JP5136702B2 - Hood lock structure - Google Patents

Description

  The present invention relates to a hood lock structure provided with an auxiliary latch mechanism.

In a vehicle having a long distance from the hood lock mechanism to the front end of the hood, the operation lever (auxiliary lever) of the safety mechanism (auxiliary latch mechanism) may be set long (see, for example, Patent Document 1). Such an operating lever is set to have a certain degree of rigidity from the viewpoint of operability.
JP 2005-88696 A

  However, if the rigidity of the operating lever is set high, the operating lever is less likely to be deformed when a collision object collides with the closed hood from the front end side. ) Has a room for improvement.

  In consideration of the above fact, the present invention can increase the deformation stroke of the front end portion of the hood when a collision body collides with the hood from the front end side while ensuring the operability of the auxiliary lever. The object is to obtain a hood lock structure that can be used.

  The hood lock structure according to the first aspect of the present invention includes a hood lock mechanism that locks the front end of the hood to the vehicle body side in a closed state of the hood that is attached to the vehicle body so as to be opened and closed, and the hood lock mechanism. An auxiliary latch mechanism provided separately, and the auxiliary latch mechanism is provided with a hook attached to a vehicle body side and a lock state of the hood by the hood lock mechanism provided on the hood side. A hood catch that is engaged with the hook when the hood is displaced in the opening direction in a state where the hood is released, and is coupled to the upper side of the hood catch and provided on the vehicle front side with respect to the hood catch The auxiliary lever, the upper side of the hood catch, and the auxiliary lever can be integrally rotated around the axis in the hood width direction. In addition, when a load greater than a predetermined value to the rear lower side of the vehicle is input to the auxiliary lever with the hood closed, the auxiliary lever is moved to the hood catch by the input of the load. And a connecting structure that allows relative rotational displacement about an axis in the hood width direction.

  According to the hood lock structure according to the first aspect of the present invention, the front end of the hood is locked to the vehicle body side by the hood lock mechanism in the closed state of the hood attached to the vehicle body so as to be openable and closable. The auxiliary latch mechanism provided separately from the hood lock mechanism was provided on the hood side when the hood was displaced in the opening direction with the hood lock state released by the hood lock mechanism released. A hood catch engages with a hook provided on the vehicle body side.

  The upper side of the hood catch and the auxiliary lever provided on the front side of the vehicle with respect to the hood catch are coupled by a coupling structure so as to be integrally rotatable around the hood width axis. Yes. Accordingly, when the auxiliary lever is operated, the hood catch is rotationally displaced around the axis in the hood width direction in response to this operation, and is retracted to a position where it is not locked with the hook. On the other hand, when a load greater than a predetermined value is input to the auxiliary lever to the rear lower side when the hood is closed, the auxiliary lever is moved in the hood width direction relative to the hood catch by the input of the load. Relative rotational displacement about the axis is allowed by the connecting structure. For this reason, even if the rigidity of the auxiliary lever is set high, if the collision object collides with the hood from the front end side, the front end of the hood will change according to the rotational displacement of the auxiliary lever. Deform.

  According to a second aspect of the present invention, in the hood lock structure according to the first aspect, the connection structure is provided on the hood side, the hood side end of the hood catch, and the auxiliary lever A first pin penetrating the hood catch side end in the hood width direction; and a second pin penetrating the hood catch and the auxiliary lever away from the first pin in the hood width direction. In addition, when a load greater than a predetermined value to the rear lower side of the vehicle is input to the auxiliary lever in the closed state of the hood, the first pin and the second pin around the axis of the first pin It is configured to include a structure in which the restriction state of the relative rotational displacement between the hood catch and the auxiliary lever is released.

  According to the hood lock structure according to the second aspect of the present invention, the hood side end portion of the hood catch and the hood catch side end portion of the auxiliary lever are provided by the first pin provided on the hood side. It is penetrated in the hood width direction. The hood catch and the auxiliary lever are penetrated in the hood width direction by the second pin at a position away from the first pin. As a result, the integrated shape of the hood catch and the auxiliary lever can be easily set.

  In addition, when a load greater than a predetermined value on the rear lower side of the vehicle is input to the auxiliary lever when the hood is closed, the hood catch around the axis of either the first pin or the second pin The restriction state of the relative rotational displacement with respect to the auxiliary lever is released. Then, the auxiliary lever is rotationally displaced about one of the first pin and the second pin by the input of the load. For this reason, when a colliding body collides with the hood from the front end side, the auxiliary lever rotates and displaces around the axis of either the first pin or the second pin. The front end is deformed.

  According to a third aspect of the present invention, in the hood lock structure according to the second aspect, the connection structure is formed at an end of the auxiliary lever on the hood catch side and is detached from the first pin. An engaging portion that is engaged with the hood, and an end portion on the hood catch side of the auxiliary lever that is provided on the hood side is opposite to a direction in which the engaging portion is detached from the first pin. The engaging portion is disengaged from the first pin when a load greater than a predetermined value is input to the auxiliary lever in the rear lower side when the hood is closed and the hood is closed. And an urging member in which an urging force is set.

