Elevator counterweight device

Abstract

To provide a counterweight device for an elevator capable of adjusting the clearance between a guide rail and a stopper member. [Solution] The elevator counterweight device includes a frame body, a guide member, and a stopper member. The frame body has a pair of left and right vertical beams, and a counterweight is housed inside. The guide members are provided at the upper and lower ends of the vertical beams and are guided along guide rails installed in the hoistway. The stopper member is provided between the upper and lower ends of the vertical beams and restricts forward / backward and left / right movement of the vertical beams relative to the guide rails. The stopper member has a base portion fixed to the vertical beams and an adjustment plate that is adjustable in the gap between the guide rails and the stopper member and is fixed to the base portion with the gap adjusted.

Description

[Technical Field]

[0001] FIELD OF THE INVENTION An embodiment of the present invention relates to a counterweight device for an elevator. [Background technology]

[0002] Elevator counterweights have a stopper at the vertical center of the counterweight frame to prevent the counterweight from falling off the guide rail even if the guide rail bends during an earthquake. It is desirable for the stopper to have an appropriate clearance between itself and the guide rail so that it passes near the blade surface of the guide rail.

[0003] However, the stopper must be strong so that it will not be destroyed by the impact of an earthquake. Because it must be strong, the stopper's structure makes it difficult to adjust the clearance between it and the guide rail. Because it is difficult to adjust the clearance, there are cases where the clearance is insufficient due to the influence of factors such as the load balance when installing the counterweight. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 61-105377 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the embodiment is to provide an elevator counterweight device that can adjust the clearance between a guide rail and a stopper member. [Means for solving the problem]

[0006] An elevator counterweight device according to an embodiment includes a frame body, a guide member, and a stopper member. The frame body has a pair of left and right vertical beams, and a counterweight is housed inside. The guide members are provided at the upper and lower ends of the vertical beams and are guided along guide rails installed in the hoistway. The stopper member is provided between the upper and lower ends of the vertical beams and restricts forward / backward and left / right movement of the frame body relative to the guide rails. The stopper member has a base portion fixed to the vertical beams and an adjustment plate that is adjustable in the gap between the guide rails and the stopper member and is fixed to the base portion with the gap adjusted. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a front view showing a counterweight device according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1, showing the counterweight device according to the first embodiment. [Figure 3] FIG. 3 is a perspective view showing the counterweight device according to the first embodiment. [Figure 4] FIG. 4 is a front view showing an example of operation of the counterweight device according to the first embodiment. [Figure 5] FIG. 5 is a perspective view showing a counterweight device according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments. In addition, in the drawings referred to in the embodiments, identical parts or parts having similar functions are designated by the same or similar reference numerals, and repeated description thereof will be omitted.

[0009] (First embodiment) Generally, a hoist elevator is configured such that a car and a counterweight device 1 are suspended from both ends of a main rope 3 wound around a hoist. Driven by the hoist, the counterweight device 1 moves up and down along left and right guide rails installed in the hoistway while balancing the weight of the car. As shown in FIG. 1, the counterweight device 1 includes a frame 2, a counterweight body 4, a guide member 5, and a stopper member 8. In the following description, the Z direction in FIG. 1 is defined as upward, and the direction opposite the Z direction is defined as downward. The X direction in FIG. 1 is defined as rightward, and the direction opposite the X direction is defined as leftward. The Y direction in FIG. 1 is defined as backward, and the direction opposite the Y direction is defined as forward.

[0010] The frame 2 is a frame-shaped structure in which a weight 4 is housed. The frame 2 has an upper beam 2a, a lower beam 2b, and a pair of left and right vertical beams 2c, 2c. The pair of left and right vertical beams 2c, 2c are arranged at a distance from each other in the hoistway. Each of the pair of left and right vertical beams 2c, 2c extends in the vertical direction. The upper beam 2a is arranged to connect the upper ends of the pair of left and right vertical beams 2c, 2c. That is, the upper beam 2a extends in the horizontal direction from the upper end of one vertical beam 2c to the upper end of the other vertical beam 2c. The horizontal direction is also called the rail gauge direction. The lower beam 2b is arranged to connect the lower ends of the pair of left and right vertical beams 2c, 2c. That is, the lower beam 2b extends in the horizontal direction from the lower end of one vertical beam 2c to the lower end of the other vertical beam 2c. The weight 4 is housed inside the frame 2 so as to be loaded on the lower beam 2b. That is, the weights 4 have a block plate shape, and a plurality of weights 4 are stacked upward from the lower beam 2b.

