Single-leaf door device for an elevator

Abstract

In a single-leaf door device of an elevator, a toothed belt is provided with a belt clamp. A door main body is connected to the toothed belt via the belt clamp, and performs opening and closing actions by movement of the toothed belt caused by rotation of a first pulley and a second pulley. A mass body is attached to the toothed belt and moves together with the toothed belt. Furthermore, the mass body is attached to the toothed belt at a position where the mass body moves in a direction opposite to the belt clamp when the door main body performs the opening and closing actions.

Description

Technical Field

[0001] This disclosure relates to a single-door device for elevators. Background Technology

[0002] In existing car door opening and closing devices, a ring-shaped drive cable is wound around a pair of pulleys. The car door is connected to the drive cable. As the drive cable, for example, a toothed belt is used (see, for example, Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2008-168957 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In the aforementioned existing car door opening and closing device, when the car door opens and closes at a fixed speed, the chordal vibration of the toothed belt resonates with the excitation vibration generated by the meshing of the toothed belt and a pair of pulleys, sometimes producing noise.

[0008] This disclosure was made to solve the aforementioned problem, and its purpose is to provide a single-door device for an elevator capable of suppressing vibrations of a toothed belt.

[0009] Methods for solving problems

[0010] The single-door device of the elevator disclosed herein includes: a first pulley; a second pulley arranged at a distance from the first pulley; a toothed belt wound around the first and second pulleys and having a plurality of teeth; a belt clamp mounted on the toothed belt; a door body connected to the toothed belt via the belt clamp, which performs opening and closing actions by the movement of the toothed belt caused by the rotation of the first and second pulleys; and a mass body mounted on the toothed belt and moving together with the toothed belt, the mass body being mounted on the toothed belt at a position where it moves in the opposite direction to the belt clamp when the door body performs the opening and closing action.

[0011] Invention Effects

[0012] The single-door device for elevators disclosed herein can suppress vibrations of the toothed belt. Attached Figure Description

[0013] Figure 1 This is a schematic structural diagram of the elevator according to Embodiment 1.

[0014] Figure 2 Observation from the station side Figure 1 Front view of the car door assembly.

[0015] Figure 3 It is shown Figure 2 A front view of the car door assembly in its fully open state.

[0016] Figure 4 It is shown Figure 2 A model diagram of the upper part of the toothed belt.

[0017] Figure 5 It is shown Figure 4 A model diagram showing the force balance at three points.

[0018] Figure 6 It is shown in the illustration Figure 2 A model diagram of the upper part of a toothed belt, showing the case where a fixed end is subjected to displacement excitation.

[0019] Figure 7 It is shown Figure 6 The graph shows the time variation of the displacement of the five particles.

[0020] Figure 8 This is a graph illustrating an example of the relationship between door opening and closing time and door speed and motor torque.

[0021] Figure 9 It is shown Figure 2 A side view of the mass body.

[0022] Figure 10 It is along Figure 9 A cross-sectional view along the XX line.

[0023] Figure 11 It is shown Figure 2 Side view of the first modified example of the mass body.

[0024] Figure 12 It is along Figure 11 A sectional view of line XII-XII.

[0025] Figure 13 It is shown Figure 2 The side view of the second modified example of the mass body.

[0026] Figure 14 It is along Figure 13 A cross-sectional view of line XIV-XIV.

[0027] Figure 15 It is shown Figure 2 The side view of the third modified example of the mass body.

[0028] Figure 16 It is along Figure 15 A cross-sectional view along the XVI-XVI line.

[0029] Figure 17This is a side view showing an example of a mass body mounted on a toothed belt with seams.

[0030] Figure 18 This is a side view showing the main part of the toothed belt in Embodiment 2. Detailed Implementation

[0031] The embodiments will now be described with reference to the accompanying drawings.

[0032] Implementation Method 1

[0033] Figure 1 This is a schematic structural diagram of the elevator according to Embodiment 1. In the diagram, a machine room 2 is provided above the hoistway 1. The machine room 2 is equipped with a traction machine 3, a deflector sheave 4, and an elevator control device 5.

[0034] The traction machine 3 includes a drive sheave 6, a traction machine motor (not shown), and a traction mechanism brake (not shown). The traction machine motor rotates the drive sheave 6. The traction mechanism brake keeps the drive sheave 6 stationary. Furthermore, the traction mechanism brakes the rotation of the drive sheave 6.

[0035] A suspension body 7 is wound around the drive sheave 6 and the deflector sheave 4. Multiple ropes or belts are used as the suspension body 7. A car 8 is connected to the first end of the suspension body 7. A counterweight 9 is connected to the second end of the suspension body 7.

[0036] The car 8 and counterweight 9 are suspended by the suspension body 7 and move up and down within the hoistway 1 by rotating the drive sheave 6. The elevator control unit 5 controls the operation of the car 8 by controlling the traction machine 3.

