JP2003290762A - Arcuate covering cap and method for constructing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an arcuate covering cap which has high conveyability and is easy to build and construct and a method for constructing the same. <P>SOLUTION: The method for constructing the arcuate covering cap 10 to be constructed in cap receiving sections of a water tank and aqueduct is provided with a process step of attaching locking members 12 to both longitudinal ends of a face plate 11 having a square flat plate shape, a process step of assembling the cap 10 by bringing both longitudinal ends of the face plate 11 in proximity to each other to curve the face plate to an arcuate form of a projecting shape, spanning chord members 13 between the locking members 12 facing each other and locking both ends to the locking members 12, and a process step of constructing the assembled cap 10 by spanning both longitudinal ends of the cap 10 across the opposite cap receiving sections. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arch-shaped cover and a method of constructing the same, and more particularly to an arch cover which improves the transportability of members and allows efficient assembly and installation.

[0002]

2. Description of the Related Art Covers for covering water tanks and waterways are required to have predetermined load strength and durability. In particular, in an installation place where the span of the lid receiving portion is long, the cover lid itself becomes large corresponding to the long span, and therefore it is required to reduce the weight while maintaining the strength and rigidity of the cover lid itself.

An arched cover is used as a cover that satisfies these conditions. The arch-type cover has a structure in which a flat plate is curved in an arch shape, or a plate material curved in an arch shape is added with a beam material or the like for strength reinforcement, and is previously assembled in an arch shape. Are often transported to the construction site and erected.

[0004]

However, since the arch-shaped cover has a curved structure, it is bulky, and particularly for a long-span cover, it has a large shape and is bulky, so that a large amount of transportation work is required. . Further, with the increase in the size of the cover lid, it has been difficult to align the lid with the lid receiving portion during installation. For this reason, it has not been possible to reduce transportation costs and installation costs. Therefore, an arch-shaped cover that is transported in a disassembled state and assembled after being assembled at the erection site has been considered. However, although such a cover lid improves transportability, it requires time and effort for assembly and installation, resulting in an increase in cost.

The present invention has been proposed in view of the above circumstances, and it is an object of the present invention to provide a lightweight arch-shaped cover which can be easily transported and assembled and which has sufficient strength. Has an aim. Another object of the present invention, which is also proposed at the same time, is to provide a erection method capable of efficiently carrying, assembling, and erecting the cover.

[0006]

SUMMARY OF THE INVENTION The present invention according to claim 1, which is proposed to achieve the above object, is an arch-shaped cover that is erected on a lid receiving portion of a water tank or a water channel, and has both longitudinal end portions. It is equipped with a square flat plate-shaped face plate with locking members attached to and long chords with engaging members attached to both ends, and the face plate is curved upward in a convex arch shape with both longitudinal ends close to each other. Then, the chord member is spanned between the facing locking members, and the engaging member is locked to the locking member.

According to the present invention, the face plate is flat in a disassembled state before the cover lid is assembled, and the face plate is curved to form the cover lid. Therefore, the bulk of each member in the disassembled state before assembly is reduced, and the transportability of the member to the erection site is improved. Further, the cover of the present invention is composed only of the face plate, the locking member, the chord member and the engaging member. Therefore, the structure is simple, the number of members is small, the assembly is easy, the member cost is reduced, and the weight can be reduced.

Further, since the face plate is curved in the shape of a convex arch, the load bearing strength is remarkably improved as compared with a flat face plate. This is because when a load is applied to the upper surface of the arch-shaped face plate, the face plate tries to bend and a pressing force is applied to spread out the longitudinal ends, but chords are hung across the longitudinal ends of the face plate and spreading is prohibited. As a result, the load bearing strength is increased as compared with the case where the face plate is suppressed from bending and is flat.

