JP2006199145A - Bumper sensor mounting structure - Google Patents

Abstract

An object of the present invention is to attach a sensor to a bumper without deteriorating the appearance.
SOLUTION: A hollow rib 17 is integrally formed on the back surface of a bumper 2, a sensor 14 is attached to the hollow rib 17, and the bumper 2 is connected to the hollow rib 17 while avoiding the design surface. Since the sensor 14 is arranged on the back side of the bumper 2 and the member on the sensor 14 side is hardly exposed on the surface (design surface) side of the bumper 2, it is difficult to attach the sensor 14 and the appearance is not impaired. Since the connection with the hollow rib 17 in the bumper 2 is performed while avoiding the design surface, it is possible to avoid sink marks that may occur in the bumper 2 from affecting the appearance when the hollow rib 17 is integrally formed with the bumper 2. . Since the hollow rib 17 for holding the sensor 14 is formed integrally with the bumper 2, the number of parts can be reduced, and holding means required when a member for holding the sensor is provided separately from the bumper, and A holding process becomes unnecessary.
[Selection] Figure 3

Description

  The present invention relates to a sensor mounting structure for a vehicle bumper to which a sensor such as an ultrasonic sensor is mounted.

Conventionally, a sensor such as an ultrasonic sensor for detecting an obstacle is sometimes attached to a bumper of a vehicle such as an automobile. An example of such a bumper sensor mounting structure is shown in FIG. 14 (see Patent Document 1). 14A and 14B, an attachment member 104 for holding the sensor 103 is inserted into an opening 102 formed in the bumper 101 of the automobile, and a flange 105 formed in the attachment member 104 is provided on the bumper 101. The sensor 103 is attached to the bumper 101 via the attachment member 104 in a state where the bumper 101 is sandwiched between the flange 105 and the attachment member 104 and arranged on the outside (lower side in FIG. 14A).
JP 2001-063497 A

  In the bumper sensor mounting structure shown in FIGS. 14A and 14B, the flange 105 is exposed to the outside of the bumper 101, and the flange 105 is wider than the opening 102 of the bumper 101. For this reason, the appearance was inferior.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a bumper sensor mounting structure capable of mounting a sensor to a bumper without causing deterioration in appearance.

The invention relating to the sensor mounting structure for a bumper according to claim 1 is characterized in that a rib is integrally formed on the back surface of the bumper and the sensor is mounted on the rib.
According to a second aspect of the present invention, in the sensor mounting structure for a bumper according to the first aspect, the rib is a hollow rib which is connected to the bumper at both ends thereof to form a hollow portion with the bumper. The invention according to claim 3 is characterized in that, in the bumper sensor mounting structure according to claim 1 or 2, the connection of the bumper with the rib is performed avoiding a design surface. To do.

According to a fourth aspect of the present invention, there is provided the bumper sensor mounting structure according to the second or third aspect, wherein the bumper includes a plate-like substrate portion and extends substantially perpendicularly from both side portions of the substrate portion. And an upper and lower plate portion having a substantially U-shaped cross section, one of the connecting portions on both ends of the rib being provided on one side of the upper and lower plate portions, and the upper and lower plates The one of the portions includes a double plate-shaped outer surface side and inner surface side plate portion, and the one of the connecting portions on both ends of the rib is provided on the inner surface side plate portion.
According to a fifth aspect of the present invention, in the sensor mounting structure for a bumper according to any one of the first to fourth aspects, the sensor is attached to the rib via a sensor holding member, and the sensor holding member is mounted. It joins to the back surface of the said bumper, It is characterized by the above-mentioned.
According to a sixth aspect of the present invention, in the sensor mounting structure for a bumper according to the fifth aspect, the sensor holding member is joined to the back surface of the bumper by a double-sided tape.

  According to the invention described in claims 1 to 6, a rib is integrally formed on the back surface of the bumper, a sensor is attached to the rib, and most of the sensor is disposed on the back side of the bumper. Since the sensor side member is hardly exposed, it is hard to notice that the sensor is attached and the appearance is not impaired.

