JP2003012086A - Covering lid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a covering lid in which the recycling ratio is high, the requests of a green purchase method can be met, the corrosion resistance is excellent, the assembly is relatively simple, upper and lower synthetic resin plates can be renewed and used for a long time even when they are damaged, and any change in dimensions, etc., may be flexibly coped with. SOLUTION: A plurality of aluminum intermediate sashes 2 are disposed parallel to each other on the inner side of a peripheral aluminum frame 1, and synthetic resin plates 3 and 3 overlap thereon to form the covering lid fixed by stoppers. An elastically deformable packing 5 is fitted to an outer surface of the peripheral frame 1 or an outer surface of the frame 1 at both ends in the width direction as necessary. Every aluminum frame 1 or every intermediate sash 2 can be recycled. Since the upper and lower synthetic resin plates 3 and 3 have excellent corrosion resistance, and fixed by the stoppers, the assembly thereof is simple, and the synthetic resin plates can be easily replaced.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cover for covering an opening of a water treatment facility or the like.

[0002]

2. Description of the Related Art Conventionally, as a cover of this type, a cover having a three-layer structure has been known in which FRP plates are integrally bonded on the upper and lower surfaces of a low-foam resin plate containing a large amount of glass fibers. This cover has a large strength and can withstand a person walking on it, but since it has a large weight, there is a problem that opening and closing work is not easy.

Therefore, the applicant of the present invention, as shown in FIG.
A reinforcing intermediate bar 101 formed by drawing and molding a glass roving impregnated with a curable resin, and a resin foam 1 having a high expansion ratio.
02 and FRP plates 10 are alternately arranged on both sides.
A cover 100 in which 3 and 103 are integrally bonded has been developed. Since the cover 100 has high strength and is lightweight, it is easy to open and close, and is an excellent cover that floats well even when dropped in water.

[0004]

However, since the cover 100 is not easy to reuse the material, there is a problem that it is difficult to meet the demand for the improvement of the recycling rate due to the recent green purchasing law in the industry. Also, the upper and lower F
There is also a problem in assembling work that it takes a long time for the RP plate 103 to be adhered and cured.

As a cover lid which can be easily recycled, a cover lid 110 having a hollow structure made of an extruded aluminum material as shown in FIG. 9 is known. However, such a cover lid 110 made of aluminum is not so good in corrosion resistance. However, there is a problem that it is easily corroded by, for example, dew condensation on the back surface.
Moreover, this cover 110 requires several types of expensive extrusion dies to meet the required size and strength.
There is also a problem that it is not possible to flexibly respond to changes in size and shape.

The present invention has been made to address the above problems, and its main purpose is to have a high recycling rate, good corrosion resistance, relatively easy assembly, and damage or deterioration of the upper plate. Even in such a case, the upper plate can be replaced for a long time to be used for a long time, and it is possible to contribute to the effective use of resources by extending the usage period, and to provide a cover lid that can flexibly cope with changes in dimensions and the like. It is also an object of the present invention to provide a light weight cover lid that has good airtightness between the cover lids and the cover lid receiving frame, and is light in color.

[0007]

In order to achieve the above object, in the cover according to claim 1 of the present invention, a plurality of aluminum intermediate bars are arranged in parallel inside a four-round aluminum frame member. The synthetic resin plates are stacked on the upper and lower sides of the plate and fixed with a stopper.

The cover having such a structure has a high recycling rate because the aluminum frame material and the intermediate crosspiece except for the upper and lower synthetic resin plates can be recycled, and the upper and lower synthetic resin plates have corrosion resistance. Being excellent, it does not easily corrode due to condensation on the back surface. In addition, since the upper and lower synthetic resin plates are fixed with fasteners, it does not take time to cure the adhesive as in the case of bonding, and new synthetic resin plates can be used even if the upper and lower synthetic resin plates are damaged or deteriorated. It can be used for a long time by replacing it with a plate, and by extending the usage period in this way, it can contribute to the effective use of resources. And when changing the dimensions of the cover lid, it is not necessary to change the extrusion die like the conventional aluminum cover lid, and it is possible to flexibly by assembling using frame materials with different dimensions, intermediate bars and synthetic resin plates. Can respond. Further, the cover having the hollow structure as described above is lightweight, and the color tone can be freely changed by coloring the upper and lower synthetic resin plates in various ways.

Next, the cover lid according to a second aspect is the cover lid according to the first aspect, wherein elastically deformable packing is provided on the outer surface of the frame member on the four circumferences or on the outer surfaces of the frame members at both ends in the width direction. It is characterized by being attached.

