JP5815189B2 - Fender protector - Google Patents

Description

  The present invention relates to a configuration of a fender protector that covers an inner side of a tire house of a vehicle, and in particular, a panel portion formed at an end portion of a fender protector that fixes a flange portion extending inwardly from a back surface of a lower side of a bumper. Is related to the configuration of

  Conventionally, many bumpers manufactured using a synthetic resin material are used as exterior panels of automobiles. By manufacturing a bumper by molding a synthetic resin material, it is possible to reduce the weight of the bumper, and relatively easily obtain a bumper having a complicated shape that is difficult to obtain when the bumper is formed by press forming of a steel plate. be able to.

  And because it becomes possible to manufacture bumpers in complex shapes, the bumpers can be configured in a curved and smooth streamlined design, and the bumpers can be made into aerodynamically advantageous shapes with reduced air resistance. Can be configured.

  In addition, in bumpers made of steel plates, if the surface of the bumper has chipping scratches caused by pebbled pebbles, etc., the paint will be scraped off, and rainwater etc. will come into contact with the scraped scratches to corrode the steel plate. The problem will end up. In order to reduce the effect of chipping scratches, it is required to apply a chipping-resistant resin coating to the steel sheet. For these reasons, many resin panels have been adopted as bumpers instead of steel plate panels.

  On the other hand, the use of an under panel that covers the lower surface of an automobile is also increasing. By adopting an under panel, for example, the lower surface of engines and accessories can be protected in gasoline vehicles and diesel vehicles, and the lower surfaces of motors, inverters, secondary batteries, etc. can be protected in hybrid vehicles and electric vehicles. it can. And in order to improve an air resistance surface, the lower surface of an under panel can be formed flat.

  In the sporty vehicle, the under panel is also configured as a large panel so that the lower surface can be covered over a wide range. Even in a family car, there are cases where the front bumper and the front wheel house, or under the radiator and before the engine oil pan are covered with an under panel. For example, a flat part is added to the front of the fender protector (the inner lining of the wheel house), and the flat part is extended, and the flat part between the lower part of the bumper (front skirt) is also adopted. Yes.

  A fender protector that covers the wheel in the wheel house is a component of the under panel. A flange formed on the bumper can be attached to the panel formed on the end of the fender protector. As a structure in which the flange portion of the bumper is fixed to the panel portion of the fender protector, a structure for attaching a fender liner (corresponding to the fender protector in the present invention) to the bumper has been proposed (see Patent Document 1).

  In the invention described in Patent Document 1, the configurations shown in FIGS. 13 and 14 are disclosed. As shown in FIG. 13, a lower flange 34 and a rib 35 are arranged in parallel on the lower rear side of the bumper 33. A recessed portion 31 is formed in the front end portion 40a of the panel portion 40 of the fender liner 30. By forming the recessed portion 31, the height in the vertical direction at the front end portion 40a of the panel portion 40 is configured to be slightly larger than the distance between the lower flange 34 and the rib 35. ing.

  By inserting the recessed portion 31 between the lower flange 34 and the rib 35, and inserting the clip 37 into the mounting hole 36 formed in the rib 35 and the insertion hole 32 formed in the panel portion 40 of the fender liner 30, The bumper 33 can be fixed to the panel unit 40.

  The invention described in Patent Document 1 also discloses a modification shown in FIG. In the modification shown in FIG. 14, a lower flange 34 is disposed on the lower rear side of the bumper 33, but the rib 35 shown in FIG. 13 is not configured. Instead, a stepped portion 38 is formed in the front end portion of the panel portion 40 of the fender liner 30 through the notch portion 39 along the width direction of the panel portion 40. Then, the clip 37 is inserted between the insertion hole 32 of the panel part 40 and the mounting hole 36 of the lower side flange 34 in a state where the lower side flange 34 is press-fitted into the gap formed between the panel part 40 and the step part 38. By doing so, the bumper 33 can be fixed to the panel portion 40.

