JP4924510B2 - Door position control device - Google Patents

Description

  The present invention relates to a door position regulating device for regulating the opening position of a door provided on a vehicle such as an automobile.

  A hinge-type door device provided in an automobile includes a door checker for restricting the opening position of the door. A typical door checker includes an arm portion that is swingably attached to a vehicle body, and a deterrent mechanism provided on the door. The arm portion is inserted into the suppression mechanism, and the arm portion moves relative to the suppression mechanism when the door is opened and closed. Then, when the door is opened, the arm portion is restrained by the restraining mechanism, so that the door can be stopped at the fully open position or between the fully open position and the fully closed position. However, a general door checker cannot stop the door steplessly at a desired opening angle.

  Therefore, a door position regulating device has been proposed in order to be able to stop the door at a desired opening angle. For example, as disclosed in Patent Document 1 below, a door device including a pulley, a belt-like member wound around the pulley, and a lock mechanism for locking the rotation of the pulley has been proposed. In this door device, when the door moves in the opening direction, the pulley rotates via the belt-like member. Therefore, the door is prevented from further opening by preventing the pulley from rotating by the lock mechanism.

Further, as disclosed in Patent Document 2 below, a door opening operation restriction using a wire connected to an arm portion of a door checker, a pulley for winding the wire, and an electromagnetic clutch for suppressing rotation of the pulley. Devices have also been proposed. In this opening operation regulating device, when the door is opened, the pulley is rotated by pulling the wire by the arm portion of the door checker. And the movement of the door in the opening direction is restricted by suppressing the rotational movement of the pulley by the electromagnetic clutch.
Japanese Utility Model Publication No. 63-185723 JP 2007-321365 A

  For example, when an obstacle is present outside the door when the door is opened, it is desirable to stop the door before the obstacle in order to prevent the door from hitting the obstacle. When closing the door, there is no possibility that the door will hit the obstacle. However, depending on the situation, a certain amount of braking force may be required for the force applied in the direction of closing the door. For example, it is desired to generate a large braking force when the door moves in the opening direction and to generate a small braking force when the door moves in the closing direction.

  The door position regulating devices of Patent Documents 1 and 2 can rotate the rotating body because the belt-like member or the wire is pulled when the door moves in the opening direction. However, when the door moves in the closing direction, since the belt-like member and the wire rope cannot transmit the load in the compression direction, the rotating body cannot be rotated.

  Therefore, by using a mechanism that can transmit forces in both directions of the door opening and closing operations, the door position regulating device can rotate the rotating body in either the door opening or closing direction. Was considered. In the apparatus, the rotating body rotates in the first direction when the door is opened, and the rotating body rotates in the second direction when the door is closed. Then, by suppressing the rotation of the rotating body (rotation in the first direction and the second direction) by the electromagnetic clutch, it is possible to generate a braking force in either the opening operation or the closing operation of the door. .

  However, in general, an electrical component such as an electromagnetic clutch is operated by a passenger using a manual switch disposed on a door or the like, and thus there is a problem that the switch operation is troublesome. Also, when there is an obstacle outside the door, if the door is moved with the door moved to the immediate vicinity of the obstacle and the door is fixed, the vehicle body will shake or the door will be pushed strongly in the opening direction. The door may touch obstacles.

  Instead of using an electromagnetic clutch for the braking mechanism, it has been considered to use a clutch spring comprising a torsion coil spring. The coil portion of the clutch spring is wound in a state of being in close contact with the outer peripheral surface of the stationary member and the outer peripheral surface of the rotor. When the door moves in the opening direction, the rotor rotates in the winding direction of the coil portion of the clutch spring, thereby preventing the rotor from rotating. When the door moves in the closing direction, the rotor is allowed to rotate by rotating in the rewinding direction of the coil portion.

  When such a braking mechanism using a clutch spring is set to the release mode, it is necessary to forcibly bend the clutch spring in the rewinding direction by an actuator. For this reason, the actuator needs an output that can overcome the rebound resilience of the clutch spring. When the spring constant of the clutch spring is large, it is necessary to use an actuator with a large output, and there is a problem that the actuator becomes larger and the price is increased accordingly.

  Accordingly, an object of the present invention is to provide a door position regulating device capable of switching a braking mechanism from a braking mode to a release mode using a force for manually moving the door when the door is moved from the open position to the closing direction. There is.

  The door position restricting device of the present invention is a door position restricting device having a door attached to a door attaching portion of a vehicle body so as to be freely opened and closed, and a braking mechanism for braking an opening and closing operation of the door. A base member provided on the door, a fixed side member held by the base member and having an outer peripheral surface, and provided adjacent to the axial direction of the fixed side member, corresponding to the outer peripheral surface of the fixed side member A rotor having an outer peripheral surface, rotating in a first direction when the door moves in the opening direction, and rotating in a second direction when the door moves in the closing direction; and an outer peripheral surface of the stationary member A clutch spring having a coil portion wound around the outer peripheral surface of the rotor, a fixed arm portion on one end side fixed to the fixed side member, and a movable arm portion on the other end side protruding outward of the rotor. And the first direction with respect to the base member And the second direction so as to be rotatable, abutting on the movable side arm of the clutch spring when rotated in the first direction, and the movable side when rotating in the second direction A change gear having an abutting portion that is distant from the arm portion; and a change gear that is rotatable with respect to the change gear in the first direction and the second direction. A change ring having a spring support portion that pushes the clutch spring in a rewinding direction by contacting the movable side arm portion in a state of being separated from the movable side arm portion and rotated in the second direction, and the base member The change gear is allowed to rotate by being twisted in the rewind direction when torque in the first and second directions is input from the change gear side. A keep spring that prevents the change ring from rotating by being twisted in the winding direction when torque in the first and second directions is input from the zilling side, and the rotor rotates in the first direction After that, when the rotor rotates in the second direction, an electric actuator that rotates the change gear and the change ring in the first direction, and the first and second on the rotor. Rotating in the direction, held in place when the rotor rotates in the first direction, and rotated in the second direction together with the rotor when the rotor rotates in the second direction When the rotor rotates a predetermined amount or more in the second direction, the change gear and the chain are brought into contact with the arm receiving portion of the change gear. And a release arm for rotating the engineering ring in the second direction.