According to a second aspect of the present invention, in the cover lid according to the first aspect, the locking member has a shield plate that is folded downward over the entire length along the short side edge of the face plate. Has been done. Here, the arched cover is often erected in a sewer or a sewer, and when the erected cover is required to function as an odor preventive lid that seals off the odor emitted from these sewers. There is.

According to the present invention, the shielding plate of the locking member has a structure in which it is folded downward over the entire length of the short side edge of the face plate. Accordingly, if the lower edge of the shield plate is brought into contact with the lid receiving portion along the lid receiving portion, the locking property ensures the sealing property of the short edge of the face plate. Therefore, by adopting a structure that ensures the sealing property between the cover lids installed adjacent to each other, it is possible to provide the deodorizing function.

The present invention according to claim 3 is a method of constructing an arch-shaped cover lid which is provided on a lid receiving portion of a water tank or a water channel, wherein a locking member is attached to both longitudinal end portions of a rectangular flat face plate. The end face of the face plate is curved in a convex arch shape with both ends close to each other, and a chord member is hung between the facing locking members to lock both ends to the locking member. The process of assembling the cover lid and the step of bridging the longitudinal end portions of the assembled arch-type cover lid across the opposite lid receiving portions.

According to the present invention, the cover is assembled at the construction site, and the face plate before assembly is flat. Therefore,
The bulk of the member in the disassembled state before assembly can be significantly reduced, and the transportability of the member to the erection site is improved. Further, since the number of members constituting the cover lid is small and the structure is simple and the weight can be reduced, it is easy to assemble the cover lid and to move the assembled cover lid to the lid receiving portion to erect it during installation.

According to a fourth aspect of the present invention, the lid receiving portion is
Equipped with a fixing member having a height adjustable pressing portion,
In the erection process of the cover, the height of the pressing portion is adjusted and the upper surfaces of both longitudinal end portions of the face plate are pressed downward and fixed. According to the present invention, the cover lid can be pressed and fixed only by adjusting the height of the pressing portion of the fixing member, which facilitates the erection work.

Various structures can be adopted for the fixing member. For example, it is possible to adopt a configuration in which a pedestal nut in which a female screw is carved on a cylindrical material having a predetermined height is vertically fixed to the lid receiving portion, and a flat pressing plate is fixed by screwing a bolt into the pedestal nut. According to this configuration, the upper end of the longitudinal end portion of the face plate can be pressed and fixed downward by the pressing plate by screwing the bolt into the pedestal nut while bringing the end portions of the pressing plate into contact with the upper faces of the longitudinal end portions of the face plate.

According to a fifth aspect of the present invention, the lid receiving portion is
The covering member is provided with a positioning member having a pressing plate that can project and retract in the longitudinal direction of the covering lid. The cover lid is moved in the longitudinal direction to position the erection position by adjusting the protruding / retracting amount while abutting the short side edge.

Here, in a long-span water tank or a water channel, the distance between the lid receiving portions facing each other is widened, and the arch-shaped lid is also large in size and light in weight, while being considerable in weight. For this reason,
When the cover lid is hung on the lid receiving portion, it becomes extremely difficult to perform a positioning operation for aligning with the fixed position. In particular, the positioning operation for moving the cover lid in the longitudinal direction must be performed by sandwiching the water tank or the water channel, which is more difficult and requires much labor than the positioning operation for moving the cover lid in the lateral direction.

According to the present invention, only by adjusting the protruding / retracting amount of the pressing plate by the positioning members provided on the opposed lid receiving portions, the short side edge of the face plate is pressed to move the cover lid in the longitudinal direction of the face plate. It can be easily moved. As a result, the positioning work can be easily performed without requiring labor, and the covering lid can be efficiently installed.

Various structures can be adopted for the positioning member. For example, a nut is fixed to the receiving frame of the lid receiving part so that its axial direction faces the water tank (water channel) side, and the tip of the bolt screwed into the fixed nut is locked only in the axial direction of the bolt and in the circumferential direction. It is possible to adopt a configuration in which the pressing plate is rotatably locked. According to this configuration, by adjusting the screwing amount of the bolt, the distance between the receiving frame and the pressing plate can be increased or decreased, and the protruding / retracting amount of the pressing plate in the longitudinal direction of the cover can be adjusted.

