JP4645132B2 - Automotive hood stopper structure - Google Patents

Description

  The present invention relates to an automobile hood stopper structure in which stopper means that functions as a cushioning material when a hood provided at the front of a vehicle body is closed is provided between the hood and the vehicle body side member.

Conventionally, as shown in Patent Document 1 below, in a support structure for a hood end portion of an automobile that is supported by a vehicle body side receiving portion via a hood damper made of an elastic material such as rubber, And at least one of the hood end portion and the hood end portion is provided with a buffer portion made of a support bracket having a trapezoidal cross section that can be deformed when the hood end portion is pushed with a load equal to or higher than a set value. A hood damper is disposed between the two.
Japanese Utility Model Publication No. 63-11020

  In the invention disclosed in Patent Document 1, when the hood is closed, the hood damper is elastically deformed to absorb impact energy that acts when the hood is closed, and the pedestrian's head collides with the hood. When a collision accident such as the above occurs, the shock applied to the pedestrian's head or the like can be alleviated to some extent by deforming the buffer portion and absorbing impact energy.

  However, even when the support bracket serving as the buffer portion is deformed when the collision accident occurs, if the stopper supported by the support bracket is sandwiched between the hood and the vehicle body side member, There is a problem that it is difficult to effectively absorb the impact energy acting on the hood. That is, in order to prevent the hood from vibrating due to the elastic deformation of the stopper when the automobile is running, it is necessary to use a rubber material or the like constituting the stopper having a predetermined hardness. . Therefore, when a collision accident such as a pedestrian's head hitting the hood occurs, the support bracket serving as the buffer portion is deformed when the stopper is sandwiched between the hood and the vehicle body side member. There is a problem that the effect of absorbing the impact energy due to the effect cannot be fully exhibited.

  In the invention disclosed in Patent Document 1, the vehicle body side member to which the support bracket serving as a cushioning material is attached is provided with a relief hole into which the lower portion of the stopper supported by the support bracket is dropped, thereby When a collision accident occurs, the stopper supported by the support bracket is prevented from being sandwiched between the hood and the vehicle body side member.

  However, in order to ensure that the lower part of the stopper is dropped into the escape hole formed in the vehicle body side member as described above, it is necessary to set the diameter of the escape hole to a considerably large value. Therefore, there is a problem that the strength of the vehicle body side member to which the support bracket is attached is likely to be lowered, and it is difficult to sufficiently secure the attachment strength of the support bracket. In particular, when the stopper is installed on the upper surface of the shroud upper located at the front end of the vehicle body and a large-diameter relief hole into which the lower portion of the stopper is dropped is formed, the sealing performance at the installation portion of the shroud upper is improved. There is a problem that the cooling performance of the radiator is likely to be lowered due to the reduction and the hot air in the engine room being introduced into the radiator installation portion through the escape hole.

  The present invention has been made in view of the above-described problems, and in the event of a collision accident such as a pedestrian's head hitting a hood, an impact applied to the pedestrian's head with a simple configuration. An object of the present invention is to provide an automobile hood stopper structure that can effectively relieve the above.

The invention according to claim 1 is a vehicle hood stopper structure in which stopper means that functions as a cushioning material is provided between the hood and the shroud upper when the hood provided at the front of the vehicle body is closed. A substantially vertical load is configured to be input to the stopper means. The stopper means includes a support portion that supports the stopper, and a rear lower side according to a load that is input to the stopper from an obliquely upper front side. A support bracket provided with a displaceable displacement portion, and a retreat space for avoiding interference with the stopper means when the stopper means is displaced downward, is provided on the upper surface of the shroud upper , and The retreat space is such that the support bracket is sandwiched between the hood and the shroud upper when the support bracket is displaced rearward and lower. In which is disposed at a position that may be avoided.

According to a second aspect of the present invention, there is provided an automobile hood having a stopper made of an elastic body and having stopper means functioning as a buffer when the hood provided at the front portion of the vehicle body is closed between the hood and the shroud upper. In the stopper structure, the stopper means is supported by the shroud upper so that it can be displaced downward, and a retreat space for avoiding interference with the stopper when the stopper means is displaced downward is provided on the upper surface of the shroud upper. The retracting space is provided between the upper surface portion and the rear surface portion of the shroud doorper with the front end positioned on the rear side of the vehicle body with respect to the front end of the stopper, and is located behind the rear surface portion of the shroud upper. It is provided with a recess allowing the stopper to be displaced on the side.

According to a third aspect of the present invention, there is provided an automobile having a stopper made of an elastic body, and stopper means that functions as a buffer when the hood provided at the front portion of the vehicle body is closed between the hood and the shroud upper. In the hood stopper structure, the stopper means is supported by the shroud upper so that it can be displaced downward, and a retreat space for avoiding interference with the stopper when the stopper means is displaced downward is provided on the upper surface of the shroud upper. The retracting space is provided between the upper surface portion and the rear surface portion of the shroud upper with the front end positioned on the rear side of the vehicle body from the front end of the stopper. The value is set smaller than the total length of the stopper.

According to a fourth aspect of the present invention, in the hood stopper structure for an automobile according to any one of the first to third aspects, the retreat space shields airtightly between an upper space and a lower space of the shroud upper. It is comprised by the recessed part provided with the partition.

According to the invention according to claim 1, when a collision accident such as a pedestrian's head hits the hood and a load of a certain value or more is input to the stopper means, the stopper means is The above pedestrian ensures a sufficient hood lowering stroke by moving to a retreat space provided on the upper surface of the shroud upper and preventing occurrence of a situation where the stopper means is sandwiched between the hood and the shroud upper. There is an advantage that the impact applied to the head or the like can be effectively mitigated. Also, when closing the hood, the impact energy is sufficiently absorbed by the stopper held by the support bracket, and a collision accident such as a pedestrian's head hitting the hood occurs from the upper front side. When a load of a certain value or more is input to the support bracket via the stopper, the support bracket is moved to the hood and shroud door upper when the displacement part of the support bracket is displaced and the stopper moves obliquely backward and downward. To prevent the object from being caught between the pedestrian and the pedestrian's head, and the like.

