JP2013107607A - Vehicle door structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle door structure capable of enhancing sound insulation effect of sound coming from outside of a vehicle to inside of the vehicle.SOLUTION: An inner weather strip 30 is arranged in a door body 12 liftably supporting a window glass 18 in a front side door 10 to which a door structure 28 for the vehicle is applied. The inner weather strip 30 has a base material part 32 fixed to the upper end of a door inner panel 14 and an elastically deformable seal lip 36 which extends obliquely upward of the vehicle from a longitudinal wall 32A of the window glass 18 side of the base material side 32 and in which a distal end is arranged so as to come into slide contact with the window glass 18. The inner weather strip 30 has a coupling wall 38 coupling between a protruding piece 34 of the upper end of the longitudinal wall 32A and an upper side seal lip 36, and a through-hole (opening) 40 communicating to a closed space S surrounded by a seal lip part 36, a coupling wall 38, and the base material part 32 is formed in the upper side seal lip 36.

Description

  The present invention relates to a vehicle door structure.

  Patent Document 1 below discloses a structure in which an inner weather strip having two seal lips that are in sliding contact with the inner surface of the windshield is provided inside the windshield inside the side door.

JP 2010-149579 A

  According to the above-mentioned Patent Document 1, in order to reduce the sliding resistance of the window glass, it is necessary to reduce the pressing force of the seal lip to the window glass. However, when the pressing force of the seal lip to the window glass is set low, There is a possibility that the sound insulation effect that insulates the sound entering the vehicle interior from the outside of the vehicle is reduced.

  In view of the above facts, an object of the present invention is to provide a vehicle door structure that can enhance the sound insulation effect of sound entering the vehicle interior from the outside of the vehicle.

  According to a first aspect of the present invention, there is provided a vehicle door structure including a door main body that supports a door glass so as to be movable up and down, a base material portion that is attached to an upper end portion of a panel member that constitutes a part of the door main body, and the base material. An elastically deformable seal lip extending from the vertical wall on the door glass side of the door obliquely upward of the vehicle and having a tip slidably contacting the door glass, and provided in the seal member A closed space portion including the seal lip and the vertical wall, and an opening portion provided on a part of the closed space portion excluding the vertical wall and disposed on the door glass side. Is.

  According to a second aspect of the present invention, in the vehicle door structure according to the first aspect, the seal member includes a connecting wall disposed so as to connect the vertical wall and the seal lip, The closed wall is surrounded by three members of the connecting wall and the vertical wall, and the opening that communicates with the closed space is formed in one of the seal lip and the connecting wall. is there.

  According to a third aspect of the present invention, in the vehicle door structure according to the first aspect, the seal member is arranged such that two seal lips are arranged on the upper and lower sides of the vehicle and connect the two upper and lower seal lips. The closed space portion surrounded by four members of the upper and lower two seal lips, the connection wall, and the vertical wall, and the closed space portion is provided on one of the seal lip and the connection wall. The said opening part connected with is formed.

  According to a fourth aspect of the present invention, in the vehicle door structure according to the first or second aspect, the seal member has another seal lip spaced from the seal lip on the side where the opening is formed. It is to be prepared.

  According to a fifth aspect of the present invention, in the vehicle door structure according to the first, second, or fourth aspect, the seal member protrudes from the upper end portion of the vertical wall in the base material portion toward the vehicle upper side. And it has a protrusion part which the end of the said connection wall is connected.

  According to this invention of Claim 1, the door glass is supported so that raising / lowering is possible in the door main body, and the base material part of a sealing member is formed in the upper end part of the panel member which comprises a part of door main body. It is attached. The seal member includes an elastically deformable seal lip extending obliquely upward of the vehicle from the vertical wall on the door glass side of the base material portion, and is arranged so that the tip of the seal lip is in sliding contact with the door glass. Further, the sealing member is provided with a closed space portion including a seal lip and a vertical wall, and an opening portion disposed on the door glass side is provided in a part of the closed space portion excluding the vertical wall. Is provided. This constitutes a spring mass system in which the air in the opening is a mass and the closed space on the side opposite the door glass of the opening is a spring, and when the sound of a specific frequency hits, the air in the opening Vibrates significantly. As a result, the sound energy is changed to vibration energy, and the vibration energy is changed to heat energy by the viscous resistance and friction of air, thereby reducing the sound. For this reason, the sound of a specific frequency can be reduced and the sound insulation effect of the sound which penetrates into a vehicle interior from the outside of a vehicle can be heightened.

  According to the second aspect of the present invention, the seal member is provided with a connecting wall disposed so as to connect the vertical wall on the door glass side of the base material portion and the seal lip. It is set as the closed space part enclosed by three members of a connection wall and a vertical wall. An opening that communicates with the closed space is formed in one of the seal lip and the connecting wall. As a result, a spring mass system in which the air in the opening portion is a mass, and the closed space portion surrounded by the three members of the sealing lip, the connecting wall, and the vertical wall behind the opening portion (opposite the door glass) becomes a spring. When the sound of a specific frequency hits, the air of the opening part will vibrate remarkably. Thereby, the sound of a specific frequency can be reduced and the sound insulation effect of the sound which penetrates into a vehicle interior from the outside of a vehicle can be heightened.

