JP5994724B2 - Pop-up hood device for vehicle - Google Patents

Description

  The present invention relates to a vehicle pop-up hood device.

  In the hood flip-up device described in Patent Document 1 below, when the vehicle and the pedestrian are in contact with each other, the actuator is operated to raise the piston rod, and the rear end side of the hood is lifted. At the time of the lifting, the hinge arm of the hood hinge is bent at the plastic deformation portion provided on the front end side while rotating upward around the support shaft. Thus, the hinge arm is allowed to follow the change in the angle of the hood accompanying the lifting, and the lifting of the hood is allowed.

JP 2010-234983 A

  However, in the pop-up hood apparatus for a vehicle as described above, the arrangement height before lifting at the front end portion of the hinge arm (hereinafter referred to as “hood fixing portion”) fastened to the rear end portion of the hood is the rotation center of the hinge arm. When the height is set to be equal to or higher than the height, the hood fixing portion of the hinge arm is displaced toward the vehicle rear side as the hood rear end is lifted by the lifter. As a result, the rotation trajectory of the hood fixing part is greatly separated from the ascending trajectory of the piston rod toward the rear side of the vehicle, and it is difficult to lift the hood smoothly by sliding the tip of the piston rod with respect to the hood fixing part. It may become. In order to prevent this, the rotation center of the hinge arm is set to a height near the center of the arrangement height before and after lifting in the hood fixing part, and the position of the hood fixing part in the vehicle front-rear direction does not change greatly before and after lifting. It is necessary to do so. As a result, the design freedom of the hood hinge decreases.

  The present invention has been made in consideration of the above-described facts, and an object of the present invention is to provide a vehicle pop-up hood device that can improve the design freedom of a hood hinge.

  The pop-up hood device for a vehicle according to the first aspect of the present invention includes a hood whose front end portion is connected to the vehicle body via a hood lock device, and is provided below the rear end portion of the hood and operates. A lifter that raises the rod and lifts the rear end of the hood, and a front end is fixed to the rear end of the hood, and the rear end is rotatably connected to the vehicle body side. And the bend planned portion provided in the intermediate portion in the front-rear direction is bent according to the angle change of the hood accompanying the lifting, so that the front end side is relatively relative to the rear end side than the planned bend portion. And a hood hinge having a hinge arm that is displaced toward the vehicle front side.

  In the first aspect of the present invention, for example, when the vehicle comes into contact with the collision object, the drive source is activated. Then, the rod of the drive source is raised, and the rear end portion of the hood is lifted by the rod. When lifting, the hinge arm, whose front end is fixed to the rear end of the hood, rotates upward with the rear end connected to the vehicle body as the center. Accordingly, the hinge arm bends at the planned bending portion in the middle portion in the front-rear direction. As a result, the front end side of the hinge arm with respect to the planned bending portion is displaced relatively to the vehicle front side with respect to the rear end side, so that the front end portion of the hinge arm fixed to the rear end portion of the hood accompanies the lifting. Displacement toward the vehicle rear side can be prevented or suppressed. As a result, the rotation trajectory of the front end portion of the hinge arm can be prevented from being largely separated from the ascending trajectory of the rod toward the vehicle rear side, so that the hood can be lifted smoothly. Therefore, it is not necessary to set the rotation center of the hinge arm at the height near the center of the arrangement height before and after lifting at the front end portion of the hinge arm, so that the degree of freedom in designing the hood hinge can be improved.

  A vehicle pop-up hood apparatus according to a second aspect of the present invention is the vehicle pop-up hood apparatus according to the first aspect, wherein a lower curved portion that protrudes downward in the vehicle is provided at the front-rear direction intermediate portion of the hinge arm. The planned bending portion is provided in the bending portion.