When such cover lids are arranged side by side and covered on the opening of a water treatment facility or the like, the packings at the widthwise both ends of the cover lids adjacent to each other are in close contact with each other, so that the airtightness between the cover lids is improved, and the packings cause impact. It also has a relaxing effect. In particular, the cover lid with packing attached to the outer surface of the four-round frame material,
Since the packings at both ends in the longitudinal direction come into close contact with the cover-cover receiving frame at the peripheral edge of the opening, airtightness with the cover-cover receiving frame is also improved.

Next, in the cover according to the third aspect of the present invention, aluminum frame members at both ends in the width direction and a plurality of aluminum intermediate bars are arranged in parallel, and synthetic resin plates are stacked on the upper and lower sides of the frame. The end plates made of aluminum are fixed to both ends in the longitudinal direction with stoppers to form a receiving step portion on the frame material at one end while the overlapping step portion is formed on the frame material at the other end. Formed,
The packing is attached to either the upper surface of the receiving step portion or the lower surface of the stacking step portion.

Also in the cover having such a structure, since the upper and lower synthetic resin plates and the aluminum frame material excluding the packing, the intermediate rails and the end plates are all recyclable, the recycling rate is high and the upper and lower synthetic resin Since the plate has excellent corrosion resistance, it does not easily corrode due to condensation on the back surface. And since the upper and lower synthetic resin plates and the aluminum end plates are fixed by the fasteners, it can be assembled in a shorter time than the case of bonding, and replacement work when the upper and lower synthetic resin plates are damaged or deteriorated. It is easy to change the size, and the size can be changed more flexibly than the cover made of aluminum. Then, when the covering lids are arranged side by side over the openings of the water treatment facility and the like, the other overlapping step portion overlaps one receiving step portion of the covering lids adjacent to each other, and the packing is sandwiched between them, so that the space between the covering lids is increased. The airtightness is improved and the packing also exerts a shock absorbing effect.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view of a cover lid according to an embodiment of the present invention, FIG. 2 is a partial plan view of the cover lid, and FIG. 3 is AA of FIG.
FIG. 4 is a partially enlarged cross-sectional view taken along the line, and FIG. 4 is a partial cross-sectional view showing a state in which the cover is covered with an opening of a water treatment facility or the like.

As shown in FIGS. 1 to 3, the cover 10 has a plurality of intermediate bars 2 arranged in parallel inside a frame member 1 having four circumferences, and synthetic resin plates 3 and 3 are stacked on the upper and lower sides thereof. It is fixed by a stopper 4, and an elastically deformable packing 5 is attached to the outer surface of the frame member 1 on the four circumferences. A pair of handles 6 and 6 are attached near both ends in the longitudinal direction of the upper synthetic resin plate 3.

The four-round frame member 1 is a hollow frame member made of an aluminum extruded mold member (pull-out mold member). As shown in the enlarged view of FIG.
Two a are formed. The round groove 1a is formed in a so-called dovetail groove that widens in the back, and as described later,
By inserting the convex ribs 5a, 5a of the packing 5, the packing 5 can be attached with one touch. In the cover 10 of this embodiment, two round grooves 1a are formed on both side surfaces of the frame material 1, but the round groove 1a is formed only on the outer side surface of the frame material 1.
a may be formed, and the number of the round grooves 1a may be appropriately increased or decreased.

The intermediate rail 2 is also made of an aluminum extruded mold material (pull-out mold material) and has a Roman numeral "II" -shaped cross-sectional shape as shown in an enlarged view in FIG. The intermediate rail 2 is not limited to the above-described cross-sectional shape, and for example, an intermediate rail having an "I" -shaped cross-sectional shape, a rectangular pipe shape or a round pipe-shaped having a vertically long "B" -shaped cross-sectional shape. Any intermediate rail having a cross-sectional shape with high flexural strength, such as the intermediate rail, can be used.

The mutual spacing of the intermediate rails 2 varies depending on the span (length in the longitudinal direction) of the cover lid, but when the span of the cover lid is about 1 to 3 m, the mutual spacing is 50 to 200.
It is preferably set to about mm. The height of the intermediate rail 2 and the frame 1 is preferably set to about 30 to 75 mm in consideration of the span of the cover.

As the upper and lower synthetic resin plates 3 and 3, glass fiber reinforced resin plates such as FRP having high strength are preferably used, but not limited to this, and for example, polycarbonate or other plastic waste materials are reused. It is also possible to use a recycled resin plate or the like. Upper and lower synthetic resin plates 3,
A fine protrusion 3a for slip prevention is formed on the surface of the synthetic resin plate 3 on the upper side of 3, so that safety is enhanced so that a pedestrian does not slip his / her foot. The upper and lower synthetic resin plates 3 and 3 can be freely colored, and the color tone of the cover 10 can be freely changed by using synthetic resin plates colored in various colors.

