WO2022269686A1

WO2022269686A1 - One side opening-type door device for elevator

Info

Publication number: WO2022269686A1
Application number: PCT/JP2021/023411
Authority: WO
Inventors: 昌也北澤; 篤志柴田; 康司大塚; 正行菅原; 慎也天野
Original assignee: 三菱電機株式会社
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2022-12-29
Also published as: DE112021007859T5; CN117500742A; JPWO2022269686A1; JP7475548B2

Abstract

In this one side opening-type door device for an elevator, a belt grasping tool is attached to a toothed belt. A door body is connected to the toothed belt by means of the belt grasping tool and performs opening and closing actions by means of the movement of the toothed belt due to the rotation of a first pulley and a second pulley. A mass body is attached to the toothed belt and moves with the toothed belt. In addition, the mass body is attached to the toothed belt at a position where the mass body moves in the direction opposite to the belt grasping tool during the opening and closing actions of the door body.

Description

Elevator single swing door device

The present disclosure relates to a single-opening door device for an elevator.

In conventional car door opening and closing devices, an endless transmission cable is wound around a pair of pulleys. A car door is connected to the transmission cable. For example, a toothed belt is used as the transmission cable (see, for example, Patent Document 1).

JP 2008-168957 A

In the conventional car door opening/closing device as described above, when the car door is opened and closed at a constant speed, the string vibration of the toothed belt is added to the excitation vibration caused by the engagement between the toothed belt and the pair of pulleys. It may resonate and generate noise.

The present disclosure has been made in order to solve the above-described problems, and aims to obtain a single-opening door device for an elevator capable of suppressing vibration of a toothed belt.

An elevator single-opening door apparatus according to the present disclosure is wound around a first pulley, a second pulley spaced from the first pulley, the first pulley, and the second pulley, and a toothed belt having a plurality of belt teeth, a belt gripper attached to the toothed belt, a belt gripper connected to the toothed belt via the belt gripper, and a A door body that opens and closes by movement of the toothed belt, and a mass attached to the toothed belt that moves with the toothed belt, the mass oriented in an opposite direction to the belt gripper during the opening and closing movement of the door body. It is attached to the toothed belt in a position to move to.

According to the elevator single-opening door device of the present disclosure, vibration of the toothed belt can be suppressed.

1 is a schematic configuration diagram showing an elevator according to Embodiment 1; FIG. It is the front view which looked at the car door apparatus of FIG. 1 from the hall side. Fig. 3 is a front view showing a fully open state of the car door device of Fig. 2; FIG. 3 is a model diagram showing the upper portion of the toothed belt of FIG. 2; FIG. 5 is a model diagram showing balance of forces at three mass points in FIG. 4; FIG. 3 is a model diagram showing a case where one fixed end is displaced and vibrated in the model showing the upper portion of the toothed belt in FIG. 2 ; FIG. 7 is a graph showing changes in displacement over time at five mass points in FIG. 6; FIG. 5 is a graph showing an example of the relationship between door opening/closing time, door speed, and motor torque; 3 is a side view of the mass body of FIG. 2; FIG. FIG. 10 is a cross-sectional view along line XX of FIG. 9; FIG. 3 is a side view showing a first modified example of the mass body of FIG. 2; 12 is a cross-sectional view along line XII-XII of FIG. 11; FIG. 3 is a side view showing a second modification of the mass body of FIG. 2; FIG. FIG. 14 is a cross-sectional view along line XIV-XIV in FIG. 13; 3 is a side view showing a third modified example of the mass body of FIG. 2; FIG. FIG. 16 is a cross-sectional view along line XVI-XVI of FIG. 15; FIG. 4 is a side view showing an example in which mass bodies are attached to a jointed toothed belt; FIG. 11 is a side view showing a main part of a toothed belt according to Embodiment 2;

Embodiments will be described below with reference to the drawings.
Embodiment 1.
FIG. 1 is a schematic configuration diagram showing an elevator according to Embodiment 1. FIG. In the figure, a machine room 2 is provided above the hoistway 1 . In the machine room 2, a hoisting machine 3, a deflection wheel 4, and an elevator control device 5 are installed.