Hereinafter, a sensor mounting structure for a bumper according to a first embodiment of the present invention will be described with reference to FIGS.
In FIG. 1 to FIG. 4, the bumper 2 of the automobile 1 is made of a resin material, is obtained by molding using a mold having a slide core, and is used as a rear bumper of the automobile 1. The bumper 2 has a bumper body 3 arranged to extend in the width direction on the rear side of the automobile 1, and is connected to both ends of the bumper body 3 so as to be substantially orthogonal to the bumper body 3. Left and right extending portions 4 and 5 having a substantially U-shape in plan view are provided.

The bumper body 3 has a plate-like rear side board portion 6 disposed so as to extend in the width direction on the rear side of the automobile 1, and extends substantially at right angles from both sides of the rear side board portion 6. 6 and the upper and lower plate portions 7 and 8 having a substantially U-shaped cross section. The upper plate part 7 is arranged above the automobile 1, and the lower plate part 8 is arranged below the automobile 1. The rear side substrate portion 6 is formed so as to connect the substrate portion main body 9 formed on the upper plate portion 7 side so as to extend along the longitudinal direction of the bumper main body 3, and the substrate portion main body 9 and the lower plate portion 8. In addition, a longitudinal bent portion 11 is provided on the front side (design surface) of the bumper 2 so as to protrude to the back side of the bumper 2 with a longitudinal recess 10.
Four holes (hereinafter referred to as sensor insertion holes) 12 are formed in the substrate body 9, and the resin sensor holding member 13 is accommodated on the back surface of the bumper 2 so as to face the four sensor insertion holes 12. The sensors 14 to be held are respectively arranged.

On the tip side (the front side of FIG. 2, the left side of FIG. 4) of the upper plate portion 7 (the upper side of claim 4, one of the lower plate portions 7 and 8), the outer surface side and the inner surface are formed in a double plate shape. Side plate portions 15 and 16 are extended.
Four hollow ribs (ribs) 17 are formed in the vicinity of the top of the inner surface side plate portion 16 corresponding to the four sensor insertion holes 12. The hollow rib 17 is obtained by integral molding with the inner surface side plate portion 16 and the bumper 2.
The hollow rib 17 is connected perpendicularly to the inner surface side plate portion 16 and extends toward the lower plate portion 8, and the hollow rib body 18 is orthogonal to the hollow rib body 18 on the tip side (lower plate portion 8 side) of the hollow rib body 18. And a rectangular hollow rib auxiliary plate 19 formed integrally with the hollow rib main body 18. One side portion 20 (left side in FIG. 3, right side in FIG. 4) of the hollow rib auxiliary plate 19 on the rear side substrate portion 6 side is connected to the top portion 21 of the bent portion 11.

The hollow rib main body 18 includes a hollow rib main body first plate portion 22 orthogonally connected to the inner surface side plate portion 16 and an upper plate portion 7 connected orthogonally to the hollow rib main body first plate portion 22. A hollow rib main body second plate portion 23 extending toward the rear side substrate portion 6 and connected to the hollow rib main body second plate portion 23 at right angles and extending toward the lower plate portion 8 along the substrate portion main body 9. The distal end side includes a hollow rib main body third plate portion 24 connected to the hollow rib auxiliary plate 19. A hollow portion 25 is formed between the hollow rib main body 18 and the bumper 2 (the rear side substrate portion 6, the upper side plate portion 7, and the inner surface side plate portion 16).
In this embodiment, a connecting portion (referred to as a first connecting portion) 31 with the inner surface side plate portion 16 of the hollow rib main body first plate portion 22 is one of the connecting portions on both ends of the rib according to claim 4. It is composed. As described above, one side portion 20 of the hollow rib auxiliary plate 19 is connected to the top portion 21 of the bent portion 11, and the connecting portion is hereinafter referred to as a second connecting portion 32 as appropriate.

