JPH0736051Y2 - Automatic door opening / closing control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a vehicle door automatic opening / closing control device for automatically opening / closing a door in a vehicle such as a one-man bus or other buses.

(Prior Art) Conventionally, this type of device controls the rotation of an electric motor according to the operation of an operation switch provided near the driver's seat, and drives the door opening / closing mechanism by using the rotational force of the motor. In addition to enabling automatic opening and closing of the door, an interrupting mechanism is provided between the electric motor and the door opening and closing mechanism, and the interrupting mechanism is switched to the disconnected state in response to the operation of the operation lever, so that the door can be manually operated in an emergency. It can also be opened and closed.

(Problems to be solved by the invention) However, in the above-mentioned conventional device, since the operation lever is provided on the lower side of the floor or the like at a position where it is difficult to operate, it is possible to prevent the door from automatically opening and closing in an emergency. There is a problem that it is not possible to quickly switch to the manual open / closed state, and it is not possible to easily return from the manual open / closed state to the automatic open / closed state.

The present invention has been devised in view of the above problems, and an object thereof is a vehicle door that enables automatic opening and closing of the door without requiring switching of the interrupting mechanism by the operation lever as described above. To provide an automatic opening / closing control device.

(Means for Solving the Problems) In order to achieve the above-mentioned object, a structural feature of the present invention is that an opening / closing mechanism (15-18) for opening and closing a vehicle door (12) and an electric motor for driving the opening / closing mechanism ( 22) and an operation switch (47) for instructing automatic opening and closing of the door, in an automatic opening and closing control device for a vehicle door, which is provided between the output shaft of the electric motor and the opening and closing mechanism and electrically controlled. The clutch means (25) for connecting and disconnecting the power transmission between the output shaft and the opening / closing mechanism and the clutch means for immediately setting and controlling the clutch means to be in the connected state when the automatic switch is instructed by the operation switch and not instructing the automatic opening / closing by the operation switch. Sometimes clutch control means (TR5, TR6, 46a, 46) for controlling the clutch means to be set in the disengaged state
b) and a motor control means (TR1 to TR4, 41, 41b, which controls the drive of the electric motor with a delay of a predetermined time when an automatic switch is instructed by the operation switch and stops the electric motor when the automatic switch is not instructed by the operation switch. 42, 42b, 52, 53).

(Operation of the Invention) In the present invention configured as described above, when the operation of the operation switch is instructed to automatically open or close the vehicle door, the clutch control means immediately connects the clutch means to the connected state. In addition to the setting control, the motor control means drives and controls the electric motor with a delay of a predetermined time with respect to the instruction. Therefore, after the clutch means connects the output shaft of the electric motor and the opening / closing mechanism, the electric motor starts to rotate, The vehicle door is automatically opened and closed by the rotation of the motor. Further, when the operation switch does not give an instruction to automatically open or close the vehicle door, the control means controls the electric motor to stop and sets the clutch means to the disengaged state.
While the electric motor is stopped, the electric motor and the opening / closing mechanism are mechanically separated from each other, and the door is opened / closed by manual operation.

(Effect of the Invention) As can be understood from the above description of the operation, according to the present invention,
The operation of the clutch means, the clutch control means, and the motor control means does not require the switching between the automatic open / closed state and the manual open / closed state as in the conventional device described above, and the opening / closing of the vehicle door is instructed by operating the operation switch. For example, the door will be opened and closed automatically, and at other times, it will be opened and closed manually, so it is possible to open and close the vehicle door automatically at any time, impairing the convenience of automatically opening and closing the vehicle door. Without this, the door can be opened and closed quickly in an emergency.

Further, according to the present invention, even if a person or an object is caught in the door during the automatic closing of the vehicle door by the operation switch, if the automatic closing instruction by the operation of the operation switch is canceled, Since the door can be opened and closed manually, it is convenient and at the same time has an advantage in safety. Further, according to the present invention, since the motor control means drives and controls the electric motor with a predetermined time delay in response to the automatic opening / closing instruction from the operation switch, after the clutch means connects the output shaft of the electric motor and the opening / closing mechanism. The electric motor begins to rotate, slippage of the clutch means can be prevented, the durability of the clutch means is improved, and unnecessary rotation of the electric motor can be avoided.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a perspective view of the vicinity of an entrance / exit of a vehicle such as a bus according to the present invention as viewed from the inside of the vehicle.

