JP2008074174A - Shock absorbing member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent damage to wiring arranged so as to intersect a shock absorbing member without impairing shock absorbing performance. <P>SOLUTION: The shock absorbing member E1 is constituted by combining a plurality of first ribs 40 oppositely extending, and a plurality of second ribs 42 extending in a direction intersecting the first ribs 40 and opposing to each other. In the shock absorbing member E1, a passage 30 is formed, which opens a first opening portion 44 opening to a block space 45 defined by the adjacent second ribs 42, 42 on the first rib 40 and permits the insertion of the wiring H. At one opening edge of the first opening portion 44 in the first rib 40 forming an outer wall of the shock absorbing member E1, a wall portion 46 curving toward the inside of the passage 30 is provided. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an impact absorbing member configured by combining a first rib forming an outer wall and a plurality of second ribs extending in a direction crossing the first rib and facing each other.

  As shown in FIG. 8, an impact absorbing member is provided as one of the vehicle constituent members for reducing the impact of the occupant in the event of a collision on the roof side portion 14 extending in the front-rear direction on the side of the roof portion 12 of the vehicle body 10. An EA is disposed (see, for example, Patent Document 1). The shock absorbing member EA is defined between a roof side rail 16 extending to the roof side portion 14 and a ceiling member 20 that covers the passenger compartment 18 side of the roof side rail 16 and is attached to the roof portion 12. It is accommodated in the formed gap 22 (see FIG. 9). Here, as shown in FIG. 10, a synthetic resin molded product in which plate-like ribs 24 are combined in a lattice shape is employed as the impact absorbing member EA.

  The roof side portion 14 is provided with a cable for supplying power to a lamp or the like, a harness that collects control wiring, a pipe exemplified by a drain hose, etc. (hereinafter collectively referred to as wiring H). The Here, since the shock absorbing member EA extends in the front-rear direction of the roof side portion 14, for example, in order to pass the wiring H between the roof portion 12 side and the pillar portion 26 side, the shock absorbing member EA is shock absorbing. It is necessary to wire across the member EA (see FIG. 8). Therefore, as shown in FIG. 10, grooves 28 are formed in the ribs 24 constituting the shock absorbing member EA, respectively, and the shock absorbing members EA are crossed through a passage 30 formed by a block space between the grooves 28 and the ribs 24. Wiring H is provided (see, for example, Patent Document 2).

Further, if the wirings H are arranged on the roof side portion 14 in a free state where nothing is held, the wirings H interfere with other members at the time of assembly, and the assembly workability is deteriorated. There is a possibility that the wiring H comes into contact with other parts or the like due to vibration and generates abnormal noise. Therefore, the holding member 32 that holds the wirings H is provided on the outer surface of the shock absorbing member EA, and the wirings H are held along the shock absorbing member EA by the holding member 32, whereby the wirings H are fluttered. It comes to suppress.
JP 2006-1478 A JP 2002-142326 A

  By the way, the opening edge of the groove portion 28 in the rib 24 is exposed to the edge of the rib 24, so that the wiring H may be damaged if it comes into strong contact with the opening edge. In particular, in the configuration in which the passage 30 is provided in the shock absorbing member EA in a straight line, when the wiring H arranged along the outer surface of the shock absorbing member EA is bent and inserted into the passage 30, the bent portion of the wiring H is changed. Since the angle is steep, the wiring H is burdened (see part A in FIG. 10). As described above, since the bent portion of the wiring line H becomes cramped, there is a high possibility that the wiring line H is broken, damaged, or disconnected. Moreover, if the opening edge of the groove part 28 contacts the bending part of the wiring H with load, the possibility that the wiring H will be damaged becomes high. Therefore, this problem can be prevented by bending the wirings H so as to be gently bent (see B part in FIG. 10). However, since the wiring H is separated from the shock absorbing member EA, interference between the wiring H and other members is caused. Further, since the bent portion is not held by the holding member 32, it may cause abnormal noise when the vehicle travels. In addition, the width of the groove portion 28 is set to be large, or the groove portion 28 is disposed on the shock absorbing member EA so that the passage 30 extends obliquely, instead of providing the passage 30 linearly along the rib 24. It is possible to deal with this. However, in the shock absorbing member EA, increasing the width of the groove portions 28 and the number of the groove portions 28, or providing the passages 30 obliquely leads to a reduction in the ribs 24, and the shock absorbing performance is impaired. I can't.

