JP5074780B2 - Power closer device for vehicle door - Google Patents

Description

  The present invention relates to a power closer device for a vehicle door for shifting a latch unit in a half latch state to a full latch state.

  In a door latch device that applies to a door body of a vehicle such as a four-wheeled vehicle, a closing actuator is driven when the vehicle door body such as a slide door is in a half-closed state by a closing operation, and a latch in a half-latch state is performed. Some have a closer mechanism that causes the vehicle door to be fully closed by shifting the unit to the fully latched state. In the latch unit that has shifted to the fully latched state, the ratchet engages with the latch and its movement is restricted, so that the vehicle door body is kept closed with respect to the vehicle body.

  On the other hand, if the door opening operation such as operating the door handle is performed while the closing actuator is driven, the power transfer from the closing actuator to the latch unit is interrupted by the swing of the failsafe lever. And the transition from the half latch state to the full latch state is immediately stopped. At the same time, in the latch unit, the ratchet is released by the swinging of the open lever and the engagement with the latch is released (unlatched state), so that the opening movement of the vehicle door body is allowed. Therefore, for example, even when a foreign object is caught between the vehicle body and the vehicle door body during the transition from the half-latch state to the full-latch state, this can be canceled by performing the door opening operation. (For example, refer to Patent Document 1).

JP 2005-139790 A

  By the way, in the apparatus described in Patent Document 1 described above, an open system power transmission means for transmitting the door opening operation to the open lever, and a closer system power transmission for transmitting the door handle opening operation to the fail safe lever of the closer mechanism. Means are provided individually. For this reason, for example, a link member and a wire cable for transmitting the door opening operation to the open link are individually required for each power transmission means. Absent.

  In view of these problems, an apparatus is also provided in which an open lever and a failsafe lever are linked. According to the device in which the open lever and the fail safe lever are linked, it is only necessary to transmit the door opening operation to any one of them, so that the number of parts and the manufacturing cost can be reduced.

  However, in an apparatus in which an open lever and a fail-safe lever are linked, the operation of the closer mechanism affects the operation of the open lever. For this reason, for example, when the vehicle suddenly starts, stops suddenly, travels on a sharp curve, or travels on rough roads, the closer mechanism is operated by the inertial force, which affects the engagement state between the latch and the ratchet via the open lever. There is a risk of effect.

  In view of the above circumstances, an object of the present invention is to provide a power closer device for a vehicle door body that can prevent an influence on a latch unit and can reduce the number of parts and the manufacturing cost.

In order to achieve the above object, a power closer device for a vehicle door according to claim 1 of the present invention latches via a closer mechanism when a closing actuator is driven when the closer mechanism is in a power transmission state. while shifting the latch at the half-latched state by transmitting power to the latch of the unit fully latched state, by swinging the open lever opening direction when it is open operating latch the ratchet latch units The power closer device for the vehicle door body is configured to release the latched state by rotating in a direction away from the vehicle and to disengage the power transmission from the closing actuator to the latch unit by shifting the closer mechanism to the non-transmitting state. a is, the latch unit, La on one side the striker entry groove as a reference With arranging a switch, disposed ratchet on the other side, closer mechanism comprises a linking mechanism that links between the open lever, it is shifted to the non-transmission state by the swinging of the door opening direction of the open lever On the other hand, it is equipped with a contact piece that operates in the half-latch state, and shifts to the full-latch state by engaging with the latch, and is linked to the side where the ratchet is disposed with respect to the striker entry groove Inertial force that arranges the means together with the open lever, and arranges the contact piece on the side where the latch is arranged with reference to the striker entry groove, and further swings the open lever in the door opening direction when in power transmission state The center of gravity position is set so that a force for maintaining the power transmission state is applied by this inertial force.

