JP2012077588A - Cover material attachment structure and cover material attachment fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover material attachment structure and a cover material attachment fitting, which enable a cover material to be extremely easily attached to/detached from a grating without the need for large-scale work.SOLUTION: In a cover material attachment structure, a punching metal 20 as a cover material, in which a large number of openings 21 smaller in dimension than an interval between main bars 11 are formed, is attached to a top surface of a grating 10 equipped with the plurality of disposed main bars 11. An attachment fitting 30 locked or fixed to the main bar 11 is provided. The attachment fitting 30 is fixed by being screwed to a bolt 31 having a shank inserted through an attachment hole 22 formed in the punching metal 20. Thus, the punching metal 20 is attached to the top surface of the grating 10.

Description

  The present invention relates to a cover material mounting structure and a cover material mounting bracket.

  As is well known, the grating is a flat plate member in which steel materials such as iron, stainless steel, and aluminum are assembled in a lattice shape, and is widely used as a lid that covers grooves such as side grooves. In addition, grating has properties such as light weight and good air permeability compared to iron plates, etc., so that it can reduce the load of wind or improve ventilation while reducing shaded parts, etc. It is widely used as an operation sidewalk in factories and the like for the purpose of preventing the occurrence of such as.

  Here, since the grating is formed with a large number of openings having a width of about several centimeters and a length of about tens of centimeters, a small accessory on the grating (for example, a writing instrument dropped by an operator on the grating) ) Often falls downward through the opening in the grating. A plate-shaped cover material (punching metal) in which a number of finer holes than the opening of the grating is formed is attached on the grating that needs to prevent such small objects from falling. By using the punching metal, it is possible to prevent the fall of small items at low cost without losing the above-mentioned characteristics of the grating.

  Conventionally, in order to prevent displacement from the grating, the punching metal has been fixed to the grating from the upper side of the grating using a mounting bracket that is welded to the grating or arranged below the grating. Patent Document 1 below discloses a method of fixing a cover material to the upper surface of the grating with a screw using a cover material fixture engaged with the louver of the grating from below the grating.

JP 2000-17820 A

  By the way, even if the punching metal is attached for each grating in the unit of the grating, if there is a gap between the grating and the grating, small articles may fall downward from the gap. For this reason, the punching metal is often attached over a plurality of gratings so as to cover not only the opening of the grating but also the gap between the gratings.

  However, if the punching metal is welded and fixed to the grating as in the prior art, it is necessary to remove a plurality of gratings and the punching metal as one body in order to remove the grating from the installation location, and a large-scale work is required. For this reason, there is a problem that a simple maintenance operation (for example, coating of a support member that supports the grating) with the grating removed is practically difficult.

  Moreover, in patent document 1 mentioned above, since a cover material can be removed from a grating if a screw is loosened from the upper surface of a cover material, the removal from the installation place of a grating can be performed easily. However, since it is necessary to use the grating upside down, there is a problem that it is not suitable for partially laying punching metal. Further, since the cover material fixture is engaged with a louver whose strength cannot be expected, there is a problem that it is not suitable for use in a situation where strength is required.

  The present invention has been made in view of the above circumstances, and has a cover material mounting structure and a cover material mounting bracket capable of performing attachment and removal of a cover material to and from a grating very easily without requiring a large-scale work. The purpose is to provide.