The hoisting machine 3 has a drive sheave 6, a hoisting machine motor (not shown), and a hoisting machine brake (not shown). The hoist motor rotates the drive sheave 6 . The hoist brake keeps the drive sheave 6 stationary. Also, the hoist brake brakes the rotation of the drive sheave 6 .

A suspension 7 is wound around the drive sheave 6 and the deflector wheel 4 . A plurality of ropes or a plurality of belts are used as the suspension 7 . A car 8 is connected to a first end of the suspension 7 . A counterweight 9 is connected to the second end of the suspension 7 .

The car 8 and the counterweight 9 are suspended by a suspension 7 and move up and down in the hoistway 1 by rotating the drive sheave 6 . The elevator control device 5 controls the operation of the car 8 by controlling the hoisting machine 3 .

A pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown) are installed in the hoistway 1 . A pair of car guide rails guides the rise and fall of the car 8 . A pair of counterweight guide rails guides the lifting and lowering of the counterweight 9 .

The car 8 has a car frame 10 and a car room 11. A suspension 7 is connected to the car frame 10 . The car room 11 is supported by the car frame 10 . A car door device 12 is provided in the car room 11 . The car door device 12 opens and closes the doorway of the car.

A door controller 13 is provided on the car 8.

A landing door device 14 is provided for each of the multi-floor landings. Each landing door device 14 opens and closes the corresponding landing doorway. Further, each hall door device operates in conjunction with the car door device 12 when the car 8 lands on the floor.

FIG. 2 is a front view of the car door device 12 of FIG. 1 as seen from the hall side, and shows the car door device 12 in a fully closed state. FIG. 3 is a front view showing the fully open state of the car door device 12 of FIG. The car door device 12 of Embodiment 1 is a single-opening door device.

The car door device 12 includes a door controller 13, a door beam 21, a door motor 22, a first pulley 23, a second pulley 24, an endless toothed belt 25, a first door body 26, a second door body 27, and a belt gripper. 28 , an interlocking mechanism (not shown), and a mass body 29 .

The door beam 21 is fixed to the upper part of the car room 11. A door rail 21 a is formed on the door beam 21 .

The door motor 22 is fixed to the door beam 21. The first pulley 23 is fixed to the rotating shaft of the door motor 22 and rotated by the door motor 22 . The center of rotation of the first pulley 23 is parallel to the depth direction of the car 8 and horizontal. The depth direction of the car 8 is parallel to the Y-axis in FIG.

The second pulley 24 is provided on the door beam 21. The second pulley 24 is spaced apart from the first pulley 23 in the opening/closing direction of the first door body 26 and the second door body 27 . The opening/closing direction of the first door body 26 and the second door body 27 is parallel to the width direction of the car 8 and parallel to the X-axis in FIG.

Also, the center of rotation of the second pulley 24 is parallel to the center of rotation of the first pulley 23 . Also, the first pulley 23 and the second pulley 24 are arranged at the same position in the height direction of the car 8 . The height direction of the car 8 is the vertical direction, which is parallel to the Z-axis in FIG.

The toothed belt 25 is wound around the first pulley 23 and the second pulley 24 . Further, the toothed belt 25 circulates due to the rotation of the first pulley 23 and the second pulley 24 . Further, the toothed belt 25 has a plurality of belt teeth 25a as shown in FIG. Each of the first pulley 23 and the second pulley 24 is provided with a plurality of pulley teeth (not shown).

The first door body 26 is positioned closer to the door stop than the second door body 27 when positioned at the fully closed position. That is, the second door main body 27 is positioned closer to the door case than the first door main body 26 when positioned at the fully closed position.

The first door body 26 moves faster than the second door body 27 during opening and closing operations. That is, the first door body 26 is a high speed door. The second door body 27 moves at a lower speed than the first door body 26 during opening and closing operations. That is, the second door body 27 is a low speed door.

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 top of the first door panel 31 .

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 top of the second door panel 33 .

