Water-proof fabric-joined article for enclosing valuables

Abstract

To provide a water-proof fabric-joined article capable of preventing water from entering by enclosing valuables, that prevents local tensile force from being applied to a joining portion of a water-proof sheet, a fastener portion, and so forth.SOLUTION: According to a water-proof fabric-joined article for enclosing valuables each whose whole lower surface is not a placement surface, that is manufactured by joining a water-proof sheet, there is provided the water-proof fabric-joined article obtained by being closely attached to a lower surface that is not the placement surface of the valuables by hydraulic pressure during increasing of an amount of water, when the water-proof sheet placed below the valuables is made to be allowed dimensionally.SELECTED DRAWING: Figure 1C

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE The present invention relates to a waterproof fabric patchwork for enclosing property. [Background technology]

[0002] Due to abnormal weather in recent years, sudden and concentrated heavy rain disasters caused by linear rain bands and the like have occurred frequently all over Japan. Flooding damage caused by heavy rain can cause fatal damage to property such as commercial refrigerators, generators, electrical appliances, machine tools, agricultural machinery, and private cars, and therefore needs to be effectively prevented. In particular, there is a high possibility that automobiles will be treated as total losses if they are flooded above the muffler (Non-Patent Document 1), so there is a high need to protect them from flooding.

[0003] Proposals have been made for waterproof packs with fasteners that have a rectangular bottom section in which a vehicle can be parked and a bag-shaped cover section with a rim that fits the outer periphery of the bottom section (Patent Document 1, Patent Document 2, Patent Document 3). Patent Document 2 proposes providing an air vent valve in the cover section, so that the air inside is automatically released as the surrounding water level rises due to flooding, allowing the bottom section and cover section to be smoothly attached to the vehicle, but since the water pressure acting on the waterproof sheet placed between the left and right tires in particular cannot be solved by the air vent valve, it can be said that there is essentially no mention of any measures against water pressure.

[0004] In both documents, the sheet placed between the left and right tires of a car is subjected to water pressure as the water level rises, and if there are seams in the sheet, localized tensile forces will act to open the seams, allowing water to seep in. There is also the problem that water can easily seep in through parts of the waterproof sheet, such as zippers, which have lower water pressure resistance than the sheet itself. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2023-89060 A [Patent Document 2] Patent Publication No. 2022-45807 [Patent Document 3] Utility model registration No. 3179545 [Non-patent literature]

[0006] [Non-Patent Document 1] Yoshifumi Koizumi, "If your car is submerged in water, is it more cost-effective to repair it or dispose of it? Criteria for deciding whether to continue driving it," Web Motor Magazine, January 18, 2022 (URL: https: / / web.motormagazine.co.jp / _ct / 17511561) Summary of the Invention [Problem to be solved by the invention]

[0007] In view of the above-mentioned current situation, the present invention aims to provide a waterproof fabric patchwork product that is less susceptible to localized tensile forces at the joints and zipper parts of the waterproof sheet, and that can enclose property and prevent water from entering. [Means for solving the problem]

[0008] One aspect of the present invention made to achieve the above object is a waterproof fabric spliced ​​product manufactured by splicing waterproof sheets to enclose property whose entire underside is not a placement surface, and the waterproof fabric spliced ​​product is designed so that the waterproof sheet laid under the property has a dimensional allowance so that the waterproof sheet adheres to the underside of the property that is not a placement surface according to its shape due to the water pressure when the water level rises. With this configuration, the waterproof sheet adheres to the underside that is not a placement surface of the property due to the water pressure when the water level rises, and the water pressure acting in a direction pushing up the waterproof sheet from below and the force acting from the underside of the property in a direction pushing back the waterproof sheet are balanced, so that water infiltration through the waterproof sheet spliced ​​part can be prevented for as long as possible.

[0009] It is preferable that the above-mentioned waterproof fabric joint product has a dimensional margin of at least twice the minimum ground clearance of the bottom surface of the property and not more than twice the maximum ground clearance of the bottom surface of the property. If the dimensional margin is within the above range, even if the bottom surface of the property has some irregularities, the waterproof sheet will easily adhere to the irregularities due to water pressure.

[0010] The waterproof fabric joint product has a thickness of 0.05mm to 0.15mm, a weight of 50g / m2, and a waterproof sheet that is water repellent on the front side that is directly exposed to water and hydrophilic on the back side that faces property. 2 ~100g / m 2 According to this structure, the waterproof sheet can be easily attached to the underside of the property that is not the surface on which the property is placed, due to the water pressure when the water level rises, and since the reverse side is hydrophilic, even if water seeps to the reverse side, a water film is formed between the reverse side of the property and the waterproof sheet, making it easy to adhere to the property.

