JP7475548B2 - Elevator single door device - Google Patents

Description

This disclosure relates to a single-leaf door device for an elevator.

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

JP 2008-168957 A

In conventional car door opening and closing devices such as those described above, when the car door is opening and closing at a constant speed, the string vibration of the toothed belt resonates with the excitation vibration caused by the meshing of the toothed belt with a pair of pulleys, causing noise.

The present disclosure has been made to solve the problems described above, and aims to provide a single-leaf elevator door device that can suppress vibration of the toothed belt.

The single-leaf door device for an elevator according to the present disclosure comprises a first pulley, a second pulley arranged at a distance from the first pulley, a toothed belt wound around the first pulley and the second pulley and having a plurality of belt teeth, a belt gripper attached to the toothed belt, a door body connected to the toothed belt via the belt gripper and opened and closed by movement of the toothed belt due to rotation of the first pulley and the second pulley, and a mass body attached to the toothed belt and moving together with the toothed belt, the mass body being attached to the toothed belt at a position where it moves in the opposite direction to the belt gripper when the door body is opened or closed.

The elevator single-leaf door device disclosed herein can suppress vibration of the toothed belt.

1 is a schematic diagram showing an elevator according to a first embodiment of the present invention; FIG. 2 is a front view of the car door device of FIG. 1 as viewed from the landing 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 an upper portion of the toothed belt of FIG. 2 . FIG. 5 is a model diagram showing the balance of forces at the three mass points in FIG. 4. FIG. 3 is a model diagram showing a case where one fixed end of the model showing the upper portion of the toothed belt in FIG. 2 is displaced and vibrated. 7 is a graph showing the change in displacement over time at the five mass points in FIG. 6 . 4 is a graph showing an example of a relationship between a door opening/closing time, a door speed, and a motor torque. FIG. 3 is a side view of the mass of FIG. 2 . 10 is a cross-sectional view taken along line XX in 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 taken along line XII-XII in FIG. 11. FIG. 3 is a side view showing a second modified example of the mass body of FIG. 2 . 14 is a cross-sectional view taken along line XIV-XIV in FIG. 13. FIG. 3 is a side view showing a third modified example of the mass body of FIG. 2 . 16 is a cross-sectional view taken along line XVI-XVI in FIG. 15. FIG. 13 is a side view showing an example of a mass body attached to a jointed toothed belt. FIG. 11 is a side view showing a main part of a toothed belt according to a second embodiment.

Hereinafter, embodiments will be described with reference to the drawings.
Embodiment 1.
Fig. 1 is a schematic diagram showing an elevator according to embodiment 1. In the figure, a machine room 2 is provided above a hoistway 1. In the machine room 2, a hoist 3, a deflector sheave 4, and an elevator control device 5 are installed.

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

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

The car 8 and counterweight 9 are suspended by a suspension body 7 and move up and down in the elevator shaft 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 elevator 1. The pair of car guide rails guide the ascent and descent of the car 8. The pair of counterweight guide rails guide the ascent and descent of the counterweight 9.

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

A door controller 13 is provided on the car 8.

A landing door device 14 is provided at each of the landings on multiple floors. 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 lands on the floor.

Figure 2 is a front view of the car door device 12 in Figure 1 as viewed from the landing side, showing the car door device 12 in a fully closed state. Figure 3 is a front view showing the car door device 12 in Figure 2 in a fully open state. The car door device 12 in embodiment 1 is a single-leaf door device.

The car door device 12 has a door controller 13, a door girder 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, a belt gripper 28, a linkage mechanism (not shown), and a mass body 29.

The door girder 21 is fixed to the top of the car chamber 11. A door rail 21a is formed on the door girder 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 is 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 a direction parallel to the Y axis in FIG. 2.

The second pulley 24 is provided on the door girder 21. The second pulley 24 is disposed at a distance 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. 2.

The center of rotation of the second pulley 24 is parallel to the center of rotation of the first pulley 23. The first pulley 23 and the second pulley 24 are disposed 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. 2.

The toothed belt 25 is wound around the first pulley 23 and the second pulley 24. The toothed belt 25 circulates due to the rotation of the first pulley 23 and the second pulley 24. The toothed belt 25 has a plurality of belt teeth 25a as shown in Fig. 9. Each of the first pulley 23 and the second pulley 24 is provided with a plurality of pulley teeth (not shown).

When the first door body 26 is in the fully closed position, it is located closer to the door stop than the second door body 27. In other words, when the second door body 27 is in the fully closed position, it is located closer to the door pocket than the first door body 26.

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 slower 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 upper part 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 upper part of the second door panel 33.

