JP7834787B2 - Elevator counterweight, method of constructing the same, and elevator - Google Patents

Description

This invention relates to elevator counterweights, a method for constructing them, and elevators.

A typical counterweight of this type comprises a pair of vertical frames and a weight. The pair of vertical frames are positioned opposite each other with a gap between them in the left-right direction. Each vertical frame has a pair of flanges running vertically. The weight has a total length longer than the distance between the pair of vertical frames, and is positioned and stacked between the pair of vertical frames so that each end is inserted between the pair of flanges.

The weights are sequentially inserted between a pair of vertical frames at an angle to the horizontal, then lowered and stacked while returning to a horizontal position. However, this configuration requires space between the pair of vertical frames to insert the weights at an angle to the horizontal, and the weights can only be stacked up to the point where this space is available.

Therefore, a structure has been proposed in which an opening (notch) is provided on the upper side of the flange (Figure 7 of Patent Document 1). In this case, the configuration method may be the same as above up to a certain point, but in the final stage, the weight is inserted horizontally between a pair of vertical frames so that each end passes through the opening, and then lowered and loaded in that state. This configuration method allows for an increase in loading capacity without increasing the overall height of the counterweight.

Japanese Patent Publication No. 2001-348176

However, even with this structure, from the perspective of preventing weight detachment, the weight is loaded to a height that does not reach the opening, and is not loaded to the height of the opening or higher. Therefore, the space above the weight at the height of the opening becomes wasted space.

Therefore, the present invention has been made in view of these circumstances, and aims to provide an elevator counterweight, a method for constructing the counterweight, and an elevator that can increase the load capacity by eliminating wasted space.

The elevator counterweight according to the present invention is
A pair of vertical frames are arranged opposite each other with a gap between them in the left-right direction, and the upper ends of the two plates are connected so as to sandwich each other in the center in the left-right direction, each having a pair of flanges along the vertical direction, and each having an opening on the upper side of the flange,
A weight having an overall length longer than the distance between a pair of vertical frames, positioned between a pair of vertical frames such that each end is inserted between a pair of flanges, and loaded to a height position that does not reach the opening,
A subweight having an overall length shorter than the distance between a pair of vertical frames, positioned on top of the weight such that each end does not overlap the flange, and stacked up to or above the height of the opening, the subweight having at least two holes that penetrate vertically,
It includes means for fixing subweights,
The means for securing the subweight is,
A base having an overall length longer than the distance between a pair of vertical frames, positioned on top of a weight with each end inserted between a pair of flanges, and on which a subweight is placed,
A pair of flanges are positioned opposite each other, and when viewed from the front, with the front-to-back direction being the front-to-back direction , the flanges are attached to each vertical frame at a height that overlaps with the opening, and a stopper that contacts the base from above to fix the base integrally with the weight,
A shaft protrudes upward from the base and is inserted into each hole of the subweight,
It comprises a fixing device attached to each shaft protruding from the subweight,
Stopper is,
A bracket that is attached to the vertical frame and has a screw hole that penetrates in the vertical direction,
It comprises a shaft with a head that is screwed into a screw hole so that the tip protrudes downward from the bracket,
This is an elevator counterweight that is attached to the vertical frame at a height where , when viewed from the front, the portion from the screw hole of the bracket to the head of the shaft with a head overlaps with the opening.

Furthermore, as one embodiment of the elevator counterweight according to the present invention,
The shaft of the means for fixing the subweight is a shaft without a head.
This configuration can be adopted.

Furthermore, the method for configuring the elevator counterweight according to the present invention is:
A process of loading weights, or a process of preparing a counterweight from which the weight fixing means has been removed,
The process of placing the base on top of the weight before attaching each shaft,
The process involves using a stopper to secure the base integrally with the weight,
A step of placing the sub-weight on the base so that each hole in the sub-weight aligns with the mounting point of the shaft on the base,
The process involves inserting each shaft into the respective holes of the subweight and attaching it to the base,
This is a method for constructing an elevator counterweight, comprising the step of attaching fixing devices to each shaft protruding from the subweight.

