JP6377816B1 - Balance weight frame replacement method and replacement jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a balance weight frame replacement method and a replacement jig capable of efficiently performing a balance weight frame replacement operation and reducing an operator's work load. SOLUTION: After the counterweight is lowered along the guide rail to the vicinity of the pit of the hoistway, the counterweight is removed from the guide rail (ST1 to ST4), and the removed counterweight is moved horizontally from the guide rail. It is mounted and fixed on a mounting table provided at a position separated by a predetermined distance (ST5). Then, the counterbalance weight frame for replacement attached to the guide rail is lowered to the position of the counterweight on the mounting table (ST6), and the stacked weight stacked on the counterweight is adjusted while adjusting the height position. Transfer to frame (ST7, ST8). [Selection] Figure 8

Description

  Embodiments described herein relate generally to a balance weight frame replacement method and a replacement jig.

  The counterweight constituting the elevator includes a weight frame and a weight (also referred to as “stacked weight”) loaded in the weight frame. The weight frame needs to be exchanged for the purpose of strengthening strength so that it can withstand aged use and due to legal revisions.

  Conventionally, when changing the balance weight frame, after the balance weight is lowered to the pit of the hoistway, first, the loaded weight is lowered onto the floor of the hoistway and temporarily placed. Next, the old counterweight frame is removed from the guide rail, and the replacement counterweight frame is moved to the pit along the guide rail. Then, the temporarily placed weight is loaded again into the replacement counterweight frame.

Japanese Patent Laid-Open No. 9-40326

  As described above, in the conventional method of replacing the counterweight frame, it is necessary to load and unload the weight from the old counterweight frame, and then load the weight to the replacement counterweight frame. is there. For this reason, the burden of the worker increased and the improvement was desired.

  The present invention has been made in view of the above circumstances, and provides a balance weight frame replacement method and a replacement jig that can efficiently perform the work of replacing the balance weight frame and reduce the work burden on the worker. For the purpose.

  The aspect for achieving the above object is that after the counterweight is lowered along the guide rail to near the pit of the hoistway, the counterweight is removed from the guide rail, and the removed counterweight is removed from the guide rail. It is placed and fixed on a mounting table provided at a position separated by a predetermined distance in the horizontal direction, and a replacement counterweight frame attached to the guide rail is lowered to the position of the counterweight on the mounting table, The balance weight frame exchanging method is characterized in that the laminated weight stacked on the balance weight is transferred to the exchange balance weight frame.

  Further, another aspect is a balance weight frame replacement jig used when transferring the stacked weight stacked on the balance weight frame into the replacement balance weight frame, wherein the horizontal direction of the left and right guide rails A balance weight frame characterized by having an offset jig composed of a support arm attached to the support arm and a mounting table that is placed on the support arm and mounts the balance weight removed from the guide rail. This is a replacement jig.

The front view which shows the whole structure of a balance weight. Explanatory drawing which shows the AA line cross section of FIG. Explanatory drawing which shows the counterweight frame removed from the guide rail and mounted on the jig | tool for offset. Explanatory drawing which shows the structure of the jig | tool for offset. Explanatory drawing which shows the state which attached the work bench to the guide rail. Explanatory drawing of the balance weight frame replacement | exchange method in 1st Embodiment. Explanatory drawing of the balance weight frame replacement | exchange method in 1st Embodiment. Explanatory drawing which shows the process sequence of the balance weight frame replacement | exchange method in embodiment. Explanatory drawing of the balance weight frame replacement | exchange method in 2nd Embodiment. Explanatory drawing of the balance weight frame replacement | exchange method in 3rd Embodiment. Explanatory drawing of the balance weight frame replacement | exchange method in 4th Embodiment.

<First Embodiment>
First, the overall structure of the counterweight will be described with reference to FIG.

  As shown in FIG. 1, the counterweight 1 is connected to a car (not shown) by a rope 2 and moves in the vertical direction along the guide rails 3L and 3R as the car moves.

