Car and elevator of an elevator

Abstract

The present application provides a car of an elevator and an elevator, which can maintain the precision of load detection and ensure the workability during maintenance. The car of the load sensor device includes a spring unit having a plurality of springs configured to be extendable between a pulley support portion and an upper frame, and a fall prevention member provided between the upper frame and the pulley support portion in a manner allowing the pulley support portion to move in a direction approaching the upper frame and restricting the pulley support portion to move in a direction away from the upper frame.

Description

TECHNICAL FIELD

[0001] The present application relates to a car of an elevator, and an elevator. BACKGROUND

[0002] In the related art, an elevator having a load sensor that detects a load of a car is known. In Patent Literature 1, a structure is disclosed in which a load of a car is detected by measuring a displacement of a suspension spring and a vibration isolation rubber provided on an upper frame side of a car frame that supports the car.

[0003] In Patent Literature 1, a main sling supports the upper frame, and thereby receives all of the load applied to the car. In such a structure, the load of the car is detected by mounting a suspension spring on an end portion of the main sling fixed through the upper frame, and measuring a displacement of the suspension spring.

[0004] In addition, in Patent Literature 1, in the case of a structure in which the main sling receives all of the load applied to the car via a car sheave provided on the car, a car sheave frame that supports the car sheave is mounted to the upper frame of the car frame with the vibration isolation rubber interposed therebetween. Then, the load of the car is detected by measuring a deflection of the vibration isolation rubber.

[0005] PRIOR ART DOCUMENTS

[0006] PATENT LITERATURE

[0007] Patent Literature 1: Japanese Patent Application Laid-Open No. 2009-220912 SUMMARY

[0008] PROBLEMS TO BE SOLVED BY THE INVENTION

[0009] However, in a high-speed elevator having a large load, the load in the car is large, and the lift stroke is large, and therefore the mass of the tail rope and the compensating rope is also large. Furthermore, because the self weight of the car of the elevator is large, the load applied to the elastic member such as the spring and the vibration isolation rubber mounted for detecting the load is large. Therefore, it is necessary to select an elastic member that can withstand the load. Therefore, it is considered to use a large spring as the elastic member, or to increase the number of springs and vibration isolation rubbers, so that the load detecting device becomes a structure that can withstand a large load.

[0010] However, the space of the upper portion of the car is limited, and therefore it is difficult to use a large spring. In addition, in the case of increasing the number of springs, it is difficult to position the springs at the time of maintenance such as replacement of the springs or addition of a sheave or the like on the car, and there is a problem that the work efficiency is reduced.

[0011] On the other hand, the vibration-isolating rubber has a memory effect (hysteresis) due to a load received and is likely to have a non-linear property and a deterioration effect. Therefore, in a case where the vibration-isolating rubber is used in the load detecting device, there is a problem that it is difficult to make the detection value the same every time even in a state where the same load is applied to the vibration-isolating rubber.

[0012] Therefore, the present application aims to provide an elevator car and an elevator capable of maintaining the accuracy of load detection and ensuring workability at the time of maintenance.

[0013] Technical solution for solving the problem

[0014] To solve the above problem and achieve the object, the elevator car of the present application includes: a car body that carries passengers and cargo; a car upper sheave that can wind a main hoisting rope at an upper portion of the car body; and a pair of sheave support portions that are provided at positions apart from the car upper sheave in a direction orthogonal to a rotation surface of the car upper sheave, and rotatably support the car upper sheave. Further, it has a pair of upper frames that support the car body; and a car upper spring structure that is arranged between the upper frames and the sheave support portions. The car upper spring structure has: a spring unit that has a plurality of springs arranged so as to be extendable and contractible between the sheave support portions and the upper frames; and a fall prevention member that is provided between the upper frames and the sheave support portions in a manner that allows the sheave support portions to move in a direction approaching the upper frames and restricts the sheave support portions from moving in a direction away from the upper frames.

[0015] The elevator of the present application has the above-described car.

[0016] Effects of the invention

[0017] According to the present application, it is possible to maintain the accuracy of load detection and ensure workability at the time of maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic configuration view that shows a configuration example of the elevator car of the first embodiment of the present application.

[0019] Figure 2 A of is a schematic configuration view that shows a main portion including the car upper sheave 20, as viewed from the front in the car 40 of the present embodiment, Figure 2 B of is a schematic configuration view that shows a main portion including the car upper sheave 20, as viewed from the side in the car 40.

