JP4973391B2 - Hood lock structure - Google Patents

Description

  The present invention relates to a hood lock portion structure for locking a hood to a vehicle body side.

  In the front part of the vehicle body, in order to reduce the impact load generated on the collision object when the collision object collides near the front end of the hood, for example, the impact load acting on the hood lock device from the lock striker exceeds a predetermined value. In this case, there is a structure in which a part of the lock base attaching part is detached and the lock base is rotated around the one attaching part (for example, see Patent Document 1).

In such a structure, there may be a case where the reaction force becomes low with respect to the input from the hood after a part of the lock base mounting part is detached. In such a case, the energy absorption efficiency is not good. .
JP 2002-19641 A

  In view of the above fact, an object of the present invention is to obtain a hood lock structure that can efficiently absorb energy when a collision object collides with the vicinity of the front end of the hood.

The hood lock portion structure of the present invention described in claim 1 is attached to the hood side and is capable of engaging with a lock means on the vehicle body side, and is attached to the vehicle body side and the lock means is disposed. In the closed state of the hood, a lock base capable of supporting the lock striker and an attachment portion on the vehicle body side of the lock base are provided, and an impact load of a predetermined value or more is input to the lock base from above the hood. Shock absorbing means for absorbing the energy by guiding the lock base to the vehicle lower side while resisting the shock load in the case, the shock absorbing means at both ends of the lock base in the vehicle width direction All of which are arranged with the direction in which the lock base is guided to the vehicle lower side as a longitudinal direction, and the lock base is located on the vehicle lower side. Comprising a mounting base having a through portion for mounting to the direction for guiding the longitudinal direction is formed through the fastening means extending through said through portion for engagement with said vehicle body and said mounting base, a.

  According to the hood lock portion structure of the present invention as set forth in claim 1, the shock absorbing means provided at the mounting portion of the lock base on the vehicle body side receives an impact load of a predetermined value or more from the hood upper side. In this case, the lock base is guided to the lower side of the vehicle while absorbing the impact load, so that the energy is absorbed. The shock absorbing means guides the lock base while resisting the impact load, so that the impact energy is absorbed, and the lock base is guided to the vehicle lower side by the shock absorbing means to ensure the movement stroke of the hood.

Here, the impact absorbing means includes a mounting base that constitutes ends of both sides of the lock base in the vehicle width direction, and a fastening means. The mounting base portion is arranged with the direction in which the lock base is guided to the vehicle lower side as the longitudinal direction, and the through portion is formed with the direction in which the lock base is guided to the vehicle lower side as the longitudinal direction. Then, the mounting base and the vehicle body side are fastened through the through portion . For this reason, when a collision body collides with the vicinity of the front end of the hood and the lock base is guided and moved downward along the direction in which the penetrating part guides, the fastening load in the direction penetrating the penetrating part by the fastening means That is, a substantially constant reaction force is maintained by the axial force of the fastening means.

Hood lock portion structure of the present invention according to claim 2, in the configuration of claim 1 Symbol mounting, the lock striker is provided with a lower shaft portion of the can contact the rod-shaped to said lock base, of the lower shaft portion The axial direction is set substantially perpendicular to the input direction to the hood from the upper front side of the vehicle.

According to the hood lock part structure of the present invention described in claim 2 , the lock striker is configured such that the axial direction of the lower shaft part capable of contacting the lock base is relative to the input direction to the hood from the upper front side of the vehicle. Since it is substantially vertical, when a collision object collides with the vicinity of the front end of the hood, the lock striker efficiently transmits the load acting on the lock striker to the lock base to move the lock base.

According to a third aspect of the present invention, there is provided the hood lock portion structure according to the first or second aspect of the present invention, wherein in the vehicle side view, the surface direction of the mounting surface on the vehicle body side of the lock base is It is characterized by substantially matching with the input direction to the hood from the diagonally upper front side.

According to the hood lock part structure of the present invention described in claim 3 , in the vehicle side view, the surface direction of the mounting surface on the vehicle body side of the lock base substantially coincides with the input direction to the hood from the obliquely upper front side of the vehicle. Therefore, when a collision object collides near the front end of the hood, the load input direction from the lock striker to the lock base and the direction in which the lock base is guided and moved substantially match, and the load from the lock striker to the lock base Move the lock base efficiently.

Hood lock portion structure of the present invention according to claim 4, in the structure according to any one of claims 1 to 3, in the vehicle side view, the input position to the lock base from the lock striker The locking base is set on or near the extension line of the mounting surface on the vehicle body side.

