JP2009097311A - Mounting structure of grating - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grating mounting structure applicable to a conventional grating without making any improvement of the grating while taking low cost antitheft measures without needing fittings such as connecting metal fittings. <P>SOLUTION: The grating 1 is provided with a plurality of mounting through-holes 15a, while female thread members 5 or male thread members 6 are disposed and fixed to a side ditch 2 into opposite positions to the through-holes when placing the grating 1 on the side ditch 2. The grating 1 is placed on the side ditch 2, and mounting bolts 7 are screwed to the female thread members 5 through the respective through-holes 15a, or mounting nuts 8 are screwed to the male thread members 6 to fix the grating 1 to the side ditch 2. Out of these mounting bolts 7 or mounting nuts 8, a head 70 of at least one mounting bolt 7 or the mounting nut 8 is formed into a deformed body K provided with protrusions 70b, 80b, and the mounting bolt 7 or mounting nut 8 can be mounted/removed only with an exclusive tool 9 fitted to the deformed body. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mounting structure for a grating disposed in a side groove or the like.

  Grating is used to improve drainage in road side grooves (rainwater grooves) and the like, and metal gratings are generally used frequently from the viewpoint of strength. However, because the grating is made of metal, news of theft is being reported all over the country as the price of metal rises. Several proposals have been made for gratings intended to prevent theft (for example, Patent Documents 1 to 3).

JP 2006-336345 A JP-A-9-250165 Utility Model Registration No. 3133644

  However, any of the inventions of Patent Documents 1 to 3 enable the removal of the grating as long as time is required. Once the structure was understood, there was a risk of being removed skillfully. Further, Patent Documents 1 and 3 are gratings obtained by improving a general-purpose type, and it is troublesome because a different grating from a general-purpose product must be manufactured. Since it is not versatile, the application range may be limited. Further, in Patent Document 2, a connection fitting must be prepared separately from the grating, which increases the cost.

  The present invention solves the above-mentioned problems, enables perfect theft prevention at low cost without the need for metal fittings such as connecting metal fittings, further improves the grating, and does not improve the conventional grating. It is an object of the present invention to provide an applicable grating mounting structure.

In order to achieve the above object, the gist of the invention described in claim 1 is that a plurality of mounting through holes are provided in the grating, while the side grooves are placed in the side grooves of the grating so as to face the through holes. A female screw member or a male screw member is disposed and fixed to
The grating is placed in the side groove, and the grating is fixed to the side groove by screwing a mounting bolt to the female screw member through each through hole or by screwing a mounting nut to the male screw member, and mounting them. Among the bolts or mounting nuts, the head or the mounting nut related to at least one mounting bolt is a modified body provided with a protrusion or a concave groove, and the mounting bolt or The mounting structure of the grating is characterized in that the mounting nut can be mounted and removed.
According to a second aspect of the present invention, there is provided a grating mounting structure according to the first aspect, wherein the head or the mounting nut relating to at least one of the mounting bolts is a deformed body provided with a projection, and the projection is the mounting bolt. It is provided in the side part of the head which concerns on, or the side part of the said attachment nut, It is characterized by the above-mentioned.

As in the first aspect of the invention, the grating is fixed to the side groove by screwing a mounting bolt to the female screw member or by screwing a mounting nut to the male screw member, and at least of these mounting bolts or mounting nuts. If the head or the mounting nut related to one or more mounting bolts is a deformed body provided with protrusions, once the grating is fixed to the side groove, the grating cannot be removed unless it is a dedicated jig fitted to the deformed body. Even if one of a plurality of mounting bolts or mounting nuts is used instead of regular hexagonal bolts or nuts, a specially shaped mounting bolt or mounting nut that is deformed by providing a projection is not provided. It becomes impossible to remove. It is effective at preventing theft at low cost without adding any improvements to the grating or preparing a connecting bracket. In addition, when the grating is fixed to the side groove through the through hole, it is not necessary to improve the grating. Therefore, any grating having a through hole can be applied to an existing grating.
As described in claim 2, when the projection is provided on the side surface portion of the head related to the mounting bolt or the side surface portion of the mounting nut, the deformed body and the dedicated jig can be manufactured easily and inexpensively.

