JP7766528B2 - Elevator main rope fixing device - Google Patents

Description

This invention relates to an elevator main rope fixing device that secures the main rope that suspends the car to the upper frame of the car.

In conventional elevator car frame main anchoring devices, a rope stop is attached to the end of the main rope, which is then attached to a rope stopper via the rope stopper. Because the main rope is typically made up of multiple ropes, multiple rope stops are arranged on the rope stopper. In other words, because multiple rope stops are arranged on a horizontal plane, a steel plate (flat plate) with a predetermined horizontal area is used for the rope stopper. Furthermore, because the rope stopper is constantly subjected to the load acting when the car is suspended from the main rope, it must be strong enough to withstand this load. Therefore, when the car is heavy, the rope stopper's plate thickness is increased to ensure strength. (See, for example, Patent Document 1.)

Patent No. 4994711

When the cage is heavy, a certain level of strength can be ensured by making the rope fastener plate thickness approximately 30 mm, for example. However, this rope fastener weighs approximately 80 kg, making it too heavy for a single worker to carry, which poses an issue of reduced workability. Furthermore, because the shape of the rope fastener varies depending on the number of main ropes, there is also the issue of an increased number of rope fastener types.

This invention was made to solve the above-mentioned problems, and its purpose 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 also aims to provide an elevator main rope fixing device that can reduce the number of rope fastener types required depending on the number of main ropes.

The elevator main rope fixing device of this invention has 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 run horizontally, and a rope fastener unit to which rope fasteners for the main ropes that suspend the car are attached and which supports the load acting on the rope fasteners, and is characterized in that the rope fastener unit is arranged in multiple numbers between the pair of upper beams and has at least one main rope connected to it, and has a fixing surface that is fixed between the pair of upper beams, a mounting surface that is provided opposite the fixing surface and to which the rope fasteners are attached, a support portion that connects the fixing surface and the mounting surface and supports the load acting on the mounting surface in the vertical direction via the rope fasteners, and a hollow portion formed by being surrounded by the fixing surface, the mounting surface, and the support portion.

This invention makes it possible to realize 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 makes it possible to realize an elevator main rope fixing device that can reduce the number of rope fastener types required depending on the number of main ropes.

1 is a front view showing a 1:1 roping elevator according to a first embodiment of the present invention. FIG. 2 is a front view showing the main fixing device (as a whole) of the elevator of FIG. 1 according to embodiment 1 of the present invention. FIG. 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. 3 is a perspective view showing a main part of the elevator main beam fixing device of FIG. 2 according to the first embodiment of the present invention, as viewed obliquely from below. FIG. 3 is a front view (enlarged view) showing a main part of the elevator main fixing device of FIG. 2 according to embodiment 1 of the present invention; FIG. FIG. 6 is a side view of the main fixing device of the elevator of FIG. 5 according to embodiment 1 of the present invention. 6 is a plan view of the elevator main bar fixing device of FIG. 5 according to the first embodiment of the present invention, as viewed from below. FIG. FIG. 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. 9 is a perspective view showing the rope fastener unit of FIG. 8 according to the first embodiment of the present invention, as viewed obliquely from below. FIG. 6 is a side view (enlarged view) showing a main part of an elevator main beam fixing device according to a second embodiment of the present invention. 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. FIG. 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. 13 is a perspective view showing the rope fastener unit of FIG. 12 according to a second embodiment of the present invention, as viewed obliquely from below.

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.

In the diagram, a machine room 2 is provided above the hoistway 1. A hoisting machine 3 and a deflector sheave 4 are provided in the machine room 2. Multiple 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 counterweight 7 are raised and lowered within the hoistway 1 by the driving force of the hoisting machine 3.

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 rope 5 via a main rope fixing device 13 provided on the upper beam 12. The counterweight 7 is connected to the other end of the main rope 5 via a rope stop (not shown) provided above the counterweight 7.

