JP5374901B2 - Elevator control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent wrong detection of nipping an object with an elevator door. <P>SOLUTION: This device comprises door closing check signal receiving means 5 for receiving door closing check signals of an elevator door, detection signal receiving means 6 for receiving detection signals indicating a condition that a safety shoe 3a provided to a door contact end of the elevator door movably in an opening/closing direction of the elevator door, measuring means 7 for measuring a continuation time for receiving the detection signals, and object nipping determination means 8 for determining that the elevator door does not nip the object when the continuation time is measured shorter than a determination time and determining that the elevator door nips the object when the continuation time is measured longer than the determination time. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an elevator control device that prevents erroneous detection of object pinching by an elevator door.

  Various safety devices are provided in the elevator door. One of them is safety shoes. When the safety shoe operates during the door closing operation or when the safety shoe is fully opened, a switch provided in the elevator door operates. By the operation of this switch, the elevator door stops the door closing operation or reverses after the stop. As a result, the car does not travel with the elevator door sandwiching an object.

  However, there is a gap at the tip of the safety shoe. When a string or the like having a soft cross section is sandwiched between the gaps, the object may not be detected by the switch described above. Thus, for example, when a user with one end of a dog's string is in the basket and a dog connected to the other end of the string is at the landing, the elevator door closes and the basket starts to run. There was a problem that a user or a dog connected to each other was pulled by the string.

  As a technique to solve this problem, when the safety shoe is activated while the car is running, the car stops running, and when the car is in the door zone of the departure floor, the door is opened, and the car is not in the door zone of the departure floor. It has been proposed to return to the departure floor and open it when entering the door zone of the departure floor. Thereby, it can prevent that the tension | tensile_strength of the string pinched | interposed into the elevator door becomes excessive (for example, refer patent document 1).

JP-A-6-219672

  However, in the case of the device described in Patent Document 1, the safety shoe may operate due to vibration during car traveling. In this case, there has been a problem of erroneous detection of object pinching by the elevator door.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to prevent erroneous detection of object pinching by an elevator door.

The elevator control apparatus according to the present invention is provided with a door closing confirmation signal receiving means for receiving a door closing confirmation signal of the elevator door, and movable in the opening / closing direction of the elevator door with respect to a door end of the elevator door. Detection signal receiving means for receiving a detection signal indicating a state in which the safety shoe has moved in the door pocket direction with respect to the door end, a measurement means for measuring a duration during which the detection signal is received, and the door closing When the confirmation signal is received, if the duration time is measured shorter than the determination time, it is determined that the elevator door does not sandwich an object, and the reception time of the door closing confirmation signal is determined so that the duration time is the determination time. If it is longer measurement than the elevator door and a body pinching determination means determines that sandwiches the object, the determination time, the Sefute Those which are larger than the natural period of the shoe.

  According to the present invention, it is possible to prevent erroneous detection of object pinching by the elevator door.

  The best mode for carrying out the present invention will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
1 is a diagram schematically showing an elevator door and an elevator control apparatus according to Embodiment 1 of the present invention.

  FIG. 1 shows a state where a double-opening type elevator door is fully closed on a predetermined floor of a building. In FIG. 1, 1a and 1b are landing doors. These landing doors 1a and 1b are provided at the entrances and exits of the landing formed on each floor of the building. Reference numerals 2a and 2b denote basket doors. These cage doors 2a and 2b are provided at the entrance of the cage. The cage doors 2a and 2b open and close in conjunction with the landing doors 1a and 1b via an engagement device (not shown).

  3a and 3b are safety shoes. The safety shoe 3a is provided so as to be movable in the opening / closing direction of the elevator door with respect to the door end of the cage door 2a. The safety shoe 3a is normally disposed so as to protrude in the door contact direction with respect to the door contact end of the cage door 2a. The safety shoe 3a is provided with a detection switch 3c. The safety shoe 3a having such a configuration has a function of transmitting a detection signal by operating the detection switch 3c when the safety shoe 3a moves in the door pocket direction with respect to the door end of the cage door 2a due to contact with an object. On the other hand, the safety shoe 3b is disposed so as to be pulled in the door pocket side direction with respect to the door end of the cage door 2b.