  In the second aspect of the present invention, when the hood rear end is lifted by the lifter, the hinge arm bends at the planned bending portion provided in the downward bending portion. Since the downward curved portion is convex toward the lower side of the vehicle, the downward curved portion spreads and the longitudinal length of the hinge arm is increased by bending the planned bending portion. Thereby, the front end side of the planned bending portion of the hinge arm can be efficiently displaced toward the vehicle front side with respect to the rear end side. In addition, since the planned bending portion is provided in the downward curved portion, stress can be efficiently concentrated on the planned bending portion.

  A vehicle pop-up hood apparatus according to a third aspect of the present invention is the vehicle pop-up hood apparatus according to the first or second aspect, wherein a front side weak portion is provided on the front end side of the hinge arm in the front end side, The front fragile portion is deformed in accordance with a change in the angle of the hood accompanying lifting.

  In the invention described in claim 3, when the rear end of the hood is lifted by the lifter, the hinge arm bends at the planned bending portion and the front weak portion according to the change in the angle of the hood. Thus, since the hinge arm bends at two places, the hinge arm can be made to follow the hood angle change well.

  According to a fourth aspect of the present invention, in the pop-up hood device for a vehicle according to the third aspect, the hinge arm is provided with an upper curved portion that protrudes toward the vehicle upper side on the front end side of the planned bending portion. The front weakened portion is provided in a region including all or part of the upper curved portion.

  In the invention according to claim 4, since the front weak portion is provided in a region including all or a part of the upper curved portion of the hinge arm, stress can be efficiently concentrated on the front weak portion.

  A vehicle pop-up hood apparatus according to a fifth aspect of the present invention is the vehicle pop-up hood apparatus according to any one of the first to fourth aspects, wherein the planned bending portion has a notch formed in the hinge arm, and the hinge arm is It is provided in the hinge arm by being partially weakened.

  In the invention according to claim 5, since it is configured as described above, the hinge arm can have a simple structure. In addition, since the hinge arm is bent at the planned bending portion and the cutout portion is closed, further deformation of the planned bending portion can be restricted, so that by changing the size of the cutout portion as appropriate, The amount of deformation can be easily adjusted.

  As described above, in the vehicle pop-up hood apparatus according to the present invention, the degree of freedom in designing the hood hinge can be improved.

It is a side view showing a schematic structure of a pop-up hood device for vehicles concerning a 1st embodiment of the present invention. It is a side view which expands and shows the normal state of the pop-up mechanism part arrange | positioned on the right side seeing from the driver side in the same apparatus. It is a top view of the hood hinge which is a structural member of the pop-up mechanism part. It is a side view which shows the state which the hinge arm rotated upwards in the same apparatus, and the rear part side of the food | hood was lifted. (A) is a side view corresponding to FIG. 4 showing a first comparative example, and (B) is a side view corresponding to FIG. 4 showing a second comparative example. (A) is a side view of the hood hinge which is a structural member of the pop-up hood apparatus for vehicles which concerns on 2nd Embodiment of this invention, (B) is a side view which shows the state at the time of the hood lifting completion in the hood hinge It is. (A) is a top view which shows the partial structure of the hinge arm which is a structural member of the pop-up hood apparatus for vehicles which concerns on 3rd Embodiment of this invention, (B) is the arm front part with which the hinge arm is provided It is a side view which shows a partial structure.

<First Embodiment>
A vehicle pop-up hood apparatus 10 according to a first embodiment of the present invention will be described with reference to FIGS. In addition, the arrow FR, arrow UP, and arrow OUT that are appropriately described in each figure respectively indicate the front direction (traveling direction), the upward direction, and the outside in the vehicle width direction of the vehicle. Hereinafter, when the description is made simply using the front-rear direction and the up-down direction, the front-rear direction of the vehicle and the up-down direction of the vehicle are indicated unless otherwise specified.

(Constitution)
As shown in FIG. 1, a vehicle pop-up hood apparatus 10 includes a hood 12 that covers an engine room so that it can be opened and closed, and pops up (lifts) a rear end of the hood 12 when the vehicle collides with a collision object such as a pedestrian. And a pop-up mechanism section 14 to be increased). The hood 12 is configured by combining a hood outer panel 16 that is disposed outside the vehicle and forms a design surface, and a hood inner panel 18 that is disposed on the engine room side and reinforces the hood outer panel 16.

