JP2014223884A - Cowl structure for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cowl structure for an automobile, which enables a vertical wall part of a cowl member to be stably buckled in the direction of preventing a buckling direction from being sandwiched between an engine hood and a dash panel, when the vertical wall part of the cowl member is buckled by a load from an upside, input via the engine hood.SOLUTION: A cowl member 1, which is arranged among a lower end of a front window panel 4 of an automobile, a back end of an engine hood 2 and an upper end 3a of a dash panel 3, comprises a seal loading part 1c that is almost horizontally formed, a vertical wall part 1b that is almost vertically formed toward the dash panel 3, and a slope part 1d that is formed like a slope face on an oblique upside. A strength part 5 configured by protruding to the side of the engine hood 2 is formed in a valley part between the seal loading part 1c and the slope part 1d.

Description

  The present invention relates to an automotive cowl structure, and more particularly to an automotive cowl structure that is disposed between a lower end portion of a front wind panel of an automobile, a bonnet, and a dash panel.

  For example, as a cowl structure for an automobile disposed between the lower end portion of the front wind panel of a conventional automobile, the rear end portion of the bonnet, and the upper end portion of the dash panel, the rear end portion of the bonnet is a sealing material. A seal placing portion supported via the seal placement portion, a vertical wall portion formed below the seal placement portion, and a panel placement portion supported by the upper end portion of the dash panel. (Prior Art Document 1) is known as the prior art.

Japanese Patent Laying-Open No. 2005-306086

  However, in the automotive cowl structure disclosed in the prior art document 1, the vertical wall portion buckles due to the load from the upper side inputted through the bonnet and absorbs the impact. Since it has not been determined, if the vertical wall portion of the vertical wall portion buckles forward, the cowl may be sandwiched between the bonnet and the dash panel, which may increase the reaction force.

  In order to solve the above-described problems, the present invention provides a buckling direction sandwiched between the bonnet and the dash panel when the vertical wall portion buckles due to a load from the upper side inputted through the bonnet. The present invention provides an automotive cowl structure that can stably buckle in any direction.

  In order to solve the above-mentioned problems, an automobile cowl structure according to claim 1 of the present invention is arranged between a lower end portion of a front wind panel of an automobile, a rear end portion of a bonnet, and an upper end portion of a dash panel. The cowl member thus formed supports the rear end portion of the bonnet via a seal material and is formed in a substantially horizontal shape, and a substantially vertical shape from the seal placement portion toward the dash panel. It is formed at least by a vertical wall portion formed and a slope portion formed in a slope shape obliquely upward starting from the rear end portion of the seal placement portion, and the seal placement portion and the slope portion The trough is characterized in that a strength part that protrudes toward the bonnet is formed across the trough.

  The cowl structure for an automobile according to claim 2 of the present invention is characterized in that the strength portion according to claim 1 is formed in a box shape by an upper wall, a front wall, and a lateral wall.

  Furthermore, the cowl structure for an automobile according to claim 3 of the present invention is characterized in that the strength portion according to claim 1 is formed in a rib shape.

  According to the present invention, a cowl member disposed between a lower end portion of a front wind panel of an automobile, a rear end portion of a bonnet, and an upper end portion of a dash panel includes the bonnet. A support portion that is supported by a sealing material and is formed in a substantially horizontal shape, a vertical wall portion that is formed in a substantially vertical shape from the seal placement portion toward the dash panel, It is formed at least from a slope portion formed in a slope shape obliquely upward starting from the rear end portion of the seal placement portion, and a valley portion between the seal placement portion and the slope portion is formed on the bonnet side. Since the projecting strength portion is formed across the valley, the seal mounting portion and the slope portion are caused by an impact load applied from the upper side to the lower side of the rear end portion of the bonnet. According to strength part By increasing the strength, the vertical wall portion that becomes the fragile portion buckles in the direction of the impact load, so that the reaction force does not increase and the impact load applied from the upper side to the lower side to the bonnet Deformation occurs at the initial desired level. In other words, the vertical wall portion is not sandwiched between the bonnet and the dash panel, and the impact load applied to the bonnet from the upper side to the lower side can be efficiently absorbed.

  Further, according to the present invention, the strength portion is formed in a box shape by an upper wall, a front wall, and a lateral wall, so that the seal placing portion and the slope portion are However, when the strength is increased by the strength portion, the vertical wall portion becomes a fragile portion, and the vertical wall portion is buckled in the direction of the impact load.

  Further, according to the invention of claim 3, the strength portion is formed in a rib shape, so that the strength of the seal placing portion and the slope portion is increased by the strength portion. There is an effect that the vertical wall portion becomes a fragile portion and the vertical wall portion buckles in the direction of the impact load.