  According to the hood lock structure according to the third aspect of the present invention, the engagement portion formed at the end on the hood catch side of the auxiliary lever is detachably engaged with the first pin. Further, the end portion on the hood catch side of the auxiliary lever is urged in a direction opposite to the direction in which the engagement portion is detached from the first pin by the urging member provided on the hood side. Therefore, at the normal time, the integrated shape of the hood catch and the auxiliary lever is maintained.

  Here, the urging force of the urging member is such that the engagement portion is disengaged from the first pin when a load greater than a predetermined value is input to the auxiliary lever in the rear lower side in the closed state of the hood. Is set. Therefore, in the auxiliary lever, when the load is input, the engaging portion is detached from the first pin and rotationally displaced about the axis of the second pin. For this reason, when a collision body collides with the hood from the front end side, the front end portion of the hood is deformed as the auxiliary lever is rotationally displaced around the axis of the second pin.

  According to a fourth aspect of the present invention, in the hood lock structure according to the second aspect, the connection structure is configured such that an arc-shaped through portion centered on the first pin is formed in the hood catch and the through portion. The second pin penetrates through the inner upper part of the inner surface of the pierced part, and a convex part that supports the second pin is formed on the inner surface of the penetrating part.

  According to the hood lock structure according to the fourth aspect of the present invention, the hood catch is formed with an arc-shaped penetrating portion centered on the first pin, and the second pin penetrates the inner upper portion of the penetrating portion. And the convex part formed in the inner surface of the penetration part is supporting the 2nd pin. For this reason, when a load greater than a predetermined value to the rear lower side of the vehicle is input to the auxiliary lever in the closed state of the hood, the convex portion is deformed by the load from the second pin, so that the second pin At the same time, the auxiliary lever is rotationally displaced about the axis of the first pin. For this reason, when a collision body collides with the hood from the front end side, the front end portion of the hood is deformed as the auxiliary lever is rotationally displaced around the axis of the first pin.

  As described above, according to the hood lock structure according to the first aspect of the present invention, the hood is secured when the collision body collides with the hood from the front end side while ensuring the operability of the auxiliary lever. It has the outstanding effect that the deformation | transformation stroke of a front-end part can be enlarged.

  According to the hood lock structure according to the second aspect of the present invention, an integrated shape of the hood catch and the auxiliary lever can be easily formed, and the hood catch and the auxiliary lever at the time of input of the collision load. It has an excellent effect that the relative rotational displacement can be easily set.

  According to the hood lock structure according to the third aspect of the present invention, when a load greater than a predetermined value on the rear lower side of the vehicle is input to the auxiliary lever while the hood is closed, the auxiliary lever is connected to the hood catch. Since the setting for relative rotational displacement can be made by changing the urging force of the urging member, there is an excellent effect that the setting can be further facilitated.

  According to the hood lock structure according to the fourth aspect of the present invention, it is possible to further increase the deformation stroke of the front end portion of the hood when a collision body collides with the hood from the front end side. Have.

It is a sectional side view showing the food lock structure concerning a 1st embodiment of the present invention. It is a perspective view which shows the auxiliary latch mechanism of FIG. It is a disassembled perspective view of the auxiliary latch mechanism of FIG. FIG. 4 is an enlarged cross-sectional view taken along line 4-4 of FIG. It is a typical sectional side view which shows the state which the auxiliary lever of FIG. 1 displaced at the time of a collision. It is a sectional side view which shows the state at the time of opening the hood of FIG. 1, and shows the state by which the locked state of the hood by the hood lock mechanism was cancelled | released. It is a sectional side view which shows the state at the time of opening the hood | hood of FIG. 1, and shows the state which the auxiliary lever was pulled up and rotated with the hood catch. It is a FS diagram which shows the characteristic at the time of the food lock structure concerning the 1st Embodiment of this invention being applied, and the characteristic of contrast structure. It is a sectional side view which shows the auxiliary latch mechanism of the hood lock structure which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the auxiliary latch mechanism of FIG. It is a disassembled perspective view of the auxiliary latch mechanism of FIG. It is an expanded sectional view along the 11-11 line of FIG. It is a typical sectional side view which shows the state which the auxiliary lever of FIG. 8 displaced at the time of a collision.

[First Embodiment]
A hood lock structure according to a first embodiment of the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow W indicates the vehicle width direction. In the closed state of the hood, the hood front side is the same direction as the vehicle front side, the hood upper side is the same direction as the vehicle upper side, and the hood width direction is the same direction as the vehicle width direction.

  FIG. 1 shows a hood lock structure 20 according to the first embodiment in a side sectional view. As shown in FIG. 1, an automobile (vehicle) 10 is provided with a hood 14 (engine hood) that covers the engine room 12 of the vehicle body front portion 10 </ b> A so as to be opened and closed. A hinge (not shown) is disposed at the rear end portion of the hood 14 in the vehicle front-rear direction, so that the hood 14 can be rotated around the axis of the hinge in the vehicle width direction, that is, with respect to the vehicle body. It is attached so that it can be opened and closed. A radiator grill 16 is disposed below the front end of the hood 14.

