JP2011132015A - Door device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety device for a door device of an elevator capable of preventing a door from catching a foreign material by only programming a control program. <P>SOLUTION: The door device of the elevator includes a driving device 1 for opening/closing car doors 6a and 6b of the elevator; a first door closing position detecting means 7 provided above the car doors 6a and 6b to detect that the car doors 6a and 6b reach a first door closing position previously set at a position on this side of a door closing end during the operation for closing the car door 6a, 6b; a second door closing position detecting means 8 provided in an upper part of a platform to detect that the car doors 6a and 6b reach the door closing end and that the doors 6a and 6b are fully closed; and a door control section 15 for determining that the car doors 6a and 6b are fully closed only when signals output from both of the first door closing position detecting means 7 and the second door closing position detecting means 8 are ON. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an elevator door device that can satisfactorily detect a thin object such as a rope sandwiched between elevator doors.

  Conventionally, the door safety that determines that the door of the elevator is closed has no foreign object detected about 10 mm before the position where the door is fully closed, and the effect of the door safety becomes invalid. That is, even if a thin object such as a rope is sandwiched, the door safety does not detect a foreign object, and the elevator may travel as it is as if it is normally closed.

  Therefore, in addition to the door safety that is normally installed in the elevator, a dedicated detection mechanism unit for detecting pinching of a rope or the like is provided to cope with the situation (for example, Patent Document 1). And Patent Document 2).

JP 2004-323189 A JP 2006-199389 A

  In the conventional door safety device as described above, it is necessary to provide a dedicated detection mechanism for detecting foreign object pinching in a standard elevator, and in order to provide a new detection mechanism for an existing elevator, it is a big problem. Renovation was required.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an elevator door device that can be attached with a general proximity sensor and that can prevent a foreign object from being caught by building a control program.

  In order to achieve the above object, an elevator door device according to the present invention includes a drive device for opening and closing an elevator car door and an upper side of the car door, and the car door is in front of the door closing end during the door closing operation. A first door closing position detecting means for detecting that the vehicle has reached a preset first door closing position, and the car door is provided above the car door, the car door being at the first door closing position. A second door closing position detecting means for detecting that the door closing end has been reached after detecting the detecting means; and both the first door closing position detecting means and the second door closing position detecting means. And a door control unit that determines that the car door is fully closed only when an output signal is detected.

  According to the present invention, it is possible to prevent a foreign object from being caught in a door with a simple configuration.

It is a lineblock diagram of the door device of the elevator concerning a 1st embodiment of the present invention. It is a block diagram showing composition of an elevator door device concerning a 1st embodiment of the present invention. It is a block diagram which shows the structure of the door apparatus of an elevator containing the structure of the data processing part which concerns on the 1st Embodiment of this invention. It is a schematic diagram explaining the movement distance calculation method by the movement distance calculation means used for the 1st Embodiment of this invention. It is a block diagram of the door apparatus of the elevator which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the structure of the door apparatus of the elevator which concerns on the 2nd Embodiment of this invention. It is an outline figure explaining position detection of a car door concerning the 2nd example of the present invention. It is a block diagram which shows the control means for preventing the malfunctioning of the door apparatus of an elevator.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a configuration diagram of an elevator door device according to a first embodiment of the present invention.

  FIG. 2A is a block diagram showing the configuration of the elevator door device according to the first embodiment of the present invention, and FIG. 2B is the elevator door device including the configuration of the data processing unit according to the first embodiment of the present invention. It is a block diagram which shows the structure of these.

  As shown in FIG. 1, the driving force of the door motor (M) 1 which is a driving device for opening and closing the door of the elevator is transmitted to one pulley 3b of a pair of pulleys mounted and arranged on both sides in the header 2. The pulley 3a rotates integrally with the pulley 3b via the belt 4.

  The upper end of the door hanger 5a is attached and fixed to the belt 4 positioned at the upper portion, and the upper end of the door hanger 5b is fixed to the lower belt 4 and the lower ends of the door hangers 5a and 5b are connected to the car doors 6a and 6b. It is connected to the upper end.

  As a result, the driving force of the door motor 1 is transmitted to the car doors 6a and 6b via the belt 4 and the door hangers 5a and 5b, and the car doors 6a and 6b are installed so as to be opened and closed in the horizontal direction. Has been.

