Elevator counterweight device and method of assembly thereof

Abstract

To provide an elevator counterweight device and a method for assembling the same that can reduce labor and working time. [Solution] The elevator counterweight device comprises 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 section, a lower frame section, and a pair of left and right vertical frame sections. The first vertical frames are supported inside the vertical frame sections. The second vertical frames are supported inside the vertical frame sections above the first vertical frames and are slidable up and down along the vertical frame sections. The first weight is supported at both ends by the first vertical frames and is placed on the lower frame section. The second weight is supported at both ends by the second vertical frames and is placed above the first weight. The third weight can be fixed within the second vertical frame between the first and second weights and can be lifted together with the second vertical frame and second weight using a lifting rope.

Description

Technical Field

[0001] Embodiments of the present invention relate to a counterweight device for an elevator and an assembly method thereof.

Background Art

[0002] An elevator counterweight device balances the weight between carriages by loading a plurality of weights of required weight on a weight frame. As the weights, weights made of castings or iron plates are generally used, but as relatively inexpensive weights, weights made of concrete may also be used.

[0003] When increasing the weight of a carriage at the site where an elevator is installed, it is necessary to increase the weight of the counterweight device for balance adjustment. However, there is a limit to the stacking height of the weights on the weight frame of the counterweight device, and it may not be possible to simply attach a newly prepared weight on top of the existing weights. In this case, it is necessary to remove the concrete weight, which has a lower specific gravity than castings or iron plates, and newly stack the iron plate weights.

[0004] However, when loading a plurality of types of weights on the weight frame, it is normal to load the weights together for each type of weight. Also, generally, in the weight frame, only one notch for stacking and removing the weights is provided on the upper side of the weight frame. Therefore, for example, when removing the lower concrete weight for balance adjustment, it was necessary to first remove all the upper iron plate weights and then remove the concrete weight. For this reason, the conventional counterweight device required a lot of labor and working time for weight adjustment.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The embodiment aims to provide an elevator counterweight device and a method for assembling the same that can reduce labor and working time. [Means for solving the problem]

[0007] The elevator counterweight device according to this embodiment comprises 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 frames are supported inside the vertical frame portions. The second vertical frames are supported inside the vertical frame portions above the first vertical frames and are slidable up and down along the vertical frame portions. The first weight is supported at both ends by the first vertical frames and is placed on the lower frame portion. The second weight is supported at both ends by the second vertical frames and is placed above the first weight. The third weight can be fixed within the second vertical frame between the first and second weights and can be lifted together with the second vertical frame and the second weight using a lifting rope. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a perspective view showing a counterweight device according to this embodiment. [Figure 2] Figure 2 is a perspective view showing the configuration of the counterweight device when adjusting the weight in the counterweight device according to this embodiment. [Figure 3] Figure 3 is a flowchart showing the assembly method of the counterweight device according to this embodiment. [Figure 4] Figure 4 is a perspective view showing the lower weight placement step in the assembly method of the counterweight device according to this embodiment. [Figure 5] Figure 5 is a flowchart showing the method for adjusting the weight of the counterweight device according to this embodiment. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the drawings. These embodiments are not intended to limit the present invention. In the drawings referenced in the embodiments, the same or similar reference numerals are used to denote identical parts or parts having similar functions, and repeated descriptions thereof will be omitted.

[0010] Generally, a hoisting elevator is constructed by suspending the elevator car and counterweight device 10 from a main rope 20 wound around a hoisting machine. Driven by the hoisting machine, the counterweight device 10 moves up and down along a pair of left and right guide rails 22L and 22R installed in the hoistway, balancing its weight with the elevator car. In the following description, the direction in which the counterweight device 1 rises along the guide rails 22L and 22R is defined as upward. The direction in which the counterweight device 1 descends along the guide rails 22L and 22R is defined as downward. The direction in which the pair of guide rails 22L and 22R are spaced apart is defined as the left and right direction.

