Elevator main rope fixing device

Abstract

To provide a main cable fixing device for an elevator capable of reducing the weight of a rope holding metal and improving workability even if the weight of a car is large.SOLUTION: A main cable fixing device 13 for an elevator includes: vertical frames standing at both sides of a car to support the car; a pair of upper beams 12 mutually connecting upper parts of the vertical frames and having opposite surfaces along a horizontal direction; and a rope holding metal unit 15 mounted with a rope holding part 14 of a main cable 5 for suspending the car and supporting the load acting on the rope holding part 14. A plurality of rope holding metal units 15 are arranged between the pair of upper beams 12 and connected with at least one main cable 5. The rope holding metal unit includes: a fixed surface fixed between the pair of upper beams 12, a mounting surface provided to face the fixed surface and mounted with the rope holding part 14; a support part for connecting the fixed surface and the mounting surface and supporting the load acting on the mounting surface in the vertical direction through the rope holding part 14; and a hollow part surrounded by the fixed surface, the mounting surface, and the support part.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] This invention relates to an elevator main rope fixing device that fixes the main rope that suspends the car to the upper frame of the car. [Background technology]

[0002] In a conventional main rope fixing device installed on the upper frame of an elevator car frame, a rope stop is attached to the end of the main rope, and the main rope is attached to a rope stop via the rope stop. Since the main rope is usually composed of multiple ropes, multiple rope stops are arranged on the rope stop. That is, since multiple rope stops are arranged on a horizontal plane, a steel plate (flat plate) with a predetermined horizontal area is used for the rope stop. Furthermore, since the load acting when suspending the car from the main rope is always acting on the rope stop, it is necessary to ensure that the rope stop has sufficient strength to withstand this load. Therefore, when the car is heavy, the rope stop's plate thickness is increased to ensure strength. (See, for example, Patent Document 1.) [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4994711 Summary of the Invention [Problem to be solved by the invention]

[0004] When the cage is heavy, the required strength can be ensured by making the rope fastener plate approximately 30 mm thick. However, this rope fastener weighs approximately 80 kg, which is too heavy for a single worker to carry, resulting in poor workability. In addition, the shape of the rope fastener varies depending on the number of main ropes, which increases the number of types of rope fasteners required.

[0005] The present invention has been made to solve the above-mentioned problems, and its object is to provide an elevator main rope fixing device that can reduce the weight of rope fasteners and improve workability even when the car weight is heavy. It is also an object of the present invention to provide an elevator main rope fixing device that can reduce the number of rope fasteners required depending on the number of main ropes. [Means for solving the problem]

[0006] The main features of the elevator in this invention are cable The fixing device is a main part of an elevator, which includes vertical frames that stand upright on both sides of the car and support the car, a pair of upper beams that connect the upper parts of the vertical frames to each other and have opposing surfaces that are aligned horizontally, and a rope stopper unit to which a rope stopper part of a main rope that suspends the car is attached and which supports the load acting on the rope stopper part. cable In the fixing device, a plurality of rope fastener units are arranged between a pair of upper beams and are connected to at least one main cable The structure is characterized by comprising a fixed surface to which the upper beams are connected and fixed between a pair of upper beams, an attachment surface that is provided opposite the fixed surface and to which a rope stopper is attached, a support portion that connects the fixed surface and the attachment surface and supports loads acting in the vertical direction on the attachment surface via the rope stopper, and a hollow portion that is surrounded by the fixed surface, attachment surface, and support portion. [Effects of the Invention]