According to a sixth aspect of the present invention, the pressing plate has a shape that abuts over the entire length of the short side edge of the cover, and the pressing plate is attached with a seal member having elasticity. A pressing plate is pressed against the positioned cover lid from both sides in the longitudinal direction, and the seal member is installed in a state of being pressed against the short side edge of the face plate.

According to the present invention, the cover lid is installed in a state where the seal member is pressed against the short side edge of the face plate, whereby the sealing performance between the lid receiving portion and the short side edge of the face plate is secured. . Therefore, if a structure that secures the sealing property between the cover lids installed adjacent to each other is adopted, a deodorizing function can be provided, and it can be applied to a sewer tank or a sewer.

Further, according to the present invention as set forth in claim 7, the locking member is provided with a shielding plate which is folded down over the entire length along the short side edge of the face plate, and the lid receiving portion has a cover lid. A seal member is attached along the shorter side edge of the face plate, and the cover plate is installed so that the lower edge of the shield plate of the locking member abuts the seal member of the lid receiving portion in the process of installing the cover. Has been done.

According to the present invention, the shield plate of the locking member has a structure in which the shield plate is folded downward over the entire length of the short side edge of the face plate. Thus, if the lower edge of the shield plate is abutted on the seal member attached to the lid receiving portion to be installed, the sealing performance between the lid receiving portion and the short side edge of the face plate is secured. Therefore, if a structure that secures the sealing property between the cover lids installed adjacent to each other is adopted, a deodorizing function can be provided, and it can be applied to a sewer tank or a sewer.

Here, it is preferable that the face plate and the chord member constituting the cover used in the present invention are made of synthetic wood made of fiber reinforced hard resin foam. That is, if the cover lid is made of a glass fiber reinforced plastic foam plate material that is not deteriorated by ultraviolet rays, durability and workability can be improved and weight reduction can be realized. More preferably, the plate material constituting the cover can be formed of a resin reinforced with long fibers embedded in the longitudinal direction (referred to as “synthetic wood”), and more preferably glass long fibers in the longitudinal direction. It can be formed of a thermosetting resin foam that is aligned and embedded.

The cover lid may be made of a plate material made of the above-mentioned synthetic wood alone, but the cover lid may be made of a composite material obtained by vertically stacking plate materials made of synthetic wood or resin foam. The density of synthetic wood is generally 500 to 1000 kg / m ³ (0.5 to 1.0
g / cm ³ ) and the content of long fibers as a reinforcing material is 4
It can be about 0 to 60% by weight. The long fibers may be either inorganic or organic, but glass fibers are preferably used. As the thermosetting resin foam, a hard polyurethane resin or a hard polyester resin can be preferably used.

The types of foamed resin in the foam include:
For example, a thermosetting resin such as urethane resin, epoxy resin, vinyl ester resin, unsaturated polyester resin, or phenol resin, which is hard, is preferably used.
In addition, in order to improve compression strength and reduce costs, inorganic fillers such as calcium carbonate, gypsum, talc, aluminum hydroxide, and clay in the foamed resin, and lightweight aggregates such as shirasu balloon, perlite, and glass balloon. May be added.

The fiber for reinforcing the foam may be, for example, inorganic fiber such as glass fiber, carbon fiber or metal fiber, organic fiber such as natural fiber or synthetic resin, but strength and economy. Glass fiber is suitable from the viewpoint of the property. Examples of the glass fiber include glass roving, glass roving cloth, glass mat, and continuous strand mat. This fiber may be used alone, two or more layers may be laminated, or long fibers and short fibers may be mixed and used. In addition, it is lightweight to use long glass fiber reinforced hard urethane foam (for example, Sekisui Chemical Co., Ltd. product name "Eslon Neo-Lumber FFU") made by reinforcing long glass fibers in the longitudinal direction to form reinforcing fibers. It is the most preferable in order to secure high efficiency, durability and workability.