  The mounting structure of the grating according to the present invention, when the grating is mounted to the side groove through the mounting through-hole, with a bolt or nut, at least one of the bolt or nut is a modified mounting bolt having a key function or Because it is a structure that can be attached with a mounting nut, it cannot be removed unless it is a dedicated jig fitted to it, making it possible to prevent perfect theft, and it can be applied even with conventional general-purpose gratings. Demonstrate.

Hereinafter, the mounting structure of the grating according to the present invention will be described in detail.
(1) Embodiment 1
1 to 4 show an embodiment of the grating mounting structure according to the present invention. FIG. 1 is an exploded perspective view showing the grating mounting structure. FIG. 2 shows the positions of the female screw member, the through hole and the mounting bolt in FIG. FIG. 3 is a plan view of the grating in which the attachment position of the deformed body to the through hole is added, and FIG. 4 is a plan view of the grating of FIG. It is a longitudinal cross-sectional view of the surroundings of a mounting bolt in the state fixed to the side groove.

  In the present embodiment, the grating 1 is provided with a plurality of through holes 15a for attaching the grating 1 to the side groove, while the female screw member 5 is disposed on the grating mounting receiver 4 (hereinafter simply referred to as "receiver") in the side groove. It is fixed. The grating 1 is fixed to the side groove 2 by placing the grating 1 on the receptacle 4 of the side groove 2 and screwing the mounting bolt 7 to the female screw member 5 through each through hole 15a. Then, the head 70 relating to at least one (here, one) of the mounting bolts 7 among these mounting bolts 7 is defined as a deformed body K having a main portion 70a provided with a projection 70b, and fitted into the deformed body K. A grating mounting structure that enables the mounting bolt 7 to be attached to and detached from the deformed body K only by the dedicated jig 9 to be combined.

  The grating 1 used here is a general-purpose grating as shown in FIGS. The metal grating 1 is formed as a rectangular disk having a standardized overall shape, and includes a main member 12, a connecting member 13, a side plate 10, an end plate 11, and a mounting partition plate 14. A main member 12 made of a large number of metal strips and a connecting member 13 orthogonal to the main member 12 are formed in a lattice shape and surrounded by a side plate 10 (FIG. 3). The both ends of the main member 12 are end plates 11 and are rectangular boards. The connecting member 13 is also called a cross bar, and is composed of a twisted bar in which a metal bar is twisted. The connecting members 13 are placed on the upper surface of the main member 12 with a predetermined interval so as to be orthogonal to them after securing a state in which the main member 12 is vertically erected in the band width direction and arranged in a predetermined pitch. The Thereafter, the main member 12 and the connecting member 13 are assembled into a rectangular board having a grid shape by electric pressure fixing. Symbol SL indicates a slit which is a lattice hole. Further, the rectangular plate is cut out at the four corners of the main member 12, and a partition plate 14 is fixed to the cut-out main member 12, and the partition plate 14, the main member 12, and the side plate 10 are attached. Mouth 16 is formed. Then, as shown in FIGS. 3 and 4, a mounting plate 15 made of a plate piece is horizontally fixed to each lower edge of the side plate 10, the main member 12, and the partition plate 14 that form a void of the mounting port 16. The mounting port 16 is closed by a mounting plate 15 that is horizontally disposed so as to fit the lower surface of the rectangular board. A through-hole 15a is formed in the center of each mounting plate 15, and the main grating 1 fixed to the side groove 2 is completed. The grating 1 is fixed to the side groove 2 by screwing a mounting bolt 7 to a female screw member 5 disposed and fixed to the receiving body 4 on the side groove 2 side through the through hole 15 a of the mounting plate 15.

