JP5271155B2 - Clearance measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clearance measuring device that does not change a target for measurement and a position of a camera even when a main rope or a governor rope is shortened or when a clearance is changed by adjusting the rope tension. <P>SOLUTION: The clearance measuring device measures a distance between a counterweight block mounted under a counterweight and a buffer as a counterweight clearance when the counterweight balanced with an elevator car and moving up and down by travel of a main rope is located at the lowest position. The clearance measuring device includes a camera provided on the elevator car for imaging the counterweight block and a measuring board for measuring the counterweight clearance by analyzing a captured image of the counterweight block. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a clearance measuring apparatus for measuring a clearance between an elevator counterweight and a shock absorber or a clearance between a governor rope tension wheel and a pit floor.

  As a device for managing the clearance related to the counterweight of the elevator, it is attached to the counterweight guide rail and the counterweight sensor for detecting the counterweight clearance between the counterweight and the counterweight buffer. Equipped with a counterweight detection piece that is detected by the counterweight sensor, the counterweight sensor is installed at the lower part of the hoistway, the final limit switch does not operate, and the counterweight is shorter than the counterweight clearance. It attached so that a detection piece could be detected (for example, refer patent document 1).

JP 2008-280101A

  However, when there is a discontinuous change in the balance weight clearance due to adjustment of the rope tension, there is a problem that it is necessary to change the position of the balance weight sensor, and the load on maintenance personnel is insufficiently reduced.

  The object of the present invention is to shorten the main rope or governor rope or adjust the rope tension to change the clearance discontinuously or not to change the measurement target or the camera position. A clearance measuring device is provided.

  The clearance measuring device according to the present invention comprises a balance weight block mounted under the balance weight and a shock absorber when the balance weight which is balanced with the elevator car and is moved up and down by the travel of the main rope is at the lowest position. In the clearance measuring apparatus for measuring the distance between the counterweights as a counterweight clearance, the counterweight clearance is determined by analyzing a camera that is disposed in the elevator car and shoots the counterweight block and the captured counterweight block image. And a measuring panel for measuring.

  The clearance measuring apparatus according to the present invention is a camera disposed on an elevator car, and captures as an image the lower end of the counterweight block that causes a change in the counterweight clearance, and changes the position of the lower end of the counterweight block by image analysis. When the change in the measured position exceeds a predetermined value, the balance weight clearance is adjusted by removing the balance weight block or shortening the main rope, so shorten the main rope or adjust the rope tension. Even if the counterweight clearance is changed, the camera position can be changed to the initial value so that the lower end of the counterweight block is at the center of the screen when it changes. The effect is that it is not necessary to change.

It is the schematic of the elevator apparatus which has arrange | positioned the clearance measuring apparatus which concerns on Embodiment 1 of this invention. It is an image which shows a mode that it image | photographed so that the lower end of a counterweight block might come to the center of the up-down direction of a screen in order to obtain | require the initial value of the position of an elevator car. It is an image which shows a mode that the lower end of the balance weight block was image | photographed when the elevator car was positioned in the initial value in order to obtain | require the change part of the balance weight clearance. It is a figure which shows a mode that marking was performed in the vicinity of the counterweight of the counterweight block. It is an image which shows a mode that it image | photographed so that the lower end of a counterweight block might come to the center of the up-down direction of a screen in order to obtain | require the initial value of the position of an elevator car. It is an image which shows a mode that the counterweight block was image | photographed when the elevator car was positioned to the initial value when the counterweight clearance greatly decreased. It is an image which shows a mode that it image | photographed so that the lower end of marking might come to the center of the up-down direction of a screen, in order to obtain | require the initial value of the position of an elevator car. It is an image which shows a mode that marking was image | photographed when the elevator car was positioned in the initial value in order to obtain | require the change part of a governor rope tension vehicle clearance.

