JPS597942Y2 - log stairs - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to improvements to log stairs that facilitate walking on slopes on mountain trails and park trails.

On mountain trails and in parks, there are few places where the sidewalks are flat, and most of them are sloped.

On steep slopes, for the convenience of pedestrians, it is common practice to mound earth in the form of steps and use stone or concrete artificial trees to maintain the shape.

However, artificial wood made of stone or concrete is heavy and difficult to work with.

This is a major drawback because most of the places where such sidewalks are constructed are areas where trucks cannot enter and where it is difficult to use various construction machines.

Furthermore, stairs made of stone or concrete made of artificial wood are too hard, and when used by pedestrians, the impact is transmitted through their feet and throughout their entire body, and the continuous impact on long stairs in particular causes great fatigue to pedestrians.

In particular, using concrete artificial trees on mountain trails or in parks is problematic because they do not blend in with the surrounding landscape.

In order to improve these drawbacks, some people have conventionally used logs instead of stone or concrete artificial trees.

However, if you use logs as they are, they will be slippery and dangerous due to their round shape.

This danger is especially great when it rains and the surface gets wet, and it is a big problem because log stages are used in parks, mountain trails, etc., and are intended for the general public.

Also, because the upper part is round, it has little effect on preventing soil from washing away during rain.

As a result of diligent efforts to improve the above points, this invention has a semi-permanently effective anti-slip effect by cutting off a portion of the top of the crossbar log, and is highly effective in preventing soil runoff. He discovered that it was possible to create a log staircase with a diameter of 100 mm, and perfected the invention.

In other words, the present invention preserves natural beauty, prevents earth and sand from flowing out, prevents pedestrians from slipping and eliminates fatigue, and is economical in raw material costs and easy to construct. The purpose is to provide log stairs.

Hereinafter, the present invention will be explained according to illustrated embodiments.

A is a log staircase, in which embankment 6 is dammed up and down by a fence body a formed by connecting crosspieces 1 and wooden stakes 3.

Both the crosspiece 1 and the wooden stake 3 are made of logs, and the top of the crosspiece 1 is 5 to 60', preferably 10, in the direction parallel to the width of the stairs and opposite to the original slope of the stairs with respect to the horizontal plane. At an angle of ~30°, the width of the cut surface is ~100% of the log diameter.
Preferably, the cut surface 2 is 30 to 70%.

The preferred angle and width of the cut surface are determined by the soil quality and other conditions where the log staircase is installed and are not constant.

The number of crosspieces 1 depends on the diameter of the log used, the height of the riser of the stairs,
It is determined by the strength of the log and is not particularly limited.

The crosspiece 1 is fixed to the wooden stake 3 with bolts 4 to prevent it from rolling.

In addition to using wooden stakes, there are other ways to secure the structure using metal stakes, stones, and other materials.

One example of the application of this invention is when the ground is highly sloped or the log has major defects such as knots or bends, and since touching the log will make it unstable, the upper and lower parts of the crossbar 1 should be 10-80% of the diameter of the log, preferably 30-60%
% and cut parallel to the ground.

In this case, cutting is not limited to the upper and lower parts of all the crossbars 1, but depending on the situation, it is also possible to not cut some of the crossbars 1, or to not cut either the upper or the lower part. .

And in all of these, the top is 55 degrees parallel to the width of the stairs, and in the opposite direction to the original slope of the stairs with respect to the horizontal plane.
The angle is ~60°, preferably 10-30°, and the cutting width is 10-100% of the diameter of the log, preferably 30-70%.
Attach the cut surface 2.

In addition, when actually used, it is desirable to perform appropriate antiseptic and insect repellent treatment in advance, as it will rot in a relatively short period of time or be damaged by termites and other pests.

As mentioned above, in the present invention, in a staircase in which the earth is filled in a step-like manner and is reinforced with logs so that the shape does not collapse, the upper part of the crosspiece 1 is set 55 degrees in the opposite direction to the original slope of the staircase with respect to the ground. at an angle of ~60° and l of the crosspiece diameter
Since the log staircase was constructed by shaping the cut surface 2 with a width of O to 100%, the natural scenery is improved compared to the conventional method of simply nailing rubber non-slip. It can be maintained without damage, the anti-slip effect is semi-permanent, and although the shape of the crosspiece 1 at the part of the cut surface 2 that is buried in the mound is not important, it has the effect of making it possible to effectively use wastewater, etc. The purpose of the period will be achieved.

Example 1 A cut surface 2 with a width of 7 cm and an angle of 20 degrees with the ground is attached to the upper tier of a crosspiece 1 of a cedar log with a diameter of 12 cm and a length of 1.5 m.

Move this crosspiece 1 two times. Diameter 8crn, length 60c
Place m-sized cedar log stakes 3 at both ends of crosspiece 1, 10 cm from the ends.
Open one hole at a time and drive it into the ground so that the bottom is 2/3 full.

The pile 3 and the crosspiece 1 are connected with bolts 4. Compared to conventional log stairs, this log staircase was easier to walk on, prevented people from tripping even when the surface was wet during rain, and minimized the risk of mud flowing.

Example-2 Crossbars 1 and 2 of cedar logs with a diameter of 12 cm and a length of 1.5 m
At the top and bottom of each log, for the lower log, both are parallel to the ground, and for the upper log, the lower part is parallel to the ground, and the upper part is at a 20° angle to the ground, and each cut surface is It was cut to a width of 7 cm.

This crosspiece 1 was fixed using stakes 3 in the same manner as in Example-1.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the log staircase, Fig. 2 is a side view, Fig. 3 is a top view, Fig. 4 is a front view, and Fig. 5 is a side view of the log staircase described in Example-2. . 1... Crosspiece, 2... Cutting surface, 3...
...Pile, 4...Bolt, 5...Ground surface.

Claims (2)

[Scope of utility model registration request] (1) For stairs where the earth is filled in steps and reinforced with logs so that the shape does not collapse, the upper part of the rung should be at an angle of 5 to 60 degrees to the ground in the opposite direction to the slope of the main stairway, and , a log staircase formed with a cut surface having a width of 10 to 100% of the diameter of the crosspiece. (2) Scope of utility model registration claims (1) where all or some of the crossbars have a cut surface parallel to the ground at the upper and lower portions, the width of which is 10 to 80% of the diameter of the crossbars. (1) The log staircase described in.