Bed sheet

Abstract

To provide a floor sheet capable of securing cut-off performance and foreign matter intrusion prevention even without using a sealing material.SOLUTION: A floor sheet according to an embodiment of the present invention comprises a base layer, and a surface layer laminated on a surface side of the base layer via an adhesive layer. The base layer is formed by a plurality of first patch sheets arranged by butting outer edges, and the surface layer is formed by a plurality of second patch sheets arranged by butting outer edges. Therefore, a joint of the first patch sheets and a joint of the second patch sheets do not overlap and run side by side in a plane view.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a floor sheet.

Background Art

[0002] The floor structures provided in vehicles such as trains and buses, and buildings are formed by laminating a floor sheet on the surface of a floor material. Such a floor structure generally has a large area, and it is difficult to cover the surface of the floor material with a single floor sheet. For example, to cover the surface of a railway floor material, a long sheet-shaped rubber sheet is used, and a plurality of sheets are used to cover from one end to the other end in the short side direction of the railway vehicle floor surface (see, for example, International Publication No. 2018 / 008277).

[0003] When using a plurality of floor sheets arranged side by side in this way, there is a risk that water and foreign matter may enter from the joint where the outer edges are butted to the surface of the floor structure. For this reason, a sealing material is applied to the joint to prevent water leakage and the intrusion of foreign matter.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When using a sealing material at the joint of the floor sheet, the number of construction man-hours increases, the construction period and cost increase, and discontinuous portions with different hardnesses and heights are likely to occur on the surface of the floor sheet near the joint.

[0006] The present invention has been made in view of such circumstances, and an object thereof is to provide a floor sheet that can ensure water leakage prevention and foreign matter intrusion prevention without using a sealing material.

Means for Solving the Problems

[0007] The floor sheet according to an embodiment of the present invention includes a base layer and a surface layer laminated on the surface side of the base layer via an adhesive layer. The base layer is formed by a plurality of first patch sheets arranged with their outer edges butted against each other, and the surface layer is formed by a plurality of second patch sheets arranged with their outer edges butted against each other. The joints between the first patch sheets and the joints between the second patch sheets do not overlap and run parallel to each other in a plan view.

Effect of the Invention

[0008] The floor sheet of the present invention can ensure water tightness and prevention of foreign matter intrusion without using a sealing material.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Mode for Carrying Out the Invention

[0010] [Description of Embodiment of the Present Invention] First, the embodiments of the present invention will be listed and described.

[0011] The floor sheet according to an embodiment of the present invention includes a base layer and a surface layer laminated on the surface side of the base layer via an adhesive layer. The base layer is formed by a plurality of first patch sheets arranged with their outer edges butted against each other, and the surface layer is formed by a plurality of second patch sheets arranged with their outer edges butted against each other. The joints between the first patch sheets and the joints between the second patch sheets do not overlap and run parallel to each other in a plan view.

[0012] The joints between the surface layer and the base layer of the mattress sheet do not overlap and run parallel in plan view. Also, since the space between the surface layer and the base layer is sealed with an adhesive layer, even if water or foreign matter were to enter through the joints of the surface layer, it would be prevented from moving along the adhesive layer at the boundary between the surface layer and the base layer, making it difficult for it to reach the joints of the base layer. Therefore, the mattress sheet can prevent water and foreign matter from reaching the surface of the floor structure, ensuring water resistance and prevention of foreign matter intrusion without using a sealing material.

[0013] It is preferable that no sealing material is used at least at the joints between the second patch sheets. As described above, the mattress sheet can ensure water resistance and prevention of foreign matter intrusion without using a sealing material at the joints between the second patch sheets.

[0014] A pair of outer edges forming the joint between the second patch sheets may be butted against each other on the front side and separated on the back side. By butting the pair of outer edges forming the joint between the second patch sheets against each other on the front side and separating them on the back side in this way, the contact pressure at the butted portion increases, enhancing the effects of water resistance and prevention of foreign matter intrusion.

[0015] The adhesive layer may have a convex portion protruding between a pair of outer edges forming the joint between the second patch sheets. By providing such a convex portion protruding between the pair of outer edges in the adhesive layer, the effects of water resistance and prevention of foreign matter intrusion can be further enhanced.