Hereinafter, preferred embodiments of a clearance measuring device of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a schematic diagram of an elevator apparatus in which a clearance measuring apparatus according to Embodiment 1 of the present invention is arranged.
The clearance measuring apparatus according to the present invention is applied to an elevator apparatus to which general position control is performed. As shown in FIG. 1, the elevator apparatus includes an elevator car 1 on which passengers get on and off, a main rope 3 fixed at one end to the elevator car 1, a counterweight 4 fixed at the other end of the main rope 3, not shown. A hoisting machine 2 in which a rotational force is transmitted from a motor and a main rope 3 is wound, a governor rope 21 that travels in conjunction with the elevator car 1, a governor rope tensioning vehicle that applies tension to the governor rope 21 22 and a shock absorber 8 disposed in a pit 9 immediately below the counterweight 4 and an elevator control device 7 for controlling the elevator.

The main rope 3 has an elevator car 1 fixed at one end and a counterweight 4 fixed at the other end. And the elevator car 1 is raised / lowered by traveling the main rope 3 using the frictional force between the hoist 2 and the main rope 3. At that time, the counterweight 4 also moves up and down.
At least one counterweight block 6 is fixed to the lower end of the counterweight 4. Usually, the thickness of one counterweight block 6 is about 10 cm.

  When the elevator car 1 is stopped on the top floor, the counterweight 4 is lowered to the lowest position. The distance between the counterweight block 6 and the shock absorber 8 when the counterweight 4 is at the lowest position is referred to as a counterweight clearance. The counterweight block 6 is removed when the counterweight clearance becomes a predetermined value or less and increases the counterweight clearance by the thickness.

A clearance measuring apparatus 10 according to Embodiment 1 of the present invention is a measurement that measures a counterweight clearance based on an image including a camera 11 mounted on an elevator car 1 and a counterweight block 6 photographed by the camera 11. A board 12 is provided.
The position of the camera 11 is the same as the position of the elevator car 1 to which the camera 11 is attached. The position of the elevator car 1 is positioned by the elevator controller 7, and the value can be acquired from the elevator controller 7.
As described above, the counterweight clearance is the distance between the lower end 6a of the counterweight block 6 and the shock absorber 8 when the elevator car 1 is stopped on the top floor. Since it is the same as the change in the position of the lower end 6a of the counterweight block 6 when the elevator car 1 is stopped at an arbitrary position, the initial value of the position of the lower end 6a of the counterweight block 6 is obtained as follows. If you put it, you can measure the change.

When a new elevator is installed, when the main rope 3 is replaced, when the main rope 3 is shortened, or when the tension of the main rope 3 is changed, the counterweight clearance changes. Therefore, the elevator car 1 is stopped on the top floor, and the distance between the lower end 6a of the counterweight block 6 and the shock absorber 8 at this time is measured.
Next, the elevator controller 1 is instructed to ascend or descend the elevator car 1 so that the lower end 6a of the counterweight block 6 is positioned at the center in the vertical direction of the screen displaying the image taken by the camera 11 of the elevator car 1. To do.

  Then, as shown in FIG. 2, the position of the elevator car 1 when the lower end 6a of the counterweight block 6 is aligned with the center in the vertical direction of the screen using the image of the counterweight block 6 taken by the camera 11 is shown. Obtained from the elevator control device 7 and stored as an initial value A. In addition, the number of counterweight blocks 6 at this time is stored. Further, the thickness of the counterweight block 6 is measured and stored in advance, and the number of pixels corresponding to the thickness of the counterweight block 6 on the screen is measured. The measured number of pixels is stored as a block thickness pixel number.

Each time a predetermined clearance inspection period arrives, the elevator controller 7 is instructed to position the elevator car 1 at the stored initial value A. Then, as shown in FIG. 3, since the main rope 3 normally extends, the lower end 6a of the counterweight block 6 in the image of the counterweight block 6 taken by the camera 11 is the center in the vertical direction of the screen on which the image is displayed. Located below. Therefore, the distance α between the center in the vertical direction of the screen and the lower end 6a of the counterweight block 6 is measured based on the number of block thickness pixels.
When the distance α exceeds the thickness δ of one counterweight block, it is determined that the counterweight clearance needs to be adjusted. When the distance α is equal to or less than the thickness δ, the clearance adjustment procedure is terminated because it is not necessary to adjust the counterweight clearance.

