JP2011011605A - Automobile cowl grill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automobile cowl grill effectively preventing occurrence of abnormal sound between the cowl grill and a windshield.SOLUTION: The cowl grill 10 includes a molding section 11 covering an upper par of the front edge of the windshield 5; and a support claw 12 for supporting from below the front edge of the windshield 5. The cowl grill is disposed between the front edge of the windshield 5 and the rear edge of a hood 6. At least a portion of the support claw 12 which is brought into pressure contact with the lower surface of the windshield 5 is constituted by a pressure contact member 13 composed of a separate member having a lower coefficient of friction than a cowl grill body 10A.

Description

  The present invention relates to a cowl grill disposed between a front edge portion of an automobile windshield and a rear edge portion of a bonnet.

  A cowl grill is provided between the front edge of the windshield of the automobile and the rear edge of the bonnet so as to close the gap between the two. The rear edge of the cowl grille is provided with a molding that covers the upper front edge of the windshield over almost the entire width in the car width direction, and support claws that support the front edge of the windshield from the lower side are set in the car width direction. Provided at intervals, the front edge portion of the windshield is configured to be held between the molding portion of the cowl grille and the support claw.

  By the way, although the support claw is pressed against the lower surface of the front edge of the windshield, there is a problem that abnormal noise is generated due to vibration of the engine or vibration from the road surface during traveling, which causes discomfort to the user. .

  Therefore, in order to prevent the generation of such abnormal noise, an elastic piece made of another member pressed against the lower surface of the windshield is attached to the support claw to follow the engine vibration and vibration from the road surface during traveling. The elastic piece is configured to be elastically deformed, and the support claw is slightly separated from the lower surface of the windshield by the vibration, and the generation of noise due to being hit against the lower surface of the windshield by the elasticity of the material is prevented. A windshield mounting structure configured as described above has also been proposed (see, for example, Patent Document 1).

JP 2009-83593 A

  By the way, as a result of various tests to prevent the generation of noise between the windshield and the cowl grill, the present inventor has also found that the support claws are struck against the lower surface of the windshield as described in Patent Document 1. In addition to the above, the present inventors have found that there are chattering noises and rubbing noises caused by stick-slip phenomenon during relative movement in the contact surface direction between the support claws and the windshield.

  An object of the present invention is to provide a cowl grill of an automobile that can effectively prevent the generation of noise from the windshield.

  A cowl grill of an automobile according to the present invention has a molding part that covers the upper front edge of the windshield, and a support claw that supports the front edge of the windshield from the lower side, and the front edge of the windshield and the hood A cowl grill disposed between the rear edges, wherein at least a portion of the support claw that is in pressure contact with the lower surface of the windshield is formed of a pressure contact member made of another member having a lower coefficient of friction than the cowl grill main body. Is.

  In this cowl grill, a part of the load on the windshield is supported by the support claws, but at least the portion of the support claws that is pressed against the lower surface of the windshield has a lower friction coefficient than the cowl grill body. Consisting of a separate pressure member, the support pawl can slide smoothly against the windshield, effectively preventing chattering and rubbing due to stick-slip between the windshield and the support pawl. In addition, it is possible to effectively prevent abnormal noise between the cowl grill and the windshield. In addition, since the pressure contact member is made of a member separate from the cowl grill body, the cowl grill body is made of a synthetic resin material such as a polyolefin-based synthetic resin material, particularly rubber-containing polypropylene or talc-added polypropylene. The generation of abnormal noise can be prevented without deteriorating the environmental resistance and mechanical properties of the cowl grill body.

  In a preferred embodiment, the pressure contact member is made of a synthetic resin material selected from polyacetal, polyamide, polyethylene, polytetrafluoroethylene, and tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer. By constructing the pressure contact member with such a synthetic resin material, the friction coefficient of the pressure contact member is set low, the slip on the lower surface of the windshield is improved, and the chatter noise caused by the stick-slip phenomenon between the windshield and the support claw And the generation of rubbing noise can be effectively prevented.

  In a preferred embodiment, the friction coefficient of the pressure contact member is 0.5 or less. By setting the friction coefficient of the pressure contact member to such a value, the sliding against the lower surface of the windshield is improved, and the occurrence of chattering and rubbing noise due to the stick-slip phenomenon between the windshield and the support claw is effectively generated. Since it can prevent, it is preferable. The friction coefficient of the pressure contact member is preferably set as low as possible, and more preferably set to 0.2 or less.