[0037] A pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown) are installed in the hoistway 1. The pair of car guide rails guide the lifting and lowering of the car 8. The pair of counterweight guide rails guide the lifting and lowering of the counterweight 9.

[0038] The car 8 has a car frame 10 and a car compartment 11. A suspension body 7 is connected to the car frame 10. The car compartment 11 is supported by the car frame 10. A car door device 12 is provided in the car compartment 11. The car door device 12 opens and closes the car entrance and exit.

[0039] A door controller 13 is installed on the car 8.

[0040] Each floor is equipped with a landing door device 14. Each landing door device 14 opens and closes the corresponding landing entrance / exit. In addition, each landing door device operates in conjunction with the car door device 12 when the car 8 stops at a floor.

[0041] Figure 2 Observation from the station side Figure 1The front view of the car door device 12 shows the car door device 12 in the fully closed state. Figure 3 It is shown Figure 2 The front view of the car door device 12 in its fully open state. The car door device 12 of Embodiment 1 is a single-opening door device.

[0042] The car door assembly 12 includes a door controller 13, a door truss 21, a door motor 22, a first pulley 23, a second pulley 24, a ring-shaped toothed belt 25, a first door body 26, a second door body 27, a clamp 28, a linkage mechanism (not shown), and a mass body 29.

[0043] The door truss 21 is fixed to the upper part of the car compartment 11. A door track 21a is formed on the door truss 21.

[0044] Door motor 22 is fixed to door truss 21. First pulley 23 is fixed to the rotation shaft of door motor 22 and rotates via door motor 22. The rotation center of first pulley 23 is parallel and horizontal to the depth direction of car 8. The depth direction of car 8 is parallel to... Figure 2 The direction parallel to the Y-axis.

[0045] The second pulley 24 is mounted on the door truss 21. Furthermore, the second pulley 24 is spaced apart from the first pulley 23 in the opening and closing directions of the first door body 26 and the second door body 27. The opening and closing directions of the first door body 26 and the second door body 27 are parallel to the width direction of the car 8. Figure 2 The direction parallel to the X-axis.

[0046] Furthermore, the rotation center of the second pulley 24 is parallel to the rotation center of the first pulley 23. Additionally, the first pulley 23 and the second pulley 24 are positioned at the same location in the vertical direction of the car 8. The vertical direction of the car 8 is the vertical direction, which is parallel to the rotation center of the first pulley 23. Figure 2 The direction parallel to the Z-axis.

[0047] A toothed belt 25 is wound around the first pulley 23 and the second pulley 24. Furthermore, the toothed belt 25 moves cyclically due to the rotation of the first pulley 23 and the second pulley 24. Additionally, as... Figure 9 As shown, the toothed belt 25 has multiple teeth 25a. Multiple pulley teeth (not shown) are respectively provided on the first pulley 23 and the second pulley 24.

[0048] When the first door body 26 is in the fully closed position, it is located on the door stop side compared to the second door body 27. That is, when the second door body 27 is in the fully closed position, it is located on the door frame side compared to the first door body 26.

[0049] During the opening and closing action, the first door body 26 moves at a higher speed than the second door body 27. That is, the first door body 26 is a high-speed door. During the opening and closing action, the second door body 27 moves at a lower speed than the first door body 26. That is, the second door body 27 is a low-speed door.

[0050] The first door body 26 has a first door panel 31 and a first door hanger 32. The first door hanger 32 is fixed to the upper part of the first door panel 31.

[0051] The second door body 27 has a second door panel 33 and a second door hanger 34. The second door hanger 34 is fixed to the upper part of the second door panel 33.

[0052] Multiple door rollers (not shown) are respectively provided on the first door hanger 32 and the second door hanger 34. When the first door body 26 and the second door body 27 are opened and closed, the multiple door rollers move while rolling on the door track 21a.

[0053] The first door body 26 and the second door body 27 are suspended from the door track 21a. Furthermore, during opening and closing operations, the first door body 26 and the second door body 27 are guided by the door track 21a and move along the width direction of the car 8. That is, the opening and closing direction of the first door body 26 and the second door body 27 is parallel to the width direction of the car 8. Figure 2 The direction parallel to the X-axis.

[0054] The clamp 28 is mounted on either the upper or lower portion of the toothed belt 25. In Embodiment 1, the clamp 28 is mounted on the lower portion of the toothed belt 25.

[0055] The lower portion of the toothed belt 25 is located below the first pulley 23 and the second pulley 24 when the first door body 26 is in the fully closed position. The upper portion of the toothed belt 25 is located above the first pulley 23 and the second pulley 24 when the first door body 26 is in the fully closed position.

[0056] Furthermore, the clamp 28 is fixed to the first door hanger 32. The first door body 26 is connected to the toothed belt 25 via the clamp 28. Thus, the first door body 26 opens and closes by moving the toothed belt 25 due to the rotation of the first pulley 23 and the second pulley 24. The door motor 22 generates the driving force that causes the first door body 26 to open and close.