  The outer plate of the hood 14 is constituted by a hood outer panel 14A. The hood outer panel 14 </ b> A extends substantially along the vehicle front-rear direction when the hood 14 is closed. A hood inner panel 14B is disposed below the hood outer panel 14A. The hood inner panel 14 </ b> B constitutes an inner plate of the hood 14. The hood outer panel 14A and the hood inner panel 14B are both formed by press-molding a metal plate (for example, a steel plate, an aluminum alloy plate, etc.). Further, the outer peripheral edge portion (including the front end edge portion 14A1) of the hood outer panel 14A and the outer peripheral edge portion (including the front end edge portion 14B1) of the hood inner panel 14B are joined by an adhesive and a hemming process.

  Between the hood outer panel 14A and the hood inner panel 14B, a dent reinforcement 14C is disposed on the hood outer panel 14A side. The dentin reinforcement 14C is made of a metal plate and is a reinforcing member for suppressing deformation of the hood outer panel 14A when the hood 14 is closed. A strike reinforcement 14D is arranged between the hood outer panel 14A and the hood inner panel 14B on the hood lower side of the dent reinforcement 14C. The strike reinforcement 14D is a metal-made reinforcing member having a bent plate shape for ensuring the rigidity of the front end portion of the hood 14 on the hood inner panel 14B side (around the striker 26 described later).

  A hood lock mechanism 22 is disposed corresponding to the central portion in the hood width direction on the front end side of the hood 14 when in the closed position. The hood lock structure 20 according to this embodiment is applied to a vehicle having a long distance from the hood lock mechanism 22 to the front end edge of the hood 14. The hood lock mechanism 22 is an element that can be grasped as a radiator support upper 28 (a “body skeleton member” in a broad sense) in which the front end of the hood 14 is a part of the vehicle body when the hood 14 is closed (the state shown in FIG. 1). It is a mechanism that locks to the side.

  The hood lock mechanism 22 includes a lock mechanism portion 24 disposed on the rear surface side of the radiator support upper 28 in the engine room 12 and a striker 26 (“hood lock” disposed on the hood 14 side (the hood inner panel 14B side). It is also called a striker.) The lock mechanism 24 includes a base 24A that is fixed to the radiator support upper 28, and a latch 24B that is attached to the base 24A so as to be rotatable about an axis in the vehicle longitudinal direction. Further, the striker 26 is configured such that the latch 24B is locked at the closed position of the hood 14, and the hood 14 in the closed position is held by the latch 24B being locked.

  On the other hand, the radiator support upper 28 to which the base 24A of the lock mechanism 24 is attached constitutes an upper portion of a radiator support (not shown) formed in a substantially rectangular frame shape when the vehicle is viewed from the front (not shown). The radiator support upper 28 is arranged at the upper part on the front end side in the engine room 12 so as to extend along the vehicle width direction.

  An auxiliary latch mechanism 30 separate from the hood lock mechanism 22 is provided on the vehicle front side of the hood lock mechanism 22. The auxiliary latch mechanism 30 includes a hook 32 disposed on the radiator support upper 28 side. The hook 32 is a bent plate-like member bent substantially at a right angle, and an attachment piece 32A is attached to the front side of the radiator support upper 28 by a fastener (for example, a bolt and a nut). In the hook 32, a hook body 32B bent from one end of the attachment piece 32A is formed in a substantially inverted J shape in a side view of the vehicle.

  On the other hand, the bracket 40 for attaching the hood catch 50 and the auxiliary lever 60 is arranged on the hood 14 side. As shown in FIGS. 2 and 3, the bracket 40 has a pair of side plate portions 42, 43 that face each other and the rear end portions of the pair of side plate portions 42, 43 are connected to each other by a back plate portion 44. Attachment pieces 46 and 47 are formed so as to extend away from each other. Fastening holes 46A and 47A are formed through the attachment pieces 46 and 47 of the bracket 40 so as to pass through fasteners (for example, bolts). The attachment pieces 46 and 47 are fasteners (for example, bolts and nuts). Is attached to the hood inner panel 14B (see FIG. 1).

  Further, as shown in FIG. 3, first pin insertion holes 42 </ b> A and 43 </ b> A are formed through the pair of side plate portions 42 and 43 of the bracket 40 for penetrating the first pin 34. Further, a bent piece 48 is formed from the front end of one side plate portion 43 in the bracket 40 to be bent at a substantially right angle to the front end side of the other side plate portion 42. A stopper body 36 having a substantially rectangular box shape is attached to the bent piece 48, and the bent piece 48 and the stopper main body 36 constitute a stopper portion 37.

  An upper end portion of the hood catch 50 is disposed between the pair of side plate portions 42 and 43 of the bracket 40. The food catch 50 includes a pair of side plate portions 52 and 54 opposed to each other at an upper portion thereof, and includes a catch main body 56 that is connected to the rear end lower portions of the pair of side plate portions 52 and 54 and extends downward. ing. First pin insertion holes 52 </ b> A and 54 </ b> A are formed through the upper portions of the side plate portions 52 and 54 of the hood catch 50 for penetrating the first pin 34. Cylindrical bushes 38A and 38B are inserted into the first pin insertion holes 52A and 54A. The first pin 34 can pass through the bushes 38A and 38B. That is, the hood catch 50 is attached to the bracket 40 via the first pin 34, and is supported by the bracket 40 in a state in which it can be rotationally displaced about the axis of the first pin 34.