The side groove 2 includes a side groove body 3, a receiver 4, and a female screw member 5. A side groove 2 in which a receiving body 4 having a metal female screw member 5 fixed thereto is integrated with a concrete side groove body 3 having a U-shaped cross section.
The side groove body 3 has a U-shaped cross section in which a flow path 35 such as rainwater is secured on both side walls 31 and the bottom wall 30, and a step surface 32 is formed on the upper side of the side walls 31. The grating mounting receiver 4 is integrated with both step surfaces 32.
The receiver 4 includes a frame main body 41, a horizontal member 42, and an anchor 43, and is a metal receiving frame as shown in FIG. The frame main body 41 is made of L-shaped steel cut to a length that substantially matches the length of the side plate 10 according to the grating 1. The two frame bodies 41 are welded and fixed to the horizontal member 42 at both ends to form a rectangular frame receiver 4 that can be smoothly placed on both step surfaces 32 of the side groove body 3. In FIG. 3, illustration of the horizontal member 42 is omitted for easy understanding of the drawing. The receiving body 4 is disposed such that the horizontal portion 411 is placed on the step surface 32 of the side groove main body 3 and the upright portion 412 is in contact with the standing wall 34 from the step surface 32 toward the side groove main surface 33 (FIG. 1). A through hole 41a is formed in the horizontal portion 411 of the receiver 4 at a location corresponding to the through hole 15a. The female screw member 5 is disposed and fixed on each lower surface of the horizontal portion 411 provided with the through hole 41a so that the female screw hole 52 is aligned with the through hole 41a. In FIG. 4, reference numeral WD indicates a fixed portion by welding. Further, a plate-like anchor 43 that is inclined downward is welded and fixed to the outer surface of the standing portion 412 of the frame body 41. When the side groove main body 3 of the side groove 2 is concrete-molded, the anchor is embedded in the side groove main body 3 so that the receiver 4 and the side groove main body 3 are integrated into the side groove 2. Thus, when the grating 1 is placed in the side groove 2, the side groove 2 in which the female screw member 5 is disposed and fixed on the side groove 2 side of the position opposite to the through hole 15 a of the grating 1 is completed.

Thus, the grating 1 is fixed to the side groove 2 by placing the grating 1 in the side groove 2 and screwing the mounting bolt 7 to the female screw member 5 through the through holes 15 a of the mounting plate 15. In the conventional simple mounting bolt 7, that is, the general-purpose bolt BT, even if the grating 1 is fixed to the side groove 2, anyone can easily remove it. Anti-theft measures have not been taken.
On the other hand, in the present invention, as shown in FIG. 1, at least one of the four mounting bolts 7 (here, four) that attach the grating 1 to the side groove 2 through the through holes 15a of the mounting plates 15 at the four corners of the grating. The head 70 relating to one or more (here, one) mounting bolts 7 is a variant K provided with a projection 70b. Then, the grating 1 is attached to the side groove 2 that enables the attachment bolt 7 to be attached and detached only by the dedicated jig 9 fitted to the deformed body.

The mounting bolt 7 is made of metal such as iron or stainless steel, and includes a head portion 70 and a shaft portion 71 as in a general-purpose bolt BT that is usually used, and a male screw portion 72 is formed on the shaft portion. However, of the four mounting bolts 7 for mounting the grating 1 to the side groove 2 via the mounting plates 15 at the four corners of the grating, one of the heads 70 is a special lock variant K as shown in FIGS. To do. The deformed body K of the head 70 here is obtained by integrating the main portion 70a, the flange 70d, and the projection 70b. Unlike the head portion of the general-purpose bolt BT having a hexagonal column (hexagonal shape), the main portion 70a has a cylindrical shape (circular shape). The cylindrical shape is slightly smaller than the hexagonal column in plan view. Then, a flange 70d projecting outward at the lower edge of the main portion 70a is provided, to project the rib-like protrusion 70b protruding horizontally outward further to the main unit side portion 70a _1. Projection 70b is formed by protruding a protruding portion outward from the main portion side portion 70a ₁ in a plan view as in FIG. Projection 70b is multiply provided at predetermined intervals from the main unit side portion 70a ₁ radially. The lower part of the projection 70b is coupled to the flange 70d. Except for the region of the flange 70d, the region of the head 70 where the main portion 70a and the projection 70b are provided has substantially the same cross-sectional shape in the vertical direction. As shown in FIG. 2, the dedicated jig 9 vertically descends from above the deformed body K as shown by the arrow and fits deeply and sufficiently into the deformed body K, thereby smoothly mounting and removing the deformed body K by the dedicated jig 9. Because. Unlike JIS standard bolt heads such as hexagons, the projection 70b is provided on the main portion 70a, which is the base portion, so that the deformed body K is deformed from the general bolt head. Therefore, the removal becomes impossible. The mounting structure of the grating 1 is such that the mounting bolt 7 can be mounted and removed only by the dedicated jig 9 as shown in FIG. 2 fitted to the deformed body K provided with the projection 70b. Reference numeral 70c denotes a recess made in the said protrusion 70b by the formation of projections 70b and the main portion side portion 70a _1.

