JP4645135B2 - Automotive hood stopper structure - Google Patents

Description

  The present invention relates to an automobile hood stopper structure in which a stopper 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 a 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 closing the hood, it is possible to absorb impact energy that acts when the hood is closed by elastically deforming the hood damper. When a collision accident such as a collision occurs, the shock applied to the pedestrian's head or the like can be moderated to some extent by deforming the buffer portion and absorbing impact energy.

  However, if the stopper supported by the support bracket is sandwiched between the hood and the vehicle body side member even if the support bracket serving as the buffer is deformed when the accident occurs, the hood There is a problem that it is difficult to effectively absorb the impact energy acting on the water. 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 absorbs impact energy that acts when the hood is closed by elastically deforming a stopper having a function as a cushioning material when the hood is closed. In the event of a collision accident such as a pedestrian's head hitting the hood, the pedestrian's head can be removed without causing the stopper to be caught between the hood and the vehicle body side member. An object of the present invention is to provide an automobile hood stopper structure capable of effectively mitigating an impact applied to a portion or the like.

Invention according to claim 1, in an automobile hood stopper structure provided between the stopper which functions as a buffer material upon closure of the hood provided in the front portion of the vehicle body and the hood and the vehicle body member, the stopper is fitted A support bracket having a support portion of a stopper including a support hole to be attached is provided in the vehicle body side member, a first slit communicating with the support hole of the stopper is provided in the support bracket, and a load of a certain value or more acts on the stopper. A disengagement promoting means comprising a rod-like member that enters the first slit and widens the first slit, thereby expanding and deforming the support hole to promote disengagement of the stopper from the support portion. It is provided on the vehicle body side member .

The invention according to claim 2 is the vehicle hood stopper structure according to the claim 1, provided with a second slit communicating with the support hole of the stopper in a position opposite the installation portion of the first slit to the support bracket Is.

According to a third aspect of the present invention, in the hood stopper structure for an automobile according to the first or second aspect , the support bracket is provided between the first slit provided in the support bracket and the rod-shaped member provided in the vehicle body side member. The bar is provided with an entry restricting means for restricting the rod-like member from entering the first slit until the load inputted to the input reaches a certain value or more.

According to a fourth aspect of the present invention, in the automobile hood stopper structure according to any one of the first to third aspects, the groove width increases as the first slit provided in the support bracket approaches the stopper support hole. This is provided with a widening promoting portion in which is reduced.

The invention according to claim 5 is the automobile hood stopper structure according to any one of claims 1 to 4 , wherein the support bracket is provided with an insertion portion through which the rod-shaped member is inserted, and the first slit is installed. The support bracket is provided with a third slit that communicates with the insertion portion of the rod-shaped member at a position opposite to the portion.
It is.

Invention is the automobile hood stopper structure according to the claim 1, in the support bracket, and the stopper support hole to be fitted, is inserted rod-like member provided on the vehicle body side member according to claim 6 And an entry restricting means for forming a plurality of first slits between the support hole of the stopper and the insertion part of the rod-shaped member, and regulating movement of the rod-shaped member between the first slits. When the load exceeding a certain value is applied to the stopper, the restriction state of the rod-like member by the entry restricting means is released, and the rod-like member is sequentially advanced into the plurality of first slits, thereby One slit and the support hole are configured to be widened.

  According to the first aspect of the invention, when the hood is closed, the stopper energy functioning as a cushioning material can be elastically deformed to absorb impact energy that acts when the hood is closed, In the event of a collision accident such as a pedestrian's head colliding with the pedestrian, the stopper is securely removed from the support bracket with an appropriate separation load, so that the stopper is sandwiched between the hood and the vehicle body side member. Therefore, there is an advantage that the impact applied to the pedestrian's head or the like can be effectively mitigated.

  According to the second aspect of the present invention, when a load of a certain value or more is applied to the stopper fitted in the support hole provided in the support bracket, the mounting bolt is adjusted according to the load input to the support bracket. A stopper is effectively separated from the support hole with a simple structure by causing a rod-shaped member made of a screw shaft or the like to enter the first slit and widening the first slit to expand and deform the support hole. Can be made.

