JP6135592B2 - Engine cover - Google Patents

Description

  The present invention relates to an engine cover that covers an engine member of a vehicle.

  The engine cover is a member that covers an engine member including an engine, a cylinder head cover, and the like. Since the engine cover is interposed between the engine member and the outside of the engine member, noise leaking from the engine to the outside is reduced, or heat transfer from the engine member to the outside (for example, the vehicle interior) is hindered. Or

  The engine cover generally has a cover member, a backing member, and an adhesive member. The cover member is directly or indirectly attached to the engine member. The backing member is attached to the back surface of the cover member by an adhesive member. That is, the backing member and the adhesive member are interposed between the engine member and the cover member, and the adhesive member is interposed between the cover member and the backing member. The cover member is a relatively rigid member made of resin, metal, or the like. The backing member is generally composed of a porous material such as polyurethane foam, and mainly serves functions such as sound insulation and heat insulation. In general, a double-sided tape is used as the adhesive member (see, for example, Patent Document 1).

  Since the cover member is required to have relatively high rigidity, a rib portion for reinforcement is generally provided on the back surface of the cover member (see, for example, Patent Document 2). However, in this case, the rib portion and the adhesive member may interfere with each other, and it may be difficult to bond the backing member and the cover member with high adhesiveness. That is, the cover member is often provided with a large number of ribs, and the back surface of the cover member often has a very complicated uneven shape. In addition, it is difficult to cause the adhesive member to follow the complicated uneven shape, and the cover member and the backing member may not be sufficiently bonded in the vicinity of the rib portion.

JP 2009-281341 A JP 2007-255190 A

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an engine cover in which a cover member and a backing member are integrated with an adhesive member with high adhesiveness.

An engine cover of the present invention that solves the above problems includes a cover member that includes a cover part that covers at least a part of an engine member of a vehicle, and a rib part that is formed to protrude from the back side of the cover part.
A backing member disposed on the back side of the cover member;
Interposing between the cover member and the backing member, and having a sheet-like adhesive member that adheres to the cover member and the backing member,
The adhesive member has a broken portion broken by the rib portion.

The engine cover of the present invention preferably includes any of the following (1) to (3), and more preferably includes a plurality of (1) to (3).
(1) The adhesive member has a general part and an easily breakable part having a lower strength than the general part in a state before being bonded to the cover member,
The breakable portion is formed by breaking the easily breakable portion.
(2) The easily breakable portion includes a break.
(3) The rib portion has a tapered shape.

An engine cover manufacturing method of the present invention that solves the above problems is a method of manufacturing any of the above engine covers,
A preparation step of attaching the adhesive member to one of the cover member and the backing member;
After the preparation step, the cover member and the backing member are brought close to each other, and the adhesive member is adhered to the cover member and the backing member, while the fracture bonding step of breaking the adhesive member at the rib portion, It is a method provided with.

  According to the engine cover manufacturing method of the present invention, the cover member and the backing member can be bonded with high adhesiveness. In the engine cover of the present invention, the cover member and the backing member are bonded with high adhesiveness.

It is a rear view which represents typically the engine cover of Example 1, and the cover member in the manufacturing method. It is a perspective view which represents typically the engine cover of Example 1, and the backing member in the manufacturing method. It is a principal part expansion perspective view which represents typically the engine cover of Example 1, and the adhesive member in the manufacturing method. FIG. 2 is a cross-sectional view schematically illustrating a state in which the engine cover according to the first embodiment is cut at a position XX in FIG. 1. It is a principal part expanded sectional view which represents the conventional engine cover typically. It is a principal part expansion perspective view which represents typically the engine cover of Example 2, and the adhesive member in the manufacturing method. It is a principal part expansion perspective view which represents typically the engine cover of Example 3, and the rib part in the manufacturing method. It is a principal part expanded sectional view which represents typically the engine cover of Example 4, and the rib part in the manufacturing method.

  The engine cover of the present invention may be attached to the engine, or may be attached to an engine member other than the engine (for example, a cylinder head cover). The cover member may cover the engine member, may cover the upper surface of the engine member, may cover the side surface, or may cover two or more surfaces. As a material for the cover member, it is preferable to use a material having excellent sound insulation characteristics, and a resin material can be preferably used. More preferably, polyamide (PA) and / or polypropylene (PP) is used.