According to the hood lock portion structure of the present invention described in claim 4 , the input position from the lock striker to the lock base is set on or near the extension line of the mounting surface of the lock base on the vehicle body side in a side view of the vehicle. Therefore, when a collision object collides with the vicinity of the front end of the hood, the moment acting on the mounting position between the lock base and the vehicle body accompanying the load input from the lock striker to the lock base is prevented or suppressed. For this reason, the lock base moves stably when guided to the vehicle lower side by the impact absorbing means.

  As described above, according to the hood lock portion structure according to claim 1 of the present invention, an excellent effect that energy can be efficiently absorbed when a collision body collides with the vicinity of the front end portion of the hood. Have

According to the hood lock part structure according to claim 2 , when a collision body collides near the front end of the hood, the load acting on the lock striker is efficiently transmitted to the lock base, so that the reaction force to the collision body is reduced. It has an excellent effect that the lock base can be moved while suppressing an increase.

According to the hood lock part structure according to claim 3 , when a collision body collides near the front end of the hood, the load from the lock striker to the lock base moves the lock base efficiently, It has an excellent effect that the lock base can be moved while suppressing an increase in reaction force.

According to the hood lock part structure of the fourth aspect , there is an excellent effect that the lock base can be stably moved when the collision body collides with the vicinity of the front end of the hood.

[First Embodiment]
The hood lock part structure according to the first embodiment will be described with reference to FIGS. The first embodiment is an embodiment of the present invention. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, and an arrow UP indicates the vehicle upper side.

  As shown in FIG. 1, a hood 14 that covers the engine room 12 so as to be openable and closable is disposed in the vehicle front portion 10. A hinge (not shown) is provided at the rear end portion of the hood 14 in the vehicle front-rear direction, so that the hood 14 can be rotated around an axis in the vehicle width direction of the hinge (not shown). ing.

  As shown in FIG. 2, the hood 14 constitutes the outer plate of the hood 14 and extends along the vehicle front-rear direction, and is disposed below the hood with respect to the hood outer panel 16. And a hood inner panel 18 constituting an inner plate of the hood 14. The front end edge 16A of the hood outer panel 16 and the front end edge 18A of the hood inner panel 18 are coupled by hemming. A hood lock reinforcement 20 is disposed between the hood outer panel 16 and the hood inner panel 18. The hood lock reinforcement 20 has a front side joined to the hood inner panel 18 and a rear end joined to the hood outer panel 16.

  A hood lock portion 30 is disposed corresponding to the center portion of the front end portion 14A of the closed hood 14 in the hood width direction (the same direction as the vehicle width direction). The hood lock unit 30 is a lock striker 32 attached to the hood 14 side, and a hood lock device that is disposed on the radiator support upper 22 side as a vehicle body in the engine room 12 and serves as an engagement device with the lock striker 32. 40.

  The lock striker 32 is disposed on the hood front end side of the hood inner panel 18 (a position away from the front end edge 18A toward the hood rearward side) by a through hole 18B formed through the hood inner panel 18 so that the hood It is inserted from the side and protrudes to the hood lower side with respect to the hood inner panel 18. As a result, the lock striker 32 can be engaged with a main latch 42 (see FIG. 4) as a locking means in the hood lock device 40.

  The lock striker 32 is made of high-strength steel and has a round bar shape, and is bent by a bending machine to have a bent shape (substantially U-shaped) with the hood 14 side open in a side view of the vehicle. More specifically, the lock striker 32 is arranged in a hood front-rear direction and a pair of front and rear legs 36A, 36B arranged so as to stand upright from the hood 14, and a lower part connecting these legs 36A, 36B. A mounting end that extends from the end of the shaft 34 and the pair of legs 36A and 36B opposite to the lower shaft 34 and extends away from each other in the hood width direction (the same direction as the vehicle width direction). Parts 38A and 38B.

  The attachment end portions 38 </ b> A and 38 </ b> B are joined to the hood inner panel 18 and the hood lock reinforcement 20. The lower shaft portion 34 has a rod shape (linear shape) and can come into contact with a lock base 44 (see FIG. 4, which will be described later in detail) in the hood lock device 40. An axial direction of the lower shaft portion 34 (a direction in which the axis 34X extends) is an input direction to the hood 14 from an obliquely upper front side of the vehicle (arrow A direction, in this embodiment, to the hood 14 set in advance for an impact test. Is set to be vertical (substantially vertical in a broad sense) with respect to the impactor collision direction (the same direction as the angle with the horizontal plane inclined at 50 °).

  In the present embodiment, when an impact load of a predetermined value or more is input from the upper side of the hood and the lock striker 32 shown in FIG. 4 moves to the lower side of the vehicle, the lower shaft portion 34 of the lock striker 32 exceeds the predetermined stroke. The lower shaft portion 34 of the lock striker 32 is set so as not to contact the radiator support upper 22 unless it moves (the same applies to the second to fourth embodiments).

