Weighing device for an elevator

Abstract

The present disclosure aims to obtain a scale device of an elevator, which can share components with sensors for differences in rated carrying capacity, and accurately detect the load in the car. In the connecting arm (52), two or more wire connecting holes (52a) are arranged at intervals in the length direction of the connecting arm (52). And by selecting the wire connecting hole (52a) of the connecting detection wire (41) from the two or more wire connecting holes (52a), the distance from the rotation center of the rotating body (50) to the connecting position of the detection wire (41) and the rotating body (50) can be changed in stages.

Description

Technical Field

[0001] This disclosure relates to a weighing device for elevators. Background Technology

[0002] In conventional load detection devices, a sensor is fixed to a detection pulley. The detection pulley is connected to a rope end fixing part via a wire. Thus, the rotation of the detection pulley corresponds to the angle of the load inside the car. The sensor generates a signal corresponding to the rotation angle of the detection pulley. The control unit detects the load inside the car based on the signal from the sensor (for example, see Patent Document 1).

[0003] Existing technical documents

[0004] Patent Document 1: Japanese Patent No. 4137795

[0005] In conventional load detection devices as described above, there are upper and lower limits to the angle at which loads can be detected with high precision, depending on the sensor specifications. For example, in the case of a tilt sensor, the linear portion of the sine wave output by the sensor is required to detect the tilt angle, thus limiting the usable angle range. Furthermore, the amount of wire movement varies depending on the rated load capacity within the car. Therefore, different sized detection pulleys are required depending on the difference in rated load capacity. Summary of the Invention

[0006] This disclosure was made to solve the aforementioned problems, and its purpose is to provide an elevator weighing device that enables the use of sensor-equipped components to accommodate differences in rated load capacity and to detect the load inside the car with high accuracy.

[0007] The elevator weighing device disclosed herein includes: a frame; a rotating body rotatably mounted on the frame; a sensor mounted on the rotating body and generating a signal corresponding to the rotation angle of the rotating body; and a transmission mechanism having a detection wire connected to the rotating body and rotating the rotating body according to the load in the car, wherein the distance from the rotation center of the rotating body to the connection point where the detection wire connects to the rotating body can be varied.

[0008] Invention Effects

[0009] According to the elevator weighing device disclosed herein, the components equipped with sensors can be shared to accommodate differences in rated load capacity, and the load inside the car can be detected with high precision. Attached Figure Description

[0010] Figure 1 This is a schematic structural diagram of the elevator according to Embodiment 1.

[0011] Figure 2 It is shown Figure 1 The front view of the weighing device.

[0012] Figure 3 It is shown Figure 1 When the load inside the car is greater than the reference value Figure 2 The main view of the state of the weighing device.

[0013] Figure 4 It shows that Figure 2 The main view of the state after the connecting arm is replaced with another connecting arm.

[0014] Figure 5 This is a front view showing the weighing device of Embodiment 2.

[0015] Figure 6 This is a front view showing the weighing device of Embodiment 3.

[0016] Figure 7 This is a front view showing the weighing device of Embodiment 4.

[0017] Figure 8 This is a front view showing the weighing device of Embodiment 5.

[0018] Label Explanation

[0019] 19: First rope end fixing part; 30: Weighing device; 31: Frame; 32: Sensor; 33: Transmission mechanism; 44: Support shaft; 50: Rotating body; 51: Mounting component; 52: Connecting arm; 52a: Wire connecting hole (connection part); 53: Other connecting arms; 53a: Wire connecting hole (connection part). Detailed Implementation

[0020] The embodiments will now be described with reference to the accompanying drawings.

[0021] Implementation method 1.

[0022] Figure 1 This is a schematic structural diagram showing the elevator according to Embodiment 1. Figure 1 In the image, the elevator is shown unfolded on a plane.

[0023] In the figure, a support beam 12 is provided at the top of the shaft 11. A traction machine 13 is supported on the support beam 12. The traction machine 13 has a traction machine body 14 and a drive sheave 15.

[0024] The traction machine body 14 has a traction machine motor (not shown) and a traction mechanism brake (not shown). The traction machine motor rotates the drive sheave 15. The traction mechanism brake keeps the drive sheave 15 stationary. In addition, the traction mechanism brakes the rotation of the drive sheave 15.

[0025] Multiple suspension bodies 16 are wound around the drive pulley 15. Figure 1Only one suspension body 16 is shown in the diagram. Each suspension body 16 is constructed using a rope or strap.