Furthermore, another method for configuring the elevator counterweight according to the present invention is:
A process of loading weights, or a process of preparing a counterweight from which the weight fixing means has been removed,
The process involves placing the base with each shaft attached onto the weight,
The process involves using a stopper to secure the base integrally with the weight,
The process of placing the subweights on the base while inserting each shaft into each hole,
This is a method for constructing an elevator counterweight, comprising the step of attaching fixing devices to each shaft protruding from the subweight.

Furthermore, the elevator according to the present invention is
As the elevator moves up and down within the hoistway,
This elevator is equipped with a counterweight connected to the car via a main rope, which moves up and down within the hoistway in conjunction with the car's movement.

According to this invention, a sub-weight is loaded in the space above the main weight at the height of the open section. Therefore, according to this invention, wasted space can be eliminated and the load capacity can be increased.

Figure 1 is a perspective view of the elevator. Figure 2 is a front view of the counterweight. Figure 3(a) is an enlarged view of section A in Figure 2. Figure 3(b) is a cross-sectional view taken along line B-B in Figure 3(a). Figure 4(a) is a cross-sectional view of the vertical frame of the counterweight. Figure 4(b) is a plan view of the base (and weight). Figure 4(c) is a plan view of the subweight. Figure 5 is an enlarged view of section C in Figure 3(a). Figures 6(a) to 6(f) are explanatory diagrams of the counterweight configuration method 1. Figures 7(a) to 7(f) are explanatory diagrams of the second method for constructing the counterweight. Figure 8 is an enlarged view of the portion of the counterweight corresponding to Figure 5 in another embodiment 1. Figure 9 is an enlarged view of the portion of the counterweight corresponding to Figure 5 in another embodiment 2. Figure 10 is an enlarged view of the portion of the counterweight corresponding to Figure 5 in another embodiment 3.

The elevator according to this embodiment will be described below.

As shown in Figure 1, the elevator 1 comprises a hoistway 2, a car 3, and a drive mechanism 4 for the car 3. The hoistway 2 extends vertically within a building with multiple floors. The car 3 moves up and down within the hoistway 2 by the drive mechanism 4, and stops at a designated floor when the drive mechanism 4 is deactivated.

The elevator car 3 is equipped with guide bodies 31, such as guide shoes and roller guides, on the upper and lower parts of the vertical frame 30. Within the hoistway 2, a pair of guide rails 20, 20 extending vertically are arranged on both sides of the elevator car 3. The elevator car 3 can move up and down within the hoistway 2, guided by the pair of guide rails 20, 20, with four guide bodies 31, ... on the top, bottom, left, and right sides.

The drive mechanism 4 comprises a cage sheave 40, a first overhead sheave 41, a hoisting machine 42, a second overhead sheave 43, a counterweight 5, a counterweight sheave 53, and a main rope 44. A sheave refers to a rope or pulley.

The cage sheave 40 is positioned at the bottom of the cage 3. The first overhead sheave 41 and the second overhead sheave 43 are positioned in the upper part (on the frame) of the hoistway 2. The hoisting machine 42 is positioned in the lower part of the hoistway 2. The counterweight 5 is positioned in the space formed between the wall of the hoistway 2 and the cage 3, and moves up and down within the hoistway 2. The counterweight 5 is equipped with guide bodies 51, such as guide shoes and roller guides, on the upper and lower parts of the left and right vertical frames 50, 50. Within the hoistway 2, a pair of guide rails 21, 21 extending vertically are positioned on both sides of the counterweight 5, allowing the counterweight 5 to move up and down within the hoistway 2 while being guided by the pair of guide rails 21, 21, with four guide bodies 51, ... in the upper, lower, left, and right directions. The counterweight sheave 53 is positioned on the upper frame 52 of the counterweight 5.

The main rope 44 has one end 44a fixed to the upper part (frame located in the hoistway 2), and is wrapped around the cage sheave 40, the first overhead sheave 41, the drive sheave of the hoisting machine 42 (not shown), the second overhead sheave 43, and the counterweight sheave 53. The other end 44b is fixed to the upper part (frame located in the hoistway 2). The main rope 44 travels as the drive sheave of the hoisting machine 42 rotates, causing the cage 3, to which the cage sheave 40 is attached, to move up and down within the hoistway 2. Similarly, the counterweight 5, to which the counterweight sheave 53 is attached, moves up and down within the hoistway 2 as the main rope 44 travels.

