JP2006225039A - Curved cover lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a curved cover lid which is fixed to an opening on a treating pond, a water passage or the like and can be manufactured without using a mold and is excellent in lightweight properties, corrosion resistance and productivity. <P>SOLUTION: The curved cover lid is prepared by unifying the side edge of a sandwich panel, which is manufactured by laminating a surface plate made of a glass fiber-reinforced plastic each on the opening upper and lower ends of a honeycomb structure made of a glass fiber-reinforced plastic with a predetermined thickness, to a side face reinforcing material made of a glass fiber reinforced plastic. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cover that covers openings such as treatment ponds and waterways in water and sewage facilities and treatment plants for dust prevention, deodorization, fall prevention, etc., and in particular, the length in the longitudinal direction is about 3 to 10 m. The present invention relates to a cover with R suitable for being attached to an opening of a span.

  Conventionally, treatment ponds in water treatment plants (eg, coagulation ponds, flock formation ponds, sedimentation ponds, sand filtration ponds, diatomite filtration ponds), treatment ponds in sewage treatment plants (eg, sedimentation ponds, aeration tanks), water channels, Alternatively, a cover may be attached to an opening such as an upper side of a water storage unit / water flow unit in a factory facility or an agricultural facility that uses a large amount of water for the purpose of dust prevention, deodorization, fall prevention, and the like.

  Various covers have been proposed in consideration of lightness, corrosion resistance, productivity, and the like.

For example, Japanese Patent Application Laid-Open No. 9-78683 discloses a sandwich panel obtained by injecting and foaming a hard polyurethane foam material into a gap between a melamine plate and a phenol laminate, and covering the opening as described above. There has been proposed a cover lid that is cut into a free size and in which a foam surface such as a cut end is coated with a synthetic resin.
JP-A-9-78683

  The cover described in Japanese Patent Application Laid-Open No. 9-78683 is flat, but when the above-mentioned opening such as a treatment pond or water channel has a long span of about 3 to 10 m, a cover with R is adopted. May be. R attached to the cover is larger and tighter as the span becomes larger.

  Conventionally, when manufacturing such a cover with R, it is common to prepare a mold in advance and manufacture using this mold.

  For this reason, the length of the span is different, and it is necessary to prepare a different mold every time R changes. For example, manufacturing is not easy, and there is a point to be improved in terms of manufacturing cost.

  Furthermore, when the conventional cover with R is attached to the above-described opening such as a treatment pond or a water channel, it is necessary to reinforce the rib according to the span, and the larger the span, the larger the reinforcement. There was also a point to be improved in this aspect.

  The present invention is a cover with an R attached to the above-described opening such as a treatment pond and a water channel, and can be manufactured without using a mold, and has an R with excellent lightness, corrosion resistance, and productivity. The purpose is to propose a cover.

  In order to solve the above-mentioned problems, the cover with R proposed by the present invention has a glass fiber reinforced plastic surface plate at each of the upper and lower ends of the glass fiber reinforced plastic honeycomb structure having a predetermined thickness. The side edge of the laminated sandwich panel is integrated with a side reinforcing material made of glass fiber reinforced plastic.

  The honeycomb structure that forms the intermediate layer of the sandwich panel, the surface plate that forms the upper and lower layers of the sandwich panel, and the side reinforcement that is integrated with the side edges of the sandwich panel are strength, light weight, corrosion resistance, weather resistance, with R In consideration of flexibility for forming the cover, all are made of glass fiber reinforced plastic (in this specification, sometimes simply indicated as “FRP”).

  The predetermined thickness of the honeycomb structure forming the intermediate layer of the sandwich panel is the thickness required for the cover with R, the thickness of the FRP surface plate laminated on top and bottom, and the weight allowed for the cover with R Although it is determined appropriately according to, etc., it is about 20 mm to 70 mm.

  As the cross-sectional shape of the opening provided in the honeycomb structure, various shapes conventionally employed in the honeycomb structure such as a square, a hexagon, a circle, and the like can be adopted.

  In addition, the outer surface of the surface plate forming the upper and lower layers of the sandwich panel can be coated to improve weather resistance.

  The integration of the side reinforcing material to the side edge of the sandwich panel can be performed, for example, by attaching the side edge of the sandwich panel to the side reinforcing material made of FRP by the hand lay-up method.

The thickness of the cover with R of the present invention described above, and the weight of the cover excluding the side reinforcement, depending on the required strength, span length, etc., are 30 mm to 80 mm and 5 to 20 kg / m, respectively. Can be ² .

  In any case, the cover with R of the present invention in which each constituent member is made of FRP and the intermediate layer of the sandwich panel is formed of a honeycomb structure has an apparent density smaller than that of water, and can float on water.