  In one side plate portion 54 of the hood catch 50, a substantially rectangular hole portion 54B is formed through the lower side of the pin insertion hole 54A. A stopper portion 37 is accommodated in the hole portion 54B, and the stopper portion 37 comes into contact with one side of the inner surface portion of the hole portion 54B (see FIG. 2). The one side plate portion 52 in the hood catch 50 is formed with a second pin insertion hole 52 </ b> B penetrating the second pin 66 below the first pin insertion hole 52 </ b> A.

  Moreover, the catch main body 56 in the hood catch 50 is formed in a vertically long substantially rectangular plate shape. Narrow bent portions 55 bent at substantially right angles to the same side as the side plate portions 52 and 54 from the lower side of the side plate portions 52 and 54 and the lower end portion of the catch body 56 at both side end portions of the catch body 56. Is formed. The catch body 56 is formed with a longitudinally long rectangular hole 56 </ b> A extending therethrough along the longitudinal direction thereof. FIG. 6A shows the auxiliary latch mechanism 30 and its peripheral portion in a state where the hood 14 is unlocked by the hood lock mechanism 22 (see FIG. 1). The hood catch 50 is configured such that the lower end of the catch body 56 is engaged with the hook 32 when the hood 14 is further displaced in the opening direction (arrow A direction) from the state shown in FIG. 6A. Further, as shown in FIG. 6B, the hood catch 50 is retracted so as not to be engaged with the hook 32 by being rotationally displaced forward and upward (in the direction of arrow B) around the axis of the first pin 34 in the hood width direction. It can be retracted to the position.

  As shown in FIG. 1, an auxiliary lever 60 is coupled to the upper side of the hood catch 50. The auxiliary lever 60 is provided on the vehicle front side with respect to the hood catch 50 when the hood 14 is closed. As shown in FIG. 2 and FIG. 3, the auxiliary lever 60 includes a lever base portion 62 that is formed in a plate shape with the vehicle width direction as the plate thickness direction, and is integrated with the hood catch 50. A lever body 64 extending from the lever base 62 to the side opposite to the bracket 40 is provided. In addition, an operation portion 64 </ b> A whose upper end portion is bent at a substantially right angle is formed at the distal end portion of the lever main body portion 64. As shown in these drawings, the auxiliary lever 60 has a certain length in the longitudinal direction of the lever and has a rigidity that does not bend during operation from the viewpoint of operability.

  As shown in FIG. 3, a concave engaging portion 62 </ b> A is formed on the lever base 62 (end on the hood catch 50 side) of the auxiliary lever 60. The engaging portion 62A is formed so as to open toward the rear lower side of the vehicle when the hood is closed, and is releasably engaged (hooked) with the first pin 34 (see FIG. 2). The first pin 34 includes first pin insertion holes 42A and 43A of the side plate portions 42 and 43 in the bracket 40, and first pin insertion holes 52A of the side plate portions 52 and 54 (end portions on the hood 14 side) of the hood catch 50, 54A and the engaging portion 62A of the lever base 62 (end on the hood catch 50 side) of the auxiliary lever 60 are penetrated in the hood width direction. As shown in FIG. 4, which is an enlarged cross-sectional view taken along line 4-4 of FIG. 1, the first pin 34 includes a head portion 34A on one axial end side (left side of FIG. 4) of the shaft portion 34B. At the same time, the shaft end on the other axial end side (right side in FIG. 4) of the shaft portion 34B is crushed (crimped) to form a retaining portion 34C. Thereby, the first pin 34 is attached to the hood 14 side via the bracket 40.

  As shown in FIG. 3, a second pin insertion hole that is used for penetrating the second pin 66 is provided at a portion of the lever base 62 of the auxiliary lever 60 that faces the second pin insertion hole 52 </ b> B of the hood catch 50. 62B is formed through. The second pin 66 is separated from the first pin 34, the second pin insertion hole 52B of the one side plate portion 52 in the hood catch 50, the second pin insertion hole 62B of the lever base 62 in the auxiliary lever 60, Is penetrated in the hood width direction. As shown in FIG. 4, the second pin 66 is a caulking pin and includes a head portion 66A on one axial end side (right side in FIG. 4) of the shaft portion 66B and the other axial end side of the shaft portion 66B. The shaft end (left side in FIG. 4) is crushed (crimped) to form a retaining portion 66C.

  As shown in FIG. 3, one end portion 68A of a torsion spring 68 as a biasing member is locked between the engaging portion 62A and the second pin insertion hole 62B in the lever base portion 62 of the auxiliary lever 60. A small hole 62C for this purpose is formed. As shown in FIG. 2, the coil portion 68B of the torsion spring 68 is wound around the axis of the first pin 34, and the first pin 34 is used as the rotation axis. The other end 68 </ b> C of the torsion spring 68 is locked to the stopper main body 36 attached to the bent piece 48 of the bracket 40. That is, the torsion spring 68 is supported on the hood 14 (see FIG. 1) side via the bracket 40. The torsion spring 68 provided on the hood 14 side shown in FIG. 1 is configured so that the lever base 62 (the end on the hood catch 50 side) of the auxiliary lever 60 is disengaged from the first pin 34 of the engaging portion 62A. It is biased in a direction opposite to (substantially the front upper side of the vehicle) (substantially pressed to the lower rear side of the vehicle).