Microfilm of Japanese Utility Model Application No. 1-46570 (Japanese Utility Model Application Laid-Open No. 2-136784)

  In the invention described in Patent Document 1, the rib 35 and the lower flange 34 are formed in a configuration in which they are spaced apart in parallel. Moreover, the rib 35 is formed at a high position slightly away from the position of the lower flange 34. Therefore, when the bumper 33 is molded by resin molding, a groove-like line due to heat shrinkage, that is, a so-called sink line is likely to occur at the base portion of the rib 35. When a sink line is generated, particularly when the outer surface of the bumper 33 is painted in accordance with the color of the vehicle body, the sink line becomes conspicuous. For this reason, in an automobile equipped with a bumper with conspicuous sink marks, the appearance quality as an automobile is degraded.

  In addition, the outer surface shape of the bumper 33 in the vehicle of Patent Document 1 has a relatively linear outer surface shape. However, in recent years, a shape that frequently uses a curved outer surface shape is frequently used without adopting a linear outer surface shape as the outer surface shape of the bumper. When the outer surface shape of the bumper is formed in a curved outer surface shape, the corner portion is also configured as a large curvature surface. The edge shape of the front end portion 40a of the panel portion 40 of the fender liner 30 is configured to be a curved shape that matches the bumper 33. And the attachment location of the bumper 33 between the panel parts 40 is also attached at a plurality of locations.

  Both the bumper 33 and the fender liner 30 have a configuration in which a synthetic resin is molded, but synthetic resin materials having different performances according to the required performance required for the bumper 33 and the fender liner 30 are different. Is selected. As the bumper 33, the exterior can be painted, and a certain thickness is required as the plate thickness. Therefore, as the synthetic resin material for the bumper 33, a synthetic resin material that can be configured with a plate thickness and high rigidity is selected.

  On the other hand, the fender liner only needs to be able to cover the inner surface of the wheel house and prevent damage when pebbles or the like wound up by the tire hit the inner surface of the wheel house. For this reason, it is only necessary that the pebbles or the like are not easily broken even when they collide with each other. Rather, in order to reduce the weight of the vehicle, it is preferable to have the minimum necessary thickness. And it can be made a soft structure to some extent. Therefore, as a synthetic resin material for the fender liner, a material having such fluidity that enables molding of a thin-walled product, that is, molding processability is selected with the focus on such impact resistance.

  In this way, different synthetic resins are used for the bumper 33 and the fender liner 30, and there is a difference in thermal behavior against thermal deformation between the bumper 33 and the fender liner 30. .

  That is, the linear expansion coefficient of the synthetic resin material constituting the bumper 33 and the linear expansion coefficient of the synthetic resin material constituting the fender liner 30 have different linear expansion coefficients. As a result, the bumper 33 and the fender liner 30 have different behaviors of thermal expansion or thermal contraction due to temperature changes. That is, the bumper 33 has a lower thermal expansion / contraction rate due to thermal deformation, and the fender liner 30 has a higher thermal expansion / contraction rate. If the bumper 33 and the fender liner 30 having such different characteristics are fixed to each other at a plurality of fixing points, an excessive tensile force is applied to the fixing points.

  As the temperature changes, the fender liner 30 expands and contracts more than the bumper 33. Therefore, when the fender liner 30 extends greatly, the fender liner 30 is slackened. In addition, if thermal expansion and contraction are repeated between members with different elongation rates, the fender liner 30, which is a member with a large elongation rate, is likely to cause white turbidity. Will become brittle. As a result, the installation between the bumper and the fender liner may be deteriorated, and the aesthetics may be impaired due to a gap.

  Since it is configured in this manner, the configuration shown in FIG. 13 cannot absorb thermal expansion that occurs at the front end portion 40a of the panel of the fender liner 30 at a high temperature. And the recessed part 31 will hang down from the lower side flange 34, and the appearance of the bumper 33 will be reduced.

  In the configuration of FIG. 14, for example, when the outside air temperature is low, the heat shrinkage in the fender liner 30 is larger than the heat shrinkage in the bumper 33, so the clip 37 is formed on the fender liner 30 that fixes the bumper 33. A tensile force acts between the pair of insertion holes 32. That is, the clip 37 engaged with the bumper 33 hardly moves and tries to keep the pair of insertion holes 32 substantially constant, whereas the fender liner 30 tries to greatly reduce the distance between the pair of insertion holes 32. . As a result, a tensile force acts between the pair of insertion holes 32 in the fender liner 30.

Then, in the pair of insertion holes 32, the diameter of the holes is increased. In addition, the notch 39 may be further torn by the tensile force acting between the insertion holes 32 of the fender liner 30.
As described above, due to the change in the outside air temperature, the above-described problem occurs due to the difference in thermal shrinkage generated between the bumper 33 and the fender liner 30.

