JP2006069505A - Heat insulation sheet and cover member for vehicle using the sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the heat insulating performance of a heat insulation sheet and preclude exfoliation from a member to be insulated or a poor workmanship of affixation. <P>SOLUTION: An outer sheet 66 consisting of a thin film made of aluminum series alloy is overlapped on one surface of an inner sheet 65 consisting of a heat-resistant material having gaseous nature, in which the outside contour of the outer sheet 66 is made ranging out of the outside contour of the inner sheet 65 with a certain width is reserved so as to form an extension margin 67 continuing over the whole peripheral circumference of the inner sheet 65, and sticking means 69 and 70 are provided on the extension margin 67 and the other surface of the inner sheet 65 so that the sheets 65 and 66 can be affixed to the member to be heat insulated 29. The boundary between the part where the sheets 66 and 65 are overlapping and the extension margin 67 is furnished with a missing part 72 for exposing the outside edge of the inner sheet 65 to the outside air. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat insulating sheet for shielding heat from a heat source such as an engine or an exhaust device in a vehicle such as a motorcycle or a saddle-ride type four-wheeled vehicle (buggy vehicle, ATV, etc.), and a vehicle using the same. The present invention relates to a cover member for use.

  In small vehicles such as motorcycles, resin cover members are frequently used, and a heat insulating sheet is attached to the surface facing the heat source for improving the heat resistance of the resin cover members arranged in the vicinity of the engine and the exhaust device. There are many cases.

  There exists what is described in patent document 1 as an example of sticking the heat insulation sheet | seat of the resin-made cover members in a motorcycle. Here, the heat insulation sheet is stuck inside the cover member provided in the upper part of an engine.

Generally, a heat insulating sheet is obtained by laminating and bonding an inner sheet made of a heat-resistant material such as glass fiber or foaming resin (silicon or the like) to an aluminum sheet, and the inner sheet portion is bonded to the cover member side.
Japanese Patent Laid-Open No. 11-192988

  However, since the inner sheet made of a heat-resistant material is weak and brittle, for example, when a heat insulating sheet is attached to the inside of a fender of a motorcycle or a saddle-type four-wheel vehicle, muddy water splashes from a wheel that rotates at high speed. There is a problem that the heat insulating sheet is easily peeled off from the fender due to a collision with pebbles or the like and water pressure during high-pressure car washing. In particular, a thick heat insulating sheet is easily peeled off when water pressure is applied to the end face. On the other hand, a thin heat insulating sheet is difficult to peel off, but its heat insulating performance is low.

  The present invention has been made to solve the above-described problems, and provides a heat insulating sheet that has high heat insulating performance and is unlikely to cause peeling or sticking failure from a member to be heat-insulated, and a vehicle cover member using the heat insulating sheet. With the goal.

  In order to achieve the above object, the heat insulating sheet according to the present invention has an outer sheet made of an aluminum alloy thin film superimposed on one surface of an inner sheet made of a heat-resistant material including a temperament, and the outer contour of the outer sheet is formed on the inner sheet. An extension allowance extending over the entire outer periphery of the inner sheet is formed by protruding from the outer contour with a predetermined width, and an adhesive means is provided between the extension allowance and the other surface of the inner sheet, The outer sheet can be attached to the heat insulating member.

  Moreover, the heat insulation sheet which concerns on this invention provided the lack part which makes the external edge of an inner sheet | seat face outside air in the boundary part of the part and the extension allowance of the outer sheet | seat of an outer sheet | seat.

  Further, in the heat insulating sheet according to the present invention, the notched portion is formed by dispersing an opening hole having an annular edge, and the position of the opening hole is a portion having a small curvature or a straight line in the outer edge of the inner sheet. Provided in the part.

  Further, in the vehicle cover member according to the present invention, an outer sheet made of a thin film made of an aluminum alloy is superposed on one surface of an inner sheet made of a heat-resistant material including a temperament, and the outer contour of the outer sheet is changed from the outer contour of the inner sheet. A heat insulating sheet is formed that has a predetermined width and protrudes over the entire outer periphery of the inner sheet to form an extending margin, and is provided with adhesive means on the extending margin and the other surface of the inner sheet. It is characterized by being attached to a surface facing an internal heat source and having an external opening.

