JP2866880B2 - Pool course rope float - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a float for a course rope of a pool, which forms a course in the pool,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a float for a course rope of a pool, which reduces ripples and the like to an adjacent course and enables stable swimming.

[0002]

2. Description of the Related Art In a swimming pool, a course rope stretched over the surface of the water does not merely divide the course,
It is an object of the present invention to suppress a wave generated by a swimmer so that a wave generated by a swimmer does not extend over a course rope to an adjacent course or from the adjacent course to the own course.

[0003] For example, it is known that a wave generated by a preceding swimmer and an oncoming swimmer during a swimming race has a considerable adverse effect on swimmers on an adjacent course. In particular, 1/1
In a race competing for 00 seconds, it is conceivable that the time differs depending on the wave-dissipating properties (wave attenuation effect) of the course rope. Therefore, it is strongly desired that waves generated by the preceding swimmer and the oncoming swimmer be attenuated as much as possible by the course rope.

[0004] Thus, various floats to be attached to a course rope have been proposed, and Japanese Utility Model Publication No. 63-38000, Japanese Utility Model Publication 61-15920, and Japanese Utility Model Publication No. 5-63.
No. 600 is known. In Japanese Utility Model Publication No. 63-38000, the width of the fins (blades) of the float is made longer than the width of the outer cylinder, and the waves are efficiently received, thereby effectively attenuating the waves by the rotating action of the float. Like that.

Japanese Utility Model Publication No. Sho 61-15920 and Japanese Utility Model Laid-Open Publication No. Hei 5-63600 disclose a double-rotation type wave-absorbing float, which is composed of an inner float body and an outer float body. The damping effect is enhanced by independently rotating the inner and outer floats.

[0006]

However, any of the above-mentioned conventional ropes for course ropes increases the wave damping effect by rotating the float.
Since each float attached to the course rope is configured to rotate independently, a gap is generated between the floats. With such a gap, there is a problem that the wave passes through the course rope and flows out to the adjacent course, and the above-mentioned adverse effect is caused.

Particularly, in Japanese Utility Model Publication No. Sho 63-38000, a plurality of blades provided radially between an inner cylinder and an outer cylinder of a float are made shorter in width on the tip side than on the base side. As a result, the gap between the floats is further increased, so that the damping effect is disadvantageously reduced.

In view of this point, it is conceivable to increase the width of the float itself in order to reduce the gap.
When the width of the float is large, there arises a problem that it is difficult to wind the course rope around the drum when storing the course rope.
For this reason, attempts have been made to reduce the gap between the floats or to provide a structure in which there is almost no gap. However, if the gap is narrowed, the float blades may be wound together when wound on the storage drum. There is a problem that the edges and the like of the outer cylinder are broken due to the collision, and it has been considerably difficult to increase the above-described wave-absorbing property while securing the storing property on the other hand.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a course rope float capable of increasing the damping efficiency of wave motion, enabling stable swimming, and facilitating storage in a storage drum. It is intended to be.

[0010]

In order to achieve the above object, according to the present invention, a plurality of blades are formed radially from an inner cylinder having a course rope insertion hole to an outer cylinder. In a float for a rope provided with a plate, a wave receiving portion is provided by directing each of the wing plates from one end of the outer tube in a direction substantially equal to the width of the outer tube, and a wave receiving portion is provided. the radially outward direction at the side length Te small cities than the inner diameter of the other end portion of the outer cylinder, one outside of the float and the adjacent connecting
Make sure that the tip of the wave receiving part of the other float enters the cylinder
It is characterized in the thing.

According to a second aspect of the present invention, there is provided a float for a course rope, comprising a plurality of blades formed radially from an inner cylinder having a course rope insertion hole to an outer cylinder side. Each wing plate is axially extended from one end of the outer cylinder to provide a wave receiving portion, and the length in the radial direction on the tip side of the facing wave receiving portion is smaller than the inner diameter of the other end of the outer cylinder. age
When connected, the other float is placed in one outer cylinder of the adjacent float
So that the tip of the wave receiving part of the float
In addition, a large number of through holes are formed in the peripheral surface of the outer cylinder.

