotation amount of the wheel 19 detected by at least one of the rotation sensors 23 exceeds a threshold value, the control device 25 has a foreign substance between the door and the object to be hit, and the foreign substance causes the detection belt 21 to follow. It is judged that the car is trapped, that is, it is judged that the trapping has occurred, and the process of stopping the elevator of the car is started. Further, the control device 25 has a problem in at least one of the rotation sensors 23 when the difference between the rotation amounts of the pair of wheels 19 detected by the pair of rotation sensors 23 exceeds a predetermined value. Judge that.

According to the first embodiment configured as described above, the following excellent advantages are obtained. As described above, according to the first embodiment, the car is operated in a state where a relatively flexible foreign material such as a lead-like cord or a belt-like member is sandwiched between the belt winding mechanism and the fixed side bar. When the door is moved up and down, the door opening/closing belt and the wheel are driven to detect the trapping. Here, in a contact plate type device that can move up and down by elastic support, vertical vibration may occur in the contact plate due to the influence of inertia generated when the car starts to move up and down. There is a difficult problem. Also, if a spring with a large (hard) spring constant is used to reduce this effect, then the high elastic reaction force may increase the pulling force acting on the pet via the lead. .. On the other hand, in the first embodiment, the detection belt itself can only move circularly, but the rotation shaft of the wheel supporting it and the entire detection belt do not move vertically with respect to the door. Therefore, even if there is an unavoidable inertia when the car is moved up and down, the detection accuracy is not adversely affected and the high detection accuracy can be maintained. Further, in the first embodiment, since the door opening/closing belt freely moves around, the reaction force as much as the elastic support does not act on the pet via the string. Further, even if the car is lifted while being sandwiched, the grace range in which a large force does not act on the pet can be earned for the entire height of the door, that is, the linear extension distance of the belt close thereto. Therefore, it is possible to secure a grace period in which a large force does not act on the pet over a considerably large range. As described above, according to the first embodiment, it is possible to enhance the protection effect for pets and to improve the detection accuracy of occurrence of trapping.

Further, in the first embodiment, when the rotation amount of the wheel detected by at least one of the rotation sensors exceeds the threshold value, the occurrence of trapping is recognized, so that the door opening/closing belt may be slightly moved due to some cause. There is an advantage that the possibility of being erroneously determined as the occurrence of entrapment is extremely low if it is only done. This also makes it easy to increase the detection accuracy.

Further, as described above, the grace range in which a large force does not act on the pet can be earned for the linear extension distance of the belt close to the total height of the door. That is, the fact that the grace range in which a large force does not act on the pet is long as described above also has an advantage that it is possible to employ a control which is sufficiently in time even if the pet is caught and then gently stopped. On the contrary, in the case of the elastic support type, a large force may be applied to the pet if it is not stopped immediately after the trapping is detected, and thus it is inevitably necessary to perform the sudden stop control. In other words, in the first embodiment, it is possible to protect the pet by adopting not only the control that is friendly to the pet but also the control that is friendly to the person who is the passenger.

Furthermore, when a rotation sensor is provided on each of the pair of wheels and the output of the pair of rotation sensors is used, the occurrence of entrapment can be detected without problems even if one of the sensors fails. It is possible to notify the failure of the rotation sensor while processing the occurrence of the trapping, prevent the failure state from being left for a long time, and secure a safer state.

Further, when a pulse encoder or a tilt angle sensor is used as the rotation sensor, the pulse encoder as a door opening/closing speed sensor often used in existing elevators or the tilt angle sensor as a scale sensor is used as the rotation sensor. It can also be used as a sensor, eliminating the need to redesign the elements dedicated to the rotation sensor.

Further, as the detection belt used in the belt winding mechanism, a door opening/closing belt that is often adopted in existing elevators can be used, and it is not necessary to redesign an element dedicated to the belt winding mechanism.

Further, in the present first embodiment, the safety shoe and the belt circling mechanism are prepared as separate elements, that is, the pinch of a person and the pinch of a string-like foreign object are individually detected. Each of them has an advantage that it is easy to maintain so that the functions are maximized under the suitable design and maintenance according to the objects to be sandwiched.

Although the contents of the present invention have been specifically described with reference to the preferred embodiments, those skilled in the art can take various modifications based on the basic technical idea and teaching of the present invention. It is self-explanatory.

