JP6196033B2 - Grating fixing structure - Google Patents

Description

  The present invention relates to a fixing structure for a grating in which the grating is mounted and fixed on a receiving frame provided in an upper portion of a draining groove.

  Patent Document 1 below describes a fixing structure for grating. The grating fixing structure of Patent Document 1 includes a grating in which a plurality of bearing bars extending in the width direction of the grooves arranged in parallel to each other with a predetermined interval in the direction along the grooves are connected by a connecting bar extending in a direction intersecting these. It fixes to the receiving frame provided in the upper part of the groove | channel for drainage. At the corner of the grating, a notch is formed by cutting off the ends in the width direction of the grooves of the two bearing bars on the upper side of the receiving frame. A mounting plate fixed to the lower ends of the bearing bars on both sides of the notched bearing bar is provided at the bottom of the notched portion, and a mounting hole for inserting a bolt is formed in the mounting plate. The receiving frame is formed with a receiving frame hole through which a bolt is inserted below the mounting hole of the mounting plate.

  When fixing the grating to the receiving frame, adjust the mounting hole of the mounting plate to a position vertically aligned with the receiving frame hole of the receiving frame, place the grating on the receiving frame, and attach the bolt with the cap body to the mounting hole and the receiving frame hole. The grating is fixed to the receiving frame by being inserted and screwed into a cap nut provided on the lower surface of the receiving frame.

JP 2010-116703 A

  The fixing structure of the grating described in Patent Document 1 is provided with a notch portion obtained by cutting out the end portions of the groove of the two bearing bars in the width direction at the corner portion of the grating, and the bolt is attached to the mounting plate and the receiving frame hole from the notch portion. The grating is fixed to the receiving frame by screwing into a cap nut provided on the lower surface of the receiving frame. In this fixing structure of the grating, a notch portion in which the end portion in the width direction of the groove of the bearing bar is cut off at the corner portion of the grating and a cap body for closing the notch portion are provided, so that the work process is increased. There is a problem that the number of parts increases and the cost increases. In addition, a cap body is provided on the head of the bolt so that the heel of a pedestrian's heel or the like is not caught in the notch of the grating, so that the notch is closed. Since the extended bearing bars are not continuous by the cap body, the aesthetic appearance of the grating is impaired. In addition, when removing the grating for cleaning the groove, the cap body is removed together with the bolt, and thus the cap body may be lost. The present invention aims to solve these problems.

In order to solve the above problems, a grating in which a large number of elongated bearing bars arranged in parallel to each other with a predetermined interval are connected by a connecting bar extending in a direction intersecting these is provided on a receiving frame provided at the upper part of the drainage groove. A fixing structure for the grating that is mounted and fixed, and the fixing structure is fixed so as to connect the lower portions of one end in the longitudinal direction of two bearing bars adjacent to each other, and a mounting hole through which a connecting bolt is inserted And a receiving frame hole that is formed in the receiving frame at a position below the mounting plate and through which the connecting bolt is inserted larger than the diameter of the threaded portion of the connecting bolt so that the position of the connecting bolt can be adjusted in the horizontal direction. A box with an open upper surface fixed to the lower surface of the receiving frame at the position where the hole is formed, and a nut that is housed in the box so that the position can be adjusted in the horizontal direction and locked to the inner peripheral wall of the box And be prepared In the upper part of the nut fixing a substantially rectangular flange formed by cutting one of the diagonal corners of the flange to engage with the peripheral wall of the box, so as to detent of the nut, adjacent 2 Insert the connecting bolt provided between the two bearing bars into the mounting hole and the receiving frame hole of the mounting plate, and rotate the connecting bolt with a tool passed between two bearing bars adjacent to each other. The fastening structure of the grating characterized by having fixed the grating to the receiving frame by fastening.

  In the fixing structure of the grating configured as described above, a connecting bolt provided between two bearing bars adjacent to each other is inserted into the mounting hole and the receiving frame hole of the mounting plate, and the two bearing bars adjacent to each other are inserted. The grating can be fixed to the receiving frame by fastening it to the nut by rotating the connecting bolt with a tool that passes between them, so the grating can be fixed to the receiving frame without cutting the end of the bearing bar, and the same length It is possible to maintain the aesthetics of the bearing bars that are continuous with a predetermined interval.

