JP5452355B2 - How to remove and install elevator counterweight through-bolts - Google Patents

Description

  The present invention relates to an elevator counterweight through-bolt removal method and attachment method for attaching / detaching a counterweight through-bolt when an elevator is removed or the like.

The counterweight of a large elevator consists of multiple weight plates stacked in a frame. Pass through bolts through holes in the weight plate, tighten the upper and lower ends of the through bolts with upper and lower beams with nuts, The board does not dance.
And in the removal work of the elevator, the counterweight is not dismantled at once, but the number of weight plates is gradually reduced according to the dismantling of the car, but it is necessary to remove the through bolts before this work However, since the pulley is arranged near the upper end of the through bolt, it can be pulled out only downward.
For this reason, it is necessary to first remove the nut that secures the upper end of the through-bolt, then remove the nut that secures the lower end of the through-bolt, and then pull the through-bolt down. A work scaffold is assembled (for example, see Patent Document 1).

JP 11-349255 A

  However, the length of the through bolt is as long as 3 to 5 m, and in order to pull out the through bolt, it is necessary to secure at least a height below the counterweight, so the work of removing the through bolt Therefore, there is a problem that a scaffold with a height of 10 m must be assembled.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an elevator counterweight through-bolt removal method and attachment method in which a through-bolt is attached and detached without assembling a scaffold.

  The elevator counterweight through bolt removing method according to the present invention is an elevator counterweight weight bolt removing method for removing a through bolt that prevents ramping of the elevator counterweight weight plate. A procedure for attaching the means to the lower end of the through-bolt, a procedure for passing the wire over the counterweight, and temporarily holding the middle of the wire near the attachment means for the wire by the holding means To make a ring, to remove the nut fastened to the upper end of the through-bolt, and to hold the other part of the wire in order with the holding means so that the ring size of the wire becomes longer sequentially. However, a procedure for lowering the through bolt with its own weight is included.

  The method of installing the elevator counterweight through bolt according to the present invention is the elevator counterweight through bolt mounting method for attaching a through bolt for preventing the ramp of the counterweight of the elevator counterweight from moving. A step of hanging, a step of attaching the engaging means provided on the wire to the lower end of the through-bolt, a step of inserting the upper end of the through-bolt into the through hole of the weight plate from below, and a middle of the wire A procedure for making a ring by temporarily holding the wire in the vicinity of the attachment means of the wire, and separating the wire by the holding means so that the size of the wire ring is sequentially shortened. Steps to raise the through-bolt while sequentially holding the points, and tighten the nut to the upper end of the through-bolt Including a forward, a.

  The method of removing and attaching the elevator counterweight through-bolt according to the present invention can attach the removal jig on the elevator car, remove the double nut or remove the through-bolt, so there is no need to assemble a scaffold. It only needs to be moved manually several times, and it has the effect of dismantling the counterweight safely.

It is an external view of a counterweight according to the present invention. It is an external view of the removal jig | tool which concerns on this invention. It is a figure which shows the mode of the first half which removes a through bolt from a counterweight. It is a figure which shows the mode of the second half which removes a through bolt from a counterweight.

Hereinafter, preferred embodiments of a method for removing and attaching an elevator counterweight bolt according to the present invention will be described with reference to the drawings. FIG. 1 is an external view of a counterweight according to the present invention.
First, the counterweight before removing the through bolt will be described.
As shown in FIG. 1, the counterweight 1 includes a frame 4 composed of upper and lower beams 2 a, 2 b and a column 3 that fixes the upper and lower beams 2 a, 2 b, a weight plate 5 stacked in the frame 4, and a weight plate 5. A through bolt 6 that is a steel rod that passes through a hole (not shown) provided at the both ends and has a screw thread (not shown) at both ends, and is threaded into the upper and lower screw threads of the through bolt 6 so that the through bolt 6 is connected to the upper and lower beams. It consists of a double nut 7 fixed to 2a, 2b and a pulley 8 arranged above the frame 4. And since the pulley 8 is arrange | positioned upwards, the through-bolt 6 can be pulled out only downward. The counterweight 1 is fitted with guide shoes (not shown) provided at the four corners of the frame 4 to guide rails (not shown) laid on the hoistway so as to face the pillars 3, and the counterweight 1 follows the guide rails. Go up and down.