  According to a second aspect of the present invention, there is provided a power closer device for a vehicle door body according to the first aspect, wherein the closer mechanism is disposed at a neutral position with an input member that operates when a closing actuator is driven. An output member that shifts the latch unit to the fully latched state by engaging the latch unit that is in the half latched state when moved from the closed state to the fully latched position, and the input member and the output member. When the closing actuator is driven by engaging the two, the output member arranged at the neutral position is moved to the full latch position, while the actuator is moved to the predetermined cancel position. The cancel member for releasing the engagement state of the input member and the output member, and the cancel member An urging means for urging so as to maintain the hourly engagement position; and an oscillating means disposed so as to be able to oscillate around an axis having a predetermined crossing angle with respect to the oscillating axis of the open lever Are linked by a linkage link, and when the open lever swings in the door opening direction, it swings and engages with the cancel member, thereby canceling the cancel member against the biasing force of the biasing means. The cancel member is rotatable about a rotation axis parallel to the swing axis of the fail safe lever and intersects the swing axis of the fail safe lever. It is arranged to be slidable along the sliding direction, and is displaced between the engaging position and the canceling position by sliding along the sliding direction, while being arranged at the engaging position When the closing actuator is driven, the output member arranged at the neutral position is moved to the full latch position by rotating in one direction around the rotation axis, and the cancel member is arranged at the engaging position. When the inertial force that swings the open lever in the door opening direction is applied in this state, the center of gravity of the canceling member acts so that the moment around the rotation axis that maintains the engagement position acts on the canceling member due to this inertial force. The position is set.

  Moreover, the power closer apparatus of the vehicle door body which concerns on Claim 3 of this invention is the flat member extended in the radial direction centering on a rotating shaft center in the said Claim 2, in the said Claim 2, The center-of-gravity position is adjusted by increasing or decreasing the length in the radial direction from the rotation axis.

  According to the present invention, since the closer mechanism is provided with the linking means for linking with the open lever, and the open lever is shifted to the non-transmission state by swinging in the door opening direction, the door opening operation is individually performed for the closer mechanism. Therefore, it is possible to reduce the number of parts and the manufacturing cost. In addition, the closer mechanism sets the position of the center of gravity so that a force that maintains the power transmission state acts when an inertial force that swings the open lever in the door opening direction acts in the power transmission state. . Therefore, for example, even when an inertial force is applied to the vehicle, the closer mechanism maintained in the power transmission state does not cause the swing of the open lever in the door opening direction, which affects the engagement state between the latch and the ratchet. There is no fear of affecting.

  Exemplary embodiments of a power closer device for a vehicle door according to the present invention will be explained below in detail with reference to the accompanying drawings.

  1 to 4 show a door latch device to which a power closer device according to an embodiment of the present invention is applied. As shown in FIGS. 10 and 11, the door latch device exemplified here is applied to a sliding door D that is slidably disposed along the front-rear direction on the left side of the vehicle body B in a vehicle such as a four-wheeled vehicle. To do. The door latch device 1 is disposed at the vehicle rear side end portion of the slide door D, and regulates the opening movement of the slide door D with the striker S provided on the vehicle main body B.

  As shown in FIGS. 1 to 4, the door latch device 1 includes a latch unit 20 in a base plate 10. The base plate 10 is formed by appropriately forming a sheet metal, and an end portion located at the rear of the vehicle is bent toward the outside of the vehicle.

  The latch unit 20 is configured to have a unit case 21 at the vehicle rear side end portion of the base plate 10. As shown in FIG. 5, the latch unit 20 includes a latch 22 and a ratchet 23 inside the unit case 21. A ratchet lever 24 and a latch lever 25 are provided outside the unit case 21.

  The latch 22 is configured by providing a meshing groove 22c between two claw portions 22a and 22b. The latch 22 is supported by a latch shaft 26 disposed on the base plate 10, and rotates around the axis of the latch shaft 26 along the direction of the arrow 26 A and the arrow 26 B in FIG. Is possible. Although not clearly shown in the drawing, a latch spring is provided between the latch 22 and the unit case 21 to urge the latch 22 in the direction of the arrow 26B in FIG. It is.

  The ratchet 23 is for locking the claws 22 a and 22 b of the latch 22, and is supported on a ratchet shaft 27 disposed on the base plate 10. The ratchet 23 rotates around the axis of the ratchet shaft 27 along the direction of the arrow 27A and the direction of the arrow 27B in FIG. 5 inside the unit case 21, and its tip can be attached to and detached from the latch 22. .

  As shown in FIGS. 3 to 5, the ratchet lever 24 is supported on a portion of the ratchet shaft 27 that is outside the unit case 21. The ratchet lever 24 is linked to the ratchet 23 and can rotate around the axis of the ratchet shaft 27 in a manner interlocking with the rotation of the ratchet 23. Although not explicitly shown in the drawing, a ratchet spring is provided between the ratchet lever 24 and the base plate 10 to constantly bias the ratchet 23 in the direction of the arrow 27A in FIG. is there.

