JP2002227286A - Attaching construction for grating to supporting frame member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attaching construction for grating to a supporting frame member of a U-shaped side ditch having soundproofing ability and endurance. SOLUTION: At a predetermined position of a top plate with an U-shaped cross section located at the top portion of a concrete side plate of a grating supporting member for the U-shaped concrete side ditch, a square recessed drop portion lacking in an inner side plate is provided; for the recessed drop portion, a rubber member is used which is a square tubing used laterally with a bolt hole at the bottom portion, one end of the bottom portion is cut out, the top portion is made flush with the top plate of the supporting frame member, relevant portions are notched so that a projected end edge of the top plate of the supporting frame member at an opening, bite into the light and left upper corners an opposite side portion having an easily detachable width is fitted and inserted; as a pushing fittings for the grating, a horizontal portion comprising an L-shaped plate having a bolt hole in the horizontal portion and a reversed U-shaped plate connected to its upright portion is placed astride at the bottom of the rubber member; the reversed U-shaped plate having a cut trench touches and straddles the notch portion at the upper edge of the end plate of the grating adjacent to the recessed drop portion; and a nut is tightened through a washer for a projected bolt and the holding fittings is fixed to the recessed drop portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a grating (a gutter cover) to a U-shaped gutter made of reinforced concrete and a receiving frame member of a cross gutter (hereinafter, the cross gutter is omitted except for a part).

[0002]

2. Description of the Related Art Conventionally, a concrete lid or a metal (galvanized steel or stainless steel) or FRP grating is provided on the upper surface of a U-shaped groove block of a side groove. Therefore, metal gratings having mechanical strength due to their structure are often used. In order to support the grating, a step surface is provided inside the concrete side plate of the U-shaped groove block, but it is necessary to secure sufficient strength around the step surface where the weight of the vehicle running on the grating acts directly. In many cases, an inner flange protruding inward is formed.

Incidentally, since the U-shaped groove block is made of concrete, a molding error is unavoidable, so that the grating is not always uniformly placed on the step surface. In such a case, the position of the load applied to the grating changes as the vehicle runs or the person walks, and the grating is likely to emit noise on the step surface.

In order to prevent or reduce the generation of noise, a cushioning material such as a rubber packing is interposed between the step surface and the grating. However, since a load is constantly applied, there is a problem in their durability. For this reason, there are many proposals in which the step surface is inclined downward and formed into various shapes, and the both sides of the lower surface of the grating are formed into various shapes so as to be in close contact with them.

[0005] However, even if various measures are taken to prevent or reduce the generation of noise, in the case of steel gratings, it is inevitable that the metal bends in response to the load and generates a metallic sound upon restoration. Is fixed to the receiving frame member. In other words, it is common to provide a square recessed portion (dent) in the grating to solve the problem, but the main bar may be cut out to reduce the strength. In the following, problems will be raised for each example.

For example, the inside of the upper part of the concrete side plate is L
There is a metal plate that covers the notched surface of the mold, and the concave bottom plate at the specified position of the grating is fixed with bolts via coils (Utility Model Registration No. 3056418). There is a disadvantage that the bolt holes are easily clogged during cleaning and the recovery is not easy. In addition, a fixing method using a bolt and a cap nut is also used for this fixing (JP-A-6-257193). In addition, a concave portion is provided at a predetermined position of the grating, and an L-shaped horizontal surface of the U-shaped groove and a lower surface of the concave portion of the grating are fixed with a bolt and a cap nut via a cushion material. The new model registration No. 3056490) has the disadvantage that the cushioning material does not withstand the load for a long time.

Further, as shown in FIGS. 14 and 15, a metal plate covering the inside and outside and the inside of the top and top of the concrete side plate which is notched in an L shape is lifted up integrally with the concrete side plate via an anchor. For a concrete U-shaped groove block provided with a grating step surface having a square pipe at the lower part on both sides, a concave portion made of a square metal plate is provided at a predetermined position of the grating in contact with the vertical surface cut out in the L shape. A U-shaped groove block L-shaped horizontal surface and the bottom surface of the concave portion of the grating are fixed by bolts and cap nuts through a raised square pipe integrated with the grating body. In addition to this U-shaped groove block, as shown in FIG. 16, the inside of the upper part of the side plate of the concrete portion is cut out in an L-shape to form a stepped surface, and furthermore, an inner flange projecting inward together with the stepped surface is formed. Things are also used.