  In the fixing structure of the grating configured as described above, the receiving frame hole is preferably a long hole extending in the groove direction. In many cases, a plurality of gratings are continuously arranged in the groove direction, and it is difficult to accurately arrange the plurality of gratings in the groove direction, but the receiving frame hole is a long hole extending in the groove direction. Even if the grating cannot be accurately arranged in the groove direction, the mounting holes of the mounting plate are easily arranged vertically so that the connecting bolt can be inserted into the receiving frame hole.

  In the grating fixing structure configured as described above, the mounting hole of the mounting plate is a long hole extending in the longitudinal direction of the bearing bar or in a direction perpendicular thereto, and the receiving frame hole of the receiving frame extends in the groove direction or the groove width direction. It is preferable that the longitudinal direction of the mounting hole intersects the longitudinal direction of the receiving frame hole. In this case, the fixing position of the mounting plate of the grating or the position where the receiving frame long hole of the receiving frame is formed Even if the accuracy is not high, the long holes of the mounting plate can be easily arranged vertically in the receiving frame long holes of the receiving frame so that the connecting bolt can be inserted.

 In the fixing structure of the grating configured as described above, it is preferable to open the surface on the groove side of the box so as to communicate with the inside of the groove. Even if inflow, dirt and dust in the box can be scraped out from the opening into the groove. Similarly, in the grating fixing structure configured as described above, a part of the bottom wall of the box is opened, and a guide for communicating the inside of the box from the opening into the groove is provided below the bottom wall of the box. In this case, soil and dust in the box can be discharged from the opening of the bottom wall into the groove through the guide.

  In the grating fixing structure configured as described above, the cross-sectional shape in the direction perpendicular to the longitudinal direction of the bearing bar is a horizontal portion extending horizontally at the top and a vertical portion extending downward from the center of the horizontal portion. When shaped like a letter, the horizontal part of the bearing bar can cover many grooves, making it look good, making it difficult for objects to fall into the groove, and heels and other shoes to be caught between the bearing bars. Become. The head of the connecting bolt is larger than the distance between the horizontal portions of the two adjacent bearing bars, and is sized so as to be rotatable between the vertical portions. Even if it is the grating used, the grating can be fixed to the receiving frame by fastening to the nut by rotating the connecting bolt using a tool passed between the horizontal portions.

  In the fixing structure of the grating configured as described above, the fixing structure is directed to the opposite side edges at both side edges in the direction intersecting the longitudinal direction of the receiving hole instead of the nut housed in the box. Provided with metal engaging pieces that are continuous in the longitudinal direction of the receiving frame hole, and connecting bolts provided between two adjacent bearing bars are attached to the mounting hole and receiving frame hole of the mounting plate. Grating is performed by removably engaging the threaded portion of the connecting bolt with the engaging piece by rotating or pushing the connecting bolt with a tool that is inserted and passed between two bearing bars adjacent to each other. You may fix to a receiving frame.

It is one Embodiment of the fixing structure of the grating of this invention, and is the top view which fixed the grating with which many bearing bars extended in the width direction of a groove | channel on a receiving frame. FIG. 2 is an enlarged cross-sectional view in which the bearing bar of the grating fixing structure of FIG. 1 is partially broken. It is aa sectional drawing of FIG. It is a partially expanded sectional view of FIG. It is bb expanded sectional drawing of FIG. (A) The top view of a receiving frame, (b) The side view seen from the groove | channel side of the receiving frame. FIG. 5 is a partially enlarged cross-sectional view corresponding to FIG. 4, showing a modified example in which the box and nut of the fixed structure in FIG. 1 are changed. It is the modification which changed the box and nut of the fixed structure of FIG. 1, and is an expanded sectional view equivalent to FIG. It is other embodiment of the fixing structure of the grating of this invention, and is the top view which fixed the grating with which many bearing bars extended in a groove direction on a receiving frame. FIG. 10 is an enlarged cross-sectional view in which the bearing bar of the grating fixing structure of FIG. 9 is partially broken. It is cc sectional drawing of FIG. It is a partially expanded sectional view of FIG. FIG. 10 is an enlarged sectional view taken along line dd in FIG. 9. It is the top view which provided the engagement piece part in the side edge part orthogonal to the longitudinal direction of a receiving frame long hole. It is the figure which engaged the connecting bolt with the engagement piece part, and fixed grating to the receiving frame.