  The latch lever 25 is supported on a portion of the latch shaft 26 that is outside the unit case 21, extends from the latch shaft 26 in the radially outward direction, and has an abutment pin 28 at its extended end. is doing. The contact pin 28 has a columnar shape, and is arranged at the extending end of the latch lever 25 in such a manner that its axis is parallel to the axis of the latch shaft 26. The latch lever 25 is linked to the latch 22 and can rotate around the axis of the latch shaft 26 in a manner interlocking with the rotation of the latch 22.

  In the latch unit 20, when the latch 22 rotates around the axis of the latch shaft 26, an unlatched state (see FIG. 6) in which the engagement groove portion 22 c is opened with respect to the striker entry groove 21 a formed in the unit case 21, and the striker The engagement groove portion 22c is displaced to the latched state with respect to the entry groove 21a. Further, in the latched state, the ratchet 23 is engaged in a claw portion 22a located in the back of the striker entry groove 21a (see FIG. 7), and the ratchet 23 is located in the front side of the striker entry groove 21a. There are two modes: a fully latched state engaged with 22b.

  When the latch unit 20 is in the half latched state with the striker S engaged, the slide door D is in a semi-closed state with respect to the vehicle body B, and the latch unit 20 is engaged with the striker S. Each dimension is set so that the slide door D is fully closed with respect to the vehicle main body B when it is in the fully latched state. Further, in the present embodiment, when the latch unit 20 is in the unlatched state, the contact pin 28 of the latch lever 25 is disposed at a position farthest from the striker entry groove 21a on the rearmost side of the vehicle. As the latch state and the full latch state are reached, the contact pin 28 gradually moves forward in the vehicle and gradually approaches the striker entry groove 21a.

  1 is a latch sensor for detecting the rotational displacement of the latch 22 with respect to the unit case 21.

  As shown in FIGS. 3 and 4, the door latch device 1 is provided with a support pin 31 at a bent portion 11 provided at an end of the base plate 10 at the rear of the vehicle, and via the support pin 31. The open lever 30 is supported so as to be swingable about the axis of the support pin 31. The bent portion 11 is a standing portion that is bent from the bent portion on the vehicle rear side toward the vehicle outer side in the base plate 10. The bearing pin 31 is arranged in such a manner that its axis is along the vertical direction of the vehicle at the tip of the bent portion 11.

  As shown in FIG. 3, the open lever 30 includes a weight support portion 30 a, a link connection portion 30 b, and a pressing piece portion 30 c that are integrally formed. The weight support portion 30a is a portion extending from the axial center of the support pin 31 toward the front of the vehicle in FIG. 3, and supports a cylindrical weight 32 at the extended end portion. The link connecting portion 30b extends from the axis of the support pin 31 toward the rear of the vehicle in FIG. 3 and then extends toward the inside of the vehicle. The intermediate portion of the link connecting portion 30b is bent so as to protrude downward from the vehicle, and one end portion of the wire cable W is held on the lower end surface thereof. 2, the other end of the wire cable W is connected to the control unit CU, and the inside handle IH and the outside handle OH (see FIGS. 10 and 11) of the slide door D via the control unit CU. ). As shown in FIGS. 1 and 3, the pressing piece portion 30c is a portion extending from the meeting portion of the weight support portion 30a and the link connection portion 30b toward the upper side of the vehicle. 3, the pressing piece 30c is engaged with the ratchet lever 24 of the latch unit 20 described above when the open lever 30 swings counterclockwise around the axis of the support pin 31 in FIG. Accordingly, the ratchet 23 can be rotated in the direction away from the latch 22 via the ratchet lever 24 (the swing of the open lever 30 in the door opening direction).

  Furthermore, the door latch device 1 includes a closer mechanism 40 on the base plate 10 as shown in FIGS. 1 and 2. The closer mechanism 40 shifts the latch unit 20 to a full latch state when the latch unit 20 is in a half latch state, and includes a closing actuator 140 and a main shaft 41.

  The closing actuator 140 includes an electric motor 141 and a pinion 142 that is rotationally driven by the electric motor 141, and the rotation axis of the pinion 142 is attached to the base plate 10 in a manner along the left-right direction of the vehicle. It is provided.