[0016] The plurality of first patch sheets and the plurality of second patch sheets are each in a long shape, and it is preferable that their outer edges extending in the longitudinal direction are butted against each other and arranged. By configuring the plurality of first patch sheets and the plurality of second patch sheets in this way, the joints between the first patch sheets and the joints between the second patch sheets can be arranged so as not to intersect in plan view, further enhancing the effects of water resistance and prevention of foreign matter intrusion.

[0017] In plan view, it is preferable that the minimum distance between the joints of the first patch sheets and the joints of the second patch sheets is 2 cm or more. By setting the minimum distance to be equal to or greater than the above lower limit, the water-stopping property and the effect of preventing foreign matter intrusion can be further enhanced.

[0018] Here, "not overlapping and running parallel in plan view" is a concept that includes not only having no overlap in plan view but also cases where the angle formed by the tangents of the joints at the overlapping points in plan view is 80 degrees or more, preferably 90 degrees.

[0019] [Details of Embodiments of the Present Invention] Hereinafter, a floor sheet according to an embodiment of the present invention will be described with reference to the drawings.

[0020] The floor sheet 1 shown in FIG. 1 includes a base layer 10 and a surface layer 20 laminated on the surface side of the base layer 10. The surface layer 20 is laminated via a first adhesive layer 30. Further, the floor sheet 1 includes a second adhesive layer 40 on the back side of the base layer 10.

[0021] The floor sheet 1 is laid on a floor surface X of a vehicle, a building, or the like. Among them, the floor sheet 1 is preferably laid on the floor surface X of a railway vehicle.

[0022] <Base Layer> The base layer 10 is formed by a plurality of first patch sheets 11. The plurality of first patch sheets 11 are arranged with their outer edges 11a butted against each other. Specifically, the plurality of first patch sheets 11 are each in a long shape, and their outer edges 11a extending in the longitudinal direction are butted against each other and arranged.

[0023] The first patch sheet 11 is formed of a flame-retardant rubber composition. This flame-retardant rubber composition is obtained by vulcanizing one or more rubber components. This flame-retardant rubber composition preferably contains an inorganic flame retardant in addition to the rubber component. Note that, as the rubber component, a pre-vulcanized one may be used. Further, as the rubber component, for example, styrene-butadiene rubber or the like can be adopted. Here, the styrene / butadiene weight ratio is not particularly limited, but it is preferably 23.5 or more and less than 46. Within this ratio range, processing can be easily performed by ordinary rubber processing equipment.

[0024] The inorganic flame retardant contained in the flame-retardant rubber composition is preferably contained in an amount of 50 parts by weight or more, more preferably 55 parts by weight or more, and still more preferably 60 parts by weight or more with respect to 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. Also, the inorganic flame retardant is preferably contained in an amount of less than 90 parts by weight, more preferably less than 80 parts by weight, and still more preferably less than 70 parts by weight with respect to 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. When the content of the inorganic flame retardant is at least the above lower limit value, the flame retardancy of the floor sheet 1 is improved, and when it is less than the above upper limit value, a decrease in the rubber properties of the floor sheet 1 can be suppressed.

[0025] Various inorganic flame retardants can be adopted for the flame-retardant rubber composition, but from the viewpoint of suppressing smoke generation, it is preferably aluminum hydroxide, antimony trioxide, or both. Further, from the viewpoint of enhancing flame retardancy such as reducing smoke generation, the flame-retardant rubber composition forming the first patch sheet 11 preferably contains chlorinated paraffin as a flame retardant other than inorganic ones in addition to aluminum hydroxide and antimony trioxide.

[0026] The above aluminum hydroxide is preferably contained in an amount of 70 parts by weight or more, more preferably 75 parts by weight or more, and still more preferably 78 parts by weight or more, based on 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. Further, this aluminum hydroxide is preferably contained in an amount of less than 88 parts by weight, more preferably less than 85 parts by weight, and still more preferably less than 82 parts by weight, based on 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. When the content of aluminum hydroxide is equal to or higher than the above lower limit value, the amount of smoke generation can be suppressed and the flame retardancy of the floor sheet 1 is improved. When the content is less than the above upper limit value, a decrease in rubber properties can be suppressed.

