JP2000054478A - Cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light cover capable of reducing labor required to open/ close the cover, having large flexural strength allowing no bending by the walk of persons, easily cut and mass-produced at a low cost. SOLUTION: The periphery of a foam resin bar 1 of 0.2-0.5 in specific gravity having square cross section is covered with a covering layer 2 with resin impregnated in glass roving and hardened, to form core material 3. A plurality of core material 3, 3 are arranged sideways and bonded to each other, and fiber reinforced resin plates 4a, 4b placed over the upper and lower sides are bonded to form a panel 10 forming a cover. A cover can also be formed of a panel formed by arranging foam resin bars and longitudinal synthetic resin rib members alternately sideways to bond them and placing the fiber reinforced resin plates 4a, 4b over the upper and lower sides to bond them, or a panel formed by arranging the foam resin bars 1 sideways with spaces, placing fiber reinforced plates with protruding ribs on one side, over the upper and lower sides to insert the protruding ribs in the mutual spaces of the foam resin bars, and bonding them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cover for covering an opening of a water treatment tank such as a septic tank.

[0002]

2. Description of the Related Art A cover of this type is required to have a strength (bending resistance) that can withstand walking by a person on the cover and a property that the cover floats when dropped in water. In addition, considering the labor and the like when opening and closing the cover, it is desirable that the cover is as light as possible.

In order to satisfy such a demand, a cover having a handle (not shown) provided on a panel 100 having a three-layer structure as shown in FIG. 8 is conventionally used. The panel 100 constituting the cover is formed by sandwiching a mat of glass fiber 102 impregnated with a curable resin between the upper and lower FRP plates 101, 101, and foaming and curing the resin.
A core plate 103 made of a foamed resin containing a large amount of glass fiber 102 is formed between the core material 01 and 101.

[0004]

However, the above-mentioned cover has a problem that it is difficult to uniformly foam the core plate 103 of the panel 100, and there is a problem that the bubble size and the expansion ratio are varied, and such a problem is caused by the panel. This was particularly noticeable when the area of 100 was large.

In the panel 100, although the weight of the core plate 103 is reduced by foaming of the resin,
Since the core plate 103 contains a large amount of heavy glass fiber 102, the specific gravity of the entire panel 100 is only slightly smaller than 1, and the panel 100 floats on water but cannot be said to be lightweight. There is a problem that considerable labor is required when opening / closing or transporting the device.

Moreover, a large amount of glass fiber 1
When 01 is included, there is a problem that cutting and cutting of the end portion of the panel 100 are difficult, and there is a problem that end face treatment is also required.

[0007] Further, when the above-mentioned lids are arranged side by side to cover the opening of the water treatment tank, there is a problem that odor leaks from a gap between the lids and dust infiltrates into the water treatment tank.

The present invention has been made in view of the above problems, and has as its object the purpose of the present invention is to provide a cover having a large strength panel, a uniform foamed core material, and a conventional panel having a specific gravity. It is an object of the present invention to provide a cover that can be cut and cut easily and can be mass-produced inexpensively, because it is small and light in weight, which is about half of that of the above.

Another object of the present invention is to provide a cover in which odor does not leak from a gap between the covers and dust does not enter.

[0010]

In order to achieve the above object, a cover according to claim 1 of the present invention comprises a glass roving around a foamed resin rod having a rectangular cross section and a specific gravity of 0.2 to 0.5. A resin is impregnated and cured with a coating layer to form a core material, and a plurality of the core materials are arranged side by side and adhered to each other, and a fiber reinforced resin plate overlaid on top and bottom of these core materials is adhered. It is characterized by comprising a panel formed in this way.

[0011] The cover made of the panel having such a structure has a uniform foaming state because the core foamed resin rod does not contain glass fiber, and furthermore, the foamed resin is impregnated with the resin in the glass roving and cured. Since the rod is covered and reinforced, the strength of the core is high. Therefore, since the cover made of the panel using the core material has high mechanical strength, particularly high bending resistance, even if a person walks on the cover, the cover does not bend due to the load.

