JPH0538084U - Taper receiving grating receiving frame - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a taper receiving grating in which curb concrete of grating of road crossing groove is hard to be damaged. A grating main body 1 having a rectangular planar shape and a tapered portion 2 formed as a supported surface on two opposite sides thereof, and a tapered portion 4 fitted to the tapered portion to support the grating main body. In a receiving frame of taper receiving grating composed of a receiving frame 23 having a receiving portion 5 formed with, the receiving frame has an outer surface portion 20 positioned on both outer sides of the receiving portion at a predetermined distance apart in parallel to the receiving portion, An outer frame portion 22 constituted by a plurality of connecting portions 21 integrally connecting the outer surface portion to the receiving portion is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a frame for a taper receiving grating installed in a groove crossing a road on a heavy road.

[0002]

[Prior Art]

 Gratings installed across the road must be installed so that they do not rattle when vehicles pass by. There have been several proposals for this rattling prevention method. The main ones are bolt fixing type, cushion type using packing or spring, taper adjusting type, etc., but this invention will improve the taper receiving type, that is, the taper receiving grating. It is. As shown in FIGS. 4 and 5, for example, a conventional taper receiving grating is made of cast iron, and the grating body 1 is formed in a rectangular planar shape, and two rectangular sides thereof serve as supported surfaces. Usually, 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 taper portion 4 that fits into and supports the tapered portion 2 of the grating body 1. There is. The receiving frame 3 is provided with projecting edges 6 on both sides of the lower edge of the receiving part 5 for strongly fixing it to the opening of the groove, and anchor bolt insertion holes 7 are formed in the projecting edges 6. It is fixed with anchor bolts 8 and hardened with concrete 9 as shown in FIG. In the figure, 10 is a reinforcing rib, 11 is a groove provided with grating, 12 is a hinge portion, and 13 is a through hole formed in the projecting edge 6.

[0003]

[Problems to be solved by the device]

 Since the conventional taper receiving grating shown in FIGS. 4 and 5 originally receives a load when the vehicle passes therethrough, the taper portions 2 and 4 are fitted more deeply. It maintains a good condition without rattling. However, in the case of the one used for the transverse groove of the heavy road through which heavy vehicles pass, there is no abnormality in the grating body 1 and the receiving frame 3, but the curb concrete outside the receiving frame 3 is damaged. I knew it was. Also, even when used in a crossing groove on a light road, there is damage to the curb concrete, but most of the damage is due to the step on the curb concrete part, which causes impact on the grating and curb concrete when the vehicle passes. There are cases in which loads are applied, concrete material is inferior, and anchor bolts are not used, all of which are poorly constructed. The cause of this poor construction can be avoided by careful construction. However, when it is used for heavy roads, it is not accurate to say that the curbstone concrete will be damaged only due to poor construction of the curbstone concrete. There is a problem in that the conventional receiving frame has a structure that depends too much on the rigidity of the curb concrete, and is easily affected by the quality of concrete processing.

That is, generally, in the receiving frame 3 of the conventional taper receiving grating as described above, when the load W is applied to the grating without the backup by the curb concrete, the degree of fitting of the taper fitting portion progresses. , As shown by an imaginary line 3a in FIG. 6A, it is transformed into a drum shape. This state is a state in which four points on both ends of the taper contact surface are in contact with each other, and at this point P, the receiving frame 3 has an outward acting force N perpendicular to the taper surface, as shown in FIG. 6 (b). In this state, the receiving portion 5 receives a bending moment with its both ends as fulcrums. Even if curb concrete is provided, such a tendency appears even if the amount of deformation is small, and it is considered that the curb concrete is used to counter this deformation in the past. Therefore, the quality of construction of curb concrete has a great influence on the life of curb concrete.

A technical object of the present invention is to provide a taper receiving grating in which the curb concrete of the grating of the road crossing groove is not easily damaged.

[0006]

[Means for Solving the Problems]

 This invention has a grating body having a rectangular planar shape and a taper portion formed as a supported surface on two opposite sides thereof, and a taper portion which is fitted to the taper portion to support the grating body. In a receiving frame having a tapered receiving grating, the receiving frame is formed on both outer sides of the receiving part and is spaced apart by a predetermined dimension from the outer surface part and the outer surface part. Is provided with an outer frame portion configured by a plurality of connecting portions that are integrally connected to the receiving portion.