  The hood 12 is configured such that a front end portion is connected to the vehicle body side via a hood lock device 20. The hood lock device 20 includes a striker 22 fixed to the front end portion of the hood 12 and a latch 26 rotatably supported on the upper end portion of the radiator support 24, and the latch 26 is caught by the striker 22. The front end of the hood 12 is connected to the radiator support 24. As a result, the hood 12 is restrained to the closed position (position shown in FIG. 1).

  On the other hand, the pop-up mechanism unit 14 includes a hood hinge 28 that supports the hood 12 so that the hood 12 can be opened and closed, and a lifter 30 that operates when the pedestrian or other collision object collides. The pop-up mechanism 14 is disposed on both the left and right sides of the rear end side of the hood 12, but the left and right pop-up mechanisms 14 are configured symmetrically. For this reason, in the following description, the configuration of the pop-up mechanism portion 14 disposed on the right side of the vehicle body (right side as viewed from the driver side) will be described, and the description of the configuration of the pop-up mechanism portion 14 disposed on the left side of the vehicle body will be omitted.

  As shown in FIG. 2, the hood hinge 28 is connected to a hinge base 34 fixed to the upper surface portion 32 </ b> A of the cowl top side 32 and to the hinge base 34 via a hinge pin (rotation center axis) 36 so as to be relatively rotatable. And a hinge arm 38 connecting the hinge base 34 and the rear end of the hood 12. The cowl top side 32 is a vehicle body side component member provided on both sides of the cowl extending along the vehicle width direction between the rear end portion of the hood 12 and the lower end portion of the windshield glass. . The hood hinge 28 is essentially a hinge part for supporting the hood 12 so as to be openable and closable on the vehicle body. In the present embodiment, the hood hinge 28 is also a component of the vehicle pop-up hood device 10.

  The hinge base 34 is made of a sheet metal material and has a substantially L shape when the vehicle is viewed from the front. The hinge base 34 includes a mounting portion 34A whose plate thickness direction extends in the vehicle vertical direction, and a support portion 34B extending from the inner end in the vehicle width direction of the mounting portion 34A to the vehicle upper side. Yes. The mounting portion 34A is fixed to the upper surface portion 32A of the cowl top side 32 by mounting bolts (not shown).

  The hinge arm 38 is formed of a sheet metal material in a long shape having the longitudinal direction in the vehicle front-rear direction. The hinge arm 38 is formed in a substantially L shape (a “height” shape that is upside down) in a side view. Structurally, the hinge arm 38 is formed by bending a side wall portion 38A arranged in parallel to the support portion 34B of the hinge base 34 and an upper edge portion of the side wall portion 38A inward in the vehicle width direction. And a lower wall portion 38C formed by being bent inward in the vehicle width direction from the lower edge portion of the side wall portion 38A. It is made into the substantially U shape (U-shape) by which the width direction inner side was open | released. Further, the inner edge in the vehicle width direction of the front end portion of the top wall portion 38B is bent downward, and an inner flange portion 38D parallel to the side wall portion 38A is formed. Accordingly, the front end portion of the hinge arm 38 has a substantially U-shaped (U-shaped) cross-sectional shape in which the vehicle lower side is opened.

  A connecting portion 37 is provided at the rear end portion of the side wall portion 38 </ b> A of the hinge arm 38. The connecting portion 37 is hinged to the upper end portion of the support portion 34B of the hinge base 34 by a hinge pin 36 whose axial direction is along the vehicle width direction. Therefore, the hinge arm 38 can be rotated (rotated) in the vehicle vertical direction with the hinge pin 36 as the rotation center.

