Elevator counterweight device

Abstract

The present invention provides an elevator counterweight device that allows for easy adjustment of the weight balance, even when a damper weight mechanism is installed. [Solution] The elevator counterweight device according to this embodiment includes a damper weight mechanism mounted on a main weight. The damper weight mechanism includes a suspension point used when lifting the damper weight mechanism. When the damper weight mechanism is in the first position, the lower part of the notch is covered by the damper vertical beam. When the damper weight mechanism is in the second position, the upper part of the notch above the main weight is exposed from the damper vertical beam.

Description

Technical Field

[0001] The embodiment relates to a counterweight device for an elevator.

Background Art

[0002] An elevator device is known in which a counterweight is connected to a car via a main rope, and the car is moved up and down by winding up the main rope. The counterweight is configured by stacking a plurality of weight bodies in the vertical direction in a weight frame.

[0003] A damper weight mechanism may be mounted above the weight body of the counterweight.

[0004] On the other hand, the damper weight mechanism may be arranged below the weight frame. In this case, in order to avoid contact with other devices such as a buffer installed on the bottom surface of the hoistway, the shape and weight of the damper weight mechanism are restricted. Therefore, there is a risk that a sufficient vibration absorption effect cannot be obtained. Mounting the damper weight mechanism above the weight body can eliminate the need to consider avoiding contact with other devices, and is advantageous in that a sufficient vibration absorption effect can be obtained in a small space, and can also contribute to space saving.

[0005] The damper weight mechanism mounted above the weight body is placed on the weight body after stacking the weight bodies in the weight frame of the counterweight. When adjusting the weight balance of the weight body after mounting the damper weight mechanism, the damper weight mechanism was disassembled and the weight balance of the weight body was adjusted. After adjustment, the damper weight mechanism was reassembled. This required a lot of working time for the weight balance adjustment work.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

[0007] The embodiment aims to provide an elevator counterweight device that allows for easy adjustment of the weight balance, even when a damper weight mechanism is installed. [Means for solving the problem]

[0008] The elevator counterweight device according to this embodiment includes a main frame including a pair of main vertical beams, a plurality of main weights arranged inside the main frame and supported by the main frame, and a damper weight mechanism that presses the main weights with its own weight, placed on the uppermost of the plurality of main weights. The damper weight mechanism includes a damper frame including a damper lower beam and a pair of damper vertical beams that are slidable vertically along the corresponding main vertical beams, a plurality of damper weights arranged inside the damper frame and placed on the damper lower beams, an elastic member interposed between the damper weights and the damper lower beams, and a suspension point formed in the damper frame and used when lifting the damper weight mechanism. The damper weight mechanism is movable vertically between a first position on the main weights and a second position above the first position. The main vertical beams include notches for inserting and removing the main weights. When the damper weight mechanism is in the first position, the lower part of the notch is covered by the damper vertical beam. When the damper weight mechanism is in the second position, the upper part of the main weight in the notch is exposed from the damper vertical beam. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a schematic cross-sectional view showing an elevator system according to this embodiment. [Figure 2] Figure 2 is a front view showing the counterweight device according to this embodiment. [Figure 3] Figure 3 is a plan cross-sectional view of the damper frame of the counterweight device shown in Figure 2. [Figure 4] Figure 4 is a perspective view showing the damper weight mechanism shown in Figure 2. [Figure 5] Figure 5 is a perspective view showing the damper frame shown in Figure 4. [Figure 6] Figure 6 is a top view of the damper frame shown in Figure 5. [Figure 7] Figure 7 is a front view showing the damper weight mechanism of the counterweight device shown in Figure 2 in a lifted state. [Figure 8] Figure 8 is a flowchart showing the method for adjusting the weight balance of a counterweight device according to this embodiment. [Figure 9] Figure 9 is a flowchart showing a general method for adjusting the weight balance of a counterweight device. [Figure 10] Figure 10 is a plan view showing a modified example of the counterweight device shown in Figure 2. [Modes for carrying out the invention]

[0010] The counterweight device of the elevator in this embodiment will be described below with reference to the drawings. First, the elevator device according to this embodiment will be described.

