JP2009096339A - Vehicle hood flip-up device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle hood flip-up device capable of reducing overrun generated when a hood is flipped up. <P>SOLUTION: The vehicle hood flip-up device has a first stopper mechanism 30 for regulating a rear section of a flipped-up hood 10 at the predetermined position, and a second stopper mechanism 30 for regulating the movement of a front section of the flipped-up hood 10 backward of a vehicle body. When the hood is flipped up, the front and rear section of the hood 10 are regulated to suppress overrun at each section of the hood generated when the hood 10 is suddenly stopped. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle hood flip-up device for protecting a pedestrian.

In recent years, in automobiles (vehicles), assuming a collision with a pedestrian, the rear end portion of the front hood is jumped to the front hood that covers the upper surface opening of the device housing part such as the engine room formed in the front part of the vehicle body Attempts have been made to install a hood flip-up device to raise.
Specifically, in general, the front hood that covers the opening on the upper surface of the front portion of the vehicle body is, as disclosed in Patent Document 1, before the front end portion is locked by a hood lock mechanism that combines a striker and a latch when closed. An opening formula may be used.

The hood jumping device lifts the rear end of the hood while the front end is locked in the event of a collision with a pedestrian. , I will try to catch it safely with this front hood.
Many of the flip-up mechanisms used in such hood flip-up devices use an actuator such as an inflator to jump up the rear end of the front hood instantaneously, and then use the hood guide mechanism to turn the hood up into a hood lock mechanism. A structure is used that moves upward in the locked state. Then, the rear portion of the hood that is flipped up is stopped at a predetermined position by the stopper mechanism.

In the hood flip-up device, taking into account the behavior of a pedestrian who falls further, it is being promoted to add a movement to move the front hood up to the rear of the vehicle body. For example, Patent Document 2 employs a hood guide mechanism in which a link member connects the front hood and the vehicle body, and the fulcrum position of the vehicle body of the link member is arranged on the rear side of the vehicle body from the fulcrum position of the front hood. The movement of moving the vehicle to the rear of the vehicle body (by the movement of drawing the arc of the link member) is being added to the raised front hood.
JP 2001-1949 A JP 59-26370 A

The hood flip-up device that flips the front hood upward while accompanying the movement to move to the rear of the vehicle body matches the behavior of a pedestrian who falls to the vehicle side, so the movement of the front hood matches the safety of the pedestrian who falls. In that respect, it becomes better.
However, even if the front hood flipped up by the hood flip-up device is suddenly stopped by the stopper mechanism, the entire front hood has an inertial force upward.

  For this reason, even if the rear end portion of the front hood stops, the front side does not stop due to the inertial force, so that overrun occurs in each part of the front hood due to the difference in behavior. In particular, since the front hood is configured by combining plate-like panel members that extend in the longitudinal direction of the vehicle body, the central portion of the front hood in the longitudinal direction is a relatively weak portion, and this portion is affected by overrun. There is a tendency to occur.

  Specifically, since the overrun applies a load to the front hood, the same load causes the front-rear center of the weak front hood to deform into a chevron or elastic deformation of the same part even if it does not lead to deformation. By repeating the above, the front hood is vibrated up and down for a considerably long period. This deformation or vibration tends to affect a pedestrian who has fallen into the front hood.

  The overrun also affects the accidental activation of the hood flip-up device. In other words, if the hood flip-up device is accidentally activated (erroneous explosion), it is usually sufficient to return the raised front hood to its original position. However, the overrun that occurs when the hood jumps up causes permanent deformation of the front hood. Cheap. For this reason, once the front hood jumps up, it cannot be restored to its original state, and the front hood is often replaced.

  In particular, a front hood that has been improved in impact safety in recent years, specifically, a folding assisting part that facilitates folding and a folding assisting part such as an opening are formed at the center in the front-rear direction of the front hood. An automobile equipped with a front hood in which the amount of retraction at the rear of the front hood is reduced by folding the center of the front hood upward at the time of a frontal collision is easily affected by the overrun described above.

