JP2008120117A - Vehicle hood flip-up device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle hood flip-up device capable of easily being restored after flipping up a hood, efficiently using the force of an actuator, and downsizing the actuator and reducing cost. <P>SOLUTION: When a pedestrian collides, a rod (34) of the actuator (30) is pushed up, and the rod contacts with the other end of a linkage (70) to rotate the linkage, thereby releasing the engagement of an engaging recessed portion (74), a hood bracket 50, and an engaging hook (56) of the linkage. Then, the rod contacts with the hood bracket to flip up a rear portion of a front hood (18). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle hood flip-up device, and more particularly to a technique for securing a space in an engine room by raising a vehicle hood at the time of a collision with a pedestrian and reducing an impact on the pedestrian.

2. Description of the Related Art In recent years, vehicles have been developed in consideration of pedestrian safety by providing a shock absorbing mechanism in a hood at the front of the vehicle assuming a collision with a pedestrian (a collision object).
For example, there is a technique for securing a space in an engine room by lifting the rear side of a hood at the time of a collision with a pedestrian so that the pedestrian does not hit a hard part such as an engine when the pedestrian collides with the hood.

  Specifically, at both end portions of the hood on the vehicle rear side, a link member having one end supported on the vehicle body side and the other end supported on the hood side is provided. A configuration is disclosed in which the rear portion of the hood is forcibly flipped up while being actuated by operating the actuator and damaging the second blocking portion in the event of a pedestrian collision (see Patent Document 1).

Similarly, a link member is provided with one end supported on the vehicle body side and the other end supported on the hood side, and the hook member formed on the link member is locked to the vehicle body side so that the link member is normally fixed to the vehicle body side. When the pedestrian collides, the actuator is operated to press the hanger provided on the link member, thereby deforming the hook portion connected to the hanger to release the lock, and the actuator removes the link member from the hanger. A configuration in which the hood is flipped up is disclosed (see Patent Document 2).
JP 2005-59799 A Japanese Patent No. 2004-249795

However, in the techniques disclosed in Patent Document 1 and Patent Document 2, the second blocking portion is damaged at the time of a pedestrian collision, the hood is flipped up, or the hook portion is deformed to release the engagement with the vehicle body side. Since it is a structure, there exists a problem that it cannot return easily, for example, when a hood is flipped up by malfunction.
Moreover, like the 2nd prevention part in patent document 1, it must be made to be surely damaged at the time of a pedestrian collision, while it must make it easy not to cancel fixation of a link member at the normal time, In addition, since high-precision molding is required, the cost may increase. In addition, an actuator capable of generating a sufficient force is required to reliably break the second blocking portion at the time of a pedestrian collision, which may increase the size of the actuator and further increase the cost.

In Patent Document 2, the actuator performs a deformation of the hook member through the hanger, and the hood is flipped up through the hanger provided at the intermediate position of the link member. Therefore, a relatively large force is required, There is a risk of increasing the size and cost of the actuator.
The present invention has been made to solve such a problem, and the object of the present invention is that it can be easily restored after the hood is flipped up, and the actuator force can be used efficiently. An object of the present invention is to provide a hood flip-up device for a vehicle that can realize reduction in cost and cost.

  In order to achieve the above object, the vehicle hood flip-up device according to claim 1 is a hood flip-up device provided at the front portion of the vehicle, and is located at the rear portion of the hood, with one end on the hood side, The other end is rotatably supported on the vehicle body side, and either one of the one end or the other end is a connecting member that forms a hinge mechanism for opening and closing the hood, one is provided on the connecting member, and the other is A pair of engagement members that are provided on the hood side or the vehicle body side, and one of the one and the other is configured to be movable, and are engaged with each other to fix the connecting member to the hood side or the vehicle body side. A collision detection means capable of detecting a collision between the vehicle and the object to be collided and a collision between the vehicle and the object to be collided by the collision detection means; In contact with the engaging member After releasing the engagement of the pair of engagement members, it is characterized in that continuously with an actuator operative to splashing contact with the hood and the rear portion of the hood.