  According to the third aspect of the present invention, the seal member is provided with a connecting wall arranged so as to connect the upper and lower two seal lips, and the upper and lower two seal lips, the connecting wall and the vertical wall are provided. It is set as the closed space part enclosed by four members. An opening that communicates with the closed space is formed in one of the seal lip and the connecting wall. As a result, the air in the opening portion is a mass, and the closed space portion surrounded by the four members of the upper and lower seal lips, the connecting wall, and the vertical wall behind the opening portion (opposite the door glass) becomes a spring. A spring mass system is formed, and when sound of a specific frequency is hit, the air in the opening portion remarkably vibrates. Thereby, the sound of a specific frequency can be reduced and the sound insulation effect of the sound which penetrates into a vehicle interior from the outside of a vehicle can be heightened.

  According to the fourth aspect of the present invention, the seal member is provided with another seal lip spaced from the seal lip on the side where the opening is formed. That is, an opening is disposed between contact portions where the seal lip and the other seal lip contact with the door glass, respectively, and the spring mass system including the seal lip has a spring mass system including the opening and a closed space portion behind the opening. It becomes the connected composition. Thereby, it becomes possible to increase the frequency range in which sound is reduced, and the sound insulation effect can be further enhanced.

  According to the fifth aspect of the present invention, the sealing member is provided with a protruding portion that protrudes from the upper end portion of the vertical wall in the base material portion to the vehicle upper side and that is connected to one end of the connecting wall. A space for arranging the closed space portion communicating with the opening can be secured without increasing the dimension in the width direction. For this reason, it is possible to save space in the vehicle width direction of the vehicle door.

  According to the vehicle door structure of the present invention, it is possible to enhance the sound insulation effect of sound entering the vehicle interior from the outside of the vehicle.

It is a block diagram which shows the vehicle inner side of the front side door to which the vehicle door structure which concerns on 1st Embodiment was applied. It is a longitudinal cross-sectional view which shows the structure of the vehicle door structure along line 2-2 in FIG. It is a perspective view which shows the inner weather strip used for the vehicle door structure which concerns on 1st Embodiment. It is a longitudinal cross-sectional view which shows the structure of the vehicle door structure which concerns on 2nd Embodiment. It is a typical cross-sectional view which shows the through-hole in an inner weather strip, and the closed space connected with a through-hole. It is a figure which shows the spring mass system by the through-hole shown in FIG. 5, and the closed space behind it. It is a graph which shows the relationship between a frequency and the sound reduction effect. It is a graph which shows the relationship between the frequency and the sound reduction effect in the vehicle door structure which concerns on 2nd Embodiment, and the vehicle door structure of a 1st comparative example. It is a graph which shows the relationship between the frequency and the sound reduction effect in the vehicle door structure which concerns on 1st Embodiment, the vehicle door structure which concerns on 2nd Embodiment, and the vehicle door structure of a 1st comparative example. It is a figure which shows typically two seal lips, a through-hole, and closed space of the inner weather strip used for the vehicle door structure which concerns on 1st Embodiment. It is a figure which shows the spring mass system by two seal lips of the inner weather strip used for the vehicle door structure which concerns on 1st Embodiment, a through-hole, and closed space. It is a longitudinal cross-sectional view which shows the structure of the vehicle door structure which concerns on 3rd Embodiment. It is a longitudinal cross-sectional view which shows the structure of the vehicle door structure which concerns on 4th Embodiment. It is a longitudinal cross-sectional view which shows the structure of the vehicle door structure which concerns on 5th Embodiment. It is a longitudinal cross-sectional view which shows the structure of the vehicle door structure which concerns on 6th Embodiment. It is a longitudinal cross-sectional view which shows the structure of the vehicle door structure which concerns on a 1st comparative example. It is a longitudinal cross-sectional view which shows the structure of the vehicle door structure which concerns on a 2nd comparative example.

  Hereinafter, a first embodiment of a vehicle door structure according to the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side.

  FIG. 1 shows a front side door to which a vehicle door structure according to the present embodiment is applied as viewed from the inside of the vehicle. 2 shows a longitudinal sectional view of the front side door taken along line 2-2 in FIG. As shown in these drawings, a front side door 10 as a vehicle door is provided on a side portion (not shown) of the vehicle, and the front side door 10 is a front door provided on a side portion of the vehicle. It is attached to an opening (not shown) so as to be opened and closed. The front side door 10 includes a door main body 12 configured to include a door outer panel (not shown) disposed on the outer side in the vehicle width direction and a door inner panel 14 disposed on the inner side in the vehicle width direction. The edge portion 14B except for the upper edge portion 14A of the door inner panel 14 is integrated with the edge portion other than the upper edge portion of the door outer panel (not shown) by hemming, so that the door inner panel 14 and the door outer panel are integrated. Are formed in a closed cross-sectional structure. The vehicle door structure 28 of the present embodiment is applied to the front side door 10.

  The front side door 10 is inserted into the door body 12 through a gap between the upper edge portion 14A of the door inner panel 14 and the upper edge portion of the door outer panel (not shown), and can be moved up and down in the vehicle vertical direction. Is provided with a window glass (door glass) 18. A door frame 20 for guiding the window glass 18 at the time of ascending / descending is attached to the vehicle upper side of the door body 12 in a gate shape in a side view of the vehicle. That is, the door body 12 supports the window glass 18 disposed inside the door frame 20 in a vehicle side view so as to be opened and closed.