As shown in Figure 2, the counterweight 5 comprises a frame and multiple types of weights. The frame comprises the aforementioned pair of vertical frames 50, 50, an upper frame 52, and a lower frame 54. The weights comprise multiple weights 55 (55A, 55B), ..., one base 57, and multiple sub-weights 64 (64A), ...

A pair of vertical frames 50, 50 are positioned opposite each other with a gap between them in the left-right direction. The vertical frames 50 are constructed using structural steel. For example, the structural steel is channel steel. Alternatively, the structural steel may be H-beams or I-beams. In any case, each vertical frame 50 has a pair of flanges and a web running vertically. The pair of flanges are positioned opposite each other with a gap between them in the front-back direction (perpendicular to the plane of the paper in Figure 2). The web connects the pair of flanges. The space enclosed on three sides by the pair of flanges and the web is open on one side, and the vertical frames 50 are positioned so that this open side faces the other vertical frame 50.

The upper frame 52 connects the upper ends of a pair of vertical frames 50, 50. The upper frame 52 is plate-shaped and is provided in pairs, sandwiching the pair of vertical frames 50, 50. The counterweight sheave 53 is positioned between the two plates of the upper frame 52 and is rotatably mounted. The counterweight sheave 53 may have a lower edge that protrudes downward from the lower edge of the upper frame 52, or it may not protrude. This varies depending on the specifications. The lower frame 54 connects the lower ends of the pair of vertical frames 50, 50.

The weights 55 (55A, 55B), ..., base 57, and subweights 64 (64A), ... are housed within the frame and stacked vertically along the longitudinal direction of the vertical frame 50, and stacked along the vertical plane. As will be described later, since the weights 55 (55A, 55B), ..., base 57, and subweights 64 (64A), ... are plate-shaped, they are stacked vertically along the longitudinal direction of the vertical frame 50 within the frame, and stacked along the vertical plane.

As shown in Figures 3 and 4, each vertical frame 50 is provided with an opening 50c. The opening 50c is located on the upper side of the flange 50a on the front side of the vertical frame 50. The opening 50c is a notch that cuts out of the flange 50a from its leading edge toward the web 50b of the vertical frame 50. For example, the opening 50c is a vertically elongated rectangular notch. The opening 50c allows access to a portion of the space enclosed on three sides by the pair of flanges 50a, 50a and the web 50b from the front side of the counterweight 5.

The weight 55 has an overall length longer than the distance between the pair of vertical frames 50, 50 (the distance between the leading edge of the flange 50a of one vertical frame 50 and the leading edge of the flange 50a of the other vertical frame 50, hereinafter the same). The overall length of the weight 55 is (slightly) shorter than the opening length between the left and right openings 50c, 50c (the distance between the vertical edge of the opening 50c of one vertical frame 50 and the vertical edge of the opening 50c of the other vertical frame 50, hereinafter the same). The weight 55 is a flat plate shape having a predetermined thickness, and is also called a weight plate. The weight 55 is made of metal. For example, the weight 55 is made of steel. The weight 55 comprises a main body 55a and two ends 55b, 55b. The main body 55a has a rectangular shape in plan view. The main body 55a has a width greater than the width of the vertical frame 50 (the distance between the outer surfaces of the pair of flanges 50a, 50a; the same applies hereinafter). The end portion 55b is a protruding end portion with a width smaller than the width of the main body 55a. The end portion 55b has a width slightly smaller than the distance between the pair of flanges 50a, 50a (the distance between the inner surfaces of the pair of flanges 50a, 50a; the same applies hereinafter).

The weight 55 is positioned between a pair of vertical frames 50, 50, with each end 55b inserted between a pair of flanges 50a, 50a, and is stacked to a height that does not reach the left and right openings 50c, 50c. At this time, both side edges in the width direction of the end 55b are in contact with or close to the inner surfaces of the pair of flanges 50a, 50a, and the longitudinal edge of the main body 50a is in contact with or close to the leading edge of the flange 50a. Therefore, the weight 55's movement in the longitudinal and width directions is restricted.

