JP2015055036A - 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, and respective side wall inner surface lock pieces 40A of respective side wall inner surface lock tools 50 have their upper parts locked to inner side faces on respective end sides of the respective raising materials 31 through a guide pin 43 and a guide hole 35 and then pressed against the respective rising materials 31 from inside by extending a turnbuckle 51, and then have their lower parts pressed from inside against and locked to a lower surface 7 of an inner flange of the ditch block 1a. The respective side wall inner surface lock tools 50 are fixed as props between inner surfaces of both side walls 2, 2, then a grating body 20 is fitted to the opening part 4 of the ditch block 1a, and the grating body 20 is fastened and fixed to the respective raising materials 31 with 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 Two raised side walls in which each raised material placed on the upper body is integrally connected by a connecting material, and two side wall inner surface locking pieces are integrally connected to each other by a turnbuckle so as to be able to approach and separate from each other. A plurality of guide pins projecting on one of a surface locking tool, an upper outer surface of the side wall inner surface locking piece, and an inner side surface on each end side of each raised material, and the guide pins inserted on the other side A plurality of guide holes, and the raised body is attached to the opening so that each raised member is placed on each of the lid hooks, The upper portion of each side wall inner surface locking piece is locked to the inner side surface on each end side of each of the raised materials through the guide pin and the guide hole, and the upper portion of each side wall inner surface locking piece is the each raised material. The inner wall of each side wall is opposed to the inner side surface, and the lower part of each side wall inner surface locking piece is opposed to the inner flange so that the turnbuckle is extended after being mounted between the inner surfaces of the both side walls. Each side wall The surface locking pieces are separated from each other, the upper part of each side wall inner surface locking piece is pressed against the inner side surface on each end side of each raising member from the inside, and the lower part of each side wall inner surface locking piece is The bottom surface of the flange is pressed and locked from the inside, and each side wall inner surface locking tool is stretched and fixed between the inner surfaces of the both side walls to regulate the lifting of the raised body, and then the grating body On the raised body and attached to the opening, and the grating main body is fastened and fixed to the upper side surface at each end of each raised material by fastening means using bolts and nuts. .

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, Two side wall inner surface locking pieces integrally connected to each other by a turnbuckle so as to be able to approach and separate from each other, an upper outer surface of each of the side wall inner surface locking pieces, and each of the raising members It is composed of a plurality of guide pins projecting on either one of the inner side surfaces on each end side, and a plurality of guide holes opened on the other side to insert the guide pins, and the raised body includes the raised members. It is attached to the opening so as to be placed on each of the lid hooks, and each of the side wall inner surface locking tools has an upper portion of each side wall inner surface locking piece via the guide pin and the guide hole. Each bulk It is locked to the inner side surface on each end side of the brazing material, the upper part of each side wall inner surface locking piece is opposed to the inner side surface on each end side of each raised material, and the lower part of each side wall inner surface locking piece is the above described The side wall inner surface locking pieces are separated from each other by the extension of the turnbuckle from the mounting state where the inner surface of the both side walls faces the inner flange, and the upper portions of the side wall inner surface locking pieces are Each of the raised members is pressed against the inner side surface at each end side from the inside, and the lower portion of each side wall inner surface locking piece is pressed against the lower surface of the inner flange from the inner side to be locked. In this fixed state, the lifting of the raised body is restricted, and the grating main body is placed on each raised material and attached to the opening. , It is characterized in that the grating body is tightened and fixed by fastening means using a bolt and a nut 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 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 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 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 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 of the invention according to any one of claims 2 to 6, wherein a spacer is provided on the upper outer surface of the side wall inner surface locking piece, and in the fixed state of each side wall inner surface locking tool, The upper part of each side wall inner surface locking piece is pressed from the inner side to the inner side surface on each end side of each raising member with the spacer interposed therebetween.

According to the first and second aspects of the 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 side wall inner surface locking pieces of each of the two sets of side wall inner surface locking tools. This prevents the jumping of the grating. And when the grating tries to jump up, it takes over the load that lifts the grating on both side walls of the groove block, so it is possible to avoid reducing the durability of the groove block by locally concentrating the stress on 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. Further, since the grating has, for example, four corners locked to the lower surface of the inner flange of the groove block by the respective side wall inner surface locking pieces of the two sets of side wall inner surface locking tools, the grating is stably formed in the opening of the groove block. The fixing strength can be improved as well as the fixing. In addition, the side wall inner surface locking tool can be easily obtained by simply inserting each guide pin protruding from the upper outer surface of each side wall inner surface locking piece into a guide hole formed on the inner side surface on each end side of each raising member. Since it can be mounted and the mounted state is maintained even if the hand is released from the side wall inner surface locking device, the side wall inner surface locking device can be simply extended from the mounted state by using a tool such as a wrench. Can be easily fixed, and the attachment work of the side wall inner surface stopper can be easily performed. And the side wall inner surface locking tool eliminates the bolt fixing of the fixing bracket (in this invention, four side wall inner surface locking pieces) for preventing the jumping of the grating, so that the number of parts of the grating, the number of installation steps on the site (labor) And time).

