JP6015465B2 - Vehicle door lock device - Google Patents

Description

  The present invention relates to a vehicle door lock device.

  5 and 6 of Patent Document 1 disclose a conventional vehicle door lock device. This vehicle door lock device is provided in a door that opens and closes an opening of a vehicle body, and has a housing having an entrance through which a striker fixed to the vehicle body enters, and is swingably provided in the housing, and engages the striker in the entrance. And a fork that switches to an unlatched state in which the striker is unlocked in the entrance. In addition, this vehicle door lock device is provided in a housing so as to be swingable around a pole axis, and a pole that can fix or open a swing of a fork and a pole that is displaced in conjunction with a door handle opening operation. Switching means for switching the fork from the latched state to the unlatched state. An inertia lever is provided in the housing. The inertia lever is swingably supported by a spherical bearing fixed to the housing. The inertia lever is inserted through a donut-shaped wall provided at the pole at the upper end, and a locking portion is fixed to the uppermost end of the inertia lever.

  In this vehicle door lock device, when an impact or the like acts on the vehicle with the door closing the opening of the vehicle body, the inertia lever swings due to the inertial force. In this case, when the door handle or the switching means is displaced due to an impact or the like and acts on the pole, and the pole tries to swing around the pole axis, the latching portion of the inertia lever stops against the donut-shaped wall surface of the pole. And restrain the swing of the pole. As a result, the pole cannot release the swing of the fork, and the fork does not switch to the unlatched state. Thus, the conventional vehicle door lock device prevents the door from opening unexpectedly during an impact or the like.

Japanese Patent Publication No.55-27948

  However, in the conventional vehicle door lock device, when the inertial force acts on the inertial lever when the door closes the opening of the vehicle body, the inertial lever swings uniformly regardless of the magnitude of the inertial force. For this reason, the inertia lever easily collides with the donut-shaped wall surface of the pole. As a result, when the door closes the opening of the vehicle body, the inertia lever interferes with the operation of the pole, and it is difficult for the fork to switch to the latched state, which may cause a problem that the door cannot reliably close the opening of the vehicle body.

  The present invention has been made in view of the above-described conventional situation, and can reliably prevent the door from opening unexpectedly at the time of impact or the like, and when the door closes the opening of the vehicle body, An object to be solved is to provide a vehicle door lock device that can be closed.

A vehicle door lock device according to the present invention is provided in a door that opens and closes an opening of a vehicle body, and a housing having an entrance through which a striker fixed to the vehicle body enters,
A fork that is swingably provided in the housing and switches to a latched state in which the striker is locked in the entrance, or an unlatched state in which the striker is released in the entrance.
A pole provided in the housing so as to be swingable around a pole axis, and a pole capable of fixing or releasing the swing of the fork;
A vehicle door lock device comprising: switching means for displacing in conjunction with an opening operation of the door handle, acting on the pawl, and switching the fork from the latched state to the unlatched state,
The housing has an inertia lever that is swingable from a first position to a second position about a pivot extending in a direction orthogonal to the direction of advancement / retraction to the opening, and holds the inertia lever at the first position. And an urging member that exerts an urging force is provided,
The biasing member holds the inertial lever in the first position below a set value greater than a first inertial force that can act on the inertial lever due to an impact when the door closes the opening. The biasing force is set to allow the inertial lever to swing to the second position when a second inertial force exceeding a set value acts on the inertial lever;
The inertia lever is configured to avoid contact with the pawl in the first position, and to contact and restrain the pawl in the second position regardless of the displacement of the switching means. It is characterized by being.

  In the vehicle door lock device of the present invention, the first inertial force can act on the inertial lever due to an impact when the door closes the opening of the vehicle body. In this case, the biasing member holds the inertia lever in the first position below a set value larger than the first inertia force. For this reason, an inertia lever does not contact | abut to a pole, and does not disturb the operation | movement of a pole. As a result, the door can reliably close the opening of the vehicle body.

  Further, in this vehicle door lock device, the second inertial force exceeding the set value can act on the inertial lever at the time of a collision with the vehicle. In this case, the biasing member allows the inertia lever to swing to the second position. For this reason, the inertia lever swings from the first position to the second position around the pivot extending in the direction orthogonal to the direction of advancement / retraction to the opening. Then, even if the door handle is displaced due to an impact or the like, and the switching means is accordingly displaced, the inertia lever contacts the pole at the second position and restrains the pole. As a result, even if the switching means is displaced unexpectedly, the door can be prevented from opening.

  Therefore, the vehicle door lock device according to the present invention can reliably prevent the door from opening unexpectedly at the time of impact or the like, and can reliably perform the closing when the door closes the opening of the vehicle body. .

  Further, in this vehicle door lock device, the inertia lever restrains the pole only at the time of a collision or the like. For this reason, this vehicle door lock device is provided with an inertia lever on one of the switching means and the pole, and the inertia lever is in contact with the other of the switching means and the pole every time the door is opened. The durability of the inertia lever and its support can be improved.

  The pivot can extend in a direction perpendicular to the pole axis. According to this configuration, it is easy to lay out the inertia lever so that the outer shape of the vehicle door lock device is small when viewed from the pole axis direction.

  The pivot can extend in a direction substantially parallel to the pole axis. According to this configuration, it is easy to lay out the inertia lever so that the thickness of the vehicle door lock device in the pole axis direction becomes small.