  Accordingly, the upper side of the hood catch 50 and the auxiliary lever 60 are coupled so as to be integrally rotatable around the first pin 34 in the hood width direction. In the present embodiment, the bracket 40, the first pin 34, the second pin 66, and the first pin insertion holes 52A, 54A, the second pin insertion holes 52B, and the hole portions 54B in the hood catch 50 shown in FIG. The upper side of the hood catch 50 includes the engaging portion 62A, the second pin insertion hole 62B and the small hole 62C forming portion of the auxiliary lever 60, the bushes 38A and 38B, the torsion spring 68, and the stopper portion 37. And the auxiliary lever 60 are connected to each other.

  The connecting structure 70 restricts the relative rotational displacement between the hood catch 50 and the auxiliary lever 60 around the axis of the first pin 34, and the hood catch 50 and the auxiliary lever around the axis of the second pin 66. By regulating the relative rotational displacement with respect to 60, the hood catch 50 and the auxiliary lever 60 are integrated, and the relative angular displacement of the hood catch 50 and the auxiliary lever 60 about the axis in the hood width direction is regulated. It has a structure.

  The urging force of the torsion spring 68 in the coupling structure 70 is applied to the engaging portion 62A when a load of a predetermined value or more on the lower rear side of the vehicle is input to the auxiliary lever 60 in the closed state of the hood 14 shown in FIG. Is set so as to be detached from the first pin 34. Thus, when a load greater than a predetermined value is input to the auxiliary lever 60 with the hood 14 closed, the hood catch 50 and the auxiliary lever around the axis of the second pin 66 are input. The restriction state of relative rotational displacement with respect to 60 is released.

  In other words, the connecting structure 70 allows the auxiliary lever 60 to receive the hood catch when the load is inputted to the auxiliary lever 60 in the closed state of the hood 14 in the lower rear side of the vehicle. With respect to 50, relative rotation displacement around the axis of the second pin 66 in the hood width direction is allowed.

(Action / Effect)
Next, the operation and effect of the above embodiment will be described.

  As shown in FIG. 1, in the closed state of the hood 14, the front end portion of the hood 14 is locked to the radiator support upper 28 side by the hood lock mechanism 22. On the other hand, when the hood 14 is further displaced in the opening direction (arrow A direction) from the state shown in FIG. 6A, that is, the state where the hood 14 is locked by the hood lock mechanism 22 (see FIG. 1). The hood catch 50 provided on the hood 14 side engages with the hook 32 provided on the radiator support upper 28 side (not shown). In order to displace the hood catch 50 to a retracted position not locked with the hook 32, the auxiliary lever 60 is operated (details will be described later).

  Here, the holding of the integrated shape of the hood catch 50 and the auxiliary lever 60 shown in FIG. 1 and the regulation of the relative displacement of the hood catch 50 with respect to the hood 14 will be described.

  In the connection structure 70 that connects the hood catch 50 and the auxiliary lever 60, the end of the hood catch 50 on the hood 14 side and the end of the auxiliary lever 60 on the hood catch 50 side are the hood 14 side. It penetrates in the hood width direction by the first pin 34 attached to the. Further, the hood catch 50 and the auxiliary lever 60 are penetrated in the hood width direction by the second pin 66 at a position away from the first pin 34. By these, the integrated shape of the food catch 50 and the auxiliary lever 60 is easily set.

  Further, as shown in FIG. 2, the end of the auxiliary lever 60 on the side of the hood catch 50 is engaged with the concave engaging portion 62 </ b> A so as to be detachable from the first pin 34, and the hood 14. (See FIG. 1) By a torsion spring 68 that takes a reaction force toward the side, the engaging portion 62A is urged in a direction opposite to the direction in which the engaging portion 62A is detached from the first pin 34 (that is, the direction in which the engaging portion 62A is not detached from the first pin 34). Has been. Therefore, the integrated shape of the hood catch 50 and the auxiliary lever 60 is maintained during normal times (when no collision load is applied).

  On the other hand, during normal operation, as shown in FIG. 1, the engaging portion 62A is engaged with the first pin 34 and the first pin 34 is attached to the hood 14 via the bracket 40. The luxury lever 60 cannot rotate in the clockwise direction of FIG. 1 around the axis of the second pin 66 beyond the engaging position of the engaging portion 62A and the first pin 34. As a result, the urging force of the torsion spring 68 acts to rotate the auxiliary lever 60 counterclockwise in FIG. 1 (pressing in the direction of arrow C) with the first pin 34 as the center. Here, since the auxiliary lever 60 is integrated with the hood catch 50 as described above, the hood catch 50 also tries to turn counterclockwise in FIG. 1 together with the auxiliary lever 60 (in the direction of arrow C). Pressed). On the other hand, since the stopper portion 37 provided on the bracket 40 on the hood 14 (see FIG. 1) hits the hole 54B of the hood catch 50 shown in FIG. Displacement is regulated.

  Accordingly, the catch body 56 whose relative displacement is restricted with respect to the hood 14 shown in FIG. 6A is a case where the hood 14 is displaced in the opening direction (arrow A direction) with the hood 14 unlocked. As described above, it is engaged with the hook 32 (not shown). Therefore, it is possible to prevent the hood 14 from inadvertently moving in the opening direction (arrow A direction).