  When it is determined that the counterweight clearance needs to be adjusted, it is determined whether the number of counterweight blocks 6 is one or more. If the number of counterweight blocks 6 is one or more, one counterweight block 6 is removed. So as to report. Further, the number of counterweight blocks 6 is decremented and stored as a new number of counterweight blocks 6. When the number of counterweight blocks 6 is 0, the main rope 3 is reported to be shortened.

  When it is notified that one counterweight block 6 is to be removed, one counterweight block 6 is removed and the clearance adjustment procedure is terminated. When it is notified that the main rope 3 is shortened, the main rope 3 is cut and shortened by a predetermined length. Then, the initial value of the counterweight clearance is measured and stored. Further, the number of added counterweight blocks 6 is stored.

As described above, in the clearance measuring apparatus 10, the lower end 6a of the counterweight block 6 that causes a change in the counterweight clearance is captured as an image by the camera 11 disposed on the elevator car 1, and the lower end of the counterweight block 6 is analyzed by image analysis. The change in the position 6a is measured, and when the measured change in the position exceeds a predetermined value, the balance weight clearance is adjusted by removing the balance weight block 6 or shortening the main rope 3. Even if the counterweight clearance is changed by shortening the length or adjusting the rope tension, the position of the camera 11 is changed so that the lower end 6a of the counterweight block 6 is at the center of the screen when changed. The position of the camera 11 related to the measurement need not be changed.
Moreover, since the current number of counterweight blocks 6 is stored, it is not necessary to manage this number separately.

Although the camera according to Embodiment 1 described above is disposed on the elevator car 1, it may be disposed below the elevator car 1, and the clearance can be measured in the same manner.
Further, although the balance weight clearance is adjusted by using the thickness of the balance weight block 6 as a unit, the present invention is not limited to this, and the unit may be appropriately determined.

Embodiment 2. FIG.
The clearance measuring device according to the second embodiment of the present invention is different from the clearance measuring device 10 according to the first embodiment of the present invention in the way of obtaining the change in the balance weight clearance, and the rest is the same. The same reference numerals are given to the portions, and the description is omitted.
In the clearance measuring apparatus according to the second embodiment of the present invention, the counterweight block 6 is placed at the center in the vertical direction of the screen on which the elevator car 1 displays an image taken by the camera 11 every time a predetermined clearance inspection period arrives. The elevator controller 1 is commanded to raise or lower the elevator car 1 so that the lower end 6a is positioned.

The position of the elevator car 1 when the lower end 6a of the counterweight block 6 is aligned with the center in the vertical direction of the screen is acquired from the elevator controller 7 using an image including the counterweight block 6 photographed by the camera 11. The current value B is used. Then, the change Δ is obtained by subtracting the current value B from the stored initial value A.
Then, when twice the change Δ exceeds the thickness δ of one counterweight block, it is determined that the counterweight clearance needs to be adjusted. Further, when twice the change Δ is equal to or less than the thickness δ, the clearance adjustment procedure is terminated because it is not necessary to adjust the counterweight clearance.

