JP7544578B2 - Elevator cars and elevators - Google Patents

Description

The present invention relates to an elevator car and an elevator.

Conventionally, elevators equipped with load sensors that detect the load on the car are known. Patent Document 1 discloses a configuration for detecting the load on the car using a detection plate that is integrally provided on the floor of the car and a load sensor that is held so that its upper end faces the detection plate.

In Patent Document 1, anti-vibration rubber is placed between the floor and outer frame of the car, and the detection plate and load sensor are placed between the outer frame held by the anti-vibration rubber and the floor. The load sensor detects the distance from the load sensor to the detection plate, which changes due to the deflection of the floor caused by the load, thereby detecting the load of the car.

JP 2017-43466 A

However, high-speed elevators that can carry large loads have a large floor area, and floor deflection is highly dependent on the loading position of passengers and other cargo. For this reason, the conventional under-floor load detection method, which places load sensors under the floor, has the problem that the detected value is significantly affected by the loading position of passengers, making it impossible to detect an accurate value. Therefore, in order to maintain the accuracy of load detection, it is necessary to place more load sensors (for example, four or more) than conventional sensors, which poses the problem of high costs.

Furthermore, when inspecting the load sensors, workers must inspect multiple load sensors placed under the floor of the car, which increases the number of work steps. Therefore, there is a demand for a structure in elevator cars that allows for easy inspection of load sensors.

The present invention aims to provide an elevator car and elevator that can maintain the accuracy of load detection without incurring costs and improves the ease of inspecting the load sensor device.

To solve the above problems and achieve the object of the present invention, the elevator car of the present invention comprises a car body for carrying passengers and baggage, a car frame supporting the car body, and an upper car pulley attached to the car frame at the top of the car body and around which a main rope is wound. The elevator car of the present invention also comprises a pulley support part that rotatably supports the upper car pulley, a load sensor device provided between the car frame and the pulley support part, and an upper car pulley cover that is attached to the car frame so as to cover the upper car pulley in an area including the load sensor device and has an inspection window for use when inspecting the load sensor device.

The elevator of the present invention is equipped with the above-mentioned elevator car.

The present invention makes it possible to maintain the accuracy of load detection in elevator cars without incurring costs, and improves the ease of inspecting the load sensor device.

1 is a schematic diagram showing an example of the configuration of an elevator car according to an embodiment of the present invention; Figure 2A is a schematic diagram of the main parts including the car-mounted pulley 30 in the car 40 of this embodiment viewed from the front, and Figure 2B is a schematic diagram of the main parts including the car-mounted pulley 30 in the car 40 viewed from the side. Figure 3A is a schematic diagram of the appearance when the car pulley cover 20 is attached to the car pulley 30, viewed from the front, and Figure 3B is a schematic diagram of the appearance when the car pulley cover 20 is attached to the car pulley 30, viewed from the side. FIG. 4 is a schematic diagram of the load sensor device 27 with the cover 21b removed from the inspection window 21 during inspection.

Below, an example of an elevator car and elevator according to an embodiment of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the following example. In each of the drawings described below, common parts are given the same reference numerals.

1. Configuration of the elevator car First, an elevator and a car according to one embodiment of the present invention (hereinafter referred to as the present embodiment) will be described with reference to Fig. 1. Fig. 1 is a schematic diagram showing a configuration example of an elevator 1 according to the present embodiment.

As shown in FIG. 1, the elevator 1 of this embodiment is installed in a hoistway 2 formed in an architectural structure. The elevator 1 includes a car 40 that moves up and down in the hoistway 2 and carries people and luggage, and a main rope 13. In the following description, the direction in which the car 40 moves up and down is referred to as the up and down direction.

[Elevator shaft]
The elevator shaft 2 is a space for the elevator car 40 to ascend and descend, and is provided vertically penetrating each floor inside the building. A guide rail (not shown) that guides the elevator car 40 as it ascends and descends is attached to the inner wall surface of the elevator shaft 2. Furthermore, landing doors (not shown) that lead to each floor are provided on the wall surface of the elevator shaft 2 at height positions corresponding to each floor.

