JP2007177535A - Automatic opening/closing device for vehicular opening/closing body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic opening/closing device for a vehicular opening/closing body simple in structure, compact and low in cost. <P>SOLUTION: The automatic opening/closing device for the vehicular opening/closing body is provided with a control cylinder 3 for opening/closing a rear door; a driving cylinder 6 connected through an air tube to supply high pressure air to the control cylinder; and a motor 11 for driving the driving cylinder. Only the control cylinder is disposed near the opening/closing body, and the motor and the driving cylinder can be disposed under the floor or the like. With the use of high pressure gas as operating gas, for instance, the small control cylinder can be disposed near the opening/closing body to avoid narrowing a space around the opening/closing body. When the opening/closing body is the rear door, for instance, rear view can be secured with no problem, and since the gas is used as the operating gas, there is no risk of fouling and ignition incidental to an oil leakage like the case of constitution with a hydraulic circuit. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to an automatic opening / closing device for a vehicle opening / closing body suitable for automobile doors, trunk lids, back doors, tailgates, sunroof panels and the like.

2. Description of the Related Art Conventionally, there has been provided an automobile capable of automatically opening and closing various opening / closing bodies provided on a vehicle body. As one of such opening / closing bodies, a back door (or tailgate) generally attached to the rear surface of a car called a minivan and a car trunk lid called a sedan have been automatically driven in recent years. (See, for example, Patent Document 1).
JP 2002-13347 A

  In the above-mentioned patent document, since the system configuration using hydraulic pressure is used, not only the cost is increased for countermeasures against oil leakage, but also there is a problem of danger of ignition when oil leaks. . Further, in order to automatically open and close, it is necessary to configure a hydraulic circuit to be reversed, and it is conceivable to combine a switching valve or the like, but there is a problem that the circuit becomes complicated. In order to be able to close manually, it is conceivable that hydraulic oil is allowed to escape, but since a certain amount of load is generated due to the difficulty of setting the resistance to 0, not only can it be lightly closed, but also the There was a problem that the speed of operation also slowed down.

  In addition, a system configuration using an electric motor is conceivable, but in order to generate the same driving force, a general-purpose product is generally larger than a hydraulic cylinder. Therefore, in the case of a trunk lid, the amount of reduction of the trunk space (loading amount) becomes large, and in the case of a back door, if the installation place becomes a ceiling, it protrudes into the room and the rear view is narrowed. There is a problem. On the other hand, when a motor is installed in the D-pillar in the application of a minivan back door, the motor is positioned near the ears of the passengers in the rear seats, resulting in a problem that the cost of noise countermeasures increases. End up.

  In order to solve such problems and to realize a compact and inexpensive automatic opening / closing device for a vehicle opening / closing body with a simple structure, in the present invention, the opening / closing body provided in the vehicle is driven to open / close. In the vehicle opening / closing body driving apparatus, a motor, a driving gas cylinder driven by the motor, and a control device provided between the vehicle body of the vehicle and the opening / closing body so as to open / close the opening / closing body. A gas cylinder and piping for connecting the driving gas cylinder and the control gas cylinder are provided.

  In particular, the cylinder chamber of the driving gas cylinder is preferably larger than the cylinder chamber of the control gas cylinder. Further, a spring that elastically biases the piston of the driving gas cylinder so as to generate a gas pressure in the control gas cylinder necessary for maintaining the fully open state of the opening / closing body in the driving gas cylinder. A body should be provided. Further, the motor and the driving gas cylinder may be connected via a clutch, and both the cylinders may be a single acting type or a backward acting type. Further, both cylinders are of a reciprocating type, and open / close valves respectively provided to communicate the respective chambers of the control gas cylinder with the atmosphere, and when the control gas cylinder is driven, It is preferable to have valve control means for controlling the opening of the pulling-off on-off valve.

  Further, a flow rate sensor provided in the pipe and a stop detection means for determining that the opening / closing body is stopped when the flow rate of the gas detected by the flow rate sensor is equal to or less than a predetermined value are provided. And good. Further, it is preferable that a lock mechanism for holding the piston of the driving gas cylinder at a predetermined position is provided. A pressure sensor for detecting a gas pressure in the pipe; and a high-pressure gas supply means for supplying a high-pressure gas into the pipe when the pressure sensor detects that the gas pressure has decreased from a predetermined value. It is good to have. The opening / closing body may be any one of an automobile door, a trunk lid, a back door, a tailgate, and a sunroof panel.