[0012]

According to the first aspect of the present invention, when a large number of floats are connected to a course rope and mounted , a wave constituting a rear-side float blade plate is provided in a front-side float outer cylinder. The state is such that the distal end side of the receiving portion enters. At this time, a certain gap is formed between the rear end portion of the outer cylinder and the blade plate, but the outer shape has almost no gap between the floats. For this reason, it is possible to receive the waves generated during swimming in the entire course rope, and the waves flowing out to the adjacent course are greatly reduced. Further, in the connected state of the float, most of the wave receiving portions extending by almost half the length of the outer cylinder between the adjacent outer cylinders are exposed. Therefore, it becomes easy to catch the wave motion in the wave receiving portion of the blade plate, and the rotation of the float is promoted. In addition, when the float is connected, the front end side of the wave receiving portion constituting the wing plate of the rear float is covered by the outer cylinder of the front float, and a swimmer or the like may come into contact with a corner of the wing plate from the outside. Disappears.
Also, when winding the course rope around the storage drum, when the floats have a predetermined inclination angle determined by the radius of the drum, the other floats are placed in one outer cylinder of the adjacent float.
Since the front end side of the wave receiving portion of the float enters, a small gap is maintained between the rear end of each outer cylinder and the front end of the blade even if the float is inclined.

According to the second aspect of the present invention, since a large number of through holes are formed in the peripheral surface of the outer cylinder, when the float receives a wave, it is guided into the outer cylinder via the through holes. . For this reason, the waves colliding with the outer cylinder are absorbed, and the waves penetrating into the outer cylinder are received by the concealing portion of the blade, and the rotation of the float is further promoted in combination with the exposed wave receiving portion.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a float for a course rope of a pool according to the present embodiment, and FIG. 2 is a perspective view showing a rear side of the float.

The float 1 for a course rope is formed by integrally forming an outer cylinder 2, an inner cylinder 3, a wing plate 4, reinforcing plates 5, 6 and the like. By connecting, it is configured to be stretched on the water surface of the pool.

The outer tube 2 is cylindrical, annular body reinforcing plate 5 is provided on the front end portion 2a side, the inner cylinder 3, a plurality of vanes
With 4 and vane reinforcing plate 6 is made of a synthetic resin material of foamed polyethylene.

The inner tube 3 is an elongated shaft tube,
As shown in the figure, a wire insertion hole 3a is formed in the center, so that a course rope 10 (see FIG. 5) made of a wire is inserted. This inner cylinder 3 is, as shown in FIG.
The rear end portion 3c is an abutment portion for bringing another float 1 into contact, and the blade plate reinforcing plate 6 is integrally formed with the front end portion 3b.

As shown in FIGS . 4 and 5, when the overall length L1 of the float 1 is 11.5 cm, the length L2 of the outer cylinder 2 is 5 cm, and the outer cylinder 2 is The length L3 is 6.5 cm. The ratio between the length L8 of the blade 4 between the outer cylinders 2 and the length L2 on the outer cylinder 2 side is 1: 1. The diameter φ1 of the outer cylinder 2 is 15 cm.
It has become.

The wing plate reinforcing plate 6 has a disk shape and is connected to the front end 3b of the inner cylinder 3 to reinforce a wing plate 4 described later. The wing plate reinforcing plate 6 is provided with eight water holes a at equal intervals so as to reduce the weight of the float 1 and to guide waves from oblique directions to the wing plate 4 side. ing.

The wing plate 4 is a fin and includes a wave receiving portion 7 and a concealing portion 8. In this example, eight blades are radially provided from the inner cylinder 3 toward the outer cylinder 2. The wave receiving portion 7 is a wave receiving portion exposed to the front side of the outer cylinder 2, and
From the front end 2a of the inner cylinder 3 in the axial direction, and is connected to the blade plate reinforcing plate 6.

The above-mentioned step portion 4a is formed at the outer end edge of each wave receiving portion 7, and by providing this step portion 4a, the radially outward length at the distal end side 7a of the opposed wave receiving portion 7 is formed. The length L6 (FIG. 4) (on the line passing through the center axis of the inner cylinder 3) is smaller than the inner diameter φ2 of the other end 2b of the outer cylinder 2. The steps 4a and the corners of the distal end 7a are rounded.

The concealing portion 8 of the wing plate 4 is a continuous portion of the wave receiving portion 7 which is hidden in the outer cylinder 2 and is not exposed, and the concealing portion 8 is also capable of receiving waves entering from an oblique direction. Has become. The concealing portion 8 is provided at the rear end 2 b of the outer cylinder 2.
A concave notch 9 is formed at the edge between the inner cylinder 3 and the abutting portion 3c, and the notch 9 is
When they are connected to each other, they become accommodating portions for the wing plate reinforcing plate 6.