  According to the invention of claim 3, since the second slit communicating with the support hole of the stopper is provided in the support bracket at a position opposite to the first slit installation portion provided in the support bracket, the support bracket When the rod-shaped member enters the first slit due to a load exceeding a certain value, the support hole of the stopper of the support bracket is easily expanded and deformed starting from the second slit. The stopper can be more reliably detached from the support hole.

  According to the fourth aspect of the invention, when closing the hood, the load that is input to the support bracket is supported by the entry restricting means to prevent the rod-like member from entering the first slit. The impact energy when the hood is closed can be absorbed effectively by the stopper, and a collision accident such as a pedestrian's head hitting the hood occurs, and the load exceeding a certain value is applied to the support bracket that supports the stopper. Is input, the rod-shaped member breaks through the installation portion of the entry restricting means, so that the rod-shaped member can be accurately entered at an appropriate time and the stopper can be reliably removed from the support hole. There are advantages.

  According to the invention which concerns on Claim 5, when the load beyond a fixed value is input into the support bracket which supports a stopper, when a rod-shaped member enters into a widening promotion part, this widening promotion part is used as a guide part. The stopper can be effectively separated from the support hole by allowing the rod-shaped member to enter the first slit.

  According to the invention of claim 6, since the third slit communicating with the insertion hole of the rod-shaped member is provided in the support bracket, a load of a certain value or more is input to the support bracket, and the rod-shaped member is inserted into the first slit. At this point, the first slit is easily widened to cause the support hole of the stopper to be expanded and deformed, so that the stopper can be more effectively detached from the support hole.

  According to the seventh aspect of the present invention, the support bracket is provided with a support hole into which the stopper is fitted, and an insertion portion through which the rod-shaped member provided in the vehicle body side member is inserted, and the support hole of the stopper and the rod shape Since a plurality of first slits are formed between the insertion portions of the members and an entry restricting means for restricting the movement of the rod-shaped member is disposed between the first slits, a load of a certain value or more is applied to the stopper. Advantages of being able to surely remove the stopper from the support hole by sequentially entering the plurality of first slits into the plurality of first slits at a more appropriate time by, for example, breaking through the entry restricting means when acting. There is.

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 is surrounded by an engine room 4 surrounded by a shroud upper 1 provided at a front portion thereof, a front fender panel 2 provided at both left and right side portions, and a dash panel 3 provided at a rear portion. A hood 5 is provided for opening and closing the upper end opening.

  The hood 5 is swung with a 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 to close 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. A hood lock (not shown) that holds 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 a stopper that functions as a buffer when the hood 5 is closed. 7 are provided at four locations on the shroud upper 1.

  The stopper 7 is formed of a cylindrical body formed of a synthetic rubber material or the like, and is configured to be supported by a support bracket 8 attached to the shroud upper 1 as shown in FIGS. The support bracket 8 includes a bracket portion 10 that is fastened to the upper surface of the front side portion of the shroud upper 1 by a mounting bolt 9, and a standing wall portion 11 that rises in a state of being inclined rearward from the rear end portion of the bracket portion 10. The top plate portion 12 extends rearward from the upper end portion of the upright wall portion 11 and extends downward from the rear end portion of the top plate portion 12, and the lower portion is fastened to the rear wall surface of the shroud door 1 by the mounting bolt 13. And a rear wall 14 to be worn.

  The support bracket 8 is formed with an insertion hole 9a for the mounting bolt 9 in the bracket portion 10 and an insertion hole 15 through which the mounting bolt 13 is inserted in the lower portion of the rear wall portion 14, and a stopper. 7 is formed in the top plate portion 12. Further, the top plate portion 12 and the rear wall portion 14 of the support bracket 8 have a first slit 18 formed of a narrow groove portion that allows the rear edge portion of the support hole 16 to communicate with the upper edge portion of the insertion hole 15. Is formed. Further, the top plate portion 12 of the support bracket 8 is formed with a second slit 19 formed of a U-shaped notch communicating with the front edge portion of the support hole 16.

