JP6729909B2 - Elevator door opener - Google Patents

Description

The present invention relates to a door opening/closing device for an elevator, and more particularly to a door opening/closing device having a function of reversing or stopping the sliding movement of the door when the sliding movement of the door is obstructed.

In Patent Document 1, in a door opening and closing device for an elevator, when a person or an object is caught in the door and the sliding movement of the door is obstructed, this is detected to reverse or stop the sliding movement of the door. It is described that they are allowed to do so.

JP, 2009-234708, A

In the above-mentioned conventional door opening/closing device, a large impact sound is generated when the sliding movement of the door is detected to be reversed and the sliding movement of the door is reversed.

The present invention provides a door opening/closing device for an elevator, which can reverse the sliding movement of the door when the sliding movement of the door is obstructed, and can suppress the generation of a large impact sound at this time. With the goal.

An elevator door opening/closing device according to an aspect of the present invention includes an endless belt, a drive pulley, a motor unit, a base portion, a restricting structure, a return spring, a detector, a door control portion, and a damping mechanism. To have.

The endless belt is connected to an elevator door. The endless belt is hung on the drive pulley.

The motor unit rotationally drives the drive pulley. The motor unit is rotatably connected to the base portion.

The regulation structure regulates rotation of the motor unit with respect to the base portion within a predetermined range.

The return spring is interposed between the motor unit and the base portion and applies an urging force for rotating the motor unit in the first direction within the predetermined range.

The detector detects that the motor unit has rotated with respect to the base portion in a second direction opposite to the first direction.

The door control unit reverses or stops the rotational drive of the motor unit when the detector detects that the motor unit has rotated in the second direction.

The damping mechanism is interposed between the motor unit and the base portion to damp the rotation speed of the motor unit in the first direction.

The elevator door opening/closing device of the present invention is capable of reversing the sliding movement of the door when the sliding movement of the door is obstructed, and suppressing the generation of a large impact sound at this time. Play.

FIG. 1 is a perspective view showing an elevator door opening/closing device according to an embodiment. FIG. 2 is a perspective view showing a main part of the above door opening/closing device. FIG. 3 is a top view showing the main part of the above. FIG. 4 is a bottom view showing the main part of the above. FIG. 5: is a perspective view which shows the state which the motor unit rotated in the main part same as the above. FIG. 6 is a top view showing a state where the motor unit is rotated in the main part of the above. FIG. 7 is a bottom view showing a state in which the motor unit is rotated in the main part of the above. FIG. 8: is a block diagram which shows the relationship of the control part, detector, and motor with which the door opening/closing apparatus same as the above is equipped. FIG. 9 is a schematic view of an elevator cage in which the above door opening/closing device is installed.

FIG. 1 shows an elevator door opening/closing device according to an embodiment. Hereinafter, the door opening/closing device of the elevator is simply referred to as “door opening/closing device”.

As shown by the broken line in FIG. 9, the door opening/closing device of one embodiment is housed in the upper frame 14 of the entrance/exit 12 of the elevator cage 1 and slides the plurality of doors 10 for opening/closing the entrance/exit 12 left and right. It is configured.

As shown in FIG. 1, a door opening/closing device according to an exemplary embodiment drives a guide rail 26, a slide portion 27 which is guided by the guide rail 26 and can slide left and right, and reciprocally drives the slide portion 27 to the left and right. And a drive device 28. The guide rail 26 is immovably fixed to the upper frame 14 (see FIG. 9) of the elevator basket 1.

The slide portion 27 is connected to the plurality of doors 10 via an interlocking mechanism 29 installed below the guide rail 26. Each door 10 is opened/closed in conjunction with the sliding movement of the slide portion 27.

The drive device 28 includes an endless belt 21, a drive pulley 22, a driven pulley 23, and a motor unit 24. The endless belt 21 is a belt spanning a drive pulley 22 and a driven pulley 23, and a slide portion 27 is connected to a part of the circumferential direction of the endless belt 21.

The drive pulley 22 and the driven pulley 23 are supported by the guide rail 26 with a distance left and right.

The drive pulley 22 is connected to a motor unit 24 installed above the drive pulley 22 and is rotationally driven by the motor unit 24.

The motor unit 24 integrally includes a motor 241 that is a power source and a speed reducer 243 that reduces the rotational force of the motor 241 and transmits the reduced rotational force to the drive pulley 22.

The motor unit 24 is installed on the guide rail 26 via the base portion 4.

The base portion 4 is installed immovably with respect to the guide rail 26. The motor unit 24 is installed on the base portion 4 so as to be rotatable within a predetermined range.

The rotation of the motor unit 24 with respect to the base portion 4 is restricted by the restriction structure 5 shown in FIGS. 3 and 6.

The restricting structure 5 includes a first restricting portion 51 that laterally projects from the speed reducer 243 that constitutes the lower portion of the motor unit 24, and a second restricting portion 52 that also laterally projects from the speed reducer 243.

