Laying board

Abstract

To provide a lightweight resin-made floor plate that is used in a construction and civil engineering site, an event site, etc., and which can further suppress the warpage of the lightweight resin-made floor plate, especially, due to a temperature change, having a non-slip surface without glare.SOLUTION: Each layer of a floor plate of the present invention is formed in a sheet shape, a first layer 1 to be the uppermost surface part is constituted of a heat-shielding sheet formed by coating a synthetic resin mesh sheet with a metal thin metal film, and a second layer 2 is constituted of a synthetic resin sheet material, and the synthetic resin sheet material of the second layer 2 is melted on the surface of the first layer 1 by laminating the respective layers and press working of thermal welding using an upper die having a through-hole to eliminate the metallic color of the first layer 1, and a projection 8 of a through-hole shape is formed at a place where the through-hole is present on the surface of the first layer, and the synthetic resin sheet material of the second layer 2 is melted on the projection surface of the through-hole shape to form the spherical projection 8 projecting from the mesh of the first layer 1.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a floor board, and particularly to a lightweight resin floor board that suppresses warping due to temperature changes.

Background Art

[0002] In recent years, floor boards that are laid on laying surfaces such as the ground at construction and civil engineering sites, event venues, etc. are frequently used. For example, on the access road where vehicles and heavy machinery run at the construction site, or as a curing member to prevent damage to the road surface, or to ensure a safe passage for pedestrians, or to suppress the generation of dust at event venues, or to ensure a walking path from the mud after rain, etc., they are used for various purposes.

[0003] Here, when a heavy machine runs on an uneven ground and high rigidity of the floor board itself is required, an iron plate is used. However, a hoisting machine such as a crane must be used for laying and removal, and a large truck or trailer is also required during transportation such as loading and unloading.

[0004] In addition, in renovation work, renewal work, event venues, etc., a lightweight resin floor board is used to protect the existing floor or the maintained flat ground. Compared with an iron plate, the rigidity of the floor board itself is inferior, but it can withstand use to the extent that vehicles and heavy machinery run if the laying surface is almost a flat surface. Because of its light weight, it can be carried by one or two workers without using a hoisting machine, so the workability during laying and removal is good, and the transportation cost can also be suppressed compared with an iron plate. Therefore, it is widely used as a temporary or simple curing measure.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

[0006] However, as a characteristic of the resin material, the lightweight resin floor panel has a problem that it is easily affected by temperature changes. For example, in an environment where direct sunlight hits under the midsummer sun, the surface temperature of the floor panel may rise up to 90°C. When the surface of the floor panel becomes high temperature, since the surface expands particularly in the horizontal direction of the floor panel with respect to the back surface of the floor panel, a deformation such that the central part of the floor panel slightly swells is observed. In this state, the four corners of the floor panel are in contact with the ground, and since the step generated between adjacent floor panels is also small, it rarely hinders the running of vehicles or heavy machinery or pedestrians.

[0007] However, when direct sunlight hits under the midsummer sun and the surface of the floor panel becomes high temperature, and sudden rain such as an evening shower falls or water is splashed on the floor panel and the surface temperature is rapidly cooled, the surface temperature of the floor panel drops to 20 - 30°C and the resin shrinks. When the surface resin rapidly shrinks in the horizontal direction of the floor panel, the four corners of the floor panel are in a state of warping upward. In this state, a step is generated between adjacent floor panels, and there is a risk that the floor panel may shift when a vehicle or heavy machinery runs or a pedestrian may trip over the step.

[0008] Also, in a state where the four corners of the floor panel are warped upward, when a strong wind such as a gust blows, it is very easy for the wind to enter between the floor panel and the floor surface, and the possibility that the floor panel is blown away becomes extremely high. Once the four corners are warped upward, it takes a long time to become flat again and fit to the ground, so in some cases, the floor panel may be turned over and used depending on the situation.

[0009] However, in many cases, the use of the front and back of the lightweight resin floor panel is fixed. The surface has a convex pattern that protrudes so that the vehicle does not slip or pedestrians do not slip. The back surface is made of a material with a gripping force so that the floor panel is not easily displaced from the floor surface. And, as a countermeasure when the four corners of the floor panel are warped upward, using the floor panel upside down not only differs from the original usage method but also has the problem of requiring time and labor to turn the floor panel over.