  As described above, according to the present invention, the drive gas cylinder driven by the motor and the control gas cylinder connected to the drive gas cylinder by the pipe are configured to open and close the opening / closing body by the control gas cylinder. Therefore, only the control gas cylinder can be disposed in the vicinity of the opening / closing body, and for example, a motor and a driving gas cylinder can be disposed under the floor. For example, by using a high-pressure gas as the working gas, a small control gas cylinder can be provided near the opening / closing body, and the device around the opening / closing body can be made compact, and the space around the opening / closing body is reduced. Since it can be avoided, the rear view in the case of a back door, for example, can be ensured without any problem as an opening / closing body. Since the gas is used as a working gas, there is no risk of contamination and ignition accompanying oil leakage as in the case of a hydraulic circuit.

  In particular, by making the drive gas cylinder larger than the control gas cylinder, the control gas cylinder can be further reduced in size. In addition, the driving gas cylinder is provided with a spring body that elastically urges the piston to generate a gas pressure for maintaining the fully opened state of the opening / closing body. It is not necessary to perform control so that the gas pressure is always driven in the direction in which the gas pressure is generated, and the control can be simplified. Further, by providing a clutch between the motor and the driving gas cylinder, the resistance on the motor side is eliminated by disconnecting the clutch when the door is closed, so that it can be lightly closed when manually closing. Further, since the cylinder can be used in either a single action type or a backward action type, there is no restriction on the cylinder structure, and the degree of freedom in design is large. Furthermore, in the case of the reverse acting type, a piping structure in which the corresponding cylinder chambers of both cylinders communicate with each other is provided. In that case, an opening / closing valve communicating with the atmosphere is provided in each piping, and the piston is pressed in accordance with the operation of the cylinder. By controlling so that the solenoid valve of the piping is closed and the opening / closing valve for extracting air from the cylinder chamber is opened, the apparatus can be configured by a combination of pressurization by the piston and release to the atmosphere, and the circuit can be simplified.

  Further, by providing a flow rate sensor, it can be determined that the opening / closing body has stopped when the flow rate is less than or equal to a predetermined value. For example, a rotation sensor is provided in the motor, and the flow rate is maintained even though the motor is rotating. If it is determined that there is no foreign object, it can be determined that the foreign object has been caught, and the handling process of the pinching, such as stopping and reversing the motor, can be performed smoothly. Also, by fixing the piston of the driving gas cylinder with a lock mechanism, the piston can be fixed at a predetermined position, for example, preventing the natural opening of the open / closed body in the fully open state without depending on braking control on the motor side. Therefore, the fully open holding mechanism can be realized with a simple configuration.

  In addition, by providing a pump or gas cylinder as a pressure sensor and high-pressure gas supply means, even if a pressure drop due to gas leakage occurs, it is possible to immediately obtain an appropriate gas pressure, and a malfunction occurs in the opening / closing operation due to the gas pressure drop. Since it can prevent in advance, it can be made maintenance-free. As the opening / closing body, an automobile door, a trunk lid, a back door, a tailgate, and a sunroof panel are suitable.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view showing an automatic opening / closing device for a back door of an automobile to which the present invention is applied. In the illustrated example, a back door 2 as an opening / closing body for opening and closing an opening provided on the rear surface of the vehicle body 1 is pivotally supported at the upper portion of the vehicle body 1 so as to be freely opened and closed in the vertical direction (in the direction of arrow A in the figure). Yes. A control cylinder 3 as a control gas cylinder is connected between the vehicle body 1 and the back door 2.

  The control cylinder 3 may be a general air cylinder using air as gas as a drive medium, and includes a cylinder body 3a formed of a cylindrical body and a piston rod 3b. A piston (3c in FIG. 2) is provided in the cylinder body 3a so as to be freely reciprocally displaced coaxially. One end of an air tube 4 as a pipe communicating with a cylinder chamber 3d on the bottom side (the side opposite to the piston rod 3b side) partitioned by the piston 3c in the cylinder body 3a is connected to the cylinder body 3a. . In the illustrated example, the other end of the air tube 4 is connected to a driving device 5 disposed at an appropriate position on the floor of the vehicle body.

