JPH0248389A - Cage position measuring device for elevator - Google Patents

Abstract

PURPOSE:To get rid of any error in a cage position displacement detecting signal as well as to aim at the measurement of an accurate cage displacement distance by installing a mechanism, keeping off any movement due to a wind out of a reference line, in plural positions between top and bottom of this reference line. CONSTITUTION:A part of the uppermost portion of a mounting arm clamped to a guide rail 1a by a clip 11 is bent in an L-shaped form to which a reference tape 13 is being locked, and it is hung down by a weight. Each mounting arm 16 of plural pieces of section L-shaped members is anchored to the guide rail 1a at intervals by the clips 11 and bolts 12. Each bracing piece 17 is locked to each tip of these mounting arms 16 so as to come into contact with a side face of the tape 13. The bracing pieces 17 are made so as to come into contact with both sides of the tape 13 alternately. With this constitution, even if a wind being produced by cage lifting motion and air penetrating from a clearance hit on the reference tape 13, any deflection is kept back by the bracing piece 17. Consequently, a detecting signal out of a cage displacement detector comes to such a signal that is not affected by the wind, so that a cage displacement distance is accurately measurable.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a device for detecting displacement of a car in an elevator, and more particularly to a structure for preventing measurement errors.

[Conventional technology]

FIG. 4 is a front view showing a conventional elevator car position measuring device. In the figure, la and lb are guide rails in the elevator, and the guide rails are arranged along the inner wall surface of the hoistway.
It is fixed parallel to the vertical direction. A main rope 2 is suspended from a hoist installed at the top of the hoistway. 3 is a car frame suspended from the main lobe 2, and a car 4 is assembled inside the car frame. The guide rail la in this car frame 3,
Guide shoes 5a to 5d that engage with the guide rails la and lb and slide only in the longitudinal direction are fixed to four upper and lower portions facing the guide rails lb. Therefore, the car frame 3 is moved by the guide rail l by the guide shoes 5a to 5d.
Guided by a and lb, it is possible to move only in the vertical direction. 6 is a reference line hanging down from the top of the hoistway, and a piano wire or the like is used as this reference line. 7 is a U-shaped detector mounting bracket, which is attached to the car frame 3.
The reference line 6 is fixed to the upper part of the reference line 6. A car displacement distance detector 8 is fixed to the upper part of the detector mounting bracket 7 and outputs the displacement distance of the car by detecting the position of the reference line 6 optically, for example. Reference numeral 9 denotes a recording device for recording the output of the car displacement distance detector 8 on continuous paper. Next, the operation will be explained. First, the car frame is lowered by a commonly known car operating device to a position where the floor of the car room coincides with the landing floor of the lowest floor. At this time, adjust the position of the car displacement distance detector 8 so that the output voltage of the car displacement distance detector 8 becomes zero, or insert a variable resistor for zero adjustment in front of the recording device 9. do. Next, once the initial setting process is completed in this way,
After the recording device 9 is set to the operating state, the car frame 3 is raised by the car operating device. Then, the car frame 3 is guided by the guide rails la and lb by the guide shoes 5a to 5d and moves. Here, if there is an installation error in the guide rails la, lb, the car frame 3 will rise while moving back and forth and left and right. Since the car frame 3 is provided with a car displacement distance detector 8 that detects the position of the reference line 6, the car displacement distance detector 8 detects the displacement of the car frame 3 with respect to the reference line 6. The amount will be output as a displacement detection signal. This displacement detection signal is then transmitted to the recording device 9.
For example, it is recorded as a car displacement curve on continuous paper. Therefore, by looking at this car displacement curve, the engineer understands the parts of the guide rails la, lb where installation errors occur, and adjusts the installation of the guide rails la, lb with respect to such parts.

[Problem to be solved by the invention]

Conventional elevator car position measuring devices are configured as described above, and the reference line is swayed by the wind that occurs when the elevator car is moved up and down and the wind that enters through the gaps, making it possible to detect car displacement distance. There was a problem in that the displacement detection signal outputted from the device 8 contained an error. This invention was made to solve the above-mentioned problems, and it is an object of the present invention to provide an elevator car position measuring device that prevents errors from occurring due to fluctuations of the reference line due to wind or the like.

[Means to solve the problem]

An elevator car position measuring device according to the present invention prevents deviation of a reference line in an elevator car position measuring device that measures a car position by detecting the position of a reference line suspended in an elevator hoistway. It is equipped with a movement prevention mechanism.