In order to solve the above problems, the cover member mounting structure of the present invention has an opening (21) smaller than the interval between the main bars on the upper surface of the grating (10) having a plurality of main bars (11) arranged. A cover material mounting structure for attaching a large number of formed cover materials (20), comprising mounting brackets (30, 40) locked or fixed to the main bar, and mounting holes formed in the cover material The cover member is attached to the upper surface of the grating by fixing the attachment bracket to the bolt (31) having the shaft portion inserted into (22) by screwing.
In the cover material mounting structure of the present invention, the mounting bracket includes a first flat surface portion (30a) disposed at an upper end of the main bar and a second flat surface portion (30b) fixed to the main bar. An L-shaped metal fitting, wherein the first flat surface portion is sandwiched between a head portion of the bolt and a nut member (32) that is disposed on the back surface of the first flat surface portion and screwed to the bolt. The mounting bracket is fixed to the bolt.
In the cover material mounting structure of the present invention, the first flat surface portion has a notch portion (N) into which a nut member screwed into the bolt inserted into the mounting hole is inserted, When the nut member is rotated around the bolt, the nut member is sized to abut against at least one of the second flat portion of the mounting bracket and the main bar.
In the cover material mounting structure of the present invention, the mounting hole provided in the cover material has an inner diameter larger than the head of the bolt, and the bolt has an outer diameter larger than the inner diameter of the mounting hole. The mounting hole is inserted through a large washer (33).
On the other hand, in the cover material mounting structure of the present invention, the mounting bracket is narrower than the interval between the main bars, and is disposed on the upper end of the main bar and fixed to the bolt (first plane portion) 41), the second flat surface portion (42a, 42b) engaged with the lower end of the main bar in a state where the first flat surface portion is disposed at the upper end of the main bar, and the width of the main bar. A third plane portion (43a, 43b) that crosses both the first and second plane portions and connects the first plane portion and the second plane portion, and the main bar. A fourth plane part (44a, 44b) that is set longer than the width of the second plane part and is provided on both sides of the second plane part so as to intersect the second plane part and is bent at the position of the upper surface of the grating. It is characterized by having.
In the cover member mounting structure of the present invention, the first flat surface portion is provided with a screw hole (Q) into which the bolt is screwed.
Alternatively, in the cover material mounting structure of the present invention, the first flat surface portion has a notch portion (N) into which a nut member screwed into the bolt inserted into the mounting hole is inserted, The nut member is characterized in that it is sized to abut on the third flat surface portion of the mounting bracket when rotated about the bolt.
The cover material mounting bracket of the present invention is a cover material (20) in which a large number of openings (21) smaller than the interval between the main bars are formed on the upper surface of a grating (10) having a plurality of arranged main bars (11). In the cover member mounting bracket (40), the first flat portion (41) being narrower than the interval between the main bars and fixed to the bolts at the upper end of the main bar, and the first In a state where the flat surface portion is disposed at the upper end of the main bar, the second flat surface portion (42a, 42b) that engages with the lower end of the main bar, and a length that is approximately the same as the width of the main bar, A third plane part (43a, 43b) that intersects both the first and second plane parts and connects the first plane part and the second plane part, and is set longer than the width of the main bar. Both sides of the second plane part Is characterized by a fourth planar portion which is bent at the position of the upper surface of the grating provided so as to cross the second plane portion (44a, 44b).

  According to the present invention, the mounting bracket is fixed or fixed to the main bar provided in the grating, and the mounting bracket is screwed into the bolt whose shaft portion is inserted into the mounting hole formed in the cover material. By fixing, the cover material is attached to the upper surface of the grating. As a result, the attachment and removal of the cover material with respect to the grating can be performed only from the upper surface side of the cover material, and a scaffold for performing the operation from below the grating is not required. In addition, there is an effect that the removal can be performed very easily without requiring a large-scale work. Further, since the mounting bracket is locked or fixed to the main bar, there is an effect that the cover material can be attached to the grating with high strength.

It is a top view which shows the grating of the state in which the cover material was attached by the cover material attachment structure by 1st Embodiment of this invention. It is a figure which shows the cover material attachment structure by 1st Embodiment of this invention. It is a perspective view which shows the cover material attachment metal fitting by 2nd Embodiment of this invention. It is sectional drawing which shows the state in which the cover material attachment metal fitting by 2nd Embodiment of this invention is attached to grating.

  Hereinafter, a cover material mounting structure and a cover material mounting bracket according to an embodiment of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a plan view showing grating in a state in which a cover material is attached by the cover material attachment structure according to the first embodiment of the present invention. In FIG. 1, for easy understanding, a state in which a part of the punching metal 20 as the cover material is cut out is illustrated. Further, FIG. 1 illustrates an example in which one punching metal 20 is attached to three gratings 10.