[0057] The opening and closing action of the first door body 26 is transmitted to the second door body 27 via a linkage mechanism. Thus, the second door body 27 and the first door body 26 open and close in a coordinated manner.

[0058] The door controller 13 controls the door motor 22, thereby controlling the opening and closing of the first door body 26. Furthermore, the door controller 13 maintains a fixed maximum speed for at least 0.5 seconds during the opening and closing of the first door body 26.

[0059] Mass 29 is mounted on the toothed belt 25 at a position where it moves in the opposite direction to the clamp 28 when the first door body 26 performs an opening and closing operation. That is, mass 29 is mounted on the toothed belt 25 at the other of its upper and lower portions. In Embodiment 1, mass 29 is mounted on the upper portion of the toothed belt 25. Mass 29 moves together with the toothed belt 25.

[0060] Furthermore, the mass body 29 is mounted on the toothed belt 25 at a position where it does not interfere with the first pulley 23 and the second pulley 24 when the first door body 26 and the second door body 27 are opening and closing.

[0061] When the first door body 26 is in the fully closed position, the clamp 28 is located on the side of the first pulley 23, between the first pulley 23 and the second pulley 24. When the first door body 26 is in the fully closed position, the mass body 29 is located on the side of the second pulley 24, between the first pulley 23 and the second pulley 24.

[0062] The mass of mass body 29 is less than 10% of the mass of the first gate body 26. Furthermore, the mass of mass body 29 is more than 20% and less than 100% of the mass of each meter of toothed belt 25.

[0063] Next, the function of mass body 29 will be explained. Figure 4 It is shown Figure 2 A model diagram of the upper part of the toothed belt 25. Figure 4 In the middle, the fixed end on the right corresponds to the first pulley 23. Furthermore, the fixed end on the left corresponds to the second pulley 24.

[0064] Suppose that multiple mass points are placed at regular intervals on the upper part of length L. i m is the mass of the i-th particle. i-1 It is the mass of the (i-1)th particle. i+1 y is the mass of the (i+1)th particle. i This represents the displacement of the i-th particle in the vertical direction.

[0065] Figure 5 It is shown Figure 4 A model diagram showing the force equilibrium at three point masses. Figure 5In this model, Δx is the interval between adjacent particles. Furthermore, when the number of model segments is set to N, Δx is L / N. N is a natural number. y is the vertical displacement of each particle. T is the horizontal force acting on each particle, i.e., the tension of the toothed belt 25. F is the vertical force acting on each particle.

[0066] According to Figure 5 When the equation of motion related to the displacement y of the particle in the vertical direction is obtained by balancing the forces in the equation, it becomes equation (1).

[0067]

[0068] Here, during the opening and closing action of the first gate body 26, no external force in the vertical direction is applied to the toothed belt 25. Therefore, when the external force acting on the mass point is set to 0 and the tension T of the toothed belt 25 is set to a fixed value, equation (2) is obtained.

[0069]

[0070] According to equation (2), the displacement y of the i-th particle is i The displacement y of the (i-1)th particle i-1 and the displacement y of the (i+1)th mass point i+1 This is determined by the displacement y of each particle. This is the same for any particle. That is, the displacement y of each particle is determined by the displacement y of its two adjacent particles.

[0071] Here, in equation (2), we consider the case where the (i-1)th mass point is set as a fixed end, and this fixed end is subjected to displacement excitation. This is equivalent to the case where, in the car door device 12, a toothed belt 25 is excited by the door motor 22 and the first pulley 23 or the second pulley 24.

[0072] Specifically, the door motor 22 generates a torque that drives the first door body 26, thus the toothed belt 25 is excited in the vertical direction by the door motor 22. This displacement excitation is expressed by the following formula.

[0073] y i-1 =A sin(ωt)…(3)

[0074] Substituting equation (3) into equation (2) yields equation (4).

[0075]

[0076] Since the tension T and the interval Δx are fixed values, according to equation (4), in order to reduce the vertical acceleration of the particle caused by the displacement excitation of the fixed end and reduce the displacement of the particle in the vertical direction, it is only necessary to increase the mass of the particle.

[0077] Figure 6 It is shown in the illustration Figure 2 The model diagram shows the case where a fixed end of the upper part of the toothed belt 25 is subjected to displacement excitation. Figure 7 It is shown Figure 6 A graph showing the time-varying displacement of the five particles. Figure 7 In the diagram, dashed lines indicate the case where all particles have equal mass. Solid lines indicate the case where only the i-th particle has a greater mass than the other four particles.

[0078] like Figure 7 As shown, compared with the case where all particles have equal mass, when the mass of one particle is greater than the mass of the others, the displacement y of each particle in the vertical direction becomes smaller. According to this result, as shown in equation (4), when the toothed belt 25 is subjected to displacement excitation, the vibration suppression effect is achieved by partially increasing the mass of the toothed belt 25.

[0079] Next, using equations (5) to (9), the vibration of the toothed belt 25 as a whole when the mass of the toothed belt 25 is partially increased will be explained. In this example, the mass of the i-th mass is greater than the masses of the other masses. Furthermore, the masses of the other four masses are equal.

