JP5527475B2 - Elevator control device - Google Patents

Description

  The present invention relates to an elevator control device that employs a traction drive system.

Patent Documents 1 and 2 below disclose techniques related to elevator car position detection.
In the thing of patent document 1, the cam switch is installed in the elevator car. This cam switch operates when a car enters the upper end or lower end of the hoistway, and outputs a signal corresponding to the car position. For this reason, for example, even when slip occurs between the main rope and the sheave, the car position can be reliably detected at the end of the hoistway.

  In the thing of patent document 2, the position code is displayed over the upper and lower sides of the elevator hoistway. The position code is read by a camera installed in the elevator car to detect the car position.

Japanese Unexamined Patent Publication No. 7-223783 Japanese Unexamined Patent Publication No. 2005-126164

  The device described in Patent Document 1 has a problem that installation and position adjustment of the cam switch requires a lot of labor and time, and the installation accuracy varies depending on the skill of the operator. There is also a problem that noise is generated when the cam switch operates.

  On the other hand, in the thing of patent document 2, although there is no worry of noise, others generate the same problem as patent document 1. In particular, since it is necessary to install a member for displaying the position code over the hoistway, the cost of the elevator with a long hoisting stroke is greatly increased.

  This invention has been made to solve the above-described problems, and its purpose is to greatly simplify the labor of installation and adjustment, and regardless of the skill of the operator who performs installation and adjustment. An elevator control device capable of detecting a car position with high accuracy is provided.

  An elevator control device according to the present invention includes an encoder that detects rotation of an elevator sheave, first position detection means that detects a current position of an elevator car based on a detection result of the encoder, and an end of a hoistway An image display unit that displays an image representing predetermined position information, an image detection unit that detects an image displayed on the image display unit, and a detection result of the image detection unit. An image for adjusting the position of the image displayed on the image display unit based on the second position detecting means for detecting the current position of the car and the car position detected by the first position detecting means and the second position detecting means. And a writing unit.

  An elevator control apparatus according to the present invention includes an encoder that detects rotation of an elevator sheave, first position detection means that detects a current position of an elevator car based on a detection result of the encoder, and a hoistway An image display unit for displaying an image representing predetermined position information, an image detection unit for detecting an image displayed on the image display unit, and a detection result of the image detection unit. Based on second position detecting means for detecting the current position of the car and control means for controlling the operation of the car based on the car position detected by the first position detecting means and the second position detecting means. The image display unit can change the display position of an image from a device when a predetermined device is connected, and can retain display contents even when power is not supplied A.

  According to the present invention, the labor of installation and adjustment can be greatly simplified, and the car position can be detected with high accuracy regardless of the skill of the operator who performs installation and adjustment.

It is a block diagram which shows the control apparatus of the elevator in Embodiment 1 of this invention. It is a figure for demonstrating the function of the control apparatus shown in FIG. It is a flowchart which shows operation | movement of the control apparatus of the elevator in Embodiment 1 of this invention.

  In order to explain the present invention in more detail, it 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.
FIG. 1 is a block diagram showing an elevator control apparatus according to Embodiment 1 of the present invention.
In FIG. 1, 1 is an elevator hoistway, 2 is an elevator car, and 3 is a counterweight. The car 2 and the counterweight 3 are suspended in a fishing bottle type in the hoistway 1 by the main rope 4.

  5 is a sheave of a hoisting machine composed of an elevator drive device, and 6 is a motor of the hoisting machine. A part of the main rope 4 is wound around the sheave 5. The car 2 moves up and down in the hoistway 1 in the direction corresponding to the moving direction of the main rope 4 as the main rope 4 moves in the longitudinal direction in conjunction with the rotation of the sheave 5. That is, FIG. 1 shows an elevator that employs a traction drive system. The counterweight 3 moves up and down in the hoistway 1 in the opposite direction to the car 2.

  Reference numeral 7 denotes a guide rail for guiding the raising and lowering of the car 2. The guide rail 7 is vertically installed in the hoistway 1. 8 is a braking device, and 9 is an encoder. The braking device 8 and the encoder 9 may be configured as a part of the hoisting machine.

The braking device 8 is for holding the car 2 stationary. The braking device 8 operates when the car 2 is stopped, and prevents the sheave 5 from rotating.
The encoder 9 is for detecting the rotation of the sheave 5. For example, the encoder 9 is installed on the shaft of the sheave 5 and outputs a signal corresponding to the rotation direction and the rotation angle of the sheave 5.

  The signal output from the encoder 9 is input to the elevator control panel 10. The control panel 10 includes position detection circuits 11 and 12 and a control circuit 13. The position detection circuit 11 detects the current position (car position) of the car 2 based on the signal (detection result) from the encoder 9. The function of the position detection circuit 11 may be provided in the encoder 9 itself. In such a case, the position information indicating the car position is input from the encoder 9 to the control panel 10.

