JP2001149917A - Cover cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover cap which is light in weight, can be opened and closed with a little labor, floats easily in water, is high in anti-deflection strength, stable in a walk feeling and provides the necessary and sufficient strength efficiently in accordance with a size of the cover. SOLUTION: This cover cap A comprises a composite plate 10 which is formed by laminating fiber reinforced erasing plates 2, 3 integrally above and below a resin foam 1 of a high expansion ratio and is constituted in such a manner that longitudinal reinforced materials 4 which part the resin foam 1 are plurally disposed in parallel with the width direction at constant intervals between the upper and lower fiber reinforced resin plates 2, 3, the upper and lower both ends of the resin foam 1 are stuck to the upper and lower fiber reinforced resin plates and a rib body which is formed by drawing the glass roving impregnated with hardenable resin and has an I-shape cross-section or a net cylinder body which is manufactured with the glass roving impregnated with the hardenable resin and has a rectangular opening which is vertically long is used as the reinforcing material 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cover for covering an opening of a water treatment facility.

[0002]

2. Description of the Related Art A cover of this kind is required to have a bending strength capable of withstanding a person walking on the cover and a property of floating even 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.

As a cover satisfying such a demand, a cover having a three-layer structure in which a resin foam plate containing a large amount of glass fibers and having a low expansion ratio is provided between upper and lower FRP plates has been known. Although this cover has high flexural strength, the intermediate resin foam plate contains a large amount of glass fiber,
Since it is made of a 2.5 times lower foam, the total weight is 20 to 35 kg per square meter, and it is hard to say that a large opening lid is lightweight.

[0004] In order to greatly reduce the weight, the upper and lower F
It is only necessary to make the cover with a three-layer composite plate provided with a resin foam plate not containing heavy glass fiber between the RP plates, but the cover of such a composite plate increases the thickness to increase the strength, It is necessary to add a reinforcing material afterwards, it is difficult to make a large opening lid in terms of weight and cost, and the thickness of the opening lid increases to maintain the necessary strength, and the lid bottom has a convex shape It was necessary to attach and mold a reinforcing material.

[0005]

However, in the case of a cover made of the above-mentioned composite plate, if the expansion ratio of the intermediate resin foam plate is increased in order to greatly reduce the weight, the strength will be insufficient. A plate having a high expansion ratio cannot be used as a plate, and therefore, there has been a certain limit in weight reduction.

Further, since the cover made of the above-mentioned composite plate does not contain glass fibers in the intermediate resin foam plate, its strength is inferior to that of the conventional cover, and it is necessary to improve the strength. In addition, a reinforcing material must be added to the lower surface of the lid in a convex shape, and mounting and forming work is required. .

[0007] The present invention has been made in view of the above circumstances,
The objective is to provide a lid that is lightweight, requires little labor for opening and closing, floats well on water, has no convex reinforcing material on the lower surface of the lid, is flat, and has a large deflection resistance and a stable walking feeling. is there. Desirably, the present invention also aims to provide a cover in which odor does not leak from a connection portion between the covers and no dust or the like enters.

[0008]

In order to achieve the above object, a cover according to claim 1 of the present invention is composed of a composite plate in which a fiber reinforced resin plate is laminated and integrated above and below a resin foam having a high expansion ratio. A plurality of longitudinal reinforcing members for dividing the resin foam are provided in parallel at regular intervals in the width direction between upper and lower fiber reinforced resin plates, and upper and lower ends of the upper and lower fiber reinforced resin plates are provided. The reinforcing material is formed of a rib body having a cross section formed by drawing a glass roving impregnated with a curable resin and having an I-shaped cross section, and an I-shaped rib as a holding intermediate support wall of upper and lower fiber reinforced resin plates. Can freely set the interval and the number of pieces optimal for the required strength according to the size of the opening, so that the strength according to the size of the opening can be obtained without waste and there is no projection on the bottom surface of the lid. .

In such a cover, since the resin foam in the middle of the composite plate is a foam having a high expansion ratio, it is lightweight, requires little labor for opening and closing, and floats well even when dropped in water and does not sink. And, between the upper and lower fiber reinforced resin plates, as a longitudinal reinforcing material, a plurality of I-shaped ribs are provided in parallel at regular intervals in parallel with each other by drawing and forming a glass roving impregnated with a curable resin, Since the rib body has high rigidity and exhibits an excellent reinforcing effect, this cover has high strength, particularly high flexural strength. Therefore, even when a person walks on the cover, the cover hardly bends as a whole, and the upper fiber reinforced resin plate is supported by the resin foam, so that the rib body between the rib body and the rib body during walking. Because it does not bend in small, walking feeling is stable.