[0012] Further, the cover comprising the panel having the above structure,
The upper and lower fiber reinforced resin plates and the core layer only include glass fibers or glass rovings in the coating layer, and the core resin foam resin rod does not include glass fibers, and its specific gravity is as small as 0.2 to 0.5. Therefore, the specific gravity of the entire panel is about half of that of the conventional panel, and since the panel is lightweight, the labor required for opening and closing is greatly reduced. If the glass fiber is not contained in the foamed resin rod of the core material as described above, cutting and cutting work can be easily performed, and the end face treatment can be omitted.

Next, the cover according to the second aspect of the present invention is such that a foamed resin rod having a square cross section and a specific gravity of 0.2 to 0.5 and a vertical rib material of a synthetic resin are alternately arranged side by side and adhered to each other. It is characterized by comprising a panel formed by bonding these foamed resin rods and a fiber reinforced resin plate which is vertically stacked on a vertical rib material.

The cover made of the panel having such a configuration also has a fiber-reinforced resin plate containing only glass fibers and the like, the foamed resin rod does not contain glass fibers at all, and has a specific gravity of 0.2 to 0. Since it is as small as 0.5, it is lightweight and the labor required for opening and closing is greatly reduced, cutting and cutting are easy, and end face treatment is not required. Since the vertical ribs, which are alternately arranged side by side with the foamed resin rod and adhered thereto, improve the bending resistance of the panel, the panel does not bend even when a load such as a pedestrian is applied.

In the cover according to the third aspect, foamed resin rods having a rectangular cross section and a specific gravity of 0.2 to 0.5 are arranged side by side with a gap therebetween, and a plurality of convex ribs are fixed on one side. The fiber-reinforced resin plates formed in parallel at intervals are placed on top and bottom of the foamed resin rod, and the convex ribs are inserted into the gaps between the foamed resin rods. It is characterized by comprising a panel formed by bonding.

A cover made of a panel having such a configuration also has a fiber-reinforced resin plate containing only glass fibers and the like, and a foamed resin rod contains no glass fibers at all, and has a specific gravity of 0.2 to 0. Since it is as small as 0.5, it is lightweight and the labor required for opening and closing is greatly reduced, cutting and cutting are easy, and end face treatment is not required. Further, since the bending resistance of the panel is improved by the convex ribs formed on the upper and lower fiber reinforced resin plates, the cover does not bend due to the load of the pedestrian or the like.

Next, a cover according to a fourth aspect is the cover according to any one of the first to third aspects, wherein the foamed resin rod is a foamed polystyrene rod.

Such a foamed polystyrene rod can be reclaimed at a low cost by using, for example, punched waste of a foamed polystyrene container for an instant food. In addition, the cover can be mass-produced at a low cost by reducing the manufacturing cost. Further, since the expanded polystyrene rod has good adhesiveness, it can be firmly bonded to the upper and lower fiber reinforced resin plates and the like.

Next, a cover according to a fifth aspect of the present invention is the cover according to any one of the first to fourth aspects, wherein a step portion having a smooth substantially S-shaped curved surface is formed at one end in the width direction of the panel. The present invention is characterized in that a superposed step portion having a smooth substantially S-shaped curved surface superposed on the step receiving portion via a packing is formed at the other end in the width direction of the panel.

When the receiving step and the overlapping step are formed at both ends in the width direction of the panel as described above, when the lids made of the panel are arranged side by side to cover the opening of the processing tank, the receiving end of one side thereof is received. By stacking the overlapped step on the other end of the adjacent cover via the packing via the packing, it is possible to eliminate the gap between the cover and prevent leakage of odor and intrusion of dust. In addition, since both the receiving step and the overlapping step are formed in a smooth substantially S-shaped curved surface, it is possible to prevent cracks and the like from being generated in the angular portion as in the case of forming a step with an angular bent surface. It can also be prevented.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of the cover according to the first invention, FIG. 2 is a cross-sectional view of the cover, FIG. 3 is a cross-sectional view showing a connection state of the cover, and FIG. FIG.