The stress applied to the face plate of the cover and the chord material is
A high bending rigidity (EI) in the longitudinal direction is required mainly due to a bending moment with the longitudinal ends as fulcrums.
Therefore, when face plates and chords are made of synthetic wood, members are cut from the original plate so that the fiber direction contained in the synthetic wood is the longitudinal direction of each member, or synthetic wood having different fiber directions is laminated. It is good to assume.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an arch-shaped cover 10 according to an embodiment of the present invention, and FIGS.
6 is a perspective view showing an assembling process of the cover lid 10 shown in FIG. 5, FIG. 5 is a perspective view showing the structure of the lid receiving portion A for erection of the cover lid 10, FIG.
[Fig. 2] is a plan view and a front view showing a state in which the cover lid 10 is installed on the lid receiving portion A.

In the method of constructing the arch-shaped cover 10 of the present invention, the cover 10 is assembled at the construction site and the assembled cover 10 is installed on the lid receiving portion A. Therefore, the assembly procedure will be described first while showing the structure of the arch-shaped cover 10. The cover 10 used in this embodiment is
As shown in FIG. 1, a square flat face plate 11 is curved in an arch shape, and two chord members 1 are provided between both longitudinal ends of the curved face plate 11.
It has a structure in which 3 and 13 are bridged.

To assemble the cover lid 10, first, referring to FIG.
As shown in (a) and (b), locking metal fittings (locking members) 12 are attached to both longitudinal ends of the face plate 11. The face plate 11 is a rectangular flat plate material made of flexible synthetic wood, and has four openings 11b at both longitudinal ends along the shorter side edges 11a. The locking metal fitting 12 is a metal fitting in which both longitudinal ends of a long metal plate are bent at substantially right angles in the same direction, and the ends of the bent portions are semicircular. A locking hole 12b is formed in the center of each of the bent portions at both ends, and four openings 12a are opened in the longitudinal direction in the flat plate portion between the bent portions so as to be aligned with the opening 11b of the face plate 11. Has been.

As shown in FIG. 2 (a), the locking metal fitting 12 passes the bolt B through the opening 11b of the face plate 11 and the opening 12a of the locking metal fitting 12, and the nut N is attached to the shaft of the bolt B protruding from the opening 12a. It is fastened and fixed to the face plate 11.

Next, as shown in FIGS. 3A and 3B, engaging fittings (engaging members) 14 are attached to both ends of the chord member 13. The chord material 13 is a long plate material made of synthetic wood,
Two openings 13a are formed at both ends so as to be aligned in the longitudinal direction. On the other hand, the engaging fitting 14 is a flat fitting having a width substantially the same as that of the chord member 13, and one end in the longitudinal direction is semicircular. An engaging hole 14b is opened at the end on the semicircular side, and two openings 14a are formed at the other end side in line with the opening 13a of the chord member 13 in the longitudinal direction.

As shown in FIG. 3 (a), the engaging metal fitting 14 allows the bolt B to pass through the opening 14a of the engaging metal fitting 14 and the opening 13a of the chord member 13, and the nut N is attached to the shaft of the bolt B protruding from the opening 13a. Is fastened and fixed to the chord member 13. Two chord members 13 to which the engaging fittings 14 are attached are prepared.

Next, as shown in FIG. 4, the chord member 13 having the engaging metal fittings 14 attached thereto is attached to the face plate 11 having the engaging metal fittings 12 attached thereto. In this step, first, the face plate 11 is set so that the mounting surface of the locking metal fitting 12 faces downward,
The both longitudinal ends are brought close to each other and curved in an arch shape so that the central part of the longitudinal direction becomes convex upward. Then, with the face plate 11 curved, the bolt B is engaged with the engaging hole 14 b of the engaging member 14.
And through the locking hole 12b of the locking member 12,
The nut N is fastened and fixed to the shaft of the bolt B protruding from b. The above procedure completes the assembly of the cover 10.