  As shown in FIG. 2, a door inner reinforcement 24 is disposed on the inner side of the upper portion of the door inner panel 14 in the vehicle width direction, and is formed at the upper edge portion 14 </ b> A of the door inner panel 14 and the upper end of the door inner reinforcement 24. The vertical wall portion 24A is joined by welding or the like in a surface contact state. A curved surface-like projecting portion 24B that projects inward in the vehicle width direction is formed at the vehicle vertical direction intermediate portion of the vertical wall portion 24A of the door inner reinforcement 24.

  In the vehicle door structure 28, an inner weather strip 30 as an example of a seal member is attached to a joint portion between the upper edge portion 14 </ b> A of the door inner panel 14 and the vertical wall portion 24 </ b> A of the door inner reinforcement 24. Further, on the inner side of the door body 12 in the vehicle width direction (vehicle compartment 26 side), the vehicle inner side surface of the door inner panel 14 and the door inner reinforcement 24 from the upper end portion of the door inner panel 14, the door inner reinforcement 24 and the inner weather strip 30. A resin door trim 46 is attached so as to cover.

  As shown in FIGS. 2 and 3, the inner weather strip 30 is a long member provided along the vehicle front-rear direction on the upper portion of the door inner panel 14. The inner weather strip 30 includes a base portion 32 having a substantially U-shaped cross section with an opening 31 on the vehicle lower side. That is, the base material portion 32 includes a vertical wall 32A extending along the vehicle vertical direction outward in the vehicle width direction, an upper wall 32B extending inward in the vehicle width direction from the upper portion of the vertical wall 32A, and the vehicle inner side of the upper wall 32B. And a vertical wall 32C extending from the end to the vehicle lower side. The vertical wall 32A disposed on the outer side in the vehicle width direction is disposed so as to face the wind glass 18, and the lower end portion of the vertical wall 32A is lower than the lower end portion of the vertical wall 32C disposed on the inner side in the vehicle width direction. It extends to the vehicle lower side.

  The inner weather strip 30 is provided with a protruding piece (protruding portion) 34 protruding on the upper side of the vehicle along the vertical wall 32 </ b> A on the upper surface of the upper wall 32 </ b> B of the base material portion 32. The upper end of the projecting piece 34 extends to a position close to the inner surface of the upper end portion 46 </ b> A of the door trim 46.

  The inner weather strip 30 includes two elastically deformable seal lips 36 that extend from the outer surface of the vertical wall 32 </ b> A of the base portion 32 so as to protrude toward the wind glass 18. The two seal lips 36 are arranged in parallel in the vehicle upper and lower sides of the vertical wall 32A, and extend obliquely upward of the vehicle from the outer surface of the vertical wall 32A in the vehicle front view (vehicle rear view). Further, the inner weather strip 30 includes a connecting wall 38 that connects between the projecting piece 34 extending above the vertical wall 32 </ b> A and the upper surface of the upper seal lip 36. That is, the connecting wall 38 is bridged between the projecting piece 34 and the upper surface of the upper seal lip 36. Further, a circular through hole 40 as an example of an opening is provided in an intermediate portion in the protruding direction of the upper seal lip 36.

  The base portion 32 of the inner weather strip 30 has a plurality of clips in which the opening 31 on the vehicle lower side is extrapolated to the joint between the upper edge portion 14A of the door inner panel 14 and the vertical wall portion 24A of the door inner reinforcement 24. (Not shown).

  The base material portion 32 and the two seal lips 36 are arranged along the vehicle front-rear direction of the door body 12 (see FIG. 3). The two seal lips 36 extend in a direction intersecting with the trajectory in which the window glass 18 moves up and down, and the seal lip 36 is in sliding contact with the window glass 18 so that the sealing property with the window glass 18 is secured. Yes.

  The through hole (opening) 40 is an intermediate portion in the protruding direction of the upper seal lip 36 and is formed at a position facing the window glass 18. On the opposite side of the through hole 40 from the window glass 18, A closed space (closed space portion) S surrounded by three members of the upper seal lip 36, the base material portion 32 (the vertical wall 32 </ b> A and the protruding piece 34), and the connecting wall 38 is configured. In other words, a closed space S communicating with the through hole 40 is formed behind the upper seal lip 36 with respect to the window glass 18. A closed space S is disposed along the vehicle front-rear direction of the inner weather strip 30 attached to the joint between the upper edge portion 14A of the door inner panel 14 and the vertical wall portion 24A of the door inner reinforcement 24 (see FIG. 3). ).

  The through hole 40 is formed in an intermediate portion of the upper seal lip 36 in a front view of the vehicle, and the lower seal lip (other seal lip) 36 is disposed on the side where the through hole 40 is formed. . Accordingly, the through hole 40 is disposed between the contact portions between the tips of the two seal lips 36 and the window glass 18. As shown in FIG. 3, a plurality of through holes 40 are formed at predetermined intervals along the longitudinal direction (vehicle longitudinal direction) of the upper seal lip 36. In the present embodiment, the plurality of through holes 40 have a circular shape having substantially the same size.

  Further, the projecting piece 34 is provided on the substantially entire length of the base portion 32 in the vehicle front-rear direction. Since one end of the connecting wall 38 is connected to the outer surface of the projecting piece 34, the connecting wall 38 descends from the outer surface of the projecting piece 34 toward the seal lip 36 when viewed from the front of the vehicle. Are arranged as follows.

  Further, the inner weather strip 30 is formed with a lip 30A that abuts against the inner surface (back surface) of the upper end portion 46A of the door trim 46 on the upper surface of the upper wall 32B. Further, on the inner side surface of the vertical wall 32A of the inner weather strip 30, two lips 30B, 30C extending toward the door inner panel 14 and the lower side of the two lips 30B, 30C contact the door inner panel 14. A lip 30D extending so as to contact is formed.