The cover with R of the present invention has sufficient destruction safety at a center line load of 1.0 KN / m with an allowable deflection amount of 1/200 or less at a design load of 1.0 KN / m ² .

  Further, when the cover with R of the present invention is attached to an opening such as a treatment pond, it is formed in a constant gentle arc having a diameter R≈17 m, and becomes closer to a flat surface as the span becomes smaller. Even less noticeable.

  Further, the cover with R is formed in a square shape, a frame body that is curved in a convex arch shape in the longitudinal direction is attached to the periphery thereof, and wheels that run on rails are attached to the four corners of the frame body, An R-covered cover is provided, which travels on a pair of rails arranged on both ends in the longitudinal direction of the cover with R in a direction orthogonal to the longitudinal direction.

  If a wheel is attached to the cover with R attached to the periphery of the opening of the treatment pond and the vehicle can run on the rail, the opening can be opened and closed, and inspection and maintenance in the opening are facilitated. For example, if the rails arranged at both ends of the opening are further extended from the opening, the opening can be opened by moving the cover with R to the extended portion.

  In addition, although the frame was attached to the periphery of the cover with R, glass fiber reinforced plastic surface plates were respectively laminated on the upper and lower ends of the honeycomb structure made of glass fiber reinforced plastic having a predetermined thickness. A sandwich panel may be formed in a square shape, and a frame body curved in a convex arch shape in the longitudinal direction may be attached around the sandwich panel. In this case, the frame body replaces the side surface reinforcing material.

  It is preferable that the wheel is rotatably mounted with its rotating shaft inclined, and travels in contact with a surface facing the inside from the vicinity of the top of the rail having a circular cross section.

  The cover with R is usually installed in an environment that is exposed to wind and rain, but because the inclined wheel abuts from the top of the rail to the inside, the load of the cover with R is applied downward and diagonally outward on the rail. Even when used in strong winds, it is possible to achieve stable running that is difficult to derail.

  It is preferable that at least two cover covers with R are provided, and one cover cover with R can be accommodated by stacking another cover cover with R inside.

  For example, a pair of rails are arranged on the inside and on the outside on the upper planes of the opposing peripheral walls, which are both ends of the opening of the treatment pond. And a cover with an outer R that travels on a pair of rails, and if the inner cover with R is overlapped so that the outer cover covers, the opening of the treatment pond can be easily opened, and inspection and maintenance are easy Become. Since the opening can be opened by overlapping the cover with R, the rail does not need to extend beyond the opening in this case.

  According to this invention, a treatment pond (for example, a coagulation pond, a flock formation pond, a sedimentation pond, a sand filtration pond, a diatomite filtration pond) in a water treatment plant, or a treatment pond (eg, a sedimentation basin, an aeration tank) in a sewage treatment plant. A cover with R that is attached to an opening, such as the upper side of a water container or water flow unit, in a factory facility or agricultural facility that uses a large amount of water, or a water channel, and is manufactured without using a mold. Therefore, it is possible to provide an R-attached cover that is excellent in lightness, corrosion resistance, and productivity.

  In particular, since it can be manufactured without using a mold, even a small lot can be manufactured at low cost and delivered in a short period of time.

  In terms of manufacturing cost, the cost can be reduced by 20 to 50% compared to the case of manufacturing using a conventional mold.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

  The cover 1 with R of the present invention has FRP surface plates 3a and 3b at the upper and lower ends of the FRP honeycomb structure 2 having a predetermined thickness as shown in FIG. 2 (c). As shown in FIG. 1, the side edges of the sandwich panel formed by laminating the layers are integrated with FRP side reinforcements 4a and 4b.

  The cross-sectional shape of the opening provided in the honeycomb structure 2 is not limited to the hexagonal shape as shown in FIGS. 2B and 2C, but also square, round, etc. It can be made into a shape.

  As shown in FIG. 2A, coatings 8a and 8b can be applied to the outer surfaces of the surface plates 3a and 3b forming the upper and lower layers of the sandwich panel.

  The thickness of the honeycomb structure 2 forming the intermediate layer of the sandwich panel (the size in the vertical direction in FIG. 2A) is the thickness required for the cover 1 with R, and is made of FRP laminated vertically. The thickness is appropriately determined according to the thickness of the surface plates 3a and 3b, the weight allowed for the cover with R, and the like. In the example shown in FIG. 2A, the thickness of the honeycomb structure 2 is 25 mm, and the thickness of the surface plates 3a and 3b (the size in the vertical direction in FIG. 2A) is 5 mm. Further, the length in the longitudinal direction of the cover with R 1 is set to 5,000 mm corresponding to the width of the opening 10 (FIG. 1) of the treatment pond, and the length in the lateral direction of the cover with R 1 (side reinforcing material). The distance between the side edges of the sandwich panel in which 4a and 4b are integrated was set to 900 mm. Further, in the example shown in FIG. 2A, coatings 8a and 8b having a thickness of 1 mm are applied to the surfaces of the surface plates 3a and 3b.