  In the present invention, a fender protector that solves the above-described conventional problems, can absorb and prevent problems associated with differences in heat shrinkage, and can permanently maintain the mounting relationship between the bumper and the fender protector. The purpose is to provide.

The object of the present invention can be achieved by the inventions described in claims 1 to 6.
That is, the present invention is a fender protector for attaching a flange portion extending inwardly from the back side of the lower side of the bumper to the panel portion formed at the end portion of the fender protector that covers the wheel in the wheel house,
The panel portion for fixing the flange portion has a support panel for supporting and fixing the flange portion from below, and the support panel is formed to be separated from each other, and two fixing points for fixing the flange portion; A difference absorbing portion that is formed between the two fixing points and absorbs a difference in thermal expansion and contraction in the support panel, and is formed between the difference absorbing portion and each of the fixing points, and engages with the flange portion. An engagement portion,
The main feature is that the engagement state of each engagement portion engaged with the flange portion is an engagement state in which each engagement portion is slidable along the side edge direction of the flange portion. It is said.

The main feature of the present invention is that the support panel is formed in a stepped portion formed in the panel portion.
Furthermore, in this invention, the said difference absorption part has a length dimension along the direction which cross | intersects with the line segment which connects between the said two fixed points, and the recessed part which protruded below from the lower surface side of the said support panel Formed as a groove,
The recessed groove is formed with a free edge of the support panel as a starting point, and has a width dimension equal to or greater than the groove width of the recessed groove at the end of the recessed groove, and penetrates between the front and back surfaces of the panel portion. The main feature is that an opening is formed.

Furthermore, in the present invention, the difference absorbing portion has a length dimension along a direction intersecting with a line segment connecting the two fixed points, and penetrates between the front and back surfaces of the support panel portion. Formed as a pair of slits,
The one slit is formed with a free edge of the support panel as a starting point, and the other slit is substantially parallel to the longitudinal direction of the one slit and in a region away from the free edge of the support panel. The end of the other slit that is farthest from the free edge of the support panel is in communication with the end and has a width dimension that is equal to or greater than the slit width of the other slit, and the panel portion The main feature is that an opening penetrating between both front and back surfaces is formed.

In the present invention, the difference absorbing portion is configured as a pair of thin grooves having a length dimension along a direction intersecting a line segment connecting the two fixed points.
Each of the thin-walled grooves is arranged in parallel to each other and formed within the plate thickness of the support panel, and the one thin-walled groove is formed starting from a free edge of the support panel, A thin groove is formed in a region away from the free edge of the support panel;
The end of the other thin-walled groove farthest from the free end of the support panel has a width dimension equal to or greater than the groove width of the thin-walled groove, and communicates with the same end. The main feature is that an opening penetrating between both surfaces is formed.

Further, in the present invention, the difference absorbing portion has a length dimension along a direction intersecting a line segment connecting the two fixed points, and the thin groove and slit disposed substantially parallel to each other It is composed as a combination of
The thin groove is formed within the thickness of the support panel, and the slit is formed to penetrate between the front and back surfaces of the support panel, and the thin groove or the slit is the support panel. The slit or the groove with the thin wall is formed in a region away from the free edge of the support panel.
An end portion farthest from the free end of the support panel in the slit or the groove with a thin wall formed in a region away from the free edge of the support panel communicates with the same end portion. It has a width dimension equal to or larger than the slit width of the slit having the above or the groove width of the thin-walled groove, and is characterized in that an opening penetrating between the front and back surfaces of the panel portion is formed.

In the fender protector according to the present invention, even if the bumper is fixed at the fixing point of the support panel, the difference in thermal shrinkage that occurs between the fender protector and the bumper is deformed by the difference absorbing portion extending or contracting. Can be absorbed. In addition, each engagement portion can slide along the side edge direction of the flange portion while maintaining the engagement state with the flange portion. As a result, even if the expansion or contraction that occurs between the fender protector's fixed points occurs due to the temperature change of the outside air that acts on the fender protector, the fender protector is removed from the bumper by each engaging part along with the absorption at the differential absorbing part. It can prevent drooping.