Various protrusions K can be easily made by changing the shape, size, number, etc. of the protrusions 70b. Because of the presence of the projection 70b, after the deformed body K and the dedicated jig 9 are fitted, when the dedicated jig 9 is turned, the dedicated jig 9 is locked to the projection 70b, and the mounting bolt 7 can be easily attached. Can be installed or removed. By protrusion 70b of the convex portion from the main unit side portion 70a ₁ is formed with a plurality of radially, locking of the special tool 9 to the projection 70b is further enhanced. Incidentally, the mounting bolt 7 of the deformed body K is not cut off the male screw portion 72 near the head portion 70 as shown in FIG. 4, but the shaft portion 71 is left partially, but the male screw portion 72 is formed over the entire length of the shaft portion. You can also

Here, the protrusion 70b is instead a side surface portion 70a ₁ of the main portion 70a, it may be provided on the upper surface portion of the main portion 70a. However, the person who provided the projections 70b on the main unit side portions 70a _1, without requiring to form a deep engaging portion 91 of the dedicated jig 9 unlike the case where the main unit 70a upper surface providing the projections 70b, also, It is more preferable because the protrusion 70b can be easily manufactured. A concave fitting portion 91 that fits into the deformed body K is formed inside the lower end opening of the columnar jig main body 90 of the dedicated jig 9. Further, on the outside of the upper end of the jig main body 90, an engagement portion 92 with a general-purpose wrench that allows the special jig 9 fitted to the deformed body K to rotate smoothly, for example, a hexagonal columnar shape as shown in the figure. A head is formed. The engaging portion 92 is not limited to the shape as shown in FIG. 2, but may be a square pole as shown in FIG. In addition, it is structurally possible to form a concave groove in place of the main projection 70b. By providing a concave groove in the columnar main portion 70a serving as a base portion, the deformed body K is deformed from a general bolt head, and it is impossible to attach and remove the deformed body K with a commercially available general-purpose wrench. The mounting structure of the grating 1 is such that the mounting bolt 7 can be attached or removed only by a dedicated jig fitted to the cylindrical main portion and the deformed body K provided with the concave groove. However, the protrusion 70b is more preferable. This is because if the concave groove is formed, dust and rainwater are likely to accumulate, and it may be difficult to remove the deformed bolt using the special jig 9.

  Next, a procedure for attaching the grating 1 to the side groove 2 will be described. The grating 1 is placed on the receptacle 4 of the side groove 2 so that the through holes 15a at the four corners of the grating are aligned with the through holes 41a provided in the side groove 2. 1 to 3, the mounting bolt 7 having the head of the deformed body K is inserted from above the grating 1 into the through hole 15a at the upper left corner and the through hole 41a of the side groove 2. Then, the mounting bolt 7 is screwed into the female screw member 5 located below the dedicated bolt 9 to fix the grating 1 to the side groove 2. Since the dedicated jig 9 that fits into the deformed body K is used, even the mounting bolt 7 of the deformed body K can be screwed onto the female screw member 5 without difficulty. For the other three through holes 15a, the general-purpose bolts BT are inserted in the same manner as in the past, and the general-purpose bolts BT are screwed into the respective female screw members 5 below them using a general-purpose wrench. 1 is fixed to the side groove 2. Only by this, the mounting of the grating 1 to the side groove 2 is completed, and the mounting structure of the grating 1 of the present invention is obtained.

  The mounting structure of the grating 1 configured in this manner is stolen because once the grating 1 is attached to the side groove 2, the grating 1 cannot be removed from the side groove 2 without the dedicated jig 9 fitted to the deformed body K. There is no danger to meet. Unlike the head of the general-purpose bolt BT, the deformed body K has a special lock shape by the projection 70b. A key fitting mechanism is constituted by the deformed body K corresponding to the key (key) and the dedicated jig 9 corresponding to the key hole. Even if the structure is complicated, unlike in Patent Documents 1 and 3 where the grating 1 is removed from the side groove 2 when the structure is understood, a jig that sees the deformed body K and fits it is built on site. It is almost impossible to try. Further, it is not necessary to prepare a separate connection fitting, and it is sufficient to replace at least one of the mounting bolts 7 for mounting the grating 1 in the side groove 2 with the mounting bolt 7 of the deformed body K provided with the projection 70b on the head 70. The mounting structure of the grating 1 is inexpensive. One of the mounting bolts 7 for fixing the grating 1 to the side groove 2 may be replaced by the mounting bolt 7 of the deformed body K instead of the general-purpose bolt BT. Nevertheless, the mounting structure of the anti-theft grating 1 is almost perfect. In addition, the projection 70b can be easily reshaped by changing its shape, size, etc., and it becomes a rock stone system against theft without much cost.