In the vehicle hood flip-up device according to claim 2, the movable engagement member of the pair of engagement members is provided in the connection member, and the other engagement member is the vehicle body or It is provided in the hood.
According to a third aspect of the present invention, in the vehicle hood flip-up device, the movable engagement member of the pair of engagement members is provided on the vehicle body side, and the other engagement member is the connection member. It is characterized by being provided in.

  In a vehicle hood flip-up device according to a fourth aspect of the present invention, in any one of the first to third aspects, the movable engagement member is formed such that one end thereof is engageable with the other engagement member, The other end is formed so as to be in contact with the actuator operating portion, and has a seesaw shape that is rotatably supported at a predetermined position between the one end and the other end. By engaging with the other end and rotating, the engagement at the one end is released.

  6. The vehicle hood flip-up device according to claim 5, wherein the actuator is in direct contact with the hood, and the hinge is rotatably supported at one end of the connecting member. The vehicle body is provided with a base bracket having a hinge portion that rotatably supports the other end of the connecting member, and the other engaging member is It is formed integrally with the hood bracket or the base bracket.

  According to a sixth aspect of the vehicle hood flip-up device of the present invention, in any one of the first to fifth aspects, the pair of engaging members are engaged so that one engaging member sandwiches at least the other engaging member from above and below. It is characterized by matching.

  According to the vehicle hood flip-up device of the present invention using the above means, the actuator is activated when a collision with a pedestrian (a collision object) is detected, and the operating portion of the actuator is connected. Contact with the movable engaging member that fixes the member releases the engagement to release the coupling member, and then the actuator operating part continuously contacts the hood and jumps up. In this way, a space is secured in the engine room to reduce the impact of pedestrians.

Thus, in the hood flip-up device for a vehicle according to the first and second aspects of the present invention, the operating portion of the actuator that operates at the time of the collision comes into contact with the engaging member to release the fixing of the connecting member. Since the actuator is movable, the actuator can be disengaged with a very small force.
In addition, the actuator does not require an extra force because the operating portion of the actuator contacts the hood directly without using another member or the like and jumps up the hood.

Furthermore, since one of the engaging members that fix the connecting member is movable, the engaged state can be easily restored even if the engagement is released due to malfunction or the like and the hood is lifted.
As described above, the vehicle hood flip-up device according to claims 1 and 2 can be easily restored and the actuator force can be used efficiently, and the actuator can be reduced in size and cost. can do.

According to the vehicle hood flip-up device of the third aspect, since the movable engaging member is provided on the vehicle body side, the movement of the movable engaging member can be stabilized, and the engagement by the actuator can be stabilized. Release of engagement of the combined member can be made more reliable.
According to the vehicle hood flip-up device of the fourth aspect, the force at the time of releasing the engagement can be further reduced with a simple configuration by forming the movable engaging member in a seesaw shape.

According to the hood flip-up device for a vehicle of claim 5, the base bracket and the hood bracket support the connecting member, and the engaging member is integrally formed on one of the brackets, so that the configuration is simple. In addition, the number of parts can be reduced and the cost can be reduced.
Moreover, the intensity | strength of a hood is securable by using the site | part which the action | operation part of an actuator contacts as a hood bracket.

  According to the vehicle hood flip-up device of the sixth aspect, when the vehicle vibrates when the pair of engaging members engage so that one engaging member sandwiches the other engaging member from above and below. Etc., the engaged state can be reliably maintained, and noise due to vibration can be further suppressed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, Example 1 will be described.
Referring to FIG. 1, there is shown a schematic configuration diagram of a vehicle including a hood flip-up device according to the present invention.
As shown in FIG. 1, an engine room 2 is formed at the front of the vehicle body of the vehicle 1.

Further, front fenders 4 and 6 are respectively disposed on both side surfaces of the vehicle body front portion of the vehicle 1.
A pair of headlamps 8 and 10 are disposed at both ends in the vehicle width direction at the front end portion of the vehicle 1, and a front bumper 12 extending in the vehicle width direction is disposed below the headlamps 8 and 10. It is installed.