  Moreover, the shrinkage | contraction which generate | occur | produces between the fixing points of a fender protector at low temperature can be absorbed when a difference absorption part spreads. And it can reduce that tensile force will increase in a fixed point.

  As a structure of a difference absorption part, it can form as a recessed groove which protruded below from the lower surface side of the support panel. And as a structure of a recessed part groove | channel, it is set as the structure which had the length dimension along the direction which cross | intersects with respect to the line segment which ties between two fixed points, formed the free edge of a support panel as a starting point, At the terminal end, an opening having a width dimension equal to or larger than the groove width of the recessed groove and penetrating between the front and back surfaces of the panel portion can be formed.

  By configuring the difference absorbing portion in this manner, it is possible to efficiently absorb the expansion and contraction between the fixing points of the fender protector due to the temperature change by the deformation of the concave groove. In addition, since the opening is formed at the end of the recessed groove, the behavior in the recessed groove can be easily performed. That is, if the opening is not formed, the end side of the recessed groove is connected to the flange portion of the fender protector, but by forming the opening, the end side of the recessed groove becomes free and the end side It becomes easy to perform the behavior.

  As the configuration of the difference absorbing portion, a configuration using a pair of slits, a configuration using a pair of thin grooves, or a configuration combining a slit and a thin groove can be adopted. The slit or the groove with thin wall has a length dimension along the direction intersecting the line connecting the two fixed points, and one slit or the groove with thin wall starts from the free edge of the support panel. The other thin groove or slit can be formed in a region away from the free edge of the support panel.

  Then, the end of the other thin groove or slit formed in the region away from the free edge of the support panel has a width dimension equal to or greater than the groove width of the thin groove having the same end or the slit width of the slit. And an opening penetrating between the front and back surfaces of the panel portion can be formed.

  Thus, by comprising, the thermal expansion-contraction of the fender protector accompanying a temperature change can be efficiently absorbed by the difference absorption part. In addition, the slits or thin grooves formed in the region away from the free edge of the support panel can be efficiently thermally deformed by the openings penetrating the front and back surfaces of the panel portion.

It is a perspective view of a fender protector. (Example 1) It is a top view of the panel part which fixed the flange part. (Example 1) It is a principal part perspective view of the panel part which fixed the flange part. (Example 1) It is a deformation | transformation figure of a difference absorption part. (Example 2) It is a deformation | transformation figure of a difference absorption part. (Example 2) It is another modification of a level | step difference absorption part. (Example 3) It is another modification of a level | step difference absorption part. (Example 3) It is VIII-VIII sectional drawing of FIG. (Example 1) It is VIII-VIII sectional drawing of FIG. 2 when a flange part heat-shrinks. (Example 1) It is VIII-VIII sectional drawing of FIG. 2 when a flange part is thermally extended. (Example 1) It is XI-XI sectional drawing of FIG. (Example 1) It is explanatory drawing when a flange part is thermally extended. (Conventional example) It is a perspective view of a bumper and a fender liner. (Conventional example 1) It is another perspective view of a bumper and a fender liner. (Conventional example 1)

  Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. The fender protector according to the present invention will be described below by taking the configuration of the fender protector for the front wheel as an example, but the fender protector according to the present invention is not limited to the fender protector for the front wheel. Also, it can be suitably applied as a fender protector for the rear wheel. For this reason, this invention is not limited to the Example demonstrated below, A various change is possible.

As shown in FIG. 1, a panel portion 2a having a substantially fan-shaped planar shape is formed at the front end portion of the fender protector 2 formed in a substantially semicircular arc shape or a substantially inverted U shape when viewed from the front side. ing. At the rear end portion of the fender protector 2, a rear mounting portion 2b extending in a substantially horizontal shape is configured. The flange portion 1a formed on the bumper 1 (see FIG. 3) can be fixed by the panel portion 2a of the fender protector 2.
The fender protector 2 can be attached to the vehicle body via a rear attachment portion 2b and an attachment member (not shown) formed on the front side of the fender protector 2.

  A support panel 3 for supporting and fixing the flange portion 1a of the bumper 1 from the lower surface side and an extending portion 19 for covering and fixing the flange portion 1a from the upper surface side are formed on the front end side of the panel portion 2a. Yes. Both the support panel 3 and the extending portion 19 are configured as stepped portions extending from the panel portion 2a. In order to improve the strength of the panel portion 2a, a plurality of reinforcing recesses 9 are formed in the panel portion 2a.