  In one embodiment of the present invention, when the change gear rotates in the first and second directions, the change ring can rotate in the same direction as the change gear by the same angle via the keep spring. When the change gear rotates in the first direction, the contact portion of the change gear contacts the movable arm portion of the clutch spring, and the change gear and the change ring stop. The distance from the contact portion of the change gear to the spring support portion of the change ring is kept constant.

  The coil portion of the clutch spring has a first portion that winds in close contact with the outer peripheral surface of the stationary member, and a second portion that winds in close contact with the outer peripheral surface of the rotor, When the rotor rotates in the first direction, the coil portion is twisted in the winding direction by the rotor, thereby generating a first frictional force between the rotor and the coil portion. When the rotor rotates in the second direction, the coil portion is twisted in the rewinding direction by the rotor, thereby generating a second friction force smaller than the first friction force between the rotor and the coil portion. I am doing so.

  In a more preferred embodiment, an auxiliary spring is disposed on the outer periphery of the change ring, and the auxiliary spring is brought into contact with the movable arm portion of the clutch spring in a state where the change ring is rotated in the first direction. The clutch spring is biased in the rewind direction.

  An example of the braking mechanism includes a one-way spring provided on the release arm, and the one-way spring is formed at a coil portion wound in close contact with the cylindrical portion of the rotor and at one end of the coil portion. A fixed end fixed to the release arm; and a free end formed at the other end of the coil portion, wherein the coil portion is in a rewinding direction when the rotor rotates in the first direction. The release arm is stopped at the predetermined position by being twisted, and the rotational movement of the rotor is transmitted to the release arm by being twisted in the winding direction when the rotor rotates in the second direction. The release arm is rotated from the predetermined position in the second direction.

  The braking mechanism may include a rotating arm member that taps the free end of the one-way spring in a rewinding direction of the one-way spring when the change ring rotates in the second direction.

  According to the present invention, after the door is stopped in the middle of the opening direction, when the door is slightly moved in the closing direction, the actuator is operated to rotate the change gear and the change ring in the first direction. As a result, the braking mechanism is switched to the braking mode. At the time of switching to the braking mode, the actuator does not need to be subjected to the rebound resilience of the clutch spring, so that even a small actuator with a small output can easily rotate the change gear and the change ring in the first direction. Can do.

  When the door is moved in the fully closed direction, the change gear and the change ring are driven in the second direction by the release arm by rotating the rotor and the release arm in the second direction as the door is closed. Thereby, since a brake mechanism switches to cancellation | release mode, a door can be moved to a fully closed position with small force. When switching to the release mode, the power of the actuator is unnecessary. In other words, the change gear can be moved from the brake mode position to the release mode position by using a manual door closing operation.

An embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 shows a part of an automobile 10. A door device 13 having a hinged door 12 is provided on the side of the vehicle body 11 of the automobile 10. The door 12 is supported on the vehicle body 11 by hinges 15 and 16 provided on the door attachment portion 14 of the vehicle body 11 and can be opened and closed between a fully open position and a fully closed position.

  The door device 13 includes a door checker 20. As shown in FIG. 2, the door checker 20 includes a base member 21, an arm member 22, and a stopper unit 23. The base member 21 is fixed to the front pillar of the vehicle body 11. The arm member 22 can turn in the horizontal direction around a shaft 24 provided on the base member 21. The arm member 22 attached to the base member 21 is an example of a member on the vehicle body side. The stopper unit 23 includes a lock case 25 fixed to the front frame of the door 12, an engagement member 26 built in the lock case 25, and the like. The arm member 22 is inserted into a hole 27 formed in the lock case 25 so as to be movable in a substantially horizontal direction.

  When the door 12 moves in the opening direction, the arm member 22 of the door checker 20 moves in the direction of exiting from the inside of the door 12 (the direction indicated by the arrow A1 in FIG. 2). When the door 12 moves in the closing direction, the arm member 22 moves in the direction entering the inside of the door 12 (the direction indicated by the arrow A2 in FIG. 2).

  In the middle of the arm member 22 in the length direction, a first recess 31 and a second recess 32 are formed. A stopper 33 is provided at the tip of the arm member 22. When the door 12 moves to the fully open position, the stopper 33 of the arm member 22 abuts against the lock case 25 and the engaging member 26 enters the first recess 31, whereby the door 12 is held at the fully open position. When the door 12 opens to the intermediate position, the engagement member 26 enters the second recess 32, whereby the door 12 is held at the intermediate position.

  A door position restricting device 40 is provided inside the door 12. The door position regulating device 40 is arranged in series with respect to the arm member 22 of the door checker 20. The door position regulating device 40 will be described below.

  As shown in FIG. 2, the door position regulating device 40 includes a case 41 fixed to the door 12, a rotating body 42 in the form of a pulley, a first rope body 43, a second rope body 44, A reciprocating body 45, a rod member 46, a braking mechanism 47, and the like are provided. The first rope body 43 and the second rope body 44 are tension transmission members capable of transmitting a tensile load. The rod member 46 is a compression force transmission member capable of transmitting a compression load. That is, the first rope body 43, the second rope body 44, the reciprocating body 45, and the rod member 46 each function as force transmission means.

  The rotating body 42 can rotate about the shaft 50 in the first direction R1 and the second direction R2. A gear 51 is provided on the rotating body 42. The gear 51 rotates integrally with the rotating body 42.

  A first cable body 43 is wound around a first groove 55 formed on the outer periphery of the rotating body 42 along the circumferential direction. A connection member 60 is provided at one end 43 a (shown in FIG. 2) of the first cable body 43. The connection member 60 is swingably connected to the distal end portion 61 of the arm member 22 of the door checker 20. The other end (not shown) of the first cable body 43 is fixed to the rotating body 42.