[0027] The above antimony trioxide is preferably contained in an amount of 2 parts by weight or more, more preferably 3 parts by weight or more, and still more preferably 4 parts by weight or more, based on 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. Further, this antimony trioxide is preferably contained in an amount of less than 8 parts by weight, more preferably less than 7 parts by weight, and still more preferably less than 6 parts by weight, based on 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. When the content of antimony trioxide is equal to or higher than the above lower limit value, the flame retardancy of the floor sheet 1 is improved. When the content is less than the above upper limit value, a decrease in rubber properties can be suppressed.

[0028] Furthermore, the above chlorinated paraffin is preferably contained in an amount of 0.5 parts by weight or more, more preferably 1 part by weight or more, and still more preferably 1.5 parts by weight or more, based on 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. Further, this chlorinated paraffin is preferably contained in an amount of less than 15 parts by weight, more preferably less than 10 parts by weight, and still more preferably less than 9 parts by weight, based on 100 parts by weight of the rubber component contained in the flame-retardant rubber composition. When the content of chlorinated paraffin is equal to or higher than the above lower limit value, the flame retardancy of the floor sheet 1 is improved. When the content is less than the above upper limit value, the toxicity of the combustion gas generated during combustion can be reduced.

[0029] Although the number of carbon atoms and the chlorination rate of this chlorinated paraffin are not particularly limited, the number of carbon atoms is preferably 12 or more and less than 26. Further, the chlorination rate expressed as the ratio of the atomic weight of chlorine atoms in the molecular weight of chlorinated paraffin is preferably 40% or more and less than 70% from the viewpoint of imparting flame retardancy.

[0030] In addition to the above-described flame retardant, the flame-retardant rubber composition forming the first patch sheet 11 can also contain various additives such as clay, calcium carbonate, zinc oxide, and titanium oxide.

[0031] The lower limit of the thickness of the first patch sheet 11 is preferably 0.5 mm, more preferably 1 mm. On the other hand, the upper limit of the thickness of the first patch sheet 11 is preferably 2 mm, more preferably 1.5 mm. If the thickness of the first patch sheet 11 is less than the above lower limit, the strength of the base layer 10 may be insufficient. Conversely, if the thickness of the first patch sheet 11 exceeds the above upper limit, there may be a risk that handling becomes difficult, such as difficulty in winding and storing. Here, "thickness" means the average thickness measured in accordance with JIS K7130. Specifically, it means the average value obtained by measuring the thickness at 10 equally spaced positions in the width direction of the first patch sheet 11 using a thickness gauge. The thickness is defined in the same way for other members.

[0032] The length of the first patch sheet 11 is not particularly limited, but it preferably has a length such that the entire longitudinal direction of the floor surface X of the railway vehicle is covered by a single first patch sheet 11. Specifically, the lower limit of the length of the first patch sheet 11 is preferably 10 m, more preferably 12 m, further preferably 14 m, and particularly preferably 16 m. On the other hand, the upper limit of the length of the first patch sheet 11 is preferably 28 m, more preferably 26 m, further preferably 24 m, and particularly preferably 22 m.

[0033] The width (length in the short side direction) of the first patch sheet 11 is not particularly limited, but it is preferable that the first patch sheet 11 has a width that covers the entire width direction of the floor surface of the railway vehicle with a plurality of (for example, three) first patch sheets 11. Specifically, as the lower limit of the width of the first patch sheet 11, 0.3 m is preferable, 0.5 m is more preferable, and 0.9 m is even more preferable. On the other hand, as the upper limit of the width of the first patch sheet 11, 1.5 m is preferable, and 1.2 m is more preferable. If the width of the first patch sheet 11 is less than the above lower limit, the number of joints 11b between the first patch sheets 11 increases, so the water blocking property and the effect of preventing foreign matter intrusion may decrease. Conversely, if the width of the first patch sheet 11 exceeds the above upper limit, the handling may become difficult. Note that the widths of the plurality of first patch sheets 11 are not necessarily the same.

[0034] It is preferable that a pair of outer edges 11a constituting the joint 11b between the first patch sheets 11 are butted against each other over the entire length and are not separated. By not separating the joints 11b between the first patch sheets 11 in this way, it is easy to suppress the intrusion of water and foreign matter to the surface of the floor surface X.

[0035] <Surface layer> The surface layer 20 is formed by a plurality of second patch sheets 21. The plurality of second patch sheets 21 are arranged with their outer edges 21a butted against each other. Specifically, the plurality of second patch sheets 21 are each in a long shape, and the outer edges 21a extending in the longitudinal direction thereof are butted against each other and arranged.