Next, the removal jig | tool 10 used when removing the through bolt 6 is demonstrated. FIG. 2 is an external view of the removal jig according to the present invention.
The removal jig 10 is a wire 11 longer than four times the length of the through-bolt 6, a flat washer 12 fastened to one end of the wire 11, and a holding means that can be freely attached to and detached from the wire 11. The clip 13 is configured. The flat washer 12 is provided with two through holes 12a for allowing the wire 11 to pass therethrough.

Next, a procedure for removing the through bolt 6 from the counterweight 1 using the removal jig 10 will be described. 3 and 4 are views showing a state where the through bolt is removed from the counterweight.
First, as shown in FIG. 3 (a), the worker 21 riding on the elevator car 20 manually stops the elevator car 20 so that the elevator car 20 is aligned with the lower beam 2b of the counterweight 1. The operator 21 removes the lower nut of the double nut 7, puts the flat washer 12 into the bolt 6 from the lower end, and tightens the nut to fix the flat washer 12 between the double nuts 7.

  Next, as shown in FIG. 3 (b), the elevator car 20 is manually moved so that the top of the car is aligned with the upper beam 2 a of the counterweight 1 and stopped. At this time, the wire 11 is properly fed from the car by the worker 21, and when the elevator car 20 stops, the worker 21 pulls down the wire 11 so that one end of the wire 11 straddles the upper beam 2a.

Next, as shown in FIG. 3C, the elevator car 20 is manually moved so that the top of the car is aligned with the lower beam 2b of the counterweight 1 and stopped. The worker 21 inserted the end portion of the wire 11 into another through hole 12a in which the wire 11 of the flat washer 12 fixed between the double nuts 7 is not fastened, and pulled the wire 11 so as not to be loose. The clip 13 is fixed later.
As a result of the operations up to this point, the annular wire 11 hung on the counterweight 1 is attached to the lower end portion of the through bolt 6.

  Next, as shown in FIG. 3D, the elevator car 20 is manually moved so that the elevator car 20 is aligned with the upper beam 2a of the counterweight 1, and stopped. The worker 21 removes the double nut 7 attached to the upper end of the through bolt 6. Then, although the through bolt 6 tends to fall downward, the wire 11 of the removal jig 10 is annular, so that the ring is caught by the upper beam 2a and stopped.

  Next, as shown in FIGS. 4A, 4B, and 4C, after the elevator car 20 is manually moved so that the top of the elevator car is aligned with the lower beam 2b of the counterweight 1, the worker 21 By loosening or tightening the clip 13 while holding the through bolt 6, the through bolt 6 is lowered by its own weight while feeding the wire 11 little by little. Further, the through bolt 6 can be completely removed from the frame 4 of the counterweight 1 by appropriately moving the elevator car 20 downward as the through bolt 6 is lowered. After the extraction, the through bolt 6 is moved onto the car and the clip 13 is removed. The double nut 7 of the removed through bolt 6 is removed, and the flat washer 12 is removed.

  In the above operation, only one through bolt 6 is removed. However, for example, if the counterweight 1 shown in FIG. 1 is used, two through bolts 6 may be removed simultaneously. In that case, it is only necessary to prepare as many removal jigs 10 as the number of through bolts 6.

  The elevator counterweight through-bolt removal method according to the present invention can attach the removal jig 10 on the elevator car 20, remove the double nut 7 or remove the through-bolt 6, so there is no need to assemble a scaffold. It is only necessary to manually move the counterweight several times, and the counterweight 1 can be safely disassembled.

Next, a procedure for attaching the through bolt 6 to the counterweight 1 using the removing jig 10 will be described.
First, the elevator car 20 is manually moved and stopped so that the car is aligned with the upper beam 2a of the counterweight 1. Then, the worker 21 hangs the wire 11 so as to straddle the upper beam 2a so that the flat washer 12 is positioned below the lower beam 2b of the counterweight 1 by the length of the through bolt 6.

