JPH0131604Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention creates a gentle slope by laying multiple treads on the step between the road and the sidewalk, or at the boundary between a car hold or a residential area, making it easier for cars to enter. The present invention relates to a step plate device for a step on a road surface.

Generally, this kind of thing is made of iron plate (mainly striped steel plate)
There are various types of treads on the market, such as those made of steel, cast iron (mainly ordinary cast iron), and cement, but in actual construction, these treads are simply laid out in a row on the step part of the road surface. When entering a car, etc., the footboards would move or jump up one by one, causing problems such as misalignment and noise (high-pitched rattles and thumps). In particular, when cars climbed up diagonally from the end of a row of treads, the entire tread would shift laterally, making it extremely troublesome to repair. In addition, it has poor cushioning, and when people step on it, it feels hard on their feet, so in places with a lot of foot traffic, such as stores, mats are often placed on top of the treads. There was a risk of a slip accident due to misalignment.

This idea was devised in view of the above circumstances, and its purpose is to provide high impact resistance, excellent corrosion and abrasion resistance, and to prevent not only individual treads from swinging or jumping up, but also from lateral slipping of the entire tread. Without,
Moreover, it is an object of the present invention to provide a step board device for road steps that has excellent cushioning properties, is noiseless, and is extremely practical.

In other words, in the road surface step step device of this invention, the step boards laid in a line on the road surface step are made of heavy products such as ductile cast iron, and
Adjacent treads are bolted together using side plates protruding from the back of each, and at least one of the side plate parts of both the triangular tread and the adjacent tread placed at the end of the row of treads. By tilting the side plates in the direction of separating them from the other side and fastening the two side plate parts in a joined state by tightening bolts, the lower ends of the oblique sides of the top plate parts of the tread plates at both ends are positioned below the side plate parts of the respective tread plates. The configuration allows the intermediate tread to be raised several millimeters from the road surface so that the overall cross-section has an inverted ship shape, and the end treads to be set in contact with the road surface. The structure is made of elastic material, which prevents each tread from individually moving or jumping up, and also allows the treads at both ends to firmly press against the road surface, and the elastic material on the back of each tread. Due to the synergistic effect, even if the car rides diagonally from the side edge, there is no overall lateral shift and it remains in the fixed position, and the top surface of the footplate becomes elastic when a person or car gets on it. Not only does it sink in to ease the shock, but the elastic material on the back side does not make any rattling noises, making it extremely practical.

An embodiment of this invention will be described below with reference to the drawings. Fig. 1 shows an example of the state in which the tread device of the present invention is installed on a step formed by a concrete L-shaped edge block 3 at the boundary between the roadway 1 and the sidewalk 2, and Fig. The partially enlarged plan view, FIGS. 3 and 4 are sectional views taken along lines - and - in FIG. 2.

Here, in the figure, 4 is a plurality of intermediate treads arranged in a row, 5 is an end tread plate arranged at both ends of the row of intermediate treads 4, and all these treads 4 and 5 have FCDs of 45 to 50. Constructed of heavy metal materials with excellent strength, corrosion resistance, and wear resistance, such as ductile cast iron.

To further explain the structure of each part in detail, each of the intermediate treads 4 has a slightly rectangular top plate part 4a with a non-slip unevenness on the upper surface, and a rib-shaped top plate part 4a that extends long in the front and back direction on both ends of the back surface. side plate portion 4b
In almost the same way, there is a reinforcing rib 4 protruding from the center of the back surface.
The end tread 5 has a top plate portion 5a having a substantially right triangular shape in plan and having non-slip irregularities similar to those described above on the upper surface, and the top plate portion 5.
A side plate portion 5b is provided on the inner end side of the back surface of the top plate portion 5a and extends in the front and back direction, and a side plate portion 5b is provided protruding from the inner end side toward the rear side of the back surface of the top plate portion 5a from the inner end side to the outer end side. It has a structure consisting of reinforcing ribs 5c. In addition, all the side plate parts 4b of each of the intermediate treads 4 have a shape in which the rear end protrudes largely (lengthwise), and the front end gradually becomes smaller so that it is flush with the back surface. All of the footboards 4 are installed in a gentle slope that slopes downward toward the front. Further, the side plate portion 5b of the end tread plate 5 is similar to the side plate portion 4a of the intermediate tread plate 4, and the reinforcing rib 5c is perpendicular to the side plate portion 5b.
The footboard 5 is triangular in shape, and the footboard 5 at the end is slanted toward the front from the inner end to the outer end.

Each of these footboards 4, 5 has a respective side plate portion 4.
A bolt hole 6 is formed near the rear end of a, 5a,
The side plate portions of adjacent footboards are fastened to each other by bolts and nuts 7 through the bolt holes 6.

Further, elastic materials 8 such as rubber packings are adhered to all the road surface contact portions on the back surfaces of each of the footboards 4 and 5, so that the footboards come into contact with the ground via the respective elastic materials 8.

