CN109230924B

CN109230924B - Exchanging method for counterweight housing and exchanging clamp

Info

Publication number: CN109230924B
Application number: CN201810549235.4A
Authority: CN
Inventors: 后吕成彦
Original assignee: Toshiba Elevator Co Ltd
Current assignee: Toshiba Elevator and Building Systems Corp
Priority date: 2017-07-10
Filing date: 2018-05-31
Publication date: 2021-01-01
Anticipated expiration: 2038-05-31
Also published as: JP2019014588A; CN109230924A; JP6377816B1

Abstract

Provided are a method for exchanging a heavy rack and an exchange jig, by which the exchange work of the heavy rack can be efficiently performed and the work load of an operator can be reduced. The method comprises the steps of (ST 1-ST 4) after the counterweight is lowered to the vicinity of a pit of the hoistway along a guide rail, detaching the counterweight from the guide rail; the detached pair of heavy loads is fixed onto a table provided at a position spaced apart from the guide rail by a prescribed distance in the horizontal direction (ST 5). Next, lowering the exchange counterweight housing mounted on the guide rail to a position of the counterweight on the mounting table (ST 6); the stacked counterweight stacked in the counterweight is transferred to the counterweight housing for exchange while adjusting the height position (ST7, ST 8).

Description

Exchanging method for counterweight housing and exchanging clamp

Technical Field

The embodiment of the invention relates to a method for exchanging a heavy rack and an exchanging clamp.

Background

A counterweight constituting an elevator includes a counterweight frame and a counterweight (also referred to as a "laminated counterweight") incorporated in the counterweight frame. The exchange of heavy racks is required for the purpose of enduring years of use, strengthening by legal correction, etc.

Conventionally, in exchange of a counterweight housing, after a counterweight is lowered into a pit of a hoistway, the loaded counterweight is first discharged to a floor of the hoistway and temporarily placed. Next, the old counterweight housing is detached from the guide rail, and the replacement counterweight housing is moved along the guide rail to the pit. Next, the temporarily placed counterweight is loaded into the replacement counterweight housing again.

Patent document 1: japanese patent laid-open No. 9-40326

Disclosure of Invention

As described above, in the conventional counterweight housing exchange method, the operation of lowering the counterweight from the old counterweight housing and then loading the counterweight into the counterweight housing for exchange is required, and the operation of transporting the counterweight needs to be performed 2 times. Therefore, the burden on the operator increases, and improvement thereof is desired.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a method of exchanging a heavy rack and an exchange jig, which can efficiently perform an exchange operation of the heavy rack and can reduce a work load on an operator.

The technical scheme for achieving the aim is an exchange method of a counterweight housing, which is characterized in that after a counterweight is lowered to the vicinity of a pit of a hoistway along a guide rail, the counterweight is detached from the guide rail; fixing the removed pair of heavy-load devices on a placing table provided at a position spaced apart from the guide rail by a predetermined distance in a horizontal direction; lowering an exchange counterweight housing mounted on the guide rail to a position of the counterweight on the mounting table; the stacked counterweight stacked in the counterweight is transferred to the exchange counterweight housing.

Another aspect of the present invention is a jig for exchanging a counterweight housing used when transferring a stacked counterweight stacked in a counterweight to an exchange counterweight housing, the jig comprising an offset jig including a support arm attached to horizontal directions of left and right guide rails and a mounting table mounted on the support arm for mounting the counterweight detached from the guide rails.

Drawings

Fig. 1 is a front view showing the overall structure of the counterweight.

Fig. 2 is an explanatory view showing a cross section taken along line a-a of fig. 1.

Fig. 3 is an explanatory view showing the counterweight housing removed from the guide rail and placed on the jig for offset.

Fig. 4 is an explanatory diagram showing the structure of the offset jig.

Fig. 5 is an explanatory view showing a state in which the work table is attached to the guide rail.

Fig. 6 is a diagram illustrating a method of exchanging racks according to embodiment 1.

Fig. 7 is a diagram illustrating a method of exchanging racks according to embodiment 1.

Fig. 8 is an explanatory diagram showing a processing procedure of the rack swapping method according to the embodiment.

Fig. 9 is an explanatory diagram of the double rack exchange method according to embodiment 2.

Fig. 10 is a diagram illustrating a method of exchanging racks according to embodiment 3.

Fig. 11 is an explanatory diagram of the double rack exchange method according to embodiment 4.