  A second cable body 44 is wound around the second groove 56 formed in the outer periphery of the rotating body 42 in the opposite direction to the first cable body 43. One end 44 a (shown in FIG. 2) of the second cable body 44 is connected to the reciprocating body 45. The other end (not shown) of the second cable body 44 is fixed to the rotating body 42.

  The 1st rope body 43 and the 2nd rope body 44 consist of wire ropes, for example. These cable bodies 43 and 44 have flexibility that can be wound around the rotating body 42 and have strength to withstand the tensile load applied when the door 12 is opened and closed. The diameter of the second cord body 44 is smaller than the diameter of the first cord body 43. The first rope body 43 and the second rope body 44 extend in opposite directions with the rotary body 42 interposed therebetween, and are respectively fed out from the rotary body 42 without being slackened. The first cable body 43 and the second cable body 44 may be band-shaped members.

  The reciprocating body 45 moves along a guide portion (not shown) provided in the case 41 in a direction approaching the rotating body 42 (direction indicated by an arrow B1 in FIG. 2) and a direction away from the rotating body 42 (FIG. 2). In the direction indicated by the arrow B2).

  The reciprocating body 45 and the connection member 60 are connected to each other by the rod member 46. The rod member 46 extends along the first cable body 43 and the second cable body 44 through the side of the rotating body 42. That is, the first rope body 43 and the second rope body 44 each extend along the rod member 46. One end 46 a of the rod member 46 is fixed to the connection member 60. The other end 46 b of the rod member 46 is fixed to the reciprocating body 45. The rod member 46 is made of a material having high rigidity such as an iron-based metal, and has a strength that does not buckle against a compressive load applied in the length direction of the rod member 46.

An example of the braking mechanism 47 is shown in FIGS. The braking mechanism 47 will be described below.
The braking mechanism 47 includes a base member 100. As shown in FIGS. 4 and 5, the base member 100 includes a cylindrical portion 101, a notch portion 102 formed on the end surface of the cylindrical portion 101, and an arm stopper 103 formed of a convex portion. The base member 100 is fixed to the case 41 (indicated by a two-dot chain line in FIG. 2) by a fixing member (not shown) such as a bolt. A rotation shaft 105 is provided at the center of the cylindrical portion 101 of the base member 100. The rotation shaft 105 is disposed on the axis X of the cylindrical portion 101.

  A stationary member 110 and a rotor (rotating member) 111 are accommodated inside the cylindrical portion 101 of the base member 100. The stationary member 110 and the rotor 111 can rotate around the rotation shaft 105. The fixed member 110 and the rotor 111 have cylindrical outer peripheral surfaces 110a and 111a, respectively. The diameters of the outer peripheral surfaces 110a and 111a are equal to each other. The stationary member 110 and the rotor 111 are arranged adjacent to each other in the axis X direction. The rotor 111 can rotate relative to the stationary member 110 about the axis X. The rotor 111 has a cylindrical portion 111b having a smaller diameter than the outer peripheral surface 111a.

  A clutch spring 120 made of a torsion coil spring is wound around the outer peripheral surface 110 a of the stationary member 110 and the outer peripheral surface 111 a of the rotor 111. The clutch spring 120 is provided at a coil portion 121 formed by winding a wire having a rectangular cross section into a coil shape, a fixed arm portion 122 provided at one end of the coil portion 121, and the other end of the coil portion 121. And a movable arm portion 123. The coil part 121 has a first part 121a and a second part 121b in the axis X direction.

  The fixed arm portion 122 is formed at the end of the first portion 121 a of the coil portion 121. The fixed arm portion 122 is fixed to the fixed member 110. The movable arm portion 123 is formed at the end of the second portion 121 b of the coil portion 121. The movable arm portion 123 extends in the radial direction of the coil portion 121 and protrudes outward from the notch portion 102 of the base member 100.

  In a free state where no external force is applied to the clutch spring 120, the inner diameter of the coil portion 121 is smaller than the diameters of the outer peripheral surfaces 110a and 111a of the stationary member 110 and the rotor 111, respectively. For this reason, in a state where the stationary member 110 and the rotor 111 are inserted inside the coil part 121, the inner peripheral surface of the coil part 121 is caused by the elastic force (coiling force) generated by the coil part 121 trying to shrink. The fixed side member 110 is in close contact with the outer peripheral surface 110 a and the outer peripheral surface 111 a of the rotor 111.

  The coil portion 121 of the clutch spring 120 is twisted in the winding direction when the rotor 111 rotates in the first direction (door opening direction) D1, and the rotor 111 rotates in the second direction (door closing direction) D2. At that time, it is wound so as to be twisted in the rewinding direction. The inner peripheral surface of the first portion 121 a of the coil part 121 is wound in a state of being in close contact with the outer peripheral surface 110 a of the stationary member 110. The inner peripheral surface of the second portion 121 b of the coil part 121 is wound in a state of being in close contact with the outer peripheral surface 111 a of the rotor 111. Since the cross section of the strand of the clutch spring 120 is a quadrangle, the contact area of the strand with respect to the stationary member 110 and the rotor 111 can be increased as compared with the strand having a circular cross section.

  A release spring 130 made of a mainspring or a torsion coil spring is provided between the base member 100 and the fixed side member 110. When the torque in the first direction D1 is input to the fixed side member 110, the release spring 130 is twisted in the first direction D1 to thereby return the fixed side member 110 to the second direction D2. It is designed to store energy.

  A gear 140 (shown in FIG. 5) is provided on the cylindrical portion 111 b of the rotor 111. The gear 140 meshes with the gear 51 of the rotating body 42 that is interlocked with the opening / closing operation of the door 12. Since the rotating body 42 rotates in the first direction R1 when the door 12 is opened, the rotor 111 rotates in the first direction D1 (door opening direction) via the gears 51 and 140. When the door 12 is closed, since the rotating body 42 rotates in the second direction R2, the rotor 111 rotates in the second direction D2 (door closing direction) via the gears 51 and 140. The number of teeth of the gear 140 is smaller than the number of teeth of the gear 51 of the rotating body 42.