In the field of automobiles, various techniques have been proposed for preventing the hood from retreating at the time of a frontal collision of the automobile.
SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle hood flip-up device that can reduce overrun that occurs when the hood is flipped up.

In order to achieve the above-mentioned object, the invention according to claim 1 can move the rear part of the hood that is flipped up to the rear of the vehicle body in addition to the first stopper mechanism that regulates the rear part of the hood that is flipped up at a predetermined position. A second stopper mechanism for regulating was provided.
With this configuration, overrun at each part of the hood that occurs when the hood suddenly stops when the hood is flipped up can be suppressed.

  The invention according to claim 2 is characterized in that the hood lock mechanism includes a striker provided in the hood so that an overrun occurring in the hood can be suppressed by effectively utilizing the parts of the hood lock mechanism that are normally used. The second stopper mechanism is provided with a damper on the rear vehicle body part from the striker, and a striker that is displaced rearward along with the hood that is flipped up is a damper. The structure which contacts the part was used.

The invention according to claim 3 has a simple structure and the second stopper mechanism corresponds to the front portion of the hood and the front portion so as to face each other in the front-rear direction of the vehicle body so that overrun occurring in the hood is suppressed. A configuration is adopted in which a damper portion is provided on one of the opening edge portions of the opening to be formed and an abutting portion capable of abutting against the damper portion is formed on the other.
In the invention according to claim 4, after the second stopper mechanism restricts the movement of the front portion of the hood so that the occurrence of overrun can be suppressed most effectively, the first stopper mechanism is arranged at the rear portion of the hood. The movement of was controlled.

  The invention described in claim 5 uses a hood having a folding assisting portion.

According to the invention of claim 1, by restricting the front and rear portions of the hood with the first and second stopper mechanisms, the inertia force of the hood toward the rear of the vehicle body can be reduced when the hood is flipped up. The overrun in each part of the hood that occurs when stopping can be reduced.
As a result, deformation of the hood and vibration of the hood due to overrun can be suppressed, and the safety of a pedestrian who falls into the hood can be improved. In addition, even when the hood flip-up device is operated by mistake, the occurrence of permanent deformation of the hood due to overrun can be suppressed, so that the hood can be easily returned to the original state.

According to the invention of claim 2, overrun that occurs in the hood can be easily suppressed by effectively utilizing the striker of the hood lock mechanism that is normally used.
According to the invention of claim 3, the overrun generated in the hood has a simple structure in which the damper portion is provided on one of the front portion of the hood and the opening edge portion of the opening and the contact portion is formed on the other. Can be suppressed.

According to the invention of claim 4, since the rear portion of the hood is regulated after the front portion of the hood is regulated, the hood that is flipped up has a pulling force to the rear of the vehicle body immediately after the front portion is regulated. Since it is stretched in the front-rear direction, the hood overrun can be most effectively suppressed and the occurrence of permanent deformation of the hood can be suppressed.
According to invention of Claim 5, even if it is a hood which has a folding assistance part and was easy to deform | transform, generation | occurrence | production of the permanent deformation of a hood can be suppressed effectively.

The present invention will be described below based on the first embodiment shown in FIGS.
FIG. 1 shows a front portion of an automobile (vehicle), in which 1 denotes a vehicle body, and 2 denotes a device accommodating portion formed at the front portion of the vehicle body 1, for example, an engine room.
The engine room 2 is surrounded by front fenders 3 on both the left and right sides, a front front bumper 4 and a rear dash panel (not shown). In the engine room 2, devices such as an engine and a transmission (both not shown) are accommodated. Further, a bar-shaped radiator core support member 5 (a member constituting the vehicle body) is provided in the vehicle width direction adjacent to the front bumper 4 at the front portion of the engine room 2. The radiator core support member 5 supports a radiator, a condenser of an air conditioner (both not shown), and the like.