  On the other hand, as shown in FIG. 6B, the auxiliary latch mechanism 30 rotates and displaces the hood catch 50 around the axis of the first pin 34 toward the front upper side (in the direction of arrow B). It is possible to retreat to a retreat position where the hook 32 is not locked.

  Further, as described above, the upper side of the hood catch 50 and the auxiliary lever 60 are coupled by the coupling structure 70 so as to be integrally rotatable around the axis of the first pin 34. Accordingly, when the hood catch 50 is retracted to the retracted position, if the operation portion 64A of the auxiliary lever 60 is operated to be lifted, the hood catch 50 is rotated around the axis of the first pin 34 accordingly. To the front upper side (in the direction of arrow B).

  More specifically, when the operation part 64A of the auxiliary lever 60 is operated so as to be lifted, the auxiliary lever 60 first tries to move around the second pin 66, but the engagement of the proximal end is difficult. As a result, the joint portion 62A is engaged with the first pin 34, and as a result, it is rotationally displaced about the first pin 34 (in the direction of arrow B). When the hood catch 50 is pulled up integrally with the auxiliary lever 60 in response to this, the hood catch 50 is retracted to a retracted position where it is not locked with the hook 32. If the hood 14 is lifted in the opening direction (arrow A direction) in this state, the hood 14 is opened.

  Next, the operation when the collision body 100 collides with the hood 14 from the front end side will be described with reference to FIGS. In addition, the collision body 100 in the figure is a thigh impactor that simulates a pedestrian's thigh, and an arrow f in the figure indicates the impactor striking direction (the collision direction of the collision object). In addition, a two-dot chain line in the hood 14 and the auxiliary lever 60 in FIG. 5 indicates a position before the collision.

  In the present embodiment, the urging force of the torsion spring 68 in the connection structure 70 shown in FIG. 1 is when a load of a predetermined value or more on the rear lower side of the vehicle is input to the auxiliary lever 60 when the hood 14 is closed. Further, as shown in FIG. 5, the engaging portion 62 </ b> A is set so as to be detached from the first pin 34. In other words, when the hood 14 is closed, the collision body 100 collides and the hood 14 is deformed, and a load greater than a predetermined value to the rear lower side of the vehicle is input to the auxiliary lever 60 via the hood inner panel 14B. In this case, the restriction state of the relative rotational displacement between the hood catch 50 and the auxiliary lever 60 around the axis of the second pin 66 is released.

  When the engaging portion 62 </ b> A is disengaged from the first pin 34 by the input of the load, the auxiliary lever 60 is rotationally displaced about the axis of the second pin 66 (in the direction of the arrow C) and the auxiliary lever 60 is moved. The operation unit 64A side is pushed down. For this reason, even if the rigidity of the auxiliary lever 60 is set high, when the collision body 100 collides with the hood 14 from the front end side, the auxiliary lever 60 is rotated around the axis of the second pin 66. Is rotated and the front end of the hood 14 is deformed accordingly. Therefore, the load acting on the collision body 100 is suppressed by the extent that the auxiliary lever 60 is not stretched, and the deformation stroke S (also referred to as “shock absorbing stroke”) of the front end of the hood 14 is the auxiliary lever 60. Is increased by the stroke S1 corresponding to the rotational displacement.

  FIG. 7 is a graph showing the relationship between the load (F) and the stroke (S) when the collision object collides with the hood. A solid line in FIG. 7 shows characteristics when a structure similar to the hood lock structure 20 according to the present embodiment is adopted, and a two-dot chain line in FIG. 7 is formed by a hood catch and an auxiliary lever as one part. The characteristic of the contrast structure in which the auxiliary latch mechanism is arranged at the same position as in the present embodiment is shown.

  As shown in FIG. 7, when a structure similar to the hood lock structure 20 according to the present embodiment is employed (see the solid line), the deformed hood is auxiliary compared to the contrast structure (see the two-dot chain line). It can be seen that the load after hitting the lever is suppressed and the stroke is increased, and the energy of the collision object is ideally absorbed.

  As described above, according to the hood lock structure 20 according to the present embodiment, the collision body 100 is located from the front end side of the hood 14 while ensuring the operability of the auxiliary lever 60 shown in FIG. When the collision occurs, the deformation stroke of the front end portion of the hood 14 can be increased.

  In the present embodiment, the auxiliary lever 60 is rotated relative to the hood catch 50 when a load greater than or equal to a predetermined value is input to the auxiliary lever 60 while the hood 14 is closed. Since the setting (tuning) for displacing is possible by changing the urging force of the torsion spring 68, the setting (load management) can be facilitated, and the backlash of the connecting portion and the generation of abnormal noise associated therewith are also possible. Can be suppressed.

[Second Embodiment]
Next, a hood lock structure according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 8 shows a side sectional view of the auxiliary latch mechanism 82 of the hood lock structure 80 according to the second embodiment of the present invention. In addition, although illustration is abbreviate | omitted, the auxiliary latch mechanism 82 is provided in the vehicle front side of the hood lock mechanism 22 similarly to 1st Embodiment. 9 is a perspective view of the auxiliary latch mechanism 82 of FIG. 8, and FIG. 10 is an exploded perspective view of the auxiliary latch mechanism 82 of FIG. FIG. 11 is an enlarged cross-sectional view taken along line 11-11 in FIG. 8, and FIG. 12 is a schematic side cross-sectional view showing the displacement state of the auxiliary lever 90 in FIG. Is shown.

