Grating fixing holder

Abstract

To provide a fixing retainer for a grating that reduces the number of component parts to achieve cost reduction.SOLUTION: A fixing retainer for a grating comprises: a base member 2 fixed and attached to a pair of adjacent main members 11 of a grating 1; a nut-attached pressing member 4, in which a second plate part 42 bending toward a back surface at an inner obtuse angle when viewed from the front extends from a tip side of a first plate part 41 having a through-hole, having a nut 5 integrally fastened to the back surface of the first plate part with a center of a hole opening of the through-hole aligned with the center of a hole opening of a female threaded hole; and a bolt 6 screwed into the nut with a bolt head disposed on an upper surface side of a flat plate part and a bolt shaft loosely inserted into a permeation-hole and the through-hole. With respect to a gutter covered with the grating, the fastening of the bolt inserted through the permeation-hole and the through-hole and the nut brings a surface-side base end of the first plate part into contact with a lower surface of the flat plate part, and with this contact portion as a fulcrum, the second plate part rotates upward and protrudes laterally, thereby pressing a side wall 81 of the gutter.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a fixing holder for a grating that covers the mouth of a street gutter. [Background technology]

[0002] For example, the upper opening 80 of a gutter 8 laid on a road surface or the like shown in Figure 13 is blocked with a grating m or the like consisting of a main member d, a crossbar e, and a side support member f, allowing walking and vehicles to pass over it. The figure shows a drop-in type grating m placed on the stepped surface 812 of the side wall of the gutter 8, but a grating m that is simply placed on top of it would cause rattling noise when vehicles were passing by and would even bounce up. One solution would be to bolt the grating m to the gutter 8, but this would require elaborate work to secure it to both the grating m and the gutter 8, which was cumbersome. Furthermore, in the case of the U-shaped gutter shown in Figure 2, it would be difficult to even work on the gutter 8. For this reason, several grating fixing devices have been proposed (for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-31629 [Patent Document 2] Utility Model Registration No. 3028074 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 states in claim 2 that "the lifting member is rotatably supported horizontally at one end by the mounting member, ..." and also in paragraph 0030 that "the lifting member 12 has, at one end on the opposite side, a wide bearing portion 12c with a bearing hole 12b. Bolts 14a are inserted into bearing holes 11c and 12b and fixed with nuts 14b, whereby the lifting member 12 is rotatably supported horizontally by the mounting member 11," which makes the structure more complicated. In Patent Document 2, the structure of claim 1 states "...the leg pieces are pushed open outward by the leg-opening member that rises when the bolt is tightened..." and is similar to that of Patent Document 1, as stated in paragraph 0009, "...axial holes are drilled in the H-shaped steel, and axles 7 are passed through leg pieces 6a and 6b to connect them to the H-shaped steel.", and as is clear from the drawings, the structure is more complex. As described above, the leg pieces 6a and 6b of Patent Document 2 and the lifting member 12 of Patent Document 1 (corresponding to the pressing member of the present invention) are configured to be rotatably supported at one end, which makes the components complex and increases the cost.

[0005] The present invention is intended to solve the above problems, and has as its object to provide a grating fixing holder that reduces the number of components and reduces costs. [Means for solving the problem]