  Embodiments of a fixing structure for a grating according to the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 to 5, the fixing structure 10 of the grating according to the present embodiment includes a large number of elongated bearing bars 21 arranged in parallel with each other at a predetermined interval, by connecting bars 22 extending in a direction intersecting these. The connected grating 20 is placed and fixed on a receiving frame 30 provided at the upper part of both sides of the drainage groove D.

  As shown in FIG. 1, the grating 20 has a rectangular planar shape, and includes a plurality of bearing bars 21 extending in the width direction of the grooves D arranged in parallel to each other at a predetermined interval in the direction of the grooves D (along). These are connected by a connecting bar 22 extending in a direction orthogonal to (crossing) the bearing bar 21. As shown in FIG. 5, the bearing bar 21 includes a horizontal portion 21a having a cross-sectional shape in a direction orthogonal to the longitudinal direction extending horizontally upward and a vertical portion 21b extending downward from the center of the horizontal portion 21a. It has a letter shape. In this embodiment, the connecting bar 22 is provided at a substantially central portion in the longitudinal direction of the bearing bar 21, but the end bars 23, 23 provided at both ends in the longitudinal direction of the bearing bar 21 are used as connecting bars. Also good.

  As shown in FIGS. 1 and 2, the lower ends of the longitudinal ends of the two bearing bars 21, 21 adjacent to each other are connected to the four corners of the grating 20 at positions above the receiving frame 30. The mounting plate 24 is fixed so as to. The mounting plate 24 constitutes the fixing structure 10 of the present application, and the four corners of the grating 20 are fixed to the receiving frame 30 by the fixing structure 10 of the present application. As shown in FIGS. 2 to 5, the mounting plate 24 has a mounting hole 24 a formed of a long hole extending in the longitudinal direction of the bearing bar 21.

  As shown in FIGS. 3 and 4, the receiving frame 30 is a state in which the cross-sectional shape of the groove D in the width direction is L-shaped, and the upper side is open at the upper part of both side edges of the substantially U-shaped groove D provided on the road surface. It is buried in concrete C. 2 and 6, the horizontal portion 31 of the receiving frame 30 is formed with a receiving frame hole 32 constituting the fixing structure 10 below the position where the mounting plate 24 of the grating 20 is provided. Reference numeral 32 denotes a long hole extending in the direction of the groove D (along). A substantially rectangular parallelepiped box 33 having an upper surface opened at a position where the receiving frame hole 32 is formed is fixed to the lower surface of the horizontal portion 31 of the receiving frame 30, and the nut 34 is movable in the horizontal direction in the box 33. Contained. The receiving frame hole 32, the box 33, and the nut 34 constitute the fixing structure 10 of the present application. The box 33 is for accommodating the nut 34 on the lower surface of the receiving frame 30 embedded in concrete or the like so as to be movable in the horizontal direction. The box 33 is provided at a position where the receiving frame hole 32 is substantially at the center. Further, the surface on the groove D side of the box 33 has an opening 33 a with respect to the groove D, and the inside of the box 33 communicates with the groove D. A substantially rectangular flange 34a with one diagonal cut off is provided at the top of the nut 34. The flange 34a is engaged with a peripheral wall of the box 33 (particularly a peripheral wall extending in the width direction of the groove D). The nut 34 has a function of preventing rotation. The nut 34 can be taken in and out from the opening 33 a on the groove D side of the box 33.

  A connecting bolt 35 is provided between the bearing bars 21 and 21 adjacent to each other at the corner of the grating 20. The connecting bolt 35 is inserted through the mounting hole 24 a and the receiving frame hole 32 of the mounting plate 24. The position of the connecting bolt 35 can be adjusted in the longitudinal direction of the mounting hole 24 a and the longitudinal direction of the receiving frame hole 32. The lower part of the connecting bolt 35 is fastened to the nut 34 in the box 33. As shown in FIGS. 2 and 5, the diameter of the head portion 35a of the connecting bolt 35 is larger than the interval between the horizontal portions 21a and 21a of the two adjacent bearing bars 21 and 21, and between the vertical portions 21b and 21b. The size is rotatable. The head portion 35a of the connecting bolt 35 is formed with a regular hexagonal recess for rotation from above, and the connecting bolt 35 is inserted from between the horizontal portions 21a, 21a of the two bearing bars 21, 21 adjacent to each other. A bar-shaped tool such as a hexagon wrench is engaged with the concave portion of the head portion 35a and rotated. The concave portion of the head portion 35a of the connecting bolt 35 is not limited to a regular hexagonal concave portion, and may be a positive, negative concave portion, or a regular polygonal concave portion such as a regular triangle, a square, or an octagon. Good. As shown in FIGS. 4 and 5, a resin washer 35 b is attached to the connecting bolt 35 on the lower side of the mounting plate 24 to prevent it from coming off.

