JPH1149036A - Trap hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trap hood wherein in case of a vehicle colliding with a wall or the like from the front surface in a condition that a rear end of the hood is sprung up, possibility of a rear end of the hood moving to a front glass side can be eliminated. SOLUTION: In a trap hood detecting collision of a front end of a vehicle against an obstacle to spring up a rear end of the hood 2 from a car body 3, a connection member 60 is provided, which is connected to a hood side and a car body side to be associated with movement to a springing up position of the rear end of the hood 2. In the car body side, a hold part 57 holding the connection momber 60 in the springing up position of the hood 2 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting the impact of an obstacle when a running vehicle collides with an obstacle (for example, a pedestrian) and the obstacle falls down on a hood and makes a secondary collision with the vehicle. The present invention relates to a flip-up hood that absorbs and absorbs and protects an obstacle.

[0002]

2. Description of the Related Art FIG. 16 shows an example of the prior art described in Japanese Utility Model Laid-Open No. 49-110432. In the flip-up hood A, a push-up rod D urged upward by a spring C and normally held at a lower position by a lock member E is disposed below the rear end of the hood B. At the time of collision between the front end and the obstacle, the lock of the lock member E is mechanically released by the impact force, the push-up rod D rises, and the rear end of the hood B jumps up.

[0003] For this reason, when the vehicle collides with a pedestrian or the like, the flip-up hood A jumps up the rear end of the hood B to expand the space between the hood B and the structure in the engine room. The impact of a pedestrian or the like when a pedestrian or the like falls on the hood and makes a secondary collision with the vehicle can be absorbed and reduced.

[0004]

However, when the rear end of the hood B jumps up and the vehicle collides with a wall or an oncoming vehicle from the front, the flip-up hood A has a problem.
A pressing force for pushing the hood B rearward in the vehicle front-rear direction X acts on the hood B, and the rear end of the hood B may move toward the rear windshield F.

Therefore, according to the present invention, when the vehicle collides from the front with a wall or the like with the rear end of the hood jumped up,
An object of the present invention is to provide a flip-up hood that can eliminate the possibility that the rear end of the hood moves toward the windshield.

[0006]

According to a first aspect of the present invention, there is provided a flip-up system in which a collision between a front end of a vehicle and an obstacle is detected and a rear end of a hood jumps up from a vehicle body. In the hood, a coupling member coupled to the hood side and the vehicle body side and interlocking with the movement of the rear end of the hood to the flip-up position is provided, and holding the coupling member on the vehicle body side at the flip-up position of the hood The configuration is adopted in which a unit is provided.

Therefore, according to the first aspect of the present invention, when a collision between the front end of the vehicle and an obstacle is detected and the rear end of the hood jumps up from the vehicle body, the connecting members connected to the hood side and the vehicle body side include the hood. In conjunction with the movement of the rear end to the flip-up position,
It is held by the holding member at the flip-up position after the interlocking.

Therefore, when the vehicle collides against a wall or the like from the front with the rear end of the hood jumped up, the connecting member held by the holding member prevents the rear end of the hood from moving toward the windshield. I do.

According to a second aspect of the present invention, there is provided the flip-up hood according to the first aspect, wherein the coupling member is a straight intermediate link, and one end of the intermediate link is provided on the hood side in the vehicle front-rear direction. The other end is rotatably connected to the vehicle body and is rotatably connected to the vehicle body in the front-rear direction. It is a stopper supported from the side.

Therefore, according to the second aspect of the present invention, when the rear end of the hood jumps up from the vehicle body, the coupling member serving as the intermediate link has the other end linked to the movement of the rear end of the hood to the flip-up position. It moves in the front-rear direction, rises by the movement of the other end, and the standing state is supported from the rear side in the vehicle front-rear direction by a holding portion serving as a stopper.

According to the second aspect of the invention, when the vehicle collides with a wall or the like from the front with the rear end of the hood jumped up, the hood attempts to move rearward in the vehicle front-rear direction,
Since the both ends of the intermediate link in the upright state are rotatably connected in the vehicle front-rear direction, the intermediate link attempts to fall backward with the hood in the vehicle front-rear direction.

However, according to the second aspect of the present invention, since the stopper supports the intermediate link that is about to fall backward in the vehicle longitudinal direction together with the hood from the rear side in the vehicle longitudinal direction, the rear end of the hood is raised and the wall is raised. For example, when the vehicle collides from the front, the hood can be prevented from moving rearward in the vehicle front-rear direction.

