Door device for vehicle

Abstract

To support a door stably.SOLUTION: A door device 20 includes: an engagement member 180 provided at a variable link 100 including a connection length variable mechanism 50; a cam member 160 provided at a door 5 having a cam groove 170 with which the engagement member 180 is engaged. Furthermore, an extension end part 172e of the cam groove 170 in which an engagement part 180x of the engagement member 180 which has moved in the cam groove 170 based on the full-opening operation of the door 5 is in proximity is made to be an opening side end part 170b of the cam groove 170. Then, the cam groove 170 includes a groove width change section α set on the opening side of the extension region including the opening side end part 170b, and groove width W1 of the cam groove 170 in the groove width change section α is narrower than groove width W0 on the closing side of the extension region than the groove width change section α.SELECTED DRAWING: Figure 24

Description

[Technical Field]

[0001] The present invention relates to a vehicle door device. [Background technology]

[0002] Conventionally, there is a vehicle door device that includes first and second link arms having a first pivot connection point relative to the vehicle body and a second pivot connection point relative to the vehicle door. In such a vehicle door device, a door provided in the door opening opens and closes based on the operation of a link mechanism formed by the first and second link arms. Furthermore, for example, Patent Document 1 describes a configuration in which one link arm is a variable link and includes a connection length variable mechanism that can change the connection length between the first and second pivot connection points. By adopting such a configuration, it is possible to increase the degree of freedom in the opening and closing operation of the door that opens and closes based on the operation of the link mechanism. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-68618 Summary of the Invention [Problem to be solved by the invention]

[0004] In a vehicle door device having the above-described configuration, there is a demand for further suppression of swinging and vibration of the door supported by the link mechanism. [Means for solving the problem]

[0005] The vehicle door device of the present invention comprises first and second link arms having a first pivot connection point relative to the vehicle body and a second pivot connection point relative to the vehicle door, and the door opens and closes based on the operation of a link mechanism formed by the first and second link arms, and at least one of the first and second link arms is a variable link equipped with a connection length changing mechanism that can change the connection length between the first and second pivot connection points, and comprises an engaging member provided on the variable link and a cam member provided on the door having a cam groove with which the engaging member engages, and the extended end of the cam groove to which the engaging portion of the engaging member moves within the cam groove based on the full-open operation of the door is adjacent is set as the open end of the cam groove, and the cam groove has a groove width changing section set on the open side of the extended area including the open end, and the groove width of the cam groove in the groove width changing section is narrower than the groove width of the cam groove on the closed side of the extended area than in the groove width changing section.

[0006] According to the above configuration, it is possible to more effectively suppress the swaying and vibration of a door supported by a link mechanism configured using a variable link having a variable connection length mechanism. [Effects of the Invention]

[0007] According to the present invention, the door can be stably supported. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a door device. [Figure 2] FIG. 2 is a perspective view of the door device. [Figure 3] FIG. 3 is a plan view of the first and second link arms that constitute the link mechanism. [Figure 4] FIG. 4 is a plan view of the first and second link arms that constitute the link mechanism. [Figure 5] FIG. 5 is a plan view of the first and second link arms that constitute the link mechanism. [Figure 6]FIG. 6 is a plan view of the first and second link arms that constitute the link mechanism. [Figure 7] FIG. 7 is a schematic diagram of the door-side engaging portion and the vehicle-body-side engaging portion. [Figure 8] FIG. 8 is a perspective view of the door-side engaging portion, the vehicle-body-side engaging portion, the door, and the door opening. [Figure 9] FIG. 9 is a system configuration diagram of the door device. [Figure 10] FIG. 10 is a perspective view of the vicinity of the door opening where the door device is provided. [Figure 11] FIG. 11 is a plan view of an articulation link. [Figure 12] FIG. 12 is a plan view of an articulation link. [Figure 13] FIG. 13 is a plan view of a variable link using articulated links. [Figure 14] FIG. 14 is a diagram illustrating the operation of a flexible link using an articulated link. [Figure 15] FIG. 15 is an exploded perspective view of a variable link using an articulated link. [Figure 16] FIG. 16 is a side view of the vehicle body side link and the body bracket that constitute the joint link. [Figure 17] FIG. 17 is a cross-sectional view of the vehicle body side link and the vehicle body bracket. [Figure 18] FIG. 18 is a side view of the door bracket and articulation link. [Figure 19] FIG. 19 is a side view of the door bracket and articulation link. [Figure 20] FIG. 20 is a side view of the door bracket and articulation link. [Figure 21] FIG. 21 is a plan view of an articulation link connected to a door via a door bracket. [Figure 22] FIG. 22 is a plan view of an articulation link connected to a door via a door bracket. [Figure 23] FIG. 23 is a plan view of an articulation link connected to a door via a door bracket. [Figure 24]FIG. 24 is a partial cross-sectional view of a door bracket showing a cam groove of a cam member with which an engaging member provided on a variable link engages. [Figure 25] FIG. 25 is a perspective view of the vicinity of a door stopper provided on the door bracket on the second link arm side. [Figure 26] FIG. 26 is a plan view of the vicinity of the door stopper provided on the door bracket on the first link arm side. [Figure 27] FIG. 27 is a perspective view of the vicinity of a door stopper provided on the door bracket on the first link arm side. [Figure 28] FIG. 28 is a perspective view of the vicinity of the door-side fitting portion that constitutes the down stopper. [Figure 29] FIG. 29 is a perspective view of the vicinity of the vehicle body side fitting portion that constitutes the down stopper. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of a vehicle door device will be described with reference to the drawings. <Link mechanism> 1 and 2, a vehicle 1 of this embodiment has a door opening 3 provided in a side surface 2s of a vehicle body 2. A first link arm 11 and a second link arm 12 that support a door 5 of the vehicle 1 at the door opening 3 are provided in the door opening 3.

[0010] More specifically, in the vehicle 1 of this embodiment, the first and second link arms 11, 12 each have a first rotation connection point X1 with respect to the vehicle body 2 and a second rotation connection point X2 with respect to the door 5. Specifically, the first link arm 11 is connected to the vehicle body 2 while being journaled on a spindle N1a extending in the vertical direction (vertical direction in each drawing), and is connected to the door 5 while being journaled on a spindle N1b extending in the vertical direction. The second link arm 12 is also connected to the vehicle body 2 while being journaled on a spindle N2a extending in the vertical direction, and is connected to the door 5 while being journaled on a spindle N2b extending in the vertical direction.

[0011] 3 to 6, in the vehicle 1 of this embodiment, the first and second link arms 11, 12 form a link mechanism 15 configured as a four-bar link. The vehicle 1 of this embodiment is configured so that the door 5 supported in the door opening 3 opens and closes based on the operation of the link mechanism 15.

[0012] 1 and 2, the vehicle 1 of this embodiment uses these first and second link arms 11, 12 to support the door 5 at the door opening 3 on the rear side of the vehicle (left side in FIG. 1, right side in FIG. 2). In the vehicle 1 of this embodiment, these first and second link arms 11, 12 each have a first pivot connection point X1 that is pivotally connected to the vehicle body 2 near a rear edge 3r of the door opening 3. In the vehicle 1 of this embodiment, these first and second link arms 11, 12 are arranged spaced apart in the vertical direction.

[0013] In the vehicle 1 of this embodiment, the first link arm 11 is provided higher than the second link arm 12. The first link arm 11 has a second rotation connection point X2 that is rotatably connected to the door 5 at approximately the center of the door 5 in the front-to-rear direction. On the other hand, the second link arm 12 has a second rotation connection point X2 that is connected to the door 5 near the front end 5f of the door 5. As a result, in the vehicle 1 of this embodiment, a door device 20 is formed in which the door 5 opens and closes based on the operation of the link mechanism 15 formed by the first and second link arms 11, 12.

[0014] <Operation of the link mechanism> 3 to 6, in the door device 20 of this embodiment, the first and second link arms 11 and 12 each rotate counterclockwise in the drawings about the first rotation connection point X1 during the opening operation of the door 5. As a result, the door 5 of the vehicle 1 supported by the first and second link arms 11 and 12 opens toward the rear of the vehicle (to the left in the drawings).

[0015] In the door device 20 of this embodiment, when the door 5 is closed, the first and second link arms 11 and 12 each rotate clockwise in the drawings around the first rotation connection point X1, thereby causing the door 5 of the vehicle 1 supported by the first and second link arms 11 and 12 to close toward the front of the vehicle (to the right in the drawings).

[0016] Furthermore, in the door apparatus 20 of this embodiment, the opening / closing movement locus R of the door 5 is defined so as to describe an arc-shaped glide locus Rg based on the movement of the link mechanism 15 formed by the first and second link arms 11 and 12. That is, as shown in Fig. 5, at an intermediate position where the first and second link arms 11 and 12 extend in the vehicle width direction (the up-down direction in Figs. 3 to 6), the movement component in the vehicle front-rear direction becomes large. As shown in Figs. 3 and 4, the opening / closing movement position of the door 5 approaches the fully closed position P0, where the first and second link arms 11 and 12 extend in the vehicle front-rear direction (the left-right direction in Figs. 3 to 6), and thus the movement component in the vehicle width direction becomes large.

[0017] In the door device 20 of this embodiment, the first link arm 11 has the second pivot connection point X2 with respect to the door 5 at a position closer to the center of gravity G than the second link arm 12. That is, in the door device 20 of this embodiment, the first link arm 11 is therefore positioned as the main link 21 that supports a larger door load. The second link arm 12 is positioned as the sub-link 22 that receives a relatively small door load.

[0018] In the door device 20 of this embodiment, the first link arm 11 has a larger outer shape than the second link arm 12. As a result, the door device 20 of this embodiment is configured to impart high support rigidity to the first link arm 11 positioned on the main link 21.