  As shown in FIG. 1, the grating 10 is a flat plate member in which three types of bars, a main bar 11, a cross bar 12, and an end bar 13 are assembled in a lattice shape. Specifically, a large number of main bars 11 are bridged at a predetermined interval between a pair of end bars 13 and 13 arranged at the left and right ends in FIG. Several crossbars 12 having the same length as that of the main bar 11 are arranged in a state orthogonal to the main bar 11 (a state along the end bar 13).

  Here, the main bar 11, the cross bar 12, and the end bar 13 are flat members having a width of about several centimeters, and the width direction thereof is along the vertical direction (the direction intersecting the paper surface of FIG. 1). And arranged as described above. The main bar 11, the cross bar 12, and the end bar 13 are formed of a steel material such as iron, stainless steel, or aluminum. Note that the numbers of the main bars 11 and the cross bars 12 are appropriately set according to the size and use of the grating 10. Further, the cross bar 12 may be a bar-like one having a circular cross-section instead of a flat one.

  The portion of the grating 10 surrounded by the main bar 11 and the cross bar 12 and the portion surrounded by the end bar 13 in addition to the main bar 11 and the cross bar 12 are rectangular openings 14 in plan view. Yes. By forming the opening 14, properties unique to the grating 10 such as being lighter than an iron plate and having good air permeability can be obtained.

  At a predetermined position of the main bar 11 constituting the grating 10, a mounting bracket 30 (cover material mounting bracket) for mounting the punching metal 20 to the upper surface of the grating 10 using a bolt 31 is provided. In the example shown in FIG. 1, mounting brackets 30 are provided at the left and right ends of the main bar 11 adjacent to the main bars 11 arranged at both ends in the length direction of the end bar 13. For this reason, in the example shown in FIG. Details of the mounting bracket 30 will be described later.

  The punching metal 20 is a cover material having a rectangular shape in plan view attached over the three gratings 10 in order to prevent small objects from dropping from the opening 14 of the grating 10 and the gap between the gratings 10. , Iron, stainless steel, aluminum and other steel plates. The punching metal 20 has a large number of openings 21 smaller than the spacing of the grating 10 and mounting holes 22 into which bolts 31 for mounting the punching metal 20 on the grating 10 are inserted (not shown in FIG. 1: FIG. 2). (See (b)).

  The opening 21 is a circular hole having an inner diameter of about 5 millimeters, for example, and is formed on almost the entire surface of the punching metal 20. In FIG. 1, only a part of the openings 21 is shown for easy understanding. This opening 21 is for realizing the fall prevention of small items while maintaining the characteristics of the grating 10 (for example, lighter and better air permeability than an iron plate or the like) to some extent.

  The mounting hole 22 is a hole formed at a position corresponding to the position where the mounting bracket 30 of the grating 10 is provided. This mounting hole 22 is used to allow the bolt 31 to attach the punching metal 20 to the grating 10 even if there is a positional error of the mounting hole 22 in the punching metal 20 and a positional error of the mounting bracket 30 with respect to the grating 10. Further, the inner diameter is larger than the head of the bolt 31.

  Next, the cover material mounting structure including the mounting bracket 30 will be described in detail. 2A and 2B are diagrams showing a cover material mounting structure according to the first embodiment of the present invention, in which FIG. 2A is a plan view, and FIG. 2B is a cross-sectional view taken along line AA in FIG. It is. FIG. 2A shows a state in which a part of the punching metal 20 is cut out for easy understanding, as in FIG.

  As shown in FIGS. 2A and 2B, the mounting bracket 30 is an L-shaped bracket made up of a first plane portion 30a and a second plane portion 30b, and is formed of iron, stainless steel, aluminum, or the like. The The mounting bracket 30 has a state in which the first flat portion 30a is disposed at the upper end of the main bar 11 (more precisely, a state in which the first flat portion 30b protrudes from the upper end of the main bar 11 by several millimeters), and the second flat portion 30b is the main flat portion 30b. It is fixed to the bar 11. Here, in a substantially central portion of the first plane portion 30a, a cutout portion N in which the shape in plan view is rectangular and the nut member 32 is inserted is formed.