The first restricting portion 51 and the second restricting portion 52 are positioned with a distance around the rotation center of the motor unit 24. The base portion 4 is provided with a protruding structure 45 protruding upward, and the protruding structure 45 is located between the first restricting portion 51 and the second restricting portion 52.

The rotation of the motor unit 24 in the first direction D1 is restricted by the first restricting portion 51 hitting the protruding structure 45 (see FIG. 3 ). The rotation of the motor unit 24 in the second direction D2 is restricted by the second restricting portion 52 hitting the protruding structure 45 (see FIG. 6 ). The first direction D1 and the second direction D2 are opposite directions. As a result, the rotation of the motor unit 24 with respect to the base portion 4 is restricted within a predetermined range of about 10°.

Furthermore, the door opening/closing device of one embodiment controls the return spring 6 for urging the motor unit 24, the detector 7 (see FIGS. 4 and 7) for detecting the rotation of the motor unit 24, and the elevator cage 1. The control unit 8 (see FIG. 8) and the damping mechanism 9 are provided.

The return spring 6 is in a compressed state between the spring receiving portion 47 protruding laterally from the base portion 4 and the spring receiving portion 247 protruding laterally from the lower end portion of the motor unit 24 (speed reducer 243). Will be placed in. Both spring receiving portions 47 and 247 are positioned so as to face each other in the horizontal direction, and are configured to receive the biasing force of the return spring 6 in the directions away from each other.

As shown in FIGS. 4 and 7, the detector 7 includes a detector main body 71 installed on the lower surface of the base portion 4, a lever 72 extending from the detector main body 71, and a roller supported by the tip of the lever 72. And 73.

A long hole 41 is formed through the base portion 4. A rod-shaped protruding portion 245 protruding downward from the motor unit 24 (speed reducer 243) is inserted into the long hole 41. With the rotation of the motor unit 24, the projecting portion 245 is movable in the elongated hole 41. In the state shown in FIG. 4 (the state in which the sliding movement of the door 10 is not hindered), at least a part of the roller 73 is positioned to overlap the elongated hole 41 in a bottom view.

The control unit 8 includes a door control unit 81 configured to control opening/closing of the door 10, as shown in FIG. 8. The door control unit 81 is electrically connected to the motor 241 and the detector 7.

The door control unit 81 closes the door 10 by rotating the motor 241 in one direction. When the motor 241 is rotating, the door controller 81 slides the door 10 based on the detection result of the detector 7. When it is detected that the movement is hindered, the motor 241 is rotated in the reverse direction. As a result, the door 10 is opened to enhance safety.

As shown in FIG. 2 and the like, the damping mechanism 9 includes a rotary damper 91 and an arm mechanism 92.

The rotary damper 91 includes a rotating shaft 913 and a damping unit 915 configured to damp the rotation speed of the rotating shaft 913. The damping part 915 is immovably attached to the base part 4.

The arm mechanism 92 is a mechanism that connects the motor unit 24 and the rotary damper 91. The arm mechanism 92 includes a long plate-shaped first arm 921 and a second arm 922 that is shorter than the first arm 921. The first arm 921 is not in a straight line shape in a plan view, but in a direction away from the motor unit 24. It has a shape in which a part in the longitudinal direction is bent so as to slightly project. One end of the first arm 921 is rotatably connected to the shaft 249 provided at the lower end of the motor unit 24 with one degree of freedom. The shaft portion 249 is located so as to project upward from the spring receiving portion 247. The other end of the first arm 921 is rotatably connected to one end of the second arm 922 with one degree of freedom. The other end of the second arm 922 is connected to the rotary shaft 913 of the rotary damper 91. The second arm 922 and the rotation shaft 913 are connected so as to rotate integrally.

Next, in the door opening/closing apparatus of one embodiment, the operation of each mechanism when the door 10 is closed and the sliding movement of the door 10 is impeded by a person or an object being caught will be described.

When the door control unit 81 rotationally drives the motor 241 in one direction, the drive pulley 22 is rotationally driven in one direction through the speed reducer 243, and the door 10 is closed through the endless belt 21, the slide unit 27, and the interlocking mechanism 29. I do.

At this time, a reaction force at the time of rotating the drive pulley 22 acts on the motor unit 24, but since the return spring 6 gives an urging force against the reaction force, the motor unit 24 is moved relative to the base portion 4. The position shown in FIGS. 2 to 4 is held.

The direction in which the return spring 6 applies the urging force to the motor unit 24 is the first direction D1 indicated by the arrow in the drawing. The motor unit 24 to which the biasing force of the return spring 6 applies the biasing force in the first direction D1 is held at the position where the first restricting portion 51 is pressed against the protrusion structure 45, as shown in FIG.

Here, if the closing operation of the door 10 is hindered in the middle, the rotational drive of the drive pulley 22 is locked, so that the motor unit 24 becomes larger in the second direction D2 opposite to the first direction D1. Reaction force works. When the reaction force exceeds the biasing force of the return spring 6, the motor unit 24 rotates in the second direction D2 within a predetermined range with respect to the base portion 4 (see FIGS. 5 to 7).

