Rotation stopper of elevator rope shackle

Abstract

To provide a technique of a rope shackle rotation stopper applicable to a wide variety of rope shackles.SOLUTION: A rotation stopper is applied to a rope shackle configured so that a split pin is inserted into a split pin hole provided at an end. Typically, the rotation stopper comprises: a rotation prevention plate with a long hole extending in a longitudinal direction; and multiple washer members with a washer hole with a diameter smaller than a head of the split pin. In each of the two among multiple rope shackles, the rotation stopper is fixed to the rope shackle with each split pin in a state where the washer hole of the washer member, the long hole of the rotation prevention plate, and the split pin hole are stacked in this order.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to elevator rope shackle anti-rotation devices. [Background technology]

[0002] Patent Document 1 discloses a technology related to an anti-rotation structure for elevator shackle rods. The anti-rotation structure of this technology uses a wire inserted into the gap of the socket of the shackle rod to prevent the rotation of each shackle rod relative to the locking member by utilizing the bending rigidity of the wire. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-188315 A Summary of the Invention [Problem to be solved by the invention]

[0004] There are elevator rope shackles that have no gap in the socket, in addition to those with a gap in the socket as in Patent Document 1. The rotation prevention structure described in Patent Document 1 has a problem in that the rope shackles that can be attached are limited to those with a gap in the socket.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide technology for a rope shackle anti-rotation device that can be applied to a wide variety of rope shackles. [Means for solving the problem]

[0006] The rope shackle anti-rotation device of the present disclosure is applied to a plurality of rope shackles that respectively fasten the ends of a plurality of ropes that suspend an elevator car and a counterweight. The rope shackles are configured so that a split pin is attached to a split pin hole provided at the end. The anti-rotation device includes an anti-rotation plate having a long hole extending in the longitudinal direction, and a plurality of washer members having washer holes with a diameter smaller than that of the head of the split pin, and in each of two of the plurality of rope shackles, the anti-rotation device is configured to be fixed by the respective split pins in a state in which the washer hole of the washer member, the long hole of the anti-rotation plate, and the split pin hole are stacked in this order. Effect of the Invention

[0007] The elevator rope shackle anti-rotation device of the present disclosure is attached to the ends of two rope shackles with a split pin, so there are no restrictions on the shape of the rope shackle that can be attached. This allows it to be attached to a wide variety of rope shackles, making it possible to provide a technology for a highly versatile and easy-to-use anti-rotation device. [Brief description of the drawings]

[0008] [Figure 1] 1 is a diagram showing an example of an elevator to which a rotation stopper according to an embodiment is applied; [Diagram 2] This is a view of the elevator from the AA direction in Figure 1. [Diagram 3] 4A to 4C are diagrams for explaining a configuration of the anti-rotation device according to the embodiment; [Figure 4] 1 is a diagram showing an example of how the anti-rotation device of the embodiment is attached to an elevator. FIG. [Diagram 5] 5 is a view of the anti-rotation device attached between the rope shackles 30a and 30b, as viewed from the C direction in FIG. 4. FIG. [Figure 6] FIG. 13 is a diagram showing a first modified example of the anti-rotation device. [Figure 7] FIG. 13 is a diagram showing a second modified example of the anti-rotation device. [Figure 8]13A and 13B are diagrams illustrating a first modified example of a washer member. [Figure 9] FIG. 13 is a diagram showing a second modified example of a washer member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment will be described with reference to the drawings. In addition, elements common to the various drawings are given the same reference numerals, and duplicated explanations will be omitted.

[0010] Embodiment 1. Configuration of the elevator according to the embodiment FIG. 1 is a diagram showing an example of an elevator to which a rotation stopper according to an embodiment is applied. The elevator includes a car 1 and a counterweight 2. The car 1 has a plurality of panel members connected to each other to form an internal space. The car 1 moves up and down in a hoistway 3. The counterweight 2 moves up and down on the rear side of the car 1 in the hoistway 3. The car 1 and the counterweight 2 are suspended in the hoistway 3 by main ropes 4.

[0011] The main rope 4 is wound around a drive sheave 6 of a hoist 5. When the drive sheave 6 rotates, the main rope 4 moves in a direction corresponding to the direction in which the drive sheave 6 rotates. The car 1 rises or falls depending on the direction in which the main rope 4 moves. The movement of the car 1 is guided by a guide rail 9.