[0006] In order to achieve the above object, a first aspect of the present invention provides a base member having a flat plate portion formed with through holes and attached to a pair of adjacent main members of a grating, a pressing member having a plate-like piece disposed on the underside of the flat plate portion, the pressing member being a first plate portion having a through hole and a second plate portion extending from the tip end side of the first plate portion having a through hole and bent toward the back surface side at an obtuse angle in front view, the pressing member having a nut fixed integrally to the back surface of the first plate portion, the center of the opening of the through hole and the opening of the female screw hole being aligned; A grating fixing holder is provided with a bolt whose head is arranged on the upper surface side of the plate portion and whose bolt shaft is loosely inserted into the through-hole and the through-hole and screwed into the nut, and when the bolt loosely inserted into the through-hole and the through-hole and the nut are tightened together, the base end on the surface side of the first plate portion hits the underside of the flat plate portion in relation to a gutter covered with grating, and the second plate portion moves upward and rotates so as to protrude laterally with this hitting part as a fulcrum, pressing against the side wall of the gutter. A second aspect of the present invention is characterized in that, in the first aspect, the nut-equipped pressing member has a tip portion that bends downward in a front view from a flat main portion of the second plate portion that is connected to the first plate portion. A third aspect of the present invention is characterized in that, in the second aspect, the lower surface of the flat portion of the base member is horizontally disposed above the lower edge of the sash width surface where the pair of adjacent main members that are raised in the sash width direction face each other, the base member is attached and fixed to the main members by welding, and the first plate portion of the nut-equipped pressing member enters between the pair of main members so as to approach or abut against the lower surface of the flat portion from below the grating, and the sash width surface of the main member prevents the nut-equipped pressing member from rotating together with the pair of main members when the bolts are tightened. A fourth aspect of the present invention is characterized in that, in the second aspect, the base member is divided into a first base member and a second base member, and the through holes are formed in the flat plate portions of the first base member and the second base member, so that a pair of adjacent main members are sandwiched between the first base member and the second base member from above and below, and by tightening the bolts, the first base member and the second base member associated with the base member are removably attached and fixed to the main members. A fifth aspect of the present invention is characterized in that, in the fourth aspect, the longitudinal length of the second base member is made smaller than the groove width of the gutter, and the through holes are formed near both ends in the longitudinal direction, and the first base member, the nut-equipped pressing member, and a pair of bolts are provided, and a pair of adjacent main members are sandwiched from above and below between the upper first base member and the lower second base member at respective locations near one end and the other end where the through holes are formed of the second base member arranged in the groove width direction of the gutter, and when the bolts are tightened, the front-side base end of the first plate portion abuts against the underside of the flat plate portion of the second base member, and each of the second plate portions moves upward and rotates so as to protrude laterally with this abutting portion as a fulcrum, pressing against both side walls of the gutter. A sixth aspect of the present invention is characterized in that, in the second or fifth aspect, the flat plate portions are horizontally attached and fixed to both lower end surfaces of a pair of adjacent main members that are raised in the band width direction, and a protruding piece portion is further provided that protrudes downward from one side edge of the flat plate portions, and the protruding piece portion prevents the nut-equipped pressing member from rotating together with the bolt when the bolt is tightened. [Effects of the Invention]

[0007] The grating fixing holder of the present invention is not only applicable to gratings placed on U-shaped gutters, but also has excellent effects such as reducing the number of components and simplifying the structure of each component, thereby reducing costs. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a plan view showing a base member attached and fixed to a grating in the first embodiment. [Figure 2] FIG. 2 is a side view showing the grating with base member of FIG. 1 being placed on a side ditch. [Figure 3] 2 is a cross-sectional view showing a state in which a bolt loosely inserted into a through-hole of a base member and a through-hole of a pressing member in FIG. 1 begins to be screwed into a nut. [Figure 4] 4 is a cross-sectional view showing the state in which the second plate portion presses against the side wall of the gutter by tightening the bolt and nut from the state shown in FIG. 3. FIG. [Figure 5] FIG. 5 is a cross-sectional view of another embodiment that replaces FIG. 4. [Figure 6] FIG. 2 is a perspective view of a pressing member with a nut. [Figure 7] FIG. 7 is a view taken along the line VII-VII in FIG. 4. [Figure 8] FIG. 8 is a view of another aspect that replaces FIG. 7. [Figure 9] FIG. 10 is an exploded perspective view of a fixing holder according to a second embodiment. [Figure 10] FIG. 5 is a cross-sectional view corresponding to FIG. 4 of the first embodiment. [Figure 11] FIG. 11 is a view taken along the line XI-XI in FIG. [Figure 12] This is a plan view of Figure 11 with the addition of an overall plan view of the grating. [Figure 13] FIG. 1 is an explanatory cross-sectional view of a conventional technique. DETAILED DESCRIPTION OF THE INVENTION

[0009] The grating fixing device according to the present invention will be described in detail below. Figures 1 to 12 show one form of a grating fixing device (hereinafter simply referred to as "fixing device"). Figure 1 is a plan view of a grating with a base member attached and fixed to it in embodiment 1, Figure 2 is a side view of the grating with the base member of Figure 1 placed on a gutter, Figure 3 is a cross-sectional view of the bolts loosely inserted into the through-holes and through-holes of Figure 1 beginning to thread into the nuts, Figure 4 is a cross-sectional view of the second plate pressing against the gutter side wall, Figure 5 is a cross-sectional view of another embodiment that replaces Figure 4, Figure 6 is a perspective view of the pressing member with a nut, Figure 7 is a view taken along line VII-VII in Figure 4, Figure 8 is a view of another embodiment that replaces Figure 7, Figure 9 is an exploded perspective view of a fixing device according to embodiment 2, Figure 10 is a cross-sectional view corresponding to Figure 4 of embodiment 1, Figure 11 is a view taken along line XI-XI in Figure 10, and Figure 12 is a plan view of Figure 11. For ease of understanding, each drawing is simplified and the essential parts of the invention are emphasized, while parts not directly related to the present invention are omitted.