[0020] Figure 3 A of is a view that enlarges a portion of the spring unit 30 of the present embodiment, Figure 3 B of is a cross-sectional view along Figure 3 A of is a cross-sectional view along Figure 3 C of is a cross-sectional view along Figure 3A cross-sectional view of line bb of A.

[0021] Figure 4 This is a simplified structural diagram showing the anti-fall rod 31 enlarged.

[0022] Figure 5 A is a schematic structural diagram of the main parts including the upper pulley 20 of the car 40 in the second embodiment of the present invention, viewed from the front. Figure 5 B is a schematic structural diagram of the main parts, including the upper pulley 20 of the car, viewed from the side in the car 40.

[0023] Figure 6 A and Figure 6 B is a schematic structural diagram of the car in the comparative example. Detailed Implementation

[0024] Hereinafter, an example of an elevator car and elevator according to an embodiment of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the following example. In the figures described below, common components are labeled with the same reference numerals.

[0025] First Implementation Method

[0026] 1. The structure of the elevator car

[0027] First, regarding the elevator and car of the first embodiment of the present invention (hereinafter referred to as "this embodiment"), refer to... Figure 1 Please provide an explanation. Figure 1 This is a schematic structural diagram illustrating an example of the structure of elevator 1 in this embodiment.

[0028] like Figure 1 As shown, the elevator 1 of this embodiment is installed in a shaft 2 formed within a building structure. The elevator 1 includes a car 40 that moves up and down within the shaft 2 to carry people and goods, and a main hoist 13. Hereinafter, the direction in which the car 40 moves up and down will be described as the vertical direction.

[0029] [Well passage]

[0030] The hoistway 2 is the space for the lifting and lowering of the car 40, and it is designed to run vertically through all floors inside the building. Guide rails (not shown) are installed on the inner wall of the hoistway 2 to guide the lifting and lowering of the car 40. Additionally, landing doors (not shown) are installed on the wall of the hoistway 2 at corresponding heights to each floor.

[0031] [Elevator Car]

[0032] The car 40 is connected to a counterweight (not shown) via a main hoist 13 and moves up and down within the hoistway 2. The car 40 is guided by guide rails (not shown) installed on the walls of the hoistway 2, moving vertically within the hoistway 2. As described later, a car door 4 is located at the front of the car body 3, corresponding to the landing door. When the car stops at each floor, the car door 4 and the landing door open, allowing passengers or goods to board and alight from the car 40. The car 40 will be described in detail later.

[0033] [Main Sling]

[0034] Regarding the main hoisting cable 13, its middle portion is wound around the upper pulley 20 of the car 40 (see reference). Figure 2 On A), and connected to the traction machine and counterweight (not shown). The main sling 13 is lifted by the traction machine (not shown), thereby causing the car 40 to rise and fall.

[0035] 2. Car

[0036] Next, the car 40 of this embodiment will be described. The car 40 of this embodiment includes a car body 3, a car frame 5, a pulley support 22, and an upper car pulley 20. Additionally, the car 40 includes an upper car spring structure 24 and a load sensor device 27. In the following description, the lifting direction of the car 40 will be referred to as the vertical direction, the horizontal direction of the car 40, i.e., the direction orthogonal to the rotation axis of the upper car pulley 20, will be referred to as the horizontal direction, and the direction along the rotation axis of the upper car pulley 20 will be referred to as the front-back direction.

[0037] Figure 2 A is a schematic structural diagram of the main parts, including the upper pulley 20 of the car, viewed from the front in the car 40 of this embodiment. Figure 2 B is a schematic structural diagram of the main parts, including the upper pulley 20 of the car, viewed from the side in the car 40.

[0038] [Car Body]

[0039] The main body of the car 3 is formed in a hollow, roughly rectangular shape, such as... Figure 1 As shown, it consists of a car floor 9, a top plate, and a side wall between the car floor 9 and the top plate. A car door 4 is provided in front of the car body 3, which is opposite to the landing door of the hoistway 2.

