JP2005030155A - Door open/close system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door operated by a manual operation even when a driving device gets trouble in the automatic door. <P>SOLUTION: A door open/close system has a door open/close mechanism with a motor, a driving member rotating the door in the opening direction or the closing direction by a torque imparted from the motor and a clutch permitting or interrupting the transmission of the torque from the motor to the driving member and a sensor detecting the state in which a body approaches to the door. When the state in which the body approaches to the door is detected by the sensor, the rotation of the door is stopped by stopping the motor as the clutch is left as the clutch is brought to an on state, and the door can be operated manually by a clutch-off switch. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a door opening / closing system, and more particularly to a power back door opening / closing system.

Conventionally, in an automatic door that automatically opens and closes the door by remote operation from a position away from the door, when an obstacle in a predetermined area around the door is detected by a detection sensor, the opening and closing of the door is stopped or reversed to cause the door to fail. There was something that tried to prevent it from colliding with things. In this automatic door, in order to stop or reverse the opening / closing of the door, the circuit between the door opening switch and the driving device that drives the opening / closing mechanism is cut off or the driving circuit is driven in reverse.
JP 57-191123 A

  In the above-described automatic door, since the drive circuit and the opening / closing mechanism are directly connected, the door cannot be opened / closed when the drive device fails and does not operate.

  In order to solve the above problems, in the door opening and closing system of the present invention, a motor, a driving member that rotates the door in an opening direction or a closing direction by torque applied from the motor, and torque from the motor to the driving member A door opening / closing mechanism having a clutch that allows or interrupts transmission of the sensor, and a sensor that detects that the object is in proximity to the door, and when the sensor detects that the object is close to the door, The rotation of the door is stopped by stopping the motor while the clutch remains on.

  The sensor is preferably an optical sensor including a light emitting unit that emits light and a light receiving unit that receives light emitted from the light emitting unit and reflected by an object, and the light emitting unit and the light receiving unit are located at the top of the door. Can be attached.

  A clutch-off switch that shuts off torque transmission from the motor to the drive member with the clutch turned off is provided, and the motor is stopped while the clutch remains on by operating the clutch-off switch to turn the clutch off. Thus, the operation of the door whose rotation is stopped can be manually performed.

  According to the present invention, the clutch is provided with a clutch-off switch that shuts off the transmission of torque from the motor to the driving member by turning the clutch off, and when the sensor detects that the object is close to the door, the motor is stopped, and Since the door rotation is stopped by turning the clutch on, the door can be turned manually if the clutch is turned off while the motor is stopped, and the motor fails and does not operate. Even so, the door can be opened and closed.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a door opening / closing system in which the present invention is applied to a power back door will be described in detail with reference to the drawings.

<Configuration>
The back door opening and closing system according to the present embodiment opens and closes a back door 11 that is coupled to a rear surface of a vehicle body 10 by a hinge (not shown) so as to be vertically rotatable as shown in FIG. And a detection sensor (sensor) 55.

  Gas dampers 12 are provided between the left and right ends of the back door 11 and the vehicle body 10. The gas damper 12 is pivotally attached to each of the vehicle body 10 and the back door 11 so that the gas damper 12 is shortened when the back door 11 is closed and is extended when the back door 11 is opened. The gas damper 12 urges the back door 11 upward by the internal gas pressure when opening the back door 11, thereby manually opening the back door 11 (operation for opening the back door 11 upward). The operating force at the time can be reduced.

  As shown in FIGS. 1 and 2, one end of a link member (drive member) 20 is pivotally attached to a left and right end (left end in the illustrated example) of the back door 11 by a shaft 20 a. The end is coupled to a drive unit 30 provided on the left side surface 10a of the rear portion of the vehicle body 10. The drive unit 30 gives power necessary for automatic opening and closing to the back door 11 via the link member 20.

  As shown in detail in FIGS. 2 and 3, the drive unit 30 includes a motor 31, a support plate 32, a two-stage gear 34, a sector gear 35, a press plate 36, a swing arm (drive member) 37, and a press member 39. . The door opening / closing mechanism includes a drive unit 30, a swing arm 37, and a link member 20.