[0007] This invention realizes an elevator main rope fixing device that can reduce the weight of rope fasteners and improve workability even when the car is heavy. It also realizes an elevator main rope fixing device that can reduce the number of rope fasteners required depending on the number of main ropes. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front view showing a 1:1 roping elevator according to a first embodiment of the present invention. [Figure 2] 2 is a front view showing the main beam fixing device (as a whole) for the elevator of FIG. 1 according to embodiment 1 of the present invention. FIG. [Figure 3]3 is a perspective view showing a main part of the elevator main beam fixing device of FIG. 2 according to embodiment 1 of the present invention, as viewed obliquely from above. FIG. [Figure 4] 3 is a perspective view showing a main part of the elevator main beam fixing device of FIG. 2 according to embodiment 1 of the present invention, as viewed obliquely from below. FIG. [Figure 5] 3 is a front view (enlarged view) showing a main part of the elevator main beam fixing device of FIG. 2 according to the first embodiment of the present invention. FIG. [Figure 6] FIG. 6 is a side view of the main beam fixing device for the elevator of FIG. 5 according to embodiment 1 of the present invention. [Figure 7] 6 is a plan view of the elevator main beam fixing device of FIG. 5 according to embodiment 1 of the present invention, as viewed from below. [Figure 8] 8 is a perspective view showing the rope fastener unit of FIG. 7 according to the first embodiment of the present invention, as viewed obliquely from above. FIG. [Figure 9] 9 is a perspective view showing the rope fastener unit of FIG. 8 according to the first embodiment of the present invention, viewed obliquely from below. [Figure 10] FIG. 10 is a side view (enlarged view) showing a main part of a main beam fixing device for an elevator according to a second embodiment of the present invention. [Figure 11] 11 is a plan view of the elevator main beam fixing device of FIG. 10 according to a second embodiment of the present invention, as viewed from below. FIG. [Figure 12] 12 is a perspective view showing the rope fastener unit of FIG. 11 according to a second embodiment of the present invention, as viewed obliquely from above. FIG. [Figure 13] FIG. 13 is a perspective view showing the rope fastener unit of FIG. 12 according to a second embodiment of the present invention, viewed obliquely from below. DETAILED DESCRIPTION OF THE INVENTION

[0009] Embodiment 1 FIG. 1 is a front view showing an elevator with 1:1 roping according to embodiment 1 of the present invention. FIG. 2 is a front view showing the main bar fastening device (as a whole) of the elevator of FIG. 1 according to embodiment 1 of the present invention. FIG. 3 is a perspective view, seen from obliquely above, showing essential parts of the main bar fastening device of the elevator of FIG. 2 according to embodiment 1 of the present invention. FIG. 4 is a perspective view, seen from obliquely below, showing essential parts of the main bar fastening device of the elevator of FIG. 2 according to embodiment 1 of the present invention. FIG. 5 is a front view (enlarged view) showing essential parts of the main bar fastening device of the elevator of FIG. 2 according to embodiment 1 of the present invention. FIG. 6 is a side view showing essential parts of the main bar fastening device of the elevator of FIG. 5 according to embodiment 1 of the present invention. FIG. 7 is a plan view, seen from below, showing essential parts of the main bar fastening device of the elevator of FIG. 5 according to embodiment 1 of the present invention. FIG. 8 is a perspective view, seen from obliquely above, showing the rope fastening unit of FIG. 7 according to embodiment 1 of the present invention. FIG. 9 is a perspective view, seen from obliquely below, showing the rope fastening unit of FIG. 8 according to embodiment 1 of the present invention.

[0010] In the figure, a machine room 2 is provided above a hoistway 1. A hoisting machine 3 and a deflector sheave 4 are provided in the machine room 2. A plurality of main ropes 5 serving as main ropes are wound around the sheave of the hoisting machine 3 and the deflector sheave 4. A car 6 and a counterweight 7 are suspended from the main ropes 5. The car 6 and the counterweight 7 are raised and lowered within the hoistway 1 by the driving force of the hoisting machine 3.

[0011] The car 6 has a car frame 8 and a car chamber main body 9 supported by the car frame 8. The car frame 8 is composed of a pair of vertical frames 10, a lower frame 11 provided between the lower ends of the pair of vertical frames 10, and a pair of upper beams 12 provided between the upper ends of the pair of vertical frames 10. The car 6 is connected to one end of the main ropes 5 via a main rope fixing device 13 provided on the upper beams 12. The counterweight 7 is connected to the other end of the main ropes 5 via a rope stopper (not shown) provided above the counterweight 7.