  The peripheral edge of the support hole 16 of the stopper 7 is formed in a spiral shape, and a male thread-like protrusion 20 that is screwed into and fitted into the support hole 16 is formed in the lower part of the stopper 7. Yes. The stopper 7 supported by the support bracket 8 is disposed so as to contact the hood inner panel 21 provided on the lower surface of the hood 5. When the hood 5 is closed, a load in a substantially vertical direction acts on the stopper 7 as shown by an arrow α in FIG. 3, and the stopper 7 is elastically deformed according to the load, thereby functioning as a cushioning material. And the function of restricting the vibration of the front end portion of the hood 5 held in the closed state is exhibited.

  On the upper surface of the rear end portion of the shroud upper 1, a recess 22 having a larger width dimension than the support bracket 8 and having a rearwardly inclined surface is provided in the installation portion of the support bracket 8. When the hood 5 is closed, the support bracket 8 is not deformed according to the load acting on the stopper 7 and a load larger than the load acting on the hood 5 is input to the support bracket 8. In this case, as shown in FIGS. 4 and 5, the upright wall portion 11 of the support bracket 8 falls on the shroud upper 1, and the top plate portion 12 and the rear wall portion of the support bracket 8 corresponding thereto. The strength of the support bracket 8 is set so that 14 is displaced to the rear side of the shroud upper 1.

  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. Input from the hood 5 to the stopper 7 supported by the support bracket 8. When the hood 5 is closed, for example, when a load of 1.4 kN acts on the stopper 7 and a corresponding load is input to the support bracket 8, the upright wall portion 11, the top plate portion 12, and The rigidity is set so that none of the rear wall portions 14 is plastically deformed.

  In contrast to this, when a pedestrian collides with the front surface of the vehicle body during the driving of the automobile and a collision accident occurs such as the pedestrian falls on the hood 5 as shown in FIG. 6, the arrow β in FIG. As shown in the figure, the lower surface of the hood inner panel 21 provided below the hood 5 abuts against the stopper 7, so that the load in the direction inclined rearward is applied to the stopper 7 supported by the support bracket 8 from the hood 5. Works. When a collision accident occurs, a load larger than the load at the time of closing the hood, for example, a load of 2.0 kN or more acts on the stopper 7, and if a corresponding load is input to the support bracket 8, The upright wall portion 11 of the support bracket 8 that rises in an upwardly inclined state is plastically deformed so as to fall on the shroud upper 1, and the top plate portion 12 of the support bracket 8 moves to the rear side of the vehicle body correspondingly. The rigidity is set so as to.

  Further, when the collision accident occurs, the rear wall portion 14 of the support bracket 8 fastened to the rear surface of the shroud upper 1 is pushed down by the mounting bolt 13 according to the load acting in the direction of arrow β in FIG. As shown in FIG. 4, the screw shaft of the mounting bolt 13 enters the first slit 18 of the support bracket 8 to widen the first slit 18. Then, as the first slit 18 is widened, the support hole 16 of the stopper 7 provided in the top plate portion 12 is expanded and deformed left and right, and the expansion deformation of the support hole 16 is The stopper 7 is easily separated from the support hole 16 by being promoted by the presence of the two slits 19. That is, when a load of a certain value or more is applied to the stopper 7 supported by the support bracket 8, a detachment promoting means that promotes the detachment of the stopper 7 from the support hole 16 provided in the support bracket 8, A first slit 18 provided in the support bracket 8, a rod-shaped member made of a screw shaft of the mounting bolt 13, and the second slit 19 are configured.