  The seal lip 36 and the connecting wall 38 of the inner weather strip 30 are formed of an elastic body such as rubber or resin. The inner weather strip 30 is formed by extrusion molding. In this embodiment, the base material portion 32, the seal lip 36, and the connecting wall 38 are integrally formed, and both end portions of the connecting wall 38, which is a separate part, are connected to the protruding piece 34 of the base material portion 32 and the upper seal lip 36. Compared to the case of bonding to the upper surface or fixing with a clip or the like, an increase in the number of parts and a post-process for fixing are not required.

  The door trim 46 is arranged so that the upper end portion 46 </ b> A wraps inward in the vehicle width direction from the vehicle upper side of the inner weather strip 30. The lip 30 </ b> A of the upper wall 32 </ b> B of the inner weather strip 30 abuts on the inner wall portion (back surface) of the upper end portion 46 </ b> A of the door trim 46, so that the sealability between the inner weather strip 30 and the door trim 46 is ensured. Further, the lip 30D of the vertical wall 32A of the inner weather strip 30 abuts on the door inner panel 14, so that the sealability between the inner weather strip 30 and the door inner panel 14 is secured.

  Next, the operation and effect of this embodiment will be described with reference to FIGS.

  In FIG. 5, a closed space S formed by the seal lip 36 on the upper side of the inner weather strip 30 used in the vehicle door structure 28, the base portion 32 (the vertical wall 32 </ b> A and the projecting piece 34), and the connecting wall 38 is formed. It is shown in a cross-sectional view along the vehicle longitudinal direction. As shown in FIG. 5, a plurality of through holes 40 are formed in the upper seal lip 36 facing the window glass 18 (see FIG. 2) along the longitudinal direction of the inner weather strip 30. On the opposite side of the upper seal lip 36 from the window glass 18, a closed space S communicating with the plurality of through holes 40 is formed on the upper seal lip 36, the base member 32 (the vertical wall 32 </ b> A and the projecting piece 34), and the connecting wall 38. And is formed. In the closed space S formed by the upper seal lip 36 of the inner weather strip 30, the base material portion 32 (the vertical wall 32 </ b> A and the projecting piece 34), and the connecting wall 38, the upper space between the adjacent through holes 40 is upper. A virtual wall 39 is disposed in a direction orthogonal to the wall surface of the seal lip 36. By these virtual walls 39, spaces S1 communicating with the respective through holes 40 are formed behind the upper seal lip 36 (on the side opposite to the window glass 18).

  As shown in FIGS. 5 and 6, in such a vehicle door structure 28, the air in the portion of the through hole 40 is the mass 62, and the upper seal lip 36 and the base material portion behind the upper seal lip 36 are used. A one-degree-of-freedom spring mass system 60 is configured in which a space S <b> 1 defined by 32 (the vertical wall 32 </ b> A and the projecting piece 34), the connecting wall 38, and the virtual wall 39 becomes a spring 64. In this one-degree-of-freedom spring mass system 60, when sound of a specific frequency hits the air mass 62 in the through hole 40, the mass 62 vibrates violently in the expansion / contraction direction (arrow direction) of the spring 64. As a result, the sound energy changes to vibration energy, and the vibration energy changes to thermal energy due to the viscous resistance and friction of air, so that the sound of a specific frequency is significantly reduced.

  Here, the length in the penetration direction of the through hole 40 (thickness in the penetration direction) is l, the area of the through hole 40 is S, the volume of the space S1 behind the through hole 40 is V, the sound velocity is c, and the end of the through hole is When the correction value is Δl, the sound reduction frequency f is expressed by the following equation. The correction value Δl of the through-hole end corrects the vibration of the surrounding air because the air is viscous and tends to pull the surrounding air when the air in the through-hole 40 vibrates.

  As shown in this equation, the frequency at which the sound reduction effect is produced is determined by the size of the through hole 40 and the volume (volume) of the space S1 behind the through hole 40. FIG. 7 shows a graph of the relationship between frequency and sound reduction effect. As shown in FIG. 7, in the one-degree-of-freedom spring mass system 60, the sound is remarkably reduced (at a specific frequency) when resonating. Further, as shown in FIG. 7, by changing the size of the through hole 40 and the volume (volume) of the space S1 behind the through hole 40, the frequencies 66A, 66B, and 66C that produce a sound reduction effect change. To do.

  Here, the vehicle door structure 50 according to the second embodiment will be described with reference to FIG. In addition, about the same component as 1st Embodiment, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 4, the inner weather strip 52 to which the vehicle door structure 50 is applied has an upper surface of the projecting piece 34 of the base portion 32 and the upper seal lip 36 in the vehicle front view (vehicle rear view). A circular through hole 54 as an example of an opening is formed in an intermediate portion of the connecting wall 38 that connects the two. On the back side of the connecting wall 38 facing the window glass 18, a closed space (closed) surrounded by three members of the connecting wall 38, the base portion 32 (the vertical wall 32 </ b> A and the projecting piece 34), and the upper seal lip 36. A space portion S is formed, and the closed space S communicates with the through hole 54 of the connecting wall 38. In the inner weather strip 52, a through hole 54 is disposed above the upper seal lip 36 in a front view of the vehicle. In other words, the through hole 54 is disposed downstream of the contact portion between the tip of the upper seal lip 36 and the wind glass 18 in the sound intrusion direction from the outside of the vehicle. Although not shown, a plurality of through holes 54 are provided at predetermined intervals along the vehicle front-rear direction of the connecting wall 38.