  The front portion of the top wall portion 38B of the hinge arm 38 is a hood fixing portion 39 that is fastened to the hinge fixing portion 18A provided at the rear end portion of the hood 12. The hood fixing portion 39 extends substantially in the vehicle front-rear direction along the lower surface of the hinge fixing portion 18A. As shown in FIG. 3, a pair of front and rear bolt holes 40 are formed in the hood fixing portion 39, and hinge bolts (not shown) inserted through these bolt holes 40 are welded to the hinge fixing portion 18A. It is screwed into a weld nut (not shown). Accordingly, the front end portion of the hinge arm 38 is fastened and fixed to the rear end portion of the hood 12.

  Further, the lower surface of the hood fixing portion 39 is a push-up surface 42 that is pushed up by a tip portion (press portion 62A) of a rod 62 described later. In the present embodiment, in a state where the hood 12 is located at the closed position (the state shown in FIGS. 1 and 2), the push-up surface 42 is configured to be located slightly below the vehicle relative to the hinge pin 36.

  The middle part of the hinge arm 38 in the front-rear direction (longitudinal direction middle part) has an upper curved part 44 projecting upward in the vehicle, and a downward curve projecting downward in the vehicle on the rear end side of the upper curved part 44. Part 46 is provided. The upper bending portion 44 is provided in the vicinity of the rear of the hood fixing portion 39, and the lower bending portion 46 is provided in the vicinity of the center between the upper bending portion 44 and the connecting portion 37.

  In the hinge arm 38, as shown in FIG. 3, a cut portion 48 cut from the outside in the vehicle width direction is formed in the vicinity of the center portion in the front-rear direction of the hood fixing portion 39. Further, a step portion 50 in which the width dimension of the hinge arm 38 is reduced is formed near the rear end of the inner flange portion 38D. A region between the stepped portion 50 and the notched portion 48 (near the dotted line in FIG. 3) is a front weak portion 52. The front weak portion 52 is provided in a region including the front portion of the upper curved portion 44.

  Further, in the hinge arm 38, a notch 54 is formed at the lower edge of the central portion in the bending direction of the downward bending portion 46, and the upper periphery of the notch 54 in the hinge arm 38 is the rear weak portion 56 ( It is supposed to be bent). The hinge arm 38 is partially weakened (weakened) in the rear weak portion 56 and the front weak portion 52 described above. The notch 54 is notched from the lower edge side to the upper edge side of the lower curved portion 46 in a state straddling the ridgeline between the side wall part 38A and the lower wall part 38C.

  In the hood hinge 28 having the above configuration, as shown in FIG. 2, the hood fixing portion 39 (fastening portion between the rear end portion of the hood 12 and the hinge arm 38) is normally positioned on the vehicle lower side than the hinge pin 36. ing. In this state, when an upward load equal to or greater than the set value is input to the rear end portion of the hood 12, the hinge arm 38 rotates upward around the hinge pin 36, and the rear end portion of the hood 12 is the hood lock device 20. It is pushed up around.

  Thereby, the angle of the hinge arm 38 with respect to the rear end portion of the hood 12 changes, and a bending load acts on the hinge arm 38. This bending load concentrates on the front weak portion 52 and the rear weak portion 56 of the hinge arm 38, and the hinge arm 38 bends at the front weak portion 52 and the rear weak portion 56 (see FIG. 4). As a result, the hinge arm 38 is allowed to rotate upward, and the hood fixing portion 39 of the hinge arm 38 rises together with the rear end portion of the hood 12.

  On the other hand, the lifter 30 is disposed below the push-up surface 42 of the hinge arm 38 as shown in FIG. The lifter 30 is provided with a housing 58 that is formed in a substantially cylindrical shape and is disposed with the vehicle vertical direction as the axial direction. A bracket 60 is integrally provided on the housing 58, and the bracket 60 is fixed to the side surface portion 32 </ b> B of the cowl top side 32 with a bolt. Inside the housing 58, a gas generating means composed of a gas generating agent and an ignition device for generating gas by burning the gas generating agent are disposed. In addition to the type using the gas generating agent, it is also possible to use a type in which the high-pressure gas is sealed in the housing 58 and the ignition device is operated to break the partition walls separating the high-pressure gas. is there.

