JP3675928B2 - Cover - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cover for covering a water treatment tank such as a septic tank and an opening of a water passage such as a U-shaped groove.
[0002]
[Prior art]
This type of cover is made by laminating a surface material on a panel-shaped cover main body, applying an end face treatment, or attaching a handle. For example, as shown in FIG. 9, such a cover A is horizontally mounted on the left and right lid receiving portions 110, 110 provided in the opening 100 such as a water treatment tank or a U-shaped groove, and is attached to the opening 100. To cover the opening 100. Further, the opening 100 is opened by removing the cover A from the lid receiving portions 110 and 110.
[0003]
In general, the cover lid A is required to have a bending strength that can withstand the walking of a person on the cover A. Moreover, in the case of a cover for covering an opening having a large opening area, such as a water treatment tank such as a septic tank, a property of floating even if it is dropped into water is required. In addition, when the cover A is placed side by side and installed in the opening, odors are prevented from leaking from the gaps between the adjacent covers, and rainwater and dust are prevented from entering the water treatment tank and the like from the gaps. This is also beneficial, and it is desirable that the cover A be as light as possible in consideration of the labor when opening and closing the cover A and the labor during transportation.
[0004]
Therefore, conventionally, as shown in FIG. 10, a fiber reinforced plate in which a fiber reinforced synthetic resin foam reinforced by mixing glass fibers is used as a core material 51, and both front and back surfaces of the core material 51 are reinforced with glass fibers. A panel-shaped cover main body A1 having a structure in which the outer surface materials 52, 52 are overlapped is used.
[0005]
[Problems to be solved by the invention]
In the conventional cover A, the necessary bending strength is ensured by using a fiber reinforced synthetic resin foam for the core material 51 of the cover main body A1, but when the cover A is arranged side by side, it is adjacent to each other. There is room for improvement in terms of preventing odor leakage from the gaps between the covers A and the ingress of dust into water treatment tanks, etc., and there is still room for improvement in terms of weight reduction. there were.
[0006]
The present invention has been made in view of the above circumstances, and it is possible to sufficiently achieve the required strength by devising the core material of the cover main body, as well as the light weight and the property of floating in water. An object of the present invention is to provide a cover that can be improved as compared with the conventional one.
[0007]
In addition, the present invention can effectively prevent leakage of odors from the gaps between adjacent cover covers and rainwater and dust entering the water treatment tank when the cover covers are arranged side by side. The object is to provide a cover.
[0008]
[Means for solving the problems]
The cover according to the present invention is a cover that is attached to and detached from an opening such as a water treatment tank or a U-shaped groove, and includes a rib portion and flat plate portions that are integrally provided on both upper and lower ends of the rib portion. A core material in which a synthetic resin independent foam molded body is fitted between upper and lower flat plate portions in an H-shaped material made of synthetic resin, and an outer surface material made of synthetic resin superimposed on both front and back surfaces of the H-shaped material To form a panel-shaped cover main body, the H-shaped material and the independent foam molded body are joined together, and the H-shaped material and the outer surface material are joined together, and the upper flat plate portions and the lower flat plate are joined together. It is said that a common independent foamed molded product is disposed across the H-shaped members arranged side by side with the parts being faced to each other.
[0009]
With the above configuration, the rib portion of the H-shaped material exerts a function as a reinforcing rib that enhances the bending strength of the panel-shaped cover body, so that in the extending direction of each portion in the direction in which the rib portion extends. The bending strength in the intersecting direction is enhanced by the action of the rib portion as a reinforcing rib. Such a bending strength is further enhanced by fitting an independent foam molded body made of synthetic resin between the upper and lower flat plate portions of the H-shaped material. Therefore, when the cover body is formed in a rectangular shape in plan view, and the longitudinal direction of such a cover body matches the extending direction of the rib portion of the H-shaped material, there is a great resistance at each part in the longitudinal direction of the cover body. Deflection strength is exhibited. Moreover, also in the direction orthogonal to the extending direction of the rib part in the H-shaped material, a large bending strength is exhibited by the H-shaped material and the independent foamed molded body being joined to each other.
