JPH08259152A - Drive device for elevator door - Google Patents

Abstract

PURPOSE: To quietly open and close an elevator door without causing slippage between a pulley and a rope type power transmission body. CONSTITUTION: A drive device for an elevator door is furnished with a door support rail 2 from which an elevator door 3 is hung down, a driving side pulley 12 and a driven side pulley 15 arranged on both sides of this door support rail 2, a power pulley 16, a motor 22 for door driving to give torque to the driving side pulley 12 or the power pulley 16, and a wire rope 19 stretched between the driving side pulley 12, the driven side pulley 15 and the power pulley 16 to move an elevator door 3 with the rotation of these pulleys in accordance with the door support rail 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator drive device for opening and closing a door provided in an elevator car.

[0002]

2. Description of the Related Art FIG. 8 is a front view showing a conventional drive device for an elevator door disclosed in Japanese Utility Model Laid-Open No. 51-92859, in which a door support rail 2 is horizontally provided on a digit 1 above an entrance / exit. Is fixed along. On the other hand, a suspension metal fitting 4 is fixed to the upper part of the elevator door 3, and pulleys 5 are provided on both sides of the metal fitting. When the pulley 5 is placed on the door support rail 2, the pulley 5 rolls to move the door 3 in the opening / closing direction.

Further, sprockets 6a and 6b are provided on both sides of the door support rail 2, and a chain 7 is stretched over the sprockets 6a and 6b. The bracket 8 is fixed to both sides of the bracket 8. And, one of the sprockets 6a, 6b, here the sprocket 6a has a pulley 9 fixed to its shaft,
The door motor 11 is driven via the belt 10. Therefore, when the door motor 11 is driven to rotate normally or reversely, the chain 7 is moved,
The door 3 suspended from the door support rail 2 is opened and closed.

Here, the reason why the chain or the toothed belt is used as the door driving member (power transmission member) is that there is a risk that passengers escape to the outside of the car when the door 3 of the car is pry open while the elevator is traveling. This is for the purpose of preventing the occurrence, and for this reason, the door 3 is urged in the closing direction even when it is fully closed, and in the event that an attempt is made to pry open, the door 3 will be closed with more force. ing. In other words, if a slip occurs between the driving body and the driving strip, the above-mentioned operation will be inconvenient. Therefore, the above-mentioned operation is reliably performed by using the meshing transmission system.

[0005]

Since the conventional elevator door driving apparatus is constructed as described above, a loud noise is generated when the chain or the toothed belt and the sprocket are meshed with each other. It was impossible to open and close and to open and close the door at high speed. Further, there is a problem that fine adjustment of alignment between the sprocket and the chain or the toothed belt for conducting the meshing is required and the cost is increased. Even if the wire rope is used instead of the chain or belt to solve noise and alignment adjustment problems, the wire may stretch and the necessary frictional force with the drive pulley may not be obtained, causing slippage as described above. However, there was a problem that it could not be used.

The present invention has been made in order to solve the above problems, and enables quiet door opening and closing, does not require fine alignment adjustment, and further slips between the driving member and the driving member. The purpose of the present invention is to obtain a drive device for an elevator door that does not generate a noise.

[0007]

An elevator door drive apparatus according to the present invention includes a door support rail on which the elevator door is suspended, a first pulley and a second pulley disposed on both sides of the door support rail. And a door driving motor that applies a rotational force to the first pulley, and the door pulley is moved by the rotation of the first pulley and the second pulley to rotate the elevator door according to the door support rail. And a rope-shaped power transmission body that allows the rope-shaped power transmission body to be wound around the first pulley a plurality of times.

Also, a door support rail on which the elevator door is suspended, a first pulley and a second pulley arranged on both sides of the door support rail, and a third pulley,
A door driving motor that applies a rotational force to the first pulley or the third pulley, the first pulley, and the second pulley.
And a rope-shaped power transmission body which is hung on the third pulley and moves the elevator door according to the door support rail by the rotation of the pulley.

Further, the diameter of the first pulley is different from the diameter of the third pulley, and the rotational force of the door driving motor is transmitted to the third pulley.

An elastic member is provided at the end of the rope-shaped power transmission body.