Cover lid 10 assembled in this way
Has a structure in which a rigid chord member 13 is bridged between both longitudinal ends of a face plate 11 curved in an arch shape.
Both longitudinal ends of the are prevented from being deformed outward and longitudinally, and thus have improved rigidity.

On the other hand, the lid receiving portion A on which the covering lid 10 is installed is
As shown in FIG. 5, the fixing member 20 and the positioning member 21 provided on the receiving frame B are provided. The receiving frame B is a long frame having an L-shaped cross section provided along the edge of the water tank (water channel), and the horizontal portion is fixed to the lid receiving portion A so that the vertical portion is located on the water tank side. ing. The fixing member 20 includes a pedestal nut 22, a bolt 23, a pressing plate (pressing portion) 24, and a sealing member 25. The pedestal nut 22 is a nut in which a female thread is formed on the inner circumference of a cylindrical metal material, and is used as a receiving frame B.
The pedestal nut 22 is welded and fixed to the flat surface of the pedestal so that the axial direction of the pedestal nut 22 is vertical.

The pressing plate 24 is a metal fitting bent in an L shape, and a cushioning member 25 made of rubber is provided on the lower surface of the end of the horizontal portion.
Is affixed, and an opening 24a is opened at approximately the center of the horizontal portion. Further, in the vertical portion of the pressing plate 24, when the buffer member 25 is pressed and brought into contact with the upper surface of the face plate 11 of the cover lid 10 while the horizontal portion is maintained in a substantially horizontal state, the lower edge of the vertical portion 24 is the lid receiving portion. It has a height to abut A. And the pressing plate 2
4 is screwed into the pedestal nut 22 by passing the bolt 23 through the opening 24a of No.
The cushioning member 25 presses and fixes the face plate 11 of the cover lid 10 while abutting against.

On the other hand, the positioning member 21 includes a nut 26,
It comprises a bolt 27, a pressing plate 28 and a sealing member 29. The nut 26 is welded and fixed to the vertical portion of the receiving frame B, and the nut 26 is bolted toward the water tank (water channel) side.
7 is screwed in, and the tip of the bolt 27 is the pressing plate 2
The pressing plate 28 is locked by being fitted into the side surface of the pressure plate 8. In other words,
The bolt 27 has a structure in which a pressing plate 28 is axially locked so as to be rotatable in the circumferential direction of the bolt shaft. A seal member 29 made of rubber is attached over the entire side surface of the pressing plate 28, and the lower edge of the seal member 29 is in close contact with the upper surface of the lid receiving portion A.

In this positioning member 21, when the bolt 27 is rotated clockwise, the pressing plate 28 is moved to the water tank (water channel) side as the bolt 27 is moved in the axial direction, and conversely, when the bolt 27 is rotated counterclockwise. 28 moves in the direction of approaching the receiving frame B. That is, by adjusting the bolt 27, the pressing plate 28 can project and retract in the longitudinal direction of the cover 10. Further, as the pressing plate 28 is projected and retracted, the seal member 29 is projected and retracted while the lower edge thereof is closely attached to the lid receiving portion A. The positioning member 21 and the fixing member 20 having such a configuration are also symmetrically arranged in the lid receiving portion A that faces the water tank or the water channel and faces each other.

Next, the cover 10 of this embodiment shown in FIG.
The process of erection of the lid on the lid receiving portion A will be described with reference to FIGS. First, the bolt 23 fastened to the pedestal nut 22 is loosened, and the bolt 23 and the pressing plate 24 are once removed. Then, the cover lid 10 is bridged between the opposing lid receiving portions A, and the short side edge 11 a of the face plate 11 is placed close to the seal member 29 of the positioning member 21.