In this way, in the clearance measuring apparatus, the camera 11 disposed on the elevator car 1 captures the lower end 6a of the counterweight block 6 that causes the change in the counterweight clearance as an image, and the image analysis analyzes the lower end 6a of the counterweight block 6. When the position of the elevator car 1 is controlled so that the position of the car is at the center of the screen, the change in the balance weight clearance is measured from the change in the position of the elevator car 1, and the change in the balance weight balance exceeds a predetermined value Since the balance weight clearance is adjusted by removing the balance weight block 6 or shortening the main rope 3, even if the balance weight clearance is changed by shortening the main rope 3 or adjusting the rope tension. When the camera 11 changes, the lower end 6a of the counterweight block 6 comes to the center of the screen. It may be determined initial value and the current value by changing the location may not change the position of the camera 11 according to the measurement.
Embodiment 3 FIG.
The clearance measuring apparatus according to the third embodiment of the present invention differs from the clearance measuring apparatus 10 according to the first embodiment of the present invention in that the method for obtaining the change in the counterweight clearance is the same, and the rest is the same. Are denoted by the same reference numerals and description thereof is omitted.
As shown in FIG. 4, the counterweight block 6 of the elevator apparatus according to Embodiment 3 of the present invention is marked on a part of the side surface with a color different from the color of the other part. And the part 6c to which the marking is applied is from the upper end 6b of the counterweight block 6 to the lower limit where the counterweight clearance becomes smaller when the counterweight 4 is further lowered.

When a new elevator is installed, when the main rope 3 is replaced, when the main rope 3 is shortened, or when the tension of the main rope 3 is changed, the counterweight clearance changes. Therefore, the elevator car 1 is stopped on the top floor, and the distance between the lower end 6a of the counterweight block 6 and the shock absorber 8 at this time is measured.
Next, the elevator controller 1 is instructed to raise or lower the elevator car 1 so that the lower end 6a of the counterweight block 6 comes to the center in the vertical direction of the screen displaying the image taken by the camera 11 of the elevator car 1. .

  Then, the position of the elevator car 1 when the lower end 6a of the counterweight block 6 is aligned with the vertical center of the screen is acquired from the elevator controller 7 using the image of the counterweight block 6 taken by the camera 11. Store as initial value A.

When a predetermined clearance inspection period has elapsed, the elevator controller 7 is instructed so that the elevator car 1 is positioned at the stored initial value A. Then, since the main rope 3 usually extends, the lower end 6a of the counterweight block 6 is positioned below the center in the vertical direction of the screen on which the image is displayed in the image of the counterweight block 6 taken by the camera 11.
If the elongation is small even if the main rope 3 is extended, the marking portion 6c of the counterweight block 6 is not included in the center in the vertical direction of the screen as shown in FIG. On the other hand, when the extension of the main rope 3 is large, there is a marking portion 6c of the counterweight block 6 at the center in the vertical direction of the screen as shown in FIG.

  And when the marking part 6c of the counterweight block 6 exists in the center of the up-down direction of a screen, it judges that adjustment of a counterweight clearance is required. Further, when the marking portion 6c of the counterweight block 6 is hooked on the center in the vertical direction of the screen, the clearance adjustment procedure is terminated because it is not necessary to adjust the counterweight clearance.

  Thus, marking is performed in the vicinity of the counterweight 4 of the counterweight block 6 and it is determined that the counterweight clearance needs to be adjusted when the marking portion 6c is placed at the center in the vertical direction of the screen. The configuration of the measuring panel can be simplified.

Embodiment 4 FIG.
Although the clearance measuring apparatus according to the first to third embodiments has been described with respect to the counterweight clearance, a clearance measuring apparatus that measures the governor rope tensioner clearance will be described in the fourth embodiment.
Usually, the distance between the governor rope tensioning vehicle 22 and the hoistway pit floor 23 is referred to as the governor rope tensioning vehicle clearance.

A clearance measuring apparatus 10B according to Embodiment 4 of the present invention includes a camera 11 mounted on the elevator car 1, a marking 24 provided on the governor rope 21, and a marking 24 photographed by the camera 11. And a measuring panel 25 for measuring the clearance of the governor rope tension vehicle based on the image.
The position of the camera 11 is the same as the position of the elevator car 1 to which the camera 11 is attached. The position of the elevator car 1 is positioned by the elevator controller 7, and the value can be acquired from the elevator controller 7.
Since the governor rope tension car clearance may be located anywhere in the elevator car 1, the change in the governor rope tension car clearance is the speed governor rope tension when the elevator car 1 is stopped at an arbitrary position. This is a change in the distance between the vehicle 22 and the hoistway pit floor 23 and is the same as the change in the position of the marking 24 provided on the governor rope 21.
Therefore, if the initial value of the position of the marking 24 is obtained as follows, the amount of change can be measured.

