JP2004338850A - Drive unit of elevator door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drive unit of an elevator door for reducing the height dimension of a door unit with a simple structure for compact configuration. <P>SOLUTION: A door rail 9 is mounted to a header case 8 for supporting the upper section of the elevator door 3, the elevator door 3 is suspended by the door rail 9 so that it can travel along the longitudinal direction of the door rail 9, a thin outer rotor type motor 25 and a tension pulley, where a rotor 33 has a pulley section 35, are provided at the gap between the header case 8 and the door rail 9, a timing belt 12 is bridged between the pulley section 35 of the rotor 33 in the motor 25 and the tension pulley, and the timing belt 12 is allowed to orbit by the rotation of the rotor 33 and the elevator door 3 is moved along the door rail 9. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a driving device for driving an elevator door.
[0002]
[Prior art]
FIG. 8 shows a front view of a car 1 of an elevator. An entrance frame 2 is provided on the front of the car 1, and a pair of elevator doors 3 which open and close in the left-right direction are installed on the entrance frame 2. The elevator door 3 opens and closes the entrance 4 on the front of the car 1.
[0003]
The entrance frame 2 is provided with a header case 8 as a door support member at an upper part, a door rail 9 is erected horizontally on the front surface of the header case 8, and is located above the door rail 9; , A timing pulley 10 and a tension pulley 11 are provided.
[0004]
A timing belt 12 is stretched between the timing pulley 10 and the tension pulley 11, and the timing belt 12 circulates in accordance with the rotation of the timing pulley 10 and the tension pulley 11.
[0005]
Each elevator door 3 has a hanger 15 at the upper end, and hanger rollers 16 are rotatably mounted on the left and right back surfaces of these hangers 15, respectively, and these hanger rollers 16 are rollably hung on the door rail 9. Thereby, each elevator door 3 is suspended so as to hang below the door rail 9.
[0006]
A connecting plate 19 is attached to each hanger 15 of each elevator door 3, and a connecting plate 19 of the hanger 15 of one elevator door 3 is connected in the middle of an upper section of the timing belt 12, and a connecting plate 19 of the other elevator door 3 is connected. A connecting plate 19 of the hanger 15 is connected in the middle of the lower section of the timing belt 12, and the elevator belt 3 moves left and right along the door rail 9 by orbiting the timing belt 12 in the forward and reverse directions. The entrance 4 of the car 1 is opened and closed.
[0007]
A motor 21 as a drive source for driving the timing pulley 10 is attached to an upper portion of the header case 8. This motor 21 is an inner rotor type motor, and the timing pulley 10 is attached to its output shaft 21a as shown in FIG.
[0008]
When the timing pulley 10 is driven and rotated by the motor 21, the timing belt 12 moves orbitally, and the elevator door 3 opens and closes by this orbital movement.
[0009]
[Problems to be solved by the invention]
As shown in FIG. 9, the inner rotor type motor 21 has a large depth dimension. Therefore, when installing the motor 21, a relatively large space is required in the front-rear direction. Inevitably, the pulleys 10, 11 and the timing belt 12 have to be disposed above the header case 8 as well.
[0010]
However, if the motor 21, the pulleys 10, 11, and the timing belt 12 are arranged above the header case 8, the door driving mechanism including the motor 21, the pulleys 10, 11, and the timing belt 12, and the door rail 9, a hanger 15 and a door suspension mechanism unit including a hanger roller 16 are vertically spaced apart from each other. As a result, the vertical dimension of the header case 8 must be increased, and the overall height of the door device is reduced. There is a disadvantage that it expands.
[0011]
Further, a configuration is adopted in which the motor 21 is provided on the upper part of the car, a pulley is attached to the output shaft of the motor 21, and the timing pulley 10 is driven by bridging the timing pulley between the pulley and the timing pulley 10. In some cases, however, in this case, not only does the overall height of the door device increase, but also the number of timing belts increases and the structure becomes complicated.
[0012]
The present invention has been made in view of such a point, and an object of the present invention is to provide an elevator door driving device that can be compactly configured with a simple structure while keeping the height of the door device small. To provide.
[0013]
[Means for Solving the Problems]
A door support member for supporting an upper part of an elevator door, a door rail attached to the door support member, an elevator door suspended on the door rail along a longitudinal direction thereof, and a rotor Is a thin motor of an outer rotor type exposed to the outside, the rotor having a pulley portion, a driving source disposed in a gap between the support member and the door rail, A tension pulley that is disposed in the gap between the door rail and the drive source, and is stretched between a rotor field pulley portion of the drive source and the tension pulley, and orbits by the rotation of the rotor; And a timing belt for moving the elevator door along the door rail.
[0014]
A door support member for supporting an upper portion of the elevator door, a door rail attached to the door support member, an elevator door movably suspended on the door rail along a longitudinal direction thereof, A thin motor of an outer rotor type having a rotor exposed to the outside, the rotor having a pulley portion, and a pair of drive sources spaced apart from each other in a gap between the support member and the door rail. And a timing belt that is stretched between pulley portions of a rotor in each of the drive sources, and moves around the rotation of each rotor to move the elevator door along the door rail.
