JP6673612B2 - Method and apparatus for adjusting clearance under compensive - Google Patents

Description

  Embodiments of the present invention relate to a method and apparatus for adjusting clearance under compensiveness of an elevator.

  In the elevator, the car and the counterweight are connected by a main rope. As the car moves up and down, the rope weight is disproportionated between the car side and the counterweight side. In order to compensate for this imbalance, compensating ropes are provided so as to hang down from the ride and the counterweight. The folded part of the compensope is wound around the compensive, and the compensive exerts a necessary tension on the compensope.

  Abnormalities such as cutting and loosening of the compensating rope are detected by a detecting device. When an abnormality is detected in the compensating rope, the safety device is activated and the elevator is immediately stopped.

  By the way, elongation occurs in the compensating rope as usual for a wire rope. The elongation of the elevator increases as the stroke increases, and when it comes to the rise of a skyscraper, the elongation of the compensive becomes considerable.

  If the compensating rope stretches, the compensive position will be lowered. The distance between the lower part of the compensive and the floor of the pit (referred to as clearance under the compensive) must be kept within an appropriate range that allows for expansion so that the detector does not operate. For this reason, adjustment of the clearance under compensive has been conventionally performed by various methods.

  One of them is the truncation of compensating ropes. By trimming the compensating rope, the compensive lowered by lifting the rope is lifted, and the clearance under the compensive is revived.

  In addition, instead of cutting down the compen rope, the compens rope is pulled up by a hydraulic jack or the like installed on a counterweight to adjust the clearance under the compensive (Patent Documents 1 and 2).

JP-A-8-67458 JP 2000-309478 A

  However, in many elevators, due to architectural restrictions, the pit depth cannot be sufficiently obtained, and in many cases, it is not possible to maintain a sufficient clearance under compensive. In such a case, if the frequency of cutting down the compensating ropes increases, the burden on maintenance is increased due to complicated and large-scale work.

  On the other hand, when using an adjusting device such as a hydraulic jack, a heavy hydraulic jack is installed on the counterweight, the clearance under the compensive is adjusted, and then the hydraulic jack is removed. .

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the related art, and provides a method and an apparatus for adjusting the clearance under compensive, which facilitates the operation of adjusting the clearance under compensive with a simple mechanism. The purpose is to:

In order to achieve the above object, an apparatus for adjusting clearance under compensive according to an embodiment of the present invention includes a compensator for adding tension to a compensating rope hanging from a car and a counterweight and a pit floor. A device for adjusting a clearance, wherein a terminal of the compensive is fixed, a rope fixing bracket detachably attached in a horizontal posture to a vertical frame of the counterweight, and the rope fixing bracket is disposed on the vertical frame, e Bei a simple lifting mechanism of the screw type which Agekasane each said compensator ropes rope fixing bracket, and the rope fixing bracket is made the compensator ropes from each rope fixing bracket fastened by upper and lower two stages, The screw-type simple lifting mechanism is used to fix the lower rope fixing bracket and the upper rope fixing The Rukoto such a bracket of a pair of jack bolts for connecting the fastening nut is intended characterized.

  In addition, the compensive under clearance adjustment method according to one embodiment of the present invention, the screw-type simple lifting mechanism, the compensive terminal is fastened, horizontally with respect to the vertical frame of the counterweight. Installed on a detachable rope fixing bracket, operate the screw-type simple lifting mechanism, lift the rope fixing bracket together with the compen rope, and adjust the clearance between the compensive and the pit floor. It is characterized by the following.

It is a front view showing the counterweight to which the adjusting device of the clearance under compensive according to the first embodiment of the present invention is attached. It is a front view explaining operation which raises a lower rope fixing bracket. It is a front view explaining operation which pulls up the rope fixing bracket of the upper stage. It is a front view which shows the adjustment apparatus of the clearance under compensive according to 2nd Embodiment of this invention. It is a front view showing an adjustment device of clearance under compensive according to a third embodiment of the present invention. It is a front view showing an adjustment device of under compensive clearance by a 4th embodiment of the present invention. It is a front view showing an adjusting device of clearance under compensive according to a fifth embodiment of the present invention.