  The ignition device that operates the lifter 30 is connected to an ECU (control means) (not shown) disposed below the console box. The ECU is connected to a collision detection sensor (collision detection means) that is disposed on a front bumper or the like and detects or predicts a collision with a collision object such as a pedestrian.

In addition, a rod 62 (see FIG. 3) formed in a straight bar shape is accommodated coaxially in the housing 58. A piston (not shown) that is tightly accommodated in the housing 58 is provided at the lower end of the rod 62. The piston and rod 62 are supported so as to be axially movable with respect to the housing 58. When the rod 62 is maximally stroked upward with respect to the housing 58, a hook (not shown) provided in the housing 58 is engaged with the piston. Thereby, the lowering of the rod 62 is prevented.
A pressing portion 62 </ b> A having a larger diameter than the main body portion of the rod 62 is attached to the upper end portion (tip portion) of the rod 62. The pressing portion 62A faces the push-up surface 42 of the hinge arm 38 from below, and is disposed at a position shifted in the hood width direction (a position not overlapping) with respect to the above-described hinge bolt in the vehicle plan view. Yes.

  In the above-described lifter 30, when gas is generated in the housing 58, the pressure of the gas acts on the piston tightly accommodated in the housing 58 and presses the piston toward the front end side (upper side) in the axial direction of the housing 58. . Since the lower end portion of the rod 62 is connected to the piston, when the piston moves up in the housing 58, the rod 62 moves in the axial direction upward, and the pressing portion 62A at the tip portion of the rod 62 moves up. It is like that.

(Function and effect)
Next, the operation and effect of this embodiment will be described.

  As shown in FIG. 2, when the vehicle pop-up hood device 10 is in an inoperative state, the lifter 30 is in an inoperative state, so that the rod 62 is accommodated in the housing 58 of the lifter 30 (the pressing portion 62A The lower surface is in contact with the upper end of the housing 58 of the lifter 30).

  From this state, when a collision object such as a pedestrian collides with a vehicle, a collision detection unit (not shown) detects that the collision object and front collision have occurred, and a collision signal is output to an ECU (not shown). The ECU determines whether or not the vehicle pop-up hood device 10 should be operated based on the input collision signal. When the ECU determines that the vehicle pop-up hood device 10 should be operated, an operation signal is output to the lifter 30. The Thereby, an ignition device (not shown) in the lifter 30 is ignited, and the gas generating agent is burned to generate a predetermined amount of gas in the housing 58.

  When the lifter 30 is a high-pressure gas-filled type, a predetermined amount of gas is generated in the housing 58 when the partition wall is broken or the like by operating the ignition device. When a pre-crash sensor is installed, the above operation is performed when a frontal collision is predicted.

  The gas generated as described above acts on the piston tightly accommodated in the housing 58 and presses the piston toward the axial front end side (that is, the upper side) of the housing 58. Since the lower end portion of the rod 62 is connected to the piston, when the piston moves up in the housing 58, the rod 62 moves in the axial direction toward the upper side. As a result, the pressing portion 62A at the tip of the rod 62 contacts the push-up surface 42 of the hinge arm 38, and the hinge arm 38 is rotated upward around the hinge pin 36 so that the rear end of the hood 12 is moved upward. To be lifted.

  At the time of the lifting, the hinge arm 38 having the hood fixing portion 39 fixed to the rear end portion of the hood 12 rotates upward about the rear end portion connected to the vehicle body side, and the hood accompanying the lifting. The hinge arm 38 bends at the rear weak portion 56 in accordance with the 12 angle change. As a result, the front end side of the hinge arm 38 displaces relative to the rear end side relative to the rear end side relative to the rear end weak portion 56, so that the hood fixing portion 39 fixed to the rear end portion of the hood 12 is lifted up. Accordingly, displacement to the vehicle rear side can be prevented or suppressed.