  A release arm 150 is provided on the cylindrical portion 111 b of the rotor 111. The release arm 150 can rotate relatively around the axis X with respect to the cylindrical portion 111 b of the rotor 111. The release arm 150 has a spring mounting portion 151 and a convex portion 152. The protrusion 152 protrudes in the radial direction of the rotor 111. The arm stopper 103 of the base member 100 is provided on a locus drawn by the convex portion 152 when the release arm 150 rotates in the first direction D1.

  A one-way spring 160 made of a torsion coil spring is wound around the cylindrical portion 111 b of the rotor 111. One end (fixed end) 161 of the one-way spring 160 is attached to the spring attachment portion 151 of the release arm 150. The other end (free end 162) of the one-way spring 160 protrudes in the radial direction of the cylindrical portion 111b of the rotor 111. The inner peripheral surface of the coil portion 163 of the one-way spring 160 is in close contact with the outer peripheral surface of the cylindrical portion 111 b of the rotor 111. The coil part 163 is twisted in the rewinding direction when the rotor 111 rotates in the first direction D1, and the cylindrical part 111b so that it is twisted in the winding direction when the rotor 111 rotates in the second direction D2. It is wound around.

  A change gear 170 is provided on the outer peripheral side of the cylindrical portion 101 of the base member 100. The change gear 170 includes a cylindrical portion 171 that is rotatably fitted to the cylindrical portion 101 of the base member 100, a gear portion 172 that rotates integrally with the cylindrical portion 171, and a convex portion that is formed on the end surface of the cylindrical portion 171. A contact portion 173 and an arm receiving portion 174 are provided.

  The change gear 170 can rotate about the axis X with respect to the base member 100. The arm receiving portion 174 is formed on a locus drawn by the convex portion 152 when the release arm 150 rotates in the second direction D2. A pair of spring-loaded walls 175 and 176 are formed at the lower end of the cylindrical portion 171 at positions that are approximately 180 ° apart from each other in the circumferential direction.

  A change ring 180 is provided on the outer peripheral side of the change gear 170. The change ring 180 is fitted to the cylindrical portion 171 of the change gear 170 and can rotate about the axis X. A spring support portion 181 made of a convex portion is provided at the upper end of the change ring 180. At the lower end of the change ring 180, a pair of contact walls 182 and 183 are formed at positions spaced apart from each other by approximately 180 ° in the circumferential direction. The abutting walls 182 and 183 are opposed to the spring pushing walls 175 and 176 of the change gear 170 in a state where arms 192 and 193 of a keep spring 190 described later are sandwiched. A protrusion 184 is provided on the outer periphery of the change ring 180.

  A keep spring 190 made of a torsion coil spring is wound around the cylindrical portion 101 of the base member 100. The keep spring 190 includes a coil portion 191 that is in close contact with the cylindrical portion 101 of the base member 100, and a pair of arm portions 192 and 193 that protrude from both ends of the coil portion 191. The arm portions 192 and 193 protrude in the radial direction of the coil portion 191.

  As shown in FIG. 6, one arm portion 192 of the keep spring 190 is sandwiched between one spring pushing wall 175 of the change gear 170 and one abutting wall 182 of the change ring 180. The other arm portion 193 of the keep spring 190 is sandwiched between the other spring pushing wall 176 of the change gear 170 and the other abutting wall 183 of the change ring 180. Therefore, the change gear 170 and the change ring 180 can rotate in the first and second directions D1 and D2 integrally with each other via the arm portions 192 and 193 of the keep spring 190.

  When torque in the first direction D1 is input to the change gear 170, one arm portion 192 of the keep spring 190 is pushed in the rewind direction by the spring pushing wall 175 of the change gear 170, so that the coil portion 191 is expanded. For this reason, the keep spring 190 can rotate in the first direction D <b> 1 with respect to the base member 100. That is, when torque in the first direction D1 is input to the change gear 170, the change gear 170, the change ring 180, and the keep spring 190 can rotate in the first direction D1, respectively.

  When the torque in the second direction D2 is input to the change gear 170, the other arm portion 193 of the keep spring 190 is pushed in the rewind direction by the spring pushing wall 176 of the change gear 170, so that the coil portion 191 is expanded. For this reason, the keep spring 190 can rotate in the second direction D <b> 2 with respect to the base member 100. That is, when torque in the second direction D2 is input to the change gear 170, the change gear 170, the change ring 180, and the keep spring 190 can rotate in the second direction D2, respectively.

  On the other hand, when the torque in the first direction D1 is input to the change ring 180, the arm portion 193 of the keep spring 190 is pushed in the winding direction by the contact wall 183 of the change ring 180, so that the coil portion 191 is contracted. For this reason, the keep spring 190 is strongly wound around the cylindrical portion 101 of the base member 100. That is, when the torque in the first direction D1 is input to the change ring 180, the change gear 170, the change ring 180, and the keep spring 190 are fixed to the base member 100, respectively.

  When the torque in the second direction D2 is input to the change ring 180, the arm portion 192 of the keep spring 190 is pushed in the winding direction by the contact wall 182 of the change ring 180, so that the coil portion 191 is contracted. For this reason, the keep spring 190 is strongly wound around the cylindrical portion 101 of the base member 100. That is, when the torque in the second direction D2 is input to the change ring 180, the change gear 170, the change ring 180, and the keep spring 190 are fixed to the base member 100, respectively.

  Thus, when torque around the axis X is input to the keep spring 190 from the change gear 170 side, the change gear 170, the change ring 180, and the keep spring 190 are in the first and second directions with respect to the base member 100. It can rotate to D1, D2. On the other hand, when torque around the axis X is input to the keep spring 190 from the change ring 180 side, the change gear 170, the change ring 180, and the keep spring 190 are in the first and second directions with respect to the base member 100. Rotation to D1 and D2 is prevented.

  An actuator 200 is disposed in the vicinity of the outside of the change gear 170. An example of the actuator 200 is an electric motor (DC motor) that rotates in one direction (direction indicated by an arrow M1 in FIG. 3) by a direct current. The actuator 200 is provided with an output gear 201. The output gear 201 is engaged with the gear portion 172 of the change gear 170. For this reason, when the actuator 200 rotates, the change gear 170 rotates in the first direction D1. When torque in the second direction D2 is input from the change gear 170 side, the actuator 200 is driven to rotate by this torque.