  Next, an operation method for fixing the grating 20 to the receiving frame 30 in the fixing structure 10 for the grating will be described. In the grating 20, a connecting bolt 35 is inserted in advance into the mounting hole 24 a of the mounting plate 24. Further, the nut 34 is accommodated in the box 33 of the receiving frame 30 from the opening 33a on the groove D side. When the female screw portion at the center of the nut 34 is accommodated so as to be in the center of the longitudinal direction of the receiving frame hole 32 and the direction orthogonal to the longitudinal direction, a connecting bolt 35 described later is easily screwed into the nut 34.

  The mounting hole 24 a of the mounting plate 24 is adjusted to a position vertically aligned with the receiving frame hole 32 of the receiving frame 30, and the grating 20 is placed on the receiving frames 30, 30 on both sides. The position of the connecting bolt 35 is adjusted in the longitudinal direction of the mounting hole 24a with a bar-shaped tool such as a hexagon wrench inserted between the horizontal portions 21a and 21a of the two adjacent bearing bars 21 and 21 of the grating 20, and the connecting bolt The front end of 35 is inserted into the receiving frame hole 32. Using a tool such as a hexagon wrench, the tip of the connecting bolt 35 is finely adjusted to a position where it can be screwed into the nut 34. When the connecting bolt 35 is rotated using a tool such as a hexagon wrench, the tip of the connecting bolt 35 is engaged with the nut 34, and the nut 34 starts to rotate together with the connecting bolt 35, but the flange 34a is the peripheral wall of the box 33. By locking the nut 34, the nut 34 is prevented from rotating. When the connecting bolt 35 is further rotated and fastened to the nut 34 using a tool such as a hexagon wrench, the grating 20 is fixed to the receiving frame 30.

  The fixing structure 10 of the grating described above is an attachment having an attachment hole 24a that is fixed so as to connect the lower portions of the longitudinal ends of the two adjacent bearing bars 21, 21 and through which the connection bolt 35 is inserted. A receiving frame hole 32 that is formed in the receiving frame 30 at a position below the mounting plate 24 and is larger than the diameter of the threaded portion of the connecting bolt 35 and through which the connecting bolt 35 can be adjusted in the horizontal direction. A box 33 having an open upper surface fixed to the lower surface of the receiving frame 30 at a position where the receiving frame hole 32 is formed, and accommodated in the box 33 so as to be positionally adjustable in the horizontal direction and locked to the inner peripheral wall of the box 33 And a nut 34 that is prevented from rotating. In the fixing structure 10 of the grating, the connecting bolt 35 provided between the two adjacent bearing bars 21 and 21 is inserted into the mounting hole 24a and the receiving frame hole 32 of the mounting plate 24, and the two adjacent to each other. The grating 20 was fixed to the receiving frame 30 by being fastened to the nut 34 by rotating the connecting bolt 35 using a tool passed between the bearing bars 21 and 21. Thus, since the grating 20 can be fixed to the receiving frame 30 without cutting off the end of the bearing bar, it is possible to maintain the aesthetics of the bearing bars having the same length being continuous with a predetermined interval. Further, since it is not necessary to cut off the end of the bearing bar, the manufacturing cost can be reduced.

  Generally, in order to fix the grating to the receiving frame using bolts, the connecting bolts cannot be inserted unless the through holes of the connecting bolts formed on both the mounting plate fixed to the grating and the receiving frame are arranged vertically. . The grating 20 is often large in size because it constitutes a part of a structure such as a building, and there is a concern that the cost may be high for accurately attaching the intervals between the numerous bearing bars 21 and the fixing positions of the mounting plates 24. . In addition, all the four corners of the grating 20 cannot be fixed unless the insertion holes of all the connecting bolts at the four corners of the grating 20 are arranged vertically.