Hereinafter, an embodiment of a method and an apparatus for adjusting clearance under compensive according to the present invention will be described with reference to the accompanying drawings.
(1st Embodiment)
FIG. 1 is a view showing a counterweight to which an adjusting device for clearance under compensive according to a first embodiment of the present invention is attached. In FIG. 1, the lower part of the counterweight 10 is shown. Reference numeral 15 indicates a weight. The weight frame of the counterweight 10 includes left and right vertical frames 11A and 11B, a lower frame 12, and an upper frame (not shown). A number of weights 15 are stacked on the weight frame. Reference numerals 13 and 14 indicate weight holders for preventing the weight 15 from falling off.

Reference numbers 16A, 16B, 16C, 16D indicate compensating ropes. These compensating ropes 16A, 16B, 16C, and 16D hang down from the counterweight 10, and a compensive 23 is provided at a folded portion. The compensating ropes 16A, 16B, 16C and 16D wound around the compensive 23 turn upward and extend to a car (not shown).
The compensive 23 is arranged in a pit at the bottom of the hoistway, and is installed so as to be able to move up and down along a guide rail (not shown) for guiding the counterweight 10. In the present embodiment, the clearance C under the compensive to be adjusted is a distance between the compensive 23 and the pit floor surface 24.

  The compensating ropes 16A, 16B, 16C, and 16D are under their own weight and the weight of the compensive 23. If the compensating ropes 16a, 16B, 16C, and 16D are used for a long time, the compensives 23 elongate, and the position of the compensive 23 is lowered. If the compensive unit 23 is lowered too much, the emergency switch will be activated and the elevator will stop.Before this, it is necessary to adjust the clearance C under the compensive unit by raising the compensating ropes 16A, 16B, 16C and 16D. is there.

  In the present embodiment, the ends of the compensating ropes 16A, 16B, 16C, 16D are fixed to the upper and lower two-step rope fixing brackets 17, 19, and the ropes are fixed by the screw type simple lifting mechanism to which the jack bolts 20A, 20B are applied. Raise compensating ropes 16A, 16B, 16C and 16D together with brackets 17 and 19.

  The lower rope fixing bracket 17 is made of an L-shaped member, and is detachably attached to the vertical frames 11A and 11B and the weight holders 13 and 14 using bolts and nuts in a horizontal posture. The rope fixing members 17A and 18B attached to the ends of the compensating ropes 16A and 16B are fastened to the rope fixing bracket 17 using nuts.

  Similarly, the upper rope fixing bracket 19 made of an L-shaped section can be attached to and detached from the vertical frames 11A and 11B and the weight holders 13 and 14 using bolts and nuts in parallel with the lower rope fixing bracket 17. Installed. The compensating ropes 16C and 16D extend upward through the lower rope fixing bracket 17, and the rope fixing members 18C and 1BD attached to the ends of the compensating ropes 16C and 16D use a nut to the upper rope fixing bracket 19. Has been concluded. As shown in FIG. 1, the compensating ropes 18A and 18B fastened to the lower rope fixing bracket 17 and the compensing ropes 18C and 18D fastened to the upper rope fixing bracket 19 are alternately adjacent to each other. Lined up.

  To both ends of the rope fixing brackets 17, 19, jack bolts 20A, 20B having a sufficient length for adjustment are fastened using nuts. Male screws 21a and 21b are formed at both ends of the jack bolt 20A, and male screws 22a and 22b are formed at both ends of the jack bolt 20B.

The apparatus for adjusting the clearance under compensive according to the embodiment of the present invention is configured as described above. Next, the procedure for adjusting the clearance under compensive will be described.
In the present embodiment, the rope fixing brackets 17 and 19 are configured in two stages, upper and lower, and while operating the jack bolts 20A and 20B as described below, the rope fixing brackets 17 and 19 are moved one by one to form the compensating rope 16A. Up to 16D. Either of the rope fixing brackets 17 and 19 may be used first, but here, an example in which the lower rope fixing bracket 17 is pulled up first will be described.

