JP2015055035A - Method of fixing grating to ditch block, and grating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of fixing a grating to a concrete-made ditch block used for a drain ditch without lowering the durability of the concrete-made ditch block.SOLUTION: A raising body 30 is fitted to an opening part 4 of a ditch block 1a so that respective raising materials 31 thereof are placed on respective cover engagement parts 5 of the ditch block 1a, and respective side wall inner surface lock pieces 40A have upper parts fastened and fixed to inner side faces of respective end sides of the respective raising materials 31 by first fastening means using bolts 50 and nuts, and also have lower parts locked to lower surfaces 7 of inner flanges of the ditch block 1a respectively so as to restrict lifting of the raising bod 30, and then a grating body 20 is placed on the raising body 30, fitted to the opening part 4 of the ditch block 1a, and fastened and fixed to upper side faces of respective end sides of the respective raising materials 31 by second fastening means using bolts 60 and nuts.

Description

The present invention relates to a method for fixing a grating attached to an opening of a concrete groove block used for drainage grooves such as side grooves and road crossing grooves, and a grating used in the method.

Concrete groove blocks used for drainage grooves are called, for example, U-shaped groove blocks disclosed in Patent Documents 1, 2 and 6, and disclosed in Patent Documents 3 to 5 and 6, for example. There is what is called a gradient variable block. In the U-shaped groove block, the side wall and the bottom wall are integrated, and the upper surface is open over the entire length of the block. On the other hand, in the gradient variable block, the side wall and the top wall are integrated, and a rectangular opening is provided in the central portion of the top wall. These blocks are connected in the longitudinal direction to form a water channel. The channel constructed by the gradient variable block has a bottom surface formed of cast concrete, and the gradient of the channel channel bottom surface can be different from the gradient of the top wall, that is, the ground surface. Therefore, if the drainage groove is constructed with a variable gradient block, there is no step between the road surface and the upper surface of the drainage groove.

A groove lid is attached to the opening of the concrete groove block used for the drainage groove. This groove lid includes a grating in which a concrete lid and a steel material are assembled in a lattice shape. In order to support these groove covers, a step (lid cover) is provided on the side of the opening of the groove block.

In the groove blocks disclosed in Patent Documents 1 to 5, the inner surface of the side wall is a vertical plane (mainly in the case of a variable gradient block) or an inclined plane in which the upper part of the water channel is widened (only in the case of a U-shaped groove block). The upper side of the inner surface of the side wall is cut into an L-shaped cross section to form a lid hook. Corresponding to the notch on the inner side, an outer flange protruding outward is provided to secure the width of the upper end of the side wall necessary for strength. On the other hand, in the groove block disclosed in FIG. 9 and FIG. 10 of Patent Document 6, the outer surface of the side wall is formed as a single vertical surface with no irregularities on the entire surface from the upper side to the lower side, and the cover hook projects inward from the upper part of the inner surface of the side wall. The lower surface of the inner flange is formed in an inclined plane in a direction in which the water channel width expands downward. The groove block disclosed in FIGS. 9 and 10 of Patent Document 6 can reduce the entire width of the groove block by the amount not having the outer flange as compared with the groove blocks disclosed in Patent Documents 1 to 5. In addition, as the upper end width of the groove block becomes narrower, the width and thickness of the groove block and the groove cover can also be reduced.

When the grating is mounted on a lid hook provided on the side of the opening of the concrete groove block used for the drainage groove, the grating may jump up when the vehicle travels on the lid.

In order to prevent the jumping of the grating, the grating is also fixed. Regarding fixing of the grating, Patent Document 5 provides a receiving frame having a rectangular planar shape composed of a raising material placed on each of the lids of the groove block and a connecting material for connecting each raising material at both ends thereof, After placing the grating body on the receiving frame attached to the lid of the groove block, connect the receiving frame and the grating body with bolts, and fix the receiving frame to the groove block with bolts to the receiving frame. A method is disclosed in which a projecting extending piece is locked to the top wall of a groove block or the lower surface of an adjacent concrete lid.