[0010] (1) Embodiment 1 The grating fixing holder G comprises a base member 2, a pressing member 3 with a nut, and a bolt 6 (FIGS. 1 to 8). The base member 2 is a metal plate-like body that has through-holes 20 formed in its flat plate portion 21 and is attached and fixed to a pair of adjacent main members 11 of the grating 1 (Figs. 1 and 7). The base member 2 is made by drilling through-holes 20 slightly larger than the axial diameter of the bolt 6 approximately in the center of the flat plate portion 21, which has been cut into a rectangular piece from a steel plate or the like. The pair of adjacent main members 11, which are raised in the width direction, face each other at their opposing band width surfaces 111, with the lower surface 21b of the flat plate portion 21 of the base member 2 horizontally positioned above the lower edge 11b of the main member, and the base member 2 is attached and fixed to the main member 11 by welding. The symbol wd indicates the welded portion. The flat plate portion 21 of the base member 2 is arranged horizontally at a position above the lower edge 11b of the main member of the grating 1, and the first plate portion 41 associated with the pressing member 4 of the nut-equipped pressing member 3 is inserted from below between the pair of main members 11 (Figure 7), so that when the bolt 6 is tightened, the first plate portion 41 comes into contact with the band-width surface 111, which is the side surface of the main member 11, preventing it from rotating together. Here, the upper side of the "upper position" as referred to in the present invention, or the lower side of the "lower side 21b of the flat portion 21 relating to the base member 2", refers to the surface of the lower side of the flat portion 21 that is literally above the plane of the paper, or that is on the plane of the paper, in the case of Figure 4 where the base member 2 is attached and fixed to the main member 11.

[0011] The grating 1 of this embodiment is a metal grating 1 in which vertical portions 121 of inverted L-shaped members 12a in side view associated with side support members 12 are fixed to both sides of multiple main members 11 arranged parallel to one another, so that the horizontal portions 122 of the inverted L-shaped members 12a protrude outward (Figs. 1 and 2). This is a flanged grating 1 in which vertical portions 121 are fixed to both sides of a cover main section, which is made up of multiple strip-shaped main members 11 arranged at a predetermined pitch with their widths raised, so that the horizontal portions 122 protrude outward like a flange. The grating 1 is rectangular and includes main members 11, end plates 13, crossbars 14, and side support members 12. The main members 11, which are made of numerous strips or I-bars, and the crossbars 14 perpendicular to them form a grid with slits S for allowing rainwater on the road surface to flow down, and both sides of the grid are blocked by side support members 12 of L-shaped members 12a. End plates 13 are placed on both ends of the main members 11 arranged side by side. Here, long, narrow strip crossbars 14 are laid horizontally and passed through oval holes 110 drilled in the main members 11, and then the crossbars 14 are raised and the concave notches on the upper edges of the crossbars 14 are fitted into the main members 11 to form a lattice shape.

[0012] The nut-attached pressing member 3 is a metal member in which a pressing member 4 and a nut 5 are fixed and integrated (FIGS. 3 and 6). The pressing member 4 is a horizontally elongated rectangular plate-like piece disposed on the underside 21b of the flat plate portion 21. The second plate portion 42 extends from the tip of the first plate portion 41, which has a through-hole 410, toward the underside 41b at an obtuse interior angle θ (FIG. 6) as viewed from the front in FIG. 3. The front view shape of the pressing member 4 in this invention is the shape of the pressing member viewed from the bottom left of the paper in FIG. 6, and is the same as the outer shape of the pressing member in FIG. 3. The angle θ is preferably in the range of 105° to 165°, and more preferably in the range of 120° to 150°. This is because the pressing member 4 can fully exert its pressing force against the gutter side wall 81 and can be made simple and compact. The through-hole 410, which is larger than the shaft diameter of the bolt 6, is provided approximately in the longitudinal center of the flat first plate portion 41. The pressing member 4 is provided with a flat-plate-shaped tip portion 422 that is bent and extends from a flat-plate-shaped main portion 421 of the second plate portion 42 connected to the first plate portion 41 toward the back surface 41b side as seen from the front in Fig. 4. Here, the back surface 41b side of "bent from the tip side of the first plate portion 41 toward the back surface 41b side at an obtuse interior angle θ as seen from the front" refers to the lower surface side of the first plate portion 41 in Figs. 4 and 5 where the nut-attached pressing member 3 is attached to the base member 2 with the bolt 6, and the surface 41a side of the first plate portion 41 refers to the upper surface side of the first plate portion 41.