[0012] The main rope fixing device 13 has a rope stopper 14 to which the end of the main rope 5 is connected, and a plurality of rope stopper units 15 which are fixed to the underside of the upper beam 12 and to which the rope stopper 14 is attached. The rope stopper 14 has a shackle rod 16 to the upper part of which the end of the main rope 5 is connected, and a shackle spring 17 which surrounds the lower part of the shackle rod 16. The shackle rod 16 is arranged to pass vertically through the rope stopper unit 15, and one shackle rod 16 is arranged for one rope stopper unit 15.

[0013] The rope fastener unit 15 is formed by bending a single flat plate several times and welding the ends, and is shaped like a hollow pipe extending in the longitudinal direction. The rope fastener unit 15 is formed with a total of four surfaces: a fixed surface 18 (upper surface) whose both ends are fixed to the lower end surfaces of the pair of upper beams 12, an attachment surface 19 (lower surface) that is provided opposite the fixed surface 18 and to which the rope fastener parts 14 are attached, and support parts 20 (both side surfaces) that connect the fixed surface 18 and attachment surface 19 on both sides in the longitudinal direction and support the load acting in the vertical direction on the rope fastener unit 15 via the rope fastener parts 14.

[0014] Inside the rope fastener unit 15, there is a hollow portion 21 surrounded by a fixed surface 18, a mounting surface 19, and a support portion 20. The hollow portion 21 corresponds to the inside of a pipe shape, and the shackle rod 16 is disposed to pass through it in the vertical direction. The rope fastener unit 15 is strung between a pair of upper beams 12 along the horizontal plane with both ends fixed, and a total of four units are disposed adjacent to each other in the longitudinal direction. The rope fastener portion 14 is attached to the mounting surface 19 of the rope fastener unit 15, and the shackle rod 16 passes through the rope fastener unit 15 and the hollow portion 21 and is disposed so as to be movable up and down.

[0015] Bolt holes 23 through which bolts 22 pass are provided near both ends of the fixing surface 18, and bolt holes 24 through which bolts 22 pass are provided on the underside of the upper beam 12. Both ends of the fixing surface 18 are positioned in contact with the lower ends of the pair of upper beams 12, and bolts 22 are positioned passing through bolt holes 23 and bolt holes 24, and the rope fastener unit 15 is fixed to the lower ends of the upper beams 12 by the bolts 22.

[0016] The fixed surface 18 and the mounting surface 19 of the rope fastener unit 15 are each provided with a mounting hole 25 into which a shackle rod 16 is inserted, the shackle rod 16 being arranged to penetrate vertically. The mounting surface 19 of the rope fastener unit 15 is provided with a rope fastener part 14 that is arranged to penetrate the mounting hole 25 vertically and supports the end of one main rope 5. In other words, the ends of a total of four main ropes 5 are connected to the mounting surface 19 of the main rope fixing device 13.

[0017] One mounting hole 25 is provided for each rope fastener unit 15. Furthermore, the mounting holes 25 are formed so that when four rope fastener units 15 are fixed to the lower end of the upper beam 12, the mounting holes 25 are not located on the same side of the pair of upper beams 12 when viewed vertically, but are alternately positioned on opposite sides of the upper beam 12 relative to the positions of adjacent mounting holes 25.

[0018] That is, the rope fastening parts 14 that are placed through the mounting holes 25 are not placed on the same side of the pair of upper beams 12 when viewed vertically, but are placed on the opposite side of the upper beam 12 from the position of the adjacent rope fastening part 14. Here, the shackle rods 16 and shackle springs 17 placed on the rope fastening parts 14 are shaped to be wider than the main ropes 5, so if the rope fastening parts 14 are placed close to each other, they may interfere with each other. Therefore, by placing the rope fastening parts 14 in this way, the distance between adjacent rope fastening parts 14 is increased, making it possible to prevent the rope fastening parts 14 placed on the mounting surface 19 from interfering with each other.