The first door hanger 32 and the second door hanger 34 are each provided with a plurality of door rollers (not shown). When the first door body 26 and the second door body 27 are opened and closed, the plurality of door rollers move while rolling on the door rail 21a.

The first door body 26 and the second door body 27 are suspended from the door rail 21a. Further, the first door body 26 and the second door body 27 move in the width direction of the car 8 while being guided by the door rail 21a during the opening/closing operation. That is, the opening/closing direction of the first door body 26 and the second door body 27 is parallel to the X-axis in FIG.

A belt gripper 28 is attached to the toothed belt 25 at one of the upper and lower parts of the toothed belt 25 . In the first embodiment, belt gripper 28 is attached to the lower portion of toothed belt 25 .

The lower part of the toothed belt 25 is the part positioned below the first pulley 23 and the second pulley 24 when the first door body 26 is positioned at the fully closed position. The upper portion of the toothed belt 25 is positioned above the first pulley 23 and the second pulley 24 when the first door body 26 is positioned at the fully closed position.

Also, the belt gripper 28 is fixed to the first door hanger 32 . The first door body 26 is connected to the toothed belt 25 via a belt catch 28 . As a result, the first door main body 26 is opened and closed by the movement of the toothed belt 25 caused by the rotation of the first pulley 23 and the second pulley 24 . The door motor 22 generates driving force for opening and closing the first door body 26 .

The opening/closing operation of the first door body 26 is transmitted to the second door body 27 via the interlocking mechanism. As a result, the second door body 27 opens and closes in conjunction with the first door body 26 .

The door controller 13 controls the opening/closing operation of the first door body 26 by controlling the door motor 22 . Further, the door controller 13 maintains a constant maximum speed for 0.5 seconds or more during the opening/closing operation of the first door body 26 .

The mass 29 is attached to the toothed belt 25 at a position where it moves in the direction opposite to the belt gripper 28 when the first door body 26 is opened and closed. That is, mass 29 is attached to toothed belt 25 at the other of the upper and lower portions of toothed belt 25 . In the first embodiment, mass 29 is attached to the upper portion of toothed belt 25 . Masses 29 move with toothed belt 25 .

Also, the mass body 29 is attached to 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 opened and closed.

The belt gripper 28 is positioned closer to the first pulley 23 than midway between the first pulley 23 and the second pulley 24 when the first door body 26 is positioned at the fully closed position. The mass body 29 is positioned closer to the second pulley 24 than midway between the first pulley 23 and the second pulley 24 when the first door body 26 is positioned at the fully closed position.

The mass of the mass body 29 is 10% or less of the mass of the first door body 26. In addition, the mass of the mass body 29 is 20% or more and 100% or less of the mass per meter of the toothed belt 25 .

Next, the action of the mass body 29 will be explained. FIG. 4 is a model diagram showing the upper portion of the toothed belt 25 of FIG. In FIG. 4 , the right fixed end corresponds to the first pulley 23 . Also, the left fixed end corresponds to the second pulley 24 .

Assume that a plurality of mass points are set at regular intervals in the upper portion of the length L. m _i is the mass of the i-th mass point. m _i-1 is the mass of the i-1th mass point. m _i+1 is the mass of the i+1 th mass point. y _i indicates the amount of vertical displacement of the i-th mass point.

FIG. 5 is a model diagram showing the force balance at the three mass points in FIG. In FIG. 5, Δx is the distance between adjacent mass points. Also, Δx is L/N, where N is the number of divisions of the model. N is a natural number. y is the amount of displacement in the vertical direction of each mass point. T is the horizontal force acting on each mass point, that is, the tension of the toothed belt 25; F is the vertical external force acting on each mass point.

　From the force balance in Fig. 5, the equation of motion regarding the displacement amount y of the mass point in the vertical direction is obtained as formula (1).

Here, no external force acts on the toothed belt 25 in the vertical direction during the opening/closing operation of the first door body 26 . Therefore, assuming that the external force acting on the mass point is 0 and the tension T of the toothed belt 25 is a constant value, the equation (2) is obtained.