  The housing preferably has a base plate in which an entrance is formed, a back plate facing the base plate, and a guide base assembled between the base plate and the back plate. Moreover, it is preferable that the fork and the pole are swingably supported while being sandwiched between the base plate and the back plate. The inertia lever and the biasing member are preferably provided on any one of the base plate, the back plate, and the guide base. According to such a specific configuration, the effects of the present invention can be reliably achieved.

  The switching means may comprise a switching lever that is swingably provided in the housing, and a connecting member having one end connected to the door handle and the other end connected to the switching lever. The connecting member may be, for example, a rigid rod or a flexible cable.

  The switching lever is displaced to a locking position where the latched fork cannot be switched to the unlatched state, and is moved to a locked position where the latched fork can be switched to the unlatched state. It is preferable to have a movable mechanism that is displaced to the unlocking position where it can act on.

  In the case where the switching lever has a movable mechanism for locking or unlocking, if an inertia lever is further provided on the switching lever, a plurality of mechanisms are concentrated on a single member, and the apparatus configuration is likely to be complicated. In this regard, according to the above configuration, the inertia lever is not provided in the switching lever having the movable mechanism, but the inertia lever is provided in the housing. In other words, since the plurality of mechanisms are provided in a plurality of members, the device is provided. Simplification of the configuration can be realized.

  Further, the switching means may be a connecting member having one end connected to the door handle and the other end connected to the pole. The connecting member may be, for example, a rigid rod or a flexible cable.

1 is a side view of a vehicle door lock device according to a first embodiment. 1 is a perspective view of a vehicle door lock device according to a first embodiment. 1 is an exploded perspective view of a vehicle door lock device according to a first embodiment. FIG. 2 is a schematic bottom view of the vehicle door lock device according to the first embodiment when viewed from the direction of arrow A in FIG. 1. FIG. 5 is a schematic bottom view similar to FIG. 4 according to the vehicle door lock device of the first embodiment. FIG. 3 is a partial top view of the vehicle door lock device according to the first embodiment when viewed from the direction of arrow B in FIG. 1. FIG. 5 is a schematic bottom view similar to FIG. 4 according to the vehicle door lock device of the first embodiment. It is a fragmentary sectional view which shows the CC cross section of FIG. 6 concerning the vehicle door lock device of Example 1. FIG. 6 is a graph illustrating a magnitude relationship among a first inertial force, a second inertial force, and a set value according to the vehicle door lock device of the first embodiment. FIG. 5 is a schematic bottom view similar to FIG. 4 according to the vehicle door lock device of the first embodiment. It is a side view of the door lock device for vehicles of Example 2. It is a disassembled perspective view of the vehicle door lock device of Example 2. FIG. 12 is a schematic bottom view of the vehicle door lock device according to the second embodiment when viewed from the direction of arrow D in FIG. 11. FIG. 12 is a schematic bottom view of the vehicle door lock device according to the second embodiment when viewed from the direction of arrow E in FIG. 11. FIG. 14 is a schematic bottom view similar to FIG. 13 according to the vehicle door lock device of the second embodiment. FIG. 14 is a schematic bottom view similar to FIG. 13 according to the vehicle door lock device of the second embodiment. It is a perspective view of the door lock device for vehicles of Example 3. It is a top view of the door lock device for vehicles of Example 3. It is a disassembled perspective view of the vehicle door lock device of Example 3. FIG. 18 is a schematic bottom view of the vehicle door lock device according to the third embodiment when viewed from the direction of arrow F in FIG. 17. FIG. 21 is a schematic bottom view similar to FIG. 20 according to the vehicle door lock device of the third embodiment.

  Embodiments 1 to 3 embodying the present invention will be described below with reference to the drawings.

Example 1
As shown in FIG. 1, the vehicle door lock device 1 of the first embodiment (hereinafter simply referred to as “door lock device 1”) is applied to a vehicle such as an automobile, a bus, or an industrial vehicle. The door lock device 1 is disposed on the lower edge side of the tailgate 2 that opens and closes the opening 9A of the vehicle body 9. The tailgate 2 is an example of the door of the present invention. The door lock device 1 can also be provided on a side door that opens and closes in the left-right direction with respect to the vehicle body 9.

  In FIG. 1, only the lower end edge of the opening 9A is shown, but the opening 9A is largely opened in a substantially rectangular shape at the rear part of the vehicle body 9, and communicates the outside of the vehicle and the inside of the vehicle body 9 in the front-rear direction. In FIG. 1, the right side of the page is the front side of the vehicle, and the left side of the page is the rear side of the vehicle. In FIG. 1, the front side of the page is the right side of the vehicle, and the back side of the page is the left side of the vehicle. Then, the front-rear direction, the up-down direction, and the left-right direction shown in the drawings after FIG. 2 are all displayed in correspondence with FIG.

  Although not shown, the upper end edge of the tailgate 2 is swingably supported by the vehicle body 9 by a hinge. As shown in FIG. 1, the tailgate 2 closes the opening 9 </ b> A when the lower end edge of the tailgate 2 hangs downward. And although illustration is abbreviate | omitted, the tail gate 2 opens the opening 9A when the lower end edge of the tail gate 2 swings backward and obliquely upward. A substantially “U” -shaped striker 99 is projected from the lower end edge of the opening 9 </ b> A toward the lower end edge of the tailgate 2.

  As shown in FIGS. 1 to 3, the door lock device 1 includes a housing 90, a fork 11, a pole 12, a switching mechanism 100, a locking / unlocking lever 180, and an electric actuator 190.

