JP2548606Y2 - Taper receiving grating receiving frame - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates mainly to a receiving frame of a tapered receiving grating installed in a groove crossing a road on a heavy carriageway.

[0002]

2. Description of the Related Art Gratings installed across a road need to be installed so that they do not rattle due to the passage of vehicles. There have been several proposals for this rattling prevention method. The main ones are the bolt fixing type, the cushion type using packing or spring, the taper type, and the like. This invention is to improve the taper type, that is, to improve the taper receiving grating. It is assumed that. The conventional taper-receiving grating is made of cast iron, for example, as shown in FIGS. 4 and 5, the grating body 1 is formed in a rectangular planar shape, and two opposing sides of the rectangle are usually used as supported surfaces. The tapered portion 2 is formed at an angle of 9 degrees, and the receiving frame 3 has a receiving portion 5 formed with a tapered portion 4 that fits into and supports the tapered portion 2 of the grating main body 1. The receiving frame 3 is provided with protruding edges 6 on both sides of the lower edge of the receiving portion 5 for strongly fixing the opening portion of the groove, and through which an anchor bolt insertion hole 7 is formed. As shown, it is fixed with anchor bolts 8 and hardened with concrete 9. In the figure, 10 is a reinforcing rib, 11 is a groove provided with a grating, 12 is a hinge, and 13 is a protruding edge 6.
Is a through-hole.

[0003]

In the conventional taper receiving grating shown in FIGS. 4 and 5, a load is originally applied when a vehicle passes over the grating, so that the fitting of the tapered portions 2 and 4 becomes impossible. Since it becomes deeper, it maintains a good state without rattling. However,
It was found that the grating body 1 and the receiving frame 3 did not have any abnormality in the one used for the crossing groove of the heavy road on which the heavy vehicle passes, but there was a problem that the curb concrete outside the receiving frame 3 was damaged. . In addition, curb concrete may be damaged when used in crossing grooves on light roads,
Many of the causes of the damage include steps in the curb concrete area that cause impact load to act on the grating and curb concrete as the vehicle passes, when the concrete material is poor, or when anchor bolts are used. Are not used, and these are all poor constructions. The cause of this construction failure can be avoided by careful construction. However, when used for heavy roads, it is not accurate to say that the curb concrete will be damaged only by improper construction of the curb concrete. There is a problem in that the conventional receiving frame has a configuration in which its rigidity is excessively dependent on curb concrete, and is easily affected by the quality of concrete construction.

That is, in general, the receiving frame 3 of the conventional tapered receiving grating as described above has a load W on the grating without backing up by curb concrete.
Is added, the degree of fitting of the tapered fitting part advances, and FIG.
As shown by the imaginary line 3a in FIG.
This state is a state in which the tapered contact surface indicated by P is in contact at four points on both ends, and at this point P, the receiving frame 3 is as shown in FIG.
As shown in FIG. 5, the receiving portion 5 is receiving an outward acting force N perpendicular to the tapered surface, and a bending moment is applied to the receiving portion 5 with its both ends serving as fulcrums. Such a tendency appears even if curb concrete is provided, even if the amount of deformation is small. Conventionally, it is considered that this deformation is countered by curb concrete. Therefore, the construction of the curb concrete greatly affects the life of the curb concrete.

[0005] It is a technical object of the present invention to provide a taper-receiving grating that is hard to damage the curb concrete of the grating of the road crossing groove.

[0006]

According to the present invention, there is provided a grating body having a rectangular planar shape and having a tapered portion formed as a supported surface on two opposing sides thereof, and a grating body fitted to the tapered portion. And a receiving frame having a receiving portion having a tapered portion formed to support the tapered portion. In the receiving frame of the tapered receiving grating, the receiving frame is located on both outer sides of the receiving portion and separated by a predetermined distance in parallel with the receiving portion. An outer frame portion comprising an outer surface portion and a plurality of connecting portions integrally connecting the outer surface portion to the receiving portion is provided.

