Elevator balancing device and method of assembling same

Abstract

To provide an elevator counterweight device and an assembly method thereof that can reduce work effort and work time. [Solution] The elevator counterweight device includes an outer frame, a pair of left and right first vertical frames, a pair of left and right second vertical frames, at least one first weight, at least one second weight, and a third weight. The outer frame has an upper frame portion, a lower frame portion, and a pair of left and right vertical frame portions. The first vertical frame is supported on the inside of the vertical frame portions. The second vertical frame is supported on the inside of the vertical frame portions above the first vertical frame and is slidable up and down along the vertical frame portions. The first weight is supported at both left and right ends by the first vertical frame and is placed on the lower frame portion. The second weight is supported at both left and right ends by the second vertical frame and is placed above the first weight. The third weight can be fixed within the second vertical frame between the first weight and the second weight, and can be lifted together with the second vertical frame and the second weight using a lifting rope.

Description

[Technical Field]

[0001] FIELD OF THE INVENTION The present invention relates to an elevator counterweight device and a method for assembling the same. [Background technology]

[0002] An elevator counterweight device balances the weight of the elevator car by loading multiple weights of the required weight onto a counterweight frame. The weights are generally made of cast iron or steel plate, but concrete is sometimes used as a relatively inexpensive counterweight.

[0003] When the weight of the elevator car is increased on-site, the weight of the counterweight device must also be increased to adjust the balance. However, there is a limit to the height at which the counterweight frame of the counterweight device can be loaded, and it may not be possible to simply install a new counterweight on top of the existing one. In this case, it is necessary to remove the cast iron or concrete counterweight, which has a lower specific gravity than steel plate, and load a new steel plate counterweight.

[0004] However, when multiple types of weights are loaded onto a weight frame, the weights are typically loaded together by type. Furthermore, weight frames typically have only one notch on the upper side for stacking or removing weights. Therefore, for example, when removing a lower concrete weight for balance adjustment, all of the upper steel weights must first be removed before removing the concrete weight. For this reason, conventional balancing weight devices require a lot of labor and time to adjust the weight. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 10-250959 Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the embodiments is to provide an elevator counterweight device and an assembly method thereof that can reduce work effort and work time. [Means for solving the problem]

[0007] An elevator counterweight device according to an embodiment includes an outer frame, a pair of left and right first vertical frames, a pair of left and right second vertical frames, at least one first weight, at least one second weight, and a third weight. The outer frame has an upper frame portion, a lower frame portion, and a pair of left and right vertical frame portions. The first vertical frame is supported on the inside of the vertical frame portions. The second vertical frame is supported on the inside of the vertical frame portions above the first vertical frame and is slidable up and down along the vertical frame portions. The first weight is supported at both left and right ends by the first vertical frame and placed on the lower frame portion. The second weight is supported at both left and right ends by the second vertical frame and placed above the first weight. The third weight can be fixed within the second vertical frame between the first weight and the second weight, and can be lifted together with the second vertical frame and the second weight using a lifting rope. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a counterweight device according to this embodiment. [Figure 2] FIG. 2 is a perspective view showing the configuration of the counterweight device according to this embodiment when adjusting the weight. [Figure 3] FIG. 3 is a flowchart showing a method for assembling the counterweight device according to this embodiment. [Figure 4] FIG. 4 is a perspective view showing the step of placing the lower weight body in the method of assembling the counterweight device according to this embodiment. [Figure 5] FIG. 5 is a flowchart showing a method for adjusting the weight of the counterweight device according to this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments. In addition, in the drawings referred to in the embodiments, identical parts or parts having similar functions are designated by the same or similar reference numerals, and repeated description thereof will be omitted.