[0011] As shown in Figure 1, the elevator system 1 comprises a car 3 and a counterweight 4 located within the hoistway 2. The car 3 and the counterweight 4 are connected via a main rope 5. The main rope 5 is wound around a traction sheave 6a and a deflection sheave 7 provided on the hoisting machine 6. The car 3 and the counterweight 4 move up and down as the hoisting machine 6 winds up the main rope 5. The car 3 moves up and down guided by a vertically extending car guide rail 8. The counterweight 4 moves up and down guided by a vertically extending counterweight guide rail 9. The hoisting machine 6 is installed in a machine room 10 located above the hoistway 2. A control panel 11 is installed in the machine room 10. The control panel 11 is a device that controls the entire elevator system 1, including the hoisting machine 6. For example, the control panel 11 controls the operation of the hoisting machine 6 in response to landing calls and car calls, and brings the elevator car 3 to the landing 12 of the registered floor.

[0012] Note that the elevator device 1 is not limited to the form shown in FIG. 1. For example, it may be a so-called machine-roomless elevator device. That is, without providing the machine room 10, the hoisting machine 6 and the control panel 11 may be provided above the hoistway 2 or the like.

[0013] Next, the counterweight device of the elevator according to the present embodiment (hereinafter simply referred to as the counterweight device 20) will be described. The counterweight device 20 corresponds to the counterweight 4 shown in FIG. 1. In the following description, the first direction is the lateral direction, the second direction is the front-rear direction, and the third direction is the vertical direction. The left-right direction when the counterweight device 20 is viewed from the front corresponds to the lateral direction. The front is the surface facing the inside of the hoistway 2. The front-rear direction is the direction orthogonal to the lateral direction in plan view, and the vertical direction is the direction orthogonal to the lateral direction and the front-rear direction.

[0014] As shown in FIG. 2, the counterweight device 20 may include a main frame 30, a main weight body 40, and a damper weight mechanism 50.

[0015] The main frame 30 includes a main lower beam 31, a pair of main vertical beams 32, and a main upper beam 33.

[0016] The main lower beam 31 extends in the lateral direction. The main weight body 40 is placed on the main lower beam 31.

[0017] The main vertical beams 32 extend upward from both ends of the main lower beam 31 in the lateral direction. The main vertical beams 32 may be fixed to the corresponding ends of the main lower beam 31. The main vertical beams 32 are spaced apart in the lateral direction. As shown in FIG. 3, the main vertical beams 32 may include recesses 32a that open inward.

[0018] As shown in FIG. 3, the main longitudinal beam 32 may be a U-shaped steel. The main longitudinal beam 32 may include a longitudinal beam base portion 32b and a pair of longitudinal beam protruding portions 32c protruding from the longitudinal beam base portion 32b to the inside of the main frame 30. The longitudinal beam base portion 32b may be formed flat along the vertical direction and the front-rear direction. The longitudinal beam protruding portion 32c protrudes toward the main weight body 40 and may extend in the vertical direction. The pair of longitudinal beam protruding portions 32c are spaced apart in the front-rear direction.

[0019] As shown in FIG. 2, each main longitudinal beam 32 includes a notch 34 for inserting and removing the main weight body 40. The notch 34 is formed in at least one of the longitudinal beam protruding portions 32c. The notch 34 may be formed in the longitudinal beam protruding portion 32c arranged on the front side. The notch 34 may or may not be formed in the longitudinal beam protruding portion 32c arranged on the rear side. The notch 34 is formed to extend in the vertical direction. The notch 34 may extend from the upper part of the main longitudinal beam 32 to the middle part of the main longitudinal beam 32. The lower part of the notch 34 may be arranged above the main weight body 40. The lower part of the notch 34 may be arranged above the main weight body 40 located at the uppermost position among the plurality of main weight bodies 40.

[0020] As shown in FIG. 2, the main upper beam 33 extends horizontally from the upper end portion of one main longitudinal beam 32 to the upper end portion of the other main longitudinal beam 32. Both lateral ends of the main upper beam 33 may be fixed to the corresponding main longitudinal beam 32.