  That is, the present invention has been proposed in order to suitably solve these problems inherent in the conventional shock absorbing member according to the prior art, and is arranged across the shock absorbing member while maintaining the shock absorbing performance. An object of the present invention is to provide an impact absorbing member capable of preventing the wiring to be provided from being damaged.

In order to overcome the above-mentioned problems and achieve the intended purpose, the impact absorbing member of the invention according to claim 1 of the present application is
The first rib forming the outer wall and a plurality of second ribs extending in a direction crossing the first rib and facing each other are combined and opened in a block space defined by adjacent second ribs. In the shock absorbing member configured to open the opening to be formed in the first rib to form a passage that allows the wiring to be inserted,
The opening edge of the opening is provided with a wall that curves toward the inside of the passage.
According to the first aspect of the present invention, by forming a curved wall portion at the opening edge of the opening portion, it is possible to reduce a load applied when wirings inserted through the passage come into contact with the wall portion. Further, by bending the wirings along the shape of the wall portion, it is possible to increase the bending radius of the bent portion, so that the bending load applied to the bent portion of the wirings can also be reduced. Further, since the passage is formed in the block space defined by the adjacent second ribs, it can be arranged so as to cross the wirings at the shortest distance. That is, it is possible to avoid problems such as crushing, scratching, and disconnection of wiring due to contact or bending of the opening with the opening edge. In addition, since the wall portion functions as a part of the rib, the required shock absorbing performance can be maintained without causing a decrease in rigidity.

The invention according to claim 2 is characterized in that the wall portion is formed independently of the second rib.
According to the second aspect of the present invention, since the wall portion is formed independently of the second rib, the wall portion functions as a part of the rib separately from the second rib, and the shock absorbing performance is obtained. Can be maintained.

The gist of the invention according to claim 3 is that the wall portion is connected to the second rib and has a curved shape that bulges into the block space from the second rib.
According to the invention which concerns on Claim 3, a wall part and a 2nd rib can be made to act jointly at the time of shock absorption by connecting a wall part to a 2nd rib. Moreover, since the extended dimension of a wall part becomes long by making it a curved shape which bulges in a block space from a 2nd rib, a shock absorption performance can be maintained.

According to a fourth aspect of the present invention, an auxiliary rib connected to the wall portion is provided at a position biased inward from the first rib provided with the wall portion, and the auxiliary rib connected to the opening portion is arranged at a position aligned with the opening portion. The gist is that a second opening that allows insertion of wirings is formed.
According to the invention according to claim 4, by providing an auxiliary rib that is biased to the inside of the first rib, without damaging the damage-preventing action on the wiring at the opening of the first rib and the handling of the wiring, The shock absorbing performance can be improved by increasing the number of ribs.

The gist of the invention according to claim 5 is that a holding member for holding the wirings is provided at a portion of the first rib connected to the wall portion.
According to the invention according to claim 5, since it is possible to increase the bending radius of the bent portion of the wiring by the wall portion, even if the holding member is provided in the continuous portion of the first rib and the wall portion, The bent part of wiring does not become cramped. That is, by fixing the wirings in the vicinity of the bent portions of the wirings with the holding member, it is possible to prevent the wirings from vibrating when the vehicle travels, and to avoid the generation of abnormal noise and the wirings being damaged.

The gist of the invention according to claim 6 is that the wall portion is provided so as to extend from one end edge of the first rib to the other end edge.
According to the invention which concerns on Claim 6, since a wall part is formed over the full length of the width direction of the 1st rib provided continuously, the fall of the shock absorption performance by having opened the opening part can be prevented.

