JP6507005B2 - Hood seal mounting structure for car - Google Patents

Description

  The present invention relates to a mounting structure of a hood seal which is mounted on the upper surface of a front bumper of a car and which seals between the front end of the hood when the hood is closed when the hood abuts.

  There are hood seals (sometimes referred to as hood weather strips or hood seal rubbers) that seal between the engine hood (bonnet) and the front end of the engine room, and those of the type mounted on the engine hood side, and the engine There is a radiator core support in a room and a type mounted on a part of a front bumper including a head lamp, and the latter type of hood seal is proposed in, for example, Patent Document 1.

  Further, as a hood seal of a type mounted on a radiator core support at the front end of an engine room, Patent Document 2 proposes that a stopper portion is integrally formed to prevent a so-called overstroke when the engine hood is closed.

  On the other hand, due to the peculiarities of modeling of the front part of the vehicle body or the front bumper, as shown in FIG. 4, the vertical wall surface 31b rising relatively large from the mounting surface 31a on the front side of the flat mounting surface 31a The hood seal 32 is attached to the inner corner portions of both the mounting surface 31a and the vertical wall surface 31b. Here, by using the double-sided adhesive tape 33 and the clip 34 in combination, the base portion 35 of the hood seal 32 is attached along both the mounting surface 31a and the vertical wall 31b on the front bumper 31 side. The front end edge 36a of the engine hood 36 is brought into contact with the seal lip 37 which is extended from the upper end of the base portion 35 and sealed.

Unexamined-Japanese-Patent No. 5-301547 JP 2007-38988 A

  However, although the structure of the hood seal 32 shown in FIG. 4 basically assumes the structure described in Patent Document 1, when the engine hood 36 is closed, the seal lip 37 of the cantilever type is used. Only the front end edge 36a of the engine hood 36 abuts in the form of line contact, and not only the vibration of the engine hood 36 can not be sufficiently suppressed, but also the sound insulation is not sufficient.

  Also, if the engine hood 36 over-strokes when it is closed, the front end edge 36a of the engine hood 36 bounces up the cantilever seal lip 37, thereby causing the seal lip 37 to pop out or stick out. As a result, the seal lip 37 may be reversed. For example, as shown in FIG. 4, when the engine hood 36 momentarily overstrokes to the position P1 and then returns to the normal position shown by the solid line, the front end portion of the engine hood 36 signs the seal lip 37 by the inertia force. As indicated by 37a, the engine hood 36 may be repelled, and even if the seal lip 37 is restored thereafter, the seal lip 37 may run over the front end of the engine hood 36, as indicated by 37b.

  Moreover, in the structure of the hood seal 32 shown in FIG. 4, in view of the formation of the front bumper 31, in many cases, the portion along the vertical wall 31b is assembled so as to have a smooth convex shape toward the front side. However, since the rising amount of the portion along the vertical wall surface 31b in the base portion 35 is large, the portion corresponding to the outer side of the root portion of the seal lip 37 may be corroded, which may deteriorate appearance quality due to deterioration in appearance There is.

  Furthermore, although it is possible to use the stopper portion described in Patent Document 2 in combination as a countermeasure for overstroke when the engine hood 36 is closed, the depth to the mounting surface 31 a of the front bumper 31 is large as described above. In addition, the height of the stopper needs to be increased accordingly. The reaction force adjustment becomes more troublesome as the height of the stopper increases, and the closing property of the engine hood 36 deteriorates if the reaction of the stopper is too large, while the stopper decreases if the reaction of the stopper is too small. There is a contradictory problem that it can not exert its original function.

  The present invention has been made in view of such problems, and in the case where a vertical wall surface which rises relatively largely from the mounting surface is formed on the front side of the mounting surface on the upper surface of the front bumper, The present invention provides a hood seal mounting structure suitable for mounting along a vertical wall surface.

  The present invention is mounted on a top surface of a front bumper of a car, and a hood seal mounting structure for sealing between the front end of the hood when the hood is closed when the hood is closed, wherein the hood seal is a mounting surface of the top surface of the front bumper And a vertical wall surface rising from the front side of the mounting surface, and at the time of closing the hood, it is deformed so as to be within the height range of the vertical wall surface to exhibit a sealing function. There is.