  In the inner weather strip 52 to which the vehicle door structure 50 is applied, a through hole 54 is provided in the middle portion in the protruding direction of the upper connecting wall 38 with respect to the two seal lips 36, and the connecting wall 38 and the base material are provided. A one-degree-of-freedom spring mass system 60 (see FIG. 6) is formed by forming a closed space S surrounded by three members of the portion 32 (the vertical wall 32A and the protruding piece 34) and the upper seal lip 36. Yes. Therefore, as shown in FIG. 6, when a sound having a specific frequency hits the air mass 62 in the through hole 54, the mass 62 vibrates in the expansion / contraction direction of the spring 64. As a result, the sound energy changes to vibration energy, and the vibration energy changes to thermal energy due to the viscous resistance and friction of air, so that the sound of a specific frequency is significantly reduced.

  FIG. 16 shows a vehicle door structure 300 of the first comparative example. In the vehicle door structure 300, the inner weather strip 302 includes a substantially U-shaped base part 32 and two upper and lower seal lips projecting obliquely upward from the vertical wall 32 </ b> A outside the base part 32 in the vehicle width direction. 36. The vehicle door structure 300 is opposed to the window glass 18 as shown in the vehicle door structure 28 (see FIG. 2) of the first embodiment, the vehicle door structure 50 (see FIG. 4) of the second embodiment, and the like. The through hole and the closed space behind it are not provided.

  FIG. 8 is a graph showing the relationship between the frequency and the sound reduction effect. In this graph, the case of the vehicle door structure 300 of the first comparative example (see FIG. 16) is indicated by a line 86, and the case of the vehicle door structure 50 of the second embodiment (see FIG. 4) is indicated by a line 84. Yes. As shown in this graph, the vehicle door structure 50 of the second embodiment has a specific frequency compared to the vehicle door structure 300 of the first comparative example in which the through hole and the closed space behind the through hole are not provided. Increases the sound reduction effect.

  Further, in FIG. 9, the relationship between the frequency and the sound reduction effect in the case of the vehicle door structure 28 (see FIG. 2) of the first embodiment is indicated by a line 88. As shown in FIG. 9, in the vehicle door structure 28 (see FIG. 2, etc.) of the first embodiment, a through hole 40 is provided in the upper seal lip 36 of the inner weather strip 30, and two upper and lower seal lips 36 are provided. By disposing the through hole 40 between the front end of the window and the windshield 18, the frequency range in which sound is reduced is wider compared to the vehicle door structure of the second embodiment (see FIG. 4). Become.

  Here, the effect of widening the frequency range in which the sound by the vehicle door structure 28 is reduced will be described in more detail.

  When the vehicle door structure 28 is simplified (schematically shown), as shown in FIG. 10, the upper seal lip 36 and the lower seal lip 36 in the wall body 220 are connected to a central connection point. A structure 200 connected by two upper and lower springs 224 connected by 222, an upper seal lip 36 that forms a closed space S through a through hole 40 formed in the wall body 220, a base member 32, and a connecting wall The structure 210 having 38 is connected to the structure 210. In this structure, the air in the portion of the through hole 40 formed in the upper seal lip 36 becomes a mass 62, and the mass 62 has a spring 64 in the closed space S and one end of the spring 90 in the closed space in the wall body 220. Are connected, and the other end of the spring 90 is connected to the connecting point 222.

  On the other hand, when the vehicle door structure 300 of the first comparative example shown in FIG. 16 is simplified, the upper seal lip 36 and the lower seal lip 36 in the wall body 220 are connected to each other at the connection point 222 in the center. The structure 200 is connected by two connected upper and lower springs 224. That is, with only the structure 200 that does not connect the structure 210, an incident sound enters the wall body 220 through the gap between the lower seal lip 36 as indicated by an arrow A, and the upper seal lip 36 and the upper seal lip 36 as indicated by an arrow B. There is a possibility that transmitted sound may be emitted from the gaps to the outside of the wall body 220.

  When the structure shown in FIG. 10 is modeled, as shown in FIG. 11, the gap between the upper seal lip 36 and the lower seal lip 36 and the wall body 220 is a mass 226 and the gap between the two seal lips 36. The two-degree-of-freedom spring mass system 230 in which the closed space becomes two springs 224 and 224 is formed by the upper seal lip 36, the base portion 32, and the connecting wall 38 that form the through-hole 40 and the closed space S. In addition, a spring mass system 92 having three degrees of freedom is formed by adding a spring mass system 60 having one degree of freedom.

  That is, in the spring mass system 230 corresponding to the structure 200 (see FIG. 10), when a sound with a specific frequency hits the mass 226, the mass 226 vibrates in the expansion / contraction direction (arrow direction) of the springs 224 and 224, and the energy of the sound is increased. Changes to vibration energy. Since the spring mass system 230 is vertically symmetric, it is equivalent to a one-degree-of-freedom spring mass system and has one peak resonance.

