JP3787042B2 - Elevator guide rail re-centering method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a guide rail re-centering method for an elevator that is suitable for use in an elevator installed in a relatively old high-rise building or the like and having increased distortion and bending of the guide rail.
[0002]
[Prior art]
The ultra-high speed elevator installed in a skyscraper generally has its own weight as a guide rail group with a predetermined length corresponding to the height of the hoistway by adding multiple guide rails and shrinking the skyscraper itself due to secular change. Therefore, each guide rail is likely to be distorted or bent. In particular, in elevators installed in skyscrapers over 20 years old, there is a problem that considerable noise and vibration are generated when the car is running because the distortion and bending of the guide rails are increasing. there were.
[0003]
As conventional techniques for preventing such distortion and bending of the guide rail, for example, as disclosed in Japanese Utility Model Laid-Open No. 4-88475, a lower end of the guide rail group, and a rail cradle for supporting the guide rail group, In the meantime, a method of interposing an elastic body has been proposed. Further, as disclosed in Japanese Patent Laid-Open No. 57-48582, there is also proposed a method in which an appropriate gap is provided between the guide rails, and the bending of the guide rail is corrected by letting it escape to the gap. .
[0004]
[Problems to be solved by the invention]
The conventional techniques proposed in Japanese Utility Model Laid-Open No. 4-88475 and Japanese Patent Laid-Open No. 57-48582 are effective when the guide rail is small in distortion and bending, but it is a high-rise building that has been built for more than 20 years. For example, it is not possible to sufficiently correct large distortion and bending that are manifested in the guide rail of the elevator. For this reason, in recent years when skyscrapers have become widespread, a new technique that can smoothly and reliably correct large distortions and bends that have occurred in the guide rails of elevators is desired.
[0005]
The present invention has been made in view of the above-described problems of the prior art, and its purpose is suitable for correcting large distortion and bending generated in a guide rail of an elevator installed in a skyscraper, etc. It is an object of the present invention to provide a guide rail re-centering method for an elevator that can reliably re-center the guide rail.
[0006]
[Means for Solving the Problems]
In the present invention, each of the guide rails of the guide rail group extended by a predetermined length corresponding to the height of the hoistway by adding a plurality of guide rails to the intermediate beam in the hoistway using the rail clip. In the guide rail re-centering method of the elevator fixed to the held rail bracket, the first step of attaching the non-slip rail bracket on the rail bracket after the rail clip is tightened, and the lowest position A second step of jacking up the intermediate beam with a hydraulic jack, a third step of attaching a reinforcing bracket to the lowermost guide rail of the guide rail group, and a part of the lower end of the lowermost guide rail Is cut and removed at a predetermined cutting position, and a jack bolt is installed at the cut and removed portion to support the guide rail group. A fourth step, a fifth step of cutting and removing the remaining portion of the lower end portion of the lowermost guide rail, a sixth step of removing the derailing rail bracket, and the lowermost guide rail no longer descending A seventh step of loosening the jack bolt, an eighth step of gradually reducing the jack-up amount to remove the hydraulic jack, and loosening the rail clip fixing the lowermost guide rail The ninth step of centering the lowermost guide rail lowered by a predetermined dimension and then fixing it again with the rail clip, and each guide rail located above the lowermost guide rail from the bottom 1 And the tenth step of centering and fixing to the top guide rail one by one. In this tenth step, the target guide rail is fixed. Said Loosen the rail clip and centered from is lowered to a position where a predetermined gap is formed between the lower guide rail and to be fixed again by the rail clip after centering.
