Cover member

Abstract

To provide a cover member having a light-shielding property and capable of blocking vibration and noise.SOLUTION: A soft cover member 1 Includes: a central portion 1a; and an outer peripheral portion 1b located at an outer periphery of the central portion 1a. The cover member comprises: a pair of sheet-like upholstery materials 2a, 2b disposed to face each other; an intermediate layer 3 including at least one of a sound absorption layer 3b and a sound insulation layer 3a; and an outer periphery holding member 4 located at the outer peripheral portion 1b. The upholstery materials 2a, 2b and the outer periphery holding member 4 are mutually different members. The pair of upholstery materials 2a, 2b is held by the outer periphery holding member 4 in a state of being stacked one on top of the other at the outer peripheral portion 1b, and the upholstery materials face each other with a space therebetween at the central portion 1a. The intermediate layer 3 is disposed in the space between the pair of upholstery materials 2a, 2b at the central portion 1a.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a cover member. [Background technology]

[0002] Vehicles are provided with a cover member such as a tonneau cover that covers an opening of a luggage compartment as described in Patent Document 1, and an interior material as described in Patent Document 2. The tonneau cover described in Patent Document 1 has wires connected in a substantially rectangular shape, an edging member that wraps the wires along the wires, and a sheet that is attached to the edging member and covers the area surrounded by the edging member. The interior material described in Patent Document 2 has a breathable design layer, a breathable cushioning material layer, and a breathable adhesive layer provided between the design layer and the cushioning material layer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6193560 [Patent Document 2] Japanese Patent Application Publication No. 6360420 Summary of the Invention [Problem to be solved by the invention]

[0004] The tonneau cover described in Patent Document 1 has a light-blocking property so that the inside of the luggage compartment cannot be seen from the outside, but does not have a vibration-damping property. Therefore, if vibration or noise occurs in the luggage compartment, the vibration or noise cannot be blocked. Even if the interior material described in Patent Document 2 is applied to the cover member, each layer has breathability and cannot block vibration or noise. In particular, since there is a demand in recent years for lighter cover members, the vibration-damping property has become even poorer. SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a cover member that has light blocking properties and is also capable of blocking vibrations and noise. [Means for solving the problem]

[0005] The cover member of the present invention is a flexible cover member including a central portion and a peripheral portion located on the outer periphery of the central portion, and has a pair of sheet-like skin materials arranged to face each other, an intermediate layer including at least one of a sound absorbing layer and a sound insulating layer, and a peripheral retaining member located on the peripheral portion, wherein the skin materials and the peripheral retaining member are separate members, the pair of skin materials are sandwiched and held by the peripheral retaining member from both sides in the thickness direction in a state where they overlap each other in the peripheral portion, and face each other with a gap in between in the central portion, and the intermediate layer is disposed in the space between the pair of skin materials in the central portion. Effect of the Invention

[0006] According to the present invention, it is possible to provide a cover member that has light blocking properties and is also capable of blocking vibrations and noise. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a perspective view of a cover member according to an embodiment of the present invention. [Diagram 2] 2 is a cross-sectional view taken along line AA in FIG. 1. [Diagram 3] 3 is an enlarged cross-sectional view of a central portion of the cover member shown in FIGS. [Figure 4] 4 is a graph showing the soundproofing performance of the cover member of the present embodiment in comparison with the soundproofing performance of a conventional tonneau cover. [Diagram 5] 13 is a cross-sectional view of a main part of a cover member according to another embodiment of the present invention. FIG. [Figure 6] FIG. 11 is a perspective view of a cover member according to still another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a cover member 1 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of line AA in FIG. 1. FIG. 3 is an enlarged cross-sectional view of a central portion 1a of the cover member 1 shown in FIGS. 1 and 2. As shown in FIG. 1, the cover member 1 has a substantially rectangular outer shape including a central portion 1a and an outer peripheral portion 1b located on the outer periphery of the central portion 1a, as in the case of a conventional cover member. As shown in FIG. 2, the cover member 1 mainly includes a pair of light-shielding sheet-like skin materials 2a, 2b arranged to face each other, an intermediate layer 3, and an outer peripheral holding member 4 located on the outer peripheral portion. The outer peripheral holding member 4 can hold the sheet-like member by sandwiching it. The pair of skin materials 2a, 2b are held by the outer peripheral holding member 4 in a state where they overlap each other in the outer peripheral portion 1b. In the central portion 1a, the pair of skin materials 2a, 2b face each other with a gap therebetween. An intermediate layer 3 is arranged in the space between the pair of skin materials 2a, 2b in the central portion 1a. The intermediate layer 3 includes at least one of a sound absorbing layer and a sound insulating layer.