  In the grating fixing structure 10 of the present embodiment, the mounting hole 24a of the mounting plate 24 is a long hole extending in the longitudinal direction of the bearing bar 21, in this case, the width direction of the groove D, and the receiving frame hole 32 of the receiving frame 30 is a groove. It is a long hole extending along D. As described above, since the mounting hole 24a of the mounting plate 24 and the receiving frame hole 32 are elongated holes extending in the crossing direction, the mounting hole 24a of the mounting plate 24 is aligned vertically with the receiving frame hole 32 so that the connecting bolt 35 can be inserted. Cheap. Further, although the lower surface of the receiving frame 30 is buried with concrete, the nut 34 is accommodated in the box 33 and can move in the horizontal direction, so that the connecting bolt 35 is inserted from any position in the longitudinal direction of the receiving frame hole 32. However, it can be fastened to the connecting bolt 35. As a result, the grating 20 is inserted into the mounting holes 24a and the receiving frame holes 32 of the mounting plate 24 by inserting the connecting bolts 35, even if a large number of bearing bars 21 and mounting plates 24 are not accurately mounted. The nut 34 can be fastened.

  Further, in many cases, a plurality of gratings 20 are continuously arranged in the direction of the groove D, and it is difficult to accurately arrange all of the plurality of gratings 20 in the direction of the groove D. In the case of the fixed structure 10, the receiving frame hole 32 is a long hole extending in the groove D direction, so that the mounting hole 24 a of the mounting plate 24 can be formed in the receiving frame hole 32 even if the grating 20 cannot be accurately arranged in the groove D direction. The connecting bolts 35 can be easily inserted vertically. In the grating fixing structure 10 of the present embodiment, the receiving frame hole 32 is a long hole extending in the groove D direction. However, the present invention is not limited to this, and the position of the connecting bolt 35 can be adjusted in the horizontal direction. The receiving frame hole 32 may be any hole that is larger than the diameter of the threaded portion of the connecting bolt 35 and smaller than the diameter of the head portion 35a. When the receiving frame hole 32 is such a hole, the grating 20 cannot be fixed so that the position of the grating 20 can be greatly adjusted in the direction along the groove D as described above. It can be fixed in the width direction of the groove D so that the position can be adjusted.

  Further, in the grating 20 used for the fixing structure 10 of the grating, the bearing bar 21 includes a horizontal portion 21a whose cross-sectional shape in the direction orthogonal to the longitudinal direction extends horizontally upward, and a lower side from the center of the horizontal portion 21a. A plurality of T-shaped bearing bars 21 are arranged in parallel with a predetermined interval. The use of the T-shaped bearing bar 21 makes it possible to cover many grooves D with the horizontal portion 21a and improve the appearance. Also, it is difficult for objects to fall into the grooves D. It becomes difficult to be pinched between the bars 21. In the grating fixing structure 10 of this embodiment, the head portion 35a of the connecting bolt 35 is larger than the interval between the horizontal portions 21a and 21a of the two adjacent bearing bars 21 and 21, but the vertical portions 21b and 21b are not. It is the size which can be rotated between. If the distance between the horizontal portions 21a and 21a is within a range in which a bar-shaped tool such as a hexagon wrench can be inserted, a bar-shaped tool such as a hexagon wrench is inserted between the horizontal portions 21a and 21a to connect the head 35a of the connecting bolt 35. And the connecting bolt 35 can be fastened to the nut 34. As described above, in the grating fixing structure 10 of the present application, the T-shaped bearing bar 21 is provided if the distance between the horizontal portions 21a and 21a of the bearing bars 21 and 21 that are adjacent to each other is such that a rod-shaped tool can be inserted. It is also possible to fix the used grating 20 to the receiving frame 30. The grating fixing structure 10 is not limited to fixing the grating 20 using the T-shaped bearing bar 21, but the horizontal portion is eliminated and the vertical section is a bar-shaped bearing bar with a short top and bottom. The present invention is also applied to fixing a grating using an I-shaped bearing bar having a horizontal portion, an inverted J-shaped bearing bar, or an inverted Δ-shaped bearing bar.

  In the grating fixing structure 10, the box 33 fixed to the lower surface of the receiving frame 30 has an opening 33 a on the groove D side of the box 33 with respect to the groove D. It communicates with the groove D. Even if soil, dust, or the like flows into the box 33 from the receiving frame hole 32, the dirt, dust, etc. in the box 33 can be scraped into the groove D from the opening 33a, so that the grating 20 is fixed to the receiving frame 30. Sometimes, the nut 34 can be moved in the horizontal direction without being obstructed by dirt or dust. In this embodiment, the surface on the groove D side of the box body 33 is opened 33a with respect to the groove D. However, the present invention is not limited to this and is on the groove D side of the box body 33. This includes those whose surfaces are blocked. When used in a place where there is little dirt, dust or the like, even if the surface on the groove D side of the box 33 is blocked, it can be used sufficiently.