Detailed Description

< embodiment 1 >

First, the overall structure of the counterweight will be described with reference to fig. 1.

As shown in fig. 1, a counterweight 1 is connected to a car (not shown) by a wire rope 2, and moves in the vertical direction along

guide rails

3L and 3R in accordance with the movement of the car.

The counterweight 1 includes a counterweight housing 4 and a laminated counterweight 5 laminated in the counterweight housing 4. The counterweight housing 4 includes a pair of right and left straight frames 6L, 6R having a horizontal cross section formed in a shape of "コ", an upper beam 7 connecting the straight frames 6L, 6R to each other at the upper side, and a lower beam 8 connecting the straight frames 6L, 6R to each other at the lower side.

Guide shoes

9L, 9R and 10L, 10R are provided at the upper and lower ends of the straight frames 6L, 6R, respectively, and guide the counterweight 1 in the vertical direction along the

guide rails

3L, 3R.

A pit 11 in the hoistway is provided with a buffer 12 having a buffering function for receiving the counterweight 1 at a position lower than a predetermined position. Fig. 2 shows a cross section along line a-a of fig. 1.

Fig. 3 shows a state where the counterweight 1 shown in fig. 2 is removed from the

guide rails

3L and 3R and placed on the jig for offset 15. Fig. 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. In fig. 3, reference numeral 21L denotes a table provided outside the left guide rail 3L. The work table will be described later with reference to fig. 5.

Fig. 4 shows a state in which the offset jig 15 is attached to the

guide rails

3L and 3R, fig. 4(a) is a plan view, fig. 4(B) is a front view, and fig. 4(C) is a right side view.

The offset jig 15 includes a pair of left and

right support arms

16L, 16R extending in the horizontal direction from the

guide rails

3L, 3R, and a mounting table 17 provided at a position spaced apart from the

guide rails

3L, 3R by a predetermined distance in the horizontal direction and bridged between the

support arms

16L, 16R. As is clear from fig. 4(B), the

support arms

16L, 16R are formed of angle steel having an L-shaped cross section, and are attached to the

guide rails

3L, 3R by the rail pressure guide 18. As is clear from fig. 4(C), the mounting table 17 is made of channel steel having a U-shaped cross section, and is attached to the

support arms

16L and 16R by fastening bolts and nuts 20. A counterweight fixing bolt 19 is provided in advance on the upper surface of the mounting table 17, and the counterweight 1 that is detached from the

guide rails

3L and 3R and is offset is fixed. Fig. 3 shows a state in which the counterweight 1 is fixed to the mounting table 17.

Fig. 5 shows a state in which the work tables 21L, 21R are mounted on the outer sides of the

guide rails

3L, 3R, fig. 5(a) is a plan view, and fig. 5(B) is a front view.

As is apparent from this drawing, the work tables 21L and 21R are made of flat steel plates, and are fixed to the

guide rails

3L and 3R by guide rail pressure guides, bolts, and the like in a state in which a part thereof is placed on the mounting table 17. The surfaces of the work tables 21L and 21R are subjected to anti-slip processing, and anti-slip processing is performed for the workers working on the work tables 21L and 21R.

< method of exchanging racks >

Next, a method of exchanging the racks will be described based on the explanatory diagrams of fig. 3, 6, and 7 and the flowchart of fig. 8. In the following description, the counterweight 1 is also referred to as an old counterweight.

First, the offset jig 15 is attached to the

guide rails

3L and 3R. As described with reference to fig. 4, as the offset jig 15, the support arm 16L formed of an L-shaped angle steel in cross section is attached to the outside of the rail 3L, and the support arm 16R is attached to the outside of the rail 3R with the rail pressure guide 18 so as to be perpendicular to the

rails

3L and 3R, respectively. A mounting table 17 made of channel steel having a U-shaped cross section is stretched over the

support arms

16L, 16R attached to the left and

right guide rails

3L, 3R, and is fastened and fixed to the

support arms

16L, 16R by fastening bolts and nuts 20 (step ST 1).

Next, work tables 21L and 21R for the worker to ride on and perform work are attached to the outer sides of the

guide rails

3L and 3R. In the mounting work, the outer surfaces of the rails on both sides are mounted with rail guide plates, bolts, or the like (step ST 2).

Next, the counterweight 1 is lowered to the pit 11 (step ST 3).

