Counterweight for an elevator

Abstract

To provide a balance weight of an elevator excellent in carry-in property to a hoistway.SOLUTION: The counterweight 2 of the elevator includes a plurality of weight pieces 10 and a weight frame 20 for holding the plurality of loaded weight pieces 10. The weight frame 20 includes a first weight frame 21 to which a main rope 3 connected to the car 1 is fixed, and a second weight frame 22 arranged below the first weight frame 21. The first weight frame 21 has a first connecting projection 31, and the second weight frame 22 has a second connecting projection 32. The first weight frame 21 and the second weight frame 22 are separably connected to each other through a connecting projection 31,32.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an elevator counterweight. [Background technology]

[0002] In general, a traction elevator has a counterweight attached to the other end of the main rope connected to the car, and the car and counterweight are balanced in a bucket-like fashion, allowing the car to be efficiently raised and lowered by the hoist. The counterweight includes multiple weight pieces and a weight frame that holds them. The weight of the counterweight is designed to be the sum of the weight of the car and the weight of the rated load multiplied by, for example, 1 / 2, but as an example, it may be the sum of the weight of the car and the weight of 0.45 to 0.6 times the rated load. Depending on the weight of the car, several dozen weight pieces may be required, and the total length of the weight frame that holds them may reach several meters.

[0003] Patent Document 1 discloses an elevator counterweight that is configured so that weight pieces can be loaded in the gaps in the lower beam of the weight frame. Patent Document 1 also describes the effect of making it possible to reduce the overall length of the weight frame compared to conventional methods. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-122560 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, there are cases where an existing weight frame needs to be removed and a new weight frame needs to be installed because it does not meet earthquake resistance standards, or where there is no space left in the existing weight frame to load additional weight pieces, and a new weight frame needs to be installed to balance the increased weight of the car during renovation work. In such cases, if the weight frame is long, it may be difficult to transport it into the hoistway.

[0006] Furthermore, if the weight frame is disassembled and made up of multiple parts (upper beam, vertical frame, lower beam) bolted together, it may be possible to carry the multiple parts disassembled into the hoistway and assemble them inside the hoistway. Disassembling and assembling the weight frame is a heavy burden on workers, and since renovation work on the counterweight requires the suspension of use of elevators and other facilities, there is a need to shorten the work time.

[0007] Furthermore, weight frames with a total length greater than a certain length may distort and open during an earthquake, causing the weight pieces to fall, so a frame band must be installed in the middle of the weight frame to prevent deformation of the weight frame.

[0008] The weight frame disclosed in Patent Document 1 is configured so that weight pieces can be loaded into the gap in the lower beam of the weight frame, and the overall length of the weight frame can be reduced by at least the length of the lower beam, but it does not reduce the overall length of the weight frame to the extent that it improves ease of transport into the elevator shaft. [Means for solving the problem]

[0009] The elevator counterweight of the present invention comprises a plurality of weight pieces and a weight frame that holds the plurality of weight pieces that are loaded, and the weight frame includes a first weight frame to which a main rope connected to the elevator car is fixed, and a second weight frame that is positioned below the first weight frame, and at least one of the first weight frame and the second weight frame has a connecting protrusion that protrudes toward the other of the first weight frame and the second weight frame, and is detachably connected to the other of the first weight frame and the second weight frame via the connecting protrusion. [Effects of the Invention]

[0010] The elevator counterweight of the present invention allows the weight frame to be separated into two or more frames, greatly improving ease of transport into the hoistway. This eliminates the need to disassemble and reassemble the weight frame, such as by removing bolts, disassembling the weight frame into multiple components, and then reassembling the weight frame within the hoistway. Furthermore, because the connecting portions protrude from the frames, it is easy to align the frames with each other, and multiple frames can be connected within the hoistway to easily create a weight frame of the desired weight. This reduces the burden on workers and improves usability by shortening the work time.