[0040] [Car frame]

[0041] The car frame 5 consists of an upper frame 6, a lower frame 8, and longitudinal frames 7, supporting the car body 3 inside the car frame 5. The lower frame 8 is located on the lower side of the car 40 in the vertical direction, supporting the compensation bracket 14. A tail cable beam 15 and a compensation suspension plate 16 are fixed to the compensation bracket 14. A tail cable 18 is fixed to the tail cable beam 15, and a compensation rope 17 is suspended from the compensation suspension plate 16. In addition, a floor under-base 11 is provided on the car 40 side of the lower frame 8. A plurality of car under-base vibration damping rubbers 10 are arranged between the floor under-base 11 and the car floor 9. The car under-base vibration damping rubbers 10 are made of elastic components with a specified elastic coefficient.

[0042] The longitudinal frame 7 is composed of components extending in the lifting direction and is provided on two sides of the car 40 adjacent to the surface where the car door 4 is provided. The longitudinal frame 7 is connected to the upper frame 6 and the lower frame 8, and guide rollers 12 that slide on guide rails within the hoistway 2 are provided at both ends of the car 40 in the vertical direction.

[0043] The upper frame 6 is positioned on the upper side of the car 40 in the vertical direction and is composed of a beam-shaped member extending in the left-right direction, orthogonal to the vertical direction (i.e., the direction of the car upper pulley 20 described later). It is fixed between two opposing longitudinal frames 7, 7. Furthermore, in this embodiment, as... Figure 2 As shown in B, a pair of upper frames 6 are arranged such that they sandwich the upper end of the car upper pulley 20 in the front-rear direction. The upper frame 6 is composed of a U-shaped component with an upper bent portion 6a and a lower bent portion 6b, which are bent at right angles to the opposite side of the side where the car upper pulley 20 is located in the vertical direction. The lower surface of the lower bent portion 6b in the vertical direction on the pulley support portion 22 side is the mounting surface of the spring unit 30, which will be described later.

[0044] Furthermore, in the front-rear direction of the upper pulley 20, at the position opposite to the installation position of the spring unit 30 on the lower side bend 6b of the upper frame 6, a plurality of upper through holes (not shown) are provided in the left-right direction orthogonal to the vertical direction of the upper frame 6. These upper through holes are for the anti-fall rod 31 (equivalent to the anti-fall component of the present invention) to be inserted.

[0045] Furthermore, at the two end faces of each upper frame 6 in the left-right direction orthogonal to the vertical direction, a pair of upper frame brackets 25, 25 connecting the pair of upper frames 6, 6 are fixed with bolts (not shown). The upper frame bracket 25 is constructed of a box-shaped component consisting of a rectangular main surface 25a extending in the direction of the rotation axis of the car upper pulley 20 and side surface portions 25b provided in a manner that surrounds the four sides of the main surface 25a. The upper frame bracket 25 is fixed between the pair of upper frames 6, 6 by means of bolting or other methods to the opposite side surface portions 25b in the direction of the rotation axis of the car upper pulley 20.

[0046] Furthermore, the side portion 25b of the upper frame bracket 25 facing the car 40 is used as a mounting piece for the detection plate 28 of the load sensor device 27, which will be described later. In this embodiment, the upper frame bracket 25 is constructed as a box-shaped component consisting of a main portion 25a and a side portion 25b arranged to surround the main portion 25a, thereby maintaining the rigidity and strength required for the upper frame bracket 25.

[0047] Furthermore, the shape of the upper frame bracket 25 can be varied as long as it is a component that can be fixed between a pair of upper frames 6, 6 and can fix the detection plate 28 of the load sensor device 27. By constructing it as a box-shaped component as shown in this embodiment, the upper frame bracket 25 can be made lightweight while maintaining rigidity and strength.

[0048] [Car pulley]

[0049] The upper car pulley 20 is a cylindrical component with the main hoisting cable 13 wound around it, and is located on the upper side of the car body 3 in the vertical direction. The upper car pulley 20 is rotatably supported by a pulley shaft 20a provided at the center of the rotating surface and is attached to a pulley support 22, which will be described later. In the following description, the direction orthogonal to the vertical direction and the direction of the rotation axis of the upper car pulley 20 is referred to as the left-right direction.

[0050] [Pulley support section]

[0051] The pulley support 22 is composed of a plate-shaped member with a diameter longer than that of the car upper pulley 20. In this embodiment, a pair of pulley supports 22 are arranged such that they clamp the car upper pulley 20 in the direction along the rotation axis of the car upper pulley 20. The pulley support 22 is composed of a U-shaped member having an upper bent portion 22a and a lower bent portion 22b, which are bent at right angles to the opposite side of the side where the car upper pulley 20 is located in the vertical direction. The upper surface of the upper frame 6 side of the upper bent portion 22a is the mounting surface of the spring unit 30, which will be described later.