Two anti-rattle ribs 33, 33 orthogonal to the hollow rib main body third plate portion 24 are provided at a predetermined distance in the vicinity of the hollow rib main body second plate portion 23 on one surface side of the hollow rib main body third plate portion 24. Are formed parallel to each other.
When the engagement plate 34 of the sensor holding member 13 is inserted into the portion between the two anti-rattle ribs 33, 33 in the hollow rib main body third plate portion 24, the sensor holding member 13, and thus the sensor holding member 13, is inserted. The held sensor 14 can be attached to the bumper 2.

The sensor holding member 13 includes a cylindrical sensor holding member main body 35 that houses the sensor 14 therein, and a hollow rib 17 (hollow rib main body on the outer surface side of the sensor holding member main body 35 in cooperation with the sensor holding member main body 35. A substantially plate-like engagement plate 34 that is bent so as to be able to sandwich the third plate portion 24). The sensor holding member 13 is fixed to the hollow rib 17 and thus the bumper 2 by sandwiching the hollow rib main body third plate portion 24 between the sensor holding member main body 35 and the engagement plate 34. The width of the engagement plate 34 is set slightly smaller than the distance between the two anti-rattle ribs 33, 33, and the engagement plate 34 can be swung, and thus the sensor holding member 13 can be loose. It can be prevented.
Two opposing engagement holes 36 are formed in a substantially middle portion of the sensor holding member main body 35 in the longitudinal direction. The elastic projections 37 formed on the outer peripheral portion of the sensor 14 are inserted into the two engagement holes 36 so that the sensor 14 is held by the sensor holding member 13.

  As described above, in the state where the sensor holding member 13 holding the sensor 14 is attached to the hollow rib 17 (hollow rib main body third plate portion 24) and the bumper 2, the tip portion 39 of the sensor 14 provided with the sensing portion 38 is The sensor insertion hole 12 of the bumper 2 is inserted, and the front end surface of the sensor 14 is arranged on the same plane as the substrate body 9.

According to the bumper sensor mounting structure according to the first embodiment configured as described above, most of the sensor 14 is disposed on the back side of the bumper 2, and the sensor is disposed on the surface (design surface) side of the bumper 2. The 14-side member is hardly exposed. For this reason, even if the sensor 14 is attached, the attachment of the sensor 14 is not noticeable and the appearance is not impaired. That is, in the state in which the bumper is sandwiched between the flange and the mounting member and the sensor is attached to the bumper via the mounting member, the flange is exposed to the outside of the bumper, so the appearance is inferior. However, according to the present embodiment, such a decrease in appearance can be avoided.
Further, the sensor insertion hole 12 of the bumper 2 may be set to a minimum size that allows the tip portion 39 of the sensor 14 to be inserted. Therefore, by reducing the sensor insertion hole 12 of the bumper 2, the appearance is increased accordingly. Can be suppressed.

The hollow rib main body first plate portion 22 of the hollow rib 17 is connected to the inner surface side plate portion 16, and the first connecting portion 31 as the connection portion is disposed inside the outer surface side plate portion 15 serving as a design surface. Therefore, even if sink marks are generated in the first connecting portion 31 due to the integral molding of the hollow rib 17 and the bumper 2, there is no influence on the appearance and a good appearance can be secured. Further, since the second connecting portion 32 is also provided at the top portion 21 of the bent portion 11 which is the back surface of the bumper 2, it is possible to avoid deterioration of the appearance.
Further, since the width dimension of the engagement plate 34 is set slightly smaller than the distance between the two anti-rattle ribs 33, 33, the sensor holding member 13 is rattled by the anti-rattle rib 33. Is prevented and held by the hollow ribs 17.

  Furthermore, in this first embodiment, since the hollow rib 17 is formed integrally with the bumper 2 to hold the sensor 14, the number of parts can be reduced correspondingly, and the member for holding the sensor 14 can be reduced. The holding means and the holding step which are required when providing a separate from the bumper 2 become unnecessary. For this reason, the structure can be simplified and the workability can be reduced, and as a result, the productivity can be improved.

