Elevator rope shackle anti-rotation device

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] This disclosure relates to a rope shackle anti-rotation device for an elevator.

Background Art

[0002] Patent Document 1 discloses a technique related to an anti-rotation structure for a shackle rod of an elevator. The anti-rotation structure of this technique inserts a wire through the gap portion of the socket of the shackle rod and uses its bending rigidity to prevent the rotation of each shackle rod with respect to the locking member.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Although the rope shackle of an elevator has a gap portion in the socket as in Patent Document 1, there are also those without a gap portion in the socket. The anti-rotation structure described in Patent Document 1 has a problem that the applicable rope shackles are limited to those with a gap portion in the socket.

[0005] This disclosure has been made to solve the above problems, and an object thereof is to provide a technique for a rope shackle anti-rotation device applicable to a wide variety of rope shackles.

Means for Solving the Problems

[0006] The rope shackle anti-rotation device of this disclosure is applied to an anti-rotation device for a plurality of rope shackles that secure the ends of a plurality of ropes that suspend an elevator car and a counterweight. The rope shackle is configured such that a cotter pin is inserted into a cotter pin hole provided at its end. The anti-rotation device comprises an anti-rotation plate having an elongated hole extending in the longitudinal direction, and a plurality of washer members having washer holes smaller in diameter than the head of the cotter pin, and in each of two of the plurality of rope shackles, the anti-rotation device is configured to be fixed by the respective cotter pins in a stacked state with the washer holes of the washer members, the elongated holes of the anti-rotation plate, and the cotter pin holes in that order. The elongated hole is configured to include a first elongated hole provided on one end of the anti-rotation plate and a second elongated hole provided on the other end of the anti-rotation plate, separated from the first elongated hole. Alternatively, the elongated holes may be configured to include multiple elongated holes with different width dimensions. Alternatively, the washer hole may be configured to include multiple holes of different diameters. [Effects of the Invention]

[0007] The anti-rotation device for elevator rope shackles described herein is attached to the ends of two rope shackles by cotter pins, and therefore there are no restrictions on the shape of the rope shackles to which it can be attached. As a result, it can be attached to a wide range of rope shackles, making it possible to provide a highly versatile and easy-to-use anti-rotation device technology. [Brief explanation of the drawing]

[0008] [Figure 1] This figure shows an example of an elevator to which the anti-rotation device in the embodiment is applied. [Figure 2] This is a view of the elevator from direction AA in Figure 1. [Figure 3] This is a diagram illustrating the configuration of the anti-rotation device in the embodiment. [Figure 4] This figure shows an example of attaching the anti-rotation device of the embodiment to an elevator. [Figure 5] This is a view of the anti-rotation device installed between the rope shackles 30a and 30b, as seen from direction C in Figure 4. [Figure 6]This figure shows the first modified example of the anti-rotation device. [Figure 7] This figure shows a second modified example of the anti-rotation device. [Figure 8] This figure shows a first modified example of a washer component. [Figure 9] This figure shows a second modified example of the washer component. [Modes for carrying out the invention]

[0009] The embodiments will be described below with reference to the drawings. In each drawing, elements common to all parts are denoted by the same reference numerals, and redundant explanations are omitted.

[0010] Embodiment. 1. Configuration of the elevator in the embodiment Figure 1 shows an example of an elevator to which a rotation-preventing device in an embodiment is applied. The elevator comprises a car 1 and a counterweight 2. The car 1 has an internal space formed by connecting a plurality of panel members to each other. The car 1 moves up and down in the 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 a main rope 4.

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

[0012] Figure 2 is a view of the elevator from the direction AA in Figure 1. The guide rails 9 are installed 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 below the landing 10 on the lowest floor of the hoistway 3. The elevator car 1 is positioned between the two guide rails 9.

[0013] The counterweight 2 includes a rectangular frame 20 and weight pieces 21 disposed within the frame of the rectangular frame 20. The counterweight 2 moves in a direction opposite to the direction in which the cage 1 moves in the hoistway 3 on the back side of the cage 1. The movement of the counterweight 2 is guided by the guide rails 11.

[0014] The guide rails 11 are provided linearly 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 disposed between the two guide rails 11.

[0015] In this way, the cage 1 and the counterweight 2 are suspended in a pulley-like manner so as to move up and down in opposite directions within the hoistway 3 by the main ropes 4. That is, the main ropes 4 suspend the cage 1 and the counterweight 2 in a 1:1 roping system within the hoistway 3. Note that the cage 1 and the counterweight 2 are suspended by a plurality of main ropes 4. In the elevator device of the present 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. Also, 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 portion 32 and a rod 34 are connected. One end of the main rope 4 is fixed and connected to the rope fixing portion 32.