[0021] The main weight 40 is supported by the main lower beam 31 inside the main frame 30. The main weight 40 is placed on the main lower beam 31 and stacked. The main weight 40 is locked to the main vertical beam 32. As shown in Figure 3, both ends of the main weight 40 in the lateral direction are engaged with the main vertical beam 32. More specifically, the main weight 40 includes a pair of protrusions 40a inserted into the recesses 32a of the main vertical beam 32, and the protrusions 40a are inserted into the recesses 32a of the main vertical beam 32 and engage with the main vertical beam 32. The main weight 40 may be made primarily of concrete or of metal plate. As shown in Figure 2, a relatively thick main weight 40 made of concrete may be placed at the bottom, and a relatively thin main weight 40 made of metal plate may be placed at the top.

[0022] As shown in Figure 2, the damper weight mechanism 50 is mounted on the uppermost of the multiple main weights 40 and is configured to press against the main weight 40 with its own weight. The damper weight mechanism 50 may also be configured as a dynamic vibration absorber to reduce vibrations of the counterweight device 20 during lifting and lowering. The damper weight mechanism 50 will be described below.

[0023] As shown in Figures 2 and 4, the damper weight mechanism 50 may include a damper frame 60, a plurality of damper weights 70, a plurality of elastic members 71, a damper support base 72, a spacer 73, and a plurality of stoppers 74.

[0024] The damper frame 60 is placed on the main weight 40. The damper frame 60 includes a damper lower beam 61, a pair of damper vertical beams 62, a damper upper beam 63, and suspension holes 64.

[0025] The damper lower beam 61 extends laterally. The damper lower beam 61 is configured to be able to contact the upper surface of the main weight 40 and to be able to support the damper weight 70.

[0026] As shown in Figures 4 and 5, the damper longitudinal beams 62 extend upward from both lateral ends of the damper lower beam 61. The damper longitudinal beams 62 are slidable vertically along the corresponding main longitudinal beams 32. The damper longitudinal beams 62 may be fixed to the corresponding ends of the damper lower beam 61. A pair of damper longitudinal beams 62 are spaced apart laterally. Each damper longitudinal beam 62 may include a pair of longitudinal beam members 62a and a connecting member 62b.

[0027] The vertical beam members 62a extend vertically along the corresponding main vertical beams 32. The vertical beam members 62a may be formed flat in both the vertical and lateral directions. As shown in Figures 4 and 6, the vertical beam members 62a are slidable on the front and rear surfaces of the main vertical beams 32. More specifically, the front-positioned vertical beam member 62a is slidable on the front surface of the corresponding main vertical beam 32. The rear-positioned vertical beam member 62a is slidable on the rear surface of the corresponding main vertical beam 32. The front-positioned vertical beam member 62a is the lateral end of the damper lower beam 61 and is fixed to the front surface of the damper lower beam 61. The rear-positioned vertical beam member 62a is the lateral end of the damper lower beam 61 and is fixed to the rear surface of the damper lower beam 61.

[0028] As shown in Figures 4 and 5, the connecting member 62b connects the upper ends of a pair of vertical beam members 62a. As shown in Figures 4 and 6, the connecting member 62b is formed to surround the corresponding main vertical beam 32 from the outside when viewed from above. As shown in Figures 4 to 6, the connecting member 62b is formed in a U-shape when viewed from above. The main vertical beam 32 passes through the space formed inside the connecting member 62b, and the connecting member 62b is slidable on the vertical beam base portion 32b of the main vertical beam 32.

[0029] The connecting member 62b includes a contact portion 62c. The contact portion 62c abuts against the outer surface of the corresponding main vertical beam 32 in the lateral direction. The contact portion 62c abuts against the vertical beam base portion 32b. As shown in Figure 5, the contact portion 62c has a bolt hole 62d through which a frame bolt 65, described later, passes. The bolt hole 62d may be formed in an elongated shape along the vertical direction.