  The car doors 6a and 6b are provided with door safety support portions 12a and 12b to which sensors 13a and 13b are attached. The door safety support portions 12a and 12b are connected to the door safety 10a via the link mechanism portions 11a and 11b. 10b.

  Normally, the door safetys 10a and 10b are invalidated at a position of about 10 mm before full closing. Therefore, the first embodiment of the present invention is characterized in that the first door closing position detecting means 7 and the second door closing position detecting means 8 are provided separately from the door safetys 10a and 10b.

  As shown in FIG. 2a, the door control unit 15 performs foreign object detection, which will be described in detail later, using output signals from the first door closing position detecting means 7 and the second door closing position detecting means 8.

  The first door closing position detecting means 7 operates from the position where the car doors 6a and 6b are fully closed to a position about 10 mm in front to allow a margin for erroneous detection that may occur due to factors such as vibration. And set it on the header 2. The first door closing position detecting means 7 uses a switch or a sensor whose details will be described later.

  The state in which the car doors 6a and 6b are fully closed here refers to a state in which the car doors 6a and 6b reach the door closing end and both are in contact with each other. In the case of a sliding door type, the car door reaches the door closed end and is stored in a car door storage unit (not shown).

  When the door safety 10a, 10b, which is a safety device that prevents the car doors 6a, 6b from being caught during the door closing operation, comes into contact with an obstacle during the door closing operation, the link mechanism portions 11a, 11b are operated, and the door safety The sensors 13 a and 13 b attached to the support parts 12 a and 12 b are turned on, and an output signal is sent to the door control part 15.

  Receiving this output signal, the door control unit 15 sends a door opening command to the door motor 1 to open the car doors 6a and 6b. However, the door safety 10a, 10b is normally released before the fully closed state.

  Here, the second door closing position detection for detecting that the car doors 6a and 6b are fully closed for the purpose of detecting a foreign object being caught even in a minute range where the door safety 10a and 10b are invalid. The means 8 is installed on the header 2. The second door closing position detecting means 8 is on the same axis as the first door closing position detecting means 7 and has an interval of about 10 mm. When the car doors 6a and 6b are fully closed, the door is closed. It is assumed that the hanger 5a is detected. The second door closing position detecting means 8 uses a switch or a sensor whose details will be described later.

  In the elevator door device according to the first embodiment of the present invention, the output signal from the first door closing position detecting means 7 is on, that is, the car door, separately from the foreign matter detection by the door safety 10a, 10b. 6a, 6b detects that the first door closing position set in advance is reached before the door closing end during the door closing operation, and an output signal from the second door closing position detecting means 8 Is turned on, that is, when it is detected that the car doors 6a and 6b have reached the door closing end, the door control unit 15 determines that the car doors 6a and 6b are fully closed and no foreign matter is caught, and the elevator It is set to permit running.

  On the other hand, when the door closing operation of the car doors 6a and 6b is finished, the output signal from the first door closing position detecting means 7 is ON, but the output from the second door closing position detecting means 8 is ON. When the signal is off, the door control unit 15 determines that a thin object such as a rope or a small foreign object is sandwiched between the car doors 6a and 6b, and performs the door opening operation without allowing the elevator to travel. Is set to

  However, during elevator travel, the function of the second door closing position detecting means 8 is used to prevent malfunction caused by the signal of the second door closing position detecting means 8 being turned off due to car vibration or the like. Keep it from working.

  In order to measure the rotation amount of the door motor 1, a pulse generator (PG) 9 is connected to the door motor 1, and the rotation of the door motor 1 is measured and monitored with a pulse value output from the pulse generator 9.

  In the present embodiment, in addition to the foreign object detection described above, the movement data of the car doors 6a and 6b obtained from the output signal from the pulse generator 9, as shown in FIG. 2b, is stored in the first movement distance calculation means 16 and the door closing position memory. The data is sent to the data processing unit 14 comprising the device 17, and the door control unit 15 is set so as to determine whether or not the door closing operation of the car doors 6a and 6b has been completed based on the data.

  Then, in order to confirm that the car doors 6a and 6b are fully closed, as shown in FIG. 2b, the car door is obtained from the pulse value obtained by the pulse generator 9 from the door closing start to the door closing end. The first moving distance calculating means 16 for calculating the moving distances 6a and 6b is used. Here, the door control unit 15 confirms that the door closing operation has been completed.

  A method for calculating the movement distance of the car doors 6a and 6b for confirming that the car doors 6a and 6b are fully closed will be described with reference to FIGS.