This vehicle is provided with a door 12 that is moved in the front-rear direction to open and close the entrance / exit 11. The door 12 is a rod 13 rotatably assembled to the rear edge 11a of the entrance / exit 11 and the center of the door 12. A pair of upper and lower arms 15 and 16 that are rotatably driven while connecting the rod 14 and both rods 13 and 14 that are rotatably mounted
It is designed to be opened and closed by. Due to this rotational drive, the lower arm 16 is, as shown in FIGS. 2 to 4,
Output shaft 21 protruding from case 20 via links 17 and 18
It is connected to the.

An electric motor 22 is housed in the case 20, and the rotation of the electric motor 22 includes a worm 23 provided on a rotation shaft of the motor 22, a wheel 24 meshed with the worm 23, and a rotation of the wheel 24. Input electromagnetic clutch 25, same clutch
The small gear 26 provided on the output shaft of 25 and the large gear 27 meshing with the small gear 26 are decelerated and transmitted to the output shaft 21. This electromagnetic clutch 25 is for connecting and disconnecting the mechanical connection between the wheel 24 and the small gear 26 by controlling energization and de-energization.
The power is transmitted to the door 12 so that the door 12 can be automatically opened and closed, and the door 12 can be manually opened and closed in the disconnected state.

Further, inside the case 20, a fully closed switch 31 and a fully opened switch 32 for detecting the fully closed state and the fully opened state of the door 12 are provided. Both of these switches 31 and 32 are made up of micro switches and are fixed to the output shaft 21 by a cam plate.
On / off control is performed according to the rotation of 28. The fully closed switch 31 is normally in the off state, and is turned on only when the door 12 is fully closed. Further, the full open switch 32 is also normally in the off state, and is turned on only when the door 12 is fully opened.

Next, an electric control device that includes the electric motor 22 and the electromagnetic clutch 25 described above, and that controls the rotational drive of the motor 22 and the conduction / non-conduction of the clutch 25 will be described with reference to FIG.

Both ends of the electric motor 22 are switchable relay switches 41, 42.
Are respectively connected to the movable contact pieces 41a and 42a. The movable contact piece 41a is switched and controlled by energization and non-conduction of the electromagnetic coil 41b. When the coil 41b is not energized, the movable contact piece 41a is connected to the fixed contact 41c (state of FIG. 1), and the coil 41b is also connected. When it is energized, it is connected to the fixed contact 41d. Similarly, the movable contact 42a is also switched and controlled by energization and non-conduction of the electromagnetic coil 42b. When the coil 42b is de-energized, it is connected to the fixed contact 42c (state of FIG. 1) and When electricity is supplied to 42b, it is connected to the fixed contact 42d. These fixed contacts 41c and 42c are commonly grounded, and the fixed contacts 41d and 42d are commonly connected to the relay switch 4
It is connected to the battery 45 via 3a and the ignition switch 44. The relay switch 43a is switch-controlled by energizing and de-energizing the electromagnetic coil 43b, and is set to an off state when the coil 43b is not energized and is set to an on state when the coil 43b is energized.

One end of the electromagnetic clutch 25 is connected to the relay switch 43a and the fixed contacts 41d of the relay switches 41 and 42 via the relay switch 46a.
It is connected to the connection point with 42d, and the other end is grounded. The relay switch 46a is switch-controlled by energizing and de-energizing the electromagnetic coil 46b, and is set to an off state when the coil 46b is not energized, and is set to an on state when the coil 46b is energized.

Further, a control circuit for controlling the energization and de-energization of the above-mentioned electromagnetic coils 41b to 43b, 46b according to the detected vehicle speed and the operation of the operation switch 47 for instructing the automatic opening and closing of the door 12 will be described.

The vehicle speed detecting means is composed of a reed switch 33 and a frequency / voltage (f / v) converter 34. Reed switch 3
Reference numeral 3 is for picking up rotation of a magnet fixed to an output shaft of a transmission (not shown), and outputs a pickup signal having a frequency proportional to the rotation, that is, the vehicle speed. The frequency / voltage converter 34 converts the pickup signal into a voltage signal proportional to the frequency of the signal, and outputs a voltage signal representing the vehicle speed. The output of the frequency / voltage converter 34 is connected to the positive side input (+) of the comparator 51, and the minute reference voltage V _ref is supplied to the negative side input (−) of the comparator 51. The voltage at the positive input of the comparator 51 is the reference voltage.
When the voltage is higher than V _ref, the voltage at one end of the electromagnetic coil 43b is kept at a high level, and when the voltage at the positive side input is lower than the reference voltage V _ref , the voltage at one end of the coil 43b is kept at a low level. The other end of the electromagnetic coil 43b is connected to a connection point between the ignition switch 44 and the relay switch 43a.