From the equation (2), the displacement _yi of the i-th mass point is determined depending on the displacement _yi-1 of the (i-1)-th mass point and the displacement yi+1 of the ( _i +1)-th mass point. I understand. This is the same for any mass point. That is, the displacement y of each mass point is determined by the displacement y of two adjacent mass points.

Here, in equation (2), consider the case where the i-1-th mass point is the fixed end, and this fixed end is subjected to displacement and vibration. In the car door device 12 , this corresponds to vibration of the toothed belt 25 by the door motor 22 and the first pulley 23 or the second pulley 24 .

In particular, since the door motor 22 generates torque for driving the first door body 26, the toothed belt 25 is vertically vibrated by the door motor 22. This displacement excitation is represented by the following equation.

By substituting formula (3) into formula (2), formula (4) is obtained.

Since the tension T and the interval Δx are constant values, from the equation (4), in order to reduce the vertical acceleration of the mass point due to the displacement excitation at the fixed end and to reduce the amount of vertical displacement of the mass point, It can be seen that the mass of the mass point should be increased.

FIG. 6 is a model diagram showing a case where one fixed end is displaced and vibrated in the model showing the upper portion of the toothed belt 25 in FIG. FIG. 7 is a graph showing changes in displacement over time at five mass points in FIG. In FIG. 7, the dotted line indicates the case where the masses of all mass points are equal. Also, the solid line indicates the case where only the mass of the i-th mass point is greater than the masses of the other four mass points.

As shown in FIG. 7, when the mass of one mass point is greater than the mass of the other mass points, the displacement y of each mass point in the vertical direction is smaller than when the masses of all mass points are equal. From this result, as shown in the formula (4), when the toothed belt 25 is displaced and vibrated, the effect of suppressing the vibration can be obtained by partially increasing the mass of the toothed belt 25. I understand.

Next, the state of vibration of the entire toothed belt 25 when the mass of the toothed belt 25 is partially increased will be described using equations (5) to (9). In this example, the mass of the i-th mass point is greater than the masses of the other mass points. Also, the masses of the four mass points other than the i-th mass point are uniform.

Expression (5) indicates the amount of displacement of the i-th mass point in FIG.

Expression (6) indicates the amount of displacement of the i+1-th mass point in FIG.

Expression (7) indicates the amount of displacement of the i+2-th mass point in FIG.

Expression (8) indicates the amount of displacement of the i+3-th mass point in FIG.

Expression (9) indicates the amount of displacement of the i+4th mass point in FIG.

When the displacement y _i of the i-th mass point, ie, the amplitude, becomes smaller, the input y _i to the i+1-th mass point becomes smaller, so the displacement y _i+1 of the i+1-th mass point also becomes smaller. Furthermore, as the displacement yi+1 of the _i +1-th mass point decreases, the displacement yi+2 of the _i +2-th mass point also decreases. Thereafter, the displacement amount y _i+3 of the i+3-th mass point and the displacement amount y _i+ 4 of the i+4-th mass point also decrease in sequence.

That is, by partially increasing the mass of the toothed belt 25, the inputs to adjacent mass points, that is, the right sides of the equations (5) to (9) can be decreased. Vibration can be reduced.

In the car door device 12 of Embodiment 1, the mass body 29 is attached to the toothed belt 25 . Further, the mass body 29 is arranged at a position where it moves in the direction opposite to the belt gripper 28 when the first door body 26 is opened and closed.

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

Here, FIG. 8 is a graph showing an example of the relationship between door opening/closing time, door speed, and motor torque.

For example, as shown in FIG. 8, when the door opening/closing operation is composed of an acceleration region, a constant speed region, and a deceleration region, the maximum speed during the opening/closing operation of the first door body 26, that is, the constant speed is 400 mm/mm. s. It is also assumed that the pitch of the plurality of belt teeth 25a is 5 mm. In this case, the toothed belt 25 is vibrated at 80 Hz when the first door body 26 is opened and closed.