The notch 9 has a width W1 from the bottom surface 9a to the rear end 2b of the outer cylinder 2, a width W2 from the abutting portion c to the rear end 2b, and a width W2 from the abutting portion 3c to the bottom surface 9a. Is set to W3. The distance L7 between the outer peripheral portions 9b, 9b of the bottom surface 9a in each cutout 9 is set to be larger than the diameter φ3 of the blade plate reinforcing plate 6.

As a result, when a plurality of floats 1 are connected to the course rope, as shown in FIG. 5, the float 1B on the rear side is placed in the outer cylinder 2 of the float 1A on the front side.
The blade plate reinforcing plate 6 enters a state where the rear end edge of the outer cylinder 2 and the front edge of the blade plate 4 maintain a constant gap G, but the respective blade plates 4 are located between the adjacent outer cylinders 2. Most of the wave receiving portion 7 can be exposed.

For this reason, the appearance of the float 1 is such that there is almost no gap between the floats 1, and the waves generated during the swimming can be received by the entire course rope, and the waves flowing to the adjacent course can be greatly reduced. it can. In addition, since the wave is easily received by the wave receiving portion 7 of the blade plate 4 exposed to the outside, the rotation efficiency of the float 1 is increased by the wave, and the attenuation rate of the wave is remarkably improved as in the experimental results described later. I do.

Further, the outer cylinder 2 of the front float 1A covers the front end edges of the wing plate reinforcing plate 6 and the wing plate 4 of the rear float 1B and has an external shape that cannot be touched from the outside. The problem of injury occurring is avoided.

Further, as shown in FIG. 6, when the course ropes 10 are wound around the storage drum 11 and the floats 1 have a predetermined inclination angle determined by the radius of the drum 11, the wave receiving portion Length in the radial direction in the tip example 7a of No. 7
Since L6 has a size smaller than the inner diameter φ2 of the rear end portion 2b of the outer cylinder 2 and has the notch 9 in the concealing portion 8,
In the state where the front end side 7a enters the notch 9, a small gap is secured between them, or the corner of the front end side 7a and the edge of the blade plate reinforcing plate 6 are formed on the inner peripheral wall of the rear end 2b. Make sliding contact. Therefore, the blade 4 of 1B is the outer cylinder 2 of the float 1A.
Also, such a problem that these parts are broken by contact with the concealing portion 8 is prevented.

By the way, in the above embodiment, the outer cylinder 2
Although the length L2 of the outer cylinder 2 and the length L8 of the blade 4 between the outer cylinders 2 and 2 are substantially the same, as shown in FIG. Larger than the length L3 of the outer cylinder 2
When a large number of through-holes 12a are formed in the peripheral surface, the attenuation rate of wave motion can be further increased.

The through-holes 12a have a diameter φ of about 5 mm so that a fingertip of a person does not enter, and is formed in a range of several tens to several hundreds on the peripheral surface. Specifically, as shown in the graph of FIG. 8, the outer cylinder 2 with respect to the total area of the through holes 12a is formed.
Through hole 12a so that the surface area ratio of the
It is possible to increase the attenuation factor from 60% or less to nearly 70% without through-holes. In this example, the through-hole 12a formed in the range of 2 to 13% is used as a test sample.

Next, a description will be given of an experiment and a comparison result of the float for a course rope. In this experiment, the course rope to which the float 1 of the present invention was connected and the course rope to which the float of the comparative example were connected were respectively stretched over the pool, and the wave height generator and the wave generator were set under the same conditions. It uses a method that allows for accurate measurements close to swimming.

At the time of this measurement, the pool P shown in FIG.
The first course rope R1 is stretched at a distance W4 of 0.5 m from the poolside S of
The second and third course ropes R2, R3 are stretched at intervals W5, W6 of the first course C1 and the second course C.
2 is formed. Then, in order to ensure accurate measurement, the swimmer M actually swims in advance and generates waves, and the wave generator B generates waves based on the measurement results obtained by the wave height meters K1 and K2 and the data recorder D to generate a plurality of waves. Of each embodiment and the conventional example are obtained.

The wave gauges K1 and K2 are conventionally well-known wave measuring devices, and the wave generating device D is a device that generates the same waves as when the swimmer M actually swims. First, in an experiment in which the swimmer M actually swims, the distance W7 from the second course rope R2 is set to 30 cm, and the second wave gauge K2 is arranged on the first course C1 side. Then, on a straight line having an inclination angle of 45 degrees from the first crest meter K1, a second course C2 having an interval W8 of 25 cm from the second course rope R2.
The first crest meter K1 is arranged on the side. The data recorder D for recording is set on the pool side S.