The synthetic resin plates 3 and 3 described above use tapping screws as the stoppers 4, and the frame member 1 and the intermediate crosspiece 2 on the four circumferences.
It is fixed to. By fixing (dry fixing) the synthetic resin plates 3 and 3 with such tapping screws, it is possible to eliminate the disadvantage that it takes time to cure the adhesive as in the case of wet fixing using an adhesive. There is an advantage that the cover lid can be easily assembled in a relatively short time.

The above-mentioned tapping screw is preferably used as the stopper 4, but the invention is not limited to this.
For example, a blind rivet (a rivet of a type in which a shaft is pulled out and the tip is crimped) is also used.

Packing 5 attached to the frame member 1 on the four sides
Is made of neoprene sponge rubber, other synthetic rubber or elastomer resin, and is an elastically deformable hollow packing having a vertically long "D" -shaped cross-sectional shape as shown in an enlarged view in FIG. Two convex ribs 5a, 5a are formed on the back surface side of the packing 5, and the packing 5 does not drop by fitting the convex ribs 5a, 5a into the round grooves 1a, 1a of the frame member 1. Is installed as. The packing 5 does not necessarily need to be attached to all the frame members 1 on the four circumferences, and may be attached only to the outer side surfaces of the two frame members 1 and 1 at both ends in the width direction.

Further, the handle 6 has its case 6a fitted into the opening of the upper synthetic resin plate 3, and the four corners of the case 6a are fixed to the intermediate bars 2 and 2 by means of stoppers 41 (tapping screws). Installed by.

A plurality of cover lids 10 having the above-mentioned structure are arranged side by side on the opening of a water treatment facility or the like, and as shown in FIG. 4, both end portions in the longitudinal direction of cover lid 10 (only one end portion is shown in FIG. 4). Is placed on the cover-cover receiving frame 21 on the peripheral edge 20 of the opening. When the end portion of the cover lid 10 is placed in this way,
Since the end of the intermediate rail 2 of the cover lid 10 is locked to the cover lid receiving frame 21, there is no concern that the cover lid 10 will fall even if the intermediate rail 2 and the frame member 1 are not directly connected and fixed.

As shown in FIG. 4, the packings 5 at both longitudinal ends of the cover 10 closely contact the cover receiving frame 21, and the packings 5 at both widthwise ends of the cover 10 adjacent to each other also closely contact each other. The airtightness between the 10 and the cover receiving frame 21 is improved, and the packing 5 also exerts a shock absorbing effect.

When the cover 10 is covered on the opening of the water treatment facility as described above, the lower surface of the cover 10 is affected by the temperature difference between the upper side (outside air side) and the lower side (water treatment facility side) of the cover 10. Condensation may occur on the cover, but even if such condensation occurs, the synthetic resin plate 3 below the cover 10 has good corrosion resistance and will not easily corrode.

Moreover, the cover 10 can be easily disassembled by removing the stopper 4, and the synthetic resin plate 3 and the packing 5 can be removed.
Except for the above, since the aluminum frame material 1 and the intermediate crosspiece 2 can all be reused, the recycling rate is high and it is possible to sufficiently meet the demand for recycling according to the recent Green Purchasing Law.

As described above, the cover 10 can be assembled easily in a relatively short time, and even if the upper and lower synthetic resin plates are damaged or deteriorated, they can be replaced with new synthetic resin plates and used for a long time. Therefore, it is possible to deal with a change in dimensions relatively easily.

FIG. 5 is a partial plan view of a cover according to another embodiment of the present invention, FIG. 6 is a partially enlarged sectional view taken along the line BB of FIG. 5, and FIG. 7 shows the cover as a water treatment facility. FIG. 6 is a partial cross-sectional view showing a state in which the opening is covered.

The cover 11 has aluminum frame members 1A and 1A on both ends in the width direction and a plurality of aluminum intermediate bars 2 arranged in parallel, and synthetic resin plates 3 and 3 above and below the frame. The end plates 7 made of aluminum are placed in place of the frame material at both ends in the longitudinal direction, and are fixed to the end faces of the respective intermediate rails 2 by overlapping. Then, a pair of handles 6 are provided on the upper synthetic resin plate 3.
(In FIG. 5, only one handle 6 is shown).

The frame member 1A at one end of the cover 11 is shown in FIG.
It is a hollow frame member having a receiving step portion 1b formed therein as shown in an enlarged scale. The upper surface of the receiving step portion 1b is a band-like packing 51 made of synthetic rubber such as neoprene sponge rubber.
Are glued together. Then, the frame material 1A at the other end
Is a hollow frame member in which the overlapping step portion 1c is formed. The packing 51 may be adhered to the lower surface of the overlapping step 1c without adhering to the receiving step 1b.