  As shown in FIGS. 3 and 4, the lock base 44 in the hood lock device 40 is attached to the radiator support upper 22 side on both sides in the width direction, and in the figure, the radiator support upper 22 side in the lock base 44. Reference numeral 60 denotes a mounting portion. Further, as shown in FIG. 2, in the vehicle side view, the surface direction (arrow C direction) of the mounting surface 44 </ b> B toward the radiator support upper 22 side in the lock base 44 is the input direction to the hood 14 from the upper front side of the vehicle. It is set to match (substantially match in a broad sense) (in the direction of arrow A).

  It should be noted that the load input direction to the lock base 44 when the hood 14 is closed is set closer to the input direction to the hood 14 (in the direction of arrow A) from the diagonally forward upper side of the vehicle. The angle α of the angle formed by the virtual straight line extending in the direction of input to the hood 14 (arrow A direction) and the virtual straight line extending in the load input direction is 0 ° ≦ α ≦ 15 °. It is preferable to set so that the angle α is closer to 0 °.

  As shown in FIG. 4, the lock base 44 has a flat base body 46 between the mounting bases 52 on both sides in the width direction. Most of the edge 46A of the base main body 46 is erected in a peripheral wall shape. At the center in the width direction of the base body 46, a notch 48 that opens at the upper end of the base body 46 and substantially extends in the vehicle vertical direction is formed so as to penetrate in the thickness direction of the lock base 44. In the closed state of the hood 14 (see FIG. 1), the lower shaft portion 34 of the lock striker 32 abuts on the lower end portion 48 </ b> A of the cutout portion 48 so that the lock base 44 can support the lock striker 32. Further, as shown in FIG. 3, the input position B from the lock striker 32 to the lock base 44 is on an extension line 44 </ b> L of the mounting surface 44 </ b> B toward the radiator support upper 22 side in the lock base 44 ( In other words, the offset between the input position and the attachment point is set to zero in a direction perpendicular to the virtual straight line including the extension line 44L (in the extension direction of the extension line 44L).

  As shown in FIG. 4, the main body 42 of the lock base 44 is provided with a main latch 42 on the vehicle rear side. The main latch 42 is supported by the base body 46 (the lock base 44), and is substantially in the vehicle front-rear direction between a normal position serving as an arrangement position in a state in which the hood 14 is locked and a retreat position retracted from the normal position. It can be rotated around the axis. An engaging portion 42A for engaging with the lock striker 32 is formed on the free end side of the main latch 42, and a notch portion 142A into which the lock striker 32 can enter is formed in the engaging portion 42A. . When the main latch 42 rotates by a predetermined angle in the locking direction which is one direction around the vehicle longitudinal axis, the main latch 42 is arranged at the normal position. In this state, the notch 142A in the engaging portion 42A is The lower shaft portion 34 of the lock striker 32 can be held between a notch portion 48 of the lock base 44 and an auxiliary latch (secondary latch) 43 described later.

  One end of a compression coil spring (not shown) is engaged with the main latch 42 at a lower portion of the engaging portion 42A, and the other end of the compression coil spring is engaged with the lock base 44 side. As a result, the compression coil spring urges the main latch 42 toward the normal position, which is always the locking direction. The main latch 42 can be rotated and moved in a direction opposite to the locking direction against a biasing force of the compression coil spring by a predetermined operation.

  On the other hand, a base body portion 46 of the lock base 44 is provided with an auxiliary latch 43 having a substantially inverted L shape when viewed from the front of the vehicle on the vehicle front side. The lower portion of the auxiliary latch 43 is supported by the base main body 46 (lock base 44) and is rotatable about a shaft member 45 whose axial direction is substantially the vehicle front-rear direction. The upper end portion of the auxiliary latch 43 is a hook portion 43A bent in a hook shape, and this hook portion 43A can penetrate the U-shaped inner side of the lock striker 32 and is shown in FIG. 14 is engageable with the engaging portion 20A formed on the base plate 14.

  As shown in FIG. 4, shock absorbing mechanism portions 50 as shock absorbing means are provided on the left and right mounting portions 60 of the lock base 44 toward the radiator support upper 22 side. The shock absorbing mechanism section 50 moves the lock base 44 along the elongated hole 52A while resisting the shock load f when a shock load f of a predetermined value or more is input to the lock base 44 from above the hood 14 (see FIG. 2). To the lower side of the vehicle so as to absorb the energy. The mounting base portion 52 that constitutes a part of the lock base 44 and has a long hole 52A as a penetrating portion, and the long hole 52A. Thus, a bolt 54 and a nut 56 (see FIG. 3) as fastening means for fastening the mounting base 52 and the radiator support upper 22 side are configured. 3 and 4, the lower part of the lock base 44 in a state where the lock base 44 is moved by the impact load f from above the hood 14 (see FIG. 2) is shown by a two-dot chain line, and by the impact load f. The direction in which the lock base 44 is guided and moved is indicated by an arrow X.