  The main shaft 41 is disposed in a portion of the base plate 10 located between the latch unit 20 and the pinion 142, and its axis is relative to the axis of the support pin 31, which is the swing axis of the open lever 30. So that it is almost perpendicular. The main shaft 41 is provided with a sector gear (input member) 240, a close plate (output member) 340, and a cancel plate (cancel member) 440.

  The sector gear 240 has a fan-shaped flat plate centered on the axis of the main shaft 41, and can rotate about the axis of the main shaft 41 in the directions of arrows 41A and 41B in FIG. The sector gear 240 has a tooth portion 241 on the outer peripheral surface thereof and a guide hole 242 in a fan-shaped portion. The tooth portion 241 constitutes a part of the gear and meshes with the pinion 142 of the closing actuator 140. The guide hole 242 extends in an arc shape around the axis of the main shaft 41 from the slide groove 242a extending in the radial direction around the axis of the main shaft 41, and from the portion adjacent to the main shaft 41 in the slide groove 242a. It has a relief groove portion 242b to be formed, and is formed as a closed notch in the sector portion of the sector gear 240. The initial state of the sector gear 240 is the most rotated state in the direction of the arrow 41B around the axis of the main shaft 41 in FIG. Reference numeral 42 in FIG. 2 is a sector sensor for detecting that the sector gear 240 is in the initial state.

  The close plate 340 extends upward from the axial center of the main shaft 41 toward the rear of the vehicle. The close plate 340 includes a contact piece 341 at the extending end of the base that forms a flat plate shape. A pin relief groove 342 is provided at a portion of the sector gear 240 that faces the guide hole 242. The abutting piece 341 is a portion extending in an inclined manner from the end of the base in a manner of gradually separating from the base plate 10. The contact piece 341 contacts the contact pin 28 of the latch lever 25 when the latch unit 20 is in a half-latched state and rotates from this state around the axis of the main shaft 41 in the direction of the arrow 41A. Further, the latch unit 20 can be shifted to the fully latched state via the contact pin 28. The pin relief groove 342 extends in the radial direction with the axis of the main shaft 41 as the center. When the sector gear 240 and the close plate 340 are rotated most in the direction of the arrow 41B in FIG. It is formed at a position facing 242a. Between the close plate 340 and the base plate 10, a return spring 343 for maintaining the close plate 340 at the most rotated position in the arrow 41B direction in FIG. 1 is interposed.

  The cancel plate 440 is a flat plate member that extends from an upper part in front of the vehicle to a lower part in the rear of the vehicle around the axis of the main shaft 41 in FIG. And a shaft escape groove 442 and an engagement groove 443. The connection pin 441 extends along the axis of the main shaft 41 and is provided in such a manner as to penetrate the pin escape groove 342 of the close plate 340 and the guide hole 242 of the sector gear 240. The shaft escape groove 442 extends from the axis of the main shaft 41 toward the axis of the connection pin 441, and the main shaft 41 can be relatively slid along the extending direction. When the main shaft 41 is slid relative to the shaft escape groove 442, the connection pin 441 slides on the pin escape groove 342 of the close plate 340. When the cancel plate 440 is most rotated in the direction of the arrow 41B in FIG. 1, the engagement groove 443 extends from a portion located below the main shaft 41 to a portion located behind the vehicle with the axis of the main shaft 41 as the center. An arc-shaped notch located between them. The width of the engagement groove 443 along the radial direction of the cancel plate 440 is substantially the same as the extension length of the shaft escape groove 442.

  The cancel plate 440 is provided with an urging spring (urging means) 444 and a meat portion 445. The biasing spring 444 is interposed between the connection pin 441 and the base plate 10, and the connection pin 441 is always located at the most radially outward portion of the slide groove 242 a in the guide hole 242 of the sector gear 240 (the engagement position of the cancel plate 440. ). The waste portion 445 is for adjusting the position of the center of gravity of the cancel plate 440 and is configured by increasing the length in the radial direction from the axis of the main shaft 41. In the present embodiment, the cancel plate 440 is in the initial state, and the connection pin 441 is provided at a position above the main shaft 41 in a state where the connection pin 441 is positioned at the position that is the most radially outward of the slide groove portion 242a. In both cases where an inertial force is applied forward and an inertial force is applied downward in the vehicle, the cancel plate 440 is applied with a moment in the direction of the arrow 41B around the axis of the main shaft 41 in FIG. It is set to. The thin portion 445 is a flat plate portion integrated with the cancel plate 440 formed in a flat plate shape, and does not increase the size of the cancel plate 440 along the axial direction of the main shaft 41.