[0019] Furthermore, a load acts on the rope fastener unit 15 in the vertical direction from the end of the main rope 5 via the rope fastener portion 14. At this time, since the point of application of this load (the rope fastener portion 14) is close to the upper beam 12, most of this load is received by the upper beam 12 via the rope fastener unit 15. In other words, the load acting on the central portion of the rope fastener unit 15 is reduced, so the rigidity required for the rope fastener unit 15 can be lower than when the rope fastener portion 14 is located in the central portion of the rope fastener unit 15.

[0020] Near the bolt holes 23 of the support part 20, a slope 26 is formed so that the support part 20 becomes lower in the vertical direction from the mounting surface 19 toward the fixing surface 18. When the rope fastener unit 15 is fixed to the pair of upper beams 12, this slope 26 shortens the distance from which the bolts 22 passing through the bolt holes 23 become exposed at both ends of the rope fastener unit 15, making it easier to fix the bolts.

[0021] The rope fastener unit 15 in Example 1 is formed from a steel plate with a pipe shape measuring 75 mm x 75 mm on one side, a longitudinal length of 466 mm, and a thickness of 6 mm. Each rope fastener unit 15 weighs 11 kg, and the total weight of four units is 44 kg.

[0022] Next, the operation of the first embodiment configured as described above will be explained. When the car 6 rises or falls, a load acts on the rope fastener unit 15 from the main rope 5 via the rope fastener portion 14. This load is received by the pair of upper beams 12 via the rope fastener unit 15. Here, while a conventional rope fastener is an integral piece of steel plate (plate thickness: approximately 30 mm, weight: approximately 80 kg), the rope fastener unit 15 is composed of units. Therefore, the smallest constituent unit is one unit (plate thickness: approximately 6 mm, weight: approximately 11 kg), and the total weight (approximately 11 kg x 4 units = approximately 44 kg) is approximately half that of the conventional unit.

[0023] In addition, by making the rope fastener unit 15 (1 unit), the weight (approximately 11 kg) can be assembled by a single worker at the elevator assembly site, improving workability.

[0024] Furthermore, with conventional rope fasteners, the number of main ropes 5 varies depending on factors such as the weight of the cage, so plate thickness and size must be adjusted, necessitating the use of many different types of rope fasteners. Therefore, with the main rope fastening device 13, the minimum structural unit of the rope fastener is the rope fastener unit 15 (1 unit), so even if the number of main ropes 5 varies, adjustments can be easily made simply by increasing or decreasing the number of rope fastener units 15 as needed. This makes it possible to reduce the number of rope fastener types.

[0025] Furthermore, whereas with conventional rope fasteners the load of the entire main rope acts on the rope, with the main rope fixing device 13, four rope fastener units 15 are arranged for four main ropes 5, so the load acting on one rope fastener unit 15 is one-fourth of that of conventional rope fasteners. Also, because most of the load acting on the rope fastener units 15 is received by the pair of upper beams 12 via the support parts 20, the strength of the fixing surfaces 18 and mounting surfaces 19 can be significantly reduced compared to conventional rope fasteners. As a result, the rope fastener units 15 can be made hollow, formed by the fixing surfaces 18, mounting surfaces 19 and support parts 20, so there is no need to increase the thickness of the steel plate (solid shape) as in conventional rope fasteners.

[0026] As described above, according to the first embodiment, the elevator main beam fixing device 13 has vertical frames 10 that stand upright on both sides of the car 6 and support the car 6, a pair of upper beams 12 that connect the upper parts of the vertical frames 10 to each other and have opposing surfaces that are aligned horizontally, and a rope stopper unit 15 to which rope stoppers 14 of the main ropes 5 that suspend the car 6 are attached and which supports the load acting on the rope stopper unit 14. The rope stopper units 15 are arranged in plural numbers between the pair of upper beams 12, and at least one main beam 5 is connected to each of the rope stopper units 15. By comprising a fixed surface 18 fixed between a pair of upper beams 12, an attachment surface 19 provided opposite fixed surface 18 and to which rope fastening section 14 is attached, a support section 20 connecting fixed surface 18 and attachment surface 19 and supporting loads acting in the vertical direction on attachment surface 19 via rope fastening section 14, and a hollow section 21 formed by being surrounded by fixed surface 18, attachment surface 19, and support section 20, it is possible to realize an elevator main beam fixing device 13 that is capable of reducing the weight of rope fasteners and improving workability even when the weight of car 6 is heavy.It is also possible to realize an elevator main beam fixing device 13 that can reduce the number of rope fasteners required depending on the number of main ropes.