[0011] Furthermore, since the overall length of each weight frame can be reduced, there is no need to install a frame band in the middle of the weight frame, further reducing the burden on the worker. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a diagram illustrating a schematic configuration of an elevator as an example of an embodiment. [Figure 2] FIG. 1 is a front view of a counterweight according to an embodiment; [Figure 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] FIG. 10 is a front view of a counterweight according to another embodiment. [Figure 5] FIG. 1 is a front view of a conventional counterweight. DETAILED DESCRIPTION OF THE INVENTION

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the embodiments described below are merely examples, and the present invention is not limited to the following embodiments.

[0014] FIG. 1 is a diagram showing a schematic configuration of an elevator according to an embodiment. As shown in FIG. 1, the elevator according to an embodiment includes a car 1 and a counterweight 2. The car 1 and the counterweight 2 are installed in a bucket-like arrangement in an elevator shaft 7, with the car 1 and the counterweight 2 connected to both ends of a main rope 3. The counterweight 2 includes a plurality of weight pieces 10 and a weight frame 20 that holds the plurality of weight pieces 10 that are loaded on it. As will be described in detail later, the weight frame 20 includes a first weight frame 21 to which the main rope 3 connected to the car 1 is fixed, and a second weight frame 22 that is arranged below the first weight frame 21, and the respective weight frames are separably connected via a connecting portion 30.

[0015] The main rope 3 is wound around a hoisting machine 5 and a deflector sheave 6. The hoisting machine 5 and the deflector sheave 6 are installed in a machine room 4 provided above a hoistway 7. An elevator as an example of an embodiment is configured such that the hoisting machine 5 winds up or pays out the main rope 3, causing the car 1 and the counterweight 2 to move up and down relatively within the hoistway 7.

[0016] Buffers 8 and 9 are installed on the hoistway floor 7a at positions opposite the car 1 and counterweight 2, respectively. The buffers 8 and 9 are devices that come into contact with the bottom of the car 1 or counterweight 2 to cushion the impact when the car 1 or counterweight 2 descends too far within the hoistway 7 in the event of an abnormality such as loosening or breaking of the main rope 3. The buffers 8 and 9 may be spring-type buffers that use the elastic force of a spring, or oil-filled buffers that use hydraulic resistance. Spacers 1a and 2a are installed at the bottom ends of the car 1 and counterweight 2, respectively.

[0017] Next, the configuration of the weight frame 20 of the counterweight 2 will be described with reference to Fig. 2. Fig. 2 is a front view of the counterweight 2. For ease of explanation, the near side of Fig. 2 will be referred to as the front of the counterweight 2, the far side as the rear, and the direction perpendicular to the plane of Fig. 2 will be referred to as the front-to-rear direction of the counterweight 2. For comparison, a conventional counterweight 100 is shown in Fig. 5.

[0018] As shown in FIG. 2, the weight frame 20 of the counterweight 2 includes a first weight frame 21 with a total length L1 and a second weight frame 22 with a total length L2 that is positioned below the first weight frame 21. As will be described in detail later, the total lengths L1 and L2 of each weight frame are shorter than the total length L of the weight frame 102 of the conventional counterweight 100 shown in FIG. 5. As described above, the first weight frame 21 and the second weight frame 22 are separably connected to each other via the connecting portion 30. The weight frame 20 is transported into the hoistway 7 (see FIG. 1) with the first weight frame 21 and the second weight frame 22 separated, which provides excellent transportability into the hoistway 7. The first weight frame 21 and the second weight frame 22 can be easily connected within the hoistway 7.

[0019] The first weight frame 21 and the second weight frame 22 have a rectangular frame structure for loading a plurality of weight pieces 10, and are formed, for example, from an alloy whose main component is iron. Each weight frame has a rectangular outer shape when viewed from the front, and is arranged so that its length is along the length (vertical direction) of the hoistway 7. Weight guide rails (not shown) for guiding the elevation of the counterweight 2 are installed in the hoistway 7 along the vertical direction, sandwiching the counterweight 2 from both sides in the width direction. Generally, guide shoes (not shown) are attached to the weight frame 20, and the weight frame 20 is attached to the weight guide rails via the guide shoes.