  The bumper 1 and the fender protector 2 are each formed by injection molding a synthetic resin. Since the bumper 1 is required to have a performance having rigidity, the bumper 1 is molded to a plate thickness using a synthetic resin material having rigidity properties. Further, since the fender protector 2 is required to have the performance of being elastically deformable, the fender protector 2 is formed into a thin wall shape using a synthetic resin material having the property of being elastically deformable.

  FIG. 3 shows a step 3b formed between the support panel 3 and the panel portion 2a. A support panel 3 is formed extending from the step 3b to the tip side. In the following, the mounting configuration of the bumper 1 and the fender protector 2 will be described using the mounting configuration of the bumper 1 and the fender protector 2 on the left front side of the vehicle, but the bumper 1 and the fender protector 2 on the right front side of the vehicle will be described. This mounting configuration is the same as the mounting configuration of the bumper 1 and the fender protector 2 on the left front side of the illustrated vehicle. Therefore, illustration of the mounting configuration of the bumper 1 and the fender protector 2 on the right front side of the vehicle is omitted.

  As shown in FIGS. 2 and 3, the support panel 3 is formed with a pair of fixing points 7 for fixing the flange portion 1 a of the bumper 1, and the extending portion 19 is provided with the flange portion 1 a of the bumper 1. A fixing point 16 to be fixed is formed. The pair of fixing points 7 and attachment points 16 are formed in a hole shape into which the clip 8 can be inserted, and by inserting the clip 8 between the attachment holes formed in the flange portion 1a, the bumper 1 The flange portion 1a can be fixed to the support panel 3 and the extending portion 19. Instead of using the clip 8 as a fixture for attaching the bumper 1 to the fender protector 2, a fixture such as a screw can be used.

  Between the pair of fixed points 7, a difference absorbing portion 5 that absorbs thermal deformation of the fender protector 2 due to thermal change is formed. In the configuration shown in the first embodiment, the difference absorbing portion 5 is configured as a recessed groove 10 protruding downward from the lower surface of the support panel 3. The recessed groove 10 is formed in a direction intersecting with a line segment connecting the pair of fixed points 7, and is formed as a groove from the free end 3a of the support panel 3 toward the main body side of the panel portion 2a. .

  Between the recessed groove 10 and each fixing point 7, an engaging portion 6 is formed to engage with the flange portion 1a. The engaging portion 6 is erected upward from the support panel 3, and is configured in a substantially inverted L shape in a side view that is refracted forward from the middle of the erected portion. When the engaging portion 6 is formed integrally with the fender protector 2 by injection molding, a protrusion protruding upward from the surface of the mold for molding the inner surface side of the fender protector 2 can be formed. With this protrusion, the engaging portion 6 can be formed simultaneously with the formation of the fender protector 2 on the inverted L-shaped inner surface. Then, after the projection is disposed, the opening 6a disposed on the front side of the engaging portion 6 is formed.

  At the end of the recessed groove 10 that is the end of the recessed groove 10 on the side far from the free end 3a of the support panel 3, an opening 11 that communicates with the end and penetrates the panel portion 2a in the vertical direction is formed. The width of the opening 11 can be formed as a width dimension equal to or larger than the groove width of the recessed groove 10. Formation of the opening 11 can facilitate the behavior at the end of the recessed groove 10 due to thermal deformation. That is, it is possible to prevent the behavior at the end of the concave groove 10 from being restricted by the panel portion 2a, and the concave groove 10 varies in a state substantially independent of the panel portion 2a as a result of thermal deformation. Can do.

  Thereby, the relative displacement between the bumper 1 and the fender protector 2 can be absorbed by the deformation of the concave groove 10 during thermal deformation. That is, as shown in FIG. 8 which is a VIII-VIII sectional view of FIG. 2, the support panel 3 in the normal temperature state fixes the flange portion 1 a via the clip 8 at each fixing point 7. The flange portion 1a is sandwiched by the engaging portion 6.