[0010] Also, for warpage prevention, it is preferable to cover the front side with a heat insulation material made by processing a metal such as aluminum or stainless steel into a sheet shape. However, when a metal sheet is placed on the surface, there is a problem that glare of the metal color occurs and it is dazzling.

[0011] The present invention was devised in view of the above conventional situation, and can further suppress the warping upward due to temperature change, particularly of a lightweight resin floor panel used at construction and civil engineering sites, event venues, etc. Moreover, an object of the present invention is to provide a lightweight resin floor panel that eliminates the glare on the surface and has a non-slip surface.

Means for Solving the Problems

[0012] The present invention is Each layer is in the form of a sheet. The first layer, which is the topmost layer, is composed of a heat insulation sheet obtained by coating a synthetic resin mesh sheet with a metal thin film. The second layer is composed of a synthetic resin sheet material. By stacking each layer and performing press working of heat welding using an upper mold having through holes, the synthetic resin sheet material of the second layer melts out on the surface of the first layer, eliminating the metal color of the first layer, and at the locations of the through holes on the surface of the first layer, protrusions in the shape of through holes are formed. On the surface of the protrusions in the shape of through holes, the synthetic resin sheet material of the second layer melts and spherical protrusions protruding from the mesh openings of the first layer are formed. It is characterized by Or, Each layer is in the shape of a sheet. The first layer, which is the topmost layer, is composed of a heat-insulating sheet obtained by coating a synthetic resin mesh sheet with a metal thin film. The second layer is composed of a synthetic resin sheet material. The third layer is a synthetic resin reinforced fiber mesh member. The fourth layer is formed in a plate shape A soft member made of synthetic resin, The fifth layer is a thermoplastic synthetic resin material in the shape of a sheet. The sixth layer is a synthetic resin reinforced fiber mesh member similar to the third layer. The seventh layer, which is the bottommost layer, is composed of a hard polyethylene in the shape of a sheet made of synthetic resin and having gaps in a mesh shape The above-mentioned layers are stacked in order from the seventh layer with the sixth layer on top up to the first layer. By heat welding press processing, the sixth layer passes through the gaps of the seventh layer to form a displacement prevention portion on the lowermost surface portion. By heat welding press processing using an upper mold having through holes, the synthetic resin sheet material of the second layer melts out on the surface of the first layer to eliminate the metallic color of the first layer, and through hole-shaped protrusions are formed at the locations of the through holes on the surface of the first layer. On the surface of the through hole-shaped protrusions, the synthetic resin sheet material of the second layer melts to form spherical protrusions protruding from the mesh holes of the first layer The first layer prevents warping due to heat insulation, and the tensile strength of the synthetic resin reinforced fiber mesh members constituting the third layer and the sixth layer suppresses the expansion and contraction of the resin to prevent warping It is characterized by Or The through hole-shaped protrusions and the spherical protrusions serve as anti-slip materials when walking on the floorboard It is characterized by such.

Effect of the Invention

[0013] According to the lightweight resin floorboard with suppressed warping of the present invention, a polyester reinforced fiber sheet with high tensile strength is fixed between the hard film and the soft layer of the floorboard. Even when a rapid temperature change occurs in the floorboard, the warping of the floorboard can be suppressed, and the risks such as the floorboard shifting when a vehicle or heavy machinery is running or a pedestrian tripping over a step can be significantly reduced. In addition, when strong winds such as gusts blow, it is difficult for the wind to enter between the floorboard and the floor surface, the risk of the floorboard being blown away can be suppressed, and furthermore, the warping can be further suppressed. Moreover, an excellent effect can be achieved in that a floorboard with no glare on the surface and a non-slip surface can be provided.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Embodiments for Carrying Out the Invention

[0015] Hereinafter, the present invention will be described based on the embodiments shown in the drawings. The floorboard 10 according to the present invention is composed of, for example, seven layers in which each layer is in the shape of a rectangular sheet. And the outer shape of the floorboard 10 formed by, for example, pressing these seven layers is formed into a substantially rectangular shape having a predetermined thickness (for example, 18 mm). Note that the outer shape of the floorboard is not limited to the substantially rectangular shape.

[0016] First, the first layer 1 on the uppermost surface mainly serves as a heat insulation sheet. The first layer 1 is preferably formed by coating a metal thin film such as stainless steel on a synthetic resin mesh sheet, for example, a polyester mesh sheet. The first layer 1 having such a configuration is a heat insulation sheet configured to prevent warping, prevent slipping, and further prevent heat.