The front bumper 4 includes an impact sensor 6 that detects a collision with a pedestrian. The impact sensor 6 is connected to a control unit, for example, an ECU 7 that controls an automobile engine or the like.
A front hood 10 (corresponding to the hood of the present application) that covers the engine room 2 is provided on the upper surface of the front portion of the vehicle body 1. The front hood 10 will be described. The front hood 10 is formed in a flat plate shape by joining a hood outer panel 10b formed of a thin plate similarly to the hood inner panel 10a formed of a thin plate as shown in FIG. . Further, as shown in FIG. 1 and FIG. 9, in the hood inner panel 10 a, the folding promoting portion 10 c formed by, for example, a bead or an opening is provided at the center of the vehicle body in the longitudinal direction of the vehicle in the vehicle width direction. Is formed, and the center of the hood is folded upward at the time of a frontal collision of the automobile, thereby reducing the amount of retraction of the rear portion of the hood.

  Both ends of the rear portion of the front hood 10 are rotatably supported by hinge structures 11 provided on the left and right vehicle body portions of the engine room 2. Thereby, it is set as the front hood 10 of the front opening structure. The front hood 10 closes the engine room 2 opened on the front upper surface of the vehicle body 1 as shown in FIG. The center of the front end of the closed front hood 10 is detachably locked by a hood lock mechanism 13 provided at the center of the radiator core support member 5 in the vehicle width direction.

  As shown in FIGS. 1 and 6 to 8, the hood lock mechanism 13 includes a striker 14 attached to the lower surface of the front end of the front hood 10 and a radiator core support member 5 that forms an opening edge of the engine room 2. It is combined with the installed latch unit 20. As shown in FIGS. 6 to 8, the striker 14 is combined with a pair of front and rear leg portions 15 protruding from the lower surface of the front hood 10 and a bar-shaped engaging / disengaging portion 16 that connects between the distal end portions of the leg portions 15. Used parts. The latch unit 20 is housed in a casing 21 that is bolted to the front side surface of the radiator core support member 5 and that is formed by bending a sheet metal, and is rotatable in a direction intersecting the striker 14 in the casing 21. And a plate-shaped latch 22. Of these, an engaging recess 23 that opens in the lateral direction is formed in the upper portion of the latch 22 that has an arc shape. The engagement recess 23 of the latch 22 is kept constant by a biasing force of a biasing member (not shown) so that the opening faces sideways, and the striker 14 enters the entrance path 21 a formed on the front wall of the casing 21. Then, the latch 22 is rotationally displaced by the reaction, and the engagement / disengagement portion 16 of the striker 14 is engaged with the engagement recess 23 of the latch 22. The engaging / disengaging portion 16 of the striker 14 at this time is restricted by the laterally engaging recess 23 and the vertically approaching passage 21a, so that the front end portion of the closed front hood 10 moves in the horizontal direction and the vertical direction. Locked so that there is no. The bar-shaped engagement / disengagement part 16 is only restricted in movement in the diametrical direction by the latch 22, so that the front hood 10 can move in the longitudinal direction of the vehicle body.

  Further, as shown in FIG. 1, a hood flip-up device 25 that flips the rear portion of the front hood 10 upward is provided at the opening edge of the engine room 2. The hood flip-up device 25 moves upward while displacing the rear end portion of the front hood 10 as shown in FIGS. 2 to 5 to the rear of the vehicle body while the front end portion of the front hood 10 is locked by the hood lock mechanism 13. A first raising mechanism 24 that regulates the rear part of the front hood 10 that is also raised up at a predetermined position, and the front hood 10 that is raised up as shown in FIGS. A structure in which the second stopper mechanism 32 that restricts the movement of the rear part of the vehicle to the rear of the vehicle body is combined is used.

Further, the flip-up mechanism 24 includes, for example, a pair of left and right actuators 26 that instantaneously jumps the rear end of the front hood 10 and a pair of left and right hood guide mechanisms 28 that guide the rear end of the front hood 10 that is flipped up. A combined structure is used.
Of these, the pair of actuators 26 is provided near each hinge structure 11 as shown in FIG. For each of the pair of actuators 26, for example, a structure in which a rod-shaped piston 37 and an explosive inflator 38 are accommodated in an elongated cylinder 35 is used. The pair of actuators 26 are fixed to the vehicle body, and the piston ends are directed above the engine room 2. The pair of actuators 26 are connected to the ECU 7, and when the ECU 7 determines that a collision has occurred with the pedestrian from the detection signal of the impact sensor 6, the inflator 38 is activated and the piston 37 is instantaneously moved to the cylinder. It jumps out from 35 toward the upper front hood 10. That is, the piston 37 that has jumped out hits the rear lower surface of the front hood 10, so that the rear end of the front hood 10 jumps up.