  According to the impact absorbing member of the present invention, it is possible to prevent damage caused by the opening edge of the opening constituting the passage with respect to the wirings inserted through the passage while maintaining the required impact absorbing performance.

  Next, the shock absorbing member according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments. For convenience of explanation, the same components as those of the vehicle body 10 shown in FIGS. 8 and 9 are denoted by the same reference numerals, and detailed description thereof is omitted. In the embodiment, a case will be described in which an impact absorbing member is disposed on the roof side portion 14 described above to protect the occupant during a collision. Here, the wiring H is a general term for a cable for supplying power to a lamp or the like, a harness for collecting control wiring, a pipe exemplified by a drain hose, and the like.

  As shown in FIGS. 3 and 4, the shock absorbing member E <b> 1 is set to an outer shape and size that can be accommodated in the gap 22 of the roof side portion 14 defined between the roof side rail 16 and the ceiling member 20. It is an elongate member that is dimensioned to extend from the front seat to the rear seat. The shock absorbing member E1 extends in the longitudinal direction of the roof side portion 14 and is spaced apart in the vertical direction. The first ribs 40, 40 forming the outer wall of the shock absorbing member E1, and the first rib 40 A plurality of second ribs 42 extending in the intersecting vertical direction and facing each other at appropriate intervals in the longitudinal direction of the first rib 40 are combined (see FIG. 1 or FIG. 2). Further, a third rib 43 extending substantially parallel to the first rib 40 is provided between the pair of first ribs 40, 40. That is, the shock absorbing member E1 has a lattice shape including the first rib 40, the second rib 42, and the third rib 43. The shock absorbing member E1 is formed by integrally molding the first rib 40, the second rib 42, and the third rib 43 from a synthetic resin such as polypropylene by an injection molding technique.

  The first ribs 40, the second ribs 42, and the third ribs 43 are plate-like with a thickness set to about 1 mm as a whole, and the inner and outer directions of the vehicle body 10 are between the adjacent second ribs 42, 42. An open block space 45 is formed. The block space 45 is vertically divided by the third ribs 43 between the first ribs 40 that are separated in the vertical direction. In the shock absorbing member E1, the distance between the ribs 40 and 42 is set so that any part has the same shock absorbing performance. When the external force is applied through the ceiling member 20, the impact absorbing member E1 is designed to absorb the impact by buckling deformation of the first rib 40, the second rib 42, and the third rib 43. Yes.

  A pair of first ribs 40, 40 is provided with a first opening (opening) 44 that opens to the same block space 45. In addition, the third rib 43 is also provided with a third opening 43 a at a position that opens into the block space 45 where the first opening 44 opens and is linearly aligned with the first opening 44. That is, the shock absorbing member E1 is formed with a passage 30 for arranging the wiring H by the first opening 44, the third opening 43a and the block space 45, and the wiring is arranged in the vertical direction of the shock absorbing member E1. Class H crosses. The first opening 44 is formed so as to be cut out over the entire length in the width direction from the edge of the first rib 40 on the ceiling member 20 side (one side) to the edge of the vehicle body 10 side (the other side). The part 44 is open to the vehicle body 10 side and the ceiling member 20 side. Moreover, the 3rd opening part 43a is formed in the groove shape which notched the edge of the 3rd rib 43 which faces the passenger compartment 18 side, and the 3rd opening part 43a opens to the ceiling member 20 side. ing.

  A wall 46 that curves toward the inside of the passage 30 (block space 45) is provided on one of the opposing opening edges of the first opening 44 provided in the first rib 40. In addition, the wall part 46 is formed in quadrant arc shape centering on the open direction of the block space 45 (refer FIG. 1). The wall 46 is formed independently of the second rib 42 extending to the opening edge side of the first opening 44 where the wall 46 is provided, and the other end of the wall 46 (facing the block space 45). End) is separated from the second rib 42. Further, the wall portion 46 is provided so as to extend over the entire length in the width direction of the first rib 40 that is continuously provided, and the dimension along the opening direction of the block space 45 in the wall portion 46 is the same as that of the first rib 40. (See FIG. 2). The first opening 44 is set wider than the third opening 43a.