  Further, in the spring mass system 60 (corresponding to the structure 210 shown in FIG. 10) added to the spring mass system 230, when a sound having a specific frequency hits the air mass 62 in the through-hole 40, the mass 62 becomes the spring 64. Vibrates vigorously in the expansion / contraction direction (arrow direction). As a result, the sound energy changes to vibration energy, and the vibration energy changes to thermal energy due to the viscous resistance and friction of air, so that the sound of a specific frequency is significantly reduced. At this time, since the spring mass system 230 is a vertical object, it is equivalent to a one-degree-of-freedom spring mass system. Therefore, the spring-mass system 92 of this embodiment is equivalent to a two-degree-of-freedom spring mass system. For this reason, as shown in FIG. 9, the line 88 of the sound reduction effect has a two-peak resonance, and a sound reduction effect can be obtained over a wide range of frequencies.

  Therefore, by using the vehicle door structure 28 in which the through hole 40 is provided between the contact portions where the tip ends of the two upper and lower seal lips 36 and the window glass 18 are in contact with each other, a sound reduction effect appears in a wide range of frequencies. . For this reason, the sound insulation effect of the sound which penetrates into the vehicle interior 26 from the outside of the vehicle can be further enhanced.

  FIG. 17 shows a vehicle door structure according to a second comparative example. As shown in FIG. 17, the inner weather strip 312 used in the vehicle door structure 310 includes a base portion 32 having a substantially U-shaped cross section in which an opening is formed on the vehicle lower side in a front view of the vehicle, and a base. A substantially rectangular wall 314 that forms a closed space S together with a vertical wall 314A on the vehicle outer side of the material portion 32, and an upper and lower 2 extending so as to protrude from the vertical wall 314B on the vehicle outer side of the wall 314 toward the wind glass 18 side. Sheet sealing lip 36. Further, a through hole 40 is formed in the vertical wall 314 </ b> B on the vehicle exterior side of the wall body 314 in the inner weather strip 312 between the tip of the two upper and lower seal lips 36 and the contact portion between the window glass 18. That is, by providing the through hole 40 in the vertical wall 314 </ b> B of the substantially rectangular wall body 314, the closed space S communicating with the through hole 40 is formed.

  A resin door trim 320 is attached to the inside of the door body 12 in the vehicle width direction so as to cover the vehicle inner side surfaces of the door inner panel 14 and the door inner reinforcement 24 from the upper end portion of the inner weather strip 312.

  In this vehicle door structure 310, a through hole 40 is provided in a vertical wall 314B of a substantially rectangular wall body 314, and a spring mass system 60 (see FIG. 11) is formed by the wall body 314 that forms a closed space S with the through hole 40. ) Is configured. For this reason, the sound reduction effect appears at a specific frequency, and the sound insulation effect of the sound entering the vehicle compartment 26 from the outside of the vehicle can be enhanced. However, the inner weather strip 312 is provided with a substantially rectangular wall body 314, and a space in the vehicle width direction for creating the closed space S is required. For this reason, as shown by the arrow C, the door trim 320 has a structure in which the substantially rectangular wall body 314 is not provided (for example, the vehicle door structure 300 of the first comparative example shown in FIG. 16). It will be closer to the inner side in the vehicle width direction, and the occupant's living space in the passenger compartment 26 will be reduced.

  On the other hand, in the vehicle door structure 28 (see FIG. 2) of the first embodiment, a connecting wall 38 that connects the protruding piece 34 and the upper surface of the upper seal lip 36 is provided above the upper seal lip 36. By forming the through hole 40 in the upper seal lip 36, a closed space S surrounded by the upper seal lip 36, the connecting wall 38, and the base material portion 32 (the vertical wall 32A and the protruding piece 34) is formed. Yes. That is, by providing the closed space S above the upper seal lip 36, it is not necessary to secure a new space on the inner side in the vehicle width direction. For this reason, compared with the vehicle door structure 300 (see FIG. 16) of the first comparative example, the inner weather strip 30 is not changed without changing the dimension of the inner weather strip 30 in the vehicle width direction or the arrangement structure of the door trim 46. A closed space S communicating with the through hole 40 can be set. For this reason, it can prevent or suppress that the passenger | crew's living space in the compartment 26 becomes small.

  Next, a third embodiment of the vehicle door structure according to the present invention will be described with reference to FIG. In addition, about the same component as 1st and 2nd embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 12, the inner weather strip 102 used in the vehicle door structure 100 includes two upper and lower seal lips 36 that protrude obliquely upward from the vertical wall 32 </ b> A of the base portion 32. The tip of the seal lip 36 is in contact with the window glass 18. The inner weather strip 102 includes a connecting wall 104 that connects the vertical wall 32 </ b> A and the lower surface of the lower seal lip 36 below the lower seal lip 36. The connecting wall 104 is formed in a substantially L shape when the vehicle is viewed from the front. In addition, a circular through hole 40 as an example of an opening is formed at an intermediate portion in the projecting direction of the lower seal lip 36 when viewed from the front of the vehicle, and behind the through hole 40 (opposite to the window glass 18). A closed space (closed space portion) S surrounded by three members of the lower seal lip 36, the connecting wall 104, and the vertical wall 32A is formed. In the present embodiment, the connecting wall 104 is formed of an elastic body such as rubber, and is integrally formed with the lower seal lip 36 and the vertical wall 32A.

  A through hole 40 is also formed in the middle of the upper seal lip 36 in the protruding direction, and the upper seal lip 36, the connecting wall 38, and the base material are located behind the through hole 40 (on the opposite side of the window glass 18). A closed space (closed space portion) S surrounded by three members of the portion 32 (the vertical wall 32A and the protruding piece 34) is formed. That is, the through hole 40 of the lower seal lip 36 and the through hole 40 of the upper seal lip 36 are located between the contact portions of the wind glass 18 and the tips of the two upper and lower seal lips 36 in the sound intrusion direction. Has been placed. In the present embodiment, the connecting wall 38 is formed of an elastic body such as rubber, and is integrally formed with the upper seal lip 36 and the projecting piece 34 of the base portion 32.