[0010] In general, a hoist elevator is configured such that a car and a counterweight device 10 are suspended by a main rope 20 wound around a hoist. Driven by the hoist, the counterweight device 10 moves up and down along a pair of left and right guide rails 22L, 22R installed in the hoistway while maintaining a weight balance with the car. In the following description, the direction in which the counterweight device 1 rises along the guide rails 22L, 22R is defined as "upward." Furthermore, the direction in which the counterweight device 1 descends along the guide rails 22L, 22R is defined as "downward." Furthermore, the direction in which the pair of guide rails 22L, 22R are spaced apart is defined as the left-right direction.

[0011] As shown in FIG. 1, the counterweight device 10 includes an outer frame 1, a pair of upper vertical frames 2L, 2R (left and right), a pair of lower vertical frames 3L, 3R, an upper weight 4, a lower weight 5, a lifting weight 6, a vertical frame fixing bolt 7, and a clamp 8. The outer frame 1, the upper vertical frames 2L, 2R, and the lower vertical frames 3L, 3R form a weight frame 9. The upper vertical frames 2L, 2R are an example of a second vertical frame. The lower vertical frames 3L, 3R are an example of a first vertical frame. The lower weight 5 is an example of a first weight. The upper weight 4 is an example of a second weight. The lifting weight 6 is an example of a third weight. The vertical frame fixing bolt 7 is an example of a fastening member and a second fastening member.

[0012] The outer frame 1 has an upper frame portion 11a, a lower frame portion 11b, and a pair of left and right vertical frame portions 11L, 11R. A counterweight side sheave 12 is provided in the upper frame portion 11a. A main rope 20 is wound around the counterweight side sheave 12. A support plate 13 is provided at the lower end of the lower frame portion 11b, which abuts against a buffer (not shown) installed on the bottom surface of the hoistway. Guide rollers 14 are provided at the upper and lower ends of the vertical frame portions 11L, 11R to guide the sliding of the counterweight device 1 along the guide rails 22L, 22R. The vertical frame portions 11L, 11R are provided with elongated holes 15 extending in the vertical direction, into which the vertical frame fixing bolts 7 can be attached and detached. A plurality of elongated holes 15 are provided in the vertical frame portions 11L, 11R at intervals in the vertical direction.

[0013] The lower vertical frames 3L, 3R are supported inside the vertical frame portions 11L, 11R. More specifically, the lower vertical frames 3L, 3R are fastened to the vertical frame portions 11L, 11R by vertical frame fixing bolts 7, two of which are inserted into each elongated hole 15. Nuts (not shown) coupled to the vertical frame fixing bolts 7 may also be used to fasten the vertical frame portions 11L, 11R to the lower vertical frames 3L, 3R using the vertical frame fixing bolts 7. Of the two vertical frame fixing bolts 7 for each elongated hole 15, one vertical frame fixing bolt 7 fastens the vertical frame portions 11L, 11R to the lower vertical frames 3L, 3R at the lower end of the elongated hole 15. Of the two vertical frame fixing bolts 7 for each elongated hole 15, the other vertical frame fixing bolt 7 fastens the vertical frame portions 11L, 11R to the lower vertical frames 3L, 3R at the upper end of the elongated hole 15.

[0014] The upper vertical frames 2L, 2R are supported inside the vertical frame portions 11L, 11R above the lower vertical frames 3L, 3R. More specifically, the upper vertical frames 2L, 2R are fastened to the vertical frame portions 11L, 11R by vertical frame fixing bolts 7, two of which are inserted into each elongated hole 15. Nuts (not shown) coupled to the vertical frame fixing bolts 7 may also be used to fasten the vertical frame portions 11L, 11R to the upper vertical frames 2L, 2R using the vertical frame fixing bolts 7. In this case, the nuts, together with the vertical frame fixing bolts 7, constitute a fastening member or a second fastening member. Of the two vertical frame fixing bolts 7 for each elongated hole 15, one vertical frame fixing bolt 7 fastens the vertical frame portions 11L, 11R to the upper vertical frames 2L, 2R at the lower end of the elongated hole 15. Of the two vertical frame fixing bolts 7 for each long hole 15, the other vertical frame fixing bolt 7 fastens the vertical frame portions 11L, 11R to the upper vertical frames 2L, 2R at the upper end of the long hole 15. The upper vertical frames 2L, 2R can slide up and down along the vertical frame portions 11L, 11R. The long holes 15 allow the upper vertical frames 2L, 2R to slide upward when the vertical frame fixing bolt 7 on the upper end side of the long hole 15 is removed and the vertical frame fixing bolt 7 on the lower end side of the long hole 15 is loosened.

