JP4395731B2 - Auto body structure - Google Patents

Description

  The present invention relates to a vehicle body structure including an intake cowl that functions as an outside air intake for indoor ventilation of an automobile. More specifically, a vehicle body structure of a vehicle, which is disposed at the front position of the vehicle and has a structure in which a rainwater discharge passage formed in an intake cowl that functions as an outside air intake for indoor ventilation of the vehicle communicates with an engine room. About.

  A basic schematic configuration of a conventional vehicle body structure related to this technique is shown in FIGS. FIG. 11 is a perspective view schematically showing a state in which the engine hood is removed from the vehicle body structure of the automobile. FIG. 12 is a schematic cross-sectional view of FIG. 11 viewed from the front side of the vehicle. As shown in FIGS. 11 and 12, in the vehicle body structure 10 of an automobile, the introduction of outside air for indoor ventilation of the automobile is omitted, but the intake cowl 1 is connected to the intake cowl 1 via a slit-shaped intake passage 3 formed in the cowl louver. The intake cowl 1 is led to an air conditioner, and is air-conditioned and introduced into the room.

  By the way, since rainwater also enters from the intake passage 3 of the cowl louver for taking in the outside air due to its structure, a rainwater discharge passage 2 for draining the vehicle outward is formed below the intake cowl 1. A fender 81 is provided at an upper position of the tire 83, and rainwater that has entered the intake cowl 1 through the intake passage 3 of the cowl louver flows into the fender 81 through the rainwater discharge path 2, and the fender liner 82. It drains from the drain hole provided in the predetermined position. The engine hood 85 prevents rainwater from entering the engine room.

  In the basic configuration of the automobile body described above, the following problems occur during indoor ventilation. That is, when the outside air temperature is relatively cool, without using an air conditioner, when the blower is used to introduce outside air into the vehicle interior, the pressure around the outside air inlet 71 is negative due to the suction by the blower. Therefore, the hot air generated in the engine room may be sucked into the vehicle interior from the duct 72 through the fender 81 located outside the suspension tower 86 or the space generated between the fender 81 and the apron panel member 87. . For this reason, although the temperature outside the vehicle is low and the vehicle interior temperature is hot air from the engine even though the outside air temperature is in use, air at a temperature higher than the outside temperature may be taken in as a result. . Further, even when the air conditioner is attached and the outside air is introduced into the passenger compartment, the efficiency of the predetermined set temperature may be deteriorated due to the influence of the hot air suction.

A basic schematic configuration of a conventional vehicle body structure in which this point is improved is shown in FIGS. FIG. 13 is a perspective view schematically showing a state in which the engine hood is removed from the vehicle body structure of the automobile. FIG. 14 is a schematic cross-sectional view of FIG. 13 viewed from the front of the vehicle. In the vehicle body structure 10, seal members 91 and 92 are installed in a passage from the engine room that leads to the rainwater discharge path 2 formed in the intake cowl 1, and hot air in the engine room enters the vehicle compartment through the rainwater discharge path 2. Is prevented or reduced. That is, the space generated in the fender 81 or between the fender 81 and the apron panel member 87 is a space through which the rainwater discharge passage 2 normally communicates with the engine room, and the sealing members 91 and 92 such as resin are packed in this space. Thus, hot air generated in the engine room is prevented from reaching the outside air inlet 71 of the intake cowl 1. This prevents or reduces the suction of hot air generated in the engine room into the duct. As this type of related technology, there are those shown in Patent Document 1 and Patent Document 2 below.
JP 2000-6842 A JP 2003-118641 A

  However, in the above-described conventional improved automobile body structure, hot air in the engine room is prevented or reduced from being taken into the passenger compartment, but there are further problems as described below, and improvements are desired. Yes. That is, as shown in FIG. 13 and FIG. 14, the conventional improvement measures are performed at locations relatively far from the outside air inlet 71 and the rainwater discharge path 2 of the intake cowl 1 because of the ease of installing the seal member. . For this reason, the passage from the rainwater discharge passage 2 to the engine room is branched into a plurality of passages, and seal members must be installed in the plurality of passages. The number of man-hours was also the same, and the cost was inevitably high. It has been pointed out that disposing the seal member 91 in the fender 81 deteriorates the efficiency of draining rainwater.