According to the second aspect of the present invention, the stopper is moved diagonally backward and rearward in response to a load greater than a certain value input from the diagonally forward upper side when a collision accident such as a pedestrian's head hits the hood. By moving into the retreat space disposed on the side, it is possible to prevent the situation in which the stopper is sandwiched between the hood and the shroud upper without increasing the front and rear dimensions of the retreat space. In addition, by moving the stopper into a retracting space formed by a recess provided between the upper surface portion and the rear surface portion of the shroud door according to the load, the stopper can be effectively used in the rear space of the shroud door upper. It is possible to effectively prevent pinching between the hood and the shroud upper.

According to the invention of claim 3, when a collision accident such as a pedestrian's head hits the hood and a load greater than a certain value is input to the stopper obliquely from the upper front, By accommodating a part in the retreat space provided on the rear upper part of the shroud upper, it is possible to effectively use the rear space of the shroud upper and effectively prevent the stopper from being sandwiched between the hood and the shroud upper There is an advantage that can be prevented.

According to the invention of claim 4 , the hot air in the engine room is introduced from the upper side of the shroud upper into the radiator installation part, and the cooling performance of the radiator is not lowered. When a collision accident such as a head collision occurs and a load greater than a certain value is input to the stopper means obliquely from the upper front side, the stopper means is prevented from being sandwiched between the hood and the shroud upper. There is an advantage that an impact applied to a pedestrian's head can be effectively reduced.

FIG. 1 shows a front vehicle body provided with a hood stopper structure for an automobile according to a first embodiment of the present invention. The front vehicle body has an engine room 4 surrounded by a shroud upper 1 provided at the front, a front fender panel 2 provided at both left and right sides, and a dash panel 3 provided at the rear. A hood 5 that opens and closes the upper end opening is provided. The hood 5 is swung with the hood hinge 6 disposed between the lower surface of the rear end portion and the upper surface of the rear end portion of the front fender panel 2 as a fulcrum, thereby closing the upper end opening of the engine room 4. It is supported so as to be displaceable between the opened state and the opened state.

  In addition, a hood lock (not shown) for holding the hood 5 in a closed state is provided between the lower surface of the front end portion of the hood 5 and the upper surface of the shroud upper 1, and stoppers 7 are provided at four locations on the shroud upper 1. Is provided. The stopper 7 is formed in a cylindrical body by an elastic body such as a synthetic rubber material, and is supported by a support bracket 8 attached to the shroud upper 1 as shown in FIGS. 2 and 3. The support bracket 8 constitutes stopper means that functions as a cushioning material when the hood 5 is closed.

  That is, the support bracket 8 includes a first leg 10 that is fastened to a mounted portion of the shroud upper 1 by a mounting bolt 9, and a top plate that extends from the upper end of the first leg 10 to the front side of the vehicle body. A portion 11 and a second leg portion 13 having an upwardly inclined portion 12 connected to the front end portion of the top plate portion 11 are provided. The second leg portion 13 of the support bracket 8 is provided with a flange 14 that protrudes from the lower end portion of the inclined portion 12 toward the front side of the vehicle body, and an insertion hole 16 for the mounting bolt 15 is provided in the flange 14. Is formed. At the center portion of the top plate portion 11, a support portion for the stopper 7, which is a support hole 17 into which the stopper 7 is fitted, is formed, and the peripheral portion of the support hole 17 is formed in a spiral shape. Yes. Further, a male thread-like protrusion 7a is formed in the lower part of the stopper 7, and the protrusion 7a is screwed into the support hole 17 so that the stopper 7 is fitted into the support hole 17. Yes.

  The stopper 7 supported by the support bracket 8 is disposed so that the lower surface of the hood inner panel 21 provided on the lower surface of the hood 5 comes into contact with the stopper 7, and is indicated by an arrow α in FIG. 3 when the hood 5 is closed. Thus, when a load in the substantially vertical direction is input to the stopper 7, the impact energy when the hood is closed is absorbed by elastically deforming according to this load, and the vibration of the hood 5 when the automobile is running is absorbed. It is regulated by the stopper 7.

  The first leg portion 10 is formed with an insertion hole 18 through which the mounting bolt 9 is inserted at the lower end portion, and a long slit-shaped first slit 19 and a second slit 20 are continuous on the upper side thereof. The reinforcing flange portions 10 a are provided on the left and right side portions of the first leg portion 10. In addition, an elongated third slit 22 communicating with the rear edge of the support hole 17 is formed at the upper end of the first leg 10 and the rear part of the top plate 11, and the support bracket 8. The top plate 11 has a fourth slit 23 formed of a U-shaped notch communicating with the front edge of the support hole 17.

  Between the insertion hole 18 of the mounting bolt 9 and the first slit 19 positioned thereabove, a first blocking portion having a predetermined width that restricts the screw shaft of the mounting bolt 13 from entering the first slit 19. The first entry restricting means 24 is provided, and a screw shaft of the mounting bolt 13 is provided between the first slit 19 installed above the insertion hole 18 and the first slit 20 located above the first slit 19. Is provided between the first slit 20 and the second slit 22, and is provided with a second entry restricting means comprising a second closing portion 25 having a predetermined width for restricting entry of the first slit 20 into the first slit 20 on the upper side. Is provided with a third entry restricting means comprising a third closing portion 26 having a larger width dimension than the first and second closing portions 26.

  The shroud upper 1 has a rear wall portion 27 that is inclined rearwardly downward. The first leg portion 10 of the support bracket 8 is attached to the rear wall portion 27 with a mounting bolt 9, and the front surface of the shroud upper 1 is frontward. The second leg portion 13 of the support bracket 8 is configured to be attached to the portion by a mounting bolt 15. Further, when the stopper 7 fitted in the support hole 17 is displaced obliquely rearward and downward on the rear surface of the upper surface of the shroud upper 1, it avoids interference with the stopper 7 and is detached from the support hole 17. A retreat space comprising a recess 28 serving as a storage portion for the stopper 7 is provided.

  When a load of a certain value or more is applied in a direction along a rearwardly inclined surface where the first leg portion 10 of the support bracket 8 and the rear wall portion 27 of the shroud upper 1 are installed, the first to first When the three closing portions 24 to 26 are sequentially broken by the screw shaft of the mounting bolt 15, the screw shaft enters the first to third slits 19, 20, and 22, and The fastening force of the first leg 10 by the mounting bolt 15 and the first to first so that the first leg 10 of the support bracket 8 moves downward along the wall 27 and the stopper 7 is displaced downward. The breaking strength and the like of the third closing portions 24 to 26 are set.