  In the vehicle cover member according to the present invention, a notch portion that allows the outer edge of the inner seat to face the outside air is provided at the boundary between the portion of the outer seat where the inner seat is overlapped and the extension allowance.

  Further, in the vehicle cover member according to the present invention, the notched portion is formed by dispersing an opening hole having an annular edge, and the position of the opening hole is a portion of the outer edge of the inner seat having a small curvature. And in the straight part.

  Furthermore, in the vehicle cover member according to the present invention, the vehicle cover member is a rear fender that covers a rear wheel.

  In the vehicle cover member according to the present invention, the heat insulating sheet and another heat insulating member are adjacent to each other and adhered to the vehicle cover member, and an extension margin of the heat insulating sheet is provided on an outer edge portion of the other heat insulating member. We stuck and stuck.

  According to the heat insulating sheet according to the present invention, since the extension margin of the outer periphery of the outer sheet protrudes from the outer contour of the inner sheet and is attached to the heat insulating member, the end surface of the inner sheet is exposed to the outside and receives water pressure or the like. It can prevent that a heat insulation sheet peels from a to-be-insulated member. Moreover, since the thickness of the heat resistant material which comprises an inner sheet | seat can be increased, heat insulation performance can be improved.

  Furthermore, since the outer edge of the inner sheet faces the outside air from the notched part provided in the outer sheet, the air contained in the inner sheet is easily degassed from the missing part when the heat insulating sheet is attached to the member to be insulated, The sticking failure can be prevented, and moisture that has entered the inside of the heat insulating sheet can be discharged from the lacking portion. Also in this respect, the heat insulating sheet can be prevented from peeling off.

  Since the notched portion is provided at the boundary between the outer sheet extension allowance and the inner sheet, the inner sheet can be deformed, and the heat insulating sheet can be easily attached to the curved surface and is not easily peeled off. .

  Moreover, according to the vehicle cover member using the heat insulating sheet according to the present invention, it is possible to improve the heat insulating performance of the cover member and to prevent the heat insulating sheet from being peeled off from the cover member or being stuck poorly. By applying it to a rear fender, which is one of the places where the use conditions are particularly severe, it is possible to impart a highly reliable heat insulation to the rear fender.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a left side perspective view of a straddle-type four-wheel vehicle showing an example of a vehicle to which the present invention is applied, and FIG. 2 is a plan view of the same.

  The straddle-type four-wheel vehicle 1 includes a body frame 2 made of, for example, a steel pipe. As shown in FIG. 2, the vehicle body frame 2 is mainly composed of a pair of left and right upper pipes 3 and a lower pipe 4, and a plurality of connecting pipes 5, 6, 7, 8, 9, are connected between these pipes 3, 4. 10, 11, 12... Are assembled in a substantially cage shape. The front ends of the left and right upper pipes 3 are bent downward and fixed to the front ends of the lower pipes 4.

  A front wheel 13 and a rear wheel 14 with a pair of left and right wide low-pressure tires are provided on the front, rear, left and right of the body frame 2 via a suspension mechanism (not shown), an intermediate position between the front and rear wheels 13 and 14 and an upper pipe. The engine unit 15 is suspended and mounted substantially at the center of the vehicle body frame 2 so as to be positioned below 3.

  A straddle-type seating seat 16 is installed above the engine unit 15 and the rear wheel 14 and above the upper pipe 3, and a fuel tank 17 is provided below the engine unit 15 and behind the engine unit 15. A heat exchanger (oil cooler, radiator, etc.) 18 of the engine unit 15 is installed in the vicinity of the frontmost part of the vehicle body frame 2.

  A steering bracket 20 is provided at the front upper portion of the body frame 2, a steering shaft 22 is pivotally supported on a steering bearing 21 fixed to the steering bracket 20, and a steering handle 23 is provided at the upper end of the steering shaft 22. The lower end of the shaft 22 is connected to a steering gear box for steering the front wheels 13. Then, the front wheel 13 is steered by turning the steering handle 23 left and right.