[0080] Equation (5) shows Figure 6 The displacement of the i-th particle.

[0081]

[0082] Equation (6) shows Figure 6 The displacement of the (i+1)th particle.

[0083]

[0084] Equation (7) shows Figure 6 The displacement of the (i+2)th particle.

[0085]

[0086] Equation (8) shows Figure 6 The displacement of the (i+3)th particle.

[0087]

[0088] Equation (9) shows Figure 6 The displacement of the (i+4)th particle.

[0089]

[0090] The displacement y of the i-th particle iThat is, when the amplitude decreases, the input y for the (i+1)th mass point i As it decreases, the displacement y of the (i+1)th particle also decreases. i+1 It also becomes smaller. Therefore, the displacement y of the (i+1)th particle... i+1 As it decreases, the displacement y of the (i+2)th particle... i+2 It also becomes smaller. Below, the displacement y of the (i+3)th particle... i+3 and the displacement y of the (i+4)th mass point i+4 They also decrease in size sequentially.

[0091] That is, by partially increasing the mass of the toothed belt 25, the input to adjacent mass points can be reduced, i.e., the right side of equations (5) to (9), and thus the vibration of the toothed belt 25 as a whole can be reduced.

[0092] In the car door device 12 of Embodiment 1, a mass 29 is mounted on the toothed belt 25. Furthermore, the mass 29 is positioned so that it moves in the opposite direction to the belt clamp 28 when the first door body 26 performs an opening and closing operation.

[0093] Therefore, the vibration of the toothed belt 25 can be suppressed. As a result, the noise generated during the opening and closing of the first door body 26 and the second door body 27 can be reduced.

[0094] here, Figure 8 This is a graph illustrating an example of the relationship between door opening and closing time and door speed and motor torque.

[0095] For example, Figure 8 As shown, when the door opening and closing action consists of an acceleration region, a constant speed region, and a deceleration region, the maximum speed, i.e., the constant speed, of the first door body 26 during its opening and closing action is set to 400 mm / s. Furthermore, the spacing between the multiple toothed belts 25a is set to 5 mm. In this case, the toothed belt 25 is excited at 80 Hz during the opening and closing action of the first door body 26.

[0096] On the other hand, the linear density ρ of the toothed belt 25 is 0.065 kg / m, the fixed distance L between the center of the first pulley 23 and the center of the second pulley 24 is 1500 mm, and the tension T of the toothed belt 25 when the motor torque of the gate motor 22 is fixed is 150 N. In this case, when the square root of T / ρ is set as α, the natural frequency of the string vibration of the toothed belt 25 becomes 1 / 2L×α=16Hz. Therefore, the fifth component of the string vibration coincides with the excitation frequency, and the toothed belt 25 may vibrate significantly.

[0097] In contrast, in embodiment 1, a mass body 29 is installed on the toothed belt 25, thus suppressing the resonance between the excitation vibration and the string vibration caused by the meshing with the first pulley 23 and the second pulley 24 in the toothed belt 25.

[0098] Furthermore, the structure is simple because only the toothed belt 25 is fitted with a mass body 29.

[0099] Furthermore, the mass of mass body 29 is less than 10% of the mass of the first gate body 26. Therefore, it is possible to suppress the deflection of the toothed belt 25 caused by the mass of mass body 29.

[0100] Furthermore, the mass of the mass body 29 is more than 20% and less than 100% of the mass of each meter of the toothed belt 25. Therefore, the deflection of the toothed belt 25 caused by the mass of the mass body 29 can be sufficiently suppressed.

[0101] Furthermore, the door controller 13 maintains a fixed maximum speed for more than 0.5 seconds during the opening and closing of the first door body 26. Therefore, by simply changing the duration of maintaining the fixed maximum speed, it is easy to accommodate differences in the width of the car entrance and exit, and the software used to control the opening and closing actions can be easily configured.

[0102] However, in the control method that extends the time for maintaining a fixed maximum speed, when the aforementioned excitation vibration and string vibration resonate, this state is maintained, and the vibration increases. In contrast, in Embodiment 1, a mass body 29 is mounted on the toothed belt 25, thus, software settings can be easily performed, and the vibration of the toothed belt 25 can be suppressed.

[0103] The specific structure of mass body 29 will be described below. Figure 9 It is shown Figure 2 Side view of mass body 29. Figure 10 It is along Figure 9 A cross-sectional view along the XX line.

[0104] Mass body 29 has a flat first part 41, a second part 42 and a plurality of fasteners 43.

[0105] The first component 41 abuts against the side of the toothed belt 25 opposite to the plurality of teeth 25a. The first component 41 is provided with a plurality of through holes 41a.

[0106] The second component 42 has a flat base portion 42a and a plurality of protrusions 42b serving as stop portions. The base portion 42a abuts against the end faces of a plurality of teeth 25a. The plurality of protrusions 42b protrude from the base portion 42a toward the first component 41.