Further, the rope-shaped power transmission body is a wire rope.

Furthermore, the wire rope winding groove bottom of the first pulley is provided with irregularities that mesh with the strands of the wire rope.

Further, the wire rope winding groove bottom of the third pulley is provided with irregularities for engaging with the strands of the wire rope.

Further, there is provided door lock means for unlocking the elevator car when it is in the landing position and for locking it when it is not in the landing position.

Further, the first pulley and the third pulley are
The mounting plate, which is configured separately from the digit and has higher rigidity than the digit, is rotatably supported.

[0016]

The elevator door driving device according to the present invention opens and closes the elevator door by the frictional force between the rope-shaped power transmission body and the first pulley.

Further, the rope-shaped power transmission body and the first and third
The elevator door is opened and closed by the frictional force with the pulley.

Further, the reduction ratio is obtained between the first pulley and the third pulley.

The elastic member absorbs the elongation of the rope-shaped power transmission body.

Further, the elevator door is opened and closed by the frictional force between the wire rope and the first pulley or the frictional force between the first and third pulleys.

Further, since the unevenness is formed, the frictional force between the first pulley and the wire rope is increased.

Further, since the unevenness is formed, the frictional force between the third pulley and the wire rope is increased.

Further, the door lock means locks the elevator door when it is not in the landing position.

Further, the first pulley and the third pulley are rotatably supported by a mounting plate which is constructed separately from the digit and has higher rigidity than the digit.

[0025]

【Example】

Example 1. Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1 is a schematic configuration diagram of a drive device for an elevator door according to a first embodiment of the present invention. FIG. 2 is a side view of a main part of the drive device for the elevator door according to the first embodiment, and FIG.
FIG. 3 is a diagram showing a relationship between a pulley and a wire rope of a drive device for an elevator door according to the first embodiment. In the figure, 1
Reference numeral 2 denotes a drive pulley that is fixed to the rotary shaft 13 and serves as a first pulley, and a groove 14 for receiving a rope is provided on that phase, as shown in FIG. A driven pulley 15 is a second pulley provided on the other end of the door support rail 2. Reference numeral 16 denotes a power pulley serving as a third pulley fixedly provided to the rotating shaft 17 between the drive pulley 12 and the driven pulley 15, and its diameter is smaller than that of the drive pulley 12. Reference numeral 18 denotes a mounting plate to which rotary shafts 13 and 17 that rotatably support the drive pulley 12 and the power pulley 16 are mounted. The mounting plate 18 has higher rigidity than the digit 1 to which the entire main part of the drive device is mounted.

Reference numeral 19 is a wire rope as a rope-shaped power transmission body, one end of which is directly fixed to a bracket 20 fixed to the door 3 and which is hung between the driving pulley 12 and the power pulley 16 at least once. Driven pulley 15
The other end is supported by the bracket 20 via the pressing spring 21. A motor 22 drives the door 3, and directly drives the drive pulley 12. In addition, the drive side pulley 1 is provided via a gear, a belt (not shown) and the like.
The rotational force may be transmitted to 2.

The frictional force between the driving pulley 12 and the wire rope 19 is obtained by increasing the winding angle between the driving pulley 12 and the wire rope 19 and increasing the tension of the wire rope 19. For this reason, the wire rope 19 is provided with a necessary tension by the pressing spring 21 in order to prevent the tension from decreasing due to the elongation, so that the wire rope 19 is provided between the drive pulley 12 and the power pulley 16 in order to obtain a necessary winding angle. It has been wrapped more than once. Further, as the number of windings is increased, a large load is applied to the driving pulley 12 and the power pulley 16 by the tension of the wire rope 19, so that the mounting plate 18 supporting the shaft 13 and the shaft 17 is attached.
Is configured to obtain the required rigidity. Further, the push spring 21 is inserted on the side where tension is applied when the door is opened so that the push spring 21 does not bend in the door opening direction even if the elevator door 3 is fully opened and the door is pry open.