[0019] <Door-side engagement portion and vehicle-body-side engagement portion> 3 to 7, the door device 20 of this embodiment includes a door-side engaging portion 31 provided at the front end 5f of the door 5 and a vehicle-body-side engaging portion 32 provided at the front edge 3f of the door opening 3. That is, in the vehicle 1 of this embodiment, the door-side engaging portion 31 is provided at a closing-side end 33 located on the closing operation side of the door 5, which opens and closes the door opening 3 of the vehicle 1 based on the operation of the link mechanism 15 formed by the first and second link arms 11 and 12. Furthermore, the vehicle-body-side engaging portion 32 is provided at a closing-side end 34 of the door opening 3 to which the closing-side end 33 of the door 5 moves toward or away from the door 5 based on the opening and closing operation of the door 5 moving in the fore-and-aft direction of the vehicle. The door device 20 of this embodiment is configured so that the door-side engaging portion 31 and the vehicle-body-side engaging portion 32 engage with each other when the door 5 is in the vicinity of the fully closed position P0.

[0020] More specifically, the door-side engaging portion 31 of this embodiment includes, as its guide engaging portion, a shaft-shaped engaging portion 41 extending in the vertical direction of the vehicle 1 (a direction perpendicular to the plane of the paper in FIG. 7). In the door device 20 of this embodiment, the shaft-shaped engaging portion 41 serving as the guide engaging portion is configured as a roller 41x rotatably supported around a support shaft (not shown) extending in the vertical direction. Furthermore, the vehicle-body-side engaging portion 32 includes a guide groove 42 having a pair of side walls 42a, 42b facing each other in the vehicle width direction (the vertical direction in FIG. 7) and extending in the opening and closing direction of the door 5. When the door device 20 of this embodiment is located near the fully closed position P0, the shaft-shaped engaging portion 41 constituting the guide engaging portion is disposed in the guide groove 42, and the door-side engaging portion 31 and the vehicle-body-side engaging portion 32 engage with each other.

[0021] That is, the shaft-shaped engaging portion 41 of the door-side engaging portion 31 is disposed in the guide groove 42 of the vehicle body-side engaging portion 32 while being sandwiched between a pair of side wall portions 42a, 42b facing each other in the vehicle width direction, thereby restricting displacement of the door 5 in the vehicle width direction. This enables the door device 20 of this embodiment to stably support the door 5 even near the fully closed position P0 where the first and second link arms 11, 12 forming the link mechanism 15 tend to be aligned.

[0022] 8 and 9, the door device 20 of this embodiment has door-side engaging portions 31, 31 provided at the front end portion 5f of the door 5 at two positions spaced apart in the vertical direction. Furthermore, the door device 20 has vehicle-body-side engaging portions 32, 32 provided at the front edge portion 3f of the door opening 3 at two positions similarly spaced apart in the vertical direction. The door device 20 of this embodiment is configured to hold the door 5 in the fully closed position P0 with the door-side engaging portions 31, 31 and the vehicle-body-side engaging portions 32, 32 engaged with each other.

[0023] Specifically, the door 5 supported by this link mechanism 15 is configured as a rear door. Furthermore, in the vehicle 1 of this embodiment, a door opening 3F at the front of the vehicle and a door opening 3R at the rear of the vehicle are separated by a B-pillar 44. In the door device 20 of this embodiment, the B-pillar 44 is provided with the vehicle body side engaging portions 32, 32.

[0024] <Locking device> 9, the door apparatus 20 of this embodiment is equipped with a locking device 45 that holds the door 5 in a fully closed state. Specifically, the door apparatus 20 is equipped with a rear lock 45R provided at the rear end 5r of the door 5 and a front lock 45F provided at the front end 5f of the door 5 as the locking devices 45. Furthermore, each of these locking devices 45 is equipped with a latch mechanism 47 that engages with a striker 46 provided on the vehicle body 2 when the door 5 moves to the fully closed position P0. Each locking device 45 restrains the door 5 in the fully closed position P0 based on the engaging force of each latch mechanism 47 and each striker 46.

[0025] That is, the front latch 47F constituting the latch mechanism 47 of the front lock 45F restrains the front end 5f of the door 5 on which the front latch 47F is provided, i.e., the closing side end 33 of the door 5, to the front edge 3f of the door opening 3, which corresponds to the closing side end 34 of the door opening 3. In the vehicle 1 of this embodiment, the striker 46 that engages with the front latch 47F is also provided on the B-pillar 44. Furthermore, the rear latch 47R constituting the latch mechanism 47 of the rear lock 45R restrains the rear end 5r of the door 5 on which the rear latch 47R is provided, i.e., the opening side end 48 of the door 5, to the rear edge 3r of the door opening 3, which corresponds to the opening side end 49 of the door opening 3. Thus, the door device 20 of this embodiment is configured to stably maintain the door 5, which has been moved to the fully closed position P0, in the fully closed state.

[0026] <Variable connection length mechanism> 3 to 6, in the door apparatus 20 of this embodiment, the second link arm 12 positioned as the sub-link 22 is provided with a variable connection length mechanism 50 that can change the connection length L between the first and second rotational connection points X1, X2. Furthermore, the variable connection length mechanism 50 is biased in a direction that shortens the length between the first and second rotational connection points X1, X2, that is, the connection length L of the door 5 by the second link arm 12 to which the variable connection length mechanism 50 is provided. Thus, the door apparatus 20 of this embodiment is configured so that the door 5 opens and closes with the connection length L by the second link arm 12 shortened.

[0027] 3, 4, and 7, in the door device 20 of this embodiment, the door 5 is allowed to open and close with the door-side engaging portion 31 and the vehicle-body-side engaging portion 32 engaged based on the operation of the variable coupling length mechanism 50 provided on the second link arm 12. Specifically, when the door 5 opens and closes with the door-side engaging portion 31 and the vehicle-body-side engaging portion 32 engaged, the shaft-shaped engaging portion 41 is relatively displaced along the extending direction of the guide groove 42 while the coupling length L is changed based on the operation of the variable coupling length mechanism 50. As a result, the opening and closing movement locus R of the door 5 changes in the door device 20 of this embodiment.

[0028] That is, in the door device 20 of this embodiment, when the door 5 moves to the fully closed position P0, the door-side engaging portion 31 engages with the vehicle-body-side engaging portion 32, and the opening and closing operation of the door 5 is guided with the shaft-shaped engaging portion 41 disposed within the guide groove 42. As a result, the door device 20 of this embodiment is configured so that the glide locus Rg based on the operation of the link mechanism 15 changes into a linear slide locus Rs along the opening width direction of the door opening 3.

[0029] In the case of the door opening 3 provided on the side surface 2s of the vehicle body 2, as in the vehicle 1 of this embodiment, the "opening width direction" is the front-rear direction of the vehicle. In this case, the "opening direction" of the door opening 3 that connects the interior of the vehicle (not shown) with the outside of the vehicle is the vehicle width direction.

[0030] Specifically, in the door apparatus 20 of this embodiment, when the door 5 is fully closed, an operating force in the closing direction is applied to the door 5 with the door-side engaging portion 31 and the vehicle-body-side engaging portion 32 engaged. In the door apparatus 20 of this embodiment, the operating force for opening or closing the door 5 is assumed to be a driving force of a drive device (described later) or a manual operation by a user. Furthermore, in this case, the operating force in the closing direction operates the variable connection length mechanism 50 provided on the second link arm 12, thereby extending the connection length L of the door 5 by the second link arm 12 based on the engagement state between the door-side engaging portion 31 and the vehicle-body-side engaging portion 32. Thus, the door apparatus 20 of this embodiment is configured such that the door 5 supported by the link mechanism 15 performs a closing operation toward the fully closed position P0 in a manner that describes the linear sliding path Rs as described above.

[0031] Furthermore, when the door 5 is opened from the fully closed position P0, an operating force in the opening direction is applied to the door 5 with the door-side engaging portion 31 and the vehicle-body-side engaging portion 32 engaged. Furthermore, in this case, the variable connection length mechanism 50 operates based on the operating force in the opening direction, thereby shortening the connection length L of the door 5 by the second link arm 12 based on the engagement state between the door-side engaging portion 31 and the vehicle-body-side engaging portion 32. Thus, the door device 20 of this embodiment is configured so that the door 5 supported by the link mechanism 15 performs an opening operation from the fully closed position P0 in a manner that also describes a linear sliding path Rs.

[0032] <Drive unit> As shown in Fig. 10, the door apparatus 20 of this embodiment includes a drive unit 51 that drives to open and close the door 5 of the vehicle 1 supported by the link mechanism 15 formed by the first and second link arms 11 and 12. In the door apparatus 20 of this embodiment, the drive unit 51 applies drive torque to the first link arm 11, which is positioned on the main link 21, using the first link arm 11 as a drive link 55. The drive unit 51 of this embodiment thereby rotates the first link arm 11 about a first rotation connection point X1 with respect to the vehicle body 2, thereby opening and closing the door 5 supported by the first link arm 11.

[0033] More specifically, in the door apparatus 20 of this embodiment, the first link arm 11 includes an arm body 60 having a long, generally rod-shaped external shape. The first link arm 11 of this embodiment also includes a base end bracket 61 and a tip end bracket 62 connected to longitudinal ends of the arm body 60. The door apparatus 20 of this embodiment also includes a vehicle body bracket 63 to which the base end bracket 61 of the first link arm 11 is rotatably connected while being fixed near the rear edge 3r of the door opening 3. The door apparatus 20 of this embodiment also includes a door bracket 64 to which the tip end bracket 62 of the first link arm 11 is rotatably connected while being fixed to the door 5.

[0034] That is, in the door device 20 of this embodiment, the base end bracket 61 and the vehicle body bracket 63, which are connected so as to be rotatable relative to each other, form a first rotation connection point X1 of the first link arm 11. Furthermore, the tip end bracket 62 and the door bracket 64, which are also connected so as to be rotatable relative to each other, form a second rotation connection point X2 of the first link arm 11. Thus, the drive unit 51 of this embodiment is configured to input its drive torque to the base end portion 11b of the first link arm 11, which is rotatably supported with respect to the vehicle body 2.