  Further, the closer mechanism 40 includes a fail-safe lever 50 at a position below the main shaft 41. The fail safe lever 50 is disposed on the bracket 12 provided on the base plate 10 so as to be swingable in the directions of arrows 51A and 51B in FIG. The lever pin 51 is provided so as to be parallel to the main shaft 41, and supports the fail-safe lever 50 at a portion on the vehicle outer side than the cancel plate 440. The fail safe lever 50 extends downward toward the rear of the vehicle with the axis of the lever pin 51 as the center, and supports one end of the linkage link 60 at the extended end. The linkage link 60 extends along the front-rear direction of the vehicle, and the other end is connected to the tip of the link connecting portion 30b in the open lever 30, as shown in FIGS.

  As shown in FIGS. 1 and 2, an engagement pin 52 is provided at the proximal end portion of the fail safe lever 50. The engagement pin 52 is provided in such a manner as to penetrate the engagement groove 443 from a portion of the cancel plate 440 facing the engagement groove 443, and the fail safe lever 50 is in the direction of the arrow 51B around the axis of the lever pin 51 in FIG. Is configured to engage with the inner wall surface of the engagement groove 443 provided in the cancel plate 440.

  In the door latch device 1 configured as described above, when the slide door D is in the opened state, the latch unit 20 is in the unlatched state as shown in FIG. In the closer mechanism 40, the urging force of the return spring 343 and the urging spring 444 holds the sector gear 240, the close plate 340, and the cancel plate 440 in a state of being most rotated in the direction of the arrow 41B in FIG. The connection pin 441 is maintained at the engagement position in the outermost radial direction of the slide groove 242 a in the guide hole 242 of the sector gear 240. Accordingly, when the sector gear 240 rotates, the connection pin 441 contacts and engages the inner wall surface of the slide groove 242a in the guide hole 242, and thus the close plate 340 and the cancel plate 440 rotate in the same direction ( Power transmission state). Further, the fail safe lever 50 is in a state of being most rotated in the direction of the arrow 51A in FIG.

  When the sliding door D is operated to close the vehicle body B from this state, in the latch unit 20, the striker S of the vehicle body B relatively enters the engagement groove portion 22 c of the latch 22 and comes into contact with the latch 22. The latch 22 rotates along the direction of the arrow 26A against the urging force of a latch spring (not shown), and the ratchet 23 eventually locks the claw portion 22a of the latch 22 as shown in FIG. Latched. When the latch unit 20 is in a half-latch state, the slide door D is in a half-closed state with respect to the vehicle body B. In addition, because of the half latch state, the latch lever 25 that swings integrally with the latch 22 also rotates in the direction of the arrow 26 </ b> A, and the contact pin 28 of the latch lever 25 moves to the contact piece 341 of the close plate 340. It will be placed in the movement area.

  The above-described half latch state of the latch unit 20 is detected by the latch sensor 29. When the half latch state is detected by the latch sensor 29, the electric motor 141 of the closing actuator 140 is driven to rotate the pinion 142, whereby the sector gear 240 meshing with the pinion 142 is rotated in the direction of arrow 41A in FIG. To do. The rotation of the sector gear 240 is detected by the sector sensor 42.

  When the sector gear 240 rotates, as shown in FIG. 8, the close plate 340 and the cancel plate 440 in the power transmission state rotate in the same arrow 41 </ b> A direction, and eventually the contact piece 341 of the close plate 340 moves the latch lever 25. As a result, the latch 22 rotates in the direction of the arrow 26A and the latch unit 20 shifts to the full latch state. As a result, the semi-closed slide door D moves in the door closing direction via the striker S, and the vehicle main body B is fully closed. When the latch unit 20 is in a fully latched state, this is detected by the latch sensor 29, and the closing actuator 140 rotates in the reverse direction, so that the sector gear 240, the closing plate 340, and the canceling plate 440 are each in the direction of arrow 41B in FIG. Rotate to. Thereafter, when the sector gear 240 reaches the initial state, this is detected by the sector sensor 42 and the closing actuator 140 stops.