  As described above, the encoder 9 outputs a signal corresponding to the rotation of the sheave 5. For this reason, when a slip occurs between the main rope 4 and the sheave 5, the car position detected by the position detection circuit 11 deviates from the actual car position. On the other hand, when the elevator car 2 approaches the terminal end (upper end / lower end) of the hoistway 1, in order to avoid collision of the car 2, control such as deceleration and stop must be performed at an appropriate timing. For this reason, the elevator is provided with car position detection means in addition to the means comprising the encoder 9 and the position detection circuit 11.

  The car position detecting means is for accurately detecting the presence of the car 2 at the terminal end (upper end / lower end) of the hoistway 1. The car position detection means is configured by the image display units 14 and 15, the image detection unit 16, the position detection circuit 12, and the control circuit 13.

  The image display units 14 and 15 are for displaying an image representing predetermined position information. As the image display units 14 and 15, for example, electronic paper is used. By configuring the portion for displaying the image with electronic paper, the display content (image) and display position can be arbitrarily changed. In addition, with electronic paper, display content can be held for a long time even when power is not supplied.

  The image display unit 14 is provided at the upper end of the hoistway 1. The image display unit 14 is fixed to the upper end portion of the guide rail 7 via the support arm 17, for example. The image display unit 15 is provided at the lower end of the hoistway 1. For example, the image display unit 15 is fixed to the lower end of the guide rail 7 via the support arm 18. The image display units 14 and 15 are arranged such that the display surface for displaying the image faces the car 2 side along the ascending / descending direction of the car 2.

  The image detection unit 16 is for detecting images displayed on the image display units 14 and 15. The image detection unit 16 is provided in the car 2. The image detection unit 16 is arranged to face the image display unit 14 when the car 2 reaches a predetermined upper position. That is, when the car 2 reaches the upper position, the image displayed on the image display unit 14 is detected by the image detection unit 16. When detecting the image on the image display unit 14, the image detection unit 16 outputs the detection result (image information) to the control panel 10. Similarly, the image detection unit 16 is disposed so as to face the image display unit 15 when the car 2 reaches a predetermined lower position. When the car 2 reaches the lower position, the image displayed on the image display unit 15 is detected by the image detection unit 16. When detecting the image on the image display unit 15, the image detection unit 16 outputs the detection result (image information) to the control panel 10.

  The position detection circuit 12 of the control panel 10 detects the current position of the car 2 based on information (detection result) from the image detection unit 16. For example, the position detection circuit 12 analyzes the image information transmitted from the image detection unit 16 and compares it with already registered information, and determines whether the car 2 is in the upper position or the lower position. The function of the position detection circuit 12 may be provided in the image detection unit 16 itself. In such a case, position information indicating the position of the car is input from the image detection unit 16 to the control panel 10.

  The control circuit 13 controls the operation of the car 2 based on a car position detected by the position detection circuit 11 and a signal from a landing switch (not shown) during normal operation. Further, the control circuit 13 changes the operation of the car 2 based on the car position detected by the position detection circuit 12. For example, when the position detection circuit 12 detects that the car 2 is at a predetermined upper position or a lower position, the control circuit 13 performs control such as deceleration and stop at an appropriate timing.

  Next, a method for appropriately displaying an image representing position information on the image display units 14 and 15 will be described with reference to FIGS. 2 is a diagram for explaining the function of the control device shown in FIG. 1, and FIG. 3 is a flowchart showing the operation of the elevator control device according to the first embodiment of the present invention.

  Reference numeral 19 shown in FIG. 1 denotes an image writing unit for displaying images on the image display units 14 and 15 and adjusting the display position of the images. The image writing unit 19 is connected to the control panel 10 and the image display units 14 and 15 when it is necessary to write images to the image display units 14 and 15, for example, during elevator installation or maintenance.

  The image representing the predetermined position information must be displayed at a position (height) necessary for changing the operation of the car 2 in order to ensure safe operation of the elevator. For example, when the image detection unit 16 detects the image displayed on the image display unit 14 (or 15) and before the operation change (for example, deceleration / stop) of the car 2 is started by the control circuit 13, the position The time required for calculation by the detection circuit 12 and the control circuit 13 elapses. For this reason, in order to accurately detect the car position at the end portion of the hoistway 1, the image display units 14 and 15 must display the image in consideration of calculation delays by the position detection circuit 12 and the control circuit 13. I must. In addition, in order to reliably detect the image by the image detection unit 16, the length of the image (the width in the up-and-down direction of the car 2) is also required to some extent.

  Specifically, if the distance from the height of the terminal floor to the end on the intermediate floor side of the image is B, the distance B can be expressed by the following equation (see FIG. 2).

here,
A: Distance from the height of the terminal floor to the height at which the car 2 is desired to be detected Δt ₁ : Calculation delay of the position detection circuit 12 Δt ₂ : Calculation delay of the control circuit 13 v: Traveling speed of the car 2. For example, the image writing unit 19 displays an image representing position information between the height B and the height A calculated by the above formula 1, taking into account the calculation delays Δt ₁ and Δt ₂ . The image displayed on the image display units 14 and 15 may be a simple image such as a barcode shown in FIG.