  The rib portion may be integrally formed with the cover portion, or may be formed separately from the cover portion and then integrated with the cover portion by a method such as welding or adhesion. In consideration of ease of manufacture, the rib portion and the cover portion are preferably integrally formed. The rib part may be the same material as the cover part or may be a different material.

  The backing member may cover the entire back surface of the cover member, or may cover only a part of the back surface of the cover member. The material and shape of the backing member may be appropriately selected according to the use of the engine cover. For example, in order to give sound absorption, heat insulation, and shock absorption to the engine cover, it is preferable that the backing member is made of a porous body that can be elastically deformed. Specifically, as a material for the backing member, at least one selected from foamed polyurethane (so-called urethane foam), polyethylene terephthalate (PET), natural fiber, and synthetic fiber is selected. It is better to make it felt.

  The backing member preferably has a shape corresponding to the back surface of the cover member. This is because the space between the cover part and the backing member is reduced as much as possible to improve the adhesion between the cover member and the backing member. If the backing member is very soft, if the backing member is attached to the back surface of the cover portion while the backing member is deformed into a shape corresponding to the back surface of the cover portion, the cover portion and the backing member The space between can be made sufficiently small. Therefore, in this case, the backing member does not need to have a shape corresponding to the back surface of the cover portion.

  When the backing member is not so soft, a concave portion having a shape corresponding to the rib portion of the cover member is provided on a surface of the backing member that faces the cover portion (referred to as an adhesive surface of the backing member). It is preferable. The concave portion may be a through hole, but in consideration of the sound absorption property of the backing member, it is preferably a dead end hole.

  The adhesive member may be any member that has a sheet shape and can be bonded to the cover member and the backing member. For example, a double-sided tape can be used as the adhesive member. Here, the sheet shape is a concept including a film shape, a tape shape, a plate shape and the like. That is, the thickness and width of the adhesive member are not particularly limited. Further, the adhesive member may be interposed between the backing member and the cover member, and may be present between the backing member and the cover member, or between the backing member and the cover member. It may exist only in the part.

  Hereinafter, the engine cover and the manufacturing method thereof according to the present invention will be described with specific examples.

Example 1
FIG. 1 is a rear view schematically showing the engine cover of the first embodiment and the cover member in the manufacturing method thereof. FIG. 2 is a perspective view schematically showing the engine cover of Example 1 and a backing member in the manufacturing method thereof. FIG. 3 shows an enlarged perspective view of main parts schematically showing the engine cover of the first embodiment and the adhesive member in the manufacturing method thereof. Note that the adhesive member shown in FIG. 3 is not bonded to the cover member or the backing member. That is, the adhesive member shown in FIG. 3 is the one before breaking. FIG. 4 is a cross-sectional view schematically showing a state where the engine cover of Example 1 is cut at the position XX in FIG. FIG. 5 shows an enlarged cross-sectional view of a main part schematically showing a conventional engine cover. Hereinafter, in this specification, the front side and the back side refer to the front side and the back side shown in FIGS.

  The engine cover of Example 1 includes a cover member 1, a backing member 3, an adhesive member 5, and a grommet 7.

  The cover member 1 is made of polyamide and is an integrally molded product by injection molding. The cover member 1 has a cover part 10, a rib part 15, and an attachment frame part 20. The cover portion 10 has a substantially plate shape, and a rib portion 15 and a mounting frame portion 20 are formed on the back surface 11 side of the cover portion 10 as shown in FIG. The rib portion 15 is composed of a plurality of standing walls combined in a lattice shape. The attachment frame portion 20 has a frame shape that opens to the back surface side and the side surface side (that is, the direction orthogonal to the back surface side) of the cover portion 10, and the grommet 7 is inserted and held inside the attachment frame portion 20. Inserted into the grommet 7 is the tip of a mounting pin protruding from a cylinder head cover (not shown). Therefore, the engine cover is attached to the cylinder head cover (not shown) by the mounting pin (not shown), the grommet 7 and the attachment frame portion 20, and covers the upper surface of the cylinder head cover.

  The backing member 3 is made of polyurethane foam and is disposed on the back side of the cover member 1 as shown by a two-dot chain line in FIG. As shown in FIG. 2, the backing member 3 has a slit-like recess 30 corresponding to the rib portion 15 of the cover member 1.