[0007]
In this way, after the lower end of the lowermost guide rail is cut and removed, jack bolts are installed there, then each guide rail is lowered from the bottom one by one to a predetermined position and then centered and fixed. According to the delivery method, even when the guide rail is heavily distorted or bent by an elevator installed in a skyscraper over 20 years old, the lower end of the lowermost guide rail is appropriately cut to the appropriate size. It can be dealt with by removing, and the distortion and bending of the guide rail group can be surely corrected. For example, when the number of guide rails constituting the guide rail group is M, the predetermined gap is G, and the predetermined dimension is L, the length dimension to cut and remove the lower end portion of the lowermost guide rail is (M XG + L) may be set. In addition, since there is no particularly complicated work or dangerous work in each of the above-described steps (first to tenth steps), the guide rail can be re-centered safely and smoothly.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a guide rail re-centering method according to the present invention will be described with reference to FIGS. However, FIG. 1 is an explanatory diagram of the lower part of the hoistway showing how the embodiment is in the middle of the work, FIG. 2 is a flowchart showing the work procedure up to the step of removing the detent rail bracket in the embodiment, and FIG. FIG. 4 is an explanatory diagram showing a procedure for cutting and removing a part of the lower end portion of the lowermost guide rail in this embodiment example, and FIG. 5 is a flowchart showing a work procedure after the step of lowering the lowermost guide rail in the embodiment example. FIG. 6 is an explanatory view showing a state in which jack bolts are installed at the cut and removed portion of the lowermost guide rail, and FIG. 6 is an explanatory view showing a state in which the lower end portion of the lowermost guide rail is all cut and removed.
[0009]
In this embodiment, when the super-high speed elevator is renewed, distortion and bending of the guide rail group are corrected and re-centering is performed. Such an ultra-high speed elevator is installed in a skyscraper, and the car moves up and down at a high speed of 540 m / min.
[0010]
In FIG. 1, a realignment structure generally indicated by reference numeral 1 includes a hydraulic jack 2 installed on the inner bottom of a hoistway pit, a plurality of reinforcing brackets 3 and 3A, and these reinforcing brackets 3 and 3A. A plurality of rail clips 4, 4A, 4B, 4C for fixing, a lowermost intermediate beam 5 positioned at the lowest position among the intermediate beam groups fixed in the hoistway and supporting the guide rail group 9, and the above-mentioned A steel pipe 6 erected between the hydraulic jack 2, a derailment rail bracket 7, 7A, 7B, 7C and a jack bolt 8 installed at the lowermost end of the guide rail group 9 are provided. One end side of the reinforcing brackets 3 and 3A is fixed to the lowermost guide rail 9A located at the lowest position in the guide rail group 9 using rail clips 4 and 4A, and the other end side is fixed to the rail clips 4B and 4C. To the other guide rail group 10 adjacent to the lowermost guide rail 9A or the hoistway wall. In this embodiment, cast iron rail clips are used as the rail clips 4 and 4A, and spring rail clips are used as the rail clips 4B and 4C. Further, a wood plate 11 is interposed between the steel pipe 6 and the lowermost intermediate beam 5. Each of the guide rail group 9 and the guide rail group 10 is formed by adding a plurality of guide rails and extending to a predetermined length corresponding to the hoistway height.
[0011]
Reference numeral 5A in FIG. 1 indicates an intermediate beam fixed above the lowermost intermediate beam 5, and reference numerals 12 and 12A fix the lowermost guide rail 9A using rail clips 15 and 15A. The existing rail bracket is shown. These rail brackets 12 and 12A are held by intermediate beams 5 and 5A, respectively. Reference numerals 14, 14 </ b> A, 14 </ b> B, and 14 </ b> C denote rail clips that fix the shift rail brackets 7, 7 </ b> A, 7 </ b> B, and 7 </ b> C to the lowermost guide rail 9 </ b> A.
[0012]
Next, the realignment operation of the guide rail group 9 performed using the realignment structure 1 will be described with reference to the flowcharts of FIGS. 2 and 3.
[0013]
First, after tightening all the rail clips 15, 15A, etc., fixing the guide rail group 9 to the rail brackets 12, 12A, etc., as shown in step S1 of FIG. 2, the lowermost guide rail 9A is fixed. The rail brackets 7, 7A, 7B, 7C are fixed above the existing brackets 12, 12A using rail clips 14, 14A, 14B, 14C.
[0014]
Next, as shown in step S <b> 2, the hydraulic jack 2 is installed on the inner bottom of the hoistway pit, and the lowermost intermediate beam 5 is jacked up with the hydraulic jack 2 through the steel pipe 6 and the wooden board 11.