  In the automobile hood stopper structure in which the stopper 7 functioning as a cushioning material when the hood 5 provided at the front portion of the vehicle body is closed as described above is provided between the hood 5 and the vehicle body side member made of the shroud upper 1. When a support bracket 8 having a support portion composed of the support hole 16 of the stopper 7 is provided on the vehicle body side member (shrouded upper 1), and a load of a certain value or more is applied to the stopper 7 supported by the support bracket 8 Since the disengagement promoting means for facilitating the disengagement of the stopper 7 from the support hole 16 provided in the support bracket 8 is provided, the stopper 7 having a function as a cushioning material is elastically deformed when the hood 5 is closed. Thus, it is possible to absorb the impact energy that acts when the hood 5 is closed, and the pedestrian's head on the hood 5. When a collision accident such as a collision occurs, the impact applied to the head of the pedestrian can be effectively mitigated without causing a situation where the stopper 7 is caught between the hood 5 and the vehicle body side member. There is an advantage.

  That is, by setting the strength so that the support bracket 8 does not deform depending on the load acting when the hood 5 is closed, the stopper 7 having the function as the buffer material is elastically deformed. The impact energy acting when the hood 5 is closed can be absorbed. Then, the front end of the vehicle collides with the pedestrian's head, and as shown in FIG. 6, a collision accident occurs such as the pedestrian's head collides with the upper surface of the hood 5. When a larger load is input to the support bracket 8, the screw shaft of the mounting bolt 13 enters the first slit 18 of the support bracket 8 to expand the support portion of the stopper 7 including the support hole 16. By deforming, the stopper 7 can be reliably detached from the support portion. Therefore, as shown in Patent Document 1, the stopper 7 is disposed between the hood 5 and the vehicle body side member without taking a means such as forming an escape hole in which the lower portion of the stopper is reliably dropped on the vehicle body side member. While being able to effectively prevent the pinching, the hood 5 can be sufficiently deformed to absorb the impact energy by reliably removing the stopper 7 from the support hole 16 provided in the support bracket 8. This has the advantage that 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 inner panel 21 disposed below the hood 5 and the vehicle body side member made of the shroud upper 1, as shown by an imaginary line A in FIG. The impact energy input to the stopper 7 and the support bracket 8 from the time point t0 when the head of the pedestrian collides with the upper surface of the hood 5 to the time point ta when the stopper 7 is caught. 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 first embodiment, as indicated by a solid line B in FIG. 7, 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 is separated from the support hole 16 provided in the support bracket 8, the hood 5 is gradually deformed after the hood 5 is largely displaced downward at the time t2 when the stopper 7 is detached. As a result, 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 prior art, and to sufficiently secure the descending stroke of the hood 5. The impact applied to the head or the like can be effectively mitigated.

  In particular, as shown in the first embodiment, a support hole 16 in which the stopper 7 is fitted as a support portion of the stopper 7 is provided in the support bracket 8, and the stopper 7 is supported as a means for promoting the removal of the stopper 7. A first slit 18 communicating with the hole 16 is provided in the support bracket 8, and enters the first slit 18 according to the load input to the support bracket 8 when a load of a certain value or more is applied to the stopper 7. When a rod-like member composed of a screw shaft of the mounting bolt 13 is provided on the vehicle body side member and the first slit 18 is widened by the screw shaft and the support hole 16 is expanded and deformed, the structure is simple. The stopper 7 can be effectively detached from the support hole 16 in response to a load greater than a certain value acting on the stopper 7 supported by the support bracket 8. There is an advantage to say.

  In the first embodiment, the second slit (U) communicated with the support hole 16 of the stopper 7 at a position opposite to the installation portion of the first slit 18 provided on the support bracket 8 (front end side). When the support bracket 8 is provided with a load of a predetermined value or more and a screw shaft of the mounting bolt 13 enters the first slit 18 of the support bracket 8. Thus, by easily expanding and deforming the support portion of the stopper 7 composed of the support hole 16 with the second slit 19 as a starting point, the stopper 7 can be more reliably detached from the support portion.