[0013] In this embodiment, as shown in Fig. 3, the tip portion 422 of the second plate portion 42 bends from the flat main portion 421 toward the back surface 41b at an interior angle (about 140° in this case) that is approximately the same as the interior angle θ of the bending from the tip side of the first plate portion 41 to the second plate portion 42. Excluding the through-hole 410, the pressing member 4 (Fig. 6) is formed by the first plate portion 41 and the tip portion 422 extending from both ends of the rather long flat main portion 421 in a substantially line-symmetrical manner as shown in Fig. 3. The nut 5 is a general-purpose mechanical part that screws onto the bolt 6. The nut 5 is fixed integrally to the first plate portion 41 of the pressing member 4 by welding, with the center of the opening of the through hole 410 and the center of the opening of the female screw hole aligned on the back surface 41b of the first plate portion 41.

[0014] The bolt 6 is a general-purpose mechanical part in which a male thread that screws into the nut 5 is formed on the bolt shaft 62. The bolt head 61 of the bolt 6 is disposed on the upper surface 21a of the flat plate portion 21, and the bolt shaft 62 is loosely inserted into the through-hole 20 and the through-hole 410 and screwed into the nut 5 (Fig. 3). When the bolt 6 is tightened, the pressing member 4 presses the gutter side wall 81 against the gutter 8 that is covered by the grating 1, thereby fixing and holding the grating 1 to the gutter 8 (Fig. 4). When the bolt 6 and the nut 5 are tightened, the pressing member 4 rotates clockwise as shown in Fig. 4, but the rotation is restricted by the presence of the side wall 81, and as a result, the pressing member 4 presses the side wall 81 in a bracing manner.

[0015] Specifically, the base member 2, the pressing member with nut 3, and the bolt 6 are provided for a gutter 8 covered with a grating 1, and the flat plate portion 21 is attached and fixed to the grating 1. From above, the bolt 6 is loosely inserted into the through-hole 20 and then into the through-hole 410 of the first plate portion 41 located on the underside 21b of the flat plate portion 21, and then screwed into the nut 5 located further below. During the process of tightening the bolt 6 and the nut 5, the first plate portion 41 of the pressing member with nut 3 approaches or abuts against the underside 21b of the flat plate portion 21 from below the grating 1, and the first plate portion 41 enters between the pair of main members 11 (Figure 3). When the bolt is tightened, the first plate portion 41 is restricted by the strip surface 111 of the main member 11, preventing the pressing member with nut 3 from rotating together (Figure 4). Then, by tightening the bolt 6 and the nut 5, the surface side base end 41a1 of the first plate portion 41 comes into contact with the underside 21b of the flat plate portion 21, and the second plate portion 42 moves upward and rotates as shown by the black arrow in Figure 4 so as to protrude sideways, using this contact point F as a fulcrum, thereby forming a grating fixing holder G that presses against the side wall 81 of the gutter 8. 4, where the second plate portion 42 presses against the side wall 81, the length of the flat main portion 421, the angle θ, and the like are determined so that the pressing member 4 does not come into contact with the side backing material 12. It is preferable to maintain a gap ε between the underside of the flat portion 21 and the front-side tip of the first plate portion 41 to accommodate further tightening of the bolt 6 and the nut 5 (described in detail later). In the figure, the symbol α indicates the inclination of the bolt 6, and as long as the bolt 6 is even slightly inclined, the gap ε will be present. Therefore, even if the gap ε is hidden and not visible, the worker tightening the bolt 6 can easily confirm the existence of the gap ε.