A specific display setting method of the image is as shown in FIG.
At the time of installation of the elevator, after attaching necessary devices such as a hoisting machine and image display units 14 and 15, the image writing unit 19 is connected to the control panel 10 and the image display units 14 and 15. The image writing unit 19 causes the image display units 14 and 15 to display an image representing predetermined position information.

  Next, the car 2 is reciprocated between the top floor and the bottom floor. Specifically, first, the car 2 is caused to travel downward and stopped at the lowest floor (S101). Next, the car 2 is caused to travel upward and stopped on the top floor (S102). Further, the car 2 is moved downward and stopped at the lowest floor (S103).

  While the car 2 reciprocates in S101 to S103, the position detection circuits 11 and 12 in the control panel 10 detect the car position based on the input information. The control circuit 13 compares the car position detected by the position detection circuit 11 with the car position detected by the position detection circuit 12, and calculates the display position error of the images displayed on the image display units 14 and 15. . When calculating the display position error, the control circuit 13 transmits the calculation result (error) to the image writing unit 19 (S104). The image writing unit 19 adjusts (changes) the positions of the images displayed on the image display units 14 and 15 based on the error calculated by the control circuit 13 so that the display position of the image satisfies the above expression 1. (S105).

  For example, when the elevator is installed, it can be confirmed that no slip has occurred between the main rope 4 and the sheave 5 when the car 2 reciprocates. For this reason, the image writing unit 19 adjusts the position of the images displayed on the image display units 14 and 15 with reference to the car position detected by the position detection circuit 11.

  Note that the processing in S104 may be performed in the image writing unit 19. In this case, the car position detected by the position detection circuit 11 and the car position detected by the position detection circuit 12 are input to the image writing unit 19.

  When the image display position is appropriately set, the image writing unit 19 is removed from the control panel 10 and the image display units 14 and 15.

  If it is a control apparatus which has the said structure, in the terminal part of the hoistway 1, it will become possible to detect a cage position with high precision. The detection accuracy is not affected by the skill of the operator who performs installation or adjustment. In addition, since the position adjustment of the image can be performed after the image display units 14 and 15 are installed, the labor of installation and adjustment can be greatly simplified.

  If electronic paper is used as the image display units 14 and 15, the display content can be held even without power supply, and thus the maintenance cost after image setting can be reduced. Further, since the display contents and display positions of the image display units 14 and 15 cannot be changed unless the image writing unit 19 is connected, mischief and malfunction can be prevented. Further, if the image writing unit 19 is configured to be detachable, it is not necessary to install the image writing unit 19 in each elevator. For this reason, the said function is realizable at low cost.

  When a plurality of images are displayed on the image display unit 14, if the display position of one image can be set appropriately, the display position of the other image is easily set in relation to the one image. be able to. The same applies to the image display unit 15.

  The control device according to the present invention can be applied to an elevator having a function of detecting a car position at a terminal portion of a hoistway.

DESCRIPTION OF SYMBOLS 1 Hoistway 2 Car 3 Balance weight 4 Main rope 5 Sheave 6 Motor 7 Guide rail 8 Braking device 9 Encoder 10 Control panel 11, 12 Position detection circuit 13 Control circuit 14, 15 Image display part 16 Image detection part 17, 18 Support Arm 19 Image writer

Claims (5)

An encoder for detecting the rotation of the elevator sheave;
First position detecting means for detecting the current position of the elevator car based on the detection result of the encoder;
An image display unit provided at the end of the hoistway and displaying an image representing predetermined position information;
An image detection unit that is provided in the cage and detects an image displayed on the image display unit;
Second position detection means for detecting a current position of the car based on a detection result of the image detection unit;
An image writing unit for adjusting a position of an image displayed on the image display unit based on a car position detected by the first position detecting unit and the second position detecting unit;
Elevator control device with.   The elevator control device according to claim 1, wherein the image display unit includes an electronic paper as a part for displaying an image, and the display content can be held even when power is not supplied. Control means for changing the operation of the car based on the car position detected by the second position detecting means;
Further comprising
The image writing unit takes into account the passage of time from when the image detection unit detects the image displayed on the image display unit to when the control means starts changing the operation of the car. The elevator control device according to claim 1 or 2, wherein adjustment is performed. An encoder for detecting the rotation of the elevator sheave;
First position detecting means for detecting the current position of the elevator car based on the detection result of the encoder;
An image display unit provided at the end of the hoistway and displaying an image representing predetermined position information;
An image detection unit that is provided in the cage and detects an image displayed on the image display unit;
Second position detection means for detecting a current position of the car based on a detection result of the image detection unit;
Control means for controlling the operation of the car based on the car position detected by the first position detecting means and the second position detecting means;
With
The image display unit can change a display position of an image from the device when a predetermined device is connected, and can hold display contents even when power is not supplied. Elevator control device.   The elevator control device according to claim 4, wherein the image display unit includes an electronic paper in a portion for displaying an image.

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