  It is also preferable that the pressure contact member is made of any one of a material having a small difference between a static friction coefficient and a dynamic friction coefficient, an abrasion resistant material, a self-lubricating material, a high-speed slipping material, and a material that does not generate frictional noise and vibration. It is a form. By setting the physical properties of the pressure contact member in this way, it is preferable because the sliding with respect to the lower surface of the windshield is improved and the occurrence of chattering noise and rubbing noise due to stick-slip phenomenon between the windshield and the supporting claws can be effectively prevented. .

  It is a preferred embodiment that an attachment portion to which a pressure contact member is fitted and fixed is formed on the cowl grill body, and a support claw is constituted by the pressure contact member and the attachment portion. As described above, when the press contact member is mechanically fixed to the cowl grill by fitting and fixing, the press contact member can be securely and securely attached to the cowl grill.

  According to the cowl grill of the automobile according to the present invention, a part of the load of the windshield is supported by the support claws, and at least a portion of the support claws that is pressed against the lower surface of the windshield is the cowl grill. Consists of a pressure contact member made of another member with a lower friction coefficient than the main body, and the support claws can slide smoothly with respect to the windshield, such as chatter noise and rubbing noise due to stick-slip phenomenon between the windshield and the support claws Generation | occurrence | production can be prevented effectively and generation | occurrence | production of the noise between a cowl grill and a windshield can be prevented effectively. In addition, since the pressure contact member is made of a member separate from the cowl grill body, the cowl grill body is made of a synthetic resin material such as a polyolefin-based synthetic resin material, particularly rubber-containing polypropylene or talc-added polypropylene. The generation of abnormal noise can be prevented without deteriorating the environmental resistance and mechanical properties of the cowl grill body.

Vertical section of a car near the cowl grill Cowl grill perspective view (A) of the support claw and the pressure contact member is a perspective view, (b) is a perspective view, (c) is a sectional view taken along line III-III in (a) (A) of other supporting claws and pressure contact members is a perspective view, (b) is a perspective view, (c) is a sectional view taken along line IV-IV in (a). (A) of other support claws and pressure contact members is a perspective view, (b) is a perspective view, (c) is a cross-sectional view taken along line VV of (a).

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the present embodiment, description will be made by defining front / rear / left / right with reference to front / rear / left / right of the vehicle.
As shown in FIG. 1, a dash panel (dash lower panel) 3 extending in the vertical direction is provided over the entire width of the vehicle body at the boundary between the engine room 1 and the vehicle compartment 2 of the automobile. Is partitioned by a dash panel 3. A dash upper panel 4 having a closed cross-section extending over substantially the entire width of the vehicle body is joined to the upper end portion of the dash panel 3. The dash upper panel 4 has a closed cross section formed by a front panel 4A and a rear panel 4B. An opening 4a is formed at an appropriate position for adjusting the rigidity, and the front edge of the windshield 5 is a dash upper panel. 4 is supported at the upper end of the body.

  A cowl front panel 7 extending to the lower side of the rear end portion of the bonnet 6 is connected to the lower end portion of the dash upper panel 4. The cowl front panel 7 extends substantially horizontally from the lower end portion of the dash upper panel 4 to the front. After that, it includes a main body portion 7a extending obliquely toward the upper front oblique side, and a flange portion 7b extending forward from the front end upper portion of the main body portion 7a, and is provided over substantially the entire width of the vehicle body. The cowl front panel 7 and the dash upper panel 4 form a bottomed cowl space S extending in the vehicle width direction, and rainwater or the like introduced into the cowl space S is discharged from the cowl space S toward the road surface. It is configured as follows.

  Above the cowl front panel 7, a cowl grill 10 is provided over substantially the entire width of the vehicle body. As shown in FIGS. 1 to 3, the cowl grill 10 includes a molding part 11 that covers the upper part of the front edge of the windshield 5 and a support claw 12 that supports the front edge part of the windshield 5 from below. The portion of the support claw 12 that is disposed between the front edge portion of the windshield 5 and the rear edge portion of the bonnet 6 and is pressed against at least the lower surface of the windshield 5 has a lower friction coefficient than the cowl grill body 10A. The mounting portion 14 is formed of the member 13 and the press contact member 13 is fitted and fixed to the lower surface side of the cowl grill main body 10A, and the support pawl 12 is configured by the press contact member 13 and the mounting portion 14.

