JP3740568B2 - Sliding door device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sliding door device, and more particularly, to a sliding door that can be closed and operated even during a power failure while being a sliding door that is electrically opened.
[0002]
[Prior art]
The conventional electric opening / closing type sliding door cannot be used as a smoke barrier because the door is opened when the power is turned off when the door is open. Therefore, when the sliding door is used as a smoke barrier, it is necessary to use a manual sliding door or an electric sliding door with a separate battery. Since indoor sliding doors are mainly used in hospitals, nursing homes, etc., electric doors are required. However, electric doors require a battery, which greatly increases costs.
[0003]
In addition, in such a sliding door, it may be possible to close the door body by the spring force of the self-closing device even when the power is turned off. However, if the photoelectric switch for starting and reversing opening is kept blocked, the door can be fully opened. Since the door body cannot be held at the position, there is a problem that the door body repeats opening and closing operations near the fully open position. That is, when the door is closed while the photoelectric switch is in operation, the door is opened when the proximity switch is restored. As soon as the door opens, the proximity switch works and the door stops and closes again. This operation is repeated while the photoelectric switch is working.
[0004]
[Problems to be solved by the invention]
The present invention was devised to solve the above-described problems, and has a simple structure for opening the sliding doors electrically and closing them with a self-closing device. However, it aims at providing the sliding door apparatus which can close a door body satisfactorily. Another object of the present invention is to maintain the fully open position of the door for a predetermined time.
[0005]
[Means for Solving the Problems]
The technical means adopted by the present invention in order to achieve such a problem is a sliding door device in which the door body is opened by an electric drive mechanism, and the door body is closed by a self-closing mechanism. The electric motor has a housing of the electric motor and a motor shaft housed in the housing, and the speed reducer has a housing of the speed reducer and a speed reduction shaft housed in the housing. The output side end of the motor shaft and the reduction shaft of the speed reducer are interlocked and connected via a speed reduction gear mechanism, and an oil seal is attached to the joint between the output shaft of the speed reduction shaft and the housing of the speed reducer. Providing an air gap without providing an oil seal at the outer peripheral surface of the output side shaft portion of the motor shaft and the joint portion of the housing of the electric motor, so that the motor shaft is a motor shaft without an oil seal; During closing of the door body, it is characterized in that the free-closing mechanism is configured to forcibly rotate the motor shaft of the electric motor. When the door body is opened by an electric motor and the door body door body is closed by a spring force, it is necessary to forcibly rotate the opening and closing machine by the spring force of the self-closing device. However, the electric motor and speed reducer constituting the switch have so-called increased starting torque due to inertia and friction of these components, and such increased starting torque is larger than the spring force of the self-closing device. The door cannot be closed. On the other hand, it is conceivable that the rotating pulley is idled so as not to transmit the rotation to the opening / closing device at the time of closing, but there are problems such as an increase in manufacturing cost. The present invention solves this.
[0008]
Preferably, the grease on the rotating shaft of the electric motor is composed of grease with high viscosity, and more preferably, the grease is grease containing copper powder.
[0009]
Preferably, the door body is configured to hold the fully open position for a predetermined time by the electromagnet at the fully open stop position of the door body. Or you may comprise so that a fully open position may be hold | maintained for a predetermined time with a timer, without using an electromagnet.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic front view of the sliding door device. In the opening frame composed of the door end side vertical frame 1, the door bottom side vertical frame 2, and the upper frame 3, a hanger rail (not shown) extending horizontally in the left-right direction is disposed in the upper frame 3. The door body 5 is suspended so as to be movable in the left-right direction. Reference numeral 4 denotes a changeover switch for switching between electric and manual operation.
[0011]
Two brackets 6 and 7 are provided at an upper end portion of the door body 5 that opens and closes the opening with a space in the left-right direction. Hanger rollers 8 and 9 are mounted on the brackets 6 and 7, respectively, and the hanger rollers 8 and 9 are guided by the hanger rail 4 and can freely roll in the left-right direction. The sliding door device is configured to open and close the opening when the door body 5 suspended via the hanger rollers 8 and 9 moves in the left-right direction.