However, when the grating is locked to the lower surface of the top wall of the groove block, every time the grating tries to jump up, stress is concentrated on the side wall and the inner corner of the top wall to reduce the durability of the groove block. There is. On the other hand, if the grating is simply locked to the lower surface of the adjacent concrete lid, the grating and the adjacent concrete lid may be lifted on the lid hook and generate noise each time the grating tries to jump up. Such a problem may be particularly prominent in drainage grooves constructed with the groove blocks disclosed in FIGS. 9 and 10 of Patent Document 6.

In addition, the lid of the concrete groove block used for the drainage groove is disclosed in the case where it is formed in a horizontal plane as disclosed in Patent Documents 1 to 5, and in FIGS. 9 and 10 of Patent Document 6. Thus, it may be formed of an inclined surface (a flat surface or a curved surface) that is inclined in a direction that falls inward.

JP 2011-99237 A Utility Model Registration No. 3170759 JP 2009-228295 A JP2013-83043A JP 2007-177571 A JP 2011-174353 A

The present invention is a concrete groove block used for a drainage groove, having both side walls integrally connected by a top wall or a bottom wall and a lid hook provided inside the upper side of each side wall, and extending from the upper side to the lower side. A side wall outer surface formed entirely on a vertical surface without irregularities, and an inner flange formed by projecting the inner surface of the side wall inward to provide the lid hook, the lid hook is formed on the upper surface of the inner flange, A method capable of fixing the grating to the concrete groove block in which the lower surface of the inner flange is an inclined surface in a direction in which the channel width widens downward, without reducing the durability of the concrete groove block, and the method The object is to provide a grating for use in the method.

The invention according to claim 1 as a means for solving the above-mentioned problems has both side walls integrally connected by the top wall or the bottom wall and a lid hook provided on the inner side of the upper side of each side wall, and the entire surface from the upper side to the lower side. And an inner flange formed by projecting the inner surface of the side wall inward to provide the lid hook, and the lid hook is formed on the upper surface of the inner flange. The lower surface of the inner flange is a fixing method of the grating attached to the opening of the concrete groove block which is an inclined surface in the direction in which the water channel width expands downward, and the grating includes each of the grating main body and the lid hook Each raised material placed on the upper body is composed of a raised body integrally connected by a connecting material, and four side wall inner surface locking pieces, each of the raised members being each of the raised members. It is attached to the opening so as to be placed on the top, and the upper part of each side wall inner surface locking piece is fastened and fixed by first fastening means using bolts and nuts on the inner side surface on each end side of each raised material, By restraining the lower part of each side wall inner surface locking piece to the lower surface of the inner flange, the lifting of the raised body is restricted, and then the grating body is placed on the raised body to the opening. The mounting and the grating main body are fastened and fixed by second fastening means using bolts and nuts on the upper side surfaces at the respective end sides of the respective raising members.

The invention according to claim 2 is a grating used in the invention according to claim 1, wherein the grating main body and the raising body in which each raising material placed on each of the lid hooks is integrally connected by a connecting material, Each of the side wall inner surface locking pieces, and the raised body is attached to the opening so that each of the raised members is placed on each of the lid hooks. The upper side of the side wall inner surface locking piece is fastened and fixed by first fastening means using bolts and nuts on the inner side surface at each end side of each raised material, and the lower side of the side wall inner surface locking piece is the inner flange. The raising body is restrained from being lifted by this engagement, and the grating body is placed on the raising material and attached to the opening. Is characterized in being fastened respectively by the second fastening means grating body using bolts and nuts on the upper side at each end side of the respective raising member.

The invention according to claim 3 is the grating of the invention according to claim 2, wherein the raised body has two positions on the inner side surface where the raised members and the raised members are placed a predetermined distance inside from both ends. And a connecting material that is integrally connected to each other, and an attachment surface for each side wall inner surface locking piece is provided on the inner side surface on each end side of each of the raising materials.

The invention according to claim 4 is the grating of the invention according to claim 2 or 3, wherein the side wall inner surface locking piece is made of a metal plate bent in a cross-sectionally H-shape, and the inner side surface on each end side of the raised material is A vertical plate portion projecting downward from the inside and an inclined plate portion extending obliquely outward from the vertical plate portion are formed, and the lower surface of the inner flange is formed on the outer surface side of the inclined plate portion. A locking portion that is pressed against and locked from the inside is provided.