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

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

[0019] 2. Configuration of the anti-rotation device in the embodiment The tension of the main ropes 4 is adjusted periodically. Workers loosen the fixing nuts 38 corresponding to each main rope 4 and then adjust the tension of the main ropes 4 to the specified range by turning the adjustment nuts 36. However, if the cage 1 is raised and lowered repeatedly, twisting may occur in the main ropes 4. In this case, when the fixing nuts 38 are loosened during the tension adjustment work, the main ropes 4 may rotate around their axis, causing the tension to shift. The anti-rotation device of this embodiment is attached by 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 their axis during the tension adjustment work. The configuration of the anti-rotation device of this embodiment will be described in detail below.

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

[0021] The washer member 50 is a circular metallic washer, and has external dimensions equivalent to, for example, the dimensions of the short side of the anti-rotation plate 40. The washer member 50 has three washer holes 52, 54, and 56 of different diameters arranged side by side. Washer hole 52 has a diameter that corresponds to a cotter pin with a nominal diameter of 4 mm. Washer hole 54 has a diameter that corresponds to a cotter pin with a nominal diameter of 5 mm. Washer hole 56 has a diameter that corresponds to a cotter pin with a nominal diameter of 6 mm. In other words, the washer holes 52, 54, and 56 are smaller in diameter than the heads of cotter pins with nominal diameters of 4 mm, 5 mm, and 6 mm, respectively.

[0022] Figure 4 shows an example of attaching the anti-rotation device of the embodiment to an elevator. Figure 4 is a view from cross section BB of the elevator with four sets of anti-rotation devices 100 attached to the rope shackle 30 in Figure 2. Figure 5 is a view from direction C in Figure 4 of the anti-rotation device 100 attached between the rope shackles 30a and 30b.

[0023] In the example shown in Figure 4, the anti-rotation plate 40 of the anti-rotation device 100 is installed between rope shackles 30a and 30b, between rope shackles 30b and 30c, between rope shackles 30d and 30e, and between rope shackles 30e and 30f, respectively. Existing cotter pins 39 are used for installation. For example, if the nominal diameter of the cotter pin 39 is 5 mm, the first elongated hole 441 and the second elongated hole 442 of the anti-rotation plate 40 are used. However, depending on its rotational position, the cotter pin 39 may come out of the first elongated hole 441 or the second elongated hole 442. Therefore, a washer member 50 is inserted between the anti-rotation plate 40 and the end of the cotter pin 39. For example, if the nominal diameter of the cotter pin 39 is 5 mm, the anti-rotation device 100 is fixed by the cotter pin 39 in the following order: the washer hole 54 of the washer member 50, the first elongated hole 441 or the second elongated hole 442 of the anti-rotation plate 40, and the cotter pin hole 34a of the rope shackle 30.

[0024] 3. Operation and effect of the anti-rotation device of the embodiment The anti-rotation device 100 configured as described above provides the following functions and effects.

[0025] The anti-rotation device 100 has a structure that connects the ends of the rods 34 of a pair of rope shackles 30 with a common anti-rotation plate 40, thereby preventing each of the pair of rope shackles 30 from rotating. Furthermore, since the anti-rotation device 100 is attached using the existing cotter pin 39 that is attached to the rope shackles 30, 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, respectively, to accommodate cotter pins of three different nominal diameters. With this configuration, it is possible to accommodate cotter pins of multiple nominal diameters, thereby improving the versatility of the anti-rotation device 100.

[0027] The anti-rotation plate 40 is provided with a first elongated hole 421 and a second elongated hole 422, a first elongated hole 441 and a second elongated hole 442, and a first elongated hole 461 and a second elongated hole 462, respectively, along its 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 rope 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 raising or lowering the counterweight 2. For this reason, 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 attached at all times.

[0029] 4. Variations The anti-rotation device 100 according to this embodiment may also be modified in the following manner.

[0030] 4-1. Anti-rotation device 100 There are no limitations on the number of anti-rotation plates 40 and washer members 50 used in the anti-rotation device 100. For example, if there are three or four rope shackles 30 in use, two anti-rotation plates 40 and four washer members 50 are used, and if there are six rope shackles 30 in use, 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 provided in the elevator.

[0031] 4-2. Anti-rotation plate 40 Figure 6 shows a first modified example of the anti-rotation device. In this first modified example, instead of the first and second elongated holes 421 and 422, the first and second elongated holes 441 and 442, and the first and second elongated holes 461 and 462 shown in Figure 3, a continuous series of elongated holes 42, 44, and 46 are formed in the longitudinal direction. With this configuration, the degree of freedom regarding the spacing between the pair of rope shackles 30 to be attached is improved.

[0032] There is no limit to the number of types of elongated holes formed in the anti-rotation plate 40. That is, the anti-rotation plate 40 may have only one of the following types of elongated holes: first elongated hole 421 and second elongated hole 422, first elongated hole 441 and second elongated hole 442, and first elongated hole 461 and second elongated hole 462, or it may have elongated holes corresponding to four or more different width dimensions. Figure 7 shows a second modified example of the anti-rotation device. In this second modified example, an anti-rotation plate 40 is shown that has only the first elongated hole 441 and second elongated hole 442 formed therein. Furthermore, as in the first modified example, the first elongated hole 441 and second elongated hole 442 of the anti-rotation plate 40 may be configured as a continuous elongated hole 44 in the longitudinal direction.