On the other hand, when the administrator of the grating 1 needs to remove the grating 1 for maintenance or the like, it can be easily removed even if the dedicated jig 9 is used. The fitting part 91 is fitted to the deformed body K so that the special jig 9 is put on the head 70 of the deformed body K, and then the engaging part 92 is simply turned using a general-purpose wrench. Excellent workability for attaching and removing the grating 1
Furthermore, unlike the configuration in which the conventional general-purpose grating 1 cannot be used as in Patent Document 3, even if it is a general-purpose grating 1 or a grating 1 that has already been attached, an attachment with a through hole 15a is provided. If the grating 15 has the plate 15, the mounting structure of the grating 1 can be applied, and a great effect can be obtained.

(2) Embodiment 2
5 to 7 show one form of the mounting structure of the grating 1 different from that of the first embodiment. FIG. 5 shows the positional relationship between the male screw member, the through hole and the mounting nut, and a dedicated jig fitted to the mounting nut. FIG. 6 is a perspective view of a mounting nut according to another mode instead of the mounting nut of FIG. 5, FIG. 7 is a plan view of FIG. 6, and FIG. 8 is a different mode view different from FIGS.

  In the present embodiment, a male screw member 6 is disposed and fixed on the receptacle 4 on the side groove 2 side in place of the female screw member 5 of the first embodiment. A male screw member 6 is disposed and fixed on the grating mounting receiver 4 on the side groove 2 side at the position facing the through hole 15a when the grating 1 is placed in the side groove 2. As shown in FIG. 5, the male screw portion 63 penetrates the through hole 41 a from below the horizontal portion 411 of the receiving body 4 and protrudes upward so that the male screw portion 63 stands vertically, and the head 61 of the male screw member 6 faces the bottom surface of the horizontal portion 411. Fixed by welding. Note that the male screw portion 63 of the male screw member 6 is provided only at the tip portion of the shaft portion 62, but may of course be provided over the entire length of the shaft portion. The configuration of the other side grooves 2 and the configuration of the grating 1 are the same as those in the first embodiment and will not be described. The same reference numerals as those in the first embodiment denote the same or corresponding parts.

  Then, the grating 1 is placed in the side groove 2, and the grating 1 is fixed to the side groove 2 by screwing the mounting nut 8 to the male screw member 6 through each through hole 15a. Of these, at least one mounting nut 8 is a variant K provided with a projection 70b.

  The mounting nut 8 is made of a metal such as iron or stainless steel, like a commonly used general-purpose nut, and has a female threaded portion 82 passing through the nut body 80. However, among the four mounting nuts 8 for mounting the grating 1 to the side groove 2 through the through holes 15a of the mounting plates 15 at the four corners of the grating, at least one (here, one) has its nut body 80 modified as shown in FIG. Let it be body K. The deformed body K here is a nut body 80 provided with a flange 80d and a projection 80b. The outer shape of the deformed body K is substantially similar only by replacing the nut body 80 with the deformed body K of the first embodiment. Unlike the hexagonal column (hexagonal) outer shape of the general-purpose nut, the nut body 80 has a cylindrical (circular) shape. The cylindrical shape is slightly smaller than the hexagonal column in plan view. Then, a flange 80d projecting outward is provided on the lower edge of the nut body 80, and a rib-like protrusion 80b extending in the horizontal outward direction is provided on the side surface portion 80a of the nut body 80. The protrusion 80b is formed by projecting a convex portion outward from the main body side surface portion 80a in plan view. A plurality of protrusions 80b are provided radially from the side surface portion at a predetermined interval. The lower part of the protrusion 80b is coupled to the flange 80d. Except for the region of the flange 80d, the region of the nut body 80 where the protrusion 80b is provided has a substantially equal cross-sectional shape in the vertical direction. As shown in FIG. 5, the dedicated jig 9 is vertically lowered from above the deformed body K as shown by the arrow so as to be deeply and sufficiently fitted to the deformed body K. It is for smoothing. By providing the protrusion 80b, a commercially available general-purpose wrench cannot be used. Unlike a JIS standard nut such as a hexagon, a protrusion 80b is provided on the nut body 80, which is a base portion, so that a deformed body K is deformed from a general nut. Removal becomes impossible. The mounting structure of the grating 1 is such that the mounting nut 8 can be attached and detached only by the dedicated jig 9 as shown in FIG. 5 fitted to the deformed body K provided with the projection 80b. Reference numeral 83 denotes a through hole of the mounting nut 8 according to the variant K. Reference numeral 80c denotes a recess formed by the protrusion and the main body side surface portion 80a by forming the protrusion 80b.

