JP3203044U - Grating and receiving frame fixing mechanism, and groove structure provided therewith - Google Patents

Abstract

Provided is a grating and receiving frame fixing mechanism that does not require a gap cap, reduces cost, and can easily and reliably fix the grating and receiving frame. The fixing mechanism of the grating 1 and the receiving frame 2 includes a fixing plate 14 provided with a bolt hole 14a that is fixed in the vicinity of the surface of the grating and is provided with a counterbore at a notch portion of the grating, and an upper portion of the receiving frame. A bolt fixing mechanism 23 having a bolt opening in the upper portion thereof, and a bolt 3 for screwing the fixing plate 14 and the bolt fixing mechanism 23 together. The bolt fixing mechanism 23 includes the bolt 3 The nut is characterized by having a gap that is restricted in rotation in the bolt fixing mechanism 23 and that can move in the horizontal direction. [Selection] Figure 5

Description

  The present invention relates to a grating and a receiving frame fixing mechanism used for a side groove or the like. Moreover, it is related with the groove structure provided with it.

  Metal gratings are widely used as groove covers for side grooves of roads and sidewalks. In many of this type of grating, both ends of a plurality of bearing bars (also called main bars) provided at regular intervals are fixed using two side bars, and a cross bar (connecting bar) is connected in parallel to the side bars. Also has a structure in which a plurality of bearing bars are joined by pressure welding or the like. For joining the bearing bar and the side bar, welding or fitting is used.

The grating is fixed by a receiving frame and a bolt. The most general mechanism as this fixing mechanism will be described.
First, at each corner of the grating, a notch is formed by cutting off the end in the width direction of the groove of the bearing bar. A mounting plate fixed to the lower ends of the bearing bars on both sides of the notched bearing bar is provided at the bottom of the notched portion, and a mounting hole for inserting a bolt is formed in the mounting plate.
On the other hand, the receiving frame has a receiving frame hole through which a bolt is inserted below the mounting hole of the mounting plate. The grating and the receiving frame are fixed by passing a bolt from below the receiving frame hole and tightening the bolt that protrudes above the mounting hole of the mounting plate of the grating with a cap nut.
After fixing, a gap cap is provided to block the grating notch.

Also, a fixing method different from the above has been proposed.
In this method, instead of passing the bolt from below the receiving frame hole, a cap nut is provided below the receiving frame hole, and screwed to the cap nut through the bolt from above the mounting hole of the mounting plate provided in the grating. Then, after fixing, a gap cap for closing the notched portion of the grating is provided (for example, Patent Document 1).

JP 2010-116703 A

In any of the above-described fixing methods, it is necessary to provide a gap cap for closing the notched portion of the grating, and there is a problem that the number of parts increases and the cost increases.
In addition, there is a problem that the gap cap is removed when the automobile passes over the grating. If the gap cap is removed, the aesthetics of the grating are impaired, and the heel of the pedestrian and the tip of the cane enter the notch of the grating, resulting in injury to the pedestrian. Furthermore, since the cap nut and bolt are exposed, the cap nut and the bolt may be damaged when the heavy vehicle passes. Further, when the tire passes by the side of the cap nut or bolt, there is a problem that rotational torque is generated in the cap nut or bolt and the screw is loosened.

  At the time of construction, there was a problem that the grating and the receiving frame could not be fixed firmly. If the bolt is too long, the tip of the bolt hits the cap nut and cannot be tightened any further. Therefore, it was necessary to adjust the tightness by inserting a washer, and the construction was troublesome. The cap nut is used in order to prevent the joint between the bolt and the nut from being deteriorated due to rusting or the like.

  In addition, in order to mitigate the vibration and noise of the grating generated when the automobile passes, it is necessary to provide an elastic packing between the grating and the receiving frame, which has been a factor in increasing costs.

  The present invention has been made to solve the above-mentioned various problems, and proposes a new grating and a receiving frame fixing mechanism.

  The fixing mechanism for the grating and the receiving frame according to claim 1 of the present invention includes a fixing plate provided with a bolt hole which is an opening having a counterbore fixed in the vicinity of the grating surface in the notched portion of the grating, and an upper portion of the receiving frame. A bolt fixing mechanism having a bolt opening at an upper portion thereof, and a bolt for screwing the fixing plate and the bolt fixing mechanism. The bolt fixing mechanism has a nut corresponding to the bolt. The nut is characterized in that the rotation is restricted in the bolt fixing mechanism and has a gap that can move in the horizontal direction.

  The fixing mechanism for the grating and receiving frame according to claim 2 of the present invention is characterized by further comprising a cap made of a flexible material having a bolt opening on the upper surface, covering the bolt fixing mechanism.

  The fixing mechanism of the grating and the receiving frame according to claim 3 of the present invention is characterized by a substantially rectangular parallelepiped shape having at least one side surface opened.

  The fixing mechanism of the grating and receiving frame according to claim 4 of the present invention is characterized in that the bolt fixing mechanism is formed by bending a metal plate into a C shape.