  Next, a bumper sensor mounting structure according to a second embodiment of the present invention will be described with reference to FIGS. The bumper sensor mounting structure according to the second embodiment is made of resin instead of the sensor holding member 13 as shown in FIGS. 8 and 9 as compared with the bumper sensor mounting structure according to the first embodiment. The sensor second holding member 13A is provided, the sensor second holding member 13A includes the clip 45 and the rotation prevention pin 46, the hollow rib main body third plate portion 24 eliminates the rattling prevention rib 33, and The main difference is that a clip hole 47 and a rotation prevention pin hole 48 through which the clip 45 and the rotation prevention pin 46 are inserted, respectively, are formed.

The sensor second holding member 13A includes a substantially cylindrical sensor holding portion 49 that houses and supports the sensor 14, a substantially L-shaped sensor second holding member main body 50 that is connected to the sensor holding portion 49, and a sensor. The clip 45 and the rotation prevention pin 46 attached to the second holding member main body 50 are generally configured.
The sensor second holding member main body 50 includes a sensor second holding member main body first plate portion 51 connected to the sensor holding portion 49 and a sensor second connecting member orthogonal to the sensor second holding member main body first plate portion 51. 2 holding member main body second plate portion 52. A clip 45 and a rotation prevention pin 46 are attached to the sensor second holding member main body second plate portion 52 in a direction away from the sensor holding portion 49.

  The clip 45 is formed of a flexible material, and a clip shaft portion 53 that is vertically fixed to the sensor second holding member main body second plate portion 52 and a mountain-shaped presser portion 54 that is formed on the distal end side of the clip shaft portion 53. It consists of. The chevron presser 54 has a reduced diameter inwardly (on the side of the clip shaft 53) and is inserted into the clip hole 47 from the top, while the insertion proceeds and the sensor second holding member as shown in FIG. When the main body second plate portion 52 comes into surface contact with the hollow rib main body third plate portion 24, the diameter is expanded and the original state is restored, and the lower end side portion 55 engages with the edge of the clip hole 47. It is like that. Then, the lower end side portion 55 of the mountain-shaped presser portion 54 is engaged with the edge of the clip hole 47, and the rotation prevention pin 46 is inserted into the rotation prevention pin hole 48. The two plate portions 52 and thus the sensor 14 are fixed to the hollow rib 17 (and hence the bumper 2).

Also in the second embodiment, as in the first embodiment, most of the sensor 14 is arranged on the back side of the bumper 2, and most of the members on the sensor 14 side are on the surface (design surface) side of the bumper 2. Not exposed. For this reason, even if the sensor 14 is attached, the attachment of the sensor 14 is not noticeable and the appearance is not impaired.
Further, the sensor insertion hole 12 of the bumper 2 may be set to a minimum size that allows the tip portion 39 of the sensor 14 to be inserted. Therefore, by reducing the sensor insertion hole 12 of the bumper 2, the appearance is increased accordingly. Can be suppressed.

  In the first embodiment, the sensor holding member 13 is made of resin, and in the second embodiment, the sensor second holding member 13A is made of resin. However, the present invention is not limited to this, and the sensor holding member 13 and the sensor are not limited thereto. The second holding member 13A may be made of metal.

  Next, a bumper sensor mounting structure according to a third embodiment of the present invention will be described with reference to FIGS. The bumper sensor mounting structure according to the third embodiment is compared with the bumper sensor mounting structure according to the first embodiment as shown in FIGS. The sensor holding member 13 of the embodiment and the sensor second holding member 13A of the second embodiment are referred to as a sensor third holding member for the sake of convenience.) The main difference is that the annular retainer 60 that is extended is provided, and the retainer 60 and the substrate body 9 (bumper 2) are joined by a double-sided tape 61 made of acrylic foam.