[0052] The pulley shaft 20a is supported between a pair of pulley support portions 22 that sandwich the upper pulley 20 of the car, and the upper pulley 20 of the car is rotatably supported by the pulley shaft 20a. In addition, at the two end faces of each pulley support portion 22 in the left-right direction orthogonal to the vertical direction, a pair of pulley support portion brackets 23, 23 connecting the pair of pulley support portions 22 are respectively fixed with bolts (not shown).

[0053] The pulley support bracket 23 is a box-shaped component consisting of a rectangular main surface 23a extending in the direction of the rotation axis of the pulley 20 on the car, and side surfaces 23b erected from the main surface 23a to surround its four sides. The pulley support bracket 23 is fixed between the pulley supports 22 by means of bolts or the like, which fix the side surfaces 23b, which are arranged opposite each other in the direction of the rotation axis of the pulley 20 on the car.

[0054] Furthermore, the side portion 23b facing the upper frame 6 among the plurality of side portions 23b is used as a mounting piece for the sensor portion 26 of the load sensor device 27, which will be described later. In this embodiment, the pulley support bracket 23, like the upper frame bracket 25, is constructed of a box-shaped member consisting of a main face portion 23a and side portions 23b arranged to surround the main face portion 23a, thereby maintaining the rigidity and strength required for the pulley support bracket 23.

[0055] Furthermore, the shape of the pulley support bracket 23 can be varied as long as it is a component that can be fixed between a pair of pulley supports 22 and can fix the sensor part 26 of the load sensor device 27. By constructing it as a box-shaped component as shown in this embodiment, the pulley support bracket 23 can be made lightweight while maintaining rigidity and strength. The pair of pulley supports 22 that hold the pulleys 20 on the car are integrated using this pulley support bracket 23.

[0056] In addition, such as Figure 2 As shown in B, the pulley support 22 has two bent portions 22a and 22b, which are bent at right angles to the opposite side of the side on which the car pulley 20 is disposed, at both ends of the pulley support 22 in the vertical direction. On one side (one side) of the rotating surface of the car pulley 20 and on the other side (the other side), between the bent portion 22a above the pulley support 22 and the bent portion 6b below the upper frame 6 in the vertical direction, a car upper spring structure 24 is disposed.

[0057] [Spring structure on the car]

[0058] The car upper spring structure 24 consists of multiple (eight in this embodiment) spring units 30 and multiple (four in this embodiment) anti-fall bars 31. In this embodiment, four spring units 30 are provided on each side of the car upper pulley 20 along the direction of rotation axis of the car upper pulley 20.

[0059] Figure 3 Figure A is an enlarged view of a portion of the spring unit 30 in this embodiment. Figure 3 B is along Figure 3 A cross-sectional view of line aa of A. Figure 3 C is along Figure 3 A cross-sectional view of line bb of A. (See diagram below.) Figure 3 As shown in A, the spring unit 30 is composed of an upper fixing plate 33, a lower fixing plate 34, and multiple springs 35 (three in this embodiment).

[0060] The upper fixing plate 33 is a rectangular plate-shaped component capable of accommodating spring seats 36 corresponding to the three springs 35. The upper fixing plate 33 is fixed to the lower surface of the lower bend 6b of the upper frame 6 via bolts 37 through the spring seats 36. Three spring seats 36 fixed to the upper fixing plate 33 are arranged along the extending direction of the upper frame 6, and each of the three spring seats 36 is fixed by bolts 37.

[0061] The lower fixing plate 34 is a rectangular plate-shaped component capable of accommodating spring seats 38 corresponding to the three springs 35. The lower fixing plate 34 is configured such that its length, perpendicular to the arrangement direction of the spring seats 38 and parallel to the rotation axis along the upper pulley 20 of the car, is longer than that of the upper fixing plate 33. The lower fixing plate 34 and the upper fixing plate 33 are disposed opposite each other on the upper surface of the upper bend 22a of the pulley support 22, opposite to the upper frame 6. The lower fixing plate 34 is fixed from the upper frame 6 side by bolts 39 via the spring seats 38. Three spring seats 38 disposed on the lower fixing plate 34 are arranged opposite to the spring seats 36 fixed to the upper fixing plate 33, and each is fixed by bolts 39.

