JP4973567B2 - 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. In addition, when an actuator is used, a control circuit, a switch, a harness, and the like are necessary, which not only complicates the structure but also increases the cost.

  Accordingly, an object of the present invention is to provide a door position restricting device capable of switching between a braking mode and a release mode using an opening / closing operation of a door without using an actuator.

  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 in the second direction so as to be rotatable, in the state rotated in the first direction, separated from the movable side arm portion of the clutch spring, and in the state rotated in the second direction, the movable side A change ring provided with a spring support that pushes the clutch spring in the rewinding direction by contacting the arm, biasing means for biasing the change ring in the first direction, and Detent means for preventing the change ring from rotating in the first direction in a state of rotating in the second direction against the elasticity of the biasing means, and the rotor in the first and second directions The rotor rotates in the first direction and stops at a predetermined position, and when the rotor rotates in the second direction, the rotor and the rotor move in the second direction. By rotating, the detent means is operated to rotate the change ring in the first direction, and when the rotor further rotates in the second direction, the rotor contacts the arm receiving portion of the change ring. And a release arm that rotates the change ring in the second direction.

  In one aspect of the present invention, the detent means is provided on the change ring and a first arm driven by the release arm when the release arm rotates in the first and second directions. A second arm that prevents the change ring from rotating in the first direction by engaging with a rotation stop portion, and the release arm when the release arm rotates in the first direction. By rotating only the first arm, the state where the second arm is engaged with the rotation stop portion is maintained, and the release arm is moved to the first direction when the release arm rotates in the second direction. The second arm is configured to be disengaged from the rotation stop portion by simultaneously rotating the arm and the second arm.

  In a more preferred form, the coil portion of the clutch spring is wound around the outer peripheral surface of the stationary member in a close contact with the first portion, and the second portion is wound around the outer periphery of the rotor in a close contact state. 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, so that the second friction force is smaller than the first frictional force between the rotor and the coil portion. This produces a friction force.

  An auxiliary spring is disposed on the outer periphery of the change ring, and the auxiliary spring contacts the movable arm of the clutch spring when the change ring rotates in the first direction. May be biased in the winding direction.

  The braking mechanism includes a one-way spring provided on the release arm, and the one-way spring includes a coil portion wound in close contact with a cylindrical portion of the rotor, and the rotor is the first portion. When rotating in the direction, one end of the one-way spring comes into contact with one spring pushing wall of the release arm and the coil portion is twisted in the winding direction, so that the release arm rotates in the first direction. When the rotor rotates in the second direction, the other end of the one-way spring comes into contact with the other spring pushing wall of the release arm, and the coil portion is twisted in the winding direction so that the release arm is It may be configured to rotate 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 change ring rotates in the first direction, so that the braking mechanism is switched to the braking mode. When the door is moved in the fully closing direction, the change ring is driven in the second direction along with the door closing operation, and the braking mechanism is switched to the release mode. That is, it is possible to switch between the braking mode and the release mode without using an actuator by utilizing a manual door closing operation.

Hereinafter, one embodiment of the present invention will be described 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 a spring 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 includes a convex portion 152 that protrudes in the radial direction of the rotor 111 and a pair of spring-loaded walls 155 and 156.

  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 161 of the one-way spring 160 faces one spring pushing wall 155 of the release arm 150. The other end 162 of the one-way spring 160 faces the other spring pushing wall 156 of the release arm 150.

  The inner peripheral surface of the coil portion 163 of the one-way spring 160 is wound in close contact with the outer peripheral surface of the columnar portion 111b of the rotor 111. When the rotor 111 rotates in the first direction D1, one end 161 of the one-way spring 160 comes into contact with the spring pushing wall 155, and the other end 162 of the one-way spring 160 moves away from the spring pushing wall 156, whereby the coil portion 163 is wound. Twisted in the tightening direction. When the rotor 111 rotates in the second direction D2, the other end 162 of the one-way spring 160 comes into contact with the spring pushing wall 156, and the one end 161 of the one-way spring 160 moves away from the spring pushing wall 155, whereby the coil portion 163 is wound. It is designed to be twisted in the tightening direction.

  A change ring 180 is provided on the outer peripheral side of the cylindrical portion 101 of the base member 100. The change ring 180 can rotate around the axis X with respect to the cylindrical portion 101 of the base member 100. At the upper end of the change ring 180, a spring support portion 181 made of a convex portion, a contact portion 182 protruding in the radial direction of the change ring 180, and an arm receiving portion 183 protruding in the axis X direction are provided. The arm receiving portion 183 is formed on a locus drawn by the convex portion 152 when the release arm 150 rotates in the second direction D2.