  The motor 31 rotates the rotating shaft 31a and the gear 31b coaxially fixed to the tip thereof by electric power supplied from the power supply 45. A clutch 40 (FIG. 4) for connecting or disconnecting the transmission path from the motor 31 to the swing arm 37 is provided inside the motor 31. With this clutch 40, it is possible to select whether to permit or block transmission of torque from the motor 31 to the back door 11 via the swing arm 37 and the link member 20. When the clutch 40 is turned on by the controller 46 connected thereto, the clutch 40 connects the transmission path from the motor 31 to the swing arm 37 to allow torque transmission from the motor 31 to the swing arm 37. When turned off, the transmission path from the motor 31 to the swing arm 37 is cut off, and the transmission of torque from the motor 31 to the swing arm 37 is cut off.

  The gear 31 b passes through a hole 32 a provided in the upper part of the support plate 32 and meshes with the driving gear 34 a of the two-stage gear 34. The driven side gear 34b concentric with the driven side gear 34a meshes with the sector gear 35, and the driven side gear 34a and the driven side gear 34b so that the rotation of the gear 31b and the rotation of the sector gear 35 form a predetermined speed ratio. The number of teeth is set. The support plate 32 has a support shaft 32b and a free rotation shaft 32c below the hole portion 32a in FIG. 3, and screw holes 32f, 32g, and 32h provided around the hole portion 32a are used for the motor 31. It is fixed to the motor 31 by screws 33a, 33b, and 33c that are screwed into screw receiving portions 31d, 31e, and 31f of the housing, respectively.

  The two-stage gear 34 is rotatably supported by the support shaft 32 b of the support plate 32, and the tip of the support shaft 32 b is press-fitted and fixed in a hole portion 36 a provided in the center portion of the pressing plate 36. On the other hand, a serration portion 32d of a free rotation shaft 32c that is rotatably supported by the support plate 32 is press-fitted and fixed in the rotation center hole 35b of the sector gear 35. The free rotating shaft 32 c has a serration portion 32 d and a non-circular cross-sectional portion 32 e, and the non-circular cross-sectional portion 32 e passes through a hole portion 36 b provided in the lower portion of the pressing plate 36, so It fits into the circular hole 37a. Accordingly, the rotation of the sector gear 35 is transmitted to the swing arm 37 via the free rotation shaft 32c. The swing arm 37 is provided with a pin 37b protruding outward at its tip. This pin 37b penetrates through a hole 20b provided at the other end of the link member pivotally attached to the back door 11 with one end at the shaft 20a.

  In the drive unit 30 having such a configuration, when the motor 31 is driven (the motor 31 is turned on) while the clutch 40 is on, the gear 31b rotates together with the rotary shaft 31a. Then, the two-stage gear 34 meshed with the gear 31b is rotated, the sector gear 35 is rotated at a predetermined speed determined by the number of teeth of the driving side gear 34a and the driven side gear 34b, and swings integrally with the sector gear 35. The arm 37 rotates.

  When the motor 31 is rotated forward and the swing arm 37 is rotated upward as shown by an arrow A in FIG. 2, the link member 20 connected to the arm 31 moves along a predetermined locus. Then, the opening operation of the back door 11 is performed. On the other hand, when the motor 31 is rotated in the reverse direction and the swing arm 37 is rotated downward as shown by the arrow B in FIG. 2, the link member 20 connected thereto moves along a predetermined locus, Along with this, a closing operation of the back door 11 (an operation of closing the back door 11 downward) is performed.

  On the other hand, when the driving of the motor 31 is stopped (the motor 31 is turned off) and the clutch 40 is turned off, the user can manually open and close the back door 11. Further, when the clutch 40 is turned on while the driving of the motor 31 is stopped and the back door 11 is in an intermediate open state, the back door 11 is held in that position.