According to a third aspect of the present invention, there is provided the flip-up hood according to the second aspect, wherein the stopper opposes the intermediate link after being linked to the flip-up position on the side in the vehicle width direction. It is characterized by having a part.

Therefore, according to the third aspect of the invention, when the vehicle collides with a wall or the like from the front with the rear end of the hood jumped up, the standing intermediate link together with the hood turns around in the vehicle width direction. Even if the vehicle tries to fall rearward in the vehicle front-rear direction, it can be prevented from wrapping around in the vehicle width direction by the side wall portion of the stopper.

According to a fourth aspect of the present invention, there is provided the flip-up hood according to the second or third aspect, wherein an actuator for flipping the rear end of the hood from the vehicle body and detecting that the front end of the vehicle collides with an obstacle. Collision detection means, control means for operating the actuator according to a detection signal from the collision detection means, a hood lock mechanism for locking the front end of the hood to the vehicle body with the hood closed, and the rear end of the hood in a fixed position A hinge mechanism for restraining the hood so that the hood can be opened and closed and releasing the restraint in accordance with the operation of the actuator.

Therefore, according to the present invention, when the collision detecting means detects that the front end of the vehicle has collided with an obstacle, the control means activates the actuator, and in accordance with the operation, the control means activates the rear of the hood in the hinge mechanism. The restraint of the end in the fixed position is released, and the rear end of the hood jumps up from the vehicle body by the operation of the actuator.

In addition, in the invention according to claim 4, since the hinge mechanism normally restrains the rear end of the hood at a fixed position and supports the hood so that it can be opened and closed, the hood locks the front end of the hood to the vehicle body. By releasing the lock of the lock mechanism, the front end of the hood can be freely opened and closed in the vertical direction.

According to a fifth aspect of the present invention, there is provided the flip-up hood according to the fourth aspect, wherein the hinge mechanism includes a hood-side link provided at a rear end of the hood and a vehicle-body-side link provided at the vehicle body. And an intermediate link having one end coupled to the hood-side link via a fulcrum pin and the other end coupled to the vehicle-body-side link; and a rear end of the hood provided on the vehicle-body-side link to rotatably lock the fulcrum pin. And a fulcrum pin lock mechanism that supports the hood so as to be openable and closable and releases the lock with the operation of the actuator, and the stopper provided on the vehicle body side link. It is a feature.

According to the fifth aspect of the present invention, when the front end of the vehicle collides with an obstacle and the actuator is actuated, the lock of the fulcrum pin in the fulcrum pin lock mechanism of the hinge mechanism is released, and the rear end of the hood is moved to the vehicle body. The intermediate link stands up from the vehicle, and the standing state of the intermediate link is supported by the stopper from the rear side in the vehicle longitudinal direction.

In addition, according to the invention of claim 5, the fulcrum pin locking mechanism provided on the vehicle body side link normally locks the fulcrum pin rotatably to restrain the rear end of the hood in a fixed position and to lock the hood at a fixed position. Is supported so that it can be opened and closed, so that the front end of the hood can be opened and closed in the vertical direction with the fulcrum pin as the center of rotation.

According to a sixth aspect of the present invention, there is provided the flip-up hood according to any one of the first to fifth aspects, wherein the hood is provided on one of the hood side and the vehicle body side with respect to the other engaged portion. It is characterized in that an engaging portion capable of engaging in the vehicle front-rear direction is provided irrespective of the presence or absence of flip-up.

According to the sixth aspect of the present invention, the engaging portion provided on one of the hood side and the vehicle body side is engaged with the other engaged portion in the vehicle front-rear direction regardless of whether the hood is flipped up or not. The engagement can prevent the hood from moving rearward in the vehicle front-rear direction.

According to a seventh aspect of the present invention, in the flip-up hood according to the sixth aspect, the engaging portion is a hook portion provided on the hood side, and the engaged portion is provided on the vehicle body side. The hook portion is an engagement hole into which the hook portion is inserted.

For this reason, according to the invention of claim 7, regardless of the presence or absence of the hood jumping up, the engagement hole provided in the vehicle body side is
The hook portion provided on the hood side can be engaged in the vehicle longitudinal direction, and the engagement can prevent the hood from moving backward in the vehicle longitudinal direction.

According to an eighth aspect of the present invention, there is provided the flip-up hood according to the sixth aspect, wherein the engaging portion and the engaged portion are hook portions facing each other in the vehicle longitudinal direction. It is.

Therefore, according to the present invention, the hook provided on one of the hood and the vehicle body is engaged with the other hook in the vehicle front-rear direction regardless of whether the hood is flipped up or not. The engagement prevents the hood from moving backward in the vehicle front-rear direction.