  The counterweight 1 includes a weight frame 4 and a stacked weight 5 stacked in the weight frame 4. The weight frame 4 includes a pair of left and right vertical frames 6L and 6R having a horizontal cross section formed in a U-shape, an upper beam 7 that connects the vertical frames 6L and 6R upward, and the vertical frames 6L and 6R downward. And a lower beam 8 connected to each other. Guide shoes 9L, 9R and 10L, 10R are respectively provided at the upper and lower ends of the vertical frames 6L, 6R, and guide the counterweight 1 in the vertical direction along the guide rails 3L, 3R.

  The pit 11 of the hoistway is provided with a shock absorber 12 having a shock absorbing function for receiving when the counterweight 1 is lowered from a predetermined position. FIG. 2 shows a cross section taken along line AA of FIG.

  FIG. 3 shows a state in which the counterweight 1 shown in FIG. 2 is removed from the guide rails 3L and 3R and placed on the offset jig 15. 3 shows a state in which the offset jig 15 is attached to the left guide rail 3L, and the counterweight 1 is placed and fixed on the offset jig 15. FIG. In FIG. 3, 21L is a work table provided outside the left guide rail 3L. The work table will be described later with reference to FIG.

  4A and 4B show a state in which the offset jig 15 is attached to the guide rails 3L and 3R. FIG. 4A is a plan view, FIG. 4B is a front view, and FIG. 4C is a right side view.

  The offset jig 15 is provided at a position spaced apart from the guide rails 3L and 3R by a predetermined distance in the horizontal direction and a pair of left and right support arms 16L and 16R extending in the horizontal direction from the guide rails 3L and 3R. A mounting table 17 is provided between them. As can be seen from FIG. 4B, the support arms 16L and 16R are made of angle steel having an L-shaped cross section, and are attached to the guide rails 3L and 3R by rail clips 18. As can be seen from FIG. 4C, the mounting table 17 is made of groove steel having a U-shaped cross section, and is attached to the support arms 16 </ b> L and 16 </ b> R by fastening bolt nuts 20. A weight fixing bolt 19 is previously installed on the upper surface of the mounting table 17, and the counterweight 1 removed from the guide rails 3L and 3R and offset is fixed. FIG. 3 shows a state in which the counterweight 1 is fixed on the mounting table 17.

  FIG. 5 shows a state in which the work tables 21L and 21R are attached to the outside of the guide rails 3L and 3R. FIG. 5A is a plan view and FIG. 5B is a front view.

  As can be seen from the figure, the work tables 21L and 21R are made of flat steel plates, and are fixed to the guide rails 3L and 3R with rail clips, bolts, etc. while a part is placed on the mounting table 17. Has been. Further, the surfaces of the work tables 21L and 21R are subjected to anti-slip processing to prevent the workers working on the work tables 21L and 21R from slipping.

<How to replace the counterweight frame>
Next, a method for replacing the counterweight frame will be described based on the explanatory diagrams of FIGS. 3, 6, and 7 and the flowchart of FIG. In the following description, the counterweight 1 is also referred to as the old counterweight.

  First, the offset jig 15 is attached to the guide rails 3L and 3R. As described in FIG. 4, as the offset jig 15, the support arm 16L made of angle steel having an L-shaped cross section is guided outside the guide rail 3L, and the support arm 16R is guided outside the guide rail 3R. The rail clips 18 are attached so as to be perpendicular to the rails 3L and 3R. A mounting table 17 made of channel steel having a U-shaped cross section is placed on the support arms 16L and 16R attached to the left and right guide rails 3L and 3R, and is fastened to the support arms 16L and 16R by fastening bolt nuts 20. Connection is fixed (step ST1).

  Next, work tables 21L and 21R for a worker to get on and work on the outside of the guide rails 3L and 3R are attached. The mounting operation is performed by attaching rail clips, bolts, or the like to the respective outer surfaces of the guide rails on both sides (step ST2).

  Next, the counterweight 1 is lowered to the pit 11 (step ST3).