The invention according to claim 5 is the grating of the invention according to claim 2 or 3, wherein the side wall inner surface locking piece is made of a metal flat plate and protrudes downward from the inner side of the inner side surface at each end side of the raised material. The lower portion extends outward from the lower surface of the inner flange, and the lower portion is provided with a locking portion that presses and locks the lower surface of the inner flange from the inside.

The invention according to claim 6 is the grating of the invention according to claim 4 or 5, characterized in that the locking portion has a contact surface made of a curved surface that makes line contact with the lower surface of the inner flange. Is.

The invention according to claim 7 is the grating according to any one of claims 2 to 6, wherein a spacer is provided on an upper outer surface of each side wall inner surface locking piece, and each side wall inner surface is sandwiched between the spacers. The upper part of the locking piece is fastened and fixed to the inner side surface on each end side of each raising member.

According to the first and second aspects of the present invention, for example, the four corners of the grating are locked to the lower surface of the inner flange of the groove block by the four side wall inner locking pieces, and the jumping of the grating is prevented by this locking. It becomes like this. And when the grating is going to jump up, it takes over the load that lifts the grating across the both side walls of the groove block, so it is possible to avoid concentrating the stress locally on the groove block and reducing the durability of the groove block. it can. In addition, since the grating is not locked to the lower surface of the adjacent concrete lid, it is possible to prevent the grating and the adjacent concrete lid from lifting up and generating noise each time the grating tries to jump up, The jumping of the grating can be prevented even in the drainage groove where the grating is installed continuously without a gap. Furthermore, since the grating has its four corners locked to the lower surface of the inner flange of the groove block by four side wall inner locking pieces, the grating can be stably attached and fixed to the opening of the groove block, The fixing strength can also be improved.

According to the grating of the invention according to claim 3, when the raised body is attached to the opening of the groove block, the connecting member plays the role of the handle of the raised body, and the attaching work of the raised body can be easily performed.

According to the grating of the invention according to claim 4 or 5, a side wall inner surface locking piece for locking, for example, the four corners of the grating to the lower surface of the inner flange of the groove block can be obtained at low cost.

According to the grating of the invention according to claim 6, even if the locking portion of the side wall inner surface locking piece is strongly pressed against the lower surface of the inner flange of the groove block, the damage to the concrete is reduced and the deterioration of the concrete is suppressed. Can do.

According to the grating of the invention according to claim 7, variations in product dimensions of the grating and the groove block are caused between the upper outer surface of each side wall inner surface locking piece and the inner side surface at each end side of each raising material by the spacer. Each side wall inner surface locking piece can be attached without absorbing each side wall inner surface locking piece against the inner end surface of the inner flange, and the function of preventing the jumping of the grating can be exhibited.

It is a perspective view of a gradient variable block. (A) is the sectional view on the AA line of FIG. 1, (B) is the sectional view on the BB line of FIG. It is a perspective view of a U-shaped groove block. FIG. 4 is a sectional view taken along line AA in FIG. 3. It is a disassembled perspective view explaining attachment of the grating to a groove block. It is a top view of the grating attached to the opening part of a groove block. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is a top view of the raising body attached to the opening part of a groove block. (A) is sectional drawing in the AA line part of FIG. 9 which shows the state which put the raising body on the cover of a groove block, (B) is AA sectional view taken on the line of FIG. FIG. 8 is a diagram corresponding to FIG. FIG. 8 is a diagram corresponding to FIG. FIG. 8 is a diagram corresponding to FIG. FIG. 8 is a diagram corresponding to FIG. 7 illustrating a reference example.

Hereinafter, grating according to an embodiment of the present invention will be described with reference to the drawings.

1 to 4 show a concrete groove block used for drainage grooves. 1 is a perspective view of the gradient variable block, FIG. 2A is a cross-sectional view taken along line AA in FIG. 1, and FIG. 2B is a cross-sectional view taken along line BB in FIG. 3 is a perspective view of the U-shaped groove block, and FIG. 4 is a cross-sectional view taken along line AA of FIG.