  On the outer periphery of the change ring 180, a protrusion 184 is provided which is a protrusion protruding in the radial direction. The protrusion 184 has a rotation stopper 184a that can be engaged with and disengaged from the second arm 222, which will be described later, and a guide surface 184b that contacts the second arm 222 when the change ring 180 rotates in the second direction D2. Have. A groove 185 is formed in the vicinity of the protrusion 184 of the change ring 180.

  As shown in FIGS. 5 and 6, a return spring 190 including a torsion coil spring is provided inside the change ring 180. The coil portion 191 of the return spring 190 is wound around the cylindrical portion 101 of the base member 100. One end 192 of the return spring 190 is locked to the base member 100. The other end 193 of the return spring 190 is inserted into the groove 185 of the change ring 180 with the coil portion 191 being twisted. The return spring 190 biases the change ring 180 in the first direction D1. That is, the return spring 190 functions as an urging means for rotating the change ring 180 in the first direction D1.

  A damper 200 is disposed on the side of the change ring 180. The damper 200 is attached to a fixed-side member (for example, the case 41) (not shown). When the change ring 180 rotates in the first direction D1, the contact portion 182 contacts the damper 200, so that the rotation of the change ring 180 in the first direction D1 stops and the impact generated by the contact. To relax. In other words, the damper 200 has both a function as a buffer member and a function as a stopper.

  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 shaft 224, a first arm spring 225 made of a torsion coil spring, and a second arm spring 226 made of a torsion coil spring. is doing.

  One end 225 a and the other end 225 b of the first arm spring 225 are connected to the first arm 221 and the second arm 222, respectively. The first arm spring 225 biases the first arm 221 in the clockwise direction (the direction indicated by the arrow M1). One end 226a and the other end 226b of the second arm spring 226 are connected to the second arm 222 and a fixing member 227 (shown in FIG. 5), respectively. The second arm spring 226 biases the second arm 222 in the counterclockwise direction (the direction indicated by the arrow M2).

  As shown in FIGS. 6 and 7, a pair of vertical walls 230 and 231 are formed at the lower end of the first arm 221. Opposing walls 232 and 233 are formed on the upper end of the second arm 222 at positions facing the vertical walls 230 and 231 in the rotational direction of the first arm 221. A gap having an angle α (shown in FIG. 6) exists between one vertical wall 231 and the opposing wall 233.

  For this reason, the first arm 221 can rotate relative to the second arm 222 by an angle α. For example, when the first arm 221 receives an external force in the direction of the arrow M2, if the vertical wall 230 moves away from the opposing wall 232 within the range of the angle α, only the first arm 221 rotates in the direction of the arrow M2. . Conversely, when the first arm 221 receives an external force in the direction of the arrow M1, the vertical wall 230 abuts against the opposing wall 232, so that the first arm 221 and the second arm 222 are integrated with each other in the direction of the arrow M1. To turn.

  The tip of the first arm 221 is provided at a position where one end 161 of the one-way spring 160 can be hit in the rewinding direction of the coil portion 163 when the one-way spring 160 rotates in the second direction. When the release arm 150 rotates in the first direction D1, the convex portion 152 of the release arm 150 contacts the first arm 221 from the first direction D1, so that the first arm 221 rotates in the arrow M2 direction. Conversely, when the release arm 150 rotates in the second direction D2, the convex portion 152 of the release arm 150 hits the first arm 221 from the second direction D2, so that the first arm 221 moves in the direction of the arrow M1. It is designed to rotate.

  When the second arm 222 rotates in the direction of the arrow M1, the tip of the second arm 222 is detached from the rotation stopper 184a, so that the change ring 180 can be rotated in the first direction. Conversely, when the second arm 222 rotates in the direction of the arrow M2, the tip of the second arm 222 engages with the rotation stopper 184a of the protrusion 184 of the change ring 180, so that the change ring 180 is in the first direction. D1 is prevented from rotating, and the rotation of the change ring 180 is locked. That is, the protrusion 184 and the rotating arm member 220 constitute detent means for preventing the change ring 180 from rotating 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. 8 shows an example of the operation of the braking mechanism 47 when the door 12 is opened and closed. Hereinafter, an example of the operation of the braking mechanism 47 will be described with reference to steps S1 to S9 in FIG. 8 and FIGS.

[Step S1]
In step S1 shown in FIG. 8, 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. 9 shows a state in which 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 change ring 180 is biased in the first direction D <b> 1 by the elastic restoring force of the clutch spring 120. Further, the elastic restoring force of the return spring 190 biases the change ring 180 in the first direction D1.