  An auxiliary spring 210 made of a torsion coil spring is wound around the outer peripheral surface of the change ring 180. When the change ring 180 rotates in the first direction D1, the free end 211 of the auxiliary spring 210 hits the movable arm 123 of the clutch spring 120, thereby biasing the clutch spring 120 in the winding direction. It has become.

  A rotating arm member 220 is disposed on the side of the change ring 180. The rotating arm member 220 includes a first arm 221, a second arm 222, a spring 223, and a shaft 224. The rotating arm member 220 can turn around the shaft 224 and is biased by the spring 223 in the direction indicated by the arrow M2 in FIG.

  The tip of the first arm 221 is provided at a position where the free end 162 of the one-way spring 160 can be hit in a state where the one-way spring 160 is rotated in the second direction. That is, when the free end 162 of the one-way spring 160 moves to the vicinity of the first arm 221 and the first arm 221 rotates in the M2 direction due to the elastic force of the spring 223, the tip of the first arm 221 is moved to the end of the one-way spring 160. By hitting the free end 162, the coil portion 163 is twisted in the rewinding direction. When the change ring 180 rotates in the second direction D2, the second arm 222 causes the rotating arm member 220 to move against the elasticity of the spring 223 by the protrusion 184 of the change ring 180 against the elastic force of the arrow M2. Rotate in the opposite direction.

  A switch 230 such as a micro switch is disposed in the vicinity of the rotating arm member 220. The lever 231 of the switch 230 is provided at a position that is actuated by the convex portion 152 of the release arm 150 when the release arm 150 rotates in the second direction D2. When the switch 230 is actuated, the actuator 200 moves and the output gear 201 rotates in the direction of arrow M1 in FIG. 3, whereby the change gear 170 rotates in the first direction D1.

Next, operation | movement of the door position control apparatus 40 provided with the braking mechanism 47 of this embodiment is demonstrated.
When the door 12 moves in the opening direction, the arm member 22 of the door checker 20 moves in the direction of exiting from the inside of the door 12 (the direction indicated by the arrow A1 in FIG. 2). For this reason, when the first cable body 43 is pulled by the arm member 22, the rotating body 42 rotates in the first direction R1. That is, when the door 12 moves in the opening direction, the first rope 43 as the first force transmission member is pulled, so that the rotating body 42 rotates in the first direction R1 as the door 12 opens. To do.

When the door 12 moves in the closing direction, the door checker 20 moves in a direction protruding toward the inside of the door 12 (direction indicated by an arrow A2 in FIG. 2). For this reason, the rod member 46 moves in the direction shown by the arrow C in FIG. 2, and the reciprocating body 45 moves in the direction B <b> 2 away from the rotating body 42. Therefore, when the second cable body 44 is pulled, the rotating body 42 rotates in the second direction R2. When the rotating body 42 rotates in the second direction R2, the rotor 111 rotates in the second direction D2 via the gears 51 and 140.
That is, when the door 12 moves in the opening direction, the rotor 111 rotates in the first direction D1, and when the door 12 moves in the closing direction, the rotor 111 rotates in the second direction D2.

  FIG. 7 shows an example of the operation of the braking mechanism 47 when the door 12 is opened and closed. An example of the operation of the braking mechanism 47 will be described below with reference to steps S1 to S9 in FIG. 7 and FIGS.

[Step S1]
In step S1 shown in FIG. 7, the door 12 is moved from the closed position in the opening direction. At this time, the braking mechanism 47 is in the release mode. First, the release mode will be described.

  FIG. 8 shows a state where the braking mechanism 47 is in the release mode. In the release mode, the spring support portion 181 of the change ring 180 abuts on the movable arm portion 123 of the clutch spring 120 and pushes it in the second direction D2, so that the coil portion 121 of the clutch spring 120 is screwed in the rewind direction. It has been. At this time, the torque in the first direction D <b> 1 is input to the change ring 180 by the elastic restoring force of the clutch spring 120.

  Therefore, in the release mode, as shown in FIG. 6, the arm portion 193 of the keep spring 190 is secondly moved by the contact wall 183 of the change ring 180 by the torque in the first direction D <b> 1 generated by the elastic restoring force of the clutch spring 120. Is pushed in the direction D2. For this reason, since the coil portion 191 of the keep spring 190 is twisted in the direction of winding around the cylindrical portion 101 of the base member 100 (winding direction), the change ring 180 is fixed to the base member 100 via the keep spring 190. Therefore, the change gear 170 and the change ring 180 are prevented from rotating, and the change gear 170 and the change ring 180 are held in the release mode position.

  In this release mode, the spring support portion 181 of the change ring 180 pushes the movable arm portion 123 of the clutch spring 120 in the rewinding direction of the coil portion 121. For this reason, the diameter of the coil portion 121 is slightly widened, and the inner peripheral surface of the coil portion 121 is separated from the outer peripheral surface 110 a of the stationary member 110 and the outer peripheral surface 111 a of the rotor 111. That is, since the friction between the rotor 111 and the coil part 121 is substantially eliminated, the rotor 111 moves in either the first direction D1 or the second direction D2 with respect to the stationary member 110. However, no braking force is generated, and the door 12 can be opened and closed with a small force.

  When the door 12 is opened, the rotor 111 rotates in the first direction D1, and thus the rotor 111, the release arm 150, and the one-way spring 160 rotate together in the first direction D1. For this reason, as shown in FIG. 9, when the back surface of the convex portion 152 of the release arm 150 comes into contact with the arm stopper 103 of the base member 100, the release arm 150 stops at a predetermined position and is held at that position. The In this state, when the door 12 further moves in the opening direction and the rotor 111 rotates in the first direction D1, the rotor 111 rotates in the rewinding direction of the one-way spring 160, so that the release arm 150 and the one-way spring 160 are in the predetermined position. The rotor 111 is allowed to rotate in the first direction D1.