[0033] 4-3. Washer component 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 have only one type of washer hole corresponding to the nominal diameter of the cotter pin used, or it may have washer holes corresponding to four or more nominal diameters. Figure 8 shows a first modified example of the washer member. In this first modified example shown in the figure, a single washer hole 54 is formed. With such a configuration, it becomes possible to use, for example, a general-purpose washer.

[0034] There are no limitations on the shape of the washer member 50; that is, the outer shape of the washer member 50 does not have to be circular. Figure 9 shows a second modified example of the washer member. As shown in Figure 9, there are no limitations on the arrangement of the washer holes 52, 54, and 56.

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

[0036] The various aspects of this disclosure are summarized below as an appendix.

[0037] (Note 1) A device to prevent rotation of multiple rope shackles, which secure the ends of multiple ropes that suspend the elevator car and counterweight, The rope shackle is configured such that a cotter pin is inserted into a cotter pin hole provided at its end. The aforementioned anti-rotation device is A rotation prevention plate having an elongated hole extending in the longitudinal direction, The system comprises a plurality of washer members having washer holes smaller in diameter than the head of the cotter pin, In each of the two of the aforementioned rope shackles, The anti-rotation device is fixed by the respective cotter pins in a state where the washer hole of the washer member, the elongated hole of the anti-rotation plate, and the cotter pin hole are stacked in that order. A rope shackle anti-rotation device configured in such a way. (Note 2) The aforementioned elongated hole is The first elongated hole provided on one end of the anti-rotation plate, A second elongated hole is provided on the other end of the aforementioned anti-rotation plate, and is separated from the first elongated hole, A rope shackle anti-rotation device as described in Appendix 1, including the one specified above. (Note 3) The aforementioned elongated holes include a plurality of elongated holes with different width dimensions. A rope shackle anti-rotation device as described in Appendix 1 or Appendix 2. (Note 4) The washer hole includes a plurality of holes with different diameters. A rope shackle anti-rotation device as described in any one of the items in Appendix 1 to Appendix 3. [Explanation of symbols]

[0038] 3 Hoistway, 3a Pit, 4 Main rope, 5 Hoisting machine, 6 Drive 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 Slotted holes, 421, 441, 461 First slotted holes, 422, 442, 462 Second slotted holes, 50 Washer member, 52, 54, 56 Washer holes, 100 Anti-rotation device

Claims

1. A device to prevent rotation of multiple rope shackles, each locking the end of a plurality of ropes that suspend an elevator car and a counterweight, The rope shackle is configured such that a cotter pin is inserted into a cotter pin hole provided at its end. The aforementioned anti-rotation device is A rotation prevention plate having an elongated hole extending in the longitudinal direction, The system comprises a plurality of washer members having washer holes smaller in diameter than the head of the cotter pin, In each of the two of the aforementioned rope shackles, The anti-rotation device is configured to be fixed by the respective cotter pins when the washer hole of the washer member, the elongated hole of the anti-rotation plate, and the cotter pin hole are stacked in that order. The aforementioned elongated hole is The first elongated hole provided on one end of the anti-rotation plate, A second elongated hole is provided on the other end of the aforementioned anti-rotation plate, and is separated from the first elongated hole, A rope shackle anti-rotation device, including one for rope shackles.

2. A device to prevent rotation of multiple rope shackles, each locking the end of a plurality of ropes that suspend an elevator car and a counterweight, The rope shackle is configured such that a cotter pin is inserted into a cotter pin hole provided at its end. The aforementioned anti-rotation device is A rotation prevention plate having an elongated hole extending in the longitudinal direction, The system comprises a plurality of washer members having washer holes smaller in diameter than the head of the cotter pin, In each of the two of the aforementioned rope shackles, The anti-rotation device is configured to be fixed by the respective cotter pins when the washer hole of the washer member, the elongated hole of the anti-rotation plate, and the cotter pin hole are stacked in that order. The aforementioned elongated holes are a rotation-preventing device for a rope shackle, comprising multiple elongated holes of different widths.

3. A device to prevent rotation of multiple rope shackles, each locking the end of a plurality of ropes that suspend an elevator car and a counterweight, The rope shackle is configured such that a cotter pin is inserted into a cotter pin hole provided at its end. The aforementioned anti-rotation device is A rotation prevention plate having an elongated hole extending in the longitudinal direction, The system comprises a plurality of washer members having washer holes smaller in diameter than the head of the cotter pin, In each of the two of the aforementioned rope shackles, The anti-rotation device is configured to be fixed by the respective cotter pins when the washer hole of the washer member, the elongated hole of the anti-rotation plate, and the cotter pin hole are stacked in that order. The washer hole is a rotation-preventing device for a rope shackle that includes multiple holes of different diameters.

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