Each of the pair of hood guide mechanisms 28 uses a link mechanism that also serves as the hinge structure 11 as shown in FIGS.
The hood guide mechanism 28 constituted by this link mechanism will be described. In the figure, reference numeral 40 denotes a base bracket installed at a position closest to the rear of the vehicle body among the vehicle body parts arranged on the left and right sides of the engine room 2; It is a hood bracket installed on the inner panel portion of the front hood 10 facing the base bracket 40. The base bracket 40 and the hood bracket 42 both extend in the longitudinal direction of the vehicle body and are fixed to the vehicle body with bolts.

  The end of the base bracket 40 on the rear side of the vehicle body and the end of the hood bracket 42 on the front side of the vehicle body are connected by an arm-shaped link 44. Specifically, each end portion of the link 44 is rotatably connected to the brackets 40 and 42 using a hinge receiving portion 45 and a hinge pin 46. Thereby, the link 44 is assembled between the brackets 40 and 42 so as to be foldable. That is, the brackets 40 and 42 are connected by a foldable link mechanism. The state in which the link 44 is folded at this time is a mode in which the front hood 10 is opened and closed in a normal state. From this folded state, as shown in FIG. 3, the front side hinge pin 46 is used as a fulcrum. When the hood 10 is opened and closed (opened forward), the engine room 2 can be opened and closed at normal times. When the standing of the link 44 is allowed, the front hood 10 is guided from both sides as shown in FIG. 5 so that it can be flipped up while maintaining a predetermined posture.

  The hood guide mechanism 28 is provided with a linkage mechanism 50 that switches the movement of the hood guide mechanism 28. For example, as shown in FIG. 2, the linkage mechanism 50 has a structure in which an engaging claw portion 51 protruding downward from an end portion of the hood bracket 42 and a linkage 52 provided at an intermediate portion of the link 44 are used. . Specifically, the linkage 52 uses an L-shaped member whose one end can be brought into and out of contact with the engaging claw 51 by rotatably supporting an intermediate portion on the link 44. The linkage 52 is urged by an urging member such as a torsion spring 53 in a direction in which one end approaches the engaging claw 51. One end of the link 44 is formed with an engagement recess 54 that can be engaged with and disengaged from the engagement claw 51. Normally, the engagement between the engagement claw 51 and the engagement recess 54 causes the base to be engaged. The bracket 40 and the folded link 44 are integrated to prevent the rear portion of the front hood 10 from being flipped up.

  Also, the other end of the linkage 52 extends to a point where the piston end of the actuator 26 passes as shown in FIG. 2, and when the end of the piston 37 abuts as shown in FIG. The engagement claw 51 and the engagement recess 54 are disengaged by rotating in a direction of escaping from the piston 37 (lock release direction). Thus, the movement of the actuator 26 is used to allow the rear end portion of the front hood 10 to jump up immediately before the front hood 10 is flipped up.

  By the operation of the linkage 52, the hood guide mechanism 28 normally establishes the hinge structure 11 that opens the front hood 10 as shown in FIG. 3 (opening and closing with the vehicle body rear hinge pin 46 as a fulcrum), When a collision with a pedestrian occurs, the mode is switched to the mode in which the rear end of the front hood 10 is flipped up by the movement of the actuator 26 as shown in FIG.

  Here, in the link 44 that connects the front hood 10 and the vehicle body 1, the position (fulcrum position) of the hinge pin 46 on the vehicle body side is arranged on the rear side of the vehicle body from the position (support position) of the hinge pin 46 on the front hood 10 side. Therefore, the movement (due to the movement of drawing the arc of the link 44) is added to the front hood 10 that has been flipped up. That is, while the front hood 10 is locked by the hood lock mechanism 13, the front hood 10 jumps upward while moving to the rear of the vehicle body. The movement of the front hood 10 is due to the fact that movement in the longitudinal direction of the vehicle body is allowed by the engagement of the latch 22 and the striker 14. By moving the front hood 10 to the rear of the vehicle body at this time, it is possible to minimize the burden on the pedestrian who falls on the engine hood 10.