On the other hand, in the experiment using the wave generator B, as shown in FIG. 10, the distances W9 and W10 between the first course C1 and the second course C2 were set to 15 cm with respect to the float on the second course rope R2. And a first crest meter K1 and a second crest meter K2 are arranged. Then, the wave generator B is set on the first course rope R1 side so that a constant wave can be sent from the first crest gauge K1 to the float and the second crest gauge K2.

Thereafter, an experiment is performed on a large number of test samples in the order described above, and the respective attenuation rates of the embodiment and the conventional example are calculated from the respective values measured by the crest meters K1 and K2 by the following equations. Attenuation rate (%) = (measured value of first crest meter−measured value of second crest meter) / measured value of first crest meter × 100

The attenuation rate obtained in this manner indicates the wave-absorbing property of the wave caused by the float, and the attenuation rate (wave-absorbing property) and the storage capacity differ depending on the shape of the test sample and the presence or absence of the through hole 12a. It is shown in Table 1.

[Table 1]

Here, the test samples of the coarse rope float used in the experiments were 14 types, the examples of the present invention were 7 types of test samples A to G, and the comparative examples were 7 types of test samples H to N. Is a seed. These comparative examples include Comparative Example 1 (test sample H) having no float and only the course rope, and Comparative Examples 2 to 9 (test samples I to P) which are conventional products.

In the evaluation of the storability shown in Table 1, it is difficult to wind the sheet into the storage drum 11,
If the float is apt to be damaged, etc., the mark is x, and if the float is not damaged, etc., but it is difficult to wind it up on the storage drum 11, it is easy to mark, and it is easy to wind it up on the storage drum 11 Those with no problems such as breakage of the float are indicated by ◎.

As apparent from this table, the float 1 of the present embodiment has a significantly improved attenuation factor (wave-dissipating property) as compared with the conventional example, and hardly causes any problem in storage. The result was obtained. That is, Example 1 (test sample A) is a float in which the outer cylinder width and the fin (wing plate) width are the same and the through-hole is not formed in the outer cylinder, but the attenuation rate is 72.7%. The storage is also ◎.

In the second embodiment and the following, it is a matter of course that there is no problem in the storability, but the ratio between the outer cylinder width and the fin width is changed as compared with the first embodiment (test sample A). In Example 2 (Test Sample B) and Examples 3 to 5 (Test Samples C to E) in which only a small through-hole was formed in the outer cylinder, the attenuation rate slightly decreased. However, when a large number of through holes are formed as in Examples 6 and 7 (test samples F and G) (see FIG. 7), the decay rate becomes the same level as in Example 1, so the width of the fin is reduced. In this case, it is desirable to provide a through hole in the outer cylinder.

As described above, it is apparent that each of the embodiments of the present invention is superior in the attenuation rate and the storability as compared with any of the conventional examples. That is, in the attenuation rate, as the diameter of the outer cylinder increases, the efficiency increases due to an increase in the area receiving the wave. If the width of the fins is increased instead of increasing the width of the outer cylinder, and the number of fins is increased, it becomes easier to receive the waves, so that the rotational efficiency of the float is promoted and the damping rate is improved. Furthermore, the attenuation rate can be improved by forming a certain number or more of through holes in the peripheral surface of the outer cylinder.

Regarding the storability, for example, in the case of a float in which the shaft width of the outer cylinder is increased as in the conventional product, the interval between the floats is further increased when the float is wound on the storage drum. Considering the point, the wire passing through the float needs to be long. However, since the wire is generally determined to have a predetermined length, there is a problem that the wire becomes insufficient at the end of winding. Next, in the case where the distance between the floats is increased by projecting the inner cylinder from both ends of the outer cylinder, the distance between the floats becomes wider when the course rope is stretched, so that the waves spread over the adjacent course and attenuate The rate will drop significantly.

Next, when the shaft width of the outer cylinder is reduced, contrary to the above, the winding on the storage drum becomes easy,
In the state where the course rope is stretched, the intervals between the floats are increased in number, so that many waves reach the adjacent course from these intervals and the attenuation rate is reduced.

If the blades that catch the waves are floats exposed from both ends of the outer cylinder in order to increase the damping rate, the interval between the blades becomes narrower. If the spacing between the plates becomes extremely small, the edges of the blades will be damaged or bent, causing the problems that were encountered.