[0062] Furthermore, a plurality of lower through holes 49 are provided on the lower fixing plate 34, parallel to the direction in which the spring seat 38 is provided, for the anti-falling rod 31 described later to be inserted. In this embodiment, the lower through holes 49 are formed at the end of the lower fixing plate 34 in the front-rear direction on the side opposite to the car upper pulley side. Therefore, when the lower fixing plate 34 is placed on the pulley support 22, the lower through holes 49 protrude from the upper bend 22a in the pulley support 22 towards the side opposite to the car upper pulley 20 side. In addition, the lower through holes 49 provided in the lower fixing plate 34 coincide with the upper through holes provided in the lower bend 6b of the upper frame 6 in the vertical direction.

[0063] Multiple springs 35, each made of metal wire, are disposed between an upper fixing plate 33 and a lower fixing plate 34, abutting against an upper spring seat 36 and a lower spring seat 38 arranged opposite each other in the vertical direction. In this embodiment, each upper spring seat 36 and each lower spring seat 38 is fixed by bolts 37 and 39, respectively, and each bolt 37 and 39 is configured as a protrusion protruding between the upper fixing plate 33 and the lower fixing plate 34. Each spring 35 is arranged in the vertical direction such that it is embedded in the bolts 37 and 39, which are protrusions, and is configured to abut against the upper spring seat 36 and the lower spring seat 38. Thus, the spring 35 is restricted from moving in the front-back direction by the bolts 37 and 39. Therefore, as long as the distance between the upper fixing plate 33 and the lower fixing plate 34 is not greater than the natural length of the spring 35, the spring 35 will not fall off in the front-back direction.

[0064] In this embodiment, three springs are arranged in one spring unit 30. Additionally, in this embodiment, four spring units 30 are arranged in the front-rear direction of the car pulley 20.

[0065] Figure 4 This is a simplified structural diagram showing the anti-fall rod 31 enlarged. (See diagram for example.) Figure 4 As shown, the anti-fall rod 31 is composed of a rod-shaped component that extends from the upper through hole to the lower through hole 49. Threads 31a are provided on the upper and lower ends of the anti-fall rod 31 in the vertical direction. Nuts 32a and 32b (described later) are fixed to the portions with threads 31a. Figure 2 (B) In this embodiment, as Figure 4 As shown, the central portion 31b between the threads 31a and 31a at the upper and lower ends is not threaded, but it can also be a structure in which threads are provided throughout.

[0066] Anti-fall bar 31 Figure 2 As shown in B, the upper surface of the lower bent portion 6b of the upper frame 6 is secured by nut 32a. Figure 2 The anti-fall bar 31 is fixed by a double nut (B in the diagram), and is also fixed by a nut 32b on the lower surface of the upper bent portion 22a of the pulley support portion 22. Thus, the anti-fall bar 31 is fixed to the upper frame 6 and the pulley support portion 22, preventing the upper frame 6 and the pulley support portion 22 from moving away from each other from their fixed positions. On the other hand, since the anti-fall bar is not fixed between the upper frame 6 and the pulley support portion 22 by nuts or the like, it does not restrict the upper frame 6 and the pulley support portion 22 from moving closer together.

[0067] Furthermore, the length of the anti-fall bar 31 in the downward direction from the upper bend 22a of the pulley support 22 is set to a length that will not detach when the upper frame 6 is separated from the pulley support 22 during maintenance to the extent that the spring 35 can be removed from the spring unit 30. Additionally, the anti-fall bar 31 is provided at two locations on each side of the rotation axis in the front-rear direction of the car upper pulley 20.

[0068] The upper spring structure 24 of the car supports not only the weight of the car body 3, but also the load mass, the suspension mass of the compensating cable 17 and the tail cable 18. That is, the entire load of the car 40 suspended by the main sling 13 is applied to the upper spring structure 24 of the car. Therefore, the size and number of each spring 35 in the upper spring structure 24 of the car are set to be able to withstand the load.