Then, the counterweight 1 is removed from the

guide rails

3L and 3R and placed on the platform 17. In this operation, as shown in fig. 1, the

guide shoes

9R, 9L, 10R, and 10L provided at the upper, lower, left, and right positions 4 of the counterweight frame 4 of the counterweight 1 are removed from the counterweight 1 (step ST 4). Thereby, the counterweight 1 is released from the restraint of the

guide rails

3L, 3R. Each operator who gets on the left and right work tables 21L and 21R removes the counterweight 1 from the

guide rails

3L and 3R, shifts the counterweight, and places the counterweight on the platform 17. The mounted counterweight 1 is fixed to the mounting table 17 by the counterweight fixing bolts 19 (step ST 5). Through the above-described operation, as shown in fig. 3, the old counterweight 1 is removed from the

guide rails

3L and 3R, and is mounted on the mounting table 17 in a shifted state.

Next, the exchange counterweight housing 31 is mounted to the

guide rails

3L and 3R by being sandwiched between the guide shoes 32. As shown in fig. 6, the exchange counterweight housing 31 is hung by a chain pulley 33. The chain pulley 33 functions as a jig for adjusting the height position, and is connected to the wire 34. The wire rope 34 is hung on the rail brackets 36 mounted on the hoistway wall 35 (step ST 6).

The replacement counterweight housing 31 is lowered along the

guide rails

3L and 3R to the position of the old counterweight 1 fixed to the table 17. Next, the operator riding on the work tables 21L and 21R takes out the stacked counterweights 5 one by one from the counterweight housing 4 of the old counterweight 1 and transfers them to the counterweight housing 31 for exchange (step ST 8). In this operation, the chain pulley 33 is operated to adjust the height position so that the height position of the stacked counterweight 5 in the counterweight housing 31 for replacement and the height position of the stacked counterweight 5 in the counterweight housing 4 of the old counterweight 1 that has been shifted are as flush as possible. In this way, all the laminated counterweights 5 are transferred into the counterweight housing for exchange 31 from the state shown in fig. 6 through the state shown in fig. 7 (step ST 9).

Next, the wire rope 2 is detached from the old counterweight 1 and attached to the replacement counterweight housing 31 (step ST 10). The old counterweight 1 is removed from the shifting jig 15 and recovered (step ST 11). Finally, the offset jig 15 and the work tables 21L and 21R are removed, and the work ends (step ST 12).

In this way, according to embodiment 1, the old counterweight 1 is shifted to the shifting jig 15, and the laminated counterweight 5 is directly transferred from the old counterweight 1 into the counterweight housing 31 for replacement. Therefore, the operation of removing all the stacked counterweights 5 from the pit 11 and then transferring the stacked counterweights into the exchange counterweight housing 31 is not performed as in the conventional art, so that the efficiency of the exchange operation is improved and the workload on the operator is reduced.

Further, since the height position can be adjusted so that the height position of the stacked counterweight 5 in the exchange counterweight housing 31 and the height position of the stacked counterweight 5 in the offset counterweight housing 4 are as flush as possible, the workload of the operator can be further reduced.

< embodiment 2 >

Fig. 9 shows another configuration of a height position adjustment jig constituting the replacement jig according to embodiment 2.

In embodiment 1, the height position of the replacement counterweight housing 31 is adjusted by the chain pulley 33 as a height position adjusting jig.

In embodiment 2, as shown in fig. 9, a jack 41 is provided between the bottom surface of the pit 11 and the lower surface of the exchange counterweight housing 31, and the height position of the exchange counterweight housing 31 is adjusted by operating the jack 41 to move up and down.

According to embodiment 2, the height position of the stacked counterweight 5 in the counterweight housing 31 for replacement and the height position of the stacked counterweight 5 in the counterweight housing 4 of the old counterweight 1 that has been shifted can be made substantially flush with each other by moving the jack 41 up and down. Therefore, the operator can transfer the stacked counterweight 5 into the counterweight housing 31 for exchange only by sliding the stacked counterweight 5 in the lateral direction, and the efficiency of the transfer operation of the stacked counterweight 5 is improved.

< embodiment 3 >

Fig. 10 shows still another configuration of a height position adjustment jig constituting the replacement jig according to embodiment 3.