[0011] The guide members 5 are members that guide the elevation of the counterweight device 1 along the guide rails 6. A total of four guide members 5 are provided at the upper and lower ends of each of the pair of left and right longitudinal beams 2c, 2c. The guide members 5 are also called guide shoes. The guide members 5 are guided along left and right guide rails 6 installed in the hoistway. The guide rails 6 are fixed to the inner wall of the hoistway by a plurality of brackets 7 that are provided on the guide rails 6 at intervals in the vertical direction.

[0012] The anti-slip members 8 are members that prevent the counterweight device 1 from coming off the guide rail 6 when an impact such as an earthquake occurs. A total of two anti-slip members 8 are provided between the upper and lower ends of each of the pair of left and right longitudinal beams 2c. In the example shown in FIG. 1, the anti-slip members 8 are provided at intermediate positions between the upper and lower ends of each of the pair of left and right longitudinal beams 2c. The anti-slip members 8 restrict movement of the vertical beams 2c relative to the guide rail 6 in the front-rear and left-right directions.

[0013] 2 and 3, the anti-detachment member 8 includes a base portion 81 and an adjustment plate 82. Of the pair of left and right vertical beams 2c, 2c, the anti-detachment member 8 provided on the right vertical beam 2c is shown in Fig. 2 and 3. The anti-detachment member 8 provided on the left vertical beam 2c has a shape that is mirror-symmetrical with respect to the YZ plane with respect to the anti-detachment member 8 of Fig. 2 provided on the right vertical beam 2c.

[0014] The base portion 81 is fixed to the vertical beam 2c. In the example shown in Figs. 2 and 3, the base portion 81 is fastened to the vertical beam 2c by first fastening members 84. The first fastening members 84 have a plurality of bolts 84a and a plurality of nuts 84b corresponding to each of the bolts 84a. More specifically, in the example shown in Fig. 3, the base portion 81 has a horizontal base plate 811 and side walls 812 extending upward from both ends of the base plate 811 in the front-rear direction. The base portion 81 is fastened to the vertical beam 2c by the first fastening members 84 arranged on the side walls 812.

[0015] The base portion 81 is provided with a first recess 81a extending from the guide rail 6 side toward the vertical beam 2c side. In the example shown in FIGS. 2 and 3, the first recess 81a is provided in a base plate 811 of the base portion 81 so as to have widths in the left-right and front-rear directions. Specifically, in the example shown in FIGS. 2 and 3, the first recess 81a is provided by partially cutting out a rectangular portion of the right end portion of the base plate 811. The guide rail 6 is positioned in the first recess 81a with a gap between it and the base portion 81 in the front-rear direction and a gap between it and the base portion 81 in the left-right direction. In the example shown in FIG. 2, the blade portion 61 of the guide rail 6 is positioned in the first recess 81a.

[0016] The adjustment plate 82 is a horizontal plate-like member that can adjust the distance between the guide rail 6 and the anti-detachment member 8. The adjustment plate 82 is fixed to the base portion 81 in a state in which the distance between the guide rail 6 and the anti-detachment member 8 is adjusted. Specifically, as shown in FIG. 3, the anti-detachment member 8 further includes second fastening members 83 that fasten the adjustment plate 82 to the base portion 81. The second fastening members 83 are an example of a fixing member. The second fastening members 83 have a plurality of bolts 83a and a plurality of nuts 83b (see FIG. 4) corresponding to each of the bolts 83a. The adjustment plate 82 is fastened to the base plate 811 by the second fastening members 83. More specifically, the bolts 83a of the second fastening members 83 penetrate the adjustment plate 82 and the base plate 811 via bolt holes 82b formed in the adjustment plate 82 and bolt holes (not shown) formed in the base plate 811. The nuts 83b of the second fastening members 83 fasten the bolts 83a of the second fastening members 83 on the lower surface side of the base plate 811, thereby fastening the adjustment plate 82 to the base plate 811.