Further, as shown in FIG. 17, the inside of the upper part of the side plate of the concrete portion is cut out in an L shape, the step surface is inclined downward, and the inner surface is formed to project inward by making the cross section of the inclined surface a convex curved surface. Then, the top surface of the concrete portion, the outer surface of the upper side plate and the inner surface up to the step surface are covered with a metal plate, integrated with the concrete portion via an anchor, and a cap nut is welded and fixed to the metal plate covering the inner surface of the concrete portion. In order to engage with the step surface of the concrete U-shaped groove block, one side of the plate having an L-shaped cross section is fixed horizontally below the grating end plate, and the other side is bent inward on the way. With a reinforcing piece perpendicular to the horizontal side interposed from the tip, a concave portion made of a square metal plate is provided at a position corresponding to the cap nut of the U-shaped groove block, and a soundproof side groove groove fixed to the cap nut with bolts. Chingu have also been used.

Although the metal grating shown in FIGS. 14 to 17 does not move even if the metal grating is flexed, the generation of metal noise is avoided and the grating has the effect of preventing theft. If the cap nut is located below (Figs. 14 and 16) or on the side (Fig. 17) when cleaning the dust and returning it to the original position, debris will adhere to the cap nut and it will be difficult to clean. Often becomes. When the bolt is below (Fig. 15), when removing the grating by cleaning, the screw thread of the bolt is easily cut off by the screw hole of the raised pipe, which is likely to hinder fixing with the cap nut. There is a disadvantage that. In the case of tightening with bolts, the operation is complicated because the bolts are relatively long, and loosening is caused by vibration after tightening, which may result in scattering or damage due to metal fatigue. In addition, in FIGS. 14 to 16 using the raised square pipe, there is a disadvantage that the strength is reduced because the bolt holes are large.

[0010]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the above-mentioned drawbacks and to provide a reinforced concrete U-shaped side groove and a mounting structure of a grating to a receiving frame member of a transverse groove for the purpose of soundproofing and durability. It is.

[0011]

SUMMARY OF THE INVENTION Here, the present inventor has determined that (a) the top plate of the U-shaped cross section that covers the upper portion of the concrete side plate of the grating receiving frame member in the concrete U-shaped side groove and the transverse groove. Opposite side 2 is formed by cutting out the inner plate of the portion having a U-shaped cross section as a square-shaped concave portion, so that one side plate is missing, and the edges of the top plate at the opening protrude inward from each other.
A side plate and an outer plate having a U-shaped cross section are integrally provided with a receiving frame member composed of another side plate that may be used for it and a bottom plate on which bolts are protruded and fixed. As a rubber member, a tubular tube with a square cross section used in the horizontal direction has a bolt hole at the center of the bottom, the bottom is cut at one end, the top is flush with the top plate of the receiving frame member at the opening of the recess, and the left and right The upper corner has a shape in which the protruding edge of the top plate of the receiving frame member at the opening of the concave portion is cut out so as to bite, and the opposing side portion has an easily detachable gap with the opposing two side plates forming the concave portion. (C) As a holding member for grating, an L-shaped plate having a width equivalent to the inside of the bottom of the rubber member and having a bolt hole in a horizontal portion, and an inverted U-shaped plate connected to the upright portion thereof The horizontal part of the L-shaped plate is a rubber part On the bottom of the end plate, the inverted U-shaped plate is abutted on the notch portion of the upper edge of the grating end plate adjacent to the recess, and the inverted U-shaped plate is previously set in order to avoid the main bar on the end plate. The inventor has found a mounting structure for the grating on the receiving frame member, which is provided with a cut groove provided in the letter-shaped plate and a nut is fastened to the protruding bolt of the recessed bottom plate via a washer and the holding metal is fixed to the recessed portion.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, concrete U
As an example of a concrete U-shaped gutter having a U-shaped gutter made of concrete, the inside and outside of the upper part of the concrete side plate and the top part of the U-shaped gutter and the transverse groove (hereinafter, the description of the transverse groove are omitted) are covered with metal plates with anchors. Notch the inside of the side plate into an L shape (Fig. 1), or form an inner flange protruding further inside (Fig. 2), and anchor the outer and top portions of the upper part of the concrete side plate and the step surface inside the upper part of the concrete side plate. The inside of the concrete side plate of the U-shaped gutter or the concrete side plate which is covered with a metal plate attached with a metal plate is inclined downward with a stepped surface, and the cross section of the inclined surface is formed into a convex curved surface and the inside is inclined. Form a protruding inner flange, and use an anchored metal plate to extend to the outside and top of the upper part of the concrete side plate and to the vertical surface inside the upper part of the concrete side plate. The one covered with a receiving frame member (FIG. 3), and the shape of the receiving frame member is the same as the former, but is called a reborn side groove having a concave curved surface below the inside of the concrete side plate of the concrete U-shaped side groove. (Fig. 4).