[Car]
The car 40 is connected to a counterweight (not shown) via the main rope 13, and moves up and down in the hoistway 2. The car 40 is guided by a guide rail (not shown) provided on the wall surface in the hoistway 2, and moves up and down in the hoistway 2. As will be described later, a car door 4 is provided on the front side of the car body 3 of the car 40 at a position corresponding to the landing door, and when the car stops at each floor, the car door 4 and the landing door open, allowing people and luggage to get on and off the car 40. The car 40 will be described in detail later.

[Main rope]
The main rope 13 has a middle portion wound around an upper pulley 30 (see FIG. 2A) of the car 40 and is connected to a hoist and a counterweight (not shown). The main rope 13 is wound up by the hoist (not shown), causing the car 40 to ascend and descend.

Next, the passenger car 40 of this embodiment will be described. The passenger car 40 of this embodiment includes a car body 3, a car frame 5, a pulley support portion 22, and an upper-car pulley 30. The passenger car 40 also includes an upper-car vibration isolating rubber 24 (see FIG. 2A), a load sensor device 27, and an upper-car pulley cover 20.

The car 40 of this embodiment is characterized by the position of the load sensor device 27 and the configuration of the car-top pulley cover 20. Fig. 2A is a schematic diagram of the main parts of the car 40 of this embodiment, including the car-top pulley 30, as viewed from the front, and Fig. 2B is a schematic diagram of the main parts of the car 40, including the car-top pulley 30, as viewed from the side. Note that in Figs. 2A and 2B, the car-top pulley cover 20 is shown in phantom lines. Fig. 3A is a schematic diagram of the main parts of the car-top pulley cover 20 attached to the car-top pulley 30, as viewed from the front, and Fig. 3B is a schematic diagram of the main parts of the car-top pulley cover 20 attached to the car-top pulley 30, as viewed from the side.

[Basket body]
The car body 3 is formed in a hollow, generally rectangular parallelepiped shape, and is composed of a car floor 9, a ceiling, and a side wall provided between the car floor and the ceiling, as shown in Fig. 1. A car door 4 is provided on the front surface of the car body 3, which corresponds to the landing door of the elevator shaft 2.

[Basket frame]
The car frame 5 is composed of an upper frame 6, a lower frame 8, and a vertical frame 7, and supports the car body 3 inside the car frame 5. The lower frame 8 is disposed below the car 40 in the up-down direction, and supports a compensating bracket 14. A tail cord beam 15 and a compensating suspension plate 16 are fixed to this compensating bracket 14. A tail cord 18 is fixed to this tail cord beam 15, and a compensating rope 17 is suspended from the compensating suspension plate 16. In addition, an underfloor base 11 is provided on the car 40 side of the lower frame 8. A plurality of under-car vibration isolating rubbers 10 are arranged between this underfloor base 11 and the car floor 9. The under-car vibration isolating rubbers 10 are made of an elastic member having a predetermined spring constant.

The vertical frame 7 is made up of members extending in the lifting direction, and is provided on both sides adjacent to the side on which the car door 4 of the car 40 is provided. The vertical frame 7 is connected to the upper frame 6 and the lower frame 8, and guide rollers 12 that slide along guide rails in the elevator shaft 2 are provided at both ends of the vertical direction sandwiching the car 40.

The upper frame 6 is a beam-shaped member arranged on the upper side of the car 40 in the vertical direction, and is fixed between two vertical frames 7, 7 arranged opposite to each other. In this embodiment, as shown in FIG. 2B, a pair of upper frames 6 are arranged to sandwich the upper end of the car pulley 30 in a direction perpendicular to the rotation plane of the car pulley 30. The upper frame 6 is a member with a U-shaped cross section, with both ends in the vertical direction having bent parts 6a, 6b bent at right angles to the side opposite to the side where the car pulley 30 is arranged. An upper-car vibration isolator 24 is arranged between the lower bent part 6b in the vertical direction of the upper frame 6 and the pulley support part 22 (FIG. 2A) described later. The upper frame 6 supports the pulley support part 22 via the upper-car vibration isolator 24, and also supports the car pulley cover 20.

[Cage pulley]
The car upper pulley 30 is a cylindrical member around which the main rope 13 is wound, and is provided on the upper surface side in the vertical direction of the car body 3. The car upper pulley 30 is rotatably supported by a pulley support part 22 (described later) by a pulley shaft 31 provided in the center of the rotation surface.