Weight 55 comes in two thicknesses. Weight 55A, with its greater thickness, is the standard type. Weight 55B, with its smaller thickness (thin type), is primarily used for weight adjustment. Weight 55B is placed on top of weight 55A to bring the total weight of the counterweight 5 to the design value.

The base 57 is formed by creating an engagement hole 57c in the weight 55A. Therefore, the base 57 has the same shape as the weight 55A, is also called a base plate, and is made of the same material.

The base 57 is provided with two engagement holes 57c. The two engagement holes 57c, 57c are formed on a line parallel to the centerline in the width direction of the base 57, and are symmetrically positioned with respect to the centerline in the longitudinal direction of the base 57. The engagement holes 57c are holes that penetrate the base 57 in the vertical direction. Alternatively, the engagement holes 57c are stop holes with a bottom. For example, the engagement holes 57c are through-holes or stop holes with internal threads.

The base 57 is positioned on top of the weight 55, with each end 57b inserted between a pair of flanges 50a, 50a, and overlapping and in contact with the uppermost weight 55B. It is also integrally fixed with the weight 55, and the sub-weight 64 is positioned on top of it.

The subweight 64 has an overall length shorter than the distance between the pair of vertical frames 50, 50. The subweight 64 is a flat, plate-like shape with a predetermined thickness, and is also called a subweight plate. The subweight 64 is made of the same material as the weight 55. The subweight 64 comprises a main body 64a. The main body 64a has a rectangular shape in plan view. The main body 64a has a width greater than the width of the vertical frame 50, but a width smaller than the width of the main body 55a of the weight 55.

The subweight 64 is provided with through holes 64c at locations (two locations) corresponding to the engagement holes 57c, 57c of the base 57. The two through holes 64c, 64c are formed on the widthwise centerline of the subweight 64, and are symmetrically positioned with respect to the longitudinal centerline of the subweight 64. The through holes 64c are circular holes that penetrate the subweight 64 vertically.

The sub-weights 64 are positioned on top of the weight 55 such that their ends do not overlap the flange 50a, and the lowest sub-weight 64 is in contact with and overlapping the base 57. They are stacked up to the height of the left and right openings 50c, 50c, or higher.

The subweight 64 has one thickness. For example, the subweight 64 has the same thickness as the weight 55A. However, even in this case, the subweight 64 has a smaller overall length and width than the weight 55A, and a smaller area than the weight 55A, and is therefore lighter than the weight 55A. In this sense, the subweight 64 serves not only to increase the load capacity but also to adjust the weight.

As shown in Figure 5, the counterweight 5 includes a subweight fixing body 56 as a means for fixing the subweight 64, and a stopper 60 as a means for fixing the base 57.

The sub-weight fixing body 56 comprises the base 57 described above, a shaft 58, and a fixing device 59. The lower end of the shaft 58 is engaged with the engagement hole 57c of the base 57, integrating it with the base 57. Two shafts 58 are provided, corresponding to the two insertion holes 64c, 64c of the sub-weight 64. They protrude vertically upward from the corresponding locations on the base 57 and are inserted into each insertion hole 64c. For example, the shaft 58 is a fully threaded bolt or a stud bolt with threads at both ends, with its lower end screwed into the female thread of the engagement hole 57c. The fixing device 59 has a shape larger than the diameter of the insertion hole 64c and is attached to each shaft 58 protruding from the sub-weight 64 so as to abut the sub-weight 64 from above. For example, the fixing device 59 is a double nut, and washers or spring washers may be provided as needed.