[0011] As shown in Figure 1, the counterweight device 10 comprises an outer frame 1, a pair of left and right upper vertical frames 2L, 2R, a pair of left and right lower vertical frames 3L, 3R, an upper weight 4, a lower weight 5, a lifting weight 6, vertical frame fixing bolts 7, and a retaining bracket 8. The weight frame 9 is formed by the outer frame 1, the upper vertical frames 2L, 2R, and the lower vertical frames 3L, 3R. The upper vertical frames 2L, 2R are examples of second vertical frames. The lower vertical frames 3L, 3R are examples of first vertical frames. 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 bolts 7 are examples of fastening members and second fastening members.

[0012] The outer frame 1 has an upper frame section 11a, a lower frame section 11b, and a pair of left and right vertical frame sections 11L and 11R. A weight-side sheave 12 is provided on the upper frame section 11a. The main rope 20 is wound around the weight-side sheave 12. A receiving plate 13 is provided at the lower end of the lower frame section 11b, which contacts a buffer (not shown) installed on the bottom surface of the elevator shaft. Guide rollers 14 are provided at the upper and lower ends of the vertical frame sections 11L and 11R to guide the sliding of the counterweight device 1 along the guide rails 22L and 22R. The vertical frame sections 11L and 11R are provided with elongated holes 15 that extend in the vertical direction, from which vertical frame fixing bolts 7 can be attached and detached. Multiple elongated holes 15 are provided in the vertical frame sections 11L and 11R at intervals in the vertical direction.

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

[0014] The upper vertical frames 2L and 2R are supported inside the vertical frame sections 11L and 11R above the lower vertical frames 3L and 3R. More specifically, the upper vertical frames 2L and 2R are fastened and fixed to the vertical frame sections 11L and 11R by vertical frame fixing bolts 7, two of which are inserted into each of the elongated holes 15. Nuts (not shown) that are coupled to the vertical frame fixing bolts 7 may be used to fasten the vertical frame sections 11L and 11R to the upper vertical frames 2L and 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 in each of the elongated holes 15, one vertical frame fixing bolt 7 fastens the vertical frame sections 11L and 11R to the upper vertical frames 2L and 2R at the lower end of the elongated hole 15. Of the two vertical frame fixing bolts 7 in each of the elongated holes 15, the other vertical frame fixing bolt 7 fastens the vertical frame sections 11L, 11R and the upper vertical frames 2L, 2R at the upper end of the elongated hole 15. The upper vertical frames 2L, 2R are slidable up and down along the vertical frame sections 11L, 11R. The elongated hole 15 allows the upper vertical frames 2L, 2R to slide upward when the vertical frame fixing bolt 7 on the upper end of the elongated hole 15 is removed and the vertical frame fixing bolt 7 on the lower end of the elongated hole 15 is loosened.

[0015] The lower weight 5 is supported at both ends by the lower vertical frames 3L and 3R. The lower weight 5 is placed on the lower frame 11b. More specifically, the inside of the lower vertical frames 3L and 3R is provided with recesses 3a that run vertically and into which the left and right ends of the lower weight 5 can be inserted. The lower weight 5 is supported inside the lower vertical frames 3L and 3R by inserting both 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 11b by inserting both ends of the lower weight 5 into the recesses 3a from the upper end opening of the recesses 3a of the lower vertical frames 3L and 3R, and then lowering the lower weight 5 along the recesses 3a to the lower frame 11b. Conversely, the lower weight 5 can 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 example shown in Figure 1, multiple lower weights 5 are stacked on the lower frame 11b. The height of the upper end of the lower vertical frames 3L and 3R is lower than the height of the upper end of the topmost lower weight 5. For example, the height of the upper end of the lower vertical frames 3L and 3R is about the thickness of one lower weight 5 lower than the height of the upper end of the topmost lower weight 5.

[0016] The upper weight 4 is supported at both ends by the upper vertical frames 2L and 2R. The upper weight 4 is placed above the lower weight 5. More specifically, the upper weight 4 is placed on the lifting weight 6. More specifically, the inside of the upper vertical frames 2L and 2R is provided with recesses 2a that run vertically and into which the 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 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 ends of the upper weight 4 into the recesses 2a from the upper end opening of the recesses 2a of the upper vertical frames 2L and 2R, and then lowering the upper weight 4 along the recesses 2a to the lifting weight 6. Furthermore, the upper weight 4 can be removed from the upper vertical frames 2L and 2R by lifting it up to the upper end opening of the recess 2a, the opposite of the mounting process.