  As shown in FIG. 3, the housing 90 includes a base plate 91 and a back plate 92 each made of a pressed steel plate that has been pressed, and a guide base that is a resin block member assembled between the base plate 91 and the back plate 92. 93.

  The base plate 91 includes a concave portion 91A that is recessed downward, and a pair of left and right attachment portions 91B that extend substantially horizontally from the left and right sides of the concave portion 91A. The recess 91A is formed with an entrance 98 that is deeply cut out in a groove shape from the front to the rear of the vehicle. When the door lock device 1 moves as the tailgate 2 opens and closes, the striker 99 relatively enters the entrance 98 as shown in FIGS.

  As shown in FIGS. 3 and 4, forks 11 and poles 12 are disposed on the left and right of the entrance 98 in the recess 91A. In FIG. 4, the entrance 98 is located on the front side of the paper with respect to the fork 11 and the pole 12, and therefore, the two-dot chain line is used for illustration. The same applies to FIG.

  As shown in FIG. 3, the back plate 92 includes a substantially flat lid portion 92A, a pair of left and right mounting portions 92B extending substantially horizontally from the left and right sides of the lid portion 92A, and a substantially vertical position from the rear edge of the lid portion 92A. And a standing wall portion 92C rising up. When the back plate 92 is assembled to the base plate 91 from above with the guide base 93 interposed therebetween, the lid portion 92A covers the concave portion 91A, and the attachment portion 92B overlaps the attachment portion 91B.

  The switching mechanism 100 and the locking / unlocking lever 180 are assembled on the rear surface side of the standing wall portion 92C. Moreover, as shown in FIG. 1, the electric actuator 190 is assembled | attached to the rear surface side of the standing wall part 92C. Then, both the attachment portions 91 </ b> B and 92 </ b> B are fastened to the inner frame of the tailgate 2, whereby the door lock device 1 is fixed to the lower end edge of the tailgate 2.

  As shown in FIG. 4, the fork 11 is swingably supported by a fork swing shaft 11 </ b> S disposed on the left side of the entrance 98. The fork 11 is biased by a coil spring (not shown) so as to swing in the direction D1 around the fork swing shaft 11S.

  The fork 11 has a rear convex portion 11A and a front convex portion 11B. The striker 99 that has entered the entrance 98 is accommodated in the concave portion 11C formed between the rear convex portion 11A and the front convex portion 11B. In the state shown in FIG. 4, the fork 11 holds the striker 99 at the bottom of the entrance 98. A latch surface 11D that can come into contact with a stopper surface 12A, which will be described later, is formed on the tip side facing the pole 12 of the rear convex portion 11A.

  The pole 12 is disposed on the right side of the entrance 98 and is supported by a pole swing shaft 12S having the pole axis X12 as an axis so as to be swingable. The pole 12 is urged by a coil spring (not shown) so as to swing around the pole axis X12 in the direction D2, and normally maintains the posture shown in FIG.

  A stopper surface 12 </ b> A is formed on the pole 12. The stopper surface 12A is a curved surface that curves in an arc shape around the pole axis X12, and is formed to face the above-described latch surface 11D. The arc constituting the stopper surface 12A is interrupted on the fork 11 side, and a sliding surface 12C extending from the arc to the pole swing shaft 12S side is formed.

  The pole 12 has a contact portion 12P adjacent to the stopper surface 12A. The contact portion 12P protrudes away from the pole swing shaft 12S. As shown in FIGS. 2 and 3, etc., a constrained portion 12M that is a convex portion protruding upward is formed on the upper surface of the contact portion 12P.

  As shown in FIG. 4, when the fork 11 holds the striker 99 at the bottom of the entrance 98, the stopper surface 12A of the pole 12 comes into contact with the latch surface 11D of the rear convex portion 11A. Thus, the pole 12 fixes the fork 11 so as not to swing the fork 11 in the direction D1. As a result, the fork 11 is in a latched state for locking the tailgate 2.

  When the action portion 151 of the movable mechanism 150 described later with reference to FIG. 7 is displaced to the right from the state shown in FIG. 4 and presses the contact portion 12P as shown in FIG. 5, the pole 12 is not shown. It swings around the pole axis X12 in the direction opposite to the direction D2 while resisting the urging force of the coil spring. At this time, since the stopper surface 12A is separated from the latch surface 11D, the pole 12 opens the fork 11. For this reason, the fork 11 is swung in the direction D1 around the fork rocking shaft 11S by a biasing force of a coil spring (not shown), and the striker 99 is displaced in a direction away from the entrance 98. As a result, the fork 11 is switched to an unlatched state in which the striker 99 is not locked in the entrance 98. At this time, the tailgate 2 is displaced from a completely closed state to a slightly opened state.

  On the other hand, when the striker 99 enters the entrance 98, the fork 11 and the pole 12 operate in the opposite manner to the above-described operation. That is, when the striker 99 in the state shown in FIG. 5 enters the bottom of the entrance 98 as shown in FIG. 4, the striker 99 pushes the rear convex portion 11A and swings the fork 11 toward the original position. . At this time, the rear convex portion 11A swings while being in sliding contact with the sliding surface 12C. When the fork 11 returns to the original position, the stopper surface 12A is urged by a coil spring (not shown), swings in the direction D2, and contacts the latch surface 11D. As a result, the fork 11 returns to the latched state.