  A flat molding 11 covering the upper front edge of the windshield 5 is formed at the upper rear edge of the cowl grill 10, and a substantially L-shape for supporting the front edge of the windshield 5 from the lower side at the lower rear edge. The support claws 12 are formed at set intervals, and the front edge portion of the windshield 5 is held between the molding portion 11 and the support claws 12. Although the number of support claws 12 is set to nine in this embodiment, it can be set to any number other than nine.

  An inverted V-shaped projecting portion 15 is formed in the vehicle width direction in the middle portion of the cowl grill main body 10A in the front-rear direction, and a large number of penetrations are formed in the front inclined portion of the projecting portion 15 and the front portion of the inclined portion. A grill portion 16 formed with holes is formed, and the air for air conditioning can be introduced into the cowl space S through the grill portion 16.

  In the cowl grill main body 10 </ b> A, a dam portion 17 that is raised by one step is formed on the front side of the protruding portion 15, and a groove portion 18 is formed between the protruding portion 15 and the dam portion 17. A seal member (not shown) is attached to the upper surface of the dam portion 17, and the bonnet reinforcement 6 a on the back side of the bonnet 6 is pressed against the seal member in the engine room 1 with the bonnet 6 closed. Intrusion of rainwater, etc. is prevented.

  The rear edge of the bonnet 6 is disposed slightly behind the vehicle body from the top of the protrusion 15 to prevent intrusion of rainwater and foreign matter to the front of the protrusion 15, and a slit 17 a is formed at the front edge of the dam 17. Has been.

  A flat flange portion 19 is formed at the rear edge of the cowl grill main body 10A, and the flange portion 19 of the cowl grill main body 10A is overlapped on the upper side of the flange portion 7b of the cowl front panel 7 to fix a fastener or the like. 20.

  The cowl grill main body 10A can be configured as an integral member continuous in the vehicle width direction, or can be divided into two or more divided bodies by being divided in the middle in the vehicle width direction. . In the case of the division configuration, it is possible to adopt a small mold as a mold for forming the cowl grill main body 10A, which is preferable because the manufacturing cost of the cowl grill 10 can be reduced. As the synthetic resin material constituting the cowl grill main body 10A, polyolefin-based synthetic resin materials, particularly rubber-containing polypropylene and talc-added polypropylene can be suitably employed in consideration of environmental resistance and mechanical strength.

  The support claw 12 includes an attachment portion 14 formed integrally with the cowl grill main body 10 </ b> A, and a pressure contact member 13 that is mechanically fitted and fixed to the attachment portion 14 and pressed against the lower surface of the windshield 5. Yes. The pressure contact member 13 is made of a material having a lower coefficient of friction than the cowl grill main body 10A, and is configured as a separate member from the cowl grill main body 10A. Even if the windshield 5 and the pressure contact member 13 move relative to each other due to vibrations from the road surface, it is possible to effectively prevent the occurrence of chattering noise or rubbing noise due to a stick-slip phenomenon between the windshield 5 and the support claw 12. It is configured.

  Examples of the synthetic resin material constituting the pressure contact member 13 include polyacetal (POM), polyamide (PA), polyethylene (PE), polytetrafluoroethylene (PTFE), and tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA). Any synthetic resin material can be employed. In addition, polyacetals and polyamides can be suitably employed to which a lubricant such as a solid lubricant or a lubricating oil is added, and fluorine-based resins are generally preferred because they have a small stick-slip phenomenon. Examples of the solid lubricant include fluororesin powder, polyethylene powder, graphite, and molybdenum disulfide. Examples of the lubricant include machine oil and silicone oil. The friction coefficient of the pressure contact member 13 is preferably set as low as possible in order to effectively prevent a rubbing sound with the windshield 5, and is set to 0.5 or less, preferably 0.2 or less. Generally, among synthetic resin materials used for mechanical parts with sliding under light load conditions, polyacetal (POM), polyamide (PA), polyethylene (PE), polytetrafluoroethylene (PTFE), tetrafluoroethylene par Since the fluoroalkyl vinyl ether copolymer (PFA) has a low friction coefficient and has a self-lubricating property, the friction coefficient with the windshield can be set to 0.5 or less. In addition, since such a material has a low coefficient of friction and a small difference between the dynamic coefficient of friction and the coefficient of static friction, it does not cause stick-slip phenomenon. Generation of sound can be suppressed. Furthermore, since these materials have high wear resistance, durability as a member can be enhanced.