[0035] Specifically, in the door device 20 of this embodiment, the base end bracket 61 constituting the base end portion 11b of the first link arm 11 and the vehicle body bracket 63 are connected at two positions spaced apart in the vertical direction by using a pair of connecting pins 76, 76. As a result, the door device 20 of this embodiment is configured so that the rotation axis 11x of the first link arm 11 relative to the vehicle body 2, that is, the first rotation connection point X1, is formed at a position passing through the axes of the connecting pins 76, 76.

[0036] More specifically, the drive unit 51 of this embodiment includes an actuator 65 that outputs a drive torque, and a torque input unit 80 that inputs the drive torque of the actuator 65 to a base end bracket 61 that constitutes the base end 11b of the first link arm 11. Furthermore, in the door apparatus 20 of this embodiment, the drive unit 51 is provided at an axial position between the pair of connecting pins 76, 76, while being supported by a vehicle body bracket 63. Thus, the door apparatus 20 of this embodiment is configured to rotationally drive the first link arm 11 at a position coaxial with the rotation axis 11x of the first link arm 11 that forms the first rotation connection point X1 with respect to the vehicle body 2.

[0037] <System configuration> 3 to 6 and 9, in the door device 20 of this embodiment, the operation of the drive device 51 configured as described above is controlled by a control device 90. Specifically, the control device 90 of this embodiment supplies drive power to the actuator 65 of the drive device 51, more specifically, to the motor 65m that serves as the drive source thereof. The control device 90 of this embodiment controls the operation of the drive device 51 based on the rotation of the motor 65m through the supply of drive power to the motor 65m. In other words, the control device 90 is configured to control the opening and closing operation of the door 5 supported by the link mechanism 15 formed by the first link arm 11 and the second link arm 12 that serve as the drive link 55.

[0038] More specifically, a user's operation input to an operation input unit 91 provided on a door 5 of the vehicle 1, in the vehicle interior, or on a portable device or the like is input as an operation input signal S1 to the control device 90 of this embodiment. Specifically, in the vehicle 1 of this embodiment, a door switch 93 is provided near the rear of the window frame of the door 5 on which the door device 20 is provided as the operation input unit 91. Note that this door switch 93 is sometimes referred to as a "C-pillar switch," etc. Furthermore, a capacitance sensor 94 capable of contactlessly detecting a user's operation input is provided near the front of the window frame. The control device 90 of this embodiment detects a user's request to operate the door 5 based on the operation input signal S1 output by the operation input unit 91.

[0039] Furthermore, various control signals S2 indicating the operation state of the door 5 and the vehicle state are input to the control device 90 of this embodiment. For example, the opening / closing operation position and speed of the door 5 are input to the control device 90 of this embodiment as the control signals S2. The control device 90 of this embodiment controls the opening / closing operation of the door 5 based on the driving force of the drive device 51 based on these control signals S2 in addition to the operation input signal S1.

[0040] In the vehicle 1 of this embodiment, a touch sensor 95 is provided at the front end 5f of the door 5 to detect the occurrence of pinching when the door 5 is closing. The touch sensor 95 may be a contact-type or capacitance-type pressure-sensitive sensor, or a non-contact sensor. When the control device 90 of this embodiment detects the occurrence of pinching based on the output signal of the touch sensor 95, the control device 90 executes control to eliminate the pinching, such as by driving the door 5 in the reverse direction during the closing operation.

[0041] In the vehicle 1 of this embodiment, the operation input signals S1 output by each of the operation input units 91 and the control signals S2 output by the various sensor devices 96 are input to the control device 90 via an in-vehicle network 97 such as a CAN (Control Area Network). Alternatively, a LAN (Local Area Network) or the like can be used as the in-vehicle network 97. The in-vehicle network 97 can be configured using a wired system using a signal line or wireless communication.

[0042] In addition, in the vehicle 1 of this embodiment, the control device 90 controls the operation of a closer device 98 provided in the door 5. That is, the closer device 98 has a closing function that drives the latch mechanism 47 of each locking device 45 to transition to a fully latched state when the latch mechanism 47 is in a half-latched state. The closer device 98 also has a release function that drives the latch mechanism 47 to transition to an unlatched state. The control device 90 of this embodiment controls the engaged and disengaged states of the latch mechanisms 47 constituting each locking device 45 through the operation of the closer device 98, that is, it restrains the door 5 at the fully closed position P0 and releases the restraint.

[0043] Specifically, the closer device 98 of this embodiment is provided integrally with the rear lock 45R. Furthermore, in the door device 20 of this embodiment, the driving force of this closer device 98 is transmitted to the front lock 45F via a drive cable (not shown). This allows the control device 90 of this embodiment to control the operation of the rear lock 45R and the front lock 45F while the rear latch 47R and the front latch 47F are interlocked.

[0044] The type and location of the closer device 98 can be changed as desired. For example, the closer device 98 can be configured to be integrated with the front lock 45F. Alternatively, an independent closer device 98 can be provided for each of the locking devices 45. Furthermore, the closer device 98 can be located away from each of the locking devices 45. A release device for releasing each of the locking devices 45 can be provided separately from the closer device 98 for closing each of the locking devices 45.

[0045] That is, the control device 90 of this embodiment controls the operation of the closer device 98 together with the drive device 51 based on the input of an operation input signal S1 indicating an operation request from a user. For example, the control device 90 executes release control of each lock device 45 by operation of the closer device 98 prior to controlling the opening drive of the door 5 by operation of the drive device 51. Furthermore, after controlling the closing drive of the door 5 by operation of the drive device 51, the control device 90 subsequently executes close control of each lock device 45 by operation of the closer device 98. Thus, the door device 20 of this embodiment is configured so that the opening operation of the door 5 supported by the link mechanism 15 formed by the first and second link arms 11, 12 from a fully closed state and the closing operation of the door 5 to the fully closed state can be smoothly performed.

[0046] In addition, in the vehicle 1 of this embodiment, the door 5 is provided with an emergency release lever 99. Furthermore, this emergency release lever 99 is connected to each locking device 45 via a drive cable (not shown). Thus, in the vehicle 1 of this embodiment, in the event of an emergency such as a power loss, for example, the emergency release lever 99 can be operated to release the restraint of the door 5 by each locking device 45.

[0047] <Joint link> As described above, in the door device 20 of this embodiment, the second link arm 12 positioned on the sub-link 22 constitutes the variable link 100 equipped with the variable connection length mechanism 50 that enables the connection length L between the first and second rotation connection points X1, X2 to be changed.

[0048] 11 and 12, in the door device 20 of this embodiment, the second link arm 12 is configured to include a vehicle body-side link 101 and a door-side link 102 that are connected to each other so as to be able to rotate relative to each other. That is, the vehicle body-side link 101 configures the base end 12b side of the second link arm 12 that has a first rotation connection point X1 with respect to the vehicle body 2. The door-side link 102 configures the tip end 12a side of the second link arm 12 that has a second rotation connection point X2 with respect to the door 5 of the vehicle 1. In the door device 20 of this embodiment, the connection length variable mechanism 50 is formed based on the bent shape of the joint link 110 formed thereby.

[0049] More specifically, the door-side link 102 of this embodiment has a so-called mini-arm configuration with a shorter axial length than the vehicle-body-side link 101. The vehicle-body-side link 101 has a vehicle-body-side coupling portion 111 for the vehicle body 2 at one end in the longitudinal direction. The door-side link 102 also has a door-side coupling portion 112 for the door 5 at one end in the longitudinal direction. The vehicle-body-side link 101 and the door-side link 102 each have intermediate coupling portions 113, 114 at the other end in the longitudinal direction, which couple them to each other.

[0050] That is, in the door device 20 of this embodiment, these intermediate connectors 113, 114 form an intermediate connector point X3 of the joint link 110 provided on the second link arm 12. In addition, the second link arm 12 forms a triangle with the vehicle body side link 101 and the door side link 102, with the intermediate connector point X3 as the apex. As a result, when the vehicle body side link 101 and the door side link 102 rotate relative to each other, the length of the straight line connecting the first and second rotation connector points X1, X2, which forms the base of the triangle, i.e., the connection length L, changes.

[0051] Specifically, in the joint link 110 of this embodiment, the door-side link 102 rotates counterclockwise in each drawing relative to the vehicle-body-side link 101 about the intermediate connection point X3, thereby increasing the connection length L. On the other hand, the door-side link 102 rotates clockwise in each drawing relative to the vehicle-body-side link 101 about the intermediate connection point X3, thereby decreasing the connection length L.

[0052] <Joint link connection structure> 13 to 15, in the door device 20 of this embodiment, the vehicle body side link 101 constituting the base end portion 12b of the second link arm 12 is connected to the vehicle body 2 via a vehicle body bracket 121. The door side link 102 constituting the tip end portion 12a of the second link arm 12 is also connected to the door 5 via a door bracket 122 fixed to the inner surface 5s of the door 5.

[0053] 15 to 17, in the door device 20 of this embodiment, the vehicle body side link 101 has an outer shape of a long, substantially rectangular tube on the side of the vehicle body side connecting portion 111. The vehicle body bracket 121 has an upper wall 121a and a lower wall 121b that face each other in the vertical direction when the vehicle body bracket 121 is fixed to the vehicle body 2. The vehicle body bracket 121 also has a pair of upper and lower through holes 123, 123 formed in the upper wall 121a and the lower wall 121b. The vehicle body bracket 121 of this embodiment has a support shaft 125 for the vehicle body bracket 121 that is inserted through the through holes 123, 123 and spans between the upper wall 121a and the lower wall 121b.

[0054] 17 , in the door device 20 of this embodiment, a pair of collars 127, 127 having a generally flat cylindrical shape are attached to a through-hole provided in the vehicle-body-side connecting portion 111 of the vehicle-body-side link 101. Furthermore, a support shaft 125 is inserted into the cylindrical interior of each of the collars 127, 127 via bushings 126, 126. In this way, the door device 20 of this embodiment stably supports the vehicle-body-side link 101 around the support shaft 125 by increasing the contact area of ​​each bushing 126, 126. In other words, the vehicle-body-side link 101 and the vehicle-body bracket 121 are configured to form a first rotation connection point X1 with respect to the vehicle body 2.