  In order to solve this problem, the present applicants have proposed and filed another improvement measure as follows. The basic schematic configuration of the proposed automobile is shown in FIGS. FIG. 1 is a perspective view showing a state where an engine hood is removed in a vehicle body structure of an automobile. FIG. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a perspective view showing an attached state of the one-way valve 4 and the foam seal material 95 in FIG. In this proposed vehicle body structure 10, as shown in FIG. 1, the intake of outside air into the interior of the vehicle in which the engine room 7 is disposed at the front position is taken in at the rear position of the engine room 7. An intake cowl 1 that forms an intake passage 3, and a rainwater discharge passage 2 that discharges rainwater that has entered through the intake passage 3 is inclined so that rainwater flows downward in the vehicle width direction at the lower portion of the intake cowl 1. The rainwater discharge path 2 is configured to communicate with the engine room 7. In the vehicle body structure 10 of the automobile having such a configuration, the one-way valve configured to substantially block the rainwater discharge path 2 at a downstream position of the rainwater discharge path 2 from the intake ports 70 and 71 of the intake passage 3 into the room. 4 is provided, and the one-way valve 4 is arranged so as to be open for the flow in the direction in which rainwater flows down, but closed for the flow in the opposite direction. is there.

According to the content of the above-mentioned improvement proposal by the present applicant, since only the one-way valve 4 is provided in the rainwater discharge passage 2 and the hot air in the engine room 7 is substantially blocked from entering the vehicle interior, the cost is lower than that of the conventional structure. It is possible to sufficiently exhibit a good ventilation function when introducing outside air into the vehicle interior while reducing the amount, and the conventional problems can be solved.
However, an improvement for further cost reduction based on the content of the above-described improvement proposal is desired. That is, when the one-way valve 4 for improvement is mounted and fixed to the intake cowl 1 forming the rainwater discharge passage, normally, as shown in FIG. This is performed by filling the gaps 48a and 48b with the vehicle body portion 49 forming the road 2 by foaming and filling the foamed sealing material 95. For this reason, as shown in FIG. 3, a lot of foaming sealing material must be used around the one-way valve 4, and the number of parts is increased. There is a problem that the cost of the mounting process increases. Further, the downstream part of the rainwater discharge path 2 in which the one-way valve 4 is provided is often mixed with other members constituting the vehicle body part around it, and the one-way valve 4 interferes with other members. There is a problem in mounting that the mounting may be difficult.

The present invention has been made in view of the above problems, and the problem to be solved by the present invention is to further reduce the cost by reducing the number of parts in attaching the one-way valve to the rainwater discharge path. The purpose is to reduce.
Furthermore, in addition to the above-described problems, the one-way valve can be easily attached even when the vehicle body structure around the rainwater discharge path is complicated.

In order to solve the above-mentioned problems, the present invention takes the following means.
A first aspect of the invention is an intake cowl formed with an intake passage in which outside air intake into the interior of an automobile with an engine room disposed at a front position is taken in at a rear position of the engine room. The rainwater drainage path for draining rainwater that has entered through the vehicle is inclined at the lower part of the intake cowl so that the rainwater flows downward in the vehicle width direction, and the rainwater drainage path communicates with the engine room. In the vehicle body structure of the automobile, a one-way valve configured to substantially block the rainwater discharge path is provided at a downstream position downstream of the rainwater discharge path from an intake port of the intake passage into the room, and the one-way valve is opened. And a flexible member capable of closing the opening of the frame, and is open for the flow in the direction in which rainwater flows down, but for the flow in the opposite direction Close And the portion for fixing the one-way valve to the rainwater discharge passage is formed such that the flexible member is formed larger than the outer shape of the frame body, and rainwater It is characterized by sealing a gap with the discharge path.

  According to the first aspect of the present invention, the one-way valve is provided at the downstream side of the rainwater discharge passage from the intake opening of the intake passage into the room, thereby closing the communication passage connecting the intake opening for taking the outside air into the vehicle compartment and the engine room. It is out. For this reason, the minimum number of one-way valves is sufficient, and the vehicle body structure of an automobile can be configured at a low cost. In other words, at most, it is sufficient to provide one one-way valve on each side of the rainwater discharge path. In some cases, only one of the one-way valves may be provided, and it can be configured at low cost. Is.

  In addition, since the one-way valve is composed of a frame having an opening and a flexible member that can close the opening, a valve function that opens only in one direction can be easily configured. And since the outline shape of the attachment external shape of a one-way valve can be demarcated by the external shape of a frame, it becomes easy to attach the one-way valve to the rainwater discharge path.