[0015]
The invention according to claim 3 is characterized in that the pulley portion of the drive source is formed of a concave groove formed on the outer peripheral surface of the rotor, and the bottom surface thereof is subjected to uneven processing.
[0016]
The invention according to claim 4 is characterized in that the pulley portion of the drive source is formed by forming a concave groove on an outer peripheral surface of a protrusion protruding from an end surface of the rotor.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS. Parts corresponding to those of the conventional configuration are denoted by the same reference numerals, and redundant description thereof will be omitted.
[0018]
FIGS. 1 to 4 show a first embodiment. In this embodiment, the height of a header case 8 as a door support member is smaller than that of a conventional case. As shown in FIGS. 1 and 2, a motor 25 as a driving source is installed in a space between the door rail 9 and the header case 8.
[0019]
As shown in FIG. 2, the door rail 9 is mounted with a predetermined gap between the door rail 9 and the header case 8 via a plurality of brackets 26 (only one is shown), and the motor 25 is housed in the gap. I have.
[0020]
The motor 25 is an outer rotor type motor. FIG. 3 is an external view of the motor, and FIG. 4 is a sectional view of the motor. The motor 25 includes a motor frame 28 integrally having a hollow support shaft 27, and a stator 30 is attached to an outer periphery of the support shaft 27.
[0021]
A rotary shaft 31 is inserted into the support shaft 27, and the rotary shaft 31 is rotatably supported via a bearing 32. One end of the rotary shaft 31 projects from one end of the support shaft 27, and the projecting end The rotor 33 is attached to the.
[0022]
The rotor 33 has a cap shape, and a magnet 34 facing the stator 30 is attached to an inner peripheral surface of the rotor 33 so that the rotor 33 rotates integrally with the rotating shaft 31 in response to energization of the coil 30 a of the stator 30. Has become.
[0023]
A pulley portion 35 formed of a concave groove is formed on the outer peripheral surface of the rotor 33. The bottom surface of the pulley portion 35 is subjected to a saw-toothed unevenness processing 36, and the wall surfaces on both sides of the pulley portion 35 are formed as flange portions 37 inclined in a tapered shape.
[0024]
The outer rotor type motor 25 has a structure in which the rotor 33 has the pulley portion 35. Therefore, the rotating shaft 31 is protruded on the rear side of the motor frame 28, that is, on the side opposite to the rotor 33, and the protruding end thereof is formed. It has a thin structure with a small axial length compared to a structure in which a timing pulley is attached to the section.
[0025]
And since the motor 25 of this embodiment is configured to be thin, it is possible to store and install the motor 25 in the space between the door rail 9 and the header case 8.
[0026]
The motor 25 is fixed to the left and right ends of the header case 8 by fastening the motor frame 28 to the front surface of the header case 8 with fasteners 29 such as bolts as shown in FIG.
[0027]
A tension pulley 11 is rotatably attached to the left and right ends of the left and right ends of the header case 8 so as to be disposed in a gap between the header case 8 and the door rail 9. The timing belt 12 is stretched between the motor 25 and the pulley 35 of the rotor 33.
[0028]
The hanger 15 of one elevator door 3 is connected to the middle of the upper side section of the timing belt 12 via the connecting plate 39a, and the hanger 15 of the other elevator door 3 is connected to the lower part of the timing belt 12 via the connecting plate 39b. Each elevator door 3 is moved right and left along the door rail 9 when the rotor 33 is rotated by the activation of the motor 25 and the timing belt 12 circulates. The entrance 4 is opened and closed.
[0029]
In such a configuration, the door drive mechanism section including the motor 25, the tension pulley 11, and the timing belt 12 is disposed inside the door suspension mechanism section including the door rail 9, the hanger 15, and the hanger roller 16, and overlaps with each other. Therefore, the vertical dimension of the header case 8 can be suppressed to be small, whereby the overall height of the door device can be suppressed and the door device can be made compact.
[0030]
The bottom surface of the pulley portion 35 formed on the rotor 33 of the motor 25 is provided with a concave / convex processing 36, so that the frictional force with the timing belt 12 is increased when the rotor 33 rotates, so that the timing belt 12 can be circulated accurately. The timing belt 12 can be moved, and the timing belt 12 can be prevented from being accidentally dropped off since the wall surfaces on both sides of the pulley portion 35 are tapered flange portions 37.
[0031]
FIG. 5 shows a second embodiment. In this embodiment, the same outer rotor type motor as the motor 25 in the first embodiment is used instead of the tension pulley 11 in the first embodiment. 25 is installed in the gap inside the door rail 9.
[0032]
That is, a pair of motors 25 are provided in the gap inside the door rail 9 so as to be separated from each other on the left and right sides of the header case 8. The timing belt 12 that links the elevator doors 3 is stretched between the pulleys of the rotor 33 of the motor 25.