The operation switch 47 is provided in the vicinity of the driver's seat, and when the switch 47 is not operated, the movable contact 47a automatically returns to the neutral state (the state shown in FIG. 1), and the movable contact 47a changes according to the operation of the driver. Fixed setting 47b (closed side) or fixed contact 47c
It is composed of a changeover type switch that can be switched to the (open side). The movable setting 47a is connected to a connection point between the relay switch 43a and the fixed contacts 41d and 42d of the relay switches 41 and 42.

The fixed contact 47b of the operation switch 47 is connected to the input of the timer circuit 52 and is also connected to one input of the AND circuit AND1 via the resistor R1. This resistor R1 and AND circuit
The connection point with AND1 is grounded via the fully closed switch 31. The timer circuit 52 responds to the arrival of the high level signal,
A signal that goes high after a very short time Δt from the arrival of the same signal is supplied to the other input of the AND circuit AND1. The minute time Δt is set to a value slightly larger than the time required from the start of energization of the electromagnetic coil 46b until the electromagnetic clutch 25 is switched to the connected state by the energization. The output of the AND circuit AND1 is connected via a resistor R2 to the base of an NPN type switching transistor TR1 whose emitter is grounded. The collector of the transistor TR1 is connected to the base of a PNP type switching transistor TR2 via a resistor R3. The emitter of the transistor TR2 is connected to the fixed contact 47b, and its collector is grounded via the electromagnetic coil 42b.

The fixed contact 47c of the operation switch 47 is connected to the input of the timer circuit 53, and is also connected to one input of the AND circuit AND2 via the resistor R4. This resistor R4 and AND circuit
The connection point with AND2 is grounded via the full-open switch 32. The timer circuit 53 responds to the arrival of the high level signal,
A signal that goes high after a tiny time Δt (the same value as above) from the arrival of the same signal is supplied to the other input of the AND circuit AND1. The output of the AND circuit AND2 is a grounded emitter NP
Resistor R5 at the base of N-type switching transistor TR3
Connected through. The collector of the transistor TR3 is a PNP type switching transistor T via a resistor R6.
Connected to the base of R4. The emitter of the transistor TR4 is connected to the fixed contact 47c, and its collector is grounded via the electromagnetic coil 41b.

One input of each of the AND circuits AND1 and AND2 is connected to the input of the OR circuit OR1, and the output of the same circuit OR1 is connected to the base of the NPN type switching transistor TR5 whose emitter is grounded through the resistor R7. . Transistor TR5
The collector of is connected to the base of a PNP type switching transistor TR6 via a resistor R8. The emitter of this transistor TR6 has fixed contacts 47b and 47c via diodes Di1 and Di2, and has fixed contacts 47b and 47c via diodes Di1 and Di2.
47c, the collectors of which are electromagnetic coils 46b
Grounded through.

Next, the operation of the embodiment configured as described above will be described. When the ignition switch 44 is closed while the vehicle is stopped, a voltage signal from the battery 45 is applied to one end of the electromagnetic coil 43b via the ignition switch 44. In such a case, the vehicle speed detected by the reed switch 33 and the frequency voltage converter 34 is zero and the comparator 51
Since the voltage signal indicating "0" is supplied to the positive side input of the comparator 51, the comparator 51 supplies the low level signal to the other end of the electromagnetic coil 43b. As a result, the electromagnetic coil 43b is energized and the relay switch 43a is set to the ON state,
The voltage signal from the battery 45 is applied to the movable contact piece 47a of the operation switch 47.

In such a state (provided that the door 12 is closed), when the operation switch 47 is operated and the movable contact piece 47a is connected to the fixed contact 47c, the high-level signal transmitted through the operation switch 47 becomes a timer. At the same time as being supplied to the circuit 53, since the fully open switch 32 is in the off state, it is also supplied to one input of the AND circuit AND2 and the OR circuit OR1. As a result, the OR circuit OR1 supplies a high-level signal to the base of the transistor TR5 via the resistor R7.
When 5 is turned on, the transistor TR6 is also turned on. On the other hand, since the voltage signal from the battery 45 via the operation switch 47 is supplied to the emitter of the transistor TR6 via the diode Di2, the voltage signal is supplied to one end of the electromagnetic coil 46b and the coil 46b is energized. To be done. By energizing the electromagnetic coil 46b, the relay switch 46a is set to the ON state, the current from the battery 45 through the ignition switch 44 and the relay switches 43a and 46a flows to the electromagnetic clutch 25, and the clutch 25 is set to the connected state. It