  In the front bumper 12, an impact sensor 14 (collision detection means) capable of detecting a collision with a pedestrian (a collision object) is provided. The impact sensor 14 is electrically connected to an ECU 16 provided in the vehicle 1. Connected. The ECU 16 is electrically connected to various sensors such as a vehicle speed sensor (not shown), various devices, and the like, and has a function of controlling various devices based on information from the various sensors.

A front hood 18 (hood) that can be opened and closed is disposed on the upper surface of the engine room 2.
When the front hood 18 is fully closed, a striker 18a provided at the front end of the front hood 18 is fixed by a latch 12a provided at an upper portion of the front bumper 12, and when opened, the front hood 18 is provided on both sides of the rear end in the vehicle width direction. The hood flip-up mechanism 20, 22 is used as a fulcrum to open upward.

Hereinafter, the hood flip-up mechanism 20 in the first embodiment will be described in detail.
FIG. 2 shows a side view of the hood flip-up mechanism 20 provided on the left side of the vehicle in the hood flip-up device for a vehicle according to the first embodiment of the present invention as viewed from the inside of the vehicle. This will be described with reference to FIG. The hood flip-up mechanism 22 provided on the right side of the vehicle has the same configuration.

  As shown in FIG. 2, the hood flip-up mechanism 20 includes an actuator 30 and a base bracket 40 fixed to the front fender 4, a hood bracket 50 fixed to the front hood 18, the hood bracket 50 and the base bracket 40. The intermediate arm 60 is connected to the intermediate arm 60 and the linkage 70 is provided on the intermediate arm 60 (movable engaging member).

  Specifically, the actuator 30 has a cylindrical shape, and is fixed to the inner side surface 4a of the front fender 4 with the vehicle vertical direction as the axial direction. The actuator 30 includes a rod-shaped rod (actuating portion) 34 extending in the coaxial direction inside a cylindrical outer portion 32, and a so-called explosive inflator 36 provided below the rod 34. It has a configuration. The rod 34 is provided in a state where the upper end portion protrudes upward from the outer shape portion 32. The actuator 30 is electrically connected to the ECU 16 and has a function of operating the inflator 36 and pushing the rod 34 upward in response to a signal from the ECU 16.

The base bracket 40 is a plate member that is in contact with the flat surface portion 4 b of the front fender 4, and is fixed to the vehicle body by bolts 42 and 42. A hinge portion 44 extending upward is formed at the rear end of the base bracket 40.
The hood bracket 50 is a plate member that is in contact with the lower surface of the front hood 18, and is fixed to the front hood 18 by bolts 52 and 52. A hinge portion 54 extending downward is formed at the vehicle front end of the hood bracket 50. On the other hand, at the rear end of the hood bracket 50, an engaging claw 56 (engaging member) having a claw that extends downward and protrudes rearward is formed at the tip. In addition, the nail | claw of the said engagement nail | claw part 56 has comprised the shape which inclined slightly so that an upper and lower side may approach as it goes back.

  The intermediate arm 60 is rotatably supported at one end by a hinge portion 44 of the base bracket 40 and at the other end by a hinge portion 54 of the hood bracket 50 via pins 62 and 64, respectively. That is, the intermediate arm 60 has one end supported by the vehicle body and the other end supported by the front hood 18, and is rotatable in the vertical direction with the pins 62 and 64 at the one end and the other end as fulcrums.

  The linkage 70 has a substantially L shape in side view with one end side extending upward and the other end side extending forward, and is provided at a bent portion at a substantially central portion of the intermediate arm 60 via a pin 72. Yes. The linkage 70 is formed with an engagement recess 74 that engages with the engagement claw 56 of the hood bracket 50 at the tip portion on one end side. The engaging recess 74 has a concave shape whose upper and lower sides are widened toward the front in accordance with the shape of the engaging claw portion 56 protruding rearward, and is engaged so as to be sandwiched from above and below the engaging claw portion 56. Match.

On the other hand, the other end of the linkage 70 is formed so as to be positioned on the axial extension of the actuator 30.
Further, a torsion spring 76 is provided around the pin 72 of the linkage 70, and the linkage 70 has a clockwise direction as viewed in FIG. 3 by the torsion spring 76, that is, the engagement recess 74 and the engagement claw 56. It is biased in the direction of engagement.