  The adhesive member 5 is made of a double-sided tape in which an adhesive layer is laminated on both sides of a nonwoven fabric. As shown in FIG. 3, the adhesive member 5 is provided with easily breakable portions 50 at positions corresponding to the rib portions 15 and the recessed portions 30. The easily breakable portion 50 has a perforated shape in which a plurality of cut lines 51 are arranged linearly and intermittently. Therefore, the easily breakable portion 50 has a lower strength than other portions (that is, the general portion 55) and is easily broken. The length of the cut line 51 is about 3 mm, and the distance between the adjacent cut lines 51 is about 2 mm. In consideration of the ease of breaking the easily breakable portion 50, the length of the cut 51 is preferably 2.5 mm to 3.5 mm, and the distance between adjacent cuts 51 is 1.5 mm to 2.5 mm. Preferably there is. More preferably, the length of the cut line 51 is 2.9 mm to 3.1 mm, and the distance between the adjacent cut lines 51 is 1.9 mm to 2.1 mm. The cut line 51 may be a through hole or a dead end hole. As shown in FIG. 3, in the first embodiment, the cut 51 is a through hole and is also provided at two ends (end y, end z) of the adhesive member 5.

  As shown in FIG. 4, in the engine cover of the first embodiment, a backing member 3 is disposed on the back side of the cover member 1. In the first embodiment, the adhesive member 5 is interposed between the cover member 1 and the backing member 3. The cover member 1 and the backing member 3 are bonded and integrated by an adhesive member 5. The rib portion 15 of the cover member 1 enters the concave portion 30 of the backing member 3. A part of the adhesive member 5 also enters the recess 30. A portion corresponding to the easily breakable portion 50 in the adhesive member 5 is broken to form a broken portion 59.

  Below, the manufacturing method of the engine cover of Example 1 is demonstrated.

(Preparation process)
In the preparation step, the adhesive member 5 was attached to the adhesive surface 31 of the backing member 3, that is, the surface facing the back surface of the cover member 1 in the backing member 3. At this time, the adhesive member 5 and the backing member 3 were aligned so that the easily breakable portion 50 of the adhesive member 5 was disposed at a position corresponding to the concave portion 30 of the backing member 3.

(Breaking adhesion process)
After the above preparation process, the cover member 1 is brought close to the backing member 3 to which the adhesive member 5 is attached, and the cover member 1 is attached to the back member 15 while the rib portion 15 of the cover member 1 is applied to the easily breakable portion 50 of the adhesive member 5. Pressed against member 3. Then, the easily breakable portion 50 was broken by being pressed by the rib portion 15, and the rib portion 15 penetrated the adhesive member 5 and entered the recess 30. At this time, the adhesive member 5 was adhered not only to the adhesive surface 31 of the backing member 3 but also to the back surface 11 of the cover portion 10, and the backing member 3 and the cover member 1 were adhered by the adhesive member 5.

  The backing member 3 was in close contact with the cover member 1 without being interfered with the adhesive member 5 because the easily breakable portion 50 pressed by the rib portion 15 was broken. That is, according to the engine cover manufacturing method of the first embodiment, the backing member 3 can be placed along the cover member 1 while avoiding interference between the adhesive member 5 and the rib portion 15. For this reason, even in the vicinity of the base portion 16 of the rib portion 15, the backing member 3 is close to the cover member 1, and the bonding area between the backing member 3 and the cover member 1 can be widened. Adhesiveness with 1 improves.

  As shown in FIG. 5, in the conventional engine cover, the adhesive member 105 does not break even at the rib portion 115. Therefore, the adhesive member 105 hinders the rib portion 115 from entering the recess 130 in the vicinity of the entrance of the recess 130. Therefore, the backing member 103 and the cover member 101 do not adhere sufficiently. In other words, the adhesive member 105 spans the top portion 117 of the rib portion 115, and defines a space 109 between the backing member 103 and the cover member 101 in the vicinity of the rib portion 115. This space 109 is particularly large on the base 116 side of the rib portion 115. As described above, since the adhesive member 105 is not broken, the backing member 103 cannot enter the space 109. Therefore, the backing member 103 does not sufficiently follow the cover member 101, and is in a state of floating with respect to the cover member 101, particularly in the vicinity of the rib portion 115. Therefore, the backing member 103 and the cover member 101 are closely bonded by the adhesive member 5 at a position away from the base portion 116 of the rib portion 115, but are separated and not bonded in the vicinity of the base portion 16. For this reason, according to such a conventional method for manufacturing an engine cover, it is difficult to improve the adhesion between the backing member 103 and the cover member 101.