[0055] 15 and 18 to 23, in the door device 20 of this embodiment, the door-side link 102 has an upper wall portion 102a and a lower wall portion 102b that face each other in the up-down direction. Furthermore, the door-side link 102 has a generally U-shaped bent plate shape with an end wall portion 102c that connects the upper wall portion 102a and the lower wall 102b at one longitudinal end side. As a result, the door-side link 102 of this embodiment has an open end 102x at the longitudinal end opposite the end wall portion 102c, and the vicinity of this open end 102x is configured to be rotatably connected to the door bracket 122.

[0056] More specifically, the door bracket 122 of this embodiment has an upper wall 122a and a lower wall 122b that face each other in the vertical direction when the door bracket 122 is fixed to the inner surface 5s of the door 5. Furthermore, the door-side link 102 of this embodiment has an upper wall portion 102a near the opening end 102x connected to the upper wall 122a of the door bracket 122, and has a lower wall 102b near the opening end 102x connected to the lower wall 122b of the door bracket 122. As a result, the door device 20 of this embodiment is configured so that the opening end 102x of the door-side link 102 serves as the door-side connecting portion 112, and the door-side link 102 and the door bracket 122 form a second rotation connecting point X2 with respect to the door 5.

[0057] Specifically, the door device 20 of this embodiment includes an upper connecting member 128a that rotatably connects the upper wall portion 102a of the door-side link 102 to the upper wall 122a of the door bracket 122. The door device 20 also includes a lower connecting member 128b that rotatably connects the lower wall 102b of the door-side link 102 to the lower wall 122b of the door bracket 122. As a result, the door device 20 of this embodiment is configured such that a second rotation connection point X2 with respect to the door 5 is formed coaxially with the upper connecting member 128a and the lower connecting member 128b.

[0058] The door-side link 102 of this embodiment is provided with a connecting shaft 129 that spans the upper wall 122a and the lower wall 122b at a longitudinally intermediate position of the door-side link 102. Furthermore, in the door device 20 of this embodiment, the intermediate connecting portion 113 of the vehicle-body-side link 101 is rotatably connected to the connecting shaft 129. As a result, the door device 20 of this embodiment is configured so that the longitudinally intermediate position where the connecting shaft 129 is provided serves as the intermediate connecting portion 114 of the door-side link 102, and an intermediate connecting point X3 between the door-side link 102 and the vehicle-body-side link 101 is formed.

[0059] More specifically, when the door bracket 122 of this embodiment is fixed to the door 5, a first end 131 in the longitudinal direction thereof is disposed on the front side of the vehicle (right side in FIGS. 18, 20 to 23), and a second end 132 is disposed on the rear side of the vehicle (left side in each of the figures). In other words, the door bracket 122 of this embodiment is configured so that the first end 131 in the longitudinal direction is disposed at a position on the closing side in the opening width direction of the door opening 3, and the second end 132 is disposed at a position on the opening side in the opening width direction of the door opening 3.

[0060] The door bracket 122 of this embodiment has a generally U-shaped cross section and a vertical wall 122c connecting the upper wall 122a and the lower wall 122b. The door bracket 122 of this embodiment also has a connection position of the door-side link 102 to the door bracket 122, i.e., a second rotation connection point X2 with the door 5, at a position spaced from the vertical wall 122c. In the door device 20 of this embodiment, when the door-side link 102 rotates around the second rotation connection point X2, the intermediate connection portion 114 with the vehicle-body-side link 101 is positioned closer to the vertical wall 122c of the door bracket 122 than the door-side connection portion 112. In other words, the intermediate connection point X3 with the vehicle body side link 101 is positioned closer to the inner surface 5s of the door 5 than the second rotation connection point X2 with respect to the door 5, and the door side link 102 is configured to rotate around the second rotation connection point X2.

[0061] <Door-side link energizing structure> The door device 20 of this embodiment also includes a biasing member 140 that biases the door-side link 102 to rotate around a second rotation connection point X2 with respect to the door 5 formed by the door bracket 122. Furthermore, in the door device 20 of this embodiment, the door-side link 102 rotates clockwise in FIGS. 21 to 23 based on the biasing force of the biasing member 140. The door device 20 of this embodiment is configured so that the rotation of the door-side link 102 biased by the biasing member 140 shortens the connection length L of the joint link 110 formed by the door-side link 102.

[0062] 14 and 21, in the door device 20 of this embodiment, the joint link 110 constituting the second link arm 12 is in a state in which its connection length L is extended when the door 5 supported by the link mechanism 15 is in the fully closed position P0 (see FIG. 12). Furthermore, at this time, the door-side link 102, whose door-side connecting portion 112 is rotatably supported around the second rotational connection point X2 formed by the door bracket 122, is rotated counterclockwise in FIG. 21 against the biasing force of the biasing member 140. In this state, in the door device 20 of this embodiment, the intermediate connection point X3 formed by the intermediate connection portion 114 of the door-side link 102 and the vehicle-body-side link 101 is located closer to the second end 132 in the longitudinal direction of the door bracket 122 than the second rotational connection point X2.

[0063] 21 and 22, in the door device 20 of this embodiment, when the door 5 performs an opening operation from the fully closed position P0, the joint link 110 constituting the second link arm 12 is allowed to change in a direction that shortens its connection length L. Then, in the door device 20 of this embodiment, the door-side link 102 thereby rotates clockwise in FIGS. 21 to 23 around the second rotation connection point X2 formed by the door bracket 122 based on the biasing force of the biasing member 140.

[0064] Furthermore, as the door-side link 102 of this embodiment rotates about the second rotational connection point X2, the intermediate connection portion 114, which forms the intermediate connection point X3 with the vehicle-body-side link 101, moves in the longitudinal direction of the door bracket 122, toward the first end 131. As a result, in the door device 20 of this embodiment, the door-side link 102 rotates relative to the vehicle-body-side link 101 around the intermediate connection point X3 in the clockwise direction in each drawing. In other words, the connection length L is shortened.

[0065] 18 to 23, in the door device 20 of this embodiment, a tension coil spring 145 is used in the biasing member 140 of the door-side link 102. Specifically, one end of this tension coil spring 145 is locked to a locking portion 146 provided on the first end 131 of the door bracket 122. The other end of this tension coil spring 145 is locked to a connecting shaft 129 provided on the door-side link 102 and connecting to the vehicle-body-side link 101. That is, in the door device 20 of this embodiment, the tension coil spring 145 generates a tensile force that pulls the connecting shaft 129, which forms the intermediate connection point X3 with the vehicle-body-side link 101, in the longitudinal direction of the door bracket 122, toward the first end 131. The door device 20 of this embodiment is configured to bias the door-side link 102 to rotate clockwise in Figures 21 to 23 around the second rotation connection point X2 with respect to the door 5 formed by the door bracket 122 based on the tensile force of the tension coil spring 145.

[0066] <Rotation restriction part> 18, 19, 22, and 23, in the door device 20 of this embodiment, the door bracket 122 is provided with a stopper portion 148 that comes into contact with the door-side link 102 that has rotated about the second rotation connection point X2 during the opening operation of the door 5. Furthermore, in the door device 20 of this embodiment, the stopper portion 148 is provided with a buffer member 149 having a substantially flat plate-like outer shape. The door device 20 of this embodiment is configured such that the stopper portion 148 serves as a rotation restriction portion 150 that restricts the relative rotation of the door-side link 102 with respect to the door 5 about the second rotation connection point X2.

[0067] More specifically, the door bracket 122 of this embodiment has a notch 151 provided in its vertical wall 122c. Furthermore, the door bracket 122 supports the open end 102x of the door-side link 102 that constitutes the door-side connecting portion 112, with the end wall 102c of the door-side link 102 disposed within this notch 151. The door bracket 122 of this embodiment is configured so that a stopper portion 148, which serves as the rotation restricting portion 150, is disposed on a peripheral edge 151a of the notch 151 located on the first end 131 side in the longitudinal direction of the door bracket 122.

[0068] That is, the end wall portion 102c of the door-side link 102 is disposed at a position farther away from the opening end 102x, which is supported by the door bracket 122 and forms the second pivot connection point X2, than the connecting shaft 129, which forms the intermediate connection point X3 with the vehicle-body link 101. Therefore, when the door-side link 102 rotates around the second pivot connection point X2 based on the tensile force of the tension coil spring 145, the end wall portion 102c also moves longitudinally within the notch portion 151 of the door bracket 122 toward the first end portion 131. In the door device 20 of this embodiment, this causes the end wall portion 102c of the door-side link 102 to abut against a stopper portion 148 provided on a peripheral edge portion 151a of the notch portion 151.

[0069] Furthermore, in this state, in the door device 20 of this embodiment, the end wall portion 102c of the door-side link 102 is pressed against the stopper portion 148 based on the biasing force of the tension coil spring 145. As a result, the door device 20 of this embodiment is configured to restrict the relative rotation of the door-side link 102 with respect to the door 5 around the second rotation connection point X2.

[0070] In the door device 20 of this embodiment, the door bracket 122 is disposed at a position where the notch 151 provided in the vertical wall 122c faces the recess provided in the inner surface 5s of the door 5. This prevents the end wall 102c side of the door-side link 102 moving within the notch 151 from interfering with the inner surface 5s of the door 5.

[0071] Furthermore, the door device 20 of this embodiment allows elastic deformation of the buffer member 149 provided on the stopper portion 148 when the end wall portion 102c of the door-side link 102 abuts against the stopper portion 148. This in turn makes it possible for the door device 20 of this embodiment to suppress the generation of abutment noise against the stopper portion 148, and also to stably hold the door-side link 102 pressed against the stopper portion 148.

[0072] 22, in the door device 20 of this embodiment, the rotation of the door-side link 102 about the second rotation connection point X2 is restricted, and this changes the manner in which the connection length L is changed based on the operation of the joint link 110 that constitutes the connection length variable mechanism 50. That is, the door-side link 102 is pressed against the stopper portion 148 of the door bracket 122 based on the biasing force of the biasing member 140, and the door-side link 102 is integrated with the door 5. As a result, the door 5 opens and closes with the vehicle-body-side link 101 relatively rotating about the intermediate connection point X3 of the joint link 110, that is, the intermediate connection point X3 between the door-side link 102 and the vehicle-body-side link 101.