[0011] The waterproof fabric joint product is preferably such that the property whose entire underside is not a loading surface is a transport machine or an agricultural machine having symmetrical wheels, and the actual dimension of the waterproof sheet laid between the left and right wheels or the front and rear wheels when the transport machine or the agricultural machine is loaded is 0.7 to 1.8 times larger than the distance between the left and right wheels or the front and rear wheels than the diameter of the left and right wheels or the front and rear wheels. If the margin of the actual dimension of the waterproof sheet is within the above range, even if the underside of the chassis has some unevenness, the waterproof sheet laid between the left and right tires will easily adhere to the unevenness by water pressure.

[0012] The waterproof fabric patch is preferably provided with an inner lining marking fabric that allows the wheel positions to be visually identified by a difference in color or pattern from the outer cover, etc. This is because the presence of the inner lining marking fabric makes it easier to check whether the inner bottom surface is fully expanded when laying the patch or when driving over it with transport or agricultural machinery.

[0013] It is preferable that the waterproof fabric joint product is a bag consisting of a vehicle body storage section and a lid section that covers the opening of the vehicle body storage section, and that a fastener member for closing the opening of the bag is provided on the periphery of the lid section and the upper periphery of the vehicle body storage section. Since the fastener member is provided to join the fabrics together, it is a part that tends to lose waterproofness due to water pressure, so by providing a fastener on the upper periphery of the vehicle body storage section, it is easy to avoid water intrusion when the water level rises without using a special waterproof fastener.

[0014] It is preferable that the waterproof fabric patch has a reinforcing patch applied to the lower corners, because the lower corners are often in contact with sharp parts of property and are easily damaged or torn by localized pressure. Effect of the Invention

[0015] According to the present invention, a waterproof sheet with ample dimensions can be made to adhere to the shape of the property by water pressure, which reduces the amount of localized stress on the seams and zipper parts of the waterproof sheet, thereby making it possible to obtain a waterproof fabric seamed product that can prevent water penetration for as long as possible. [Brief description of the drawings]

[0016] [Figure 1A] 1A is a schematic perspective view of one embodiment of a waterproof fabric seam according to the present invention in a water-free state; FIG. [Figure 1B] (b) Cross-sectional view taken along line AA, and (c) cross-sectional view taken along line BB of Figure 1A. [Figure 1C] 1 is a schematic diagram showing the deformation state of the waterproof sheet when a light vehicle is placed in the vehicle body storage section of the waterproof fabric joint product of the present invention and water is accumulated around it. FIG. [Diagram 2] 5A to 5C are cross-sectional views showing a manufacturing process of the joint portion of the embodiment. [Figure 3A] A photo showing the installation of the waterproof bag before welcoming the car into the pool testing area. [Figure 3B] A photo showing the car just before it was welcomed into the pool testing area. [Figure 3C] A photo showing the car on its way to the pool testing site. [Figure 3D] A photo showing the car being welcomed into the pool testing area. [Figure 3E] A photo showing the top cover in the process of covering the car. [Figure 3F] A photo showing the pool test area set up with the car completely covered and the top edge zipped up. [Figure 4] A photo showing the water depth just before floating. [Diagram 5] Underwater photograph showing the wheels touching the ground at the water depth in Figure 4. [Figure 6] Underwater photo showing the waterproof sheet attached to the bottom chassis. [Figure 7] An underwater photograph showing the state in which water has risen beyond the depth shown in Figure 4 and one of the wheels is floating. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The meanings of the terms used in this specification will be explained below. In this specification, the term "waterproof fabric splice" refers to a splice that requires a certain degree of water pressure resistance, especially in the part where waterproof fabrics are spliced ​​together. If the waterproof fabric splice is a product manufactured entirely by welding, it is a waterproof welded product, and if it includes a sewn part, it is a waterproof sewn product, but it conceptually includes any of waterproof welded products, waterproof sewn products, and products manufactured by combining sewing and welding. The waterproof fabric splice may be a waterproof bag with all openings closed, or, if it is an environment where rain does not fall from above, it may be a water-proof wall with a bottom cover that has a bottom and a peripheral wall and an open top. The required water pressure resistance varies depending on the expected level of flood damage and the purpose, but it is sufficient if the water pressure resistance at the splice part is 50% or more (preferably 70% or more, more preferably 75% or more, and even more preferably 80% or more) of the water pressure resistance of the waterproof fabric itself. Therefore, when using a waterproof fabric with a water pressure resistance of 1300 mm, it is sufficient to ensure a water pressure resistance of 650 mm at the joint. In this specification, the water pressure resistance is a value obtained by the water resistance test (hydrostatic pressure method) Method A specified in JIS L 1092.