As examples of the grating used in combination with the above, a concrete U-shaped gutter shown in FIGS. 1 and 2 has a raised square pipe, and a concrete U-shaped gutter shown in FIG. 3 has an end plate. Grating in which one side of a plate having an L-shaped cross section is fixed horizontally, the other side is bent inward on the way, and a reinforcing piece perpendicular to the horizontal side is interposed from the tip of the plate. The gutters which are placed on the concave curved surface on the lower side inside the concrete side plate can be given to the side grooves, where the cross section of the raised pipe has a triangular shape and the portion corresponding to the hypotenuse forms a convex curved surface.

In the combination of the concrete U-shaped gutter and the grating as described above, a U-shaped cross section (reverse U-shape) covering the upper part of the concrete side plate of the grating receiving frame member in the concrete U-shaped gutter (FIG. 5, 6) are provided at predetermined positions on the top plate with square depressions (FIGS. 7, 8). Concrete U-shaped gutters may be secondary products or cast-in-place. Usually, recesses are provided near the four corners of one grating (Fig. 13).
In some cases, the opposing pair is provided at a position for a joint of two gratings. As a result, the number of mounting structures for the grating on the receiving frame member can be reduced.

Although the recessed portion has a square shape, the side plate inside the U-shaped section of the receiving frame member is cut off to a predetermined depth and width, thereby missing one side plate corresponding to the position. As a result, the concave portion is formed by using two opposing side plates positioned so that the edges of the top plate in the opening project inwardly from the top plate and an outer plate having a U-shaped cross-section.
It consists of a side plate and a bottom plate on which bolts are projected and fixed, and is integral with the receiving frame member. Here, in addition to using the outer plate of the U-shaped cross section as the other one side plate as it is, if the width of the top plate of the U-shaped cross section is large, it may be newly provided inside the top plate. .

A rubber member (FIG. 9) for the recess
The rubber member is a tubular tube with a square cross section used for horizontal orientation, has a bolt hole in the center of the bottom, the bottom is cut at one end, and the top is the same as the surface of the top plate of the receiving frame member at the opening of the concave portion. A flat surface is cut out at the upper left and right corners so that the protruding edge of the top plate of the receiving frame member at the opening of the recess cuts into the opening, and the opposite side is easily detachable from the opposed two side plates forming the recess. Is used.

The rubber member is for burying a concave portion to form a flat surface in order to prevent walking obstacles and foreign matter accumulation. As the rubber member, various durable synthetic rubbers are suitable, but it is also possible to use a soft synthetic resin such as vinyl chloride. The cut portion at one end of the bottom portion is provided to facilitate the work of lifting the upper portion of the rubber member when attaching the holding member, which will be described later. Further, the rubber member is notched so that the protruding edge of the top plate of the receiving frame member cuts into the left and right upper corners, and the bottom portion is fixed by the holding metal. In addition, the rubber member does not fly out or turn over.
It is to be noted that if a plurality of ridges are provided on the upper surface of the bottom plate of the rubber member and the inside of the ridges is hollow, there is no need for loosening when the bolt is tightened (FIG. 9). In this way, the rubber member is used for a long time, but can be easily replaced.

[0018] Next, the holding bracket of the grating (Fig. 10)
The horizontal portion of the L-shaped plate having a width equivalent to the inside of the bottom of the rubber member and comprising an L-shaped plate having a bolt hole in the horizontal portion and an inverted U-shaped plate connected to the upright portion thereof The inverted U-shaped plate is placed on the bottom of the rubber member, and the inverted U-shaped plate abuts on the portion of the upper end of the grating end plate adjacent to the recess which is cut out to the thickness of the holding metal. In order to avoid the main bar, a cut groove of about the thickness of the main bar is provided in the inverted U-shaped plate in advance. In this case, if the main bar is prevented from being applied, the mechanical strength of the mounting structure is weak, and it is not practical. In addition, when a joint of the two gratings is applied to the holding metal, the width of the cut groove becomes the thickness of two main bars.

Finally, the bolts projecting from the bottom plate of the recess are tightened with nuts via washers and the holding metal is fixed to the recess (FIGS. 11 and 12), whereby the grating is also fixed. In addition, moderate quenching is given to holding metal fittings,
It is preferable that the shape does not change due to metal fatigue.

[0020]

As described above, in the structure for mounting the grating on the receiving frame member of the U-shaped gutter made of reinforced concrete, there is no cut portion of the main bar and no bolt hole of the raised square pipe for grating, so that the strength of the grating is not impaired. Further, since the washer is used to tighten the nut, the nut is not loosened by vibration. In addition, when cleaning the grating, there is no problem because the bolts are easy to clean.
Grating with excellent soundproofing and durability can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view in which grating is placed on a receiving frame member of a concrete side plate notched in an L shape.

FIG. 2 is an explanatory view in which grating is placed on a receiving frame member of a concrete side plate having an L-shaped notch and an inner flange projecting inward.