[0026] The car 17 and counterweight 18 are suspended within the hoistway 11 by means of a suspension body 16. Furthermore, by rotating the drive sheave 15, the car 17 and counterweight 18 are raised and lowered within the hoistway 11.

[0027] A pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown) are installed inside the hoistway 11. The pair of car guide rails guide the raising and lowering of the car 17. The pair of counterweight guide rails guide the raising and lowering of the counterweight 18.

[0028] The support beam 12 is provided with a first rope end fixing part 19 and a second rope end fixing part 20. The suspension body 16 has a first end 16a as one end in the length direction and a second end 16b as the other end in the length direction. The first end 16a is connected to the first rope end fixing part 19. The second end 16b is connected to the second rope end fixing part 20.

[0029] A first car sheave 21 and a second car sheave 22 are provided at the lower part of the car 17. A counterweight sheave 23 is provided at the upper part of the counterweight 18.

[0030] The suspension body 16, starting from the first end 16a, is sequentially wound around the first car sheave 21, the second car sheave 22, the drive sheave 15, and the counterweight sheave 23 to reach the second end 16b. That is, the elevator of Embodiment 1 is a machine room-less elevator with a 2:1 rope winding method.

[0031] A control panel 24 is installed inside the hoistway 11. The control panel 24 controls the operation of the car 17 by controlling the traction machine 13.

[0032] A weighing device 30 is supported on the support beam 12. Signals from the weighing device 30 are sent to the control panel 24. The control panel 24 detects the load inside the car 17 based on the signals from the weighing device 30.

[0033] Figure 2 It is shown Figure 1 The front view of the weighing device 30. The first rope end fixing part 19 has multiple rope end rods 25, multiple rope end springs 26, multiple spring seats 27 and multiple adjusting nuts 28.

[0034] Each rope end rod 25 passes through the support beam 12. The lower end of each rope end rod 25 is connected to the corresponding suspension body 16.

[0035] Multiple rope end springs 26 are mounted on the support beam 12. A corresponding rope end rod 25 passes through each rope end spring 26. Each rope end spring 26 extends and retracts according to the tension acting on the corresponding suspension body 16.

[0036] Each spring seat 27 is mounted on a corresponding rope end spring 26. A corresponding rope end rod 25 passes through each spring seat 27.

[0037] Each adjusting nut 28 is screwed onto the rope end rod 25 on its corresponding spring seat 27. The working length of the corresponding rope end spring 26 is adjusted by adjusting the tightening amount of each adjusting nut 28.

[0038] The weighing device 30 includes a frame 31, a rotating body 50, a sensor 32, and a transmission mechanism 33.

[0039] The frame 31 is fixed to the support beam 12. Furthermore, the frame 31 has a bottom portion 31a, a vertical portion 31b, and an upper surface portion 31c. The bottom portion 31a is fixed to the support beam 12. The vertical portion 31b protrudes upward at a right angle relative to the bottom portion 31a. The upper surface portion 31c protrudes at a right angle from the upper end of the vertical portion 31b in the same direction as the bottom portion 31a.

[0040] The rotating body 50 is mounted on the vertical part 31b in a manner that allows it to rotate about a horizontal support shaft 44. The support shaft 44 is fixed to the vertical part 31b.

[0041] The rotating body 50 has a circular plate-shaped mounting member 51 and a connecting arm 52. The mounting member 51 is supported on the support shaft 44 in a manner that allows it to rotate relative to the support shaft 44. For example, the same detection pulley used in conventional weighing devices can be used as the mounting member 51.

[0042] The connecting arm 52 is detachably mounted to the mounting member 51. Furthermore, the connecting arm 52 is a strip-shaped flat plate. Additionally, the connecting arm 52 is rotatable together with the mounting member 51 around the support shaft 44. Furthermore, the connecting arm 52 protrudes radially from the mounting member 51 towards the side opposite to the first rope end fixing portion 19.

[0043] A wire connection hole 52a is provided at the end of the connecting arm 52 on the side opposite to the first rope head fixing part 19.

[0044] Sensor 32 is mounted on mounting member 51. In Embodiment 1, the mounting member 51 is the component that mounts sensor 32. Sensor 32 generates a signal based on the rotation angle of the rotating body 50. For example, a tilt sensor can be used as sensor 32.

[0045] The transmission mechanism 33 causes the rotating body 50 to rotate according to the load inside the car 17. Figure 1 This shows the state where the load inside the car 17 is the baseline value. In this state, the connecting arm 52 is horizontal.