Sectional drawing around the cowl structure of the automobile according to the first embodiment of the present invention. The perspective view of the cowl structure of the motor vehicle of FIG. FIG. 3 is an enlarged explanatory view of a strength portion in FIG. 2. Sectional drawing which shows the state which the load applied to the bonnet of FIG. 1, and the bonnet deform | transformed. Sectional drawing which shows the state which the vertical wall part of the cowl structure after predetermined time progressed from the state shown in FIG. 4 deform | transformed. Sectional drawing which shows the state after the vertical wall part deformation | transformation of the cowl structure after predetermined time progress from the state shown in FIG. The comparative data graph with the conventional example of the reaction force which concerns on Example 1 of this invention, and this invention. FIG. 2 is a perspective view corresponding to FIG. 2 according to a second embodiment of the present invention. FIG. 2 is a perspective view corresponding to FIG. 2 according to a third embodiment of the present invention. FIG. 10 is an enlarged explanatory diagram of the strength portion of FIG. 9.

  Hereinafter, embodiments of the present invention will be described in detail. In the present invention, when the vertical wall portion of the cowl member buckles due to the load from the upper side inputted through the bonnet, the buckling direction can be stably buckled in the direction not sandwiched between the bonnet and the dash panel. In order to achieve the objective of providing a simple automotive cowl structure, there is a cowl member disposed between the lower end of the front wind panel of the automobile, the rear end of the bonnet, and the upper end of the dash panel. A seal mount portion that supports the rear end portion of the bonnet via a seal material and is formed in a substantially horizontal shape, and a vertical wall formed in a substantially vertical shape from the seal mount portion toward the dash panel. And a slope portion formed in a slope shape obliquely upward starting from the rear end portion of the seal placement portion, and the seal placement portion and the slope portion. The valleys, by strength portion formed by projecting the bonnet side is formed straddling the valley, it was realized. Embodiments of the present invention will be described below with reference to the drawings.

  A structure according to Embodiment 1 of the present invention will be described with reference to FIGS. The cowl member 1 of the first embodiment includes a lower end portion of a front wind panel 4 of an automobile, an inner panel 2b at a rear end portion of a bonnet 2 that covers the engine room from the upper side UP, the engine room, and a passenger room (a passenger room). This is a member made of a synthetic resin such as polypropylene, which is disposed between the upper end portion 3a of the dash panel 3 that partitions the space. Reference numeral 2 a in FIG. 1 is an outer panel of the bonnet 2. Similarly, reference numeral 3 b in FIG. 1 is a panel body of the dash panel 3.

  As shown in FIG. 2, the cowl member 1 is elongated in the left and right directions LH and RH, and is integrally formed, and a known inner panel 2b at the end of the rear RR of the bonnet 2 is not shown. A seal placing portion 1c that is supported through a sealing material and is formed in a substantially horizontal shape, a vertical wall portion 1b that is formed in a substantially vertical shape from the seal placement portion 1c toward the dash panel 3, and A slope portion 1d formed in a slope shape obliquely upward starting from the end portion of the rear side RR of the seal placing portion 1c, a front portion 1a riding on the upper side UP of the upper end portion 3a of the dash panel 3, and a front window panel 4 is formed by a groove portion 1e that can store snow, dead leaves, and the like accumulated on 4, and a cover portion 1f that covers the lower end portion of the front window panel 4. The sealing material (not shown) prevents heat and odor from the engine room from leaking out of the engine room.

  Further, in the valley portion formed as shown in FIG. 1 by the seal placing portion 1c and the slope portion 1d, the strength portion 5 protruding to the bonnet 2 side extends over the valley portion and in the horizontal direction. It is formed so that the distance L between LH and RH is 100 millimeters. The strength portion 5 is formed in a box shape by an upper wall 5a, a front wall 5b, and lateral walls 5c and 5c.

  Inner ribs 7 are formed on the lower LWR surface of the inclined surface portion 1d and the groove portion 1e so as to straddle the lower LWR surface of the inclined surface portion 1d and the groove portion 1e at appropriate right and left intervals. It becomes. The inner rib 7 is formed of the first rib 7a on the slope 1d side and the second rib 7b on the groove 1e side, so that the strength is improved.

  As described above, the distance L between the right and left directions LH and RH is 100 millimeters because the strength portion 5 has a diameter of 165 millimeters of the head impactor 8 imitating the head of a pedestrian shown in FIG. Because it is determined by the Ministry of Land, Infrastructure, Transport and Tourism pedestrian head protection standards, it is required to be 82.5 mm or more, which is half of that.

  Next, the operation of the first embodiment will be described.