  Moreover, a switch (not shown) is provided in the door device (not shown) of the elevator door. This switch has a function of transmitting a door closing confirmation signal of the elevator door when the elevator door is fully closed. The elevator door may be provided with other sensors (not shown) such as a photoelectric device.

  The two landing doors 1a and 1b, the two car doors 2a and 2b, and the two safety shoes 3a and 3b having the above-described configuration are provided so as to have a slight gap at the opposing portions so as not to interfere even when fully closed. And the drive part (not shown) of the cage doors 2a and 2b, the safety shoe 3a, and the switch of the door device are connected to the control device 4. The control device 4 has a function of controlling the operation of the elevator door and the car based on detection signals and door closing confirmation signals respectively received from the safety shoe 3a and the door device switch. The control device 4 according to the present embodiment is characterized by a method for controlling the operation of the elevator door and the basket. Hereinafter, characteristic points of the control device 4 in the present embodiment will be described.

  As shown in FIG. 1, the control device 4 of the present embodiment includes a door closing confirmation signal receiving means 5, a detection signal receiving means 6, a measuring means 7, an object pinching determination means 8, a car position detection means 9, a departure opening memory. A means 10, a basket movement status determination means 11, and a basket operation control means 12 are provided.

  The door closing confirmation signal receiving means 5 has a function of receiving a door closing confirmation signal from a switch of the door device. The detection signal receiving means 6 has a function of receiving a detection signal from the detection switch 3c. The measuring means 7 has a function of measuring the duration during which the detection signal receiving means 6 is receiving the detection signal.

  The object pinching determination means 8 has a function of determining whether or not an object is pinched in the elevator door. Specifically, when the detection signal receiving means 6 receives a detection signal when the door closing confirmation signal receiving means 5 does not receive the door closing confirmation signal of the elevator door, the object pinching determination means 8 Judge that it is sandwiched.

Furthermore, the object pinching determination means 8 also has a function of performing the following characteristic operations. That is,
When the door closing confirmation signal receiving means 5 receives the door closing confirmation signal of the elevator door and the duration time measured by the measuring means 7 is shorter than the determination time, the object pinching determination means 8 causes the elevator door to pinch the object. Judge that there is not. On the other hand, if the duration time measured by the measuring means 7 is longer than the determination time when the door closing confirmation signal receiving means 5 receives the elevator door closing confirmation signal, the object pinching determination means 8 causes the elevator door to pinch the object. It is judged that In the present embodiment, the determination time is set to a value larger than the natural period of the safety shoe 3a.

  The car position detecting means 9 has a function of receiving a signal related to the car position from a general car position detecting device (not shown) and detecting the car position. The departure floor storage means 10 has a function of storing the departure floor where the basket was stopped immediately before.

  The car movement status judging means 11 is a car detected by the car position detecting means 9 when the object pinching judging means 8 judges that the elevator door is pinching an object while the car is stopped and the car is running. Has a function of determining whether or not the position is within the door zone of the departure floor stored in the departure floor storage means 10.

  The car operation control means 12 has a function of controlling the overall operation of the elevator door and the car. In the present embodiment, the basket operation control means 12 has a function of performing the following characteristic operations in particular. In other words, the car operation control means 12 has a function of stopping the car when the car is running when it is judged by the object pinching judgment means 8 that an object is caught in the elevator door.

  Furthermore, the basket operation control means 12 has a function of causing the car to reversely travel into the door zone of the departure floor when the position of the basket is determined to be outside the door zone of the departure floor by the basket movement state determination means 11. The car operation control means 12 has a function of opening the elevator door in a state where the car is in the door zone of the departure floor.

Next, a method for determining whether an object is caught by the elevator door will be described in more detail with reference to FIGS.
FIG. 2 is a diagram schematically showing a state immediately after an elevator door in which the elevator control device according to Embodiment 1 of the present invention is used has caught a string.