  Further, in the first embodiment, since the recess 22 having the inclined surface that is rearwardly lowered is provided on the upper surface of the rear end portion of the shroud upper 1, when a load greater than a certain value acts on the support bracket 8, FIG. 4 and FIG. As shown in FIG. 5, the top plate portion 12 and the rear wall portion 14 of the support bracket 8 can be displaced to the rear side of the vehicle body without being obstructed by the upper wall surface of the shroud upper 1. The stopper 7 can be easily detached from the support hole 16 by bringing the bottom of the stopper 7 fitted into the stopper 16 into contact with the inclined surface. Therefore, there is an advantage that it is possible to more effectively prevent the occurrence of the situation where the stopper 7 is sandwiched between the hood 5 and the vehicle body side member.

  FIG. 8 shows a space between the first slit 18 provided in the support bracket 8 and a rod-like member (screw shaft of the mounting bolt 13) provided on the vehicle body side member by being screwed to the rear surface of the shroud upper 1. In addition, the first slit 18 is located in the vicinity of an insertion portion comprising an insertion hole 15 through which the screw shaft of the mounting bolt 13 is inserted, that is, an entry restricting means for restricting the rod-like member from entering the first slit 18. A book configured to restrict the rod-like member from entering the first slit 18 until the load input to the support bracket 8 becomes a predetermined value or more by providing the closing portion 23 that closes the opening. 2 shows a second embodiment of the invention.

  In the second embodiment, the stopper 7 is prevented from being detached from the support hole 16 when the hood 5 is closed, so that the impact energy acting when the hood 5 is closed can be effectively absorbed, and the hood 5 When a collision accident occurs such as a pedestrian's head hitting the top, the impact applied to the pedestrian's head or the like by removing the stopper 7 from the support hole 16 provided in the support bracket 8 at an appropriate time. There is an advantage that energy can be effectively reduced.

  That is, the load input to the support bracket 8 when the hood 5 is closed is supported by the entry restricting means composed of the closing portion 23, so that the rod-shaped member composed of the screw shaft of the mounting bolt 13 in the first slit 18. 7, the stopper 7 is kept supported by the support bracket 8 until a load equal to or greater than a certain value is input to the support bracket 8 as indicated by a broken line C in FIG. The stopper 7 can effectively absorb the impact energy when the hood is closed.

  On the other hand, when a collision such as a pedestrian's head hits the hood 5 and a load of a certain value or more is input to the support bracket 8 that supports the stopper 7, as shown in FIG. Then, the stopper 23 is broken from the support hole 16 provided in the support bracket 8 by causing the rod-like member made of the screw shaft of the mounting bolt 13 to enter the first slit 18 by breaking the closure portion 23 or the like. Can be removed with certainty. Therefore, there is an advantage that the separation load of the stopper 7 can be set to an appropriate value by setting the strength of the blocking portion 23 to an appropriate value.

Incidentally, instead of the penetration restricting device having upper Ki閉 covering section 23, a separate coating plate which covers the one slit formed in the support bracket 8 partially provided in the attachment bolt 9 by the coated plates restricts the movement of the rod-like member made of a screw shaft, or to restrict the movement of the rod-like member by the width of the slit partially reduced or the like to the thickness of the side portion of the slit partially increased You may comprise.

  Moreover, in the said 2nd Embodiment, as the base end part of the 1st slit 18 provided in the support bracket 8, ie, the position close | similar to the insertion hole 15 of the said mounting bolt 13, it approaches the support hole 16 of the stopper 7. As shown in FIG. Since the tapered widening promoting portion 24 in which the groove width decreases is provided, as shown by a broken line C in FIG. 7, a load of a certain value or more is input to the support bracket 8 and the closing portion 23 is broken. At the time point tb, the rod-shaped member made of the screw shaft of the mounting bolt 13 is caused to smoothly enter the first slit 18 by using the widening promoting portion 24 as a guide portion, thereby the first slit 18 and the stopper 7. The stopper 7 can be reliably detached from the support hole 16 by effectively expanding and deforming the support hole 16.

