JPH0724403Y2 - Surface structure of athletic track track - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a surface structure of a running track of an athletic stadium which has an excellent usability and is easy to construct and clean.

[Conventional technology]

Conventionally, the track track and the field runway on an all-weather pavement track are uneven to prevent the runners from slipping. This concavo-convex structure can be obtained, for example, by removing a synthetic resin chip (particle size 3 to 10 mm) on the coating layer before the coating layer is cured, and curing the pavement surface in that state. Can be obtained by
52-6540). The paved surface obtained in this way is
As shown in FIG. 12, the chip 2 protruding from the coating layer 1 usually forms an uneven surface having a height difference of 3 to 5 mm. Reference numeral 3 is a base layer.

[Problems to be solved by the invention]

However, when performing short-distance runs or hurdle competitions on such uneven track and field runways, the runner must take the posture of crouching start at the start (Japan Federation of Athletics Federation Rules 《Revised March 1989 Correct >> Article 162 and) Therefore, you must put your weight on your fingertips with your finger on the uneven surface. Therefore, when you put on your weight, your fingertips hurt, and that pain hinders your concentration. Because you push the protruding chip 2 with your finger to start up,
At the moment when the finger is released, the lateral movement of the chip 2 causes a loss of power, which causes a pain and a disadvantage such as a negative recording surface, which is desired to be improved.

The present invention has been made in view of such circumstances, and an object thereof is to provide a runway with a good usability that does not cause a pain to a runner starting from a posture of crouching start and does not bring a negative side to a race. To do.

[Means for solving problems]

In order to achieve the above-mentioned purpose, the surface structure of the track of the athletic stadium of this invention has a height difference of 2 mm with unevenness on almost the entire track surface.
Of the belt-shaped area on the front side of the start line with respect to the running direction, which is formed on the above uneven surface, at least the road surface of the part where the hand is held when the runner takes the posture of crouch start has an uneven height of 0.2 to 1.0 mm. The structure is such that it is formed on a minute uneven surface.

[Action]

That is, the present inventors have conducted a series of researches on the surface structure of the runway in the all-weather pavement athletic field so that the runners who do crouching start do not feel uncomfortable at the start. As a result, almost all of the runway has an uneven surface with a height difference of 2 mm or more, and only a predetermined area from the start line to the front side has a height difference of 0.2 to 1.0 mm.
It was found that the fine uneven surface of No. 1 does not cause discomfort at the fingertips at the time of start, and the rise is good, and the present invention was reached.

Next, this invention will be described in detail based on embodiments.

〔Example〕

FIG. 1 shows an embodiment of this invention. That is,
The track of this athletic stadium (1 lap 400m) is paved with all-weather, and the course line 5 and the start line 6 are formed by a known method such as applying white paint (actually, 9 course lines). There are eight courses created by this, but they are omitted in the drawing as four courses). Of the above start lines 6, 6a is the start line for the 400m race, 6b is the start line for the 100m race and the 100m hurdle race, 6c is the start line for the 110m hurdle race, and 6d.
Is the start line for the 200m race and 6e is the start line for the 4x400m relay. In this runway surface, a region P indicated by a chain line is formed by a special minute uneven surface, and the other portions are formed by a chip uneven surface similar to the conventional one.

More specifically, the area P is, as shown in FIG. 2, a belt-like area having a width X = 15 to 17 cm in front of the start line, and at the start of each of the above short-distance races, the runner is in a crouching start posture. It corresponds to the part where you touch your hand.

The cross sections of the minute uneven surface and the chip uneven surface are enlarged and shown in FIG. 3, which is a sectional view taken along the line AA ′ of FIG. In the figure, 10 is a minute uneven surface, and the unevenness of the unevenness is 0.2 to 1.0 mm.
It is set. Further, 20 is a chip uneven surface, and the height difference of the unevenness is set to 3 to 5 mm. The structure of the chip concave-convex surface 20 is similar to that of FIG. 12, and the same parts are denoted by the same reference numerals.

The track can be formed as follows, for example. That is, as shown in FIG. 4, first, a temporary form frame 11 made of wood or the like is placed and fixed on a portion (portion indicated by hatching in FIG. 1) for forming a minute uneven surface, and a normal method is used. Pavement and chip removal topping are performed to form a chip uneven surface 20 on almost the entire runway. Then,
The temporary form 11 is removed (FIG. 5), and a molten resin composition in which fine particles such as sand and a synthetic resin are mixed is poured into the void portion and cured (FIG. 6). In this way, the minute uneven surface 10 can be formed. Alternatively, as shown in FIG. 7, conversely, a fine frame 12 is used to enclose the periphery of the minute concave-convex surface formation planned portion (P region indicated by hatching in FIG. 1) with fine particles. First, the fine uneven surface 10 is formed by pouring and curing a molten resin composition mixed with a synthetic resin. Then remove the formwork 12 (Fig. 8),
On the left and right sides of the above-mentioned minute uneven surface 10, the chip uneven surface 20 is formed by the usual method.
May be formed. In this case, in order to prevent the resin liquid for forming the coating layer 1 and the chip 2 to be sprinkled on the minute uneven surface 10, a protective tape is attached to the upper surface of the minute uneven surface 10, and the left and right chip unevenness is attached. It is preferred that the tape be peeled off after the surface 20 is formed.