The gradient variable block 1a includes two side walls 2 and 2 and a top wall 3a connecting the upper sides thereof, and a rectangular opening 4 is provided at the center of the top wall 3a. Lid hooks 5 are formed on both sides of the opening 4. The two side walls 2 and 2 and the top wall 3a are integrally formed, and the lid hook 5 is formed on the upper surface of the inner flange 6 provided on the inner surface of the side wall of the portion where the opening 4 is provided. As for the outer surface 8 of the side wall, the entire surface from the upper side to the lower side is formed as a single vertical surface having no irregularities.

The U-shaped groove block 1b is integrally formed with two side walls 2 and 2 whose outer surface 8 is an entire vertical surface with no irregularities from the upper side to the lower side, and a bottom wall 3b connecting the lower side. An inner flange 6 having a lid hook 5 is formed on both inner sides above the side wall.

The lid hooks 5 of both (the variable gradient block and the U-shaped groove block) are formed on an inclined plane in a direction that descends toward the inside of the water channel. Further, it may be a curved surface inclined in the same direction or a non-inclined horizontal plane. The inner flange 6 protrudes inward, and the thickness of the side wall of the portion is increased, and the lower surface 7 of the inner flange is formed in an inclined plane in a direction in which the water channel width expands downward.

Both can reduce the width W of the groove block by the amount not having the outer flange, and the width W and thickness of the groove block, specifically, the side wall thickness T1 as the upper end width of the groove block becomes narrower. Also, the top wall thickness T2 (in the case of the variable gradient block) and the bottom wall thickness T3 (in the case of the U-shaped groove block) can be reduced. 1 and 3 indicates a groove width (water channel width).

FIG. 5 is an exploded perspective view for explaining the attachment of the grating to the groove block. 6 to 8 show the grating attached to the opening of the groove block. 6 is a plan view thereof, FIG. 7 is a sectional view taken along line AA in FIG. 6, and FIG. 8 is a sectional view taken along line BB in FIG. A gradient variable block 1a is shown as a groove block.

As shown in FIGS. 5 to 8, the grating 10 </ b> A mainly includes a grating main body 20, a raised body 30, and four side wall inner surface locking pieces 40 </ b> A.

The grating body 20 is configured by a main bar 21, a cross bar 22, and an end plate 23 assembled in a lattice pattern. Mounting seats 24 are provided at the four corners of the grating main body 20, and bolt mounting holes (not shown) are provided in the mounting seat 24.

FIG. 9 and FIG. 10B show a raised body attached to the opening of the groove block. 9 is a plan view, and FIG. 10B is a cross-sectional view taken along line AA of FIG. FIG. 10A is a cross-sectional view taken along the line AA of FIG. 9 showing a state in which a raised body is placed on the cover of the groove block.

The raising body 30 is composed of a raising material 31 composed of square pipes placed on each of the lid hooks 5 of the gradient variable block 1a, and a connecting material 32 that integrally connects the raising materials 31. The raising member 31 is formed by integrating two angle members into a square pipe shape by welding. The lower surface 33 of the raising material is formed in an inclined plane along the flat cover hook 5 inclined in a direction descending toward the inner side of the water channel. This inclined plane also corresponds to the case where the lid hook 5 is a curved surface. When the lid hook 5 is a horizontal plane, the lower surface 33 of the raising material is also formed on the horizontal plane. The raising material 31 and the connecting material 32 are fixed by welding. The connecting member 32 is made of an angle member, and is used with the outer surface corner portion facing upward. The connecting member 32 connects the raising member 31 at two positions that enter the inside by a predetermined distance from both ends of the raising member 31, whereby the raising member 30 is connected to each end of each raising member 31 outside the connecting member 32. The four side attachment surfaces 34 of the side wall inner surface locking pieces 40A are formed by the inner side surface on the side. Each mounting surface 34 is provided with two bolt through holes 35 arranged side by side, and nuts 36 for fixing the side wall inner surface locking pieces are welded to the inner side of the bolt through holes 35 by welding. It is fixed. Further, one bolt through hole 37 is also provided on the upper side surface at each end side of each raising member 31, and a nut 38 for fixing the grating main body is fixed to the inner back side by welding. In addition, an integrally formed square pipe material can be used for the raising material 31, and for the connecting material 32, in addition to an angle material, for example, an integrally formed square or round pipe material or a U-shaped steel material can be used. .