  Further, in the second embodiment shown in FIG. 8 and FIG. 9, the rod-shaped member made of the screw shaft of the mounting bolt 13 is located at the position opposite to the installation portion of the first slit 18, that is, below the rear wall portion 14. When the support bracket 8 is provided with the third slit 25 that communicates with the insertion portion including the insertion hole 15, when a load of a certain value or more is input to the support bracket 8 and the rod-shaped member enters the first slit 18. Thus, the rear wall portion 14 of the support bracket 8 and the first slit 18 can be easily widened. Therefore, when a load of a certain value or more is input to the support bracket 8, the first slit 18 is expanded more quickly, and the support hole 16 of the stopper 7 is expanded and deformed. Can be separated more effectively.

  As described above, the rod-shaped member made of the screw shaft of the mounting bolt 13 is caused to enter the first slit 18 to widen the first slit 18 and cause the support hole 16 of the stopper 7 to be expanded and deformed. Instead of the first and second embodiments configured as described above, as in the third embodiment shown in FIG. 10, a rod-shaped member made of a triangular prism-shaped wedge body 13a is provided on the rear surface of the shroud upper 1 that is a vehicle body side member. When a load of a certain value or more is input to the support bracket 8 that protrudes and supports the stopper 7, a rod-shaped member made of the wedge body 13a enters the first slit 18 of the support bracket 8, The top plate portion 12 and the rear wall portion 14 of the support bracket 8 may be configured to be expanded and deformed.

FIGS. 11-13 has shown 4th Embodiment of the hood stopper structure of the motor vehicle based on this invention. In the fourth embodiment, the rear wall portion 14 of the support bracket 8 is lowered rearward along the input direction β of the load acting when a collision accident such as a pedestrian's head hitting the hood 5 occurs. The rear wall surface 1a of the shroud upper 1 is inclined and installed at an angle corresponding to the inclination. Then, the wall portion 14 after the support bracket 8, communicates with the first slit 18a of the upper side which communicates with the supporting hole 16 of the stopper 7 formed in the top wall 12, the insertion hole 15 of the mounting bolt 1 3 The lower first slit 18b is formed, and reinforcing flange portions 26 are provided on the left and right sides of the rear wall portion 14.

  Further, between the first slits 18a provided in the support bracket 8, a closing portion 27 serving as an entry restricting means for restricting the movement of the rod-shaped member serving as the screw shaft of the mounting bolt 13 is formed. At the upper end of the first slit 18b, a tapered widening promoting portion 28 is provided in which the groove width decreases as it approaches the support hole 16 of the stopper 7 provided in the top plate portion 12 of the support bracket 8. . Further, a concave portion 29 serving as a receiving portion for the stopper 7 detached from the support hole 16 is provided in the upper portion of the rear end portion of the shroud upper 1 in the installation portion of the support bracket 8.

  As described above, the support hole 16 into which the stopper 7 is fitted into the support bracket 8 and the insertion hole 15 through which the rod-shaped member (screw shaft of the mounting bolt 13) provided in the vehicle body side member (shrouded upper 1) is inserted. And a plurality of first slits 18a and 18b are formed between the support hole 16 of the stopper 7 and the insertion hole 15 of the rod-shaped member, and the first slits 18a and 18b An entry restricting means (blocking portion 27) for restricting the movement of the rod-shaped member is provided, and when a load of a predetermined value or more is applied to the stopper 7, the restriction state of the rod-shaped member by the entry restricting means is released to plural In the case where the support hole 16 is widened by sequentially entering the rod-like members into the first slits 18a and 18b, a collision such as a pedestrian's head hits the hood 5 If the late occurs, there is an advantage that the impact energy applied to the head of the pedestrian by reliably disengaged stopper 7 from the support hole 16 can be effectively reduced.