[0027] The rope fastening unit 15 is fixed across the longitudinal direction between a pair of upper beams 12, and multiple rope fastening units 15 are arranged adjacent to each other in the longitudinal direction, thereby realizing an elevator main beam fixing device 13 in which the main beam 5 can be distributed and arranged in a balanced manner among multiple rope fastening units 15.

[0028] The rope fastener unit 15 is formed in a hollow pipe shape, which allows the elevator main fastening device 13 to be easily formed by simply bending a flat plate. Also, because it is formed in a hollow pipe shape, it can be made significantly lighter than conventional rope fasteners.

[0029] When viewed from the vertical direction, the rope stop parts 14 are arranged alternately on either side of the pair of upper beams 12, thereby increasing the distance between adjacent rope stop parts 14 and realizing an elevator main fixing device 13 that can avoid interference between the rope stop parts 14 arranged on the mounting surface 19.

[0030] At both ends of the support portion 20, slopes 26 are formed so that the support portion 20 becomes lower in the vertical direction from the mounting surface 19 toward the fixing surface 18, thereby realizing an elevator main fixing device 13 that makes it easier to fix the bolts when fixing the rope fastener unit 15 to a pair of upper beams 12.

[0031] Embodiment 2 Fig. 10 is a side view (enlarged view) showing a main part of a main bar fixing device for an elevator according to embodiment 2 of the present invention. Fig. 11 is a plan view seen from below of the main bar fixing device for an elevator of Fig. 10 according to embodiment 2 of the present invention. Fig. 12 is a perspective view seen from diagonally above showing the rope fastener unit of Fig. 11 according to embodiment 2 of the present invention. Fig. 13 is a perspective view seen from diagonally below showing the rope fastener unit of Fig. 12 according to embodiment 2 of the present invention.

[0032] In the figure, the main beam fixing device 27 according to embodiment 2 of the present invention differs in that it is equipped with a seat plate 28 that supports the load acting from the main beam 5 to the rope fastening portion 14; other similar parts are marked with the same symbols and their explanations are omitted.

[0033] The seat plate 28 has a horizontal surface 30 that abuts against the mounting surface 29, and is provided with a mounting hole 31 into which the shackle rod 16, which is arranged to penetrate vertically, is inserted. The seat plate 28 is arranged between the mounting surface 29 and the rope fastener part 14, with the shackle rod 16 inserted into the mounting hole 31. The horizontal surface 30 is formed so as to be able to abut against the lower end surfaces of adjacent rope fastener units 32 when viewed vertically.

[0034] Next, the operation of the second embodiment configured as described above will be described. When the car 6 rises or falls, a load acts on the rope fastener units 32 from the main ropes 5 via the rope fastener portions 14 and the seat plates 28. At this time, the seat plates 28 abut against the lower end surfaces of the adjacent rope fastener units 32, so the load acting from the main ropes 5 is distributed and received by the multiple rope fastener units 32. Therefore, the load acting on one rope fastener unit 32 is reduced, and the strength of the rope fastener units 32 can be reduced.

[0035] As described above, according to the second embodiment, a seat plate 28 is provided on the rope fastening portion 14 to support the load acting from the main rope 5 to the rope fastening portion 14, and the seat plate 28 is arranged in contact with the lower end surfaces of multiple rope fastening units 32, thereby realizing a main rope fastening device 27 for an elevator that reduces the load acting on one rope fastening unit 32. In addition, since the rope fastening unit 32 can be made weaker than the rope fastening unit 15, the main rope fastening device 27 can be made even lighter than the main rope fastening device 13.

[0036] Although the rope fastener units 15, 32 are hollow pipe-shaped, they do not necessarily have to be this shape. For example, it goes without saying that hollow shapes such as a U-shaped or H-shaped cross section will provide the same functions and effects. Furthermore, the hollow pipe shape does not have to be formed by bending a flat plate; for example, it can be formed from an extruded material.