Further, by supplying the high-level signal to the timer circuit 53, the circuit 53 outputs the high-level signal after Δt time from the arrival of the signal, that is, after the electromagnetic clutch 25 is switched from the disconnected state to the connected state. Supply to the other input of the circuit AND2. As a result, both input signals of the AND circuit AND2 become high level, and the circuit AND2 supplies a high level signal to the base of the transistor TR3 via the resistor R5, so that the transistor TR3 is turned on and the transistor TR4 is also turned on. Turns on. Also in this case, since the voltage signal from the battery 45 is supplied to the emitter of the transistor TR4 via the operation switch 47, the electromagnetic coil 41b is energized and the movable contact piece 41a of the relay switch 41 is fixed to the fixed contact 41d. Is switched to the side. By switching the relay switch 41, the current from the battery 45 flows to the electric motor 22 in the direction of the arrow shown by the actual battle in FIG. 1, and the motor 22 rotates normally.

In such a state, the connection state of the electromagnetic clutch 25 is completed by the action of the timer circuit 53 described above.
Rotation of 22 is worm 23, wheel 24, electromagnetic clutch 25,
It is transmitted to the output shaft 21 via the small gear 26 and the large gear 27.
When the output shaft 21 is rotated by the transmission of the rotational force, the arms 16 are rotated by the action of the links 17 and 18, and the door 12 is automatically opened.

In this way, when the door 12 is opened and fully opened,
The fully open switch 32 is turned on by the action of the cam plate 28 accompanying the rotation of the output shaft 21, and the signal supplied to one input of the AND circuit AND2 becomes low level. As a result, the AND circuit AND2 outputs a low level signal to the transistor TR.
3, the transistor TR3 is turned off and the transistor TR4 is also turned off, so that the electromagnetic coil 41b is de-energized and the movable contact 41a of the relay switch 41 is fixed. Switched to the side of 41c. as a result. The supply of the current to the electric motor 22 is stopped, the rotation of the motor 22 is stopped, and the automatic opening operation of the door 12 is also stopped.

At the same time, by the ON operation of the full-open switch 32, the signal (high level signal) supplied to one input of the OR circuit OR1 also becomes low level, and the OR circuit OR1
Since the output of will be low level, transistors TR5, TR6
Is also set to the off state. As a result, the electromagnetic coil 46b
Since the relay switch 46a is turned off by deenergizing it, the electromagnetic clutch 25 is also deenergized and the clutch 25 is set to the disengaged state.

After that, when the operation of the operation switch 47 is released and the movable contact piece 47a of the operation switch 47 returns to the neutral state, the fixed contact 4
Since the supply of the voltage signal to the 7c side is released, the energization of the electromagnetic coils 41b and 46b also continues to be released. As a result, the electric motor 22 is kept in a stopped state and the electromagnetic clutch 25 is kept in a disengaged state. In this case, the electromagnetic clutch 25 set to the disengaged state releases the mechanical connection between the electric motor 22 side and the output side 21 side, so that the door 12 can be manually opened and closed.

Further, when the operation switch 47 is operated and the movable contact piece 47a is connected to the fixed contact 47b while the door 12 is opened, a high-level signal via the operation switch 47 is supplied to the timer circuit 52. At the same time, since the fully closed switch 31 is in the off state, it is also supplied to one input of the AND circuit AND1 and the OR circuit OR1. By supplying the high-level signal to the OR circuit OR1, the transistors TR5, TR6, the electromagnetic coil 46b and the like act in the same manner as described above to set the electromagnetic clutch 25 in the connected state.

Further, the timer circuit 52 also operates in the same manner as the above-mentioned timer circuit 53 and supplies the high level signal to the other of the AND circuits AND1 after the time Δt has elapsed from the operation of the operation switch 47, so that the circuit AND1 also outputs the high level signal. Will also be output. In such a case, the transistors TR1 and TR2 are turned on by the supply of the high level signal from the AND circuit AND1, and the electromagnetic coil 42b is energized. As a result, the movable contact piece 2a of the relay switch 42 is switched to the fixed contact 42d side, so that the electric motor 22 has a current flowing in the opposite direction (the direction of the arrow shown by the broken line in FIG. 1) to the above-mentioned case. The motor 22 rotates in the reverse direction. The rotational force due to the reverse rotation of the electric motor 22 is the worm 23, the wheel 24, the electromagnetic clutch 25 in the connected state, the small gear 26, and the large gear 27, as in the case described above.
It is transmitted to the output shaft 21 via the, and the door 12 is closed by the rotation of the arm 16 by the action of the links 17 and 18.