[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 Figure 2. More specifically, the lifting of the lifting weight 6 is permitted when the vertical frame fixing bolt 7 on the upper end side of the elongated hole 15 is removed and the vertical frame fixing bolt 7 on the lower end side of the elongated 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. The lifting weight 6 may also be provided with a hole through which the lifting rope 30 can be inserted instead of the notch 61. The lifting weight 6 is supported inside the upper vertical frames 2L, 2R by inserting both the left and right ends into the recesses 2a of the upper vertical frames 2L, 2R. Therefore, by inserting both ends of the lifting weight 6 into the recess 2a through the upper end opening of the recess 2a in the upper vertical frames 2L and 2R, and then lowering the lifting weight 6 along the recess 2a to the uppermost lower weight 5, the lifting weight 6 can be placed on the uppermost lower weight 5. Conversely, by lifting the lifting weight 6 to the upper end opening of the recess 2a, the lifting weight 6 can be removed from the upper vertical frames 2L and 2R.

[0018] The lower weight 5, the upper weight 4, and the lifting weight 6 differ in at least one of their 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 sheet metal. The lifting weight 6 differs from the lower weight 5 and the upper weight 4 in at least its shape, due to the provision of a notch 61.

[0019] As shown in Figure 2, the counterweight device 10 further includes weight fixing bolts 16 that are detachably arranged in the upper vertical frames 2L and 2R. The weight fixing bolts 16 are an example of a third fastening member. The weight fixing bolts 16 can fix the lifting weight 6 within the upper vertical frames 2L and 2R.

[0020] As shown in Fig. 1, the upper vertical frames 2L and 2R are provided with first fastening holes 21 into which the weight body fixing bolts 16 can be inserted. The weight body 6 is provided with second fastening holes (not shown) into which the weight body fixing bolts 16 can be inserted. The weight body fixing bolts 16 are inserted into the first fastening holes 21 and the second fastening holes in a state where the upper vertical frames 2L and 2R are lifted from the normal position where the lower ends of the upper vertical frames 2L and 2R contact the upper ends of the lower vertical frames 3L and 3R to the fastening position where the first fastening holes 21 face the second fastening holes, so that the weight body 6 can be fastened within the upper vertical frames 2L and 2R. For fastening the weight body 6 with the weight body fixing bolts 16, nuts (not shown) coupled to the weight body fixing bolts 16 may be further used. In this case, the nuts and the weight body fixing bolts 16 constitute a third fastening member. Fig. 1 shows the upper vertical frames 2L and 2R located at the normal position. Fig. 2 shows the upper vertical frames 2L and 2R lifted to the fastening position. 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 at the normal position.

[0021] In addition, a dynamic vibration absorber for suppressing the lateral vibration of the balance weight device 10 due to the vertical vibration may be installed on the upper weight body 4. In this case, the dynamic vibration absorber may also be configured to be lifted by a lifting rope or the like so that the weight bodies 4 and 5 below the dynamic vibration absorber can be removed.

[0022] Next, a method for assembling the balance weight device 10 having the above configuration will be described. First, as shown in Fig. 3, a pair of left and right lower vertical frames 3L and 3R are supported inside the vertical frame portions 11L and 11R (step S1). More specifically, the lower vertical frames 3L and 3R are fastened and fixed inside the vertical frame portions 11L and 11R by the vertical frame fixing bolts 7 inserted in pairs for each long hole 15.

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

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

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

[0026] After placing the lower weight 5, the left and right pair of upper vertical frames 2L, 2R are supported inside the upper vertical frame sections 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 sections 11L, 11R by vertical frame fixing bolts 7 inserted two at a time in each elongated hole 15.

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

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

[0029] After installing the lifting machine 40, remove the retaining bracket 8 (step S12).

[0030] After removing the retaining clip 8, loosen the vertical frame fixing bolt 7 on the lower end of the elongated hole 15, which fastens the upper vertical frames 2L, 2R to the outer frame 1 (step S13).