  FIG. 2 shows, for example, a state where a user having one end of a dog's string is in the basket, a dog connected to the other end of the string is at the landing, and the elevator door sandwiches the string. . As shown in FIG. 2, a soft and small cross-sectional object 13 such as a dog strap is slightly formed between the opposing portions of the two landing doors 1a and 1b, the two basket doors 2a and 2b, and the two safety shoes 3a and 3b. May enter the gap. In this case, the detection switch 3c of the safety shoe 3a does not transmit a detection signal.

  At this time, the elevator door is fully closed. For this reason, the switch of the door device transmits a door closing confirmation signal. That is, the door closing confirmation signal receiving means 5 receives the door closing confirmation signal. Further, the object 13 is not detected by other sensors depending on the position where the object 13 is sandwiched. That is, FIG. 2 shows the same situation as when the elevator door is normally fully closed. In this case, the object pinching determination means 8 determines that the elevator door does not pinch the object 13.

FIG. 3 is a diagram schematically showing a case where the tension of the string caught by the elevator door in which the elevator control device according to Embodiment 1 of the present invention is used is increased.
As shown in FIG. 3, when the cage starts running with one end of the string in the cage and the other end in the landing, the relative positions of the ends of the string are separated by the movement of the cage. As the relative position moves away, the tension on the string increases. Due to the increase in tension, the safety shoe 3a moves in the door pocket direction.

  With this movement, the detection switch 3c operates. With this operation, the detection signal receiving unit 6 receives the detection signal from the detection switch 3c. At this time, the measuring means 7 measures the duration during which the detection signal receiving means 6 is receiving the detection signal. And if the tension | tensile_strength concerning a string is maintained continuously, the measurement means 7 will measure the continuation time longer than determination time. In this case, the object pinching determination means 8 determines that the elevator door is pinching the object 13.

  Note that the vibration of the traveling car may be transmitted to the safety shoe 3a. In this case, generally, the safety shoe 3a vibrates with its own natural period. However, the object pinching determination means 8 sets the determination time to a value larger than the natural period of the safety shoe 3a. For this reason, the object pinching determination means 8 determines that the elevator door does not pinch the object 13.

Next, the operation of the elevator including the determination of the object 13 being caught by the elevator door will be described with reference to FIG.
FIG. 4 is a flowchart for explaining the operation of the elevator according to Embodiment 1 of the present invention.

  First, in step S101, the basket starts traveling. That is, the door closing confirmation signal receiving means 5 receives the door closing confirmation signal, and proceeds to step S102. In step S102, for example, the detection switch 3c is operated when the object 13 comes into contact with the safety shoe 3a, and the process proceeds to step S103. In step S103, the detection signal receiving means 6 receives a detection signal from the detection switch 3c. Moreover, the measuring means 7 measures the duration during which the detection signal receiving means 6 is receiving the detection signal. Furthermore, the object pinching determination means 8 determines whether or not the duration is equal to or longer than the natural period of the safety shoe 3a. If the duration is not equal to or greater than the natural period of the safety shoe 3a, it is assumed that the safety shoe 3a has operated due to the vibration of the cage or the like, and the normal traveling of the basket is continued, and the process returns to step S102.

  On the other hand, if the duration is equal to or greater than the natural period of the safety shoe 3a, the process proceeds to step S104. In step S104, the basket operation control means 12 stops the basket and proceeds to step S105. In step S105, the car movement status judging means 11 judges whether or not the car position is within the door zone of the departure floor.

If the position of the basket is not within the door zone of the departure floor, the process proceeds to step S106.
In step S106, the basket traveling control means 12 reverses the traveling direction of the basket, and the process proceeds to step S107. In step S107, the car travels at a low speed until it reaches the door zone on the departure floor. In step S108, the basket operation control means 12 stops the basket, and the process proceeds to step S109.

  In step S109, the basket operation control means 12 opens the elevator door, and proceeds to step S110. In step S110, the operation of the elevator is suspended. On the other hand, if it is determined in step S105 that the car is within the door zone of the departure floor, the process proceeds to step S109 without going through steps S106 to S108. Then, similarly to the above, the car stops, and the operation of the elevator is stopped in step S110.