  Even when the cancel plate 440 rotates during the above-described operation, the inner wall surface of the engagement groove 443 and the engagement pin 52 of the fail safe lever 50 do not contact each other, and the fail safe lever 50 swings. Never do.

  If the inside handle IH or the outside handle OH is opened when the latch unit 20 is in the half latch state or the full latch state, the opening operation is transmitted to the wire cable W via the control unit CU, The open lever 30 swings around the axis of the support pin 31 in the door opening direction, and the state shown in FIG. 3 is changed to the state shown in FIG. When the open lever 30 swings in the door opening direction, the pressing piece 30c engages with the ratchet lever 24 of the latch unit 20, and the contact engagement state of the ratchet 23 with the latch 22 is released. The latch 22 is brought into an unlatched state by an elastic force (not shown). As a result, the meshing state between the slide door D and the striker S is released, and the slide door D can be opened and moved.

  On the other hand, when the open lever 30 swings in the door opening direction by the opening operation of the inside handle IH or the outside handle OH, as shown in FIG. 9, the fail safe lever 50 is moved in the direction of the arrow 51B via the linkage link 60. Rotate. When the fail safe lever 50 rotates in the direction of the arrow 51B, the engagement pin 52 engages with the inner wall surface of the engagement groove 443, and then the cancel plate 440 is against the elastic force of the biasing spring 444 and the shaft escape groove 442. Is slid in the lower right direction in FIG. As a result, the connection pin 441 of the cancel plate 440 moves to the main shaft 41 side in the slide groove 242a in the guide hole 242 of the sector gear 240 and faces the escape groove 242b of the guide hole 242. Even when rotated in the direction of the arrow 41A, the connection pin 441 and the inner wall surface of the guide hole 242 do not come into contact with each other (non-transmission state). Therefore, even when the sector gear 240 is rotated in the direction of the arrow 41A in the figure by driving the closing actuator 140, the opening lever 30 swings in the opening direction by the opening operation of the inside handle IH or the outside handle OH. Then, thereafter, the rotation of the sector gear 240 is not transmitted to the close plate 340 and the cancel plate 440, and the transition of the latch unit 20 from the half latch state to the full latch state is immediately stopped. As described above, the latch unit 20 enters the unlatched state when the inside handle IH or the outside handle OH is opened. Accordingly, even when a foreign object such as clothing is sandwiched between the vehicle main body B and the slide door D while the latch unit 20 transitions from the half latch state to the full latch state, the latch unit 20 is disposed on the slide door D. This can be released by opening the inside handle IH or the outside handle OH.

  As described above, according to the door latch device 1, since the open lever 30 and the fail safe lever 50 of the closer mechanism 40 are linked by the linkage link 60, the door opening operation is transmitted only to the open lever 30. If the wire cable W is connected, the closer mechanism 40 can be shifted to the non-power transmission state. As a result, a wire cable for individually transmitting the opening operation to the closer mechanism 40 becomes unnecessary, and it becomes possible to reduce the number of parts and the manufacturing cost.

  By the way, in the door latch device 1 in which the open lever 30 and the fail safe lever 50 of the closer mechanism 40 are linked by the linkage link 60 as described above, the operation of the closer mechanism 40 affects the operation of the open lever 30. For example, when an inertial force is applied to the vehicle by performing a sudden start, a sudden stop, a sharp curve travel, or a rough road travel, the closer mechanism 40 operates and the latch 22 and the ratchet 23 via the open lever 30 are operated. There is a possibility of affecting the engagement state.

  However, according to the door latch device 1, first, the main shaft 41 and the lever pin 51 extend along the left-right direction of the vehicle. Therefore, the closer mechanism 40 even when the left-right inertial force acts on the vehicle. There is no possibility that the operation of the closer mechanism 40 will affect the latch unit 20 such as the engagement state between the latch 22 and the ratchet 23.