  As shown in FIG. 4, the attachment base portion 52 is an end portion on both sides in the vehicle width direction of the lock base 44. The attachment base portion 52 has a substantially vertical direction of the vehicle (the lock base 44 when an impact load is input). A long hole 52A for attachment whose longitudinal direction is the direction in which the vehicle is guided to the vehicle lower side is formed through (longening the tightening hole). The formation direction of the long hole 52A is set to a direction that coincides (substantially coincides) with the input direction (arrow A direction) to the hood 14 from the upper front side of the vehicle in both the vehicle side view and the vehicle front view.

  Further, the bolt 54 has a male screw portion 54A (see FIG. 3) passing through the lower portion of the long hole 52A and the radiator support upper 22 from the front side of the vehicle, and as shown in FIG. 3, the front end side of the male screw portion 54A. The internal thread portion 56A of the nut 56 disposed on the radiator support upper 22 side is screwed together. Here, the head portion 54B of the bolt 54 and the nut 56 sandwich and fasten the attachment base portion 52 and the radiator support upper 22 (acting a fastening load), so that the attachment base portion 52 is attached to the radiator support upper 22 side. That is, adjustment of the fastening load applied to the mounting base 52 and the radiator support upper 22 is performed by torque management (management of tightening torque).

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

  4, the shock absorbing mechanism 50 provided in the mounting portion 60 of the lock base 44 to the radiator support upper 22 has an impact load f (see FIG. 2) of a predetermined value or more on the lock base 44 from above the hood. Since the energy is absorbed by guiding the lock base 44 to the vehicle lower side while resisting the impact load f when input, the collision body 70 collides with the front end portion 14A of the hood 14 as shown in FIG. When an impact load f greater than a predetermined value is input, the impact absorption mechanism 50 absorbs the impact energy by guiding the lock base 44 against the impact load f, and the lock base 44 absorbs the impact. The movement stroke (EA stroke) of the hood 14 is secured by being guided to the vehicle lower side by the mechanism unit 50.

  Here, as shown in FIG. 4, a long hole 52A is formed with the direction in which the lock base 44 is guided to the vehicle lower side as a longitudinal direction, and as shown in FIGS. 3 and 4, the bolt 54 and the nut 56 are Since the attachment base 52 and the radiator support upper 22 are fastened through the long hole 52A, the collision body 70 collides with the vicinity of the front end portion 14A of the hood 14 shown in FIG. 2, and the lock base 44 shown in FIG. Is guided and moved to the vehicle lower side along the direction in which the long hole 52A is guided, the fastening force in the axial direction penetrating the long hole 52A in the bolt 54, that is, the axial force due to the bolt fastening, is almost constant. The reaction force is maintained.

  Further, as shown in FIG. 2, the lock striker 32 is configured such that the axial direction of the lower shaft portion 34 that can come into contact with the lock base 44 is relative to the input direction (arrow A direction) to the hood 14 from the upper front side of the vehicle. Therefore, when the collision body 70 collides with the vicinity of the front end portion 14A of the hood 14, the lock striker 32 efficiently applies the load acting on the lock striker 32 to the lock base 44. Then, the lock base 44 is moved. For this reason, since the input load from the collision body 70 required to move the lock base 44 is reduced, an increase in the reaction force to the collision body 70 is reduced.

  Supplementally, in the engagement state of the lock striker 32 and the main latch 42 shown in FIG. 3, the lock striker 32 cannot transmit a load in the axial direction of the lower shaft portion 34 to the lock base 44. A load is transmitted to the lock base 44 in a direction perpendicular to the axial direction of the lower shaft portion 34. Therefore, if the axial direction of the lower shaft portion 34 of the lock striker 32 is perpendicular (substantially perpendicular) to the input direction (arrow A direction) to the hood 14 from the diagonally upper front side of the vehicle, the lock striker 32 is locked. The base 44 can be pressed efficiently.

  Further, as shown in FIG. 2, when viewed from the side of the vehicle, the surface direction (arrow C direction) of the mounting surface 44 </ b> B to the radiator support upper 22 in the lock base 44 is the input direction to the hood 14 from the upper front side of the vehicle. (The direction of arrow A) coincides (substantially coincides), so that when the colliding body 70 collides with the vicinity of the front end portion 14A of the hood 14, the load input direction from the lock striker 32 to the lock base 44 and the mounting surface on the lock base 44 The surface direction of 44B (arrow C direction) and the direction in which the lock base 44 is guided and moved coincide (substantially match), and the load f from the lock striker 32 to the lock base 44 efficiently moves the lock base 44. . That is, the direction of the input vector from the collision body 70 (see the direction of arrow A) and the direction of the input vector to the lock base 44 that moves the lock base 44 match (substantially match), so the lock base 44 is moved. The input load from the collision body 70 necessary for causing the collision body 70 to be reduced is reduced, and an increase in the reaction force to the collision body 70 is reduced.