  When the temperature of the outside air changes from this state to a high temperature state, as shown in FIG. 9, the fender protector 2 has a higher thermal expansion rate with respect to the temperature than the bumper 1, and therefore, a pair of fixing points 7 fixed by the clip 8 are used. In the meantime, compared to the bumper 1, the hound protector 2 will increase significantly. At this time, as shown in FIG. 12 (a), if the concave groove 10 as the difference absorbing portion 5 is not formed between the pair of fixed points 7, as shown in FIG. 12 (b). Since the extension of the fender protector 2 between the pair of fixed points 7 cannot be absorbed, the fender protector 2 hangs down.

  On the other hand, in the present invention, since the recessed groove 10 which is the difference absorbing portion 5 is formed between the pair of fixed points 7, even when the temperature of the outside air is in a high temperature state, FIG. As shown in FIG. 5, the fender protector 2 can be prevented from drooping downward by deforming the concave groove 10 in the direction in which the groove width of the concave groove 10 becomes narrower.

  When the temperature of the outside air becomes a low temperature state, in the configuration shown in FIG. 12A, the heat shrinkage rate of the bumper 1 is smaller than the heat shrinkage rate of the fender protector 2, so that the pair of fixing points 7 While the distance between the two is not so narrow, the fender protector 2 tends to be greatly reduced. Therefore, a tensile force acts on the fender protector 2 by the clips 8 inserted into the pair of fixing points 7.

Due to the action of the tensile force, the attachment holes at the respective fixing points 7 of the fender protector 2 in which the clip 8 is inserted are greatly expanded. After that, when the temperature change of the outside air is repeated and the fender protector 2 expands and contracts, the diameter of the mounting hole at the pair of fixing points 7 remains larger as time passes, and at the fixing point 7 The periphery of the mounting hole becomes cloudy and becomes brittle. In such a state, the fender protector 2 comes off the clip 8.

  On the other hand, in the present invention, a recessed groove 10 that is the difference absorbing portion 5 is formed between the pair of fixed points 7. Therefore, even when a tensile force is applied to the fender protector 2 by the clips 8 inserted into the pair of fixing points 7 when the temperature of the outside air is low, as shown in FIG. The concave groove 10 can be deformed in the direction of widening the groove width. Due to the deformation of the concave groove 10, the tensile force acting on the fender protector 2 can be absorbed.

  Moreover, in the present invention, as shown in FIG. 11, the engaging portion 6 is engaged with the flange portion 1a of the bumper 1, but it can slide on the flange portion 1a in accordance with the expansion and contraction of the fender protector 2. Engagement is possible. Therefore, even if the extension of the fender protector 2 cannot be completely absorbed by the deformation of the recess groove 10, the engaging portion can slide on the flange portion 1a without hindering the expansion and contraction of the fender protector 2. 6 can prevent the fender protector 2 from hanging down.

  As described above, in the fender protector 2 of the present invention, it is possible to absorb and prevent the problems associated with the difference in thermal shrinkage generated between the bumper 1 and the fender protector 2. As a result, the mounting relationship between the bumper 1 and the fender protector 2 can be maintained permanently.

  The other structure regarding the difference absorption part 5 of the fender protector 2 concerning this invention is demonstrated using FIG. 4, FIG. Also in the second embodiment, the difference absorbing portion 5 is configured as recessed grooves 20 to 22 that protrude downward from the lower surface of the support panel 3 as in the first embodiment. The recessed groove 10 in the first embodiment is configured to have substantially the same groove width over the length direction of the groove, but the recessed groove 20 shown in FIG. A groove width on one end side of a certain recessed groove 20 is widened, and the groove width is gradually reduced toward the other end side of the recessed groove 20.

  Further, the recess grooves 21 shown in FIG. 5A are formed in two rows in parallel. Although FIG. 5A shows a configuration in which two rows of concave grooves 21 are formed in parallel, the number of concave grooves 21 is not limited to two, and is configured as a plurality of rows of two or more. You can also keep it.

  The groove width shape extending in the length direction of the recessed groove 21 may be configured in a shape having substantially the same groove width in the length direction of the recessed groove 21. Further, the groove width on one end side of the recessed groove 21 that is the free end 3a side of the support panel 3 is configured to be wide, and the groove width is configured to gradually decrease toward the other end side of the recessed groove 21. it can.