  As described above, an automobile hood in which the stopper means comprising the stopper 7 and the support bracket 8 functioning as a cushioning material when the hood 5 provided at the front of the vehicle body is closed is provided between the hood 5 and the shroud upper 1. In the stopper structure, the stopper 7 is supported by the shroud upper 1 in a state in which the stopper 7 can be displaced downward by the support bracket 8, and the upper surface of the shroud door upper 1 interferes with the stopper 7 when the stopper 7 is displaced downward. According to the configuration in which the recess 28 serving as a retreat space for avoiding the collision is generated, a collision accident such as a collision of the head of the pedestrian with the hood 5 occurs and the stopper 7 supported by the support bracket 7 is fixed. When a load greater than the value is input, the stopper 7 is moved to the lower retreat space so that the stopper 7 And while prevented from being sandwiched between the shroud upper 1, there is an advantage that by sufficiently secured downward stroke of the hood 5 the impact applied to the head or the like of the pedestrian can be effectively reduced.

  That is, as shown in FIG. 4 when a pedestrian collides with the front of the vehicle body when the vehicle is running, a collision accident occurs such that the pedestrian falls on the hood 5 and the pedestrian's head hits the hood 5. When the stopper 7 is displaced downward due to a plastic load of the support bracket 8 when a larger load is applied than when the hood 5 is closed, the concave portion 28 for allowing the stopper 7 to be displaced downward is formed in the shroud. Since it is formed on the upper surface of the upper 1, it is possible to effectively suppress the occurrence of a situation in which the lowering of the stopper 7 is hindered by the shroud upper 1 and is sandwiched between the hood 5 and the shroud upper 1. Therefore, even when a short pedestrian such as a child falls on the hood 5 and the head collides with the stopper 7 in the vicinity of the installation portion of the stopper 7, the front end of the hood 5 is sufficiently lowered. By doing so, the impact applied to the pedestrian's head or the like can be effectively mitigated.

  Also, when a pedestrian collides with the front of the vehicle body while the car is running and a collision accident occurs such as the pedestrian falls on the hood 5 and the pedestrian's head hits the hood 5 as shown in FIG. As shown by an arrow β in FIG. 3, the stopper 7 is displaced rearward and downward in response to a load equal to or greater than a certain value input from the obliquely forward upper side with respect to the stopper 7. Therefore, as shown in the first embodiment, the concave portion 28 serving as a retracting space for the stopper means having the stopper 7 made of an elastic body is supported by the rear upper portion of the shroud upper 1, that is, the stopper 7 supported by the support bracket 8. The front end of the concave portion 28 is positioned on the rear side of the vehicle body with respect to the front end, and the concave portion 28 serving as a retracting space for the stopper means is disposed below the upper surface of the shroud upper 1. When a collision accident such as a pedestrian's head hitting the hood 5 occurs and the stopper 7 is displaced diagonally backward and downward, the hood 5 and the shroud upper 1 are It is possible to effectively reduce the impact applied to the pedestrian's head and the like by preventing the occurrence of a situation in which the stopper 7 is sandwiched between them. There is a point.

  Furthermore, in the said 1st Embodiment, the 1st leg attached to the to-be-attached part which is provided in the back part 27 provided in the back part and the support part (support hole 17) which supports the said stopper 7, and the shroud doorper 1 is provided. The support bracket 8 is provided with a portion 10, and the first leg portion 10 of the support bracket 8 and the rear wall portion 27 of the shroud upper 1 are installed along a rearwardly inclined surface. The first leg portion 10 of the support bracket 8 is configured to be movable rearward and downward along the rear wall portion 27 of the shroud upper 1 when a load of a certain value or more is applied in the direction β along Correspondingly, when the stopper 7 is moved obliquely rearward and downward, the retraction slot comprising the recess 28 is located at a position where the stopper 7 can be prevented from being sandwiched between the hood 5 and the shroud upper 1. When the hood 5 is closed, the stopper 7 can effectively function as a cushioning material, and a pedestrian collides with the front of the vehicle body when the vehicle is running, as shown in FIG. Thus, when a pedestrian falls on the hood 5 and a collision accident occurs such as the pedestrian's head hits the hood 5, the advantage that the impact applied to the pedestrian's head can be effectively reduced. There is.

  That is, when the hood 5 is closed, the hood 5 swings and displaces with the hood hinge 6 provided at the rear end thereof as a fulcrum, so that a load in a substantially vertical direction is applied as shown by an arrow α in FIG. Since it is input to the stopper 7 and the support bracket 8, a component force in the direction γ that presses the first leg portion 10 of the support bracket 8 against the rear wall portion 27 of the shroud upper 1 acts. Therefore, when the hood 5 is closed, the load acting in the substantially vertical direction α is stabilized by both the friction resistance corresponding to the component force and the movement resistance corresponding to the fastening force of the mounting bolt 9. There is an advantage that it is possible to support, and it is possible to effectively prevent the support bracket 8 from being plastically deformed and the mounting position of the first leg 10 from being displaced.

  On the other hand, when a collision accident such as a pedestrian's head hitting the hood 5 occurs, as shown by an arrow β in FIG. Since the load is input along the inclined surface that is lowered after the rear wall portion 27 is installed, the load is input in a direction γ that presses the first leg portion 10 of the support bracket 8 against the rear wall portion 27 of the shroud upper 1. Force does not act. Accordingly, at the time of occurrence of the collision accident, by displacing the displacement portion formed of the first leg portion 10 of the support bracket 8 along the rear wall portion 27 of the shroud upper 1 at a relatively early stage. As shown in FIG. 5, the impact energy can be effectively absorbed by plastically deforming the support bracket 8.