The hood flip-up mechanism 20 configured as described above collides with a pedestrian when, for example, the vehicle is traveling at a predetermined vehicle speed or higher, and the impact sensor 14 detects a collision with the pedestrian. A predetermined signal is sent from the ECU 16 to the actuator 30, and the actuator 30 is actuated to jump up the front hood 18.
The operation of the hood flip-up device for a vehicle according to the first embodiment of the present invention thus configured will be described below.

  Referring to FIGS. 3 to 5, FIG. 3 is a side view of the hood flip-up mechanism 20 when the hood flip-up device for a vehicle according to the first embodiment of the present invention is opened, and FIG. FIG. 5 is a side view of the hood flip-up mechanism 20 in the initial stage of a pedestrian collision of the hood flip-up device for a vehicle according to one embodiment. FIG. Side views of the hood flip-up mechanism 20 in the latter half of the collision are shown. Hereinafter, description will be given with reference to FIGS.

First, in the normal front hood 18 fully closed state, the hood flip-up mechanism 20 has the engagement recess 74 of the linkage 70 engaged with the engagement claw 56 of the hood bracket 50 as shown in FIG.
When the latch 12a at the front end of the vehicle 1 is released and the front hood 18 is opened, as shown in FIG. 3, the hood flip-up mechanism 20 has an engagement recess 74 of the linkage 70 and an engagement claw portion of the hood bracket 50. 56 is engaged, the intermediate arm 60 rotates together with the hood bracket 50, that is, the front hood 18 in the vehicle upward direction with the pin 62 as a fulcrum at the hinge portion 44 at the rear end of the base bracket 40.

On the other hand, when the collision with the pedestrian is detected by the impact sensor 14 while the vehicle 1 is traveling at a predetermined vehicle speed or higher, a predetermined signal is sent from the ECU 16 to the actuator 30.
In response to the signal, the actuator 30 operates the inflator 36, thereby pushing the rod 34 upward.
At this time, the front hood 18 is in a fully closed state, and when the rod 34 is pushed upward, the tip of the rod 34 first comes into contact with the other end side of the linkage 70.

  Then, as shown in FIG. 4, when the rod 34 is further pushed up, the linkage 70 rotates counterclockwise as viewed in FIG. 4 against the biasing force of the torsion spring 76, and the linkage 70. The engagement recess 74 and the engagement claw 56 of the hood bracket 50 are disengaged. Note that the upper and lower sides of the engaging claw 56 are inclined in the rotation direction of the linkage 70, and the engagement is released satisfactorily.

  When the rod 34 is further pushed up, the tip of the rod 34 comes into contact with the lower surface of the hood bracket 50 as shown in FIG. At this time, since the engagement between the engagement recess 74 of the linkage 70 and the engagement claw 56 of the hood bracket 50 has already been released, the rear portion of the front hood 18 is flipped up by the rod 34 via the hood bracket 50. It is done.

  Specifically, the front end of the front hood 18 is fixed by the latch 12a, and when the hood bracket 50 receives an upward force by the rod 34, the intermediate arm 60 is viewed from the base bracket 40 with the pin 62 as a fulcrum in FIG. The hood bracket 50 is rotated clockwise around the pin 64 with respect to the intermediate arm 60 as viewed in FIG. 5, and the rear portion of the front hood 18 is flipped upward. .

When the rear portion of the front hood 18 is flipped up in this way, the space between the front hood 18 and various devices such as an engine provided in the engine room 2 is expanded, and a pedestrian collides with the front hood 18. Can reduce the impact.
Since the linkage 70 that fixes the intermediate arm 60 to the hood 18 is normally movable like the flip-up mechanism 20 having the above-described configuration, the linkage may be caused by a slight collision or malfunction. Even if the engagement of 70 is released, the engaged state can be easily restored.