[0015] The lower weight 5 is supported at both left and right ends by the lower vertical frames 3L and 3R. The lower weight 5 is placed on the lower frame portion 11b. More specifically, recesses 3a are provided inside the lower vertical frames 3L and 3R, into which both left and right ends of the lower weight 5 can be inserted along the vertical direction. The lower weight 5 is supported inside the lower vertical frames 3L and 3R by inserting both left and right ends into the recesses 3a of the lower vertical frames 3L and 3R. Therefore, the lower weight 5 can be placed on the lower frame portion 11b by inserting both left and right ends of the lower weight 5 into the recesses 3a of the lower vertical frames 3L and 3R through the upper end openings of the recesses 3a, and then lowering the lower weight 5 along the recesses 3a onto the lower frame portion 11b. The lower weight 5 can also be removed from the lower vertical frames 3L and 3R by lifting the lower weight 5 up to the upper end opening of the recesses 3a, in the opposite manner to when it was placed. 1, multiple lower weights 5 are stacked on the lower frame portion 11b. The height of the upper ends of the lower vertical frames 3L, 3R is lower than the height of the upper end of the uppermost lower weight 5. For example, the height of the upper ends of the lower vertical frames 3L, 3R is lower than the height of the uppermost lower weight 5 by approximately the thickness of one lower weight 5.

[0016] The upper weight 4 is supported at both left and right ends by the upper vertical frames 2L and 2R. The upper weight 4 is placed above the lower weight 5. Specifically, the upper weight 4 is placed on the lifting weight 6. More specifically, recesses 2a are provided inside the upper vertical frames 2L and 2R along the vertical direction, into which both left and right ends of the upper weight 4 can be inserted. The upper weight 4 is supported inside the upper vertical frames 2L and 2R by inserting both left and right ends into the recesses 2a of the upper vertical frames 2L and 2R. Therefore, the upper weight 4 can be placed on the lifting weight 6 by inserting both left and right ends of the upper weight 4 into the recesses 2a through the upper end openings of the recesses 2a of the upper vertical frames 2L and 2R and then lowering the upper weight 4 along the recesses 2a onto the lifting weight 6. Moreover, by lifting the upper weight body 4 up to the upper end opening of the recess 2a in the opposite direction to when it is placed, the upper weight body 4 can be removed from the upper vertical frames 2L, 2R.

[0017] The lifting weight 6 can be fixed within the upper vertical frames 2L, 2R between the lower weight 5 and the upper weight 4. When fixed within the upper vertical frames 2L, 2R, the lifting weight 6 can be lifted together with the upper vertical frames 2L, 2R and the upper weight 4 using the lifting rope 30 shown in FIG. 2. More specifically, the lifting weight 6 can be lifted when the vertical frame fixing bolt 7 at the upper end of the long hole 15 is removed and the vertical frame fixing bolt 7 at the lower end of the long hole 15 is loosened. The lower end of the lifting weight 6 is provided with a notch 61 through which the lifting rope 30 can be inserted. Instead of the notch 61, the lifting weight 6 may be provided with a hole through which the lifting rope 30 can be inserted. The lifting weight 6 is supported inside the upper vertical frames 2L, 2R by inserting both left and right ends into the recesses 2a of the upper vertical frames 2L, 2R. Therefore, the lifting weight body 6 can be placed on the uppermost lower weight body 5 by inserting both left and right ends of the lifting weight body 6 into the recesses 2a of the upper vertical frames 2L, 2R through the upper end openings of the recesses 2a and then lowering the lifting weight body 6 along the recesses 2a onto the uppermost lower weight body 5. Conversely to the case of placement, the lifting weight body 6 can be removed from the upper vertical frames 2L, 2R by lifting the lifting weight body 6 up to the upper end opening of the recesses 2a.