[0017] The adjusting plate 82 is provided with a second recess 82a extending from the guide rail 6 side toward the vertical beam 2c side. The second recess 82a is provided in the adjusting plate 82 so as to be positioned above (i.e., overlapping with) the first recess 81a of the base portion 81. In other words, the second recess 82a is continuous with the first recess 81a in the up-down direction. In the example shown in FIGS. 2 and 3, the second recess 82a is provided in the adjusting plate 82 so as to have widths in the left-right and front-rear directions.

[0018] 2 and 3, the second recess 82a is provided by partially cutting out a rectangular portion of the right end of the adjustment plate 82. The guide rail 6 is positioned in the second recess 82a with a gap in the front-to-rear direction and a gap in the left-to-right direction between the second recess 82a and the adjustment plate 82. The guide rail 6 is positioned in both the first recess 81a and the second recess 82a at the same time. The second recess 82a has smaller dimensions in the front-to-rear direction and the left-to-right direction than the first recess 81a. More specifically, as shown in FIG. 2, when the first recess 81a and the second recess 82a are projected onto an XY plane perpendicular to the up-down direction, the second recess 82a is positioned inside the first recess 81a.

[0019] The adjustment plate 82 can adjust at least the left-right distance between the guide rail 6 and the anti-detachment member 8. In the example shown in FIG. 2, the adjustment plate 82 can adjust the left-right distance d1 between the left end of the blade portion 61 of the guide rail 6 and the left end (i.e., the left edge) of the second recess 82a of the adjustment plate 82. Specifically, in the example shown in FIG. 2, the bolt hole 82b of the adjustment plate 82 has an elongated hole shape extending in the left-right direction. By having an elongated hole shape extending in the left-right direction, the bolt hole 82b can allow the adjustment plate 82 to move in the left-right direction when the bolt 83a of the second fastening member 83 is inserted in a loosened state. Because the adjustment plate 82 is allowed to move in the left-right direction, the position at which the adjustment plate 82 is fastened by the second fastening member 83 can be moved in the left-right direction. This allows the left-right distance between the guide rail 6 and the anti-detachment member 8.

[0020] Instead of having an elongated hole shape, bolt hole 82b may be configured to have an inner diameter that is significantly larger than the outer diameter of bolt 83a of second fastening member 83. In other words, bolt hole 82b may be a clearance hole. Even in this case, bolt hole 82b can allow movement of adjustment plate 82 in the left-right direction, so that the left-right distance between guide rail 6 and anti-detachment member 8 can be adjusted.

[0021] The adjusting plate 82 may further be capable of adjusting the distance in the front-rear direction between the guide rail 6 and the anti-detachment member 8. That is, the adjusting plate 82 may be capable of adjusting the distance d2 in the front-rear direction between the front end of the blade portion 61 of the guide rail 6 and the front end (i.e., the front edge) of the second recess 82a of the adjusting plate 82, and the distance d3 in the front-rear direction between the rear end of the blade portion 61 and the rear end (i.e., the rear edge) of the second recess 82a. For example, the bolt hole of the base plate 811 may have an elongated hole shape extending in the front-rear direction. The bolt hole of the base plate 811 extending in the front-rear direction corresponds to a bolt hole having a shape obtained by rotating the bolt hole 82b of the adjusting plate 82 shown in FIG. 2 by 90 degrees. By having an elongated hole shape extending in the front-rear direction, the bolt hole of the base plate 811 can allow movement of the adjusting plate 82 in the front-rear direction when the bolt 83a of the second fastening member 83 is inserted in a loosened state. Since the adjustment plate 82 is allowed to move in the front-rear direction, the position at which the adjustment plate 82 is fastened by the second fastening member 83 can be moved in the front-rear direction. This makes it possible to adjust the distance between the guide rail 6 and the anti-detachment member 8 in the front-rear direction.

[0022] Instead of having an elongated hole shape, the bolt hole of the base plate 811 may be configured to have an inner diameter that is significantly larger than the outer diameter of the bolt 83a of the second fastening member 83. In other words, the bolt hole of the base plate 811 may be a clear hole. Even in this case, the bolt hole of the base plate 811 can allow movement of the adjustment plate 82 in the front-to-rear direction, so that the distance between the guide rail 6 and the anti-detachment member 8 in the front-to-rear direction can be adjusted.