  As shown in these drawings, the hood lock structure 80 according to the present embodiment includes a connection structure 94 instead of the connection structure 70 (see FIG. 3 and the like), and thus the hood lock structure according to the first embodiment. Different from structure 20 (see FIG. 1). Other configurations are substantially the same as those of the first embodiment. Therefore, components that are substantially the same as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 8 to 10, the side plate portion 52 of the hood catch 84 is formed with a long hole portion 86 </ b> A as a penetrating portion instead of the second pin insertion hole 52 </ b> B (see FIG. 3, etc.). . The long hole portion 86A is formed in an arc shape with the first pin 34 as the center, and the second pin 66 passes through the upper part inside the long hole portion 86A. On the inner surface of the long hole portion 86 </ b> A, a pair of convex portions 88 that protrude in a protruding shape inside the hole and support the second pin 66 are formed. The distance between the pair of convex portions 88 is set to be shorter than the outer diameter of the second pin 66. Thereby, the 2nd pin 66 is hold | maintained inside the upper end part of 86 A of long hole parts. In the elongated hole portion 86A, the hole width at the portion below the convex portion 88 (the side where the second pin 66 is not disposed) is above the convex portion 88 (the side where the second pin 66 is disposed). It is set to be slightly wider than the hole width in this part. As shown in FIGS. 10 and 11, a small hole 86B for locking one end 68A of the torsion spring 68 between the first pin insertion hole 52A and the long hole 86A in the side plate portion 52. Is formed. The food catch 84 has substantially the same configuration as the food catch 50 (see FIG. 3 and the like) in the first embodiment except for the above points.

  As shown in FIG. 10, the lever base portion 62 of the auxiliary lever 90 is disposed on the side plate portion 42 side (left side in the drawing) of the bracket 40 with respect to the side plate portion 52 of the hood catch 84. Instead of the joint portion 62A (see FIG. 3 etc.), a first pin insertion hole 92A is formed to penetrate the first pin 34. A cylindrical bush 38A is inserted into the first pin insertion hole 92A. Further, the first pin 34 can pass through the bush 38A. The auxiliary lever 90 has substantially the same configuration as the auxiliary lever 60 (see FIG. 3 and the like) in the first embodiment except for the above points.

  Thus, the upper side of the hood catch 84 and the auxiliary lever 90 are connected so as to be integrally rotatable around the first pin 34 in the hood width direction. In the present embodiment, the bracket 40, the first pin 34, the second pin 66, the first pin insertion holes 52A, 54A, the long hole portion 86A, the small hole 86B, and the hole portion 54B in the hood catch 84 are formed. The upper portion of the hood catch 84 and the auxiliary lever 90 include the respective formation portions of the first pin insertion hole 92A and the second pin insertion hole 62B in the ant lever 90, the bushes 38A and 38B, the torsion spring 68, and the stopper portion 37. Is formed.

  The connection structure 94 restricts the relative rotational displacement between the hood catch 84 and the auxiliary lever 90 around the axis of the first pin 34, and the hood catch 84 and the auxiliary lever around the axis of the second pin 66. By regulating the relative rotational displacement with respect to 90, the hood catch 84 and the auxiliary lever 90 are integrated, and the relative angular displacement of the hood catch 84 and the auxiliary lever 90 about the axis in the hood width direction is regulated. It has a structure.

  Further, when a load of a predetermined value or more to the rear lower side of the vehicle is input to the auxiliary lever 90 with the hood 14 shown in FIG. 8 closed, the convex portion 88 of the long hole portion 86A is the second pin. By being crushed (deformed) by receiving a load from 66, the restriction state of the relative rotational displacement between the hood catch 84 and the auxiliary lever 90 around the axis of the first pin 34 is released as shown in FIG. It has become a structure. In addition, the dashed-two dotted line in the hood 14 and the auxiliary lever 90 of FIG. 12 has shown the position before a collision.

  In other words, the connecting structure 94 allows the auxiliary lever 90 to move the hood catch by the input of the load when a load of a predetermined value or more to the rear lower side of the vehicle is input to the auxiliary lever 90 with the hood 14 closed. 84 is allowed to relatively rotate around the axis of the first pin 34 in the hood width direction.

(Action / Effect)
According to the hood lock structure according to the present embodiment, when the hood 14 is closed and when the hood 14 is opened, the same operations and effects as in the first embodiment are obtained. Further, when a colliding body collides with the hood 14 from the front end side, a load in the push-down direction acts on the auxiliary lever 90 via the hood 14. Then, as shown in FIG. 12, the protrusion 88 (see FIG. 8) of the elongated hole portion 86A receives a load from the second pin 66 and is crushed, whereby the rigidity of the auxiliary lever 90 is set high. In addition, the auxiliary lever 90 is rotationally displaced about the axis of the first pin 34 (in the direction of arrow D), and the operation portion 64A side of the auxiliary lever 90 is pushed down. The front end of the hood 14 is deformed in accordance with the rotational displacement of the auxiliary lever 90. Therefore, the load acting on the collision body is suppressed by the extent that the auxiliary lever 90 is not stretched, and the deformation stroke S of the front end portion of the hood 14 is increased by the stroke S2 corresponding to the rotational displacement of the auxiliary lever 90. Become.