  A front cover 26 is provided at the front of the vehicle body so as to cover the upper front part of the vehicle body frame 2 and a front fender 27 that covers the left and right front wheels 13 is integrally or integrally formed. A rear cover 28 that covers the upper side is provided, and a rear fender 29 that covers the left and right rear wheels 14 is formed integrally or integrally. These members 26 to 29 are, for example, synthetic resin molded products.

  Near the left and right sides of the engine unit 15, a step 30 for the rider to put his / her foot is provided. This step 30 is integrally formed so that the lower ends of the front and rear fenders 27 and 29 are continuous, for example.

  For example, the engine unit 15 includes an engine body 33 and a belt continuously variable transmission 34 that are integrally formed. The entire engine unit 15 includes a vehicle body frame that includes two lower engine mounts 35 and one upper engine mount 36. 2 is suspended and mounted in a vibration-proof manner.

  The engine main body 33 is, for example, a water-cooled four-cycle single-cylinder engine, and includes a crankcase 38 and a cylinder assembly 39 that is disposed in front of the upper surface at a forward tilt angle of about 45 degrees. A battery 40 is disposed in a space between the cylinder assembly 39 and the fuel tank 17.

  An engine intake system is disposed above the cylinder assembly 39 and below the seating seat 16. The engine intake system includes a throttle body 42 connected to the intake port of the cylinder assembly 39, and an air cleaner 44 disposed above and in front of the seating seat 16 and connected to the upstream side of the throttle body 42 via an intake pipe 43. And is configured. The air cleaner 44 is disposed so as to protrude above the upper pipe 3 of the vehicle body frame 2, and is covered with a cleaner cover 45 made of the same material as the front cover 26 and the rear cover 28.

  On the other hand, the exhaust device 47 of the engine unit 15 is disposed on one side in the vehicle width direction (right side in the present embodiment) and below the upper pipe 3 of the body frame 2. The exhaust device 47 includes an exhaust pipe 48 and an exhaust muffler 49. The exhaust pipe 48 extends forward from the exhaust port 50 on the front surface of the cylinder assembly 39 and curves rightward and rearward, and the right side of the engine body 33 is placed on the right side of the vehicle body. An exhaust muffler 49 is connected to the downstream end of the frame 2 extending substantially horizontally rearward along the lower part of the upper pipe 3. For example, the exhaust muffler 49 is disposed above the rear wheel 14 and below the rear fender 29 in a side view.

  The output of the engine main body 33 is steplessly changed by the transmission 34 and then output to the front wheel drive propeller shaft 52 and the rear wheel drive propeller shaft 53. The front wheel differential 54, the rear wheel differential 55, and The signals are transmitted from the differentials 54 and 55 to the front and rear wheels 13 and 14 through a pair of left and right axle shafts 56 and 57 extending in the vehicle width direction.

  A heat insulating sheet according to the present invention is attached to the rear fender 29 of the saddle-ride type four-wheel vehicle 1, and the rear fender 29 itself corresponds to the vehicle cover member according to the present invention. As shown in FIGS. 1 and 2, an exhaust pipe 48 of the exhaust device 47 serving as a heat source is disposed immediately inside the right rear fender 29, so that the rear fender 29 facing the heat source is protected from heat damage. Insulation sheets 61, 62, and 63 are attached to the inner surface of the front portion of the rear fender 29 for protection.

  FIG. 3 is a perspective view of the vicinity of the right front portion of the rear fender 29 as viewed from below. As shown here, three heat insulating sheets 61, 62, 63 are attached to the inner surface of the right front portion of the rear fender 29. Among these, the front heat insulating sheet 61 is a conventional general sheet-shaped heat insulating member, and the two heat insulating sheets 62 and 63 adjacent to the rear side of the heat insulating sheet 61 are the heat insulating sheets according to the present invention. is there.