  As a result, as shown in FIG. 4, the rotation trajectory T of the hood fixing portion 39 can be prevented from being largely separated from the ascent trajectory R of the rod 62 toward the vehicle rear side, so that the hood 12 can be lifted smoothly. It becomes possible. Accordingly, it is not necessary to set the hinge pin 36 at a height near the center of the arrangement height before and after the hood fixing portion 39 is lifted, so that the design freedom of the hood hinge 28 can be improved.

  The above effect will be described in detail. As in the first comparative example shown in FIG. 5A, in the state where the hood 12 is located at the closed position, the hinge pin 36 is set to a height near the center of the arrangement height before and after the hood fixing portion 39 is lifted. In the configuration, the rotation trajectory T of the hood fixing portion 39 substantially coincides with the ascent trajectory R of the rod 62, so that the hood 12 can be lifted smoothly. On the other hand, as in the second comparative example shown in FIG. 5B, in the state where the hood 12 is positioned at the closed position, the hood fixing portion 39 is positioned at a height equal to or higher than the hinge pin 36. As the hood 12 is lifted, the hood fixing portion 39 is displaced toward the rear side of the vehicle. Therefore, the pressing portion 62A of the rod 62 slides carelessly with respect to the hood fixing portion 39, so that it is difficult to lift the hood 12. For this reason, the hinge pin 36 must be set as in the first comparative example shown in FIG. In this respect, in the present embodiment, as described above, the hood fixing portion 39 can be prevented or suppressed from being displaced toward the vehicle rear side with the lifting, so that the degree of freedom in setting the arrangement height of the hinge pin 36 can be improved. The degree of freedom in designing the hood hinge 28 can be improved.

  Further, in the present embodiment, the rear weak portion 56 is provided in the downward bending portion 46 provided in the intermediate portion in the front-rear direction of the hinge arm 38. Since this downward curved portion 46 is convex toward the vehicle lower side, when the rear weak portion 56 is bent, the downward curved portion 46 spreads and the longitudinal length of the hinge arm 38 becomes longer. As a result, the front end side of the rear weak portion 56 in the hinge arm 38 can be efficiently displaced toward the vehicle front side with respect to the rear end side. In addition, since the rear weak portion 56 is provided in the downward curved portion 46, stress can be efficiently concentrated on the rear weak portion 56.

  Further, in the present embodiment, the front fragile portion 52 is provided on the front end side of the hinge arm 38 with respect to the rear fragile portion 56, and when the rear end of the hood 12 is lifted by the lifter, The hinge arm 38 bends at the rear weak portion 56 and the front weak portion 52 in accordance with the angle change. Thus, since the hinge arm 38 bends in two places, the hinge arm 38 can be made to follow the angle change of the hood 12 favorably.

  In the present embodiment, the hinge arm 38 is provided with an upper curved portion 44 that protrudes upward from the vehicle on the front end side of the rear weak portion 56, and a part of the upper curved portion 44 ( Here, since the front weak portion 52 is provided in a region including the front portion), stress can be efficiently concentrated on the front weak portion 52.

  Further, in the present embodiment, since the notched portion 54 is formed in the hinge arm 38 and the hinge arm 38 is partially weakened to provide the rear weak portion 56, the hinge arm 38 has a simple structure. Can be. In addition, as shown in FIG. 4, the hinge arm 38 is bent at the rear fragile portion 56 and the notch 54 is closed, so that further deformation of the rear fragile portion 56 can be restricted. By appropriately changing the size, the deformation amount of the rear weak portion 56 can be easily adjusted.

<Supplementary explanation of the first embodiment>
In the first embodiment, the hinge arm 38 is provided with the upper bending portion 44 and the lower bending portion 46. However, the present invention is not limited to this, and the shape of the hinge arm can be changed as appropriate. For example, the hinge arm may be linearly formed.

  Moreover, in the said 1st Embodiment, although it was set as the structure by which the front weak part 52 was provided in the hinge arm 38, this invention is not restricted to this, You may make it the structure by which the front weak part was abbreviate | omitted.