Since the intermediate rail 2, the synthetic resin plate 3, the stopper 4, the handle 6 and the like are the same as those used in the cover of the above-mentioned embodiment, the description thereof will be omitted.

Also in the cover 11 having such a structure, since the aluminum frame material 1A except the upper and lower synthetic resin plates 3 and 3 and the packing 51, the intermediate rail 2 and the end plate 7 can be reused, the recycling rate can be improved. Since the upper and lower synthetic resin plates 3 and 3 have excellent corrosion resistance, they will not be corroded by dew condensation on the back surface. Since the upper and lower synthetic resin plates 3 and 3 and the end plate 7 are fixed by the fasteners, the assembly can be completed in a shorter time compared to the case of adhering, and when the synthetic resin plate 3 is damaged or deteriorated. It can be easily replaced.

When the cover 11 is lined up in an opening of a water treatment facility or the like, the receiving step 1b of the cover 11 adjacent to each other is overlapped with the overlapping step 1c of the other, and the packing 51 is interposed therebetween. Since the cover is sandwiched, the airtightness between the cover lids 11 is improved, and the packing 51 exerts a shock absorbing effect. Both ends in the longitudinal direction of the cover lid 11 are
As shown in FIG. 7, rubber packing 5 such as neoprene rubber
It is preferable to place it on the cover-cover receiving frame 21 in the opening with the two sandwiched therebetween. By doing so, the rubber packing 52 improves the airtightness between the cover-cover 11 and the cover-cover receiving frame 21, and exhibits a shock absorbing effect. To be done.

If necessary, the cover lids 10 and 1 described above are used.
1 internal space (a space between the frame members 1 and 1A and the intermediate crosspiece 2,
Alternatively, a space having a high expansion ratio may be filled in a space between the intermediate rails 2 to impart a large buoyancy to the cover lids 10 and 11.

[0036]

As is apparent from the above description, the cover according to the first aspect of the present invention has a high recycling rate, good corrosion resistance, is resistant to corrosion due to dew condensation, etc., and can be assembled in a relatively short time. Even if the upper and lower synthetic resin plates are damaged or deteriorated, they can be easily replaced with new synthetic resin plates and can be used for a long time, and the size can be easily changed. Further, the cover according to claim 2 has an effect that airtightness between the cover covers and between the cover cover and the cover receiving frame is enhanced by the packing, and a shock absorbing action is also exerted, and the cover according to claim 3 is It has substantially the same effect as the cover of claims 1 and 2.

[Brief description of drawings]

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

FIG. 2 is a partial plan view of the cover lid.

3 is a partially enlarged cross-sectional view taken along the line AA of FIG.

FIG. 4 is a partial cross-sectional view showing a state in which the cover is covered with an opening of a water treatment facility or the like.

FIG. 5 is a partial plan view of a cover lid according to another embodiment of the present invention.

6 is a partially enlarged cross-sectional view taken along the line BB of FIG.

FIG. 7 is a partial cross-sectional view showing a state in which the cover is put on an opening of a water treatment facility or the like.

FIG. 8 is a cross-sectional view showing an example of a conventional cover lid.

FIG. 9 is a sectional view showing another example of a conventional cover.

[Explanation of symbols]

1 Four-round frame material made of aluminum 1A Aluminum frame material on both ends in the width direction 1a Round groove 1b Receiving step 1c Stacking step 2 middle cross 3 synthetic resin plate 4 stops 5 packing 51 band packing 5a convex rib 6 handles 7 Aluminum end plate 10,11 Cover

Claims (3)

[Claims] 1. A cover which is characterized in that a plurality of aluminum intermediate rails are arranged in parallel inside a four-round aluminum frame member, and synthetic resin plates are stacked on the upper and lower sides thereof and fixed by a fastener. . 2. The cover according to claim 1, wherein elastically deformable packings are attached to the outer surface of the frame member on the four circumferences or the outer surface of the frame member at both ends in the width direction. 3. A frame material made of aluminum at both ends in the width direction and a plurality of intermediate bars made of aluminum are arranged in parallel, and synthetic resin plates are stacked on the upper and lower sides thereof and fixed by a stopper, and both ends in the longitudinal direction. An aluminum end plate is fixed with a stopper to form a receiving step portion on the frame material at one end, while forming a stack step portion on the frame material at the other end, and an upper surface of the receiving step portion or A cover with a packing attached to either one of the lower surfaces of the overlapping steps.