As shown in FIG. 1 and FIG. 2, this cover is formed by covering the periphery of a foamed resin rod 1 having a rectangular cross section with a covering layer 2 to form a core material 3, and a plurality of the core materials 3 are provided horizontally. The panel 10 is formed by arranging and adhering to each other with an adhesive (not shown), and bonding the fiber reinforced resin plates 4a and 4b, which are superimposed on the core material 3 with an adhesive (not shown). There are handles 5, 5 near both ends in the longitudinal direction.

The foamed resin rod 1 is made by uniformly foaming and extruding polystyrene or other synthetic resin at a foaming ratio of about 2 to 5 times, and has a small specific gravity of 0.2 to 0.5 and a light weight. It is a foam molded article with high rigidity. In particular, foamed polystyrene rods reclaimed using punched waste from foamed polystyrene containers for instant foods can be reclaimed at low cost, and the specific gravity of the resin itself is small and lightweight.
In addition, since it has good adhesion to a resin such as polyester contained in the coating layer 2, it is very suitably used as the foamed resin rod 1.

The cross-sectional shape of the foamed resin rod 1 may be square or rectangular as long as it is rectangular as described above, but the vertical dimension of the rectangular cross section is desirably about 1.5 to 4 cm.
When the foamed resin rod 1 having a vertical dimension of less than 1.5 cm is used, it is difficult to obtain a panel 10 having a large bending resistance because the strength against a load from above is insufficient. If a large foamed resin rod 1 is used, the thickness and weight of the panel 10 increase, and the flexural strength increases more than necessary.
In addition, the lateral dimension may be any, but considering the workability of coating the coating layer 2, about 2 to 5 cm is appropriate.

The coating layer 2 covering the periphery of the foamed resin rod 1 is a layer obtained by impregnating and curing a glass roving with a curable resin such as polyester, and further increases the rigidity of the foamed resin rod 1 to improve its strength. For the purpose of coating.
The thickness of the coating layer 2 is suitably about 1.5 to 3 mm,
When the thickness is less than 1.5 mm, the rigidity and strength are not sufficiently improved. On the other hand, if the thickness is more than 3 mm, the rigidity and strength become unnecessarily large, and the weight of the core material 3 increases, making it difficult to form a lightweight panel 10. Such a coating layer 2 can be efficiently and continuously coated around the foamed resin rod 1 by pultrusion of a glass roving impregnated with a resin.

As described above, a plurality of high-strength core members 3 in which the periphery of the foamed resin rod 1 is covered with the covering layer 2 are arranged side by side and adhered to each other with an adhesive. As the adhesive, a polyester-based, polyurethane-based, or epoxy-based adhesive having excellent adhesion to the coating layer 2 and the upper and lower fiber reinforced resin plates 4 is preferably used.

The fiber reinforced resin plates 4a and 4b adhered to the upper and lower portions of the core material 3 are so-called FRP plates in which glass fibers are contained in a curable resin such as polyester, and the surface thereof is a gel coat resin. Is applied. On the surface of the upper fiber reinforced resin plate 4a, countless small anti-slip projections 4c are formed. For bonding these fiber reinforced resin plates 4a and 4b, the same adhesives of polyester type, polyurethane type and epoxy type as described above are used.

Further, as shown in FIG.
Is formed at one end in the width direction of the panel 10 with a smooth substantially S-shaped curved surface. Correspondingly, the other end of the panel 10 in the width direction is provided with a smooth stepped portion 6a overlapping the step 6a. An overlapping step portion 6b having a substantially S-shaped curved surface is formed. The receiving step portion 6a and the overlapping step portion 6b may be formed in an angularly bent surface. However, if such a stepped shape of the bent surface is formed, a crack or the like is likely to be formed in the angular portion. It is desirable to form such a smooth substantially S-shaped curved surface.

The cover A composed of the panel 10 having the above-described structure is arranged side by side in the opening 7a of the processing tank 7 as shown in FIG. 4, and at this time, as shown in FIG. The overlapping step portion 6b of the panel 10 of the adjacent cover lid is stacked on the step receiving portion 6a with the packing 8 interposed therebetween. As described above, when the cover lid is arranged side by side while the receiving step portion 6a and the overlapping step portion 6b are overlapped via the packing 8, and the opening 7a of the processing tank 7 is covered,
Since the gap between the lids is closed by the packing 8, leakage of odor from the processing tank 7 and intrusion of dust into the processing tank 7 can be prevented.