[0020] The first weight frame 21 is a weight frame to which the main rope 3 is fixed, and includes an upper beam 21a forming the upper edge of the weight frame, a pair of vertical frames 21b extending in the vertical direction, and a lower beam 21c forming the lower edge. The upper ends of the pair of vertical frames 21b are fixed to both ends of the upper beam 21a extending horizontally, and the lower ends of the pair of vertical frames 21b are fixed to both ends of the lower beam 21c extending horizontally. As shown in Figure 2, each part may be fixed with bolts and nuts, etc., but is not limited to this, and may also be fixed by welding, etc.

[0021] The upper beam 21a of the first weight frame 21 is, for example, a hollow or solid steel structure, and is provided with through holes 24 for fixing the main ropes 3, the same number as the number of main ropes 3. The ends of the multiple main ropes 3 are each fixed to a rope socket 36 using a well-known terminal processing method, and are each connected to a fixed rod 37 via the rope socket 36. The fixed rod 37 is a rod-shaped member, the upper end of which is fixed to the rope socket 36 with a rod pin, and the lower end has a male thread portion. The fixed rod 37 connected to the main ropes 3 is inserted through the through hole 24 and protrudes below the upper beam 21a of the first weight frame 21. The main ropes 3 are fixed to the first weight frame 21 by attaching a nut 38 to the protruding male thread portion. For example, a double nut combining a type 3 nut and a type 1 nut is used as the nut 38.

[0022] The vertical frames 21b of the first weight frame 21 are, for example, a pair of C-shaped steel beams with grooves on the inside. The weight pieces 10 to be loaded have protrusions formed on both ends in the width direction that fit into the grooves of the vertical frames 21b. The grooves of the vertical frames 21b fit into the protrusions on both ends of the weight pieces 10, preventing the weight pieces 10 from moving in the width direction and the depth direction within the weight frame when the counterweight 2 is raised or lowered. The vertical frames 21b may also have holes for preventing the weight pieces from falling off. By fastening bolts or anti-fall jigs to the holes for preventing the weight pieces 10 from moving up and down within the weight frame or falling off from the weight frame when the counterweight 2 is raised or lowered.

[0023] A first connecting protrusion 31 that protrudes toward the second weight frame 22 is provided on the lower beam 21c of the first weight frame 21. The lower beam 21c is, for example, a hollow or solid steel structure, and the first connecting protrusion 31 protrudes from the surface of the lower beam 21c that faces the second weight frame 22. The first connecting protrusion 31 is fixed to the lower beam 21c, for example, by welding or the like. The first connecting protrusion 31 engages with a second connecting protrusion 32, described later, of the second weight frame 22, to form a connecting portion 30.

[0024] Two first connecting protrusions 31 are arranged, one on each side, at positions equidistant from the longitudinal center of the lower beam 21c (the widthwise center of the weight frame 20). The load of the second weight frame 22 acts on the first weight frame 21 via the first connecting protrusions 31, and in this case, a substantially equal load acts on the two connecting protrusions 31. As a result, the first weight frame 21 can stably support the second weight frame 22.

[0025] The first connecting protrusions 31 are provided at positions that do not protrude outward in the width direction of the weight frame 20 from both longitudinal ends of the lower beam 21c so as not to interfere with the weight guide rails. It is also preferable that the first connecting protrusions 31 are provided so as not to protrude in the front-to-rear direction of the first weight frame 21. In this embodiment, the connecting protrusions 31 are provided in a range that overlaps with the lower beam 21c in the up-down direction, between the longitudinal center of the lower beam 21c and both longitudinal ends. The number of first connecting protrusions 31 is not limited to two and may be, for example, one, or three or more, but it is preferable to arrange the connecting protrusions in a balanced manner as in this embodiment.