  Moreover, in the said embodiment, although it was set as the structure by which the rear side weak part 56 as a bending plan part was provided by forming the notch part 54 in the hinge arm 38, this invention is not limited to this, For example, a hinge A configuration may be adopted in which a portion to be bent is provided by forming a part of the arm 38 to be narrow.

  Next, another embodiment of the present invention will be described. In addition, about the structure and effect | action similar to the said 1st Embodiment, the same code | symbol as the said 1st Embodiment is provided, and the description is abbreviate | omitted.

<Second Embodiment>
FIGS. 6A and 6B are schematic side views showing a hood hinge 70 that is a constituent member of a vehicle pop-up hood apparatus according to a second embodiment of the present invention. In the hood hinge 70, the configuration of the hinge arm 72 is different from that of the hinge arm 38 according to the first embodiment.

  The hinge arm 72 includes an arm front portion 74 and an arm rear portion 76 that are separately formed, and the rear end portion of the arm front portion 74 and the front end portion of the arm rear portion 76 are connected by a connecting pin 78. It has become. A hood fixing portion 39 to which a rear end portion of the hood 12 (not shown in FIG. 6) is fixed is provided at the front end portion of the arm front portion 74, and a hinge pin 36 is provided at the rear end portion of the arm rear portion 76. A connecting portion 37 connected to the hinge base 34 is provided. In the hinge arm 72, a connecting portion between the arm front portion 74 and the arm rear portion 76 is a planned bending portion 80. The planned bending portion 80 is set at the same position as the planned bending portion 56 in the first embodiment.

  The connecting pin 78 has an axial direction along the vehicle width direction, and the arm front portion 74 can rotate relative to the arm rear portion 76 around the connecting pin 78 (around the axis line along the vehicle width direction). ing. However, the pair of protrusions 76A and 76B protruding from the front end portion of the arm rear portion 76 are in contact with the rear end portion of the arm front portion 74 from both sides in the circumferential direction of the connecting pin 78. For this reason, the relative rotation of the arm front part 74 with respect to the arm rear part 76 is normally restricted.

  On the other hand, when the rear end of the hood 12 is lifted by the lifter 30, a load from the arm front portion 74 that attempts to follow the angle change of the hood 12 is input to one of the protrusions 76 </ b> A. As a result, when one of the protrusions 76A breaks, as shown in FIG. 6B, the hinge arm 72 is bent at the planned bending portion 80, so that the arm front portion 74 is relative to the arm rear portion 76. To the front side of the vehicle. Then, when the stopper portion 76 </ b> C protruding from the front end portion of the arm rear portion 76 contacts the arm front portion 74, the relative rotation of the arm front portion 74 with respect to the arm rear portion 76 is restricted. In this embodiment, the configuration other than the above is the same as that of the first embodiment.

  Also in this embodiment, when the rear end portion of the hood 12 is lifted, the arm front portion 74 is displaced relative to the vehicle rear side with respect to the arm rear portion 76, so that the hood fixing portion 39 of the arm front portion 74 is rearward of the vehicle. Displacement to the side can be prevented or suppressed. Therefore, in this embodiment, basically the same effect as that of the first embodiment can be obtained.

<Third Embodiment>
FIG. 7A is a schematic plan view showing a partial configuration of a hinge arm 90 that is a constituent member of a vehicle pop-up hood device according to a third embodiment of the present invention. As with the hinge arm 72 according to the second embodiment, the hinge arm 90 includes an arm front part 92 and an arm rear part 94 that are separately formed, and a rear end part and an arm rear part of the arm front part 92 are provided. The front end portion of 94 is connected by a bolt 96 and a nut 98. The rear end portion of the hood 12 (not shown in FIG. 7) is fixed to the front end portion of the arm front portion 74, and the hinge base 34 (FIG. 7) is connected to the rear end portion of the arm rear portion 76 via a hinge pin 36. In these figures, both are not shown). In the hinge arm 90, a connecting portion between the arm front portion 92 and the arm rear portion 94 is a planned bending portion 100. The planned bending portion 100 is set at the same position as the planned bending portion 56 in the first embodiment.