  As shown in FIGS. 1 and 2, the switching mechanism 100 includes a swing shaft 160 that is a metal multistage cylindrical shaft body, a switching lever 110 that is a metal steel plate member subjected to sheet metal pressing, a movable mechanism 150, and the like. Have

  As shown in FIGS. 2, 3, and 6, the swing shaft 160 is inserted through a shaft hole 92 </ b> H penetrating the standing wall portion 92 </ b> C. The swing shaft 160 includes a swing shaft main body 161 that protrudes rearward from the standing wall portion 92C, and a large-diameter portion 162 that is positioned in front of the standing wall portion 92C and has a larger outer diameter than the swing shaft main body 161. The swing shaft main body 161 supports the switching lever 110 so as to be swingable. A torsion coil spring 169 is attached to the large diameter portion 162. One end of the torsion coil spring 169 is locked to the standing wall portion 92 </ b> C, and the other end is locked to the switching lever 110. As a result, the torsion coil spring 169 biases the switching lever 110 in the direction D3 shown in FIG. 2, and holds the switching lever 110 in the posture shown in FIG.

  As shown in FIGS. 3 and 6, one end side of the switching lever 110 is spaced leftward with respect to the rocking shaft main body 161 and then bent forward to open the opening 92K (see FIGS. 2 and 2) of the standing wall portion 92C. 3) and extends to the front of the standing wall portion 92C, and is further bent to the left, and the left end thereof is the input portion 111. As shown in FIGS. 1 and 3, the input unit 111 is connected to a lower end 7 </ b> B of a rod 7 that extends in a bar shape in the vertical direction.

  As shown in FIG. 1, the upper end 7 </ b> A of the rod 7 is connected to the door handle 8. When the door handle 8 is operated by the occupant, the rod 7 is displaced downward, and the displacement is transmitted to the input unit 111. As a result, the switching lever 110 swings around the swing shaft main body 161 in the direction opposite to the direction D3 shown in FIG. 2 while resisting the biasing force of the torsion coil spring 169. When the door handle 8 is not operated and the rod 7 is displaced upward, the switching lever 110 is returned to the original position by the biasing force of the torsion coil spring 169. The rod 7 is an example of the “connecting member” in the present invention. The switching lever 110 and the rod 7 are an example of the “switching means” in the present invention.

  As shown in FIGS. 2 and 3, the other end side of the switching lever 110 is spaced downward with respect to the swing shaft main body 161, then bends backward, and further bends downward. Is the output unit 112.

  As shown in FIGS. 2, 3, and 6, the movable mechanism 150 is an injection molded product of a thermoplastic resin and is attached to the output unit 112. The movable mechanism 150 includes a substantially thick plate-shaped action part 151 attached to the rear surface of the output part 112 and a columnar part 152 protruding in a columnar shape from the upper side of the action part 151 to the rear.

  FIG. 2 shows a state where the movable mechanism 150 slides downward with respect to the output unit 112. In this state, the lower end side of the action portion 151 is located on the left side of the contact portion 12P of the pole 12. The position of the movable mechanism 150 shown in FIG. 4 and the position of the movable mechanism 150 shown by a two-dot chain line in FIG. 7 correspond to the position of the movable mechanism 150 shown in FIG.

  As shown in FIG. 5, the action portion 151 swings from the position shown in FIGS. 2 and 4 around the swing shaft main body 161 in the direction opposite to the direction D <b> 3 shown in FIG. 2. It is possible to press the contact portion 12P of the pole 12 by shifting to the right.

  The action portion 151 is fitted to the output portion 112 so as to be slidable in the vertical direction. Thereby, the action part 151 can be displaced from the position indicated by the two-dot chain line in FIG. 7 to the position indicated by the solid line in FIG.

  As shown in FIG. 3, the locking / unlocking lever 180 has a boss 181 that protrudes forward and is swingably supported by a shaft hole 92G that is provided on the left side of the standing wall 92C. One end side of the locking / unlocking lever 180 extends upward with respect to the boss 181, and an upper end of the locking / unlocking lever 180 is an engagement portion 182 having a bifurcated shape. The other end side of the locking / unlocking lever 180 extends downward with respect to the boss 181, and a long hole 183 extending in a circular arc shape in the left-right direction is penetrated at the lower end thereof. The cylindrical portion 152 of the movable mechanism 150 is inserted into the long hole 183.

  The electric actuator 190 shown in FIG. 1 has an electric motor and gear mechanism (not shown) inside. The electric actuator 190 has an arm (not shown) that is driven and displaced by an electric motor or a gear mechanism, and the arm is engaged with the engaging portion 182 of the locking / unlocking lever 180.

  When the occupant performs a locking operation using a remote control key or the like, an electric motor, a gear mechanism, and an arm (not shown) of the electric actuator 190 are operated to displace the engaging portion 182 to the left from the position shown in FIG. Then, the locking / unlocking lever 180 swings around the shaft hole 92G, and the elongated hole 183 is displaced rightward and upward from the position shown in FIG. For this reason, the cylindrical part 152 inserted through the long hole 183 is pulled upward. As a result, the action unit 151 slides upward with respect to the output unit 112 from the position indicated by the two-dot chain line in FIG. 7 and is displaced to the position indicated by the solid line in FIG. In this state, the lower end side of the action portion 151 is separated upward from the contact portion 12P of the pole 12. In this case, when the switching lever 110 swings around the swing shaft main body 161 in the direction opposite to the direction D3, the cylindrical portion 152 slides in the elongated hole 183 that is displaced rightward and upward from the position shown in FIG. Then, the lower end side of the action portion 151 is displaced to the right while being spaced apart upward with respect to the contact portion 12P of the pole 12. That is, the movable mechanism 150 makes the pawl 12 inoperable and makes the latched fork 11 unswitchable to the unlatched state by the locking operation.