  Further, as shown in FIG. 3, the input position B from the lock striker 32 to the lock base 44 is set on an extension line 44 </ b> L of the mounting surface 44 </ b> B to the radiator support upper 22 in the lock base 44 in the vehicle side view. Therefore, when the collision body 70 collides with the vicinity of the front end portion 14A of the hood 14 shown in FIG. 2, in combination with the setting of the surface direction (arrow C direction) of the mounting surface 44B in the lock base 44, FIG. The moment acting on the bolt mounting position D (mounting point) between the lock base 44 and the radiator support upper 22 due to the input of the load f from the lock striker 32 to the lock base 44 shown in FIG.

  Supplementally, the input angle θ formed by the input direction to the lock base 44 (the direction indicated by the arrow f) and the surface direction of the mounting surface 44B of the lock base 44 (the direction of the arrow C) is 0 °. An input position B from the striker 32 to the lock base 44 and an attachment surface 44B of the lock base 44 to the radiator support upper 22 include an extension line 44L of the attachment surface 44B (in the extending direction of the extension line 44L). Since the offset amount S in the direction perpendicular to the virtual straight line is zero, the input load to the lock base 44 is f, the distance between the input position B and the bolt mounting position D is U, and the bolt mounting position D is If the support point moment is M, then M = U × fsin θ + S × f cos θ = 0. For this reason, the lock base 44 moves stably (in the direction of the arrow X) with almost no so-called twisting at the bolt mounting position D when guided to the vehicle lower side by the shock absorbing mechanism 50.

  Next, the energy absorption characteristic (FS characteristic) of the hood lock part structure according to the present embodiment is shown in comparison with the proportionality. FIG. 5 is a graph showing the relationship between the hood lock structure and the proportional FS characteristic according to the present embodiment, that is, the deformation stroke and the load (reaction force). The solid line in FIG. 5 shows the FS characteristic of the hood lock structure according to this embodiment.

  The one-dot chain line K in FIG. 5 which is regarded as a direct comparison is that the lock base is attached when an impact load of a predetermined value or more is input from the upper side of the hood to the lock base of the hood lock device fixed to the vehicle body side. The FS characteristic of the structure which does not move and detach a part is shown. The other dotted line J in FIG. 5, which is regarded as being proportional, is the lock base mounting portion when an impact load of a predetermined value or more is input from the upper side of the hood to the lock base of the hood lock device fixed to the vehicle body side. The FS characteristic of the structure which carries out the rotational movement of the lock base by removing a part of the is shown.

  Further, in the proportional structures each showing the FS characteristic by the one-dot chain line K and the dotted line J in FIG. 5, the axial direction of the lower shaft portion of the lock striker is relative to the input direction to the hood from the diagonally upper front side of the vehicle. In the vehicle side view, the surface direction of the mounting surface to the vehicle body side of the lock base is from the diagonally forward upper side to the hood in the vehicle side view. The input position from the lock striker to the lock base intersects with the input direction, and is set apart from the extension line of the mounting surface of the lock base toward the vehicle body in the side view of the vehicle.

  As shown in FIG. 5, the FS characteristic of the hood lock structure in the present embodiment shows the same curve as that in the first half of the deformation stroke (S) (in the case of the alternate long and short dash line K and the dotted line J). However, in the latter half of the deformation stroke (S), the transition is longer in the vicinity of the ideal load value as compared with the proportionality (in the case of the alternate long and short dash line K and the dotted line J). The hood lock structure in the present embodiment does not quickly reach the bottomed state as in the case of one comparative example (in the case of the one-dot chain line K), so that a predetermined amount of deformation stroke is ensured. As in the case of the proportionality (in the case of the dotted line J), since the reaction force does not become extremely low after separation at a part of the mounting portion of the lock base, an appropriate reaction force is maintained.

  That is, in the hood lock part structure of the present embodiment, the tightening hole is elongated and the tightening torque is managed, so that the load is maintained substantially constant in the second half of the deformation stroke (S).

  Further, in the hood lock portion structure of the present embodiment, the axial direction of the lower shaft portion 34 of the lock striker 32 shown in FIG. 2 is perpendicular to the input direction (arrow A direction) to the hood 14 from the upper front side of the vehicle ( The surface direction (arrow C direction) of the mounting surface 44B to the radiator support upper 22 in the lock base 44 is set to the input direction (arrow A direction) to the hood 14 from the diagonally upper front side of the vehicle. By matching (substantially matching), the load can be suppressed compared to the proportionality shown by the dotted line J in FIG. 5 (when the load required to disengage the lock base is a component of the input to the hood). Can do.