[0069] [Load sensor device]

[0070] The load sensor device 27 is a device for detecting the load applied to the car 40, and is installed in the space between the upper frame support 25 and the pulley support bracket 23. In this embodiment, the load sensor device 27 is installed at two positions along the direction of rotation of the upper pulley 20, sandwiching the upper pulley. When viewed from above, it is installed on a diagonal line passing through the center of the upper pulley 20. Here, "diagonal line" refers to the diagonal of a quadrilateral formed by two sides parallel to the extending direction of the upper frame 6 and two sides parallel to the extending direction of the upper frame support 25 when viewed from above. That is, in this embodiment, when viewing the upper pulley 20 from the front, for example, with the central axis of the upper pulley 20 as the center, one load sensor device 27 is installed on the right rear, and the other load sensor device is installed on the left near side (left front).

[0071] The load sensor device 27 consists of a detection plate 28 made of a plate-shaped component and a sensor part 26 for detecting the position of the detection plate 28. The detection plate 28 is a plate-shaped component that is bent so that one end is fixed to the lower side of the upper frame bracket 25 in the vertical direction, and the other end has a surface opposite to the sensor part 26.

[0072] On the other hand, the sensor unit 26 is cantilevered by fixing parts 26a and 26b that are fixed to the upper side part 23b of the pulley support bracket 23 in the vertical direction, and is positioned opposite to the detection plate 28. The detection plate 28 and the sensor unit 26 are separated by a predetermined gap.

[0073] In this embodiment, the load of the car 40 is applied to the upper frame 6. As the load of the car 40 increases, the springs 35 of the upper spring structure 24, which is located between the upper frame 6 and the pulley support 22, shorten. As the springs 35 shorten, the distance between the detection plate 28 and the sensor unit 26 changes. In the load sensor device 27, the sensor unit 26 detects the distance to the detection plate 28, thereby enabling the detection of the load applied to the car 40.

[0074] 3. The effects achieved by the structure of the car in this embodiment.

[0075] As described above, in the case of high-speed elevators with large load capacities, in order to support the greater mass, the vibration damping components (elastic components) installed on the car need to have larger dimensions, thus increasing the spring constant, or be arranged more densely. In this embodiment, by providing an anti-fall bar 31 to prevent the springs 35 from falling, more springs 35 can be arranged densely. Therefore, space savings can be achieved compared to using large springs. Hereinafter, the structure of a comparative example car is shown to explain the effects achieved by the structure of the car in this embodiment.

[0076] Figure 6 A and Figure 6 B is a schematic structural diagram of the car in the comparative example. Figure 6 A and Figure 6 The car shown in B is without any... Figure 2 A and Figure 2 The anti-fall bar 31, as indicated in B, differs from the first embodiment. Figure 6 A and Figure 6 In B, respectively for and Figure 2 A and Figure 2 The parts corresponding to B are labeled with the same reference numerals as those in the attached figures, and repeated descriptions are omitted.

[0077] like Figure 6 A and Figure 6 As shown in the comparative example B, the car upper spring structure 54 has a pulley support 22 that is pulled upwards towards the frame 6 via multiple spring units 30. Among the spring units 30, such as... Figure 3 As shown in the enlarged view of A, each spring 35 is embedded between the bolts 37 of the upper fixing plate 33 and the bolts 39 of the lower fixing plate 34, but is not fixed to the upper fixing plate 33 and the lower fixing plate 34. Furthermore, because the design involves shortening each spring 35 as the load on the car 40 increases, the distance between the upper frame 6 and the pulley support 22 needs to be variable. Therefore, it is not possible to... Figure 3 The bolts 37 and 39 shown in Figure A are connected. Therefore, when the upper frame 6 is separated from the pulley support 22 by more than the natural length of the spring 35, there is a risk of it falling in the forward or backward direction.

[0078] Therefore, in the structure shown in the comparative example, if the distance between the upper frame 6 and the pulley support 22 increases due to unexpected vibrations, there is a risk that the spring 35 may fall. Furthermore, during maintenance, if the pulley support 22 is moved away from the upper frame 6 to replace the spring 35 or to maintain the car pulley 20, mutual positioning is required when lifting the pulley support 22 back towards the upper frame 6. Therefore, replacing the spring 35 and maintaining the car pulley 20 cannot be performed easily. Especially when there are many springs 35 in the car spring structure 54, positioning the upper frame (fixed to the upper fixing plate 33) and the pulley support 22 (fixed to the lower fixing plate 34) becomes difficult.