Further, the hood seal is formed on a base portion fixed to the mounting surface, a stopper portion projecting upward from the front end portion of the base portion and having a flat upper surface, and an upper surface front end portion of the stopper portion It is upwardly protruded, and an intermediate base that sits on at least the upper end portion of the vertical wall, is extended and formed in a length that fits within the width of the stopper portion toward the rear side from the intermediate base portion, the hood during closing of the hood and the seal lip of the front end abutting the rear end and deformed by the cantilevered abutting the stopper portion, and formed in a corner portion between the mounting surface and the vertical wall of the front bumper side of the stopper portion the portion facing the relief recess within which is formed so as not to interfere with the corner the, is interposed between the mounting face of the front bumper side and base over scan portion, the stopper portion and overlaps with the front-rear direction Both And the pressure-sensitive adhesive tape, that features a.
Then, the stopper portion is characterized der Rukoto those overlay formed stepwise between and the base portion and the intermediate base in thicker than the base portion and the intermediate base.

Desirably, as described in claim 2, the total length in the front-rear direction of the bonding surface on the stopper portion side with respect to the mounting surface overlaps with the double-sided adhesive tape, and, further, as described in claim 3, It is assumed that a space is formed between the seal lip and the upper surface of the stopper when the hood is closed .

Furthermore, on the premise that a clip is used in combination with the double-sided adhesive tape, as described in claim 4 , the hood is inserted by the clip inserted into the base in the form used in combination with the double-sided adhesive tape. Preferably, the seal is fixed to the front bumper, and a stopper is formed on the front side of the position of the clip mounting hole in the base.

  Therefore, according to at least the first aspect of the present invention, when the hood is closed, the seal lip bends and deforms toward the stopper due to the abutment of the front end of the hood, and the seal lip is formed between the hood front end and the stopper As a result, the front end of the hood comes in surface contact with the seal lip to seal between the front end of the hood and the front bumper.

  In addition, when the hood overstrokes when the hood is closed, further movement of the hood is restricted by the stopper to prevent the front end of the hood from interfering with part of the front bumper. Become.

According to the present invention, when the hood is closed, the seal lip is sandwiched between the front end of the hood and the stopper, and the front end of the hood is in surface contact with the seal lip. The vibration suppressing effect and the sound insulation are improved, and the seal lip does not protrude outside, so that the appearance of the hood seal can be improved and the original function of the hood seal can be surely exhibited. This trend, the end after the sealing lip during closure of the off over de becomes more prominent by abutting the stopper portion.

  Further, since the intermediate base sitting on the vertical wall on the front bumper side is shorter than the depth of the vertical wall, the intermediate base along the vertical wall has a smooth convex shape toward the front side. Even if assembled in such a way as to be as described above, the appearance quality is not impaired since no corrugation occurs in the portion concerned.

  Furthermore, the stopper portion is located immediately below the seal lip, and when the hood over-strokes, the front end of the hood abuts against the stopper portion via the seal lip so as to restrict further movement of the hood. Therefore, it is not necessary to make the height of the stopper portion extremely large, and the reaction force adjustment becomes easy.

Moreover, the double-sided adhesive tape interposed between the mounting surface on the front bumper side and the hood seal overlaps the stopper part, so that the pressing force at the time of overstroke of the hood compensates for the pressure-bonding force of the double-sided adhesive tape As a result, the bonding strength of the hood seal with the double-sided adhesive tape is further improved. In particular, when the total length of the stopper portion in the front-rear direction overlaps the double-sided pressure-sensitive adhesive tape as described in claim 2, the effect of improving the bonding strength becomes more remarkable.

In addition, since the relief recess is formed in a part of the stopper portion, although the relatively thick stopper portion is formed, the inner corner portion formed by the mounting surface on the front bumper side and the vertical wall surface In particular, the hood seal can faithfully follow the vertical wall surface.

According to the invention as set forth in claim 4 , the stopper portion is formed on the front side of the clip mounting hole position in the base portion. Therefore, when forming the clip mounting hole in the base portion in the manufacturing process of the food seal Since the upper part of the stopper part is higher than the above-mentioned clip mounting hole position, the roller etc. roll on the upper surface of the stopper part and the pressure is applied to the double-sided adhesive tape. never clip inserted into the clip hole even when exerted by an obstacle.