  On the other hand, when an occupant performs an unlocking operation using a remote control key or the like, the electric actuator 190 and the locking / unlocking lever 180 operate in the reverse manner. As a result, the action unit 151 slides downward with respect to the output unit 112 from the position indicated by the solid line in FIG. 7 and returns to the position shown in FIG. 4 and the position indicated by the two-dot chain line in FIG. In this case, when the switching lever 110 swings around the swing shaft main body 161 in the direction opposite to the D3 direction, the cylindrical portion 152 slides in the long hole 183 at the position shown in FIG. The lower end side presses the contact portion 12P of the pole 12. That is, the movable mechanism 150 enables the pawl 12 to act by the unlocking operation, and enables the latched fork 11 to be switched to the unlatched state.

  Although illustration and description are omitted, the operation described above is also applied to the locking / unlocking lever 180 when the occupant inserts a key into a key cylinder (not illustrated) provided in the tailgate 2 and performs the locking / unlocking operation. Can be performed.

  Further, the door lock device 1 includes an inertia lever 130 and a torsion coil spring 139 provided on the guide base 93 as shown in FIGS. 2, 3, 6 and 8. The torsion coil spring 139 is an example of the “biasing member” in the present invention.

  More specifically, in the guide base 93, a concave portion 93A that is recessed in a substantially rectangular shape from the rear surface side and the upper surface side toward the front and the lower side is formed in a portion positioned above the contact portion 12P of the pole 12. Yes.

  An inertia lever swing shaft 130S is assembled above the recess 93A. The inertia lever swing shaft 130S has a pivot axis X1 extending in a direction (namely, left-right direction) orthogonal to a direction (namely, front-rear direction) moving forward and backward to the opening 9A.

  The inertia lever 130 is supported by the inertia lever swing shaft 130S so as to be swingable around the pivot axis X1 in the recess 93A.

  The inertia lever 130 is made of, for example, a zinc alloy die-cast, and has a mass body 131 that extends downward in a block shape from the pivot X1 and a restraining portion that protrudes rearward from the mass body 131 and then hangs downward. 132.

  The torsion coil spring 139 is mounted on the inertia lever swing shaft 130S and is coaxial with the pivot X1. As shown in FIG. 8, one end 139 </ b> A of the torsion coil spring 139 is hooked on the inertia lever 130. The other end 139 </ b> B of the torsion coil spring 139 is hooked on the guide base 93. Thus, the torsion coil spring 139 biases the inertia lever 130 around the pivot X1 in the direction D4. Thus, in the normal state, as shown by the solid line in FIG. 8, the inertia lever 130 is positioned directly below the pivot X1 with the mass body 131 stopped against the inner wall surface of the recess 93 </ b> A, and the restraining portion 132 is restrained by the pole 12. The posture is set to be separated forward from the portion 12M. The position of the inertia lever 130 is the first position of the present invention. That is, the torsion coil spring 139 exerts an urging force so as to hold the inertia lever 130 in the first position.

  In addition, the inertia lever 130 resists the urging force of the torsion coil spring 139 under the specific conditions described below, and the first position shown by a solid line in FIG. 8 around the pivot X1, and the two-dot chain line in FIG. It can be swung to the second position shown.

  Here, the urging force of the torsion coil spring 139 is determined as follows corresponding to the inertial force acting on the inertial lever 130.

  First, as shown in FIG. 1, when the tailgate 2 closes the opening 9A of the vehicle body 9, an impact acting on the tailgate 2 is defined as an impact F11. An impact acting on the tailgate 2 or the vehicle body 9 at the time of a collision with the vehicle or the like is referred to as an impact F12. In this embodiment, the impacts F11 and F12 act in the direction from the rear to the front.

  When the impact F11 acts on the tailgate 2 when the tailgate 2 closes the opening 9A of the vehicle body 9, the first inertial force F1 that is the inertial force acting on the inertial lever 130 is a region on the left side of the graph of FIG. Small enough to show.

  On the other hand, when the impact F12 acts on the tailgate 2 or the vehicle body 9 at the time of a collision with the vehicle or the like, the second inertial force F2 that is an inertial force acting on the inertial lever 130 is an area on the right side of the graph of FIG. As shown, it is significantly greater than the first inertial force F1. Such a difference between the first inertial force F1 and the second inertial force F2 can be clarified by measuring an impact value under various conditions by attaching an acceleration pickup or the like to the vehicle.

  And between the 1st inertial force F1 and the 2nd inertial force F2, as shown in the center area | region of the graph of FIG. 9, the setting value G1 is set suitably. The torsion coil spring 139 has its urging force adjusted in accordance with the magnitude of the mass of the mass body 131 of the inertia lever 130 and the relative positional relationship between the center of gravity of the inertia lever 130 and the pivot X1. The More specifically, parameters such as the wire diameter, spring constant, and compression length of the torsion coil spring 139 are adjusted. By such adjustment, the torsion coil spring 139 holds the inertia lever 130 at the first position below the set value G1 larger than the first inertia force F1, while the second inertia force F2 exceeding the set value G1 is inertial. When acting on the lever 130, the biasing force is set to allow the inertial lever 130 to swing to the second position.