  As shown in FIG. 2, the drive device 5 is provided with a drive cylinder 6 as a drive gas cylinder connected to the other end of the air tube 4. The drive cylinder 6 is also a general air cylinder structure in that it has a cylinder body 6a and a piston rod 6b made of a cylindrical body like the control cylinder 3, but is one of two chambers partitioned by the piston 6c. A compression coil spring 19 as a spring body is built in the chamber on the piston rod 6b side. The other end of the air tube 4 is connected so as to communicate with a cylinder chamber 6d that is the other of the two chambers of the cylinder body 6a, and the compression coil spring 19 is a cylinder on the side connected to the air tube 4. The piston 6c is elastically biased so as to push the air in the chamber 6d to the air tube 4.

  In the illustrated example, a rack 7 is integrally provided in parallel with the piston rod 6 b of the drive cylinder 6, and a pinion 8 is engaged with the rack 7. The pinion 8 is rotationally driven by an electric motor 11 coupled via, for example, an electromagnetic clutch 9. A speed controller 12, a flow rate sensor 13, and a pressure sensor 14 are disposed in the middle of the piping of the air tube 4 in the driving device 5, and the branching passage branched upstream of them is connected via an electromagnetic valve 15. An air pump 16 as high pressure gas supply means is connected. The drive device 5 is provided with a control circuit 17 that controls the electromagnetic clutch 9, the motor 11, the electromagnetic valve 15, and the air pump 16. The control circuit 17 includes a rotation sensor 18 that detects the rotation of the motor 11. The detection signals from the flow sensor 13 and the pressure sensor 14 are input.

  Since the rotation speed of the motor 11 can be detected by the rotation sensor 18, for example, the rotation speed up to the fully open position when the fully closed position is set to 0 is stored in advance in the memory, and all the motor 11 during the opening / closing drive is stored. The opening degree of the back door 2 can be calculated by comparing with the rotation speed from the closed position. Therefore, when the rotation sensor 18 detects that the rotation speed corresponding to the stored fully open position is reached, the drive of the motor 11 can be stopped assuming that the back door 2 is in the fully open position.

  In the illustrated example, a lock motor 21 and an engagement lever 22 driven to swing by the lock motor 21 are provided as a lock mechanism for engaging the pinion 8 and stopping the rotation of the pinion 8.

  Next, the operating procedure in the switchgear having the above structure will be described below. The cylinder chambers 3d and 6d and the air tube 4 are filled with predetermined high-pressure air at the time of assembly and shipment. When the control circuit 17 receives an “open” signal from an operation switch (not shown) (for example, a wireless portable switch), the clutch 9 is brought into a connected state and the motor 11 is rotated forward to displace the rack 7 in the direction of arrow B. As a result, when the piston 6c is also displaced in the direction of arrow B, the air in the cylinder chamber 6d of the drive cylinder 6 is pushed out to the air tube 4 so that air enters the cylinder chamber 3d of the control cylinder 3 and the piston 3c moves in the direction of arrow C. Extruded in the direction of displacement. The displacement in the direction of this arrow C is the direction in which the back door 2 is opened.

  The settings such as the air pressure and the pressure receiving area of the piston 3c are designed from the thrust required to open the back door 2 to be driven. The setting of the amount of air required for the displacement of the piston 3c from the fully closed position to the fully open position is the same.

  For example, in the fully open state of the back door 2 shown in FIG. 1, in order to hold the back door 2 in that state, the engagement lever 22 is driven in the direction of the arrow D by the locking motor 21 in the illustrated example. Engage with teeth. Thereby, since rotation of the pinion 8 is stopped, the return of the piston 6c is prevented, and the back door 2 can be held in the fully open position. The same may be true when the back door 2 is stopped halfway open. For example, an open stay of an air spring type damper structure used for a back door that is only operated manually may be provided on the opposite side of the control cylinder 3, so that a fully open holding force can be obtained by the open stay. Therefore, it is possible to cope with the case where the lock mechanism is broken.

  When the control circuit 17 receives a “close” signal from the operation switch, the clutch 9 is disengaged and the motor 11 is rotated in the reverse direction to displace the rack 7 in a direction opposite to the arrow B. Then, the displacement of the piston 6c in the above direction reduces the pressure in the cylinder chamber 6d and the air in the cylinder chamber 3d is returned via the air tube 4, so that the piston 3c is in a direction opposite to the direction of the arrow C. Displace. This direction is a direction in which the back door is closed. In this way, the back door 2 can be automatically opened and closed.