[0018] The lower weight 5, the upper weight 4, and the lifting weight 6 are different in at least one of material and shape. The lower weight 5 may be a weight made of concrete. The upper weight 4 may be a weight made of cast iron or iron plate. The lifting weight 6 is provided with a notch 61, so that at least the shape of the lifting weight 6 is different from the lower weight 5 and the upper weight 4.

[0019] 2, the counterweight device 10 further includes a weight fixing bolt 16 detachably arranged on the upper vertical frames 2L, 2R. The weight fixing bolt 16 is an example of a third fastening member. The weight fixing bolt 16 can fix the lifting weight 6 inside the upper vertical frames 2L, 2R.

[0020] As shown in FIG. 1 , the upper vertical frames 2L and 2R are provided with first fastening holes 21 through which the weight fixing bolts 16 can be inserted. The lifting weight 6 is provided with second fastening holes (not shown) through which the weight fixing bolts 16 can be inserted. When the upper vertical frames 2L and 2R are raised from their normal position, in which the lower ends of the upper vertical frames 2L and 2R contact the upper ends of the lower vertical frames 3L and 3R, to a fastening position in which the first fastening holes 21 face the second fastening holes, the weight fixing bolts 16 can be inserted into the first and second fastening holes to fasten the lifting weight 6 within the upper vertical frames 2L and 2R. A nut (not shown) coupled to the weight fixing bolts 16 may also be used to fasten the lifting weight 6 with the weight fixing bolts 16. In this case, the nut, together with the weight fixing bolts 16, constitutes a third fastening member. FIG. 1 shows the upper vertical frames 2L and 2R in their normal positions. FIG. 2 shows the upper vertical frames 2L and 2R raised to their fastening positions. As shown in FIG. 1, the upper vertical frames 2L and 2R support both left and right ends of the uppermost lower weight body 5 in the normal position.

[0021] A dynamic vibration absorber that suppresses lateral vibration of the counterweight device 10 due to vertical vibration may be installed on the upper weight 4. In this case, the dynamic vibration absorber may also be configured to be liftable by a lifting rope or the like so that the weights 4, 5 below the dynamic vibration absorber can be removed.

[0022] Next, a method for assembling the counterweight device 10 having the above configuration will be described. First, as shown in Fig. 3, a pair of lower vertical frames 3L, 3R are supported inside the vertical frame portions 11L, 11R (step S1). More specifically, the lower vertical frames 3L, 3R are fastened and fixed inside the vertical frame portions 11L, 11R using vertical frame fixing bolts 7, two of which are inserted into each of the elongated holes 15.

[0023] After the lower vertical frames 3L, 3R are supported, the lower weight 5 is placed on the lower frame portion 11b so that both left and right ends are supported by the lower vertical frames 3L, 3R (step S2, FIG. 4). That is, the lower weight 5 is placed on the lower frame portion 11b with both left and right ends of the lower weight 5 inserted into the recesses 3a on the inside of each of the lower vertical frames 3L, 3R. Note that FIG. 4 shows the state in which the uppermost lower weight 5 is being placed.

[0024] Here, if the upper vertical frames 2L, 2R are fixed inside the vertical frame portions 11L, 11R before placing the lower weight 5 on the lower frame portion 11b, the lower weight 5 cannot be placed on the lower frame portion 11b unless the lower weight 5 is lifted up to the upper opening of the recess 2a of the upper vertical frames 2L, 2R. This is because, in the normal position, the lower ends of the upper vertical frames 2L, 2R abut the upper ends of the lower vertical frames 3L, 3R, and therefore the upper opening of the recess 3a of the lower vertical frames 3L, 3R is blocked by the lower ends of the upper vertical frames 2L, 2R.