Further, the side plate portions 4b of each intermediate tread plate 4 are provided to protrude perpendicularly, that is, perpendicularly, to the top plate portion 4a, and the side plate portions 5b of the triangular tread plates 5 at both ends are preliminarily formed as shown in FIG. 5a. It is inclined in the direction away from the adjacent side plate part 4b, that is, inclined inward by an angle θ with respect to the vertical plane, and is provided in a wedge-shaped manner before being bolted to the adjacent side plate part 4b. When a gap is created and the bolts are tightened, the structure is such that it is tightly joined to the adjacent side plate part 4b for the first time as shown in FIG. The lower end of a certain oblique side is located below the side plate portions 4b and 5b of each of the treads 4 and 5, and when laying on the road surface, the cross section as a whole becomes an inverted ship shape, and the intermediate tread 4 rises a gap t (several millimeters) from the road surface. However, in order to take on that load, the footboards 5 at both ends
The outer edge of the tire is configured to bite into the road surface.
In fact, the provision of the elastic material 8 prevents the both end treads 5 from biting into the road surface or the intermediate tread board 4 together with the elastic material 8 from completely lifting off the road surface.

In the road step step device having the above-described configuration, since the step boards 4 and 5 arranged in a row are all fastened with bolts and nuts 7,
There is no longer any individual movement or jumping up and down. Furthermore, each of the treads 4 and 5 is made of ductile cast iron and has a considerable weight, and is fastened to have an inverted ship shape overall in cross section, so that the intermediate tread 4 is floated to such an extent that it does not press the elastic member 8, and conversely, the treads at both ends are Since the treads 5 are firmly attached to the road surface through the elastic material 8, even if a car or the like rides diagonally from the tread 5 at the end, the treads 4 and 5 will shift laterally. It always remains installed in the fixed position without any problems. Also, if a person or car gets on top of each footplate 4 and 5,
are able to elastically sink several millimeters under each other's load, exhibiting cushioning properties and relieving shocks. - No more rumbling noise.

Note that this invention is not limited to the above-described embodiment; for example, the side plate 5b of the end tread 5 is inclined by an angle θ, but the side plate 4b of the intermediate tread 4 adjacent thereto may be inclined, It is also possible to incline both side plate portions 4b and 5b. In addition, various changes may be made to the configurations of other parts as long as they do not depart from the gist of this invention.

Since this idea was developed as described above, it is strong against impact, has excellent corrosion and abrasion resistance, and eliminates lateral slipping of the entire tread, as well as free movement and jumping up of individual treads, and has excellent cushioning properties to reduce shock. Not only that, but it also eliminates rattling noise, which is very effective in practical terms.

[Brief explanation of drawings]

The drawing shows one embodiment of this invention.
The figure is a perspective view of the device in use, installed on a step on the road surface.
Fig. 2 is an enlarged plan view of the same part, Fig. 3 is a sectional view taken along the - line in Fig. 2, Fig. 4 is a sectional view taken along the - line in Fig. 2, and Fig. 5 is an explanatory diagram of the operation of the main parts. FIG. 5a is a diagram of the state before the bolts are tightened, and FIG. 5b is a diagram of the state after the bolts are tightened. 1... Roadway, 2... Sidewalk, 3... L-shaped edge block,
4, 5...Treadboard, 4a, 5a...Top plate part, 4
b, 5b...Side plate part, 4c, 5c...Reinforcement rib,
6...Bolt hole, 7...Bolt/Nut, 8...
elastic material.

Claims (1)

[Scope of utility model registration request] In a road step tread device that constructs a gentle slope of a required width by laying a plurality of treads on a road surface step such as the boundary between a roadway and a sidewalk, each of the treads is a heavy product made of ductile cast iron or the like. The intermediate treads in the row of treads, excluding the treads at both ends, have a rectangular top plate, and the front side of the top plate is inclined forward downward so that it touches the road surface. In addition, the adjacent tread plates in the middle are bolted to the side plate part on the back side, and the top plate part of the tread plates at both ends is approximately right triangular in shape, and the top plate part is in the shape of a right triangle, and the tread plates at both ends are shaped like a right triangle. The structure has a side plate part on the back surface of the inner end side of the top plate part which is connected to the intermediate tread plate so that the oblique side part of the top plate part in the shape of a right triangle is in contact with the road surface. At least one of the side plate portions on the back of both the tread plates at both ends and the intermediate tread plate connected thereto is inclined inwardly away from the other as it goes toward the lower end, and both side plate portions are tightened together with bolts. and are fastened to each other in a joined state, so that the lower ends of the oblique sides of the top plate portions of the tread plates at both ends are located below the side plate portions of each of the tread plates, so that the entire tread row has a substantially inverted boat-shaped cross section. A step plate device for a step on a road surface further comprising an elastic material provided on the back side road surface portion of each step plate.