  On the other hand, according to the engine cover manufacturing method of Example 1, the easy-to-break part 50 is provided in the adhesive member 5 as described above, and the adhesive member 5 is broken, so that the back cover is attached as shown in FIG. The bonding area between the member 3 and the cover member 1 can be widened, and the adhesion between the backing member 3 and the cover member 1 can be improved. Further, since the engine cover according to the first embodiment has the break portion 59 formed by breaking the easily breakable portion 50, a trace of the cut 51 remains in the adhesive member 5.

(Example 2)
The engine cover and the manufacturing method of the second embodiment are the same as the manufacturing method of the engine cover of the first embodiment except for the shape of the easily breakable portion of the adhesive member. FIG. 6 shows an enlarged perspective view of the main part schematically showing the engine cover of Example 2 and the adhesive member in the manufacturing method thereof. In addition, the adhesive member shown in FIG. 6 is a thing before a fracture | rupture similarly to the adhesive member shown in FIG.

  Also in the engine cover and the manufacturing method thereof according to the second embodiment, the adhesive member 5 is provided with the easily breakable portion 50. The easily breakable portion 50 includes a slit 52 that extends linearly. The slit 52 is a long cut 51. Therefore, also in Example 2, the easily breakable portion 50 has a lower strength than the general portion 55 and is easily broken. The slit 52 is a through hole and is not provided at the two end portions (end portion y, end portion z) of the adhesive member 5. For this reason, although the adhesive member 5 includes the slit 52, that is, a long opening, in the easily breakable portion 50, the adhesive member 5 is excellent in handleability.

  When the slit 52 extends to the end y or z of the adhesive member 5, the outer shape of the adhesive member 5 is greatly deformed by opening and closing the slit 52 at the end y or z of the adhesive member 5. easy. For this reason, in this case, the handleability of the adhesive member 5 may deteriorate. When the slit 52 extends to the end y or z of the adhesive member 5, it is preferable to shorten the opening length of the slit 52 as in the adhesive member 5 described in the first embodiment. Specifically, when the slit 52 extends to the end y or z of the adhesive member 5, the opening length of the extending slit 52 is preferably 50 mm or less, and is 20 mm or less. Is more preferable.

  According to the method for manufacturing the engine cover of the second embodiment, the easily breakable portion 50 is broken by the rib portion 15 when the backing member 3 and the cover member 1 are bonded, similarly to the method for manufacturing the engine cover of the first embodiment. . For this reason, the adhesiveness between the backing member 3 and the cover member 1 can also be improved by the engine cover manufacturing method of the second embodiment. The engine cover of the second embodiment also has a break portion 59 formed by breaking the easily breakable portion 50, and a trace of the cut 51, that is, the break portion 59 remains on the adhesive member 5.

  In the engine cover and the manufacturing method thereof according to the first and second embodiments, the easily breakable portion 50 includes the cut 51 or the slit 52. The cut line 51 and the slit 52 may be provided by processing the adhesive member 5, or may be formed simultaneously with the molding of the adhesive member 5. Further, in the engine cover and the manufacturing method thereof according to the present invention, the easily breakable portion 50 is not limited to the cut 51 or the slit 52. For example, the easily breakable portion 50 may be made of a material different from the general portion 55 (for example, a material having a lower strength than the general portion 55). Alternatively, the general portion 55 and the easily breakable portion 50 may be made of the same material, and the easily breakable portion 50 may have a lower density than the general portion 55. Furthermore, the thickness of the easily breakable portion 50 may be made thinner than the thickness of the general portion 55. Note that the easily breakable portion 50 only needs to be easier to break than the general portion 55, and is not limited to this, and various materials, shapes, and the like can be adopted.

(Example 3)
The engine cover and the manufacturing method thereof according to the third embodiment are the same as the engine cover and the manufacturing method thereof according to the first embodiment except that the adhesive member does not have an easily breakable portion and the rib portion has a tapered columnar shape. FIG. 7 shows an enlarged perspective view of a main part schematically showing the engine cover of the third embodiment and the rib part in the manufacturing method thereof.

  In the engine cover and the manufacturing method thereof according to the third embodiment, the adhesive member 5 does not have the easily breakable portion 50 and is configured only by the general portion 55. Instead, the rib portion 15 has a tapered column shape (FIG. 7).