[0073] 22 and 23, the intermediate connection point X3 appears to be a new second rotation connection point X2' for the door 5. In other words, the second rotation connection point X2 for the door 5 shifts. As a result, the door device 20 of this embodiment is configured so that the door 5 supported by the link mechanism 15 opens and closes while the connection length L between the first and second rotation connection points X1, X2 is fixed to a constant value based on the length of the vehicle body link 101.

[0074] In the door device 20 of this embodiment, the size of the gap between the upper wall portion 102a and the lower wall 102b of the door-side link 102 that face each other in the vertical direction is wider than the vertical height dimension of the intermediate connection portion 113 of the vehicle-body-side link 101. As a result, in the door device 20 of this embodiment, the vehicle-body-side link 101 can rotate about the intermediate connection point X3 with the door-side link 102 without interfering with the door-side link 102.

[0075] In the door device 20 of this embodiment, the tension coil spring 145, which is engaged with the connecting shaft 129 and the locking portion 146 of the door bracket 122 that form the intermediate connection point X3, is disposed along the longitudinal direction of the door bracket 122. Furthermore, in the vehicle body-side link 101 of this embodiment, the intermediate connection portion 113 that forms the intermediate connection point X3 with the door-side link 102 has an outer shape with a generally U-shaped cross section, and the inner dimension of the U-shape is larger than the coil diameter of the tension coil spring 145. Utilizing this, the door device 20 of this embodiment disposes the tension coil spring 145 at a height position that overlaps with the intermediate connection portion 113 of the vehicle body-side link 101 in the up-down direction along the connecting shaft 129 that forms the intermediate connection point X3.

[0076] Specifically, in the door device 20 of this embodiment, the tension coil spring 145 is disposed between the upper wall 122a and the lower wall 122b of the door bracket 122 at a height position substantially equal to that of the vehicle body side link 101. As a result, the door device 20 of this embodiment is configured such that foreign matter is less likely to interfere with the tension coil spring 145 that constitutes the biasing member 140 of the door side link 102, regardless of the rotation position of the vehicle body side link 101.

[0077] <Engagement protrusion on the vehicle body side link and cam groove on the door bracket> 15 and 20 to 23, in door device 20 of this embodiment, door bracket 122 has upper wall 122a and lower wall 122b that form a generally U-shaped cross section, and lower wall 122b has a larger flat plate shape than upper wall 122a. Door bracket 122 of this embodiment has lower wall 122b as cam member 160 provided on door 5, and is provided with cam groove 170 that is provided in a manner that penetrates lower wall 122b in the thickness direction.

[0078] In the door device 20 of this embodiment, an engaging member 180 having an engaging portion 180x with the cam groove 170 is provided on the vehicle body side link 101. The door device 20 of this embodiment is configured to regulate the opening and closing operation of the door 5 supported by the second link arm 12 configured as the joint link 110 by a cam mechanism 190 formed by the cam groove 170 and the engaging member 180.

[0079] More specifically, in the door apparatus 20 of this embodiment, the engaging member 180 on the vehicle body side link 101 side has a generally shaft-like outer shape that protrudes downward from the vehicle body side link 101 while vertically penetrating the intermediate connection portion 113 with the door side link 102. Furthermore, this engaging member 180 has a roller 185 that is rotatable around the shaft. The engaging member 180 of this embodiment is configured so that this roller 185 serves as an engaging portion 180x for the cam groove 170 provided in the lower wall 122b of the door bracket 122.

[0080] Also, as shown in Figure 24, in the door device 20 of this embodiment, a first groove portion 171 and a second groove portion 172 extending along the longitudinal direction of the door bracket 122 are provided on the lower wall 122b of the door bracket 122 that constitutes the cam member 160.

[0081] More specifically, in the door bracket 122 of this embodiment, the first groove 171 and the second groove 172 are provided so as to penetrate the lower wall 122b in the thickness direction. The first groove 171 has a generally linear groove shape extending along the longitudinal direction of the door bracket 122, on the second end 132 side of the position where the door bracket 122 forms the second rotation connection point X2. The second groove 172 has a generally arc-shaped groove shape that convex in the direction away from the vertical wall 122c of the door bracket 122 arranged along the inner surface 5s of the door 5. The door bracket 122 of this embodiment is configured so that the first groove 171 and the second groove 172 are connected, and the cam groove 170 provided in the lower wall 122b forms an extension region extending in the longitudinal direction of the door bracket 122. In other words, the cam groove 170 of the cam member 160 provided on the door 5 is configured to extend in the vehicle front-rear direction, which is the opening width direction of the door opening 3.

[0082] That is, in the door device 20 of this embodiment, the vehicle-body-side link 101 constituting the joint link 110 rotates about a first rotation connection point X1 with respect to the vehicle body 2 while rotating relative to the door-side link 102 about its intermediate connection point X3 based on the opening and closing operation of the door 5. Furthermore, in the door device 20 of this embodiment, at an opening and closing operation position near the fully closed position P0 where the door-side engaging portion 31 and the vehicle-body-side engaging portion 32 are engaged, the door-side link 102 rotates about a second rotation connection point X2 with respect to the door 5. As a result, the door device 20 of this embodiment is configured so that the engaging portion 180x of the engaging member 180 arranged in the cam groove 170 moves within the first groove portion 171 within the range in which the door 5 performs opening and closing operation along a linear sliding trajectory Rs.

[0083] Furthermore, in the door device 20 of this embodiment, as described above, the door-side link 102 is pressed against the door bracket 122, thereby restricting the rotation of the door-side link 102 around the second rotation connection point X2 relative to the door 5. As a result, the door device 20 of this embodiment is configured so that the engaging portion 180x of the engaging member 180 arranged in the cam groove 170 moves within the second groove portion 172 within the range in which the door 5 performs opening and closing operations while describing the arc-shaped glide locus Rg.

[0084] In other words, the door device 20 of this embodiment has opening and closing operation positions of the door 5 where the opening and closing operation locus R of the door 5 transitions from the slide locus Rs to the glide locus Rg, or from the glide locus Rg to the slide locus Rs (see FIGS. 3 to 6). The door device 20 of this embodiment is configured so that, when the opening and closing operation locus R transitions, the engaging portion 180x of the engaging member 180 disposed in the cam groove 170 passes through the connection position of the first groove portion 171 and the second groove portion 172.

[0085] Furthermore, in the door device 20 of this embodiment, the engagement member 180 provided on the vehicle body link 101 engages with the cam groove 170 of the cam member 160 provided on the door 5, thereby restricting the movement of the joint link 110. Specifically, the relative rotation between the vehicle body link 101 and the door side link 102 is restricted depending on the engagement position of the engagement member 180 in the cam groove 170, i.e., the position of the roller 185 that serves as the engagement portion 180x. Similarly, based on the position of the roller 185 in the cam groove 170, the rotation of the door 5 around the second rotation connection point X2 formed by the door side link 102 is restricted. Thus, the door device 20 of this embodiment is capable of opening and closing the door 5 in a stable position that suppresses shaking and vibration of the door 5.

[0086] <Cam groove width change section> In the door device 20 of this embodiment, the roller 185 of the engaging member 180 disposed in the cam groove 170 moves within the cam groove 170 based on the fully closing operation of the door 5, and thereby approaches the extended end 171 e of the first groove portion 171. Then, the roller 185 of the engaging member 180, which moves within the cam groove 170 based on the fully opening operation of the door 5, approaches the extended end 172 e of the second groove portion 172.

[0087] That is, in the cam groove 170 of this embodiment, based on the arrangement of the door bracket 122 fixed to the inner surface 5s of the door 5, the extending end 171e of the first groove portion 171 located on the closed side (left side in FIG. 24) of the extending area extending in the opening width direction of the door opening 3 is its closing end 170a. And the extending end 172e of the second groove portion 172 located on the open side (right side in FIG. 24) of the extending area extending in the opening width direction of the door opening 3 is its opening end 170b.

[0088] In the door device 20 of this embodiment, the cam groove 170 has a groove width change section α set on the open side of the extension area including the open-side end 170b. In the door device 20 of this embodiment, the groove width W1 of the cam groove 170 in the groove width change section α is set narrower than the groove width W0 of the cam groove 170 on the closed side of the extension area beyond the groove width change section α (W1 <W0)。

[0089] More specifically, in the door device 20 of this embodiment, the groove width changing section α is provided in the second groove portion 172 having the open end portion 170b of the cam groove 170. In the door device 20 of this embodiment, the arrangement of the groove width changing section α is set based on the bending shape of the joint link 110 that changes in response to the opening and closing operation of the door 5, i.e., the relative rotation state of the vehicle body side link 101 and the door side link 102 that constitute the joint link 110.

[0090] Specifically, in the door device 20 of this embodiment, a straight line passing through the intermediate connection point X3 and the second rotation connection point X2 between the vehicle-body link 101 and the door-side link 102 is defined as the reference line M. That is, as described above, the stopper portion 148 serving as the rotation restriction portion 150 restricts the rotation of the door-side link 102 about the second rotation connection point X2, so that the vehicle-body link 101 apparently rotates relative to the door 5 about the intermediate connection point X3. Furthermore, in the door device 20 of this embodiment, when the vehicle-body link 101 rotates about the intermediate connection point X3 beyond the reference line M in this state, the position where the roller 185 of the engaging member 180 provided on the vehicle-body link 101 engages with the cam groove 170 is defined as the reference position Q. The cam groove 170 of this embodiment is configured so that the groove width change section α is located on the open side of the extension region of the reference position Q.

