JP2016155616A - Vertical frame replacement method and vertical frame replacement tool of balance weight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel vertical frame replacement method and a novel vertical frame replacement tool of a balance weight without losing workability.SOLUTION: A vertical frame replacement method of a balance weight including a pair of left and right vertical frames, an upper beam for connecting the vertical frames on an upper side, a lower frame for connecting the vertical frames on a lower side, and a laminate weight stored in a space including the vertical frames, the upper beam and the lower beam includes the step (S1) of lowering the balance weight to the pit of a hoistway to come into contact with a buffer installed on the pit, the step (S3) of fitting a weight presser between a fitting plate provided on the upper beam and a fixing tool provided in the bottom surface of the balance weight, the step of releasing the connection of the upper beam, the lower beam, and the left and right vertical frames to remove the vertical frames, the step (S5) of connecting prepared replacement vertical frames to the upper beam and the lower beam, and the step (S9) of removing the weight presser.SELECTED DRAWING: Figure 3

Description

  Embodiments described herein relate generally to a counterweight replacement method and a vertical frame replacement jig for a counterweight.

  In the weight frame at the time of renewal, when the seismic standards are reviewed, the strength standards may not be satisfied. In addition, when the car weight increases after renewal, the existing weight frame may not have enough height, and the weights may not be stacked. For these reasons, all the weight frames were exchanged during the current renewal.

JP 2011-79615 A

  However, the strength of the vertical frame becomes a problem in the weight frame replacement operation. Further, in order to replace all the weight frames, it is necessary to remove all the existing weights, which causes a problem that workability is poor.

  An object of the present invention is to provide a new vertical frame replacement method for a counterweight and a vertical frame replacement jig without impairing workability.

  In order to achieve the above object, an embodiment of the present invention includes a pair of left and right vertical frames, an upper beam that connects the vertical frames on the upper side, a lower frame that connects the vertical frames on the lower side, a vertical frame, A vertical frame exchange method for a counterweight with a laminated weight housed in a space composed of an upper beam and a lower beam, the counterweight being lowered to the pit of the hoistway and installed in the pit A step of contacting on the shock absorber, a step of attaching a weight presser between a mounting plate provided on the upper beam and a fixture provided on a bottom surface of the counterweight, and the upper beam and the lower beam A step of removing the vertical frame by releasing the connection with the vertical frame, a step of connecting the prepared vertical frame to the upper beam and the lower beam, and a step of removing the weight presser. It is characterized by that.

  Further, another aspect is a vertical frame replacement jig for a counterweight used in a method for replacing the vertical frame of the counterweight, and is provided on a fixture provided on the bottom surface of the counterweight and an upper beam of the counterweight. And a weight retainer for connecting the fixed plate and fixing the laminated weight.

Embodiment 1 of the vertical frame replacement | exchange method of a counterweight and the jig | tool for vertical frame replacement | exchange is shown, (A) is a top view, (B) is a side view. Sectional drawing along the AA of FIG. 1 (A). The flowchart which shows the exchange procedure of a vertical frame. Embodiment 2 of the vertical frame replacement | exchange method of a counterweight and the jig | tool for vertical frame replacement | exchange is shown, (A) is a top view, (B) is a side view. Sectional drawing along the BB line of FIG. 4 (A). Embodiment 3 of the vertical frame replacement | exchange method of a counterweight and the jig | tool for vertical frame replacement | exchange is shown, (A) is a top view, (B) is a side view. Sectional drawing along CC line of FIG. 6 (A). Embodiment 4 of the vertical frame replacement | exchange method of a counterweight and the jig | tool for vertical frame replacement | exchange is shown, (A) is a top view, (B) is a side view. Sectional drawing along the DD line | wire of FIG. 8 (A).

  The present invention aims to save labor in replacing the weight frame, and proposes a structure in which the weight frame replacement part is narrowed down to the vertical frame, which is often problematic in terms of strength. Further, the present invention aims to shorten the work time and improve the safety by making it possible to omit the entire unloading work of the existing weight that is generated as a work when replacing all the weight frames.

<Embodiment 1>
1A and 1B show Embodiment 1 of a vertical frame exchanging method and a vertical frame exchanging jig for a counterweight, wherein FIG. 1A is a plan view and FIG. 1B is a side view. FIG. 2 is a cross-sectional view taken along line AA in FIG.