[0027]

According to the first aspect of the present invention, when the vehicle collides with a wall or the like from the front in a state where the rear end of the hood is jumped up, the connecting member held by the holding member replaces the windshield at the rear end of the hood. Since the movement to the side is prevented, the possibility that the rear end of the hood moves to the windshield side can be eliminated.

According to the second aspect of the present invention, when the vehicle collides against a wall or the like from the front with the rear end of the hood jumped up,
Since the stopper supports the intermediate link which is about to fall backward in the vehicle longitudinal direction together with the hood from the rear side in the vehicle longitudinal direction, the hood can be prevented from moving rearward in the vehicle longitudinal direction. Can move to the windshield side.

According to the third aspect of the present invention, when the vehicle collides with a wall, an oncoming vehicle, or the like from the front with the rear end of the hood jumped up, the intermediate link in the upright state wraps around the vehicle in the vehicle width direction together with the hood. The rear end of the hood is closer to the windshield than the invention according to claim 2, because even if it is attempted to fall rearward in the vehicle front-rear direction, it can be prevented from turning around in the vehicle width direction by the side wall portion of the stopper. It is possible to more reliably eliminate the possibility of moving to.

According to the fourth aspect of the invention, normally, the front end of the hood can be freely opened and closed in the vertical direction, so that the engine room can be inspected by opening the front end of the hood.

According to the fourth aspect of the present invention, when the front end of the vehicle collides with an obstacle, the actuator operates and the rear end of the hood jumps from the vehicle, so that an obstacle such as a pedestrian is placed on the hood. It is possible to protect the obstacle by absorbing and relaxing the impact of the obstacle when the vehicle falls down and makes a secondary collision with the vehicle.

According to the fifth aspect of the invention, normally, the front end of the hood can be opened and closed with the fulcrum pin of the hinge mechanism as the center of rotation, so that the front end of the hood can be opened to inspect the engine room.

According to the fifth aspect of the present invention, when the front end of the vehicle collides with an obstacle and the actuator is actuated, the rear end of the hood jumps up from the vehicle body, and the intermediate link stands up. Because it is supported by the stopper from the back in the front and rear direction, if the vehicle hits a wall or oncoming vehicle from the front with the rear end of the hood jumped up, the rear end of the hood may move to the windshield side Can be eliminated.

According to the sixth aspect of the present invention, regardless of whether the hood is flipped up or not, the engaging portion is engaged with the engaged portion to prevent the hood from moving backward in the vehicle longitudinal direction. The rear end of the hood is on the windshield side, not only when the vehicle collides from the front with a wall or the like with the rear end of the hood jumped up, but also when the vehicle collides with the wall or the like with the hood closed. It is possible to eliminate the possibility of moving to.

According to the seventh aspect of the present invention, the hook provided on the hood is engaged with the engaging hole provided on the vehicle body regardless of whether the hood is flipped up, and the hood is moved rearward in the vehicle longitudinal direction. In the same manner as in the sixth aspect of the invention, not only when the vehicle collides with a wall or the like from the front with the rear end of the hood jumped up, but also when the vehicle is closed with the hood closed. Even in the event of a collision with a wall or the like from the front, it is possible to eliminate the possibility that the rear end of the hood moves toward the windshield.

In addition, according to the present invention, the hook on the hood side is engaged with the engaging hole on the vehicle body side to prevent the hood from moving rearward in the vehicle front-rear direction. In addition, the balance of the stress generated in the engaged portion, which is the engagement hole, is good, and therefore, even if the vehicle collides violently with a wall or the like from the front, the possibility that the rear end of the hood moves toward the windshield is reduced. Can be eliminated.

According to the eighth aspect of the present invention, the hook provided on one of the hood and the vehicle body is engaged with the other hook regardless of whether or not the hood is flipped up, so that the hood can be moved rearward in the vehicle longitudinal direction. In the same manner as the invention described in claim 6, not only when the vehicle collides with a wall or the like from the front with the rear end of the hood jumped up, but also
Even when the vehicle collides with a wall or the like from the front with the hood closed, the possibility that the rear end of the hood moves toward the windshield can be eliminated.

Further, in the invention of claim 8, since the engaged portion is a hook portion, the engaged portion is an engaging hole.
The size of the engaged portion can be reduced as compared with the invention of the first aspect.

[0039]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIGS.
FIG. 1 shows a first embodiment which is an example of an embodiment in which the inventions described in 7 are combined, FIG. 1 is an explanatory diagram showing a front side of an automobile according to the first embodiment, and FIG. , First
FIG. 3 is a block diagram according to the embodiment, and FIG. 3 is an explanatory diagram illustrating a state when the hood is flipped up as illustrated in FIG. 1.