When the elevator is newly installed, the governor rope 21 is replaced, the governor rope 21 is shortened, the tension of the governor rope 21 is changed, etc., the clearance of the governor rope tension changes. To do.
Therefore, the elevator car 1 is stopped at an arbitrary position, and the distance between the governor rope tensioning wheel 22 and the hoistway pit floor 23 at this time is measured.
Next, the elevator controller 1 is instructed to ascend or descend the elevator car 1 so that the lower end 24a of the marking 24 is positioned at the center in the vertical direction of the screen displaying the image taken by the camera 11 of the elevator car 1.

  Then, using the image of the marking 24 photographed by the camera 11, the position of the elevator car 1 when the lower end 24a of the marking 24 is aligned with the center in the vertical direction of the screen is acquired from the elevator control device 7 as an initial value C. Remember. Further, the length of the marking 24 is measured and stored in advance, and the number of pixels corresponding to the length of the marking 24 on the screen is measured. The measured number of pixels is stored as the number of marking length pixels.

Every time a predetermined clearance inspection period arrives, the elevator controller 7 is instructed to position the elevator car 1 at the stored initial value C. Then, since the governor rope 21 is normally extended, the lower end 24a of the marking 24 is positioned below the vertical center of the screen on which the image is displayed in the image of the marking 24 photographed by the camera 11. Therefore, the distance β between the center in the vertical direction of the screen and the lower end 24a of the marking 24 is measured based on the number of marking length pixels.
When the distance β exceeds a predetermined value, it is determined that adjustment of the governor rope tension vehicle clearance is necessary. When the distance β is equal to or smaller than a predetermined value, the clearance adjustment procedure is terminated because it is not necessary to adjust the governor rope tension vehicle clearance.

When it is determined that adjustment of the clearance of the governor rope tension vehicle is necessary, a notification is issued to shorten the governor rope 21.
When it is notified that the governor rope 21 is shortened, the governor rope 21 is cut and shortened by a predetermined length. Then, the initial value C is measured and stored.

  Thus, in the clearance measuring apparatus 10B, the governor rope related to the position of the governor rope tensioning vehicle 22 that is a factor that changes the clearance of the governor rope tensioning vehicle with the camera 11 disposed on the elevator car 1. The marking 24 provided on the marking 21 is captured as an image, the change in the position of the lower end 24a of the marking 24 is measured by image analysis, and the governor rope 21 is shortened when the measured change in the position exceeds a predetermined value. Therefore, even if the governor rope 21 is shortened or the rope tension is adjusted to change the clearance of the governor rope tension vehicle, the lower end 24a of the marking 24 changes to the center of the screen. The position of the camera 11 may be changed to an initial value so that the position of the camera 11 related to the measurement does not need to be changed.

  Note that the position of the elevator car 1 positioned so that the lower end 24a of the marking 24 photographed when the governor rope 21 is new, updated or shortened is positioned at the center in the vertical direction of the screen is the initial value. The position of the elevator car 1 positioned so that the lower end 24a of the marking 24 photographed every time a predetermined period arrives is located at the center in the vertical direction of the screen is obtained as the current value, and the initial value and the current value You may obtain | require 2 times the difference with this as a change part of a governor rope tension vehicle clearance.

  1 Elevator car, 2 hoisting machine, 3 main rope, 4 counterweight, 6 counterweight block, 6a lower end of counterweight block, 6b upper end of counterweight block, 6c marking part, 7 elevator control device, 8 Shock absorber, 9 pits, 10 and 10B clearance measuring device, 11 camera, 12 measuring panel, 21 governor rope, 22 governor rope tension wheel, 23 hoistway pit floor, 24 marking, 24a (marking) lower end, 25 Measuring board.