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, the product dimensions of the grating and the groove block are varied 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 surely exhibited. it can.

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. 9A is a cross-sectional view taken along the line AA in FIG. 9 showing a state in which a raised body is placed on the lid of the groove block, and FIG. 9B is a state in which the side wall inner surface fastener is mounted in the state of FIG. 9 is a cross-sectional view taken along line AA in FIG. 9, and FIG. 9C is a cross-sectional view taken along line AA in FIG. 9. 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 two sets of side wall inner surface locking tools 50.

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. 10 (C) show the raised body attached to the opening of the groove block. 9 is a plan view, and FIG. 10C 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. FIG. 10B is a cross-sectional view taken along the line AA of FIG. 9 showing a state in which the side wall inner surface fastener is mounted in the state of FIG.

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. Four mounting surfaces 34 for four side wall inner surface locking pieces 40A described later are formed by the inner side surface on the side. Each mounting surface 34 is provided with two guide holes 35 arranged side by side. Further, one bolt through hole 37 is provided on the upper side surface on 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. .

The side wall inner surface locking tool 50 is formed by integrally connecting two side wall inner surface locking pieces 40 </ b> A and 40 </ b> A so that they can be approached and separated from each other by a single turnbuckle 51.

  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. The side wall inner surface locking piece 40A is made of a vertically long rectangular metal flat plate that is obtained at a low cost, protrudes downward from the inner side of the mounting surface 34, and the lower part extends to the outer side of the lower surface of the inner flange. Two guide pins 43 to be inserted into the guide holes 35 provided on the attachment surface 34 are arranged side by side and protruded on the outer surface of the upper end portion of the side wall inner surface locking piece 40A. Immediately below the guide pin 43, a spacer 44 is provided over the entire width of the side wall inner surface locking piece 40A for providing a gap between the mounting surface 34 and the side wall inner surface locking piece 40A. This spacer 44 is made of a round bar having a circular cross section made of metal, and is fixed to the side wall inner surface locking piece 40A by welding. On the other hand, on the outer surface of the lower end portion of the side wall inner surface locking piece 40A, 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 gradient variable block 1a from the inside. It has been. The locking portion 45 is made of a round bar having a circular cross section, and is fixed to the side wall inner surface locking piece 40A 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.

The turnbuckle 51 is composed of a trunk 52 made of a round pipe and two bolts 53. At the center of the barrel 52, a square portion 52a is formed which is processed into a square cross section and on which a tool such as a spanner is applied. The inner surface of the cylindrical part 52b on both sides of the square part 52a is threaded, one being a right-hand thread and the other being a left-hand thread (reverse thread). Bolts 53 are attached to the cylindrical portions 52b on both sides, respectively, and the inner surface central portion of the side wall inner surface locking piece 40A is fixed to the tip of each bolt 53 by welding. The side wall inner surface locking pieces 40A, 40A can be moved toward and away from each other.

The grating 10A includes four grating body fixing bolts 60 for connecting and fixing the raised body 30 and the grating body 20, and a component (grating body) is provided at the opening 4 of the gradient variable block 1a. 20, the raised body 30, two sets of side wall inner surface fasteners 50) are assembled and attached to the opening 4 of the gradient variable block 1a, so that the grating 10A and the gradient variable block 1a are fixed, and the jumping of the grating 10A is prevented. Is.

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, two guide pins 43 provided on the side wall inner surface locking piece 40A on one side of the pair of side wall inner surface locking tools 50 are provided, for example, on the right front mounting surface 34 in FIG. After the upper portion of one side wall inner surface locking piece 40A is locked to the mounting surface 34 on the right front side in FIG. 5, two pieces provided on the opposite side wall inner surface locking piece 40A are inserted. 5 is inserted into two guide holes 35 provided on the left front mounting surface 34 in FIG. 5, and the upper portion of the opposite side wall inner surface locking piece 40A is attached to the left front mounting surface 34 in FIG. The pair of side wall inner surface locking members 50 are locked, and the upper portions of the side wall inner surface locking pieces 40A on both sides face the mounting surface 34, and the lower portions of the side wall inner surface locking pieces 40A on the both sides are respectively variable gradient blocks 1a. Both sides of the variable gradient block 1a so as to face the inner flange 6 After mounting between the two inner surfaces, the turnbuckle 51 is extended so that the side wall inner surface locking pieces 40A are separated from each other, and the upper portions of both side wall inner surface locking pieces 40A are pushed onto the mounting surface 34 from the inner side. At the same time, the lower portions of the side wall inner surface locking pieces 40A on both sides are pressed against the lower surface 7 of the inner flange of the variable gradient block 1a from the inner side to lock one set of side wall inner surface locking tools 50 on both sides of the variable gradient block 1a. Stretch and fix between the inner surfaces of the walls 2 and 2.