[0030] As shown in Figures 4 and 5, the damper upper beam 63 connects a pair of damper vertical beams 62. It extends laterally from the upper end of one damper vertical beam 62 to the upper end of the other damper vertical beam 62. The damper upper beam 63 may include a pair of upper beam members 63a. The upper beam members 63a extend laterally. The upper beam members 63a may be formed flat in the vertical and lateral directions. Both lateral ends of the damper upper beam 63 are fixed to the corresponding damper vertical beams 62. As shown in Figure 6, one end of the front-positioned upper beam member 63a is fixed to the vertical beam member 62a positioned in front of the corresponding damper vertical beam 62, and the other end is fixed to the vertical beam member 62a positioned in front of the other damper vertical beam 62. The front-positioned upper beam member 63a is fixed to the rear surface of the front-positioned vertical beam member 62a. One end of the rear-facing upper beam member 63a is fixed to the rear-facing vertical beam member 62a of the corresponding damper vertical beam 62, and the other end is fixed to the rear-facing vertical beam member 62a of the other damper vertical beam 62. The rear-facing upper beam member 63a is fixed to the front surface of the rear-facing vertical beam member 62a.

[0031] As shown in Figures 4 and 5, the suspension holes 64 are formed in the damper frame 60 and are used when lifting the damper weight mechanism 50. The suspension holes 64 are an example of a suspension source. The suspension holes 64 are formed in each upper beam member 63a of the damper upper beam 63. The suspension source is not limited to the suspension holes 64 as long as the damper weight mechanism 50 can be lifted. Also, the suspension holes 64 are not limited to being formed in the damper upper beam 63 as long as the damper weight mechanism 50 can be lifted.

[0032] As shown in Figures 2 and 4, the damper weights 70 are supported by the damper lower beam 61 of the damper frame 60. The damper weights 70 are placed horizontally inside the damper frame 60 and stacked vertically. The damper weights 70 are placed on the damper lower beam 61 via elastic members 71 and stacked. The damper weights 70 may be made of metal plates. The damper weights 70 are attached to the damper frame 60 by a plurality of weight bolts 75 (not shown). The weight bolts 75 may also fix the damper weights 70 to a damper support base 72, which will be described later. The weight bolts 75 may pass through the plurality of damper weights 70.

[0033] The elastic members 71 are interposed between the damper weight 70 and the damper lower beam 61. Multiple elastic members 71 are interposed between the damper weight 70 and the damper lower beam 61. The elastic members 71 may be made of, for example, a coil spring or rubber. The elastic members 71 are compressed by the load of the damper weight 70. With this configuration, the damper weight mechanism 50 can act to cancel out vibrations of the counterweight device 20.

[0034] The damper support base 72 is interposed between the elastic member 71 and the damper weight 70. The damper support base 72 may be formed flat along the lateral and longitudinal directions. The damper weight 70 is placed on the damper support base 72 and supports the load of the damper weight 70.

[0035] The spacer 73 is interposed between the damper support base 72 and the damper weight 70. Multiple spacers 73 may be interposed between the damper support base 72 and the damper weight 70. The spacer 73 creates a space between the damper support base 72 and the damper weight 70, preventing bolts for attaching the elastic member 71 from interfering with the damper weight 70.

[0036] The stopper 74 is interposed between the damper lower beam 61 and the damper support base 72. The stopper 74 prevents the damper support base 72 from getting too close to the damper lower beam 61. The stopper 74 may be made of, for example, a bolt.

[0037] The damper weight mechanism 50 configured in this way is movable vertically between a first position and a second position. The first position is the position in which the damper weight mechanism 50 is placed on the main weight body 40, as shown in Figure 2. The second position is a position above the first position, as shown in Figure 7, in which the damper weight mechanism 50 is suspended. The damper weight mechanism 50 is movable vertically relative to the main frame 30.

[0038] As shown in Figure 2, when the damper weight mechanism 50 is in the first position, the lower part of the notch 34 of the main vertical beam 32 is covered by the damper vertical beam 62. More specifically, the lower part of the notch 34 formed in the vertical beam projection 32c located in front of the main vertical beam 32 is covered by the vertical beam member 62a located in front of the damper vertical beam 62. Since the vertical beam member 62a is located in front of the damper vertical beam 62, the lower part of the notch 34 is not exposed from the vertical beam member 62a when viewed from the front. The upper part of the notch 34 may be exposed from the vertical beam member 62a. However, if space for movement of the damper weight mechanism 50 can be secured, the upper part of the notch 34 may be covered by the vertical beam member 62a. In this case, the entire notch 34 may be covered by the vertical beam member 62a.