The stopper 60 comprises a bracket 61, a shaft 62, and a fastener 63. The bracket 61 has two intersecting parts and is L-shaped. One part and the web 50b of the vertical frame 50 have two through holes through which the shaft of the fastener is inserted, and one part is detachably attached to the vertical frame 50. The web 50b of the vertical frame 50 has multiple through holes in the vertical direction. This allows one part to be attached in a height-adjustable position. The other part has a length that protrudes from between the tip edges of a pair of flanges 50a, 50a. The other part has one engagement hole 61a. The engagement hole 61a is a hole that penetrates the other part in the vertical direction. The engagement hole 61a is formed on the tip side of the other part, beyond the distance between the tip edges of the pair of flanges 50a, 50a. As an example, the engagement hole 61a is a female screw. The shaft 62 is engaged with the engagement hole 61a so that its lower side protrudes from the bracket 61, and the amount of protrusion of the protruding portion can be changed, thus integrating it with the bracket 61. For example, the shaft 62 is a hexagonal bolt, with its middle portion screwed into the female thread of the engagement hole 61a. The fastener 63 is attached to the portion of the shaft 62 protruding from the other part of the bracket 61, so as to abut against the other part from above. For example, the fastener 63 is a nut.

As described above, the weights 55, ... and the base 57 are restricted from movement in the left-right and front-back directions by a pair of vertical frames 50, 50, and upward movement (lifting) is restricted by the stopper 60 contacting the base 57 from above. The sub-weights 64, ... are also restricted from movement in the left-right and front-back directions by the shaft 58 and fixing device 59, and upward movement (lifting) is restricted by the fixing device 59.

The configuration of the elevator 1 and counterweight 5 according to this embodiment is as described above. Next, the method for configuring the counterweight 5 will be explained. There are two methods.

As shown in Figure 6, the first method comprises the following steps.
(Step 1) Step of preparing a counterweight 5 (Figure 6(a)) with the stopper 60 removed (Figure 6(b))
(Step 2) The step of placing (on) the base 57 on the weight 55 before attaching each shaft 58 (Figure 6(c))
(Step 3) Using the stopper 60 (reattaching it) to fix the base 57 integrally with the weight 55 (Figure 6(d))
(Step 4) The step of placing (mounting) the subweight 64 on the base 57 so that each hole in the subweight 64 aligns with the shaft mounting location on the base 57 (Figure 6(e)).
(Step 5) Inserting each shaft 58 through the holes in the subweight 64 and attaching it to the base 57 (Figure 6(f))
(Step 6) The step of attaching the fixing device 59 to each shaft 58 protruding from the subweight 64 (Figure 6(f))

The first method has the advantage of eliminating the cumbersome process of inserting each sub-weight 64 onto the shaft 58 one by one, and also reduces interference with the lower edge of the counterweight sheave 53 when it protrudes downward from the lower edge of the upper frame 52, allowing for the loading of more sub-weights 64.

Step 1 is for cases where, after the counterweight 5 has been constructed, it is found that the total weight is still insufficient, or where it becomes necessary to increase the total weight of the counterweight 5 due to the addition of some configuration to the cage 3 later. When a new counterweight 5 is installed, Step 1 is as follows. Steps 2 onwards are the same.
(Step 1) Step of loading the weight 55 (Figure 6(b))

As shown in Figure 7, the second method comprises the following steps.
(Step 1) Step of preparing a counterweight 5 (Figure 7(a)) with the stopper 60 removed (Figure 7(b))
(Step 2) The step of placing (mounting) the base 57 to which each shaft body 58 is attached onto the weight 55 (Figure 7(c))
(Step 3) Using the stopper 60 (reattaching it) to fix the base 57 integrally with the weight 55 (Figure 7(d))
(Step 4) The subweights 64 are placed on the base 57 while inserting each shaft 58 through each hole (Figure 7(e)).
(Step 5) The step of attaching the fixing device 59 to each shaft 58 protruding from the subweight 64 (Figure 7(f))

The second method has the effect of reducing the risk of the sub-weight 64 falling off during the construction of the counterweight 5.

Step 1 is for cases where, after the counterweight 5 has been constructed, it is found that the total weight is still insufficient, or where it becomes necessary to increase the total weight of the counterweight 5 due to the addition of some configuration to the cage 3 later. When a new counterweight 5 is installed, Step 1 is as follows. Steps 2 onwards are the same.
(Step 1) Step of loading the weight 55 (Figure 7(b))

As described above, according to the elevator 1 and counterweight 5 of this embodiment, the subweight 64 is loaded in the space above the weight 55 at the height of the left and right openings 50c, 50c. Therefore, wasted space is eliminated, and the load capacity (and consequently the total weight of the counterweight 5) can be increased.