On the other hand, when the linear density ρ of the toothed belt 25 is 0.065 kg/m, the fixed pitch L which is the distance between the center of the first pulley 23 and the center of the second pulley 24 is 1500 mm, and the motor torque of the door motor 22 is constant. Assume that the tension T of the toothed belt 25 is 150N. At this time, the natural frequency of the string vibration of the toothed belt 25 is 1/2L×α=16 Hz, where α is the square root of T/ρ. Therefore, there is a possibility that the fifth-order component of the string vibration and the excitation frequency will match, causing the toothed belt 25 to vibrate greatly.

On the other hand, in Embodiment 1, since the mass body 29 is attached to the toothed belt 25, in the toothed belt 25, excitation vibration due to meshing with the first pulley 23 and the second pulley 24, Resonance with string vibration is suppressed.

Also, since the mass body 29 is simply attached to the toothed belt 25, the configuration is simple.

Further, the mass of the mass body 29 is 10% or less of the mass of the first door body 26. Therefore, bending of the toothed belt 25 due to the mass of the mass body 29 can be suppressed.

Also, the mass of the mass body 29 is 20% or more and 100% or less of the mass of the toothed belt 25 per meter. Therefore, bending of the toothed belt 25 due to the mass of the mass body 29 can be sufficiently suppressed.

Also, the door controller 13 maintains a constant maximum speed for 0.5 seconds or more during the opening/closing operation of the first door body 26 . Therefore, by simply changing the time for maintaining a constant maximum speed, it is possible to easily deal with differences in the width of the car entrance and exit, and it is possible to easily set the software for controlling the opening/closing operation. .

However, in a control method that lengthens the time to maintain a constant maximum speed, when the excitation vibration and the string vibration resonate, that state is maintained and the vibration increases. In contrast, in Embodiment 1, since the mass body 29 is attached to the toothed belt 25, it is possible to suppress the vibration of the toothed belt 25 while facilitating software settings.

A specific configuration of the mass body 29 will be described below. FIG. 9 is a side view of mass body 29 of FIG. 10 is a cross-sectional view taken along line XX of FIG. 9. FIG.

The mass body 29 has a flat first member 41 , a second member 42 and a plurality of fasteners 43 .

The first member 41 is applied to the surface of the toothed belt 25 opposite to the plurality of belt teeth 25a. The first member 41 is provided with a plurality of through holes 41a.

The second member 42 has a flat base portion 42a and a plurality of projections 42b as stopper portions. The base portion 42a is in contact with the tip surfaces of the plurality of belt teeth 25a. The plurality of convex portions 42b each protrude from the base portion 42a toward the first member 41 side.

Each protrusion 42b is inserted into a recess between two adjacent belt teeth 25a and fitted into the recess. That is, the plurality of protrusions 42b mesh with the plurality of belt teeth 25a. Thereby, the plurality of belt teeth 25 a restricts movement of the mass body 29 with respect to the toothed belt 25 in the longitudinal direction of the toothed belt 25 . The longitudinal direction of the toothed belt 25 is parallel to the X-axis in FIG.

A plurality of screw holes 42c are provided in the base portion 42a. A bolt, for example, is used as each fastener 43 . Each fastener 43 is passed through the corresponding through hole 41a and screwed into the corresponding screw hole 42c. Each fastener 43 is arranged outside the toothed belt 25 in the width direction of the toothed belt 25 . The width direction of the toothed belt 25 is the direction parallel to the depth direction of the car 8 and the direction parallel to the Y axis in FIG.

The toothed belt 25 is sandwiched between the first member 41 and the second member 42 by screwing each fastener 43 into the corresponding screw hole 42c.

According to such a mass body 29, the deviation of the mass body 29 with respect to the toothed belt 25 can be suppressed.

FIG. 11 is a side view showing a first modified example of the mass body 29 of FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. 11. FIG.

The mass body 29 in the first modified example has a member to be fastened 44 and a plurality of fasteners 45 .

The fastened member 44 has a flat plate-like first portion 44a, a flat plate-like second portion 44b, and a connecting portion 44c.

The first portion 44a is applied to the surface of the toothed belt 25 opposite to the plurality of belt teeth 25a. The second portion 44b is in contact with the tip surfaces of the plurality of belt teeth 25a. The connecting portion 44c connects the first portion 44a and the second portion 44b.