[0023] The left-right dimension of the first recess 81a is such that even if an impact causes the adjustment plate 82 to come off and the guide rail 6 to bend, there will be an overlap of 10 mm or more with the guide rail 6 (i.e., the range of overlap in the front-to-rear direction). This dimension satisfies the content of Ministry of Land, Infrastructure, Transport and Tourism Notification No. 1494 of 2008. For example, as shown in FIG. 4, if an impact causes the left guide rail 6 to bend in the X direction (to the right) and this bending pushes the left anti-detachment member 8 out in the X direction, the first recess 81a of the left anti-detachment member 8 after being pushed out will have an overlap of 10 mm or more with the left guide rail 6.

[0024] 2 and 3, the second fastening member 83 fixes the adjusting plate 82 at a fixed position that is spaced apart in the left-right direction from the left-right end of the second recess 82a (the left end in FIGS. 2 and 3). More specifically, in the example shown in FIG. 3, the adjusting plate 82 is fixed to the base plate 811 by two bolts 83a of the second fastening member 83 that are arranged at fixed positions spaced apart in the front-rear direction and by nuts 83b corresponding to each of the bolts 83a.

[0025] In the counterweight device 1 having the above configuration, when the counterweight device 1 is installed, the clearance between the guide rail 6 and the anti-detachment member 8 is adjusted by the adjustment plate 82 in accordance with the inclination of the counterweight device 1 suspended by the main ropes 3. For example, with the bolt 83a of the second fastening member 83 inserted into the bolt hole 82b of the adjustment plate 82 and the bolt hole of the base plate 811 loosened, the adjustment plate 82 is moved left and right to adjust the left-right distance between the guide rail 6 and the anti-detachment member 8. Furthermore, with the bolt 83a of the second fastening member 83 loosened, the adjustment plate 82 is moved forward and backward to adjust the front-rear distance between the guide rail 6 and the anti-detachment member 8.

[0026] Then, at the position after the gap adjustment, the bolt 83a of the second fastening member 83 is tightened with the nut 83b of the second fastening member 83 (see FIG. 4), thereby fixing the adjustment plate 82 to the base plate 811. This determines the clearance between the guide rail 6 and the anti-detachment member 8. If roller guides (not shown) that have the function of adjusting the inclination of the counterweight device 1 are provided above and below the frame 2, the clearance between the guide rail 6 and the anti-detachment member 8 can be adjusted to some extent by adjusting the inclination using the roller guides. In this case, adjustment of the clearance using the adjustment plate 82 may be performed when the clearance cannot be completely adjusted by adjusting the inclination using the roller guides.

[0027] As described above, according to the first embodiment, the anti-slip member 8 has a base portion 81 fixed to the vertical beam 2c, and an adjustment plate 82 that is capable of adjusting the gap between the guide rail 6 and the anti-slip member 8 and is fixed to the base portion 81 with the gap adjusted.

[0028] This allows the clearance between the guide rail 6 and the retaining member 8 to be adjusted.

[0029] Furthermore, according to the first embodiment, the adjustment plate 82 is capable of adjusting at least the distance between the guide rail 6 and the retaining member 8 in the left-right direction.

[0030] This allows the clearance between the guide rail 6 and the stopper member 8 in the left-right direction to be adjusted.

[0031] Furthermore, according to the first embodiment, the adjustment plate 82 can also adjust the distance between the guide rail 6 and the stopper member 8 in the front-rear direction.

[0032] This also makes it possible to adjust the clearance between the guide rail 6 and the stopper member 8 in the front-rear direction.

[0033] Furthermore, according to the first embodiment, the second recess 82a of the adjustment plate 82 has smaller dimensions in the front-rear and left-right directions than the first recess 81a of the base portion 81.

[0034] This allows the base portion 81 to have a large clearance with respect to the guide rail 6, and the adjustment plate 82 can be adjusted to have a specified clearance.

[0035] Furthermore, according to the first embodiment, the left-right dimension of the first recess 81a is such that even if the adjustment plate 82 comes off due to an impact and the guide rail 6 bends, there is an overlap of 10 mm or more between the first recess 81a and the guide rail 6.

[0036] As a result, even if the guide rail 6 is bent, the necessary clearance can be secured between the guide rail 6 and the stopper member 8.