  Next, the counterweight 1 is removed from the guide rails 3L and 3R and placed on the mounting table 17. In this operation, as shown in FIG. 1, guide shoes 9R, 9L, 10R, and 10L installed at four positions on the weight frame 4 of the counterweight 1 are removed from the counterweight 1 (step ST4). As a result, the counterweight 1 is released from the restraint of the guide rails 3L and 3R. The workers placed on the left and right work tables 21L and 21R are offset by removing the counterweight 1 from the guide rails 3L and 3R, and place them on the mounting table 17. The counterweight 1 that has been placed is fixed to the mounting table 17 by weight fixing bolts 19 (step ST5). With the above operation, as shown in FIG. 3, the old counterweight 1 is removed from the guide rails 3 </ b> L and 3 </ b> R and is offset and attached to the mounting table 17.

  Next, the replacement counterweight frame 31 is attached to the guide rails 3L and 3R with the guide shoe 32 interposed. As shown in FIG. 6, the replacement counterweight frame 31 is suspended by a chain block 33. The chain block 33 functions as a height position adjusting jig and is connected to the wire 34. The wire 34 is suspended from a rail bracket 36 attached to the hoistway wall 35. (Step ST6).

  The replacement counterweight frame 31 is lowered to the position of the old counterweight 1 fixed on the mounting table 17 along the guide rails 3L and 3R. Next, the worker on the work platforms 21L and 21R takes out the stacking weights 5 one by one from the weight frame 4 of the old counterweight 1, and transfers them into the replacement counterweight frame 31 (step ST8). In this operation, the height position of the stacked weight 5 in the replacement counterweight frame 31 and the height position of the stacked weight 5 in the weight frame 4 of the old counterweight 1 that has been offset are as flush as possible. The chain block 33 is operated to adjust the height position. In this way, through the state shown in FIG. 6 from the state shown in FIG. 6, all the stacked weights 5 are moved into the replacement counterweight frame 31 (step ST9).

  Next, the rope 2 is removed from the old counterweight 1 and attached to the replacement counterweight frame 31 (step ST10). The old counterweight 1 is removed from the offset jig 15 and collected (step ST11). Finally, the offset jig 15 and the work tables 21L and 21R are removed, and the work is completed (step ST12).

  As described above, according to the first embodiment, the old counterweight 1 is offset onto the offset jig 15, and the stacked weight 5 is transferred directly from the old counterweight 1 into the replacement counterweight frame 31. . For this reason, unlike the conventional case, after all the stacking weights 5 are lowered onto the pits 11, there is no need to move the stacking weights 5 again into the replacement counterweight frame 31. The work burden on the staff is reduced.

  Further, the height position is adjusted so that the height position of the stacked weight 5 in the replacement counterweight frame 31 and the height position of the stacked weight 5 in the offset weight frame 4 are as flush as possible. Therefore, the work burden on the worker can be further reduced.

Second Embodiment
FIG. 9 shows another configuration of the height position adjusting jig constituting the replacement jig according to the second embodiment.

  In the first embodiment, the height position of the replacement counterweight frame 31 is adjusted by the chain block 33 as the height position adjusting jig.

  In the second embodiment, as shown in FIG. 9, a jack 41 is installed between the bottom surface of the pit 11 and the lower surface of the replacement counterweight frame 31, and the jack 41 is moved up and down to change the balance for replacement. The height position of the weight frame 31 is adjusted.

  According to the second embodiment, the stacking weight 5 in the weight frame 4 of the old counterweight 1 is offset from the height position of the stacking weight 5 in the replacement counterweight frame 31 by moving the jack 41 up and down. The height position can be made substantially flush with each other. For this reason, it is possible to transfer the stacking weight 5 into the replacement counterweight frame 31 simply by sliding the stacking weight 5 in the horizontal direction, and the efficiency of the transfer work of the stacking weight 5 is improved.

<Third Embodiment>
FIG. 10 shows still another configuration of the height position adjusting jig constituting the replacement jig according to the third embodiment.