Front perspective view of the front of the car. FIG. 2 is a view showing a specific embodiment of the hood seal attachment structure according to the present invention, and is an enlarged cross-sectional view along the line A-A of FIG. The expanded sectional view at the time of engine hood closing which followed the AA line of Drawing 1 similarly. Sectional explanatory drawing which shows an example of the conventional food | hood seal | sticker.

  1 to 3 show a more specific embodiment for implementing the hood seal mounting structure for an automobile according to the present invention, FIG. 1 is a front perspective view of the front of the automobile, and FIGS. 1 also show enlarged cross-sectional views taken along the line A-A of FIG. FIG. 2 shows a free state of the hood seal when the hood is open, and FIG. 3 shows a state when the hood seal is bent and deformed when the hood is closed.

  In FIG. 1, reference numeral 1 denotes a front bumper disposed on the front side of an engine room of a vehicle body, and reference numeral 2 denotes an engine hood which covers the engine room. Further, 3 is a grill for decoration provided at the center of the front bumper 1 and 4 is a headlamp.

  As shown in FIGS. 2 and 3, as is well known, the engine hood 2 is an integral unit of the hood outer panel 2a and the hood inner panel 2b by hemming joint, and the paint seal 2c is applied to the hemming joint of the both. Be done. Further, as shown in FIGS. 2 and 3 as well as in FIG. 1, the hood seal 5 is disposed along the longitudinal direction (vehicle width direction) of the front bumper 1, and the general part that occupies most of the longitudinal direction is the engine hood 2. Extending along the tip, both ends of the general part extend along the headlamp 4. And FIG.2, 3 has shown sectional drawing of the general part of the food | hood seal | sticker 5. FIG.

  As shown in FIG. 2, the front bumper 1 has a flat mounting surface 1a on the upper surface and a vertical wall surface 1b rising from the front side of the mounting surface 1a with an inclined surface, due to its molding peculiarities. The hood seal 5 is disposed so as to straddle the surface 1a and the vertical wall 1b. Then, as shown in FIG. 3, when the engine hood 2 is closed, the front end 2d of the engine hood 2 is in close proximity with the top 1c on the flon bumper 1 side with a predetermined parting gap. Therefore, as described later, the tip 2d of the engine hood 2 abuts on the seal lip 8, and the seal lip 8 is bent and deformed so as to be within the height range of the vertical wall surface 1b. The seal function is to be exhibited.

  As shown in FIG. 2, the hood seal 5 is integrally formed with a plate-like base portion 6 disposed in the vehicle width direction along the mounting surface 1 a on the front bumper 1 side, and is integrally formed with the base portion 6. An intermediate base 7 seated on at least the upper end of the vertical wall 1b, and a so-called cantilevered seal lip 8 integrally formed in a substantially bow shape extending from the intermediate base 7 to the rear side; And a stopper portion 9 formed in a step-like manner in an inner corner portion formed between the base portion 6 and the intermediate base 7 at a thickness thicker than the base portion 6 and the intermediate base 7 and at a height lower than the intermediate base 7. And are formed from.

  The thickness of the intermediate base 7 is set smaller than that of the base 6, and the thickness of the stopper 9 is set to an extreme thickness several times larger than that of the base 6. The upper surface of the flat surface is a flat surface parallel to the base 6.

In addition, a relatively large clearance recess as a gap portion so as not to interfere with the inner corner portion of the extremely thick stopper portion 9 facing the inner corner portion formed by the mounting surface 1a on the front bumper 1 side and the vertical wall surface 1b. 10 is formed. Thus, substantially the intermediate base 7 protrude obliquely upward from the upper surface edge portion of the stopper portion 9, the projecting length is approximately half the height of the vertical wall surface 1b, the upper end of the result to the longitudinal wall 1b The intermediate base 7 is seated only on the seat.

  As the material of the food seal 5, for example, EPDM (ethylene-propylene-diene rubber) or TPV (dynamically crosslinkable olefin-based thermoplastic elastomer) is used, and the seal lip 8 is a foam-based or sponge-based soft material. While being formed, the other base part 6 and stopper part 9 grade | etc., Are formed with what is called hard solid material.