One side wall inner locking piece 40A is attached to each mounting surface 34 of the raising body 30 attached to the opening 4 of the gradient variable block 1a, and is locked to the lower surface 7 of the inner flange of the gradient variable block 1a. The raised body 30 and the gradient variable block 1a are fixed to restrict the lifting of the raised body 30, and finally the four corners of the grating 10A attached to the opening 4 of the gradient variable block 1a are connected to the inner flanges of the gradient variable block 1a. By engaging with the lower surface 7, the grating 10A and the variable gradient block 1a are fixed, and the jumping of the grating 10A is prevented. This side wall inner surface locking piece 40A is made of a metal plate obtained by bending a vertically long rectangular metal flat plate obtained in an inexpensive shape into a U-shaped cross section, and is used in a state in which the concave side surface faces the side wall inner surface of the gradient variable block 1a. The The side wall inner surface locking piece 40A has a vertical plate portion 41 projecting downward from the inside of the mounting surface 34 and an inclined plate portion 42 extending obliquely outward from the vertical plate portion 41 downward. Is formed. Two bolt through holes 43 corresponding to the bolt through holes 35 provided in the attachment surface 34 are arranged side by side at the upper part of the vertical plate portion 41. A spacer 44 for providing a gap between the mounting surface 34 and the vertical plate portion 41 is provided over the entire width of the side wall inner surface locking piece 40A on the outer surface of the upper end portion of the vertical plate portion 41 further above the bolt through hole 43. It has been. The spacer 44 is made of a square bar having a square cross section made of metal, and is fixed to the vertical plate portion 41 by welding. On the other hand, on the outer surface of the distal end portion of the inclined plate portion 42, a locking portion 45 is provided over the entire width of the side wall inner surface locking piece 40A for pressing against the lower surface 7 of the inner flange of the variable gradient block 1a from the inside. Yes. The locking portion 45 is made of a round bar having a circular cross section and is fixed to the inclined plate portion 42 by welding. Moreover, the latching | locking part 45 has the contact surface 46 which consists of a curved surface which carries out a line contact with the lower surface 7 of the inner flange of the gradient variable block 1a. The locking portion 45 made of a round bar has a cylindrical surface serving as a contact surface 46.

And the grating 10A connects and fixes the eight bolts 50 for fixing the side wall inner surface locking pieces and the height raising body 30 and the grating body 20 for connecting and fixing the raised body 30 and the side wall inner surface locking pieces 40A. 4 bolts for fixing the grating main body for four corners are provided, and components (grating main body 20, raised body 30, four side wall inner surface locking pieces 40A) are provided at the opening 4 of the variable gradient block 1a. Are assembled and attached to the opening 4 of the gradient variable block 1a, the grating 10A and the gradient variable block 1a are fixed, and the jumping of the grating 10A is prevented.

Assembling and attaching the grating 10A, first, as shown in FIG. 10 (A), the raising body 30 is placed so that each raising member 31 is placed on each of the lid hooks 5 of the gradient variable block 1a. It is attached to the opening 4 of the variable block 1a. Next, the bolt through hole 43 provided in one side wall inner surface locking piece 40A is opposed to the bolt through hole 35 provided in the attachment surface 34 on the left front side of the raised body 30 in FIG. The male screw shafts are passed through the bolt through holes 43 and 35 in this order and screwed onto the nut 36, and the upper part of one side wall inner surface locking piece 40A is fastened and fixed to the left front mounting surface 34 of the raised body 30. Similarly, the remaining three side wall inner surface locking pieces 40A are also fastened and fixed one by one to the remaining three attachment surfaces 34 of the raised body 30, as shown in FIGS. 9 and 10B. By lifting the lower portions of all four side wall inner surface locking pieces 40A to the lower surface 7 of the inner flange of the variable gradient block 1a, the raised body 30 and the variable gradient block 1a are fixed, and the raised body 30 is lifted. The Control to. Next, as shown in FIGS. 6 to 8, the grating body 20 is placed on the raising body 30 such that the end of each main bar 21 is placed on each raising member 31 of the raising body 30. Are attached to the opening 4 of the gradient variable block 1a, and finally the male screw shafts of the bolts 60 are bolt through holes provided in the mounting seats 24 at the four corners of the grating body 20, and the raising members 31 that are directly opposite to each other. The bolt through holes 37 provided on the upper side surface on each end side are passed through in order and screwed onto the nut 38, and the four corners of the grating body 20 are fastened and fixed to the upper side surface on each end side of each raising member 31.