  In such a vehicle door structure 100, the through-hole 40 of the lower seal lip 36 and the upper seal are provided between the contact portions between the tips of the two upper and lower seal lips 36 and the wind glass 18 in the sound intrusion direction. Two spring mass systems 60 (see FIG. 6) are configured by arranging the through holes 40 of the lip 36 and forming the closed spaces S behind the respective through holes 40. Therefore, as shown in FIG. 6, when a sound having a specific frequency hits the air mass 62 in the through hole 40, the mass 62 vibrates in the expansion / contraction direction of the spring 64. Thereby, the sound of a specific frequency is reduced remarkably and sound insulation can be improved.

  Further, the closed space S is formed behind the through holes 40 of the lower seal lip 36 and the upper seal lip 36, and the two spring mass systems 60 are configured to enter the vehicle compartment 26 from the outside of the vehicle. The sound insulation effect of the sound to be played can be improved more reliably.

  Next, a fourth embodiment of the vehicle door structure according to the present invention will be described with reference to FIG. In addition, about the same component as 1st-3rd embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 13, the inner weather strip 112 used in the vehicle door structure 110 includes two upper and lower seal lips 36 that project obliquely upward from the vertical wall 32 </ b> A of the base portion 32. The tip of the seal lip 36 is in contact with the window glass 18. The inner weather strip 112 includes a connecting wall 114 that connects the vertical wall 32 </ b> A and the lower surface of the upper seal lip 36 below the upper seal lip 36. The connecting wall 114 is formed in a substantially L shape when the vehicle is viewed from the front. In addition, a circular through hole 40 as an example of an opening is formed in an intermediate portion of the connecting wall 114 in the protruding direction when viewed from the front of the vehicle, and behind the through hole 40 (on the side opposite to the window glass 18). A closed space (closed space portion) S surrounded by three members of the connecting wall 114, the upper seal lip 36, and the vertical wall 32A is formed. In the present embodiment, the connecting wall 114 is formed of an elastic body such as rubber, and is integrally formed with the upper seal lip 36 and the vertical wall 32A.

  In such a vehicle door structure 110, the through hole 40 is formed in the connecting wall 114 of the upper seal lip 36 when viewed from the front of the vehicle, and the lower seal lip ( Another seal lip) 36 is arranged. Thereby, the through hole 40 is disposed between the contact portions between the tips of the two upper and lower seal lips 36 and the wind glass 18 in the sound intrusion direction. That is, the spring mass system 60 (see FIG. 6) is formed between the through holes 40 and the closed space S behind the through holes 40 between the contact portions of the wind glass 18 and the tips of the two upper and lower seal lips 36 in the sound intrusion direction. ) Is configured. Therefore, the sound of a specific frequency is remarkably reduced, and the sound insulation effect of the sound entering the vehicle compartment 26 from the outside of the vehicle can be enhanced.

  In addition, in 4th Embodiment, although the through-hole 40 is formed in the connection wall 114, it is not limited to this, The through-hole connected with the closed space S in the intermediate part of the upper seal lip 36 by the vehicle front view The structure which forms may be sufficient.

  Next, a fifth embodiment of the vehicle door structure according to the present invention will be described with reference to FIG. In addition, about the same component as 1st-4th embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 14, the inner weather strip 122 used in the vehicle door structure 120 includes two upper and lower seal lips 36 that protrude obliquely upward from the vertical wall 32 </ b> A of the base portion 32. The tip of the seal lip 36 is in contact with the window glass 18. The inner weather strip 122 includes a connecting wall 124 that connects between an intermediate portion of the lower surface of the upper seal lip 36 and an intermediate portion of the upper surface of the lower seal lip 36 in a vehicle front view. The connecting wall 124 is disposed along the vehicle vertical direction substantially parallel to the window glass 18 when the vehicle is viewed from the front. Further, a circular through hole 40 as an example of an opening is formed in an intermediate portion in the vertical direction of the connecting wall 124 in a front view of the vehicle, and behind the through hole 40 (on the side opposite to the window glass 18). A closed space (closed space portion) S surrounded by four members of the connecting wall 124, the upper and lower two sealing lips 36, and the vertical wall 32A is formed. In the present embodiment, the connecting wall 124 is formed of an elastic body such as rubber, and is integrally formed with the upper and lower two sealing lips 36.

  In such a vehicle door structure 120, the through hole 40 is disposed between the contact portions between the tips of the two upper and lower seal lips 36 and the window glass 18, and the closed space S is formed behind the through hole 40. The spring mass system 60 (refer FIG. 6) is comprised by forming. Therefore, the sound of a specific frequency is remarkably reduced, and the sound insulation effect of the sound entering the vehicle compartment 26 from the outside of the vehicle can be enhanced.

  In the fifth embodiment, the through-hole 40 is formed in the connecting wall 124, but the present invention is not limited to this, and the connecting wall 124 is closed to the upper seal lip 36 or the middle part of the lower seal lip 36 when viewed from the front of the vehicle. The structure which forms the through-hole connected with the space S may be sufficient.