  In particular, in the first embodiment, the mounting bolt 9 is provided on the mounted portion of the vehicle body side member formed of the rear wall portion 27 of the shroud doorper 1, and the screw of the mounting bolt 9 is attached to the first leg portion 10 of the support bracket 8. An insertion hole 18 through which a rod-shaped member made of a shaft is inserted, a rear wall portion 27 of the shroud doorper 1 and a first leg portion 10 of the support bracket 8 are installed in a direction along a downwardly inclined surface. Since the first slit 19 and the like in which the rod-shaped member slides and displaces when the load of the load is applied, a collision accident such as a pedestrian's head colliding with the hood 5 occurs, and along the inclined surface. When a load of a certain value or more is applied to the support bracket 8 in the direction, the impact energy is absorbed by moving the first leg portion 10 of the support bracket 8 downward while guiding the first leg portion 10 of the support bracket 8 by the rod-shaped member. More, there is an advantage that stable can be alleviated by the impact applied to the head, etc. of the walker.

  In the first embodiment, the stopper 7 detached from the support hole 17 provided in the support bracket 8 is configured to be accommodated in the recess 28 provided in the rear end portion of the upper surface of the shroud upper 1. There is an advantage that it is possible to effectively prevent the stopper 7 from being lost or biting into the auxiliary machine or the like in the engine room 4. Furthermore, when the reinforcing flange portions 10a are provided on both the left and right sides of the first leg portion 10 as described above, when a load of a certain value or more is input to the support bracket 8, the first leg portion 10 is provided. There is an advantage that it is possible to effectively prevent the occurrence of a situation in which the first leg portion 10 cannot be slid downward by being deformed.

  In the first embodiment, the rod-shaped member composed of the screw shaft of the mounting bolt 9 moves along the first slit 19 until the load input to the support bracket 8 becomes a certain value or more. Since it is configured to be controlled by the entry restricting means including the one closing portion 24, when the hood 5 is closed, the load input to the support bracket 8 is supported by the entry restricting means (first closing portion 24). Thus, the rod-shaped member can be prevented from entering the first slit 19 and the impact energy when the hood is closed can be effectively absorbed by the stopper 7.

  On the other hand, when a collision accident such as a pedestrian's head hitting the hood 5, a load of a certain value or more is input to the support bracket 8 that supports the stopper 7, and the rod-like member by the entry restriction means When the entry restriction state is released, that is, when the first closing portion 24 is broken, the rod-like member is caused to enter the first slit 19 so that the first leg portion 10 of the support bracket 8 is a vehicle body side member. By moving downward along the attached portion (the rear wall portion 27 of the shroud upper 1), the hood 5 functions effectively as a cushioning material, and the impact applied to the pedestrian's head and the like is sufficient. There is an advantage that can be relaxed. In addition, by setting the strength of the first closing portion 24 to an appropriate value, there is an advantage that the load at the time when the rod-shaped member enters the first slit 19 can be easily and appropriately set.

  Further, as described above, the support bracket 8 is provided with a support portion including the support hole 17 that supports the stopper 7 and an insertion portion including the insertion hole 18 through which the rod-shaped member provided on the vehicle body side member is inserted, Between the support portion of the stopper 7 and the insertion portion of the rod-shaped member, an entry restriction means including first to third blocking portions 24 to 26 for restricting the movement of the rod-shaped member is disposed, and the entry restriction means is sandwiched. When the plurality of slits 19, 20, and 22 are arranged in series, a collision accident such as a pedestrian's head hitting the hood 5 occurs, and the support bracket 8 that supports the stopper 7 has a constant value. When the above loads are input and the bar-shaped member entry restriction state by the plurality of entry restriction means is sequentially released from below, the rod-like member sequentially enters the plurality of slits and the first of the support bracket 8. leg 0 while moving downward along the attached portion of the vehicle body member (rear wall 27), there is an advantage that impact applied to the head or the like of the pedestrian can be effectively alleviated.

  That is, when the above-mentioned collision accident occurs, as shown by a solid line A in FIG. 6, the impact energy is absorbed by the stopper 7 elastically deforming until the time point t1 when the load input to the stopper 7 becomes a certain value or more. Is done. Next, the first to third closed portions 24 to 26 of the support bracket 8 are sequentially broken, and the impact energy is absorbed step by step at the break times t2 to t4. Is lowered along the rear wall portion 27 of the shroud upper 1 to sufficiently absorb impact energy before the hood 5 abuts against the shroud upper 1 while suppressing the peak load as compared with the conventional case, and to cushion the hood 5. The impact applied to the pedestrian's head and the like can be effectively mitigated by fully exhibiting the above.

  Further, when a rod-like member consisting of the screw shaft of the mounting bolt 9 enters the third slit 22 communicating with the support hole 17 of the stopper 7, the third slit 22 and the support hole 17 are widened at time t5. Thus, the stopper 7 can be effectively detached from the support hole 17, so that the occurrence of a situation in which the stopper 7 is sandwiched between the hood 5 and the vehicle body side member is reduced, and the hood 5 is sufficiently removed. By deforming and absorbing impact energy, the impact applied to the pedestrian's head and the like can be effectively mitigated.

  For example, when the stopper 7 is sandwiched between the hood 5 and the vehicle body side member including the shroud upper 1, the pedestrian's head or the like is placed on the hood 5 as shown by the phantom line B in FIG. After the time point t0 when an accident occurs, the load acting on the stopper 7 increases at a substantially constant rate until the time point ta when the stopper 7 is caught, and the time point ta when the pinching occurs. After this, the stopper 7 prevents the hood 5 from being deformed. As a result, the impact load applied to the head or the like of the pedestrian increases rapidly.

  On the other hand, as shown by the solid line A in FIG. 6, the stopper 7 is detached from the support hole 17 at the time t5 when a predetermined load is input to the support bracket 8 as in the first embodiment. When configured, the impact energy applied to the pedestrian's head or the like by sufficiently deforming the hood 5 at the time t5 when the stopper 7 is removed is sufficiently absorbed while the stopper 7 is released. The load can be reduced rapidly.

  In the first embodiment, the fourth slit (U) communicated with the support hole 17 of the stopper 7 at a position opposite to the installation portion of the third slit 22 provided on the support bracket 8 (front end side). When a load of a certain value or more is applied to the stopper 7, the support hole 17 is expanded and deformed by a plurality of slits 22 and 23 disposed around the support hole 17. Since a load of a certain value or more acts on the support bracket 8 and the screw shaft of the mounting bolt 13 enters the third slit 22 of the support bracket 8, There is an advantage that the stopper 7 can be easily expanded and deformed and the stopper 7 can be removed from the support hole 17 more reliably.