[0036] In addition, the joint 11b between the first patch sheets 11 and the joint 21b between the second patch sheets 21 do not overlap and run parallel in a plan view. In the floor sheet 1, the plurality of first patch sheets 11 and the plurality of second patch sheets 21 are in a long shape, and the outer edges 11a, 21a extending in the longitudinal direction thereof are butted against each other and arranged, so that the joint 11b between the first patch sheets 11 and the joint 21b between the second patch sheets 21 are arranged so as not to intersect in a plan view. By adopting such a configuration, the effects of water blocking property and foreign matter intrusion prevention can be further enhanced.

[0037] The second patch sheet 21 can have the same composition as the first patch sheet 11. In particular, from the viewpoint of ensuring the adhesive force by the first adhesive layer 30, it is preferable that the first patch sheet 11 and the second patch sheet 21 have the same composition.

[0038] The thickness of the second patch sheet 21 can be the same as the thickness of the first patch sheet 11. The thickness of the first patch sheet 11 and the thickness of the second patch sheet 21 may be different.

[0039] The length of the second patch sheet 21 is not particularly limited, but is made the same as the length of the first patch sheet 11.

[0040] The width of the second patch sheet 21 can be the same as the width of the first patch sheet 11, but the width is appropriately adjusted so that the joint 11b between the first patch sheets 11 and the joint 21b between the second patch sheets 21 do not overlap and run parallel in plan view. For this reason, the widths of the plurality of second patch sheets 21 are not necessarily the same, but from the viewpoint of design, it is preferable that the widths of the plurality of second patch sheets 21 are equal.

[0041] In plan view, as the minimum distance between the joint 11b between the first patch sheets 11 and the joint 21b between the second patch sheets 21, 2 cm is preferable, 5 cm is more preferable, and 10 cm is even more preferable. By setting the minimum distance to be equal to or greater than the above lower limit in this way, the water-stopping property and the effect of preventing foreign matter intrusion can be further enhanced. Among them, as shown in FIG. 1, it is particularly preferable that the joint 11b between the first patch sheets 11 is located at the center in the width direction of the second patch sheet 21. By positioning the joint 11b between the first patch sheets 11 in this way, the water-stopping property and the effect of preventing foreign matter intrusion can be maximized.

[0042] It is preferable that no sealing material is used at least at the joint 21b between the second patch sheets 21, and preferably at both the joint 11b between the first patch sheets 11 and the joint 21b between the second patch sheets 21. The floor sheet 1 can ensure water stoppage and prevention of foreign matter intrusion even without using a sealing material at the joint 21b between the second patch sheets 21.

[0043] As shown in FIG. 2, a pair of outer edges 21a constituting the joint 21b between the second patch sheets 21 are butted against each other on the front surface side and are separated on the back surface side. By butting a pair of outer edges 21a constituting the joint 21b between the second patch sheets 21 against each other on the front surface side and separating them on the back surface side, the contact pressure at the butted portion is increased, and the effects of water stoppage and prevention of foreign matter intrusion can be enhanced.

[0044] <First Adhesive Layer> The first adhesive layer 30 adheres the first patch sheet 11 and the second patch sheet 21.

[0045] As the lower limit of the thickness of the first adhesive layer 30, 50 μm is preferable, 60 μm is more preferable, and 70 μm is even more preferable. On the other hand, as the upper limit of the thickness of the first adhesive layer 30, 500 μm is preferable, 300 μm is more preferable, and 200 μm is even more preferable. By setting the thickness of the first adhesive layer 30 to be equal to or greater than the above lower limit, the first patch sheet 11 and the second patch sheet 21 can be firmly fixed. As a result, relative position changes and peeling between the first patch sheet 11 and the second patch sheet 21 can be more reliably suppressed. Conversely, if the thickness of the first adhesive layer 30 exceeds the above upper limit, there is a risk that the first patch sheet 11 and the second patch sheet 21 may be easily displaced during construction or use.

[0046] Examples of the first adhesive layer 30 include a layer formed by an adhesive, a layer formed by a pressure-sensitive adhesive, and a layer formed by a double-sided tape including a film-like base material and pressure-sensitive adhesive layers laminated on both surfaces of the base material. Among these, as the first adhesive layer 30, a layer having adhesiveness, that is, a layer formed by an adhesive and a layer formed by the above double-sided tape are preferable, and a layer formed by an adhesive is more preferable. A layer having an adhesive can facilitate the laying work, has excellent peelability when peeling work is required, and has high handleability and durability.