Further, the two guide pins 43 provided on the side wall inner surface locking piece 40A on one side of the remaining set of side wall inner surface locking tools 50 are, for example, two pieces provided on the right rear mounting surface 34 in FIG. After inserting into the guide hole 35 and locking the upper part of the side wall inner surface locking piece 40A on one side to the mounting surface 34 on the right rear side in FIG. 5, the two provided on the side wall inner surface locking piece 40A on the opposite side 5 is inserted into the two guide holes 35 provided on the left rear mounting surface 34 in FIG. 5, and the upper portion of the opposite side wall inner surface locking piece 40A is attached to the left rear mounting surface in FIG. 34, and the upper set of the side wall inner surface locking pieces 40A on both sides faces the mounting surface 34, and the lower side of the side wall inner surface locking pieces 40A on both sides is inclined. The gradient variable block 1a is arranged so as to face the inner flange 6 of the variable block 1a. After mounting between the inner surfaces of the side walls 2 and 2, the turnbuckle 51 is extended to separate the side wall inner surface locking pieces 40 </ b> A from each other, and the upper portions of both side wall inner surface locking pieces 40 </ b> A are attached to the mounting surface 34 from the inside. While pressing, the lower portions of the side wall inner surface locking pieces 40A on both sides are pressed and locked to the lower surface 7 of the inner flange of the variable gradient block 1a from the inside, and the remaining one set of side wall inner surface locking tools 50 are fixed to both side walls 2, Stretch and fix between the two inner surfaces.

Thus, as shown in FIGS. 9 and 10C, the upper portions of all four side wall inner surface locking pieces 40A are attached to all four mounting surfaces 34 of the raising body 30, and all four side wall inner surface locking members are locked. By locking the lower part of the piece 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 lifting of the raised body 30 is restricted.

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

By the way, when the raised body 30 is attached to the opening 4 of the variable gradient block 1a, even if the raised body 30 is displaced in the groove width direction as shown in FIG. The deviation can be eliminated by the core function, and the raised body 30 can be fixed to the gradient variable block 1a. That is, when the raised body 30 is shifted to the right side as shown in FIG. 10 (A), the side wall inner surface locking tool 50 is left when the turnbuckle 50 is extended from the mounted state shown in FIG. 10 (B). While the raised body 30 is pushed and moved to the left side by the side wall inner surface locking piece 40A, as shown in FIG. 10 (C), it is in a fixed state where it is stretched and fixed between the inner surfaces of both side walls 2 and 2 of the gradient variable block 1a. On the contrary, when the raised body 30 is shifted to the left side, the side wall inner surface locking tool 50 pushes the raised body 30 rightward by the right side wall inner surface locking piece 40A when the turnbuckle 50 is extended from the mounted state. While being moved, as shown in FIG. 10 (C), a fixed state is achieved in which it is stretched and fixed between the inner surfaces of the side walls 2 and 2 of the gradient variable block 1a.

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 formed of a metal plate obtained by bending a vertically long rectangular metal flat plate obtained in an inexpensive shape into a cross-sectional shape, and a vertical plate portion 41 protruding downward from the inside of the mounting surface 34. In addition, an inclined plate portion 42 that is inclined and extended outward from the vertical plate portion 41 is formed.