  The user can perform automatic opening / closing and clutch-off operation of the back door 11 with an auto-open switch 61, an auto-close switch 62, and a clutch-off switch 63 provided on the main body 60a of the key 60 as shown in FIG. . The key 60 includes a main switch 64 for locking and releasing the side door, an auto-open switch 61 for automatically rotating the back door 11 from a fully closed state or a half-open state to a fully-open state, and a fully open state. Alternatively, even if the motor 31 is stopped by turning off the clutch 40 and the auto-close switch 62 for automatically rotating the back door 11 from the half-open state to the fully-closed state. Is provided with a clutch-off switch 63 for manually turning (opening / closing) the back door 11. When the user presses any of the auto-open switch 61, the auto-close switch 62, and the clutch-off switch 63, the auto-open switch 61, the auto-close switch 62, and the clutch-off switch 63 from the exit port 65 disposed on the end surface of the main body 60a. Infrared light having different wavelengths depending on the switch (for example, 800 nm when the auto-open switch 61 is pressed, 850 nm when the auto-close switch 62 is pressed, and 900 nm when the clutch-off switch 63 is pressed) When the infrared light is received by the light receiving unit 70 (FIG. 4) disposed on the rear side of the vehicle body 10 and connected to the power supply 45 and the control unit 46, the light receiving unit 70 receives the received light. Depending on the wavelength, auto open switch 61, auto close switch 62, clutch offs Detecting either is operated in pitch 63 sends a control signal to the power supply 45 and the control unit 46 based on the detection result. When the auto-open switch 61 is pressed, the motor 31 is rotated forward and a control signal for turning on the clutch 40 is sent to the power supply 45 and the control unit 46. When the auto-close switch 62 is pressed, a control signal that reversely rotates the motor 31 and turns on the clutch 40 is sent to the power supply 45 and the control unit 46. Further, when the clutch-off switch 63 is pressed, a control signal for turning off the clutch 40 is sent to the control unit 46. It is assumed that the wavelengths of infrared light emitted from the emission port 65 are the same, and light having different frequencies (for example, the auto open switch 61 is pressed by the auto open switch 61, the auto close switch 62, and the clutch off switch 63). 100 Hz, 200 Hz when the auto close switch 62 is pressed, and 300 Hz when the clutch off switch 63 is pressed.

  As shown in FIGS. 1, 2, and 6, a detection sensor 55 having a light emitting portion 56 that emits infrared light and a light receiving portion 57 that can receive infrared light is provided at the center of the uppermost portion 11 a of the back door 11. Yes. The light emitting part 56 and the light receiving part 57 are arranged downward in the tangential direction C of the back door 11 extending from the uppermost part 11a of the back door 11 to the lowermost part 11b, and the infrared light emitted from the light emitting part 56 is the lowermost part. Proceed to the 11b side. When the back door 11 is stopped or rotating, if there is an object (obstacle) that approaches or contacts the back door 11 from the outside of the vehicle body 10, the light emitted from the light emitting unit 56 is reflected by this object. The light receiving unit 57 receives the light. The light receiving unit 57 (FIG. 4) connected to the power supply 45 receives the infrared light reflected by the object and sends a control signal for stopping the motor 31 to the power supply 45. In response to this, the supply of power from the power supply 45 to the motor 31 is stopped. The detection sensor 55 is connected to the light receiving unit 70 (FIG. 4). When the user operates the auto-open switch 61, first, control signals for starting the operations of the light emitting unit 56 and the light receiving unit 57 are received. 70 is sent to the detection sensor 55, and the detection sensor 55 is activated. Subsequently, a control signal is sent from the light receiving unit 70 to the power supply 45 and the control unit 46, and the motor 31 and the clutch 40 are turned on, and the back door 11 is turned on. Is automatically opened. Here, it is preferable that the emission angle of the infrared light from the light emitting unit 56 is as wide as possible. This is for detecting an obstacle in a wide range of the back door 11. Further, the wavelength and frequency of the infrared light emitted from the light emitting unit 56 are preferably different from the wavelength and frequency of the infrared light emitted from the emission port 65 in order to prevent malfunction due to the operation of the key 60. Furthermore, the light emitting unit 56 and the light receiving unit 57 can be configured as a transmitting unit that generates ultrasonic waves and a receiving unit that can receive ultrasonic waves. Further, not only when the auto open switch 61 is operated, but also when the auto close switch 62 is operated, a control signal for starting the operation of the light emitting unit 56 and the light receiving unit 57 is sent from the light receiving unit 70 to the detection sensor 55. If it is sent, the obstacle can be detected even during the automatic closing operation. Furthermore, a sensor for detecting that the back door has been rotated is provided, and if the control signal is sent to the detection sensor 55 when the rotation of the door is started regardless of whether it is automatic or manual, the back door is manually opened and closed. It is preferable because the obstacle can be detected even when the operation is performed.