[0107] Each protrusion 42b is inserted into a recess between two adjacent teeth 25a, engaging with the recess. That is, multiple protrusions 42b engage with multiple teeth 25a. Thus, the multiple teeth 25a restrict the movement of the mass 29 relative to the toothed belt 25 along the length of the toothed belt 25. The length direction of the toothed belt 25 is perpendicular to... Figure 9 The direction parallel to the X-axis.

[0108] A plurality of threaded holes 42c are provided in the base portion 42a. Each fastener 43 is a bolt, for example. Each fastener 43 passes through a corresponding through hole 41a and is screwed into a corresponding threaded hole 42c. Each fastener 43 is positioned on the outside of the toothed belt 25 in the width direction. The width direction of the toothed belt 25 is parallel to the depth direction of the car 8. Figure 10 The direction parallel to the Y-axis.

[0109] By screwing each fastener 43 into the corresponding threaded hole 42c, the toothed band 25 is clamped between the first component 41 and the second component 42.

[0110] Based on this mass body 29, it is possible to suppress the offset of the mass body 29 relative to the toothed belt 25.

[0111] Figure 11 It is shown Figure 2 Side view of the first modified example of mass body 29. Figure 12 It is along Figure 11 A sectional view of line XII-XII.

[0112] In the first variation, the mass body 29 has fastened parts 44 and multiple fasteners 45.

[0113] The fastened component 44 has a flat first part 44a, a flat second part 44b, and a connecting part 44c.

[0114] Part 1 44a abuts against the side of the toothed belt 25 opposite to the plurality of teeth 25a. Part 2 44b abuts against the end face of the plurality of teeth 25a. Connecting part 44c connects Part 1 44a and Part 2 44b.

[0115] Part 1, 44a, has multiple through holes 44d. Part 2, 44b, has multiple threaded holes 44e.

[0116] Each fastener 45 is a bolt, for example. Each fastener 45 passes through a corresponding through hole 44d and is screwed into a corresponding threaded hole 44e. By screwing each fastener 45 into the corresponding threaded hole 44e, a toothed band 25 is clamped between the first part 44a and the second part 44b.

[0117] Multiple fasteners 45 are disposed only on the outer side of one end of the toothed belt 25 in the width direction. The connecting portion 44c is located on the outer side of the other end of the toothed belt 25 in the width direction.

[0118] In the mass body 29 of the first modified example, the plurality of fasteners 45 are only disposed on the outer side of one end of the toothed belt 25 in the width direction, thereby suppressing interference between the mass body 29 and other devices.

[0119] In addition, with Figure 9 Similarly, multiple protrusions can be provided as stop portions in part 2, 44b.

[0120] Figure 13 It is shown Figure 2 Side view of the second variant of mass body 29. Figure 14 It is along Figure 13 A cross-sectional view of line XIV-XIV.

[0121] In the second variation, the mass body 29 has a pair of annular connecting members 46 and a connected component 47.

[0122] The connected component 47 has a flat main portion 47a, a first protrusion 47b, and a second protrusion 47c.

[0123] The main portion 47a abuts against the side of the toothed belt 25 opposite to the plurality of teeth 25a. The first protrusion 47b and the second protrusion 47c protrude from the main portion 47a toward the side opposite to the toothed belt 25 at intervals along the length of the toothed belt 25.

[0124] A recess 47d is formed on the side of the connected member 47 opposite to the toothed belt 25. The recess 47d is formed between the first protrusion 47b and the second protrusion 47c in the connected member 47.

[0125] Each connector 46 surrounds the main portion 47a and the toothed belt 25, thereby holding the connected component 47 to the toothed belt 25. Each connector 46 is, for example, made of metal wire wound around the main portion 47a and the toothed belt 25. Furthermore, each connector 46 is inserted between two adjacent teeth 25a and into the recess 47d in the toothed belt 25.

[0126] Each connecting member 46 is inserted between two adjacent teeth 25a, thereby restricting the movement of the mass body 29 relative to the toothed belt 25 in the length direction of the toothed belt 25. That is, each connecting member 46 functions as a stop.

[0127] The second modified example also suppresses the displacement of the mass body 29 relative to the toothed belt 25. Furthermore, it suppresses the increase in the size of the mass body 29 in the width direction of the toothed belt 25, and also suppresses interference between the mass body 29 and other devices.

[0128] Figure 15 It is shown Figure 2 The side view of the third variation of mass body 29. Figure 16 It is along Figure 15 A cross-sectional view along the XVI-XVI line.

[0129] In the third variation, the mass body 29 has fastened parts 48 and multiple fasteners 49.

[0130] The fastened component 48 has a flat main portion 48a, a flat first protrusion 48b, and a flat second protrusion 48c.

[0131] The main portion 48a abuts against the side of the toothed belt 25 opposite to the plurality of teeth 25a. The first protrusion 48b and the second protrusion 48c protrude from the main portion 48a toward the toothed belt 25 at intervals in the width direction of the toothed belt 25. The toothed belt 25 passes between the first protrusion 48b and the second protrusion 48c.

