JPH0223667Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an improvement of a cover plate used to improve the walkability of a grating (water collection basin).

[Conventional technology]

Generally, as shown in Fig. 1, a grating consists of a large number of parallel width members (hereinafter referred to as main bars) 1..., longitudinal members connecting these members (hereinafter referred to as cross bars) 2..., and the above-mentioned main bars 1.
It has a structure consisting of side bars 3, 3 that connect both ends of the .

Such gratings are currently used everywhere for collection and drainage of ditches that handle a relatively large amount of water.

However, when a pedestrian passes over the grating, there is a risk that the heel of the grating may get caught in the eye of the grating, especially if the pedestrian is wearing high heels.

A cover plate is intended to eliminate this danger by being attached to the top surface of the grating to cover the grid openings near the center.

[Problem that the invention attempts to solve]

However, in the past, this cover plate was simply a single plate, which was simply welded to the top surface of the grating. This creates a step with a thickness of 100 cm, which poses a risk of tripping, and does not necessarily improve walking performance.

In addition, since welding work is required to install the grating, it is assumed that this type of grating must be pre-installed in the factory before being shipped.For example, it may be installed on an existing grating or removed once it has been installed. It is practically impossible to do so, and in that sense it is extremely inconvenient to use.

The object of the present invention is to provide a cover plate that can not only be easily attached to and removed from a grating, but also ensure a comfortable walking surface with no steps.

[Means for solving problems]

The cover plate of the present invention is shown in Figures 1 and 2.
As shown in Figures A and B, it has a width W smaller than the width W ₂ of the target grating G, and both ends X ₁ and X ₁ in the width direction are bent downward at an obtuse angle. Parallel main bar 1 of grating G...
As shown in FIGS. 3 and 4, connecting plates 5 are attached to the rear surface of the central face plate portion _X0 other than the serrated portions 40 near at least four corners. , is characterized in that the connecting plate 5 and the lower end of the main bar 1 of the grating G are tightened and attached using a fastener M.

[Effect]

In the cover plate having the above structure, both ends X ₁ and X ₁ in the width direction are formed in a sawtooth shape, and the grating G
When the serrated portion 40 is attached to the parallel main bar 1, the serrated portion 40 cuts diagonally between the parallel main bars 1, and as a result, the upper surface of the cover plate _S0 and the upper surface of the grating
It is possible to ensure a comfortable walking surface without creating an extreme step between the ground and _G0 .

In addition, since the attachment structure to the grating G is a removable type that is fastened and attached using a fastener M,
Easy to install and remove from existing gratings.
Very easy to use.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a perspective view showing an attached state of a cover plate according to an embodiment of the present invention, FIG. 2A is a plan view of the same cover plate, and FIG.

To explain the example in the figure in detail, the cover plate main body 4 is basically rectangular in plan view, and its width W ₁ is the same as the grating G to be targeted.
It is set to be appropriately smaller than the width W ₂ of the grating, that is, to leave open the grid portions necessary for collecting and draining water on both the left and right sides when installed on the grating. The length L ₁ may be slightly smaller than the length L ₂ of the target grating G. Although not shown in the drawings, the cover plate main body 4 is preferably made of a so-called striped steel plate that is embossed in the shape of a boat bottom or the like, in order to prevent pedestrians from slipping.

Next, in the width direction of the cover plate main body (direction corresponding to the width direction of grating G), both ends X ₁ , X ₁
is intermittently cut out over its entire length to form a sawtooth shape (the sawtooth portion is indicated by reference numeral 40).
The pitch of the serrations of this serrated portion 40, that is, the pitch _P1 of the notch 40' matches the pitch _P2 of the main bar 1 of the target grating G, and the width (maximum width) B of each sawtooth corresponds to the pitch P2 of the main bar 1 of the target grating G. The width C of the gap 7 between adjacent main bars 1, 1 is set smaller than the width C of the gap 7 between the adjacent main bars 1, 1. The length l of each sawtooth depends on the plate thickness and the condition of the bending angle α described later.In the installed state, the top edge ₄₀₀ of the tip of the sawtooth is below the grating upper surface _G0 level, and the side edge is below the level of the grating upper surface G0. It is set so that there is no difference in level from the top surface.

The serrated portion 40 at the side end extends from approximately the base to the lower side (back surface 4') as shown in FIG.
(side) is bent at an obtuse angle. If the bending angle α is too large, a step will tend to occur during installation, which is not preferable. generally
Approximately 15 to 20 degrees is appropriate.

Further, this cover plate main body 4 is provided with a mounting plate 5 with a through hole 5' for attachment to the grating G on the back side near the four corners of the central face plate portion _X0 other than the serrated portion 40. . This connecting plate 5 has a groove-shaped cross section with both ends raised up, and forms an embedded seat on the top surface of the cover plate so that the head of a bolt of a fastener _M , which will be described later, does not come out from the top surface S0 of the cover plate. It's becoming like that. Note that a through hole 41 having a shape and size depending on the type of fastener M is bored in the cover plate main body 4 at a position corresponding to the above-mentioned joining plate 5.