  Furthermore, in the hood lock portion structure of the present embodiment, the surface direction (arrow C direction) of the mounting surface 44B to the radiator support upper 22 in the lock base 44 shown in FIG. The input position B from the lock striker 32 to the lock base 44 shown in FIG. 3 matches the input direction (arrow A direction) to the hood 14 and the radiator support upper 22 in the lock base 44. Is set on the extended line 44L of the mounting surface 44B, so that the so-called twist can be effectively suppressed or prevented as compared with the comparative example shown by the dotted line J in FIG. Can be moved.

  As described above, in the hood lock portion structure according to the present embodiment, when the collision body 70 collides with the vicinity of the front end portion 14A of the hood 14 shown in FIG. In addition, the reaction force to the collision body 70 can be maintained almost constant, and energy can be efficiently absorbed.

[Second Embodiment]
Next, a hood lock structure according to the second embodiment will be described with reference to FIG. The second embodiment is an embodiment of the present invention. FIG. 6 is a front view of the hood lock portion structure according to the second embodiment. As shown in this figure, the hood lock structure according to the second embodiment is provided with a cutout 52B as a penetrating part in place of the long hole 52A (see FIG. 4). This is different from the hood lock structure according to the above. 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 FIG. 6, the mounting portion 60 of the lock base 44 to the radiator support upper 22 is provided with an impact absorbing mechanism portion 62 as an impact absorbing means. The shock absorbing mechanism portion 62 includes an attachment base portion 52 that constitutes a part of the lock base 44, and the attachment base portion 52 is formed in a substantially U shape with an upper side opened in a front view. The attachment base 52 is formed with a notch 52B for attachment having a longitudinal direction substantially in the vehicle vertical direction (direction in which the lock base 44 is guided to the vehicle lower side).

  Further, the bolt 54 passes through the lower portion of the notch 52B and the radiator support upper 22 from the vehicle front side, and is disposed on the radiator support upper 22 side at the tip end side of the bolt 54 as in the first embodiment. A nut 56 (see FIG. 3) is screwed. That is, the bolt 54 and the nut 56 (see FIG. 3) fasten the attachment base 52 and the radiator support upper 22. For this reason, when an impact load f greater than a predetermined value is input to the lock base 44 from the upper side of the hood, the impact absorbing mechanism unit 62 guides the lock base 44 to the vehicle lower side while resisting the impact load f. To absorb. Even with such a configuration, the same operations and effects as the first embodiment described above can be obtained.

[Third Embodiment]
Next, the hood lock structure according to the third embodiment will be described with reference to FIG. Note that the third embodiment is an embodiment of the present invention. FIG. 7 is a front view of the hood lock portion structure according to the third embodiment. As shown in this drawing, the third embodiment is different from the hood lock structure according to the first embodiment in that a third mounting portion 60 is provided on the side of the radiator support upper 22 in the lock base 44. 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 FIG. 7, an overhanging portion 64 extends from the lower portion of the lock base 44 toward one side in the vehicle width direction. The distal end portion of the overhang portion 64 is an attachment piece portion 64A for attachment to the radiator support upper 22 side. The attachment piece 64A is formed with a notch 164A that is notched in a concave shape when viewed from the front so that the vehicle upper side is open. The notch 164A is penetrated by a bolt 66 inserted from the front side of the vehicle. The bolt 66 penetrates the radiator support upper 22, and its tip end is screwed with a nut (not shown). .

  The attachment surface (not shown) of the attachment piece 64A to the radiator support upper 22 is set on an extension line 44L of the attachment surface 44B to the radiator support upper 22 of the attachment base 52 shown in FIG. In addition, in the vehicle side view, the surface direction of the mounting surface in the mounting piece portion 64A shown in FIG. 7 coincides with the surface direction (arrow C direction) of the mounting surface 44B in the mounting base portion 52 shown in FIG. It is set in the direction that is approximately the same.

  The attachment piece 64A is configured to move away from the bolt 66 and move downward in the vehicle when an impact load f greater than a predetermined value is input to the lock base 44 from above the hood. That is, when the impact load f is input, the attachment portion 60 of the attachment piece portion 64A resists the impact load f until the attachment piece portion 64A is detached from the bolt 66, but the attachment piece portion 64A is detached from the bolt 66. After that, the reaction force is not generated and the lock base 44 does not contribute to the vehicle lower side guide.

  According to such a configuration, after the mounting piece 64A is detached from the bolt 66, substantially the same operations and effects as those of the first embodiment described above can be obtained.