The above-mentioned cover is made of a foamed resin rod 1 by a coating layer 2 obtained by impregnating and curing a glass roving with a resin.
Since the core material 3 coated and reinforced has high strength, the panel 10 has excellent rigidity and mechanical strength, particularly excellent bending resistance. Therefore, even if a person walks on the panel 10, there is no concern that the panel 10 will bend due to its weight, and even if a temperature difference occurs between the front and back surfaces of the panel 10 due to the radiant heat of direct sunlight, There is no worry about warping. Moreover, in the above cover, the glass fiber is not contained in the foamed resin rod 1 at all, and its specific gravity is as small as 0.2 to 0.5, so that the specific gravity of the panel 10 is about half that of the conventional product. Since it is lightweight as described above, labor required for opening and closing can be greatly reduced. Furthermore, if the glass fiber is not included in the foamed resin rod 1, the receiving step 6a and the overlapping step 6b
Can be easily formed by cutting, and the processing of the cut surface can be omitted.

FIG. 5 is a cross-sectional view of a cover according to the second invention. This cover has a rectangular cross-section and has a specific gravity of 0.2 to 0.5 and a vertical length of synthetic resin. Rib material 9
Are alternately arranged side by side and adhered to each other with the above-mentioned adhesive, and the above-mentioned fiber-reinforced resin plates 4a and 4b which are superimposed on the foamed resin rod 1 and the vertical rib material 9 are adhered with the above-mentioned adhesive. It is composed of a panel 20 formed in this way.

At the both ends in the width direction of the panel 20, the above-described stepped portion 6a and the overlapping stepped portion 6b having a substantially S-shaped curved surface are formed, and the above-mentioned packing is provided between these stepped portions. By sandwiching 8, the leakage of odor from the processing tank and the intrusion of dust into the processing tank can be prevented. The above-mentioned handle (not shown) is provided on a surface near both ends in the longitudinal direction of the panel 20 so as to be easily opened and closed.

The cover made of the panel 20 having such a configuration also has the fiber-reinforced resin plate 4a containing only glass fibers, and the foamed resin rod 1 does not contain glass fibers at all.
Since its specific gravity is as small as 0.2 to 0.5, it is light in weight and the labor required for opening and closing can be greatly reduced.
Also, the cutting process of the overlapping step portion 6b can be easily performed.
Since the vertical rib members 9 alternately and laterally bonded to the foamed resin rod 1 greatly improve the bending resistance of the panel 20, there is no fear that the panel 20 will bend even when a load such as a pedestrian is applied. In addition, there is no fear that warpage occurs even if a temperature difference occurs between the front surface and the back surface of the panel 20.

FIGS. 6 and 7 are sectional views showing different embodiments of the cover according to the third invention.

That is, the cover of the embodiment shown in FIG. 6 has the above-described foamed resin rods 1 having a rectangular cross section and a specific gravity of 0.2 to 0.5 which are arranged side by side with a gap therebetween, and a plurality of The fiber reinforced resin plates 4a, 4b formed in parallel at intervals corresponding to the width of the foamed resin rod 1 are overlapped on the upper and lower sides of the foamed resin rod 1, and the convex ribs 9a are attached to the foamed resin rod 1. And a panel 30 formed by bonding the foamed resin rod 1, the fiber reinforced resin plates 4a and 4b, and the convex rib 9a with the above-mentioned adhesive.

At the both ends in the width direction of the panel 30, the above-described smooth stepped portion 6a having a substantially S-shaped curved surface and the overlapping stepped portion 6b are formed, and the aforementioned packing is provided between these stepped portions. By sandwiching 8, the leakage of odor from the processing tank and the intrusion of dust into the processing tank can be prevented. The above-mentioned handle (not shown) is similarly provided on a surface near both ends in the longitudinal direction of the panel 30 so as to be easily opened and closed.