[0010]
On the other hand, the core material is formed of a synthetic resin H-shaped material, a synthetic resin independent foam molded body fitted between the upper and lower flat plate portions of the H-shaped material, and a synthetic resin outer surface material. Therefore, the porosity is large for the apparent volume of the core material, and water does not penetrate into the closed foam molded body, so that it is easy to achieve weight reduction and float on water. Here, in order to further increase the flexural strength, reinforcing fibers such as glass fibers may be mixed in the closed foam molded body, the H-shaped material, the outer surface material, etc. In order to reduce the weight, it is preferable not to mix glass fibers.
[0011]
Extruded molded products can be used for the above-mentioned closed-cell molded products, so that the production cost can be kept low, and through-holes extending over the entire length of the closed-cell molded products are formed. In this case, weight reduction is further promoted without impairing the bending strength. It is most desirable that the corrugated plate material, the independent foamed molded product, and the outer surface material are made of the same type of synthetic resin. Examples of synthetic resins that can be used in these moldings include polystyrene, polyurethane, polyethylene, hard vinyl chloride, unsaturated polyester, phenol, and the like, and fiber reinforced resins in which reinforced fibers are mixed into synthetic resins selected from them. It is also preferable to use a corrugated plate material, an independent foam molded body, or an outer surface material.
[0012]
In the cover according to the present invention, the outer peripheral end surface of the core material is covered with an edge frame, and a protruding piece inclined forward is provided on the edge frame of one of the pair of opposite sides of the core material. In addition, a protruding piece inclined upward is provided on the edge frame of the other side, and the above-mentioned inclined inclination of the edge of one edge frame when two different cover lids are arranged adjacent to each other. It may be configured such that the protruding piece and the protruding piece that is inclined upwardly from the other edge frame overlap each other.
[0013]
With this configuration, when the cover is arranged side by side, the gap between the cover bodies is closed by the overlapping of the protruding pieces, and dust and rainwater enter the water treatment tank and the like from the gap. It is prevented.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a partial cross-sectional view of a panel-shaped cover main body 1 used for a cover according to the present invention, and FIG. 2 is an enlarged cross-sectional view of a main part of the cover main body 1.
[0015]
The cover body 1 is formed in a rectangular shape in plan view by a core material 2 and synthetic resin outer surface materials 3 and 4 superimposed on both front and back surfaces of the core material 2, and the core material 2 is independently foamed with the H-shaped material 21. It is comprised by the molded object 25. FIG. The H-shaped member 21 is an integrally molded body made of a synthetic resin having a narrow strip-shaped rib portion 22 and flange-shaped flat plate portions 23, 23 provided integrally at both upper and lower end portions of the rib portion 22. . The independent foam molded body 25 is a flat plate-like body, and the shape thereof is such that the upper flat plate portions 23 and 23 and the lower flat plate portions 23 and 23 of the two H-shaped members 21 and 21 face each other. When these H-shaped members 21 and 21 are arranged side by side, the shape is the same as the space shape surrounded by the upper and lower flat plate portions 23 and the left and right rib portions 22 and 22. In each of the spaces formed between the ribs 22 in the plurality of H-shaped members 2 that are arranged side by side with the upper flat plate portions 23... And the lower flat plate portions 23. One independent foam molding 25 is fitted. Therefore, between the two H-shaped members 21 and 21 arranged adjacent to each other, a common independent foamed molded body 25 is disposed across them.
[0016]
As shown in FIG. 2, the H-shaped material 21 forming the core material 2 and the independent foam molded body 25 are integrally joined by the bonding agent 5, and both the H-shaped material 21 and the outer surface materials 3 and 4 are joined together. Similarly, they are integrally bonded by the bonding agent 5.
[0017]
The above-mentioned H plate material 21 is obtained by cutting a long extruded product having a predetermined width made by a technique such as extrusion molding or pultrusion molding of a synthetic resin or fiber reinforced resin into a predetermined length and width, and is an independent foam molding. The body 25 is obtained by cutting a long extruded product obtained by extruding foam synthetic resin or fiber reinforced foam synthetic resin into a predetermined length. Polystyrene, polyurethane, polyethylene, hard vinyl chloride, unsaturated polyester, phenol, and the like can be used for the closed foam molded body 25, the outer surface materials 3 and 4, and the H-shaped material 21, and a reinforced fiber as a synthetic resin selected from them. It is also preferable to use a fiber reinforced resin mixed with a H-shaped material, a closed foam molded body, or an outer surface material.