[0016] From the state shown in Figure 3 in which the bolt 6 is threaded into the nut 5 and the tip portion 422 of the pressing member 4 hangs down, when the bolt 6 and the nut 5 are tightened, the tip portion 422 rises and presses against the gutter side wall 81 as shown in Figure 4. The reaction force of this pressure moves the grating 1 so as to eliminate the gap δ that existed between the grating 1 and the side wall 81 in Figure 3, and the grating 1 after movement as shown in Figure 4 is fixed and held in place. The pressing force P at the tip of the pressing member 4 (tip portion 422) that abuts against the gutter side wall 81 rotates diagonally upward to the left in the figure, as indicated by the black arrow in Figure 4, with abutment portion F as a fulcrum. The tip portion 422 of the pressing member 4 presses one side wall 81a with the horizontal component of the pressing force P, and this reaction force presses the other side wall 81b, fixing and holding the grating 1. Furthermore, not only does the fixing holder G push against the horizontal direction to fix and hold the grating 1, but the upward component of the pressing force P, indicated by the black arrow in Figure 4, acts as a reaction force that pulls the grating 1 downward, making it a desirable fixing holder G that helps prevent the grating 1 from bouncing up. Furthermore, tightening the bolts 6 and nuts 5 narrows the gap ε between the flat plate portion 21 and the first plate portion 41 on the second plate portion 42 side, thereby strengthening the elastic deformation of the pressing member 4. The elastic restoring force that accompanies this elastic deformation results in the fixing holder G being able to more firmly fix and maintain the grating 1 that covers the gutter 8 in the gutter 8.

[0017] Figure 5 shows another type of fixing holder G in which the shape of the pressing member 4 is changed from that of Figure 4 of this embodiment, and the tip portion 422 is pressed against the gutter side wall 81 over almost the entire surface 42a side by tightening the bolt 6 and the nut 5. 8 shows another embodiment of a fixing fixture G in which flat plate portions 21 are attached and fixed by welding to both lower end faces 112 of a pair of adjacent main members 11, instead of the embodiment shown in FIG. 7 in which the lower surfaces 21b of the flat plate portions are disposed above the lower edges 11b of the main members. If the height of the main members 11 in the strip width direction is less than 17 mm, there is a risk that the bolt heads 61 will protrude from the top surface of the grating 1, but by attaching the flat plate portions 21 to the lower end faces 112 of the main members 11, protrusion of the bolts 6 can be prevented. In FIG. 8, reference numeral 24 denotes a protruding piece that bends downward from the horizontally disposed flat plate portion 21 and prevents the nut-equipped pressing member 3 from rotating together when the bolt 6 is tightened. Although this embodiment is applied to a grating 1 that is placed on a U-shaped gutter, it can also be applied to a grating 1 of the drop-in type shown in Figure 13 by preparing two sets of this fixing holder G. In the figure, symbol 7 indicates a washer, symbol k indicates a bending line, and symbol R indicates a gutter flow path.

[0018] (2) Embodiment 2 This embodiment is a metal fixing fixture G that can be retrofitted to an existing grating 1. As with embodiment 1, the fixing fixture G comprises a base member 2, a pressing member 3 with a nut, and a bolt 6 (Figs. 9 to 12). The grating 1 uses twist bars as crossbars 14. The twist bars are electrically pressure-welded onto main members 11 arranged in parallel to form a grid pattern. The base member 2 is divided into a first base member 2A and a second base member 2B, and through holes 20 are formed in the flat plate portions 21 of the first base member 2A and the second base member 2B. A pair of adjacent main members 11 are sandwiched from above and below by the upper first base member 2A and the lower second base member 2B, and by tightening bolts 6, the first base member 2A and the second base member 2B become the base member 2 that is detachably attached and fixed to the main members 11. The longitudinal length of the second base member 2B is made slightly shorter than the groove width of the side gutter 8 as shown in Figure 10, and through holes 20 are formed near both ends in the longitudinal direction. The first base member 2A, a pressing member 3 with a nut, and a pair of bolts 6 form a fixed retainer G (Figure 9). 9 is an exploded perspective view of the fixing holder G, and the first base member 2A is drawn for easy understanding. When in use, the first base member 2A is turned around so that the hook 27 faces the rising portion 28 of the second base member 2B as shown in FIG. 11, and is used in such a way that it is hooked onto the main member 11.