  On the other hand, when an inertial force is applied toward the rear of the vehicle, or when an inertial force is applied toward the upper side of the vehicle, the fail-safe lever 50 itself is centered on the axis of the lever pin 51 in the direction of the arrow 51A in FIG. Therefore, the open lever 30 does not swing in the door opening direction. The cancel plate 440 receives a moment in the direction of arrow 41A in FIG. 1 about the axis of the main shaft 41, but the engagement groove 443 is swung with respect to the engagement pin 52 of the failsafe lever 50. Therefore, the fail safe lever 50 does not swing. As a result, the operation of the closer mechanism 40 does not affect the latch unit 20 such as the engagement state between the latch 22 and the ratchet 23 due to the inertial force toward the rear or upward of the vehicle.

  Further, when an inertial force is applied toward the front of the vehicle, or when an inertial force is applied toward the lower side of the vehicle, the fail-safe lever 50 itself is in the direction of the arrow 51B in FIG. Moment acts on. When the fail safe lever 50 swings due to this moment, the open lever 30 swings in the door opening direction via the linkage link 60. However, when an inertial force is applied toward the front of the vehicle, a moment is applied to the cancel plate 440 in the direction of the arrow 41B in FIG. This moment, combined with the elastic force of the urging spring 444, prevents the cancel plate 440 from sliding along the shaft escape groove 442 in the lower right direction in FIG. It is. As a result, the swing in the arrow 51B direction of the fail safe lever 50 that is in contact with and engaged with the inner wall surface of the engagement groove 443 via the engagement pin 52 is prevented, and the swing of the open lever 30 in the door opening direction is prevented. Will be blocked. Eventually, the operation of the closer mechanism 40 does not affect the latch unit 20 such as the engagement state between the latch 22 and the ratchet 23 even by the inertial force toward the front or the lower side of the vehicle.

  As described above, the closer mechanism 40 of the door latch device 1 causes the inertial force when the inertial force that swings the open lever 30 in the door opening direction is applied in a state where the cancel plate 440 is disposed at the engagement position. Since the center of gravity of the cancel plate 440 is set so that a moment about the rotation axis that maintains the engagement position is applied to the cancel plate 440, the closer mechanism 40 is opened even when an inertial force is applied to the vehicle, for example. The lever 30 does not swing in the door opening direction and does not affect the latch unit 20.

  In addition, by increasing the radial length from the axis of the main shaft 41 to the cancel plate 440, a sunk portion 445 is provided, and the sunk portion 445 adjusts the axial center position of the cancel plate 440. For this reason, it is possible to make the protruding dimension from the base plate 10 as small as possible as compared with the case where a weight such as a counterweight is separately provided to adjust the position of the center of gravity. That is, in the present embodiment, it is possible to reduce the installation space along the left-right direction of the vehicle. Accordingly, it is possible to reduce the size of the slide door D to be attached to the door latch device 1 along the left-right direction of the vehicle. In particular, in the slide door D to which the present embodiment is applied, the door latch device 1 and the window glass WG (see FIG. 11) are generally arranged so as to overlap in the left-right direction of the vehicle. For this reason, if the size of the door latch device 1 is reduced, the above-described effects appear more remarkably, such as no restriction on the position of the window glass WG.

  In the above-described embodiment, the sliding door D that is slidably disposed along the front-rear direction on the side of the vehicle main body B is applied. However, the closer that shifts the latch unit in the half-latch state to the full-latch state. As long as it is a door provided with a mechanism, it can be applied to other things. In this case, the opening / closing direction of the door body does not need to be a slide, and the door body can be applied to an opening / closing direction by a hinge.

  In the above-described embodiment, the axis of the lever pin 51 serving as the pivot axis of the fail safe lever 50 and the axis of the support pin 31 serving as the pivot axis of the open lever 30 are perpendicular to each other. Although the intersection angle is set, the present invention is not limited to this. Specifically, even when an inertial force that swings the open lever 30 is applied, if the inertial force is set so that a moment that swings the fail-safe lever 50 does not act, it does not necessarily need to be a right angle.

  Furthermore, in the above-described embodiment, the cancel plate 440 is provided with the meat portion 445 by increasing the length in the radial direction from the axis of the main shaft 41, and the shaft center position of the cancel plate 440 is provided by the meat portion 445. However, the present invention is not necessarily limited to this, and if an installation space permits, it is possible to attach a weight such as a counterweight as in the conventional case.