[0026] The size of the first connecting protrusion 31 is not particularly limited, but it is preferably a size that allows it to be connected to the second connecting protrusion 32 and does not interfere with the work of transporting it into the hoistway 7 and connecting the first weight frame 21 and the second weight frame 22 within the hoistway 7. It is also preferable that the two connecting protrusions 31 have substantially the same shape and size. In this case, the durability of the connecting protrusion 31 is improved and the connected state of the weight frames becomes more stable.

[0027] Similar to the first weight frame 21, the second weight frame 22 includes an upper beam 22a forming the upper edge of the weight frame, a pair of vertical frames 22b extending in the vertical direction, and a lower beam 22c forming the lower edge. The upper ends of the pair of vertical frames 22b are fixed to both ends of the horizontally extending upper beam 22a, and the lower ends of the pair of vertical frames 22b are fixed to both ends of the horizontally extending lower beam 22c. As shown in FIG. 2, each part may be fixed with bolts and nuts or the like, but is not limited to this and may also be fixed by welding or the like.

[0028] A second connecting protrusion 32 is provided on the upper beam 22a of the second weight frame 22, protruding toward the first weight frame 21. The upper beam 22a is, for example, a hollow or solid structural steel, and the second connecting protrusion 32 protrudes from the surface of the upper beam 22a that faces the first weight frame 21. The second connecting protrusion 32 is fixed to the upper beam 22a, for example, by welding or the like.

[0029] The second connecting protrusion 32 is provided at a position where it can be connected to the first connecting protrusion 31 of the first weight frame 21. Specifically, a total of two second connecting protrusions 32 are arranged, one on each side at positions equidistant from the longitudinal center of the upper beam 22a. The size of the second connecting protrusion 32 is not particularly limited, but it is preferably large enough to enable connection to the first connecting protrusion 31 and not interfere with transport into the hoistway 7 or with the operation of connecting the first weight frame 21 and the second weight frame 22 within the hoistway 7. It is also preferable that the two connecting protrusions 32 have substantially the same shape and size.

[0030] A spacer 2a is provided on the lower beam 22c of the second weight frame 22, protruding in the opposite direction from the first weight frame 21. The spacer 2a is fixed to the lower beam 22c, for example, by welding. The spacer 2a is the part that comes into contact with the shock absorber 9 (see FIG. 1) in the event of an abnormality. The spacer 2a is made of a metal pillar or the like, and protrudes in the direction of the shock absorber 9 on the hoistway floor 7a.

[0031] Like the vertical frame 21b of the first weight frame 21, the vertical frame 22b of the second weight frame 22 may be a pair of C-shaped steel beams having recessed grooves that can fit with the protrusions on both ends of the weight piece 10. In this case, by making the vertical frame 22b exactly the same shape as the vertical frame 21b, it becomes possible to standardize the parts that make up the weight frame 20, and there is no need to select parts when assembling each weight frame in advance, thereby reducing the work time.

[0032] The size of the first weight frame 21 and the second weight frame 22 is not particularly limited, but is set to a size that allows them to be carried into the elevator shaft 7 through the elevator entrance as a fixed rectangular frame structure. In this case, there is no need to disassemble each weight frame into multiple parts (upper beam, vertical frame, lower beam), which reduces the burden on workers and improves usability by shortening the work time. The overall length L1 of the first weight frame 21 may be different from the overall length L2 of the second weight frame 22, but in this embodiment, they are substantially the same. In this case, handling of each weight frame is easier than when the overall lengths L1 and L2 are different.

[0033] The overall length L1 of the first weight frame 21 and the overall length L2 of the second weight frame 22 are shorter than the overall length L of the weight frame 102 of the conventional counterweight 100 shown in Fig. 5. The total length (L1 + L2) of the first weight frame 21 and the second weight frame 22 may be longer than the overall length L of the weight frame 102, but, for example, if the weight of the counterweight 2 is approximately the same as the weight of the counterweight 100, the total length (L1 + L2) may be the same as or shorter than the overall length L of the weight frame 102. If the overall lengths L1 and L2 of each weight frame are approximately half the overall length L of the weight frame 102, the ease of transporting the weight frame 20 into the hoistway 7 is significantly improved compared to the weight frame 102.