[0046] The transmission mechanism 33 has multiple pulley tables 34, multiple fixed nuts 35, multiple movable pulleys 36, multiple fixed pulleys 37, guide pulleys 38, screws 39, positioning nuts 40, detection wires 41, tensioning wires 42, and tension springs 43.

[0047] Each pulley block 34 is fixed to the upper end of the corresponding rope end bar 25 using a fixing nut 35. Each movable pulley 36 is supported on its corresponding movable pulley 36 in a manner that allows it to rotate around a horizontal axis of rotation. As a result, each movable pulley 36 and its corresponding rope end bar 25 move together in the vertical direction.

[0048] Multiple fixed pulleys 37 are arranged above multiple movable pulleys 36. Each fixed pulley 37 is arranged in the vertical part 31b in such a way that it can rotate about a horizontal axis of rotation.

[0049] The guide pulley 38 is positioned above the rotating body 50. Furthermore, the guide pulley 38 is arranged in the vertical portion 31b in such a way that it can rotate about a horizontal axis of rotation.

[0050] The screw 39 is fixed to the upper surface 31c by the positioning nut 40. The vertical position of the screw 39, that is, the amount by which the screw 39 protrudes downward from the upper surface 31c, can be adjusted by rotating the positioning nut 40.

[0051] The base end of the detection wire 41 is connected to the lower end of the screw 39. The end of the detection wire 41 is connected to the wire connection hole 52a of the connecting arm 52. The connection point between the detection wire 41 and the rotating body 50 is the wire connection hole 52a.

[0052] The middle portion of the detection wire 41 is alternately wound around the movable pulley 36 and the fixed pulley 37. In addition, the detection wire 41 is guided to the connecting arm 52 by being wound around the guide pulley 38.

[0053] The tension wire 42 is connected to the wire connection hole 52a of the connecting arm 52. The tension spring 43 is disposed between the tension wire 42 and the bottom part 31a.

[0054] When the load inside the car 17 exceeds the reference value, each rope end rod 25 shifts downward relative to the support beam 12, thereby pulling the detection wire 41. Thus, as... Figure 3 As shown, the rotating body 50 overcomes the tension spring 43 and moves from... Figure 2 The state rotates clockwise.

[0055] When the load inside the car 17 is less than the reference value, each rope end rod 25 shifts upward relative to the support beam 12, thereby slackening the detection wire 41. Consequently, the rotating body 50 is moved upward by the tension spring 43. Figure 2The body rotates counterclockwise. The tension spring 43 applies a rotational force to the rotating body 50 in the direction of no load via the tension wire 42.

[0056] Figure 4 It shows that Figure 2 The front view shows the state after the connecting arm 52 is replaced with another connecting arm 53. A wire connection hole 53a is provided at the end of the other connecting arm 53 on the side opposite to the first rope head fixing part 19. The detection wire 41 and the tension wire 42 are connected to the wire connection hole 53a. The connection point where the detection wire 41 connects to the rotating body 50 is the wire connection hole 53a.

[0057] The lengths of the other connecting arms 53 are different from the lengths of the connecting arms 52. Therefore, the lengths of the other connecting arms 53 from the rotation center to the wire connection hole 53a are different from the lengths of the connecting arms 52 from the rotation center to the wire connection hole 52a.

[0058] In this example, the length of the other connecting arm 53 is shorter than the length of the connecting arm 52. Therefore, the length of the other connecting arm 53 from the rotation center to the wire connection hole 53a is shorter than the length of the connecting arm 52 from the rotation center to the wire connection hole 52a.

[0059] Thus, in Embodiment 1, the connecting arm 52 can be replaced with another connecting arm 53 of different length. This allows for the alteration of the distance from the rotation center of the rotating body 50 to the connection point where the detection wire 41 connects to the rotating body 50.

[0060] In such a weighing device 30, the distance from the center of rotation of the rotating body 50 to the connection point where the detection wire 41 connects to the rotating body 50 can be varied. Thus, for example, in... Figure 2 Connecting arm 52 and Figure 4 Among the other connecting arms 53, the loads within the car 17 required to rotate the rotating body 50 by the same angle are different. Specifically, to make Figure 4 The other connecting arms 53 rotate to the same position as... Figure 3 The load ratio required within car 17 for the same angle is used Figure 2 The case of connecting arm 52 is small.

[0061] Therefore, even with different rated load capacities, the tilt angle of the sensor 32 can be kept within a certain range by selecting which of the connecting arms 52 and other connecting arms 53 to install on the mounting component 51. Thus, the mounting component 51 can be shared for different rated load capacities, and the load inside the car 17 can be detected with high accuracy.