  The counterweight 1 shown in each figure is connected to a car (not shown) by a rope 3 and is provided so as to be movable in the vertical direction along the guide rails 5L and 5R as the car moves. .

  The counterweight 1 includes a weight frame 7 and a stacked weight 10 stacked in the weight frame 7. The weight frame 7 includes a pair of left and right vertical frames 9L and 9R having a horizontal cross section formed in a U-shape, an upper beam 11 that connects the vertical frames 9L and 9R upward, and the vertical frames 9L and 9R downward. And a lower beam 13 connected to each other. Rail guides 15L, 15R and 17L, 17R are provided at the upper and lower ends of the vertical frames 9L, 9R, respectively, and guide the counterweight 1 in the vertical direction along the guide rails 5L, 5R. FIG. 1 shows a state in which the upper rail guides 15L and 15R are removed.

  Weight insertion ports 19L and 19R are formed in the vertical frames 9L and 9R, and the stacking weight 10 is taken in and out from the weight insertion ports 19L and 19R.

  In the pit 21 of the hoistway, a shock absorber 23 having a shock absorbing function for receiving when the counterweight 1 is lowered from a predetermined position is installed.

  In the embodiment of the present invention, a method of exchanging the vertical frames 9L and 9R using the shock absorber 23 is provided. At that time, in order to prevent the stacked weight 10 from falling, the weight retainers 25L and 25R are attached between the upper beam 11 and the lower beam 13. That is, the weight retainers 25L, 25R are attached between the rail guide attachment plates 14L, 14R after the rail guides 15L, 15R are removed and the weight retainer attachment plates 27L, 27R provided on the bottom surface side of the counterweight 1. ing.

  The weight holding attachment plates 27L and 27R will be described. Since the rope 3 grows with time, the counter clearance between the counterweight 1 and the shock absorber 23 becomes small. Therefore, a metal spacer mounting plate 29 is provided on the bottom surface of the counterweight 1, and a wooden spacer is mounted on the spacer mounting plate 29 with bolts. When the rope 3 is extended, the plate thickness is changed. The spacer itself is removed to ensure a certain gap.

  In this embodiment, the weight presser mounting plates 27L and 27R are attached to the spacer mounting plate 29 after the spacer is removed. As shown in FIG. 2, the weight presser mounting plates 27 </ b> L and 27 </ b> R are rectangular metal plates having a thickness of about several millimeters, and are attached so that the tip portion projects forward from the lower beam 13. A bolt hole for attaching the bolt 28 is provided at the tip.

<Vertical frame replacement procedure>
Next, the procedure for replacing the vertical frame will be described with reference to FIG.

  As shown in FIG. 3, first, the counterweight 1 is lowered to the pit 21 constituting the bottom surface of the hoistway, and placed on the shock absorber 23 provided in the pit 21 (step S1).

  Next, the left and right rail guides 15L and 15R attached to the upper side of the upper beam 11 are removed. Since the left and right rail guides 15L and 15R are screwed onto the rail guide mounting plates 14L and 14R, the screws are loosened and removed. FIG. 1 shows a state in which the left and right rail guides 15L and 15R are removed. Further, the weight holding attachment plates 27L and 27R are attached to the bottom surface of the counterweight 1 (step S3).

  Next, the weight retainers 25L and 25R are attached between the upper beam 11 and the lower beam 13 (step S5). First, using the screw holes of the rail guide mounting plates 14L and 14R after the rail guides 15L and 15R are removed, the screws are fixed to the weight holding mounting plates 27L and 27R provided on the bottom side of the counterweight 1. The weight retainers 25L and 25R are fastened by bolts 28 using the holes.

  In this manner, when the stacking weight 10 is prevented from being displaced or dropped, the upper beam 11 and the lower beam 13 and the bolted portions of the vertical frames 9L and 9R are removed, and the vertical frames 9L and 9R are removed. At this time, the upper beam 11 is suspended from the rope 3. When the old vertical frames 9L and 9R are removed, the new vertical frames 9L and 9R are attached to the upper beam 11 and the lower beam 13 (step S7).