[0012]
A self-closing device 10 is disposed inside the upper portion of the door-end side vertical frame 1, and an electric drive device 11 is disposed inside the upper portion of the door-end side vertical frame 2. An endless belt 12 composed of a timing belt is wound around the self-closing device 10 and the electric drive device 11, and the end portions 12 a and 12 b of the endless belt 12 are fixed to the brackets 6 and 7, respectively. . Specifically, in the two brackets 6 and 7, the end 12a of the end belt 12 is connected to the bracket 6 on the door end side, and the end belt 12 extends to the door end side, and the self-closing device. 10 is wound around the self-closing pulley 130, extends toward the door butt side, is wound around the driving pulley of the electric drive device 11, extends toward the door tip side, and its extended end 12b is on the door butt side. It is connected to the bracket 7.
[0013]
As shown in FIG. 2, the self-closing device 10 has a hollow rotary drum 13 rotatably mounted on a bracket 15 via a support shaft 14, and rotates a mainspring spring 16 that holds a predetermined energy storage force in advance. The drum 13 is configured to be installed inside. The endless belt 12 is wound around the outer periphery of the rotary drum 13 constituting the self-closing pulley 130, and the rotary drum 13 is driven to rotate in the direction of the dotted arrow by the stored force of the mainspring spring 16. Note that the self-closing device is not limited to one constituted by a spring, and may be constituted by a known means such as an inclined rail or a pneumatic cylinder.
[0014]
Driving on the open side of the door body 5 is performed by an electric drive mechanism. The electric drive mechanism includes an opening / closing device composed of an electric motor 17 and a speed reducer 18. The electric motor 17 includes a housing 19 and a motor shaft 20 housed in the housing 19. The motor shaft 20 is rotatably supported by bearings 21 at both ends, and an output side end portion of the motor shaft 20. Is provided with a hypoid gear 22. An oil seal is not provided at the joint between the outer peripheral surface of the output side shaft portion of the motor shaft 20 and the inner wall surface of the opening of the housing 19, and a gap S is formed. The lubricating oil for rotation of the motor shaft 20 is composed of grease mixed with copper powder.
[0015]
The speed reducer 18 includes a housing 19a and a speed reducing shaft 23 built in the housing 19a. The speed reducing shaft 23 is rotatably supported by a bearing 24. A hypoid gear 25 is provided on the speed reducing shaft 23. The hypoid gear 25 meshes with a hypoid gear 22 provided at the end of the motor shaft 20. The other end of the speed reduction shaft 23 protrudes from the housing 19a, and the protrusion constitutes an output shaft 26 of the switch. That is, the motor shaft 20 is linked to the reduction shaft 23 via a reduction gear mechanism, and the rotational force of the reduced motor is taken out via the output shaft 26. An oil seal 27 is provided in the connection between the output shaft 26 and the housing 19.
[0016]
A rotary pulley 28 is provided on the output shaft 26, and the end belt 12 is wound around the rotary pulley 28. The output shaft 26 is rotated by driving the electric motor, and the rotational force of the output shaft 26 is transmitted to the rotary pulley 28 via the speed reducer 18. When the door body 5 moves in the closing direction, the motor shaft 20 is rotated together by rotating the rotary pulley 28 in the reverse direction. However, since the oil seal is not provided on the motor shaft 20, the oil seal is The resulting braking force does not load the rotation of the motor shaft 20. In particular, when the motor shaft 20 is rotated from the speed reduction shaft 23, the speed increases, so that the influence of component resistance in the motor is considered to be large.
[0017]
In FIG. 1, the bracket 6 is provided with a magnet 29 constituting limit means, and a proximity switch 30 constituting limit means is provided at a predetermined position of the upper frame 3 so that the door body 5 is opened. When the magnet 29 provided on the door body side overlaps the proximity switch 30, the limit means is activated and the electric motor 17 is stopped. The magnet 29 and the proximity switch 30 are attached at positions where the limit means operates a predetermined distance before the door body 5 is fully opened.