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

The first door body 26 and the second door body 27 are suspended from the door rail 21a. Furthermore, during opening and closing operations, the first door body 26 and the second door body 27 are guided by the door rail 21a and move in the width direction of the car 8. In other words, the opening and closing operation direction of the first door body 26 and the second door body 27 is a direction parallel to the X-axis in FIG. 2.

The belt gripper 28 is attached to the toothed belt 25 at either the upper or lower portion of the toothed belt 25. In the first embodiment, the belt gripper 28 is attached to the lower portion of the toothed belt 25.

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.

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 the belt gripper 28. As a result, the first door body 26 opens and closes 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 a driving force that opens and closes the first door body 26.

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

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

In addition, the mass body 29 is attached to the toothed belt 25 at a position that 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 or closed.

When the first door body 26 is in the fully closed position, the belt grip 28 is located closer to the first pulley 23 than the midpoint 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 closer to the second pulley 24 than the midpoint between the first pulley 23 and the second pulley 24.

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. Figure 4 is a model diagram showing the upper part of the toothed belt 25 in Figure 2. In Figure 4, the fixed end on the right side corresponds to the first pulley 23. Also, the fixed end on the left side corresponds to the second pulley 24.

Assume that multiple mass points are set at regular intervals on the upper part 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+1th mass point. _{y i} indicates the vertical displacement of the i-th mass point.

Figure 5 is a model diagram showing the balance of forces at the three mass points in Figure 4. In Figure 5, Δx is the distance between adjacent mass points. Furthermore, Δx is L/N, where N is the number of divisions of the model. N is a natural number. y is the vertical displacement of each mass point. T is the horizontal force acting on each mass point, i.e., the tension of the toothed belt 25. F is the vertical external force acting on each mass point.

From the balance of forces in Figure 5, the equation of motion for the vertical displacement y of the mass point is given by equation (1).

Here, during the opening and closing operation of the first door body 26, no vertical external force acts on the toothed belt 25. Therefore, if 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 constant value, equation (2) is obtained.

From equation (2), we can see that the displacement _yi of the i-th mass point is determined depending on the displacement _yi-1 of the i-1th mass point and the displacement yi _{+1 of the i} +1th mass point. This is the same for all mass points. In other words, the displacement y of each mass point is determined by the displacement y of the two adjacent mass points.

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

In particular, the door motor 22 generates a torque that drives the first door body 26, so the toothed belt 25 is vibrated in the vertical direction by the door motor 22. This displacement vibration is expressed by the following equation.

Substituting equation (3) into equation (2), we obtain equation (4).

Since the tension T and the spacing Δx are both constant values, it can be seen from equation (4) that in order to reduce the vertical acceleration of the mass point due to the displacement excitation at the fixed end and reduce the amount of vertical displacement of the mass point, it is necessary to increase the mass of the mass point.

Figure 6 is a model diagram showing the case where one fixed end of the model showing the upper part of the toothed belt 25 in Figure 2 is displaced and vibrated. Figure 7 is a graph showing the change in displacement over time at the five mass points in Figure 6. In Figure 7, the dotted line shows the case where all mass points have the same mass. Also, the solid line shows the case where only the mass of the i-th mass point is larger than the masses of the other four mass points.

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

Next, the vibration of the entire toothed belt 25 when the mass of the toothed belt 25 is partially increased will be explained using equations (5) to (9). In this example, the mass of the i-th mass point is larger than the mass of the other mass points. In addition, the masses of the other four mass points excluding the i-th mass point are equal.

Equation (5) shows the displacement of the i-th mass point in Figure 6.

Equation (6) shows the displacement of the (i+1)th mass point in Figure 6.

Equation (7) shows the displacement of the (i+2)th mass point in Figure 6.

Equation (8) shows the displacement of the (i+3)th mass point in Figure 6.

Equation (9) shows the displacement of the (i+4)th mass point in Figure 6.

When the displacement y _i of the i-th mass point, i.e., 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 y _i+1 of the i+1-th mass point becomes smaller, the displacement y _i+2 of the i+2-th mass point also becomes smaller. Similarly, the displacement y _i+3 of the i+3-th mass point and the displacement y i _{+4 of the i+4} -th mass point also become smaller in sequence.

In other words, by partially increasing the mass of the toothed belt 25, the input to adjacent mass points, i.e., the right-hand sides of equations (5) to (9), can be reduced, thereby reducing the vibration of the entire toothed belt 25.

In the car door device 12 of the first embodiment, a mass body 29 is attached to the toothed belt 25. The mass body 29 is disposed in a position where it moves in the opposite direction to the belt gripper 28 when the first door body 26 is opened or closed.