  When the back door 2 is held in an open state, the clutch 9 is disengaged together with the locked state. This is because when the back door 2 is manually closed, the locked state is naturally released. However, when the motor 11 is connected, cogging torque or the like becomes resistance to the closing operation force, and the manual closing may not be performed lightly. This is to avoid the problem. In addition, since air is used as the working medium, the viscosity of air is low with respect to hydraulic oil, the air flow during manual operation is smooth, and manual opening and closing can be performed easily.

  Even when the locked state is released for some reason, the compression coil spring 19 urges the piston 6c in the direction of increasing the air pressure, and the urging direction is the fully open direction of the back door 2. Therefore, it is possible to prevent the back door 2 from being displaced in the naturally closing direction.

  Further, according to the illustrated example, the speed controller 12 is provided in order to suitably perform the opening / closing operation of the back door 2. This may be an air control device used in a general air circuit, and is set to have a predetermined flow rate in an assembly process, for example. Thereby, the opening / closing speed can be set to an arbitrary speed, and the difference in the opening / closing speed due to the assembly error of each unit can be corrected and shipped as a high-quality product. Of course, it can be readjusted during maintenance.

  Further, by detecting the air flow with the flow sensor 13, for example, when any foreign matter is sandwiched between the vehicle body 1 when the back door 2 is opened and closed, the displacement of the back door 2 stops, that is, the air flow. Will not be detected. On the other hand, when it is determined that the rotation speed by the rotation sensor 18 has not yet reached the rotation speed corresponding to the fully open position, the motor 11 continues to rotate. It can be determined that the object is caught by having stopped. Note that the rotation of the motor 11 may be stopped and further reversed when the pinch is determined. Even in this pinching, the motor 11 may continue to rotate until a stop signal is output, but the back door 2 can be stopped because air is a compressed fluid, and the pinching force by the back door 2 is large. Can be prevented.

  Further, the rotational speed of the motor 11 can be appropriately adjusted by the control circuit 17 in accordance with the detection signal of the flow sensor 13. As a result, a stable opening / closing operation at the same flow rate can always be performed even if any load level occurs with respect to environmental changes. Since the speed controller 12 is provided, the adjustment control of the rotational speed is not necessary when a sufficient air pressure and air amount are secured. Can be dealt with by adjusting the rotational speed.

  Further, the air pump 16 can be driven by the control circuit 17 in accordance with the detection signal of the pressure sensor 14 to replenish the air pressure. Note that the solenoid valve 15 is closed during normal use, but when the air pump 16 is driven to replenish the air tube 4 with high-pressure air, the solenoid valve 15 is temporarily opened. As a result, it is not necessary to provide a complete air leakage prevention structure for the piping connection portion and the like, and the piping structure can be made inexpensive. A gas cylinder may be used instead of the air pump 16. In this case, for example, a motor that serves as a drive source of the air pump 16 and its control circuit are not necessary, and the configuration of the high-pressure gas supply means can be reduced.

  In the illustrated example, various measures are taken as described above. However, the configuration of the present apparatus does not necessarily require all the elements described above. For example, the control cylinder 3, the air tube 4, the drive cylinder 6, The structure by the drive device 5 which has the motor 11 for the drive can be considered. In that case, the motor 11 is directly rotated in forward and reverse directions.

  In the illustrated example, the control cylinder 3 and the drive cylinder 6 are used as a single-acting cylinder, and both are connected by a single air tube 4. However, as shown in the second example of FIG. It can be a dynamic type. In FIG. 3, the same parts as those in the above illustrated example are denoted by the same reference numerals, and detailed description thereof is omitted.

  The same cylinder chamber 3d as described above of the control cylinder 3 and the same cylinder chamber 6d of the drive cylinder 6 are connected by the first air tube 4a as in the illustrated example, and the other cylinder chamber 3e and the drive cylinder 6 are connected. The other cylinder chamber 6e is connected by a second air tube 4b. The first air tube 4a is provided with a first speed controller 12a, a first flow rate sensor 13a, and a first pressure sensor 14a in the same manner as in the illustrated example. The second air controller 4b and the second flow rate sensor 13b are similarly arranged in the second air tube 4b. Note that the second pressure sensor 14b indicated by a two-dot chain line in the figure may be arbitrary.