  Further, in the grating fixing structure 10 of the above embodiment, the box 33 and the nut 34 may be changed as follows. That is, as shown in FIGS. 7 and 8, the box 33 </ b> A has a substantially rectangular parallelepiped shape with an upper surface fixed to the lower surface of the receiving frame hole 32 of the receiving frame 30. The planar shape of the box 33 </ b> A is a rectangle extending in the longitudinal direction of the receiving frame hole 32. A nut 34 </ b> A is accommodated in the box 33 </ b> A so as to be movable along the longitudinal direction of the receiving frame hole 32. The nut 34A is a hexagonal nut in which the flange 34a of the nut 34 is eliminated. The inner diameter in the width direction of the groove D of the box 33A is a length slightly larger than the distance between opposite sides of the nut 34A and smaller than the distance between diagonals, and the nut 34A is arranged in the width direction of the groove D in the box 33A. Locked on both side walls to prevent rotation. The central part (a part) of the bottom wall of the box 33A has a rectangular opening 33Aa, and when the nut 34A is not fastened to the connecting bolt 35, the nut 34A is locked to the periphery of the opening 33Aa and does not fall from the opening 33Aa. A guide 33Ab that communicates with the groove D from the opening 33Aa is integrally provided on the bottom wall lower surface of the box 33A.

  As described above, when the grating fixing structure 10 is changed to the box 33A and the nut 34A, even if dirt or dust flows from the receiving frame hole 32 into the box 33A, dirt or dust in the box 33A is removed. Since it can be discharged from the opening 33Aa through the guide 33Ab into the groove D, when the grating 20 is fixed to the receiving frame 30, the nut 34A is moved in the longitudinal direction of the box 33A without being obstructed by dirt or dust. be able to. Further, since the nut 34A is housed in the box 33A in a state of being locked to the periphery of the opening 33Aa of the box 33A, there is no possibility that the nut 34A is lost.

  In the grating fixing structure 10 configured as described above, the mounting hole 24a of the mounting plate 24 is a long hole extending in the longitudinal direction of the bearing bar 21, and the receiving frame hole 32 of the receiving frame 30 is a long hole extending along the groove D. did. The present invention is not limited to this. For example, if there is a sufficient interval between the two bearing bars 21 and 21 adjacent to each other, the mounting hole 24a of the mounting plate 24 is arranged in the horizontal direction and the longitudinal direction of the bearing bar 21. It is good also as a long hole extended in the direction which intersects. In this case, it is preferable that the receiving frame hole 32 is a long hole extending in the width direction of the groove D so that the mounting hole 24 a of the mounting plate 24 intersects the receiving frame hole 32.

  Next, another embodiment of the grating fixing structure of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 9 to 11, the grating fixing structure 10 </ b> B of this embodiment also includes a plurality of elongate bearing bars 21 </ b> B arranged in parallel to each other at a predetermined interval by connecting bars 22 extending in a direction intersecting these. The connected grating 20B is placed and fixed on a receiving frame 30 provided on the upper part of both sides of the drainage groove D. The grating 20B according to this embodiment has a rectangular shape, and a plurality of bearing bars 21B extending in the direction of the groove D (along) arranged in parallel to each other with a predetermined interval in the width direction of the groove D, and the bearing bar 21B. They are connected by a connecting bar 22 extending in a direction orthogonal to (intersecting). Since other than this is the same as the grating 20 described above, detailed description thereof is omitted.

  As shown in FIGS. 9 to 13, at the four corners of the grating 20 </ b> B, two bearing bars 21 </ b> B and 21 </ b> B that are adjacent to each other at a position on the upper side of the receiving frame 30 as in the grating 20 of the above-described embodiment. A mounting plate 24B is fixed so as to connect the lower portions of the end portions in the longitudinal direction. A mounting hole 24Ba extending in the longitudinal direction of the bearing bar 21B is also formed in the mounting plate 24B. In this embodiment, the mounting hole 24Ba of the mounting plate 24B is not a long hole extending in a direction intersecting the receiving frame hole 32, but the mounting hole 24Ba is wider than the diameter of the connecting bolt 35 in the width direction of the groove D. Thus, the mounting hole 24Ba and the receiving frame hole 32 can be arranged vertically so that the connecting bolt 35 can be inserted therethrough. Since other than this is the same as the above-described embodiment (including those changed to the box 33A and the nut 34A), detailed description thereof is omitted.