  As shown in FIG. 10, in the third embodiment, a spring 51 is installed between the bottom surface of the pit 11 and the lower surface of the replacement balance weight frame 31, and as the spring 51 expands and contracts, the replacement balance weight frame. The height position of 31 is adjusted. The spring 51 can be composed of a compression spring, a bamboo shoot spring, or the like. Further, by using a spring 51 having a spring constant corresponding to the weight of the stacking weight 5, it can be configured to always sink by a certain amount when the stacking weight 5 is moved to the replacement counterweight frame 31. The height position of the laminated weight 5 in the weight frame 31 and the height position of the laminated weight 5 in the weight frame 4 of the old counterweight 1 that is offset can be made substantially flush. For this reason, it is possible to transfer the stacking weight 5 into the replacement counterweight frame 31 simply by sliding the stacking weight 5 in the horizontal direction, and the efficiency of the transfer work of the stacking weight 5 is improved.

<Fourth embodiment>
FIG. 11 shows still another configuration of the height position adjusting jig constituting the replacement jig according to the fourth embodiment.

  As shown in FIG. 11, in the fourth embodiment, a pair of left and right brake devices 61 are installed on the lower surface side of the replacement counterweight frame 31. In the brake device 61, a brake shoe 62 is provided that sandwiches guide portions of the guide rails 3L and 3R (portions where the guide shoes 9L and 9R are in sliding contact). In the process of transferring the stacked weight 5, the brake shoe 62 is loosened at an appropriate position so that the height position of the replacement counterweight frame 31 is adjusted to the height position of the stacked weight 5 in the weight frame 4.

  As described above, the brake device 61 is also used as a height position adjusting jig, so that the height position of the stacked weight 5 in the replacement counterweight frame 31 is offset from the weight frame 4 of the old counterweight 1. The height position of the stacking weight 5 can be made substantially flush. For this reason, it is possible to transfer the stacking weight 5 into the replacement counterweight frame 31 simply by sliding the stacking weight 5 in the horizontal direction, and the efficiency of the transfer work of the stacking weight 5 is improved.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Balance weight, 2 ... Rope, 3L, 3R ... Guide rail, 4 ... Weight frame, 5 ... Laminated weight, 6L, 6R ... Vertical frame, 7 ... Upper beam, 8 ... Lower beam, 9L, 9R, 10L, 10R DESCRIPTION OF SYMBOLS ... Guide shoe, 11 ... Pit, 12 ... Shock absorber, 15 ... Offset jig, 16L, 16R ... Support arm, 17 ... Mounting base, 18 ... Rail clip, 19 ... Weight fixing bolt, 20 ... Fastening bolt nut 21L, 21R ... work bench, 31 ... balance weight frame for replacement, 32 ... guide shoe, 33 ... chain block (height position adjusting jig), 34 ... wire, 35 ... hoistway wall, 36 ... rail bracket, 41 ... Jack (height position adjustment jig), 51 ... Spring (height position adjustment jig), 61 ... Brake device (height position adjustment jig), 62 ... Brake shoe.

Claims (6)

After lowering the counterweight along the guide rail to near the pit of the hoistway, remove the counterweight from the guide rail,
The removed counterweight is placed and fixed on a mounting table provided at a predetermined distance in the horizontal direction from the guide rail,
Lowering the counterbalance weight frame attached to the guide rail to the position of the counterweight on the mounting table;
Transferring the stacked weight stacked on the counterweight to the replacement counterweight frame;
A method of exchanging a counterweight frame characterized by that. While adjusting the height position of the replacement counterweight frame by a height position adjusting jig, the stacking weight is transferred into the replacement counterweight frame.
The method of replacing a counterweight frame according to claim 1. A balancing weight frame replacement jig used when transferring the laminated weight stacked on the balancing weight to the replacement balancing weight frame,
It has an offset jig composed of a support arm attached in the horizontal direction of the left and right guide rails, and a mounting table on which the counterweight is placed on the support arms and removed from the guide rail.
A jig for replacement of a counterweight frame characterized by that. The support arm is configured by attaching an angle steel with an L-shaped cross section to a guide rail,
The mounting table is composed of channel steel having a U-shaped cross section fixed on the support arm.
The jig for replacement of a counterweight frame according to claim 3. A height position adjusting jig for adjusting the height position of the replacement counterweight frame;
5. The counterweight frame replacement jig according to claim 3 or 4, wherein: It is attached to the outside of the guide rail and has a work table on which workers can ride and work.
6. The counterweight frame replacement jig according to any one of claims 3 to 5, wherein:

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