[Effect]

The elevator car position measuring device according to the present invention is equipped with a movement prevention mechanism to prevent movement of a reference line suspended in the elevator hoistway. Even if the reference line is hit by wind that enters through the gap when the car is raised or lowered, the movement prevention mechanism prevents the reference line from swinging, making it possible to accurately measure the car position.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, reference numeral 10 denotes a mounting arm whose tip end is bent into an L-shape, and is fixed to the guide rail 1a by a clip 11 and a port 12. One end of a tape 13 serving as a reference line is screwed and suspended from the bent portion of the tip of the mounting arm 10 located at the top. Reference numeral 14 indicates a weight fixed to the lower end of the tape 13 in order to apply tension to the tape 13, and reference numeral 15 indicates a bent end of the mounting arm 10, similar to the above, fixed to the guide rail 1a so as to be located at one end of the tape 13. Fixed to the part, tape 1
This is a guide plate that guides the lower end of 3. FIG. 2 is a perspective view of a main part showing a movement prevention mechanism provided between the upper mounting arm 10 and the lower mounting arm 10 shown in FIG. 1. In the figure, reference numeral 16 denotes a mounting arm made of a cross-sectional member, one end of which is connected to the clip 11.
and is fixed to the guide rail 1a by bolts 12. A steadying piece 17 is fixed to the mounting arm 16, the tip of which is in contact with the side surface of the tape 13. , and the movement prevention mechanism configured in this way is
A plurality of tapes are provided in the vertical direction along the tape 13,
The steady rest pieces 17 in each movement prevention mechanism are arranged so as to be alternately located on the left and right sides of the tape 13. FIG. 3 is a perspective view showing the installed state of the car displacement distance detector 8 for detecting displacement of the car position with the position of the tape 13 as a reference. In the figure, 8a. Reference numeral 8b denotes a light emitting part and a light receiving part which constitute the car displacement distance detector 8, and are fixed to the detector mounting bracket 7 with the tape 13 sandwiched therebetween. Next, how to attach the tape 13 and the movement prevention mechanism will be explained. First, the mounting arms 10 are fixed to the upper and lower parts of the guide rail 1a. Then, one end of the tape 13 is fixed to the bent portion of the tip of the upper mounting arm 10, and a weight is fixed to the other end, and the tape 13 is lowered to the lower part of the hoistway to be in a freely suspended state. Next, lower mounting arm 1
After positioning so that the bent part provided at the tip of the tape 13 comes into contact with the side surface of the tape 13 which is in a freely suspended state, the guide plate 15 is fixed to the mounting arm 10 and the tape 13 is
prevent horizontal sway. Next, a plurality of mounting arms 16 are fixed between the upper and lower mounting arms 10 on the guide rail 1a. Then, a steadying piece 17 is fixed to the tip of the mounting arm 16. In this case, the tips of the steady rest pieces 17 are arranged so as to be alternately located on both sides of the tape 13. Note that the tip of each of the steady rest pieces 17 is provided at a position away from the passage of the light projecting part 8a and the light receiving part 8b so as not to come into contact with the light projecting part 8a and the light receiving part 8b. Next, when the initial setting process is completed, the recording device is set to the operating state, and then the car frame 3 is raised by the car operating device. Then, the car frame 3 is moved by the guide shoe.
It moves guided by guide rails la and lb. Here, the guide rail Ia. If there is an installation error in 1b, the car frame 3 will rise while moving back and forth, left and right. Since the car frame 3 is provided with a car displacement distance detector 8 that detects the position of the tape 13 as a reference line, the car frame 3 with respect to the tape 6 is detected from the car displacement distance detector 8. The amount of displacement will be output as a displacement detection signal. Then, this displacement detection signal is recorded as a car displacement curve on continuous paper, for example, in a recording device. Therefore,
By looking at this car displacement curve, the engineer can grasp the portions of the guide rails la and lb where installation errors occur, and can easily make installation adjustments for those portions. Here, when the car frame 3 is raised and lowered, the wind generated in the hoistway and the wind that enters through the gaps act on the tape 13 used as a reference line. However, this tape 13 is completely prevented from swaying due to the wind because its side portions are held by the steadying pieces 17 at a plurality of locations between its upper and lower ends. Therefore, the displacement detection signal output from the car displacement distance detector 8 that detects the position of the tape 13 is an accurate signal that is not affected by wind. In addition, in the above embodiment, only the case where the steady rest piece was fixed to the guide rail side was explained, but the present invention is not limited to this, and it may be fixed at any place on the fixed side. Needless to say.

【Effect of the invention】

As explained above, according to the present invention, since the movement prevention mechanism is provided between both ends of the reference line, the wind generated when the car frame is raised and lowered and the wind that enters through the gaps act on the reference line. However, since such fluctuation of the reference line is reliably prevented, there is an effect that the car displacement distance can always be accurately measured.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a main part of an elevator car position measuring device according to the present invention, FIG. 2 is a perspective view of a main part of a movement prevention mechanism of a car position measuring device used in an elevator according to the present invention, and FIG. 3 is a perspective view of a main part of a car position measuring device according to the invention. FIG. 4 is a perspective view showing the installation state of a displacement distance detector used in an elevator car position measuring device according to the present invention, and FIG. 4 is a perspective view of a main part showing a conventional elevator car position measuring device. 1a is a guide rail, 8 is a car displacement distance detector, 8a is a light emitter, 8b is a light receiver, 10 is a mounting arm, 11 is a clip, 12 is a bolt, 13 is a tape, 14 is a weight, 15 is a guide plate, 16 is a mounting arm, and 17 is a steady rest piece. In addition, the same symbols in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] A reference line is provided in the elevator hoistway along the vertical direction thereof, and a car moving in the hoistway is provided to face the reference line, thereby detecting the displacement of the car with respect to the reference line. An elevator car position measuring device, characterized in that the elevator car position measuring device is provided with a movement prevention mechanism that prevents movement of the reference line.