  Also in the grating fixing structure 10B configured in this way, the mounting hole 24Ba of the mounting plate 24B described in the above-described grating fixing structure 10 and the receiving frame hole 32 are elongated holes extending in the intersecting direction. Except for the operational effects, it is the same as the fixing structure 10 of the grating described above. Note that when the receiving frame hole 32 formed in the receiving frame 30 is a long hole extending in the width direction of the groove D, it is a long hole extending in the direction in which the mounting hole 24a of the mounting plate 24 and the receiving frame hole 32 of the above-described embodiment intersect. The effect obtained by being can be obtained.

  In the grating fixing structure 10B configured as described above, the mounting hole 24Ba of the mounting plate 24B is a long hole extending in the longitudinal direction of the bearing bar 21B, and the receiving frame hole 32 of the receiving frame 30 is a long hole extending along the groove D. . The present invention is not limited to this. For example, if there is a sufficient interval between the two bearing bars 21B and 21B adjacent to each other, the mounting hole 24Ba of the mounting plate 24B is arranged in the longitudinal direction and the horizontal direction of the bearing bar 21B. It is good also as a long hole extended in the direction which intersects. In this case, the mounting hole 24Ba of the mounting plate 24B intersects the receiving frame hole 32, and is a long hole extending in the direction in which the mounting hole 24a of the mounting plate 24 and the receiving frame hole 32 intersect as described above. The effect obtained by this can be obtained.

  Further, in each of the grating fixing structures 10 and 10B configured as described above, as shown in FIGS. 14 and 15, a receiving frame hole formed in the receiving frame 30 instead of the nut 34 accommodated in the box 33. A metal engagement piece 36 that is detachably engaged with the threaded portion of the connecting bolt 35 may be provided on both side edges intersecting with the longitudinal direction of 32 in the longitudinal direction. The engaging piece portions 36 protrude toward the lower side of the opposite side edges at both side edges that intersect the longitudinal direction of the receiving frame hole 32, and are formed continuously in the longitudinal direction of the receiving frame hole 32. Yes.

  In such a case, the connecting bolt 35 provided between the two bearing bars 21 and 21 (21B and 21B) adjacent to each other is inserted into the mounting hole 24a (24Ba) and the receiving frame hole 32 of the mounting plate 24 (24B). Then, by rotating or pushing the connecting bolt 35 with a tool such as a hexagon wrench inserted between the two bearing bars 21 and 21 (21B and 21B) adjacent to each other, the engagement piece 36 is elastically deformed downward. In addition, the grating 20 (20B) can be fixed to the receiving frame 30 by being detachably engaged with the threaded portion of the connecting bolt 35 and fastened. Since the engaging piece portions 36 on both sides are formed continuously in the longitudinal direction of the receiving frame hole 32, the connecting bolt 35 can be engaged with the engaging piece portion 36 at any portion in the longitudinal direction of the receiving frame hole 32. . As described above, the connecting bolts 35 can be connected to the holes 24a (24Ba) even if the accuracy of the gratings 20 and 20B is not high due to the mounting holes 24a (24Ba) and the receiving frame holes 32 of the mounting plate 24 (24B). ), 32 can be inserted. In addition, by loosening the connecting bolt 35, it is possible to disengage the threaded portion of the connecting bolt 35 from the engaging piece 36. The effects other than these are the same as in the above-described embodiment.

  In each of the above-described embodiments, the grating fixing structures 10 and 10B are provided at the four corners of the gratings 20 and 20B. However, the present invention is not limited to this, and the grating fixing structures 10 and 10B are connected to the grating 20. , 20B provided at one or two corners, or if the gratings 20 and 20B are long in the direction along the groove D, in addition to the four corners, one in the middle in the direction along the groove D The above may be added (six or eight locations of the gratings 20 and 20B).