[0012] Fig. 2 is a view of the elevator viewed from the direction AA in Fig. 1. The guide rails 9 are provided in a straight line in the vertical direction. The guide rails 9 are arranged from the pit 3a of the hoistway 3 to the top of the hoistway 3. The pit 3a is a space formed in the hoistway 3 below the landing 10 on the lowest floor. The car 1 is arranged between the two guide rails 9.

[0013] The counterweight 2 includes a rectangular frame 20 and a weight piece 21 disposed within the rectangular frame 20. The counterweight 2 moves in a direction opposite to the direction in which the car 1 moves in the elevator 3 on the rear side of the car 1. The movement of the counterweight 2 is guided by a guide rail 11.

[0014] The guide rails 11 are provided in a straight line in the vertical direction. The guide rails 11 are arranged from the pit 3a of the hoistway 3 to the top of the hoistway 3. The counterweight 2 is arranged between the two guide rails 11.

[0015] In this way, the car 1 and the counterweight 2 are suspended by the main ropes 4 in the shape of a bucket that rises and falls in opposite directions within the hoistway 3. That is, the main ropes 4 suspend the car 1 and the counterweight 2 in the hoistway 3 using a 1:1 roping system. The car 1 and the counterweight 2 are suspended by a plurality of main ropes 4. In the elevator device of this embodiment, six main ropes 4 are used.

[0016] One end of the main rope 4 is connected to the cage frame of the cage 1 via a rope shackle. As shown in Fig. 2, the other end of the main rope 4 is connected to the counterweight 2 via a rope shackle 30. The rope shackle 30 has a structure in which a rope fixing part 32 and a rod 34 are connected. One end of the main rope 4 is fixed and connected to the rope fixing part 32.

[0017] The upper beam 20a of the rectangular frame 20 of the counterweight 2 is provided with a through hole 20b for fixing the rope shackle 30. A rod 34 is inserted into the through hole 20b from above, and an adjustment nut 36 and a fixing nut 38 are fastened to the lower side of the upper beam 20a. The adjustment nut 36 is for adjusting the tension of the main rope 4. The tension of the main rope 4 increases when the adjustment nut 36 is tightened, and decreases when it is loosened. The fixing nut 38 is a nut for preventing the adjustment nut 36 from rotating.

[0018] The tip of the rod 34 is provided with a split pin hole 34a for attaching a split pin 39. The split pin 39 is for preventing the adjustment nut 36 and the fixing nut 38 from falling off. The nominal diameter of the split pin 39 here is, for example, 5 mm.

[0019] 2. Configuration of the anti-rotation device according to the embodiment The tension of the main ropes 4 is adjusted periodically. The worker adjusts the tension of the main ropes 4 to a specified range by loosening the fixing nuts 38 corresponding to each main rope 4 and then turning the adjustment nuts 36. Here, when the car 1 is repeatedly raised and lowered, the main ropes 4 may be twisted. In this case, when the fixing nuts 38 are loosened during tension adjustment work, the main ropes 4 may rotate around the axis, causing the tension to shift. The rotation stopper of this embodiment is attached by the respective split pins 39 so as to span between the tips of the rods 34 of a pair of rope shackles 30 in order to prevent the main ropes 4 from rotating around the axis during tension adjustment work. The configuration of the rotation stopper of this embodiment will be described in detail below.

[0020] FIG. 3 is a diagram for explaining the configuration of the anti-rotation device of the embodiment. As shown in FIG. 3, the anti-rotation device 100 includes an anti-rotation plate 40 and two washer members 50. The anti-rotation plate 40 is a rectangular metal plate having a size of, for example, 160 mm×30 mm×1.5 mm. At both ends in the longitudinal direction of the anti-rotation plate 40, first long holes 421, 441, 461 and second long holes 422, 442, 462 are provided along the longitudinal direction and aligned in the lateral direction. The first long hole 421 and the second long hole 422 have a width dimension corresponding to a split pin with a nominal diameter of 4 mm. The first long hole 441 and the second long hole 442 have a width dimension corresponding to a split pin with a nominal diameter of 5 mm. The first long hole 461 and the second long hole 462 have a width dimension corresponding to a split pin with a nominal diameter of 6 mm.

[0021] The washer member 50 is a circular metal washer, and has, for example, an outer dimension equivalent to the dimension in the short direction of the anti-rotation plate 40. The washer member 50 has three washer holes 52, 54, 56 of different diameters arranged side by side. The washer hole 52 has a hole diameter corresponding to a split pin with a nominal diameter of 4 mm. The washer hole 54 has a hole diameter corresponding to a split pin with a nominal diameter of 5 mm. The washer hole 56 has a hole diameter corresponding to a split pin with a nominal diameter of 6 mm. In other words, the washer holes 52, 54, 56 are smaller in diameter than the heads of the split pins with nominal diameters of 4 mm, 5 mm, and 6 mm.