[0009] The pair of skins 2a, 2b may be made of different materials. For example, the upper skin 2a is made of the same material as the sheet of Patent Document 1, and is an elastic member such as a jersey fabric of nylon or polyester. The lower skin 2b is made of, for example, needle punch. The upper and lower sides here refer to the upper and lower sides when the cover member 1 is arranged to cover the opening of the luggage compartment of the vehicle. The upper side is located on the passenger compartment side of the vehicle, and the lower side faces the inside of the luggage compartment. The lower skin 2b is usually not visible, so it may be a lightweight needle punch. However, this is not limited to this example, and the lower skin 2b may also be an elastic member such as a jersey fabric of nylon or polyester. In the tonneau cover of Patent Document 1, only one sheet made of a jersey fabric or the like is attached to one side as seen from the wire. However, in the cover member 1 of this embodiment, an upper skin material 2a and a lower skin material 2b are provided when viewed from a wire 4a of an outer periphery holding member 4 described later. Each of the skin materials 2a, 2b extends from the central portion 1a to a part of the outer periphery portion 1b, but does not reach the outermost edge of the cover member 1.

[0010] The outer peripheral holding member 4 of this embodiment includes a wire 4a and a cloth member 4b that wraps at least a part of the wire 4a. As shown in FIG. 2, the wire 4a of this embodiment has a circular cross section, and the cloth member 4b contacts about half of the outline of the cross section of the wire 4a from the outer peripheral side of the wire 4a, then extends toward the central portion 1a on the upper and lower sides of the wire 4a, and overlaps the upper and lower skin materials 2a and 2b, respectively. However, the cross section of the wire 4a is not limited to a circle, and may be a rectangle, a trapezoid, or the like. The upper cloth member 4b is folded back toward the lower side at the portion where it overlaps the skin material 2a and contacts the upper skin material 2a. The lower cloth member 4b is folded back toward the upper side at the portion where it overlaps the skin material 2b and contacts the lower skin material 2b. The skin materials 2a and 2b extend toward the outer peripheral side until the position where it abuts against the wire 4a or just before that. Therefore, the wire 4a is located on the outer periphery of the skins 2a and 2b, and the cloth member 4b covering the wire 4a from the outer periphery overlaps the skins 2a and 2b on the central portion 1a side of the wire 4a. The cloth member 4b is folded back and doubled to sandwich the portion where the skins 2a and 2b directly overlap each other from above and below. The cloth member 4b is then sewn to the skins 2a and 2b, and the outer periphery holding member 4 is fixed to the skins 2a and 2b. The outer periphery side ends of the skins 2a and 2b are sandwiched and held by the outer periphery holding member 4 over substantially the entire circumference, and the space existing in the central portion 1a is sealed on the outer periphery side.

[0011] As shown in FIG. 3, the intermediate layer 3 is disposed in the space between the pair of skins 2a, 2b. The intermediate layer 3 of this embodiment has a two-layer structure in which, for example, a sound-insulating layer 3a made of polyethylene and a sound-absorbing layer 3b made of felt are laminated in this order from the lower skin 2b to the upper skin 2a. Therefore, in the central portion 1a, the lower skin 2b, the sound-insulating layer 3a, the sound-absorbing layer 3b, and the upper skin 2a are arranged in this order in the thickness direction of the cover member 1. The cover member 1 of this embodiment has a light-shielding property, and when used as a tonneau cover for covering the luggage compartment of a vehicle, for example, it is possible to prevent items and the like in the luggage compartment from being seen from the outside. Furthermore, since the intermediate layer 3 includes at least one of the sound-insulating layer 3a and the sound-absorbing layer 3b, the transmission of noise from the luggage compartment side to the passenger compartment is suppressed.