As shown in FIG. 1, an automobile 1 includes a hood 2
Hood 2 on each side of the rear end of the vehicle in the vehicle width direction.
Hinge mechanism 11 which is constrained at a fixed position and is openably and closably supported, and is released when the front end of the vehicle collides with an obstacle.
A hood lock mechanism 12 is provided at the center of the front end of the hood 2 in the vehicle width direction to lock the front end of the hood 2 to the vehicle body 3 with the hood 2 closed.

Further, the automobile 1 includes a bumper sensor 13 for detecting a collision between the front end of the vehicle and an obstacle.
In addition, a speed sensor 14 for detecting a vehicle speed, and a controller 16 as a control means for inputting both detection signals from the bumper sensor 13 and the speed sensor 14 and outputting a signal to the actuator 15 are also provided (see FIG. 2).

The actuator 15 is provided on the vehicle body 3 and, as shown in FIG. 3, receives a signal from the controller 16 and inflates the airbag 17 using energy of explosive or the like, and inflates the airbag 17. The rear end of the hood 2 is raised by force. However, the actuator 15 is not limited to the airbag type, and may be, for example, a pretensioner using a spring as in the conventional product shown in FIG. 16, or may use energy such as air pressure, hydraulic pressure, or explosive powder. The cylinder or the like used may be used.

1 and 3, reference numeral 5 denotes a windshield, and in FIG. 3, reference numeral 60 denotes an intermediate link of a hinge mechanism described later.

Here, the operation of the controller 16 will be further described. FIG. 4 is a flowchart showing the operation of the controller 16. The controller 16 determines whether or not the vehicle speed V is higher than the set vehicle speed in step S1, determines whether or not the bumper sensor 13 is ON in step S2, and if both are YES, activates the actuator 15 in step S3. Let it.

The reason for setting the vehicle speed condition in step S1 is to prevent the actuator 15 from being operated unnecessarily when an impact is applied to a stopped vehicle by mischief or the like. Therefore, the bumper sensor 13 and the speed sensor 14 constitute a collision detecting means for detecting that the leading end of the vehicle has collided with an obstacle.

Next, the hinge mechanism 11 will be described.
FIG. 5 is a front view showing the periphery of the hinge mechanism, and FIG.
FIG. 7 is a plan view showing only the hinge mechanism in FIG.
6 is a right side view of the device shown in FIG. 6 as viewed obliquely from the lower right, and FIG. 8 is an end view of a section taken along line LL of FIG.

As shown in FIGS. 5 to 7, the hinge mechanism 11
A hood side link 40 bolted to the lower surface of the hood 2 and a body side link 50 bolted to the vehicle body 3
And a straight intermediate link 60 that is connected to the hood-side link 40 and the vehicle-body-side link 50 and that is connected to the rear end of the hood 2 to move up to the flip-up position.

A fulcrum pin 41 is attached to the rear end of the hood-side link 40 in parallel with the vehicle width direction Y. From the lower surface of the hood-side link 40, a hook portion 4 as an engaging portion is formed.
2 extends downward.

The vehicle body side link 50 has a wall portion 51 extending in the vehicle front and rear direction X on the surface thereof, and an extending portion 52 located below the hood side link 40 has a vehicle front and rear direction X.
To the hook portion 42 of the hood-side link 40 and an engaging portion that can be engaged in the vehicle front-rear direction X, and formed behind the engagement hole 53 in the vehicle front-rear direction X.
The hook portion 42 of the hood side link 40 is inserted and disposed.

The hook portion 42 of the hood side link 40
Is selected so that the vertical length thereof can be engaged with the engagement hole 53 of the vehicle body side link 50 regardless of whether the hood 2 is flipped up. The length in the vehicle front-rear direction X is selected so that the hook portion 42 of the hood-side link 40 does not abut when the hood 2 is opened and closed, which will be described later.

A locking portion 54 for locking the fulcrum pin 41 of the hood-side link 40 is formed at the rear upper end of the wall 51 of the vehicle-body-side link 50 in the vehicle front-rear direction X, and extends from the front end to the central portion. A sliding hole 55 extending in the vehicle front-rear direction X is provided therethrough, and a key portion 56 that is recessed downward is formed at the rear end of the sliding hole 55.