  Here, since the second arm 222 of the rotating arm member 220 is in contact with the rotation stopper 184a of the change ring 180, the change ring 180 is prevented from rotating in the first direction D1. That is, the rotation of the change ring 180 is locked, and the change ring 180 is held at 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 as shown in FIG. When the rotor 111 rotates in the first direction D1, one end 161 of the one-way spring 160 comes into contact with the spring pushing wall 155, and the other end 162 of the one-way spring 160 moves away from the spring pushing wall 156, whereby the coil portion 163 is wound. Twisted in the tightening direction. For this reason, the one-way spring 160 rotates together with the rotor 111 in the first direction D1, and the release arm 150 also rotates in the first direction D1.

  When the door 12 is further opened, as shown in FIG. 11, the convex portion 152 of the release arm 150 comes into contact with the first arm 221 from the first direction D1, so that the first arm 221 rotates in the arrow M2 direction. Move. On the other hand, the second arm 222 does not rotate and is kept engaged with the rotation stopper 184a.

  When the door 12 further moves in the opening direction, as shown in FIG. 12, the convex portion 152 of the release arm 150 passes through the first arm 221, so that the first arm 221 rotates in the direction of the arrow M1 due to the elasticity of the spring 225. Move to return to the original position. Further, when the other end 162 of the one-way spring 160 abuts against the spring stopper 103 of the base member 100, the one-way spring 160 is twisted in the rewinding direction. Therefore, the friction between the rotor 111 and the one-way spring 160 is eliminated, and only the rotor 111 rotates in the first direction D1 while the release arm 150 and the one-way spring 160 are held at predetermined positions.

  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. 8, the door 12 is stopped in the middle of the opening direction.
[Step S3]
In step S3 of FIG. 8, the door 12 is slightly moved in the closing direction.
[Step S4]
When the door 12 is slightly moved in the closing direction, as shown in FIG. 13, the rotor 111 rotates in the second direction (door closing direction) D <b> 2, so that the convex portion 152 of the release arm 150 is moved to the first arm 221. By abutting from the direction D2, the first arm 221 and the second arm 222 rotate in the arrow M1 direction. For this reason, the second arm 222 is detached from the rotation stopper 184a. As a result, the change ring 180 can rotate in the first direction D1.

[Step S5]
At the moment when the second arm 222 is detached from the rotation stopper 184a, the change ring 180 is rotated in the first direction D1 by the elasticity of the return spring 190. At this time, the movable arm portion 123 of the clutch spring 120 also pushes the spring support portion 181 in the first direction D1. For this reason, the change ring 180 can be easily rotated in the first direction D1.

[Step S6]
As shown in FIG. 14, when the change ring 180 rotates a predetermined angle in the first direction D1, the contact portion 182 of the change ring 180 contacts the damper 200, so that the rotation of the change ring 180 stops and braking is performed. The mechanism 47 switches 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.

  Under the braking mode, when a large force is applied to the door 12 in the opening direction, the rotor 111 rotates in the tightening direction of the clutch spring 120 (first direction D1), so that the clutch spring 120 is stronger against the rotor 111. Wrap. 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.

  Thus, when the door 12 is opened, the door 12 is temporarily stopped in front of 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. Can do. 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.

  Since a release spring 130 (shown in FIGS. 4 and 5) is provided between the fixed member 110 and the base member 100, when torque in the first direction D <b> 1 is input to the fixed member 110 and the rotor 111. The stationary member 110 and the rotor 111 try to rotate in the first direction D1 against the elasticity of the release spring 130. As a result, the fixed side member 110 and the rotor 111 rotate in the first direction D1 while the release spring 130 is twisted. For this reason, the movable arm 123 of the clutch spring 120 moves in the first direction D1. That is, the movable arm 123 moves in the range of the angle θ (shown in FIG. 14) toward the spring support 181. When the torque in the first direction D1 increases, the movable arm portion 123 abuts against the spring support portion 181.

  For this reason, when the torque in the first direction (door opening direction) D1 applied to the rotor 111 exceeds a certain magnitude, the rotor 111 The outer peripheral surface 110a starts to slide in the circumferential direction. 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.

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. 14, 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. When the rotor 111 rotates in the second direction D2, the other end 162 of the one-way spring 160 comes into contact with the spring pushing wall 156, and the one end 161 of the one-way spring 160 moves away from the spring pushing wall 155, whereby the coil portion 163 is wound. Twisted in the tightening direction. For this reason, the one-way spring 160 rotates integrally with the rotor 111 in the second direction D2, and the release arm 150 also rotates in the second direction D2.

  Therefore, when the door 12 moves in the closing direction, as shown in FIG. 15, the convex portion 152 of the release arm 150 comes into contact with the arm receiving portion 183 of the change ring 180, and the change ring 180 is moved together with the release arm 150. Rotate in the second direction D2.

[Step S9]
FIG. 16 shows a state immediately before the braking mechanism 47 is switched 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.