  A cowl member 1 disposed between a lower end portion of a front wind panel 4 of an automobile, a rear end portion of a bonnet 2 and an upper end portion 9a of a dash panel 3 is provided with a sealing material for the rear end portion of the bonnet 2. And a seal placing portion 1c that is formed in a substantially horizontal shape, a vertical wall portion 1b that is formed in a substantially vertical shape from the seal placement portion 1c toward the dash panel 3, and the seal placement portion. The bonnet 2 is formed in at least a slope portion 1d formed in a slope shape on the oblique upper side UP starting from the rear end portion of the seal portion 1c. Since the strength portion 5 that protrudes to the side is formed across the valley portion, the seal is placed by the impact load F1 applied from the upper side UP to the lower side LWR at the rear end portion of the bonnet 2. 1c and the inclined surface portion 1d are increased in strength by the strength portion 5, so that the vertical wall portion 1b serving as a brittle portion buckles to the rear side RR that is the direction of the impact load F1, thereby increasing the reaction force. First, deformation due to the impact load F1 applied to the bonnet 2 from the upper side UP to the lower side LWR occurs at an initial desired level. That is, the buckling portion 1b ″ ′ of the vertical wall portion 1b moves to the rear side RR so that the vertical wall portion 1b is not sandwiched between the bonnet 2 and the dash panel 3 but from the upper UP to the bonnet 2 to the lower LWR. It is possible to efficiently absorb the impact loads F1 to F3 applied toward the surface, as shown in the graph of FIG. Thus, the peak disappears and the impact loads F1 to F3 can be efficiently absorbed.

  Further, since the strength portion 5 is formed in a box shape by the upper wall 5a, the front wall 5b, and the lateral walls 5c and 5c, the strength of the seal placing portion 1c and the inclined portion 1d is increased by the strength portion 5. As a result, the vertical wall portion 1b becomes a fragile portion and the vertical wall portion 1b is buckled in the direction of the impact load F1.

  Reference numeral 1b ″ shown in FIG. 5 is an upper wall UP above the buckling portion 1b ″ ′, and reference numeral 1b ′ is a lower wall lower LWR from the buckling portion 1b ″ ′. F1 shown, F2 shown in Fig. 5 and F3 shown in Fig. 6 are indicated by different symbols so that the passage of time is easy to understand, but this is a moment when the impact speed is 32 km / h. The impact angle in the head impactor 8 is 65 degrees with respect to the horizontal reference line.

  A structure according to Embodiment 2 of the present invention will be described with reference to FIG. The strength portion 10 of the second embodiment is different from the strength portion 5 of the first embodiment in that the strength portion 10 is long to the left and right. That is, as in the first embodiment, the strength portion 5 is formed continuously from side to side, whereas a plurality of boxes are provided for every 100 millimeters having the dimension l.

  Next, the operation of the second embodiment will be described.

  By forming the strength portion 10 to the left and right continuously, the vertical wall portion 1b of the cowl member 1 is seated on the rear side when a pedestrian or the like receives an impact from the upper UP to the lower LWR on the bonnet 2. By bending, there is an effect that the shock can be absorbed surely.

  A structure according to Embodiment 3 of the present invention will be described with reference to FIGS. The strength portion 11 of the third embodiment is different from the strength portion 5 of the first embodiment in that it is formed in a rib shape. That is, as in the first embodiment, the strength portions 5 are formed at the same 100 millimeter intervals, whereas a plurality of boxes are provided for every 100 millimeters of the dimension L.

  Next, the operation of the third embodiment will be described.

  By forming the rib-shaped strength portion 11, the vertical wall portion 1b of the cowl member 1 is seated on the rear side when a pedestrian or the like receives an impact from the upper UP to the lower LWR on the hood 2. By bending, there is an effect that the shock can be absorbed surely.

  In the first to third embodiments, “pedestrian or the like” is assumed to cause a load to be applied to the bonnet 2 from the upper side UP to the lower side LWR. This “pedestrian etc.” is a concept that includes not only a case where a person is walking on the street but also a state where there is a predetermined speed such as joking, and a case where a subject such as a deer is other than a person. It is also a concept that includes passengers who make full use of two-wheeled vehicles such as bicycles and motorcycles.

DESCRIPTION OF SYMBOLS 1 Cowl member 1b Vertical wall part 1c Sealing part 1d Slope part 2 Bonnet 3 Dash panel 3a Dash panel upper end part 5, 10, 11 Strength part 5a Upper wall 5b Front wall 5c Horizontal wall

Claims (3)

A cowl member disposed between a lower end portion of the front wind panel of the automobile, a rear end portion of the bonnet, and an upper end portion of the dash panel supports the rear end portion of the bonnet via a sealing material and is substantially omitted. Horizontally formed seal placing portion, a vertical wall portion formed substantially vertically from the seal placement portion toward the dash panel, and a rear end portion of the seal placement portion as a starting point obliquely upward It is formed at least from the slope part formed in a slope shape,
A vehicular cowl structure characterized in that a trough portion that protrudes toward the bonnet is formed across a trough portion in a trough portion between the seal placing portion and the slope portion. The cowl structure for an automobile according to claim 1,
An automotive cowl structure, wherein the strength portion is formed in a box shape by an upper wall, a front wall, and a lateral wall. The cowl structure for an automobile according to claim 1,
An automotive cowl structure in which the strength portion is formed in a rib shape.

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