[0037] Furthermore, the rope fastening parts 14 provided on the rope fastening unit 15 are positioned on the opposite side of the upper beam 12 from the positions of adjacent rope fastening parts 14 when viewed vertically, but this positioning is not necessary. For example, if the width of the rope fastening unit 15 is increased, the rope fastening parts 14 can be positioned closer to the positions of adjacent rope fastening parts 14 without interfering with each other.

[0038] Furthermore, although the rope fastening portion 14 is positioned close to one side of the pair of upper beams 12 when viewed vertically, this positioning is not necessary. For example, the rope fastening portion 14 may be positioned close to each side of the pair of upper beams 12, with multiple main ropes 5 arranged in one rope fastening unit 15. The rope fastening portion 14 may also be positioned in the center of the rope fastening unit 15. It goes without saying that similar actions and effects can be achieved by, for example, increasing the strength of the rope fastening unit 15 to the minimum necessary so that it can withstand such an arrangement.

[0039] Furthermore, at both ends of the rope fastener unit 15, from the mounting surface 19 to the support portion 20, a slope is formed so that it becomes lower in the vertical direction from the mounting surface 19 toward the fixed surface 18, but it does not necessarily have to be the same shape. For example, by forming the support portion 20 in a shape that keeps the height direction low, it becomes easier to fix the bolt 22, and it goes without saying that the same action and effect is achieved. [Explanation of symbols]

[0040] 1 elevator shaft, 2 machine room, 3 hoist, 4 deflector 4, 5 main rope, 6 car, 7 counterweight, 8 car frame, 9 car body, 10 vertical frame, 11 lower frame, 12 upper beam, 13, 27 main beam fixing device, 14 rope stopper, 15, 32 rope stopper unit, 16 shackle rod, 17 shackle spring, 18 fixing surface, 19, 29 mounting surface, 20 support part, 21 hollow part, 22 bolt, 23, 24 bolt hole, 25, 31 mounting hole, 26 inclined surface, 28 seat plate, 30 horizontal surface [Industrial Applicability]

[0041] The present invention relates to an elevator main rope fixing device that fixes the main rope that suspends the car to the upper frame of the car.

Claims

1. An elevator main rope fixing device having vertical frames that stand upright on both sides of a car and support the car, a pair of upper beams that connect upper parts of the vertical frames to each other and have opposing surfaces that extend along the horizontal direction, and a rope stopper unit to which rope stops for main ropes that suspend the car are attached and that supports loads acting on the rope stoppers, The rope fastening unit is arranged in multiple units between the pair of upper beams, and at least one of the main ropes is connected to the fixed surface fixed between the pair of upper beams; an attachment surface provided opposite the fixed surface and to which the rope fastening portion is attached; a support portion that connects the fixed surface and the attachment surface and supports the load acting in the vertical direction on the attachment surface via the rope fastening portion; and a hollow portion formed by being surrounded by the fixed surface, the attachment surface, and the support portion. An elevator main rope fixing device comprising:

2. The elevator main rope fixing device according to claim 1, characterized in that the rope fastening unit is fixed across the longitudinal direction between the pair of upper beams, and the plurality of rope fastening units are arranged adjacent to each other in the longitudinal direction.

3. 3. The elevator main rope fixing device according to claim 1, wherein the rope fastener unit is formed in a hollow pipe shape.

4. The elevator main rope fixing device according to any one of claims 1 to 3, characterized in that the rope stoppers are arranged alternately on either side of the pair of upper beams when viewed vertically.

5. The elevator main rope fixing device according to any one of claims 1 to 4, characterized in that a slope is formed at both ends of the support part so that the support part becomes lower in the up-down direction from the mounting surface toward the fixing surface.

6. A support means is provided on the rope stopper to support the load acting on the rope stopper from the main rope, 6. The elevator main rope fixing device according to claim 1, wherein the support means is arranged in contact with the lower end surfaces of the plurality of rope fastener units.

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