On the other hand, when the float of the present embodiment is wound on the storage drum as described above, the leading end of the wing plate enters the rear end of the outer cylinder gently. Therefore, the breakage and bending of each part can be prevented, so that it is possible to achieve both good winding and storing property on the drum and improvement of the damping rate of the wave. The float according to the present embodiment has a configuration conforming to the standard prescribed by the Japanese Swimming Federation, and can be suitably used in a swimming course.

As described above, according to the first aspect of the present invention, even when a large number of floats are connected to the course rope, almost no gap is formed between the floats, and furthermore, between the adjacent outer cylinders . Since most of the wave receiving part of each blade can be exposed, it is possible to significantly reduce the wave generated during swimming from crossing the course rope to the next course, and Since the wave is easily received by the part, the rotation efficiency of the float is increased by the wave motion, and the attenuation rate (wave-dissipating property) is remarkably improved. Therefore, both the ripples on the adjacent course and the ripples on the own course where the waves hitting the course rope are rebounded and returned, are greatly reduced, and swim under stable conditions. It has the effect that can be done. In a state where the float is connected, the tip end of the wave receiving portion constituting the rear side wing plate of the float by a front side float barrel of is covered by touching the corner portion or the like of the vane from outside damage Is also prevented. Further, when a predetermined inclination angle occurs between the floats when the course rope is wound on the storage drum, the adjacent floats may be used.
The tip side of the wave receiving part of the other float in one outer cylinder of the other float
So that even if the float is tilted, a small gap is maintained between the rear end of each outer cylinder and the wave receiving part that is the tip side of the blade,
There is also an effect that breakage and bending due to these contacts are prevented.

According to the second aspect of the present invention, since a large number of through holes are formed in the outer peripheral surface of the outer cylinder, not only can the collision of waves be absorbed, but also waves penetrating into the outer cylinder can be prevented. Since the float is received by the concealing portion of the plate and the rotation of the float is further promoted in combination with the exposure of the wave receiving portion, there is an effect of further improving the attenuation rate.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a course rope float according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a rear side of the course rope float.

FIG. 3 is a front view showing a front side of the float for the course rope.

FIG. 4 is a side view showing a cross section of the lower half along the line IV-IV in FIG. 3;

FIG. 5 is a vertical sectional side view of a float connected to a course rope.

FIG. 6 is an explanatory view showing a state in which a course rope is wound around a storage drum.

FIG. 7 is a side view showing another embodiment of the course rope float.

FIG. 8 is a graph showing a damping rate of a float having a through hole formed in an outer cylinder.

FIG. 9 is a schematic configuration diagram of a pool illustrating an experiment by a swimmer.

FIG. 10 is a schematic configuration diagram of a pool for explaining an experiment using a wave generator.

[Explanation of symbols]

 Reference Signs List 1 float 2 outer cylinder 2a one end 2b other end 3 inner cylinder 3a insertion hole 4 blade 7 wave receiver 7a tip side

Continued on the front page (72) Inventor Katsuhiro Imazato 7-1-1, Minatojima-Nakamachi, Chuo-ku, Kobe ASICS Co., Ltd. (56) References JP-A-61-288885 (JP, A) JP, U) Jikken 49-44733 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) A63K 3/00 A63B 69/12

Claims (2)

(57) [Claims] 1. A float for a pool having a plurality of blades formed radially from an inner cylinder having an insertion hole for a course rope to an outer cylinder, wherein each of the blades is connected to one end of an outer cylinder. A wave receiving portion is provided extending from the portion in the axial direction by a length substantially equal to the width of the outer cylinder, and the length in the radial direction on the distal end side of the facing wave receiving portion is determined from the inner diameter of the other end of the outer cylinder also Te small city, one of the float and the adjacent connecting
The tip of the wave receiving part of the other float enters the outer cylinder of
A float for a course rope of a pool, characterized in that: 2. In a float for a course rope comprising a plurality of blades formed radially from an inner cylinder having an insertion hole for a course rope to an outer cylinder side, each of the blades is moved from one end of the outer cylinder. a wave receiving part provided to extend in the axial direction, the length of the radially outward direction at the tip end of the opposite wave receiving Te small cities than the inner diameter of the other end portion of the outer cylinder, the float adjacent to the connecting
The tip side of the wave receiving part of the other float enters one outer cylinder
Crowded way, course rope float pool, characterized by further forming a plurality of through holes on a peripheral surface of the outer cylinder.