FIG. 2 is a diagram illustrating an operation of pulling up the lower rope fixing bracket 17.
The bolts and nuts that fastened the lower rope fixing bracket 17 to the vertical frames 11A and 11B are removed, so that the lower rope fixing bracket 17 can be moved. Next, as shown in FIG. 2, the detent nut 44A fastened to the upper ends of the jack bolts 20A and 20B is loosened. Nuts 44B and 44C are screwed into the male screws 21b and 22b of the jack bolts 20A and 20B, and the nuts 44B and 44C sandwich the horizontal surface of the rope fixing bracket 19. Of these, the lower nut 44C is turned using a tool such as a wrench, and is lowered below the position shown in FIG.

  As the operator rotates the nut 44B clockwise as viewed from the operator, the nut 44B functions to push up the jack bolts 20A and 20B relatively. The lower ends of the jack bolts 20A and 20B are connected to the lower rope fixing bracket 17, and by turning the nut 44B, the compensating ropes 16A and 16B can be pulled up little by little together with the rope fixing bracket 17. Thereafter, the lower rope fixing bracket 17 is fastened to the vertical frames 11A and 11B by bolts and nuts.

  Next, FIG. 3 is a diagram illustrating an operation of pushing up the rope fixing bracket 19 at the upper stage.

  First, the bolts that fasten the upper rope fixing bracket 19 to the vertical frames 11A and 11B are removed, so that the upper rope fixing bracket 19 can be moved. Next, as shown in FIG. 3, the nut 45B fastened to the lower ends of the jack bolts 20A and 20B is loosened to lower its position. As the operator turns the nut 45A clockwise as viewed from the operator using a tool such as a wrench, the nut 45A functions to push up the jack bolts 20A and 20B relatively. The upper ends of the jack bolts 20A and 20B are connected to the upper rope fixing bracket 19, and by turning the nut 45A, the compensating ropes 16C and 16D can be pushed up little by little together with the rope fixing bracket 19. Thereafter, the upper rope fixing bracket 19 is fastened to the vertical frames 11A and 11B by bolts and nuts.

  By repeatedly pulling up the lower rope fixing bracket 17 and the upper rope fixing bracket 19 in this manner, the compensating ropes 16A to 16D are evenly pulled up, and the compensive lower clearance can be secured within a predetermined set range.

  As described above, according to the present embodiment, the clearance under compensive can be easily and safely adjusted by operating the jack bolts 20A and 20B without installing a heavy object such as a hydraulic jack on the counterweight 10. After the adjustment, work such as removal of used equipment is unnecessary, and the adjustment work can be shortened as a whole.

  Also, due to architectural restrictions, even in cases where the pit depth is not sufficient and there is not enough room for clearance under compensive, the maintenance burden is small and the clearance can be adjusted according to the rope growth. it can.

  Further, according to the present embodiment, the rope fixing brackets 17 and 19 have a two-stage configuration, and the upper stage and the lower stage are alternately pulled up by the jack bolts 20A and 20B, so that the length of the jack bolts 20A and 20B is increased. The adjustment range of the clearance can be greatly expanded without any restriction.

(2nd Embodiment)
Next, an apparatus for adjusting the clearance under compensive according to a second embodiment of the present invention will be described with reference to FIG.

  In the first embodiment, the jack bolts 20A and 20B are used as the screw-type simple lifting mechanism for lifting the compensating ropes 16A to 16D. In the case of the jack bolts 20A and 20B, it is necessary to turn a nut with a tool. This work is a high-altitude work on a car stopped on the middle floor. The operator is forced to apply force to the jack bolts 20A and 20B, and at that time, the posture may be lost, and there may be a problem in ensuring the safety of the operation.