[0039] When the damper weight mechanism 50 is in the first position, the damper vertical beam 62 is bolted to the main vertical beam 32. More specifically, as shown in Figure 4, the connecting member 62b of the damper vertical beam 62 is fixed to the main vertical beam 32 with frame bolts 65. The contact portion 62c of the connecting member 62b is fastened to the vertical beam base portion 32b with frame bolts 65. When moving the damper weight mechanism 50 to the second position, the frame bolts 65 are removed.

[0040] As shown in Figure 7, when the damper weight mechanism 50 is in the second position, the upper portion of the notch 34 above the main weight 40 is exposed from the damper vertical beam 62. The second position is a position in which the upper portion of the notch 34 above the main weight 40 can be exposed from the damper vertical beam 62. More specifically, the notch 34 formed in the vertical beam projection 32c located on the front side of the main vertical beam 32 is not covered by the vertical beam member 62a located on the front side of the damper vertical beam 62. Therefore, when viewed from the front, the upper portion of the notch 34 above the main weight 40 is exposed from the vertical beam member 62a, and the main weight 40 can be inserted into and removed through the notch 34.

[0041] Next, the operation of this embodiment, which has the above configuration, will be described. Here, the method for adjusting the weight balance of the counterweight device 20 shown in Figure 2 will be explained using Figures 7 and 8.

[0042] First, the main frame 30 of the counterweight device 20 is attached to the weight guide rail 9, and then the main weight body 40 is placed on the main lower beam 31 of the main frame 30 (step S1).

[0043] Next, the damper weight mechanism 50 is installed (step S2). In this case, the damper frame 60 is attached to the main frame 30, and then the damper weight 70 is placed on the damper lower beam 61 inside the damper frame 60. The damper weight 70 is inserted from the upper part of the notch 34 of the main vertical beam 32 while the damper frame 60 is placed on the main weight 40. At this time, the elastic member 71, stopper 74, damper support base 72 and spacer 73 are attached to the damper lower beam 61 of the damper frame 60, and the damper weight 70 is placed on the damper support base 72 via the spacer 73. In this case, the damper weight mechanism 50 is in the first position where it is placed on the main weight 40, and the damper vertical beam 62 is fixed to the main vertical beam 32 with the frame bolts 65 described above. The lower part of the notch 34 formed in the main vertical beam 32 is covered by the damper vertical beam 62.

[0044] Next, check whether the weight of the counterweight device 20 is within the acceptable range (step S3). If the weight of the counterweight device 20 is within the acceptable range, complete the assembly of the counterweight device 20. On the other hand, if the weight of the counterweight device 20 is outside the acceptable range, proceed to step S4 below.

[0045] In step S4, the lifting machine 80 is installed. The lifting machine 80 may be attached, for example, to a connecting beam 81 connected to the upper end of the weight guide rail 9 for the counterweight device 20. A hoisting machine 6 may be installed on the connecting beam 81.

[0046] Next, the damper weight mechanism 50 is lifted (step S5). In this case, a hook (not shown) is attached to the end of the lifting rope 82 suspended from the hook 80a of the lifting machine 80, and it is hung on the suspension hole 64 formed in the damper upper beam 63 of the damper frame 60. The frame bolts 65 mentioned above are also removed. After that, the lifting machine 80 is driven to raise the damper weight mechanism 50 relative to the main frame 30. As a result, the damper weight mechanism 50 moves upward to the second position, and the lower part of the notch 34 formed in the main vertical beam 32 is exposed from the damper vertical beam 62.

[0047] Next, the number of main weights 40 is adjusted (step S6). The main weights 40 are inserted and removed through the lower part of the notch 34 exposed from the damper vertical beam 62. To increase the number of main weights 40, the main weights 40 are inserted into the inside of the main frame 30 through the notch 34. On the other hand, to decrease the number of main weights 40, the main weights 40 are removed from the inside of the main frame 30 through the notch 34.