[0019] The first base member 2A here is a hanging member in which hooks 27 provided at the upper end portions of upright plate portions 26 extending upward in a U-shape from both sides of its flat plate portion 21 are hung and hung on the main member 11 so that the flat plate portion 21 is disposed horizontally slightly above the lower end 11b of the main member in Fig. 10. A through hole 20 is formed approximately at the center of the flat plate portion 21. The second base member 2B is a processed plate member formed by integrally overlapping flat plate surfaces of two types of plate pieces, as shown in Figure 11. The pair of main members 11 are sandwiched between rising portions 28 that are bent upward and extend from both sides of the flat plate portion 21, which is a composite of two overlapping plate pieces. Furthermore, protruding portions 24 that are bent downward and extend from both sides of the flat plate portion 21 prevent the nut-attached pressing member 3 from rotating together when the bolt 6 and nut 5 are tightened. As shown in the figure, the second base member 2B is a horizontally elongated member that is slightly shorter than the width of the gutter 8, and the first base member 2A is a small part that is approximately 1 / 4 or less in length compared to the horizontal length of the second base member 2B (Figs. 9 to 12). This is because it is sufficient for the second base member 2B to be able to align its through holes 20 with the through holes 20 disposed near both ends of the gutter in the first base member 2A, and to sandwich and hold the main member 11 between the second base member 2B and the first base member 2A. The nut-equipped pressing member 3 and the bolt 6 are the same as those in the first embodiment, and their explanation will be omitted. The same reference numerals as those in the first embodiment indicate the same or corresponding parts.

[0020] To attach this fixing fixture G to the existing grating 1, first, the second base member 2B is placed in the direction of the groove width of the gutter 8, and a pair of adjacent main members 11 are sandwiched between the first base member 2A and the first base member 2A from above and below at the locations near one end and the other end where the through holes 20 are provided (Figure 11). At this time, the through holes 20 in the first base member 2A are aligned with the through holes 20 in the second base member 2B. Then, the bolt 6 is loosely inserted from above into the through holes 20 in the first base member 2A, the through holes 20 in the second base member 2B, and further into the through holes 410, and the bolt shaft 62 is screwed into the nut 5 of the nut-equipped pressing member 3.

[0021] Next, the tip portions 422 of the pair of nut-attached pressing members 3 are set close to the respective side walls 81 of the groove, and then the bolts 6 threaded onto the nuts 5 are tightened. Thereafter, by tightening the bolts 6, the surface-side base ends 41a1 of the first plate portions 41 come into contact with the underside 21b of the flat plate portion 21 of the second base member 2B. When the bolts 6 are tightened further, the second plate portions 42 move upward and rotate so as to protrude laterally, with the contact portions F between the surface-side base ends 41a1 and the flat plate portion 21 as fulcrums, and press against both side walls 81 of the gutter 8 as shown in FIG.

[0022] 10 , the reaction force of the tip portion 422 of the left pressing member 4 pressing one side wall 81 a is transmitted from the bolt 6 on its left side to the abutment portion E of the second base member 2B around the through hole 20, pressing the second base member 2B to the right. Similarly, the reaction force of the tip portion 422 of the right pressing member 4 pressing the other side wall 81 b is transmitted from the bolt 6 on the right side to the abutment portion E of the second base member 2B around the through hole 20, pressing the second base member 2B to the left. Thus, the base member 2 and the pair of nut-equipped pressing members 3 are integrated, and the pressing forces from the tip portions 422 of the left pressing member 4 and the right pressing member 4 fix and hold the grating 1 in the gutter 8. The pressing force of tip portion 422 of left pressing member 4 is the same as that explained for the black arrow in Figure 4 in embodiment 1, and the horizontal component of pressing force P fixes and holds grating 1 in the gutter 8, and furthermore the upward component of pressing force P helps to prevent grating 1 from bouncing up. The pressing force of tip portion 422 of right pressing member 4 also contributes to fixing and holding grating 1 in the gutter 8, simply by changing the direction of pressing member 4 to the other side wall 81b in the opposite direction to that of the left pressing member 4. In addition, tightening the bolts 6 also serves to clamp the first base member 2A and the second base member 2B from above and below to attach and fix the pair of main members 11. As in the first embodiment, the base member 2, the nut-equipped pressing member 3, and the bolts 6 alone constitute a desired grating fixing holder G that can be retrofitted and fixed to an existing grating 1.

[0023] (3) Effects The grating fixing holder G configured in this manner has a small number of parts, which allows for cost reduction. The leg pieces 6a, 6b of Patent Document 2 and the lifting member 12 of Patent Document 1 (corresponding to the pressing member 4 of the present invention) not only require bolts and nuts to lift the leg pieces 6a, 6b or the lifting member 12, but also require a separate shaft member to pivotally support one end of the leg pieces 6a, 6b or the lifting member 12. In Patent Document 1, in addition to the tightening bolt 13a, bolt 14a inserted into bearing holes 11c and 12b is essential, which not only increases the number of parts but also complicates their processing.