[0015]
And as shown to step S3, the mark X which shows the cutting position from the lower end of 9 A of lowermost guide rails is drawn on the guide site | part of the lowermost guide rail 9A. This cutting position is determined by assuming that the number of guide rails constituting the guide rail group 9 is M, the rail gap is G, and the amount by which the lowermost guide rail 9A is lowered when centering is L is L. The length dimension for cutting and removing the lower end portion is set to (M × G + L).
[0016]
Thereafter, as shown in FIG. 1 and step S4, the reinforcing bracket 3 is attached to the other guide rail group 10 (or hoistway wall) adjacent to the lowermost guide rail 9A using the rail clips 4, 4A, 4B, 4C. , 3A is attached.
[0017]
Next, as shown in step S5, a 6φ test hole H1 is first drilled in the mark X indicating the cutting position using an electric drill (not shown) to confirm the compressive stress, and then the test hole H1 is formed. Let it be a large hole H2 of 20φ. Thereafter, the lower end of the lowermost guide rail 9A is cut along the mark X by a gas fusing machine (not shown) using the hole H2. Changes in the state of the lower end portion of the lowermost guide rail 9A from when the test hole H1 is formed to when it is cut are as shown in (a), (b), and (c) of FIG.
[0018]
When a part of the lower end portion of the lowermost guide rail 9A is cut in this way, as shown in step S6, jack bolts 8 are installed on the cut and removed portion to support the guide rail group 9. The installation state of the jack bolt 8 at this time is as shown in FIG.
[0019]
Next, as shown in step S7 and FIGS. 5 and 6, the remaining portion Y that is not cut at the lower end of the lowermost guide rail 9A is cut and removed while the guide rail group 9 is supported by the jack bolts 8.
[0020]
Then, as shown in step S8, the derailment rail brackets 7, 7A, 7B, 7C are sequentially removed from the bottom.
[0021]
Thereafter, as shown in step S9, the jack bolt 8 is repeatedly moved up and down and gradually loosened to release the stress of the guide rail group 9 so that the lowermost guide rail 9A is not lowered. Specifically, with the stress of the guide rail group 9 released, the gap between the lower end of the lowermost guide rail 9A and the jack plate is set to 5 mm, and the gap is reduced to 0 mm by the lowering of the lowermost guide rail 9A. Then, the operation of loosening the jack bolt 8 again to secure a new gap is repeated until the lowermost guide rail 9A is not lowered.
[0022]
Next, as shown in step S10, the hydraulic jack 2 is lowered to gradually reduce the jack-up amount, and then the hydraulic jack 2 and the steel pipe 6 are removed.
[0023]
Then, as shown in step S11, the rail clips 15 and 15A fixing the lowermost guide rail 9A to the rail brackets 12 and 12A are loosened, and the lowermost guide rail 9A is moved to the lowermost gap position by a predetermined dimension L. After the suspension, centering work of the lowermost guide rail 9A is performed, and after the centering, the rail clips 15 and 15A are fastened and fixed again.
[0024]
Finally, as shown in steps S12 and S13, the guide rails located above the lowermost guide rail 9A are centered and fixed one by one from the bottom. That is, with respect to the guide rail located immediately above the centered and fixed guide rail, the rail clip is first loosened and suspended to a position where a predetermined gap (rail gap) G is formed between the guide rail and the lower guide rail. Re-centering of the guide rail group 9 is performed by performing centering fixing work of centering and fixing again with the rail clip after centering, and performing this centering fixing work one by one up to the uppermost guide rail. Is completed.
[0025]
As described above, in this embodiment, the reinforcing brackets 3 and 3A are attached in advance, thereby preventing the guide rail 9A from rebounding to the left and right, which is a concern when the lower end of the lowermost guide rail 9A is cut and removed. Therefore, it is possible to safely cut and remove. Further, after the lower end of the lowermost guide rail 9A is cut and removed, the jack bolts 8 are gradually loosened to release the stress of the guide rail group 9, and then the hydraulic jack 2 and the like are removed. Safety is also ensured. Further, since each guide rail of the guide rail group 9 is centered and fixed one by one from the bottom, the work can be performed smoothly and the reliability is high.