Thus, the grating 10A is assembled at the opening 4 of the gradient variable block 1a, the grating 10A is attached to the opening 4 of the gradient variable block 1a, and its four corners are locked to the lower surface 7 of the inner flange of the gradient variable block 1a. The grating 10A and the gradient variable block 1a are fixed, and the jumping of the grating 10A is prevented.

FIG. 11 is a view corresponding to FIG. The only difference between the grating 10B of the second embodiment and the grating 10A of the first embodiment is the structure of the side wall inner surface locking pieces. The side wall inner surface locking piece 40B of the second embodiment is made of a vertically long rectangular metal flat plate that can be obtained at a low cost, protrudes downward from the inside of the mounting surface 34, and the lower portion extends to the outside of the lower surface 7 of the inner flange. A locking portion 45 having a contact surface 46 is provided on the outer surface of the lower end portion. On the other hand, the spacer 44a provided on the outer surface of the upper end portion of the side wall inner surface locking piece 40B is made of a round bar having a circular cross section made of metal, and has a contact surface 47 formed of a curved surface in line contact with the mounting surface 34 by its cylindrical surface. ing. The spacer 44a is formed of a square bar, and the tightening load of the bolt 50 is more easily transmitted to the locking portion 45 via the side wall inner surface locking piece 40B, as compared with the spacer 44 which is in surface contact with the mounting surface 34.

FIG. 12 is a view corresponding to FIG. The difference between the grating 10C of the third embodiment and the grating 10A of the first embodiment is also the structure of the side wall inner surface locking piece. The side wall inner surface locking piece 40C according to the third embodiment has a bent shape in which the locking portion 45a having the contact surface 46 is bent in an arc shape so that the front end portion of the inclined plate portion 42 is convex and the inner surface is concave. Thus, the outer surface of the bent portion is a contact surface. The side wall inner surface locking piece 40C is integrally formed with a locking portion 45a having a contact surface 46 only in the bent shape of the metal plate constituting the side wall inner surface locking piece 40C.

FIG. 13 is a view corresponding to FIG. The difference between the grating 10D of the fourth embodiment and the grating 10A of the first embodiment is also the structure of the side wall inner surface locking pieces. The side wall inner surface locking piece 40D of the fourth embodiment has a curled bending shape in which the locking portion 45b having the contact surface 46 is curled so that the tip end portion of the inclined plate portion 42 projects outward, and the bent portion thereof. The outer surface of is a contact surface. The side wall inner surface locking piece 40D is also integrally formed with a locking portion 45b having a contact surface 46 only in the bent shape of the metal plate constituting the side wall inner surface locking piece 40D.

[Reference Example] FIG. 14 is a view corresponding to FIG. 7 showing a reference example. The difference between the grating 10E of the reference example and the grating 10A of the first embodiment is also the structure of the side wall inner surface locking pieces. The spacer 44 and the locking part 45 are not provided on the side wall inner surface locking piece 40E of the reference example. Therefore, the side wall inner locking piece 40E is fastened and fixed in a state where the upper outer surface of the vertical plate portion 41 is joined to the mounting surface 34, and the outer surface of the tip portion of the inclined plate portion 42 is in surface contact with the lower surface 7 of the inner flange of the variable gradient block 1a. It has a simple structure that is locked in the joined state.

Instead of the raising body 30 in Examples 1 to 4 and the reference example, a raising body having a rectangular shape in a plan view in which the raising material is integrally connected by connecting members at both ends thereof is provided inside each of the connecting members of the raising body. You may form the attachment surface of 4 surfaces for 4 sheets of side wall inner surface locking piece 40A with the inner side surface in each edge side of each raising material.