In the second embodiment, as shown in FIG. 4, a ball screw mechanism is used for a screw-type simple lifting mechanism in place of the jack bolts 20A and 20B, as shown in FIG. is there.
Ball screws 30A, 30B are arranged on the vertical frames 11A, 11B in parallel with the length direction thereof. The ball screws 30A, 30B are driven by motors 32A, 32B fixed to the vertical frames 11A, 11B. Ball nuts 31a and 31b fixed to the rope fixing brackets 17 and 19 are screwed into the ball screw 30A. Similarly, ball nuts 33a, 33b fixed to the rope fixing brackets 17, 19 are screwed into the ball screw 30B. An operation panel 35 is provided on the counterweight 10, so that the motors 32A and 32B can be started and stopped from the operation panel 35. When the ball screws 30A, 30B rotate by being driven by the motors 32A, 32B, the rope fixing brackets 17, 19 simultaneously move upward to raise the compensating ropes 16A to 16D, so that the clearance under compensive can be adjusted.

  According to the above-described second embodiment, the clearance under compensive can be adjusted only by operating the operation panel 35, so that the work load on the operator is significantly reduced and safety is ensured. Can be.

(Third embodiment)
Next, an apparatus for adjusting the clearance under compensive according to a third embodiment of the present invention will be described with reference to FIG.

  In both the first and second embodiments, when adjusting the clearance under compensive, the adjustment is performed after removing the bolts and nuts for fixing the rope fixing brackets 17, 19 to the vertical frames 11A, 11B and the like. During this time, the rope fixing brackets 17, 19 are suspended from the jack bolts 20A, 20B or the ball screws 30A, 30B.

  Usually there is no problem, but if an earthquake occurs during the adjustment and the building shakes, the rope fixing brackets 17 and 19 will shake and the screw parts of the jack bolts 20A and 20B or the ball screws 30A and 30B will be May be damaged. In the worst case where the thread is severely damaged, the compensating ropes 16A to 16D may fall together with the rope fixing brackets 17 and 19.

  Therefore, in the third embodiment shown in FIG. 5, the rope fixing brackets 17 and 19 are provided with steady rests 36A, 36B, 37A and 37B. The steady rests 36A and 36B are slidably fitted to the vertical frame 11A, and similarly, the steady rests 37A and 37B are slidably fitted to the vertical frame 11B. When moving the rope fixing brackets 17 and 19 during adjustment, the steady rests 36A, 36B, 37A and 37B function as guides. When an earthquake occurs during the adjustment, the steady rests 36A, 36B, 37A, 37B suppress the swing of the rope fixing brackets 17, 19 in the left-right direction and the front-back direction. Although the rope fixing brackets 17 and 19 are moved by the ball screws 30A and 30B in FIG. 5, the same steady rests 36A, 36B, 37A and 37B can be used when the jack bolts 20A and 20B are used.

  According to the third embodiment as described above, even when the building shakes due to an earthquake during adjustment, the rope fixing brackets 17 and 19 can be prevented from shaking, so the jack bolts 20A and 20B or the ball screw 30A. , 30B can be prevented from being damaged.

(Fourth embodiment)
Next, an apparatus for adjusting the clearance under compensive according to a fourth embodiment of the present invention will be described with reference to FIG.

In the first to third embodiments, the rope fixing brackets 17 and 19 are all configured as two-stage upper and lower stages, but in the fourth embodiment, only the rope fixing bracket 17 is simplified. .
Jack bolts 40A and 40B are connected to both ends of the rope fixing bracket 17. The screw portion 42b on the upper end side of the jack bolts 40A, 40B protrudes upward through the blocks 41A, 41B fixed to the vertical frames 11A, 11B, and is fastened by nuts 46A, 46B. By loosening the nut 46A and then turning the lower nut 46B, the jack bolts 40A and 40B can be moved upward, and the compensating ropes 16A to 16D together with the fixing bracket 17 can be pulled up.
The above-described fourth embodiment is suitable for an elevator having a low up-and-down stroke and a relatively small adjustment allowance for the clearance under compensive.

(Fifth embodiment)
Next, an apparatus for adjusting the clearance under compensive according to a fifth embodiment of the present invention will be described with reference to FIG.