[0091] That is, in the groove width changing section α, the roller 185 of the engaging member 180 arranged in the cam groove 170 is likely to be engaged in a state of abutting against the side wall surface 170s of the cam groove 170 based on the narrow groove width W1 set in this groove width changing section α. ​​More specifically, the roller 185 of the engaging member 180 is likely to be engaged in a state of being pressed against the inner arc-shaped wall surface 172sa of the second groove portion 172 having a substantially arc-shaped groove shape. This enables the door device 20 of this embodiment to effectively suppress swaying and vibration of the door 5.

[0092] In the door device 20 of this embodiment, a reaction force generated when the roller 185 of the engaging member 180 is pressed against the inner arc-shaped wall surface 172sa of the cam groove 170 is transmitted to the door-side link 102 via the vehicle-body-side link 101. In the door device 20 of this embodiment, the direction of the force acting on the door-side link 102 based on the reaction force of the roller 185 pressed against the inner arc-shaped wall surface 172sa of the cam groove 170 changes depending on the bending shape of the joint link 110.

[0093] Specifically, when the roller 185 in the cam groove 170 is positioned closer to the open side of the extension region than the reference position Q, the reaction force of the roller 185 acts in a direction pressing the door-side link 102 against the stopper portion 148 at the contact point X0 with the stopper portion 148. Furthermore, in the door device 20 of this embodiment, elastic deformation of the stopper portion 148 against which the door-side link 102 is pressed, more specifically, elastic deformation of the buffer member 149 provided on the stopper portion 148, is permitted. As a result, the reaction force generated when the roller 185 of the engaging member 180 is pressed against the inner arc-shaped wall surface 172sa of the cam groove 170 is alleviated at the contact point X0 of the door-side link 102 with the stopper portion 148.

[0094] When the roller 185 in the cam groove 170 is positioned on the closed side of the extension range from the reference position Q, the reaction force of the roller 185 acts in a direction to move the door-side link 102 away from the stopper portion 148 at the contact point X0 with the stopper portion 148. Therefore, on the closed side of the extension range from the reference position Q, it is difficult to obtain the effect of stabilizing the posture of the door 5 by setting the narrow groove width W1.

[0095] Furthermore, when the roller 185 in the cam groove 170 is at the reference position Q, the vehicle body link 101 and the door side link 102 that constitute the joint link 110 are positioned on the reference line M. Therefore, the reaction force of the roller 185 cannot be alleviated by the joint link 110. That is, in this state, the reaction force generated when the roller 185 of the engaging member 180 is pressed against the inner arc-shaped wall surface 172sa of the cam groove 170 acts on the intermediate connection point X3 and the second rotation connection point X2 between the vehicle body side link 101 and the door side link 102. As a result, if a narrow groove width W1 is set at the reference position Q, it becomes difficult for the vehicle body side link 101 to smoothly rotate about the intermediate connection point X3 beyond the reference line M.

[0096] In consideration of this, in the door device 20 of this embodiment, the groove width changing section α is defined as the open side of the extension region of the reference position Q set in the cam groove 170 based on the reference line M passing through the intermediate connection point X3 and the second rotation connection point X2 of the joint link 110. As a result, the door device 20 of this embodiment can smoothly move within the groove width changing section α while the roller 185 of the engaging member 180 located in the groove width changing section α is pressed against the inner arc-shaped wall surface 172sa of the cam groove 170. In other words, the door 5 supported by the second link arm 12 configured as the joint link 110 including the cam mechanism 190 formed by the cam groove 170 and the engaging member 180 can be smoothly opened and closed.

[0097] Furthermore, the cam groove 170 of this embodiment has a gradual-change section β in which the groove width W gradually narrows toward the open side of the extension region (the right side in FIG. 24 ). In the cam groove 170 of this embodiment, this gradual-change section β is provided in a boundary region adjacent to the groove width change section α. ​​That is, in this gradual-change section β, the groove width W gradually narrows from the closed side to the open side of the extension region, from groove width W0 of the cam groove 170 on the closed side of the extension region to groove width W1 of the gradual-change section β. This allows the door device 20 of this embodiment to smoothly advance the roller 185 of the engaging member 180, which moves within the cam groove 170 in response to the opening operation of the door 5, into the groove width change section α.

[0098] <Door stopper> As shown in FIGS. 24 and 25 , the door device 20 of this embodiment includes a door stopper 200 provided on the door bracket 122. In the door device 20 of this embodiment, the door stopper 200 has a generally flat plate-like outer shape that spans the upper wall 122a and the lower wall 122b of the door bracket 122. The door stopper 200 also has an abutment surface 200s to which a buffer member 201 having a generally flat plate-like outer shape is fixed. The door stopper 200 is also erected near the open end 170b of a cam groove 170 provided in the lower wall 122b of the door bracket 122. The door stopper 200 of this embodiment is configured so that when the door 5 is in the fully open position P1, the second link arm 12 that supports the door 5 abuts against the abutment surface 200s. More specifically, the vehicle body link 101 that constitutes the articulated link abuts against the abutment surface 200s.

[0099] That is, in the door device 20 of this embodiment, the door stopper 200 has the second link arm 12 connected to the door 5 via the door bracket 122 as the abutment link 210. Furthermore, when the door 5 is in the fully open position P1, the second link arm 12 abuts against the door stopper 200, thereby restricting the relative rotation between the second link arm 12 and the door 5. Thus, the door device 20 of this embodiment is configured to stably support the door 5 supported by the second link arm 12 at the fully open position P1.

[0100] 26 and 27, the door device 20 of this embodiment includes a door stopper 220 provided on the door bracket 64 on the side of the first link arm 11. In the door device 20 of this embodiment, the door stopper 220 is fixed to the door bracket 64 in a state of extending in the vertical direction parallel to a support shaft 221 of the first link arm 11 provided on the door bracket 64. The door stopper 220 of this embodiment is configured so that the first link arm 11, more specifically, the base end bracket 61 constituting the tip end 11a thereof, abuts against it when the door 5 is in the fully open position P1.

[0101] That is, in the door device 20 of this embodiment, the door stopper 220 has the first link arm 11 connected to the door 5 via the door bracket 64 as the abutment link 210. Furthermore, when the door 5 is in the fully open position P1, the first link arm 11 abuts against the door stopper 220, thereby restricting the relative rotation between the first link arm 11 and the door 5. Thus, the door device 20 of this embodiment is configured to more stably support the door 5 supported by the first link arm 11 at the fully open position P1.

[0102] More specifically, in the door device 20 of this embodiment, when the door 5 reaches the fully open position P1 after performing the opening operation, only the door stopper 220, which uses the first link arm 11 as the abutment link 210, abuts against the first link arm 11. That is, in this state, the door stopper 220, which uses the second link arm 12 as the abutment link 210, does not abut against the second link arm 12. In the door device 20 of this embodiment, when the door stopper 220 abuts against the first link arm 11, the door 5 and the second link arm 12 rotate relative to each other, causing the door stopper 220 to abut against the second link arm 12.

[0103] In other words, in the door device 20 of this embodiment, the first link arm 11 positioned on the main link 21 is the first abutment link 211, and the door stopper 220 abutting against this first link arm 11 is the first door stopper 231. The second link arm 12 positioned on the sub-link 22 is the second abutment link 212, and the door stopper 200 abutting against this second link arm 12 is the second door stopper 232. The door device 20 of this embodiment is configured so that when the second abutment link 212 and the door 5 rotate relatively with the first abutment link 211 abutting against the first door stopper 231, the second door stopper 232 abuts against the second abutment link 212.

[0104] That is, in the door device 20 that supports the door 5 by the link mechanism 15 having the first and second link arms 11, 12, the first and second link arms 11, 12 are allowed to move independently of each other, taking into consideration tolerances, assembly errors, etc. In a configuration that uses a variable link 100 having a variable connection length mechanism 50, the variable link 100 is likely to move independently.

[0105] In consideration of this, in the door device 20 of this embodiment, when the door 5 is in the fully open position P1, priority is given to the abutment between the first door stopper 231 and the first abutment link 211 out of the first door stopper 231 and the second door stopper 232 provided on the door 5. As a result, the door device 20 of this embodiment ensures a constant support posture by the link mechanism 15 when the door 5 is in the fully open position P1.

[0106] Furthermore, in the door device 20 of this embodiment, both the first door stopper 231 and the second door stopper 232 abut against the corresponding first abutment link 211 and second abutment link 212, respectively, thereby simultaneously restricting relative rotation with respect to the door 5. This enables the door device 20 of this embodiment to stably support the door 5 at the fully open position P1, for example, when an external force acts on the door 5.

[0107] <Down stopper> 28 and 29, the door device 20 of this embodiment includes a door-side fitting portion 241 provided at the closing-side end portion 33 of the door 5, and a vehicle-body-side fitting portion 242 provided at the closing-side end portion 34 of the door opening portion 3. Furthermore, in the door device 20 of this embodiment, the door-side fitting portion 241 and the vehicle-body-side fitting portion 242 fit together based on the fully closing operation of the door 5. The door device 20 of this embodiment is configured to stably support the door 5 arranged in the fully open position P1 by a down stopper 250 formed by the door-side fitting portion 241 and the vehicle-body-side fitting portion 242.

[0108] More specifically, in the vehicle 1 of this embodiment, the door-side fitting portion 241 is disposed near the door-side engaging portion 31 at the front end 5f of the door 5, which corresponds to the closing-side end 33 of the door 5. The vehicle-body-side fitting portion 242 is disposed near the vehicle-body-side engaging portion 32 at the front edge 3f of the door opening 3, which corresponds to the closing-side end 34 of the door opening 3. Furthermore, in the door device of this embodiment, the door-side fitting portion 241 has a protruding fitting protrusion 241x, and the vehicle-body-side fitting portion 242 has a fitting recess 242x. The down stopper 250 of this embodiment is configured to ensure a stable holding force for the door 5 disposed in the fully closed position P0 by the fitting of the fitting protrusion 241x of the door-side fitting portion 241 with the fitting recess 242x of the vehicle-body-side fitting portion 242.