  In addition, since the linkage 70 is an L-shaped seesaw type, it can be easily molded, and the tip of the rod 34 comes into contact with the other end of the linkage 70 at the initial stage when a pedestrian collides, thereby disengaging the linkage 70. The force at the time of doing can be a small force. Furthermore, since the rod 34 of the actuator 30 comes into contact with the hood bracket 50 and jumps up the front hood 18 in the later stage at the time of the pedestrian collision, the force of the actuator 30 is directly transmitted to the front hood 18, so no extra force is required. The front hood 18 can be flipped up efficiently. At this time, since the rod 34 is in direct contact with the hood bracket 50, the strength of the front hood 18 can be ensured. Further, since the hood bracket 50 supports the intermediate arm 60 and the engaging claw portion 56 is integrally formed, the configuration can be simplified, and the number of parts can be reduced.

Further, since the engagement recess 74 of the linkage 70 engages the engagement claw 56 of the hood bracket 50 from above and below, the engagement state can be reliably maintained even when the vehicle 1 vibrates. Furthermore, noise due to vibration can be suppressed.
From the above, in the vehicle hood flip-up device according to the first embodiment of the present invention, the force of the actuator 30 can be used efficiently, and the actuator 30 can be reduced in size and cost. .

Next, a second embodiment will be described.
Referring to FIG. 6, there is shown a side view of the flip-up mechanism 120 in the vehicle hood flip-up device according to the second embodiment of the present invention. In the second embodiment, the configuration other than the hood flip-up mechanism 120 is the same as that of the first embodiment, and detailed description of the same configuration is omitted.

As shown in FIG. 6, the hood jumping mechanism 120 in the second embodiment includes an actuator 130, a base bracket 140, a hood bracket 150, an intermediate arm 160, and a linkage 170.
Specifically, the actuator 130 has a configuration in which the rod 134 and the inflator 136 are provided in the outer shape portion 132 as in the first embodiment, and is fixed to the inner side surface 4 a of the front fender 4.

The base bracket 140 is fixed to the flat portion 4b of the front fender 4 with bolts 142, 142, and a hinge portion 144 extending upward is formed at the front end. On the other hand, an engaging claw portion 146 is formed at the rear portion of the base bracket 140. The engaging claw portion 146 has a claw that extends upward and projects forward.
The hood bracket 150 is fixed to the lower surface of the front hood 18 by bolts 52, 52, and a hinge portion 154 protruding downward is formed at the rear end of the vehicle.

The intermediate arm 160 is rotatably supported at one end by a hinge part 144 of the base bracket 140 and the other end by a hinge part 154 of the hood bracket 150 via pins 162 and 164, respectively.
The linkage 170 has a substantially L shape in side view with one end extending downward and the other end extending forward, and is provided at a bent portion at a substantially central portion of the intermediate arm 160 via a pin 172. . An engagement recess 174 that engages with the engagement claw 146 of the base bracket 140 is formed at one end of the linkage 170. On the other hand, the other end of the linkage 170 is positioned on the axial extension of the actuator 130. Further, a torsion spring 176 is provided around the pin 172 of the linkage 170, and the linkage 170 has a clockwise direction as viewed in FIG. 6 by the torsion spring 176, that is, an engagement recess 174 and an engagement claw 146. It is biased in the direction of engagement.

  As described above, in the hood flip-up mechanism 120 according to the second embodiment, the hinge portion 144 of the base bracket 140 is formed on the front side, and the hinge portion 154 of the hood bracket 150 is formed on the rear side. In addition, an engagement claw portion 146 is formed on the base bracket 140 on the vehicle body side, and one end of the linkage 170 on which the engagement recess 174 is formed has a shape extending downward.

The operation of the hood flip-up device for a vehicle according to the second embodiment of the present invention thus configured will be described below.
Referring to FIGS. 7 to 9, FIG. 7 shows a side view of the hood flip-up mechanism 120 when the hood flip-up device for a vehicle according to the second embodiment of the present invention is opened, and FIG. FIG. 9 is a side view of the hood flip-up mechanism 120 at the initial stage of a pedestrian collision of the hood jump device for a vehicle according to the second embodiment. FIG. 9 shows a pedestrian of the hood jump device for a vehicle according to the second embodiment of the present invention. Side views of the hood flip-up mechanism 120 in the latter half of the collision are shown. Hereinafter, a description will be given with reference to FIGS.