[0132] The first protrusion 48b is provided with a plurality of through holes 48d. The second protrusion 48c is provided with a plurality of threaded holes 48e.

[0133] Each fastener 49 is a bolt, for example. Each fastener 49 passes through a corresponding through hole 48d and is screwed into a corresponding threaded hole 48e.

[0134] Furthermore, each fastener 49 is arranged parallel to the width direction of the toothed belt 25 and is inserted between two adjacent teeth 25a. This restricts the movement of the mass 29 relative to the toothed belt 25 in the length direction of the toothed belt 25. In other words, each fastener 49 functions as a stop.

[0135] The displacement of the mass body 29 relative to the toothed belt 25 can also be suppressed by the mass body 29 in the third modification. In addition, the increase in the size of the mass body 29 in the width direction of the toothed belt 25 can be suppressed, and interference between the mass body 29 and other devices can be suppressed.

[0136] Alternatively, it can also be done in Figure 9 43 fasteners Figure 11 Each fastener 45 and Figure 15 Each fastener 49 is equipped with an anti-rotation element. This prevents the mass body 29 from falling off the toothed belt 25.

[0137] Here, in Figures 9-16 In the example shown, a seamless belt is used as the toothed belt 25. The seamless toothed belt 25 is looped before being wound around the first pulley 23 and the second pulley 24.

[0138] By using this seamless toothed belt 25, the assembly of the car door assembly 12 can be easily carried out.

[0139] On the other hand, such as Figure 17 As shown, a toothed belt 25 can also be used, but a seamed belt can also be used. Figure 17 The toothed belt 25 has a first end 25b and a second end 25c. Moreover, the first end 25b and the second end 25c are connected by a mass body 29. In addition, a plurality of protrusions 42b engage with a plurality of belt teeth 25a, thereby preventing the first end 25b and the second end 25c from falling off the mass body 29.

[0140] This structure allows for easy adjustment of the length of the toothed belt 25.

[0141] Implementation Method 2

[0142] then, Figure 18 This is a side view showing the main part of the toothed belt 25 in Embodiment 2. Besides... Figure 18 Except for the toothed belt 25 shown, the structure of the car door device 12 and the elevator are the same as in embodiment 1.

[0143] In Embodiment 2, a weight portion 25d is provided along a portion of the toothed belt 25 in its length direction. The mass per unit length of the weight portion 25d is set to M1. Furthermore, the mass per unit length of the other portions 25e is set to M0. The other portions 25e are the portions of the toothed belt 25 other than the weight portion 25d.

[0144] For example, by making the material density of the weight portion 25d higher than that of the other portion 25e, the mass M1 becomes more than twice the mass M0. That is, M1 ≥ 2 × M0.

[0145] The weight portion 25d is located at a position that moves in the opposite direction to the clamp 28 when the first door body 26 performs an opening and closing operation. That is, the weight portion 25d is located at the same position as the mass body 29 in Embodiment 1.

[0146] This structure achieves the same effect as embodiment 1. Furthermore, it reduces the number of components.

[0147] Alternatively, when a toothed belt is used in the landing door device 14, the mass body 29 of Embodiment 1 or the weight part 25d of Embodiment 2 can also be applied to the toothed belt of the landing door device 14.

[0148] also, Figure 2 and Figure 3 The gate motor 22 shown is a thin-body motor. A thin-body motor is a motor whose dimension in the direction parallel to the rotation axis is smaller than its dimension in the direction perpendicular to the rotation axis. However, the gate motor 22 can also be a long-body motor. A long-body motor is a motor whose dimension in the direction parallel to the rotation axis is larger than its dimension in the direction perpendicular to the rotation axis.

[0149] In addition, Figure 2 and Figure 3 In the car door assembly 12 shown, the rotation axis of the door motor 22 is arranged parallel to the depth direction of the car 8. However, the orientation of the rotation axis of the door motor 22 can be changed by placing a gear (not shown) between the door motor 22 and the first pulley 23.

[0150] In addition, Figure 2 and Figure 3 In the car door assembly 12 shown, the first pulley 23 rotates directly via the door motor 22. However, a reduction mechanism (not shown) can also be provided between the door motor 22 and the first pulley 23. The reduction mechanism has a first transmission belt and a reduction pulley. The diameter of the reduction pulley is larger than the diameter of the first pulley 23. The first transmission belt transmits the output of the door motor 22 to the reduction pulley.

[0151] When a speed reduction mechanism is provided between the door motor 22 and the first pulley 23, the door motor 22 can also be configured at a position away from the first pulley 23, such as on the door truss 21.

[0152] Furthermore, if a reduction gear is provided between the door motor 22 and the first pulley 23, the reduction pulley can also be configured coaxially with the first pulley 23. In this case, the first pulley 23 rotates together with the reduction pulley.