[0022] Fig. 4 is a diagram showing an example of installation of the anti-rotation device of the embodiment in an elevator. Fig. 4 is a diagram showing a state in which four sets of anti-rotation devices 100 are installed on the rope shackle 30 of the elevator in Fig. 2, as viewed from cross section BB. Fig. 5 is a diagram showing the anti-rotation device 100 installed between the rope shackles 30a and 30b, as viewed from the direction C in Fig. 4.

[0023] In the example shown in Fig. 4, the rotation prevention plate 40 of the anti-rotation device 100 is attached between the rope shackles 30a and 30b, between the rope shackles 30b and 30c, between the rope shackles 30d and 30e, and between the rope shackles 30e and 30f. An existing split pin 39 is used for attachment. For example, when the nominal diameter of the split pin 39 is 5 mm, the first long hole 441 and the second long hole 442 of the rotation prevention plate 40 are used. However, there is a risk that the split pin 39 will come out of the first long hole 441 or the second long hole 442 depending on the rotation position. Therefore, a washer member 50 is sandwiched between the rotation prevention plate 40 and the end side of the split pin 39. For example, when the nominal diameter of the split pin 39 is 5 mm, the anti-rotation device 100 is fixed by the split pin 39 in a state where the washer hole 54 of the washer member 50, the first long hole 441 or the second long hole 442 of the anti-rotation plate 40, and the split pin hole 34a of the rope shackle 30 are stacked in that order.

[0024] 3. Function and effect of the anti-rotation device according to the embodiment According to the anti-rotation device 100 configured as above, the following actions and effects can be obtained.

[0025] The anti-rotation device 100 has a structure in which the ends of the rods 34 of a pair of rope shackles 30 are connected to each other by a common anti-rotation plate 40, and therefore can prevent rotation of each of the pair of rope shackles 30. In addition, the anti-rotation device 100 is attached using an existing split pin 39 attached to the rope shackle 30, so no special configuration is required for attachment.

[0026] The anti-rotation device 100 has holes formed in the anti-rotation plate 40 and the washer member 50 that correspond to split pins of three different nominal diameters. With this configuration, the anti-rotation device 100 can accommodate split pins of multiple nominal diameters, improving the versatility of the anti-rotation device 100.

[0027] The anti-rotation plate 40 is provided with a first long hole 421 and a second long hole 422, a first long hole 441 and a second long hole 442, and a first long hole 461 and a second long hole 462, which are arranged along the longitudinal direction. With this configuration, even if a difference occurs in the amount of protrusion of the rods 34 of the pair of rope shackles 30 due to tension adjustment of the main ropes 4, the connection by the anti-rotation plate 40 can be maintained.

[0028] The anti-rotation device 100 attached to the tip of the rod 34 of the rope shackle 30 does not get in the way when the counterweight 2 is raised or lowered. Therefore, the anti-rotation device 100 can be used not only in an embodiment where it is attached when adjusting the tension of the main rope 4, but also in an embodiment where it is always attached.

[0029] 4. Variations The anti-rotation device 100 according to this embodiment may be modified as follows.

[0030] 4-1. Anti-rotation device 100 There is no limit to the number of anti-rotation plates 40 and the number of washer members 50 used in the anti-rotation device 100. That is, for example, when the number of rope shackles 30 used is three or four, two anti-rotation plates 40 and four washer members 50 are used, and when the number of rope shackles 30 used is six, four anti-rotation plates 40 and eight washer members 50 are used. This makes it possible to prevent the rotation of all of the multiple rope shackles 30 equipped in the elevator.

[0031] 4-2. Rotation prevention plate 40 Fig. 6 is a diagram showing a first modified example of the anti-rotation device. In the first modified example shown in this figure, continuous long holes 42, 44, 46 are formed in the longitudinal direction instead of the first and second long holes 421, 422, the first and second long holes 441, 442, and the first and second long holes 461, 462 shown in Fig. 3. This configuration improves the degree of freedom for the spacing between the pair of rope shackles 30 to be attached.