[0062] Furthermore, by preparing various other connecting arms 53 of different lengths, it is possible to handle multiple elevators with different rated load capacities.

[0063] Implementation method 2.

[0064] Next, Figure 5 This is a front view showing the weighing device 30 according to Embodiment 2. In the connecting arm 52 of Embodiment 2, an elongated hole 52b is provided along the length direction of the connecting arm 52. The support shaft 44 passes through the elongated hole 52b.

[0065] The mounting position of the connecting arm 52 relative to the mounting component 51 can be continuously adjusted within the range of the elongated hole 52b. This allows for changing the distance from the rotation center of the rotating body 50 to the wire connection hole 52a.

[0066] The other structures of Embodiment 2 are the same as those of Embodiment 1.

[0067] With this structure, the same effect as in embodiment 1 can be achieved. Furthermore, the shared connecting arm 52 can accommodate multiple elevators with different rated load capacities, thus suppressing the increase in the number of component types.

[0068] Alternatively, in embodiment 2, the mounting position of the connecting arm 52 relative to the mounting component 51 can be adjusted discontinuously, i.e., in stages.

[0069] Furthermore, the structure of Embodiment 2 can also be combined with the structure of Embodiment 1. In this case, elongated holes are also provided in other connecting arms 53 with different lengths than connecting arm 52. Thus, it is possible to address large differences in rated load capacity depending on which connecting arm 52 or other connecting arm 53 is used, and to address smaller differences in rated load capacity by adjusting the installation position.

[0070] Implementation method 3.

[0071] Next, Figure 6 This is a front view showing the weighing device 30 according to Embodiment 3. In the connecting arm 52 of Embodiment 3, two or more wire connection holes 52a are provided at intervals along the length of the connecting arm 52. Furthermore, by selecting a wire connection hole 52a from the two or more wire connection holes 52a to connect the detection wire 41, the distance from the rotation center of the rotating body 50 to the connection point where the detection wire 41 connects to the rotating body 50 can be changed in stages.

[0072] The other structures of Embodiment 3 are the same as those of Embodiment 1.

[0073] With this structure, the same effect as in embodiment 1 can be achieved. Furthermore, the shared connecting arm 52 can accommodate multiple elevators with different rated load capacities, thus suppressing the increase in the number of component types.

[0074] Alternatively, in embodiment 3, a sliding member that can slide along the length of the connecting arm 52 may be provided on the connecting arm 52, and the detection wire 41 may be connected to the sliding member. In this case, the connection point between the detection wire 41 and the rotating body 50 is the sliding member. Therefore, the connection position between the detection wire 41 and the connecting arm 52 can be continuously adjusted.

[0075] Furthermore, the structure of Embodiment 3 can also be combined with the structure of Embodiment 1. In this case, two or more wire connection holes 53a are also provided on other connecting arms 53 with different lengths than connecting arm 52. Thus, it is possible to address large differences in rated load capacity depending on which of the connecting arm 52 or other connecting arms 53 is used, and to address smaller differences in rated load capacity by adjusting the connection position.

[0076] Implementation method 4.

[0077] Next, Figure 7 This is a front view showing the weighing device 30 according to Embodiment 4. In the weighing device 30 of Embodiment 4, in addition to the same structure as in Embodiment 2, an elongated hole 31d is provided in the vertical portion 31b of the frame 31. Furthermore, the mounting position of the mounting member 51 relative to the frame 31 can be continuously adjusted within the range of the elongated hole 31d, together with the position of the support shaft 44.

[0078] The elongated hole 31d is arranged in a direction parallel to the center of rotation of the connecting rotating body 50 when the load inside the car 17 is the reference value and the straight line of the wire connection hole 52a. In this example, the length direction of the elongated hole 31d is horizontal.

[0079] The other structures of Embodiment 4 are the same as those of Embodiment 2.

[0080] With this structure, the same effect as in Embodiment 2 can be achieved. Furthermore, the mounting position of the mounting component 51 relative to the frame 31 can be changed depending on the mounting position of the connecting arm 52 relative to the mounting component 51. This allows for optimization of the component layout and a more compact weighing device 30.

[0081] Alternatively, in embodiment 4, the mounting position of the mounting component 51 relative to the frame 31 can be adjusted discontinuously, i.e., in stages, along with the position of the support shaft 44.

[0082] Furthermore, in embodiments 1 and 3, the mounting position of the mounting component 51 relative to the frame 31 can be adjusted in the same way as in embodiment 4.