  4 is a plan view of the heat insulating sheet 62, and FIG. 5 is a vertical cross-sectional view of the heat insulating sheet 62 along the line V-V in FIG. The heat insulating sheets 62 and 63 have the same structure except for the shapes.

  The heat insulating sheet 62 (63) is obtained by superposing an outer sheet 66 on one surface of the inner sheet 65. The inner sheet 65 is made of a heat-resistant material including a temperament such as foaming resin (for example, silicon), thick glass fiber, and heat-resistant nonwoven fabric, and the thickness thereof is, for example, about 3 mm to 5 mm. On the other hand, the outer sheet 66 is a thin film made of an aluminum alloy, and is adhered to one surface of the inner sheet 65. The outer sheet 66 is not limited to a simple aluminum-based thin film, and may be a metal thin film reinforced with, for example, glass fiber or metal wire.

  The outer contour of the outer sheet 66 protrudes from the outer contour of the inner sheet 65 with a predetermined width, and an extension allowance 67 that is continuous over the entire outer periphery of the inner sheet 65 is formed. The extension allowance 67 has a width of about 10 mm to 20 mm, but it does not necessarily have to be formed with a constant width over the entire circumference.

  Then, double-sided tapes 69 and 70 are adhered to the extension allowance 67 and the other surface of the inner sheet 65 as adhesive means. An adhesive may be applied instead of the double-sided tapes 69 and 70. As a result, the inner sheet 65 and the outer sheet 66 can be attached to the rear fender 29 that is a heat-insulated member.

  A plurality of notches are provided at the boundary between the portion of the outer sheet 66 where the inner sheet 65 is overlapped and the extension allowance 67. This notched portion is formed, for example, by dispersing opening holes (here, circular holes) 72 having an annular edge. Each opening hole 72 is provided so as to be located in a portion having a small curvature or a straight portion in the outer edge of the inner sheet 65.

  As shown in FIG. 6, when the heat insulating sheet 62 (63) is attached to the rear fender 29 by the adhesive force of the double-sided tape 69, 70, the thick inner sheet 65 is wrapped in the thin film outer sheet 66. It becomes. Then, the outer edge of the inner sheet 65 faces the outside air from the opening hole 72 as a lacking portion provided in the outer sheet 66.

  According to the heat insulating sheets 62 and 63 configured as described above, the extension allowance 67 on the outer periphery of the outer sheet 66 protrudes from the outer contour of the inner sheet 65 and is attached to the rear fender 29. Is not exposed to the outside, so that muddy water, pebbles and the like scattered from the rear wheel 14 rotating at high speed collide with the heat insulating sheets 62, 63, or even when water pressure during high-pressure car washing is applied to the heat insulating sheets 62, 63 The sheet 65 does not peel off. And since there is no fear of peeling of the inner sheet | seat 65 in this way, the thickness of the heat-resistant material which comprises the inner sheet | seat 65 can be increased, and heat-resistant performance can be improved greatly.

  Further, since the outer edge of the inner sheet 65 faces the outside air from the opening hole 72 as a notch portion provided in the outer sheet 66, it is included in the inner sheet 65 when the heat insulating sheets 62 and 63 are attached to the rear fender 29. Air can be easily degassed from the opening hole 72, thereby preventing the sticking of the heat insulating sheets 62 and 63 and peeling due to air expansion. And since the water | moisture content permeated into the inside of the heat insulation sheets 62 and 63 can be discharged | emitted from the opening hole 72, peeling and deterioration of the heat insulation sheets 62 and 63 can also be prevented also in this point.

  Since the opening 72 is provided at the boundary between the extension allowance 67 of the outer seat 66 and the inner seat 65, the inner seat 65 is allowed to be deformed, and the heat insulating sheets 62 and 63 are attached to the curved rear fender 29. Can be easily attached and is difficult to peel off.

  Such heat insulating sheets 62 and 63 face one of the heat sources (exhaust device 47) inside the vehicle body, and at the same time the opening to the outside (wheel arch) is close, so that it is one of the places where the use conditions are the most severe. By applying it to the rear fender 29, the rear fender 29 can be provided with highly reliable heat insulation. Further, for example, the distance between the rear fender 29 and the exhaust device 47 can be reduced, which can contribute to the compactness of the vehicle body.