When the motor unit 24 rotates to a certain extent with respect to the base portion 4, the detector 7 detects this by the protrusion 245 hitting the roller 73 and the lever 72 being pushed in (see FIG. 7), and the detection result is detected by the door. Output to the control unit 81. The door control unit 81 receives the output from the detector 7 and reverses the rotational drive of the motor 241.

At this time, the motor unit 24 tries to rotate vigorously in the first direction D1, but the rotation speed of the motor unit 24 in the first direction D1 is damped by the damping mechanism 9. Therefore, the impact when the first restricting portion 51 hits the protruding structure 45 is suppressed, and the generation of a large impact sound that makes the user feel uncomfortable is suppressed.

In the door opening/closing device of one embodiment, the damping part 915 provided in the rotary damper 91 is a one-way type damping part configured to damp only the rotation speed of the motor unit 24 in the first direction D1 . Therefore, the rotation of the motor unit 24 in the second direction D2 is quickly performed.

Further, in the door opening/closing device of one embodiment, the door control unit 81 is configured to reverse the rotational drive of the motor 241 in response to the output result from the detector 7, but stops the rotational drive of the motor 241. It can also be configured to.

As described above in detail with reference to the accompanying drawings, the door opening/closing device according to the embodiment includes the endless belt 21, the drive pulley 22, the motor unit 24, the base portion 4, the return spring 6, the detector 7, the door control portion 81. And a damping mechanism 9.

The endless belt 21 is connected to the door 10 of the elevator.

The endless belt 21 is hung on the drive pulley 22.

The motor unit 24 rotationally drives the drive pulley 22.

A motor unit 24 is rotatably connected to the base portion 4 within a predetermined range.

The return spring 6 is interposed between the motor unit 24 and the base portion 4, and gives the motor unit 24 an urging force for rotating the motor unit 24 in the first direction D1 within the predetermined range.

The detector 7 detects that the motor unit 24 has rotated with respect to the base portion 4 in a second direction D2 opposite to the first direction D1.

The door control unit 81 reverses or stops the rotational drive of the motor unit 24 (that is, the motor 241) when the detector 7 detects that the motor unit 24 has rotated in the second direction D2.

The damping mechanism 9 is interposed between the motor unit 24 and the base portion 4 to damp the rotation speed of the motor unit 24 in the first direction D1.

Therefore, according to the door opening/closing device of one embodiment, when the sliding movement of the door 10 is hindered, the motor unit 24 rotates with respect to the base portion 4, and when the detector 7 detects this, the door control portion 81. Can reverse or stop the motor unit 24 for safety. Moreover, since the damping mechanism 9 is interposed between the motor unit 24 and the base portion 4, it is possible to suppress a large impact sound at this time.

Further, in the door opening/closing device according to the embodiment, the damping mechanism 9 includes a rotary damper 91 mounted on the base portion 4 and an arm mechanism 92 interposed between the rotary damper 91 and the motor unit 24.

The rotary damper 91 has a rotating shaft 913 connected to the arm mechanism 92, and a damping unit 915 attached to the base unit 4 and configured to damp the rotation speed of the rotating shaft 913.

Therefore, according to the door opening/closing device of one embodiment, the rotation speed of the motor unit 24 with respect to the base portion 4 can be efficiently reduced in a space-saving manner.

Although the embodiment has been described above, the door opening/closing device of the elevator is not limited to the one described in the embodiment, and it is possible to apply appropriate design changes and appropriately combine known techniques.

4 Base part 5 Regulation structure 6 Return spring 7 Detector 9 Damping mechanism 10 Door 21 Endless belt 22 Drive pulley 24 Motor unit 81 Door control part 91 Rotary damper 92 Arm mechanism 913 Rotating shaft 915 Damping part D1 First direction D2 Second direction

Claims (1)

An endless belt connected to the elevator door,
A drive pulley on which the endless belt is hung,
A motor unit that rotationally drives the drive pulley,
A base portion to which the motor unit is rotatably connected,
A restriction structure for restricting rotation of the motor unit with respect to the base portion within a predetermined range;
A return spring that is interposed between the motor unit and the base portion and that applies a biasing force to the motor unit to rotate in the first direction within the predetermined range;
With respect to the base portion, a detector that detects that the motor unit has rotated in a second direction opposite to the first direction,
A door control unit that reverses or stops the rotational drive of the motor unit when it is detected by the detector that the motor unit has rotated in the second direction;
A damping mechanism interposed between the motor unit and the base portion for damping the rotational speed of the motor unit in the first direction ,
The damping mechanism is
A rotary damper attached to the base portion,
An arm mechanism interposed between the rotary damper and the motor unit,
The rotary damper is a rotary shaft connected to the arm mechanism,
A damping unit attached to the base unit and configured to damp the rotational speed of the rotating shaft,
The door opening/closing device for an elevator, wherein the attenuating portion is a one-way type attenuating portion configured to attenuate only the rotation speed of the motor unit in the first direction .

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