Next, the elevator car 20 is manually moved so as to be lower than the lower beam 2b of the counterweight 1 by the length of the through bolt 6 and stopped. Then, the worker 21 removes the lower nut of the double nut 7, puts the flat washer 12 into the bolt 6 from the lower end, and tightens the nut to fix the flat washer 12 between the double nuts 7.
Next, the worker 21 inserts the upper end of the through bolt 6 into the through hole of the lower beam 2b.
Next, the worker 21 inserts the end portion of the wire 11 into another through hole 12a to which the wire 11 of the flat washer 12 fixed between the double nuts 7 is not fastened, so that the wire 11 is not loosened. Then, the clip 13 is fixed.

  Next, the worker 21 raises the through bolt 6 while gradually pulling the wire 11 by loosening or tightening the clip 13 while holding the through bolt 6. Further, the through bolt 6 is inserted into the frame 4 of the counterweight 1 by appropriately moving the elevator car 20 upward along with the rise of the through bolt 6.

Next, after the elevator car 20 is manually moved and stopped so that the car on the elevator car 20 is aligned with the upper beam 2 a of the counterweight 1, the worker 21 attaches the double nut 7 to the upper end of the through bolt 6.
Next, after the elevator car 20 is manually moved and stopped so that the top of the elevator car 20 is aligned with the lower beam 2b of the counterweight 1, the worker 21 of the double nut 7 at the lower end of the through bolt 6 Remove the lower nut, pass the flat washer 12 through the bolt 6 from the lower end, and retighten the nut.

  The elevator counterweight through bolt according to the present invention can be attached to the elevator car by attaching a removal jig, removing a double nut, or attaching a through bolt. You can move the balance weight safely.

  In the above-described embodiment, as a method of passing the wire to the counterweight, the method of hanging the wire on the upper frame and hanging along the both side surfaces of the counterweight has been described, but the present invention is not limited to this. A method of hanging along the weight plate along the weight plate or a method of hanging the wire over the upper frame and hanging the end of one wire between the upper frame and the weight plate along one side of the weight plate may be used.

  In addition, as an example of engaging one end of the wire with one end of the bolt, the example in which the flat washer is sandwiched between the double nuts fastened to the lower end of the bolt has been described. It is not limited to this as long as it can be attached to, for example, a bag may be put on the lower end of the bolt, or one end of the wire may be tied in a ring, the ring passed through the lower end of the bolt, and tightened with a separately prepared nut May be.

  In addition, as a means for making a wire ring, the method of sandwiching the wire with a clip that does not pass through the through hole of the flat washer has been described. However, any method can be used as long as the wire ring can be made temporarily. May be tied together or a carabiner may be used.

  1 counterweight, 2a, 2b beam, 3 columns, 4 frame, 5 weight plate, 6 through bolt, 7 double nut, 8 pulley, 10 removal jig, 11 wire, 12 flat washer, 12a, 12b through hole, 13 clip , 20 elevator car, 21 workers.

Claims (2)

In the method of removing the elevator counterweight through-bolt that removes the through-bolt that prevents rampage of the elevator weight balance plate,
A procedure for attaching the engaging means provided on the wire of the removal jig to the lower end of the through bolt;
A procedure for passing the wire over the counterweight;
A procedure for temporarily holding the middle of the wire by a holding means in the vicinity of the attachment means of the wire to make a ring;
The procedure for removing the nut tightened on the upper end of the through-bolt,
A procedure for lowering the through bolt by its own weight while sequentially holding the other portions of the wire by the holding means so that the size of the ring of the wire becomes longer sequentially;
A method of removing an elevator counterweight through-bolt characterized by comprising: In the installation method of the elevator counterweight through-bolt that attaches the through-bolt that prevents rampage of the elevator counterweight weight plate,
The procedure for hanging the wire of the removal jig over the counterweight,
A procedure for attaching the engaging means provided on the wire to the lower end of the through bolt;
The procedure for inserting the upper end of the through bolt into the through hole of the weight plate from below,
A procedure for temporarily holding the middle of the wire by a holding means in the vicinity of the attachment means of the wire to make a ring;
A procedure of raising the through-bolt while sequentially holding the other portions of the wire with the holding means so that the size of the ring of the wire is sequentially shortened;
The procedure for tightening the nut on the upper end of the through-bolt,
A method of attaching an elevator counterweight through-bolt characterized by comprising:

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