First, in the normal state of the front hood 18 fully closed, the hood flip-up mechanism 120 has the engagement portion 174 of the linkage 170 engaged with the engagement claw portion 146 of the base bracket 140 as shown in FIG.
When the front hood 18 is opened, as shown in FIG. 7, the hood flip-up mechanism 120 is engaged with the engagement recess 174 of the linkage 170 and the engagement claw 146 of the base bracket 140. The front hood 18 rotates together with the hood bracket 150 in the upward direction of the vehicle with the pin 164 at the other end of 160 as a fulcrum.

On the other hand, at the time of a pedestrian collision, the actuator 130 operates the inflator 136 according to a signal from the ECU 16, thereby pushing the rod 134 upward.
Then, as shown in FIG. 8, when the tip of the rod 134 contacts the other end of the linkage 170, the linkage 170 rotates counterclockwise as viewed in FIG. 8 against the biasing force of the torsion spring 176. The engagement between the engagement portion 174 of the linkage 170 and the engagement claw portion 146 of the base bracket 140 is released.

Further, when the rod 134 is further pushed up, as shown in FIG. 9, the tip of the rod 134 comes into contact with the lower surface of the hood bracket 150, and the rear portion of the front hood 18 is flipped up.
Specifically, in the second embodiment, when the hood bracket 150 receives an upward force by the rod 134, the intermediate arm 160 rotates clockwise with respect to the base bracket 140 as viewed in FIG. At the same time, the hood bracket 150 pivots counterclockwise as viewed in FIG. 9 with the pin 164 as a fulcrum with respect to the intermediate arm 160, so that the rear portion of the front hood 18 is flipped upward.

In the vehicle hood flip-up device according to the second embodiment of the present invention having the above-described configuration, the same effects as in the first embodiment can be obtained.
Next, a third embodiment will be described.
Referring to FIG. 10, there is shown a side view of the flip-up mechanism 220 in the vehicle hood flip-up device according to the third embodiment of the present invention. In the third embodiment, the configuration other than the hood flip-up mechanism 220 is the same as that of the first embodiment, and detailed description of the same configuration is omitted.

As shown in FIG. 10, the hood jumping mechanism 220 in the third embodiment includes an actuator 230, a base bracket 240, a hood bracket 250, an intermediate arm 260, and a linkage 270.
Specifically, the actuator 230 has a configuration in which the rod 234 and the inflator 236 are provided in the outer portion 232 as in the first embodiment, and is fixed to the inner side surface 4 a of the front fender 4.

The base bracket 240 is fixed to the flat portion 4b of the front fender 4 by bolts 242, 242 and a hinge portion 244 protruding upward is formed at the front end. On the other hand, a linkage hinge portion 246 protruding upward is formed at the rear portion of the base bracket 240.
A linkage 270 is rotatably supported by the linkage hinge portion 246 via a pin 272.

  The linkage 270 has a substantially L shape in side view with one end extending upward and the other end extending forward. An engagement recess 274 is formed at one end of the linkage 270. On the other hand, the other end of the linkage 270 is formed such that the tip is positioned on the axial extension of the actuator 230. Further, a torsion spring 276 is provided around the pin 272 of the linkage 270, and the linkage 270 is biased clockwise by the torsion spring 276 as viewed in FIG.

The hood bracket 250 is fixed to the lower surface of the front hood 18 by bolts 252 and 252, and a hinge portion 254 protruding downward is formed at the rear end of the vehicle.
The intermediate arm 260 is rotatably supported at one end by the hinge portion 244 of the base bracket 240 and the other end by the hinge portion 254 of the hood bracket 250 via pins 262 and 264, respectively.