  In the first embodiment, the second portion having the inclined portion 12 that is attached to the vehicle body side member (the shroud upper 1) and inclined rearwardly is provided on the front side of the support hole 17 of the stopper 7 provided in the support bracket 8. Since the leg portion 13 is provided, a collision accident such as a pedestrian's head colliding with the hood 5 occurs, and a load of a certain value or more acts on the support bracket 8 in the direction β along the rearwardly inclined surface. In this case, the second leg portion 13 of the support bracket 8 is easily tilted and the support portion of the stopper 7 is moved to the rear side of the vehicle body, whereby the first leg portion 10 provided on the rear side is moved. It can be smoothly moved along the mounted portion (rear wall portion 27) of the vehicle body side member.

  That is, when a collision accident such as a pedestrian's head hits the hood 5, a load acts in a direction β substantially orthogonal to the inclined portion 12 of the second leg portion 13 as shown in FIG. 3. Therefore, a large bending moment acts in the direction δ increasing the tilting of the second leg portion 13 with the lower end portion of the inclined portion 12 as a fulcrum, and the support bracket 8 is easily plastically deformed according to the bending moment. As shown in FIG. 5, the top plate portion 11 and the inclined portion 12 of the support bracket 8 are laid down on the shroud upper 1, and the first leg portion 10 is moved along the rear wall portion 27 of the shroud upper 1. It can be lowered smoothly.

  FIG. 7 shows a first slit 29 that communicates with an insertion portion of a rod-shaped member that includes an insertion hole 18 provided in the first leg portion 10 of the support bracket 8 and a support provided in the top plate portion 11 of the support bracket 8. The support bracket 8 is provided with a second slit 30 communicating with the support portion of the stopper 7 formed of the hole 17, and an entry restricting means including a closing portion 31 is provided between the first slit 29 and the second slit 30. Thus, the second embodiment of the present invention configured to restrict the bar-like member from entering the second slit 30 until the load input to the support bracket 8 becomes a certain value or more is shown. .

  In the second embodiment, as indicated by the solid line C in FIG. 8, the impact load is absorbed by the elastic deformation of the stopper 7 until the time point t1 when the load input to the stopper 7 becomes a certain value or more. At the same time, as the load subsequently increases, the screw shaft of the mounting bolt 9 in the insertion hole 18 of the support bracket 8 enters the first slit 29, and the screw shaft is closed from this entry time t21. The first leg portion 10 of the support bracket 8 is shroud while the first leg portion 10 of the support bracket 8 is guided by the screw shaft until the time t22 at which it abuts on 31 without causing a large increase in load. By lowering along the rear wall portion 27 of the upper 1, it is possible to effectively reduce the impact applied to the pedestrian's head and the like by absorbing impact energy.

Further, as the first leg portion 10 of the support bracket 8 is lowered, the stopper 7 is displaced obliquely rearward and downward, and within a retreat space formed by a concave portion 28 formed in the upper rear portion of the shroud upper 1. As the stopper 7 moves, the screw shaft breaks the closing portion 31 and enters the second slit 30 at the time t23 when the load acting on the closing portion 31 becomes a constant value. The support hole 17 is expanded and deformed. By this support hole 17 stopper 7 at the time t2 4 was deformed and opened to a predetermined diameter is displaced to the large downward hood 5 detached from the support hole 17, the hood 5 with a peak load is suppressed than the prior art Has an advantage that the impact energy is sufficiently absorbed before it contacts the shroud upper 1.

Incidentally, instead of the penetration restricting device having upper Ki閉 covering section 31 and the like, a separate coated plates of a single slit formed in the support bracket 8 partially covers provided, the attachment bolt by the coated plates 9 The movement of the rod-shaped member composed of the screw shaft is restricted, or the movement of the rod-shaped member is restricted by partially reducing the width of the slit or partially increasing the thickness of the side portion of the slit. You may comprise as follows.

  Further, FIG. 9 shows a vehicle body side member comprising the rear wall portion 27 of the shroud doorper 1 while the screw shaft of the mounting bolt 9 is inserted into and supported by the insertion hole 32 provided in the first leg portion 10 of the support bracket 8. The mounting portion is provided with an insertion portion including an insertion hole 33 through which the screw shaft is inserted, and a long hole-like slit 34 extending downward from the lower end portion of the insertion hole 33, and the inclination of the rear wall portion 27. 3rd Embodiment of this invention comprised so that the threaded shaft of the attachment bolt 9 might be slid and displaced when the load more than a fixed value acted along a surface is shown.

  In the third embodiment, as indicated by a solid line D in FIG. 10, the impact load is absorbed by the stopper 7 elastically deforming until the time point t1 when the load input to the stopper 7 becomes a certain value or more. At the same time, as the load increases, the screw shaft of the mounting bolt 9 in the insertion hole 33 of the shroud upper 1 enters the slit 34 as shown in FIG. From this entry time t31 to the time t32 when the screw shaft contacts the lower end of the slit 34, the first leg portion 10 of the support bracket 8 guides the screw bracket without any significant increase in load. While the first leg portion 10 of the support bracket 8 is lowered along the rear wall portion 27 of the shroud upper 1, the impact applied to the pedestrian's head and the like is stably reduced. It will be.

  Then, as the first leg portion 10 of the support bracket 8 is lowered, the stopper 7 is displaced obliquely rearwardly and downwardly, and within the retreat space formed by the concave portion 28 formed in the rear upper portion of the shroud upper 1. As the stopper 7 moves and the load acting on the support bracket 8 becomes a constant value, the support hole 17 expands and the stopper 7 is detached from the support bracket 8 at a time point t33.