  When the door 12 is opened, if there is an obstacle or the like outside the door 12, it is necessary to stop the door 12 before the obstacle. Even when there are no obstacles outside the door 12, it may be desired to stop the door 12 in the middle of the opening direction depending on the situation.

[Step S2]
In step S2 of FIG. 7, the door 12 is stopped halfway in the opening direction.
[Step S3]
In step S3 in FIG. 7, the door 12 is slightly moved in the closing direction.

[Step S4]
When the door 12 is moved slightly in the closing direction, the rotor 111 rotates in the second direction (door closing direction) D2, so that the convex portion 152 of the release arm 150 moves away from the arm stopper 103 and the convex portion 152 of the release arm 150. Activates the switch 230.

[Step S5]
When the actuator 200 is actuated by the switch 230, the change gear 170 rotates in the first direction D1. When the change gear 170 rotates in the first direction D1, the spring pushing wall 175 of the change gear 170 pushes one arm portion 192 of the keep spring 190 in the first direction D1. For this reason, the coil portion 191 of the keep spring 190 is twisted in the rewinding direction. Therefore, the change gear 170 is allowed to rotate in the first direction D1, and the change ring 180 also rotates in the first direction D1.

[Step S6]
As shown in FIG. 10, the change gear 170 and the change ring 180 rotate in the first direction D1, and the contact portion 173 of the change gear 170 contacts the movable arm portion 123 of the clutch spring 120. The rotation of the change gear 170 and the change ring 180 stops, and the braking mechanism 47 is switched to the braking mode. In the braking mode, the spring support portion 181 of the change ring 180 is separated from the movable arm portion 123 of the clutch spring 120, so that the coil portion 121 of the clutch spring 120 is connected to the outer peripheral surface 110 a of the stationary member 110 and the outer peripheral surface 111 a of the rotor 111. As a result, a braking force is generated between the coil portion 121 of the clutch spring 120 and the rotor 111.

  As described above, when the door 12 is opened, the door 12 is temporarily stopped before the obstacle, and then switched to the braking mode at a position slightly returned in the closing direction, so that the distance from the door 12 to the obstacle is ensured. be able to. For this reason, even if the vehicle body 11 shakes or the door 12 is pushed in the opening direction, the door 12 can be prevented from touching an obstacle.

  When a large force is applied to the door 12 in the opening direction under the braking mode, the rotor 111 rotates in the tightening direction (first direction D1) of the clutch spring 120, resulting in the state shown in FIG. That is, the movable arm 123 moves in the direction of tightening the clutch spring 120 due to the torque applied in the first direction D1, so that the clutch spring 120 winds around the rotor 111 more strongly. For this reason, a very large first frictional force is generated between the clutch spring 120 and the rotor 111. The first frictional force restrains the rotor 111 from rotating in the first direction D1. Therefore, the door 12 is further prevented from moving in the opening direction.

  A release spring 130 (shown in FIGS. 4 and 5) is provided between the fixed member 110 and the base member 100. Therefore, when the torque in the first direction D1 is input to the fixed side member 110 and the rotor 111, the fixed side member 110 tries to rotate in the first direction D1 against the elasticity of the release spring 130. Accordingly, the fixed side member 110 and the rotor 111 rotate in the first direction D1 while the release spring 130 is bent. Therefore, as shown in FIG. 11, the movable arm portion 123 of the clutch spring 120 moves in the tightening direction (first direction D <b> 1) of the clutch spring 120. That is, the movable arm 123 moves in the direction of the arrow P1. When the torque in the first direction D1 increases, the movable arm portion 123 abuts against the spring support portion 181, and thus the amount that the movable arm portion 123 can move in the direction of the arrow P1 is limited.

  Therefore, when the torque in the first direction D1 applied to the rotor 111 exceeds a certain magnitude, the outer peripheral surface 110a of the rotor 111 is circumferential with respect to the inner peripheral surface of the coil portion 121 of the clutch spring 120. Begin to slip. Therefore, the door 12 can be pushed open against the braking force in a state where a large braking force is generated in the opening direction of the door 12.

  According to the braking mechanism 47 of the present embodiment, the distance from the spring support portion 181 of the change ring 180 to the contact portion 173 of the change gear 170 can always be kept constant. That is, as described above, the change gear 170 and the change ring 180 can rotate by the same angle in the same direction via the keep spring 190, and when the change gear 170 rotates in the first direction D1. The change gear 170 and the change ring 180 are simultaneously stopped when the contact portion 173 abuts against the movable arm portion 123 of the clutch 120 spring. For this reason, the distance from the contact part 173 of the change gear 170 to the spring support part 181 of the change ring 180, that is, the distance corresponding to the angle θ shown in FIG. 11 is kept constant.

  For this reason, even when variations in manufacturing of the clutch spring 120 and changes in characteristics due to aging occur, the distance from the spring support portion 181 to the contact portion 173 is kept constant, so that in the braking mode. The torque that can move the door 12 in the opening direction can be kept substantially constant.

In the braking mode described above, the door 12 can be moved in the closing direction with a relatively small force. The reason will be described below.
As shown in FIG. 10, the spring support portion 181 is separated from the movable arm portion 123 under the braking mode. For this reason, when a force in the second direction D2 is applied to the rotor 111, the rotor 111 is in the rewinding direction of the clutch spring 120 while the inner peripheral surface of the coil portion 121 of the clutch spring 120 is in contact with the outer peripheral surface 111a of the rotor 111. It can rotate while sliding in the (second direction D2).

  At this time, a second friction force smaller than the first friction force is generated between the rotor 111 and the coil portion 121 based on the initial tightening force of the coil portion 121. For this reason, the rotor 111 can rotate in the second direction D2 while receiving an appropriate resistance (dynamic frictional force). Therefore, even in the braking mode, the door 12 can be moved in the closing direction with a force smaller than the opening direction, and an appropriate resistance can be given to the closing operation of the door 12.

  As described above, in the braking mechanism 47 of the present embodiment, when the door 12 is moved in the opening direction in the braking mode, a large first frictional force is generated, and when the door 12 is moved in the closing direction, the first friction is generated. A second frictional force smaller than the force is generated.