As shown in FIG. 5, the protrusions 80b are formed radially from the side surface portion of the nut main body 80, whereby the engagement of the dedicated jig 9 to the protrusions 80b is strengthened. Etc. may be changed. FIGS. 6 and 7 show different embodiments in which the number of protrusions 80b is different from that of FIG. Of course, even if the mounting nut 8 of such a variant K is used, it becomes the mounting structure of the grating 1 of this invention.
Further, the mounting nut 8 can be a cap nut type variant K as shown in FIG. The mounting nut 8 of the deformed body K shown in FIG. 8 is provided with a flange 80d and a protrusion 80b on a nut body 80 provided with a female screw portion 82, as in FIG. However, unlike FIG. 5, the upper part of the nut is covered with a crowned part 85 in a hat shape so that the female screw part 82 does not penetrate upward. Since the female threaded portion 82 is covered with the crowned portion 85, even if the mounting nut 8 of the deformed body K is screwed with the male threaded portion of the male threaded member and attached to the grating, There is an advantage that sand and sand do not enter. 8 is a cap nut type, the shaft portion 62 and the male screw portion 63 of the male screw member 6 are limited in length.

Since the external shape of the modified body K of the mounting nut 8 and the mounting bolt 7 is substantially the same, the dedicated jig 9 of this embodiment has the same fitting portion as the fitting portion 91 of Embodiment 1 as shown in FIG. 91 is formed. The cap nut type exclusive jig of FIG. 8 becomes the fitting part 91 to which the corresponding part of the crowned part 85 is added. On the other hand, on the outside of the upper end of the jig main body 90, two engaging portions 92 with a general-purpose wrench capable of operating the dedicated jig 9 after being fitted to the mounting nut 8 are provided. In addition to the engaging portion 92 corresponding to the hexagonal wrench, the dedicated jig 9 is provided with a second engaging portion 93 corresponding to the quadrangular wrench thereon.
Also in this embodiment, it can also be set as a ditch | groove instead of the protrusion 80b. Since the cylindrical nut main body 80 is provided with a concave groove as the outer shape of the base body portion, the deformed body K is deformed from the general nut, and it is impossible to attach and remove the deformed body K with a commercially available general-purpose wrench. The mounting structure of the grating 1 is such that the mounting nut 8 can be mounted or removed only by a dedicated jig fitted to the deformed body K provided with the concave groove. However, the protrusion 80b is more preferable. This is because if the concave groove is formed, dust and rainwater are likely to accumulate, and it may be difficult to remove the deformed bolt using a special jig.

  Next, a procedure for attaching the grating 1 to the side groove 2 will be described. The grating 1 is placed on the receiving body 4 of the side groove 2 so that the through holes 15a at the four corners of the grating are aligned with the through holes 41a of the side groove 2. As shown in FIG. 5, the male screw member 6 protrudes from the through hole 15 a in the upper left corner of the grating 1. The mounting nut 8 of the deformed body K is screwed into the male screw portion of the male screw member 6 using a hand and a dedicated jig 9 to fix the grating 1 to the side groove 2. Since the dedicated jig 9 fitted to the deformed body K is used, the mounting nut 8 of the deformed body K can be screwed and fixed to the male screw member 6 without difficulty. About the other three through-holes 15a of the grating 1, a general-purpose nut is screwed into the male screw part 63 of each male screw member 6 by using a general-purpose wrench as in the prior art, and the grating 1 is fixed to the side groove 2. Only by this, the mounting of the grating 1 to the side groove 2 is completed, and the mounting structure of the grating 1 of the present invention is obtained.