  Next, a sixth embodiment of the vehicle door structure according to the present invention will be described with reference to FIG. In addition, about the same component as 1st-5th embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 15, the inner weather strip 132 used in the vehicle door structure 130 includes two upper and lower seal lips 36 that protrude obliquely upward from the vertical wall 32 </ b> A of the base portion 32. The tip of the seal lip 36 is in contact with the window glass 18. The inner weather strip 132 includes a connection wall 134 that connects the vertical wall 32 </ b> A and the upper surface of the lower seal lip 36 on the upper side of the lower seal lip 36. The connecting wall 114 is disposed so as to descend from the vertical wall 32A toward the lower seal lip 36 when viewed from the front of the vehicle. In addition, a circular through hole 40 as an example of an opening is formed in an intermediate portion of the connecting wall 134 in the protruding direction when viewed from the front of the vehicle, and behind the through hole 40 (on the side opposite to the window glass 18). A closed space S surrounded by three members of the connecting wall 134, the lower seal lip 36, and the vertical wall 32A is formed. In the present embodiment, the connecting wall 134 is formed of an elastic body such as rubber, and is integrally formed with the lower seal lip 36 and the vertical wall 32A.

  In such a vehicle door structure 130, the through hole 40 is formed in the connecting wall 134 of the lower seal lip 36 in the front view of the vehicle, and the upper seal lip ( Another seal lip) 36 is arranged. Accordingly, the through hole 40 is disposed between the contact portions of the wind glass 18 and the tip ends of the two upper and lower seal lips 36 in the sound intrusion direction, and the spring mass is formed by the closed space S behind the through hole 40. A system 60 (see FIG. 6) is configured. Therefore, the sound of a specific frequency is remarkably reduced, and the sound insulation effect of the sound entering the vehicle compartment 26 from the outside of the vehicle can be enhanced.

  In the sixth embodiment, the through hole 40 is formed in the connecting wall 134. However, the present invention is not limited to this, and the through hole communicates with the closed space S in the middle portion of the lower seal lip 36 when viewed from the front of the vehicle. The structure which forms a hole may be sufficient.

  In the vehicle door structure of the first to sixth embodiments, the number of the seal lips 36 is two, but the number of the seal lips 36 may be increased to three or more.

  In the first to sixth embodiments, the plurality of through holes 40 formed at positions facing the window glass 18 have a circular shape having substantially the same size, but the plurality of through holes (openings). May have different shapes. Moreover, although the through-hole is circular shape, it is good also as other shapes, such as a triangle, a square, and a polygon. In addition, although the shape of a through-hole is not ask | required, since a through-hole is opened with a trim on manufacture, circular is preferable.

  In the first to sixth embodiments described above, the vehicle door structure of the present invention is applied using the inner weather strip as the seal member. However, the belt is attached to the door outer panel on the outer side in the vehicle width direction than the window glass 18. The vehicle door structure of the present invention may be applied to a molding (seal member).

  In the first to sixth embodiments described above, the vehicle door structure is provided on the front side door. However, the present invention is not limited to this and can be applied to other vehicle doors such as a rear side door.

10 Front side door (vehicle door)
12 Door body 14 Door inner panel (panel member)
14A Upper edge 18 Wind glass (door glass)
28 Vehicle door structure 30 Inner weather strip (seal member)
32 base material part 32A vertical wall 34 protrusion (protrusion part)
36 Seal lip 38 Connecting wall 40 Through hole (opening)
50 Vehicle door structure 52 Inner weather strip (seal member)
54 Through hole (opening)
100 Vehicle door structure 102 Inner weather strip (seal member)
104 Connecting Wall 110 Vehicle Door Structure 112 Inner Weather Strip (Seal Member)
114 Connecting Wall 120 Vehicle Door Structure 122 Inner Weather Strip (Seal Member)
124 Connecting Wall 130 Vehicle Door Structure 132 Inner Weather Strip (Seal Member)
134 Connection Wall S Closed Space (Closed Space)

Claims (5)

A door body that supports the door glass to be movable up and down;
A base material portion attached to an upper end portion of a panel member constituting a part of the door main body, and extending from the vertical wall on the door glass side of the base material portion obliquely upward of the vehicle, so that the tip is in sliding contact with the door glass. An elastically deformable seal lip disposed on the sealing member;
A closed space provided on the seal member and configured to include the seal lip and the vertical wall;
Provided in a part of the closed space portion excluding the vertical wall, and an opening disposed on the door glass side;
A vehicle door structure. The seal member includes a connection wall arranged to connect the vertical wall and the seal lip.
The closed space surrounded by three members of the seal lip, the connecting wall and the vertical wall;
The vehicle door structure according to claim 1, wherein the opening that communicates with the closed space is formed in one of the seal lip and the connecting wall. The seal member comprises two connecting lips arranged so that two seal lips are arranged on the upper and lower sides of the vehicle, and connected between the two upper and lower seal lips,
The closed space portion surrounded by the four members of the upper and lower two sealing lips, the connecting wall, and the vertical wall;
The vehicle door structure according to claim 1, wherein the opening that communicates with the closed space is formed in one of the seal lip and the connecting wall.   The vehicle door structure according to claim 1, wherein the seal member includes another seal lip spaced from the seal lip on a side where the opening is formed.   The said sealing member of Claim 1, 2 or 4 which has a protrusion part which protrudes in the vehicle upper side from the upper end part of the said vertical wall in the said base material part, and the one end of the said connection wall is connected. Vehicle door structure.

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