[0025] In contrast, in this embodiment, when placing the lower weight 5 on the lower frame portion 11b, the upper vertical frames 2L, 2R are not fixed to the inside of the vertical frame portions 11L, 11R. Therefore, by lifting the lower weight 5 up to the upper opening of the recess 3a of the lower vertical frames 3L, 3R, the lower weight 5 can be placed on the lower frame portion 11b.

[0026] After placing the lower weight body 5, the pair of upper vertical frames 2L, 2R are supported inside the vertical frame portions 11L, 11R above the lower vertical frames 3L, 3R (step S3). More specifically, the upper vertical frames 2L, 2R are fastened and fixed inside the vertical frame portions 11L, 11R using the vertical frame fixing bolts 7, two of which are inserted into each of the long holes 15.

[0027] After the upper vertical frames 2L, 2R are supported, the lifting weight 6 and the upper weight 4 are sequentially placed on the lower weight 5 so that both left and right ends are supported by the upper vertical frames 2L, 2R (step S4). That is, the lifting weight 6 and the upper weight 4 are sequentially placed on the lower weight 5 with both left and right ends of the lifting weight 6 and the upper weight 4 inserted into the recesses 2a on the inside of each of the upper vertical frames 2L, 2R.

[0028] Next, a description will be given of a method for adjusting the weight of the counterweight device 10. First, as shown in Fig. 5, a lifting machine 40 is attached to a suspension point installed on a tower above the counterweight device 10 (step S11).

[0029] After the lifting machine 40 is attached, the clamp 8 is removed (step S12).

[0030] After removing the clamping bracket 8, among the vertical frame fixing bolts 7 that fasten the upper vertical frames 2L, 2R to the outer frame 1, the vertical frame fixing bolt 7 on the lower end side of the elongated hole 15 is loosened (step S13).

[0031] After loosening the vertical frame fixing bolt 7 at the lower end of the long hole 15, the vertical frame fixing bolt 7 at the upper end of the long hole 15 is removed from the vertical frame fixing bolts 7 that fasten the upper vertical frames 2L, 2R to the outer frame 1 (step S14).

[0032] After removing the vertical frame fixing bolts 7 on the upper end sides of the elongated holes 15, the upper vertical frames 2L, 2R are moved from their normal positions to the upper fastening positions. After the upper vertical frames 2L, 2R have been moved to the fastening positions, the upper vertical frames 2L, 2R and the lifting weight body 6 are fastened together with the weight fixing bolts 16 (step S15).

[0033] After fastening the upper vertical frames 2L, 2R and the lifting weight 6, the lifting rope 30 is passed through the notch 61 of the lifting weight 6. After the lifting rope 30 is passed through the notch 61, the lifting weight 6 is lifted by the lifting machine 40 via the lifting rope 30 (step S16). When lifting the lifting weight 6, the upper weight 4 is loaded on the lifting weight 6. In addition, the upper vertical frames 2L, 2R are fixed to the lifting weight 6 with weight fixing bolts 16. Therefore, when lifting the lifting weight 6, the upper weight 4 and the upper vertical frames 2L, 2R are also lifted together. Because the upper weight 4 and the lifting weight 6 are lifted together with the upper vertical frames 2L, 2R, friction between the upper vertical frames 2L, 2R and the upper weight 4 and friction between the upper vertical frames 2L, 2R and the lifting weight 6 can be minimized. Friction can be kept to a minimum, making lifting operations smoother.