  In the braking mechanism 47 of this embodiment, an auxiliary spring 210 is disposed on the outer periphery of the change ring 180. When the change ring 180 rotates in the first direction D1 and switches to the braking mode, the free end 211 of the auxiliary spring 210 comes into contact with the movable arm portion 123 of the clutch spring 120 and the auxiliary spring 210 is twisted. As a result, the clutch spring 120 is biased in the tightening direction. For this reason, the initial winding force with respect to the rotor 111 of the clutch spring 120 can be increased.

  Further, when the rotor 111 rotates in the second direction D <b> 2, the movement of the clutch spring 120 attempting to bend in the rewinding direction can be suppressed by the auxiliary spring 210. For this reason, the frictional force generated between the rotor 111 and the clutch spring 120 can be increased as compared with the case where the auxiliary spring 210 is not provided. That is, by using the auxiliary spring 210 in combination, the braking force when the door 12 moves in the closing direction can be increased without increasing the spring constant of the clutch spring 120. In addition, by changing the specification (for example, spring constant) of the auxiliary spring 210, the magnitude of the second frictional force generated when the rotor 111 rotates in the second direction D2 can be easily changed (adjusted). Is possible.

[Step S7]
When the door 12 is desired to be fully closed from the middle of the open position, or when it is desired to be fully closed from the fully open position, the door 12 needs to be moved with as little force as possible. Therefore, the braking mechanism 47 of this embodiment automatically switches from the braking mode to the release mode using the movement of the door 12 when the door 12 is moved to some extent in the closing direction, as will be described below. It has a function. Therefore, in step S7, the door 12 is moved in the closing direction.

[Step S8]
When the door 12 moves in the closing direction, the rotor 111 rotates in the second direction D2 as shown in FIG. 12, and the one-way spring 160 is twisted in the winding direction, so that the one-way spring 160 is moved in the second direction D2. Rotate. For this reason, the release arm 150 also rotates in the second direction D2. When the door 12 further moves in the closing direction, the convex portion 152 of the release arm 150 contacts the arm receiving portion 174 of the change gear 170 as shown in FIG. Therefore, the change gear 170 rotates with the release arm 150 in the second direction D2.

  When the change gear 170 rotates in the second direction D2, the spring pushing wall 176 of the change gear 170 pushes the arm portion 193 of the keep spring 190 (shown in FIG. 6) in the second direction D2. The coil portion 191 is twisted in the rewind direction. Therefore, the change gear 170 and the change ring 180 can rotate in the second direction D2.

[Step S9]
FIG. 14 shows a state in the middle of switching of the braking mechanism 47 to the release mode. In this state, the spring support portion 181 of the change ring 180 pushes the movable arm portion 123 of the clutch spring 120 in the second direction (rewinding direction of the clutch spring 120). Therefore, the coil part 121 of the clutch spring 120 is twisted in a direction that slightly expands.

  As the rotor 111 continues to rotate in the second direction D2, the release arm 150 and the change gear 170 continue to rotate in the second direction D2. A protrusion 184 provided on the outer periphery of the change ring 180 rotates the second arm 222 of the rotating arm member 220 in the direction of arrow M3 in FIG.

  When the change ring 180 further rotates in the second direction D2, as shown in FIG. 15, at the moment when the protrusion 184 passes through the second arm 222, the rotating arm member 220 is moved in the M2 direction by the elasticity of the spring 223. By rotating, the tip of the first arm 221 strikes the free end 162 of the one-way spring 160 in the rewind direction of the one-way spring 160. As a result, the coil portion 163 of the one-way spring 160 is forcibly expanded, and the friction between the one-way spring 160 and the rotor 111 is instantaneously released.

  In this way, it is possible to switch to the release mode. As described above, in the release mode, the friction between the coil portion 121 and the rotor 111 is substantially eliminated, and the rotor 111 can be rotated in the second direction D2 with a small force. That is, since the resistance of the closing operation of the door 12 is minimized, the door 12 can be moved to the fully closed position with a small force.

  As described above, according to the door device 13 of the present embodiment, when there is an obstacle on the outside of the door 12 when the door 12 is opened, the door 12 is stopped at a position immediately before the obstacle, When 12 is slightly moved in the closing direction, the actuator 200 is activated, and the braking mechanism 47 is switched to the braking mode. For this reason, at a position slightly away from the obstacle, the door can be restrained by exerting a large braking force against the force applied in the opening direction. With respect to the force applied in the closing direction, the door 12 can be moved in the opening direction with a small braking force generated.

  When the door 12 is moved toward the fully closed position, the change gear 170 is moved in the second direction in accordance with the closing operation of the door 12 as described above, and the braking mechanism 47 is switched to the release mode. At the time of switching to the release mode, the actuator 200 only rotates following. That is, the braking mechanism 47 can be switched from the braking mode to the release mode by using the force for manually closing the door 12. After switching to the release mode, the door 12 can be easily moved to the fully closed position with a small force.

  According to the door position regulating apparatus 40 of the present embodiment, when the door 12 is moved in the fully closed direction, the braking mechanism 47 can be switched from the braking mode to the release mode using the closing operation of the door 12. The actuator 200 used for switching from the release mode to the braking mode only needs to generate torque that can rotate the change gear 170 and the change ring 180 in the first direction, and needs to counter the elasticity of the clutch spring 120. Therefore, a small actuator 200 with a small output is sufficient. Therefore, the actuator 200 can be reduced in size and cost can be reduced.

  Note that one end 43 a of the first cable body 43 and one end 46 a of the rod member 46 may be connected to members on the vehicle body side other than the door checker 20. In short, it is sufficient that the rotor is rotated in the first direction when the door is opened, and the rotor is rotated in the second direction when the door is closed. The force transmission means for rotating the rotor in the first and second directions in accordance with the opening / closing operation of the door may be a member other than a wire rope or a rod.