  When the rotor 111 further rotates in the second direction D <b> 2, the guide surface 184 b of the protrusion 184 provided on the outer periphery of the change ring 180 contacts the second arm 222. At the moment when the tip of the second arm 222 slides on the guide surface 184b and the tip of the second arm 222 passes through the guide surface 184b and reaches the rotation stopper 184a, the first arm 221 and the second arm 222 are moved to the arrow M2. Rotate in the direction. As a result, the second arm 222 engages with the rotation stopper 184a. At the same time, the tip of the first arm 221 hits one end 161 of the one-way spring 160 in the rewind direction of the one-way spring 160. Thereby, the coil part 163 of the one-way spring 160 is forcibly expanded, and the friction between the one-way spring 160 and the rotor 111 is released.

  In this way, it is possible to switch to the release mode. In this release mode, the diameter of the coil portion 121 of the clutch spring 120 is slightly expanded, and the friction between the coil portion 163 of the one-way spring 160 and the rotor 111 is substantially eliminated, so that the rotor 111 is made small. It is possible to rotate in the second direction D2 by 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, after the door 12 is stopped in the middle of the opening direction, when the door 12 is slightly moved in the closing direction, the braking mechanism 47 automatically switches to the braking mode. Change. In addition, the braking mechanism 47 can be switched from the release mode to the braking mode by using a force for manually moving the door 12.

  Further, when the door 12 is largely moved toward the fully closed position, the brake mechanism 47 is switched from the brake mode to the release mode as the door 12 is closed. That is, when the door 12 is moved to the fully closed position, the braking mechanism 47 can be switched to the release mode by using a 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.

  Thus, according to the door position regulating apparatus 40 of the present embodiment, the mode (braking mode and release mode) of the braking mechanism 47 can be switched without using an electric actuator. Therefore, an actuator is unnecessary, and circuit components such as a control circuit and a switch, and a harness for wiring are also unnecessary. Therefore, the structure of the door position regulating device 40 can be simplified and the 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. FIG. 4 is an exploded perspective view of a rotating arm member of the braking mechanism shown in FIG. 3. 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 of a state where a rotor of the braking mechanism shown in FIG. 3 is further rotated in a first direction. FIG. 4 is a perspective view showing a state where a release arm of the braking mechanism shown in FIG. 3 is stopped. FIG. 4 is a perspective view when a rotor and a release arm of the braking mechanism shown in FIG. 3 are slightly rotated in a second direction. FIG. 4 is a perspective view showing a state in which the braking mechanism shown in FIG. 3 is switched to a braking mode. The perspective view which shows the state which the rotor of the braking mechanism shown by FIG. 3 rotated further in the 2nd direction. FIG. 4 is a perspective view showing a state immediately before the braking mechanism shown in FIG. 3 is switched 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 180 ... Change ring 181 ... Spring support part 182 ... Contact part 183 ... Arm receiving part 184a ... Anti-rotation part 190 ... Return spring 220 ... Rotating arm member 221 ... First arm 222 ... 2nd arm

Claims (5)

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 provided so as to be rotatable in the first direction and the second direction. In a state where the base member is rotated in the first direction, the base member is separated from the movable arm portion of the clutch spring, and the second member A change ring provided with a spring support that pushes the clutch spring in the rewinding direction by contacting the movable arm in a state rotated in the direction of
Biasing means for biasing the change ring in the first direction;
Detent means for preventing the change ring from rotating in the first direction when the change ring is rotated in the second direction against the elasticity of the biasing means;
When the rotor is rotatably provided in the first and second directions, and stops at a predetermined position when the rotor rotates in the first direction, and when the rotor rotates in the second direction The detent means is actuated by rotating in the second direction together with the rotor to rotate the change ring in the first direction, and the change ring in a state where the rotor further rotates in the second direction. A release arm that rotates the change ring in the second direction by contacting the arm receiving portion of
A door position restricting device comprising:   The detent means engages with a first arm driven by the release arm when the release arm rotates in the first and second directions, and a rotation stop provided in the change ring. And the second arm for preventing the change ring from rotating in the first direction, and the release arm rotates only the first arm when the release arm rotates in the first direction. As a result, the state in which the second arm is engaged with the rotation stopper is maintained, and the release arm rotates the first arm and the second arm simultaneously when the release arm rotates in the second direction. The door position restricting device according to claim 1, wherein the second arm is disengaged from the rotation stopper by being moved. 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 includes a coil portion wound in close contact with a cylindrical portion of the rotor, and the rotor is in the first direction. The one end of the one-way spring comes into contact with one spring pushing wall of the release arm and the coil portion is twisted in the tightening direction so that the release arm rotates in the first direction, When the rotor rotates in the second direction, the other end of the one-way spring comes into contact with the other spring pushing wall of the release arm and the coil portion is twisted in the winding direction so that the release arm is The door position restricting device according to claim 1, wherein the door position restricting device rotates in a second direction.

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