  According to the first embodiment described above, it is not determined that the elevator door is sandwiching the object 13 if the duration of the movement of the safety shoe 3a in the door pocket direction is not longer than the natural period of the safety shoe 3a. . For this reason, even if the safety shoe 3a vibrates during traveling of the car, the object 13 is not erroneously detected by the elevator door. Therefore, there is no need to stop the basket unnecessarily. That is, the operation efficiency of the elevator does not decrease. Further, the determination time is a value larger than the natural period of the safety shoe 3a. For this reason, erroneous detection of the object 13 is prevented more reliably.

  On the other hand, when the string is actually sandwiched in the elevator door, the state where the safety shoe 3a is moved in the door pocket direction by the tension applied to the string is continued. For this reason, the object pinching determination means 8 can reliably detect the pinching of the string by the elevator door. And by this detection, the basket operation control means 12 can stop a basket reliably. Furthermore, the elevator door can be opened in the door zone of the departure floor. Then, after the doors 2a and 2b are opened, the strings can be removed. For this reason, the tension | tensile_strength of a string can be loosened and the user and dog respectively connected to the both ends of a string are not pulled. That is, according to the control device 4 in the present embodiment, it is possible to reliably detect that the elevator door has pinched the object 13 without reducing the operation efficiency of the elevator.

  In addition, in this Embodiment, the control apparatus 4 utilized for a double opening type elevator door was demonstrated. However, the control device 4 of the present invention can be easily applied to a single-open elevator door. Further, in the control device 4 of the present invention, as in the case of a general control device, if the detection signal is received by the detection signal receiving means 6 while the elevator is open, it is determined that the object 13 is sandwiched. Needless to say.

It is a figure which shows typically the elevator door and the control apparatus of an elevator in Embodiment 1 of this invention. FIG. 2 is a diagram schematically showing a state immediately after an elevator door in which the elevator control device according to Embodiment 1 of the present invention is used has caught a string. It is a figure which shows typically the case where the tension | tensile_strength of the string which the elevator door in which Embodiment 1 of this invention uses the elevator door utilized increases. It is a flowchart explaining the operation | movement of the elevator in Embodiment 1 of this invention.

Explanation of symbols

1a, 1b landing door, 2a, 2b car door, 3a, 3b safety shoe,
3c detection switch, 4 control device, 5 door closing confirmation signal receiving means,
6 detection signal receiving means, 7 measuring means, 8 object pinching judging means,
9 basket position detection means, 10 departure floor storage means, 11 basket movement status judgment means,
12 basket movement control means, 13 objects

Claims (3)

A door closing confirmation signal receiving means for receiving an elevator door closing confirmation signal;
A detection signal receiving means for receiving a detection signal indicating that a safety shoe provided so as to be movable in the opening / closing direction of the elevator door with respect to the door contact end of the elevator door moves in the door bag direction with respect to the door contact end. When,
Measuring means for measuring the duration of receiving the detection signal;
When the door closing confirmation signal is received, if the duration is measured shorter than the determination time, it is determined that the elevator door does not sandwich an object,
When the door closing confirmation signal is received, if the duration is measured longer than the determination time, an object pinching determination unit that determines that the elevator door is pinching an object;
With
The control apparatus for an elevator, wherein the determination time is a value larger than a natural period of the safety shoe. When it is determined that the elevator door sandwiches an object, a car operation control means for stopping the elevator car whose doorway opens and closes by the elevator door ,
The elevator control device according to claim 1, further comprising: Car position detecting means for detecting the position of the car;
Departure floor storage means for storing the departure floor where the basket was stopped immediately before;
When it is determined that the elevator door is sandwiching an object during the traveling of the car, the car movement status determining means for determining whether the position of the car is within the door zone of the departure floor;
With
The car operation control means, when the position of the car is determined to be door zone outside of said starting floor, the car, characterized by reversing travel to said departure floor door zone 請 Motomeko The elevator control apparatus according to 2.

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