[0047] When the first adhesive layer 30 is formed by an adhesive, examples of the adhesive include reactive adhesives such as two-component mixed adhesives, hot melt adhesives, solvent-based adhesives, and water-dispersion adhesives.

[0048] When the first adhesive layer 30 is formed by a pressure-sensitive adhesive, examples of the pressure-sensitive adhesive include silicone-based pressure-sensitive adhesives mainly composed of silicone rubber, rubber-based pressure-sensitive adhesives mainly composed of rubbers other than silicone rubber, acrylic-based pressure-sensitive adhesives mainly composed of acrylic resin, and urethane-based pressure-sensitive adhesives mainly composed of urethane resin. Among these, acrylic-based pressure-sensitive adhesives are preferable. Here, the "main component" refers to the component with the highest content, for example, a component with a content of 50% by mass or more.

[0049] The acrylic resin, which is the main component of the above acrylic-based pressure-sensitive adhesive, can be obtained, for example, by vinyl polymerization of an alkyl (meth)acrylate by a conventional method. Further, from the viewpoint of improving optical properties, heat resistance, etc., the acrylic resin may be a copolymer of an alkyl (meth)acrylate and a modifying monomer.

[0050] (Meth)acrylic acid alkyl esters have a linear or branched alkyl group. The lower limit of the number of carbon atoms of the alkyl group is usually 1, preferably 4. On the other hand, the upper limit of the number of carbon atoms of the alkyl group is preferably 18, more preferably 12. Specific examples of (meth)acrylic acid alkyl esters include, for example, butyl (meth)acrylate, isobutyl (meth)acrylate, hexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isooctyl (meth)acrylate, isononyl (meth)acrylate, allyl (meth)acrylate, lauryl (meth)acrylate, stearyl (meth)acrylate, and the like. The (meth)acrylic acid alkyl ester may be used alone or in combination of two or more.

[0051] The above acrylic pressure-sensitive adhesive may further contain a curing agent such as an isocyanate-based curing agent, a plasticizer, an antioxidant, a reinforcing agent, a filler, an antifoaming agent, a surfactant, and the like. When the above acrylic pressure-sensitive adhesive contains the above curing agent, the lower limit of the content of the curing agent in the above acrylic pressure-sensitive adhesive is preferably 0.1 part by mass, more preferably 0.4 part by mass, and further preferably 0.8 part by mass with respect to 100 parts by mass of the acrylic pressure-sensitive adhesive. On the other hand, the upper limit of the content of the curing agent is preferably 5 parts by mass, more preferably 3 parts by mass, and further preferably 1.5 parts by mass with respect to 100 parts by mass of the acrylic pressure-sensitive adhesive. When the content of the curing agent is less than the above lower limit, the elasticity of the adhesive layer 2 may decrease. Conversely, when the addition amount of the curing agent exceeds the above upper limit, the adhesive strength of the adhesive layer 2 may be insufficient.

[0052] When the first adhesive layer 30 is formed by a double-sided tape, examples of the base material of the double-sided tape include paper, synthetic resin film, cloth, and the like. Examples of the adhesive for forming the adhesive layer of the double-sided tape include the same adhesives as those described above.

[0053] The first adhesive layer 30 can be provided continuously over the entire interface between the base layer 10 and the surface layer 20 depending on the construction method. However, for example, when it is provided on the back side of the second patch sheet 21 that constitutes the surface layer 20, as shown in FIG. 1, it can be configured to have a joint 31b along the joint 21b of the second patch sheet 21. Even in this configuration, the water-blocking property and the effect of preventing foreign matter intrusion equivalent to those provided continuously over the entire interface can be obtained by the adhesive force between the first adhesive layers 30.

[0054] As shown in FIG. 2, the first adhesive layer 30 has a convex portion 32 that protrudes between a pair of outer edges 21a that form the joint 21b between the second patch sheets 21. By providing the convex portion 32 that protrudes between the pair of outer edges 21a in the first adhesive layer 30 in this way, the water-blocking property and the effect of preventing foreign matter intrusion can be further enhanced. The convex portion 32 can be formed, for example, by the compressive force when the surface layer 20 is bonded to the base layer 10.