A plurality of through holes 44d are provided in the first portion 44a. A plurality of screw holes 44e are provided in the second portion 44b.

A bolt, for example, is used as each fastener 45 . Each fastener 45 is passed through the corresponding through hole 44d and screwed into the corresponding screw hole 44e. By screwing each fastener 45 into the corresponding threaded hole 44e, the toothed belt 25 is sandwiched between the first portion 44a and the second portion 44b.

A plurality of fasteners 45 are arranged only on the outside of one end in the width direction of the toothed belt 25 . The connecting portion 44c is positioned outside the other end portion of the toothed belt 25 in the width direction.

In the mass body 29 of the first modified example, since the plurality of fasteners 45 are arranged only outside one end of the toothed belt 25 in the width direction, the mass body 29 is prevented from interfering with other devices. can do.

It should be noted that, as in FIG. 9, the second portion 44b may be provided with a plurality of projections as stopper portions.

FIG. 13 is a side view showing a second modification of the mass body 29 of FIG. 14 is a cross-sectional view along line XIV-XIV in FIG. 13. FIG.

The mass body 29 in the second modified example has a pair of endless connectors 46 and a member 47 to be connected.

The connected member 47 has a flat main portion 47a, a first projecting portion 47b, and a second projecting portion 47c.

The main portion 47a is in contact with the surface of the toothed belt 25 opposite to the plurality of belt teeth 25a. The first projecting portion 47b and the second projecting portion 47c are spaced apart from each other in the longitudinal direction of the toothed belt 25 and project from the main portion 47a to the side opposite to the toothed belt 25 .

A concave portion 47 d is formed on the surface of the connected member 47 opposite to the toothed belt 25 . The recessed portion 47d is formed between the first protruding portion 47b and the second protruding portion 47c of the member 47 to be connected.

Each connector 46 holds the connected member 47 to the toothed belt 25 by surrounding the main portion 47 a and the toothed belt 25 . Each connector 46 is composed of, for example, a cord wound around the main portion 47 a and the toothed belt 25 . Each connector 46 is inserted between two adjacent belt teeth 25a of the toothed belt 25 and into the recess 47d.

The movement of the mass body 29 relative to the toothed belt 25 in the longitudinal direction of the toothed belt 25 is restricted by inserting each connector 46 between two adjacent belt teeth 25a. That is, each connecting tool 46 functions as a stopper portion.

The shift of the mass body 29 with respect to the toothed belt 25 can also be suppressed by the mass body 29 of the second modification. Further, it is possible to suppress an increase in the size of the mass body 29 in the width direction of the toothed belt 25, and to suppress interference between the mass body 29 and other devices.

FIG. 15 is a side view showing a third modified example of the mass body 29 of FIG. 16 is a cross-sectional view taken along line XVI--XVI of FIG. 15. FIG.

The mass body 29 in the third modified example has a member to be fastened 48 and a plurality of fasteners 49 .

The fastened member 48 has a flat plate-like main portion 48a, a flat plate-like first projecting portion 48b, and a flat plate-like second projecting portion 48c.

The main portion 48a is in contact with the surface of the toothed belt 25 opposite to the plurality of belt teeth 25a. The first protruding portion 48b and the second protruding portion 48c are spaced apart from each other in the width direction of the toothed belt 25 and protrude from the main portion 48a toward the toothed belt 25 side. The toothed belt 25 is passed between the first projecting portion 48b and the second projecting portion 48c.

A plurality of through holes 48d are provided in the first projecting portion 48b. A plurality of screw holes 48e are provided in the second projecting portion 48c.

A bolt, for example, is used as each fastener 49 . Each fastener 49 is passed through the corresponding through hole 48d and screwed into the corresponding screw hole 48e.

Each fastener 49 is arranged parallel to the width direction of the toothed belt 25 and inserted between two adjacent belt teeth 25a. Thereby, movement of the mass body 29 with respect to the toothed belt 25 in the longitudinal direction of the toothed belt 25 is restricted. That is, each fastener 49 functions as a stopper portion.