[0010] As the rib body, the ratio of the glass roving occupying 50 to 8 as used in the cover of claim 3 is provided.
A 0% by weight rib body is preferably used. A rib body in which the proportion of glass rovings is less than 50% by weight has a little insufficient rigidity, and a rib body exceeding 80% by weight is not preferable because it becomes brittle.

Next, a cover according to a second aspect of the present invention is a cover made of a composite plate in which a fiber reinforced resin plate is laminated and integrated above and below a resin foam having a high expansion ratio. A plurality of longitudinal reinforcing members for dividing the resin foam are provided in parallel with each other at regular intervals in the width direction between the resin plates, and upper and lower ends thereof are bonded to the upper and lower fiber reinforced resin plates. Is characterized by comprising a mesh cylinder having a vertically long rectangular opening made of glass roving impregnated with a curable resin.

Since the resin foam in the middle of the composite plate is a foam having a high expansion ratio, this cover is also lightweight, requires less labor for opening and closing, and floats well even when dropped in water and does not sink. The reinforcing member provided between the upper and lower fiber reinforced resin plates is a highly rigid mesh tubular body made of glass roving impregnated with a curable resin, and exhibits an excellent reinforcing effect. Also, the strength, especially the deflection resistance is large, and the walking feeling is stable.

The cover according to claim 4 of the present invention is the cover according to claim 1 or 2, wherein the resin foam of the composite plate is a foam having an expansion ratio of about 40 to 120 times. It is characterized by the following.

Assuming that the specific gravity of the resin foam is about 1, such a resin foam has a very low specific gravity of about 0.025 to about 0.008, so that the specific gravity of the entire composite plate is considerable. The size of the cover can be reduced, and the lid can be significantly reduced in weight.

Next, a cover according to a fifth aspect of the present invention is the cover according to the first or second aspect, wherein the hard resin foam having a low expansion ratio is formed along the both sides in the width direction of the composite plate. A step portion is provided between the reinforced resin plates, and a step portion is formed on one side of the hard resin foam, and an overlapping step portion is formed on the opposite side of the hard resin foam via a packing on the step portion. It is characterized by the following.

When the hard resin foam is provided along both sides in the width direction of the composite plate as in the case of the cover and the receiving step and the overlapping step are formed, the cover is arranged and the opening of the water treatment tank is arranged. When covering, by stacking the overlapping step on the opposite side of the adjacent cover lid via packing on the step on one side,
By eliminating the gap between the lids, it is possible to prevent leakage of odor and entry of dust and the like.

[0017]

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 a cover according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the cover, FIG. 3 is a partially enlarged cross-sectional view of the cover, and FIG. FIG. 5 and FIG. 5 are plan views showing the use state of the cover.

This cover A is, as shown in FIGS.
Fiber reinforced resin plates 2 above and below resin foam 1 having high expansion ratio
Numeral 3 is a cover made of a composite plate 10 laminated and integrated, and a longitudinal reinforcing material 4 for dividing the resin foam 1 is provided between the upper and lower fiber reinforced resin plates 2 and 3 at a constant interval in the width direction. The upper and lower ends are adhered to the upper and lower fiber reinforced resin plates 2 and 3 by an adhesive 5.

Then, the composite plate 10 constituting the cover A is formed.
Handles 6 and 6 are provided on the surfaces near both ends in the longitudinal direction of the composite board 10, and hard resin foams 7 and 8 having a low expansion ratio are provided along the both sides in the width direction of the composite board 10 with the upper and lower fiber reinforced resin boards. It is provided between 2 and 3.

The resin foam 1 of the composite plate 10 constituting the cover A is made of polystyrene, polypropylene, polyvinyl chloride having a high expansion ratio of 40 to 120 times.
Polyurethane, foam such as polyethylene, especially,
A polystyrene foam having an expansion ratio of about 50 to 80 times, which is regenerated using punched waste of an expanded polystyrene container for an instant food, can be regenerated inexpensively, has a small specific gravity of the resin itself, and is lightweight. Since it has good adhesiveness to the upper and lower fiber reinforced resin plates 2 and 3 and a sense of stability against pressure walking, it is very suitably used as the resin foam 1.