  First, the rotation amount of the door motor 1 is detected from the pulse value count obtained by the pulse generator 9, and the rotation amounts of the pulleys 3a and 3b are obtained from the gear ratio between the door motor 1 and the pulleys 3a and 3b. Then, the travel distances of the car doors 6a and 6b are calculated by multiplying the circumferences of the pulleys 3a and 3b by the rotation amounts of the pulleys 3a and 3b.

  As shown in FIG. 2b, the door closing position storage device 17 is provided in the data processing unit, and the pulse value counted by the pulse generator 9 from the door closing start position to the door closing end position of the car doors 6a and 6b is used as a reference pulse value. Remember as. Therefore, the car doors 6a and 6b are fully closed by comparing the pulse value calculated by the first moving distance calculating means 16 at the end of the door closing operation with the reference pulse value stored in the door closing position storage device 17. Judge whether or not. A more specific method will be described below with reference to FIG.

  FIG. 3 is a schematic diagram showing movement distance calculation using the first movement distance calculation means 16 according to the first embodiment of the present invention.

  When the door opening / closing operation is performed, if the pulse value obtained at the end of the door closing operation, for example, door closing A shown in FIG. The doors 6a and 6b are fully closed, it is determined that no foreign matter is caught, and the elevator is allowed to travel.

  On the other hand, as in the case of door closing B, when the pulse value obtained from the pulse generator 9 at the end of the door closing operation is sent to the data processing unit 14, as a result, there is a difference from the reference pulse value. Since the distance is short, it is determined that the foreign object is caught and the car doors 6a and 6b are not fully closed, and the door control unit 15 performs the door opening operation without allowing the elevator to travel.

  By comparing the pulse value at the end of the door closing operation obtained by the pulse generator 9 in this way with the reference pulse value indicating that the car doors 6a and 6b are fully closed, it is also possible to detect a thin foreign object such as a rope. Detect pinching.

  As described above, the first door closing position detecting means 7 for detecting that the car doors 6a and 6b have reached the position before the fully closed position and the car doors 6a and 6b are detected to have reached the fully closed position. By installing the second door closing position detecting means 8, it becomes possible to detect the pinching of a thin foreign object such as a rope by the output signals from both detecting means, and the measured pulse value counted by the pulse generator 9 and the door closing position. By comparing the reference pulse values stored in the storage device 17 with each other, the movement distances can be compared to detect a foreign object.

  That is, even when the first door closing position detecting means 7 or the second door closing position detecting means 8 malfunctions due to vibration or noise, the pulse value obtained at the end of the door closing operation of the car doors 6a and 6b. Is compared with the reference pulse value, the detection of the foreign object caught in the elevator door is checked twice, and the malfunction of the elevator door device can be reduced. Therefore, the elevator can travel safely.

  However, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made within the scope of the technical idea described in the claims.

  That is, in the above embodiment, the pulse value counted while the car doors 6a and 6b are moved from the fully opened position to the fully closed position is used as the reference pulse value. A predetermined set value may be used as the reference pulse value. Further, the reference pulse value can be changed at any time by setting change or the like. Further, the data stored in the door closing position storage device 17 is not fixed to the data stored once, and the data can be changed. .

(Second Embodiment)
FIG. 4 is a block diagram showing an elevator door device according to a second embodiment of the present invention. FIG. 5 is a block diagram showing an elevator door device according to a second embodiment of the present invention. FIG. 6 is a schematic view of the position detection of the car door 6a according to the second embodiment of the present invention.

  The second embodiment is different from the first embodiment in that the pulse value count by the pulse generator 9 is measured between the distance from the first door closing position detecting means 7 to the second door closing position detecting means 8. It is a point to do. In the present embodiment, this distance refers to a distance L shown in FIGS. 4 and 6 described later.

  In the case of the first embodiment, depending on the type of belt 4, vibration is caused by noise during opening and closing of the car doors 6a and 6b, such as when a large torque is applied during acceleration or reopening of the doors of the car doors 6a and 6b. When this occurs, the belt 4 may slip and the pulse value counted by the pulse generator 9 may deviate.

  In the present embodiment, as shown in FIG. 4, the distance L is measured with the movement of the door hangers 5a and 5b as the door closing operation of the car doors 6a and 6b.