  By the way, as shown in FIG. 3, the heat insulation sheet of the conventional structure is formed by overlapping and pasting the portion of the extension allowance 67 of the rear heat insulation sheets 62 and 63 on the outer edge of the front heat insulation sheet 61. The edge part of 61 can be protected by the extension allowance 67, and peeling from the rear fender 29 of the heat insulation sheet 61 can be prevented effectively.

  Note that a heat insulating sheet similar to the heat insulating sheets 62 and 63 may be attached not only to the rear fender 29 but also to other cover members. Furthermore, the present invention can be applied not only to the straddle-type four-wheel vehicle 1 but also to other vehicle types such as motorcycles and automobiles, ships, and the like.

1 is a left side perspective view of a straddle-type four-wheel vehicle showing an example of a vehicle to which the present invention is applied. 1 is a plan view of a straddle-type four-wheel vehicle showing an example of a vehicle to which the present invention is applied. The perspective view which looked at the front part vicinity of the right side of a rear fender from the downward direction. The top view of a heat insulation sheet. The longitudinal cross-sectional view of the heat insulation sheet which follows the VV line of FIG. The figure which shows one Embodiment of this invention with the longitudinal cross-section by which the heat insulation sheet was affixed on the rear fender.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Saddle-type four-wheel vehicle 14 Rear wheel 29 The rear fender 47 as a vehicle cover member which is a to-be-insulated member Exhaust device 61 which is a heat source inside a vehicle body Another heat-insulating member 62, 63 Heat-insulating sheet 65 Inner seat 66 Outer seat 67 Extension allowance 69, 70 Double-sided tape 72 as adhesive means Opening hole as missing part

Claims (8)

An outer sheet made of a thin film made of an aluminum alloy is superimposed on one surface of the inner sheet made of a heat-resistant material including a temperament, and the outer contour of the outer sheet protrudes with a predetermined width from the outer contour of the inner sheet. An extension allowance that extends continuously over the entire outer periphery is formed, and an adhesive means is provided on the extension allowance and the other surface of the inner sheet so that the inner sheet and the outer sheet can be attached to the heat insulating member. Insulation sheet. The heat insulating sheet according to claim 1, wherein a cutout portion is provided at a boundary portion between the portion of the outer sheet where the inner sheet is overlapped and the extension allowance so that the outer edge of the inner sheet faces outside air. The said removal part is formed by disperse | distributing the opening hole which has an annular edge, The position of this opening hole was provided in the part with a small curvature and the linear part among the external edges of an inner sheet | seat. Insulation sheet. An outer sheet made of a thin film made of an aluminum alloy is superimposed on one surface of the inner sheet made of a heat-resistant material including a temperament, and the outer contour of the outer sheet protrudes with a predetermined width from the outer contour of the inner sheet. A heat insulation sheet that forms an extension allowance that extends continuously over the entire outer periphery, and that is provided with adhesive means on the extension allowance and the other surface of the inner sheet faces the heat source inside the vehicle body and opens to the outside. A vehicular cover member using a heat insulating sheet, which is attached to a surface adjacent to each other. 5. A vehicle using a heat insulating sheet according to claim 4, wherein a cutout portion is provided at the boundary between the portion where the inner sheet is overlapped and the extension allowance of the outer sheet so that the outer edge of the inner sheet faces the outside air. Cover member. The said removal part is formed by disperse | distributing the opening hole which has an annular edge, The position of this opening hole was provided in the part with a small curvature among the external edges of an inner sheet | seat, or a linear part. A vehicle cover member using a heat insulating sheet. The vehicle cover member using the heat insulating sheet according to claim 4, wherein the vehicle cover member is a rear fender that covers a rear wheel. The said heat insulation sheet and another heat insulation member were mutually adjoined, and it affixed on the cover member for vehicles, and the extension margin of the heat insulation sheet was piled up on the outer edge part of another heat insulation member, and was affixed. A vehicle cover member using a heat insulating sheet.

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