<Effect>
In the door lock device 1 according to the first embodiment, the first inertia force F <b> 1 can act on the inertia lever 130 by the impact F <b> 11 when the tailgate 2 closes the opening 9 </ b> A of the vehicle body 9. In this case, the torsion coil spring 139 as an urging member holds the inertia lever 130 in the first position as shown by a solid line in FIG. 8 below a set value G1 larger than the first inertia force F1. In this case, the restraining portion 132 is spaced forward from the restrained portion 12M of the pole 12. For this reason, at the time of swinging of the pole 12 when the tailgate 2 closes the opening 9A of the vehicle body 9, the restraining portion 132 does not come into contact with the restrained portion 12M and does not interfere with the operation of the pole. As a result, the tailgate 2 can reliably close the opening 9A of the vehicle body 9.

  Further, in the door lock device 1, the second inertia force F <b> 2 exceeding the set value G <b> 1 can act on the inertia lever 130 due to the impact F <b> 12 during a collision with the vehicle. In this case, the torsion coil spring 139 allows the inertia lever 130 to swing to the second position indicated by a two-dot chain line in FIG. For this reason, when the inertia lever 130 swings from the first position to the second position around the pivot X1 by the second inertia force F2, the restraining portion 132 is positioned on the right side with respect to the restrained portion 12M of the pole 12. . For this reason, as shown in FIG. 10, even if the switching lever 110 swings around the swing shaft main body 161 in the direction opposite to the direction D3 and presses the contact portion 12P, the restraint portion 132 remains in the restrained portion 12M. And the pole 12 is restrained. As a result, the stopper surface 12A of the pole 12 and the latch surface 11D of the fork remain in contact with each other, and the fork 11 remains in the latched state. As a result, even if the switching lever 110 is displaced unexpectedly, the tailgate 2 can be prevented from being opened.

  Therefore, the door lock device 1 according to the first embodiment can reliably prevent the tailgate 2 from opening unexpectedly at the time of an impact or the like, and when the tailgate 2 closes the opening 9A of the vehicle body 9, Closure can be performed.

  Further, in the door lock device 1, the inertia lever 130 restrains the pole 12 only at the time of a collision or the like. Therefore, an inertia lever 130 is provided on one of the switching lever 110 and the pole 12, and the inertia lever 130 is in contact with the other of the switching lever 110 and the pole 12 each time the tailgate 2 is opened. The door lock device 1 can improve the durability of the inertia lever 130 and its support portion.

  Moreover, since this door lock device 1 employs a configuration in which the pivot X1 extends in a direction orthogonal to the pole axis X12, the outer shape of the door lock device 1 when viewed from the pole axis X12 direction is The inertia lever 130 is easily laid out so as to be small.

  Furthermore, this door lock device 1 is not provided with the inertia lever 130 in the switching lever 110 having the movable mechanism 150, but is provided with the inertia lever 130 in the housing 90. In other words, a plurality of mechanisms are used as a plurality of members. Dispersed. Therefore, in the case where the switching lever 110 has a movable mechanism 150 for locking or unlocking, a configuration in which the switching lever 110 is further provided with an inertia lever 130, in other words, a configuration in which a plurality of mechanisms are concentrated on a single member. In comparison, the door lock device 1 can achieve a simplified device configuration.

(Example 2)
In the door lock device of the second embodiment, instead of the inertia lever 130 and the torsion coil spring 139 provided on the guide base 93 in the first embodiment, the inertia provided on the base plate 91 as shown in FIGS. A lever 230 and a torsion coil spring 239 are employed. In the door lock device of the second embodiment, the restrained portion 12M of the pole 12 is removed. Other configurations of the second embodiment are the same as those of the first embodiment. For this reason, about the same structure as Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted or simplified.

  In the second embodiment, as shown in FIGS. 11 and 12, a horizontal portion 91 </ b> G is formed in which the rear end edge side of the base plate is bent substantially horizontally in the vicinity of the contact portion 12 </ b> P of the pole 12. A shaft hole 91H is provided through the horizontal portion 91G. An inertia lever swing shaft 230S is fitted into the shaft hole 91H from above. As shown in FIG. 14, on the right side of the shaft hole 91H in the horizontal portion 91G, there is formed a stopper portion 91S in which the inner side of the substantially “U” shaped slit is bent upward.

  As shown in FIGS. 11 and 12, the inertia lever swing shaft 230S has a pivot X2 extending in a direction (namely, the vertical direction) perpendicular to the direction (namely, the front-rear direction) that advances and retreats to the opening 9A of the vehicle body 9. Yes. The pivot axis X2 extends substantially parallel to the pole axis X12. Here, “substantially parallel” includes a case where the direction in which the striker 99 advances / retreats (that is, the front-rear direction) and the direction in which the striker 99 advances / retreats with respect to the entrance / exit 98 have a certain degree of deviation. Yes.

  The inertia lever 230 is positioned on the upper side with respect to the horizontal portion 91G, and is supported by the inertia lever swing shaft 230S so as to be swingable around the pivot axis X2.

  The inertia lever 230 is made of, for example, a zinc alloy die-cast, and has a mass body 231 extending in a block shape from the pivot X2 to the left, and extends from the pivot X2 to the right and then forwards. And a restraining portion 232 protruding like a key.

  The torsion coil spring 239 is mounted on the inertia lever swing shaft 230S and is coaxial with the pivot X2. As shown in FIG. 14, one end 239 </ b> A of the torsion coil spring 239 is hooked on the inertia lever 230. The other end 239 </ b> B of the torsion coil spring 239 is hooked on the base plate 91. Thereby, the torsion coil spring 239 urges the inertia lever 230 around the pivot X2 in the direction D5. Thus, in the normal state, the inertia lever 230 has the mass body 231 located on the left side of the pivot X2 and the restraining portion 232 abutting against the stopper portion 91S as shown by the solid line in FIG. The posture is to be separated backward with respect to the portion 12P. The position of the inertia lever 230 is the first position of the present invention. That is, the torsion coil spring 239 exerts an urging force so as to hold the inertia lever 230 in the first position.