The intermediate link 60 is disposed between the wall portion 51 of the vehicle body side link 50 and the hood side link 40, and has one end connected to the fulcrum pin 41 of the hood side link 40 in the vehicle longitudinal direction X.
The sliding pin 61 implanted at the other end is attached to the sliding hole 55 of the vehicle body side link 50, and the other end slides on the vehicle body side link 50 in the vehicle front-rear direction X. It is freely and rotatably mounted.

Therefore, when the hood 2 is flipped up, the slide pin 61 slides along the slide hole 55 rearward in the vehicle front-rear direction X and is held by the key portion 56 of the slide hole 55. Then, the intermediate link 60 itself stands up and holds the rear end of the hood 2 at the flip-up position.

On the wall surface of the wall portion 51 of the vehicle body side link 50 on the side of the intermediate link 60, the rear side of the intermediate link 60 in the upright state is in contact with the rear end face of the intermediate link 60 in the upright state. A stopper 57 is formed as a holding portion for holding the standing state, and a support pin 58 is attached below the locking portion 53 on the wall portion 51 of the vehicle body side link 50 in parallel with the vehicle width direction Y. 58
, The intermediate portion of the lock piece 70 is rotatably attached.

The lock piece 70 has a lock portion 71 formed at an upper portion thereof to rotatably lock the fulcrum pin 41 in cooperation with the locking portion 54 of the vehicle body side link 50, and a lock portion 71 at a lower portion. One end of an elastic body 72, which is a spring for pressing against the fulcrum pin 41, is attached. The other end of the elastic body 72 is attached to the front end of the wall portion 51 of the vehicle body side link 50, and The lower part is pulled forward in the vehicle front-rear direction X.

For this reason, the fulcrum pin 41 of the hood side link 40 is moved by the elasticity of the elastic body 72 so that the vehicle body side link 5
The lock portion 54 of the lock member 70 and the lock portion 71 of the lock piece 70 are rotatably locked.

FIGS. 9 and 10 are explanatory views of the operation of the first embodiment, and FIG. 11 is an end view of a section taken along line MM of FIG.

In the first embodiment of the present invention described above,
The hood 2 is provided at a fulcrum pin 41 of a hood-side link 40 of the hinge mechanism 11 disposed on both sides of the rear end in the vehicle width direction Y.
Is locked rotatably by the cooperation of the locking portion 54 of the vehicle body side link 50 and the locking portion 71 of the locking piece 70 due to the elasticity of the elastic body 72. Therefore, when the lock of the hood lock mechanism 12 is manually released and the tip of the hood 2 is lifted, as shown in FIG. 9, the hood 2 rotates around the fulcrum pin 41 of the hood side link 40 of the hinge mechanism 11 as a rotation center. It turns around W and the tip lifts.

On the contrary, when the hood 2 is closed,
By lowering the tip of the hood 2, the hood 2
The hood lock mechanism 12 rotates the fulcrum pin 41 counterclockwise about the fulcrum pin 41 as a rotation center and is locked to the vehicle body 3 by the hood lock mechanism 12.

The engaging hole 53 of the vehicle body side link 50 is
Since the length in the vehicle front-rear direction X is selected so that the hook portion 42 of the hood-side link 40 does not abut when the hood 2 is opened and closed, the opening and closing of the hood 2 does not hinder the opening and closing of the hood 2. Absent.

In the hood 2, the fulcrum pin 41 of the hood side link 40 of the hinge mechanism 11 is configured such that the locking portion 54 of the vehicle body side link 50 and the lock piece 7
0 is securely locked in cooperation with the lock portion 71 of the hinge mechanism 11 during normal running of the vehicle 1.
No rattling occurs.

When the automobile 1 is traveling normally, both sides of the rear end of the hood 2 in the vehicle width direction Y are locked to the vehicle body 3 via the hinge mechanism 11, and the front end of the hood 2 is locked to the vehicle body 3 by the hood lock mechanism 12. Since the hood 2 is locked, the hood 2 itself does not rattle.

When the front end of the vehicle 1 collides with an obstacle during traveling, the actuator 15 operates to inflate the airbag 17, and the inflation force of the airbag 17 reduces the elastic body 7.
2, the locking portion 5 of the vehicle body side link 50
The lock of the fulcrum pin 41 is released by the cooperation of the lock member 71 and the lock portion 71 of the lock piece 70, and the rear end of the hood 2 is flipped up as shown in FIG.

At this time, the intermediate link 60 is
1 along the sliding hole 55 of the vehicle body side link 50
, The sliding pin 61 is held by the key portion 56, and stands up to hold the rear end of the hood 2 at the flip-up position.