In the elevator door drive device thus constructed, the necessary frictional force is secured between the wire rope 19 and the drive pulley 12, and the tension of the wire rope 19 is obtained by the pressing spring 21. The opening / closing noise is quiet, no fine alignment adjustment is required, and a safe elevator door drive device without slip is obtained. Also,
Since the mounting plate 18 is provided separately from the digit 1, the load applied to the drive pulley 12 and the power pulley 16 may be supported by the mounting plate 18. Therefore, it is not necessary to increase the rigidity of the entire digit 1. Note that FIG. 3 is a diagram for explaining a state in which the wire rope 19 is wound around the drive-side pulley 12, the driven-side pulley 15, and the power pulley 16, but in the figure, the pitch P of the winding groove is actually illustrated. It is shown larger.

Example 2. Next, the second embodiment of the present invention will be described.
This will be described with reference to FIG. In the apparatus according to the second embodiment, unlike the first embodiment, the motor 23 includes the power pulley 16
It is connected to the. Since the diameter of the power pulley 16 is smaller than the diameter of the drive pulley 12, the required reduction ratio can be obtained with a simple structure. That is,
Assuming that the diameter of the power pulley 16 is d and the diameter of the driving pulley 12 is D, a reduction ratio of D / d can be obtained, so that no separate reducer is provided, and the entire device Can be miniaturized.

Example 3. As a third embodiment, as shown in FIG. 5, the door 2 is provided with a lock mechanism 24 as a door lock means.
May be provided. The lock mechanism 24 mechanically locks the door 2 when it should not be opened, such as during traveling of an elevator, and prevents the passenger from prying open the door 2. Generally, the force of prying open of the door 2 by a passenger or the like is larger than the opening / closing driving force of the door 2, and the wire rope 19, the driving side pulley 12 and the power pulley 1 described above are used.
The frictional force required between 6 and 6 is determined by the prying force. However, since the lock mechanism 24 prevents the door 2 from being pry open, the tension of the wire rope 19, the wire rope 19, the drive side pulley 12, and the power pulley 16
The number of windings with and can be reduced, and the structure can be simplified.

Example 4. In the first to third embodiments described above, the power pulley 16 is provided near the drive pulley 12, but as shown in FIGS. 6 and 7, the drive pulley 12 is provided without the power pulley. By winding the wire rope 19 in multiple layers, that is, by winding it a plurality of times, the frictional force between the drive pulley 12 and the wire rope 19 can be made sufficient.

In the above-described first to fourth embodiments, as shown in FIG. 3, for example, strands of the wire rope 19 (such as ropes) are formed on the surfaces of the grooves of the drive pulley 12 and the power pulley 16 in which the wire rope 19 is hooked. By forming the unevenness 25 according to (twisting), the frictional force between the pulley and the wire rope 19 can be increased.
In this case, the groove portion of the pulley may be formed of plastic, urethane rubber or the like.

Further, in the above-described first to fourth embodiments, the case where the wire rope 19 is used as the rope-shaped power transmission body is shown, but the rope-shaped power transmission body is not limited to the metal wire rope. As long as the required performance such as tensile strength is obtained, a resin-made string-like material may be used.

[0034]

Since the present invention is constructed as described above, it has the following effects.

Since the rope-shaped power transmission body is wound a plurality of times around the first pulley and the elevator door is opened and closed by the frictional force between the rope-shaped power transmission body and the first pulley, slip does not occur. This has the effect of allowing the door to be opened and closed quietly.

Since the elevator door is opened and closed by the frictional force between the rope-shaped power transmission body and the first and third pulleys, it is possible to wind the rope-shaped power transmission body around the first pulley many times. The effect is that the door can be opened and closed quietly without slipping.

The diameter of the first pulley and the diameter of the third pulley are different from each other, and the rotational force of the door driving motor is set to the above third value.
To reduce the speed of the door drive motor without providing a separate speed reducer by providing the speed reduction ratio between the first pulley and the third pulley. And, by extension, has a simple structure and is compact and
It is possible to obtain a space-saving drive device for an elevator door.

By providing an elastic member at the end of the rope-shaped power transmission body so as to absorb the extension of the rope-shaped power transmission body, it is possible to prevent a decrease in tension due to the extension of the rope-shaped power transmission body. It is possible to reduce the need for fine alignment adjustment.