The main rope fixing device 13 has a rope stopper 14 to which the end of the main rope 5 is connected, and multiple rope stopper units 15 that 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 that surrounds the lower part of the shackle rod 16. The shackle rod 16 is arranged to pass vertically through the rope stopper unit 15, with one shackle rod 16 arranged for one rope stopper unit 15.

The rope fastener unit 15 is formed by bending a single flat plate several times and welding the ends, forming a hollow pipe shape extending in the longitudinal direction. The rope fastener unit 15 is made up of four surfaces: a fixed surface 18 (upper surface), both ends of which are fixed to the lower end surfaces of a pair of upper beams 12; an attachment surface 19 (lower surface), which is located opposite the fixed surface 18 and to which the rope fastener parts 14 are attached; and support parts 20 (both side surfaces), which connect the fixed surface 18 and attachment surface 19 on both sides of the longitudinal direction and support loads acting in the vertical direction on the rope fastener unit 15 via the rope fastener parts 14.

The rope fastener unit 15 has a hollow section 21 formed within it by the fixed surface 18, mounting surface 19, and support section 20. The hollow section 21 corresponds to the inside of a pipe shape, and the shackle rod 16 is arranged to pass through it vertically. The rope fastener unit 15 is strung longitudinally along the horizontal plane between a pair of upper beams 12, with both ends fixed, and a total of four units are arranged adjacent to each other longitudinally. The rope fastener section 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 hollow section 21, allowing it to move up and down.

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 24, and the rope fastener unit 15 is fixed to the lower ends of the upper beams 12 by the bolts 22.

The fixed surface 18 and mounting surface 19 of the rope fastener unit 15 each have a mounting hole 25 into which a shackle rod 16 is inserted, the shackle rod 16 being positioned to penetrate vertically. The mounting surface 19 of the rope fastener unit 15 has a rope fastener portion 14 that is positioned 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.

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

In other words, the rope fastening parts 14 that are placed through the mounting holes 25 are not placed on the same side of a 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 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 manner, 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.

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, because 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 positioned in the central portion of the rope fastener unit 15.

A slope 26 is formed near the bolt hole 23 of the support portion 20 so that the support portion 20 decreases in the vertical direction from the mounting surface 19 toward the fixing surface 18. This slope 26 shortens the distance from which the bolt 22 passing through the bolt hole 23 becomes exposed at both ends of the rope fastener unit 15 when the rope fastener unit 15 is fixed to a pair of upper beams 12, making it easier to fix the bolt.

In Example 1, the rope fastener unit 15 is made of 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.

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 stopper unit 15 from the main rope 5 via the rope stopper section 14. This load is received by the pair of upper beams 12 via the rope stopper unit 15. Here, while conventional rope stoppers are integrally formed from steel plate (plate thickness approximately 30 mm, weight approximately 80 kg), the rope stopper 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 overall weight (approximately 11 kg x 4 units = approximately 44 kg) is approximately half that of the conventional unit.

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.

Furthermore, with conventional rope fasteners, the number of main ropes 5 varies depending on factors such as the weight of the cage, so the plate thickness and size must be adjusted, necessitating the use of many different types of rope fasteners. Therefore, with the main rope fixing device 13, the minimum structural unit of the rope fastener is the rope fastener unit 15 (1 unit). Therefore, 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 required.

Furthermore, while conventional rope fasteners are subjected to the load of the entire main rope, the main rope fixing device 13 has four rope fastener units 15 arranged for each of the four main ropes 5, so the load acting on each rope fastener unit 15 is one-quarter of that of conventional systems. Furthermore, 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 fixed surface 18 and mounting surface 19 can be significantly reduced compared to conventional systems. As a result, the rope fastener units 15 can be made hollow, formed by the fixed surface 18, mounting surface 19, and support parts 20, eliminating the need to increase the thickness of the steel plate (solid shape) as in conventional systems.