  For example, as shown in FIGS. 2 to 5, the first stopper mechanism 30 has a structure in which a band plate-shaped stopper link 60 is assembled to the hood guide mechanism 28. Explaining this structure, a slide hole 61 extending along the full length direction is formed in a plate surface portion on one end side of the stopper link 60. The other end portion of the stopper link 60 is rotatably supported by a hinge pin 46 on the vehicle body 1 side arranged at the rear of the vehicle body. The remaining slide hole 61 on one end side is adjacent to the hood bracket 42 and slidably engaged with a slide pin 63 installed on the hood inner panel 10a. As shown in FIG. By sliding in 61, the front hood 10 is allowed to jump up. The tip position of the slide hole 61 is determined so that the front hood 10 abuts against the slide pin 63 when the front hood 10 leaves the engine room 2 until the front hood 10 receives the pedestrian safely. That is, the rear part of the front hood 10 that has been flipped up is regulated at an appropriate point so that a pedestrian who falls to the vehicle body 1 side can be received by the front hood 10 that has been flipped up.

  For the second stopper mechanism 32, a damper structure as shown in FIGS. 6 to 9, for example, a structure using a damper portion 70 formed of a damper rubber is used. In this structure, a body part disposed behind the striker 14, for example, a structure in which a damper portion 70 is provided in the radiator core support member 5 is used. In this structure, a recess 71 is formed on the side of the radiator core support member 5 facing the striker 14 to allow the striker 14 to move rearward of the front hood 10 when the front hood 10 is flipped up. A structure in which a damper portion 70 is provided on a wall surface 71a facing the striker 14 is used. Thereby, when the front hood 10 jumps up, the striker 14 that moves to the rear of the vehicle body together with the front hood 10 comes into contact with the damper portion 70, and the movement of the front part of the flon and the hood 10 that is flipped up to the rear of the vehicle body is restricted. It is like that. More specifically, for example, the damper portion 70 is assembled so that contact with the striker 14 starts immediately before the front hood 10 that has been flipped up stops. Thus, the front hood 10 that jumps up is restricted from moving at the rear by the stopper link 60 after the movement at the front at the damper 70 is restricted. Due to this restriction, the front hood 10 that has been raised especially generates a pulling force to the rear of the vehicle body immediately after the front part is restricted, and is made to be stretched to the rear of the vehicle body, making it difficult for overruns to occur when stopping. Yes.

Next, the flip-up of the hood flip-up device 25 configured as described above will be described with reference to FIGS.
Now, assume that the impact sensor 6 detects a collision with a pedestrian while the automobile is running. Then, a signal for operating the actuator 26 is output from the ECU 7. As a result, the inflator 38 is operated, and the piston 37 is instantaneously pushed out from the explosion of the explosive.

While the piston 37 is being pushed out, the other end of the linkage 52 is pushed up to the unlocking side as shown in FIG. Then, the engagement between the engagement claw portion 51 and the engagement recess 54 is released. Thereby, the hood guide mechanism 28 is switched from the mode (FIG. 3) of the hinge structure 11 with the front opening at the normal time to the mode in which the rear end portion of the front hood 10 can be flipped up.
Next, when the front end of the piston 37 reaches the lower surface of the front hood 10, the rear end of the front hood 10 is lifted as shown in FIG. Then, as shown in FIGS. 5 and 9, the link 44 connecting the rear end portion of the front hood 10 is rotationally displaced in the standing direction so that the front end portion of the vehicle body draws an arc. The stopper link 60 is also rotationally displaced in the standing direction while sliding with the slide pin 63.