[0018]
The cover body 1 described above has a rectangular shape in plan view, and is a schematic plan view showing the use state of the cover A. The longitudinal direction L of the cover body 1 and the extension of the rib portion 22 of the H-shaped member 21 shown in FIG. The direction is the same.
[0019]
FIG. 3 shows a structure in which the edge frame 6 is attached to the end face cut of the core material 2. FIG. 4 shows the edge frame 6. As shown in FIG. 4, the edge frame 6 is formed by projecting a pair of upper and lower insertion pieces 62, 62 on the back surface side of a strip-like end plate 61, and extrusion molding of ABS resin or polyvinyl chloride resin. Made of goods. As shown in FIG. 3, this edge frame 6 strikes a pair of insertion piece parts 62, 62 between the independent foam molded body 25 of the core material 2 and the upper and lower flat plate parts 23, 23 of the H-shaped material 21. Is fixed to the peripheral edge of the core material 2. In the edge frame 6 shown in FIG. 4, recessed portions 63 and 63 are provided in the insertion piece portions 62 and 62. When the edge frame 6 is fixed to the end face cut of the core member 2 as described above, the notch portions 63 and 63 are fitted into the rib portions 22 where the rib portions 22 of the H-shaped member 21 exist. It is something to be included. Therefore, the edge frame 6 having the cut-out portions 63 and 63 is suitable for fixing to the end face cut of the core member 2 located at the end portion in the longitudinal direction of the H-shaped member 21 (that is, the extending direction of the rib portion 22). . Also, as shown in FIG. 4, when the insertion piece portion 62 is provided with a serrated engagement portion 64, the insertion piece portion 62 is made of the independent foam molded body 25 of the core material 2 and the flat plate of the H-shaped material 21. When struck with the portion 23, the engaging portion 64 helps to prevent the insertion piece portion 62 from being pulled out.
[0020]
FIG. 6 shows a modified example in which the edge frame 6 is fixed to the end face cut of the core member 2. The edge frame 6 is also an extrusion-molded product, and a pair of insertion piece portions 62 and 62 are driven between the independent foamed molded body 25 and the upper and lower flat plate portions 23 and 23 of the H-shaped member 21 to thereby form the core material 2. It is fixed to the periphery. Further, while the end plate 61 of the edge frame 6 joined to the edge on one side of the core material 2 is provided with a protruding portion 65 inclined downward, it is coupled to the other edge of the core material 2. The end plate 61 of the edge frame 6 is provided with a protruding portion 66 inclined upward. In this way, when the two cover lids A are arranged side by side, the protrusions 65 and 66 overlap with each other in the vertical direction so as to close the gap between the cover lid main bodies 1 and 1. It is possible to prevent odors from leaking and rainwater and dust from entering the tank. As shown in FIG. 6, a packing 67 such as a neoprene foam packing is provided over the entire length of the upper surface of the downwardly projecting portion 65 as shown in FIG. It is made more prominent by overlapping in the direction. Even if the packing 67 is provided on the lower surface of the protruding portion 66, the same effect is exhibited.
[0021]
Although the independent foam molded body 25 used in the cover body 1 of the cover A described above has a solid structure, for example, as in the case of the cover body 1 shown in FIG. By forming the through-hole 26 over the entire length of the body 25, the closed foam molded body 25 may have a hollow structure, and by doing so, weight reduction is further promoted. In addition, you may mix the independent foaming molding 25 which has the through-hole 26, and the solid independent foaming molding 25 which does not have a through-hole. Furthermore, when providing the through-hole 26 in the independent foaming molding 25, the number of the through-holes 26 may be one. In FIG. 5, other configurations and operations are the same as those described in FIG.