As described above, according to embodiment 1, the elevator main beam fixing device 13 includes 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 run horizontally, and a rope stopper unit 15 to which a rope stopper portion 14 of the main rope 5 that suspends the car 6 is attached and which supports the load acting on the rope stopper portion 14. The rope stopper units 15 are arranged in multiple numbers between the pair of upper beams 12, and at least one main beam 5 is connected, and each This elevator main fastening device 13 includes a fixed surface 18 fixed between a pair of upper beams 12, a mounting surface 19 facing the fixed surface 18 and to which the rope fastening section 14 is attached, a support section 20 connecting the fixed surface 18 and the mounting surface 19 and supporting the load acting in the vertical direction on the mounting surface 19 via the rope fastening section 14, and a hollow section 21 formed by the fixed surface 18, the mounting surface 19, and the support section 20. This allows for a reduction in the weight of the rope fasteners even when the car 6 is heavy, and improves workability. It also allows for a reduction in the number of rope fasteners required depending on the number of main ropes.

The rope fastening unit 15 is fixed across the lengthwise direction between a pair of upper beams 12, and multiple rope fastening units 15 are arranged adjacent to each other in the lengthwise direction, thereby realizing an elevator main beam fixing device 13 that can distribute and arrange the main beams 5 in a balanced manner across multiple rope fastening units 15.

The rope fastener unit 15 is formed in a hollow pipe shape, making it possible to realize an elevator main fixing device 13 in which the rope fastener unit 15 can be easily formed simply by bending a flat plate. Furthermore, because it is formed in a hollow pipe shape, it is significantly lighter than conventional rope fasteners.

When viewed vertically, the rope stops 14 are arranged alternately on either side of the pair of upper beams 12, thereby increasing the distance between adjacent rope stops 14 and realizing an elevator main fixing device 13 that can avoid interference between the rope stops 14 arranged on the mounting surface 19.

Sloped surfaces 26 are formed on both ends of the support portion 20 so that the support portion 20 slopes downward 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.

Embodiment 2.
Fig. 10 is a side view (enlarged view) showing a main portion of an elevator main bar fixing device according to embodiment 2 of the present invention. Fig. 11 is a plan view seen from below of the elevator main bar fixing device 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.

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 denoted by the same symbols and their explanations are omitted.

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 positioned to penetrate vertically, is inserted. The seat plate 28 is positioned between the mounting surface 29 and the rope fastener portion 14, with the shackle rod 16 inserted into the mounting hole 31. The horizontal surface 30 is formed so that it can abut against the lower end surfaces of adjacent rope fastener units 32 when viewed vertically.

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

As described above, according to embodiment 2, a seat plate 28 is provided on the rope fastening portion 14 and supports the load acting from the main rope 5 to the rope fastening portion 14. The seat plate 28 is positioned 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 a single rope fastening unit 32. Furthermore, because 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.

Note that while 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 achieve the same effect. Furthermore, the hollow pipe shape does not have to be formed by bending a flat plate; it could be formed, for example, from an extruded material.

Furthermore, the rope fastening portions 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 portions 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 portions 14 can be positioned closer to the positions of adjacent rope fastening portions 14 without interfering with each other.

Furthermore, while 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 a positioning.

Furthermore, at both ends of the rope fastener unit 15, from the mounting surface 19 to the support portion 20, a slope is formed that slopes downward in the vertical direction from the mounting surface 19 toward the fixed surface 18, but this does not necessarily have to be the same shape. For example, by making the support portion 20 lower in the vertical direction, it becomes easier to secure the bolt 22, and it goes without saying that the same action and effect can be achieved.

1. Hoistway, 2. Machine room, 3. Hoist, 4. Deflector sheave 4, 5. Main rope, 6. Cage, 7. Counterweight, 8. Cage frame, 9. Cage body, 10. Vertical frame, 11. Lower frame, 12. Upper beam, 13, 27. Main beam fixing device, 14. Rope stop, 15, 32. Rope stop unit, 16. Shackle rod, 17. Shackle spring, 18. Fixing surface, 19, 29. Mounting surface, 20. Support, 21. Hollow portion, 22. Bolt, 23, 24. Bolt hole, 25, 31. Mounting hole, 26. Inclined surface, 28. Seat plate, 30. Horizontal surface

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 (6)

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