[Pulley support part]
The pulley support portion 22 is formed of a plate-like member longer than the diameter of the on-cage pulley 30. In this embodiment, a pair of pulley support portions 22 are provided to sandwich the on-cage pulley 30 in a direction perpendicular to the rotation plane of the on-cage pulley 30. A pulley shaft 31 is supported between the pair of pulley support portions 22 arranged to sandwich the on-cage pulley 30, and the on-cage pulley 30 is rotatably supported by this pulley shaft 31. Furthermore, a connecting member 23 connecting the pair of pulley support portions 22 is fixed by a bolt (not shown) to both end faces in the left-right direction perpendicular to the up-down direction of each pulley support portion 22. The pair of pulley support portions 22 provided to sandwich the on-cage pulley 30 are integrally formed by this connecting member 23.

As shown in FIG. 2B, the pulley support portion 22 has bent portions 22a, 22b at both ends in the vertical direction of the pulley support portion 22, which are bent at right angles to the side opposite the side on which the car pulley 30 is disposed. On one side (one side) and the other side (other side) of the rotating surface of the car pulley 30, car-mounted vibration-proof rubber 24 is disposed between the upper bent portion 22a of the pulley support portion 22 and the lower bent portion 6b in the vertical direction of the upper frame 6.

[Above-basket vibration-isolating rubber]
A plurality of car-upper vibration-proof rubbers 24 are arranged at predetermined intervals between the upper frame 6 and the pulley support portion 22 in the extension direction of the pulley support portion 22. These car-upper vibration-proof rubbers 24 are fixed to the upper frame 6 and the pulley support portion 22 by bolts not shown. In this embodiment, the car-upper vibration-proof rubbers 24 are fixed to the upper frame 6 and the pulley support portion 22 by bolts not shown, so that the pulley support portion 22 is fixed to the upper frame 6 via the car-upper vibration-proof rubbers 24.

The car-top vibration isolation rubber 24, like the car-bottom vibration isolation rubber 10, is made of an elastic material with a predetermined spring constant. Incidentally, the car-top vibration isolation rubber 24 supports the weight of the car body 3, as well as the load mass and the suspended mass of the compensating rope 17 and tail cord 18. In other words, the load of the car 40 suspended from the main rope 13 is entirely supported by the car-top vibration isolation rubber 24. Therefore, the size of each car-top vibration isolation rubber 24 and the number of pieces to be arranged are set to a level that can withstand that load.

[Load sensor device]
The load sensor device 27 is a device that detects the load applied to the car 40, and is provided in the space between the upper frame 6 and the pulley support part 22 formed by the arrangement of the car-upper vibration isolation rubber 24, on the outside of the car-upper vibration isolation rubber 24 on the side opposite to the car-upper pulley 30. In this embodiment, the load sensor device 27 is provided at two locations corresponding to diagonal positions with respect to the central axis of the car-upper pulley 30.

The load sensor device 27 is composed of a detection plate 25 made of a plate-like member and a sensor unit 26 that detects the position of the detection plate 25. The detection plate 25 is composed of a plate-like member whose one end is fixed to the bent portion 6b of the upper frame 6 and whose other end is bent so as to have a surface facing the sensor unit 26.

Meanwhile, the sensor unit 26 is supported in a cantilever manner by a fixed part 26a that is fixed between the pulley support part 22 and the cage-top vibration isolator rubber 24, and is positioned opposite the detection plate 25. The detection plate 25 and the sensor unit 26 are positioned so as to be separated by a predetermined gap.

In this embodiment, the load of the car 40 is applied to the car-top vibration-proof rubber 24, so that the load of the car 29 increases, causing the car-top vibration-proof rubber 24 to bend. This bending causes the distance between the detection plate 25 and the sensor unit 26 to change. In the load sensor device 27, the sensor unit 26 detects the distance to the detection plate 25, thereby detecting the load applied to the car 40.

However, in the case of a high-speed elevator with a large load, in order to support a larger mass, the car-mounted anti-vibration rubber 24 needs to be increased in size to increase the spring constant and be arranged more closely together. In this embodiment, the load sensor device 27 is not placed between adjacent car-mounted anti-vibration rubbers 24, but is placed on the outside of the car-mounted anti-vibration rubber 24, opposite the car-mounted pulley 30. Therefore, since the load sensor device 27 does not restrict the placement position of the car-mounted anti-vibration rubber 24, the car-mounted anti-vibration rubber 24 can be arranged more closely together.