Then, the bolt 27 of the positioning member 21 is adjusted so that the seal member 29 of the pressing plate 28 is brought into contact with the short side edge 11a of the face plate 11, and the bolt 27 is further adjusted to move the cover lid 10 in the longitudinal direction. Position by pressing and moving. If the cover lid 10 is moved too much during the positioning work,
Once, the bolt 27 is loosened and the pressing plate 28 is retracted, and the lid receiving portion A side facing the same is similarly pressed and moved to perform positioning. When the positioning of the cover lid 10 in the longitudinal direction is completed, the cover lid 10 is moved in the lateral direction of the face plate 11 and the long side edges are brought into contact with the adjacent cover lid (not shown).

After that, the bolts 27 of the positioning member 21 are tightened at the opposite lid receiving portions A at the same time. As a result, the seal member 29 is pressed against the short side edge 11a of the face plate 11, and the lower side edge of the seal member 29 is covered with the lid receiving portion A.
The sealability is secured by closely adhering to the upper surface of the.

Subsequently, the pressing plate 24 of the fixing member 20 is supported so that the cushioning member 25 is located at the center of the longitudinal end of the face plate 11, and the bolt 23 is screwed into the pedestal nut 22. Then, the bolt 23 is tightened until the cushioning member 25 presses the upper surface of the face plate 11. Through the above procedure, the cover lid 10 is positioned and fixed to the lid receiving portion A, and the installation is completed.

As described above, according to the method of constructing the cover lid of the present invention, the arch-shaped cover lid 10 itself can be easily assembled in the construction site in a short time, and the assembled cover lid 10 can be easily assembled in the lid receiving portion A. It is possible to position and fix to. Therefore, it is not necessary to transport the bulky cover that is assembled in advance, and it is possible to perform the installation with extremely high efficiency while reducing the transportation cost and the installation cost.

By the way, in the method of constructing the cover according to the present embodiment, the sealing member 29 is pressed against the short side edge 11a of the face plate 11 to secure the sealing property. However, the present invention is not limited to such a configuration. For example,
It is also possible to adopt a configuration in which the sealing property is secured between the locking metal fitting (locking member) attached to the face plate 11 and the lid receiving portion A.

FIG. 7 is a perspective view showing a locking member 15 having such a structure that it has a sealing property with the lid receiving portion A. The locking member 15 has locking parts 15c and 15c vertically provided near both longitudinal ends of a long flat plate part 15a.
The one longitudinal side edge of the flat plate portion 15a is folded back over the entire length downward (upward in the figure) at a substantially right angle to form a shield plate 15e, and the tip of the shield plate 15e is further bent at a predetermined angle. The shape is such that a contact portion 15f is provided.

A locking hole 15d is formed in the center of the locking portion 15c, and the flat plate portion 15 between the locking portions 15c is formed.
Four openings 15b are opened in a along the longitudinal direction so as to match the openings 11b of the face plate 11. This locking member 1
The length in the longitudinal direction of 5 is the same as the length in the lateral direction of the face plate 11, and the contact portion 15f with respect to the above-mentioned shield plate 15e.
The bending angle of is substantially the same as the angle formed by the long end of the face plate 11 and the lid receiving portion A.

The locking fittings 15 are fixed to both longitudinal ends of the face plate 11 in the same procedure as that shown in FIG. In this case, as shown in FIG. 8, the shield plate 15e of the locking member 15 is positioned outside the longitudinal direction of the face plate 11 and fixed. Then, the face plate 11 is curved to assemble the cover lid 10 'in the same procedure as that shown in FIG. Assembling the cover 10 ',
The shield plate 15e of the locking fitting 15 is located over the entire length of the face plate 11 along the short side edge 11a, and the short side edge 11a has a structure shielded by the shield plate 15e.