[0034] After lifting the lifting weight body 6, the lower weight body 5 to be removed is removed (step S17). FIG. 2 shows the state in which the uppermost lower weight body 5 is being removed when the lifting weight body 6 is in a lifted state. When the lifting weight body 6 is in a lifted state, the upper weight body 4 loaded on the lifting weight body 6 is lifted together with the lifting weight body 6. Furthermore, because the lifting weight body 6 is lifted, a vertical gap is formed between the lifting weight body 6 and the uppermost lower weight body 5, which allows the lower weight body 5 to be removed. Therefore, the lower weight body 5 can be easily removed without the need to remove the upper weight body 4 loaded on the lower weight body 5 from the weight frame 9.

[0035] After the lower weight body 5 is removed, the counterweight device 10 is returned from the lifted state to the normal state (step S18). After the counterweight device 10 is returned from the lifted state to the normal state, the upper weight body 4 can be added or removed as needed.

[0036] As described above, in this embodiment, the counterweight device 10 includes the outer frame 1, a pair of left and right lower vertical frames 3L, 3R, a pair of left and right upper vertical frames 2L, 2R, at least one lower weight 5, at least one upper weight 4, and a lifting weight 6. The outer frame 1 has an upper frame portion 11a, a lower frame portion 11b, and a pair of left and right vertical frame portions 11L, 11R. The lower vertical frames 3L, 3R are supported inside the vertical frame portions 11L, 11R. The upper vertical frames 2L, 2R are supported inside the vertical frame portions 11L, 11R above the upper vertical frames 2L, 2R and can slide up and down along the vertical frame portions 11L, 11R. The lower weight 5 is supported at both left and right ends by the lower vertical frames 3L, 3R and is placed on the lower frame portion 11b. The upper weight 4 is supported at both its left and right ends by upper vertical frames 2L and 2R, and is placed above the lower weight 5. The lifting weight 6 can be fixed within the upper vertical frames 2L and 2R between the lower weight 5 and the upper weight 4, and can be lifted together with the upper vertical frames 2L and 2R and the upper weight 4 using a lifting rope 30.

[0037] As a result, the lifting weight 6 and the upper weight 4 loaded on the lower weight 5 can be lifted using the lifting rope 30, allowing the lower weight 5 to be removed without the need to remove the upper weight 4. This reduces the labor and time required to adjust the weight of the counterweight device 10. Furthermore, since the lifting weight 6 and the upper weight 4 can be lifted together with the upper vertical frames 2L and 2R, friction between the lifting weight 6 and the upper weight 4 and the upper vertical frames 2L and 2R can be minimized. This allows the lifting of the lifting weight 6 and the upper weight 4 to be performed smoothly, improving work efficiency. Furthermore, since the upper vertical frames 2L and 2R can be lifted, a sufficient gap can be provided between the lower ends of the upper vertical frames 2L and 2R and the upper ends of the lower vertical frames 3L and 3R to allow access to the uppermost lower weight 5. Providing a sufficient gap allows the uppermost lower weight 5 to be easily removed.

[0038] In this embodiment, the lifting weight body 6 is provided with a notch 61 through which the lifting rope 30 can be inserted. Instead of the notch 61, the lifting weight body 6 may be provided with a hole through which the lifting rope 30 can be inserted.

[0039] This allows the lifting rope 30 to be easily and appropriately installed through the notch 61 and the lifting weight body 6 to be lifted stably, thereby further reducing the work effort and work time.

[0040] In this embodiment, the lower weight body 5, the upper weight body 4, and the lifting weight body 6 are different from one another in at least one of material and shape.

[0041] This allows the materials and shapes of the lower weight body 5, the upper weight body 4, and the lifting weight body 6 to be selected arbitrarily to be suitable for adjusting the weight, thereby allowing the weight of the balancing weight device 10 to be adjusted appropriately.

[0042] In this embodiment, the vertical frame portions 11L, 11R are provided with elongated holes 15 extending in the vertical direction, into which the vertical frame fixing bolts 7 can be attached and detached. The elongated holes 15 allow the upper vertical frames 2L, 2R to slide upward and the lifting weight body 6 to be lifted when the vertical frame fixing bolts 7 fastened to the lower ends of the elongated holes 15 are loosened.