  In the first to fourth embodiments described so far, the rope fixing brackets 17, 19 are moved while operating the jack bolts 20A, 20B, 40A, 40B or the ball screws 30A, 30B one by one on the left and right, so that the left and right It is difficult to tune in. For this reason, the rope fixing brackets 17 and 19 may be inclined, and an uneven load may act on the screw portions of the jack bolts 20A, 20B, 40A and 40B or the ball screws 30A and 30B, causing damage.

  Therefore, in the fourth embodiment, a level 50 is provided on each of the rope fixing brackets 17 and 19, and the level can be adjusted while checking whether the rope fixing brackets 17 and 19 are horizontal. Thereby, damage to the screw portion due to the unbalanced load can be prevented.

  As described above, the adjustment method and apparatus of the clearance under compensive according to the present invention have been described with reference to the preferred embodiments. However, these embodiments are given as examples and are intended to limit the scope of the invention. is not. Of course, the novel apparatus, method, and system described in the specification can be implemented in various forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the present invention. is there. The scope of the claims and their equivalents are intended to cover the embodiments or improvements thereof within the spirit of the invention.

10… Counter weight, 11A, 11B… Vertical frame, 12… Bottom frame, 13… Weight holder, 15… Weight, 16A, 16B, 16C, 16D… Compensation rope, 17… Rope fixing bracket, 18A, 18B, 18C, 18D ... Rope fixing member, 19 ... Rope fixing bracket, 23 ... Compensive, 24 ... Pit floor surface, 10 ..., 13 ..., 20A, 20B ... Jack bolt, 30A, 30B ... Ball screw, 35 ... Operation panel, 36A, 36B ... steady rest, 37A, 37B ... steady rest

Claims (5)

A device that adjusts the clearance between the compensive that adds tension to the compens rope hanging from the ride and the counterweight and the pit floor surface,
A rope fixing bracket to which the terminal of the compensive is fastened and that is detachably attached in a horizontal position with respect to the vertical frame of the counterweight,
Wherein arranged in the vertical frame, Bei example and a simple lifting mechanism of the screw type which Agekasane each of the rope fixing bracket the compensator ropes,
The rope fixing bracket is composed of a rope fixing bracket of a two-stage configuration in which the compensating rope is fixed to each other,
The threaded simple lifting mechanism, the adjustment device of Konpenshibu under clearance, wherein Rukoto such a pair of jack bolts and lower the rope fixing bracket and the upper rope fixing bracket connected by fastening the nut. A device that adjusts the clearance between the compensive that adds tension to the compens rope hanging from the ride and the counterweight and the pit floor surface,
A rope fixing bracket to which the terminal of the compensive is fastened and that is detachably attached in a horizontal position with respect to the vertical frame of the counterweight,
A screw-type simple lifting mechanism that is disposed on the vertical frame and lifts the rope fixing bracket together with the compen rope,
The rope fixing bracket is composed of a rope fixing bracket of a two-stage configuration in which the compensating rope is fixed to each other,
The screw-type simple lifting mechanism operates a pair of ball screw mechanisms for connecting the lower rope fixing bracket and the upper rope fixing bracket, a motor for driving the ball screw mechanism, and starting and stopping of the motor. And an operation panel for adjusting the clearance under the compensive. 3. The container according to claim 1, wherein the rope fixing bracket is provided at both ends thereof with a steady rest that is slidable along the vertical frame and restrains the bracket from swinging. 4. Adjustment device for clearance under pen sheave. The clearance adjusting device according to claim 1 or 2 , wherein a level for judging the inclination is disposed on the rope fixing bracket. A method of adjusting the clearance between the compensive which adds tension to the compens rope hanging from the ride and the counterweight and the pit floor surface,
The screw-type simple lifting mechanism according to any one of claims 1 to 4 , wherein the compensive terminal is fixed to a rope fixing bracket which is horizontally detachably attached to a vertical frame of the counterweight. Install,
Operating the screw-type simple lifting mechanism, lifting the rope fixing bracket together with the compensating rope, and adjusting the clearance between the compensive and the pit floor surface, wherein a method of adjusting the clearance below the compensive. .

Images