  In the sensor mounting structure of the bumper according to the third embodiment, the sensor third holding member 13B holding the sensor 14 and the engagement plate 34 sandwich the hollow rib 17 (hollow rib main body third plate portion 24), The sensor 14 (sensor third holding member 13B) is attached to the bumper 2, and the sensor 14 (sensor third holding member 13B) is held by the double-sided tape 61 on the substrate body 9 (bumper 2). It can be held securely.

In the third embodiment, the case where the sensor third holding member 13B is made of resin is taken as an example. Instead, in order to improve the followability to the back surface of the bumper 2, a thermoplastic resin or thermoplastic resin is used. An elastomer may be used. In addition, the retainer 60 of the third sensor holding member 13B is configured separately from other portions, and the retainer 60 is made of a thermoplastic resin or thermoplastic to improve followability to the back surface of the bumper 2. It may be made of an elastomer.
In the third embodiment, the case where the double-sided tape 61 made of acrylic foam is used as an example. However, the present invention is not limited to this, and the double-sided tape 61 made of other materials may be used.
In the third embodiment, the case where the retainer 60 and the substrate body 9 (bumper 2) are joined by the double-sided tape 61 is taken as an example. However, the present invention is not limited to this, and it is configured to be joined using an adhesive. May be.

In each of the above-described embodiments, the bumper 2 in which the bumper is used as the rear-side bumper is taken as an example.
In each of the above embodiments, the rib is the hollow rib 17 as an example, but a cantilevered rib may be used.

1 is a perspective view schematically showing a bumper in which a sensor mounting structure for a bumper according to a first embodiment of the present invention is used. It is a perspective view of the partial cross section which shows the sensor mounting structure of the bumper which concerns on 1st Embodiment of this invention. It is a perspective view shown along the cross section of the BB line of FIG. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the CC line of FIG. It is a figure of D arrow of FIG. It is a perspective view which shows the sensor holding member of FIG. It is a perspective view which shows the sensor 2nd holding member of the sensor mounting structure of the bumper which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the sensor attachment state of the sensor attachment structure of the bumper which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the sensor attachment structure of the bumper which concerns on 3rd Embodiment of this invention. It is sectional drawing which follows the cross section of the EE line of FIG. It is a figure of F arrow of FIG. It is a perspective view which shows the sensor 3rd holding member of FIG. An example of the sensor mounting structure of the conventional bumper is shown, (A) is sectional drawing, (B) is a figure which shows a flange.

Explanation of symbols

2 ... bumper, 6 ... rear side board part, 7, 8 ... upper side, lower side board part, 6 ... rear side board part, 15, 16 ... outer side, inner side side board part, 22 ... hollow rib main body first plate part.

Claims (6)

  A bumper sensor mounting structure, characterized in that a rib is integrally formed on the back surface of the bumper and a sensor is mounted on the rib.   2. The bumper sensor mounting structure according to claim 1, wherein the ribs are hollow ribs whose both ends are connected to the bumper to form a hollow portion with the bumper. 3.   The bumper sensor mounting structure according to claim 1, wherein the bumper is connected to the rib while avoiding a design surface. The bumper includes a plate-like substrate portion, and upper and lower plate portions extending substantially at right angles from both side portions of the substrate portion and having a substantially U-shaped cross section together with the substrate portion. One of the parts is provided on one side of the upper and lower plate parts,
In addition, the one of the upper and lower plate portions includes an outer surface side and an inner surface side plate portion having a double plate shape, and one of the connecting portions on both ends of the rib is provided on the inner surface side plate portion. The bumper sensor mounting structure according to claim 2 or 3, wherein   The bumper sensor according to any one of claims 1 to 4, wherein the sensor is attached to the rib via a sensor holding member, and the sensor holding member is joined to a back surface of the bumper. Mounting structure. The bumper sensor mounting structure according to claim 5, wherein the sensor holding member is bonded to the back surface of the bumper with a double-sided tape.