  Further, since the one-way valve is arranged so as to be opened in the direction in which rainwater flows down, the rainwater is discharged from the rainwater discharge path without any resistance as before. However, since the one-way valve is configured to be substantially closed against the flow in the opposite direction, the hot air in the engine room can be substantially prevented from being sucked into the intake into the vehicle interior. Thus, the outside air temperature taken into the passenger compartment is not substantially affected.

  The fixing of the one-way valve to the rainwater discharge path is such that the flexible member of the one-way valve is formed larger than the outer shape of the frame, and the mounting portion is sealed by the large formed portion. Therefore, it is not necessary to separately provide another member for sealing, and the cost required for the attachment can be further reduced. That is, the flexible member according to the present invention has a function of closing the opening and a function of sealing the gap with the rainwater discharge path, which is different from the usual one-way valve mounting shown in FIG. Since it is not necessary to separately use a foamed sealing material for the attachment, the vehicle body structure of the automobile can be configured at a lower cost.

  Here, “rainwater” in the present invention is used in the sense of including rainwater caused by normal rainfall, and water that has become water by melting snow or sleet. In this sense, the present invention is naturally applicable to a case where snow or the like that has accumulated on the body of an automobile melts and becomes water, and the snow water is discharged through a rainwater discharge path.

  In addition, the “opening” in the present invention includes not only a state in which the mouth is open in a square shape in the one-way valve as shown in FIG. 2 but also a state in which the mouth is open in the lower part of the one-way valve. Used in meaning. That is, any mouth shape may be used as long as it has a function of discharging rainwater that has entered through the intake cowl.

In the following, the A predetermined gap is formed between the lower end and flows down surface of該雨water discharge passage of the frame of the one-way valve which is disposed rainwater discharge path, the predetermined gap is falling surface It is a gap that allows rainwater on the surface to flow down without being hindered by surface tension, and is a gap that does not cause a substantial effect in the room even if hot air in the engine room enters the room. .

In inventions of this, the following reason was to form a predetermined gap between the lower end and flows down surface of the rainwater discharge path of the one-way valve that is disposed in the rainwater discharge path. In other words, the snow that has accumulated on the body of a car such as a cowl louver melts while the car's engine is stopped and becomes water, and this water slowly flows down the flow surface of the rainwater discharge path, and the water becomes frozen. When this gap is not present or the gap is small, the flowing water contacts the lower end of the one-way valve due to surface tension and freezes in the contact state, thereby obstructing the opening function of the one-way valve. Even in this frozen state, a predetermined gap is provided in order to make the opening function of the one-way valve function effectively. Accordingly, the “predetermined gap” is a minimum gap where water on the surface of the flow surface does not contact the lower end of the one-way valve even by surface tension. However, if the predetermined gap is too large, hot air in the engine room is sucked into the intake into the passenger compartment, so that even if some hot air in the engine room is sucked in, the outside air temperature can be substantially reduced to the outside temperature. It is necessary to keep it at a level that does not affect it. It is to be noted that such a predetermined gap functions effectively in a so-called cold region.

The predetermined gap between the lower end of the one-way valve described above and the flow surface of the rainwater discharge path needs to be 2 mm or more in consideration of the normal surface tension of water. In addition, in order to keep the air temperature that is taken into the passenger compartment through the gap to a level that does not substantially affect the outside air temperature taken into the passenger compartment, the opening area formed by the gap is reduced. It is required to be 10 cm ² or less. In order to make this opening area or less, the gap distance from the flow surface of the rainwater discharge path to the lower end of the one-way valve is usually required to be 10 mm or less. Preferably it is 5 mm or less. Therefore, it can be said that the “predetermined gap” is preferably formed as a gap having a height within a range of 2 mm to 10 mm from the flow surface of the rainwater discharge path to the lower end of the one-way valve. More preferably, the distance from the flow lower surface of the rainwater discharge path to the lower end of the one-way valve is formed within a range of 2 mm to 5 mm. If such a gap is formed, even if hot air in the engine room enters the room through the one-way valve, it does not substantially affect the outside air temperature introduced into the room, and the intended problem of the present invention is achieved. It can be achieved.

Next, according to a second aspect of the present invention, in the vehicle body structure of the automobile according to the first aspect described above, the flexible member is provided with a slit corresponding to the outside of the opening of the frame body. An on-off valve is formed by the above.
Next, a third aspect of the invention is the vehicle body structure according to the first aspect or the second aspect of the invention, wherein the outer shape of the frame of the one-way valve is inserted into the rainwater discharge passage. When mounting, it is formed except for a portion that interferes with other members at the time of insertion and becomes an insertion obstacle, and the interference portion is formed of only a flexible member.