  The attachment structure 30 of the pressure contact member 13 with respect to the attachment part 14 can employ any attachment structure as long as the attachment structure 30 can be firmly fixed so that they do not move relative to each other. However, it is possible to attach with a screw or an adhesive or the like, and it is possible to provide the press contact member 13 integrally with the cowl grill main body 10A by two-color molding when molding the cowl grill main body 10A. Since it becomes complicated and the manufacturing cost becomes high, it is preferable to attach by a mechanical fitting structure.

  As the attachment structure 30 of the pressure contact member 13, the attachment structures 30A to 30C having the following mechanical fitting structure can be suitably employed. However, it is also possible to employ a mounting structure other than that illustrated.

(1) The first mounting structure 30A will be described. As shown in FIG. 3, as a mounting portion 14 formed integrally with the cowl grill main body 10A, a base 31 extending downward from the cowl grill main body 10A, and a base 31 A mounting portion 14 </ b> A having a support portion 32 extending rearward from the lower end of each of the two and a notch portion 33 formed at both lower portions of the support portion 32 is provided. Further, as the pressure contact member 13 which is a member different from the cowl grill main body 10 </ b> A, an elongated rectangular flat plate portion 35, a pair of arm portions 36 extending downward from both ends of the flat plate portion 35, and lower ends of both arm portions 36 A pressing member 13A having a U-shaped cross section having a claw portion 37 protruding inward from the portion is provided.

  The pressure contact member 13A is fitted to the support portion 32 from above so that the arm portion 36 is disposed on both sides of the support portion 32, and the claw portion 37 is engaged with the notch portion 33 of the support portion 32. The fixing portion 14A is fixed so as not to move relative to the mounting portion 14A. The cowl grill 10 is assembled to the vehicle body with the pressure contact member 13A fixed to the attachment portion 14A and the support claws 12 assembled, and the lower surface of the front edge portion of the windshield 5 is the pressure contact member in the state assembled to the vehicle body. The front edge portion of the windshield 5 is held between the molding portion 11 and the support claw 12 of the cowl grill 10 by being slidably pressed against the upper surface of the flat plate portion 35 of 13A.

(2) The second mounting structure 30B will be described. As shown in FIG. 4, as the mounting portion 14 formed integrally with the cowl grill main body 10A, a base 41 extending downward from the cowl grill 10 and a base 41 There is provided a mounting portion 14B having a support portion 42 extending rearward from the lower end portion, and a side-view inverted T-shaped cutout portion 43 extending over the upper portion and one side portion of the support portion 42. Further, as the pressure contact member 13 which is a member different from the cowl grill main body 10 </ b> A, a flat plate portion 45 having a square shape or a circular shape, a leg portion 46 extending downward from a central portion of the flat plate portion 45, and a lower end portion of the leg portion 46. A press-contact member 13B having a U-shaped cross section having a locking portion 47 extending from the front to the front and rear sides is provided.

  The pressure contact member 13B is configured such that the leg portion 46 and the locking portion 47 are fitted to the cutout portion 43 of the support portion 42 from the side so that the flat plate portion 45 is disposed on the upper side, and the locking portion 47 and the flat plate portion 45 are interposed. By clamping the upper part of the support part 42, it is fixed so that it cannot move relative to the attachment part 14B. The cowl grill 10 is assembled to the vehicle body in a state where the pressure contact member 13B is fixed to the mounting portion 14B and the support claws 12 are assembled, and the lower surface of the front edge portion of the windshield 5 is the pressure contact member in a state assembled to the vehicle body. The front edge portion of the windshield 5 is held between the molding portion 11 and the support claw 12 of the cowl grill 10 by being slidably pressed against the upper surface of the flat plate portion 45 of 13B.