1 is a perspective view of a part of an automobile provided with a door position restriction device according to an embodiment of the present invention. The perspective view of the door position control apparatus and door checker of the motor vehicle shown in FIG. The perspective view of the braking mechanism of the door position control apparatus shown by FIG. FIG. 4 is an exploded perspective view of the braking mechanism shown in FIG. 3. Sectional drawing of the brake mechanism in alignment with F5-F5 line | wire in FIG. Sectional drawing of the brake mechanism in alignment with F6-F6 line | wire in FIG. The figure which represented an example of operation | movement of the braking mechanism shown by FIG. 3 in order of operation | movement. FIG. 4 is a perspective view when the braking mechanism shown in FIG. 3 is in a release mode. FIG. 4 is a perspective view when a rotor of the braking mechanism shown in FIG. 3 rotates in a first direction. FIG. 4 is a perspective view when the braking mechanism shown in FIG. 3 is switched to a braking mode. FIG. 4 is a perspective view when the brake mechanism shown in FIG. 3 is in a braking mode and the rotor rotates in a first direction. FIG. 4 is a perspective view when the braking mechanism shown in FIG. 3 is in a braking mode and the rotor is slightly rotated in a second direction. FIG. 4 is a perspective view when the braking mechanism shown in FIG. 3 is in a braking mode and the rotor further rotates in a second direction. The perspective view of the state in the middle of the braking mechanism shown by FIG. 3 switching from the braking mode to the cancellation | release mode. FIG. 4 is a perspective view of a state immediately before the braking mechanism shown in FIG. 3 is switched from a braking mode to a release mode.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Automobile 11 ... Car body 12 ... Door 40 ... Door position control apparatus 47 ... Braking mechanism 100 ... Base member 110 ... Fixed side member 111 ... Rotor 120 ... Clutch spring 121 ... Coil part 122 ... Fixed side arm part 123 ... Movable side arm Part 150 ... Release arm 160 ... One-way spring 170 ... Change gear 173 ... Contact part 174 ... Arm receiving part 180 ... Change ring 181 ... Spring support part 190 ... Keep spring 210 ... Auxiliary spring 220 ... Rotating arm member 230 ... Switch

Claims (6)

A door that can be freely opened and closed at the door mounting portion of the vehicle body;
A door position restriction device having a braking mechanism for braking the opening and closing operation of the door,
The braking mechanism is
A base member provided on the door;
A fixed-side member held by the base member and having an outer peripheral surface;
The fixed side member is provided adjacent to the axial direction, has an outer peripheral surface corresponding to the outer peripheral surface of the fixed side member, and rotates in a first direction when the door moves in the opening direction. A rotor that rotates in a second direction when moving in a closing direction;
The coil portion is wound around the outer peripheral surface of the fixed side member and the outer peripheral surface of the rotor, the fixed side arm portion on one end side is fixed to the fixed side member, and the movable side arm portion on the other end side is the rotor. A clutch spring protruding outward of the
The base member is rotatably provided in the first direction and the second direction, and contacts the movable arm portion of the clutch spring when rotated in the first direction, and the second member A change gear having an abutting portion that moves away from the movable arm when rotated in the direction of
The change gear is provided so as to be rotatable in the first direction and the second direction, and is separated from the movable arm portion of the clutch spring in the second direction when rotated in the first direction. A change ring having a spring support portion that pushes the clutch spring in a rewinding direction by contacting the movable arm portion in a state of being rotated
The change ring is wound around the base member and is allowed to rotate by being twisted in a rewinding direction when torque in the first and second directions is input from the change gear side. A keep spring that prevents the change ring from rotating by being twisted in the winding direction when torque in the first and second directions is input from the side;
An electric actuator for rotating the change gear and the change ring in the first direction by operating when the rotor rotates in the second direction after the rotor rotates in the first direction; A rotor is rotatably provided in the first and second directions, and is held in a predetermined position when the rotor rotates in the first direction, and the rotor is rotated in the second direction. When the rotor rotates together with the rotor in the second direction and the rotor rotates a predetermined amount or more in the second direction, the change gear and the change ring are brought into contact with the arm receiving portion of the change gear. A release arm that rotates in the direction of 2;
A door position restricting device comprising:   When the change gear rotates in the first and second directions, the change ring can rotate through the keep spring in the same direction as the change gear by the same angle, and the change gear is in the first direction. The change gear and the change ring stop when the abutment portion of the change gear abuts on the movable arm portion of the clutch spring, and the change gear abuts. The door position regulating device according to claim 1, wherein a distance from a portion to the spring support portion of the change ring is kept constant. The coil portion of the clutch spring is
A first portion wound in close contact with the outer peripheral surface of the fixed side member;
A second portion wound in close contact with the outer peripheral surface of the rotor,
When the rotor rotates in the first direction, the coil portion is twisted in the winding direction by the rotor, thereby generating a first frictional force between the rotor and the coil portion,
When the rotor rotates in the second direction, the coil portion is twisted in the rewinding direction by the rotor, whereby a second friction force smaller than the first friction force is formed between the rotor and the coil portion. The door position regulating device according to claim 1 or 2, wherein a frictional force is generated.   An auxiliary spring is disposed on the outer periphery of the change ring, and the auxiliary spring winds the clutch spring by coming into contact with the movable arm portion of the clutch spring when the change ring is rotated in the first direction. The door position restricting device according to claim 3, wherein the door position restricting device is biased in a tightening direction.   The braking mechanism includes a one-way spring provided on the release arm, and the one-way spring is formed at a coil portion wound in close contact with the cylindrical portion of the rotor, and formed at one end of the coil portion. A fixed end fixed to the arm and a free end formed at the other end of the coil portion, the coil portion being twisted in the rewind direction when the rotor rotates in the first direction. Thus, the release arm is stopped at the predetermined position, and when the rotor rotates in the second direction, the rotor is twisted in the winding direction, thereby transmitting the rotational motion of the rotor to the release arm. The door position restricting device according to claim 1, wherein the door position restricting device is rotated in the second direction from the predetermined position.   The braking mechanism includes a rotating arm member that taps the free end of the one-way spring in a rewinding direction of the one-way spring when the change ring rotates in the second direction. Item 6. The door position restricting device according to Item 5.

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