[0034] As shown in FIG. 5, the conventional counterweight 100, like the weight frame 20, comprises a plurality of weight pieces 101 and a weight frame 102 that holds them. However, as described above, the counterweight 100 differs from the weight frame 20 in that the weight frame 102 has a long overall length L and is equipped with a frame band 103 attached to the weight frame 102. The frame band 103 has a ring-shaped structure that surrounds the weight frame 102 horizontally and is attached to the middle of the vertical frame with a bolt or the like. The frame band 103 functions to prevent the weight frame 102 from warping and opening during an earthquake or other such event, causing the weight pieces 101 loaded inside to fall out.

[0035] The weight frame 20 is constructed by connecting a first weight frame 21 and a second weight frame 22, each of which has a shorter overall length L1, L2 than a conventional weight frame 102. The overall lengths L1, L2 of each weight frame that constitutes the weight frame 20 are, for example, about half the overall length L of the weight frame 102, so there is no need to install a frame band 103 in the middle of the vertical frames 21b, 22b. In other words, the overall lengths L1, L2 of each weight frame are short enough that the weight frames will not distort and open. By using weight frames with a short overall length, the construction time required for installing a new counterweight 2 can be shortened.

[0036] Next, the configuration of the connecting projections 31, 32 will be described in more detail with reference to Fig. 3. Fig. 3 is a cross-sectional view taken along line AA in Fig. 2. However, the bolt 34 and the nut 35 are not shown in cross section.

[0037] As shown in Figure 3, the first weight frame 21 and the second weight frame 22 are connected via connecting protrusions 31, 32 that fit together. In this embodiment, the first connecting protrusion 31 of the first weight frame 21 and the second connecting protrusion 32 of the second weight frame 22 form a connecting portion 30 between the two weight frames. The connecting protrusions 31, 32 are arranged to overlap in the front-to-rear direction and have a structure that fits together. The first connecting protrusion 31 is arranged further forward on the weight frame 20 than the second connecting protrusion 32.

[0038] The first connecting projection 31 has a base 31a extending downward from the lower beam 21c of the first weight frame 21, and a hook 31b that protrudes further rearward from the weight frame 20 than the base 31a. The hook 31b is formed on the tip side of the connecting projection 31. Similarly, the second connecting projection 32 has a base 32a extending upward from the upper beam 22a of the second weight frame 22, and a hook 32b that protrudes further forward from the weight frame 20 than the base 32a.

[0039] The connecting protrusions 31, 32 are connected by hooking the hook portions 31b, 32b together. The base sides of the connecting protrusions 31, 32 are formed with recesses that are recessed in the front-rear direction relative to the tip sides, and the protruding hook portions 31b, 32b fit into the recesses. This type of fitting structure allows the connecting protrusions 31, 32 to engage with each other, making it possible to easily connect the weight frames. The fitting structure of the connecting protrusions 31, 32 is not limited to the structure exemplified in FIG. 3.

[0040] The connecting projections 31, 32 are further fixed to each other using a bolt 34 and a nut 35. The connecting projections 31, 32 have through holes 31c, 32c, respectively. When the connecting projections 31, 32 are engaged with each other, the through holes 31c, 32c are aligned in the front-to-rear direction to form a single continuous bolt insertion hole 33. By inserting a bolt 34 into the bolt insertion hole 33 and screwing it with the nut 35, the connecting projections 31, 32 can be fixed more firmly. In this embodiment, the bolt insertion holes 33 are formed in two locations, above and below the connecting projections 31, 32, and one connecting portion 30 is fastened using two bolts 34.