The shift of the mass body 29 with respect to the toothed belt 25 can also be suppressed by the mass body 29 of the third modification. Further, it is possible to suppress an increase in the size of the mass body 29 in the width direction of the toothed belt 25, and to suppress interference between the mass body 29 and other devices.

It should be noted that each fastener 43 in FIG. 9, each fastener 45 in FIG. 11, and each fastener 49 in FIG. 15 may each be provided with a detent. This can prevent the mass body 29 from coming off the toothed belt 25 .

Here, in the examples shown in Figs. 9 to 16, a seamless belt is used as the toothed belt 25. The seamless toothed belt 25 is endless before it is wound around the first pulley 23 and the second pulley 24 .

By using such a seamless toothed belt 25, the assembly work of the car door device 12 can be facilitated.

On the other hand, as shown in FIG. 17, as the toothed belt 25, a belt with a seam may be used. The toothed belt 25 of Figure 17 has a first end 25b and a second end 25c. A mass body 29 connects the first end portion 25b and the second end portion 25c. Moreover, the plurality of protrusions 42b mesh with the plurality of belt teeth 25a, thereby preventing the first end 25b and the second end 25c from coming off the mass body 29. As shown in FIG.

With such a configuration, the length of the toothed belt 25 can be easily adjusted.

Embodiment 2.
Next, FIG. 18 is a side view showing the essential parts of the toothed belt 25 according to Embodiment 2. As shown in FIG. The configuration of the car door device 12 and the configuration of the elevator are the same as those of the first embodiment except for the configuration of the toothed belt 25 shown in FIG.

A part of the toothed belt 25 in the second embodiment in the longitudinal direction is provided with a weight portion 25d. Let M ₁ be the mass per unit length of the weight portion 25d. Also, let M ₀ be the mass per unit length of the other portion 25e. The other portion 25e is a portion of the toothed belt 25 excluding the weight portion 25d.

The mass M ₁ is made more than twice the mass M ₀ by, for example, making the material density of the weight portion 25d higher than that of the other portion 25e. That is, M ₁ ≧2×M ₀ .

The weight part 25d is located at a position where it moves in the direction opposite to the belt gripper 28 when the first door body 26 is opened and closed. That is, the weight portion 25d is located at the same position as the mass body 29 in the first embodiment.

Even with such a configuration, the same effect as in the first embodiment can be obtained. Also, the number of parts can be reduced.

When a toothed belt is used for the landing door device 14, the mass body 29 of Embodiment 1 or the weight portion 25d of Embodiment 2 may be applied to the toothed belt of the landing door device 14.

Also, the door motor 22 shown in FIGS. 2 and 3 is a thin motor. A thin motor is a motor whose dimension in the direction parallel to the axis of rotation is smaller than the dimension in the direction perpendicular to the axis of rotation. However, the door motor 22 may be a body length motor. A body-length motor is a motor whose dimension in the direction parallel to the axis of rotation is larger than the dimension in the direction perpendicular to the axis of rotation.

In addition, in the car door device 12 shown in FIGS. 2 and 3, the rotating shaft of the door motor 22 is arranged parallel to the depth direction of the car 8 . However, by interposing a gear (not shown) between the door motor 22 and the first pulley 23, the direction of the rotating shaft of the door motor 22 may be changed.

Also, in the car door device 12 shown in FIGS. 2 and 3 , the first pulley 23 is directly rotated by the door motor 22 . However, a speed reduction mechanism (not shown) may 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.

When a speed reduction mechanism is provided between the door motor 22 and the first pulley 23, the door motor 22 may be arranged at a position away from the first pulley 23, for example, on the door beam 21.

Further, when a reduction mechanism is provided between the door motor 22 and the first pulley 23 , the reduction pulley may be arranged coaxially with the first pulley 23 . In this case, the first pulley 23 rotates together with the reduction pulley.

Also, when a speed reduction mechanism is provided between the door motor 22 and the first pulley 23 , the speed reduction pulley may be arranged at a position away from the first pulley 23 . In this case, the reduction mechanism has a transmission pulley and a second transmission belt in addition to the first transmission belt and reduction pulley. The transmission pulley is coaxially arranged with the reduction pulley and rotates therewith. The second transmission belt transmits rotation of the transmission pulley to the first pulley 23 .