This makes it possible to suppress vibration of the toothed belt 25. This makes it possible to reduce noise generated during the opening and closing operations of the first door body 26 and the second door body 27.

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

For example, as shown in Figure 8, when the door opening and closing operation is composed of an acceleration region, a constant speed region, and a deceleration region, the maximum speed during the opening and closing operation of the first door body 26, i.e., the constant speed, is 400 mm/s. Also, the pitch of the multiple belt teeth 25a is 5 mm. In this case, the toothed belt 25 is vibrated at 80 Hz during the opening and closing operation of the first door body 26.

On the other hand, suppose that 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 tension T of the toothed belt 25 when the motor torque from the door motor 22 is constant is 150 N. In this case, 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. For this reason, the fifth-order component of the string vibration and the excitation frequency match, and there is a risk that the toothed belt 25 will vibrate significantly.

In contrast, in embodiment 1, a mass body 29 is attached to the toothed belt 25, thereby suppressing resonance between the string vibration and the excitation vibration caused by the meshing of the first pulley 23 and the second pulley 24 in the toothed belt 25.

In addition, the configuration is simple since only the mass body 29 is attached to the toothed belt 25.

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

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. Therefore, the deflection of the toothed belt 25 due to the mass of the mass body 29 can be sufficiently suppressed.

In addition, the door controller 13 maintains a constant maximum speed for 0.5 seconds or more during the opening and closing operation of the first door body 26. Therefore, by simply changing the time for which the constant maximum speed is maintained, it is possible to easily accommodate differences in the width dimensions of the car entrance and to easily set up the software for controlling the opening and closing operation.

However, in a control method that lengthens the time for which a constant maximum speed is maintained, if the above-mentioned excitation vibration and string vibration resonate, that state is maintained and the vibration becomes large. In contrast, in the first embodiment, 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.

The specific configuration of the mass body 29 will be described below. Figure 9 is a side view showing the mass body 29 of Figure 2. Figure 10 is a cross-sectional view taken along line X-X of Figure 9.

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 attached to the surface opposite the belt teeth 25a of the toothed belt 25. The first member 41 has a plurality of through holes 41a.

The second member 42 has a flat base portion 42a and multiple protrusions 42b as stoppers. The base portion 42a is in contact with the tip surfaces of the multiple belt teeth 25a. The multiple protrusions 42b each protrude from the base portion 42a toward the first member 41.

Each protrusion 42b is inserted into a recess between two adjacent belt teeth 25a and engages with the recess. That is, the multiple protrusions 42b mesh with the multiple belt teeth 25a. As a result, the multiple belt teeth 25a restrict the movement of the mass body 29 relative 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. 9.

The base portion 42a is provided with a plurality of screw holes 42c. For example, a bolt is used as each fastener 43. Each fastener 43 is passed through a corresponding through hole 41a and screwed into a corresponding screw hole 42c. Each fastener 43 is disposed on the outside of the toothed belt 25 in the width direction of the toothed belt 25. The width direction of the toothed belt 25 is parallel to the depth direction of the car 8 and is parallel to the Y axis in FIG. 10.

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

With such a mass body 29, it is possible to suppress the shifting of the mass body 29 relative to the toothed belt 25.

Figure 11 is a side view showing a first modified example of the mass body 29 of Figure 2. Figure 12 is a cross-sectional view taken along line XII-XII of Figure 11.

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

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

The first portion 44a is attached to the surface of the toothed belt 25 opposite the belt teeth 25a. The second portion 44b is attached to the tip surface of the belt teeth 25a. The connecting portion 44c connects the first portion 44a and the second portion 44b.

The first portion 44a has a plurality of through holes 44d. The second portion 44b has a plurality of screw holes 44e.

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

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

In the mass body 29 of the first modified example, multiple fasteners 45 are arranged only on the outside of one end of the width direction of the toothed belt 25, thereby preventing the mass body 29 from interfering with other equipment.

In addition, the second portion 44b may be provided with multiple protrusions as stopper portions, as shown in Figure 9.

Figure 13 is a side view showing a second modified example of the mass body 29 of Figure 2. Figure 14 is a cross-sectional view along line XIV-XIV of Figure 13.

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

The connected member 47 has a flat plate-shaped main portion 47a, a first protruding portion 47b, and a second protruding portion 47c.

The main portion 47a is attached to the surface of the toothed belt 25 opposite the belt teeth 25a. The first protrusion 47b and the second protrusion 47c are spaced apart from each other in the longitudinal direction of the toothed belt 25 and protrude from the main portion 47a toward the opposite side of the toothed belt 25.