For this reason, the intermediate link 60 ensures the space between the hood 2 and the structure in the engine room when the hood 2 is flipped up, so that obstacles such as pedestrians can be removed from the hood 2.
The impact of the obstacle at the time of a secondary collision with the vehicle after falling up is absorbed together with the hood 2 to be reduced.

The locking portion 54, the support pin 58, the lock piece 70, and the elastic member 72 of the vehicle body side link 50 lock the fulcrum pin 41 provided on the vehicle body side link 50 so as to be rotatable, and the rear end of the hood 2 is provided. And a fulcrum pin lock mechanism 80 that supports the hood 2 so that it can be opened and closed, and releases the lock with the operation of the actuator 15.

When the vehicle 1 collides with a wall, an oncoming vehicle, or the like from the front after the hood 2 is flipped up, a pressing force for pushing the hood 2 rearward in the vehicle longitudinal direction X acts on the hood 2. The pressing force is distributed to the hood lock mechanism 12 at the front end of the hood 2 and the hinge mechanisms 11 located at both ends in the vehicle width direction Y at the rear end of the hood 2.

For this reason, in the hinge mechanism 11, the pressing force acts on the intermediate link 60 in the upright state via the fulcrum pin 41 of the hood-side link 40, and the intermediate link 60 uses the sliding pin 61 as the rotation center. And the hood 2 try to fall backward in the vehicle front-rear direction X.

However, a stopper 57 is formed on the wall portion 51 of the vehicle body side link 50 so as to abut on the rear end face of the intermediate link 60 in the upright state to maintain the upright state of the intermediate link 60 (see FIG. 11). Therefore, the intermediate link 60 is prevented from falling backward in the vehicle front-rear direction X, and the rear end of the hood 2 is prevented from moving toward the windshield 5.

When the automobile 1 violently collides with a wall, an oncoming vehicle, or the like after the hood 2 jumps up, and the pressing force acting on the hood 2 increases, the stopper 57 of the wall portion 51 of the vehicle body side link 50 becomes large. Prevents the intermediate link 60 from falling backward in the vehicle front-rear direction X, and the hook portion 42 of the hood-side link 40
To prevent the rear end of the hood 2 from moving toward the windshield 5.

At this time, since the movement of the hood 2 toward the windshield 5 is prevented, the hood 2 is bent inward in the vehicle width direction Y at the central portion in the vehicle front-rear direction X. Accordingly, the center of the hood 2 in the vehicle longitudinal direction X is provided in the vehicle width direction Y.
If the vehicle 1 collides with a wall or an oncoming vehicle, etc., from the front, the impact force generated between the intermediate link 60 and the stopper 57 of the vehicle body side link 50 can be provided by providing a bead which is an easily bent weak portion along the line. And the hook portion 42 of the hood side link 40
The maximum value of the impact force generated between the hinge mechanism 11 and the engaging hole 53 of the vehicle body side link 50 can be reduced, and the size and weight of the hinge mechanism 11 can be reduced.

When the vehicle 1 collides with a wall, an oncoming vehicle, or the like from the front during normal running, that is, with the hood 2 closed, the hood 2 is pushed backward in the vehicle longitudinal direction X. The pressing force acts on the hood 2, and this pressing force
The hood 2 is distributed to the hood lock mechanism 12 at the front end of the hood 2 and the hinge mechanisms 11 at the rear end of the hood 2 at both ends in the vehicle width direction Y and transmitted to the fulcrum pins 41 of the hood side link 40 of the hinge mechanism 11. You.

However, as shown in FIG. 5, when the hood 2 is closed, the fulcrum pin 41 of the hood side link 40
The locking portion 71 of the locking piece 70 utilizing the elasticity of the elastic body 72 is pressed against the locking portion 54 of the vehicle body side link 50, and is pushed rearward in the vehicle front-rear direction X by the locking portion 54 of the vehicle body side link 50. As a result, the rear end of the hood 2 is prevented from moving toward the windshield 5.

If the automobile 1 violently collides with a wall, an oncoming vehicle, or the like with the hood 2 closed, and the pressing force acting on the hood 2 increases, the locking portion 54 of the vehicle body side link 50 Prevents the fulcrum pin 41 of the hood side link 40 from moving rearward in the vehicle front-rear direction X, and the hook portion 42 of the hood side link 40
To prevent the rear end of the hood 2 from moving toward the windshield 5. At this time, the movement of the hood 2 toward the windshield 5 is prevented, so that the central portion in the vehicle front-rear direction X is lifted up, and the central portion is bent along the vehicle width direction Y.