  In the concave groove 22 shown in FIG. 5B, the cross-sectional shape of the bottom of the concave groove 22, that is, the portion bent at the center of the concave groove is not a substantially semicircular arc shape as in the first embodiment. It is configured in a substantially V-shape. The groove width shape extending along the length direction of the recessed groove 22 may be configured to have a shape having substantially the same groove width along the length direction of the recessed groove 22. Further, the groove width on one end side of the recessed groove 22 on the free end 3a side of the support panel 3 is configured to be wide, and the groove width may be configured to gradually decrease toward the other end side of the recessed groove 22. it can.

The configuration other than the configuration of the difference absorbing unit 5 in the second embodiment can be the same as the configuration of the first embodiment. Therefore, about the structure similar to Example 1, the description about the member is abbreviate | omitted by using the member code | symbol used in Example 1. FIG.

In Example 2, since the recessed groove 20 is formed as shown in FIG. 4, when the support panel 3 is thermally contracted, the support panel 3 is expanded or closed in a substantially fan shape as the heat shrinks. Will be shown. In the present invention, as the groove width shape of the recessed groove 20, the groove width on the one end side of the recessed groove 20 on the free end 3a side of the support panel 3 is formed wide, and the groove width increases toward the other end side of the recessed groove 20 It is formed so as to gradually decrease. Therefore, the deformation of the recessed groove 20 can follow the substantially fan-like behavior of the support panel 3.
Thus, the fender protector 2 of the present invention can be suitably applied to the bumper 1 (see FIG. 3) that uses a large number of curved surfaces as the outer surface shape.

  By forming the recessed grooves 21 in a plurality of rows as shown in FIG. 5A, the amount of protrusion downward of the recessed grooves 21 at room temperature can be kept low. When the support panel 3 undergoes heat shrinkage, the recess groove 21 can sufficiently absorb the deformation of the support panel 3.

  By forming the recessed groove 22 in a substantially V shape as shown in FIG. 5B, the recessed groove 22 is easily deformed around the substantially V-shaped bottom when the support panel 3 is thermally contracted. Therefore, the responsiveness when the concave groove 22 is deformed can be improved.

  6 and 7, another configuration relating to the difference absorbing portion 5 of the fender protector 2 according to the present invention will be described. In the third embodiment, as the configuration of the difference absorbing portion, as shown in FIG. 6, a configuration using a pair of slits 14a and 14b, or a combination of the slit 14 and the thin groove 17 as shown in FIG. ing. 7 shows an example in which the slit 14 and the thin-walled groove 17 are combined. However, instead of the slit 14 in FIG. 7, a thin-walled groove 17 is formed to form a pair of thin-walled grooves. It can also be set as the structure used.

  The slits 14, 14a, 14b and the thin-walled groove 17 are each formed in a direction intersecting with a line segment connecting the pair of fixed points 7 shown in FIG. Desirably, it is desirable to form the slits 14, 14a, 14b and the thin grooved groove 17 in a direction orthogonal to a line segment connecting the pair of fixed points 7.

  The configuration other than the configuration of the difference absorbing unit in the third embodiment can be the same as the configuration of the first embodiment. Therefore, about the structure similar to Example 1, the description about the member is abbreviate | omitted by using the member code | symbol used in Example 1. FIG.

  As shown in FIG. 6, among the pair of slits 14a and 14b, the slit 14a formed from the free end 3a side of the support panel 3 toward the panel portion 2a gradually decreases in width toward the back of the slit 14a. It is formed in the shape to do. The slit 14b is formed substantially parallel to the slit 14a, and is formed in a region of the support panel 3 that does not include the free end 3a of the support panel 3.

  At the end of the slit 14b farthest from the free end 3a side of the support panel 3, an opening 15 communicating with the end is formed in the panel 2a. The opening 15 is formed in a shape penetrating in the front and back direction of the panel portion 2a, and the width dimension of the opening 15 is formed to be larger than the width dimension of the slit 14b.

The slit 14b is formed in a shape having the same slit width along the length direction of the slit 14b, but may be formed so that the slit width gradually becomes wider toward the opening 15 side.
By forming the opening 15, when the support panel 3 is thermally deformed, it is possible to configure the slit 14 b to easily behave at the end on the opening 15 side.

  As the shape of the slit width of the slit 14a, the slit width can be formed as the same slit width instead of being configured to gradually decrease as it goes deeper as shown in FIG.

  As the support panel 3 shrinks, the support panel 3 behaves like a fan that expands or closes, but the slit 14a has a wide slit width on the free end 3a side of the support panel 3. Thus, the slit 14a can follow the substantially fan-like behavior of the support panel 3.