By using the wire rope as the rope-like power transmission body, there is an effect that the door can be opened and closed quietly with sufficient strength and without slipping with the pulley.

By providing unevenness on the bottom of the wire rope winding groove of the first pulley to engage with the strand of the wire rope, it is possible to further reduce the occurrence of slip between the wire rope and the first pulley. Play.

By providing unevenness on the bottom of the wire rope winding groove of the third pulley so as to mesh with the strand of the wire rope, it is possible to further reduce the occurrence of slip between the wire rope and the third pulley. Play.

By providing door lock means that is unlocked when the elevator car is in the landing position and locked when it is not in the landing position, the door lock means prevents prying of the door due to mischief or the like. Contribute to safety. Further, it is possible to reduce the tension of the wire rope and the number of times the rope-shaped power transmission body is wound around the first and third pulleys.

Since the first pulley and the third pulley are formed separately from the digit and are rotatably supported on the mounting plate having higher rigidity than the digit, the first and third pulleys are subjected to a large load.
The risk of damage to the pulley can be reduced. In addition, the main part of the drive unit is installed separately from the large digit, and the rigidity (strength) is increased only in the necessary parts, which is advantageous in terms of economy such as material cost and manufacturing cost. It has the effect.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a drive device for an elevator door according to a first embodiment of the present invention.

FIG. 2 is a side view of the main parts of the drive device for the elevator door according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a relationship between a drive pulley and a wire rope of an elevator door according to the first to third embodiments of the present invention.

FIG. 4 is a schematic configuration diagram of an elevator door driving device according to a second embodiment of the present invention.

FIG. 5 is a schematic configuration diagram of an elevator door driving device according to a third embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of a drive device for an elevator door according to a fourth embodiment of the present invention.

FIG. 7 is a diagram showing a relationship between a pulley and a wire rope of a drive device for an elevator door according to a fourth embodiment of the present invention.

FIG. 8 is a schematic configuration diagram of a conventional drive device for an elevator door.

[Explanation of symbols]

2 door support rails, 3 elevator doors, 12 drive side pulleys, 15 driven side pulleys, 16 power pulleys, 1
9 wire rope, 22 motors.

Claims (9)

[Claims] 1. A door support rail on which an elevator door is suspended, a first pulley and a second pulley arranged on both sides of the door support rail, and a door which applies a rotational force to the first pulley. The first pulley includes: a drive motor; and a rope-shaped power transmission body that is looped over the first pulley and the second pulley to move the elevator door according to the door support rail by rotation of the pulley. A drive device for an elevator door, wherein the rope-shaped power transmission body is wound around a plurality of times. 2. A door support rail on which an elevator door is suspended, a first pulley and a second pulley arranged on both sides of the door support rail, a third pulley, and the first pulley. Alternatively, the door driving motor that applies a rotational force to the third pulley, the first pulley, the second pulley, and the third pulley are wound around the door driving motor, and the elevator door is rotated by the rotation of the pulley. A drive device for an elevator door, comprising: a rope-like power transmission body that moves according to a door support rail. 3. The diameter of the first pulley is different from the diameter of the third pulley, and the rotational force of the door driving motor is transmitted to the third pulley. Drive for elevator doors. 4. The drive device for an elevator door according to claim 1, wherein an elastic member is provided at an end of the rope-shaped power transmission body. 5. The elevator door drive device according to claim 1, wherein the rope-shaped power transmission body is a wire rope. 6. The drive device for an elevator door according to claim 5, wherein the bottom of the wire rope winding groove of the first pulley is provided with irregularities that mesh with the strands of the wire rope. 7. The drive for an elevator door according to claim 5, wherein the bottom of the wire rope winding groove of the third pulley is provided with unevenness for engaging with the strand of the wire rope. apparatus. 8. A door lock means for unlocking the elevator car when the elevator car is in the landing position and locking the elevator car when the elevator car is not in the landing position is provided.
The drive device for the elevator door according to any one of 1. 9. The first pulley and the third pulley are formed separately from the digit, and are rotatably supported by a mounting plate having a rigidity higher than that of the digit. The drive device for the elevator door according to claim 1.