<Operation>
Next, the operation of the back door opening / closing system configured as described above will be described with reference to FIG. In FIG. 7, ● indicates that the motor 31 is on, ○ indicates that the motor 31 is off, ▲ indicates that the clutch 40 is on, and Δ indicates that the clutch 40 is off. Show.
First, the user (driver, passenger, etc.) selects whether to open the fully closed back door 11 (step S100) automatically or manually (step S101). At this time, both the motor 31 and the clutch 40 are off. When opening automatically (auto open), the auto open switch 61 of the key 60 is pressed (YES in step S101). Then, the signal from the light receiving unit 70 is received and the detection sensor 55 is activated (step S102). Subsequently, the power supply 45 and the control unit 46 receive the control signal from the light receiving unit 70, the motor 31 and the clutch 40 are turned on, and the back door 11 starts to open automatically (step S103).

  On the other hand, when the back door 11 is manually opened from the fully closed state (NO in step S101), the back door 11 is operated without operating the key 60 (step S104). Then, since both the motor 31 and the clutch 40 are in the off state and the operating force is reduced by the gas damper 12, the user can easily open the back door 11 and fully open it (step S105).

  When the detection sensor 55 detects an object (obstacle) close to the back door 11 during the automatic opening operation of the back door 11 (YES in step S106), the light receiving unit 57 controls the power supply 45 to stop the motor 31. And the motor 31 is turned off. At this time, since the clutch 40 remains on, the back door 11 stops its opening operation and is held at that position (step S107).

  On the other hand, while the object close to the back door 11 is not detected by the detection sensor 55 during the automatic opening operation of the back door 11 (NO in step S106), the automatic opening operation is continued (step S108), and an obstacle is detected. (YES in step S109), the light receiving unit 57 sends a control signal for stopping the motor 31 to the power source 45 so that the motor 31 is turned off. At this time, the clutch 40 remains in the on state. The opening operation is stopped and held at that position (step S107). On the other hand, when the obstacle is not continuously detected (NO in step S109) and the opening sensor 71 (FIG. 4) detects that the back door 11 is fully opened, the opening sensor 71 supplies power. A control signal for turning off the motor 31 and the clutch 40 is sent to 45 and the control unit 46, the motor 31 is stopped, the clutch 40 is turned off, and the automatic opening operation is finished (step S105).

  After the opening operation of the back door 11 is stopped, when the obstacle is removed by the user or when the obstacle is separated to a position that does not affect the opening operation of the back door 11 (NO in step S110), the user 11 can be selected automatically or manually (step S112). When selecting to open manually (NO in step S112), the clutch 40 is turned off by operating the clutch off switch 63 (step S113), so that the motor 31 is stopped regardless of whether it is stopped. The door 11 can be opened (step S114). At this time, since the operating force is reduced by the gas damper 12, the user can easily open the back door 11 to fully open it (step S115). On the other hand, when selecting to open the back door 11 automatically, the auto-open switch 61 of the key 60 is operated (YES in step S112). Then, the signal from the light receiving unit 70 is received and the detection sensor 55 is activated (step S102). Subsequently, the power supply 45 and the control unit 46 receive the control signal from the light receiving unit 70, the motor 31 and the clutch 40 are turned on, and the back door 11 starts to open automatically (step S103).

  Whether or not to close the back door 11 when the obstacle still remains after the opening operation of the back door 11 is stopped, or when a new obstacle is close to the back door 11 (YES in step S110). Can be selected (step S111). When the back door 11 is not closed (NO in step S111), the obstacle is removed while the back door 11 is stopped, or the obstacle is separated to a position that does not affect the opening operation of the back door 11. Measures such as moving the vehicle body 10 are taken.

  On the other hand, when it is selected to close the back door 11 (YES in step S111), it is possible to select whether to close automatically or manually (step S116). To automatically close the back door 11, the auto close switch 62 of the key 60 is operated (YES in step S116), and a control signal is sent from the power supply 45 and the control unit 46 to the motor 31 and the clutch 40 to turn them on. (Step S120).

  On the other hand, in order to manually close the back door 11 (NO in step S116), the clutch off switch 63 of the key 60 is operated to send a control signal from the control unit 46 to the clutch 40 to turn off the clutch 40 (step S118). ). In this state, the back door 11 can be closed regardless of the motor 31 being stopped (step S119), and the user can fully close the back door 11 (step S120).

