JPH0617520Y2 - Double rotary float - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of a double rotary float composed of an inner and outer float bodies.

[Prior Art] In place of the float in which the individual float body is directly inserted into the course rope, there is a double rotary float composed of an inner and outer float bodies (for example, see Japanese Utility Model Publication No. 61-15920).

This prior art is composed of an inner float body having a small-diameter step portion formed on the left and right sides, and an outer float body having a width smaller than that of the inner float body and having an inner surface of the boss fitted to the small-diameter step portion. Due to the free rotation of the body, the double wave canceling action and the effect that it is not necessary to provide a separate intermediary float between adjacent floats are expected.

[Problems to be solved by the invention] By the way, in the above-mentioned conventional technique, the outer float body is integrally formed, which makes it difficult to remove the mold, and in particular, a part of the inner float body is exposed. Therefore, there is a problem that this portion is easily damaged by an external force / impact, which affects buoyancy.

The present invention has been made in view of the above problems of the prior art, and provides a double rotary float that is easy to mold and protects the inner float body.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention adopts the following technical means, that is, in a float composed of an inner and outer float bodies, a rope insertion hole is formed at the center. And a top-shaped inner float body with a plurality of small protrusions formed on the outer surface and a hemispherical concave wall in the center, and a boss protruding from the concave wall, and a wing plate attached between the boss and the rim. An outer float body consisting of left and right halves is provided, and the inner float body is fitted in the hemispherical concave walls of the left and right halves, and the left and right halves are fixed to each other, and the inner and outer float bodies are used as ropes. It is a double-rotating float that is mounted so that it can rotate freely.

[Operation] The entire surface of the inner float body fitted to the outer float body is covered by the outer float body, and since the small protrusions on the outer surface of the inner float body are in point contact with the outer float body, the whole body is inserted into the course rope. The inner float body rotates freely and the outer float body also rotates freely due to the wave motion during swimming.

When the floats are sequentially lined up on the course rope, the outer float body comes into contact with each other at the ends of the left and right bosses, and the contact area of the bosses is extremely small, so that the floats freely rotate freely. In addition, the vanes projecting from the outer float body capture the waves and absorb water and rotate.

[Example] 1 is a hollow-comb-shaped inner float body having a through hole 2 for a course rope R formed in the center thereof, and a plurality of small projections 3 are formed uniformly on the left and right of an outer surface 1a.

Reference numeral 4 denotes an outer float body formed by joining left and right halves 4a and 4b. A boss having a hemispherical concave wall 5 formed at the center of each of the left and right halves and having an inner diameter equal to the insertion hole 2 of the inner float body. 6
Is protruding. Further, the blade 10 is mounted between the boss 6 and the rim 9 and the water passage 8 is formed in the arm 7.

The inner float body 1 is fitted in the hemispherical concave walls 5 of the left and right halves, and the small protrusions 3 are in contact with the inner surface of the concave wall 5.

The left and right halves 4a and 4b form a projection 11 with one end having a large diameter on one arm half and a receiving hole 12 formed on the other arm half to match the projection and engage with each other. As a result, the protrusions 11 and the receiving holes 12 are alternately formed in both halves.

The inner and outer float bodies 1 and 4 are attached to the course rope R so as to be freely rotatable.

[Effects of the Invention] The present invention has the following unique effects.

(1) Since the inner float body is covered by the concave wall and the boss of the outer float body, even if the float comes into contact with the concrete floor, for example, the inner float body is not affected, and therefore the buoyancy is not hindered.

(2) The outer float body is made by joining the left and right halves together, and can be easily fitted to the outside of the inner float body, allowing for efficient mass production without difficulty in molding work, and there is no risk of separation after fixation. Therefore, the inner float body is sufficiently protected and the inner and outer float bodies perform normal rotation for a long time.

(3) Since the small protrusions of the inner float body come into point contact with the inner surface of the outer float body, the inner and outer float bodies have less contact resistance and rotate smoothly. There is no risk of damage to the float as it rotates.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a front view in which an upper half is longitudinally cut, FIG. 2 is a side view, FIG. 3 is a vertical sectional view of an outer float half, and FIG. The front view of the inner float body which cut | disconnected the right half part longitudinally, FIG. 5 is a front view of the state which inserted the float of this invention in the course rope. 1 ... Inner float body, 1a ... Outer surface 3 ... Small protrusion, 4 ... Outer float body 4a, 4b ... Half body, 5 ... Hemispherical concave wall 6 ... Boss, 7 ... Arm 9 ... Rim, 10 ... wing plate

Claims (1)

[Scope of utility model registration request] 1. A float consisting of an inner and outer float body, which comprises a rope-shaped inner float body having a rope insertion hole formed at the center and a plurality of small protrusions formed on the outer surface, and a hemispherical concave wall at the center. Providing a boss on the wall and providing an outer float body consisting of left and right halves with wings attached between the boss and the rim, fitting the inner float body into the hemispherical concave walls of the left and right halves, The left and right halves are fixed to each other, and the inner and outer float bodies are attached to the rope so as to be freely rotatable.