[0048] Next, the damper weight mechanism 50 is lowered from the second position to the first position and placed on the main weight body 40 (step S7). At this time, the notch 34 is covered by the damper vertical beam 62. Subsequently, the lifting rope 82 is removed from the damper weight mechanism 50 (step S8).

[0049] Then, return to step S3 and check the weight of the counterweight device 20. If the weight of the counterweight device 20 is within the acceptable range, the assembly of the counterweight device 20 is completed. At this time, the lifting machine 80 is removed from the connecting beam 81. On the other hand, if the weight of the counterweight device 20 is outside the acceptable range, perform steps S4 to S7 described above.

[0050] In this way, the weight balance of the weight can be adjusted.

[0051] Incidentally, in a typical counterweight device, if the weight of the counterweight device is outside the acceptable range in step S3 described above, the damper weight mechanism is first disassembled (step S11). The disassembled damper frame and damper weight, and other parts, are removed from the main frame 30.

[0052] Next, the number of main weights 40 is adjusted to perform weight balance adjustment (step S12). Since the damper weight mechanism has been disassembled, the main weights 40 are inserted and removed through the lower part of the notch 34, as in step S6 described above.

[0053] Next, the damper weight mechanism is installed (step S13). In this case, the damper frame is attached to the main frame 30 in the same manner as in step S2 described above, and then the damper weight is placed inside the damper frame.

[0054] Afterward, return to step S3 described above and check the weight of the counterweight device. If the weight of the counterweight device is within the acceptable range, complete the assembly of the counterweight device. On the other hand, if the weight of the counterweight device is outside the acceptable range, perform steps S11 to S13 described above.

[0055] As described above, according to this embodiment, the damper weight mechanism 50, which is mounted on the uppermost main weight 40 among the multiple main weights 40, includes a suspension hole 64 used when lifting the damper weight mechanism 50, and is movable vertically between a first position mounted on the main weight 40 and a second position above the first position. The lower part of the notch 34 is covered by the damper vertical beam 62 when the damper weight mechanism 50 is in the first position. When the damper weight mechanism 50 is in the second position, the upper part of the notch 34 above the main weight 40 is exposed from the damper vertical beam 62. As a result, the damper weight mechanism 50 can be lifted using the suspension hole 64 and moved to the second position where the upper part of the notch 34 above the main weight 40 is exposed. Therefore, the main weights 40 can be inserted and removed through the notch 34, and the number of main weights 40 can be adjusted. As a result, even when the damper weight mechanism 50 is installed, the weight balance can be easily adjusted.

[0056] Furthermore, according to this embodiment, the damper frame 60 includes a damper upper beam 63 connecting a pair of damper vertical beams 62, and the suspension holes 64 are formed in the damper upper beam 63. This allows the lifting rope 82 to be easily attached to the suspension holes 64, and the damper weight mechanism 50 to be easily lifted.

[0057] Furthermore, according to this embodiment, a suspension hole 64 is formed in the damper upper beam 63 to serve as a suspension point. This makes it easier to attach the lifting rope 82 to the suspension hole 64, and thus easier to lift the damper weight mechanism 50. In addition, it is possible to prevent the suspension hole 64 from protruding in the front-rear direction from the damper frame 60, thereby preventing interference with other parts.

[0058] Furthermore, according to this embodiment, when the damper frame 60 is in the first position, the damper vertical beam 62 is bolted to the main vertical beam 32. This prevents the damper frame 60 from moving relative to the main frame 30, and fixes the damper frame 60 to the main frame 30.

[0059] Furthermore, according to this embodiment, each damper vertical beam 62 includes a contact portion 62c that abuts against the outer surface of the corresponding main vertical beam 32 in the lateral direction. This allows the damper frame 60 to be moved vertically along the main vertical beam 32.

[0060] Furthermore, according to this embodiment, the multiple damper weights 70 are attached to the damper frame 60 by weight bolts 75 that pass through the damper weights 70. This prevents the damper weights 70 from moving in the lateral and longitudinal directions.