[0055] The convex portion 32 is preferably provided so as to be in contact with the pair of outer edges 21a. Further, as the lower limit of the height of the convex portion 32, 0.01 mm is preferable, and 0.05 mm is more preferable. On the other hand, as the upper limit of the height of the convex portion 32, 0.15 mm is preferable, and 0.1 mm is more preferable. If the height of the convex portion 32 is less than the above lower limit, the effect of improving the water-blocking property and preventing foreign matter intrusion may be insufficient. Conversely, if the height of the convex portion 32 exceeds the above upper limit, it may be difficult to form the convex portion 32 while ensuring the adhesive force of the first adhesive layer 30 during construction.

[0056] <Second Adhesive Layer> The second adhesive layer 40 bonds the floor surface X and the base layer 10. Since the second adhesive layer 40 can be configured in the same manner as the first adhesive layer 30, detailed description thereof is omitted.

[0057] <Construction Method> The method of applying the floor sheet 1 will be described. Note that the construction method described below is an example and does not prevent the floor sheet 1 from being applied by other methods.

[0058] The installation method of the mattress sheet 1 includes a preparation process, a base layer formation process, and a surface layer formation process.

[0059] (Preparation process) In the above preparation process, the first patch sheet 11 and the second patch sheet 21 are pre-processed.

[0060] In the processing of the first patch sheet 11, for example, after the first patch sheet 11 is vulcanized and formed, a second adhesive layer 40 is applied to the back surface side (the ground surface side), and then the back surface side is covered with a release sheet over the entire surface.

[0061] As the above release sheet, various types can be adopted. For example, it can be composed of a plastic film such as polyethylene terephthalate or polyethylene, or a paper material such as crepe paper or release paper. However, as the above release sheet, from the viewpoint of increasing the elongation at break rate and the elongation recovery rate, a polyethylene sheet or crepe paper is preferably used.

[0062] As the lower limit of the elongation at break rate of the above release sheet, 10% is preferable, 20% is more preferable, 30% is further preferable, and 40% is particularly preferable. Also, as the lower limit of the elongation recovery rate of the above release sheet, 50% is preferable, 60% is more preferable, 70% is further preferable, and 80% is particularly preferable. By setting the elongation at break rate and the elongation recovery rate of the above release sheet to be equal to or higher than the above lower limit values, when the processed first patch sheet 11 is stored in a wound state around a core material or the like, the release sheet has the advantages that wrinkles, tears, gaps between the second adhesive layer 40, etc. do not occur. Note that the elongation at break rate is a value measured according to JIS K6251. Also, the elongation recovery rate is a value measured according to JIS L1096.

[0063] The release sheet preferably has a dividing line that is divided along the longitudinal direction. For example, a single dividing line is provided, and release pieces are formed on each side of the dividing line, and the release sheet can be constituted by this pair of left and right release pieces. By providing a dividing line on the release sheet, the release sheet can be peeled into two release pieces. In this case, with only one of the release pieces peeled off, the first patch sheet 11 is attached while being aligned with the floor surface X, and then the other release piece is peeled off and attached to fix the first patch sheet 11 to the floor surface X. By following such a procedure, it is possible to prevent the first patch sheet 11 from being inadvertently displaced during the implementation.

[0064] Here, the dividing line can also be constituted by a cutting line that penetrates the sheet from the front surface to the back surface in the thickness direction, and can also be constituted by an easy-cutting line for easily cutting the sheet when dividing in the longitudinal direction during peeling or the like. As this easy-cutting line, for example, it can also be constituted by a perforation or a surface groove.

[0065] The processing of the second patch sheet 21 can be performed in the same manner. That is, in the processing of the second patch sheet 21, for example, after the second patch sheet 21 is vulcanized and molded, the first adhesive layer 30 is applied to the back surface side (the ground surface side), and then the back surface side is covered with a release sheet over the entire surface.

[0066] (Base layer forming step) In the base layer forming step, the base layer 10 is formed by bonding a plurality of first patch sheets 11 to the floor surface X.

[0067] Specifically, the release sheets of the plurality of first patch sheets 11 are peeled off, and while the outer edges 11a are butted and arranged, they are attached to the floor surface X.

[0068] (Surface layer forming step) In the surface layer forming step, the surface layer 20 is formed by bonding a plurality of second patch sheets 21 to the base layer 10.