When the expansion ratio of the resin foam 1 is smaller than 20 times, the specific gravity of the resin foam 1 becomes larger than approximately 0.05, and the specific gravity of the entire composite plate 10 does not become so small. If the expansion ratio of the resin foam 1 exceeds 120 times, the strength of the resin foam 1 decreases, which is not preferable in terms of walking stability.

The upper and lower fiber reinforced resin plates 2 and 3 of the composite plate 10 are so-called FRP plates in which glass fibers are contained in a curable resin such as polyester, and the surface thereof is coated with a gel coat resin. I have. On the surface of the upper fiber reinforced resin plate 2, a number of small non-slip projections 2a are formed.

The reinforcing member 4 provided between the fiber reinforced resin plates 2 and 3 has an I-shaped cross section obtained by drawing a glass roving impregnated with a hardening resin such as polyester. A rib body,
In particular, a rib having excellent rigidity in which the ratio of glass rovings is 50 to 80% by weight is preferably used. The rib body in which the glass roving occupies less than 50% by weight has a little insufficient rigidity, while the rib body exceeding 80% by weight is weakened.

The rib body 4 having the above-mentioned I-shaped cross section has a relatively large bonding area with the upper and lower fiber reinforced resin plates 2 and 3 and a high bending strength, and is free standing at a freely determined position. Because of this shape, there is an advantage that a lean reinforcing effect is obtained, the bonding operation is easy, and the bonding can be firmly performed.

The distance between the ribs 4 is preferably set to about 10 to 20 cm.
It is desirable that the thickness of the rib body 4 be set to about 3 to 10 mm. The height of the rib body 4 is about 3 cm when the span (length in the longitudinal direction) of the cover A is about 1 m, and is about 5 cm when the span is about 1.5 m.
In the case of about 8 m to 3 m, it is desirable to set about 7.5 cm. Needless to say, the thickness of the resin foam 1 is the same as the height of the rib 4.

The rib body 4 is connected to upper and lower fiber reinforced resin plates 2 and
As the adhesive 5 to be adhered to 3, various adhesives such as epoxy-based, urethane-based, acrylic-based, and vinyl ester-based adhesives can be used. Among them, a solventless urethane-based adhesive is particularly preferably used. You.

When the fiber reinforced resin plates 2 and 3 are bonded to the upper and lower end surfaces of the rib body 4 by pressing them with the adhesive 5 therebetween, as shown in FIG. The resin foams 1 and 1 are simultaneously bonded and fixed because they enter the gap between the foams 1 and 1 and the upper and lower fiber reinforced resin plates 2 and 3 and the gap between the resin foams 1 and 1 and the ribs 4. .

The hard resin foams 7 and 8 provided along both sides in the width direction of the composite plate 10 are combined with the composite plate 1.
A hard resin foam having a relatively low expansion ratio is used, and the expansion ratio is preferably 50 to 8
A polystyrene foam having a pressure resistance of about 1.0 kg / cm ² and a pressure of about 0 is preferably used.

The rigid resin foam 7 on one side is provided with a receiving portion 7a, and the corresponding rigid resin foam 8 is provided on the opposite side in a correspondingly overlapping manner on the receiving portion 7a. A portion 8a is formed. Therefore, as shown in FIG. 4, the cover lids A, A are air-tight by overlapping the stepped part 8 a on the opposite side of the adjacent cover lid A via the packing 9 on the stepped part 7 a on one side of the cover lid A. Is to be connected to.

As shown in FIG. 5, the cover A having the above-described structure is arranged side by side in the opening 100a of the processing tank 100, and the packing 9 is placed on the receiving portion 7a of the cover A as shown in FIG. The cover lids are connected to each other by overlapping the overlapping step portions of the adjacent cover lids A with the. Thus, the processing tank 1
When the opening 100a of the cover 100 is covered with a plurality of cover lids A, the gap between the cover lids A is closed by the packing 9, so that the odor leaks from the processing equipment facility 100 and intrusion of dust and the like into the processing equipment facility 100 Can be prevented.

In addition, since the cover A is a foam having a high expansion ratio of 40 to 120 times that of the resin foam 1 in the middle of the composite plate 10, it is much lighter than the conventional cover and is required for opening and closing. Less labor, floats well when dropped in water, and does not have to worry about sinking.