[Fourth embodiment]
Next, the hood lock structure according to the fourth embodiment will be described with reference to FIG. Note that the fourth embodiment is not an embodiment of the present invention but a reference example. FIG. 8 is a front view of the hood lock portion structure according to the fourth embodiment. As shown in this figure, one mounting portion 60 (on the left side in the figure) on the radiator support upper 22 side of the lock base 44 receives an impact load f greater than a predetermined value from the upper side of the hood. Even in this case, it is different from the hood lock portion structure according to the first embodiment in that the vehicle does not move downward. Note that 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 FIG. 8, there are three attachment portions 60 on the radiator support upper 22 side in the lock base 44. Of the attachment portion 60 of the lock base 44 to the radiator support upper 22, an attachment piece portion 74 constituting a part of the lock base 44 is disposed on one side in the vehicle width direction (left side in FIG. 8). . The attachment piece 74 is formed with a through hole 74A formed as a round hole in the center thereof. The mounting hole 74A is penetrated by a bolt 76 inserted from the front side of the vehicle. The bolt 76 penetrates the mounting hole 74A and the radiator support upper 22, and the tip end side is screwed by a nut (not shown). Are combined.

Of the attachment portion 60 to the radiator support upper 22 in the lock base 44 on the other side in the vehicle width direction (the right side in FIG. 8), shock absorbing mechanism 80 is provided. The shock absorbing mechanism 80 includes a mounting base 52 that is disposed vertically on the other side of the lock base 44 in the vehicle width direction (the right side in FIG. 8). The elongated holes 52C formed in these mounting bases 52 are formed in an arc shape around a bolt 76 used for mounting the mounting piece 74 to the radiator support upper 22 in the first embodiment. Unlike the long hole 52A (see FIG. 4) in the embodiment, the function of the long hole 52C is substantially the same as the long hole 52A (see FIG. 4) in the first embodiment. Further, the bolt 54 passes through the lower portion of the long hole 52C and the radiator support upper 22 from the front side of the vehicle, and a nut 56 (see FIG. 3) is screwed to the front end side thereof.

  That is, the lock base 44 is attached to the radiator support upper 22 so as to be able to rotate around the bolt 76, and the shock absorbing mechanism 80 receives an impact load f of a predetermined value or more on the lock base 44 from above the hood. When input, the lock base 44 is guided to rotate and move downward in the vehicle while resisting the impact load f to absorb energy.

  Note that the attachment surface (not shown) of the attachment piece 74 to the radiator support upper 22 is on an extension line 44L (see FIG. 3) of the attachment surface 44B of the attachment base 52 to the radiator support upper 22 in a side view of the vehicle. In addition, in the vehicle side view, the surface direction of the mounting surface in the mounting piece 74 shown in FIG. 8 is substantially the same as the surface direction of the mounting surface 44B in the mounting base 52 (see the direction of arrow C in FIG. 3). The direction is set to (substantially match).

  According to the above configuration, since the input direction of the impact load f in the vehicle front view and the moving direction of the lock base 44 do not match, the efficiency for moving the lock base 44 is slightly better than in the first embodiment. However, when the collision body 70 collides with the vicinity of the front end portion 14A of the hood 14 shown in FIG. 2, the reaction force to the collision body 70 can be maintained almost constant, and efficient energy absorption can be performed.

[Supplementary explanation of the embodiment]
As a reference example that is not an embodiment of the present invention, the shock absorbing means is, for example, a separate body from the lock base and is arranged behind the mounting portion of the lock base on the vehicle body side (position on the vehicle rear side). A guide plate that is fixed to the vehicle body and has a through-hole (long hole, notch, etc.) penetrating in the direction in which the lock base is guided to the vehicle lower side; and a through-hole of the guide plate Other impact absorbing means such as an impact absorbing mechanism section provided with a fastener (fastening means) that penetrates and fastens the mounting portion and the guide plate may be used.

  Moreover, in the said embodiment, the volt | bolt 54 penetrates the penetration part (the long hole 52A, the notch part 52B, the long hole 52C) of the attachment base 52 from the vehicle front side, and the nut 56 is screwed by the front end side. The mounting base 52 and the radiator support upper 22 are fastened. For example, instead of providing the nut 56, a female screw portion is formed in the radiator support upper (22) as a vehicle body, and the female screw portion is a bolt (54). ), The attachment base (52) and the radiator support upper (22) may be fastened together. Further, for example, the stud bolt disposed on the vehicle body side penetrates the through portion of the mounting base portion from the vehicle rear side, and the nut is screwed to the tip end side thereof, so that the mounting base portion and the vehicle body side are fastened. It is good also as a simple structure.