  That is, when a collision accident such as a pedestrian's head hitting the hood 5 occurs, a load larger than the mounting force of the support bracket 8 by the mounting bolt 13 is applied as shown by a solid line D in FIG. At the time t1 when the signal is input to the support bracket 8, a rod-like member made of a screw shaft of the mounting bolt 13 enters the first slit 18a of the support bracket 8, and the rear wall portion of the support bracket 8 is along this rod-like member. After the slide displacement of 14, at a time t <b> 3 when a predetermined load is applied, the closing portion 27 constituting the entry restricting means is broken by the rod-like member. When the closing portion 27 is broken, The impact energy input from the hood 5 can be absorbed to some extent.

Further, after the time point t3 when the closing portion 27 is broken, the rod-shaped member enters the upper first slit 18a from the lower first slit 18b, and the support hole 16 is expanded and deformed. Since the stopper 7 is detached from the support bracket 8, an impact applied to a pedestrian's head or the like by greatly deforming the hood 5 and using the hood 5 as a cushioning material at the time t4 when the stopper 7 is detached. the it is possible to sharply, can be subsequently effectively relieving the impact applied to the head etc. of a pedestrian to effectively absorb the impact energy by deforming the hood 5.

  Further, in the fourth embodiment, the rear wall portion 14 of the support bracket 8 is rearward along the input direction β of the load that acts when a collision accident such as a pedestrian's head hits the hood 5. Since the rear wall surface of the shroud upper 1 is inclined at an angle corresponding to the downward inclination, the rear wall portion 14 of the support bracket 8 extends along the rear wall surface of the shroud upper 1 when the accident occurs. By sliding and displacing downward, the rod-shaped member comprising the screw shaft of the mounting bolt 13 is sequentially advanced from the lower first slit 18b into the upper first slit 18a, thereby effectively widening the support hole 16. Thus, the stopper 7 can be reliably detached from the support bracket 8. In particular, when the reinforcing flange portions 26 are provided on the left and right sides of the rear wall portion 14 as described above, the rear wall portion 14 is deformed when a load greater than a certain value is input to the support bracket 8. As a result, it is possible to effectively prevent a situation in which the rear wall portion 14 of the support bracket 8 cannot be slid downward along the rear wall surface of the shroud upper 1, so that the stopper 7 is supported. The bracket 8 can be detached more reliably.

  On the other hand, when the hood 5 is closed, the hood 5 swings and displaces with a hood hinge 6 provided at the rear end of the hood 5 as a fulcrum, so that the hood 5 moves substantially vertically as shown by an arrow α in FIG. Since the load is input to the stopper 7 and the support bracket 8, a component force in the direction δ that presses the rear wall portion 14 of the support bracket 8 against the rear wall surface 1 a 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 13. There is an advantage that it is possible to effectively prevent the support bracket 8 from being plastically deformed and the mounting position of the support bracket 8 from being displaced. That is, when the load acts in the substantially vertical direction α as described above, the load acting on the closing portion 27 constituting the entry restricting means becomes a large value as shown by the broken line E in FIG. Until the time point t3 ′ when the blocking portion 27 is broken, the rear wall portion 14 of the support bracket 8 is prevented from sliding downward along the rear wall surface 1a of the shroud upper 1, and an impact that acts when the hood 5 is closed. Energy can be absorbed effectively.

  Further, in the fourth embodiment, since the tapered widening promoting portion 28 is provided at the upper end portion of the first slit 18b, when the rod-like member made of the screw shaft of the mounting bolt 13 reaches the widening promoting portion 28. Thus, when the widening promoting portion 28 is pushed and widened by the rod-like member, the closing portion 27 can be appropriately broken. Further, the recess 29 is provided on the upper surface of the rear end portion of the shroud upper 1, and the stopper 7 detached from the support hole 16 provided in the support bracket 8 is accommodated in the recess 29 (see FIG. 13). There is an advantage that it is possible to effectively prevent the stopper 7 from being lost or biting into an auxiliary machine or the like in the engine room.