  When the slit 34 in which the rod-like member slides and displaces is provided in the mounted portion of the vehicle body side member formed of the rear wall portion 27 of the shroud upper 1 as in the third embodiment, the first and second embodiments described above. Thus, there is no problem that the rigidity of the support bracket 8 is lowered as in the case where the slit 19 or the like in which the rod-shaped member slides is provided in the support bracket 8, and the flange 10 a is provided in the support bracket 8. The support bracket 8 can be smoothly slid and displaced downward without bending the support bracket 8 when the above-mentioned collision accident occurs without any reinforcement such as increasing the plate thickness. Therefore, the formation of the slit 34 in the attached portion does not cause a problem such as a reduction in the rigidity of the vehicle body, and the slit 34 is provided in the attached portion according to conditions such as material, plate thickness, and shape. If this is not difficult, it is preferable to adopt the configuration of the fourth embodiment.

  On the other hand, there is a problem that the rigidity of the vehicle body is lowered due to the formation of the slit 34 in the attached portion, or it is difficult to provide the slit 34 in the attached portion depending on conditions such as the material, the plate thickness, and the shape. In some cases, it is preferable to employ a configuration in which the support bracket 8 is provided with a slit 19 through which the rod-shaped member slides and displaces as in the first and second embodiments.

As described above, the rod-shaped member formed of the screw shaft of the mounting bolt 13 is caused to enter the first slit 19 so that the first slit 19 and the support hole 17 of the stopper 7 are expanded and deformed. In place of the first to third embodiments configured as described above, a rod-shaped member made of a triangular prism-shaped wedge body or the like is used as the rear wall portion 27 of the shroud upper 1 or the first leg portion 10 of the support bracket 8 which is a vehicle body side member. A protruding structure may be used.

  13 and 14 show that the first leg portion 10 fastened to the rear wall portion 27 of the shroud upper 1 by the mounting bolt 9 has a flange portion 35 extending in the vertical direction, and a predetermined angle extending rearward from the upper end portion thereof. An inclined portion 36 extending in the inclined direction and a vertical portion 37 extending upward from the upper end portion thereof are provided, and the top plate portion 11 installed between the upper end portions of the first leg portion 10 and the second leg portion 13 is provided. The 4th Embodiment of this invention which has the support bracket 8 in which the support hole 17 of the stopper 7 was formed is shown.

  Inclined portions 36 and 12 provided on the first leg portion 10 and the second leg portion 13 of the support bracket 8 cause the pedestrian to collide with the front surface of the vehicle body and fall on the hood 5 when the vehicle is running. Is installed so as to be substantially opposite to the direction of action β of the load acting when a collision accident such as the head hitting the hood 5 occurs. Further, the lower end of the inclined portion 36 provided on the first leg portion 10 is disposed on the rear side of the vehicle body from the line of action of the load input in the substantially vertical direction α through the stopper 7 when the hood 5 is closed. In addition, the stopper 7 is disposed on the front side of the vehicle body with respect to the acting line of the load acting in the direction β for moving the stopper 7 to the rear lower side of the shroud upper 1 when the collision accident occurs, and is provided on the second leg portion 13. The lower end of the inclined portion 12 is disposed on the front side of the vehicle body from the line of action of the load input via the stopper 7 when the hood 5 is closed. In addition, the shroud upper 1 to which the support bracket 8 is attached has a larger width dimension than the support bracket 8, and a recess 38 having a rearwardly inclined surface is a shroud upper that is located at the installation part of the support bracket 8. It is provided between the upper surface part and the back surface part.

  As shown in the fourth embodiment, the first leg portion 10 disposed on the rear side of the support bracket 8 and the second leg portion 13 disposed on the front side are provided with rearwardly inclined portions 36 and 12. And the lower end of the inclined portion 36 provided on the first leg 10 is arranged on the rear side of the vehicle body from the line of action of the load input in the substantially vertical direction α through the stopper 7 when the hood 5 is closed. When the lower end of the inclined portion 12 provided on the second leg portion 13 is disposed on the front side of the vehicle body from the line of action of the load input when the hood 5 is closed, At the time of closing, as shown in FIG. 14, a moment M <b> 1 in the direction of raising the inclined portion 36 of the first leg portion 10 acts according to the load in the substantially vertical direction α input to the stopper 7 supported by the support bracket 8. And overturning the inclined portion 12 of the second leg 13 The moment M2 in the direction acts and these moments M1 and M2 cancel each other, so that there is an advantage that plastic deformation of the support bracket 8 can be effectively prevented.

  In the fourth embodiment, the lower end of the inclined portion 36 provided on the first leg portion 10 acts in the direction β in which the stopper 7 supported by the support bracket 8 is moved to the rear lower side of the shroud upper 1. Since it is arranged on the front side of the vehicle body with respect to the line of action of the load to be applied, a collision accident such as a pedestrian's head colliding with the hood 5 occurs, and a certain value or more in the direction β tilted rearwardly downward from the upper front side 15 is applied to the support bracket 8, the moments M3 and M4 are applied in the directions in which the inclined portion 36 of the first leg portion 10 and the inclined portion 12 of the second leg portion 13 are laid down as shown in FIG. Will work. Therefore, the first leg 10 of the support bracket 8 is tilted to the rear side of the shroud upper 1 and the second leg 13 is tilted on the shroud upper 1 in accordance with the load acting when the collision accident occurs. By plastically deforming and moving the support portion of the stopper 7 rearward and downward, the hood 5 is displaced downward correspondingly to absorb the impact energy and applied to the pedestrian's head or the like. There is an advantage that the impact can be effectively reduced.

  And by providing the recessed part 38 which has a back-falling inclined surface between the upper surface part and back surface part of the shroud doorper 1 to which the support bracket 8 is attached as mentioned above, ie, the upper surface rear end part of the shroud doorper 1, When the support bracket 8 is deformed in response to the load in the direction β tilted from the diagonally forward upper side to the rearward downward input to the stopper 7, as shown in FIGS. 16 and 17, the stopper supported by the support bracket 8. 7 is allowed to move rearward from the rear surface of the shroud upper 1, the stopper 7 can be connected to the shroud upper 1 when a collision accident occurs without increasing the front and rear dimensions of the recess 38. Can be prevented. Accordingly, the stopper 7 supported by the support bracket 8 is moved to the rear lower side of the shroud upper 1, and the hood 5 is greatly displaced downward correspondingly to thereby sufficiently absorb the impact energy. There is an advantage that the impact applied to the pedestrian's head and the like can be effectively mitigated.