A modification will be described below.
Instead of the above-described auto-open switch 61, auto-close switch 62, and clutch-off switch 63, as shown in FIG. 8, an auto-open switch 81 as a touch switch provided at the center of the lowermost part 11b, the lower side of the back door 11 You may use the auto close switch 82 and the clutch-off switch 83 as a touch switch in the center of the edge part 11c. When the user himself / herself loads and unloads the luggage from / to the back door 11, particularly when the back door 11 is manually opened / closed, it is more convenient to touch the back door 11 directly to open / close it than to remove the key 60. Because there are things. The arrangement of the auto-open switch 81, the auto-close switch 82, and the clutch-off switch 83 is not limited to the positions shown in FIG. 8, and can be set to any position as long as the back door 11 and its surroundings. Of course, an auto open switch 81, an auto close switch 82, and a clutch off switch 83, and an auto open switch 61, an auto close switch 62, and a clutch off switch 63 may be provided side by side.

  Furthermore, when the auto open switch 81, the auto close switch 82, and the clutch off switch 83 are provided around the driver's seat such as the dashboard and the steering wheel, the back door 11 can be operated without getting off the vehicle body 10.

  Further, instead of the detection sensor 55, a sensor capable of detecting that an object has touched can be provided. If this sensor is provided in a projecting manner at, for example, the lowermost part 11b, the opening operation of the back door 11 can be stopped immediately by an obstacle coming into contact with the opening operation of the back door 11. Since this sensor protrudes from the lowermost part 11b, it comes into contact with an obstacle earlier than the back door 11, and damage to the back door 11 can be minimized. Any number of sensors can be provided at any position on the back door 11. Arranging at a plurality of positions is preferable because an obstacle can be detected more reliably over a wide range on the back door 11.

  In addition, when the light receiving unit 57 is provided at a position facing the light emitting unit 56 in the lowermost part 11b, when there is an obstacle between the light emitting unit 56 and the light receiving unit 57, light emitted from the light emitting unit 56 is received. Therefore, the presence of an obstacle can be detected.

  In the above-described embodiment, the example in which the present invention is applied to the power back door has been described. However, the present invention can also be applied to an automatic door other than the back door.

  Although the present invention has been described with reference to the above embodiment, the present invention is not limited to the above embodiment, and can be improved or changed within the scope of the purpose of the improvement or the idea of the present invention.

It is a perspective view of the back of a vehicle body provided with the back door opening and closing system concerning this embodiment of the present invention, (a) shows the state where the back door closed, and (b) shows the state where the back door opened. It is a side view of the vehicle body back provided with the back door opening and closing system concerning this embodiment of the present invention. It is a disassembled perspective view of the drive part of the back door opening and closing system concerning this embodiment of the present invention. It is a block diagram which shows the control relationship of the back door opening / closing system which concerns on this embodiment of this invention. It is a top view which shows the structure of the key which concerns on this embodiment of this invention. It is the figure which looked at the detection sensor which concerns on this embodiment of this invention from the C direction of FIG. It is a flowchart which shows the flow of operation | movement of the back door opening / closing system which concerns on this embodiment of this invention. It is a perspective view of the vehicle body back provided with the back door opening and closing system which concerns on the modification of this embodiment of this invention, (a) shows the state which the back door closed, (b) shows the state which the back door opened.

Explanation of symbols

10 Car body 11 Back door 20 Link member (drive member)
30 Drive unit 31 Motor 35 Sector gear 37 Swing arm (drive member)
40 Clutch 45 Power supply 46 Control unit 55 Detection sensor (sensor)
56 Light emitting portion 57 Light receiving portion 60 Key 61 Auto open switch 62 Auto close switch 63 Clutch off switch 81 Auto open switch 82 Auto close switch 83 Clutch off switch

Claims (4)

A door opening / closing mechanism having a motor, a driving member that rotates the door in an opening direction or a closing direction by torque applied from the motor, and a clutch that allows or blocks transmission of the torque from the motor to the driving member; ,
A sensor that detects that an object is in proximity to the door;
With
When the sensor detects that the object is approaching the door, the door is stopped by turning the motor by stopping the motor while the clutch is in an on state. The door opening and closing system according to claim 1, wherein the sensor includes a light emitting unit that emits light and a light receiving unit that receives light emitted from the light emitting unit and reflected by the object. The door opening and closing system according to claim 2, wherein the light emitting unit and the light receiving unit are provided at the top of the door. A clutch-off switch that shuts off transmission of the torque from the motor to the drive member with the clutch turned off, and operates the clutch-off switch to turn the clutch off; The door opening and closing system according to claim 1, wherein the operation of the door that has stopped rotating by manually stopping the motor is manually performed.

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