(3) The third mounting structure 30C will be described. As shown in FIG. 5, as the mounting portion 14 formed integrally with the cowl grill main body 10A, a base 51 extending downward from the cowl grill main body 10A, and a base 51 A flat plate-like vertical wall portion 52 provided on the rear surface, a square hole-like locking hole 53 disposed on both upper and lower sides of the vertical wall portion 52, and a positioning hole 54 formed of a round hole provided between the both locking holes 53; A mounting portion 14 </ b> C is formed. Further, as the pressure contact member 13, which is a separate member from the cowl grill main body 10 </ b> A, a support part 55 extending to the lower side of the windshield 5, a fixing part 56 provided at the base part of the support part 55, and protruding forward from the fixing part 56 A pressing member 13 </ b> C having a substantially L shape in side view is provided having a pair of upper and lower claw portions 57 provided in a shape, and a positioning pin 58 provided in a protruding manner on the fixed portion 56 between the two claw portions 57. Yes.

  The pressing member 13 </ b> C has the upper and lower claw portions 57 fitted in the locking holes 53 of the vertical wall portion 52 of the attachment portion 14, and the positioning pin 58 is fitted in the positioning hole 54, so that the fixing portion 56 is attached to the attachment portion. By being superimposed on the vertical wall portion 52 of 14C, it is fixed so as not to move relative to the mounting portion 14C. The cowl grill 10 is assembled to the vehicle body in a state where the pressure contact member 13C is fixed to the mounting portion 14C and the support claws 12 are assembled. In the state where the cowl grille 10 is assembled to the vehicle body, the lower surface of the front edge portion of the windshield 5 is the pressure contact member 13C. The front edge portion of the windshield 5 is held between the molding portion 11 and the support claws 12 of the cowl grill 10 by being slidably pressed against the upper surface of the support portion 55.

DESCRIPTION OF SYMBOLS 1 Engine compartment 2 Car compartment 3 Dash panel 4 Dash upper panel 4A Front panel 4B Rear panel 4a Opening part 5 Front glass 6 Bonnet 6a Bonnet reinforcement 7 Cowl front panel 7a Body part 7b Flange part 10 Cowl grill 10A Cowl grill body 11 Mall Part 12 Supporting claw 13 Pressure member 14 Mounting part 15 Projection part 16 Grill part 17 Dam part 17a Slit 18 Groove part 19 Flange part 20 Fixing tool 30 Mounting structure 13A Pressure contact member 14A Mounting part 30A Mounting structure 31 Base 32 Support part 33 Notch part 35 Flat part 36 Arm part 37 Claw part 13B Pressure contact member 14B Attachment part 30B Attachment structure 41 Base part 42 Support part 43 Notch part 45 Flat part 46 Leg part 47 Locking part 13C Pressure contact member 14C Attachment part 30C Attachment structure 5 Base 52 vertical wall portion 53 engaging hole 54 positioning hole 55 supporting portion 56 positioning pins S cowl spatially fixed portion 57 claw portion 58

Claims (5)

A cowl grille that has a molding that covers the upper front edge of the windshield and a support claw that supports the front edge of the windshield from below, and is disposed between the front edge of the windshield and the rear edge of the bonnet. Because
A portion of the support claw that is in pressure contact with at least the lower surface of the windshield is configured with a pressure contact member made of another member having a lower coefficient of friction than the cowl grill body.
A cowl grill of an automobile characterized by that.   2. The cowl grill of an automobile according to claim 1, wherein the pressure contact member is made of a synthetic resin material selected from polyacetal, polyamide, polyethylene, polytetrafluoroethylene, and tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer.   The automobile cowl grill according to claim 1 or 2, wherein a friction coefficient of the pressure contact member is 0.5 or less.   The pressure contact member is formed of any one of a material having a small difference between a coefficient of static friction and a coefficient of dynamic friction, a wear-resistant material, a self-lubricating material, a high-speed slipping material, and a material that does not generate frictional noise / friction. 4. The cowl grill of an automobile according to any one of 3 above. The cowl grille for an automobile according to any one of claims 1 to 4, wherein a mounting portion to which a pressure contact member is fitted and fixed is formed on the cowl grill body, and a support claw is constituted by the pressure contact member and the mounting portion.

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