  In addition, the inertia lever 230 resists the urging force of the torsion coil spring 239 under the specific conditions described below, while the first position shown by a solid line in FIG. 14 around the pivot X2 and the two-dot chain line in FIG. It can be swung to the second position shown.

  Here, the urging force of the torsion coil spring 239 is determined corresponding to the inertial force acting on the inertial lever 230 in the same manner as in the first embodiment.

  That is, as shown in FIG. 9, the set value G1 is set appropriately as in the case of the first embodiment. The torsion coil spring 239 has its urging force adjusted in accordance with the mass of the mass 231 of the inertia lever 230 and the relative position relationship between the center of gravity of the inertia lever 230 and the pivot X2. The By such adjustment, the torsion coil spring 239 holds the inertia lever 230 at the first position below the set value G1 larger than the first inertia force F1, while the second inertia force F2 exceeding the set value G1 is inertial. When acting on the lever 230, the biasing force is set so as to allow the inertial lever 230 to swing to the second position.

  In the door lock device of the second embodiment, the first inertial force F1 can act on the inertial lever 230 by the impact F11 when the tailgate 2 closes the opening 9A of the vehicle body 9. In this case, the torsion coil spring 239 as the urging member holds the inertia lever 230 in the first position as shown by a solid line in FIG. 14 below the set value G1 larger than the first inertia force F1. In this case, the restraining portion 232 is separated rearward from the contact portion 12P of the pole 12. For this reason, when the pole 12 swings when the tailgate 2 closes the opening 9A of the vehicle body 9, the restraining portion 232 does not come into contact with the contact portion 12P and does not interfere with the operation of the pole. As a result, the tailgate 2 can reliably close the opening 9A of the vehicle body 9.

  Further, in this door lock device, the second inertia force F2 exceeding the set value G1 can act on the inertia lever 230 due to the impact F12 at the time of a collision with the vehicle or the like. In this case, the torsion coil spring 239 allows the inertia lever 230 to swing to the second position indicated by a two-dot chain line in FIG. Therefore, when the inertia lever 230 swings from the first position to the second position around the pivot X2 by the second inertia force F2, the restraining portion 232 is positioned on the right side with respect to the contact portion 12P of the pole 12. . For this reason, as shown in FIG. 16, even if the switching lever 110 swings around the swing shaft main body 161 in the direction opposite to the D3 direction and presses the contact portion 12P, the restraining portion 232 does not stop the contact portion 12P. And the pole 12 is restrained. As a result, the stopper surface 12A of the pole 12 and the latch surface 11D of the fork remain in contact with each other, and the fork 11 remains in the latched state. As a result, even if the switching lever 110 is displaced unexpectedly, the tailgate 2 can be prevented from being opened.

  Therefore, the locking device according to the second embodiment can achieve the same effects as the locking device 1 according to the first embodiment.

  Further, since this locking device employs a configuration in which the pivot axis X2 extends in a direction substantially parallel to the pole axis X12, the pole 12 and the inertia lever 130 in the direction of the pole axis X12 as in the first embodiment. The inertia lever 230 can be easily laid out so that the thickness of the door lock device 1 in the direction of the pole axis X12 is smaller than the case where the doors are aligned.

Example 3
In the door lock device of the third embodiment, the switching mechanism 100, the locking / unlocking lever 180, the electric actuator 190, and the rod 7 in the first embodiment are removed, and instead, a simple cable is used as shown in FIGS. 307 is adopted. Accordingly, in the door lock device of the third embodiment, the shapes of the base plate 91, the back plate 92, and the pole 12 in the first embodiment are changed. Other configurations of the third embodiment are the same as those of the first embodiment. For this reason, about the same structure as Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted or simplified.

  In Example 1, as shown in FIG. 3 and the like, the base plate 91 has an upward bent portion formed on the rear edge side. However, in Example 3, as shown in FIGS. The base plate 91 has a rear end edge 91J formed by removing the bent portion. The base plate 91 is formed with a cable holding portion 91K that protrudes rearward from the right end side of the rear end edge 91J. The cable holding portion 91K is provided with a notch 91L that is recessed downward.

In Example 1, as shown in FIG. 3 or the like, the back plate 92, had a standing wall portion 92C, in Embodiment 3, as shown in FIGS. 17 to 19, the back plate 92, The standing wall portion 92C is removed.

  Further, in the first embodiment, as shown in FIG. 3 and the like, the contact portion 12P is formed on the pole 12, but in the third embodiment, as shown in FIGS. 12Q is formed. The connecting portion 12Q protrudes away from the pole swinging shaft 12S. The connecting portion 12Q is located behind the restrained portion 12M and the rear end edge 91J.

The cable 307 is a steel cable inserted in the guide tube 307K so as to be reciprocally movable. Although illustration is omitted, one end of the cable 307 is connected to the door handle 8 shown in FIG. As shown in FIGS. 18 and 19, the other end 307 </ b> B of the cable 307 is connected to the connecting portion 12 </ b> Q of the pole 12. As shown in FIG. 18, the other end of the guide tube 307K is fitted in the cutout portion 91 L of the cable holding portion 91K. The cable 307 is an example of the “switching unit” of the present invention, and is also an example of the “connecting member” of the present invention.