FIG. 3 is an explanatory view in which grating is placed on a receiving frame member of a concrete side plate in which a step surface cut into an L shape is inclined downward, a cross section of the inclined surface is formed as a convex curved surface, and an inner flange protruding inward is formed. Figure

FIG. 4 is an explanatory view in which grating is placed on a receiving frame member of a concrete side plate of a reborn gutter.

FIG. 5 is an explanatory view of a section in which grating is placed on a receiving frame member of a concrete side plate cut out in an L shape.

FIG. 6 is an explanatory view showing a grating placed on a receiving frame member of a concrete side plate notched in an L shape and viewed from above.

FIG. 7 is an explanatory view in which a concave portion is provided in the receiving frame member of FIG. 5 and grating is placed thereon.

FIG. 8 is an explanatory view in which a concave portion is provided on the receiving frame member of FIG. 6 and grating is placed thereon.

FIG. 9 is a cross-sectional view of a rubber member having a hollow inside the ridge.

[Figure 10] Plan view (a) and side view (b) of holding bracket

11 is an explanatory diagram in which a grating is attached to a concave portion of the receiving frame member of FIG. 7 with a rubber member and a holding member.

12 is an explanatory diagram in which a grating is attached to a concave portion of the receiving frame member of FIG. 8 with a rubber member and a holding member.

FIG. 13 is an explanatory view showing one grating attached to a concave portion of a receiving frame member with a rubber member and a holding metal member, as viewed from above.

FIG. 14 is an explanatory view of a cross-section in which a recessed portion of a grating is fixed with bolts on a stepped surface (welding of a cap nut) of a receiving frame member of a concrete side plate cut out into a conventional L-shape.

FIG. 15 is an explanatory view showing a cross section in which a concave portion of grating is fixed with a nut on a step surface (bolt welding) of a receiving frame member of a concrete side plate cut out in a conventional L-shape.

FIG. 16 is an explanatory view showing a cross section in which a recessed portion of grating is fixed with bolts on a step surface (cap nut welding) of a receiving frame member of a concrete side plate having a notch formed in a conventional L-shape and having an inner flange projecting inward.

FIG. 17 shows the inside (cap nut) of a concrete side plate receiving frame member in which a stepped surface cut out in a conventional L-shape is inclined downward, a cross section of the inclined surface is formed into a convex curved surface, and an inner flange is formed to project inward. Explanatory drawing with a cross section in which the recessed part of the grating is fixed to the welding) with bolts

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete side plate 2 Receiving frame member 3 Anchor 4 Depression 5 Bolt 6 Nut 7 Grating 8 End plate 9 Main bar 10 Twist bar 11 Square pipe 12 Reinforcement piece 13 Holding metal fitting 14 Bolt hole 15 Notch 16 Rubber member 17 Cutting part 18 19 hollow

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hiroshi Goto 1-1-9, Matsudaira, Yamato-cho, Kurokawa-gun, Miyagi Prefecture F-term in Okagrete Co., Ltd. (Reference) 2D063 CA02 CB06 CB26 CB28

Claims (1)

[Claims] 1. A receiving frame member (2) for grating (7) in a concrete U-shaped gutter and transverse groove.
As a square-shaped recess (4) at a predetermined position of the top plate of a U-shaped section covering the upper part of the concrete side plate (1),
The opposite side plate and the U-shaped section are positioned such that the first side plate is cut off by notching the inner side plate of the U-shaped section and the edge of the top plate at the opening projects inward from the side plate. The outer plate is integrally provided with a receiving frame member (2) consisting of another side plate that may be used for the outer plate and a bottom plate on which bolts are protruded and fixed, and (b) a rubber member ( As 16), a tube with a square cross section used for horizontal orientation has a bolt hole at the center of the bottom, the bottom is cut at one end, and the top is the top plate and the surface of the receiving frame member (2) at the opening of the recess (4). The same side is cut off at the left and right upper corners so that the protruding edge of the top plate of the receiving frame member (2) at the opening of the recess (4) bites into the recess. Fits a shape with a gap that can be easily attached to and detached from the opposing two side plates (C) As a holding member (13) for the grating, an L-shaped plate having a width corresponding to the inside of the bottom of the rubber member (16) and having a bolt hole in the horizontal portion and an inverted U connected to the upright portion thereof The horizontal portion of the L-shaped plate is placed on the bottom of the rubber member (16), and the inverted U-shaped plate is placed on the end plate (7) of the grating (7) adjacent to the concave portion (4). 8) The upper U-shaped notch is abutted and straddled, and in order to avoid the main bar (9) on the end plate (8), a cut groove is provided in the inverted U-shaped plate in advance, and the concave portion (4) is formed. ) A mounting structure for grating on a receiving frame member, comprising fastening a nut to a protruding bolt of a bottom plate via a washer and fixing a holding metal (13) to a recess (4).