[0041] Because the connecting protrusions 31, 32 protrude from the first weight frame 21 and the second weight frame 22, respectively, it is easy to align the connecting protrusions 31, 32 when connecting the weight frames, and the weight frames can be easily connected. For example, in a structure in which bolt insertion holes are formed in each weight frame and the weight frames are connected using bolts and nuts, it is not easy to align the bolt insertion holes of the weight frames and then pass the bolt through the holes to connect the weight frames. In contrast, the connecting protrusions 31, 32 protruding from each weight frame are highly visible, allowing workers to easily recognize their positions, and therefore aligning the connecting protrusions 31, 32 can be done easily and quickly. Furthermore, if the bolt 34 and nut 35 could be attached while the connecting protrusions 31, 32 are engaged with each other, the workload would be further reduced.

[0042] Furthermore, even if only one of two weight frames to be connected to each other has a connecting protrusion that protrudes toward the other weight frame, the load of the connecting work is greatly reduced compared to when neither weight frame has a connecting protrusion. A specific example is a configuration in which one of two weight frames to be connected to each other has a connecting protrusion and the other weight frame has an insertion hole for the connecting protrusion, and the connecting protrusion is inserted into the insertion hole and fixed to the other weight frame.

[0043] Next, a counterweight 2X, which is another example of an embodiment, will be described with reference to Fig. 4. Fig. 4 is a front view of the counterweight 2X. In the following, the same reference numerals are used for configurations similar to those of the above embodiment, and redundant explanations will be omitted, and differences from the above embodiment will be described in detail.

[0044] As shown in FIG. 4, the counterweight 2X is similar to the counterweight 2 in that it includes multiple weight frames constituting the weight frame 20X, including a first weight frame 21 to which the main rope 3 is fixed and a second weight frame 22X connected below the first weight frame 21. However, the counterweight 2X differs from the counterweight 2 in that it includes a third weight frame 23 connected below the second weight frame 22X. The first weight frame 21 and the second weight frame 22X are connected by two connecting portions 30. On the other hand, the second weight frame 22X and the third weight frame 23 are connected by one connecting portion 40. The connecting portion 40 is located in the center of the width of the weight frame 20X.

[0045] Similar to the first weight frame 21, the second weight frame 22X and the third weight frame 23 have a rectangular frame structure and include upper beams 22a, 23a, vertical beams 22b, 23b, and lower beams 22c, 23c. The second weight frame 22X has one connecting protrusion 41 fixed by welding or the like to the longitudinal center of the lower beam 22c. The connecting protrusion 41 protrudes from the longitudinal center of the lower beam 22c in the opposite direction (downward) from the first weight frame 21. The connecting protrusion 41 functions to connect with the third weight frame 23, which is positioned below the second weight frame 22X, and forms a connecting portion 40.

[0046] The connecting protrusion 41 also functions as a spacer that abuts against the buffer 9 (see FIG. 1) installed on the hoistway floor 7a in the event of an abnormality. In the example shown in FIG. 4, the third weight frame 23 is connected below the second weight frame 22X, and the connecting protrusion 41 functions as a coupler. However, the counterweight 2X is also designed to be used in a configuration in which the second weight frame 22X is positioned at the lowest end. When the second weight frame 22X is positioned at the lowest end, i.e., when the third weight frame 23 is not connected, the connecting protrusion 41 functions as a spacer. By using the connecting protrusion 41 as a spacer, there is no need to provide a separate spacer. The shape, size, etc. of the connecting protrusion 41 are not particularly limited as long as it functions as both a coupler and a spacer. An example of the connecting protrusion 41 is a cylindrical or cylindrical protrusion.

[0047] A connecting structure is provided on the upper beam 23a of the third weight frame 23, which forms a connecting portion 40 together with the connecting protrusion 41 of the second weight frame 22X. The third weight frame 23 may have, as the connecting structure, a connecting protrusion that fits into the connecting protrusion 41, or may have an insertion hole for the connecting protrusion 41. For example, if the connecting protrusion 41 of the third weight frame 23 is a columnar protrusion, the connecting protrusion may be a cylindrical protrusion that houses the connecting protrusion 41, or if the connecting protrusion 41 is a cylindrical protrusion, the connecting protrusion may be a columnar or cylindrical protrusion that can be inserted into the cylinder of the connecting protrusion 41. The connecting protrusion 41 of the second weight frame 22X and the connecting protrusion of the third weight frame 23 may be fixed using fastening members such as bolts and nuts.