[0024] On the other hand, the fixing fixture G of the present invention is configured so that when the bolt 6 and nut 5 are tightened, the surface side base end 41a1 of the first plate portion 41 comes into contact with the underside 21b of the flat plate portion 21, and the second plate portion 42 moves upward and rotates to protrude laterally with this contact portion F as a fulcrum, thereby pressing against the gutter side wall 81. This makes it possible to omit the leg pieces 6a, 6b of Patent Document 2 and the shaft member that is rotatably supported at one end of the lifting member 12 of Patent Document 1. This fixing fixture G has only three parts: a base member 2, a pressure member 3 with a nut, and a bolt 6, and its structure is simpler than those of Patent Documents 1 and 2, allowing for lower costs. Each component can be made compact, so it is not bulky to carry around. Inventory management is also easy. Of course, there is no need to modify the gutter 8. This is a groundbreaking invention that has never been seen before.

[0025] The lifting member of Patent Document 1, which corresponds to pressing member 4, must be provided with bearing holes 12b through which bolts 14a are inserted, making the shape complex. However, the pressing member 4 of the present invention, which corresponds to this lifting member, can be formed by simply bending a plate-like piece such as a flat plate and providing through holes 410. 7, if the lower surface 21b of the flat plate portion of the base member 2 is horizontally disposed above the lower edge 11b of the main member, the first plate portion 41 can enter between the pair of main members 11 so as to approach or abut against the lower surface 21b of the flat plate portion 21 from below the grating 1 when the bolts 6 are tightened, thereby preventing the nut-equipped pressing member 3 from rotating together with the grating 1. The rotation stoppers 15a and 15b for preventing co-rotation shown in Patent Document 1 are also unnecessary.

[0026] Additionally, the work of attaching this fixing holder G to the grating 1 that has covered the side ditch 8 is also simplified. All that is required is to align the through-hole 410 of the nut-equipped pressing member 3 from below with the through-hole 20 of the base member 2 that has been previously attached and fixed to the grating 1 by welding, insert the bolt 6 from above the base member 2 through the through-hole 20 and through-hole 410, screw it into the nut 5, and then tighten it. The grating 1 can be easily fixed and held in the side ditch 8. By tightening the bolt 6 and nut 5, the second plate portion 42 moves upward and rotates so as to protrude laterally, with the contact portion F as the fulcrum, pressing against the gutter side wall 81 and easily fixing and holding the grating 1 to the gutter 8, but this does not stop there. When the bolt 6 is tightly tightened, the gap ε between the flat plate portion 21 and the first plate portion 41 on the side of the second plate portion 42 narrows, strengthening the elastic deformation of the pressing member 4, and the elastic restoring force accompanying this elastic deformation makes it possible to more firmly fix and hold the grating 1, which covers the gutter 8, to the gutter 8, making this an excellent invention.

[0027] Furthermore, when a tip portion 422 is provided that bends downward and extends from the flat main portion 421 of the second plate portion 42 connected to the first plate portion 41 when viewed from the front, the entire surface 42a of the tip portion 422 can be pressed as shown in Figure 5, thereby increasing the contact area with the gutter side wall 81 and enabling the grating 1 to be fixed more firmly to the gutter 8.

[0028] Furthermore, the base member 2 is divided into a first base member 2A and a second base member 2B, and through holes 20 are formed in the flat plate portions 21 of the first base member 2A and the second base member 2B, so that a pair of adjacent main members 11 are sandwiched between the first base member 2A and the second base member 2B from above and below, and the first base member 2A and the second base member 2B are detachably attached and fixed to the main members 11 by tightening the bolts 6, allowing them to be retrofitted to an existing grating 1. Moreover, the attachment and fixation of the first base member 2A and the second base member 2B to the main members 11 is carried out by the bolts 6 used to securely maintain the grating 1 in the gutter 8, so no attachment and fixation members for the base member 2 to the main members 11 are required. This is not limited to cases where the base member 2 is pre-attached and fixed to the grating 1 by welding, but can also be attached to an existing grating 1 to maintain the fixation of the grating 1 that covers the gutter 8, thereby expanding the range of applications.