[0031] After loosening the vertical frame fixing bolt 7 on the lower end side of the elongated hole 15, remove the vertical frame fixing bolt 7 on the upper end side of the elongated hole 15 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 bolt 7 on the upper end side of the elongated hole 15, the upper vertical frames 2L and 2R are moved from their normal position to the upper fastening position. After moving the upper vertical frames 2L and 2R to the fastening position, the upper vertical frames 2L and 2R are fastened to the lifting weight 6 with the weight fixing bolt 16 (step S15).

[0033] After fastening the upper vertical frames 2L, 2R to the lifting weight 6, the lifting rope 30 is passed through the notch 61 of the lifting weight 6. After passing the lifting rope 30 through the notch 61, the lifting machine 40 lifts the lifting weight 6 via the lifting rope 30 (step S16). When the lifting weight 6 is lifted, the upper weight 4 is loaded on top of the lifting weight 6. The upper vertical frames 2L, 2R are also fixed to the lifting weight 6 by weight fixing bolts 16. Therefore, when the lifting weight 6 is lifted, the upper weight 4 and the upper vertical frames 2L, 2R are also lifted together. Since 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. Because friction can be minimized, lifting operations can be made smoother.

[0034] After lifting the lifting weight 6, the lower weight 5 to be removed is removed (step S17). Figure 2 shows the state in which the uppermost lower weight 5 is removed while the lifting weight 6 is lifted. When the lifting weight 6 is lifted, the upper weight 4 loaded on the lifting weight 6 is lifted together with the lifting weight 6. Also, because the lifting weight 6 is lifted, a vertical gap is formed between the lifting weight 6 and the uppermost lower weight 5, allowing for the removal of the lower weight 5. Therefore, the lower weight 5 can be easily removed without having to remove the upper weight 4 loaded on the lower weight 5 from the weight frame 9.

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

[0036] As described above, in this embodiment, the counterweight device 10 comprises an 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 are slidable up and down along the vertical frame portions 11L, 11R. The lower weight 5 is supported at both 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 ends by the 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 the lifting rope 30.

[0037] As a result, the lifting weight 6 and the upper weight 4, which are loaded on the lower weight 5, can be lifted using the lifting rope 30, so the lower weight 5 can be removed without having to remove the upper weight 4. Therefore, the labor and time required to adjust the weight of the counterweight device 10 can be reduced. In addition, 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 for smooth lifting of the lifting weight 6 and the upper weight 4, thereby 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 access the uppermost lower weight 5. As a sufficient gap can be provided, the uppermost lower weight 5 can be easily removed.

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

[0039] This allows the lifting rope 30 to be easily and appropriately installed via the notch 61, and the lifting weight 6 to be lifted stably, thereby further reducing labor and working time.

[0040] Furthermore, in this embodiment, the lower weight 5, the upper weight 4, and the lifting weight 6 differ from each other in at least one of their material and shape.

[0041] This allows for the arbitrary selection of materials and shapes suitable for weight adjustment for the lower weight 5, upper weight 4, and lifting weight 6, thereby enabling proper weight adjustment of the counterweight device 10.

[0042] Furthermore, in this embodiment, the vertical frame sections 11L and 11R are provided with elongated holes 15 that extend vertically, allowing the vertical frame fixing bolts 7 to be attached and detached. The elongated holes 15 allow the upper vertical frames 2L and 2R to slide upward and the lifting weight 6 to be lifted when the vertical frame fixing bolts 7 fastened to the lower end of the elongated holes 15 are loosened.

[0043] As a result, during normal elevator operation, the upper vertical frames 2L and 2R can be stably supported inside the vertical frame sections 11L and 11R by tightening the vertical frame fixing bolts 7 at the lower end 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, the lifting of the lifting weight body 6 can be allowed by tightening the vertical frame fixing bolts 7 at the lower end of the elongated holes 15, allowing the lower weight body 5 to be easily removed.

[0044] Furthermore, in this embodiment, when the second vertical frame fixing bolt 7 fastened to the upper end of the elongated hole 15 is removed from the elongated hole 15, the upper vertical frames 2L and 2R are allowed to slide upward and the lifting weight 6 is allowed to be lifted.