  In the opening operation of the back door 2 in the second example configured as described above, the air in the cylinder chamber 3e is driven through the second air tube 4b in accordance with the movement of the piston 3c of the control cylinder 3. 6 cylinder chambers 6e. In the drive cylinder 6, since the piston 6c is displaced in the direction of arrow B in the figure, the volume of the cylinder chamber 6e is increased, so that the air sent from the cylinder chamber 3e is smoothly introduced.

  According to the second example, since the air is sent from the air chamber 6e of the drive cylinder 6 to the air chamber 3e of the control cylinder 3 in the closing operation of the back door 2, it is contrary to the arrow C in the figure of the piston 3c. The displacement in the closing direction of the side can be positively performed. In the first example, the air chamber 3c is evacuated and closed by the natural fall of the back door 2. On the other hand, in the second example, the piston displacement can be controlled as described above, so that it is shown in the figure. As described above, the flow rate, that is, the closing speed of the back door 2 can be arbitrarily set by the speed controller 12b. As a result, it is possible to perform opening and closing with even higher quality.

  In addition, the effect by the 2nd flow sensor 13b is realizable at the time of a door closing like the control by the flow volume detection at the time of the door opening in the said 1st example. Further, when the second pressure sensor 14b is provided, the air pump for the second air tube 4b as shown by a two-dot chain line, as in the case of the first electromagnetic valve 15a for the first air tube 4a. In order to selectively supply high-pressure air from 16, a pipe and a second electromagnetic valve 15b are provided, and the same control corresponding to the time when the air pressure drops in the first example can be performed. In the air pressure replenishment for the second air tube 4b, even if the air pressure is lowered, it is only the same as in the first example, so it is not particularly essential. The effect by other operation | movement is the same as that of the said 1st example.

  Next, FIG. 4 shows a third example. Also in FIG. 4, the same reference numerals are given to the same parts as those in the illustrated example, and the detailed description thereof is omitted. The third example is the same as the second example in that both air tubes 4a and 4b are used for piping, but each air tube 4a and 4b has a second opening to the atmosphere. A first atmospheric release electromagnetic valve 25a and a second atmospheric release electromagnetic valve 25b are provided, and a first flow sensor 13a and a second flow sensor 13b are provided, respectively. The control circuit 17 acts as a valve control means for controlling the atmospheric release electromagnetic valves 25a and 25b. In addition, the air pump 16 and the apparatus accompanying it are not provided.

  In the third example configured as described above, when the back door 2 is opened, the first atmosphere opening electromagnetic valve 25a is closed and the second atmosphere opening electromagnetic valve 25b is opened. Since the air in the air chamber 6d enters the air chamber 3d of the control cylinder 3 due to the displacement of the piston 6c of the drive cylinder 6, the piston 3c is displaced in the door opening direction as indicated by the arrow C in the figure. At this time, the air in the other air chamber 3e is released to the atmosphere via the second atmosphere opening electromagnetic valve 25b.

  In the closing operation of the back door, the first atmosphere opening solenoid valve 25a is opened and the second atmosphere opening solenoid valve 25b is closed contrary to the above. Then, the piston 6c of the drive cylinder 6 is displaced in the direction opposite to the arrow B in the figure, the air in the air chamber 6e flows into the air chamber 3e in the control cylinder 3, and the direction in which the piston 3c is opposite to the arrow C in the figure. It is displaced in the closing direction. At this time, the air chamber 3d is opened to the atmosphere by opening the first atmosphere opening electromagnetic valve 25a. However, if the displacement of the piston 3c increases, the air chamber 3e becomes negative pressure, so the piston 3c is displaced at a stroke. The back door 2 never closes suddenly.

  If a speed controller is provided in the same manner as in the above examples, the flow rate relative to the atmosphere can be controlled, and the open / close speed of the back door 2 can be arbitrarily set. The effects of other operations are the same as in the first example.