  The mounting structure of the grating 1 configured in this way is the same as that of the first embodiment except that the deformed body K is replaced by the nut body 80 of the mounting nut 8 instead of the head 70 of the mounting bolt 7 of the first embodiment. An effect is obtained. Once the grating 1 is attached to the side groove 2, the grating 1 cannot be removed from the side groove 2 without the dedicated jig 9 fitted to the deformed body K, so there is no possibility of being stolen. It is sufficient that one of the plurality of mounting nuts 8 for screwing and fixing the grating 1 to the side groove 2 is the mounting nut 8 of the deformed body K. The mounting structure of the grating 1 can cope with a low cost. Nevertheless, the mounting structure of the grating 1 is provided with almost perfect antitheft measures. Further, when the cap nut type deformed body K as shown in FIG. 8 is used, the mounting nut 8 of the deformed body K is screwed into the male screw member 6, and even if the grating 1 is used for many years, The mounting nut 8 can be easily removed. The female thread portion 82 is covered with the crowned portion 85, so that rainwater does not enter the threaded portion and the threaded portion is not rusted. Moreover, since dust, sand, or the like does not enter the threaded portion, the mounting nut 8 can be loosened easily. The problem that it is difficult to remove the mounting nut while being often placed outdoors can be solved, making maintenance maintenance easier. Other effects are the same as those of the first embodiment, and a description thereof is omitted.

  The present invention is not limited to those shown in the above-described embodiment, and various modifications can be made within the scope of the present invention depending on the purpose and application. The shape, size, number, material, and the like of the grating 1, the mounting plate 15, the side groove 2, the receiver 4, the female screw member 5, the male screw member 6, the mounting bolt 7, and the mounting nut 8 can be appropriately selected according to the application.

FIG. 3 is an explanatory exploded perspective view showing a mounting structure of the grating according to the first embodiment. FIG. 2 is an explanatory perspective view of a positional relationship among the female screw member, the through hole, and the mounting bolt of FIG. 1 and a dedicated jig that is fitted to the mounting bolt. It is a top view of the grating with which the attachment position to the through-hole by an attachment bolt was added. It is a longitudinal cross-sectional view in the state which the grating of FIG. 1 was fixed to the side groove in the position of the attachment bolt of a deformed body. It is an explanatory perspective view of the position of a male screw member of Embodiment 2, a through-hole, and a mounting nut, and an exclusive jig fitted to the mounting nut. FIG. 6 is a perspective view of another embodiment of the mounting nut instead of the mounting nut of FIG. 5. FIG. 7 is a plan view of FIG. 6. FIG. 6 is an explanatory perspective view of another embodiment of the mounting nut in place of the mounting nut of FIG. 5, the positional relationship between the male screw member and the through hole, and a dedicated jig fitted to the mounting nut.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grating 15a Through-hole 2 Side groove 5 Female thread member 6 Male thread member 7 Mounting bolt 70 Head 7a ₁ Main part side surface part (side surface part)
70b Protrusion 8 Mounting nut 80a Side face part of main body (side face part)
80b Protrusion 9 Dedicated jig K Profile

Claims (2)

A plurality of mounting through holes are provided in the grating, and a female screw member or a male screw member is disposed and fixed to the side groove in a position opposite to the through hole by being placed in the side groove of the grating.
The grating is placed in the side groove, and the grating is fixed to the side groove by screwing a mounting bolt to the female screw member through each through hole or by screwing a mounting nut to the male screw member, and mounting them. Among the bolts or mounting nuts, the head or the mounting nut related to at least one mounting bolt is a modified body provided with a protrusion or a concave groove, and the mounting bolt or Grating mounting structure that enables mounting nuts to be removed. The head or the mounting nut related to at least one of the mounting bolts is a deformed body provided with a projection, and the projection is provided on a side surface portion of the head related to the mounting bolt or a side surface portion of the mounting nut. The grating mounting structure according to claim 1.

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