Also, the number of door bodies may be one or three or more.

Also, the layout of the entire elevator is not limited to the layout in FIG. For example, the roping scheme may be a 2:1 roping scheme.

In addition, the elevator may be a machine room-less elevator, a double-deck elevator, a one-shaft multi-car elevator, or the like. The one-shaft multi-car system is a system in which an upper car and a lower car placed directly below the upper car independently ascend and descend a common hoistway.

12 car door device, 13 door controller, 23 first pulley, 24 second pulley, 25 toothed belt, 25a belt teeth, 25b first end, 25c second end, 25d weight part, 26 first door body, 28 belt gripper, 29 mass body, 42b convex portion (stopper portion), 44 fastened member, 45 fastener, 46 connector (stopper portion), 47 connected member, 47d concave portion, 48 fastened member, 49 fastener (stopper).

Claims

a first pulley;
a second pulley spaced from the first pulley;
a toothed belt that is wound around the first pulley and the second pulley and has a plurality of belt teeth;
a belt gripper attached to the toothed belt;
a door body which is connected to the toothed belt via the belt gripper and which opens and closes by movement of the toothed belt caused by rotation of the first pulley and the second pulley; and a mass that moves with the toothed belt;
An elevator single swing door system, wherein the mass is attached to the toothed belt in a position where it moves in a direction opposite to the belt gripper during opening and closing operations of the door body.
The single-opening elevator door apparatus according to claim 1, wherein a seamless belt is used as the toothed belt.
the toothed belt has a first end and a second end;
2. The elevator single-opening door system according to claim 1, wherein said first end and said second end are connected by said mass body.
The single-opening elevator door apparatus according to any one of claims 1 to 3, wherein the mass of the mass body is 10% or less of the mass of the door body.
5. The elevator single swing door apparatus according to any one of claims 1 to 4, wherein the mass of the mass body is 20% or more and 100% or less of the mass per meter of the toothed belt. .
The mass body has a stopper portion,
The stopper portion is inserted between two adjacent belt teeth, and restricts movement of the mass body with respect to the toothed belt in the longitudinal direction of the toothed belt. 6. The elevator single swing door system according to any one of the preceding items 5 to 5.
The mass body has a member to be fastened and a fastener that is fastened to the member to be fastened,
7. The elevator single opening door apparatus according to any one of claims 1 to 6, wherein the fastener is arranged only on the outside of one end in the width direction of the toothed belt.
The mass body has an endless connector and a connected member connected to the toothed belt by the connector,
A concave portion is formed on a surface of the connected member opposite to the toothed belt,
6. The elevator single swing door apparatus according to any one of claims 1 to 5, wherein the connector is inserted between two adjacent belt teeth and into the recess.
The mass body has a member to be fastened and a fastener that is fastened to the member to be fastened,
6. According to any one of claims 1 to 5, wherein the fasteners are arranged parallel to the width direction of the toothed belt and are inserted between two adjacent belt teeth. A single swing door system for the described elevator.
further comprising a door controller for controlling opening and closing operations of the door body,
10. The elevator single-opening door apparatus according to any one of claims 1 to 9, wherein the door controller maintains a constant maximum speed for 0.5 seconds or more during opening and closing operations of the door body.
a first pulley;
a second pulley spaced from the first pulley;
a toothed belt that is wound around the first pulley and the second pulley and has a plurality of belt teeth;
and a belt gripper attached to the toothed belt, and connected to the toothed belt via the belt gripper, by movement of the toothed belt due to rotation of the first and second pulleys. Equipped with a door body that opens and closes,
A weight portion is provided in a part of the toothed belt in the longitudinal direction,
The mass per unit length in the weight part is at least twice the mass per unit length in the portion of the toothed belt excluding the weight part,
A single-opening door apparatus for an elevator, wherein the weight portion is positioned to move in a direction opposite to the belt gripper when the door body is opened and closed.