[0037] Furthermore, according to the first embodiment, the retaining member 8 includes the second fastening member 83 that fixes the adjusting plate 82 to the base portion 81.

[0038] This makes it possible to ensure a clearance between the guide rail 6 and the retaining member 8 with a simple configuration.

[0039] Furthermore, according to the first embodiment, the second fastening member 83 fixes the adjusting plate 82 at a fixing position that is spaced apart in the left-right direction from the left and right ends of the second recess 82a.

[0040] This improves the strength with which the adjusting plate 82 is fixed against impacts in the left-right direction. Also, the area of ​​the adjusting plate 82 can be reduced, thereby reducing costs.

[0041] Furthermore, according to the first embodiment, the retaining member 8 is provided at a midpoint between the upper and lower ends of the vertical beam 2c.

[0042] This makes it possible to appropriately prevent the counterweight device 1 from falling off the guide rail 6.

[0043] (Second embodiment) In the second embodiment, the fixing position of the adjusting plate 82 by the second fastening member 83 differs from that of the first embodiment. Specifically, as shown in Fig. 5, in the second embodiment, the second fastening member 83 fixes the adjusting plate 82 at a fixing position that is spaced apart in the front-rear direction from the front-rear end of the second recess 82a.

[0044] As a result, the bolt holes 82b (see FIG. 2) of the adjustment plate 82 can be formed longer in the left-right direction than in the first embodiment, and the amount of left-right adjustment of the adjustment plate 82 can be increased compared to the first embodiment. Also, since the second fastening member 83 can be provided near the outer left-right end of the adjustment plate 82, the rotation angle per rotation of a tool (e.g., a wrench) that fastens the second fastening member 83 by rotating it can be increased. This improves the ease of adjusting the clearance.

[0045] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, as well as within the scope of the invention described in the claims and their equivalents. [Explanation of symbols]

[0046] 1 balancing weight device, 2 frame body, 2c vertical frame, 5 guide member, 6 guide rail, 8 stopper member, 81 base portion, 82 adjustment plate

Claims

1. a frame body having a pair of left and right vertical beams and containing a weight therein; guide members provided at the upper and lower ends of the longitudinal beams and guided along guide rails installed in the elevator shaft; a stopper member provided between the upper end and the lower end of the vertical beam and restricting movement of the frame body in the front-rear and left-right directions relative to the guide rail; the anti-removal member has a base portion fixed to the vertical beam, and an adjustment plate that is capable of adjusting the gap between the guide rail and the anti-removal member and is fixed to the base portion with the gap adjusted, the base portion is provided with a first recess in which the guide rail is positioned with a gap between the base portion and the first recess in the front-rear direction and a gap between the base portion and the guide rail in the left-right direction; the adjustment plate is provided with a second recess in which the guide rail is positioned with a gap between the adjustment plate and the second recess in the front-rear direction and a gap between the adjustment plate and the guide rail in the left-right direction; The second recess has dimensions smaller than those of the first recess in the front-rear direction and the left-right direction, An elevator counterweight device, wherein when the first recess and the second recess are projected onto a plane perpendicular to the up-down direction, the second recess is located inside the first recess.

2. 2. The elevator counterweight device according to claim 1, wherein the adjustment plate is capable of adjusting at least the left-right distance between the guide rail and the stopper member.

3. 3. The elevator counterweight device according to claim 2, wherein the adjustment plate is further capable of adjusting a distance between the guide rail and the stopper member in the front-rear direction.

4. 2. The elevator counterweight device according to claim 1, wherein the left-right dimension of the first recess is such that an overlap of 10 mm or more is maintained between the first recess and the guide rail even if the adjustment plate comes off due to an impact and the guide rail is bent.

5. The elevator counterweight device according to claim 1 , wherein the retaining member further comprises a fixing member that fixes the adjusting plate to the base portion.

6. The elevator counterweight device according to claim 5 , wherein the fixing member fixes the adjusting plate at a fixing position spaced apart in the left-right direction from the left and right ends of the second recess.

7. The elevator counterweight device according to claim 5 , wherein the fixing member fixes the adjusting plate at a fixing position spaced apart from the front-rear end of the second recess in the front-rear direction.

8. 8. The elevator counterweight device according to claim 1, wherein the stopper member is provided at a midpoint between an upper end and a lower end of the longitudinal beam.

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