  For this reason, even with the configuration of the present embodiment, the deformation stroke S of the front end portion of the hood 14 is reduced when a collision object collides with the hood 14 from the front end side while ensuring the operability of the auxiliary lever 90. Can be bigger. In particular, in this embodiment, the auxiliary lever 90 is rotationally displaced about the axis of the first pin 34. Therefore, when a collision body collides with the hood 14 from the front end side, the front end portion of the hood 14 is deformed. The stroke S can be further increased.

[Supplementary explanation of the embodiment]
In the above-described embodiment, the connection structures 70 and 94 are configured to include two pins, the first pin 34 and the second pin 66, but the connection structure is, for example, the hood width direction in the axial direction. The upper side of the hood catch and the auxiliary lever are integrated around the axis in the hood width direction by a single pin that is rotatably supported by the bracket on the hood side and press-fitted into the auxiliary lever and hood catch. When a load exceeding the predetermined value is input to the auxiliary lever in the rear lower side of the vehicle when the hood is closed, the auxiliary lever is input by the input of the load. A structure in which the holding force by the press-fitting is set (adjusted) so as to allow relative rotational displacement of the hood catch around the axis of the one pin in the hood width direction Other may be connected structure like.

  The connecting structure includes, for example, a first pin that passes through either the auxiliary lever or the hood catch in the hood width direction and is rotatably supported by the hood side bracket, and the hood width direction as an axial direction. By providing the auxiliary lever and the second pin press-fitted to the hood catch, the upper side of the hood catch and the auxiliary lever can be integrally rotated and displaced about the axis in the hood width direction. When a load exceeding the specified value is input to the auxiliary lever with the hood closed, the auxiliary lever moves in the hood width direction with respect to the hood catch. Such as a structure in which the holding force by the press-fitting is set (adjusted) so as to allow relative rotational displacement about the axis of the second pin It may be another connection structure.

  In addition, an elongated hole portion having an arc shape around the second pin 66 is formed at the end of the auxiliary lever on the hood catch side, instead of the concave engaging portion 62A according to the first embodiment. And the hole width of the elongated hole portion is set to be slightly larger than the outer diameter (diameter) of the first pin, and the portion on the inner surface side of the upper end which is one end side in the longitudinal direction of the elongated hole portion is engaged. The connection structure may be configured by adopting a structure as a part.

  In the second embodiment, the penetrating portion is the long hole portion 86A. The penetrating portion is, for example, an arc-shaped notch portion centered on the first pin (34) (that is, the second notch portion). In the embodiment, the upper end side or the lower end side of the elongated hole portion 86A may be extended to form a penetrating portion having an opening end.

  In addition, the said embodiment and the above-mentioned some modification can be implemented combining suitably.

Claims (4)

A hood lock mechanism for locking the front end of the hood to the vehicle body side in a closed state of the hood attached to the vehicle body so as to be openable and closable;
An auxiliary latch mechanism provided separately from the hood lock mechanism;
The auxiliary latch mechanism has
A hook attached to the vehicle body,
A hood catch that is provided on the hood side and is engaged with the hook when the hood is displaced in the opening direction in a state where the locked state of the hood by the hood lock mechanism is released;
An auxiliary lever coupled to the upper side of the hood catch and provided on the vehicle front side with respect to the hood catch;
The upper side of the hood catch and the auxiliary lever are connected so as to be integrally rotatable around a hood width axis, and the rear side of the auxiliary lever is connected to the auxiliary lever when the hood is closed. A connection structure that allows the auxiliary lever to be relatively rotationally displaced about the axis in the hood width direction with respect to the hood catch when a load of a predetermined value or more is input to the side; ,
A hood lock structure. The connection structure is
A first pin that is provided on the hood side and penetrates the hood side end of the hood catch and the hood catch side end of the auxiliary lever in the hood width direction;
A second pin penetrating the hood catch and the auxiliary lever away from the first pin in the hood width direction;
And when a load greater than or equal to a predetermined value to the rear lower side of the vehicle is input to the auxiliary lever in the closed state of the hood, around the axis of either the first pin or the second pin The hood lock structure of Claim 1 comprised including the structure by which the restriction | limiting state of the relative rotational displacement of the said food catch and said auxiliary lever of this is cancelled | released. The connection structure is
An engaging portion formed at an end of the auxiliary lever on the side of the hood catch and detachably engaged with the first pin;
Provided on the hood side, and urges an end on the hood catch side of the auxiliary lever in a direction opposite to a direction in which the engagement portion is detached from the first pin, and closes the hood. An urging member set with an urging force so that the engagement portion is disengaged from the first pin when a load greater than a predetermined value to the rear lower side of the vehicle is input to the auxiliary lever in a state; ,
The hood lock structure according to claim 2, comprising:   In the connection structure, an arc-shaped through portion centered on the first pin is formed in the hood catch, the second pin passes through an inner upper portion of the through portion, and the inner surface of the through portion is formed on the inner surface of the through portion. The hood lock structure according to claim 2, comprising a structure in which a convex portion for supporting the second pin is formed.

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