For example, in the above-described embodiment, a pair of rotation sensors are provided corresponding to the pair of wheels in the belt circulation mechanism, and these rotation sensors perform processing related to occurrence of pinching and malfunction of the rotation sensor. The mode to be utilized was described. However, the present invention is not limited to such an embodiment, and corresponds to a configuration in which the rotation sensor is provided only on one of the pair of wheels in the belt circulation mechanism, or to the pair of wheels in the belt circulation mechanism. Then, in the configuration provided with the pair of rotation sensors, even when the rotation amount of the wheel detected from the one rotation sensor exceeds the threshold value, even if it is configured to proceed with the process regarding the occurrence of entrapment Good.

In addition, the above-described embodiment has been described as an example of the present invention in which a double-opening type car door is provided with a belt circulating mechanism. However, the present invention is not limited to this, and can be implemented as a landing door provided with a belt circling mechanism, and further, a belt wrapping mechanism is provided for a single-opening type car door or landing door. It can also be implemented as provided. Regarding the single-open type, a so-called door-contact member corresponds to a door-contact object that abuts on the door.

1 hoistway, 3 cars, 5 halls, 7 car doors, 9 hall doors, 13 door opening/closing belts, 15 belt orbiting mechanism, 19 wheels, 21 detection belts, 23 rotation sensor, 25 control device, 27 safety shoes.

Claims (6)

A cage that can be moved in the hoistway,
At least one door that is openably and closably provided in the car or the hall,
An elevator having the door and a door-to-door contact object that abuts when fully closed,
At the front end portion in the door closing direction of the door, a belt circulating mechanism is provided,
The belt circling mechanism includes a pair of upper and lower wheels separated in the car up-and-down direction, and a first belt laid across the pair of wheels ,
The first belt has an uneven outer periphery when viewed along the rotation axis direction of the wheel,
Elevator. A cage that can be moved in the hoistway,
At least one door that is openably and closably provided in the car or the hall,
An elevator having the door and a door-to-door contact object that abuts when fully closed,
At the front end portion in the door closing direction of the door, a belt circulating mechanism is provided,
The belt circling mechanism includes a pair of upper and lower wheels that are separated from each other in the car up-and-down direction, and a first belt that is laid across the pair of wheels .
With one rotation sensor and a control device ,
The rotation sensor detects the rotation amount of the corresponding one of the wheels,
The control device, when the amount of rotation of the wheel detected from the rotation sensor exceeds a threshold value, starts a process of stopping the elevator of the car,
Elevator. A cage that can be moved in the hoistway,
At least one door that is openably and closably provided in the car or the hall,
An elevator having the door and a door-to-door contact object that abuts when fully closed,
At the front end portion in the door closing direction of the door, a belt circling mechanism is provided,
The belt circling mechanism includes a pair of upper and lower wheels that are separated from each other in the car up-and-down direction, and a first belt that is laid across the pair of wheels .
A pair of rotation sensor and control device ,
Each of the pair of rotation sensors detects the rotation amount of the corresponding wheel,
The control device, when the rotation amount of the wheel detected from at least one of the rotation sensors exceeds a threshold value, starts the elevator stop process of the car, and the detected from the pair of rotation sensors When the difference between the rotation amounts of the pair of wheels exceeds a predetermined value, it is determined that at least one of the rotation sensors has a problem.
Elevator. The rotation sensor is a pulse encoder or a tilt angle sensor,
The elevator according to claim 2 or 3 . A cage that can be moved in the hoistway,
At least one door that is openably and closably provided in the car or the hall,
An elevator having the door and a door-to-door contact object that abuts when fully closed,
At the front end portion in the door closing direction of the door, a belt circling mechanism is provided,
The belt circling mechanism includes a pair of upper and lower wheels that are separated from each other in the car ascending/descending direction, and a first belt that is laid across the pair of wheels .
A second belt that is rotated to cause the door to open and close ,
The same type of belt is used for the first belt and the second belt,
Elevator. A cage that can be moved in the hoistway,
At least one door that is openably and closably provided in the car or the hall,
An elevator having the door and a door-to-door contact object that abuts when fully closed,
At the front end portion in the door closing direction of the door, a belt circulating mechanism is provided,
The belt circling mechanism includes a pair of upper and lower wheels separated in the car up-and-down direction, and a first belt laid across the pair of wheels ,
The door is provided with a safety shoe for reversing the door by receiving a force in the door opening direction,
The first belt is arranged apart from the safety shoe,
Elevator.

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