JPH034842B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a centering detection device for elevator installation using a laser beam.

During elevator installation work, many parts must be installed in the hoistway with a certain degree of precision, so it is necessary to set a standard for centering each of these parts.

As shown in FIG. 1, conventional centering standard setting involves fixing a pedestal 3 to the top of the hoistway 1 using mounting brackets 2a, 2b, attaching upper templates 4a, 4b, 4c to this pedestal 3, Upper templates 4a, 4b, 4c measured from the architectural reference core
Piano wires 9a, 9b, 9c to which weights 8a, 8b, 8c are attached are suspended from predetermined positions. Further, a pedestal 6 is fixed to the lower part of the hoistway 1 using mounting brackets 5a and 5b. And the piano wires 9a, 9
After the rocking of b, 9c has stopped, place the lower templates 7a, 7b, 7c on the pedestal 6, align them with the piano wires 9a, 9b, 9c, and then piano wire 9
Fix a, 9b, and 9c. Thereafter, each piece of equipment was installed based on the piano wires 9a, 9b, and 9c.

However, with the above conventional method, when the piano wire is hung down, it takes a long time for the piano wire to stop swinging, and the piano wire may come into contact with the piano wire and swing, or the piano wire may swing during work. In some cases, the piano wire was cut and the piano wire had to be hung again.

Therefore, recently, a method has been proposed in which centering is performed using a laser beam instead of a piano wire. In this method, two reference points measured from the architectural reference center are set at the top and bottom of the hoistway, and the mounting position and angle of the oscillator are adjusted so that the laser beam emitted from the laser oscillator passes through the two reference points. This is to adjust the However, with this method, in order to perform centering with a certain degree of accuracy, it is necessary to increase the distance between the two reference points, so it is necessary to install an oscillator in order to pass the laser beam through the two reference points. The drawback was that it was difficult to adjust the position and angle.

Therefore, a device that emits a laser beam in a vertical direction has been considered, but since conventional devices emit a laser beam upward from the bottom of the hoistway, the position of the laser beam must be determined when installing each piece of equipment. When checking, the operator must look through the bottom of the sight, which has the disadvantage of poor work efficiency.

The present invention has been made in view of the above points, and is a centering method that facilitates elevator installation work by irradiating a laser beam emitted from a laser oscillator vertically downward from the top of the hoistway with high precision. The purpose is to provide a detection device.

An embodiment of the laser centering detection device according to the present invention will be described below with reference to FIG. In the figure, 10
is a laser oscillator; 11 is a collimator lens attached to the laser oscillator 10;
This is to constrict the laser beam emitted from zero and output it as a laser beam with a narrow optical axis diameter. 12 is a reflector for reflecting the laser beam in a direction (Z direction in FIG. 2) perpendicular to the direction of incidence (X direction in FIG. 2); 13 and 14 are horizontal angles (Z direction) of the reflector 12;
These are adjustment knobs for adjusting the angle of rotation around the axis) and the angle of elevation (angle of rotation around the Y axis), and each of the above devices is provided on the movable base 15. 16 and 17 are movable bases 15 relative to the base 18
This is an adjustment knob that adjusts the relative position of the front and back and left and right.

Reference numeral 20 denotes a detection device that detects the error in the vertical direction of the laser beam reflected downward by the reflecting mirror 12. This detection device 20 is movable in the left and right directions with respect to the base 18 by means of a handle 21. It's summery. 22 is a display device that displays the error of the laser beam detected by the detection device 20, and each of these devices is provided above the hoistway. 23 is a sight provided at the bottom of the hoistway.

FIG. 3 is a central longitudinal sectional view of the detection device 20.
In the figure, 30 is a detection tube forming the main body of the detection device 20, 31 and 32 are holders for suspending the detection device 20 so that its center axis coincides with the vertical direction, and the auxiliary tube 31a is the base. The detection tube 30 is suspended from the stand 18 so as to be freely rotatable in the front and rear directions of the paper using the holder 31 as a fulcrum, and the detection tube 30 is connected to the auxiliary tube
The auxiliary tube 31a and the detection tube 3 are suspended from the holder 32 so that they can freely rotate in the left and right directions in the drawing with the holder 32 as a fulcrum.
0 with respect to each central axis, the detection tube 30 is configured to be suspended with its central axis directed in the vertical direction.

33 and 34 are beam splitters that separate the laser beams, 35 and 36 are upper light detection arrays that detect the separated laser beams, 37 is a concave lens, and 38
is the lower photodetector array.

Next, a method of irradiating a laser beam vertically downward using this apparatus will be explained. The laser beam reflected downward by the reflecting mirror 12 is transmitted to the detection device 2.
A part of the light is split by beam splitters 33 and 34 in 0 and reaches the upper photodetection array 35 and 36, and the other part passes through the concave lens 37 and reaches the lower photodetection array 38.
reach.

As shown in FIG. 4, the upper photodetection arrays 35 and 36 are 4-division arrays having a light receiving surface on which four photodetection elements are arranged, and detect the incident direction of the laser beam to display the display device 22. to be displayed. The installation worker looks at this display and adjusts each of the above-mentioned adjustment knobs so that the incident direction of the laser beam is vertical, that is, coincides with the central axis of the detection tube 30.

Note that if there is only one set of beam splitter and upper photodetection array, even if the laser beam is off the center axis, it may hit the center of the upper photodetection array, so in this example two sets are used. It is set up.

With the above adjustment, the laser beam almost coincides with the central axis of the detection tube 30, but if a slight error A occurs, the error A is magnified to B by the concave lens 37 and reaches the lower photodetection array 38. As shown in FIG. 5, the lower photodetection array 38 has a light receiving surface on which a large number of photodetection elements are arranged, detects the deviation of the laser beam from the central axis, and displays the detected deviation on the display device 22. The installation worker looks at this display and further adjusts each adjustment knob so that the incident direction of the laser beam coincides with the central axis.