Note that the minute uneven surface 10 may be formed by molding the resin composition into a plate having a predetermined size in advance, and pasting the molded product on the site, in addition to the on-site construction by pouring the resin composition.

In these methods, the resin constituting the resin composition may be any resin material conventionally used for pavement of runways, but especially polyurethane, synthetic rubber, asphalt and synthetic A rubber mixture or the like is preferable in terms of the cushioning property of the obtained layer and the adhesiveness to the left and right portions. The fine particles mixed with the resin material include sand having a particle size of about 0.5 to 1.5 mm, and an inorganic substance crushed to the same size. The surface of the mixed composition of the resin material and the fine particles after curing should have unevenness of 0.2 to 1.0 mm due to the protrusion of the fine particles. If the unevenness difference is less than 0.2 mm, the surface is too smooth and the finger is slippery at the start of crouching. Conversely, if the unevenness difference is greater than 1 mm, the finger hurts.

Further, the formation of the minute uneven surface 10, the resin containing no fine particles alone may be poured, and the fine particles may be sprinkled on the surface before curing, or when the on-site construction method is not used. It is also possible to use a resin plate (without containing fine particles) whose surface is previously formed into a minute uneven surface by air lacing, pressing, rough surface grinding or the like. In these cases as well, similar to the above, the unevenness difference of the minute uneven surface 10
It is necessary to be within the range of 0.2 to 1 mm.

In these manufacturing methods, the height of the minute uneven surface 10 is preferably the same as the height of the chip uneven surface 20, but at least the upper surface of the minute uneven surface 10 has the left and right chip uneven surfaces 20. It is preferable that the height is not lower than the upper surface 1a (see FIG. 3) of the constituent coating layer 1. This is because when the height of the minute uneven surface 10 becomes lower than the upper surface 1a of the coating layer 1 of the chip uneven surface 20, this portion becomes a recess in the running path, water and dust are likely to collect, and cleaning becomes difficult.

The runway thus obtained does not hurt the runner's mental concentration even if he / she takes a crouching start posture at the start and puts his / her hand on the runway. Moreover,
Since there is no loss of power when standing up with your fingertips, there is no record disadvantage.

In the above embodiment, the minute uneven surface 10 in the track is formed as a long strip-shaped region that completely crosses the course, including the course line 5, as shown in FIG. For example, when the start line is set to be a curve as shown by 6a, 6d, 6e in FIG. 1, as shown by P'in FIG. It is preferable that only the portion of the area within the course except the width Y = 20 to 40 cm on the left side facing the running direction is the minute uneven surface 10. That is, in a curve, it is preferable to reduce the area of the minute uneven surface 10 as much as possible because the runner is slippery.If the left side of the course is the chip uneven surface 20 in this way,
It can prevent runners from slipping and falling.

However, large-sized runners such as Westerners have wide shoulders and inevitably have a wider range of positions to put their hands on the left and right sides of the course. Therefore, in consideration of the presence of such a runner, it is not preferable that the left side of the course has an uneven surface.

Therefore, depending on the position of the start line 6 and the competition event, whether the formation area of the minute concavo-convex surface 10 is P as shown in FIG. 2 or P'is shown in FIG. It is selected as appropriate in consideration of the circumstances.

In addition, the start line 6d for 200m races and the start line 6e for 4x400m relays are often passed by other runners in other short-distance races, so it is difficult to run because of the existence of the band P. If it is determined that the fine uneven surface 10 is not formed in this portion.

Furthermore, when starting from a curve, such as when starting a 400m race, 4 × 400m relay, or 200m race, the runner should always aim for the point just below the tangent to the curve, as indicated by the dashed arrow in Fig. 11. Since the vehicle runs fast, the position where the hand is held at the start point is likely to be in a state in which the left side is pulled toward you, as indicated by Z in the figure. Therefore, at these start points, the deformed region P ″, which is slightly displaced on the left side, is made to be the minute uneven surface 10 instead of merely making the belt-like area on the front side of the start line 6 the minute uneven surface 10. May be.

[Effect of device]

As described above, according to the present invention, it is possible to provide a good running path in which the fingertips do not hurt even if the user takes a posture of crouching start at the time of start and the hand is held, and the mental concentration of the runner is not disturbed. Moreover, there is no loss of power when standing up on the runway by putting force on the fingertips at the start, and no record disadvantage occurs.

[Brief description of drawings]

1 is a plan view showing an embodiment of the present invention, FIG. 2 is a partially enlarged view thereof, FIG. 3 is an enlarged sectional view taken along the line AA ′ of FIG. 2, FIG. 4, FIG. FIG. 6 is an explanatory view of a construction example of the above embodiment, FIGS. 7, 8, and 9 are explanatory diagrams of other construction examples, and FIG. 10 is a partial view showing another embodiment of the present invention. FIG. 11 is a partial structural view showing still another embodiment of the present invention, and FIG. 12 is a sectional view showing a conventional chip concavo-convex structure. 6 ... Start line, 10 ... Micro uneven surface, 20 ... Chip uneven surface

Claims (1)

[Scope of utility model registration request] 1. A runway surface is almost entirely formed on a bumpy surface having a height difference of 2 mm or more, and at least when a runner takes a crouching start posture in a belt-like region on the front side of the start line with respect to the running direction. The surface structure of the track of an athletic stadium, characterized in that the road surface of the part where the hand is touched is formed as a minute uneven surface with a height difference of 0.2 to 1.0 mm.