[0079] In contrast, in this embodiment, the car upper spring structure 24 has an anti-fall bar 31 that allows movement in the direction that shortens the distance between the upper frame 6 and the pulley support 22, but restricts movement in the direction that moves away. Therefore, even if the upper frame 6 and the pulley support 22 move in the direction of separation due to unexpected vibrations, the positions of the upper frame 6 and the pulley support 22 can be maintained at their initial set positions, thus preventing the spring 35 from falling.

[0080] Furthermore, in this embodiment, during maintenance, with the anti-fall bar 31 inserted into the upper and lower through holes 49, the lower nut 32b can be offset downwards and fixed, for example, to separate the upper frame 6 from the pulley support 22. That is, with the anti-fall bar 31 inserted into the upper and lower through holes 49, the upper frame 6 can be separated from the pulley support 22 by a distance. Therefore, the anti-fall bar 31 can maintain the positional relationship between the upper frame 6 and the pulley support 22 in the vertical direction, making it easier to return the upper frame 6 and the pulley support 22 to their original positions. This facilitates maintenance of the car upper pulley 20 and replacement of the spring 35.

[0081] Thus, in this embodiment, the structure has the effect of making it easy to replace the springs 35, even when a car upper spring structure 24 with a large number of springs 35 arranged between the upper frame 6 and the pulley support 22 is used to withstand the load of a large-capacity car 40.

[0082] Alternatively, vibration-damping rubber can be considered as an elastic component in the load sensor device 27. However, as mentioned above, when vibration-damping rubber is used, a memory effect (hysteresis) occurs between the load it bears and the displacement of the vibration-damping rubber, and it is prone to nonlinearity and degradation. In contrast, the car spring structure 24 of this embodiment uses a spring structure made of metal wire, which is less susceptible to nonlinearity and degradation, and can maintain the accuracy of load detection.

[0083] Furthermore, in this embodiment, an upper through hole is provided in the upper bend 6a of the upper frame 6, and a lower through hole 49 is provided in the lower fixing plate 34, but this is not a limitation. The upper through hole can be any component integrally mounted to the upper frame 6, for example, it can be provided in the upper fixing plate. On the other hand, the lower through hole 49 can be any component integrally mounted to the pulley support 22, for example, it can be provided in the pulley support 22 itself. In this case, the width of the upper bend 22a of the pulley support 22 in the front-rear direction is increased, and the lower through hole is provided at an appropriate position.

[0084] Second Implementation Method

[0085] Next, the elevator car according to the second embodiment of the present invention will be described. Figure 5 A is a schematic structural diagram of the main parts including the upper pulley 20 of the car 40 in the second embodiment of the present invention, viewed from the front. Figure 5 Figure B is a schematic structural diagram of the main parts, including the upper pulley 20 of the car, viewed from the side inside the car 40. In the second embodiment, a fall-prevention bend plate 41 is used instead of the fall-prevention bar 31 in the first embodiment, which differs from the first embodiment. Other structures are the same as in the first embodiment, therefore... Figure 5 A and Figure 5 In B, for the case of... Figure 2 A and Figure 2 The parts corresponding to B are labeled with the same reference numerals as those in the attached figures, and repeated descriptions are omitted.

[0086] In this embodiment, the car upper spring structure 44 is composed of multiple spring units 30 and an anti-fall bending plate 41 (equivalent to the anti-fall component of the present invention). The anti-fall bending plate 41 is a bending plate that supports the upper frame 6 and the pulley support 22. It is a U-shaped bending plate formed by bending the upper end side and the lower end side towards the car upper pulley side. In this embodiment, the length of the anti-fall bending plate in the left-right direction is configured to be the same as the outer diameter of the spring 35, but it is not limited to this. In this embodiment, the anti-fall bending plate 41 is arranged at two locations on the front and rear sides of the car upper pulley 20, respectively, separated by a rotation axis.

[0087] The upper end bend 41a of the anti-fall bending plate 41 is fixed to the lower end bend 6b of the upper frame 6 by bolts (not shown in the figure). Furthermore, the lower end bend 41b of the anti-fall bending plate 41 is arranged to abut against the lower surface of the lower fixing plate 34 constituting the spring unit 30 in the vertical direction. However, the lower end bend 41b of the anti-fall bending plate 41 is not fixed to the lower fixing plate 34. Therefore, the anti-fall bending plate 41 does not hinder the movement of the pulley support 22 towards the upper frame 6 as the load on the car 40 increases.