DESCRIPTION OF SYMBOLS 1a Gradient variable block (groove block) 1b U-shaped groove block (groove block) 2 Side wall 3a Top wall 3b Bottom wall 4 Opening part 5 Lid 6 Inner flange 7 Lower surface of inner flange 8 Outer surface of side wall 10A Grating 20 Grating body 30 Raising Body 31 Raising material 32 Connecting material 34 Mounting surface 36, 38 Nut 40A Side wall inner surface locking piece 41 Vertical plate portion 42 Inclined plate portion 44 Spacer 45 Locking portion 46 Contact surface 50, 60 Bolt

Claims (7)

Side wall outer surfaces having both side walls integrally connected by a top wall or a bottom wall and a lid hook provided inside the upper side of each side wall, the entire surface from the upper side to the lower side being formed as a vertical surface without irregularities, and the lid An inner flange formed by projecting the inner surface of the side wall inward to provide a hook, the lid hook is formed on the upper surface of the inner flange, and the lower surface of the inner flange has a direction in which the width of the water channel extends downward. A method of fixing a grating to be attached to an opening of a concrete groove block that is an inclined surface, wherein the grating main body and each raising material placed on each of the lid hooks are integrally connected by a connecting material. The raised body and four side wall inner surface locking pieces, and the raised body is attached to the opening so that each raised member is placed on each of the lid hooks, The upper portions of the side wall inner surface locking pieces are fastened and fixed to the inner side surfaces on the respective end sides of the raised members by first fastening means using bolts and nuts, and the lower portions of the side wall inner surface locking pieces are fixed to the lower surface of the inner flange. The raising of the raised body is regulated by locking each of the raised body, and then the grating main body is mounted on the raised body on the raised body, and the grating main body is attached to each end of each raised member. A fixing method of the grating to the groove block, wherein the fixing is performed by second fastening means using bolts and nuts on the upper side surface. A grating used in the fixing method for a grating according to claim 1, wherein the grating body, each raised member placed on each of the lid hooks are integrally connected by a connecting member, and four side walls An inner surface locking piece, and the raised body is attached to the opening so that each raised material is placed on each of the lid hooks. The upper part of the inner surface locking piece is fastened and fixed to the inner side surface on each end side of each raised member by first fastening means using bolts and nuts, and the lower part of the side wall inner locking piece is fixed to the lower surface of the inner flange, respectively. The lifting body is lifted by this locking, and the grating main body is mounted on the opening and mounted on each of the lifting members. Grating the grating material body, characterized in that it is fastened respectively by second fastening means using a bolt and a nut on the upper side at each end side of the respective raising member. The raised body includes the raised members and a connecting material that integrally connects the raised members at two positions on the inner side surface that enter the longitudinal direction from the both ends of the raised members. The grating according to claim 2, wherein a mounting surface for each of the side wall inner surface locking pieces is provided on an inner side surface at each end side of the material. The side wall inner surface locking piece is made of a metal plate bent in a cross-sectionally H-shape, and includes a vertical plate portion that protrudes downward from the inner side surface at each end of the raised material, and a downward direction from the vertical plate portion. And an inclined plate portion that is inclined and extended outward, and a locking portion is provided on the outer surface side of the inclined plate portion to be pressed against the lower surface of the inner flange from the inner side to be locked. The grating according to claim 2 or 3. The side wall inner surface locking piece is made of a metal flat plate, protrudes downward from the inside of the inner side surface at each end side of the raised material, and the lower portion extends to the lower surface outer side of the inner flange, The grating according to claim 2 or 3, wherein a locking portion that is pressed and locked from the inside to the lower surface of the inner flange is provided. The grating according to claim 4 or 5, wherein the locking portion has a contact surface that is a curved surface that makes line contact with the lower surface of the inner flange.   A spacer is provided on the upper outer surface of each side wall inner surface locking piece, and the upper portion of each side wall inner surface locking piece is clamped and fixed to the inner side surface on each end side of each raised material with the spacer interposed therebetween. The grating according to any one of claims 2 to 6, wherein:

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