As described above, according to the first embodiment of the present invention, when the vehicle collides against a wall or the like from the front with the rear end of the hood 2 jumping up, the intermediate link 60 in the upright state.
The stopper 57 of the vehicle body side link 50 prevents the hood 2 from falling down with the hood 2 toward the windshield 5, so that the possibility that the rear end of the hood 2 moves toward the windshield 5 can be eliminated.

In the first embodiment, when the hood 2 is flipped up, the intermediate link 60 stands up and holds the rear end of the hood 2 at the flip-up position. The space between the vehicle and the vehicle can be reliably secured by the intermediate link 60, and the impact of the obstacle when the obstacle such as the pedestrian falls on the hood 2 and makes a secondary collision with the vehicle can be secured. It can also be absorbed and relaxed.

Further, in the first embodiment, the hood side link 4
The engagement of the hook portion 42 with the engagement hole 53 of the vehicle body side link 50 prevents the hood 2 from moving backward in the vehicle front-rear direction X regardless of whether the hood 2 is flipped up. Not only when the vehicle collides with a wall or the like from the front with the rear end jumped up, but also when the vehicle collides with the wall or the like from the front with the hood 2 closed.
The possibility that the rear end moves toward the windshield 5 can be eliminated.

Further, in the first embodiment, the hook portion 42 of the hood side link 40 is engaged with the engagement hole 53 of the vehicle body side link 50 to prevent the hood 2 from moving backward in the vehicle longitudinal direction X. When the movement is prevented, the engagement hole 5
(3) The balance of the stress generated in the engaged portion is good, and therefore, even when the vehicle collides with a wall or the like severely from the front, the possibility that the rear end of the hood (2) moves toward the windshield (5) is eliminated. Can be.

(Second Embodiment) FIGS. 12 to 15 show a second embodiment which is an example of an embodiment in which the inventions according to claims 1 to 6 and 8 are combined. Is
13 is a plan view showing the hinge mechanism according to the second embodiment, FIG. 13 is a right side view of the hinge mechanism shown in FIG. 12 viewed from obliquely right below, and FIG. 14 is an operation explanatory view of the second embodiment. FIG. 15 is an end view of a section taken along line LL of FIG. In the following description of the second embodiment,
The same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof will not be repeated.

As shown in FIGS. 12 to 15, in the second embodiment of the present invention, the intermediate link 6 in the upright state is provided on the wall surface of the wall portion 51 of the vehicle body side link 150 on the intermediate link 60 side.
A stopper 157 is formed as a holding portion that abuts on the rear end face of the intermediate link 60 to hold the intermediate link 60 in an upright state.
0 side wall portion 158 facing the side in the vehicle width direction Y
(See FIG. 15).

Therefore, in the second embodiment, when the rear end of the hood 2 jumps up and the vehicle collides against a wall or the like from the front, the intermediate link 60 in the upright state together with the hood 2 is located on the side in the vehicle width direction Y. Even if the vehicle tries to fall backward in the vehicle front-rear direction X while turning around, the sideward movement of the stopper 157 in the vehicle width direction Y can be prevented by the side wall portion 158, so that the rear end of the hood 2 is The possibility of moving to the glass 5 side can be eliminated more reliably than in the first embodiment.

In the second embodiment, FIGS.
As shown in the figure, the end surface of the vehicle body side link 150 located below the hood side link 40 is provided with the hood side link 40.
The hook portion 153 of the vehicle-body-side link 150 that is opposed to the hook portion 42 of the hood-side link 40 at the rear in the vehicle front-rear direction X is formed as an engaged portion with which the hook portion 42 can be engaged in the vehicle front-rear direction X. Have been.

The hook 42 of the hood side link 40
As in the first embodiment, the length in the up-down direction is selected to be a length that can be engaged with the hook portion 153 of the vehicle body side link 150 regardless of the presence or absence of the hood 2 jumping up.

Therefore, in the second embodiment, similarly to the first embodiment, not only when the vehicle collides with a wall or the like from the front with the rear end of the hood 2 jumped up, but also when the hood 2 is closed. Even when the vehicle collides with a wall or the like from the front, the hook portion 42 of the hood side link 40 and the vehicle body side link 150
Of the hood 2 in the vehicle front-rear direction X can be prevented by the engagement with the hook portion 153.
The possibility that the rear end of the hood 2 moves toward the windshield 5 can be eliminated.

Further, in the second embodiment, since the engaged portion is the hook portion 153 of the vehicle body side link 150, the engaged portion is the engaging hole 53 of the vehicle body side link 50 as compared with the first embodiment. Thus, the engaged portion is reduced in size.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a front side portion of an automobile according to a first embodiment of the present invention.

FIG. 2 is a block diagram according to the first embodiment.