  According to the third aspect of the present invention, in the case where other members that interfere with the one-way valve are mixed around the rainwater discharge path, the interfering one-way valve does not constitute a frame body and is flexible. It consists only of members. For this reason, when the one-way valve passes through the interference portion at the time of attachment, the flexible member is deformed and can be easily inserted into a predetermined position. That is, when the frame body of the one-way valve is formed except for a portion that interferes with other members at the time of insertion and becomes a hindrance, insertion is smooth even when the frame body is formed of a rigid body. In addition, it can be attached to the rainwater discharge path while avoiding interference with other members. That is, since the interference location is formed only by the flexible member, the flexible member is deformed and bent in a direction to avoid the interference, so that interference with other members is avoided. As a result, other members have entered the vicinity of the rainwater discharge path in a complicated manner, and even when the structure is complicated, the one-way valve can be attached to the rainwater discharge path in a state adapted to it. Further, the insertion movement when the one-way valve is attached to the rainwater discharge path is smoothly performed, and the one-way valve can be easily disposed and fixed to the rainwater discharge path.

The present invention can obtain the following effects by taking the above-described means.
First, in the first invention, in addition to the effects in the content that the applicant previously proposed for improvement, the flexible member that performs the valve function of the one-way valve is configured to seal the gap with the rainwater discharge path. As a result, the number of parts can be reduced as compared with the normal mounting method of the one-way valve, and the cost can be reduced accordingly.
The next, so to form a predetermined gap between the lower end and flows down surface of the rainwater discharge path of the one-way valve that is disposed in the rainwater discharge passage, the opening function of the one-way valve, even when a state of freezing the so-called cold climates The rainwater can be reliably discharged even in such a state.
Next, according to the third invention, when the one-way valve is inserted and installed in the rainwater discharge path, the vehicle body structure around the rainwater discharge path is complicated, and there is an influence of other interfering members. The one-way valve can be attached to the rainwater discharge passage in a manner suitable for the structure.

Embodiments of the present invention will be described below. The present embodiment is substantially the same as the basic configuration of the automobile body structure shown in FIG. 1, which has already been proposed by the applicants described above, but is particularly characterized in the installation of a one-way valve. is there. The configuration of the embodiment is shown in FIGS.
FIG. 1 is a perspective view showing a basic schematic configuration of a vehicle body structure of an automobile according to the present embodiment with an engine hood removed. FIG. 4 is a perspective view showing the one-way valve 4 of FIG. 1 used in the present embodiment. FIG. 5 is a cross-sectional view taken along line AA of FIG. 1 in the present embodiment. 6 is a cross-sectional view taken along the line BB in FIG. 1 in the present embodiment.

  As shown in FIG. 1, the vehicle body structure 10 of the vehicle in the present embodiment is applied to a vehicle in which an engine room 7 is disposed at a front position. The vehicle body structure 10 of the automobile is provided with an intake cowl 1 in which an intake passage 3 for taking outside air into the room is formed at a position behind the engine room 7. The intake passage 3 is formed by forming a slit-shaped or mesh-shaped hole in the cowl louver 12 shown in FIG. 5 so that outside air can be taken into the front space 1 a of the intake cowl 1. From the intake passage 3 of the slit-shaped or mesh-shaped hole provided in the cowl louver 12, it is configured so that rainfall outside the vehicle body also enters. For this reason, the front space 1 a of the intake cowl 1 also functions as the rainwater discharge path 2. In order to discharge the rainwater that has entered, the rainwater discharge path 2 is formed so that the bottom surface, which is the flow lower surface of the rainwater, is inclined so that the rainwater flows outward in the vehicle width direction. In addition, the side open end of the rainwater discharge path 2 has a conventional general-purpose configuration communicating with the engine room 7.

  As shown well in FIG. 5, the intake cowl 1 is formed with a rear space 1b having a closed sectional shape (bag shape) adjacent to the front space 1a. As shown in FIG. 1, three communication holes 70 are formed in the partition member 1c between the rear space 1b and the front space 1a, and the front space 1a (rain water) is passed through the communication holes 70. The outside air taken into the discharge path 2) is taken into the rear space 1b.