  At this time, as shown in FIGS. 6 to 8, the front end portion of the front hood 10 is hood-locked by the striker 14 and the latch 22 so as to be movable in the longitudinal direction of the vehicle body. Therefore, the rear end portion of the front hood 10 is instantaneously jumped upward while moving rearward of the vehicle body as in the movement from the solid line to the two-dot chain line shown in FIG. At this time, the striker 14 at the front portion of the front hood 10 is tilted toward the rear of the vehicle body together with the front hood 10 that jumps up like the movement from the solid line to the two-dot chain line shown in FIG. Slide. Δ in FIG. 8 indicates the inclination at that time. As a result, the front hood 10 is separated from the equipment housed in the engine room 2.

Then, as shown in FIG. 9, the striker 14 abuts against the damper portion 70 before the rear portion of the front hood 10 that has been flipped up is controlled, and the front portion of the front and the hood 10 moves toward the rear of the vehicle body. regulate. Immediately after this regulation, the front hood 10 is pulled in the rear direction of the vehicle body, and the front hood 10 is stretched in the longitudinal direction of the vehicle body.
When the front hood 10 jumps up to a predetermined height, the slide pin 63 reaches the end of the slide hole 61 as shown in FIG.

Then, the movement of the stopper link 60 is restricted, the rear portion of the front hood 10 that has jumped up is restricted, and the front hood 10 is prevented from jumping up. A pedestrian who falls to the vehicle body side is received by the front hood 10 that has jumped up.
From this, due to the restriction of the front and rear portions of the front hood 10 performed by the first and second stopper mechanisms 30 and 32, the deformation of the center portion of the front hood 10 that occurs when the hood is flipped up can be reduced.

  Therefore, when the rear part of the front hood 10 suddenly stops, overrun (a phenomenon in which the front side of the hood advances toward the rear of the vehicle body due to inertial force) generated in each part of the front hood 10 can be reduced. In particular, the front hood 10 is deformed into a mountain shape when the flip-up is stopped, or the entire hood tends to vibrate in the vertical direction for a long period of time. Generation | occurrence | production can be suppressed and the safety | security of the pedestrian who fell into the front hood 10 can be improved.

  Moreover, even when the hood flip-up device 25 is operated by mistake due to the restriction of the front and rear portions of the front hood 10, the occurrence of permanent deformation of the front hood 10 due to overrun is suppressed. It is possible to return to the original state as it is, and it is easy to return to the original state. For this reason, there is also an advantage that it is not necessary to replace with a new front hood every time the erroneous hood flip-up device 25 is operated. In particular, the front hood 10 in which the rearward amount of the rear portion of the hood is reduced, that is, the front hood 10 that is easily deformed by forming the folding assisting portion 10c can effectively suppress the occurrence of permanent deformation.

  In addition, since the second stopper mechanism 32 employs a structure in which the damper portion 70 is installed behind the striker 14 of the hood lock mechanism 13, normally, the striker 14 used in the hood lock mechanism 13 is effectively utilized. The movement of the front portion of the front hood 10 to the rear of the vehicle body can be restricted. In particular, since the striker 14 exists in the center of the front hood 10 in the vehicle width direction, the front portion of the front hood 10 can be stably regulated even though the striker 14 is at one location.

  In addition, after the movement of the front portion of the front hood 10 is restricted by the second stopper mechanism 32, the movement of the rear portion of the front hood 10 is restricted by the first stopper mechanism 30, so that the front that is flipped up The hood 10 generates a pulling force toward the rear of the vehicle body immediately after the front portion is regulated, and is stretched in the longitudinal direction of the vehicle body, so that the overrun occurring in the front hood 10 can be most effectively suppressed. The occurrence of permanent deformation of the front hood 10 can be effectively suppressed.

10 and 11 show a second embodiment of the present invention.
In the present embodiment, just before the front hood 10 jumps up as in the first embodiment, the striker 14 does not come into contact with the damper portion 70, but immediately after the front hood 10 jumps up. The striker 14 hits the damper portion 80.

  Specifically, in the present embodiment, as shown in FIG. 10, the shape of the recess 71 formed in the radiator core support member 5 is changed, or a damper portion 80 formed of a damper rubber having a large outer shape is adopted. Then, the arrangement of the damper portion 80 was changed so that the damper portion 80 abuts on the striker 14 immediately after the front hood 10 starts to be flipped up as shown in FIG.