  Specifically, the notch N can be inserted into the nut member 32 when the nut member 32 screwed into the bolt 31 is in the state indicated by the reference numeral 32a in FIG. A size in which the first flat surface portion 30a of the mounting bracket 30 can be sandwiched between the head of the bolt 31 and the nut member 32 when in the state shown in FIG. Is formed. The punching metal 20 is fixed on the grating 10 by sandwiching the first flat portion 30a of the mounting bracket 30 between the head of the bolt 31 and the nut member 32.

  The shaft of the bolt 31 is inserted through the mounting hole 22 formed in the punching metal 20 through the washer 33. As described above, since the inner diameter of the mounting hole 22 is formed larger than the head of the bolt 31, the washer 33 having an outer diameter larger than the inner diameter of the mounting hole 22 is used. The inner diameter of the washer 33 is set larger than the diameter of the shaft portion of the bolt 31 and smaller than the head portion of the bolt 31. Here, in order to reduce the protrusion from the upper surface of the punching metal 20, it is desirable to use, for example, a hexagon socket headed low head bolt as the bolt 31.

  The nut member 32 is a plate nut in which screw holes into which the bolts 31 are screwed are unevenly formed from the center. As described above, the nut member 32 is screwed into the bolt 31 and is provided with the reference numeral 32a in FIG. It is set to a size that can be inserted into the portion N and abuts on at least one of the second flat surface portion 30b of the mounting bracket 30 or the main bar 11 when rotated around the bolt 31. This is because the bolt 31 and the nut member 32 can be fastened only by rotating the bolt 31 without operating (supporting) the nut member 32 from below the grating 10.

  Next, a method for attaching the punching metal 20 on the grating 10 will be described. In attaching the punching metal 20 onto the grating 10, first, the operator firstly attaches a bolt 31 in which a washer 33 is inserted into each of the attachment holes 22 provided in the punching metal 20 from the upper surface side (front surface side) of the punching metal 20. The nut member 32 is loosely screwed into each bolt 31 from the bottom surface side (back surface side) of the punching metal 20 (so loose that the nut member 32 cannot be removed).

  Next, the operator places the punching metal 20 to which the bolt 31 and the nut member 32 are attached on the grating 10, and the attachment hole 22 formed in the punching metal 20 is provided above the attachment fitting 30 provided in the grating 10. Rough alignment is performed so that each is arranged. When the rough alignment is completed, the operator operates the bolt 31 inserted through the mounting hole 22 from above the punching metal 20 and moves the nut member 32 loosely screwed to the bolt 31 in FIG. In this state, the reference numeral 32a is attached. Then, the nut member 32 is inserted into the notch N formed in the mounting bracket 30, and the nut member 32 is disposed below the first flat surface portion 30a of the mounting bracket 30, so that the reference numeral 32a in FIG. Make it attached. Similarly, the above operations are sequentially performed on the remaining bolts 31.

  When the above operations are completed, the operator sequentially rotates the bolt 31 from above the punching metal 20 using, for example, a hexagon wrench, and fixes the punching metal 20 on the grating 10 by the head of the bolt 31 and the nut member 32. Work to do. Here, when the rotation of each bolt 31 is started, the nut member 32 also rotates in accordance with the rotation of the bolt 31. However, when the nut member 32 rotates about 90 degrees, the nut member 32 comes into contact with the second flat surface portion 30b of the mounting bracket 30 and does not rotate even if the bolt 31 is rotated.

  When the worker continues to rotate the bolt 31, the nut member 32 moves upward along the shaft portion of the bolt 31 in accordance with the rotation of the bolt 31, and the bolt 31 and the nut member 32 are finally fastened. Thus, the punching metal 20 and the first flat surface portion 30a of the mounting bracket 30 are sandwiched between the head of the bolt 31 and the nut member 32, and the punching metal 20 is fixed on the grating 10. By performing the same operation on the remaining bolts 31, the punching metal 20 is attached across the three gratings 10.