A recess 47d is formed on the surface 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 of the connected member 47.

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

Each connector 46 is inserted between two adjacent belt teeth 25a, thereby restricting the movement of the mass body 29 relative to the toothed belt 25 in the longitudinal direction of the toothed belt 25. In other words, each connector 46 functions as a stopper portion.

The mass body 29 of the second modified example can also suppress the misalignment of the mass body 29 with respect to the toothed belt 25. 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.

Figure 15 is a side view showing a third modified example of the mass body 29 of Figure 2. Figure 16 is a cross-sectional view along line XVI-XVI of Figure 15.

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

The fastened member 48 has a flat main portion 48a, a flat first protrusion portion 48b, and a flat second protrusion portion 48c.

The main portion 48a is attached to the surface of the toothed belt 25 opposite the belt teeth 25a. The first protrusion 48b and the second protrusion 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. The toothed belt 25 is passed between the first protrusion 48b and the second protrusion 48c.

The first protrusion 48b has a plurality of through holes 48d. The second protrusion 48c has a plurality of screw holes 48e.

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

Moreover, each fastener 49 is arranged parallel to the width direction of the toothed belt 25 and is inserted between two adjacent belt teeth 25a. This restricts the movement of the mass body 29 relative to the toothed belt 25 in the longitudinal direction of the toothed belt 25. In other words, each fastener 49 functions as a stopper portion.

The mass body 29 of the third modified example can also suppress the misalignment of the mass body 29 with respect to the toothed belt 25. 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.

Note that each fastener 43 in Fig. 9, each fastener 45 in Fig. 11, and each fastener 49 in Fig. 15 may be provided with a rotation stopper. This can prevent the mass body 29 from falling off the toothed belt 25.

9 to 16, a seamless belt is used as the toothed belt 25. The seamless toothed belt 25 is endless before being 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 made easier.

On the other hand, as shown in Fig. 17, a belt with a joint may be used as the toothed belt 25. The toothed belt 25 in Fig. 17 has a first end 25b and a second end 25c. The first end 25b and the second end 25c are connected by a mass body 29. In addition, the multiple protrusions 42b mesh with the multiple belt teeth 25a, thereby preventing the first end 25b and the second end 25c from slipping out of the mass body 29.

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

Embodiment 2.
Next, Fig. 18 is a side view showing a main part of the toothed belt 25 according to the embodiment 2. Except for the configuration of the toothed belt 25 shown in Fig. 18, the configuration of the car door device 12 and the configuration of the elevator are similar to those of the embodiment 1.

In the second embodiment, a weight portion 25d is provided at a portion in the longitudinal direction of the toothed belt 25. The mass per unit length of the weight portion 25d is set to _M1 . The mass per unit length of the other portion 25e is set to _M0 . The other portion 25e is the portion of the toothed belt 25 excluding the weight portion 25d.

The mass _M1 is set to be at least twice the mass _M0 by, for example, making the material density of the weight portion 25d higher than the material density of the other portion 25e, i.e., _M1 ≧2× _M0 .

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

With this configuration, the same effect as in embodiment 1 can be obtained. In addition, the number of parts can be reduced.

In addition, when a toothed belt is used in 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.

The door motor 22 shown in Figures 2 and 3 is a thin motor. A thin motor is a motor whose dimension in a direction parallel to the rotation axis is smaller than the dimension in a direction perpendicular to the rotation axis. However, the door motor 22 may be an elongated motor. An elongated motor is a motor whose dimension in a direction parallel to the rotation axis is larger than the dimension in a direction perpendicular to the rotation axis.

2 and 3, the rotation shaft of the door motor 22 is arranged parallel to the depth direction of the car 8. However, the orientation of the rotation shaft of the door motor 22 may be changed by interposing a gear (not shown) between the door motor 22 and the first pulley 23.

In the car door device 12 shown in Figures 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 speed reduction mechanism has a first transmission belt and a speed reduction pulley. The diameter of the speed 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 speed reduction pulley.

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

In addition, 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.

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

The number of door bodies may be one or three or more.

In addition, the overall layout of the elevator is not limited to the layout in Figure 1. For example, the roping system may be a 2:1 roping system.

The elevator may also be a machine room-less elevator, a double deck elevator, a one-shaft multi-car elevator, etc. The one-shaft multi-car system is a system in which an upper car and a lower car located directly below the upper car each independently ascend and descend in a common elevator shaft.