[0032] There is no limit to the number of types of long holes formed in the rotation prevention plate 40. That is, the rotation prevention plate 40 may be formed with only one type of long holes among the first long hole 421 and the second long hole 422, the first long hole 441 and the second long hole 442, and the first long hole 461 and the second long hole 462, or may be formed with long holes corresponding to four or more types of width dimensions. FIG. 7 is a diagram showing a second modification of the rotation stopper. In the second modification shown in this figure, the rotation prevention plate 40 in which only the first long hole 441 and the second long hole 442 are formed is illustrated. Furthermore, as in the first modification, the first long hole 441 and the second long hole 442 of the rotation prevention plate 40 may be configured as a continuous long hole 44 in the longitudinal direction.

[0033] 4-3. Washer part 50 There is no limit to the number of types of washer holes formed in the washer member 50. That is, the washer member 50 may be formed with only one type of washer hole corresponding to the nominal diameter of the split pin to be used, or may be formed with washer holes corresponding to four or more types of nominal diameters. FIG. 8 is a diagram showing a first modified example of a washer member. In the first modified example shown in this figure, a single washer hole 54 is formed. With such a configuration, it is possible to use, for example, a general-purpose washer.

[0034] There is no limitation on the shape of the washer member 50, i.e., the outer shape of the washer member 50 does not have to be circular. Fig. 9 is a diagram showing a second modified example of the washer member. As shown in Fig. 9, there is no limitation on the arrangement of the washer holes 52, 54, 56.

[0035] 5.Other Although the preferred embodiments have been described in detail above, the present disclosure is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the claims.

[0036] Various aspects of the present disclosure are summarized below as appendices.

[0037] (Appendix 1) A device for preventing the rotation of a plurality of rope shackles that respectively fasten the ends of a plurality of ropes that suspend an elevator car and a counterweight, The rope shackle is configured so that a split pin is attached to a split pin hole provided at the end, The anti-rotation tool is A rotation prevention plate having a long hole extending in the longitudinal direction; a plurality of washer members each having a washer hole with a diameter smaller than that of the head of the split pin; In each of two of the plurality of rope shackles, The anti-rotation device is fixed by the split pins in a state where the washer hole of the washer member, the long hole of the anti-rotation plate, and the split pin hole are overlapped in this order. A rotation preventing device for a rope shackle configured as follows. (Appendix 2) The long hole is A first long hole provided on one end side of the rotation prevention plate; a second slot provided on the other end of the rotation prevention plate and separated from the first slot; 2. A rope shackle stopper as described in appendix 1 including (Appendix 3) The slot includes a plurality of slots having different widths. A device for preventing the rotation of a rope shackle as described in Appendix 1 or Appendix 2. (Appendix 4) The washer hole includes a plurality of holes having different diameters. A rope shackle anti-rotation device according to any one of appendices 1 to 3. [Explanation of symbols]

[0038] 3 elevator shaft, 3a pit, 4 main rope, 5 hoist, 6 driving sheave, 9 guide rail, 10 landing, 11 guide rail, 20 rectangular frame, 20b through hole, 21 weight piece, 30, 30a, 30b, 30c, 30d, 30e, 30f rope shackle, 32 rope fixing part, 34 rod, 34a split pin hole, 36 adjustment nut, 38 fixing nut, 39 split pin, 40 anti-rotation plate, 42, 44, 46 long hole, 421, 441, 461 first long hole, 422, 442, 462 second long hole, 50 washer member, 52, 54, 56 washer hole, 100 anti-rotation device

Claims

1. A device for preventing the rotation of a plurality of rope shackles that respectively fasten the ends of a plurality of ropes that suspend an elevator car and a counterweight, The rope shackle is configured so that a split pin is attached to a split pin hole provided at the end, The anti-rotation tool is A rotation prevention plate having a long hole extending in the longitudinal direction; a plurality of washer members each having a washer hole with a diameter smaller than that of the head of the split pin; In each of two of the plurality of rope shackles, The anti-rotation device is fixed by the split pins in a state where the washer hole of the washer member, the long hole of the anti-rotation plate, and the split pin hole are overlapped in this order. A rotation preventing device for a rope shackle configured as follows.

2. The long hole is A first long hole provided on one end side of the rotation prevention plate; a second slot provided on the other end of the rotation prevention plate and separated from the first slot; 2. The anti-rotation device for a rope shackle according to claim 1, comprising:

3. The slot includes a plurality of slots having different widths. The anti-rotation device for a rope shackle according to claim 1 or 2.

4. The washer hole includes a plurality of holes having different diameters. The anti-rotation device for a rope shackle according to claim 1 or 2.

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