  Next, a method for removing the punching metal 20 on the grating 10 will be described. When the punching metal 20 is removed, the operator rotates the bolts 31 sequentially in the opposite direction from the punching metal 20 attached on the grating 10 to loosen the nut member 32 (so that the nut member 32 cannot be removed). loosen). When the operation of loosening the nut member 32 is completed, the operator operates the bolt 31 inserted through the mounting hole 22 from above the punching metal 20 and moves the nut member 32 loosely screwed to the bolt 31 to the position shown in FIG. ) In the state indicated by the reference numeral 32a. Then, the bolt 31 is pulled upward, the nut member 32 is inserted into the notch N formed in the mounting bracket 30, and the nut member 32 is disposed above the first flat portion 30 a of the mounting bracket 30. When the above operation is performed on all of the remaining bolts 31, the punching metal 20 can be removed from the grating 10.

  As described above, in the present embodiment, the head of the bolt 31 whose shaft portion is inserted into the mounting hole 22 formed in the punching metal 20 and the mounting bracket 30 (the first fitting 15 fixed to the main bar 11 of the grating 10). The punching metal 20 is attached to the upper surface of the grating 10 by sandwiching the first flat portion 30a of the mounting bracket 30 with the nut member 32 that is disposed on the back surface of the flat portion 30a) and screwed into the bolt 31. For this reason, attachment and removal of the punching metal 20 with respect to the grating 10 can be performed only from the upper surface side of the punching metal 20, and a scaffold for performing the operation from below the grating 10 is not required. The punching metal 20 can be attached to and removed from the metal plate without much work. Further, since the mounting bracket 30 is fixed to the main bar 11 having high strength, the punching metal 20 can be attached to the grating 10 with high strength.

[Second Embodiment]
In the first embodiment described above, the punching metal 20 is attached using the attachment fitting 30 fixed to the main bar 11 of the grating 10. On the other hand, 2nd Embodiment demonstrated below is a form which attaches the punching metal 20 using the attachment metal fitting which is latched by the main bar 11 of the grating 10, and is removable.

  FIG. 3 is a perspective view showing a cover material mounting bracket according to the second embodiment of the present invention. As shown in FIG. 3, the mounting bracket 40 as the cover member mounting bracket of the present embodiment includes a first plane portion 41, second plane portions 42a and 42b, third plane portions 43a and 43b, and a fourth plane portion 44a, 44b, which is formed of iron, stainless steel, aluminum or the like and is a metal fitting narrower than the interval between the main bars 11 of the grating 10.

  The first plane portion 41 is a portion that is directly fixed to the bolt 31, and a hole H into which the shaft portion of the bolt 31 is inserted is formed at the center portion, and the bolt is formed on the back surface thereof. A nut member Q (screw hole) to which 31 is screwed is attached concentrically with the hole H. The second plane portions 42 a and 42 b are substantially parallel to the first plane portion 41, and the first plane portion 41 is the main in the state where the mounting bracket 40 is locked to the main bar 11 of the grating 10. It is a portion that engages with the lower end of the main bar 11 in a state of being arranged at the upper end of the bar 11.

  The third plane parts 43a and 43b have the width of the main bar 11 and the length of identification, intersect the first plane part 41 and the second plane parts 42a and 42b, and the first plane part. 41 and the second plane portions 42a and 42b are connected to each other. The fourth plane portions 44a and 44b are set to have a length longer than the width of the main bar 11, and are provided on both sides of the second plane portions 42a and 42b so as to intersect the second plane portions 42a and 42b. When the mounting bracket 40 is locked to the main bar 11 of the grating 10, it is bent at the position of the upper surface of the grating 10.

  Here, either one of the fourth plane portions 44a and 44b is set to be longer than either one. In the example shown in FIG. 3, the fourth plane part 44b is formed longer than the fourth plane part 44a. This is to make it easy to lock the mounting bracket 40 to the main bar 11 of the grating 10 from the upper surface side of the grating 10. When the opening 14 of the grating 10 is large enough to allow the operator's hand to be inserted, or when the mounting bracket 40 is locked to the main bar 11 of the grating 10 using a tool such as pliers, The lengths of the fourth flat portions 44a and 44b may be the same.