In addition, the rear member 1d that forms the rear space 1b of the intake cowl 1 is formed with an outside air inlet 71 into the vehicle interior, as well shown in FIG. The outside air inlet 71 is connected to an air conditioner disposed in the vehicle compartment through a duct 72. In this embodiment, the position where the communication hole 70 and the outside air introduction port 71 are formed is a position on the so-called passenger seat side of the automobile, and both are provided at substantially the same position when viewed in the vehicle width direction. . Note that the positional relationship with the intake passage 3 formed in the cowl louver 12 is slightly shifted as viewed in the vehicle width direction. This is to prevent rainwater that has entered the front space 1 a of the intake cowl 1 through the intake passage 3 from entering the rear space 1 b through the communication hole 70. From this point of view, the lower end position of the communication hole 70 formed in the partition member 1c is formed at a position higher than the bottom surface serving as the rainwater discharge path 2, and rainwater entering the front space 1a is discharged through the rainwater discharge path 2. In this case, the rear space 1b is prevented from entering through the communication hole 70.
The communication passage 70 and the outside air introduction port 71 in the present embodiment correspond to the intake port for the intake passage in the present invention.

  As shown in FIG. 1, a one-way valve 4 configured to substantially block the rainwater discharge path 2 is provided at a downstream downstream position of the rainwater discharge path 2. The position where the one-way valve is provided is a downstream position from the communication hole 70 serving as an intake port for intake into the room. As a result, the communication path that connects the communication hole 70 and the engine room 7 can be closed at the position of the rainwater discharge path 2 where the communication hole 70 that serves as the intake intake into the vehicle interior is formed. A vehicle body structure can be configured. The one-way valve 4 is arranged so as to be open for the flow in the direction in which rainwater flows down, but closed for the flow in the opposite direction. Accordingly, it is possible to effectively prevent the hot air in the engine room 7 from being sucked into the passenger compartment while maintaining the function of the rainwater discharge path 2. Since the number of one-way valves 4 can be two at the maximum if they are arranged on both sides of the rainwater discharge path 2, it can be configured at low cost.

  As shown in FIG. 4, the one-way valve 4 includes a frame 51 having an opening 52, and a flexible member 53 that can close the opening 52 is coupled by thermal welding 54. The flexible member 53 is a single sheet-like rubber-processed molded article, and is an on-off valve that opens for a flow in the direction in which rainwater flows down, but closes for a flow in the opposite direction. 59 and the outer shape of the frame 51 are formed, and a seal portion 57 is constituted by the large formed portion. Therefore, one flexible member 53 as a configuration of the one-way valve 4 functions as an on-off valve 59 that discharges rainwater but blocks hot air in the engine room, and arrangement fixing when attached to the rainwater discharge path 2. Since it also has a function as a seal for attachment to a location, it is possible to reduce the cost in the vehicle body structure of the automobile.

  The frame body 51 is integrally formed with a support column 55 that divides and forms the opening 52, thereby forming two openings 52a and 52b. As a result, the entire opening area is formed to be relatively large, and even when an excessive negative pressure is applied, the area of each opening 52a, 52b is formed to be divided into small parts. It is possible to prevent the vehicle from being caught in the vehicle interior direction beyond the opening 52.

  The on-off valve 59 is formed by providing slits 58a and 58b in the flexible member 53 corresponding to the outside of the openings 52a and 52b. Thereby, it can form so that the on-off valve 59 can be opened and closed easily corresponding to the opening 52.

  As shown in FIG. 5, the flexible member 53 is formed to be larger than the outer shape of the frame body 51, and the seal portions 57 a, 57 b, 57 c, which are large portions, are discharged from the rainwater of the one-way valve 4. Therefore, since the flexible member 53 also functions as a part for attaching the one-way valve 4 to the rainwater discharge passage 2, the one-way valve 4 is attached. In addition to being able to be performed at a low cost, the mounting thereof is also easy.

  A one-way valve 4 is disposed between the lower end of the one-way valve 4 and the flow surface of the rainwater discharge path 2 with a 2 mm gap 6a. As shown in FIG. 5, the process management for securing the gap 6a is easy to perform when the flexible member lower end portion 53A is in an assembled state in which the flexible member lower end portion 53A is positioned about 1 mm inward from the frame lower end portion 51A in advance. The reason is that when the one-way valve 4 is arranged in the rainwater discharge passage 2 of the intake cowl 1, the lower end portion 51 </ b> A of the frame 51 is adjusted rather than adjusting the process management of the gap with the lower end portion 53 </ b> A of the flexible member 53. This is because it is easier and more accurate to perform as an index because it is less affected by an error in attaching the flexible member 53 to the frame 51.