  When the replacement of the vertical frames 9L, 9R is completed, the bolts 28 of the weight presser mounting plates 27L, 27R are loosened, and the bolts of the rail guide mounting plates 14L, 14R are loosened to remove the weight pressers 27L, 27R (step S9). Finally, the rail guides 15L and 15R are attached to the rail guide attachment plates 14L and 14R (step S11).

  As described above, according to the first embodiment, by using the rail guide mounting plates 14L and 14R, the weight presser mounting plates 27L and 27R, and the weight pressers 25L and 25R, the vertical frames 9L and 9R can be easily replaced. It becomes possible. Further, the weight holders 25L and 25R can prevent the stacked weight 10 from popping out and falling off, and can restrict the movement of the counterweight 1 in the horizontal direction after the vertical frame is removed.

<Embodiment 2>
4A and 4B show a second embodiment of a vertical frame replacement method and a vertical frame replacement jig for a counterweight, wherein FIG. 4A is a plan view and FIG. 4B is a side view. FIG. 5 is a cross-sectional view taken along line BB in FIG. In each figure, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Only differences from the first embodiment will be described.

  In the first embodiment, the upper beam 11 after the vertical frames 9L and 9R are removed is suspended by the rope 3. In the second embodiment, the upper beam 11 is provided with weight frame upper beam supports 31L and 31R, and is fixed to the guide rails 5L and 5R so that the upper beam 11 does not shake, thereby suppressing the movement of the upper beam 11 in the horizontal plane. Like to do.

  As shown in FIG. 5, the weight frame upper beam supports 31L and 31R have a U-shaped horizontal cross section from a vertical side surface 32a and opposing surfaces 32b and 32b extending from both ends of the vertical side surface 32a and facing each other (U It is formed in a letter shape.

  In the replacement operation of the vertical frame, in step S3 of FIG. 3, after removing the left and right rail guides 15L and 15R attached to the upper side of the upper beam 11, the vertical side surface 32a is placed behind the guide rails 5L and 5R. The rail clip 33 is attached to the rail brackets 4L and 4R together with the guide rails 5L and 5R. Further, the facing surfaces 32 b and 32 b are fixed to the upper beam 11 by bolts 34. Except for the work of attaching the beam support 31L, 31R on the weight frame in step S3, the replacement work is performed in the same process as in the first embodiment. When the replacement work is completed, the weight frame upper beam supports 31L and 31R are removed from the guide rails 5L and 5R.

  As described above, according to the second embodiment, the upper beam 11 is not simply suspended by the rope 3, but is fixed to the guide rails 5L and 5R so that the upper beam 11 is not shaken by the weight beam upper beam supports 31L and 31R. The entire weight frame 7 can be prevented from shaking or falling down, and the replacement work of the vertical frames 9L and 9R can be performed quickly and efficiently.

<Embodiment 3>
6A and 6B show a third embodiment of a vertical frame replacement method and a vertical frame replacement jig for a counterweight, wherein FIG. 6A is a plan view and FIG. 6B is a side view. FIG. 7 is a cross-sectional view taken along the line CC in FIG. In each figure, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Only differences from the first embodiment will be described.

  The stacked weights 10 of Embodiments 1 and 2 did not protrude from the weight frame 7 and almost fit within the frame. However, the stacked weight 10A of Embodiment 3 has a wide depth width that protrudes before and after the weight frame 7. The thing is adopted. The laminated weight 10A is fixed by a through bolt 36.

  For this reason, when exchanging the vertical frames 9L and 9R, the following replacement jig is used. That is, in the third embodiment, the weight holding plate 37 having a L-shaped vertical section, a pair of weight holding plates 39L and 39R, and rail fixing portions 41L and 41R are provided as replacement jigs.

  The weight holding plate 37 is bent substantially horizontally from the back surface portion 37a covering the back surface of the laminated weight 10A, the upper surface portion 37b covering the upper surface of the laminated weight 10a, and substantially vertically downward from the upper surface portion 37b. It is bent and is formed in an inverted J shape from the front surface portion 37c that covers the front surface of the laminated weight 10A. The back surface portion 37a has a length that is at least half the height of the stacking weight 10A. In FIG. 6B, the back surface portion 37a covers up to 10 layers of the stacking weight 10A and the front surface portion 37c covers up to 3 layers. However, the present invention is not limited to this. The area to be covered is not limited as long as it can be prevented from popping out.