[0153] Furthermore, if a speed reduction mechanism is provided between the door motor 22 and the first pulley 23, the speed reduction pulley can also be positioned away from the first pulley 23. In this case, the speed reduction mechanism, in addition to the first transmission belt and the speed reduction pulley, also includes a transmission pulley and a second transmission belt. The transmission pulley is coaxially arranged with the speed reduction pulley and rotates together with it. The second transmission belt transmits the rotation of the transmission pulley to the first pulley 23.

[0154] In addition, the number of door bodies can be one or more than three.

[0155] Furthermore, the overall layout of the elevator is not limited to Figure 1 The layout. For example, the rope winding method can also be a 2:1 rope winding method.

[0156] In addition, elevators can also be machine-room-less elevators, double-decker elevators, and single-shaft multi-car elevators. A single-shaft multi-car elevator is one in which the upper car and the lower car, located directly below the upper car, move independently within a common shaft.

[0157] Label Explanation

[0158] 12: Car door assembly; 13: Door controller; 23: First pulley; 24: Second pulley; 25: Toothed belt; 25a: Toothed; 25b: First end; 25c: Second end; 25d: Weight part; 26: First door body; 28: With clamp; 29: Mass body; 42b: Protrusion (stop part); 44: Fastened part; 45: Fastener; 46: Connecting part (stop part); 47: Connected part; 47d: Recess; 48: Fastened part; 49: Fastener (stop part).

Claims

1. A single-door device for an elevator, wherein, The single-door device of the elevator has: First pulley; The second pulley is arranged at a distance from the first pulley; A toothed belt is wound around the first pulley and the second pulley, and has multiple teeth; A clamp is attached to the toothed belt; The door body, connected to the toothed belt via the belt clamp, opens and closes by the movement of the toothed belt caused by the rotation of the first pulley and the second pulley; and A mass body, which is mounted on the toothed belt and moves together with the toothed belt. The mass body is mounted on the toothed belt at a position where it moves in the opposite direction to the belt clamp when the door body performs an opening and closing action. The toothed belt is not connected through the mass body.

2. The single-door device for an elevator according to claim 1, wherein, As the toothed belt, a seamless belt is used.

3. The single-door device for an elevator according to claim 1, wherein, The mass body has a stop portion. The stop is inserted between two adjacent teeth to restrict the movement of the mass relative to the toothed belt in the length direction of the toothed belt.

4. The single-door device for an elevator according to claim 2, wherein, The mass body has a stop portion. The stop is inserted between two adjacent teeth to restrict the movement of the mass relative to the toothed belt in the length direction of the toothed belt.

5. The single-door device for an elevator according to any one of claims 1 to 4, wherein, The elevator's single-door device also includes a door controller, which controls the opening and closing of the door body. The door controller maintains a fixed maximum speed for more than 0.5 seconds during the opening and closing of the door body.

6. A single-door device for an elevator, wherein, The single-door device of the elevator has: First pulley; The second pulley is arranged at a distance from the first pulley; A toothed belt is wound around the first pulley and the second pulley, and has multiple teeth; A clamp is attached to the toothed belt; The door body, connected to the toothed belt via the belt clamp, opens and closes by the movement of the toothed belt caused by the rotation of the first pulley and the second pulley; and A mass body, which is mounted on the toothed belt and moves together with the toothed belt. The mass body is mounted on the toothed belt at a position where it moves in the opposite direction to the belt clamp when the door body performs an opening and closing action. The mass of the mass body is less than 10% of the mass of the door body.

7. The single-door device for an elevator according to claim 6, wherein, The toothed belt has a first end and a second end. The first end and the second end are connected by the mass body.

8. The single-door device for an elevator according to claim 6, wherein, The mass body has a stop portion. The stop is inserted between two adjacent teeth to restrict the movement of the mass relative to the toothed belt in the length direction of the toothed belt.

9. The single-door device for an elevator according to claim 7, wherein, The mass body has a stop portion. The stop is inserted between two adjacent teeth to restrict the movement of the mass relative to the toothed belt in the length direction of the toothed belt.

10. The single-door device for an elevator according to any one of claims 6 to 9, wherein, The elevator's single-door device also includes a door controller, which controls the opening and closing of the door body. The door controller maintains a fixed maximum speed for more than 0.5 seconds during the opening and closing of the door body.

11. A single-door device for an elevator, wherein, The single-door device of the elevator has: First pulley; The second pulley is arranged at a distance from the first pulley; A toothed belt is wound around the first pulley and the second pulley, and has multiple teeth; A clamp is attached to the toothed belt; The door body, connected to the toothed belt via the belt clamp, opens and closes by the movement of the toothed belt caused by the rotation of the first pulley and the second pulley; and A mass body, which is mounted on the toothed belt and moves together with the toothed belt. The mass body is mounted on the toothed belt at a position where it moves in the opposite direction to the belt clamp when the door body performs an opening and closing action. The mass of the mass body is more than 20% and less than 100% of the mass of each meter of the toothed belt.