  First, the configuration of the present embodiment will be described with reference to FIG. FIG. 5 shows a case where a second movement distance calculation means 18 is added to the data processing unit 14 of FIG. 2b.

  The pulse value obtained from the pulse generator 9 is counted by the first movement distance calculation means 16 as in the first embodiment, but separately, the second movement distance calculation means 18 performs data processing. Provided in the part 14. The second moving distance calculating means 18 shown in FIG. 5 starts counting pulses at a position where the output signal from the first door closing position detecting means 7 is turned on, and the second door closing position detecting means 8. The moving distance of the car door 6a up to the position where the output signal from is turned on is calculated. The first moving distance calculation means 16 and the door closing position storage device 17 have the same configuration as that of the first embodiment.

  Next, the effect | action of this embodiment is demonstrated using FIG.

  The distance from the position of the car door 6a where the output signal from the first door closing position detecting means 7 is turned on to the time when the output signal from the second door closing position detecting means 8 is turned on, that is, the first The distance from the installation position of the door closing position detection means 7 to the installation position of the second door closing position detection means 8 is a known value because it is a default value or a setting value by an administrator or the like. Here, the distance L shown in FIGS. 4 and 6 is used. The door control unit 15 determines whether or not the car doors 6a and 6b are fully closed by comparing the distance L with the movement distance of the car door 6a calculated by the second movement distance calculation means 18. That is, the door control unit 15 determines that the car doors 6a and 6b are fully closed if the movement distance calculated by the second movement distance calculation means 18 is equal to the distance L, and if shorter than the distance L, It is determined that the car doors 6a and 6b are not fully closed due to foreign matter being caught.

  As described above, since it is determined whether or not the car doors 6a and 6b are fully closed only in a minute range just before the end of the door closing operation, an abnormality caused by slipping of the belt due to acceleration, reopening, etc. occurs outside this range. The pulse count and the influence of noise can be ignored, and a more accurate elevator door device can be provided.

(Third embodiment)
The third embodiment is different from the above-described embodiment in that an abnormal inversion position storage device 19 is provided in the data processing unit 14. This makes it possible to avoid a situation in which the door-opening operation is repeated many times when dust or the like that does not interfere with the traveling of the elevator is caught.

  Hereinafter, this embodiment will be described.

  FIG. 7 is a block diagram showing control for preventing malfunction of the door device of the elevator. FIG. 7 is obtained by adding an abnormal inversion position storage device 19 to FIG.

  In the first embodiment and the second embodiment, the car doors 6a and 6b are fully closed even when the car doors 6a and 6b are clogged with garbage that does not interfere with the traveling of the elevator. It is expected that there will be repeated door opening operations.

  Therefore, as shown in FIG. 7, an abnormal reversal position storage for storing the positions of the car doors 6a and 6b when the pulse count is stopped at the position where the car doors 6a and 6b are not fully closed and the reversing door opening operation is performed. The device 19 is provided in the data processing unit 14 and the abnormal pulse value is stored in the abnormal inversion position storage device 19 to solve the above problem. That is, when the door closing operation is finished, the pulse value counted by the pulse generator 9 is an abnormal pulse value that is less than the reference pulse value, and when the car doors 6a and 6b perform the reverse door opening operation, the abnormal pulse is detected. The value is stored in the abnormal inversion position storage device 19. When a state in which the pulse value obtained at the end of another door closing operation after the reverse door opening coincides with the abnormal pulse value is detected a certain number of times, the door closing position storage device 17 uses the abnormal pulse value as a reference pulse value. The car doors 6a and 6b are considered to be fully closed, and the elevator travel is permitted. Here, the certain number of times means approximately 5 times or less. Therefore, the number of times of detection can be arbitrarily set by the administrator or the like as two times or three times.

  The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the technical idea described in the claims.

  That is, in the above embodiment, the reference pulse value stored in the door closing position storage device 17 is rewritten when the abnormal pulse value stored in the abnormal reversal position storage device 19 is subsequently detected a certain number of times. The door closing position storage device 17 may store the abnormal pulse value by itself.

  In the first and second embodiments, the pulse value counted while the car doors 6a and 6b are moved from the fully opened position to the fully closed position is used as the reference pulse value. However, it is assumed that the setting of the reference pulse value can be changed at any time, and the door closing position storage device 17 is not fixed to the data stored once.