  Furthermore, in the above-described embodiment, the input position B from the lock striker 32 to the lock base 44 is set on the extension line 44L of the mounting surface 44B of the lock base 44 to the radiator support upper 22 in the vehicle side view. The input position from the lock striker to the vehicle body side is in the vicinity of the extension line of the mounting surface to the vehicle body side in the lock base (in other words, substantially the same as the case where it is set on the extension line of the mounting surface to the vehicle body side in the lock base) In other words, it may be set at a position close to the extension line that is grasped substantially on the extension line so that the same action and effect can be obtained.

It should be noted that the concept of “substantially vertical” in claim 2 includes “set vertical” as in the above embodiment, and can obtain substantially the same operations and effects as when set vertically. And a direction set to be understood as being substantially vertical.

In addition, the concept of “substantially match” in claim 3 includes “match” as in the above embodiment, and substantially the same operation and effect as in the case of matching are obtained. It is also included that can be grasped as matching.

Incidentally, the hood lock portion structure has a shock absorbing hand stage of claim 1, wherein, and, (1) lock striker is provided with a lower shaft portion of the contact can be rod-shaped lock base, the lower shaft portion the shaft The direction is set to be substantially perpendicular to the input direction to the hood from the obliquely forward upper side of the vehicle to the hood (Claim 2 ), (2) in the vehicle side view, the lock base is mounted on the vehicle body side The surface direction of the surface is substantially matched with the input direction to the hood from the upper front side of the vehicle (Claim 3 ). (3) In the vehicle side view, the input position from the lock striker to the lock base is Another hood lock structure that satisfies at least one of the requirements (1) to (3) in the extension line of the attachment surface to the vehicle body side or in the vicinity thereof (Claim 4 ) may be used. . Further, the hood lock portion structure has the impact absorbing hand stage of claim 1 wherein said (1) through any may even be a hood lock portion structure that does not satisfy the (3).

It is a perspective view showing a front portion of a vehicle having a hood lock portion structure according to a first embodiment. It is an expanded sectional view which follows the 2-2 line of FIG. Is a side view showing the hood lock portion structure according to a first embodiment. FIG. 4 is a view taken along line 4 of FIG. 3. It is a graph showing while the F-S characteristic of the hood lock portion structure according to the first embodiment in comparison with the comparative example. It is a front view (figure seen from the same direction as Drawing 3) of the food lock part structure concerning a 2nd embodiment. It is a front view (figure seen from the same direction as Drawing 3) of the food lock part structure concerning a 3rd embodiment. It is a front view (figure seen from the same direction as Drawing 3) of the food lock part structure concerning a 4th embodiment.

Explanation of symbols

14 Hood 22 Radiator support upper (body)
32 Lock striker 34 Lower shaft part 42 Main latch (locking means)
44 Lock base 44B Mounting surface 44L Extension line 50 Shock absorbing mechanism (shock absorbing means)
52 Mounting base 52A Long hole (through)
52B Notch (penetration)
54 bolts (fastening means)
56 Nut (fastening means)
60 Mounting portion 62 Shock absorbing mechanism (shock absorbing means)
A Input direction to the hood B Input position C Surface direction of the mounting surface f Impact load

Claims (4)

A lock striker attached to the hood and engageable with the locking means on the vehicle body;
A lock base that is attached to the vehicle body side and is provided with the lock means, and is capable of supporting the lock striker in a closed state of the hood,
The lock base is mounted on the vehicle body side of the lock base. When an impact load of a predetermined value or more is input from the upper side of the hood to the lock base, the lock base is moved downward with respect to the impact load. Shock absorbing means for guiding and absorbing energy;
Have,
The shock absorbing means is
Both ends of the lock base in the vehicle width direction are configured, both of which are arranged with the direction in which the lock base is guided to the vehicle lower side as a longitudinal direction, and the direction in which the lock base is guided to the vehicle lower side. An attachment base in which a penetrating portion for attachment in the longitudinal direction is formed, and
Fastening means for fastening the attachment base and the vehicle body side through the penetration part;
Hood lock portion structure comprising a. The lock striker includes a rod-shaped lower shaft portion that can come into contact with the lock base, and an axial direction of the lower shaft portion is set substantially perpendicular to an input direction to the hood from a diagonally upper front side of the vehicle. hood lock portion structure according to claim 1 Symbol mounting, characterized in that is. 3. The vehicle according to claim 1, wherein a surface direction of the mounting surface of the lock base on the vehicle body side substantially coincides with an input direction to the hood from a diagonally upper front side of the vehicle in a side view of the vehicle. The food lock part structure described. The input position from the lock striker to the lock base in a side view of the vehicle is set on or near an extension line of a mounting surface of the lock base toward the vehicle body. The hood lock part structure according to any one of Items 3 .

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