[0012] As described in Patent Document 1, conventional tonneau covers have light-shielding properties due to a sheet (skin material) made of a single piece of jersey fabric or the like, but are poor in sound insulation and sound absorption properties. Therefore, when any sound occurs in the luggage compartment or when sound generated under the vehicle body enters the luggage compartment, the sound is transmitted through the tonneau cover into the passenger compartment, causing noise to the passengers. In contrast, the cover member 1 of this embodiment has a pair of skin materials 2a, 2b and an intermediate layer 3 including at least one of a sound-insulating layer 3a and a sound-absorbing layer 3b, so that the cover member 1 exhibits light-shielding properties and blocks sounds generated in the luggage compartment or sounds that enter the luggage compartment from the lower part of the vehicle body, thereby preventing the sound from being transmitted into the passenger compartment. Therefore, noise to the passengers can be reduced. The graph in FIG. 4 shows the soundproofing performance of this embodiment in comparison with that of a conventional tonneau cover. This graph shows the soundproofing performance against sounds of various frequencies, and is expressed as a relative value with the soundproofing performance of a package tray, which is a general interior material for vehicles, set as a reference (0 dB). As is clear from this graph, the cover member 1 of this embodiment exhibits a much higher soundproofing performance than a conventional tonneau cover. In addition, the overall soundproofing performance is higher than that of a general package tray. The cover member 1 of this embodiment can exhibit high soundproofing performance against high-frequency sounds of about 1100 Hz or more, particularly 1600 Hz or more, which are particularly harsh to the ears of passengers, and is highly effective in practical use. Thus, according to the cover member 1 of this embodiment, by simply adding three relatively light and inexpensive layers (for example, the lower skin material 2b made of needle punch, the sound-insulating layer 3a made of polyethylene, and the sound-absorbing layer 3b made of felt) to a conventional cover member, high soundproofing performance based on the vibration-damping properties of the intermediate layer 3 can be realized without increasing the weight and manufacturing cost too much.

[0013] Examples of the relative thickness and basis weight of each layer of the cover member 1 of the present embodiment described above are described below. In the example shown in FIG. 3, the lower skin material 2b has a thickness of 1.5t and a basis weight of 150g / m 2 The sound-proof layer 3a has a thickness of 0.5t and a weight of 150g / m 2 The thickness of the sound absorbing layer 3b is 12t and the weight is 400g / m 2The thickness of the upper skin material 2a is 1t and the weight is 200g / m 2 ~300g / m 2 The thickness of each layer is expressed as a relative value when the thickness of the upper skin material 2a is taken as 1t. Compared to a configuration having only one layer of sheet made of, for example, jersey fabric, such as the tonneau cover of Patent Document 1, the configuration shown in FIG. 3 has three additional layers (lower skin material 2b, sound insulation layer 3a, and sound absorption layer 3b). These additional three layers may be bonded together, and for example, a configuration similar to that of the vehicle interior material of Patent Document 2 may be adopted to reduce manufacturing costs compared to a stitched configuration. However, it is also possible to have a configuration in which the additional three layers are not bonded together. In this embodiment, the total basis weight of the additional three layers is 700 g / m 2 In particular, the weight of the intermediate layer 3 is 100 g / m 2 ~600g / m 2 This is lightweight yet has a large effect of suppressing sound transmission. In addition, it is possible to adjust the soundproofing performance by changing the basis weight of this intermediate layer 3. For example, by adjusting the basis weight of the intermediate layer 3, it is possible to adjust the frequency band in which the soundproofing effect is particularly large, thereby obtaining a more appropriate soundproofing effect according to the application.

[0014] When the cover member of this embodiment is placed in, for example, the trunk of a vehicle, it is preferable that the sound absorbing layer 3b of the intermediate layer 3 is located above the sound insulating layer 3a. With this configuration, sound from the trunk is insulated so that it does not travel to the passenger compartment, while sound from the passenger compartment is prevented from being reflected by the cover member and transmitted to the passengers. In addition, since the soft sound absorbing layer 3b and the upper skin material 2a are located on the upper surface side of the cover member 1, the upper surface of the cover member 1 is flexible and stable when an object is placed on it.

[0015] As described above, it is preferable that the intermediate layer 3 has a sound insulating layer 3a and a sound absorbing layer 3b. However, although not shown, even if the intermediate layer 3 has only the sound absorbing layer 3b or only the sound insulating layer 3a, the above-mentioned effects of the present invention can be obtained, and this is also included in the present invention. Such a configuration is effective in terms of reducing costs. Also, a configuration in which multiple sound insulating layers 3a and / or sound absorbing layers 3b are provided may be used. It is preferable that the cover member of the present invention has a non-breathable configuration, since this has a greater effect of suppressing sound transmission.

[0016] 2, it is preferable that the maximum thickness L2 of the intermediate layer 3 is greater than the overall thickness L1 of the cover member 1 at the portion where the cloth member 4b of the outer periphery holding member 4 encases a portion of the wire 4a in the thickness direction of the cover member 1. With such a configuration, the vibration damping effect is greater, and the stability is good when an object is placed on the cover member 1. With a configuration without the intermediate layer 3 or a configuration with a thin intermediate layer 3, the central portion 1a is thin and easily bent, resulting in poor stability when an object is placed on it, but with a configuration with a thick intermediate layer 3 as described above, the object can be stably held.