In addition, an engaging claw portion 266 that has a claw that extends downward and protrudes rearward at the tip portion is formed at the central portion of the intermediate arm 260. The engagement claw portion 266 can engage with the engagement recess 274 of the linkage 270.
As described above, in the hood flip-up mechanism 220 in the third embodiment, the arrangement of the linkage 170 and the engagement recess 146 in the second embodiment is reversed, and the engagement claw portion 266 is provided on the intermediate arm 260 side. In this configuration, a linkage 270 is provided on the base bracket 240 on the vehicle body side.

The operation of the hood flip-up device for a vehicle according to the second embodiment of the present invention thus configured will be described below.
Referring to FIGS. 11 to 13, FIG. 11 is a side view of the hood flip-up mechanism 220 when the hood flip-up device for a vehicle according to the third embodiment of the present invention is opened, and FIG. FIG. 13 is a side view of the hood flip-up mechanism 220 at the initial stage of a pedestrian collision of the hood jump device for a vehicle according to the third embodiment. FIG. 13 shows a pedestrian of the hood flip-up device for a vehicle according to the third embodiment of the present invention. Side views of the hood flip-up mechanism 220 in the latter half of the collision are shown. Hereinafter, a description will be given based on FIGS. 10 to 13.

First, in the normal state of the front hood 18 fully closed, the hood flip-up mechanism 220 has the engagement recess 274 of the linkage 270 engaged with the engagement claw 266 of the intermediate arm 260 as shown in FIG.
When the front hood 18 is opened, the hood flip-up mechanism 220 is engaged with the engagement recess 274 of the linkage 270 and the engagement claw 266 of the intermediate arm 260 as shown in FIG. The front hood 18 rotates together with the hood bracket 250 with the pin 264 at the other end of the 260 as a fulcrum.

On the other hand, at the time of a pedestrian collision, the actuator 230 activates the inflator 236 according to a signal from the ECU 16, thereby pushing the rod 234 upward.
Then, as shown in FIG. 12, when the tip of the rod 234 contacts the other end of the linkage 270, the linkage 270 rotates counterclockwise as viewed in FIG. 12 against the biasing force of the torsion spring 276. The engagement recess 274 of the linkage 270 and the engagement claw 266 of the intermediate arm 260 are released.

Further, when the rod 234 is further pushed up, as shown in FIG. 13, the tip of the rod 234 comes into contact with the lower surface of the hood bracket 250, and the rear portion of the front hood 18 is flipped up as in the second embodiment.
As described above, the vehicle hood flip-up device according to the third embodiment can achieve the same effects as those of the first and second embodiments. Moreover, in the third embodiment, since the movable linkage 270 is provided on the base bracket 240 on the vehicle body side that is a non-movable part, the movement of the linkage 270 can be stabilized, and the actuator 230 can be stabilized. The release of the engagement between the linkage 270 and the engaging claw 266 can be ensured.

Although the description about embodiment of the hood flip-up apparatus of the vehicle which concerns on this invention is finished above, embodiment is not restricted to the said embodiment.
For example, in the above embodiment, the linkage has an L shape in side view, but the shape of the linkage is not limited to this, and other shapes may be used as long as the seesaw shape is used.

Further, in the above embodiment, as the pair of engaging members, the engaging recess is formed in the linkage and the engaging claw is formed on the vehicle body side or the hood side. The structure by which the engagement recessed part was formed in the food | hood side may be sufficient. Further, the pair of engaging members is not limited to the shape of the claw portion and the concave portion.
Further, in the above embodiment, the inflator is explosive type, but it is sufficient if the rod can be pushed up when a pedestrian collision is detected. For example, a spring or the like released at the time of a pedestrian collision may be used. .

  In the first embodiment, the engagement claw portion is provided on the hood side and the linkage is provided on the intermediate arm. Conversely, the linkage may be provided on the hood side and the engagement claw portion may be provided on the intermediate arm. .