In this way, when the door 12 is closed and is in the fully closed state,
The fully closed switch 31 is turned on by the action of the cam plate 28 accompanying the rotation of the output shaft 21, and the signal supplied to one input of each of the AND circuit AND1 and the OR circuit OR1 becomes low level. As a result, the AND circuit AND1 and the OR circuit OR1
Each output signal of becomes low level, and transistors TR1 and TR
At the same time when 2, TR5 and TR6 are set to the OFF state, the electromagnetic coil 4
Since the energization of 2b and 46b is also released, the movable contact 42a of the relay switch 42 is switched to the fixed contact 42c side, and at the same time, the relay switch 36a is turned off. As a result, the supply of the current to the electric motor 22 is stopped, the rotation of the motor 2 is stopped, the electromagnetic clutch 25 is in the disengaged state, and the automatic closing operation of the door 12 is also stopped.

Then, as in the case described above, when the operation of the operation switch 47 is released and the movable contact 47a returns to the neutral state, the supply of the voltage signal to the fixed contact 47b side is released,
The energization of the electromagnetic coils 41b and 46b continues to be released. As a result, the electric motor 22 is kept stopped and the electromagnetic clutch 25 is kept disengaged. Also in this case, the electromagnetic clutch 25 set to the disengaged state releases the mechanical connection between the electric motor 22 side and the output shaft 21 side, so that the door 12 can be opened and closed manually.

In this way, the electric motor is operated according to the operation of the operation switch 47.
22 and the drive control, rolling to the drive control to set the electromagnetic clutch 25 in the connected state, and when the operation switch 47 is not operated, the electromagnetic clutch 25 is set to the disengaged state. The operation for switching between automatic opening and closing and manual opening and closing can be omitted, and the door 12 can be opened and closed automatically and manually at any time.

In addition, when the vehicle is started from the stopped state, the frequency /
The voltage output from the voltage converter 14 increases as the vehicle speed increases, and the comparator 51 sends a high level signal to the electromagnetic coil 43b.
Will be supplied to one end. This allows the electromagnetic coil
Since the relay switch 43a is set to the off state by releasing the energization of 43b, the voltage supply from the battery 45 to the electric motor 22, the electromagnetic clutch 25, the operation switch 47, etc. is stopped, and the automatic opening / closing operation of the door 12 is performed. Impossible. as a result,
Even if the driver mistakenly operates the operation switch 47 while the vehicle is traveling, the door 12 is not automatically opened, and safety is expected to be improved.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an automatic opening / closing control circuit for a vehicle door according to an embodiment of the present invention, FIG. 2 is a perspective view of the vicinity of an entrance / exit where the door is provided, as seen from the inside of the vehicle, and FIG. FIG. 2 is an enlarged view of a portion A in FIG. 2, and FIG. 4 is a schematic diagram of a drive portion that drives the opening / closing mechanism of the door. Explanation of code 12 …… door, 15,16 …… arm, 17,18 …… link, 21…
… Output shaft, 22 …… Electric motor, 25 …… Electromagnetic clutch, 31
...... Fully closed switch, 32 ...... Fully open switch, 41,42,43a, 46
a …… Relay switch, 41b, 42b, 43b, 46b …… Electromagnetic coil, 47 …… Operation switch, 52,53 …… Timer circuit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisatoshi Ota 1 Toyota-cho, Toyota City, Aichi Prefecture Toyota Motor Co., Ltd. (72) Inventor Masakatsu Nonaka 1-cho, Toyota City, Aichi Prefecture Toyota Motor Co., Ltd. ( 72) Creator Naohisa Mimura 390 Umeda, Kosai City, Shizuoka Prefecture Asmo Stock Company In-house

Claims (1)

[Scope of utility model registration request] 1. An automatic opening / closing control device for a vehicle door, comprising: an opening / closing mechanism for opening / closing a vehicle door; an electric motor for driving the opening / closing mechanism; and an operation switch for instructing automatic opening / closing of the door. Clutch means provided between the output shaft of the electric motor and the opening / closing mechanism and electrically controlled to connect and disconnect the power transmission between the output shaft and the opening / closing mechanism, and the automatic switch opening / closing instruction by the operation switch. Clutch control means for immediately setting and controlling the clutch means in the connected state and for setting and controlling the clutch means in the disengaged state when the automatic switch is not instructed by the operation switch, and a predetermined time delay when the automatic switch is instructed by the operation switch. Motor control means for driving and controlling the electric motor and stopping and controlling the electric motor when the automatic opening / closing is not instructed by the operation switch. Automatic opening and closing control device for a vehicle door, characterized in that the provided.