  Specifically, the cover member 1 has a plurality of rib portions 15 that are linearly arranged, and each rib portion 15 has a tapered substantially cylindrical shape. Since the tip of each rib portion 15 is thin, the rib member 15 can make a hole in the adhesive member 5. Therefore, in the engine cover and the manufacturing method thereof according to the third embodiment, the adhesive member 5 without the easily breakable portion 50 can be broken. The adhesion between the member 3 and the cover member 1 can be improved.

Example 4
The engine cover and its manufacturing method of the fourth embodiment are the same as the engine cover and its manufacturing method of the third embodiment except that ribs other than the rib portions are provided. The principal part expanded sectional view which represents typically the engine cover of Example 4 and the rib part in the manufacturing method is shown in FIG.

  The adhesive member 5 used in the engine cover and the manufacturing method thereof according to the fourth embodiment is composed of only the general portion 55 as in the engine cover and the manufacturing method according to the third embodiment. The rib portion 15 is the same as the rib portion 15 in the engine cover and the manufacturing method thereof according to the third embodiment. As other ribs, there is a sub-rib portion 25 having a columnar shape having a substantially constant diameter and a projection height lower than the rib portion 15. A plurality of rib portions 15 and sub rib portions 25 are provided.

  As shown in FIG. 8, in the engine cover and the manufacturing method thereof according to the fourth embodiment, the adhesive member 5 without the easily breakable portion 50 is broken by the rib portion 15. For this reason, the rib portion 15 breaks the adhesive member 5, and the backing member 3 comes close to the cover member 1 even in the vicinity of the base portion 16 of the rib portion 15.

  On the other hand, the secondary rib portion 25 does not break the adhesive member 5. Therefore, the adhesive member 5 is hung on the top portion 26 of the sub-rib portion 25. However, since the protrusion height of the sub rib portion 25 is low, the space 29 defined by the adhesive member 5 in the vicinity of the base portion 27 of the sub rib portion 25 is relatively small. Therefore, although the backing member 3 cannot enter the space 29 defined by the adhesive member 5, the backing member 3 is sufficiently close to the cover member 1 even in the vicinity of the secondary rib portion 25. Adhesiveness between the backing member 3 and the cover member 1 is sufficiently ensured. Thus, in the engine cover and the manufacturing method thereof according to the present invention, all the ribs provided on the cover member 1 do not have to break the adhesive member 5. In addition, it is preferable that the protrusion height of the sub rib part 25 is 60% or less of the protrusion height of the rib part 15, It is more preferable that it is 40% or less, It is further more preferable that it is 30% or less. Even when the sub-rib portion 25 is provided on the cover member 1, the backing member 3 may or may not be provided with a sub-recess 35 corresponding to the sub-rib portion 25. Thus, it is preferable to provide the sub-recess 35.

  (Others) The present invention is not limited to the embodiment described above and shown in the drawings, and can be implemented with appropriate modifications within a range not departing from the gist. Moreover, each component shown in the embodiment can be arbitrarily extracted and combined.

1: Cover member 3: Backing member 5: Adhesive member 10: Cover portion 11: Back surface of cover portion 15: Rib portion 50: Easy break portion 51: Cut 55: General portion 59: Break portion

Claims (5)

A cover member having a cover portion that covers at least a part of an engine member of the vehicle, and a rib portion that protrudes from the back surface of the cover portion;
A backing member disposed on the back side of the cover member;
An adhesive member that is interposed between the cover member and the backing member, and that adheres to the cover member and the backing member;
The engine cover, wherein the adhesive member has a broken portion broken by the rib portion. The adhesive member is
In a state before bonding to the cover member, it has a general part, and an easily breakable part having a lower strength than the general part,
The engine cover according to claim 1, wherein the breakable portion is formed by breaking the easily breakable portion.   The engine cover according to claim 1, wherein the easily breakable portion includes a cut.   The engine cover according to any one of claims 1 to 3, wherein the rib portion has a tapered shape. A method for manufacturing the engine cover according to any one of claims 1 to 4,
A preparation step of attaching the adhesive member to one of the cover member and the backing member;
After the preparation step, the cover member and the backing member are brought close to each other, and the adhesive member is adhered to the cover member and the backing member, while the fracture bonding step of breaking the adhesive member at the rib portion, An engine cover manufacturing method comprising:

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