For example, a hood inner panel 2 1 disposed below the hood 5, when the stopper 7 is sandwiched between a vehicle body side member comprising a shroud upper 1, as shown by the phantom line B in FIG. 18 Further, the impact energy input to the stopper 7 and the support bracket 8 from the time t0 when the accident of the pedestrian's head colliding with the upper surface of the hood 5 to the time ta when the stopper 7 is caught is generated. Rises at a substantially constant rate, and after the time ta when the pinching occurs, the stopper 7 prevents the hood 5 from being deformed and the impact energy rises rapidly. It is inevitable that the impact applied to is extremely large.

  On the other hand, in the fourth embodiment, as indicated by a solid line F in FIG. 18, after the predetermined load is input to the support bracket 8, the support bracket 8 is plastically deformed to gradually absorb the impact energy. Since the stopper 7 supported by the support bracket 8 is configured to move to the lower rear side of the shroud upper 1, the hood 5 is gradually moved until the time t2 when the hood 5 contacts the upper surface of the shroud upper 1. The impact energy is sufficiently absorbed by being lowered, and the impact applied to the pedestrian's head or the like can be effectively reduced by using the hood 5 as a cushioning material.

  Further, as shown in the fourth embodiment, when a vertical portion 37 having a predetermined length is provided above the inclined portion 36 provided on the first leg portion 10 of the support bracket 8, an input is made to the stopper 7. The high-rigidity portion that effectively prevents the upper portion of the first leg portion 10 from being deformed in response to the load in the direction β inclined downward from the upper front side is formed by the vertical portion 37. Become. Therefore, when a collision accident such as a pedestrian's head hitting the hood 5 occurs and the support bracket 8 is deformed, the stopper 7 supported by the support bracket 8 is used as the first leg 10 of the support bracket 8. Can be smoothly moved to the rear lower side of the shroud upper 1 without contacting the shroud.

  In addition, a retreating space for the stopper 7 formed of the concave portion 38 formed on the inclined surface whose bottom surface is rearwardly lowered is provided between the upper surface portion and the rear surface portion of the shroud upper located in the installation portion of the support bracket 8. Instead of the fourth embodiment, as shown in the fifth embodiment shown in FIGS. 19 and 20, the stopper 7 has a width dimension larger than that of the support bracket 8 and is provided between the upper surface portion and the rear surface portion of the shroud upper 1. It is good also as a structure which provided the evacuation space which consists of recessed parts 39, such as trapezoid shape which can accommodate this. In the fifth embodiment, the first leg portion 10 of the support bracket 8 is configured to extend in the vertical direction along the rear wall portion 27 of the shroud upper 1, and the mounting bolt 9 is attached to the first leg portion 10. And a narrow groove portion that connects the upper edge portion of the insertion hole 40 and the rear end portion of the support hole 17 of the stopper 7 provided in the top plate portion 11 of the support bracket 8. The slit 41 which consists of is formed.

  In the fifth embodiment, since a retreat space including a trapezoidal concave portion 39 that can accommodate the stopper 7 is provided between the upper surface portion and the rear surface portion of the shroud upper 1, the pedestrian's head is placed on the hood 5. When a collision accident such as a collision occurs and a load greater than a certain load in the direction β inclined obliquely downward from the upper front is input to the stopper 7, the stopper 7 moves to the lower rear. 21 and FIG. 22, the stopper 7 is sandwiched between the hood 5 and the shroud upper 1 by accommodating the stopper 7 in a retreat space (recessed portion 39) provided at the rear upper surface of the shroud upper 1. This has the advantage of effectively preventing the situation.

  In the fifth embodiment, the front-rear dimension L1 of the recess 39 provided in the shroud upper 1 is set to a value smaller than the total length L2 of the stopper 7 so that the front end of the stopper 7 is connected to the rear wall of the shroud upper 1. A part of the stopper 7 is accommodated in the concave portion 39 in a state of projecting to the rear side of the vehicle body from the portion 27. According to this configuration, while preventing a large concave portion from being formed in the shroud upper 1, the stopper 7 detached from the bracket 8 using the rear space effectively is accommodated in the concave portion 39. There is an advantage that the stopper 7 can be prevented from scattering.

Furthermore, as shown in the fifth embodiment, an insertion hole 40 for the mounting bolt 9 is formed in the first leg portion 10 installed so as to extend in the vertical direction along the rear wall portion 27 of the shroud upper 1. When the slit 41 formed of a narrow groove portion connecting the upper edge portion of the insertion hole 40 and the rear end portion of the support hole 17 of the stopper 7 provided in the top plate portion 11 of the support bracket 8 is provided. As shown by a solid line G in FIG. 23, a load of a certain value or more is inputted in a direction β inclined obliquely from the upper front side to the rear side due to a collision accident such as a pedestrian's head hitting the hood 5. after gradually absorb impact energy at the time t1 the support bracket 8 by plastically deforming the upper kiss slit 41 and supported by the screw shaft of the mounting bolt 13 holes 1 7 is widened stopper 7 from the support hole 1 7 At the time of withdrawal By greatly displacing the hood 5 downward at t51, it is possible to sufficiently absorb the impact energy before the hood 5 comes into contact with the shroud upper 1 while suppressing the peak load as compared with the conventional case. The impact applied to the pedestrian's head and the like can be effectively mitigated by sufficiently securing the above.

Further, the fourth, the fifth embodiment, provided with a support bracket 8 for supporting the stopper 7 on the upper surface of the shroud upper 1, the rear end portion of the upper surface of the shroud upper 1, greater width dimension than the support bracket 8 And the recesses 38 and 39 having a depth larger than the thickness of the support bracket 8 are provided, so that a collision accident such as a pedestrian's head colliding with the hood 5 occurs as described above, When a load of a certain value or more is input to the stopper 7 in the direction β inclined downward from the rear, the support bracket 8 can be prevented from being sandwiched between the hood 5 and the shroud upper 1. Therefore, without causing a situation that the peak load due to be sandwiched between the supporting bracket 8 and the shroud upper 1 with full over de 5 increases rapidly and appropriately deforming the first leg 10 By moving the stopper 7 diagonally backward and downward, there is an advantage that a sufficient downward stroke of the hood 5 can be secured and the impact applied to the pedestrian's head and the like can be effectively mitigated.