12. The single-door device for an elevator according to claim 11, wherein, The toothed belt has a first end and a second end. The first end and the second end are connected by the mass body.

13. The single-door device for an elevator according to claim 11, wherein, The mass body has a stop portion. The stop is inserted between two adjacent teeth to restrict the movement of the mass relative to the toothed belt in the length direction of the toothed belt.

14. The single-door device for an elevator according to claim 12, wherein, The mass body has a stop portion. The stop is inserted between two adjacent teeth to restrict the movement of the mass relative to the toothed belt in the length direction of the toothed belt.

15. The single-door device for an elevator according to any one of claims 11 to 14, wherein, The elevator's single-door device also includes a door controller, which controls the opening and closing of the door body. The door controller maintains a fixed maximum speed for more than 0.5 seconds during the opening and closing of the door body.

16. A single-door device for an elevator, wherein, The single-door device of the elevator has: First pulley; The second pulley is arranged at a distance from the first pulley; A toothed belt is wound around the first pulley and the second pulley, and has multiple teeth; A clamp is attached to the toothed belt; The door body, connected to the toothed belt via the belt clamp, opens and closes by the movement of the toothed belt caused by the rotation of the first pulley and the second pulley; and A mass body, which is mounted on the toothed belt and moves together with the toothed belt. The mass body is mounted on the toothed belt at a position where it moves in the opposite direction to the belt clamp when the door body performs an opening and closing action. The mass body has a fastened component and fasteners fastened to the fastened component. The fastener is disposed only on the outer side of one end of the toothed belt in the width direction.

17. The single-door device for an elevator according to claim 16, wherein, The toothed belt has a first end and a second end. The first end and the second end are connected by the mass body.

18. The single-door device for an elevator according to claim 16 or 17, wherein, The elevator's single-door device also includes a door controller, which controls the opening and closing of the door body. The door controller maintains a fixed maximum speed for more than 0.5 seconds during the opening and closing of the door body.

19. A single-door device for an elevator, wherein, The single-door device of the elevator has: First pulley; The second pulley is arranged at a distance from the first pulley; A toothed belt is wound around the first pulley and the second pulley, and has multiple teeth; A clamp is attached to the toothed belt; The door body, connected to the toothed belt via the belt clamp, opens and closes by the movement of the toothed belt caused by the rotation of the first pulley and the second pulley; and A mass body, which is mounted on the toothed belt and moves together with the toothed belt. The mass body is mounted on the toothed belt at a position where it moves in the opposite direction to the belt clamp when the door body performs an opening and closing action. The mass body has an annular connecting member and a connected component that is connected to the toothed belt via the connecting member. A recess is formed on the surface of the connected component opposite to the toothed belt. The connector is inserted between two adjacent teeth and into the recess.

20. The single-door device for an elevator according to claim 19, wherein, The toothed belt has a first end and a second end. The first end and the second end are connected by the mass body.

21. The single-door device for an elevator according to claim 19 or 20, wherein, The elevator's single-door device also includes a door controller, which controls the opening and closing of the door body. The door controller maintains a fixed maximum speed for more than 0.5 seconds during the opening and closing of the door body.

22. A single-door device for an elevator, wherein, The single-door device of the elevator has: First pulley; The second pulley is arranged at a distance from the first pulley; A toothed belt is wound around the first pulley and the second pulley, and has multiple teeth; A clamp is attached to the toothed belt; The door body, connected to the toothed belt via the belt clamp, opens and closes by the movement of the toothed belt caused by the rotation of the first pulley and the second pulley; and A mass body, which is mounted on the toothed belt and moves together with the toothed belt. The mass body is mounted on the toothed belt at a position where it moves in the opposite direction to the belt clamp when the door body performs an opening and closing action. The mass body has a fastened component and fasteners fastened to the fastened component. The fastener is configured parallel to the width direction of the toothed belt and is inserted between two adjacent teeth of the belt.

23. The single-door device for an elevator according to claim 22, wherein, The toothed belt has a first end and a second end. The first end and the second end are connected by the mass body.

24. The single-door device for an elevator according to claim 22 or 23, wherein, The elevator's single-door device also includes a door controller, which controls the opening and closing of the door body. The door controller maintains a fixed maximum speed for more than 0.5 seconds during the opening and closing of the door body.

25. A single-door device for an elevator, wherein, The single-door device of the elevator has: First pulley; The second pulley is arranged at a distance from the first pulley; A toothed belt is wound around the first pulley and the second pulley, and has multiple teeth; With a clamp, which is mounted on the toothed belt; and The door body is connected to the toothed belt via the belt clamp, and its opening and closing action is achieved by the movement of the toothed belt caused by the rotation of the first pulley and the second pulley. A weight portion is provided along a portion of the length of the toothed belt. The mass per unit length of the weighted portion is more than twice the mass per unit length of the toothed belt excluding the weighted portion. The weight portion is located in a position that moves in the opposite direction to the clamp when the door body is opened or closed.

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