Furthermore, according to the elevator 1 and counterweight 5 of this embodiment, the subweight 64 has a total length shorter than the distance between the pair of vertical frames 50, 50. Therefore, the subweight 64 can be placed on the base 57 without interfering with the stopper 60.

Furthermore, the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention.

In the above embodiment, two weights 55A and 55B of different thicknesses are used. However, the present invention is not limited thereto. As mentioned above, the sub-weight 64 also serves a weight adjustment purpose, so as shown in Figure 8, weight adjustment weight 55B may be omitted, and only weight 55A may be used.

Furthermore, in the above embodiment, a subweight 64A having the same thickness as weight 55A is used. However, the present invention is not limited thereto. As shown in Figure 9, a subweight 64 having a smaller thickness than weight 55A (for example, a subweight 64B having the same thickness as weight 55B) may also be used. Conversely, a subweight 64 having a larger thickness than weight 55A may also be used. In this case, there may be one subweight 64 instead of multiple subweights.

Furthermore, in the above embodiment, a subweight 64A of one thickness is used. However, the present invention is not limited thereto. As shown in Figure 10, a combination of two types of subweights, subweight 64A in Figures 5 and 8 and subweight 64B in Figure 9, may also be used.

Furthermore, in the above embodiment, the opening 50c is provided on each of the left and right vertical frames 50, 50. However, the present invention is not limited to this. The opening 50c may be provided on only one of the vertical frames 50. Even with this structure, the weight 55 and base 57 can be inserted between the pair of vertical frames 50, 50 while remaining horizontal by inserting them diagonally on the horizontal plane.

Furthermore, in the above embodiment, the base 57 is formed by adding internal threads to the weight 55A. However, the present invention is not limited to this. The base 57 may be manufactured separately from the weight 55. In this case, the base 57 may have a thickness smaller than the thickness of the weight 55A. Conversely, the base 57 may have a thickness larger than the thickness of the weight 55A. Also, the base 57 may be made of a different material.

Furthermore, in the above embodiment, the shaft 58 is detachably attached to the base 57. However, the present invention is not limited thereto. The shaft 58 may be integrated with the base 57 by welding or other means.

Furthermore, in the above embodiment, the engagement holes 57c of the base 57, and the insertion holes 64c of the shaft 58 and sub-weight 64 are each provided in two locations. However, the present invention is not limited to this. These may each be provided in three or more locations.

Furthermore, in the above embodiment, the insertion hole 64c of the subweight 64 is a round hole, that is, a hole that is closed around the entire circumference of the axis. However, the present invention is not limited to this. Even assuming that at least one insertion hole 64c is a round hole from the viewpoint of preventing the subweight 64 from falling out, the other insertion holes 64c may be notched holes, that is, slit holes in which a portion is open up to the outer edge of the subweight 64 (for example, a hole having an arc-shaped slit centered on a round hole or a linear slit encompassing it).

Furthermore, the above embodiment describes an elevator 1 of the so-called machine-room-less type, in which the hoisting machine 42 is located within the hoistway 2. However, the present invention is not limited to this. It goes without saying that the present invention can also be applied to elevators of the so-called machine-room type, in which the hoisting machine is located within a machine room at the top of the hoistway.

Furthermore, the above embodiment describes a so-called 2:1 roping type elevator 1 in which both ends 44a and 44b of the main rope 44 are fixed to the upper part of the hoistway 2, and the main rope 44 is wound around the car sheave 40 and the counterweight sheave 53, thereby connecting the main rope 44 to the car 3 and the counterweight 5. However, the present invention is not limited to this. It goes without saying that the present invention can also be applied to a so-called 1:1 roping type elevator in which one end of the main rope is fixed to the car and the other end of the main rope is fixed to the counterweight.