  Both side edges of the sandwich panel formed in this way have an inverted L-shaped cross section as shown in FIG. 4 (a), and are gentle in the longitudinal direction so as to be bridged over the opening 10 of the treatment pond as shown in FIG. In contact with the inner corners of the arc-shaped side reinforcing material 4a (made of FRP) with R, and attached and integrated by the hand lay-up method as shown in FIGS. It was set as the cover 1 with R.

  Note that a plurality of bolt through holes (not shown) were provided at both ends in the longitudinal direction of the cover lid 1 with R for mounting to the opening 10 of the treatment pond.

  When the cover with R 1 is attached to the opening 10 (FIG. 1) (span: 4.7 m) of the treatment pond, the cover 1 with R is lifted by a lifting tool, and spanned to both ends of the opening 10; As shown in FIG. 3, both ends in the longitudinal direction of the cover lid 1 with R are pressed by the pressing metal 5 via the packings 6 a and 6 b, and both ends in the longitudinal direction of the cover lid 1 with the R are used by using fasteners such as bolts 7. Is fixed to both ends of the opening 10 of the treatment pond.

  In the example shown in FIG. 1, R is an arc-shaped cover lid 1 with a gentle arc.

  Each time the size of the span of the opening 10 (FIG. 1) of the treatment pond is changed, the size of R of the cover 1 with R attached to the opening 10 also changes, but the cover 1 with R of the present invention. In this case, an R-covered cover 1 having a predetermined length in the longitudinal direction is produced in consideration of the size of the span of the treatment pond opening 10 (FIG. 1), and the treatment pond opening 10 is formed as described above. If it mounts | wears with, it will become the cover lid 1 with R which has R of a desired magnitude | size, and will have desired load strength and proof stress. Further, even if the span becomes large, it is not necessary to perform rib reinforcement according to the span length.

  That is, even if there is a variation in the span size of the opening 10 (FIG. 1) of the treatment pond to which the cover with R is attached, it is not necessary to prepare a mold and manufacture the cover with R every time, Considering the span size of the treatment pond opening 10 (FIG. 1), it is only necessary to manufacture the cover with R 1 having a predetermined length in the longitudinal direction. The cover with R having the load strength and proof stress can be manufactured.

  In addition, the state with which the cover 10 with R of this invention was mounted | worn with the opening part 10 becomes a plane, and it becomes less conspicuous, so that the span of the opening part 10 (FIG. 1) of a processing pond becomes small.

  As mentioned above, although preferred embodiment of this invention was described with reference to the accompanying drawing, this invention is not limited to this embodiment, In the technical scope grasped | ascertained from description of a claim, various forms Can be changed.

  Next, another embodiment in which a wheel is attached to the cover with R of the present invention and the vehicle can run on a rail will be described with reference to the drawings.

  As shown in FIG. 5, the movable cover lids 15 a and 15 b with the R travel on the rail 12 provided on the upper portion of the peripheral wall 11 of the opening of the treatment pond or the like. Frame covers 16a and 16b that are curved in a convex arch shape in the longitudinal direction are provided around the cover cover with R 15 shown in FIG. The wheels 18a are attached to the four corners of the frame body 16a, and the wheels 18b are attached to the four corners of the frame body 16b. The R-covered lids 15a and 15b are configured such that the R-covered cover 15a overlaps and can travel so as to cover the outside of the R-covered cover 15b, and each has a different size and a different rail on which they travel.

  The rails 12 arranged for traveling are provided with a pair of rails 12b with R on the inner sides of the upper surfaces of the peripheral walls at both ends in the longitudinal direction of the cover lids 15a, 15b with R installed in the peripheral wall 11 of the opening 10. A pair of rails 12a are used on the outer side of the cover lid 15b, and a pair of rails 12a are used on the outer cover 15a with R, respectively. Due to this rail arrangement relationship, the R-covered cover 15 a overlaps the outside of the R-covered cover 15 b that covers the opening 10.

  As shown in FIGS. 6A and 6B, when the opening 10 such as the treatment pond is covered with the movable covering covers 15a and 15b with the R, the covering cover 15b with the R is covered with the covering cover 15a with the R. By moving the inner cover 15a to the inner side or moving the cover 15a with R and moving it over the cover 15b with R, approximately half of the opening 10 is opened, and internal inspection and maintenance become easy.