[0029] Furthermore, as shown in Figure 10, the main member 11 is sandwiched from above and below by the first base member 2A at each of the locations near one end and the other end where the through holes 20 of the second base member 2B arranged in the groove width direction of the gutter 8 are provided, and by tightening the bolts 6, each of the two second plate portions 42 rotates with the contact portion F as a fulcrum, thereby pressing against both side walls 81 of the gutter 8. Therefore, this is not limited to the grating 1 that is placed on the U-shaped gutter 8 shown in the same figure, but can also be applied to drop-in type gratings, etc. As described above, the fixing holder G of the present invention exhibits the above-mentioned many excellent effects and is extremely useful.

[0030] The present invention is not limited to 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, etc. of the grating 1, base member 2, nut-equipped pressing member 3, bolt 6, etc. can be selected appropriately depending on the application. [Explanation of symbols]

[0031] 1. Grating 11 Main member 111 Obi width surface (side) 112 Lower end face 2 Base material 2A First base member 2B Second base member 20 Through hole 21 Flat plate part 3 Pressing member with nut 3 4 Pressing member 41 First plate part 41a Surface proximal end 410 Through hole 42 Second plate part 5 Nuts 6 volts G Grating fixing holder F Contact area (contact area between the base end on the surface side and the underside of the flat plate)

Claims

1. a base member having a through hole formed in a flat plate portion and attached and fixed to a pair of adjacent main members of the grating; a pressing member having a plate-like piece disposed on the underside of the flat plate portion, the pressing member including a first plate portion having a through hole and a second plate portion extending from the tip side of the first plate portion having a through hole and bent toward the back surface side at an obtuse interior angle in a front view, and a nut-attached pressing member having a nut fixed integrally to the back surface of the first plate portion, the center of the opening of the through hole and the opening of the female screw hole being aligned; a bolt having a bolt head disposed on the upper surface side of the flat plate portion, a bolt shaft loosely inserted into the through hole and the through hole, and screwed into the nut; A grating fixing holder characterized in that, when the bolt and nut loosely inserted into the through-hole and the through-hole are tightened together, the base end of the front surface of the first plate portion comes into contact with the underside of the flat plate portion, and the second plate portion moves upward and rotates so as to protrude laterally with this contact point as a fulcrum, pressing against the side wall of the gutter.

2. The grating fixing holder according to claim 1, wherein the nut-equipped pressing member has a tip portion that extends downward in a front view from the flat main portion of the second plate portion that is connected to the first plate portion.

3. 3. A grating fixing holder as described in claim 2, wherein the lower surface of the flat plate portion of the base member is horizontally disposed above the lower edge of the opposing band width surface of a pair of adjacent main members that are raised in the band width direction, the base member is attached and fixed to the main members by welding, and the first plate portion of the nut-equipped pressing member enters between the pair of main members so as to approach or abut against the underside of the flat plate portion from below the grating, and the band width surface of the main member prevents the nut-equipped pressing member from rotating together with the pair of main members when the bolts are tightened.

4. A grating fixing holder as described in claim 2, wherein the base member is divided into a first base member and a second base member, and the through holes are formed in the flat plate portions of the first base member and the second base member, and a pair of adjacent main members are sandwiched between the first base member and the second base member from above and below, and by tightening the bolts, the first base member and the second base member associated with the base member are detachably attached and fixed to the main members.

5. The longitudinal length of the second base member is made smaller than the groove width of the side groove, and the through holes are formed near both ends in the longitudinal direction of the second base member, and the first base member, the nut-equipped pressing member, and a pair of the bolts are provided, A grating fixing holder as described in claim 4, wherein a pair of adjacent main members are sandwiched from above and below by the upper first base member and the lower second base member at respective locations near one end and the other end where the through holes are provided of the second base member arranged in the groove width direction of the gutter, and when the bolts are tightened, the front side base end of the first plate portion abuts against the underside of the flat plate portion of the second base member, and each of the second plate portions moves upward and rotates so as to protrude laterally with this abutting portion as a fulcrum, pressing against both side walls of the gutter.

6. A grating fixing holder as described in claim 2 or 5, wherein the flat plate portions are attached and fixed horizontally to both lower end faces of a pair of adjacent main members that are raised in the width direction, and a protruding piece portion is further provided that protrudes downward from one side edge of the flat plate portions, and the protruding piece portion prevents the nut-equipped pressing member from rotating together with the bolt when the bolt is tightened.

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