[0033]
Also in the case of this embodiment, the door drive mechanism section including the pair of motors 25 and the timing belt 12 is disposed inside the door suspension mechanism section including the door rail 9, the hanger 15, and the hanger roller 16 so that the door drive mechanism section overlaps front and rear. Therefore, the vertical dimension of the header case 8 can be reduced, and the overall height of the door device can be reduced to achieve a compact configuration.
[0034]
When the elevator door 3 is opened and closed, the two motors 25 are simultaneously activated, and the timing belt 12 is driven by the rotational force of the rotor 33 of the two motors 25 to make orbital movement. The orbital movement causes the elevator door 3 to open and close. I do.
[0035]
Therefore, the driving force for the elevator door 3 is increased, and even if the elevator door 3 has a high load, the door 3 can be smoothly and accurately opened and closed without using a booster such as a complicated reduction mechanism.
[0036]
FIG. 6 shows a modified example of the motor 25. In the motor 25 in this case, a cylindrical projection 33a is integrally formed on an end surface of the rotor 33, and an outer peripheral surface of the projection 33a A pulley portion 35 formed of a concave groove is formed, and a saw-toothed unevenness processing 36 is applied to the bottom surface of the pulley portion 35.
[0037]
In the motor 25 in this case, a small-diameter pulley portion 35 can be configured. Since the pulley portion 35 is disposed on the end surface of the rotor 33, the thickness of the peripheral surface of the rotor 33 can be kept uniform, and the position of the magnet attached to the inner peripheral surface can be freely selected.
[0038]
FIG. 7 shows a further modified example of the motor 25. In this case, in the motor 25, an annular pulley member 40 separate from the rotor 33 is fitted and fixed to the outer periphery of the rotor 33. The outer peripheral surface of the pulley member 40 is a concave groove-shaped pulley portion 35, and the bottom surface of the pulley portion 35 is subjected to unevenness processing 36.
[0039]
In the motor 25 in this case, there is no need to form a concave groove-shaped pulley portion on the rotor 33 itself or to perform unevenness processing on the bottom surface thereof. Therefore, the motor 25 having the pulley function can be easily manufactured.
[0040]
In each of the above-described embodiments, the pair of doors move to the left and right to open and close, and the door is a double-opening door device. However, the present invention can be applied to a single-opening door device. is there.
[0041]
【The invention's effect】
As described above, according to the present invention, it is possible to reduce the height of the door device with a simple structure and make it compact.
[Brief description of the drawings]
FIG. 1 is a front view of an elevator door driving device according to a first embodiment of the present invention.
FIG. 2 is an enlarged sectional view showing a main part of the driving device.
FIG. 3 is an external perspective view showing a motor in the driving device.
FIG. 4 is a sectional view of a motor provided in the driving device.
FIG. 5 is a front view of an elevator door driving device according to a second embodiment of the present invention.
FIG. 6 is an external perspective view showing a modification of the motor of the driving device.
FIG. 7 is an external perspective view showing still another modified example of the motor of the driving device.
FIG. 8 is a front view showing a conventional elevator door driving device.
FIG. 9 is a perspective view showing the appearance of a motor of the conventional driving device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Car, 2 ... Doorway frame, 3 ... Elevator door, 4 ... Doorway, 8 ... Header case, 9 ... Door rail, 11 ... Tension pulley, 12 ... Timing belt, 14 ... Header, 15 ... Hanger, 16 ... Hanger roller , 25 ... motor, 30 ... stator, 33 ... rotor, 35 ... pulley part, 36 ... concave and convex processing, 37 ... flange part.

Claims (4)

A door support member for supporting an upper portion of the elevator door,
A door rail attached to the door support member,
An elevator door suspended on the door rail along its longitudinal direction,
An outer rotor type thin motor in which a rotor is exposed to the outside, the rotor having a pulley portion, a drive source disposed in a gap between the support member and the door rail,
A tension pulley disposed separately from the drive source in a gap between the support member and the door rail;
A timing belt that is stretched between the pulley portion of the rotor and the tension pulley in the drive source, and moves around by the rotation of the rotor to move the elevator door along the door rail;
A drive device for an elevator door, comprising: A door support member for supporting an upper portion of the elevator door,
A door rail attached to the door support member,
An elevator door suspended on the door rail along its longitudinal direction,
An outer rotor type thin motor in which each rotor is exposed to the outside, the rotor having a pulley portion, and a pair of drives arranged apart from each other in a gap between the support member and the door rail. Source
A timing belt that is stretched between the pulley portions of the rotors in the respective drive sources, moves around by the rotation of the respective rotors, and moves the elevator doors along the door rails,
A drive device for an elevator door, comprising: The elevator door driving device according to claim 1, wherein the pulley portion of the driving source is formed of a concave groove formed on an outer peripheral surface of the rotor, and the bottom surface of the pulley portion is subjected to uneven processing. . The pulley portion of the drive source is formed by projecting a protrusion on an end face of the rotor and forming a concave groove on an outer peripheral surface of the protrusion. Elevator door drive.

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