1 is a schematic configuration diagram of a vehicle including a hood flip-up device according to the present invention. It is the side view which looked at the hood flip-up mechanism provided in the vehicle left side in the vehicle hood flip-up apparatus concerning the 1st example of the present invention from the vehicle inside. It is a side view of the hood raising mechanism at the time of opening of the hood raising apparatus of vehicles concerning a 1st example. It is a side view of the hood raising mechanism in the initial stage at the time of pedestrian collision of the hood raising apparatus of the vehicle concerning the 1st example. It is a side view of the hood raising mechanism in the latter stage at the time of pedestrian collision of the hood raising apparatus of the vehicle concerning the 1st example. It is a side view of the hood flipping-up mechanism in the hood flipping-up apparatus of the vehicle which concerns on 2nd Example of this invention. It is a side view of the hood raising mechanism at the time of opening of the hood raising apparatus of vehicles concerning a 2nd example. It is a side view of the hood raising mechanism in the initial stage at the time of pedestrian collision of the hood raising apparatus of the vehicle concerning a 2nd example. It is a side view of the hood raising mechanism in the latter stage at the time of a pedestrian collision of the hood raising apparatus of the vehicle concerning the 2nd example. It is a hood flip-up mechanism side view in the vehicle hood flip-up apparatus according to the third embodiment of the present invention. It is a side view of the hood raising mechanism at the time of opening of the hood raising apparatus of vehicles concerning a 3rd example. It is a side view of the hood raising mechanism in the initial stage at the time of pedestrian collision of the hood raising apparatus of the vehicle concerning a 3rd example. It is a side view of the hood flip-up mechanism in the latter stage at the time of pedestrian collision of the hood flip-up device for a vehicle according to the third embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Engine room 4, 6 Front fender 12 Front bumper 14 Impact sensor (collision detection means)
16 ECU
18 Front hood (hood)
20, 22, 120, 220 Hood raising mechanism 30, 130, 230 Actuator 34, 134, 234 Rod (actuating part)
40, 140, 240 Base bracket 44, 54, 144, 154, 244, 254 Hinge part 50, 150, 250 Hood bracket 56, 146, 266 Engaging claw part (engaging member)
60, 160, 260 Intermediate arm (connecting member)
62, 64, 162, 164, 262, 264 pins 70, 170, 270 linkage (movable engaging member)
74, 174, 274 Engaging recess 76, 176, 276 Torsion spring

Claims (6)

A hood flip-up device provided at the front of the vehicle,
A connecting member located at the rear of the hood, one end of which is pivotally supported on the hood side and the other end of the hood is pivotally supported, and either one of the one end or the other end forms a hinge mechanism for opening and closing the hood; ,
One is provided on the connecting member, the other is provided on the hood side or the vehicle body side, and one of the one and the other is configured to be movable, and the connecting member is engaged with each other to A pair of engaging members fixed to the hood side or the vehicle body side;
A collision detection means capable of detecting a collision between the vehicle and a collision object;
When the collision detection unit detects a collision between the vehicle and the object to be collided, the operation unit continuously contacts the movable engagement member and releases the engagement of the pair of engagement members. An actuator that contacts the rear of the hood and operates to flip up the hood;
A hood flip-up device for a vehicle, comprising:   2. The vehicle according to claim 1, wherein a movable engaging member of the pair of engaging members is provided on the connecting member, and the other engaging member is provided on the vehicle body or the hood. Hood jumping device.   2. The vehicle hood jump according to claim 1, wherein a movable engaging member of the pair of engaging members is provided on the vehicle body side, and the other engaging member is provided on the connecting member. Lifting device.   The movable engagement member is formed such that one end thereof is engageable with the other engagement member and the other end is in contact with the operating portion of the actuator. It has a seesaw shape that is rotatably supported at a predetermined position between the actuators, and the engagement of the one end is released when the operating portion of the actuator contacts and rotates with the other end. The hood jumping device for a vehicle according to any one of claims 1 to 3. The hood is provided with a hood bracket having a hinge portion that directly contacts the operating portion of the actuator and rotatably supports one end of the connecting member;
The vehicle body is provided with a base bracket having a hinge portion that rotatably supports the other end of the connecting member,
The hood jumping apparatus for a vehicle according to any one of claims 1 to 4, wherein the other engagement member is formed integrally with the hood bracket or the base bracket.   6. The vehicle hood flip-up according to claim 1, wherein the pair of engaging members engage with each other such that one engaging member sandwiches at least the other engaging member from above and below. apparatus.

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