[0043] As a result, during normal elevator operation, the upper vertical frames 2L, 2R can be stably supported inside the vertical frame portions 11L, 11R by tightening the vertical frame fixing bolts 7 at the lower ends of the elongated holes 15, allowing the counterweight device 10 to be raised and lowered appropriately. On the other hand, when adjusting the weight of the counterweight device 10, tightening the vertical frame fixing bolts 7 at the lower ends of the elongated holes 15 allows the lifting of the lifting weight body 6, allowing the lower weight body 5 to be easily removed.

[0044] In addition, in this embodiment, when the second vertical frame fixing bolt 7 fastened to the upper end of the long hole 15 is removed from the long hole 15, it allows the upper vertical frames 2L, 2R to slide upward and the lifting weight body 6 to be lifted.

[0045] As a result, during normal elevator operation, the upper vertical frames 2L, 2R can be more stably supported inside the vertical frame portions 11L, 11R by tightening the vertical frame fixing bolts 7 at the upper ends of the elongated holes 15, thereby enabling the counterweight device 10 to be raised and lowered more appropriately. On the other hand, when adjusting the weight of the counterweight device 10, the vertical frame fixing bolts 7 at the upper ends of the elongated holes 15 can be removed to allow the lifting weight body 6 to be lifted, so the lower weight body 5 can be easily removed.

[0046] In this embodiment, the height of the upper ends of the lower vertical frames 3L and 3R is lower than the height of the upper end of the uppermost lower weight body 5.

[0047] As a result, with the lifting weight body 6 lifted, the upper end of the uppermost lower weight body 5 can be exposed above the upper ends of the lower vertical frames 3L, 3R, so that the uppermost lower weight body 5 can be easily removed.

[0048] In this embodiment, the counterweight device 10 is detachably disposed on the upper vertical frames 2L, 2R, and further includes weight fixing bolts 16 capable of fixing the lifting weight 6 within the upper vertical frames 2L, 2R.

[0049] This allows the lifting weight 6 to be fixed within the upper vertical frames 2L, 2R using the weight fixing bolts 16, so that the lifting weight 6 and upper weight 4 can be lifted together with the upper vertical frames 2L, 2R with a simple configuration.

[0050] In this embodiment, the upper vertical frames 2L, 2R are provided with first fastening holes 21 into which the weight fixing bolts 16 can be inserted. The lifting weight 6 is provided with second fastening holes into which the weight fixing bolts 16 can be inserted. The weight fixing bolts 16 can be inserted into the first fastening holes 21 and the second fastening holes to fasten the lifting weight 6 within the upper vertical frames 2L, 2R when the upper vertical frames 2L, 2R are raised from a normal position in which the lower ends of the upper vertical frames 2L, 2R contact the upper ends of the lower vertical frames 3L, 3R to a fastening position in which the first fastening holes 21 face the second fastening holes. The upper vertical frames 2L, 2R support both left and right ends of the uppermost lower weight 5 in the normal position.

[0051] As a result, by moving the upper vertical frames 2L, 2R to the fastening position and fastening the lifting weight body 6 into the upper vertical frames 2L, 2R, it is possible to lift the upper vertical frames 2L, 2R together with the lifting weight body 6 with a simple configuration. Furthermore, the upper vertical frames 2L, 2R can support the uppermost lower weight body 5 in the normal position. This prevents the uppermost lower weight body 5 from falling off, allowing the counterweight device 10 to be raised and lowered appropriately.

[0052] In this embodiment, after the lower weight 5 is placed on the lower frame portion 11b, the upper vertical frames 2L, 2R are supported inside the vertical frame portions 11L, 11R above the lower vertical frames 3L, 3R.

[0053] This means that by lifting the lower weight body 5 up to the upper end opening of the recess 3a of the lower vertical frames 3L, 3R, the lower weight body 5 can be placed on the lower frame portion 11b, which not only reduces the labor and time required to adjust the weight of the balancing weight device 10, but also reduces the labor and time required to assemble (i.e., install) the balancing weight device 10.