  The double-sided adhesive tape 11 is attached to the back surface side of the stopper portion 9, and the hood seal 5 is fixed to the mounting surface 1 a via the double-sided adhesive tape 11. At the same time, in addition to the double-sided adhesive tape 11, the clip 12 is used in combination as a means for fixing the hood seal 5 to the front bumper 1 and along the longitudinal direction in the base 6 behind the stopper 9 A plurality of clip attachment holes 13 are formed to coincide with the attachment holes 14 on the front bumper 1 side at a predetermined pitch. The hood seal 5 is also firmly fixed to the front bumper 1 by the clips 12 inserted into the mounting holes 13 and 14.

  In FIGS. 2 and 3, the entire length of the back surface of the stopper portion 9 in the front-rear direction overlaps the double-sided adhesive tape 11, but a part of the entire length of the back surface of the stopper portion 9 in the front-rear direction And the adhesive force of the double-sided adhesive tape 11 can be obtained.

  In addition, a radiator core support cover 15 is covered on a radiator core support (not shown) adjacent to the front bumper 1, and a part of the radiator core support cover 15 is the base portion 6 of the hood seal 5. Extended to the upper surface side of the cover 12 to cover the head of the clip 12. Thereby, a sense of unity between the hood seal 5 and the radiator core support cover 15 is obtained, and the appearance at the time of opening the engine hood 2 is improved.

  Furthermore, a substantially trapezoidal protrusion 1c is formed on the rear end side of the mounting surface 1a of the front bumper 1, and this protrusion 1c is used as a positioning reference when attaching the hood seal 5 to the mounting surface 1a. .

  Therefore, in the structure of the hood seal 5 configured as described above, when the front end 2 d of the engine hood 2 abuts on the seal lip 8 in the closed state of the engine hood 2 shown in FIG. At the same time, the distal end of the seal lip 8 abuts on the stopper 9 while being bent and deformed from the root to the intermediate base 7 so as to be within the height range. Therefore, an arc-shaped portion having a predetermined curvature at the front end 2d of the engine hood 2 comes into surface contact with the seal lip 8, and between the engine hood 2 and the front bumper 1 ie the inside and outside of the engine room are sealed It will be

In this case, the sealing lip 8 despite those cantilevered tip of the seal lip 8 at the time of bending deformation by the abutment of the engine hood 2 as described above is also brought into contact with the stopper portion 9, the sealing lip 8 Since it becomes a form like a hollow seal lip between stopper parts 9, the reaction force increase effect of seal lip 8 can be expected, and it can contribute to the improvement of seal performance. Particularly when bending deformation of the sealing lip 8 as shown in FIG. 3, it is possible that the engine hood 2 by the vehicle two vibrations also effectively damping or absorbing the vibration as the vibration, sound insulation in the engine room and out Improvement effects can also be expected.

  When the engine hood 2 is closed, the engine hood 2 overstrokes more or less, but when the engine hood 2 is overstroked, the tip 2d of the engine hood 2 remains in contact with the seal lip 8 and stops the seal lip 8 It is in the form of being seated on the stopper portion 9 via the seal lip 8 so as to be sandwiched between the portion 9. Therefore, the movement of the engine hood 2 is further restricted by the stopper portion 9 and the engine hood 2 is finally restored to the position shown in FIG.

  In this case, when the engine hood 2 is overstroked, the seal lip 8 is momentarily pressed against the stopper portion 9 with an excessive deformation tendency, but the front end 2 d of the engine hood 2 is sealed lip 8 by the stopper portion 9. Of the seal lip 8 as in the prior art can be prevented in advance.

  Furthermore, at the time of the over-stroke of the engine hood 2 as described above, the tip 2d of the engine hood 2 abuts against the stopper portion 9 each time to press the stopper portion 9 against the mounting surface 1a on the front bumper 1 side. This behavior is nothing but pressing the stopper portion 9 to the mounting surface 1a via the double-sided adhesive tape 11, and as a result, the bonding force by the double-sided tape 11 is further improved.

  In addition, since the relief recess 10 is formed in a portion of the stopper portion 9 facing the inner corner portion on the front bumper 1 side, for example, the vertical wall surface 1b is smoothly curved so as to be convex toward the vehicle front side. If the hood seal 5 including the thick-walled stopper portion 9 faithfully follows the convex vertical wall surface 1b, a gap may be generated between the vertical wall surface 1b and the intermediate base 7 Can be prevented in advance.