  When the door handle 8 is operated by the occupant, the cable 307 also moves in the guide tube 307K as the door handle 8 is displaced. Then, as shown in FIG. 20, the other end 307B of the cable 307 moves to the right so as to approach the cable holding portion 91K, and the displacement is transmitted to the connecting portion 12Q of the pole 12. As a result, the pole 12 swings around the pole axis X12 from the position shown by the solid line in FIG. 20 to the position shown by the two-dot chain line in FIG. 20 while resisting the biasing force of a coil spring (not shown). At this time, since the stopper surface 12A is separated from the latch surface 11D, the pole 12 opens the fork 11. When the door handle 8 is no longer operated and the cable 307 returns to the original state, the pole 12 also returns to the position indicated by the solid line in FIG.

  Further, in this door lock device, the second inertial force F2 exceeding the set value G1 can act on the inertial lever 130 due to the impact F12 at the time of a collision with the vehicle. In this case, as described in the first embodiment, the torsion coil spring 139 allows the inertia lever 130 to swing to the second position indicated by a two-dot chain line in FIG. For this reason, when the inertia lever 130 swings from the first position to the second position around the pivot X1 by the second inertia force F2, as shown in FIG. Located on the right side. For this reason, even if the other end 307B of the cable 307 tries to move to the right side, the restraining portion 132 comes into contact with the restrained portion 12M and restrains the pole 12. As a result, the stopper surface 12A of the pole 12 and the latch surface 11D of the fork remain in contact with each other, and the fork 11 remains in the latched state. As a result, even if the cable 307 is displaced unexpectedly, the tailgate 2 can be prevented from being opened.

  Therefore, the locking device according to the third embodiment can achieve the same operational effects as the locking device 1 according to the first embodiment.

  In the above, the present invention has been described with reference to the first to third embodiments. However, the present invention is not limited to the first to third embodiments, and can be appropriately modified and applied without departing from the spirit of the present invention. Needless to say.

  For example, the inertia lever may be supported by the back plate 92 so as to be swingable.

  Further, the biasing member is not limited to the torsion coil spring, and may be, for example, a tension coil spring, a compression coil spring, or a leaf spring.

  The present invention is applicable to vehicles such as automobiles, buses, and industrial vehicles.

9 ... car body 9A ... opening 2 ... door (tailgate)
99 ... striker 98 ... advance entrance 90 ... housing 11 ... fork X12 ... pole axis 12 ... pole 8 ... door handle 110 ... switching lever 7 ... rod (connecting member)
307 ... Cable (connection member)
DESCRIPTION OF SYMBOLS 1 ... Door lock apparatus for vehicles X1, X2 ... Axis 130, 230 ... Inertial lever 139, 239 ... Energizing member (torsion coil spring)
F1 ... First inertia force F2 ... Second inertia force G1 ... Setting value 91 ... Base plate 92 ... Back plate 93 ... Guide base 150 ... Movable mechanism

Claims (7)

A housing that is provided at a door that opens and closes the opening of the vehicle body and has an entrance through which a striker fixed to the vehicle body enters;
A fork that is swingably provided in the housing and switches to a latched state in which the striker is locked in the entrance, or an unlatched state in which the striker is released in the entrance.
A pole provided in the housing so as to be swingable around a pole axis, and a pole capable of fixing or releasing the swing of the fork;
A vehicle door lock device comprising: switching means for displacing in conjunction with an opening operation of the door handle, acting on the pawl, and switching the fork from the latched state to the unlatched state,
The housing has an inertia lever that is swingable from a first position to a second position about a pivot extending in a direction orthogonal to the direction of advancement / retraction to the opening, and holds the inertia lever at the first position. And an urging member that exerts an urging force is provided,
The biasing member holds the inertial lever in the first position below a set value greater than a first inertial force that can act on the inertial lever due to an impact when the door closes the opening. The biasing force is set to allow the inertial lever to swing to the second position when a second inertial force exceeding a set value acts on the inertial lever;
The inertia lever is configured to avoid contact with the pawl in the first position, and to contact and restrain the pawl in the second position regardless of the displacement of the switching means. A vehicle door lock device.   The vehicle door lock device according to claim 1, wherein the pivot extends in a direction orthogonal to the pole axis.   The vehicle door lock device according to claim 1, wherein the pivot extends in a direction substantially parallel to the pole axis. The housing has the base plate in which the entrance is formed, a back plate facing the base plate, and a guide base assembled between the base plate and the back plate,
The fork and the pole are supported so as to be swingable in a state of being sandwiched between the base plate and the back plate,
4. The vehicle door lock device according to claim 1, wherein the inertia lever and the biasing member are provided on any one of the base plate, the back plate, and the guide base. 5.   5. The switching device according to claim 1, wherein the switching unit includes a switching lever swingably provided on the housing, and a connecting member having one end connected to the door handle and the other end connected to the switching lever. The vehicle door lock device according to claim 1.   The switching lever can be switched to the unlocked position while the latched fork is displaced to a locked position where it cannot act on the pawl by a locking operation that disables the latched fork to the unlatched state. The vehicle door lock device according to claim 5, further comprising a movable mechanism that is displaced to an unlocking position that can act on the pawl by an unlocking operation.   The vehicle door lock device according to any one of claims 1 to 4, wherein the switching means is a connecting member having one end connected to the door handle and the other end connected to the pole.

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