FIG. 12 is a view corresponding to FIG. The grating 10C of the third embodiment is different from the grating 10A of the first embodiment in the structure of the side wall inner surface locking piece. The side wall inner surface locking piece 40C of the third embodiment is made of a metal plate obtained by bending a vertically long rectangular metal flat plate obtained in an inexpensive manner into a cross-sectional shape and has a vertical plate portion 41 protruding downward from the inside of the mounting surface 34. In addition, an inclined plate portion 42 that is inclined and extended outward from the vertical plate portion 41 is formed. The locking portion 45a having the contact surface 46 has a bent shape in which the tip portion of the inclined plate portion 42 is bent in an arc shape so that the outer surface is convex and the inner surface is concave, and the outer surface of the bent portion is the contact surface. It has become. 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 the structure of the side wall inner surface locking piece. The side wall inner surface locking piece 40D of Example 4 has a curled bent shape in which the locking portion 45b having the contact surface 46 is curled and bent so that the lower end portion of the side wall inner surface locking piece 40D projects outward. The outer surface of the bent part is a contact surface. The side wall inner surface locking piece 40D is 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 grating 10E of the reference example is different from the grating 10A of the first embodiment in the structure of the side wall inner surface locking piece. The side wall inner surface locking piece 40E of the reference example is made of a metal plate obtained by bending a vertically long rectangular metal flat plate obtained in an inexpensive shape into a cross-sectional shape, a vertical plate portion 41 protruding downward from the inside of the mounting surface 34, and its An inclined plate portion 42 that is inclined and extended outward from the vertical plate portion 41 is formed. The inclined plate portion 42 is not provided with a locking portion 45. Therefore, the outer surface of the tip end portion of the inclined plate portion 42 is locked in a state of being joined to the lower surface 7 of the inner flange of the variable gradient block 1a by surface contact.

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 35 Guide hole 38 Nut 40A Side wall inner surface locking piece 41 Vertical plate portion 42 Inclined plate portion 43 Guide pin 44 Spacer 45 Locking portion 46 Contact surface 50 Side wall inner surface locking device 51 Turnbuckle 60 volts

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. A pair of side wall inner surface locking members integrally connected to each other by a turnbuckle so as to be able to approach and separate from each other, an upper outer surface of the side wall inner surface locking piece, It is composed of a plurality of guide pins projecting on either one of the inner side surfaces on each end side of the raising material, and a plurality of guide holes that are opened on the other side and into which the guide pins are inserted. A material is mounted on each of the lid hooks so that the material is placed on each of the lid hooks, and each of the side wall inner surface locking tools is attached to the upper portion of each of the side wall inner surface locking pieces with the guide pin and the guide hole. And the upper side of each side wall inner surface locking piece is opposed to the inner side surface on each end side of each said raising material, and each said side wall inner surface locking piece The lower side of the side wall is mounted between the inner surfaces of the side walls so as to face the inner flange, and then the turnbuckles are extended to separate the side wall inner surface locking pieces from each other. Fragment The upper part is pressed against the inner side surface at each end side of each raised material from the inside, and the lower part of each side wall inner surface locking piece is pressed against the lower surface of the inner flange from the inner side to be locked. By restricting each of the stoppers between the inner surfaces of the both side walls, the lifting of the raised body is restricted, and then the grating main body is placed on the raised body and attached to the opening. The fixing method of the grating to the groove block is characterized in that the fastening is performed by fastening means using bolts and nuts on the upper side surface at each end side of each raised material. A grating used in the method of fixing a grating according to claim 1, wherein the grating body, the raised body on which each raised material placed on each of the lid hooks is integrally connected by a connecting material, and two side walls Two sets of side wall inner surface fasteners in which inner surface locking pieces are integrally connected to each other by turnbuckles so as to be able to approach and separate from each other, upper outer surfaces of the respective side wall inner surface locking pieces, and each end side of each raised material It comprises a plurality of guide pins projecting on either one of the inner side surfaces and a plurality of guide holes opened on the other side to insert the guide pins. Each side wall inner surface locking tool is mounted on the opening so as to be placed on each of the upper surfaces of the side wall inner surface locking pieces. Up It is locked to the inner side surface on each end side of the material, the upper portion of each side wall inner surface locking piece faces the inner side surface on each end side of each raised material, and the lower part of each side wall inner surface locking piece is the inner side The side wall inner surface locking pieces are separated from each other by the extension of the turnbuckle from the mounting state that is mounted between the inner surfaces of the both side walls facing the flange, and the upper portions of the side wall inner surface locking pieces are While pressing against the inner side surface on each end side of each raising member from the inside, the lower part of each side wall inner surface locking piece is pressed against the lower surface of the inner flange from the inner side and locked between the inner surfaces of the both side walls. In the fixed state, the lifting of the raised body is restricted, and the grating main body is placed on each raised member and attached to the opening. Grating, characterized in that the grating body is tightened and fixed by fastening means using a bolt and a nut on the upper side at each end side of the respective raising member. The raised body is composed of the raised members, and connecting members that integrally connect the raised members at two positions on the inner side surface that enter a predetermined distance from 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 on each end side. 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 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 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 the side wall inner surface locking piece, and in the fixed state of each side wall inner surface locking tool, the upper side of each side wall inner surface locking piece sandwiches the spacer and each end side of each raised material The grating according to any one of claims 2 to 6, wherein the grating is pressed against the inner side surface of the inner wall from the inside.

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