  Next, a method for attaching the punching metal 20 on the grating 10 will be described. In attaching the punching metal 20 onto the grating 10, first, the operator performs an operation of attaching the mounting bracket 40 shown in FIG. 3 to a preset position of the grating 10. Specifically, the operation of locking the mounting bracket 40 to each of the main bars 11 to which the mounting bracket 30 shown in FIG. 1 is mounted is performed.

  In order to attach the mounting bracket 40 to the grating 10, the operator can end the fourth flat portion 44b of the mounting bracket 40 shown in FIG. 3 (the end opposite to the end connected to the second flat portion 42b). And the substantially entire mounting bracket 40 is disposed from the upper surface side (front surface side) of the grating 10 to the bottom surface side (back surface side) of the grating 10 through the opening 14. Next, after the mounting bracket 40 is rotated by 90 degrees in the horizontal plane, the second flat portions 42 a and 42 b are pulled upward until they contact the lower end of the main bar 11. Then, since the fourth flat portions 44a and 44b protrude from the upper surface of the grating 10, the fourth flat surfaces 44a and 44b are bent on the upper surface of the grating 10. When the above operation is performed, the mounting bracket 40 is locked to the main bar 11 of the grating 10 as shown in FIG.

  FIG. 4 is a cross-sectional view showing a state in which the cover material mounting bracket according to the second embodiment of the present invention is attached to the grating. As shown in FIG. 4, with the first flat surface portion 41 of the mounting bracket 40 being disposed at the upper end of the main bar 11, the mounting bracket 40 is engaged so that the second flat surface portions 42 a and 42 b engage with the lower end of the main bar 11. Is locked to the main bar 11 of the grating 10. The bent portions of the fourth flat portions 44a and 44b are disposed at the upper end of the main bar 11 so as to extend in the left-right direction in FIG.

  When the above operations are completed, the operator places the punching metal 20 on the grating 10, and the attachment holes 22 formed in the punching metal 20 are arranged above the attachment fittings 40 attached to the grating 10. Perform a rough alignment. When the rough alignment is completed, the operator can insert the washer 33 into the mounting hole 22 provided in the punching metal 20 from the upper surface side (front surface side) of the punching metal 20. The bolt 31 is rotated from above the punching metal 20 using, for example, a hexagon wrench, and is screwed into the nut member Q provided on the mounting bracket 40 locked to the main bar 11 of the grating 10. The operation | work which fixes 40 to the bolt 31 sequentially is performed. If all the mounting brackets 40 are fixed to the bolts 31, the punching metal 20 is attached over the three gratings 10.

  Next, a method for removing the punching metal 20 on the grating 10 will be described. When removing the punching metal 20, an operator removes the bolt 31 from the mounting bracket 40 by sequentially rotating the bolt 31 in the opposite direction from the punching metal 20 attached on the grating 10. When the removal of all the bolts 31 is completed, the punching metal 20 can be removed from the grating 10.

  As described above, in the present embodiment, the mounting bracket 40 shown in FIG. 3 is mounted on the main bar 11 from the upper surface side of the grating 10, and the bolt 31 is rotated from the upper surface side of the grating 10, so that the mounting bracket 40 is attached to the bolt 31. 40 is fixed. For this reason, similarly to the first embodiment, the punching metal 20 can be attached to and detached from the grating 10 only from the upper surface side of the punching metal 20, and a scaffold for performing the operation from below the grating 10. Therefore, attachment and removal of the punching metal 20 to the grating 10 can be performed very easily without requiring a large-scale work.

  Further, in the present embodiment, since the mounting bracket 40 is locked to the main bar 11 having high strength, the punching metal 20 can be attached to the grating 10 with high strength as in the first embodiment. Furthermore, in this embodiment, since it is not necessary to fix the mounting bracket to the grating by welding or the like, the punching metal 20 can be attached and detached more easily than in the first embodiment.

  The cover material mounting structure and the cover material mounting bracket according to the embodiment of the present invention have been described above. However, the present invention is not limited to the above embodiment, and can be freely changed within the scope of the present invention. For example, in the first embodiment, the example in which the nut member 32 is configured to contact the second flat surface portion 30b of the mounting bracket 30 when the bolt 31 is rotated has been described. However, the nut member 32 may be configured to contact the main bar 11 when the bolt 31 is rotated.