[0069] Specifically, the release sheets of the plurality of second patch sheets 21 are peeled off, and while the outer edges 21a are butted against each other and arranged, they are pasted onto the base layer 10. At this time, the joints 21b between the second patch sheets 21 are arranged so as not to overlap and run parallel to the joints 11b between the first patch sheets 11 in a plan view. This arrangement is realized by preliminarily adjusting the widths of the plurality of first patch sheets 11 and the plurality of second patch sheets 21. For example, for 4 first patch sheets 11, the widths of the two first patch sheets 11 at both ends are 450 mm, and the widths of the two first patch sheets 11 in the center are 9000 mm. For 3 second patch sheets 21, all have a width of 900 mm. As shown in FIG. 1, the joints 21b between the second patch sheets 21 can be configured not to overlap and run parallel to the joints 11b between the first patch sheets 11 in a plan view.

[0070] By the above procedure, the floor sheet 1 can be applied to the floor surface X of, for example, a railway vehicle.

[0071] <Advantages> In the floor sheet 1, the joints 11b and 21b between the surface layer 20 and the base layer 10 do not overlap and run parallel in a plan view. Further, since the space between the surface layer 20 and the base layer 10 is sealed by the first adhesive layer 30, even if water or foreign matter enters from the joint 21b of the surface layer 20, it is prevented from moving along the first adhesive layer 30 at the boundary between the surface layer 20 and the base layer 10, so it is difficult to reach the joint 11b of the base layer 10. Therefore, the floor sheet 1 can suppress water and foreign matter from reaching the surface of the floor structure, so that water resistance and prevention of foreign matter intrusion can be ensured without using a sealing material.

[0072] [Other Embodiments] The present invention is not limited to the above embodiments, and can be implemented in various modified and improved forms in addition to the above aspects.

[0073] In the above-described embodiment, a configuration in which a plurality of first patch sheets and a plurality of second patch sheets are each in a long shape and are arranged with their outer edges extending in the longitudinal direction butting against each other has been described. However, the shapes of the first patch sheets and the second patch sheets and the butting method are not limited to this as long as the joints between the first patch sheets and the joints between the second patch sheets do not overlap and run side by side in a plan view. For example, a plurality of first patch sheets and a plurality of second patch sheets may be in a concentric ring shape and configured such that adjacent rings are joined together. Also, as in the floor sheet 2 shown in FIG. 3, a configuration may be adopted in which a plurality of first patch sheets 12 and a plurality of second patch sheets 22 are each in a rectangular shape and the joints of their lengths and widths are orthogonal to each other in a plan view, that is, they do not overlap and run side by side, and the same effect can be achieved.

[0074] In the above-described embodiment, a configuration in which a pair of outer edges forming the joint between the second patch sheets are butted against each other on the front surface side and separated on the back surface side has been described. However, the configuration of the pair of outer edges forming the joint between the second patch sheets is not limited to this. For example, as the configuration of the pair of outer edges, a configuration in which they are butted against each other over the entire length and not separated can also be adopted.

[0075] Also, a configuration in which the adhesive layer has a convex portion protruding between a pair of outer edges forming the joint between the second patch sheets is not an essential configuration, and an adhesive layer without the above convex portion is also within the scope intended by the present invention.

Industrial Applicability

[0076] The floor sheet of the present invention can ensure water stoppage and prevention of foreign matter intrusion without using a sealing material.

Explanation of Reference Numerals

[0077] 1, 2 Floor sheet 10 Base layer 11, 12 First patch sheet 11a Outer edge 11b Joint 20 Surface layer 21 and 22, the second patch sheet 21a, outer edge 21b, joint 30, the first adhesive layer 31b, joint 32, convex part 40, the second adhesive layer X, floor surface

Claims

【Claim 1】 a base layer, a surface layer laminated via an adhesive layer on the surface side of the base layer, and comprising, the base layer is formed by a plurality of first patch sheets arranged with their outer edges butted together, the surface layer is formed by a plurality of second patch sheets arranged with their outer edges butted together, the joints between the first patch sheets and the joints between the second patch sheets do not overlap and run parallel in plan view, no sealing material is used at least at the joints between the second patch sheets, the floor sheet in which the adhesive layer is continuously provided over the entire interface between the base layer and the surface layer.

Images