Claims (5)

Measures the distance between the counterweight block mounted under the counterweight and the shock absorber as the counterweight clearance when the counterweight is balanced with the elevator car and moved up and down by the travel of the main rope. In the clearance measuring device to
A camera arranged in the elevator car and photographing the counterweight block;
A measuring board for measuring the counterweight clearance by analyzing the image of the counterweight block taken;
With
The measuring board is
The position of the elevator car positioned so that the lower end of the counterweight block, which is photographed when the main rope is new, updated or shortened, is positioned at the center in the vertical direction of the screen is obtained as an initial value.
Predetermined torque clearance measuring device obtains the elevator car every time period arrives as change in the counterweight clearance change in the position of the lower end of the counterweight block with positioning to the initial value. Measures the distance between the counterweight block mounted under the counterweight and the shock absorber as the counterweight clearance when the counterweight is balanced with the elevator car and moved up and down by the travel of the main rope. In the clearance measuring device to
A camera arranged in the elevator car and photographing the counterweight block;
A measuring board for measuring the counterweight clearance by analyzing the image of the counterweight block taken;
With
The measuring board is
The position of the elevator car positioned so that the lower end of the counterweight block, which is photographed when the main rope is new, updated or shortened, is positioned at the center in the vertical direction of the screen is obtained as an initial value.
The initial value and the current value are obtained as the current value of the position of the elevator car, which is positioned so that the lower end of the counterweight block, which is photographed every time a predetermined period arrives, is positioned at the center in the vertical direction of the screen. torque clearance measuring device obtains a 2-fold difference as the variation of the counterweight clearance between. Measures the distance between the counterweight block mounted under the counterweight and the shock absorber as the counterweight clearance when the counterweight is balanced with the elevator car and moved up and down by the travel of the main rope. In the clearance measuring device to
A camera arranged in the elevator car and photographing the counterweight block;
A measuring board for measuring the counterweight clearance by analyzing the image of the counterweight block taken;
With
The counterweight block is marked in the vicinity of the counterweight,
The measuring board is
The position of the elevator car positioned so that the lower end of the counterweight block, which is photographed when the main rope is new, updated or shortened, is positioned at the center in the vertical direction of the screen is obtained as an initial value.
When the predetermined period comes, the elevator car is positioned at the initial value, and when the marked portion of the counterweight block is positioned at the center in the vertical direction of the screen, the lower end of the counterweight block has a lower limit. torque clearance measurement device be determined that the cut was. In the clearance measurement device that measures the distance between the governor rope tensioning vehicle and the pit floor that applies tension to the governor rope that runs in conjunction with the elevator car as the governor rope tensioning vehicle clearance,
The governor rope is marked,
A camera that is placed in the elevator car and shoots the markings made;
A measuring panel for measuring the governor rope tension vehicle clearance by analyzing the image of the marking taken,
With
The measuring board is
The position of the elevator car positioned so that the lower end or upper end of the marking taken when the governor rope is new, renewed or shortened is positioned at the center in the vertical direction of the screen as an initial value Seeking
Predetermined torque clearance measuring device obtains the elevator car every time period arrives as change in the speed governor rope tension wheel clearance change in the position of the lower end or upper end of the marking as well as positioning the initial value. In the clearance measurement device that measures the distance between the governor rope tensioning vehicle and the pit floor that applies tension to the governor rope that runs in conjunction with the elevator car as the governor rope tensioning vehicle clearance,
The governor rope is marked,
A camera that is placed in the elevator car and shoots the markings made;
A measuring panel for measuring the governor rope tension vehicle clearance by analyzing the image of the marking taken,
With
The measuring board is
The position of the elevator car positioned so that the lower end or upper end of the marking taken when the governor rope is new, renewed or shortened is positioned at the center in the vertical direction of the screen as an initial value Seeking
The initial value and the current value are obtained as the current value of the position of the elevator car that is positioned so that the lower end or the upper end of the marking, which is taken every time a predetermined period arrives, is located in the center in the vertical direction of the screen. torque clearance measurement device required twice as much as the amount of change in the speed governor rope-covered car clearance of the difference between the.

Images