  The fixing mechanism for the grating and receiving frame according to claim 5 of the present invention is characterized in that the bolt fixing mechanism further includes a height adjusting portion for adjusting the height.

  A groove structure according to claim 6 of the present invention is characterized by having any of the above-described grating and a receiving frame fixing mechanism.

  Since the grating and receiving frame fixing mechanism according to the present invention is configured as described above, a gap cap is unnecessary, and the cost and the fixing frame can be fixed easily and reliably.

It is the (a) top view and (b) local side view of the grating which concerns on this invention. It is (a) top view of the receiving frame which concerns on this invention, (b) local side view, and (c) side view of the side surface orthogonal to (b). It is a side view for demonstrating the structure of the bolt fixing mechanism provided in the receiving frame which concerns on this invention. It is a side view for demonstrating the structure of the bolt fixing mechanism provided in the receiving frame which concerns on this invention. It is a side view for demonstrating the fixing method of the grating which concerns on this invention, and a receiving frame. It is a principal part enlarged side view for demonstrating the fixing method of the grating which concerns on this invention, and a receiving frame.

Embodiment.
Embodiments relating to a grating and a receiving frame fixing mechanism according to the present invention will be described below with reference to the drawings. The following embodiment is an example of the present invention, and the present invention is not particularly limited to this example. For example, the shape and specific dimensions shown in the present embodiment are good examples, and the present invention is not limited to these. Further, in the present embodiment, the configuration and the like will be described by taking fine grating as an example, but the concept of the invention described below can be similarly applied even to coarse grating.

<Grating structure>
The configuration of the grating 1 will be described with reference to FIG.
FIG. 1A is a top view of the grating 1 and FIG. 1B is a local side view including a notch.
The grating 1 is provided in parallel with a plurality of bearing bars 12 arranged in parallel at substantially constant intervals, two side bars 11 joined to both ends of the bearing bar 12, and the side bars 11. And a plurality of cross bars 13 joined together. The cross bar 13 is joined to the upper part of each bearing bar 12 by pressure contact. Regarding this joining, other methods may be used without being limited to the pressure welding. The size of the grating 1 is 1000 mm in length, 400 mm in width, and 55 mm in height.
In addition, in order to avoid complication of the figure, with respect to a plurality of portions, a lead line is drawn and attached to only one portion among them.

  In locations near the respective corners of the grating 1, the bearing bar 12 is provided with notches. And in each notch part, the fixing board 14 is being fixed to the grating surface vicinity. In the vicinity of the center portion of the fixing plate 14, a bolt hole 14 a that is an opening having a counterbore is provided. The bolt that connects the grating and the receiving frame uses an M16 bolt, and the size of the bolt hole 14a is 20 mm, which is slightly larger than the bolt diameter.

<Structure of receiving frame>
Next, the structure of the receiving frame 2 will be described with reference to FIG.
2A is a top view of the receiving frame 2, FIG. 2B is a local side view including a bolt fixing mechanism, and FIG. 2C is a side view of a side surface orthogonal to (b).
The receiving frame 2 includes a parallel plate 21, a vertical plate 22, a bolt fixing mechanism 23 fixed on the parallel plate 21, and an anchor 24. The bolt fixing mechanism 23 is located almost directly below the bolt hole 14a when the grating 1 is installed.

The bolt fixing mechanism 23 will be described with reference to FIGS. 3 and 4. 3 and 4 are views seen from the side.
The bolt fixing mechanism 23 includes a bolt fixing mechanism main part 25, a height adjusting part 26, and a cap 27.

The bolt fixing mechanism main part 25 has a substantially rectangular parallelepiped shape with at least one side surface opened. In the present embodiment, the bolt fixing mechanism main part 25 is formed by bending a metal plate into a C shape.
A bolt opening 25 a having a diameter of 20 mm is opened at the center of the upper surface of the bolt fixing mechanism main portion 25.
The bolt fixing mechanism main part 25 has a nut 25b. The nut 25b is a hex nut, and its rotation is restricted within the bolt fixing mechanism main part 25. On the other hand, the nut 25 b has a gap that can move in the horizontal direction within the bolt fixing mechanism main portion 25. The reason why at least one side surface of the bolt fixing mechanism main portion 25 is open is to put the nut 25b therein.

  The height adjusting unit 26 is provided according to the height of the grating, and is provided to make the vertical interval between the fixing plate 14 and the bolt fixing mechanism main part 25 constant when the grating 1 is installed. . By providing the height adjusting portion 26, it is possible to always use bolts having the same length.

  The cap 27 has a bolt opening 27a on the upper surface and is made of a flexible material capable of covering the entire bolt fixing mechanism main portion 25. As shown in FIGS. 3 and 4, the cap 27 is attached from above the bolt fixing mechanism main part 25. When the cap 27 is attached to the bolt fixing mechanism main portion 25, the side surface of the bolt fixing mechanism main portion 25 is covered, so that the nut 25 b can be retained in the bolt fixing mechanism main portion 25.