[0048] A spacer 2a is provided on the lower beam 23c of the third weight frame 23, fixed by welding or the like to the center in the longitudinal direction. The spacer 2a protrudes toward the buffer 9 (see FIG. 1) of the hoistway floor 7a. The spacer 2a may also function as a connecting protrusion when an additional weight frame is connected below the third weight frame 23.

[0049] As described above, by using the counterweight 2 having the above configuration, it is possible to connect multiple weight frames of a size that does not interfere with the delivery route and construct a weight frame 20 of the same weight as the conventional counterweight 100. Furthermore, since the overall length of each weight frame can be reduced, not only is the ease of delivery to the site improved, but it also eliminates the need to install the frame bands 103 that were required in the middle of the vertical frames of the conventional weight frame 102, allowing for a significant reduction in the construction time for renovation work.

[0050] The above-described embodiment can be modified as appropriate within the scope of the object of the present invention. For example, in the above-described embodiment, the connecting protrusions of the two weight frames that are connected to each other have an interlocking structure (see FIG. 3). However, the connecting portion of the weight frames may not have an interlocking structure as illustrated in FIG. 3, and the connecting protrusions may be fixed to each other using fastening members such as bolts and nuts. Furthermore, the engaging portion of the first connecting protrusion 31 may have a dovetail shape in cross section, and the engaging portion of the second connecting protrusion 32 may have a dovetail shape in cross section that engages with the dovetail shape in cross section of the first connecting protrusion 31. [Explanation of symbols]

[0051] 1 car, 1a spacer, 2, 2X counterweight, 2a spacer, 3 main rope, 4 machine room, 5 hoist, 6 deflector, 7 elevator shaft, 7a elevator shaft floor, 8, 9 buffer, 10 weight piece, 20, 20X weight frame, 21 first weight frame, 21a, 22a, 23a upper beam, 21b, 22b, 23b vertical frame, 21c, 22c, 23c lower beam, 22, 22X second weight frame, 23 third weight frame, 24 through hole, 30 connecting portion, 31 first connecting projection, 31a, 32a base, 31b, 32b hook portion, 31c, 32c through hole, 32 second connecting projection, 33 bolt insertion hole, 34 bolt, 35 Nut, 36 rope socket, 37 fixed rod, 38 nut, 40 connecting part, 41 connecting projection, 100 counterweight, 101 weight piece, 102 weight frame, 103 frame band

Claims

1. An elevator counterweight comprising a plurality of weight pieces and a weight frame for holding the plurality of loaded weight pieces, The weight frame is a first weight frame to which a main rope connected to the car is fixed; a second weight frame disposed below the first weight frame; Including, An elevator counterweight, wherein at least one of the first weight frame and the second weight frame has a connecting protrusion protruding toward the other of the first weight frame and the second weight frame, and is detachably connected to the other of the first weight frame and the second weight frame via the connecting protrusion.

2. 2. The elevator counterweight according to claim 1, wherein the first weight frame and the second weight frame each have the connecting protrusions and are connected to each other via the connecting protrusions.

3. 3. The elevator counterweight according to claim 2, wherein the connecting protrusions of the first weight frame and the connecting protrusions of the second weight frame are configured to fit together.

4. the second weight frame has a second connecting protrusion protruding in a direction opposite to the first weight frame, 4. The elevator counterweight according to claim 1, wherein the second connecting protrusion has a connecting function with a third weight frame disposed below the second weight frame, and also functions as a spacer that comes into contact with a buffer installed on the elevator shaft floor in the event of an abnormality.

Images