[0018] In this specification, "goods whose entire underside is not a placement surface" means goods whose underside is at least partially higher than the lowest horizontal surface of the goods (usually including the grounding point, grounding line or grounding surface) when the goods are placed on a flat ground. Examples of such goods include household goods with feet, casters or rubber feet; household goods mounted on a base or the like with casters or rubber feet; powered equipment with feet, casters or rubber feet; equipment mounted on a base or the like with casters or rubber feet; agricultural machinery with symmetrical wheels such as tractors, combine harvesters, rice planting machines and pest control machines; transport machinery with front and rear wheels such as motorized motorcycles and electric motorcycles; transport machinery with symmetrical wheels or caterpillars such as passenger cars, trucks, trailers, forklifts, shovel loaders, bulldozers, wheel cranes and helicopters; helicopters with landing skids, etc. Here, "having symmetrical wheels" means that the total number of wheels does not have to be an even number, and usually includes three-wheeled transport vehicles. In addition, "underside" means the surface where a straight line extending vertically from the ground within the area enclosed by the ground contact point, ground line, or ground contact surface first intersects with the property. Therefore, in the case of a hollow ceiling that does not intersect with the property, it is not the underside of the property, and in the case of a four-wheeled automobile, the side mirrors are outside the area enclosed by the ground contact surfaces of the four tires, so they are not included in the underside of the property.

[0019] In this specification, to say that the waterproof sheet has "dimensional margin" means that the width and / or front-to-rear dimensions of the waterproof sheet are larger than the shortest distance between the grounding point, grounding line, or grounding surface. A guideline for the larger dimensions can be, for example, more than twice the minimum ground clearance of the bottom surface of the property and less than twice the maximum ground clearance of the bottom surface of the property.

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. The waterproof bag 1 for automobiles according to this embodiment is a waterproof bag of a generally rectangular parallelepiped shape, as shown in Fig. 1A. The waterproof bag itself is made up of a plain white waterproof sheet 21 and its joint 23, with a front surface 6 directly exposed to water and a back surface 8 facing property, the lower side being the vehicle body storage section 2, and an upper side being the lid section 3 covering the opening of the vehicle body storage section. One lower edge of the lid section 3 and one upper edge of the vehicle body storage section 2 are integrated with piping 3, and the three lower edges of the lid section and the corresponding three upper edges of the vehicle body storage section are equal in length, and fastener elements 24 of the same shape and size are provided on each of them, and a slider 25 for engaging and separating the fastener element 24a of the vehicle body storage section 2 from the fastener element 24b of the lid section 3 is slidably arranged on the fastener element 24a of the vehicle body storage section 2.

[0021] In this embodiment, a 0.1 mm thick polyester resin sheet material (Kurea Sheet, manufactured by Kurea Co., Ltd.) with a water-repellent front surface and a hydrophilic back surface is used as the waterproof sheet 21, but as long as the material has a certain degree of water pressure resistance, the same or different materials can be used without any particular limitation from among polyester, polypropylene, polyamide, fluorine fiber, aramid fiber, etc. The thickness of the waterproof sheet is usually in the range of 0.05mm to 0.15mm, since it must be lightweight as well as water-resistant and scratch-resistant in order to protect property from water intrusion and to be able to adhere closely to the shape of the underside of the property. The weight of a waterproof sheet is usually 50g / m2 because it must be lightweight as well as water-resistant and scratch-resistant to protect property from water intrusion and to be able to fit closely to the shape of the underside of the property. 2 ~100g / m 2 The range may be:

[0022] 1A and 1B, two pieces of black interior lining sign cloth 27a, 27b are attached to the inside bottom surface 26 of the vehicle body storage section 2 along the vehicle width direction W with a distance L of 1.3 times the diameter of the wheel. Furthermore, a white interior lining cloth 30 of width L is attached between the black interior lining sign cloths 27a, 27b in the hope of providing strength to the outermost joint portion 23. In this embodiment, the material of the lining sign cloth 27a, 27b is the same as that of the waterproof sheet 21, which is suitable for welding by an ultrasonic welder, and the bonding method is to form a dotted welding surface area 28 around the lining sign cloth 27a, 27b by an ultrasonic welder. The reason for performing the dotted welding is that the lining sign cloth 27a, 27b is intended to be a sign for the position where the wheels are placed, and there is no need to weld the entire circumference of the sign cloth, and by reducing the area of ​​the welding surface area 28, the penetration of water through the welding surface area 28 can be suppressed as much as possible. Note that, as a joining method, adhesion by adhesive can be adopted instead of welding, although it requires some sacrifice in terms of light weight, drying time, and productivity.