  Since the gap 6a is secured to 2 mm, rain water on the surface of the flow surface can flow down without being hindered by surface tension. Thereby, icing / freezing that occurs near the lower end of the one-way valve 4 can be prevented. Moreover, if it is a clearance of this level, even if the hot air in the engine room 7 enters the room, there is no substantial effect on the room. Therefore, when such a gap is formed, it is possible to prevent or reduce the substantial influence due to the suction of hot air into the passenger compartment while ensuring the function of the rainwater discharge path.

  As shown in FIG. 5, the rain that has fallen on the windshield glass 75 and the engine hood 85 passes through the intake passage 3 (not shown) in the cowl louver 12 and the rainwater discharge path in the front space 1 a of the intake cowl 1. Invade 2 As shown in FIG. 1, rainwater that has entered the rainwater discharge path 2 flows down the rainwater discharge path 2, passes through the one-way valve 4 through the gap 6 a and the opening 52, and is drained. In this case, the on-off valve 59 is formed integrally with the flexible member 53 and is coupled at the upper position of the opening 52 of the frame 51 so that the lower part can be bent openably and closably with respect to the opening 52. It has become. For this reason, it becomes the structure open | released with respect to the flow of the direction in which rainwater flows down, and rainwater can be drained smoothly. On the other hand, the one-way valve 4 is arranged so as to be closed with respect to the flow in the opposite direction, so that the hot air in the engine room 7 is effectively prevented from being sucked into the passenger compartment.

  Further, although a gap 6b is generated between the cowl louver 12 and the frame 51, the seal portion 57a is applied to the cowl louver 12 by the reaction force, so that there is substantially no gap. For this reason, even when a gap is required between the one-way valve 4 and the body part such as the cowl louver in the mounting process, hot air in the engine room is prevented from entering the vehicle compartment from the gap. However, the one-way valve 4 can be easily mounted.

FIG. 7 is a perspective view of the one-way valve 4 having a portion that interferes with other members and becomes an insertion obstacle when inserted and attached to the rainwater discharge path.
The one-way valve 4 includes a frame body 51 having an opening 52 and a flexible member 53. The frame body 51 is integrally formed with a support column 55 that divides and forms the opening 52 to form two openings 52a and 52b. The flexible member 53 is provided with slits 58a and 58b, and an on-off valve 59 is formed by heat welding 54 shown in FIG. Further, the flexible member 53 is formed such that its attachment site to the rainwater discharge path 2 is larger than the outer shape of the frame body 51. In the present embodiment, as shown in FIG. 9, the upper edge and the left and right side edges are formed larger than the outer shape of the frame 51 as the seal portion 57.

  A frame flange 51a, which is a constituent part of the frame 51, is substantially in the left direction (lateral direction of the frame 51) as viewed in FIG. 7, and a frame flange 51b is substantially in the left direction (frame 51 in FIG. 7). It is a shape that protrudes toward the front). These frame flanges 51a and 51b are fixedly arranged on a vehicle body part such as a cowl louver around the rainwater discharge path as a place which does not interfere with the insertion when installed in the rainwater discharge path. Thereby, the one-way valve 4 is attached in a stable state in the rainwater discharge path. That is, even when a large amount of rainwater enters the rainwater discharge path and pressure is applied to the one-way valve, the one-way valve can exhibit a function of discharging rainwater without moving to the pressure.

  FIG. 8 is a front view seen from the back side (upstream side in the direction of rainwater flow) when the one-way valve of FIG. 7 is attached to the rainwater discharge passage. On the outside of the frame parts 51d, 51e, 51f, which are the components of the outer shape of the frame 51, there are other members 8d, 8e, 8f indicated by dotted lines in the drawing when the one-way valve 4 is inserted and attached. Interference location. Other members 8d, 8e, and 8f are arranged, and the existing interference location is formed only by the flexible member 53, and the frame 51 is removed. That is, the frame body portion 51d is inside the other member 8d, in the upper right direction of the frame body 51 as viewed in FIG. 8, and the frame body portion 51e is inside the other member 8e. It is formed so as to be inclined in the lower right direction. Further, the frame portion 51f is formed in a V-shaped concave shape inside the other member 8f. When the frame body 51 is formed in this way, when the one-way valve 4 is attached to the rainwater discharge path 2, even if the frame body 51 is formed of a rigid body, it does not become an obstacle at the time of mounting and insertion. Since the formed flexible member is bent and can be inserted when the one-way valve 4 is inserted, there is no obstacle. For this reason, even if there is another member that becomes an obstacle when the one-way valve 4 is attached to the rainwater discharge path 2, it can be reliably and easily disposed and fixed at a predetermined location.