  As a stopper detachment promoting means, a first slit 18 communicating with the support hole 16 of the stopper 7 is provided in the support bracket 8, and the first slit 18 is provided when a load of a certain value or more is applied to the stopper 7. Instead of the above embodiment in which a rod-like member comprising a screw shaft of the mounting bolt 13 that widens and expands and deforms the support hole 17 is provided on the vehicle body side member, the load is applied to the stopper 7 when a load of a certain value or more is applied. A spring member that forcibly expands and deforms the support hole 16 or an explosive that forcibly removes the stopper 7 from the support hole 17 may be provided.

Further, in each of the above embodiments, the example in which the support bracket 8 is attached to the vehicle body side member including the shroud doorper 1 has been described. However, instead of the shroud upper 1, the structure may be attached to the upper surface of the front fender panel 2 or the like. . Further, as shown in each of the above-described embodiments, an automobile provided with a rear-opening type hood instead of the hood 5 configured to be able to be opened forward by supporting a hood hinge 6 provided at the rear end of the hood 5. The present invention can also be applied to other hood stopper structures.

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 detachment | leave state of a stopper. It is side surface sectional drawing which shows the detachment | leave state of a stopper. It is a perspective view which shows the state where the pedestrian got on the food | hood of a motor vehicle. 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 perspective view which shows the detached state of the stopper in 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 disassembled 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 closed state of the hood in 4th Embodiment. It is side surface sectional drawing which shows the detached state of the stopper in 4th Embodiment. It is a graph which shows the change state of the load inputted into a support bracket from a hood.

Explanation of symbols

1 Shrouded upper (vehicle body side member)
5 Hood 8 Support bracket 13 Mounting bolt (detachment promoting means)
13a Wedge body (bar-shaped member)
15 Insertion hole 16 Support hole (support part)
18 First slit (detachment promoting means)
19 2nd slit 24,28 Widening promotion part 25 3rd slit 26,27 Closure part (entry control means)

Claims (6)

In a hood stopper structure for an automobile in which a stopper that functions as a cushioning material is provided between the hood and the vehicle body side member when the hood provided at the front of the vehicle body is closed, a stopper comprising a support hole in which the stopper is fitted A support bracket having a support portion is provided on the vehicle body side member, a first slit communicating with the support hole of the stopper is provided in the support bracket, and when a load greater than a certain value is applied to the stopper , The vehicle body side member is provided with a disengagement promoting means composed of a rod-shaped member that expands and deforms the support hole by enlarging the first slit and promoting the disengagement of the stopper from the support portion. Features a hood stopper structure for automobiles. 2. The automobile hood stopper structure according to claim 1, wherein the support bracket is provided with a second slit communicating with the support hole of the stopper at a position opposite to the first slit installation portion . Between the first slit provided on the support bracket and the rod-like member provided on the vehicle body side member, the rod-like member enters the first slit until the load input to the support bracket becomes a certain value or more. An automobile hood stopper structure according to claim 1 or 2 , further comprising an entry restricting means for restricting the above. 4. The automobile according to claim 1 , wherein a widening promoting portion is provided in the first slit provided in the support bracket so that the groove width decreases as it approaches the support hole of the stopper . 5. Hood stopper structure. It provided with an insertion portion which rod member is inserted into the support bracket, and wherein the kite is provided a third slit communicating with the insertion portion of the rod-like member at a position opposite the installation portion of the first slit to the support bracket The hood stopper structure for an automobile according to any one of claims 1 to 4 . The support bracket is provided with a support hole into which the stopper is fitted and an insertion portion through which a rod-like member provided in the vehicle body side member is inserted, and a plurality of gaps are provided between the support hole of the stopper and the insertion portion of the rod-like member. The first slit is formed, and an entry restricting means for restricting the movement of the bar-like member is disposed between the first slits, and when the load exceeding a certain value acts on the stopper, the entry restricting means by sequentially enter the rod-shaped member within said plurality of first slit to release the restricted state of the bar-like member, according to claim 1, characterized by being configured so as to widen the first slit and the support hole The automobile hood stopper structure described in 1.

Images