Note that if the detection tube 30 is long and the laser beam hits the inner wall of the detection tube 30 and is reflected before hitting the concave lens 38, a regular pattern will appear on the lower light detection array 38 as the incident angle changes. .
For example, if the detection tube 30 is made of brass, it will have an annular pattern as shown in FIG. In this case as well, by adjusting each adjustment knob, the pattern is erased to form a spot and then aligned with the center axis.

Next, a method for centering an elevator using the laser centering device of this embodiment will be explained.

The above laser centering device is installed on the top of the hoistway, and
Sights 23 are set at predetermined positions measured from the architectural reference center at the bottom of the hoistway.

Next, after aligning the laser beam with the vertical direction as described above, the detection device 20 is moved to the left or right using the handle 21 to a position where the laser beam does not hit, and the collimator lens 11 is removed. , Aim 23 by irradiating the laser beam vertically downward.
Apply to. At this time, if the laser beam does not match the sight 23, the adjustment knobs 16 and 17 move the laser centering device horizontally to bring the laser beam into line with the sight 23. In this case, by using a telescope to confirm whether or not the laser beam has hit the sight 23, all work can be carried out above the hoistway.

After centering as described above, each piece of equipment in the hoistway is installed using this laser beam as a reference.

By the way, in general, in elevator installation work, two or more standards (piano wires or laser beams) are set in order to eliminate errors in mutual spacing between devices and twists during installation. Next, an embodiment of an apparatus for simultaneously irradiating two laser beams will be described with reference to FIG. 7.

In the figure, 40 is a beam splitter, and 41 is an adjustment knob that adjusts the relative position of the reflecting mirror 12 with respect to the movable table 15 in the left-right direction, and is used to adjust the distance between the beam splitter 40 and the reflecting mirror 12. Note that the same reference numerals as in FIG. 2 indicate the same parts. Similarly, it is also possible to simultaneously irradiate three or more laser beams in a vertically downward direction.

FIG. 8 also shows another embodiment of the present invention, in which the beam splitters 33, 34 and the upper photodetection arrays 35, 36 in the detection device 20 shown in FIG.
Instead, as shown in FIG.
1 is arranged so as to be perpendicular to the central axis of the detection tube 30.

Furthermore, in the embodiment shown in FIG. 3, a convex lens with a short focal length may be used instead of the concave lens 37 of the detection device 20, and the lower light detection array 38
Instead, the same configuration as the beam splitters 33 and 34 and the upper photodetection arrays 35 and 36 may be used.

In each of the above embodiments, the angle of the reflecting mirror 12 or the beam splitter 40 is adjusted by rotating around the Z-axis and Y-axis shown in FIG.
The rotation is not limited to this, and can be performed by rotating around any two axes of the X, Y, and Z axes.

Further, the adjustment knobs 13, 14, 16, 17 can be automatically adjusted by output signals from the photodetection arrays 35, 36, 38, etc.

As explained above, according to the present invention, even if a worker or an object intersects with the laser beam, the piano wire swings or breaks, unlike in the case of conventional centering, and the installation work is interrupted. In addition to the unique effect of laser beams, which improves work efficiency because there is no need to change the direction of the laser beam, and there is no shaking due to wind pressure or vibration, the detection device detects errors in the vertical direction of the laser beam with high precision. Since the laser beam can be detected in the vertical direction with high accuracy, it is possible to align the laser beam with the vertical direction downward.Furthermore, since centering adjustment work can be performed only on the top of the hoistway, even one worker can easily perform centering in a short time. There is an effect that it can be done.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the installation centering of a conventional elevator, Fig. 2 is a diagram showing an embodiment of the present invention, Fig. 3 is a central vertical sectional view of the detection device, and Fig. 4 is a diagram showing the upper photodetection array. Figure 5 is a diagram showing the lower photodetecting array, Figure 6 is a diagram showing a circular pattern, and Figure 7 is a diagram showing a circular pattern.
8 and 9 are diagrams showing other embodiments of the present invention. 1...Hoistway, 9a, 9b, 9c...Piano wire, 10...Laser oscillator, 12...Reflector, 1
3, 14, 16, 17, 41...adjustment knob, 1
5...Movable base, 18...Base, 20...Detection device, 22...Display device, 23...Sight, 30...
Detection tube, 33, 34, 40...beam splitter, 35, 36, 38, 52...photodetection array,
37...Concave lens.

Claims (1)

[Scope of Claims] 1. In a method in which a laser beam emitted from a laser oscillator installed in the upper part of the hoistway is used as a reference when performing centering of installation work for installing an elevator in the hoistway, the upper part of the hoistway includes: , a detection tube that passes through the inside of the shaft as the laser beam heads toward the lower part of the hoistway is suspended so that the center axis of the detection tube is vertical; Providing two or more laser beam detection devices,
An elevator installation centering detection device, characterized in that the laser beam detection device constitutes a detection device that detects whether the optical axis of the laser beam coincides with the central axis of the detection tube. 2. The detection tube is rotatably suspended from an auxiliary tube via a first holder on both sides of a first line that intersects at right angles to the central axis, and the auxiliary tube intersects at right angles to the central axis; and is rotatably suspended above the hoistway via a second holder at both ends on a second line that also intersects at right angles to the first line. Elevator installation centering detection device. 3. The laser beam detection device includes a beam splitter provided on the central axis of the detection tube, a photodetection array having a light receiving surface including a plurality of photodetection elements provided on a side surface of the detection tube, and a beam splitter provided on the center axis of the detection tube. Claim 1 is characterized in that the reflected laser beam is detected by the photodetection array.
Elevator installation centering detection device as described in .