  Seal portions 57 d, 57 e, 57 f, 57 g of the flexible member 53 are locations formed outside the frame body 51. In particular, since the seal portion 57d is a portion where the interference portion of the other member 8d described above exists, the seal portion 57d is formed large on the outside in consideration of the interference portion. Similarly, the seal part 57e is also a part where the interference part of the other member 8e described above exists, and is thus formed large on the outside in consideration of the interference part. Further, as shown in FIG. 8, the seal portion 57f is formed on the outer side in consideration of the interference portion because the right portion is a portion where the interference portion of the other member 8f exists. Since there is no other interference member, it is formed in a shape that takes into account only the attachment width to the rainwater discharge path 2. Similarly, since there is no other interference member, the seal portion 57g is formed in a shape that takes into account only the attachment width to the rainwater discharge path 2. These seal parts 57d, 57e, 57f, and 57g are applied to the attachment surface of the rainwater discharge path 2 and attached without a gap.

  FIG. 9 is a front view seen from the insertion side (downstream side in the rainwater flow direction) when the one-way valve 4 of FIG. 7 is attached to the rainwater discharge path 2. In this case, as seen in FIG. 9, the rear direction is the outside air introduction side into the vehicle interior, and the front direction is the fender side from which rainwater is discharged. In such a vehicle body structure, when rainwater entering from the intake cowl 1 flows down from the outside air introduction side through the rainwater discharge path 2 to the downstream side of the rainwater discharge path 2, the on-off valve 59 flows in the direction of the rainwater flowing down. It is open to the flow of water and drains rainwater. On the other hand, since the on-off valve 59 is restrained by the lower end 51A of the frame body and the partition member 55, it closes against the movement of fluid in the direction from the fender side to the outside air introduction side. Therefore, the introduction of hot air generated in the engine room 7 into the vehicle compartment can be blocked, and the ventilation function can be achieved when the outside air is introduced into the vehicle compartment.

  Further, the flexible member lower end portion 53A is in an assembled state in which the flexible member lower end portion 53A is positioned about 1 mm from the frame lower end portion 51A as viewed in FIG. Accordingly, when a gap is formed between the lower end of the one-way valve and the flow surface of the rainwater discharge path, process management of the gap is facilitated.

  FIG. 10 shows a basic schematic configuration of a vehicle body structure of an automobile, in which the one-way valve 4 need only be arranged at one location. In the automobile body structure 10 shown in FIG. 10, the outside air inlet 71 is provided only on the left side as viewed in FIG. 10 from the central position of the intake cowl 1 formed in the vehicle width direction. In addition, a partition member 5 that blocks the rainwater discharge path 2 is formed at a central position of the rainwater discharge path 2 formed in the intake cowl 1. Accordingly, even if hot air is accumulated in the intake cowl 1 on the right side of the partition member 5 as viewed in FIG. 10, the hot air in the left intake cowl 1 does not enter the vehicle interior. Therefore, it is sufficient to arrange one unidirectional valve 4 only at one location downstream of the rainwater discharge passage 2 on the left side where the outside air inlet 71 is provided. For this reason, the number of one-way valves 4 used can be minimized, and the vehicle body structure of an automobile can be configured at a lower cost.

  Further, a heat insulating material 73 is attached to the bottom surface of the intake cowl 1 on the left side of the partition member 5 as viewed in FIG. Thereby, the temperature rise in the intake cowl 1 of the outside air taken into the vehicle interior can be effectively prevented. That is, the outside air is warmed by the radiant heat of the engine room 7 when passing through the intake cowl 1, but can be prevented by the heat insulating material 73. In this embodiment, since the outside air is taken in by the partition member 5 only in the left half as viewed in FIG. 10, the radiant heat can be obtained without attaching the heat insulating material 73 to the entire bottom surface of the intake cowl 1. It is possible to prevent an increase in the temperature of the outside air around the outside air introduction port 71 simply by attaching it to the position of the left half having the influence of. Therefore, the usage amount of the heat insulating material 73 can be reduced accordingly, and the cost can be reduced.

  The vibration noise in the engine room 7 is propagated into the vehicle compartment through the communication hole 70 and the outside air introduction port 71 formed in the intake cowl. This propagation is also effectively prevented or reduced by the heat insulating material 73. The heat insulating material 73 is not disposed in the right half position and the vibration noise of the engine room 7 is transmitted to the intake cowl 1, but is not transmitted to the vehicle interior because it is not formed in the vehicle interior. Never happen.