On the other hand, a lid receiving portion A for constructing the cover lid 10 '.
Is a fixing member 2 attached to the receiving frame B as shown in FIG.
0 and a positioning member 21 ′, and a sealing member 30 attached to the lid receiving portion A. The fixing member 20 has the same structure as that shown in FIG.
1'is a configuration in which the sealing member 29 is removed from the positioning member 21 shown in FIG. In addition, the seal member 3
0 is made of rubber and is attached to the upper surface of the lid receiving portion A on the water tank (water channel) side of the receiving frame B along the short side edge 11a of the face plate 11.

When the cover lid 10 'is installed on the lid receiving portion A, it is placed so that the abutting portion 15f of the locking metal fitting 15 is positioned on the seal member 30. And the positioning member 2
1'is adjusted to position the cover lid 10 'in the longitudinal direction, and then fixed by the fixing member 20. Cover 1
When 0'is installed on the lid receiving portion A, the locking member 15 'is caused by the weight of the cover lid 10' and the downward pressing force of the fixing member 20.
The contact portion 15f is pressed against the seal member 30 while being in surface contact therewith, so that the sealing property between the locking member 15 and the lid receiving portion A is secured.

As described above, according to the cover 10 ', the seal member 30 can be directly provided on the cover receiving portion A to ensure the sealing property with the locking fitting 15, and like the cover 10 described above. A stable sealing effect can be obtained. Also,
Similar to the cover lid 10 described above, the work of assembling, positioning and fixing the cover lid 10 'can be performed very easily.

The locking fitting 15 shown in FIG. 7 is the shield plate 1.
A contact portion 15f is provided at the tip of 5e for surface contact, but the lower edge of the shielding plate 15e is directly contacted with the seal member 30 of the lid receiving portion A without providing the contact portion 15f. Also good. Further, in the installation example shown in FIG. 9, the pressing plate 28 of the positioning member 21 'is brought into direct contact with the short side edge 11a of the face plate 11 for positioning, but the positioning member 21 shown in FIG. Similarly to the above, the seal member 29 may be used as a cushioning member for pressing the face plate 11 as a structure in which the seal member 29 is attached.

Further, although the above description does not refer to the contact structure between the cover lids 10 or the cover lids 10 'which are installed adjacent to each other, various structures for ensuring the sealing property may be adopted. it can. For example, it is possible to adopt a configuration in which a support plate is attached to the lower surface of the face plate 11 so as to project from the long side edge over the entire length along one long side edge of the face plate 11. According to this structure, the longitudinal side edges provided with the support plate and the longitudinal side edges of the cover lid adjacent to each other without the support plate are abutted against each other, and the support plate is abutted so as to cover the abutted portion of the longitudinal side edges from below. It is possible to secure the sealing property between the face plates.

[0054]

According to the present invention as set forth in claim 1, it is possible to provide a lightweight arched cover having high transportability, easy assembling at a construction site, and having sufficient strength at low cost. Become. According to the present invention described in claim 2, in addition to the effect described in claim 1, it is possible to provide an arched cover having a deodorizing function that exhibits a stable sealing effect. According to the erection method of the present invention as set forth in claims 3 to 5, it is possible to easily carry the cover lid in a disassembled state, and assemble the cover lid in a short time at the erection site and efficiently position and fix it. It becomes possible to perform erection with improved efficiency. According to the erection method of the present invention described in claims 6 and 7,
In addition to the effects described in claims 3 to 5, it is possible to perform erection having a deodorizing function that exhibits a stable sealing effect.

[Brief description of drawings]

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

2A is a perspective view showing a procedure for attaching a locking member to the face plate of the cover shown in FIG. 1, and FIG. 2B is a perspective view showing a state where the locking member is attached to the face plate.

3A is a perspective view showing a procedure for attaching an engaging member to the chord member of the cover lid shown in FIG. 1, and FIG. 3B is a perspective view showing a state in which the engaging member is attached to the chord member.