[0017] It might be considered to produce the heat insulation sheet with a stainless steel mesh sheet which is still a metal, but since it is too hard when made of metal, it is difficult to stick it to the surface and integrate it with other layers. Furthermore, the metallic glare on the surface of the stainless steel mesh sheet becomes a problem. It causes a state where it is too dazzling due to reflection. That is, if the surface of the floorboard 10 is shiny, it is blinding and hinders work, and also troubles such as peeling occur with a metallic heat insulation sheet. Therefore, it was formed by coating a polyester mesh sheet with a metal thin film such as stainless steel.

[0018] A second layer 2 is stacked below the first layer 1. For this second layer 2, a hard sheet member made of synthetic resin is used. For example, those configured in a thin sheet shape or a thin mesh sheet shape with rigid polyethylene are used.

[0019] Here, the first layer 1 and the second layer 2 are integrated by heat welding during press working. At this time, since the heat insulation sheet of the first layer 1 is in a mesh shape, a large number of protrusions 8 that protrude from the meshes of the mesh of the heat insulation sheet configured in a mesh shape of the first layer 1 to the surface side and form a substantially spherical shape are formed as a part of the rigid polyethylene constituting the second layer 2 jumps out during heat welding. Due to the protrusions 8, the surface of the floorboard has a rough texture, thereby exerting an anti-slip effect during walking.

[0020] By the way, as shown in FIG. 2, a plurality of Mountain-shaped protrusions 9 are also formed on the surface of the floorboard 10. These plurality of Mountain-shaped protrusions 9 are formed by press working using a mold provided with substantially elliptical holes. That is, since the substantially elliptical holes provided in the mold are through holes, when press working by heat welding, the portion of the substantially elliptical holes does not receive the pressing force from above. Therefore, a plurality of Mountain-shaped protrusions 9 are formed on the surface of the floorboard 10. Also, a part of the rigid polyethylene constituting the second layer melted by heat jumps out from the meshes of the mesh-shaped heat insulation sheet of the first layer 1, and this remains spherical on the Mountain-shaped protrusions 9 without being crushed. This is the protrusion 8 having a substantially spherical shape.

[0021] Mountain-shaped The protrusion 9 also functions as an anti-slip material when walking on the floorboard 10. Mountain-shaped A large number of protrusions 8 having a substantially spherical shape are formed on the protrusion 9, and roughness is generated on the surface of the floorboard 10. In this way, the protrusion 8 functions as an additional anti-slip measure. As described above, since it is pressed and welded while applying heat, for example, a green resin that constitutes the second layer 2 melts out from the mesh of the mesh sheet coated with the metal thin film that becomes the first layer 1. Therefore, the surface is covered with the melted resin and loses its metallic color. However, since the heat-insulating mesh sheet with the metal thin film constituting the first layer 1 is not completely buried, for example, it becomes green with a slightly silver tint, which controls the glare on the surface.

[0022] Next, for the third layer 3, a reinforcing fiber mesh member made of a synthetic resin having flame retardancy is used. For example, a reinforcing fiber mesh member made of polyester can be considered. By using a reinforcing fiber mesh member made of polyester instead of nylon, the tensile strength becomes superior to that of nylon. Therefore, by adopting polyester, the expansion and contraction of the resin are further suppressed. Thus, it is more effective in preventing warping.

[0023] Here, the reinforcing fiber mesh member is rectangular, for example, has mesh openings in a mesh shape, and the mesh openings are arranged so that the tensile strength is high in the longitudinal direction. That is, the formed floorboard 10 is likely to warp mainly at the longitudinal ends, and it is necessary to prevent warping at such locations.

[0024] Furthermore, for the fourth layer 4, a soft member made of a synthetic resin formed in a plate shape is used. For example, a soft member configured to be approximately 20 mm thick by foamed polyethylene can be considered. The fourth layer 4 constituted by the soft member serves to reduce the weight of the floorboard 10 and absorb impact and prevent vibration when a vehicle or heavy machinery travels on the floorboard 10, as will be described later.