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 portion, 26 first door body, 28 belt gripper, 29 mass body, 42b convex portion (stopper portion), 44 fastened member, 45 fastening device, 46 connecting device (stopper portion), 47 connected member, 47d recessed portion, 48 fastened member, 49 fastening device (stopper portion).

Claims (11)

First pulley,
a second pulley spaced apart 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 connected to the toothed belt via the belt gripper and opened and closed by movement of the toothed belt caused by rotation of the first pulley and the second pulley; and a mass body attached to the toothed belt and moving together with the toothed belt,
The mass body is attached to the toothed belt at a position where it moves in the opposite direction to the belt gripper during opening and closing of the door body,
An elevator single-door device in which the toothed belt is not connected by the mass body . The elevator single-door device according to claim 1, in which a seamless belt is used as the toothed belt. First pulley,
a second pulley spaced apart 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 that is connected to the toothed belt via the belt gripper and that opens and closes by movement of the toothed belt due to rotation of the first pulley and the second pulley; and
A mass body attached to the toothed belt and moving with the toothed belt.
Equipped with
The mass body is attached to the toothed belt at a position where it moves in the opposite direction to the belt gripper during opening and closing of the door body,
A single-leaf door device for an elevator, wherein the mass of the mass body is 10% or less of the mass of the door body. First pulley,
a second pulley spaced apart 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 that is connected to the toothed belt via the belt gripper and that opens and closes by movement of the toothed belt due to rotation of the first pulley and the second pulley; and
A mass body attached to the toothed belt and moving with the toothed belt.
Equipped with
The mass body is attached to the toothed belt at a position where it moves in the opposite direction to the belt gripper during opening and closing of the door body,
A single-leaf door device for an elevator , wherein the mass of the mass body is 20% or more and 100% or less of the mass per meter of the toothed belt. First pulley,
a second pulley spaced apart 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 that is connected to the toothed belt via the belt gripper and that opens and closes by movement of the toothed belt due to rotation of the first pulley and the second pulley; and
A mass body attached to the toothed belt and moving with the toothed belt.
Equipped with
The mass body is attached to the toothed belt at a position where the mass body moves in a direction opposite to the belt gripper during an opening/closing operation of the door body,
The mass body has a fastened member and a fastener fastened to the fastened member,
An elevator single-door device, wherein the fastener is disposed only on the outside of one end of the toothed belt in the width direction. First pulley,
a second pulley spaced apart 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 that is connected to the toothed belt via the belt gripper and that opens and closes by movement of the toothed belt due to rotation of the first pulley and the second pulley; and
A mass body attached to the toothed belt and moving with the toothed belt.
Equipped with
The mass body is attached to the toothed belt at a position where the mass body moves in a direction opposite to the belt gripper during an opening/closing operation of the door body,
The mass body has an endless connector and a connected member connected to the toothed belt by the connector,
A recess is formed on a surface of the connected member opposite to the toothed belt,
The coupling device is inserted between two adjacent belt teeth and into the recess. First pulley,
a second pulley spaced apart 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 that is connected to the toothed belt via the belt gripper and that opens and closes by movement of the toothed belt due to rotation of the first pulley and the second pulley; and
A mass body attached to the toothed belt and moving with the toothed belt.
Equipped with
The mass body is attached to the toothed belt at a position where it moves in the opposite direction to the belt gripper during opening and closing of the door body,
The mass body has a fastened member and a fastener fastened to the fastened member,
The fastener is arranged parallel to the width direction of the toothed belt and is inserted between two adjacent belt teeth. the toothed belt having a first end and a second end;
The single-leaf elevator door device according to any one of claims 3 to 7 , wherein the first end and the second end are connected by the mass body. The mass body has a stopper portion,
5. The elevator single-leaf door device according to claim 1, wherein the stopper portion is inserted between two adjacent belt teeth and restricts movement of the mass body relative to the toothed belt in the longitudinal direction of the toothed belt. A door controller for controlling the opening and closing operation of the door body is further provided.
10. The elevator single-leaf door device according to claim 1, wherein the door controller maintains a constant maximum speed for 0.5 seconds or more during an opening or closing operation of the door body. First pulley,
a second pulley spaced apart 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; and a door body connected to the toothed belt via the belt gripper and opened and closed by the movement of the toothed belt caused by the rotation of the first pulley and the second pulley,
A weight portion is provided at a portion of the toothed belt in the longitudinal direction,
a mass per unit length of the weight portion is equal to or greater than twice a mass per unit length of a portion of the toothed belt excluding the weight portion,
The weight portion is positioned at a position where it moves in the opposite direction to the belt gripper when the door body is opened or closed.

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