[0023] The vehicle width direction dimension W of the vehicle body storage section 2 varies depending on the vehicle model, but is set so that when the tires of the vehicle are placed on the interior trim sign cloths 27a, 27b, the actual width dimension of the waterproof sheet 43 laid between the left and right wheels is 0.7 to 1.8 times the tire diameter larger than the distance D between the left and right wheels, as shown in Fig. 1C. If the width dimension is less than 0.7 times the tire diameter, there may not be enough space to fit closely depending on the shape of the underside of the chassis, while if it exceeds 1.8 times, it will simply be excess cloth, which will be difficult to handle and will be a factor in increasing costs.

[0024] The longitudinal dimension of the vehicle body storage section varies depending on the vehicle model, but is set so that when the vehicle tires are placed on the interior lining sign cloth, the actual length dimension of the waterproof sheet 21 laid between the front and rear wheels is 0.7 to 1.8 times the tire diameter larger than the distance between the front and rear wheels. If the longitudinal length dimension is less than 0.7 times the tire diameter, there may not be enough space to fit closely depending on the shape of the chassis underside, while if it exceeds 1.8 times, it will simply be excess cloth, which will be difficult to handle and will be a factor in increasing costs.

[0025] Whether a dimensional allowance is provided between the left and right wheels or between the front and rear wheels depends on whether the joint runs in the vehicle length direction or the vehicle width direction. Since the joint is particularly vulnerable to forces pulling it apart, if the joint runs in the vehicle length direction, a dimensional allowance is provided between the left and right wheels, and if the joint runs in the vehicle width direction, a dimensional allowance is provided between the front and rear wheels. In this embodiment, as shown in Figures 1A and 1B, the joint 23 runs in the vehicle length direction, so a dimensional allowance is provided between the left and right wheels.

[0026] A reinforcing patch 29 is applied to the outer lower corners of the vehicle body storage section 2. In this embodiment, the reinforcing patch 29 is made of the same material as the waterproof fabric patch, and is applied from the outside of the waterproof fabric patch using acrylic adhesive. Alternatively, it may be applied from the inside of the waterproof fabric patch. By making appropriate cuts (notches) in the surfaces of the reinforcing patch that contact each surface of the lower corners, it becomes easier to fit around the lower corners and to adhere. As an alternative method to using an adhesive to join the reinforcing patch fabric 29 and the waterproof fabric joint 1, any method can be used, such as welding with an ultrasonic welder, welding with a high-frequency welder, welding with a heated roller after sewing with a sewing machine using meltable thread, etc., but it is desirable to keep this to a minimum when considering the infiltration of water through the welded parts, etc.

[0027] When manufacturing the vehicle body storage section 2, the waterproof sheets are joined together as follows: That is, as shown in Fig. 2, a step (S11) of overlapping the first waterproof sheet 12 and the second waterproof sheet 14 so that the back surfaces 18 that are not exposed to water face each other and aligning the first end 13 and the second end 15, a step (S12) of surrounding the first end 13 of the first waterproof sheet 12 and the second end 15 of the second waterproof sheet 14 with piping material 34 and sewing together the piping material 34 with thread 32 to form a piping part 33, and a step (S13) of spreading the first waterproof sheet and the second waterproof sheet so that the piping part 33 is on top. (S13), a step of laying the piping portion on one side toward the surface of the first waterproof sheet or the second waterproof sheet that will be facing forward (S14), a step of covering the piping portion 33 with surrounding material 36 (S15), a step of welding the surrounding material 36 and the first waterproof sheet 2 at a position a predetermined distance away from the piping portion 33 with an ultrasonic welder to form welded portion 37 (S16-1), and a step of welding the surrounding material 36 and the second waterproof sheet 4 at a position a predetermined distance away from the piping portion 33 with an ultrasonic welder to form welded portion 37 (S16-2).