[0025] Furthermore, for the fifth layer 5, a sheet-like thermoplastic synthetic resin material having a thickness of about 2 mm, for example, is used. The thermoplastic synthetic resin material is composed of an EVA material. The EVA material is very lightweight compared to rubber and PVC, and has the characteristics of being less likely to deteriorate even when continuously exposed to wind, rain, and ultraviolet rays. Also, it is an environmentally friendly material that does not easily become hard even in cold places and has excellent elasticity (cushioning properties).

[0026] Also, for the sixth layer 6, a reinforced fiber mesh member made of a synthetic resin having the same flame retardancy as the third layer 3 is used. In the present invention, a reinforced fiber mesh member that suppresses expansion and contraction and thus prevents warping is used for the third layer 3 and the sixth layer 6. The arrangement of the reinforced fiber mesh members at these two locations is also a major feature of the present invention.

[0027] And for the seventh layer 7, a hard member made of, for example, rigid polyethylene, which is a sheet-like and mesh-like synthetic resin, is used. Here, when the seven layers are stacked and heat-sealed and pressed, the sheet-like thermoplastic synthetic resin material having a thickness of about 2 mm in the sixth layer 6 melts and passes through the gaps in the mesh-like mesh of the seventh layer 7. After the heat-sealing and pressing process and forming, the passed thermoplastic synthetic resin material forms the anti-slip portion at the bottom. That is, the arrangement of the sixth layer 6 and the seventh layer 7 may be reversed. As described above, after the members of each layer in the shape of a rectangular sheet are stacked in seven layers in the above order, they are heat-sealed and pressed.

[0028] Then, each layer is adhered by heat-sealing, the arrangement of the sixth layer 6 and the seventh layer 7 is reversed, and the anti-slip portion at the bottom is formed by the thermoplastic synthetic resin material that is a member of the sixth layer 6. This can also be said to be an effect of the floor board 10 of the present invention.

Explanation of Reference Numerals

[0029] 1 First layer 2 Layer 2 3 Layer 3 4 Layer 4 5 Layer 5 6 Layer 6 7 Layer 7 8 Protrusion 9 Mountain-shaped of the protrusion 10 Floor board

Claims

1. Each layer is in the form of a sheet. The first layer, which is the topmost layer, is composed of a heat-insulating sheet obtained by coating a synthetic resin mesh sheet with a metal thin film. The second layer is composed of a synthetic resin sheet material. The layers are stacked, and by means of a hot welding press process using an upper mold having through-holes, the synthetic resin sheet material of the second layer melts out onto the surface of the first layer, eliminating the metallic color of the first layer. At the locations of the through-holes on the surface of the first layer, projections in the shape of through-holes are formed. On the surface of the projections in the shape of through-holes, the synthetic resin sheet material of the second layer melts and spherical projections protruding from the mesh openings of the first layer are formed. A floorboard characterized by the above.

2. Each layer is in the form of a sheet. The first layer, which is the topmost layer, is composed of a heat-insulating sheet obtained by coating a synthetic resin mesh sheet with a metal thin film. The second layer is composed of a synthetic resin sheet material. The third layer is a synthetic resin reinforced fiber mesh member. The fourth layer is a soft synthetic resin member formed in a plate shape. The fifth layer is a thermoplastic synthetic resin material in the form of a sheet. The sixth layer is a synthetic resin reinforced fiber mesh member similar to the third layer. The seventh layer, which is the bottommost layer, is composed of a hard polyethylene in the form of a sheet with gaps in a mesh shape. The layers are stacked in order from the seventh layer with the sixth layer on top up to the first layer. By means of a hot welding press process, the sixth layer passes through the gaps of the seventh layer to form a displacement prevention portion at the lowermost surface. By means of a hot welding press process using an upper mold having through-holes, the synthetic resin sheet material of the second layer melts out onto the surface of the first layer, eliminating the metallic color of the first layer. At the locations of the through-holes on the surface of the first layer, projections in the shape of through-holes are formed. On the surface of the projections in the shape of through-holes, the synthetic resin sheet material of the second layer melts and spherical projections protruding from the mesh openings of the first layer are formed. The warping due to heat insulation is prevented in the first layer, and the expansion and contraction of the resin are suppressed by the tensile strength of the synthetic resin reinforced fiber mesh members constituting the third layer and the sixth layer to prevent warping. A floorboard characterized by the above.

3. The projections in the shape of through-holes and the spherical projections serve as anti-slip materials when walking on the floorboard. A floorboard according to Claim 1 or Claim 2, characterized by the above.

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