When the striker 14 comes into contact with the damper portion 80 at such timing, the front hood 10 is stretched in the longitudinal direction of the vehicle body immediately after the front hood 10 is flipped up as shown in FIG. The overrun of the front hood 10 is effectively suppressed. Even if it does in this way, there exists an effect similar to 1st Embodiment.
FIG. 12 shows a third embodiment of the present invention.

  In the present embodiment, the second stopper mechanism 32 is not a structure in which a damper portion is provided behind the striker 14 as in the first embodiment, but an engine room corresponding to the front portion and the front portion of the front hood 10. 2, for example, a structure in which a damper portion 90 is provided in one of the radiator core support members 5 and a contact portion 95 that can contact the damper portion 90 is formed in the other. is there.

For this purpose, damper portions 90 are respectively provided at points α on the lower surfaces on both sides of the front hood 10 in FIG. 1 on both sides of the striker 15 of the front hood 10 indicated by a two-dot chain line. The structure which formed the contact part 95 in each point (beta) of the upper part of the radiator core support member 5 shown with the dashed-two dotted line corresponding to these is used.
Specifically, as shown in FIG. 12, step portions 91 facing each other in the longitudinal direction of the vehicle body are formed on the lower surface of the front portion of the front hood 10 and the upper portion of the radiator core support member 5, respectively. When attaching the damper portion 90 to the step portion 91 of the front hood 10 and using the vertical wall surface of the step portion 91 of the radiator core support member 5 facing the damper portion 90 as a contact portion 95, the front hood 10 jumps up, The damper portion 90 is in contact with the contact portion 95.

FIG. 12 shows when the damper portion 95 provided on the front hood 10 comes into contact with the contact portion 95 of the vehicle body 1. Note that the number of the damper members 90 and the contact portions 95 is not limited to two and may be more than that.
Even if it does in this way, there exists an effect similar to 1st Embodiment. In particular, this structure has an advantage that the rear movement of the front portion of the hood can be suppressed while the posture of the front hood 10 is kept stable by having a plurality of damper members 90.

However, in FIGS. 10-12, the same code | symbol is attached | subjected to the same part as 1st Embodiment, and the description was abbreviate | omitted.
FIG. 13 shows a fourth embodiment of the present invention.
In the present embodiment, contrary to the third embodiment, a damper portion 90 is provided on the step portion 91 of the radiator core support member 5, and the vertical wall surface facing the damper portion 90 of the step portion 91 of the front hood 10 is abutting portion. 95. However, in FIG. 13, the same parts as those of the third embodiment are denoted by the same reference numerals, and the description thereof is omitted.

In addition, when the damper part 90 shown in the third and fourth embodiments described above further includes a vertical absorption part 99 that absorbs an impact in the vertical direction when the front hood 10 is normally opened and closed, it can be normally opened and closed with one component. It is possible to provide the second stopper function together with the vertical impact absorbing function.
Of course, in the third and fourth embodiments described above, a technique in which the damper portion 90 and the contact portion 95 abut immediately after the front hood 10 is flipped up may be applied, as in the second embodiment. .

  The present invention is not limited to the first to fourth embodiments described above, and various modifications may be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the example in which the damper portion formed of the damper rubber is used as the second stopper mechanism is not limited to this, but as in the fifth embodiment shown in FIG. When the stopper member 100 having a structure in which both ends of the member are fixed to the vehicle body and the center of the member is in contact with the striker 14 is brought into contact with the striker 14, the plate-like member serving as a damper extends like a two-dot chain line. The structure of the second stopper mechanism as described above may be used, or another damper part or another structure may be used. In short, any structure that restricts the movement of the front part of the hood toward the rear of the vehicle body may be used.

  In the above-described embodiment, a structure using a link is employed as the first stopper mechanism. However, the first stopper mechanism is not limited to this, and may be formed by another structure (for example, a structure using a wire or a claw structure). The actuator itself may be a stopper mechanism. In the above-described embodiment, an example in which a link mechanism is used as the flip-up mechanism is described. However, the present invention is not limited to this, and the slide mechanism 110 according to the sixth embodiment shown in FIG. 15 and the seventh mechanism shown in FIG. A flip-up mechanism constituted by other mechanisms such as the lever mechanism 120 as in the embodiment may be used.