[0017] As described above, when the fabric member 4b of the outer periphery holding member 4 is sewn to the skins 2a, 2b, it is preferable that the stitched portion S of the fabric member 4b is located closer to the central portion 1a than the center position C of the outer periphery portion 1b in the direction B from the central portion 1a toward the outer periphery portion 1b, and the edge portion E of the skins 2a, 2b is located outside the center position C, as shown in Fig. 2. With this configuration, even if sound generated or entering the central portion 1a leaks from the ends of the skins 2a, 2b, it is blocked by the fabric member 4b of the outer periphery holding member 4 and is prevented from leaking outside the cover member 1, which is highly reliable. Furthermore, with this configuration, the outer periphery holding member 4 and the skins 2a, 2b are easily and firmly joined.

[0018] In another embodiment of the cover member of the present invention shown in Fig. 5, in the central portion 1a, the intermediate layer 3 is not in contact with one of the skins, for example the upper skin 2a, and a gap 5 exists between the intermediate layer 3 and the upper skin 2a. With this configuration, the sound absorbing effect of the gap 5 further improves the effect of suppressing sound transmission. If it is possible to stably hold the intermediate layer 3, it is also possible to configure the intermediate layer 3 not to be in contact with the lower skin 2b, and to have a gap 5 between the intermediate layer 3 and the lower skin 2b. However, a configuration in which the intermediate layer 3 is not in contact with both skins 2a, 2b is not preferable because there is a high possibility that the intermediate layer 3 itself will vibrate.

[0019] In yet another embodiment of the cover member of the present invention shown in Fig. 6, a thin portion 6 where the intermediate layer 3 is thin is provided in part of the central portion 1a. With this configuration, even if the central portion 1a is thick due to the intermediate layer 3 as described above, it can be easily folded at the thin portion 6. Therefore, while the above-mentioned effect of having the intermediate layer 3 and making the central portion 1a thick can be obtained, the additional effect of being easy to fold and store, similar to the tonneau cover of Patent Document 1, can be obtained. Note that the thin portion 6 can also be formed by providing a portion of the central portion 1a where the intermediate layer 3 is not present. [Explanation of symbols]

[0020] 1 Cover member 1a central part 1b Outer area 2a Upper skin 2b Lower skin 3. Middle Tier 3a Sound insulation layer 3b Sound absorption layer 4 Outer circumference retaining member 4a wire 4b Cloth parts 5. Gap 6 Thin-walled section

Claims

1. A flexible cover member including a central portion and a peripheral portion located on an outer periphery of the central portion, The airbag has a pair of sheet-like skin materials arranged to face each other, an intermediate layer including at least one of a sound absorbing layer and a sound insulating layer, and an outer periphery holding member located at the outer periphery, The skin material and the outer periphery holding member are separate members, the pair of skin materials are sandwiched and held by the outer periphery holding member from both sides in a thickness direction in a state where the outer periphery portions overlap each other, and the pair of skin materials face each other with a gap in between in the central portion, The cover member, wherein the intermediate layer is disposed in a space between the pair of skin materials in the central portion.

2. 2. The cover member according to claim 1, wherein a gap exists between the intermediate layer and one of the skins in the central portion.

3. The cover member is disposed in a luggage compartment of a vehicle, 3. The cover member according to claim 1, wherein the intermediate layer includes the sound-insulating layer and a sound-absorbing layer located above the sound-insulating layer.

4. the outer periphery holding member includes a wire and a cloth member that wraps at least a portion of the wire and has a portion overlapping the skin material, A cover member as described in any one of claims 1 to 3, characterized in that the maximum thickness of the intermediate layer is greater than the overall thickness of the cover member in the thickness direction of the cover member at a portion where the cloth member envelops at least a portion of the wire.

5. 5. The cover member according to claim 4, wherein the fabric member is fixed to the skin material by being sewn thereto, the sewn portion of the fabric member is located closer to the central portion than a center position of the outer peripheral portion in a direction from the central portion toward the outer peripheral portion, and an edge portion of the skin material is located outside the center position.

6. A cover member according to any one of claims 1 to 5, which is foldable.

7. 7. The cover member according to claim 6, wherein the intermediate layer is absent or the intermediate layer is provided in a thin portion in a part of the central portion.

Images