  In the first embodiment, the upper first rib 40 is provided with a wall portion 46 at the opening edge on the front side (the vehicle front side in FIG. 3) of the first opening portion 44, whereas the lower first rib 40 is provided with the wall portion 46. Is provided with a wall 46 at the opening edge of the first opening 44 on the rear side (the vehicle rear side in FIG. 3). That is, in the shock absorbing member E1, the portions defining the passage 30 in the upper and lower first ribs 40, 40 have a symmetrical shape inverted by 180 °.

  The impact absorbing member E1 is provided with an auxiliary rib 48 at a position that deviates inward from the first rib 40 provided with the wall portion 46 in the block space 45 provided with the passage 30. One end of the auxiliary rib 48 is connected to the other end of the wall portion 46, and the other end is connected to the second rib 42 that forms the opening edge of the first opening portion 44 that faces the wall portion 46. The first rib 40 is configured to extend in the same direction. The auxiliary rib 48 is formed with a second opening 50 at a position aligned with the first opening 44 and the third opening 43 a, and the second opening 50 constitutes a part of the passage 30. In addition, the 2nd opening part 50 is formed in the groove shape which notched the edge of the auxiliary | assistant rib 48 which faces the passenger compartment 18 side, and is open to the ceiling member 20 side. Here, the directions of the open ends of the first to third openings 44, 50, and 43a are set in consideration of the order in which the shock absorbing member E1 and the wiring H are attached to the vehicle body 10. That is, in the embodiment, the first opening 44, the second opening 50, and the third opening 43a are opened on the passenger compartment 18 side (ceiling member 20 side), and the shock absorbing member is formed on the vehicle body 10 (roof side rail 16) side. The wiring H is attached after E1 is attached.

  A plurality of holding members 32 are provided on the outer surface (upper surface and lower surface) of the shock absorbing member E1 at a predetermined interval in the extending direction of the first rib 40, and the wiring members H are connected to the shock absorbing member by the holding member 32. It is held so as to extend along the outer surface of E1. The holding member 32 is provided on the upper first rib 40 on the front side of the vehicle with respect to the passage 30, whereas it is provided on the lower first rib 40 on the rear side of the vehicle with respect to the passage 30 (see FIG. 3). ). Some of the holding members 32 are provided at portions where the upper and lower first ribs 40 are connected to the wall portion 46. Each holding member 32 is a substantially L-shaped member having a flexibility integrally formed on the outer surface of the first rib 40, and is configured to hold the wiring H between the holding member 32 and the first rib 40. It is. The holding member 32 has an open end on the roof side rail 16 side so as to allow attachment of the wirings H from the roof side rail 16 side.

  The wiring H held by the holding member 32 extends along the upper surface of the shock absorbing member E1 on the vehicle front side from the passage 30 and is bent toward the passage 30 by the upper first opening 44 to absorb the shock. The member E1 is assembled so as to cross the vertical direction (see FIG. 1). Further, the wiring H crossing the passage 30 is bent toward the rear side of the vehicle by the lower first opening 44 and is held by the holding member 32 so as to extend along the lower surface of the shock absorbing member E1. Assembled to. That is, the wall 46 is provided at the opening edge of the first opening 44 corresponding to the inside of the bent portion of the wiring H inserted through the passage 30. Here, since the wiring H is gently bent along the curved wall 46 provided at the opening edge of the first opening 44, the contact load on the wiring H can be reduced. Further, by bending the wiring H along the wall 46, the bending radius of the bent portion can be increased, and the bending load applied to the bent portion of the wiring H can be reduced. Therefore, adverse effects such as crushing, scratching, and disconnection of the wiring H due to contact or bending with respect to the opening edge of the first opening 44 can be avoided.