  The weight retainers 39L and 39R are formed of a long metal plate having an L-shaped vertical cross section, and the upper end side is fixed by a bolt 36 on the upper surface portion 37b of the weight retainer plate 37, and the lower end side is attached with a weight retainer. It is fixed to the plates 27L and 27R.

  As shown in FIG. 7, the rail fixing portions 41L and 41R are composed of a side surface 42a and a back surface 42b bent substantially 90 degrees from the side surface 42a. The side surface 42a is fixed to the guide rails 5L and 5R, while the back surface 42b is The weight 38 is fixed to the back surface portion 37 a of the weight holding plate 37 by the bolt 38.

  Next, a method for replacing the vertical frame in the above configuration will be described.

  In the third embodiment, when replacing the vertical frame, the rail fixing portions 41L and 41R are first attached to the guide rails 5L and 5R without removing the rail guide. Next, the weight holding plate 37 is attached so as to cover the upper part of the laminated weight 10A, and the back surface portion 37a of the weight holding plate 37 and the back surfaces 42b of the rail fixing portions 41L and 41R are fastened with bolts 38.

  Next, the upper ends of the weight retainers 39L and 39R are fixed to the upper surface portion 37b of the weight retainer plate 37 by the bolts 36, and the lower ends are fixed to the weight retainer mounting plates 27L and 27R. The weight holding work is completed by the processing so far.

  Next, as in the first embodiment, the replacement work of the vertical frames 9L and 9R is performed. When the replacement work is completed, the bolts 28 of the weight presser mounting plates 27L and 27R are loosened and the bolt 36 is loosened to remove the weight pressers 39L and 39R (step S9 in FIG. 3). Finally, the weight holding plate 37 and the rail fixing portions 41L and 41R are removed from the guide rail.

  That is, in the third embodiment, a vertical cross section is formed from the step of lowering the counterweight 1 to the pit 21 of the hoistway and contacting it on the shock absorber 23 installed in the pit 21, The weight holding plate 37 formed in an inverted J shape is covered from above the laminated weight 10A, and the weight holding plate 37 is fixed to the guide rails 5L and 5R by the rail fixing portions 41L and 41R. Attaching the weight retainers 39L, 39R between the upper surface portion 37b and the weight retainer mounting plates 27L, 27R provided on the bottom surface of the counterweight 1, the upper beam 11, the lower beam 13, and the left and right vertical frames 9L, 9R; The step of removing the vertical frames 9L and 9R, the step of connecting the prepared vertical frame to the upper beam 11 and the lower beam 13, and the weight retainers 39L and 39R. Disconnect, weight pressing plate 37 and the rail fixing portion 41L, characterized in that it comprises a step of removing and 41R, the.

  As described above, according to the third embodiment, by using the rail guide mounting plates 14L and 14R, the weight presser mounting plates 27L and 27R, and the weight pressers 39L and 39R, the vertical frames 9L and 9R can be easily replaced. It becomes possible. Further, since the weight frame 7 is fixed by the rail fixing portions 41L and 41R, the movement of the weight frame 7 in the horizontal plane can be suppressed. Furthermore, the weight holding plate 37 can flexibly cope with a change in the size of the stacked weight 10A by changing the depth of the upper surface portion 37b.

<Embodiment 4>
FIGS. 8A and 8B show a fourth embodiment of a vertical frame replacement method and a vertical frame replacement jig for counterweights, where FIG. 8A is a plan view and FIG. 8B is a side view. FIG. 9 is a cross-sectional view taken along the line DD in FIG. In each figure, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Only differences from the first embodiment will be described.

  In the fifth embodiment, the laminated weight 10B in which a through hole is formed in the laminated weight is targeted, and the through bolts 43L and 43R are attached to the through hole of the laminated weight 10B together with the weight holding fixing plate 45. The weight holding plate 45 is attached to the guide rails 5L and 5R to fix the weight of the weight frame 7.

  The weight holding fixing plate 45 is formed by extending a back surface 45a, a side surface 45b formed by bending both ends of the back surface 45a at approximately 90 degrees, and a center portion of the back surface 45a and bending at approximately 90 degrees. And an upper surface portion 45c.