  7 is configured as a thin-walled groove 17 instead of the slit 14a formed as a slit in FIG. That is, the thin portion 17a is provided on the lower surface side of the slit 14a. The other configuration is the same as the configuration shown in FIG. Therefore, the function as the difference absorbing unit shown in FIG. 7 can exhibit the same operation as described with reference to FIG.

  The technical idea of the present invention can be applied as a fixed configuration between members with different thermal deformations.

1 ... Bumper,
1a: flange part,
2 ... Fender protector,
2a ... Panel part,
3 ... support panel,
5 ... difference absorption part,
6 ... engaging part,
6a ... opening,
7: Fixed point,
10, 20, 21, 22 ... concave groove,
11 ... opening,
14, 14a, 14b ... slits,
15 ... opening,
17 ... Thin groove,
30 ... fender liner,
31 ... concave part,
33 ... Bumper,
34 ... lower flange,
35 ... ribs,
38 ... Step part,
39 ... notch,
40: Panel portion.

Claims (6)

A fender protector for attaching a flange portion extending inwardly from the back surface of the lower side of the bumper to the panel portion formed at the end of the fender protector that covers the wheel in the wheel house,
The panel portion for fixing the flange portion has a support panel for supporting and fixing the flange portion from below;
The support panel is formed to be spaced apart, the two fixing points that fix the flange portion, the difference absorbing portion that is formed between the two fixing points and absorbs the difference in thermal expansion and contraction in the support panel, An engagement portion that is formed between the difference absorbing portion and each of the fixing points, and engages with the flange portion,
The fender wherein the engagement state of the engagement portions engaged with the flange portion is an engagement state in which the engagement portions are slidable along the side edge direction of the flange portion. Protector.   The fender protector according to claim 1, wherein the support panel is formed in a stepped portion formed in the panel portion. The difference absorbing portion has a length dimension along a direction intersecting a line segment connecting the two fixed points, and is formed as a recessed groove protruding downward from the lower surface side of the support panel. ,
The recessed groove is formed with a free edge of the support panel as a starting point, and has a width dimension equal to or greater than the groove width of the recessed groove at the end of the recessed groove, and penetrates between the front and back surfaces of the panel portion. The fender protector according to claim 1 or 2, wherein an opening is formed. The difference absorbing portion has a length dimension along a direction intersecting a line segment connecting the two fixed points, and is formed as a pair of slits penetrating between the front and back surfaces of the support panel portion. Become
The one slit is formed with a free edge of the support panel as a starting point, and the other slit is substantially parallel to the longitudinal direction of the one slit and in a region away from the free edge of the support panel. Formed,
The end of the other slit that is farthest from the free edge of the support panel communicates with the end and has a width dimension that is equal to or greater than the slit width of the other slit. The fender protector according to claim 1, wherein an opening penetrating the gap is formed. The difference absorbing portion is configured as a pair of thin grooves having a length dimension along a direction intersecting a line segment connecting the two fixed points,
The thin-walled grooves are arranged in parallel to each other and formed within the thickness of the support panel, and the one thin-walled groove is formed starting from the free edge of the support panel,
The other thin groove is formed in a region away from the free edge of the support panel;
The end of the other thin-walled groove farthest from the free end of the support panel has a width dimension equal to or greater than the groove width of the thin-walled groove, and communicates with the same end. The fender protector according to claim 1 or 2, wherein an opening penetrating between both surfaces is formed. The difference absorbing portion has a length dimension along a direction intersecting a line segment connecting the two fixed points, and is configured as a combination of a thin-walled groove and a slit arranged substantially parallel to each other. Become
The thin-walled groove is formed in the thickness of the support panel, and the slit is formed to penetrate between the front and back surfaces of the support panel portion,
The thin groove or slit is formed starting from the free edge of the support panel,
The slit or the groove with the thin wall is formed in a region away from a free edge of the support panel;
An end portion farthest from the free end of the support panel in the slit or the groove with a thin wall formed in a region away from the free edge of the support panel communicates with the same end portion. 3. The opening according to claim 1, wherein the opening has a width dimension equal to or greater than a slit width of the slit having a thickness or a groove width of the thin-walled groove, and penetrates between both front and back surfaces of the panel portion. Fender protector.

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