  As described above, in the configuration in which the bent portion of the wiring line H is guided along the wall portion 46, the holding member 32 can be provided at the connection portion between the first rib 40 and the wall portion 46. The wiring member H can be held at a portion close to the opening edge of the first opening 44 by the member 32. Further, since the bent portion of the wirings H does not protrude into the gap 22 of the roof side portion 14, the wirings H do not interfere with other members. Then, the wiring H is fixed by the holding member 32 in the vicinity of the bent portion of the wiring H, so that the vibration of the wiring H during traveling of the vehicle is prevented, and generation of abnormal noise and damage to the wiring H are avoided. Can do.

  As described above, the first opening 44 is formed in the first rib 40 so as to open to the block space 45 formed by the adjacent second ribs 42 and 42, and the first rib 40 and the second rib 42 intersect. It is not necessary to form the first opening 44 in the portion. Further, the second rib 42 is not provided with a notch or a hole. And since the wall part 46 is provided in the opening edge of the 1st opening part 44, even if the 1st rib 40 is notched, the area | region of a rib can be ensured and shock absorption performance can be maintained. Here, since the wall portion 46 extends from the edge on the vehicle body 10 side to the edge on the ceiling member 20 side in the first rib 40 that is provided continuously, when an external force is applied to the ceiling member 20, As with the first rib 40, one end edge contacts the ceiling member 20, and the other end edge contacts the vehicle body 10. Therefore, the wall portion 46 can also function as a part of the rib so as to effectively absorb the external force, and the impact absorption performance can be prevented from being lowered due to the opening of the first opening portion 44. In the first embodiment, since the wall portion 46 is formed independently of the second rib 42, the wall portion 46 functions as a part of the rib separately from the second rib 42. That is, according to the shock absorbing member E1 in which the opening edge of the first opening 44 is configured by the wall 46, the load applied to the wiring H can be reduced while maintaining the shock absorbing performance, and the wiring H is managed. Can make it easier. In addition, by providing the auxiliary rib 48, even if the first opening 44 having a large size in the front-rear direction is formed in the first rib 40 forming the outer surface, the rib area can be secured by the auxiliary rib 48. Performance can be improved.

  As shown in FIGS. 5 and 6, in the shock absorbing member E <b> 2 according to the second embodiment, the wall portion 52 provided at the opening edge of the first opening portion 44 provided in the first rib 40 is connected to the second rib 42. It is provided with a curved shape that bulges into the block space 45 from the second rib 42. The wall portion 52 is formed in a semicircular arc shape with the opening direction of the block space 45 as an axis, and one end is connected to the first rib 40 and the other end is connected to the tip of the second rib 42. Since the basic configuration of the shock absorbing member E2 of the second embodiment is the same as that of the first embodiment, the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  Since the wall portion 52 of the second embodiment has a shape that curves toward the inside of the passage 30 from the extending direction of the first rib 40, the same effect as the wall portion 46 of the first embodiment is achieved. In the second embodiment, the wall portion 52 and the second rib 42 are connected to each other, and the end of the second rib 42 is connected to the first rib 40 forming the outer surface. Compared with the member E1, the intersection of the first rib 40 and the second rib 42 is reduced. However, in the second embodiment, since the wall portion 52 is formed to be curved so as to draw a semicircular arc when viewed from the front, the extension dimension of the wall portion 52 becomes long and the function of the wall portion 52 as a rib is high. . Accordingly, the wall portion 52 can compensate for the reduction of the intersection between the first rib 40 and the second rib 42, and the shock absorbing performance can be maintained as a whole.