[0083] Furthermore, in embodiments 1 to 4, the shape of the mounting component 51 is not limited to a circular plate. Also, the shape of the connecting arm 52 is not limited to a strip-shaped flat plate.

[0084] Implementation method 5.

[0085] Next, Figure 8 This is a front view showing the weighing device 30 according to Embodiment 5. The rotating body 50 of Embodiment 5 consists only of the connecting arm 52. Therefore, the sensor 32 is mounted on the end of the connecting arm 52 opposite to the wire connection hole 52a. That is, the connecting arm 52 also serves as a mounting component.

[0086] The connecting arm 52 is rotatable about the support shaft 44. Similar to Embodiment 2, the connecting arm 52 is provided with an elongated hole 52b. Therefore, the mounting position of the connecting arm 52 relative to the support shaft 44 can be continuously adjusted within the range of the elongated hole 52b. Thus, the distance from the rotation center of the rotating body 50 to the connection point where the detection wire 41 connects to the rotating body 50 can be varied.

[0087] The other structures of Embodiment 5 are the same as those of Embodiment 2.

[0088] With this structure, the same effect as in embodiment 2 can be achieved. Furthermore, the rotating body 50 can be miniaturized, and the number of parts can be reduced.

[0089] Alternatively, in embodiment 5, the mounting position of the connecting arm 52 relative to the support shaft 44 can be adjusted discontinuously, i.e., in stages.

[0090] In addition, in embodiment 5, the mounting position of the connecting arm 52 relative to the frame 31 can be adjusted together with the position of the support shaft 44.

[0091] Furthermore, the rotating body 50 in Embodiment 3 can also be composed of only the connecting arm 52, just like in Embodiment 5.

[0092] Furthermore, in embodiments 1 to 5, the specific structure of the transmission mechanism 33 is not limited to the examples described above.

[0093] Furthermore, in embodiments 1 to 5, the weighing device 30 may also be provided at the second rope end fixing part 20.

[0094] Alternatively, the elevator can also be an elevator with a machine room. In this case, the first rope end fixing part 19, the second rope end fixing part 20, and the weighing device 30 can also be installed in the machine room.

[0095] Furthermore, the type of elevator is not limited to Figure 1 The type of weighing device 30 can also be, for example, a 1:1 rope winding method. In this case, the weighing device 30 can also be installed in the car 17 or the counterweight 18.

[0096] In addition, elevators can also be double-decker elevators, single-shaft multi-car elevators, etc. In a single-shaft multi-car elevator, the upper car and the lower car located directly below the upper car each move independently in a shared shaft.

Claims

1. A weighing device for an elevator, wherein, The elevator's weighing device includes: frame; A rotating body, which is rotatably disposed on the frame; A sensor, mounted on the rotating body, generates a signal corresponding to the rotation angle of the rotating body; as well as A transmission mechanism having a detection wire connected to the rotating body, and rotating the rotating body according to the load inside the car. The distance from the rotation center of the rotating body to the connection point where the detection wire connects to the rotating body can be varied.

2. The elevator weighing device according to claim 1, wherein, The rotating body has: A mounting component, rotatably mounted on the frame, and the sensor mounted on the mounting component; and A connecting arm, which is detachably mounted to the mounting component and connected to the detection wire, The connecting arm can be replaced with other connecting arms of different lengths.

3. The elevator weighing device according to claim 1, wherein, The rotating body has: A mounting component, rotatably mounted on the frame, and the sensor mounted on the mounting component; and A connecting arm, which is mounted on the mounting component and connected to the detection wire, The mounting position of the connecting arm relative to the mounting component can be adjusted, thereby changing the distance from the rotation center to the connecting part.

4. The elevator weighing device according to claim 1, wherein, The rotating body has: A mounting component, rotatably mounted on the frame, and the sensor mounted on the mounting component; and A connecting arm, which is mounted on the mounting component and connected to the detection wire, The connection position between the detection wire and the connecting arm can be adjusted, thereby changing the distance from the rotation center to the connection point.

5. The weighing device for an elevator according to any one of claims 2 to 4, wherein, The mounting component is rotatable about a support shaft provided on the frame. The mounting position of the mounting component relative to the frame can be adjusted together with the position of the support shaft.

6. The elevator weighing device according to claim 1, wherein, The rotating body is composed of connecting arms that are flat plates in the shape of strips. The connecting arm is rotatable about a support shaft located on the frame. The mounting position of the connecting arm relative to the support shaft is adjustable.

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