In this embodiment, the load sensor device 27 is provided in two locations, but this is not limited to the above. Depending on the size of the elevator, one location may be used, and the specifications can be modified in various ways. By providing two locations as in this embodiment, the accuracy of load detection can be maintained even in high-speed elevators with large loads.

[Over-basket pulley cover]
3A and 3B , the car pulley cover 20 is configured in a box shape that covers the entire car pulley 30 below the upper frame 6 in the vertical direction. The width of the car pulley cover 20 in the axial direction of the rotation shaft of the car pulley 30 is set to a width that can cover an area including the load sensor device 27. Therefore, the car pulley cover 20 covers an area including the car pulley 30, the pulley support portion 22, the car vibration isolating rubber 24, and the load sensor device 27.

Although not shown, the car pulley cover 20 is fixed to the upper frame 6 by multiple bolts. Furthermore, although not shown, the car pulley cover 20 is configured to cover the upper surface portion of the car pulley 30 in the vertical direction, except for the portion through which the main rope 13 passes. Although not shown, a soundproofing member is provided on the inner peripheral surface of the car pulley cover 20. This makes it possible to suppress the sound generated by the rotation of the car pulley 30.

In addition, an inspection window 21 is provided at the position of the car pulley cover 20 where the load sensor device 27 is provided. That is, in this embodiment, the car pulley cover 20 has inspection windows 21 at two locations on either side of the rotating surface of the car pulley 30. The inspection windows 21 are composed of an opening 21a provided at a position corresponding to the load sensor device 27 of the car pulley cover 20, and a lid portion 21b that covers the opening 21a except during inspection. The inspection window 21 is used when an operator inspects the load sensor device 27 arranged inside the car pulley cover 20.

Figure 4 is a schematic diagram of the load sensor device 27 when the lid 21b is removed from the inspection window 21 during inspection. As shown in Figure 4, in this embodiment, when inspecting the load sensor device 27, the lid 21b can be removed from the inspection window 21 to inspect and repair the load sensor device 27. Therefore, the opening 21a only needs to be configured to be large enough for an operator to inspect the load sensor device 27.

The lid portion 21b is made of a plate-like member having an area larger than the area of the opening 21a of the inspection window 21, and is fixed at its four corners to the cage pulley cover 20 with screw members 40, such as bolts. Although not shown here, the screw holes for fixing the lid portion 21b are potbellied holes, and the lid portion 21b can be removed from the opening 21a by loosening the screw members 40. Therefore, when removing the lid portion 21b, the worker does not need to completely remove the screw members 40.

In the passenger car 40 having an on-car pulley 30, as in this embodiment, it is necessary to attach a soundproof on-car pulley cover 20 to the on-car pulley 30 to deal with noise. On the other hand, the load sensor device 27 requires regular maintenance because the gap between the detection plate 25 and the sensor unit 26 changes as the on-car vibration isolator rubber 24 deteriorates over time. In contrast, in this embodiment, an inspection window 21 is provided in the on-car pulley cover 20, so even if the load sensor device 27 is arranged near the on-car pulley 30, the load sensor device 27 can be inspected and repaired without removing the on-car pulley cover 20.

As described above, in the car 40 of the elevator 1 of this embodiment, the load sensor device 27 is provided near the car pulley 30, not under the floor. As a result, the car load detection method of this embodiment is not affected by floor deflection due to the loading position of passengers, etc., even in a heavily loaded elevator, compared to the conventional underfloor load detection method.

Furthermore, in conventional underfloor load detection methods, in the case of elevators with heavy loads, it was necessary to place four or more load sensor devices under the floor to take into account the effects of floor deflection. In contrast, in this embodiment, even in elevators with heavy loads, the load can be detected with high accuracy by installing two load sensor devices 27 at diagonal positions relative to the rotation axis of the car pulley 30. Therefore, the car load detection method of this embodiment can reduce costs compared to conventional underfloor load detection methods.