[0022]
The cover A of each embodiment described above can be made, for example, by the following procedure. That is, the H-shaped member 21, the independent foam molded body 25, or the outer surface materials 3, 4 used for the core material 2 are manufactured in advance using a known method such as an extrusion molding method, an injection molding method, or a pultrusion molding method. Keep it. Then, uncured curable synthetic resin is applied as the bonding agent 5 to the inner surfaces of the flat plate portions 23 and 23 of the H-shaped member 21 and the surface of the rib portion 22, and between the flat plate portions 23 and 23 of the H-shaped member 21. The half width part of the independent foaming molding 25 is inserted. In this way, the remaining half-width portion of the independent foamed molded body 25 protrudes between the flat plate portions 23, 23, so that the upper and lower flat plate portions 23, 23 of the other H-shaped member 21 are fitted into the protruding portion. By doing so, the upper and lower flat plate portions 23 and 23 of the H-shaped member 21 are brought into contact with the upper and lower flat plate portions 23 and 23 of the H-shaped member 21 adjacent thereto. This operation is repeated one after another to form the core material 2 having a predetermined size. After that, the outer surface materials 3 and 4 are overlapped on the upper and lower surfaces of the core material 2 via the adhesive material 5 made of the curable synthetic resin, and the core material 2 is pressed and heated to a predetermined temperature in such a pressed state. Then, the bonding agent 5 is cured, and the H-shaped member 21 and the independent foamed molded body 25, and the H-shaped member 21 and the outer surface materials 3 and 4 are firmly bonded to each other by the bonding agent 5, and the cover body 1 is manufactured.
[0023]
Thereafter, the cover A is manufactured by joining the edge frame 6 described in FIG. 3, FIG. 4 and FIG. 6 or attaching a handle. FIG. 8 is a plan view of the cover A in which the surface material 7 having an uneven pattern is laminated and integrated on the surface of the cover main body 1. In FIG. 8, 8 is a handle.
[0024]
【The invention's effect】
The cover according to the present invention has the advantage that it is easy to achieve weight reduction and the property of floating in water is also exhibited well in spite of being inferior to the conventional cover in strength such as flexural strength. is there. In addition, when the cover is arranged side by side as if the water treatment tank is covered with a large number of covers, rainwater or dust enters the tank or the odor leaks from the gap between the adjacent covers. There is an advantage that can also be prevented.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view of a panel-shaped cover body used for a cover according to the present invention.
FIG. 2 is an enlarged cross-sectional view of a main part of a cover body in which surface materials are laminated and integrated.
FIG. 3 is a partial cross-sectional view of a core member to which an edge frame is attached.
FIG. 4 is a perspective sectional view showing an example of an edge frame.
FIG. 5 is a partial cross-sectional view of a cover body according to another embodiment.
FIG. 6 is a partial cross-sectional view of a core member to which an edge frame according to a modification is attached.
FIG. 7 is a schematic plan view of a state where an opening is covered with a cover main body.
FIG. 8 is a plan view of a cover.
FIG. 9 is a schematic cross-sectional view of a state where an opening is covered with a cover.
FIG. 10 is a partial cross-sectional view of a conventional cover.
[Explanation of symbols]
A Cover 1 Cover body 2 Core materials 3 and 4 Outer material 6 Edge frame 21 H-shaped material 22 Rib portion 23 Flat plate portion 25 Independent foam molded body 26 Through hole 65 Projection piece 66 Projection piece 100 Opening

Claims (3)

H-shaped material made of synthetic resin, which is a cover that can be attached to and detached from openings such as water treatment tanks and U-shaped grooves, and has a rib portion and flat plate portions integrally provided at both upper and lower ends of the rib portion. A panel-shaped cover body by a core material in which a synthetic resin independent foam molded body is fitted between upper and lower flat plate portions and a synthetic resin outer surface material superimposed on both front and back surfaces of the H-shaped material The H-shaped material and the independent foam molded body are joined together, and the H-shaped material and the outer surface material are joined together, and the upper flat plate portions and the lower flat plate portions are butted sideways. A covering lid, wherein a common closed-cell molded article is disposed between the H-shaped members arranged.   The cover according to claim 1, wherein the closed foam molded body has a through-hole extending over its entire length.   The outer peripheral end surface of the core material is covered with an edge frame, and a protruding piece inclined forward is provided on the edge frame of one side of the pair of opposite sides of the core material, and the other Protruding pieces inclined upwards are provided on the edge frame of the side part, and when the two different cover bodies are arranged adjacent to each other, the protruding piece and the other edge inclined forwardly downward of one edge frame The cover according to claim 1 or 2, wherein the projecting pieces inclined upward from the frame overlap each other.

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