  Specifically, when the output signal from the second door closing position detection means 8 is not turned on at the end of the door closing operation for a certain number of times, and the same pulse value is stored in the door closing position storage device 17 each time, The door control unit 15 determines that there is a small amount of dust that does not affect the elevator travel between the car doors 6a and 6b, rewrites the reference pulse value, fully closes the car doors 6a and 6b, and causes the elevator to travel. to approve.

  Other specific configurations can be changed as appropriate without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the case of the center open type is described for the car door, but the present invention can be similarly applied to a car door of a sliding door type (not shown).

DESCRIPTION OF SYMBOLS 1 ... Drive device 2 ... Header 3a, 3b ... Pulley 4 ... Belt 5a, 5b ... Door hanger 6a, 6b ... Car door 7 ... 1st door closing position detection means 8 ... 2nd door closing position detection means 9 ... Pulse Generator 10a, 10b ... Door safety 11a, 11b ... Link mechanism part 12a, 12b ... Safety support part 13a, 13b ... Sensor 14 ... Drive stop detection means 15 ... Door control part 16 ... First movement distance calculation means 17 ... Door closing Position storage device 18 ... second movement distance detecting means 19 ... abnormal inversion position storage device

Claims (6)

A drive for opening and closing the elevator car door;
A first door closing position that is provided above the car door and detects that the car door has reached a preset first door closing position at a position before the door closing end during the door closing operation. Detection means;
Second door closing position detecting means provided above the car door for detecting that the car door has reached the door closing end after detecting the first door closing position detecting means;
A door control unit that determines that the car door is fully closed only when both output signals from the first door closing position detecting means and the second door closing position detecting means are detected; ,
An elevator door device comprising: The door control unit is controlled by data from a data processing unit that processes an output signal from a pulse generator that generates a pulse value corresponding to a driving amount of the driving device,
The data processing unit
First moving distance calculating means for calculating a moving distance of the car door from the pulse value obtained between the door open end and the second door closing position detecting means by the pulse generator;
A door closing position storage device that updates the movement distance every time the first movement distance calculation means calculates and stores the movement distance;
The elevator door device according to claim 1, comprising: The door control unit is controlled by data from a data processing unit that processes an output signal from a pulse generator that generates a pulse value corresponding to a driving amount of the driving device,
The data processing unit
First moving distance calculating means for calculating a moving distance of the car door from the pulse value obtained between the door open end and the second door closing position detecting means by the pulse generator;
A door closing position storage device for storing the movement distance from the door opening end set in advance to the second door closing position detecting means;
The elevator door device according to claim 1, comprising: The door controller is
The movement distance calculated by the first movement distance calculation means during the door closing operation is compared with the movement distance stored in the door closing position storage device, and the car door is fully closed. The elevator door device according to claim 2, wherein it is determined whether or not there is. A drive for opening and closing the elevator car door;
A first door closing position that is provided above the car door and detects that the car door has reached a preset first door closing position at a position before the door closing end during the door closing operation. Detection means;
A second door closing position provided above the car door, wherein the car door reaches the door closing end after detecting the first door closing position detecting means and detects that the car door is fully closed. Detection means;
A door control unit that determines that the car door is fully closed only when both output signals from the first door closing position detecting means and the second door closing position detecting means are detected; With
The door control unit is controlled by data from a data processing unit that processes an output signal from a pulse generator that generates a pulse value corresponding to a driving amount of the driving device,
The data processing unit
From the position where the output signal of the first door closing position detecting means is detected until the output signal of the second door closing position detecting means is detected during the door closing operation of the car door, from the pulse generator A second moving distance calculating means for counting the obtained pulse value and calculating a moving distance from the first door closing position detecting means to the second door closing position detecting means;
The movement distance calculated by the second movement distance calculation means and a preset distance from the position of the first door closing position detection means to the position of the second door closing position detection means An elevator door device characterized by determining whether or not the car door is fully closed by comparison. The data processing unit further includes an abnormal inversion position storage device,
When it is determined that the car door is not fully closed at the end of the door closing operation of the car door, and the door control unit performs the door opening operation, the pulse value at the end of the door closing operation is set to the abnormal inversion position. When the state where the pulse value stored in the storage device and the pulse value at the end of the subsequent door closing operation coincides with the pulse value stored in the previous abnormal inversion position storage device continues for a certain number of times, 4. The stored pulse value is re-stored in the door closing position storage device, and a re-storing operation signal is output to the door control unit when re-storing occurs. The elevator door device described.

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