[0018]
The bracket 7 is provided with an electromagnet bracket 31 constituting a fully open position holding means. An electromagnet 32 is provided in the upper frame 3 corresponding to the position of the electromagnet bracket 31 in the fully open position of the door body 5.
[0019]
FIG. 4 shows the control of the electric opening mechanism. When activation is performed by the photoelectric switch 33, the electric motor 17 is activated and the door body 5 is driven to open. When the limit means operates and the electric motor 17 stops, the rotation of the output shaft 26 stops. The electromagnet 32 is excited at the fully open position, and the electromagnet bracket 31 is magnetically attached to the electromagnet 32 by the magnetic force, so that the fully open position of the door body 5 is maintained. When the electric motor is stopped or the activation is turned off and the timer is up, the power supply to the electromagnet 32 is cut off, and the door 5 is moved in the closing direction by the self-closing device 10. Such a control mechanism is incorporated in the control panel 34.
[0020]
Therefore, according to the present invention, even when the electric motor 17 is stopped, the door body 5 can be closed by the spring force of the self-closing device 10, and therefore the self-closing device 10 even if the door body 5 is opened during a power failure. Since the door body 5 is closed by the spring force, the electric sliding door can be used as a smoke barrier. If the photoelectric switch 33 is blocked while the door 5 is closed when the power is on, the door 5 is opened by the electric motor 17 and stopped by the proximity switch 30 and then again the spring of the self-closing device 10. Since it is closed by force, safety during normal use can be secured. Since the door body 5 is held for a predetermined time by the electromagnet 32 in the fully opened position, the door body 5 does not repeat the opening and closing operation in the fully opened position even if the photoelectric switch 33 remains on during normal operation (while energizing). The door 5 can be stopped at the fully open position.
【The invention's effect】
According to the present invention, even if the electric motor is stopped, the door body can be closed with the force of the self-closing device, so even if the door body opens during a power failure, the door body is closed by the self-closing device. Electric sliding doors can be used as smoke barriers. In addition, when the power is on, safety during normal use can be secured. In addition, when the electromagnet keeps the fully open position of the door body, even if the photoelectric switch remains on during normal operation (energization), the door body does not repeat at the fully open position and stops at the fully open position. Can be made. In particular, during normal operation, by adjusting the fully open stop time with a timer, it is possible to respond advantageously when a wheelchair or the like passes.
[Brief description of the drawings]
FIG. 1 is an overall schematic view of a sliding door device.
FIG. 2 is a diagram showing a self-closing device.
FIG. 3 is a diagram showing the inside of the switch.
FIG. 4 is a diagram illustrating control of an electric opening mechanism.
[Explanation of symbols]
5 Door body 10 Self-closing device 11 Electric drive device 17 Electric motor 18 Reducer
S gap

Claims (2)

In the sliding door device that performs the opening operation of the door body with an electric drive mechanism and performs the closing operation of the door body with a self-closing mechanism,
The electric drive mechanism includes an electric motor and a speed reducer. The electric motor includes a housing of the electric motor and a motor shaft built in the housing. The speed reducer includes a housing of the speed reducer and a housing. And the output side end of the motor shaft and the reduction shaft of the speed reducer are interlocked and connected via a speed reduction gear mechanism.
An oil seal is provided at a joint portion between the output shaft of the reduction shaft and the housing of the reduction device,
By forming a gap without providing an oil seal in the outer peripheral surface of the output shaft portion of the motor shaft and the joint portion of the housing of the electric motor, the motor shaft is a motor shaft without an oil seal,
The sliding door device , wherein the self-closing mechanism is configured to forcibly rotate the motor shaft of the electric motor when the door body is closed . The sliding door device according to claim 1, wherein the fully open position is held by an electromagnet for a predetermined time at the fully open stop position of the door body.

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