  As shown in FIG. 7, in the shock absorbing member E3 according to the third embodiment, the first opening 44 constituting the passage 30 through which the wiring H is inserted faces the end of the first rib 40 facing the passenger compartment 18 side. The first opening 44 is formed on the ceiling member 20 side so as to be formed in a groove shape with a notched edge. Further, a wall 46 that curves toward the inside of the passage 30 is provided on one of the opening edges of the first opening 44 independently of the second rib 42 as in the first embodiment. The wall 46 is formed so as to extend over the entire length in the width direction of the first ribs 40 that are continuously provided. Since the wall portion 46 is formed in this way, the same effects as those of the first embodiment can be obtained with respect to the shock absorbing member E3 of the third embodiment. In the impact absorbing member E3 of Example 3, the first ribs 40 are not completely divided in the width direction at the first openings 44, and a part of the first ribs 40 remains at the positions where the first openings 44 are formed. As a result, it is possible to suppress a decrease in the shock absorbing performance in the first rib 40. Here, in the shock absorbing member E3 of the third embodiment, the configuration in which the auxiliary rib 48 described in the first embodiment is not provided is described as an example, but the auxiliary rib 48 may be provided. Since the basic configuration of the impact absorbing member E3 of the third embodiment is the same as that of the first embodiment, the same components as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

(Change example)
The above-described embodiments can be modified as follows.
(1) In the embodiment, the case where the impact absorbing member is disposed on the roof side portion has been described. However, the present invention can also be applied to the impact absorbing member provided in the roof portion, the pillar portion, and other portions.
(2) In the embodiment, the wall portion is provided only on one of the opening edges in the opening portion, but the wall portions may be provided on both sides of the opening edge.
(3) In the embodiment, the opening is notched so as to open toward the passenger compartment (inward of the vehicle body), but the opening is notched toward the roof side rail (outside of the vehicle body). May be. Moreover, the hole shape opened to the 1st rib may be sufficient instead of the shape which cut off the 1st rib like an Example.

It is a front view which shows the principal part of the impact-absorbing member which concerns on suitable Example 1 of this invention. FIG. 3 is a schematic perspective view showing a main part of the impact absorbing member of Example 1. It is the schematic which shows the roof side part which arrange | positioned the impact-absorbing member of Example 1. FIG. It is the XX sectional view taken on the line of FIG. It is a front view which shows the principal part of the impact-absorbing member of Example 2. It is a schematic perspective view which shows the principal part of the impact-absorbing member of Example 2. FIG. 6 is a schematic perspective view showing a main part of an impact absorbing member of Example 3. It is the schematic which shows the impact-absorbing member arrange | positioned at the roof side part. It is the YY sectional view taken on the line of FIG. In the conventional impact-absorbing member, it is a schematic perspective view which shows the path | route of wiring.

Explanation of symbols

30 passages, 32 holding members, 40 first ribs, 42 second ribs 44 first openings (openings), 45 block spaces, 46, 52 walls, 48 auxiliary ribs 50 second openings, H wirings

Claims (6)

The first rib forming the outer wall and a plurality of second ribs extending in a direction crossing the first rib and facing each other are combined and opened in a block space defined by adjacent second ribs. In the shock absorbing member configured to open the opening to be formed in the first rib to form a passage that allows the wiring to be inserted,
An impact absorbing member, wherein a wall portion curved toward the inside of the passage is provided at an opening edge of the opening portion.   The impact absorbing member according to claim 1, wherein the wall portion is formed independently of the second rib.   The impact absorbing member according to claim 1, wherein the wall portion is connected to the second rib and has a curved shape that bulges from the second rib into the block space.   An auxiliary rib connected to the wall portion is provided at a position that deviates inward from the first rib provided with the wall portion, and the wiring is allowed to pass through the auxiliary rib at a position aligned with the opening. The impact-absorbing member according to any one of claims 1 to 3, wherein two openings are formed.   The impact absorbing member according to any one of claims 1 to 4, wherein a holding member that holds the wirings is provided at a portion of the first rib that is connected to the wall portion.   The said wall part is an impact-absorbing member as described in any one of Claims 1-5 provided so that it may extend over the other edge from one edge in the 1st rib provided continuously.

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