  When exchanging the vertical frames 9L and 9R, without removing the rail guides 15L and 15R, first, the weight holding fixing plate 45 is first attached to the guide rails 5L and 5R, and then from the through hole of the laminated weight 10B. By passing through the through bolts 43L and 43R and tightening the nut on the bottom side of the counterweight 1, the weight holding operation is completed. Next, as in the first embodiment, after the vertical frames 9L and 9R are replaced, the through bolts 43L and 43R and the weight holding fixing plate 45 may be removed.

  That is, in the fourth embodiment, the step of lowering the counterweight 1 to the pit 21 of the hoistway and bringing it into contact with the shock absorber 23 installed in the pit 21, the side surface portion 45b, the back surface portion 45a, and the upper surface portion 45c The weight holding fixing plate 45 is covered from above the laminated weight 10A, and the side surface portion 45b of the weight holding fixing plate 45 is fixed to the guide rails 5L and 5R, and the weight holding fixing plate 45 is attached. Through bolts 45L and 45R are inserted into the laminated weight 10A in the through holes previously drilled in the vertical direction in the laminated weight 10A, and the upper surface portion 45c of the weight holding fixing plate 45 and the bottom surface of the counterweight 1 A step of connecting and fixing the upper beam 11 and the lower beam 13 to the left and right vertical frames 9L and 9R, and removing the vertical frames 9L and 9R. Connecting the upper beam 11 and the lower beam 13 to each other, removing the through bolts 45L and 45R, releasing the connection between the upper surface portion 45c of the weight holding fixing plate 45 and the bottom surface of the weight 1, and the weight holding member And a step of removing the fixing plate 45 from the guide rail.

  As described above, according to the fourth embodiment, the vertical frames 9L and 9R can be exchanged by a simple operation.

  According to each of the embodiments described above, it is possible to exchange only the vertical frame with a simple operation while leaving usable parts among the parts constituting the counterweight. In the replacement operation, the stacking weight unloading operation can be omitted, so that the construction period can be shortened and the unloading operation can be suppressed to a minimum, so that workability 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 scope 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 3 ... Rope, 4L, 4R ... Rail bracket, 5L, 5R ... Guide rail, 7 ... Weight frame, 9L, 9R ... Vertical frame 9L, 9R, 11 ... Upper beam, 13 ... Lower beam, 14L, 14R ... Rail guide mounting plate, 15L, 15R ... Rail guide, 19L, 19R ... Weight insertion port, 21 ... Pit, 23 ... Shock absorber, 27L, 27R ... Weight presser mounting plate, 28 ... Bolt, 29 ... Spacer mounting plate, 32a ... Vertical surface, 32b, 32b ... Opposing surface, 33 ... Rail clip, 34 ... Bolt, 36 ... Bolt, 36 ... Through bolt, 37 ... Weight retainer plate, 37a ... Back portion, 37b ... Upper surface portion, 37c ... Front portion , 38 ... bolts, 39L and 39R ... weight retainers, 41L and 41R ... rail fixing portions, 42a ... side faces, 42b ... back faces, 43L and 43R ... through bolts, 45 ... fixing plates, 4 L ... upper surface portion, 45a ... the rear section, 45b ... the side portion

Claims (9)