[0045] As a result, during normal elevator operation, the upper vertical frames 2L and 2R can be more stably supported inside the vertical frame sections 11L and 11R by tightening the vertical frame fixing bolts 7 at the upper end of the elongated holes 15, allowing 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 lifting weight of the lifting weight body 6 can be allowed by removing the vertical frame fixing bolts 7 at the upper end of the elongated holes 15, so the lower weight body 5 can be easily removed.

[0046] Furthermore, in this embodiment, the height of the upper end of the lower vertical frames 3L and 3R is lower than the height of the upper end of the topmost lower weight 5.

[0047] This allows the upper end of the topmost lower weight 5 to be exposed above the upper ends of the lower vertical frames 3L and 3R while the lifting weight 6 is lifted, making it easy to remove the topmost lower weight 5.

[0048] Furthermore, in this embodiment, the counterweight device 10 is detachably arranged in the upper vertical frames 2L and 2R, and is further provided with weight fixing bolts 16 that can fix the lifting weight 6 within the upper vertical frames 2L and 2R.

[0049] As a result, the lifting weight 6 can be fixed within the upper vertical frames 2L and 2R by the weight fixing bolt 16, allowing the lifting weight 6 and the upper weight 4 to be lifted together with the upper vertical frames 2L and 2R with a simple configuration.

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

[0051] This allows the upper vertical frames 2L and 2R to be moved to the fastening position and the lifting weight 6 to be fastened within the upper vertical frames 2L and 2R, thereby enabling the upper vertical frames 2L and 2R to be lifted together with the lifting weight 6 with a simple configuration. Furthermore, the upper vertical frames 2L and 2R can support the uppermost lower weight 5 in its normal position. This prevents the uppermost lower weight 5 from falling off, allowing the counterweight device 10 to be raised and lowered appropriately.

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

[0053] As a result, by lifting the lower weight 5 to the upper end opening of the recess 3a of the lower vertical frames 3L, 3R, the lower weight 5 can be placed on the lower frame 11b. This reduces the labor and time required to adjust the weight of the counterweight device 10, and further reduces the labor and time required to assemble (i.e., install) the counterweight device 10.

[0054] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims and their equivalents. [Explanation of Symbols]

[0055] 1 Outer frame, 10 Counterweight device, 11a Upper frame section, 11b Lower frame section, 11L, 11R Vertical frame sections, 15 Slotted 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 section, a lower frame section, and a pair of left and right vertical frame sections, A pair of left and right first vertical frames supported inside the aforementioned vertical frame portion, A pair of left and right second vertical frames are supported on the inside of the vertical frame portion above the first vertical frame and are slidable up and down along the vertical frame portion, The left and right ends are supported by the first vertical frame, and at least one first weight is placed on the lower frame, Supported at both ends by the second vertical frame, at least one second weight is placed above the first weight, A third weight is 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 equipped with [a specific feature].

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

3. The counterweight device according to claim 1, wherein the first weight, the second weight, and the third weight differ from each other in at least one of their material and shape.

4. The system further includes fastening members for fastening the aforementioned vertical frame portion and the second vertical frame, The vertical frame portion is provided with an elongated hole extending in the vertical direction, which allows the fastening member to 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. The system further includes a second fastening member for fastening the aforementioned 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. 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 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 cone 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 and second fastening holes and can fasten the third weight within the second vertical frame when the second vertical frame is raised from the normal position where the lower end of the second vertical frame is in contact with the upper end of the first vertical frame to the 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 having an upper frame portion, a lower frame portion, and a pair of left and right vertical frame portions, with a pair of left and right first vertical frames supported inside the vertical frame portions of the outer frame, At least one first weight is placed on the lower frame so that both the left and right ends 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 vertically along the vertical frame portion. A third weight, which can be lifted together with the second vertical frame using a lifting rope, is placed on the first weight so that both ends are supported by the second vertical frame. At least one second weight is placed on the third weight so that both the left and right ends are supported by the second vertical frame. A method for assembling an elevator counterweight device equipped with [a specific component].

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