In addition, in this embodiment, the load sensor device 27 is placed not between the car-top vibration isolation rubbers 24, but on the outside of the car-top vibration isolation rubbers 24, opposite the car-top pulley 30 side. This allows the load sensor device 27 to not limit the placement area of the car-top vibration isolation rubbers 24, and makes maximum use of the area between the pulley support portion 22 and the upper frame 6 as the placement area for the car-top vibration isolation rubbers 24.

However, the working space above the car is narrow, and when the car-top pulley cover 20 is removed, it is difficult to secure space to place the car-top pulley cover 20. In addition, the car-top pulley cover 20, which has soundproofing properties, is heavy, so when removing the car-top pulley cover 20, two or more people are required for the inspection work.

In contrast, in this embodiment, the car-mounted pulley cover 20 is provided with an inspection window 21 for inspecting the load sensor device 27. This eliminates the need to remove the car-mounted pulley cover 20 when inspecting or repairing the load sensor device 27. This reduces the number of work steps and minimizes the number of workers required.

The above-mentioned embodiment has been described in detail to clearly explain the present invention, and is not necessarily limited to having all of the configurations described. For example, it is possible to replace part of the configuration of the embodiment with another configuration, and it is also possible to add another configuration to the configuration of the embodiment. Also, it is possible to add, delete, or replace part of the configuration of the embodiment with another configuration.

1...Elevator, 2...Hoistway, 3...Car body, 4...Cage door, 5...Cage frame, 6...Upper frame, 7...Vertical frame, 8...Lower frame, 9...Cage floor, 10...Under-car vibration-proof rubber, 12...Guide roller, 13...Main rope, 14...Compensation bracket, 15...Tail cord beam, 16...Compensation suspension plate, 17...Compensation rope, 18...Tail cord, 20...Over-car pulley cover, 21...Inspection window, 21a...Opening, 21b...Cover, 22...Pulley support, 24...Over-car vibration-proof rubber, 25...Detection plate, 26...Sensor, 26a...Fixed part, 27...Load sensor device, 30...Over-car pulley, 31...Pulley shaft

Claims (6)

The car body for carrying passengers and luggage,
A cage frame that supports a cage body;
a car upper pulley attached to the car frame at an upper portion of the car body and around which a main rope is wound;
A pulley support portion that rotatably supports the car pulley;
Two load sensor devices provided between the car frame and the pulley support portion;
an on-car pulley cover attached to the car frame so as to cover the on-car pulley in an area including the two load sensor devices, the on-car pulley cover having an inspection window used when inspecting the load sensor devices ,
The two load sensor devices are provided at positions corresponding to diagonal positions with respect to a central axis of the car pulley,
The inspection windows are formed in two locations on the cage pulley cover, sandwiching the rotation surface of the cage pulley.
Elevator car. 2. The elevator car of claim 1, wherein the inspection window is composed of an opening provided to allow inspection of the load sensor device and a lid portion covering the opening, the lid portion being positioned to cover the opening and fixed to the car-mounted pulley cover. The lid portion is fixed to the cage pulley cover by a screw member,
The elevator car according to claim 2 , wherein the cover portion is provided with a potbelt hole through which the screw member is inserted. an upper vibration isolating rubber is provided between the car frame and the pulley support portion, and the pulley support portion is supported by the car frame via the upper vibration isolating rubber;
2. The elevator car according to claim 1, wherein the load sensor device is provided on a side of the car-mounted vibration isolating rubber opposite to a side of the car-mounted pulley. 2. The elevator car according to claim 1, wherein a soundproofing material is provided on a surface of the car upper pulley cover facing the car upper pulley. The car body for carrying passengers and luggage,
A cage frame that supports a cage body;
a car upper pulley attached to the car frame at an upper portion of the car body and around which a main rope is wound;
A pulley support portion that rotatably supports the car pulley;
Two load sensor devices provided between the car frame and the pulley support portion;
a car-mounted pulley cover attached to the car frame so as to cover the car-mounted pulley in an area including the two load sensor devices, the car-mounted pulley cover having an inspection window for use in inspecting the load sensor devices ,
The two load sensor devices are provided at positions corresponding to diagonal positions with respect to a central axis of the car pulley,
The inspection windows are formed in two locations on the cage pulley cover, sandwiching the rotation surface of the cage pulley.
Elevator.

Images