As shown in fig. 10, in embodiment 3, a spring 51 is provided between the bottom surface of the pit 11 and the lower surface of the exchange counterweight housing 31, and the height position of the exchange counterweight housing 31 is adjusted in accordance with the expansion and contraction of the spring 51. The spring 51 may be a compression spring, a conical spring, or the like. Further, by using the spring 51 having a spring constant corresponding to the weight of the stacked counterweight 5, the stacked counterweight 5 can be always sunk by a certain amount when being transferred to the exchange counterweight housing 31, and the height position of the stacked counterweight 5 in the exchange counterweight housing 31 can be made substantially flush with the height position of the stacked counterweight 5 in the counterweight housing 4 of the shifted old counterweight 1. Therefore, the operator can transfer the stacked counterweight 5 into the counterweight housing 31 for exchange only by sliding the stacked counterweight 5 in the lateral direction, and the efficiency of the operation of transferring the stacked counterweight 5 is improved.

< embodiment 4 >

Fig. 11 shows still another configuration of a height position adjustment jig constituting the replacement jig according to embodiment 4.

As shown in fig. 11, in embodiment 4, a pair of right and left brake devices 61 are provided on the lower surface side of the exchange bogie 31. The brake device 61 is provided with brake shoes 62 sandwiching the guide portions (portions where the

guide shoes

9L and 9R are in sliding contact) of the

guide rails

3L and 3R. During the transfer of the laminated counterweight 5, the brake shoes 62 are loosened at appropriate positions, and the height position of the counterweight housing 31 for exchange is adjusted to match the height position of the laminated counterweight 5 in the counterweight housing 4.

In this way, by using the braking device 61 as the jig for height position adjustment, the height position of the stacked counterweight 5 in the counterweight housing 31 for replacement can be made substantially flush with the height position of the stacked counterweight 5 in the counterweight housing 4 of the old counterweight 1 that has been shifted. Therefore, the stacked counterweight 5 can be transferred into the counterweight housing 31 for exchange only by the operator sliding the stacked counterweight 5 in the lateral direction, and the efficiency of the transfer operation of the stacked counterweight 5 is improved.

While the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments may be implemented in other various forms, and various omissions, substitutions, and changes may 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 also included in the invention described in the claims and the equivalent scope thereof.

Description of the reference symbols

1 counterweight; 2, a steel wire rope; 3L, 3R guide rails; 4 pairs of heavy racks; 5, stacking a counterweight; 6L; 6R straight frame; 7, upper beam; 8, lowering the beam; 9L, 9R, 10L, 10R guide shoes; 11, a well pit; 12 a buffer; 15 a jig for offset; 16L, 16R support arms; 17 a mounting table; 18 guide rail pressing guide plates; 19 a bolt for fixing the counterweight; 20 a bolt and a nut for fastening; 21L, 21R operation table; 31 exchange counterweight housing; 32 a guide shoe; 33 chain movable pulleys (height position adjusting jig); 34 a steel cord; 35 a well wall; 36 a rail bracket; 41 jacks (height position adjusting jigs); a 51 spring (jig for adjusting height position); 61 a brake device (height position adjusting jig); 62 brake shoes.

Claims

1. A method for exchanging a double rack is characterized in that,

the method comprises the steps of (1) after the counterweight is lowered to the vicinity of a pit of a hoistway along a guide rail, detaching the counterweight from the guide rail;

fixing the removed pair of heavy-load devices on a placing table, wherein the placing table is arranged at a position separated from the guide rail by a specified distance in the horizontal direction;

lowering an exchange counterweight housing mounted on the guide rail to a position of the counterweight on the mounting table;

the stacked counterweight stacked in the counterweight is transferred to the exchange counterweight housing.

2. The method for exchanging the double rack according to claim 1,

the stacked counterweight is transferred into the exchange counterweight housing while adjusting the height position of the exchange counterweight housing by using a height position adjusting jig.

3. A jig for exchanging a counterweight housing, which is used for transferring a laminated counterweight stacked in a counterweight to the counterweight housing for exchanging,

the offset jig comprises a support arm mounted in the horizontal direction of left and right guide rails and a mounting table mounted on the support arm for mounting a counterweight detached from the guide rails,

the height position adjusting jig is provided for adjusting the height position of the exchange counterweight housing.

4. The jig for exchange of double racks as set forth in claim 3,

the support arm is formed by mounting an angle steel with an L-shaped cross section on the guide rail;

the mounting table is made of U-shaped channel steel having a cross section and fixed to the support arm.

5. The jig for exchange of double racks according to claim 3 or 4,

the work table is mounted on the outer side of the guide rail and used for an operator to board and perform work.