[0028] The dimensions of the lid vary depending on the vehicle model, but are set according to the vehicle width and front-rear dimensions of the vehicle body storage. When manufacturing the lid, the waterproof sheets are joined together as follows. That is, the process includes a step (S11) of overlapping the first waterproof sheet 2 and the second waterproof sheet 4 so that the back surfaces 18 that are not exposed to water face each other to align the first end 3 and the second end 5, and a step (S12) of surrounding the first end 3 of the first waterproof sheet 2 and the second end 5 of the second waterproof sheet 4 with piping material 34 and sewing the piping material 34 together with thread 32 to form the piping part 33. This is because, unlike the vehicle body storage, even if rain hits the piping part 33, water pressure is rarely applied directly to the lid, and the degree of water ingress is also minor. EXAMPLES

[0029] Manufacturing Example 1 Two waterproof fabrics (made by Kureha) with a thickness of 0.1 mm, each made of a polyester resin sheet with a water-repellent surface on the front side and a hydrophilic surface on the back side, were prepared, and the first end of the first waterproof fabric and the second end of the second waterproof fabric were overlapped so that the back sides faced each other, sandwiched with a bias tape (manufactured by Corona Bias Co., Ltd.) processed into a double-folded type, and sewn with a polyester resin sewing thread (number 90, made by Teijin Co., Ltd.) and a sewing needle (needle number 9, made by Organ Needle Co., Ltd.) at a sewing pitch (spacing between sewing needle holes) of 2.5 mm, forming a piping part and joining the waterproof fabrics together. Next, the piping part was tilted to one side toward the side of the front side of the first waterproof fabric or the second waterproof fabric to give it a shape. Furthermore, a waterproof sheet piece (width 60 mm, made by Kureha Co., Ltd.) made of the same material as the target to be joined was placed over the joint where it was tilted to one side to straddle the joined waterproof fabrics. Finally, the waterproof sheet pieces and the joined waterproof fabric were welded together with an ultrasonic welder at a position 2 cm away on both sides from the base (root part) of the piping section to obtain a waterproof fabric joint product. By joining the waterproof fabrics together in the above manner, we produced a roughly rectangular waterproof bag (bottom width 1,880 mm, length 3,500 mm, height 2,000 mm) as shown in Figure 1, with a width allowance of 1.3 times the tire diameter (534 mm) (approximately 700 mm) compared to the 1,125 mm distance between the left and right wheels of an average light vehicle. Two black guide strips (565mm wide, 3500mm long) were placed on the inside bottom surface of the waterproof bag, spaced 750mm apart in the width direction of the vehicle, and a white strip (750mm wide, 3500mm long) was placed between the black guide strips, and these three strips were ultrasonically welded to the waterproof bag fabric. Meanwhile, reinforcing patch fabric was placed on the outside lower corners of the waterproof bag and attached to the waterproof bag fabric with acrylic adhesive.

[0030] Experimental Example 1 First, we spread out only the bottom part of a vinyl pool (2200mm wide x 4500mm long x 840mm high, manufactured by INTEX), which is roughly rectangular in plan view, and then spread out the bottom part of the vehicle body storage part of the waterproof bag on top of it, with the black guide strips corresponding to the positions where the wheels will be placed visible as shown in Figure 3A. However, only the white strip was pulled toward the center in the vehicle width direction and gathered in pleats so that the widthwise interval between the two black guide strips was 375mm. As shown in Figures 3B, 3C, and 3D, a minicar (Every, manufactured by Suzuki) was brought in so that the left, right, front, and rear wheels were placed on the black guide belt, and the roof of the minicar was covered with a roughly rectangular top cover as shown in Figure 3E, and the zipper formed along the three upper edges of the waterproof bag was closed as shown in Figure 3F. After that, the pool was assembled and water was poured into it, and water was stored until the water depth reached about 470 mm as shown in Figure 4. During the water pouring process, as shown in Figure 5, the tires of the minicar were on the ground in the vinyl pool, and the sheet that had been pulled up floated due to the water pressure, and as shown in Figure 6, the excess waterproof sheet 43 and the joint part 23 were stuck together and adhered roughly along the shape of the bottom chassis. After that, when the water depth exceeded 470 mm, as shown in Figure 7, the left rear wheel of the minicar began to float in the vinyl pool, but the waterproof cover continued to adhere to the bottom chassis as shown in Figure 6. Finally, about four hours after the start of the water injection, the water was removed from the vinyl pool and the inside of the bag was checked. A small amount of water was observed, but it was only a small amount and did not reach the muffler. From the above facts, it was estimated that the water pressure resistance of the joints that were not in contact with the bottom chassis could be expected to be at least 470 mm.