[0007]

According to this means, the rigidity of the receiving portion itself is increased by providing the outer frame portion, and the outer frame portion is made of curb concrete when the receiving frame is installed in the road crossing groove. And the concrete is filled between the receiving part and the outer surface part, thereby further surely increasing the rigidity of the receiving part. Therefore, the tendency of the drum to be deformed as shown in FIG. 6A is suppressed, and the load can be repeatedly applied for a long period of time.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. The main difference of this embodiment from the conventional one shown in FIGS. 4 and 5 is that an outer frame portion 22 composed of an outer surface portion 20 and a connecting portion 21 is provided on a receiving frame 23.

The outer surface 20 is provided with a receiving portion 5 having the same configuration as the conventional one.
The upper and lower dimensions are the same as the upper and lower dimensions, and are located parallel to each other at a predetermined distance outside each of the receiving portions 5 and are formed in a plate shape having the same length as the receiving portions 5. The connecting portion 21 is for fixedly connecting the receiving portion 5 and the outer surface portion 20, and the outer surface portion 2
0 is formed in the same plate shape. The receiving frame 23 provided with the outer frame 22 is a cast product made of cast iron integrated with the outer frame 22. The protruding edge 6 at the lower end of the receiving portion 5 is provided substantially in the same manner as in the related art, but the reinforcing rib 10 is omitted because the connecting portion 21 is provided. In the figure, the same parts as those of the related art shown in FIGS. 4 and 5 are denoted by the same reference numerals, and description thereof is omitted.

[0010] The taper receiving grating constructed as described above is constructed as shown in FIG. 3 in FIG.
0 is an anchor bolt, 31 is a reinforcing bar, 32 is concrete, 33 is a concrete formwork, and 34 is a road surface. As can be seen in the figure, the concrete 32 is filled inside and outside the outer frame portion 22.

[0011] The tapered receiving grating constructed as shown in FIG.
Even if the outwardly acting force acting on the tapered portion 4 causes the drum-shaped deformation of the receiving frame as described with reference to FIG. 6, the compression resistance of the outer frame portion 22 and the concrete filled therein is reduced. Since the rigidity of the receiving portion 5 is greatly increased by being large, the deformation tendency is suppressed, and the curb concrete portion is not damaged. In order to increase the rigidity of the receiving portion 5, it is conceivable that the receiving portion 5 is formed in a box shape by casting as shown by the imaginary line 14 in FIG. 5. However, this increases the usage of the casting or forms a hollow portion. It is not economical because it requires an expensive core sand mold to perform the work, and it is difficult to install anchor bolts and drive concrete.

[0012]

According to the present invention, the rigidity of the receiving portion having the tapered portion is effectively increased, that is, the structure of the outer frame portion that uses a small amount of casting reduces the compression resistance of the concrete filled therein. Since the rigidity of the receiving part is enhanced by making good use of the high strength characteristics, it is easy to make the tapered receiving grating for grooves crossing the road where heavy vehicles pass, so that the curb concrete is not easily damaged. And can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken at right angles to a groove (corresponding to a cross section taken along the line AA in FIG. 2) showing an embodiment of the present invention together with a construction state.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a plan view of a conventional taper receiving grating.

FIG. 5 is a sectional view taken along line CC of FIG. 4;

6A and 6B show a state in which a load is applied to a grating main body of a conventional taper receiving grating, where FIG. 6A is a schematic plan view showing a deformed state, and FIG. 6B is a schematic sectional view showing a direction of a force acting on a receiving frame. It is.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grating main body 2 Taper part 4 Taper part 5 Receiving part 6 Ridge 11 Groove 20 Outer surface part 21 Connecting part 22 Outer frame part 23 Receiving frame 32 Concrete

Claims (1)

(57) [Scope of request for utility model registration] 1. A planar shape which is rectangular and whose opposite
Of a grating main body having a tapered portion formed as a supported surface on a side thereof, and a receiving frame having a receiving portion having a tapered portion formed so as to be fitted to the tapered portion and to support the grating main body. In the receiving frame, the receiving frame is separated by a predetermined distance on both outer sides of the receiving portion and is located in parallel with the receiving portion, and a plurality of connecting portions integrally connecting the outer surface portion to the receiving portion. And a receiving frame for a tapered receiving grating.