  In each of the above embodiments, the mounting holes 24a, 24Ba of the mounting plates 24, 24B are elongated holes extending in the longitudinal direction of the bearing bars 21, 21B. However, the present invention is not limited to this, and the connecting bolt 35 However, the diameter of the connecting bolt 35 is set so that the threaded portion of the connecting bolt 35 can be inserted almost without a gap, or the diameter of the connecting bolt 35 is slightly larger than the screwed portion so that the screwed portion of the connecting bolt 35 can move slightly in the horizontal direction. It may also be a hole. In this case, it is necessary to increase the accuracy of the gratings 20 and 20B, but the gratings 20 and 20B can be fixed to the receiving frame 30 without impairing the appearance of the gratings 20 and 20B.

  Similarly, in each of the above embodiments, the receiving frame hole 32 of the receiving frame 30 is formed in the direction along the groove D. However, the present invention is not limited to this, and the threaded portion of the connecting bolt 35 extends in the horizontal direction. It may be a round hole having a larger diameter than the threaded portion so as to be movable. Even if it does in this way, although it is necessary to raise the precision of the gratings 20 and 20B, it can fix to the receiving frame 30 without impairing the appearance of the gratings 20 and 20B.

 10, 10B ... Grating fixing structure, 20, 20B ... Grating, 21, 21B ... Bearing bar, 21a, 21Ba ... Horizontal portion, 21b, 21Bb ... Vertical portion, 22 ... Connection bar, 24, 24B ... Mounting plate, 24a, 24Ba ... mounting hole, 30 ... receiving frame, 32 ... receiving frame hole, 33 ... box, 33a ... opening, 34 ... nut, 34a ... flange, 35 ... connecting bolt.

Claims (6)

A grating in which a grating in which a large number of elongated bearing bars arranged in parallel with each other at a predetermined interval are connected by a connecting bar extending in a direction intersecting with them is placed on a receiving frame provided at the upper part of the drainage groove and fixed. A fixed structure,
The fixing structure includes a mounting plate having a mounting hole that is fixed so as to connect a lower portion of one longitudinal end portion of the two bearing bars adjacent to each other and through which a connecting bolt is inserted;
A receiving frame hole formed in the receiving frame at a position on the lower side of the mounting plate, through which the connecting bolt is inserted larger than the diameter of the thread portion of the connecting bolt so that the position of the connecting bolt can be adjusted in the horizontal direction;
A box with an open upper surface fixed to the lower surface of the receiving frame at the position where the receiving frame hole is formed;
A nut that is accommodated in the box body so that the position thereof can be adjusted in the horizontal direction, and is locked to the peripheral wall of the box body to prevent rotation.
A substantially rectangular flange with one diagonal cut off is fixed to the top of the nut, the corner of the flange is locked to the peripheral wall of the box, and the nut is prevented from rotating.
The connecting bolt provided between the two adjacent bearing bars is inserted into the mounting hole and the receiving frame hole of the mounting plate, and a tool passed between the two adjacent bearing bars is used. A grating fixing structure, wherein the grating is fixed to the receiving frame by fastening the nut to the nut by rotating the connecting bolt. The fixing structure of the grating according to claim 1,
A grating fixing structure, wherein the receiving frame hole is a long hole extending in the groove direction. The fixing structure of the grating according to claim 1,
The mounting hole of the mounting plate is a long hole extending in the longitudinal direction of the bearing bar or a direction orthogonal thereto, and the receiving frame hole of the receiving frame is a long hole extending in the groove direction or the width direction of the groove,
A fixing structure for a grating, characterized in that the longitudinal direction of the mounting hole intersects the longitudinal direction of the receiving frame hole. In the fixing structure of the grating according to any one of claims 1 to 3,
A grating fixing structure, wherein a surface of the box on the groove side is opened and communicated with the groove. In the fixing structure of the grating according to any one of claims 1 to 3,
A fixing structure for a grating, wherein a part of the bottom wall of the box is opened, and a guide is provided below the bottom wall of the box to communicate the box from the opening into the groove. . In the fixing structure of the grating according to any one of claims 1 to 5,
The cross-sectional shape in a direction perpendicular to the longitudinal direction of the bearing bar has a T-shape including a horizontal portion extending horizontally upward and a vertical portion extending downward from the center of the horizontal portion, A fixing structure for a grating, characterized in that it is larger than the interval between the horizontal portions of two bearing bars adjacent to each other and is sized to rotate between the vertical portions.

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