<Grating and fixing method of receiving frame>
A method for fixing the grating and the receiving frame will be described with reference to FIGS.
First, as shown in FIG. 5, the grating 1 is placed on the receiving frame 2 and fixed with bolts 3 that are flat head screws. FIG. 5B shows a fixed state.

FIG. 6 shows an enlarged view of the main part related to fixing.
When the tip of the bolt 3 inserted from the bolt hole 14a is inserted into the nut 25b and the bolt 3 is rotated, the rotation of the nut 25b is restricted, so that the nut 25b rises along the thread of the bolt 3. The state in which the nut 25a has reached the back side of the upper surface of the bolt fixing mechanism main part 25 is the state of FIG. When the bolt 3 is further tightened, the upper surface of the cap 27, which is a flexible material, contracts, and the bottom surface of the bearing bar 12 reaches almost the parallel plate of the receiving frame 2. Further, the head of the bolt 3 fits in the counterbore of the bolt hole 14a.
As described above, the grating 1 and the receiving frame 2 are firmly fixed.

  In addition, as a method of restricting the rotation of the nut 25b, the inner width of the bolt fixing mechanism main part 25 may be narrowed, or the nut 25b is placed on the U-shaped restriction plate, and the restriction plate and the nut are placed. 25b may be put in the main part 25 of the bolt fixing mechanism.

<Features of the present invention>
The features of the grating and receiving frame fixing mechanism according to the present invention will be summarized below.
First, since a large gap does not occur in the notch portion of the grating, a gap cap is unnecessary. Therefore, the number of parts is reduced, and the cost can be reduced.

  Secondly, since the bolt is accommodated in the counterbore, there is no fear that the bolt is damaged or the screw is loosened due to passage of the automobile or the like.

  Third, by tightening the bolt, the grating and the receiving frame can be firmly fixed. Adjustment such as inserting a washer is unnecessary, and construction can be performed smoothly.

  Fourth, by providing a gap in which the nut moves in the horizontal direction, it is possible to make a large manufacturing intersection, facilitating manufacturing, and improving yield.

Fifth, by providing the cap that covers the main part of the bolt fixing mechanism, the nut is not lost from the main part of the bolt fixing mechanism.
In addition, even if the grating or the receiving frame is distorted, the flexible cap can be deformed to absorb the distortion, so that the grating and the receiving frame can be fixed uniformly without rattling.
Furthermore, vibration and noise can be reduced. Conventionally, in order to reduce vibration and noise, it has been necessary to spread rubber or the like over the entire area of the flat plate of the receiving frame. However, a material cost can be reduced because a cap may be provided instead. .

  Sixth, by forming the main part of the bolt fixing mechanism by bending a metal plate into a C shape, a strong structure can be realized with a small amount of material. In addition, since the C-shaped open portion becomes a vertical space in which the bolt enters, the intersection of the bolt and the bolt fixing mechanism can be further increased.

  Seventh, by providing a height adjusting unit for adjusting the height as the bolt fixing mechanism, it is possible to cope with gratings having different heights without changing the main part of the bolt fixing mechanism, the bolt, or the like. Therefore, the types of parts to be prepared are reduced, and parts management is facilitated.

DESCRIPTION OF SYMBOLS 1 Grating 11 Side bar 12 Bearing bar 13 Cross bar 14 Fixing plate 14a Bolt hole 2 Receiving frame 21 Flat plate 22 Vertical plate 23 Bolt fixing mechanism 24 Anchor 25 Bolt fixing mechanism main part 25a Bolt opening 25b Nut 26 Height adjustment part 27 Cap 27a Bolt opening 3 Bolt

Claims (6)

A fixing plate provided with a bolt hole which is an opening having a counterbore fixed in the vicinity of the surface of the grating in the notch portion of the grating;
A bolt fixing mechanism fixed to the upper part of the receiving frame and having an opening for bolts on the upper part;
A bolt for screwing the fixing plate and the bolt fixing mechanism;
With
The bolt fixing mechanism has a nut corresponding to the bolt,
A fixing mechanism for a grating and a receiving frame, wherein the nut has a gap in which rotation is restricted in the bolt fixing mechanism and is movable in the horizontal direction. The fixing mechanism for a grating and receiving frame according to claim 1, further comprising a cap made of a material having a bolt opening on an upper surface, covering the bolt fixing mechanism and made of a flexible material. The fixing mechanism for a grating and receiving frame according to claim 1 or 2, wherein the bolt fixing mechanism has a substantially rectangular parallelepiped shape with at least one side surface opened. The grating and receiving frame fixing mechanism according to claim 3, wherein the bolt fixing mechanism is formed by bending a metal plate into a C-shape. The grating and receiving frame fixing mechanism according to any one of claims 1 to 4, wherein the bolt fixing mechanism further includes a height adjusting unit for adjusting the height. A groove structure comprising the grating and receiving frame fixing mechanism according to claim 1.