  Moreover, since the protruding height of the intermediate base 7 is smaller than the depth of the vertical wall 1b, no waving occurs at the root of the seal lip 8 extending from the intermediate base 7 in close contact with the vertical wall 1b. Looks better.

  Here, an outline of a manufacturing procedure and an assembling procedure of the hood seal 5 will be described.

  After the general part of the food seal 5 is extruded as a long piece having a uniform cross-sectional shape as shown in FIG. 2 and cut into a predetermined length, the same is applied to both ends in the longitudinal direction in a molding step not shown. Terminals not shown are molded and integrated. After that, a clip attachment hole 13 shown in FIGS. 2 and 3 is punched and formed in the base portion 6 by a punching machine, and a double-sided adhesive tape 11 with release paper is stuck on the back surface of the base portion 6 including the stopper portion 9 It will be

  In this case, since the stopper portion 9 is formed on the front side of the drilling position of the clip attachment hole 13, the stopper portion 9 does not disturb the drilling of the clip attachment hole 13.

  When the hood seal 5 is attached to the front bumper 1, the clips 12 are inserted after the attachment holes 14 on the front bumper 1 side and the clip attachment holes 13 formed in the base portion 6 of the hood seal 5 are aligned. The hood seal 5 is primarily fixed to the front bumper 1.

  Furthermore, after peeling off the release paper of the double-sided adhesive tape 11 previously attached to the hood seal 5 side, the food seal 5 is adhesively fixed to the mounting surface 1 a on the front bumper 1 side via the double-sided adhesive tape 11 For example, the pressing jig roller is rolled on the upper surface of the stopper portion 9 to apply a pressing force, whereby bonding by the double-sided adhesive tape 11 is ensured. At that time, since the height position of the upper surface of the stopper portion 9 is made higher than the height position of the head of the clip 12, the head of the clip 12 does not get in the way, and the rotation by the pressing jig roller You can move smoothly.

DESCRIPTION OF SYMBOLS 1 ... Front bumper 1a ... Mounting surface 1b ... Vertical wall surface 2 ... Engine hood 2d ... Engine hood tip 5 ... Hood seal 6 ... Base part 7 ... Intermediate base 8 ... Seal lip 9 ... Stopper part 10 ... Relief recess 11 ... Double-sided adhesive tape 12 ... clip

Claims (4)

In a mounting structure of a hood seal which is mounted on the upper surface of a front bumper of a car and which seals between the front end of the hood when the hood is closed when the hood abuts.
The hood seal,
It is arranged across the vertical wall surface rising from the front side of the mounting surface and the mounting surface of the upper surface of the front bumper, and deformed to fit within the height of the vertical wall surface when hood closed sealing function While being able to demonstrate,
A base portion fixed to the mounting surface;
A stopper having a flat upper surface, which is formed to project upward at the front end of the base;
An intermediate base which is formed to project upward from the front end of the upper surface of the stopper portion and which is seated on at least the upper end of the vertical wall;
The intermediate base from being extended and formed in a length that fits within the width of the stopper portion toward the rear side, the front end of the hood when the hood closure abuts the stopper portion rear end and deformed by contact a cantilevered sealing lips of the contact,
A relief recess formed so as not to interfere with the inner corner portion at a portion facing the inner corner portion formed by the mounting surface on the front bumper side and the vertical wall surface among the stopper portions .
Is interposed between the mounting surface and base over scan portion of the front bumper side, a double-sided adhesive tape which overlaps with the stopper portion in the longitudinal direction,
The equipped,
The stopper portion is Mounting hood seal of a motor vehicle, characterized in der Rukoto those overlay formed stepwise between and the base portion and the intermediate base in thicker than the base portion and the intermediate base Construction.   2. The hood seal mounting structure for an automobile according to claim 1, wherein the total length of the joint surface on the stopper side with respect to the mounting surface overlaps with the double-sided adhesive tape. 3. The hood seal mounting structure according to claim 2, wherein a space is formed between the seal lip and the upper surface of the stopper when the hood is closed . In combination with the double-sided adhesive tape, the hood seal is fixed to the front bumper by the clip inserted into the base,
The hood seal mounting structure for an automobile according to claim 3, wherein a stopper portion is formed on the front side of the position of the clip mounting hole in the base portion .

Images