[0031] (Water pressure test) For the waterproof fabric jointed product obtained in Manufacturing Example 1, five test pieces were prepared by cutting them to 200 mm long x 200 mm wide so as to include the seam (piping seam) across. The test pieces were attached to the sample stand of a water resistance tester (Textile Water Resistance Tester, manufactured by Daiei Kagaku Seiki Seisakusho) so that the front side of the test pieces were exposed to water, and the water level of the leveling device was raised at a rate of 100 mm / min in accordance with the water resistance test (hydrostatic pressure method) A method specified in JIS L 1092, and the water level when water came out from three places on the back side of the test pieces was measured in mm units. The average value of five measurements was measured and was 657 mm. It was found that this corresponds to more than 50% of the water pressure resistance value (1300 mm) of the waterproof fabric itself that had already been obtained by the same test method under the same conditions.

[0032] The present invention is not limited to the above-mentioned embodiment, and not all of the configurations described in the above-mentioned embodiment are essential requirements of the present invention. The present invention may be modified in various ways, including combining elements disclosed in different embodiments, without departing from the technical concept of the present invention. For example, as shown in FIG. 3F, the lid may be provided with a canopy 22 for covering the fastener element. This is to prevent rain from entering the bag through the gaps in the fastener element. [Industrial Applicability]

[0033] The waterproof fabric patchwork of the present invention can be used to cover the entirety of expensive property that needs to be protected from flooding, such as commercial refrigerators, generators, pumps, household goods, electrical appliances, machine tools, agricultural machinery, private cars, helicopters, etc., thereby expanding the uses of waterproof sheets and thus having great industrial applicability. [Explanation of symbols]

[0034] 1. Waterproof fabric patchwork (waterproof bag for automobiles) 2 Vehicle storage area 3 Lid 4 Upper edge of vehicle body storage area 5 Bottom edge of the lid 7 Piping 9 The three bottom edges of the lid 11 Top three sides of the vehicle body storage area 12 First waterproof sheet 13 First end 14 Second waterproof sheet 15 Second end 6,16 Front side (front side) 8,18 Back side (the side that comes behind) 32 Thread 33 Joint (piping) 34 Piping materials 35 Parts where welding is expected 36 Siege Materials 37 Welded area 38 Interface area (welding surface area) 21 Waterproof Sheet 22 Flap 23 Joint 24, 24a, 24b Fastener elements 25 Slider 26 Inner bottom surface 27a, 27b Lining sign cloth 28 Welding area 29 Reinforcement patch 30 White lining 41 Automobiles 43 Waterproof sheet placed between the left and right wheels W Vehicle width dimension D Distance between left and right wheels L White lining fabric width

Claims

1. This waterproof fabric splice is manufactured by splicing waterproof sheets to enclose property whose entire lower surface is not a placement surface, and the waterproof fabric splice has a dimensional allowance in the waterproof sheet laid under the property.

2. 2. The waterproof fabric patchwork product according to claim 1, wherein the dimensional allowance is more than twice the minimum ground clearance of the bottom surface of the property and less than twice the maximum ground clearance of the bottom surface of the property.

3. The waterproof sheet has a thickness of 0.05 mm to 0.15 mm and a weight of 50 g / m2, and the front surface that is directly exposed to water is water repellent, and the back surface that faces the property is hydrophilic. ２ ~100g / m ２ 3. The waterproof fabric joint product according to claim 1 or 2, which is made of a polyester resin sheet material.

4. The waterproof fabric patchwork product according to claim 1, wherein the property whose underside is not entirely a loading surface is a transport or agricultural machine having symmetrical wheels or front and rear wheels, and when the transport or agricultural machine is loaded, the actual dimension of the waterproof sheet laid between the left and right wheels or the front and rear wheels is 0.7 to 1.8 times larger than the distance between the left and right wheels or the front and rear wheels than the distance between the left and right wheels or the front and rear wheels.

5. 5. The waterproof fabric patchwork of claim 4, further comprising an interior lining marking fabric for visually identifying where the wheels should be placed.

6. The waterproof fabric joint product according to claim 1, wherein the waterproof fabric joint product is a bag consisting of a vehicle body storage section and a lid section that covers the opening of the vehicle body storage section, and a fastener member for closing the opening of the bag is provided on the periphery of the lid section and the periphery of the upper end of the vehicle body storage section.

7. 2. The waterproof fabric patch of claim 1, further comprising a reinforcing patch at the bottom corners.

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