  A concave portion having a depth larger than the thickness of the support bracket 8 deformed in response to the load in the direction β input from the diagonally forward upper side to the stopper 7 is provided in the upper surface portion of the shroud door 1 and the concave portion Alternatively, the support bracket 8 may be provided. In such a configuration, the support bracket 8 deformed at the time of the collision accident is accommodated in the recess so that the support bracket 8 can be easily sandwiched between the hood 5 and the shroud upper 1. There is an advantage that the impact applied to the pedestrian or the like can be effectively mitigated by effectively preventing and deforming the support bracket 8 by the configuration.

  In the first to fifth embodiments, the retreat space for the stopper 7 is configured by the recesses 28, 38, and 39 having the partition wall that hermetically shields the space between the upper space and the lower space of the shroud upper. A collision such as a pedestrian's head colliding with the hood 5 occurs without causing a problem such that the hot air is introduced into the radiator installation portion from above the shroud upper 1 to reduce the cooling performance of the radiator. When a load of a certain value or more is input to the stopper means obliquely from the upper front side, the impact applied to the pedestrian's head and the like by preventing the stopper means from being sandwiched between the hood 5 and the shroud upper 1 There is an advantage that can be effectively mitigated.

  In addition, while forming a notch between the upper surface part and back surface part of the shroud doorper 1, the L-shaped partition plate which shields between the upper space and lower space of a shroud doorper airtightly in this notch part Can be made into a structure in which a retreat space consisting of a recess capable of accommodating the stopper 7 is formed in the rear part of the upper surface of the shroud upper 1 or the like. In this case, the structure of the shroud upper 1 is complicated. Therefore, as described above, it is desirable to configure the retreat space for the stopper 7 by providing the recesses 28, 38, 39 provided with the partition walls that hermetically shield the space between the upper space and the lower space of the shroud upper.

It is a perspective view which shows the front vehicle body structure provided with the food | hood stopper structure of the motor vehicle based on this invention. 1 is an exploded perspective view showing a first embodiment of a hood stopper structure for an automobile according to the present invention. It is side surface sectional drawing which shows the closed state of a hood. It is a perspective view which shows the state where the pedestrian got on the food | hood of a motor vehicle. It is side surface sectional drawing which shows the deformation | transformation state of a support bracket. It is a graph which shows the change state of the load inputted into a support bracket from a hood. It is a disassembled perspective view which shows 2nd Embodiment of the food | hood stopper structure of the motor vehicle based on this invention. It is a graph which shows the change state of the load inputted into the support bracket of a 2nd embodiment. It is a perspective view which shows 3rd Embodiment of the food | hood stopper structure of the motor vehicle based on this invention. It is a graph which shows the change state of the load inputted into the support bracket of a 3rd embodiment. It is sectional drawing which shows the state before a load is input into a support bracket in 3rd Embodiment. It is sectional drawing which shows the state after a load is input into the support bracket in 3rd Embodiment. It is a perspective view which shows 4th Embodiment of the food | hood stopper structure of the motor vehicle based on this invention. It is side surface sectional drawing which shows the action state of the load at the time of hood closing. It is side surface sectional drawing which shows the action state of the load at the time of the occurrence of a collision accident. It is a perspective view which shows the deformation | transformation state of a support bracket in 4th Embodiment. It is side surface sectional drawing which shows the deformation | transformation state of a support bracket in 4th Embodiment. It is a graph which shows the change state of the load inputted into the support bracket of a 4th embodiment. It is a disassembled perspective view which shows 5th Embodiment of the food | hood stopper structure of the motor vehicle based on this invention. It is side surface sectional drawing which shows the action state of the load input into a stopper from a hood. It is a perspective view which shows the deformation | transformation state of a support bracket in 5th Embodiment. It is side surface sectional drawing which shows the deformation | transformation state of a support bracket in 5th Embodiment. It is a graph which shows the change state of the load inputted into the support bracket of a 5th embodiment.

Explanation of symbols

1 shroud upper 5 hood 8 support bracket 17 support hole (support part)
28, 38, 39 Recess (retraction space)

Claims (4)

In a vehicle hood stopper structure in which a stopper means that functions as a cushioning material when the hood provided at the front of the vehicle body is closed is provided between the hood and the shroud upper, a load in a substantially vertical direction is applied when the hood is closed. The stopper means includes a support portion that supports the stopper, and a displacement portion that can be displaced rearward and downward in accordance with a load that is input to the stopper from an obliquely upper front side. a support bracket provided, said stopper means is provided on the upper surface of the retraction space shroud upper for avoiding interference with the stopper means when displaced downward, and the retraction space, the support bracket rear Arranged at a position where the support bracket can be prevented from being caught between the hood and the shroud upper when moving downward Automobile hood stopper structure, characterized in that it has been. And has a stopper made of elastic material, in the automobile hood stopper structure provided between the stopper means food and shroud upper to function as a buffer material upon closure of the hood provided in the front portion of the vehicle body, the stopper The means is supported by the shroud upper so that it can be displaced downward, and a retracting space is provided on the upper surface of the shroud door for avoiding interference with the stopper when the stopper means is displaced downward. Is provided between the upper surface portion and the rear surface portion of the shroud doorper with the front end positioned on the rear side of the vehicle body relative to the front end of the stopper, and the stopper is displaced rearwardly from the rear surface portion of the shroud upper. Food stopper structure automobile comprising the recess to allow the. In the hood stopper structure of an automobile having a stopper made of an elastic body and a stopper means functioning as a cushioning material when the hood provided at the front part of the vehicle body is closed, is provided between the hood and the shroud upper. Is supported by the shroud upper so that it can be displaced downward, and a retracting space is provided on the upper surface of the shroud upper for avoiding interference with the stopper when the stopper means is displaced downward. The front end of the shroud door is provided between the upper surface and the rear surface of the shroud door with the front end positioned on the rear side of the vehicle body, and the front and rear dimensions of the retraction space are smaller than the total length of the stopper. automobile hood stopper structure characterized in that set. The said evacuation space was comprised by the recessed part provided with the partition which shields airtightly between the upper space and lower space of a shroud upper, The automobile of any one of Claims 1-3 characterized by the above-mentioned. Hood stopper structure.

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