[0109] <Operation of this embodiment> That is, by setting the groove width changing section α with a narrow groove width W1, in this groove width changing section α, the roller 185 of the engaging member 180 arranged in the cam groove 170 is likely to be engaged in a state of abutting against the side wall surface 170s of the cam groove 170. As a result, the engagement between the engaging member 180 provided on the variable link 100 and the cam groove 170 of the cam member 160 provided on the door 5 makes it easier to achieve the effect of stabilizing the posture of the door 5.

[0110] <Effects of this embodiment> Next, the effects of this embodiment will be described. (1) The door device 20 includes an engaging member 180 provided on a variable link 100 that includes a connecting length varying mechanism 50, and a cam member 160 provided on the door 5, the cam member 160 having a cam groove 170 with which the engaging member 180 engages. Furthermore, the extended end 172e of the cam groove 170 that is adjacent to the engaging portion 180x of the engaging member 180 that moves within the cam groove 170 based on the fully-opening operation of the door 5 is defined as the open-side end 170b of the cam groove 170. The cam groove 170 has a groove width changing section α that is set on the open side of the extended region including the open-side end 170b, and the groove width W1 of the cam groove 170 in the groove width changing section α is narrower than the groove width W0 on the closed side of the extended region than the groove width changing section α.

[0111] According to the above configuration, the door 5 supported by the link mechanism 15 configured using the variable link 100 having the variable connection length mechanism 50 can be more effectively suppressed from shaking and vibrating.

[0112] (2) The variable link 100 is configured as a joint link 110 that rotatably connects a vehicle body side link 101 having a first rotation connection point X1 and a door side link 102 having a second rotation connection point X2.

[0113] That is, by using the joint link 110, the connection length L between the first and second rotation connection points X1, X2 can be changed based on the relative rotation of the vehicle body side link 101 and the door side link 102. Furthermore, the joint link 110 ensures a high degree of design freedom for the opening and closing operating posture of the door 5 based on its bent shape, but the door 5 supported by this joint link 110 is prone to shaking and vibration. Therefore, by applying such a joint link 110 to a configuration in which it is used in the variable link 100, more significant effects can be obtained.

[0114] (3) The door device 20 includes a rotation restricting portion 150 that restricts the relative rotation of the door-side link 102 with respect to the door 5 about the second rotation connection point X2 by contacting the door-side link 102 that has rotated about the second rotation connection point X2 based on the opening operation of the door 5. A straight line passing through the intermediate connection point X3 between the vehicle-side link 101 and the door-side link 102 and the second rotation connection point X2 is defined as a reference line M. When the vehicle-side link 101 rotates about the intermediate connection point X3 beyond the reference line M, a position where the roller 185 constituting the engaging portion 180x of the engaging member 180 provided on the vehicle-side link 101 engages with the cam groove 170 is defined as a reference position Q. The groove width changing section α is located on the opening side of the extension region of the cam groove 170 relative to the reference position Q.

[0115] That is, the rotation of the door-side link 102 about the second rotation connection point X2 is restricted by the abutment against the stopper portion 148 serving as the rotation restriction portion 150, and the vehicle-body-side link 101 apparently rotates relative to the door 5 about the intermediate connection point X3. At this time, a reaction force generated by pressing the roller 185 of the engaging member 180 against the side wall surface 170s of the cam groove 170 is transmitted to the door-side link 102 via the vehicle-body-side link 101. Furthermore, when the roller 185 in the cam groove 170 is positioned on the open side of the extension range relative to the reference position Q, the reaction force of the roller 185 acts in a direction pressing the door-side link 102 against the stopper portion 148 at the abutment point X0 with the stopper portion 148. By allowing the stopper portion 148 against which the door-side link 102 is pressed to elastically deform, the reaction force generated when the roller 185 of the engaging member 180 is pressed against the side wall surface 170s of the cam groove 170 is alleviated. Therefore, with the above configuration, the roller 185 of the engaging member 180 located in the groove width changing section α can move smoothly within the groove width changing section α while being pressed against the side wall surface 170s of the cam groove 170. This ensures the effect of stabilizing the posture of the door 5, which is achieved by setting the groove width changing section α with a narrow groove width W1, and allows the door 5 supported by the variable link 100 configured as the joint link 110 to be opened and closed smoothly.

[0116] (4) The door device 20 includes a door stopper 220 that uses the first link arm 11 as the abutment link 210 and abuts against the first link arm 11 when the door 5 is at the fully closed position P0, thereby restricting relative rotation between the first link arm 11 and the door 5. The door device 20 also includes a door stopper 200 that uses the second link arm 12 as the abutment link 210 and abuts against the second link arm 12 when the door 5 is at the fully closed position P0, thereby restricting relative rotation between the second link arm 12 and the door 5.

[0117] According to the above configuration, the door 5 supported by the link mechanism 15 formed by the first and second link arms 11, 12 can be stably supported at the fully open position P1.

[0118] (5) In the door device 20, the first link arm 11 is the first abutment link 211, and the door stopper 220 that abuts against the first link arm 11 is the first door stopper 231. In addition, in the door device 20, the second link arm 12 is the second abutment link 212, and the door stopper 200 that abuts against the second link arm 12 is the second door stopper 232. In the door device 20, when the second abutment link 212 and the door 5 rotate relatively with respect to each other while the first abutment link 211 abuts against the first door stopper 231, the second door stopper 232 abuts against the second abutment link 212.

[0119] According to the above configuration, by prioritizing the contact between the first abutment link 211 and the first door stopper 231, a constant support posture by the link mechanism 15 can be ensured when the door 5 is in the fully open position P1. Furthermore, both the first door stopper 231 and the second door stopper 232 contact the corresponding first abutment link 211 and second abutment link 212, respectively, thereby simultaneously restricting relative rotation with respect to the door 5. This makes it possible to more stably support the door 5 in the fully open position P1.

[0120] (6) The cam groove 170 has a gradually changing section β in which the groove width W gradually narrows toward the open side of the stretching region. According to the above configuration, the roller 185 of the engaging member 180 that moves in the cam groove 170 in response to the opening operation of the door 5 can smoothly enter the extension area in which the narrower groove width W is set.

[0121] The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other within the scope of technical compatibility.

[0122] In the above embodiment, the second link arm 12 is the variable link 100 having the variable connection length mechanism 50. However, this is not limited to this, and the present invention may be applied to a configuration in which the first link arm 11 is the variable link 100 having the variable connection length mechanism 50. Furthermore, the present invention may be applied to a configuration in which both the first and second link arms 11, 12 are variable links 100.

[0123] In the above embodiment, the variable link 100 is a joint link 110 that rotatably connects a vehicle body-side link 101 having a first rotational connection point X1 and a door-side link 102 having a second rotational connection point X2. However, the configuration of the variable link 100 is not limited to this, and may be changed arbitrarily as long as it functions as the variable connection length mechanism 50. For example, the variable link 100 may be configured using an expandable link that can change the connection length L between the first and second rotational connection points X1 and X2 by relatively displacing the first and second link members in the axial direction.

[0124] Furthermore, even when the joint link 110 is used in the variable link 100, the configuration of the joint link 110 may be changed as desired. For example, the shapes of the vehicle body side link 101 and the door side link 102 that constitute the joint link 110 may be changed as desired. Furthermore, the arrangement of the vehicle body side link 101 and the door side link 102, including the positional relationship between the intermediate connection point X3 and the second rotation connection point X2 relative to the door 5, may also be changed as desired.

[0125] In the above embodiment, the tension coil spring 145 is used as the biasing member 140 to bias the door-side link 102 to rotate around the second rotation connection point. However, the configuration of the biasing member 140 is not limited to this, and may be changed as desired. For example, the door-side link 102 may be biased to rotate using a torsion spring, a compression spring, or the like. Furthermore, instead of a spring member, a gas-type or electromagnetic-type biasing member may be used. The arrangement of the biasing member 140 may also be changed as desired.

[0126] Furthermore, it is not necessarily required to have the biasing member 140. For example, it may be applied to a configuration in which the vehicle body side link 101 and the door side link 102 are rotated relative to each other using a motor, a solenoid, or the like as a drive source, thereby changing the connection length L between the first and second rotation connection points X1, X2.

[0127] In the above embodiment, the lower wall 122b of the door bracket 122 constitutes the cam member 160 on the door 5 side having the cam groove 170. However, this is not limiting, and the upper wall 122a of the door bracket 122 may function as the cam member 160. Furthermore, the cam member 160 may be provided separately from the door bracket 122.

[0128] In the above embodiment, the cam groove 170 of the cam member 160 has a first groove portion 171 having a substantially linear groove shape and a second groove portion 172 having a substantially arc-shaped groove shape. Furthermore, these first groove portion 171 and second groove portion 172 form an extension region that extends in the opening width direction of the door opening portion 3. The extension end portion 172e of the second groove portion 172 located on the open side of this extension region is set as the open-side end portion 170b of the cam groove 170, and the engagement portion 180x of the engagement member 180 that moves within the cam groove 170 based on the full-open operation of the door 5 approaches this open-side end portion 170b.

[0129] However, the groove shape of the cam groove 170 is not limited to this, and may be changed arbitrarily to match the configuration of the variable link 100 provided with the engaging member 180 placed in the cam groove 170, and the opening / closing operation trajectory R of the door 5 based on the operation of the variable connection length mechanism 50.

[0130] Furthermore, the groove width W of the cam groove 170 may also be set arbitrarily. That is, it is sufficient that the groove width W1 of the cam groove 170 in the groove width changing section α set on the open side of the extension area is narrower than the groove width W0 on the closed side of the extension area beyond the groove width changing section α, and the dimensions of these groove widths W1 and W0 are arbitrary.

[0131] The groove width changing section α can also be set at any position in the extension region of the cam groove 170. However, it is preferable that the engaging portion 180x of the engaging member 180 arranged in the cam groove 170 be able to move smoothly within the groove width changing section α while being pressed against the side wall surface 170s of the cam groove 170 based on the narrow groove width W1 set in the groove width changing section α.

[0132] Furthermore, the shape of the engaging member 180 on the variable link 100 side that engages with the cam groove 170 may also be changed as desired. For example, the engaging portion 180x that engages with the cam groove 170 does not necessarily have to be the roller 185.