FIG. 3 is an explanatory diagram showing a state in which a hood is flipped up as shown in FIG. 1;

FIG. 4 is a flowchart according to the first embodiment.

FIG. 5 is a front view showing the periphery of a hinge mechanism in FIG. 1;

FIG. 6 is a plan view showing a hinge mechanism in FIG. 5;

FIG. 7 is a right side view of the device shown in FIG.

FIG. 8 is an end view of a section taken along line LL of FIG.

FIG. 9 is an operation explanatory view of what is shown in FIG. 5;

FIG. 10 is an operation explanatory view of the one shown in FIG. 5;

FIG. 11 is an end view of a section taken along line MM of FIG.

FIG. 12 is a plan view showing a hinge mechanism according to a second embodiment of the present invention.

FIG. 13 is a right side view of the device shown in FIG.

FIG. 14 is an operation explanatory view of the second embodiment.

15 is an end view of a section taken along line NN of FIG.

FIG. 16 is an explanatory view showing an example of a conventional product.

[Explanation of symbols]

 2 Hood 3 Car body 11 Hinge mechanism 12 Hood lock mechanism 13 Bumper sensor (collision detecting means) 14 Speed sensor (collision detecting means) 15 Actuator 16 Controller (control means) 40 Hood side link 41 Support point pin 42 Hood side hook (engagement) 50) 150 Body side link 53 Engagement hole (engaged part) 57, 157 Stopper (holding part) 60 Intermediate link (joining member) 80 Support pin lock mechanism 153 Hook part on vehicle body side (engaged part) 158 Side wall of stopper X Vehicle longitudinal direction Y Vehicle width direction

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasushi Matsuura Nissan Motor Co., Ltd., 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Prefecture (72) Inventor Ichiro Kaneshiro 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd.

Claims (8)

[Claims] 1. A flip-up hood, in which a collision between a front end of a vehicle and an obstacle is detected and a rear end of the hood jumps up from a vehicle body, wherein the rear end of the hood is connected to the hood side and the vehicle body side to jump up the rear end of the hood. A flip-up hood, comprising: a coupling member interlocked with movement to a position; and a holding portion for holding the coupling member at a flip-up position of the hood on the vehicle body side. 2. The flip-up hood according to claim 1, wherein the coupling member is a straight intermediate link, and one end of the intermediate link is coupled to the hood so as to be rotatable in the vehicle front-rear direction. And the other end is coupled to the vehicle body side so as to be movable and rotatable in the vehicle longitudinal direction, and the holding portion supports the intermediate link after being linked to the flip-up position from a rear side in the vehicle longitudinal direction. A flip-up hood characterized in that: 3. The flip-up hood according to claim 2, wherein the stopper has a side wall portion facing the intermediate link after being linked to the flip-up position on the lateral side in the vehicle width direction. A flip-up hood characterized by the following: 4. The flip-up hood according to claim 2, wherein an actuator for flipping a rear end of the hood from a vehicle body, and collision detecting means for detecting that a front end of the vehicle has collided with an obstacle. Control means for operating the actuator according to a detection signal from the collision detection means; a hood lock mechanism for locking a front end of the hood to a vehicle body with the hood closed; and a rear end of the hood restricted to a fixed position. A flip-up hood, which comprises: a hinge mechanism for supporting the hood so that the hood can be opened and closed, and the restraint being released when the actuator is actuated. 5. The flip-up hood according to claim 4, wherein the hinge mechanism comprises: a hood-side link provided at a rear end of the hood; a vehicle-body-side link provided to the vehicle body; An intermediate link having one end coupled to the hood-side link via a fulcrum pin, and the other end coupled to the vehicle-body-side link; and a rear end of the hood provided on the vehicle-body-side link to rotatably lock the fulcrum pin. And a fulcrum pin lock mechanism that supports the hood so as to be openable and closable and releases the lock with the operation of the actuator; and the stopper provided on the vehicle body side link. A flip-up hood characterized by: 6. The flip-up hood according to any one of claims 1 to 5, wherein one of the hood side and the vehicle body side lifts up the hood with respect to the other engaged portion. A flip-up hood having an engagement portion that can be engaged in the vehicle front-rear direction regardless of presence or absence. 7. The flip-up hood according to claim 6, wherein the engaging portion is a hook portion provided on the hood side, and the engaged portion is provided on the vehicle body side and the hook is provided. A flip-up hood characterized in that the portion is an engagement hole inserted. 8. The flip-up hood according to claim 6, wherein the engaging portion and the engaged portion are hook portions facing each other in the vehicle front-rear direction.