  A pair of left and right vertical frames, an upper beam that connects the vertical frames on the upper side, a lower frame that connects the vertical frames on the lower side, and a space formed by the vertical frame, the upper beam, and the lower beam. A vertical frame exchange method for a counterweight with a laminated weight, the step of lowering the counterweight to a pit of a hoistway and bringing it into contact with a shock absorber installed in the pit, provided in the upper beam Attaching a weight retainer between the mounting plate and the fixture provided on the bottom surface of the counterweight, and removing the vertical frame by releasing the connection between the upper and lower beams and the left and right vertical frames. A balance weight vertical frame exchanging method comprising: a step, a step of connecting the prepared vertical frame for replacement with the upper beam and the lower beam, and a step of removing the weight presser.   The rail guide provided on the upper beam of the counterweight and guiding the counterweight along the guide rail is removed from the rail guide mounting plate, and the rail guide mounting plate after the rail guide is removed is used as the mounting plate. The balance weight vertical frame replacement method according to claim 1, wherein the fixture uses a spacer mounting plate that adjusts a distance from the shock absorber.   The balance weight according to claim 1, further comprising a step of fixing the upper beam and the guide rail by a beam support on the weight frame so that the upper beam after the vertical frame is removed does not swing. How to replace the vertical frame.   A pair of left and right vertical frames, an upper beam that connects the vertical frames on the upper side, a lower frame that connects the vertical frames on the lower side, and a space formed by the vertical frame, the upper beam, and the lower beam. A vertical frame exchange method for a counterweight with a stacking weight, the step of lowering the counterweight to the pit of the hoistway and contacting the shock absorber installed in the pit, and a front surface portion and an upper surface portion. A step of covering a weight holding plate having a vertical cross section formed in an inverted J shape from the back side from above the laminated weight, and fixing the weight holding plate to the guide rail by a rail fixing portion; and A step of attaching a weight retainer between the upper surface portion and a fixture provided on the bottom surface of the counterweight, and a step of removing the vertical frame by releasing the connection between the upper and lower beams and the left and right vertical frames And the prepared vertical frame for replacement and the above A step of connecting the beams and the lower beam, the removal of the weight pressing, vertical frame exchange method counterweight, characterized in that it comprises a step of removing said weight pressing plate and the rail fixing part.   A pair of left and right vertical frames, an upper beam that connects the vertical frames on the upper side, a lower frame that connects the vertical frames on the lower side, and a space formed by the vertical frame, the upper beam, and the lower beam. A vertical frame exchange method for a counterweight with a laminated weight, the step of lowering the counterweight to the pit of the hoistway and contacting it on a shock absorber installed in the pit, and a side surface portion and a back surface portion. The weight holding fixing plate integrated with the upper surface portion is covered from above the laminated weight, the step of fixing the side surface portion of the weight holding fixing plate to the guide rail, and the weight holding fixing plate are attached. Inserting a through bolt into a through-hole previously drilled in the vertical direction in the laminated weight, and connecting and fixing the upper surface portion of the weight holding fixing plate and the bottom surface of the counterweight; The upper and lower beams and the left and right vertical frames Removing the vertical frame and removing the vertical frame; connecting the prepared replacement vertical frame to the upper beam and the lower beam; and removing the through bolt and the upper surface of the weight holding fixing plate A method for replacing the balance weight with a vertical frame, comprising: a step of releasing the connection between the portion and the bottom surface of the balance weight, and a step of removing the weight holding fixing plate from the guide rail.   A balance weight vertical frame exchanging jig used in the counterweight vertical frame exchanging method according to claim 1, wherein the fixture is provided on a bottom surface of the counterweight and an upper beam of the counterweight. A balance weight vertical frame replacement jig, comprising: a mounting plate; and a weight presser for connecting the fixing tool to fix the laminated weight.   The balance weight vertical frame replacement according to claim 6, further comprising a weight frame upper beam support for fixing the upper beam and the guide rail so that the upper beam after the vertical frame is removed does not shake. jig.   5. A counterweight vertical frame replacement jig used in the counterweight vertical frame replacement method according to claim 4, wherein a vertical section is formed in an inverted J shape from a front surface portion, an upper surface portion, and a rear surface portion. A weight holding plate, a rail fixing portion that is connected to the weight holding plate and fixes the weight holding plate to the guide rail, and a fixture provided on an upper surface portion of the weight holding plate and a bottom surface of the counterweight. A jig for replacing a vertical frame of a counterweight, characterized by comprising a weight presser mounted between them.   A balance weight vertical frame replacement jig used in the balance weight vertical frame replacement method according to claim 5, wherein a side surface portion, a back surface portion, and an upper surface portion are integrally formed, and the upper portion of the stacked weight. In the state where it is covered, the side portion is inserted into a weight holding fixing plate fixed to the guide rail, and a through-hole previously drilled in the vertical direction in the laminated weight to which the weight holding fixing plate is attached, A balance weight vertical frame changing jig comprising: a bolt for connecting and fixing the upper surface portion of the weight holding fixing plate and the bottom surface of the balance weight.

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