It is the conceptual diagram which looked at the door latch apparatus to which the power closer apparatus of the vehicle door body which is embodiment of this invention was applied from the vehicle outer side. It is the conceptual diagram which looked at the door latch apparatus shown in FIG. 1 from the vehicle inside. It is the conceptual diagram which looked at the principal part of the door latch apparatus shown in FIG. 1 from upper direction. It is the conceptual diagram which looked at the principal part of the door latch apparatus shown in FIG. 1 from upper direction. It is a conceptual diagram of the latch unit applied to the door latch apparatus shown in FIG. It is a principal part conceptual diagram which shows the unlatch state of the door latch apparatus shown in FIG. It is a principal part conceptual diagram which shows the half latch state of the door latch apparatus shown in FIG. It is a principal part conceptual diagram which shows the full latch state of the door latch apparatus shown in FIG. It is a principal part conceptual diagram which shows the non-operation state of the closer mechanism applied to the door latch apparatus shown in FIG. It is the top view which showed notionally the vehicle used as the application object of the door latch apparatus shown in FIG. 2 is a left side view conceptually showing a vehicle to which the door latch device shown in FIG. 1 is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door latch apparatus 10 Base plate 20 Latch unit 23 Ratchet 24 Ratchet lever 30 Open lever 40 Closer mechanism 41 Main shaft 50 Fail safe lever 51 Lever pin 52 Engagement pin 60 Linking link 140 Actuator 240 Sector gear 340 Close plate 440 Cancel plate 444 Energizing Spring 445

Claims (3)

While closer mechanism is to shift the latch on the half-latched state to the fully-latched state by transmitting power to the latch of the latch unit via a closer mechanism when the closing actuator driven when in the power transmitting state,
By swinging the open lever in the door opening direction when the door is opened, the latch unit is released in the direction away from the latch , and the latch state is released and the closer mechanism is shifted to the non-transmission state. A power closer device for a vehicle door body that cuts off power transmission from the closing actuator to the latch unit,
The latch unit has a latch on one side with respect to the striker entry groove, and a ratchet on the other side.
Closer mechanism comprises a linking mechanism that links between the open lever, while Ru is shifted to the non-transmission state by the swinging of the door opening direction of the open lever, abutment pieces which operates when a half-latched state It is made to shift to the full latch state by engaging with the latch, and the linking means is arranged with the open lever on the side where the ratchet is arranged with reference to the striker entry groove, and is latched with reference to the striker entry groove. Place the contact piece on the side where
Furthermore, when the inertial force that swings the open lever in the door opening direction is applied during the power transmission state, the center of gravity position is set so that the force that maintains the power transmission state is applied by this inertial force. A power closer device for a vehicle door body. The closer mechanism is
An input member that operates when the closing actuator is driven;
An output member that shifts the latch unit to the full latch state by engaging the latch unit in the half latch state when moved from the neutral position to the full latch position;
When the closing actuator is driven by engaging the input member and the output member between the input member and the output member and engaging them, the output member disposed at the neutral position is fully latched. A cancel member that releases the engaged state of the input member and the output member when moved to a predetermined cancel position,
Biasing means for biasing the cancel member so as to maintain the engagement position at all times;
The open lever is arranged so that it can swing around an axis that has a predetermined crossing angle with respect to the swing axis of the open lever, and is linked to the open lever by a linkage link so that the open lever swings in the door opening direction. A fail-safe lever configured to move the cancel member to the cancel position against the biasing force of the biasing means by swinging and engaging the cancel member when moved.
The cancel member is arranged to be rotatable about a rotation axis parallel to the swing axis of the fail safe lever, and to be slidable along a slide direction intersecting the swing axis of the fail safe lever, By sliding along the sliding direction, it is displaced between the engaging position and the canceling position, and when the closing actuator is driven in the state where it is arranged at the engaging position, it rotates in one direction around the rotation axis. By moving the output member arranged at the neutral position to the full latch position,
Further, when an inertial force that swings the open lever in the door opening direction is applied in a state where the canceling member is disposed at the engagement position, the inertial force causes the rotation member around the rotation axis that maintains the engagement position to the cancellation member. The power closer device for a vehicle door according to claim 1, wherein the center of gravity of the cancel member is set so that a moment acts.   The cancel member is a flat plate-like member extending in the radially outward direction around the rotation axis, and the center of gravity is adjusted by increasing or decreasing the radial length from the rotation axis. The power closer device for a vehicle door according to claim 2.

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