  In each of the above examples, air is used as the gas. However, the gas is not limited to air, and may be nitrogen gas, for example. Note that the third example is limited to air. In any case, by using gas, it is not necessary to take measures against oil leakage in hydraulic pressure, and there is no risk of contamination and ignition like oil even if leakage occurs. Further, the cylinders 3 and 6 can be disposed apart from each other by air piping. That is, the free layout of the drive cylinder 6 eliminates a protruding portion toward the indoor side, and disturbs the driver's rear view. Such a large protruding portion can be eliminated.

  In addition, even if there is no gas leakage from each pipe connection part, it is possible to use this device without any problems by replenishing the gas when there is a shortage by performing pressure check and maintenance for each vehicle inspection. You can continue.

  Moreover, a flexible bag-like bladder can be used for each air chamber 3d, 3e, 6d, and 6e of each cylinder 3 and 6. Thereby, the gas leak from the sliding contact part of piston 3c * 6c can be prevented, and omission of the air pump 16 as a gas leak countermeasure can be promoted further.

  Further, in the illustrated example, it is shown as an opening / closing device for a back door of an automobile. However, in the apparatus of the present invention, if it is an automobile, a door for getting on and off, a trunk lid in a sedan type, a so-called 1.5 box type tailgate. It can also be applied to sunroof panels.

It is a schematic diagram showing an automatic opening / closing device for a back door of an automobile to which the present invention is applied. It is a circuit diagram which shows the 1st example of a switchgear. It is a figure corresponding to FIG. 2 which shows a 2nd example. It is a figure corresponding to FIG. 2 which shows a 3rd example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 2 Back door 3 Control cylinder 4 Air tube 5 Drive device 6 Drive cylinder, 6b Piston rod 9 Clutch 11 Motor 13 Flow sensor 14 Pressure sensor 15 Solenoid valve 16 Air pump 17 Control circuit 19 Compression coil spring 21 Locking motor 22 Engagement lever

Claims (10)

In a vehicle opening / closing body drive device for driving to open / close an opening / closing body provided in a vehicle,
A motor, a driving gas cylinder driven by the motor, a control gas cylinder provided between the vehicle body of the vehicle and the opening / closing body so as to open / close the opening / closing body, and the driving gas cylinder And a pipe for connecting the control gas cylinder to the automatic opening / closing device for a vehicle opening / closing body.   2. The automatic opening / closing device for a vehicle opening / closing body according to claim 1, wherein a cylinder chamber of the driving gas cylinder is larger than a cylinder chamber of the control gas cylinder.   A spring body that elastically biases the piston of the driving gas cylinder so as to generate a gas pressure in the control gas cylinder necessary for maintaining the fully open state of the opening / closing body in the driving gas cylinder; The automatic opening / closing device for an opening / closing body for a vehicle according to claim 1, wherein the automatic opening / closing device is provided.   The automatic opening / closing device for a vehicle opening / closing body according to any one of claims 1 to 3, wherein the motor and the driving gas cylinder are connected via a clutch.   The automatic opening / closing device for a vehicle opening / closing body according to any one of claims 1 to 4, wherein both the cylinders are of a single-acting type or a backward-acting type. Both cylinders are of the reverse type,
On-off valves respectively disposed to communicate the respective chambers of the control gas cylinder with the atmosphere, and valves for controlling the opening of the on-off valves for venting the gas from the respective chambers when the control gas cylinder is driven. An automatic opening / closing device for a vehicle opening / closing body according to any one of claims 1 to 4, further comprising a control means. A flow sensor provided in the pipe;
7. A stop detection means for determining that the opening / closing body is stopped when the flow rate of gas detected by the flow sensor is equal to or less than a predetermined value is provided. An automatic opening / closing device for an opening / closing body for a vehicle according to any one of the above.   The automatic opening / closing device for a vehicle opening / closing body according to any one of claims 1 to 7, further comprising a lock mechanism for holding a piston of the driving gas cylinder at a predetermined position.   A pressure sensor that detects a gas pressure in the pipe; and a high-pressure gas supply unit that supplies a high-pressure gas into the pipe when the pressure sensor detects that the gas pressure has decreased with respect to a predetermined value. An automatic opening / closing device for an opening / closing body for a vehicle according to any one of claims 1 to 8.   The automatic opening / closing body for a vehicle according to any one of claims 1 to 9, wherein the opening / closing body is any one of an automobile door, a trunk lid, a back door, a tailgate, and a sunroof panel. Switchgear.

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