[0007]

[Action]

 According to this method, the rigidity of the receiving part is increased by providing the outer frame part than before, and when the receiving frame is installed in the road crossing groove, the outer frame part is not covered during curb concrete. It is buried and filled with concrete between the receiving part and the outer surface part, which further increases the rigidity of the receiving part. Therefore, the deformation tendency of the drum shape as shown in FIG. 6A is suppressed, and the repeated load can be opposed for a long time.

[0008]

【Example】

 An embodiment of this 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 in the receiving frame 23.

The outer surface portion 20 has the same vertical dimension as that of the receiving portion 5 having the same structure as that of the conventional one, and is located parallel to the outside of each of the receiving portions 5 with a predetermined distance, and has the same length as the receiving portion 5. It is shaped like a plate. The connecting portion 21 fixedly connects the receiving portion 5 and the outer surface portion 20 and is formed in the same plate shape as the outer surface portion 20. The receiving frame 23 provided with the outer frame 22 is a cast product made of cast iron integrally with the outer frame 22. The projecting edge 6 at the lower end of the receiving portion 5 is provided substantially in the same manner as the conventional one, but the reinforcing rib 10 is omitted because the connecting portion 21 is provided. In the figure, the same parts as those of the conventional one shown in FIGS. 4 and 5 are designated by the same reference numerals and the description thereof will be omitted.

The taper receiving grating thus configured is constructed as shown in FIG. In the figure, 30 is an anchor bolt, 31 is a reinforcing bar, 32 is concrete, 33 is a concrete formwork, and 34 is a road surface. As shown in the figure, the concrete 32 is filled inside and outside the outer frame portion 22.

The taper receiving grating constructed as shown in FIG. 1 has a structure as shown in FIG. 6 due to an outward acting force acting on the taper portion 4 of the receiving portion 5 when a load due to the passage of a vehicle is received. Even if a drum-shaped deformation tendency is generated, the rigidity of the receiving portion 5 is significantly increased due to the large compressive strength of the outer frame portion 22 and the concrete filled inside the outer frame portion 22, so that the deformation tendency is suppressed. Therefore, the curb concrete part is not damaged. In order to increase the rigidity of the receiving portion 5, it is conceivable that the casting is formed into a box shape as shown by the phantom line 14 in FIG. 5, but this increases the amount of casting used and the hollow portion. It is not applicable because it requires an expensive core sand mold for forming, which is inferior in economic efficiency, and the workability is poor because it interferes with anchor bolt installation and concrete driving.

[0012]

[Effect of the device]

 According to this invention, since the rigidity of the receiving portion having the taper portion is effectively increased, that is, the structure of the outer frame portion in which the amount of casting used is small, has a high compressive strength of the concrete filled therein. Since the rigidity of the receiving part is enhanced by making good use of the characteristics, taper receiving gratings for grooves that cross the road where heavy vehicles pass can be easily installed so that the curbstone concrete is not easily damaged. The effect that it can be provided at low cost is achieved.

[Brief description of drawings]

1 is a cross-sectional view perpendicular to a groove (corresponding to the AA cross section of FIG. 2) showing an embodiment of the present invention together with a construction state.

FIG. 2 is a plan view of the same embodiment.

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

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

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

6A and 6B are schematic plan views showing a deformed state when a load is applied to a grating body of a conventional taper receiving grating, and FIG. 6B is a schematic sectional view showing a direction of a force acting on a receiving frame. Is.

[Explanation of symbols]

 1 Grating main body 2 Tapered part 4 Tapered part 5 Receiving part 6 Projection edge 11 Groove 20 Outer surface part 21 Connecting part 22 Outer frame part 23 Receiving frame 32 Concrete

Claims (1)

[Scope of utility model registration request] 1. A planar shape is a rectangle and the two facing each other.
Of the tapered receiving grating including a grating main body having a tapered portion formed as a supported surface on a side and a receiving frame having a receiving portion formed with a tapered portion so as to be fitted into the tapered portion to support the grating main body. In the receiving frame, the receiving frame has an outer surface portion which is located on both outer sides of the receiving portion at a predetermined distance from each other and is parallel to the receiving portion, and a plurality of connecting portions integrally connecting the outer surface portion to the receiving portion. A receiving frame for taper receiving grating, which is provided with an outer frame portion configured by.