[0133] In the above embodiment, the cam groove 170 has a gradually changing section β in which the groove width W gradually narrows toward the open side of the extension region. This gradually changing section β is provided in a boundary region adjacent to the groove width changing section α. ​​However, this is not limiting, and the gradually changing section β may be included within the groove width changing section α. ​​In other words, the groove width W1 in the groove width changing section α need only be narrower than the groove width W0 on the closed side of the extension region than in the groove width changing section α, and does not necessarily have to be constant.

[0134] For example, a gradual change section β may be provided near the open end 170b of the cam groove 170. By adopting such a configuration, it is possible to enhance the effect of stabilizing the posture of the door 5 by setting a narrow groove width W1 in the groove width change section α. ​​This makes it possible to more stably support the door 5 when the door 5 is in the fully open position P1.

[0135] The cam groove 170 may not have the gradually changing section β. In the above embodiment, the door stopper 220 having the first link arm 11 as the abutment link 210 and the door stopper 200 having the second link arm 12 as the abutment link 210 are provided. When the door 5 is in the fully closed position P0, these door stoppers 220, 200 abut against the first and second link arms 11, 12 that serve as the abutment links 210, respectively, thereby restricting relative rotation with the door 5. However, this is not limiting, and a configuration may be provided that includes either the door stopper 220 having the first link arm 11 as the abutment link 210 or the door stopper 200 having the second link arm 12 as the abutment link 210.

[0136] In the above embodiment, the first link arm 11 and the door stopper 220 are the first abutment link 211 and the first door stopper 231, and the second link arm 12 and the door stopper 200 are the second abutment link 212 and the second door stopper 232. When the second abutment link 212 and the door 5 rotate relatively with the first abutment link 211 abutting against the first door stopper 231, the second door stopper 232 abuts against the second abutment link 212.

[0137] However, the present invention is not limited to this, and the second link arm 12 and the door stopper 200 may be the first abutment link 211 and the first door stopper 231, and the first link arm 11 and the door stopper 220 may be the second abutment link 212 and the second door stopper 232. Then, the first abutment link 211 and the second abutment link 212 may be configured to abut against the first door stopper 231 and the second door stopper 232, respectively, at approximately the same timing based on the full-open operation of the door 5.

[0138] The door stoppers 200, 220 described above may also be applied to a configuration in which neither the first nor second link arms 11, 12 are variable links 100, or in which neither of them has the cam mechanism 190 formed by the cam groove 170 and the engaging member 180.

[0139] In the above embodiment, the first link arm 11 configured as the main link 21 is positioned above the second link arm 12 configured as the sub-link 22. The second link arm 12 is positioned closer to the closing end 33 of the door 5 than the first link arm 11. However, the present invention is not limited to this, and the positions of the first and second link arms 11, 12 may be changed as desired.

[0140] In the above embodiment, the first link arm 11 is configured as the driving link 55, and the first link arm 11 is rotationally driven by the driving device 51. However, this is not limiting, and the second link arm 12 may be configured as the driving link 55. Furthermore, both the first and second link arms 11, 12 may be configured as driving links 55. The number and arrangement of the driving devices 51 may also be changed as desired.

[0141] In the above embodiment, the present invention is applied to a configuration in which the door 5 of the vehicle 1 opens toward the rear of the vehicle, but it may also be applied to a configuration in which the door 5 opens toward the front of the vehicle. Furthermore, it may also be applied to a manual vehicle door device that does not have a drive device 51.

[0142] In the above embodiment, the door-side engaging portion 31 has the shaft-shaped engaging portion 41, and the vehicle-body-side engaging portion 32 has the guide groove 42. However, this is not limiting, and the door-side engaging portion 31 may have the guide groove 42, and the vehicle-body-side engaging portion 32 may have the shaft-shaped engaging portion 41. Also, although the shaft-shaped engaging portion 41 is formed by a roller 41x that is rotatable around a support shaft, the shaft-shaped engaging portion 41 does not necessarily have to rotate. And, as long as it has a shape that functions as a guide engaging portion that guides the opening and closing operation of the door 5 when placed in the guide groove 42, it does not necessarily have to have a shaft shape.

[0143] The number and arrangement of the door-side engaging portions 31 and the vehicle-body-side engaging portions 32 may be changed as desired. The present invention may also be applied to a configuration that does not include such door-side engaging portions 31 and vehicle-body-side engaging portions 32.

[0144] <Additional Notes> Next, the technical ideas that can be understood from the above-described embodiment and modified examples will be described. (i) The variable link is a joint link that rotatably connects a vehicle body side link having the first rotation connection point and a door side link having the second rotation connection point.

[0145] That is, by using a joint link, the connection length between the first and second pivot connection points can be changed based on the relative rotation of the vehicle body link and the door link. Furthermore, while the joint link ensures a high degree of design freedom for the door opening and closing operating posture based on its bending shape, the door supported by the joint link is prone to shaking and vibration. Therefore, by applying such a joint link to a configuration using a variable link, more significant effects can be obtained.

[0146] (b) A rotation restriction portion is provided which restricts the relative rotation of the door-side link with respect to the door around the second rotation connection point by abutting against the door-side link which has rotated around the second rotation connection point based on the door-opening operation, and the groove width change section is provided on the opening side of the extension area of ​​the cam groove of a reference position where the engaging portion of the engaging member provided on the vehicle-side link engages with the cam groove when the vehicle-side link rotates around the intermediate connection point beyond a reference line passing through the intermediate connection point between the vehicle-side link and the door-side link and the second rotation connection point.

[0147] That is, the door-side link's rotation about the second rotation connection point is restricted by contact with the rotation restriction portion, and the vehicle-side link appears to rotate about the intermediate connection point relative to the door. At this time, a reaction force generated when the engaging portion of the engaging member is pressed against the side wall surface of the cam groove is transmitted to the door-side link via the vehicle-side link. Furthermore, when the engaging portion in the cam groove is positioned closer to the open side of the extension range than the reference position, the reaction force of the engaging portion acts in a direction that presses the door-side link against the rotation restriction portion at the contact point with the rotation restriction portion. By allowing the rotation restriction portion against which the door-side link is pressed to elastically deform, the reaction force generated when the engaging portion of the engaging member is pressed against the side wall surface of the cam groove is alleviated. Therefore, with the above configuration, the engaging portion of the engaging member positioned in the groove width changing section can move smoothly within the groove width changing section while being pressed against the side wall surface of the cam groove. This allows the door supported by the variable link configured as a joint link to be opened and closed smoothly while ensuring the effect of stabilizing the door's posture by setting a groove width change section with a narrow groove width.

[0148] (c) At least one of the first and second link arms is an abutment link, and a door stopper is provided that abuts against the abutment link when the door is in the fully open position, thereby restricting the relative rotation of the abutment link and the door.

[0149] According to the above configuration, the door supported by the link mechanism formed by the first and second link arms can be stably supported in the fully open position. (ii) A first door stopper is provided, in which one of the first and second link arms serves as a first abutment link and abuts against the first abutment link, and the other of the first and second link arms serves as a second abutment link and abuts against the second abutment link, and when the second abutment link and the door rotate relative to each other while the first abutment link is abutting against the first door stopper, the second abutment link abuts against the second door stopper.

[0150] According to the above configuration, by prioritizing the contact between the first abutment link and the first door stopper, a consistent support posture by the link mechanism can be ensured when the door is in the fully open position. Furthermore, both the first door stopper and the second door stopper contact the corresponding first abutment link and second abutment link, respectively, thereby simultaneously restricting relative rotation with respect to the door. This allows the door to be supported in the fully open position more stably.

[0151] (e) The cam groove has a gradually changing section in which the groove width gradually narrows toward the open side of the stretching region. According to the above configuration, the contact portion of the engaging member that moves within the cam groove in response to the door opening operation can smoothly enter the extension region in which the narrower groove width is set. [Explanation of symbols]

[0152] 1...vehicle, 2...vehicle body, 5...door, 11...first link arm, 12...second link arm, 15...link mechanism, 20...door device, 50...connection length variable mechanism, 100...variable link, 160...cam member, 170...cam groove, 170b...opening end, 172e...extension end, 180...engaging member, 180x...engaging portion, 185...roller, X1...first pivotal connection point, X2...second pivotal connection point, L...connection length, W, W0, W1...groove width, α...groove width change section.

Claims

1. first and second link arms having a first pivot connection point to the vehicle body and a second pivot connection point to the vehicle door; The door opens and closes based on the operation of a link mechanism formed by the first and second link arms, At least one of the first and second link arms is a variable link having a variable connection length mechanism that can change the connection length between the first and second pivot connection points, an engaging member provided on the variable link; a cam member provided on the door, the cam member having a cam groove with which the engaging member engages; The extended end of the cam groove, to which the engaging portion of the engaging member that has moved within the cam groove based on the full-opening operation of the door approaches, is defined as an open end of the cam groove, The cam groove has a groove width change section set on the open side of the extension area including the open end, and the groove width of the cam groove in the groove width change section is narrower than the groove width of the cam groove on the closed side of the extension area than in the groove width change section.

2. The variable link is a joint link that rotatably connects a vehicle body side link having the first rotation connection point and a door side link having the second rotation connection point. The vehicle door device according to claim 1 .

3. a rotation restricting portion that restricts relative rotation of the door-side link with respect to the door about the second rotation connecting point by contacting the door-side link that has rotated about the second rotation connecting point based on an opening operation of the door, The groove width change section is provided on the opening side of the extension region of the cam groove relative to a reference position where an engaging portion of the engaging member provided on the vehicle body side link engages with the cam groove when the vehicle body side link rotates around the intermediate connection point beyond a reference line passing through the intermediate connection point between the vehicle body side link and the door side link and the second pivot connection point. The vehicle door device according to claim 2.

4. At least one of the first and second link arms is an abutment link, and a door stopper is provided which abuts against the abutment link when the door is in a fully open position, thereby restricting the relative rotation of the abutment link and the door. The vehicle door device according to any one of claims 1 to 3.

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