  In the above-described embodiments, the present invention is applied to the front hood that opens and closes the engine room formed in the front part of the vehicle body. However, the present invention is not limited to this, and a power unit other than the engine formed in the front part of the vehicle body is used. You may apply this invention to the food | hood which opens and closes the accommodation room to accommodate, the other equipment, the luggage compartment which accommodates a luggage, etc.

The perspective view which shows the hood flip-up apparatus of the vehicle which concerns on the 1st Embodiment of this invention with the vehicle carrying the apparatus. The side view which shows the flip-up mechanism of the hood flip-up apparatus. The side view which shows when the same raising mechanism has comprised the hinge of normal time. The side view which shows when the same raising mechanism switches to the mode which raises a hood. The side view which shows a time when the rear-end part of the food | hood was flipped up with the same flip-up mechanism. The perspective view which shows a 2nd stopper mechanism with the hood lock mechanism which assembled | attached the mechanism. FIG. Similarly side sectional drawing. The side view explaining when the hood jumps up while being stretched in the longitudinal direction of the vehicle body. The top view which carried out the partial cross section which shows the attachment structure of the damper part used as the principal part of the 2nd Embodiment of this invention. The side view explaining when the hood is in a state stretched in the longitudinal direction of the vehicle body immediately after the hood jumps up by the damper portion. The sectional side view which shows the attachment structure of the damper part used as the principal part of the 3rd Embodiment of this invention. The sectional side view which shows the attachment structure of the damper part used as the principal part of the 4th Embodiment of this invention. The perspective view which made the plate-shaped member used as the principal part of the 5th Embodiment of this invention the 2nd stopper mechanism. The side view of the flip-up mechanism by the slide structure used as the principal part of the 6th Embodiment of this invention. The side view of the raising mechanism by the lever structure used as the principal part of the 7th Embodiment of this invention.

Explanation of symbols

1 Car body 2 Engine room (opening on the front upper surface of the car body)
DESCRIPTION OF SYMBOLS 10 Front hood 10c Folding promotion part 13 Hood lock mechanism 14 Striker 22 Latch 24 Jumping mechanism 25 Hood raising apparatus 26 Actuator 28 Hood guide mechanism 30 First stopper mechanism 32 Second stopper mechanism 70, 80, 90 Damper part

Claims (5)

A front-opening hood that closes the opening formed on the upper surface of the front part of the vehicle body, and when the vehicle body is closed, the end on the vehicle body front side is locked by a hood lock mechanism;
At the time of the collision of the front part of the vehicle body, a flip-up mechanism that raises the end part of the rear side of the vehicle body of the hood blocking the opening, while the end part of the front side of the vehicle body of the hood is locked,
A first stopper mechanism for restricting the rear portion of the hood that is flipped up at a predetermined position;
And a second stopper mechanism for restricting the rearward movement of the front portion of the hood to the rear of the vehicle body. The hood lock mechanism includes a striker provided in the hood, and a latch provided in the vehicle body and detachably engaged with the striker.
The second stopper mechanism has a damper portion in a rear vehicle body portion from the striker, and the striker that is displaced rearward of the vehicle body together with the raised hood is configured to abut against the damper portion. The vehicle hood flip-up device according to claim 1.   The second stopper mechanism is provided with a damper portion on one of the front portion of the hood and the opening edge portion of the opening corresponding to the front portion so as to face each other in the front-rear direction of the vehicle body, and the damper on the other side. The hood flip-up device for a vehicle according to claim 1, wherein the hood flip-up device for a vehicle according to claim 1 is configured by forming a contact portion that can contact the portion.   The first stopper mechanism restricts the movement of the rear portion of the hood after the second stopper mechanism restricts the movement of the front portion of the hood. The hood flip-up device for a vehicle according to any one of the above.   The hood flip-up device for a vehicle according to any one of claims 1 to 4, wherein the hood includes a folding assisting portion.

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