  In the second embodiment, the example in which the nut member Q that is screwed to the bolt 31 is attached to the back surface of the first flat portion 41 provided in the attachment fitting 40 has been described. However, the nut member Q may be omitted, and the hole H itself may be a screw hole that is screwed into the bolt 31. Furthermore, in the said 2nd Embodiment, you may make the 1st plane part 41 of the attachment metal fitting 40 into the form similar to the 1st plane part 30a of the attachment metal fitting 30 demonstrated in 1st Embodiment. In the case of this form, the nut member needs to have a size that abuts on the third flat portions 43a and 43b of the mounting bracket 40 when the nut member is rotated around the bolt 31.

DESCRIPTION OF SYMBOLS 10 Grating 11 Main bar 20 Punching metal 21 Opening 22 Mounting hole 30 Mounting bracket 30a 1st plane part 30b 2nd plane part 31 Bolt 32 Nut member 33 Washer 40 Mounting bracket 41 1st plane part 42a, 42b 2nd plane part 43a, 43b 3rd plane part 44a, 44b 4th plane part N Notch part Q Nut member

Claims (8)

A cover material mounting structure for mounting a cover material in which a large number of openings smaller than the interval between the main bars are formed on the upper surface of the grating having a plurality of main bars arranged,
It has a mounting bracket that is locked or fixed to the main bar,
A cover material mounting structure for mounting the cover material to the upper surface of the grating by fixing the mounting bracket to a bolt whose shaft portion is inserted into a mounting hole formed in the cover material. . The mounting bracket is an L-shaped bracket composed of a first flat portion disposed on an upper end of the main bar and a second flat portion fixed to the main bar,
The mounting bracket is fixed to the bolt by sandwiching the first flat portion between a head of the bolt and a nut member disposed on the back surface of the first flat portion and screwed into the bolt. The cover material mounting structure according to claim 1. The first flat surface portion has a notch portion into which a nut member screwed into the bolt inserted into the mounting hole is inserted.
The cover material according to claim 2, wherein the nut member is sized to abut against at least one of the second flat portion of the mounting bracket and the main bar when rotated about the bolt. Mounting structure. The mounting hole provided in the cover material has an inner diameter larger than the head of the bolt,
The cover material mounting according to any one of claims 1 to 3, wherein the bolt is inserted into the mounting hole through a washer having an outer diameter larger than an inner diameter of the mounting hole. Construction. The mounting bracket is narrower than the interval between the main bars,
A first flat portion disposed on an upper end of the main bar and fixed to the bolt;
A second planar portion that engages with a lower end of the main bar in a state where the first planar portion is disposed at an upper end of the main bar;
A third plane part having a length approximately equal to the width of the main bar and connecting the first plane part and the second plane part across the first and second plane parts;
A fourth plane part that is set longer than the width of the main bar, is provided on both sides of the second plane part so as to intersect the second plane part, and is bent at the position of the upper surface of the grating. The cover material mounting structure according to claim 1.   The cover material mounting structure according to claim 5, wherein the first flat portion is provided with a screw hole into which the bolt is screwed. The first flat surface portion has a notch portion into which a nut member screwed into the bolt inserted into the mounting hole is inserted.
The cover member mounting structure according to claim 5, wherein the nut member is sized to abut on a third flat surface portion of the mounting bracket when rotated about the bolt. In the cover material mounting bracket for attaching a cover material in which a large number of openings smaller than the interval between the main bars are formed on the upper surface of the grating including a plurality of main bars arranged,
It is narrower than the interval between the main bars,
A first flat portion fixed to the bolt at the upper end of the main bar;
A second planar portion that engages with a lower end of the main bar in a state where the first planar portion is disposed at an upper end of the main bar;
A third plane part having a length approximately equal to the width of the main bar and connecting the first plane part and the second plane part across the first and second plane parts;
A fourth plane part that is set longer than the width of the main bar, is provided on both sides of the second plane part so as to intersect the second plane part, and is bent at the position of the upper surface of the grating. Cover material mounting bracket.

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