4 is a plan view of the face plate having the locking member shown in FIG.
It is a perspective view which shows the procedure which forms the cover shown in FIG. 1 by straddling the chord member which attached the engaging member shown in FIG.

5 is a perspective view showing a structure of a lid receiving portion corresponding to the cover lid shown in FIG. 1. FIG.

6A is a plan view showing a state in which the cover lid shown in FIG. 1 is installed on the lid receiving portion shown in FIG. 5, and FIG. 6B is a front view thereof.

FIG. 7 is a perspective view showing a modified example of a locking member.

8 is a perspective view showing a state in which the locking member shown in FIG. 7 is attached to a face plate.

9 is a front view showing a state in which a cover lid configured by attaching the locking member shown in FIG. 7 to a face plate is installed on a lid receiving portion.

[Explanation of symbols]

A lid receiving part 10,10 'Arch type cover 11 face plate 11a Short side edge of face plate 12 Locking member 13 chord material 14 Engagement member 15e Shield plate (folded back part) 20 fixing member 21 Positioning member 24 Pressing part (pressing plate) 28 Press plate 29 Seal member (positioning member seal member) 30 Seal member (seal member for lid receiving part)

Claims (7)

[Claims] 1. An arch-shaped cover that is installed on a lid receiving portion of a water tank or a water channel, and has a rectangular flat plate having locking members attached to both longitudinal ends, and a long plate having engaging members attached to both end portions. A lengthwise chord member, and the face plate is curved upward in a convex arch shape with both longitudinal ends being close to each other, and the chord member is hung between the opposing locking members to lock the engaging members. Arch-shaped cover that is formed by locking to. 2. The arch-shaped cover according to claim 1, wherein the locking member has a shield plate that is folded downward over the entire length along the short side edge of the face plate. 3. A method of constructing an arch-shaped cover lid which is erected on a lid receiving portion of a water tank or a water channel, which comprises a step of attaching locking members to both longitudinal end portions of a rectangular flat plate-shaped face plate, and the longitudinal end portions of the face plate. Assembling the arch-shaped cover by assembling the arch-shaped cover by bending the upper part closer to the upper part and bending it upward in a convex arch shape, and hanging the chord member between the facing locking members to lock both ends to the locking members. The method for erection of an arch-shaped cover lid, which comprises a step of bridging both longitudinal ends of the arch-shaped cover lid to the opposing lid receiving portions and erection. 4. The lid receiving portion includes a fixing member having a pressing portion whose height can be adjusted, and in the step of constructing the cover lid, the pressing portion is height-adjusted so that the upper surfaces of both longitudinal ends of the face plate are lowered. The method for constructing an arch-shaped cover according to claim 3, wherein the method is performed by pressing to fix the cover. 5. The lid receiving portion is provided with a positioning member having a pressing plate that is capable of projecting and retracting in the longitudinal direction of the cover lid to be installed, and the lid receiving portion facing each other in the step of constructing the cover lid. The urging position is positioned by moving the cover lid in the longitudinal direction by adjusting the amount of protrusion and retreat while abutting the pressing plate of the positioning member provided on the side edge of the face plate. Item 5. A method of constructing an arched cover according to Item 3 or 4. 6. The pressing plate has a shape that abuts over the entire length of the short side edge of the cover lid, and a sealing member having elasticity is attached to the pressing plate, and the positioned cover lid has a longitudinal direction. The method for constructing an arch-shaped cover according to claim 5, wherein the pressing member is pressed from both sides to erected the sealing member in a state of being pressed against the short side edge of the face plate. 7. The locking member includes a shielding plate folded back over the entire length along the short side edge of the face plate, and the lid receiving portion has a short side edge of the face plate of the cover lid. The seal member is attached along the cover member, and in the step of installing the cover, the seal member is installed so that the lower edge of the shielding plate of the locking member contacts the seal member of the lid receiving portion.
The method for constructing an arch-shaped cover according to any one of claims 1 to 5.