Since the ribs 4 provided as longitudinal reinforcing members between the fiber reinforced resin plates 2 and 3 above and below the cover A have high rigidity and exhibit an excellent reinforcing effect, The cover A has high strength, particularly high flexural strength. Therefore, even if a person walks on the cover A, the cover A hardly bends as a whole, and the upper fiber reinforced resin plate 2 is supported by the resin foam, and the rib 4
Since there is no small deflection between the ribs 4 and the ribs 4 and the non-slip projections 2a are formed, the walking feeling is very stable.

FIG. 6 is a sectional view of a cover according to another embodiment of the present invention, and FIG. 7 is a partial perspective view of a mesh cylinder used as a reinforcing material for the cover.

The cover B has a vertically long reinforcing material provided between the upper and lower fiber reinforced resin plates 2 and 3 of the composite plate 20 and made of glass roving impregnated with a curable resin such as polyester. It differs from the above-mentioned cover A in that it is formed of a mesh cylinder 40 having a rectangular opening. Other configurations are the same as those of the cover A described above, and therefore, the same reference numerals are given to the same members in FIG. 6, and the description will be omitted.

Since the resin foam 1 in the middle of the composite board 20 is a foam having a high expansion ratio, such a cover B is lightweight, requires little labor for opening and closing, and floats and sinks well even when dropped in water. There is no. The reinforcing member provided between the upper and lower fiber reinforced resin plates 2 and 3 is a highly rigid mesh cylindrical body 40 made of glass roving impregnated with a curable resin, and has an excellent reinforcing effect. Because of this, the cover B also has a high strength, particularly a high bending resistance, and the walking feeling is stable.

[0037]

As is clear from the above description, the cover of the present invention is much lighter than the conventional cover, can reduce the labor required for opening and closing, can float well even when dropped in water, and has strength. In particular, since the deflection strength is large, the walking feeling when a person walks on it is stable, and
By freely setting the interval and the number of the I-shaped ribs and the like according to the size, it is possible to obtain necessary and sufficient strength without waste, and furthermore, the cover formed with the receiving step and the overlapping step, Many remarkable effects are achieved, such as leakage of odor and entry of dust and the like can be prevented by sandwiching a packing between the receiving step portion and the overlapping step portion.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cover according to an embodiment of the present invention.

FIG. 2 is a sectional view of the cover.

FIG. 3 is a partially enlarged sectional view of the cover.

FIG. 4 is a sectional view showing a connection state of the cover.

FIG. 5 is a plan view showing a use state of the cover.

FIG. 6 is a sectional view of a cover according to another embodiment of the present invention.

FIG. 7 is a partial perspective view of a mesh cylinder used as a reinforcing material for the cover.

[Explanation of symbols]

 A, B Cover 10, 20 Composite plate 1 High expansion ratio resin foam 2, 3 Upper and lower fiber reinforced resin plates 4 Reinforcement (rib) 40 Reinforcement (net cylinder) 5 Adhesive 7, 8 Hard resin foam Body 7a Receiving part 8a Stacking part 9 Packing

Claims (5)

[Claims] 1. A cover comprising a composite plate in which a fiber reinforced resin plate is laminated and integrated above and below a resin foam having a high expansion ratio, wherein a longitudinal direction of dividing the resin foam between the upper and lower fiber reinforced resin plates. A plurality of reinforcing materials are provided in parallel with a certain interval in the width direction, and the upper and lower ends are bonded to the upper and lower fiber reinforced resin plates, and this reinforcing material is pulled out of a glass roving impregnated with a curable resin A cover having a molded cross-section made of an I-shaped rib. 2. A cover comprising a composite plate in which a fiber reinforced resin plate is laminated and integrated above and below a resin foam having a high expansion ratio, wherein a longitudinal direction of dividing the resin foam between the upper and lower fiber reinforced resin plates. A plurality of reinforcements are provided in parallel at a fixed interval in the width direction, and upper and lower ends thereof are adhered to upper and lower fiber reinforced resin plates, and the reinforcements are made of glass roving impregnated with a curable resin. A cover comprising a screen cylinder having a vertically elongated rectangular opening. 3. The cover according to claim 1, wherein the proportion of the glass rovings in the rib body is 50 to 80% by weight. 4. The resin foam of the composite board is a foam having a foaming ratio of about 40 to 120 times.
4. The lid according to 1. 5. A hard resin foam having a low expansion ratio is provided between upper and lower fiber reinforced resin plates along both sides in the width direction of the composite plate, and a step portion is provided on one side of the hard resin foam and an opposite side is provided on the opposite side. 3. The cover according to claim 1, wherein the hard resin foam is formed with a stepped portion that is stacked on the stepped portion via a packing, respectively. 4.