[0054] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, as well as within the scope of the invention described in the claims and their equivalents. [Explanation of symbols]

[0055] 1 outer frame, 10 balancing weight device, 11a upper frame portion, 11b lower frame portion, 11L, 11R vertical frame portion, 15 elongated hole, 16 weight fixing bolt, 2L, 2R upper vertical frame, 21 first fastening hole, 3L, 3R lower vertical frame, 30 lifting rope, 4 upper weight, 5 lower weight, 6 lifting weight, 61 notch, 7 vertical frame fixing bolt

Claims

1. an outer frame having an upper frame portion, a lower frame portion, and a pair of left and right vertical frame portions; A pair of left and right first vertical frames supported on the inside of the vertical frame portion; A pair of left and right second vertical frames supported on the inside of the vertical frame portion above the first vertical frame and slidable up and down along the vertical frame portion; At least one first weight supported at both left and right ends by the first vertical frame and placed on the lower frame portion; At least one second weight placed above the first weight and supported at both left and right ends by the second vertical frame; a third weight that can be fixed within the second vertical frame between the first weight and the second weight and can be lifted together with the second vertical frame and the second weight using a lifting rope; An elevator counterweight device comprising:

2. 2. The counterweight device according to claim 1, wherein the third weight is provided with a hole or a notch through which the lifting rope can be passed.

3. The counterweight device according to claim 1 , wherein the first weight, the second weight, and the third weight are different from one another in at least one of material and shape.

4. Further provided is a fastening member that fastens the vertical frame portion and the second vertical frame, The vertical frame portion is provided with a long hole extending in the vertical direction, to which the fastening member can be attached and detached, The counterweight device according to claim 1 , wherein the elongated hole allows the second vertical frame to slide upward and the third weight to be lifted when the fastening member is loosened.

5. Further provided is a second fastening member that fastens the vertical frame portion and the second vertical frame, The fastening member fastens the vertical frame portion and the second vertical frame at the lower end of the elongated hole, 5. The counterweight device according to claim 4, wherein the second fastening member fastens the vertical frame portion and the second vertical frame at the upper end of the elongated hole, and when removed from the elongated hole, allows the second vertical frame to slide upward and the third weight to be lifted.

6. The counterweight device according to claim 1 , wherein the height of the upper end of the first vertical frame is lower than the height of the upper end of the uppermost first weight.

7. The counterweight device according to claim 1 , further comprising a third fastening member detachably disposed on the second vertical frame and capable of fixing the third weight within the second vertical frame.

8. The second vertical frame is provided with a first fastening hole into which the third fastening member can be inserted, the third weight body is provided with a second fastening hole into which the third fastening member can be inserted, the third fastening member is inserted into the first fastening hole and the second fastening hole to fasten the third weight within the second vertical frame when the second vertical frame is raised from a normal position where the lower end of the second vertical frame contacts the upper end of the first vertical frame to a fastening position where the first fastening hole faces the second fastening hole, The counterweight device according to claim 7 , wherein the second vertical frame supports both left and right ends of the uppermost first weight in the normal position.

9. An outer frame has an upper frame portion, a lower frame portion, and a pair of left and right vertical frame portions, and a pair of left and right first vertical frame portions are supported inside the vertical frame portions, At least one first weight is placed on the lower frame portion so that both left and right ends thereof are supported by the first vertical frame; After the first weight is placed, a pair of left and right second vertical frames are supported inside the vertical frame portion above the first vertical frame so as to be slidable up and down along the vertical frame portion; a third weight that can be lifted together with the second vertical frame using a lifting rope is placed on the first weight so that both left and right ends are supported by the second vertical frame; placing at least one second weight on the third weight so that both left and right ends thereof are supported by the second vertical frame; A method for assembling an elevator counterweight device comprising:

Images