It is convenient to use bolts and nuts as the fastener M for fastening the above-mentioned connecting plate 5, and two examples thereof are shown in Figs. A longitudinal side view, C is a plan view, and FIG. 4 D is a bottom view). To explain each example, the one in Fig. 3 has a set of bolts and nuts 60,
61 and a locking bar 62 having a bolt insertion hole 62', a bolt 60 is inserted from the top side of the cover plate through the through hole 5' of the connecting plate 5, and the tip of the bolt facing the back side of the grating G is By setting the locking bar 62, screwing the nut 61, and tightening it, the locking bar 62 is engaged and fixed to the lower end of the main bar 1 of the grating G, thereby performing installation. In this case, the through hole 41 of the cover plate main body 4 is connected to the bolt head 6.
0' is set to a size that does not rotate.

As is clear from the above, this type is a bottom-mounting type in which tightening is performed on the back side of the grating G.

Regarding the example shown in FIG. 4, this first includes a bolt 70, an outer sheath 71 that loosely fits onto the shaft of the bolt, and a nut hole 7 fitted in the outer sheath 71.
It consists of a locking bar 72 with 2'.

The outer sheath 71 has the shape of a circular tube as a whole, with parts 71a, 71a facing each other in one direction left and the other parts cut out, and an axial groove (vertical groove) 71b is formed on the inner surface of the facing part. , 71b are carved, and a flange 71c having a bolt insertion hole 71c' is provided at the upper end.

The locking bar 72 has protrusions 72 on both sides in the longitudinal direction.
a, 72a, which are engaged with the longitudinal grooves 71b, 71b of the outer sheath 71, so that they are movable along the longitudinal grooves and rotatable about the protrusions 72a, 72a. These protrusions 72a, 7
2a is provided at a position shifted toward one end from the longitudinal center position of the bar body, and the end of the bar body on the side where the protrusion is shifted is obliquely cut off to form an inclined guide surface 72b. That is, the locking bar 7
2 engages with the lower end of the longitudinal groove 71b of the outer sheath in a free state and maintains an upright position (shown by chain lines) with the inclined guide surface 72b facing upward. Note that the nut hole 72'
is provided at a position in the longitudinal direction corresponding to the projection 72a.

When installing, the outer sheath 7 with the locking bar 72 is attached to the coupling plate 5 from the top side of the cover plate S.
Set to 1. At this time, the locking bar 72 passes through the through hole 5' of the coupling plate 5 in a state in which it stands upright and is housed in the sheath as shown by the chain line.

Once the outer sheath is set, the bolt 70 is similarly inserted from the upper surface side of the cover plate through the through hole 71c' of the flange of the outer sheath. When the tip of the inserted bolt hits the locking bar 72 in the upright state, the bolt is further pushed down, and the locking bar 72 is rotated by pushing the inclined guide surface 72b at its upper end to shift to the horizontal state. let When the locking bar is in a horizontal state, the inserted bolt 70 is rotated. As a result, the bolt 70 is screwed into the nut hole 72' of the locking bar 72 located at the lower end of the groove, and when the bolt head 70a is lowered until it touches the flange 71c of the outer sheath, the locking bar is next screwed into the nut hole 72'. 72 moves upward, and is eventually engaged and fixed to the lower end of the main bar 1 of the grating G, as described above. In this case, the through hole 41 of the cover plate main body 4 needs to be made quite large so that the bolt fastener can enter therein.

In addition, in the case of removal, if the bolt 70 is loosened and pulled out, the locking bar 72 will naturally return to the upright state due to its own weight, so the outer sheath 71 can be removed as is.

That is, this type is a top-mounting type that can be attached only from the top side of the cover plate, and is particularly convenient for attaching to an existing grating.

The cover plate S configured as above is
When attached to the grating G, the serrated portions 40 at both ends enter in an inclined manner between each main bar 1 of the grating, creating a walking surface that connects the grating top surface G ₀ to the cover plate top surface S ₀ without any steps, and the grating can provide good walkability.

In addition, this cover plate has a central face plate X ₀
It can be attached by fastening using fasteners M using bolts and nuts, for example, using the connecting plates 5 at the four corners, and is extremely easy to install and remove, and is very convenient to use.

[Effect of idea]

As explained above, the cover plate of the present invention can be attached to a grating to ensure a step-free walking surface that is easy to walk on, and has a structure that is easy to attach and detach, making it extremely easy to use and handle.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the attached state of the cover plate of the present invention, and FIG. 2 is an example of the cover plate of the present invention, in which A is a plan view and B is a longitudinal cross-sectional side view taken along the line A-A in FIG. 3 and 4 respectively show specific examples of the mounting structure of the cover plate of the present invention, in which A is a longitudinal front view, B is a longitudinal side view, C is a plan view, and FIG.
Figure D is a bottom view. In the figure, 1: main bar, 2: crossbar, 3:
Side bar, 4: cover plate main body, 40: serrated portion, 5: joining plate, G: grating, S: cover plate, M: fastener.

Claims (1)

[Scope of utility model registration request] _A parallel width direction member 1 having a width W ₁ smaller than the width W ₂ of the target grating G, with both width direction ends X ₁ , ...Central face plate portion other than the sawtooth portion 40, which is formed in a sawtooth shape to fit between the
A connecting plate 5 is attached to the rear side near at least the four corners of X ₀ , and the connecting plate 5 and the lower end of the widthwise member 1 of the grating G are tightened together using a fastener M. Features a removable cover plate for gratings.