[0026]
If the predetermined gap G is set to about 1 mm and the predetermined dimension L is set to about 100 mm, the guide rail group 9 can be sufficiently corrected even if large distortion or bending occurs, Even when the guide rail is distorted or bent due to load fluctuations when luggage or equipment is carried into the skyscraper after re-centering, the distortion or bending can be easily corrected.
[0027]
【The invention's effect】
The present invention is implemented in the form as described above, and has the effects described below.
[0028]
After jacking up the lowermost intermediate beam with a hydraulic jack and attaching a reinforcing bracket to the lowermost guide rail, cutting and removing the lower end of the lowermost guide rail and installing jack bolts there, each guide rail It is a re-centering method that lowers each to the specified position one by one from the bottom, and then fixes it, so that the guide rails are greatly distorted or bent by an elevator installed in a skyscraper over 20 years old. Even when the lower limit guide rail is generated, the lower end portion of the lowermost guide rail can be dealt with by cutting and removing it by an appropriate size, and the distortion and bending of the guide rail group can be reliably corrected. For example, when the number of guide rails constituting the guide rail group is M, the gap with the lower guide rail is G, and the amount by which the lowermost guide rail is lowered during centering is L, the lower end of the lowermost guide rail The length dimension to be cut and removed may be set to (M × G + L). In addition, since there is no need to perform particularly complicated work or dangerous work, the guide rail can be re-centered safely and smoothly.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a lower part of a hoistway showing a state in the middle of work according to an embodiment of the present invention.
FIG. 2 is a flowchart showing a work procedure up to a step of removing the locking rail bracket in the embodiment.
FIG. 3 is a flowchart showing a work procedure after a step of lowering a lowermost guide rail in the embodiment.
FIG. 4 is an explanatory view showing a procedure for cutting and removing a part of the lower end portion of the lowermost guide rail in the embodiment.
FIG. 5 is an explanatory view showing a state in which jack bolts are installed at a cut and removed portion of the lowermost guide rail.
FIG. 6 is an explanatory view showing a state where the lower end portion of the lowermost guide rail is all cut and removed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Re-centering structure 2 Hydraulic jack 3, 3A Reinforcement bracket 4, 4A, 4B, 4C Rail clip 5 Lowermost intermediate beam 6 Steel pipe 7, 7A, 7B, 7C Stop bracket 8 Jack bolt 9 Guide rail group 9A Bottom Guide rail 12, 12A Rail bracket 14, 14A, 14B, 14C, 15, 15A Rail clip

Claims (1)

The guide rails of the guide rail group extended by a predetermined length corresponding to the height of the hoistway by adding a plurality of guide rails are each held by the intermediate beam in the hoistway using a rail clip. In the guide rail re-centering method of the elevator fixed to the bracket,
A first step of tightening the rail clip and then attaching an anti-slip rail bracket on the rail bracket;
A second step of jacking up the intermediate beam located at the lowest level with a hydraulic jack;
A third step of attaching a reinforcing bracket to the lowermost guide rail of the guide rail group;
A fourth step of cutting and removing a part of the lower end of the lowermost guide rail at a predetermined cutting position, and installing a jack bolt on the cut and removed portion to support the guide rail group;
A fifth step of cutting and removing the remaining portion of the lower end of the lowermost guide rail;
A sixth step of removing the slip rail bracket;
A seventh step of loosening the jack bolt until the lowermost guide rail does not descend;
An eighth step of gradually removing the jack-up amount to remove the hydraulic jack;
A ninth step of loosening the rail clip fixing the lowermost guide rail, centering the lowermost guide rail lowered by a predetermined dimension, and then fixing the rail clip again with the rail clip;
A tenth step of sequentially centering and fixing the guide rails located above the lowermost guide rail one by one from the bottom to the uppermost guide rail,
In the tenth step, the rail clip that fixes the target guide rail is loosened and lowered to a position where a predetermined gap is formed between the guide rail and the lower guide rail. A guide rail re-centering method for an elevator, wherein the rail clip is later fixed again.

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