[0088] Therefore, in the second embodiment, when the load on the car 40 increases, the upper frame 6 is pulled downwards and the pulley support 22 is pulled upwards, thus shortening each spring 35 of the spring structure 44 on the car. Therefore, by detecting the shortening of the springs 35 that occurs with the increase in the load on the car 40 using the load sensor device 27, the load can be detected.

[0089] In the second embodiment, the upper frame 6 and the pulley support 22 are also fixed by the anti-fall bending plate 41. Therefore, even if an unexpected vibration or other force acts in the direction that causes the upper frame 6 and the pulley support 22 to separate from the initial set position, the position of the upper frame 6 and the pulley support 22 can be maintained, thus preventing the spring 35 from disengaging.

[0090] Alternatively, if the anti-fall bending plate 41 of the second embodiment is used, it is not necessary to install it. Figure 3 The lower through hole 49 of the lower fixing plate 34 shown in C. Alternatively, it is also possible to use both the anti-fall bar 31 of the first embodiment and the anti-fall bending plate 41 of the second embodiment. In this case, the upper frame 6 and the pulley support 22 will not shift during maintenance, so the spring 35 can be easily replaced and repositioned.

[0091] The above embodiments have been described in detail for ease of understanding of the present invention and are not limited to having all the structures described. For example, a part of the structure of the embodiments can be replaced with other structures, and other structures can be added to the structure of the embodiments. In addition, for a part of the structure of the embodiments, other structures can be added, deleted, or replaced.

[0092] Explanation of reference numerals in the attached figures

[0093] 1...Elevator, 2...Shaft, 3...Car body, 4...Car door, 5...Car frame, 6...Upper frame, 7...Longitudinal frame, 8...Lower frame, 9...Car floor, 10...Car under-floor vibration damping rubber, 11...Base under floor, 12...Guide roller, 13...Main sling, 14...Compensation bracket, 15...Tail cable beam, 16...Compensation suspension plate, 17...Compensation rope, 18...Tail cable, 20...Car upper pulley, 20a...Pulley shaft, 22...Pulley support, 23... 24... Spring structure on the car, 25... Upper frame bracket, 26... Sensor unit, 27... Load sensor device, 28... Detection plate, 30... Spring unit, 31... Anti-fall rod, 31a... Thread, 31b... Central part, 32a, 32b... Nuts, 33... Upper fixing plate, 34... Lower fixing plate, 35... Spring, 36, 38... Spring seat, 37, 39... Bolt, 41... Anti-fall bending plate, 49... Lower through hole.

Claims

1. An elevator car, characterized in that, include: The main body of the car that carries passengers and goods; At the upper part of the car body, there is a car upper pulley capable of winding the main hoisting cable; A pair of pulley support portions are disposed at a position separated from the upper pulley in a direction orthogonal to the rotation plane of the upper pulley of the car, and rotatably support the upper pulley of the car; A pair of upper frames supporting the main body of the car; and The car's spring structure is disposed between the upper frame and the pulley support. The spring structure on the car has the following features: A spring unit having a plurality of springs telescopically arranged between the pulley support and the upper frame; and An anti-fall component is disposed between the upper frame and the pulley support in a manner that allows the pulley support to move toward the upper frame and restricts the pulley support to move away from the upper frame.

2. The elevator car as described in claim 1, characterized in that: The anti-fall component consists of an anti-fall rod inserted into an upper through hole on the upper frame side and into a lower through hole on the pulley support side.

3. The elevator car as described in claim 1, characterized in that: The anti-fall component is composed of a U-shaped bent plate with a pair of bent portions. One bent portion is fixed to the upper frame side, and the other bent portion supports the pulley support portion side in a manner that only restricts the movement of the pulley support portion away from the upper frame.

4. An elevator, characterized in that: It has a car, The elevator car includes: The main body of the car that carries passengers and goods; At the upper part of the car body, there is a car upper pulley capable of winding the main hoisting cable; A pair of pulley support portions are disposed at a position separated from the upper pulley in a direction orthogonal to the rotation plane of the upper pulley of the car, and rotatably support the upper pulley of the car; A pair of upper frames supporting the main body of the car; and The car's spring structure is disposed between the upper frame and the pulley support. The spring structure on the car has the following features: A spring unit having a plurality of springs telescopically arranged between the pulley support and the upper frame; and An anti-fall component is disposed between the upper frame and the pulley support in a manner that allows the pulley support to move toward the upper frame and restricts the pulley support to move away from the upper frame.

Images