  When only a pair of rails is laid and the cover with R is of the same type, the rail is extended to open and close the opening 10 and the cover with R is moved onto the extended rail and opened. Part 10 is opened. However, in FIGS. 6A and 6B, since the cover with R can be overlapped, it is not necessary to extend the rail beyond the length of the opening 10, for example, a treatment pond that is covered with a peripheral wall of a predetermined width and does not have a rail extension space. Then, installation becomes easy.

  Next, the positional relationship between the wheels and rails will be described with reference to FIG. 7 and FIG. As shown in FIGS. 7 and 8, wheels 18a and 18b are respectively attached to the lower four corners of the frame bodies 16a and 16b provided around the cover lids 15a and 15b with R. The state of the attached wheels will be described in detail. Plate members 20a and 20b that are inclined in a state where the outside is positioned in the lateral direction of the lower portions of the frame bodies 16a and 16b, that is, the short side direction, are attached. Wheels 18a and 18b having rotation axes perpendicular to the members 20a and 20b are rotatably installed. Therefore, the wheels 18a and 18b rotate with the upper part of the rotation shaft inclined toward the outside.

  Two rails 12 having a circular cross section disposed on the upper plane of the peripheral wall 11 facing each other of the opening 10 are a pair of rails 12b positioned inside the opening 10 and a pair of rails 12 positioned outside thereof. The rail 12a is installed by a mounting bracket. The rail 12 may have a circular cross section, and a pipe-shaped one is used.

  As shown in FIG. 8, wheels 18 a formed in a corresponding arc shape on a circular arc from the top of the circular cross section of the pair of rails 12 a and 12 b installed inside and outside to the inside which is the opening 10 side, 18b contacts and rotates. Therefore, the load of the movable cover lids 15a and 15b with R is distributed to both ends in the longitudinal direction, and acts on the rails 12a and 12b obliquely downward and outward through the wheels 18a and 18b. The direction of this force makes it possible for the covered lids 15a, 15b with R to run stably without being derailed.

  As described above, since the frame body is attached to the cover 1 with R by the honeycomb structure made of FRP, and the wheel is provided on the frame body so that the vehicle can run, the light weight, the corrosion resistance, the productivity are excellent, and R in the longitudinal direction is provided. Since it is provided, it is hard to bend even when a load such as a person getting on the cover is inspected or the like, and it is excellent in strength.

  The cover with R is made of FRP, but the frame, wheels, and rails are made of metal such as stainless steel, but this is not restrictive, and durability and strength are ensured. For example, a hard synthetic resin other than metal may be used.

The perspective view explaining the state with which the cover with R of this invention was mounted | worn with the opening part of the processing pond. (A) A cross-sectional view in which a sandwich panel structure in the cover with R of the present invention is partially omitted, (b) a plan view illustrating a honeycomb structure in the sandwich panel structure of the cover with R of the present invention, (c) Perspective view. The side view which abbreviate | omitted one part explaining the state which mounts the cover with R of this invention in the opening part of a processing pond. (A), (b), (c) is the perspective view which abbreviate | omitted one part explaining the process of attaching and integrating the side edge of a sandwich panel to the side reinforcement material made from FRP by the hand lay-up method. The perspective view of the state which installed the cover with R of this invention so that driving | running | working was possible. (A) The top view of installation of the cover with R which enabled traveling, (b) AA sectional drawing of the top view (a). BB sectional drawing of Fig.6 (a). The C section enlarged view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cover with R 2 Honeycomb structure 3a, 3b Surface plate 4a, 4b Side surface reinforcing material 5 Holding metal 6a, 6b Packing 7 Fixing tools 8a, 8b such as bolts Coating 10 Opening 11 of processing pond Opening side wall 12 of processing pond , 12a, 12b Rail 15a, 15b Cover with R (movable)
16a, 16b Frame 18a, 18b Wheel

Claims (4)

The side edges of the sandwich panel made by laminating glass fiber reinforced plastic surface plates on the upper and lower ends of the glass fiber reinforced plastic honeycomb structure having a predetermined thickness are made of glass fiber reinforced plastic. Cover with R, integrated with side reinforcement.   The cover with R is formed in a square shape, and a frame body that is curved in the shape of a convex arch in the longitudinal direction is attached to the periphery thereof, and wheels that run on rails are attached to the four corners of the frame body. The cover with R according to claim 1, wherein the cover with an R travels on a pair of rails arranged on both ends in the longitudinal direction of the cover in a direction orthogonal to the longitudinal direction.   3. The wheel according to claim 2, wherein the wheel is rotatably mounted with its rotating shaft inclined, and travels in contact with a surface facing inward from the vicinity of the top of the rail having a circular cross section. Cover with R. 4. The cover with R according to claim 2, wherein at least two cover covers with R are provided, and one cover cover with R can be accommodated by stacking another cover cover with R inside. 5. .

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