On the other hand, the cover of the embodiment shown in FIG.
Are formed high at an interval twice as large as the width of the foamed resin rod 1, and the convex ribs 9a of the upper resin plate 4a and the convex ribs 9b of the lower resin plate 4b are alternately formed. It differs from the cover of FIG. 6 in that it is inserted in the gap. The other configuration is the same as that of the cover of FIG.

The panels 30, 4 shown in FIGS.
Also, the cover made of No. 0 only contains glass fibers in the fiber-reinforced resin plates 4a and 4b, and the foamed resin rod 1 does not contain glass fibers at all, and its specific gravity is as small as 0.2 to 0.5. Therefore, it is lightweight and the labor required for opening and closing can be greatly reduced, and the cutting of the receiving step 6a and the overlapping step 6b can be easily performed. And the upper and lower fiber reinforced resin plates 4
Panels 30 and 40 are formed by convex ribs 9a formed on the panels 30 and 4b.
Since the flexural strength of the panel 40 is greatly improved, there is no need to worry that the panels 30 and 40 bend even when a load such as a pedestrian is applied. There is no need to worry.

[0040]

As is clear from the above description, the cover of the present invention is lightweight, can reduce the labor required for opening and closing, and has high strength, especially high bending resistance, so that a person can walk on it. Even if there is a temperature difference between the front and back surfaces, there is no need to worry about warping due to the weight of the pedestrian or warping due to the temperature difference. It can be easily formed to prevent odor leakage and dust infiltration. Particularly, when a recycled foamed polystyrene rod is used as the foamed resin rod, a remarkable effect that mass production can be performed at low cost is achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cover according to a first invention.

FIG. 2 is a sectional view of the cover.

FIG. 3 is a cross-sectional view showing a connection state of the cover.

FIG. 4 is a plan view showing a use state of the cover.

FIG. 5 is a sectional view of a cover according to the second invention.

FIG. 6 is a sectional view showing an embodiment of a cover according to the third invention.

FIG. 7 is a cross-sectional view showing another embodiment of the cover according to the third invention.

FIG. 8 is a sectional view of a conventional cover.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foam resin rod 2 Coating layer 3 Core material 4a, 4b Upper and lower fiber reinforced resin plates 5 Handle 6a Receiving step 6b Stacking step 7 Processing tank 7a Processing tank opening 8 Packing 9 Vertical rib material 9a Convex rib 10, 20 , 30,40 Panel A Cover

Continued on the front page F-term (reference) 3E070 AA13 AB08 DA08 DA09 PA09 RA02 RA30 4D027 AA12 AB12 4F100 AG00A AK01A AK12A BA03 BA06 BA10B BA10C CB02 DB10 DC24A DD04B DD04C DD32A DH01A DH01B DH01 J05L J00 GB01

Claims (5)

[Claims] 1. A glass roving is impregnated with a resin around a foamed resin rod having a square cross section and a specific gravity of 0.2 to 0.5,
A core material is formed by coating with a cured coating layer, and a plurality of the core materials are arranged side by side and adhered to each other, and a panel formed by adhering a fiber reinforced resin plate stacked above and below these core materials is formed. A lid characterized by being made of. 2. A foamed resin rod having a square cross section and a specific gravity of 0.2 to 0.5 and a synthetic resin longitudinal rib material are alternately arranged side by side and adhered to each other. A cover comprising a panel formed by bonding fiber reinforced resin plates stacked one above the other. 3. Foamed resin rods having a square cross section and a specific gravity of 0.2 to 0.5 are arranged side by side with a gap therebetween, and a plurality of convex ribs are formed in parallel on one side with a constant interval. A panel formed by laminating a fiber reinforced resin plate above and below a foamed resin rod, inserting the convex ribs into the gap between the foamed resin rods, and bonding the foamed resin rod to the fiber reinforced resin plate and the convex ribs. A lid characterized by the above. 4. The cover according to claim 1, wherein the foamed resin rod is a foamed polystyrene rod. 5. A step portion having a smooth substantially S-shaped curved surface is formed at one end in the width direction of the panel, and a superimposed step portion having a smooth substantially S-shaped curved surface superimposed on the receiving portion via a packing is formed on the panel. The cover according to any one of claims 1 to 4, wherein the cover is formed at the other end in the width direction.