The present invention is not limited to the configuration of the above embodiment, and can be implemented in various other forms.
For example, the rainwater drainage channel can be completely closed by the one-way valve 4 without providing a predetermined gap between the lower end of the oneway valve 4 and the flow surface of the rainwater discharge channel. Even in such a configuration, there is no problem in an automobile used outside a so-called cold region.
Further, in the above-described embodiment, the one-way valve 4 is formed with the support column 55 that divides and forms the opening 52. However, the one-way valve that does not include the support column 55 and has one opening 52 may be used. In such a case, there is an advantage that the frame 51 can be configured simply.

It is a perspective view shown in the state where the engine hood was removed in the body structure of an automobile with the basic schematic configuration common to the present invention and another improvement plan. It is sectional drawing cut | disconnected along the AA line of FIG. It is a perspective view which extracts and shows the state in which the foaming sealing material was attached to the one-way valve in FIG. It is a perspective view which shows the one-way valve | bulb used by this Embodiment. It is sectional drawing of the one-way valve | bulb cut | disconnected along the AA line of FIG. It is sectional drawing of the one-way valve | bulb cut | disconnected along the BB line of FIG. It is a perspective view which shows the one-way valve | bulb formed except the frame location which interferes with another member and becomes an insertion obstruction. It is a front view which shows the relationship between the one way valve | bulb and other members seen from the back side, when inserting and attaching the one way valve | bulb of FIG. 7 to a rainwater discharge path. FIG. 8 is a front view of the one-way valve as viewed from the insertion side when the one-way valve in FIG. 7 is attached to the rainwater discharge passage. It is a figure which shows the basic model structure of the vehicle body structure of the motor vehicle which only needs to arrange | position a one-way valve in one place. It is a perspective view which shows typically the state by which the engine hood was removed by the basic schematic structure of the conventional vehicle body structure. It is the schematic cross section which looked at FIG. 11 from the front of the car. It is a perspective view which shows typically the state by which the engine hood was removed by the basic composition of the conventional vehicle body structure of the improved automobile. It is the schematic cross section which looked at FIG. 13 from the front of the car.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Intake cowl 2 Rainwater discharge path 3 Intake path 4 One-way valve 5 Partition member 6a Clearance 7 Engine room 10 Car body structure 12 Cowl louver 41 Frame body 51 Frame body 52 Opening 53 Flexible member 55 Strut 57 (57a-57g) Sealing part 59 On-off valve 70 Communication hole (intake of intake passage into the room)
71 Outside air inlet (inlet of intake passage into the room)
81 Fender 83 Tire

Claims (3)

An intake cowl formed with an intake passage that allows intake of the outside air into the interior of an automobile in which the engine room is disposed at the front position, and discharges rainwater that has entered through the intake passage. In the vehicle body structure of the automobile, the rainwater discharge path is arranged to be inclined so that rainwater flows downward in the vehicle width direction at the bottom of the intake cowl, and the rainwater discharge path is configured to communicate with the engine room.
A one-way valve configured to substantially block the rainwater discharge path at a position downstream of the rainwater discharge path from the intake opening of the intake passage into the room;
The one-way valve includes a frame body having an opening and a flexible member capable of closing the opening of the frame body, and a lower end portion of the flexible member is an inner side from a lower end portion of the frame body. It is in the assembled state located in, and is arranged as a configuration that opens to the flow in the direction in which rainwater flows down, but closes to the flow in the opposite direction,
Site location for placing fixed to rainwater discharge path of the one-way valve, the flexible member is formed larger than the outer shape of the frame, sealing the gap between the rainwater discharge passage at a place where it has been the large-out Ku formed A structure to
A predetermined gap is formed between the lower end of the frame of the one-way valve disposed in the rainwater discharge path and the flow surface of the rainwater discharge path, and the predetermined gap is rainwater on the surface of the flow surface. Is a gap that can flow down without being hindered by surface tension, and even if hot air in the engine room enters the room, it is a gap that does not cause a substantial effect in the room. Construction. The vehicle body structure according to claim 1,
A vehicle body structure for an automobile, wherein a slit corresponding to the outside of the opening of the frame is provided in the flexible member, and an opening / closing valve is formed by the slit. The vehicle body structure according to claim 1 or 2,
The outer shape of the frame of the one-way valve is formed except for a portion that interferes with other members during insertion when the one-way valve is inserted into the rainwater discharge path and is attached, An automobile body structure characterized in that the interference portion is formed only of a flexible member.

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