[0061] In the above-described embodiment, an example was given in which the notch 34 of the main vertical beam 32 extends from the upper part of the main vertical beam 32 to the middle part of the main vertical beam 32. However, this embodiment is not limited to this. For example, as shown in Figure 10, the notch 34 may extend from the upper part of the main vertical beam 32 to the lower part of the main vertical beam 32. The lower part of the notch 34 shown in Figure 10 is located below the main vertical beam 32. In this case, the damper vertical beam 62 of the damper frame 60 may extend below the damper lower beam 61. More specifically, when the damper weight mechanism 50 is in the first position, the lower part of the damper vertical beam 62 may extend to the lower part of the main vertical beam 32. In this case, the lower part of the notch 34 is covered by the damper vertical beam 62. In this case, the convex portion 40a of the main weight body 40 may engage with the vertical beam member 62a of the damper vertical beam 62. By moving the damper weight mechanism 50 to a second position above the first position, the upper portion of the main weight 40 within the notch 34 can be exposed, allowing the main weight 40 to be inserted and removed. The example shown in Figure 10 is effective when the number of main weights 40 is small.

[0062] Furthermore, in the example shown in Figure 10, a damper weight mechanism 50 is mounted on the main weight 40, but the damper weight mechanism 50 does not have to be mounted. More specifically, in the example shown in Figure 10, the damper weight mechanism 50 may be removed, and a plate member (not shown) in place of the damper vertical beam 62 may be used to cover the notch 34 of the main vertical beam 32. The plate member may be fixed to the main vertical beam 32 with bolts or the like. In this way, even in the main frame 30 in which the notch 34 shown in Figure 10 is formed, the main weight 40 can be locked with the plate member without using the damper weight mechanism 50.

[0063] According to the embodiments described above, even when the damper weight mechanism 50 is installed, the weight balance can be easily adjusted.

[0064] 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 novel embodiments can be implemented 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]

[0065] 20: Counterweight device, 30: Main frame, 32: Main vertical beam, 34: Notch, 40: Main weight, 50: Damper weight mechanism, 60: Damper frame, 61: Damper lower beam, 62: Damper vertical beam, 62c: Contact part, 63: Damper upper beam, 64: Suspension hole, 70: Damper weight, 71: Elastic member, 75: Weight bolt

Claims

1. A main frame including a pair of main vertical beams, A plurality of main weights are arranged inside the main frame and supported by the main frame, A damper weight mechanism is placed on the uppermost of the multiple main weights, and presses the main weight with its own weight. Equipped with, The damper weight mechanism is, A damper frame including a damper lower beam and a pair of damper vertical beams that are slidable vertically along the corresponding main vertical beam, A plurality of damper weights arranged inside the damper frame, wherein a plurality of damper weights are placed on the damper lower beam, An elastic member interposed between the damper weight and the damper lower beam, A suspension point formed in the damper frame and used when lifting the damper weight mechanism, Includes, The damper weight mechanism is movable vertically between a first position on the main weight and a second position above the first position. The main vertical beam includes a notch for inserting and removing the main weight, When the damper weight mechanism is in the first position, the lower part of the notch is covered by the damper vertical beam. When the damper weight mechanism is located in the second position, the portion of the notch above the main weight is exposed from the damper vertical beam. Elevator counterweight mechanism.

2. The damper frame includes a damper upper beam connecting a pair of damper vertical beams, The suspension point is formed on the damper upper beam, The counterweight device for an elevator according to claim 1.

3. The suspension point includes a suspension hole formed in the damper upper beam. The counterweight device for an elevator according to claim 2.

4. When the damper frame is in the first position, the damper vertical beam is bolted to the main vertical beam. The counterweight device for an elevator according to any one of claims 1 to 3.

5. The direction from one of the pair of main vertical beams toward the other is defined as the first direction. Each of the damper longitudinal beams includes a contact portion that abuts against the outer surface of the corresponding main longitudinal beam in the first direction. The counterweight device for an elevator according to any one of claims 1 to 3.

6. Multiple damper weights are attached to the damper frame by weight bolts that pass through the damper weights. The counterweight device for an elevator according to any one of claims 1 to 3.

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