  The bolt 96 has an axial direction along the vehicle width direction, and the arm front portion 92 is rotatable relative to the arm rear portion 94 around the bolt 96 (around the axis line along the vehicle width direction). However, meshing teeth 102 are formed on opposite surfaces of the rear end portion of the arm front portion 92 and the front end portion of the arm rear portion 94, respectively, and between the head portion of the bolt 96 and the arm front portion 92. The meshing state of the meshing teeth 102 is maintained by the compression coil spring 104 interposed therebetween. These meshing teeth 102 are constituted by a plurality of teeth arranged in the circumferential direction of the bolt hole 106 through which the bolt 96 is inserted (see FIG. 7B), and the arm front portion 92 with respect to the arm rear portion 94 is normally provided. Relative rotation is restricted.

  On the other hand, when the rear end portion of the hood 12 is lifted by the lifter 30, a load from the arm front portion 92 that attempts to follow the angle change of the hood 12 acts between the meshing teeth 102, thereby compressing the coil spring. 104 is compressed and deformed. As a result, relative rotation of the arm front part 92 with respect to the arm rear part 94 is permitted, and the arm front part 92 is displaced toward the vehicle front side relative to the arm rear part 94 by bending the hinge arm 72 at the planned bending part 80. (Rotate. In this embodiment, the configuration other than the above is the same as that of the first embodiment.

  Also in this embodiment, when the rear end portion of the hood 12 is lifted, the arm front portion 92 is displaced relative to the front side of the vehicle relative to the arm rear portion 94, so that the arm front portion to which the rear end portion of the hood 12 is fixed is fixed. It is possible to prevent or suppress the front end portion of the portion 92 from being displaced toward the vehicle rear side. Therefore, in this embodiment, basically the same effect as that of the first embodiment can be obtained.

  While the present invention has been described with reference to several embodiments, the present invention is not limited to these embodiments, and various modifications can be made without departing from the scope of the present invention. It goes without saying that the scope of rights of the present invention is not limited to the above embodiments.

DESCRIPTION OF SYMBOLS 10 Pop-up hood apparatus for vehicles 12 Hood 20 Hood lock apparatus 28 Hood hinge 30 Lifter 38 Hinge arm 46 Downward curved part 54 Notch part 56 Back side weak part (bending plan part)
70 Hood Hinge 72 Hinge Arm 80 Bending Planned Part 90 Hinge Arm 100 Bending Plane Part

Claims (5)

A hood whose front end is connected to the vehicle body via a hood lock device;
A lifter that is provided below the rear end of the hood and lifts the rear end of the hood by operating to raise the rod;
The front end portion is fixed to the rear end portion of the hood, the rear end portion is rotatably connected to the vehicle body side, rotates upward with the lifting, and is provided with a planned bending portion at the intermediate portion in the front-rear direction. A hood hinge having a hinge arm whose front end side is displaced relative to the rear end side relative to the rear end side relative to the rear end side by bending according to the angle change of the hood accompanying the lifting;
Pop-up hood device for vehicles equipped with.   2. The vehicle pop-up according to claim 1, wherein a lower curved portion that protrudes downward in the vehicle is provided at a middle portion in the front-rear direction of the hinge arm, and the bent portion is provided in the lower curved portion. Food equipment.   The front weak part is provided in the front end side rather than the said bending plan part in the said hinge arm, The said front weak part deform | transforms according to the angle change of the said hood accompanying the said lifting. The vehicle pop-up hood device described in 1.   The hinge arm is provided with an upper curved portion that protrudes toward the vehicle upper side on the front end side with respect to the planned bending portion, and the front weak portion is in a region including all or part of the upper curved portion. The pop-up hood apparatus for vehicles of Claim 3 provided.   The said bending planned part is provided in the said hinge arm by the notch part being formed in the said hinge arm, and the said hinge arm being partially weakened. The pop-up hood apparatus for vehicles as described.

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