1...Elevator, 2...Hoistway, 20...Guide rail, 21...Guide rail, 3...Car, 30...Vertical frame, 31...Guide body, 4...Drive mechanism, 40...Car sheave, 41...First overhead sheave, 42...Hoisting machine, 43...Second overhead sheave, 44...Main rope, 44a...One end, 44b...Other end, 5...Counterweight, 50...Vertical frame, 50a...Flange, 50b...Web, 50c...Open section (notch), 51...Guide body, 52...Upper frame, 53...Counterweight sheave, 54...Lower frame, 55...Weight, 55A...Weight (standard type) 55B…Weight (thin type), 55a…Main body, 55b…End, 56…Sub-weight fixing body, 57…Base, 57a…Main body, 57b…End, 57c…Engagement hole (female thread), 58…Shaft (fully threaded bolt), 59…Fixing device (nut, washer, spring washer), 60…Stopper, 61…Bracket, 61a…Engagement hole (female thread), 62…Shaft (hex bolt), 63…Fixing device (nut), 64…Sub-weight, 64A…Sub-weight (standard type), 64B…Sub-weight (thin type), 64a…Main body, 64c…Through hole

Claims (5)

A pair of vertical frames are arranged opposite each other with a gap between them in the left-right direction, and the upper ends of the two plates are connected so as to sandwich each other in the center in the left-right direction, each having a pair of flanges along the vertical direction, and each having an opening on the upper side of the flange,
A weight having an overall length longer than the distance between a pair of vertical frames, positioned between a pair of vertical frames such that each end is inserted between a pair of flanges, and loaded to a height position that does not reach the opening,
A subweight having an overall length shorter than the distance between a pair of vertical frames, positioned on top of the weight such that each end does not overlap the flange, and stacked up to or above the height of the opening, the subweight having at least two holes that penetrate vertically,
It includes means for fixing subweights,
The means for securing the subweight is,
A base having an overall length longer than the distance between a pair of vertical frames, positioned on top of a weight with each end inserted between a pair of flanges, and on which a subweight is placed,
A pair of flanges are positioned opposite each other, and when viewed from the front, with the front-to-back direction being the front-to-back direction , the flanges are attached to each vertical frame at a height that overlaps with the opening, and a stopper that contacts the base from above to fix the base integrally with the weight,
A shaft protrudes upward from the base and is inserted into each hole of the subweight,
It comprises a fixing device attached to each shaft protruding from the subweight,
Stopper is,
A bracket that is attached to the vertical frame and has a screw hole that penetrates in the vertical direction,
It comprises a shaft with a head that is screwed into a screw hole so that the tip protrudes downward from the bracket,
An elevator counterweight that is attached to the vertical frame at a height where , when viewed from the front, the portion from the screw hole of the bracket to the head of the shaft with a head overlaps with the opening. The counterweight for an elevator according to claim 1, wherein the shaft of the means for fixing the subweight is a shaft without a head. A method for constructing a counterweight according to claim 1 or claim 2,
A process of loading weights, or a process of preparing a counterweight from which the weight fixing means has been removed,
The process of placing the base on top of the weight before attaching each shaft,
The process involves using a stopper to secure the base integrally with the weight,
A step of placing the sub-weight on the base so that each hole in the sub-weight aligns with the mounting point of the shaft on the base,
The process involves inserting each shaft into the respective holes of the subweight and attaching it to the base,
A method for constructing an elevator counterweight, comprising the step of attaching a fixing device to each shaft protruding from the subweight. A method for constructing a counterweight according to claim 1 or claim 2,
A process of loading weights, or a process of preparing a counterweight from which the weight fixing means has been removed,
The process involves placing the base with each shaft attached onto the weight,
The process involves using a stopper to secure the base integrally with the weight,
The process of placing the subweights on the base while inserting each shaft into each hole,
A method for constructing an elevator counterweight, comprising the step of attaching a fixing device to each shaft protruding from the subweight. As the elevator moves up and down within the hoistway,
An elevator comprising a counterweight connected to the car via a main rope, which moves up and down within the hoistway in conjunction with the raising and lowering of the car, the counterweight described in claim 1 or claim 2.