KR101738265B1 - baseball - Google Patents

Abstract

The present invention discloses a practice baseball ball. The present invention constitutes an inner core material composed of a cork core, a rubber coating layer and a seal layer in the same manner as a baseball game for competition, and is configured to coat a protective film on the surface of the inner core material Thereby preventing moisture from entering the inner core from the outside, thereby preventing the baseball ball from significantly changing its weight depending on the external environmental conditions, preventing the difficulty in conditioning due to pitching, The protective film of the contaminated baseball ball can be easily cleaned with a detergent or the like so as to be reused as a new ball, and even when it is used for a training game or training, it can be provided with the same effect as a real batting ball.

Description

Practice baseball {baseball}

More particularly, the present invention relates to a baseball ball, and more particularly, to an inner core composed of a cork core, a rubber coating layer, and a seal layer in the same manner as a baseball ball for a game, And to prevent an inflow to the inner core.

In general, the baseball ball used in the game has a circumference of 22.9 to 23.5 cm, a weight of 141.7 to 148.8 g, and a repulsive force of 1.39 to 1.44 m / 4 m (dropping the baseball on a marble plate at a height of 4 meters, Meters), and the seam is made of 108 knots.

1 and 2, the baseball ball for competition is composed of two pieces of 8 pieces on the surface of the inner core member 100 composed of the cork core 101, the rubber coating layer 102 and the seal layer 103. That is, The leather covering layer 200 is covered and the connecting portion of the leather covering layer 200 composed of two pieces is stitched to the seamed polyester seam 300 so that the stitched portion of the polyester seam 300 The protruding strip 400 having a certain height is formed on the connecting portion while being fastened.

In this case, the protruding strips 400 are used to make resistance to air, and the polyester seals 300, which connect the connecting portions of the leather outer cover layer 200, serve as another resistance element, You can do it.

The yarn layer 103 is formed by closely winding yarn and nylon on the rubber covering layer 102 surrounding the cork core 101. The main yarn layer 103 is made of coarse yarn, Since the wool yarn and the cotton yarn are further wound, the stability of the sphere constituting the inner core member 100 is maintained.

At this time, the thick cotton yarn and the thin cotton yarn are selectively wound as the filament yarn wound on the yarn, and accurate weight and size are required for each step.

In the case of Korea, there are two kinds of yarns (yarn yarn + filing yarn), while Japan uses three yarns in a complex way And in the case of the United States, there is a difference in that they use a single thread to produce official games.

However, in the conventional baseball game, the surface is connected to the two leather outer layers 200 irrespective of the difference in the lamination structure of the actual layers, Since the yarn layer 103 which is a coating layer of the cork core 101 constituting the cork core 101 is composed of the yarn and the filamentless yarn, when the inflow of moisture occurs, the yarn and the filament yarn absorb a large amount of the inflowing moisture, He had a problem that the weight varied greatly depending on the conditions. As a result, he was greatly influenced by the pitch and speed when pitching, so he often had difficulty in controlling the condition by pitching.

Further, since the conventional baseball ball has a problem that the leather outer cover layer 200 is easily damaged by an external impact, it can not be repeatedly used in a continuous game. Even if the ball is used as an exercise ball, the surface is easily contaminated, It was not possible to wash sufficiently and had an unsanitary problem.

Meanwhile, a conventional practice baseball ball uses a rubber ball of the same or similar weight as that of a baseball ball for competition, as shown in Patent Registration No. 10-0956546 (Announcement 2010.05.07). Such a rubber ball has a large elastic repulsive force and irregular weight And had a problem of reducing adaptability.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an inner core member comprising a cork core, a rubber coating layer and a seal layer, , Which prevents the moisture from entering the inner core from the outside, thereby improving the problem that the weight of the baseball ball is greatly changed according to the external environmental conditions and preventing the difficulty of the condition control due to the pitching. There is a main purpose in providing the ball.

Another object of the present invention is to provide a method of recovering a contaminated baseball ball which can be easily reused such as a new ball by washing with a detergent or the like, To provide a baseball ball for practice.

In order to achieve the above object, the present invention provides a baseball ball for practice, which comprises an inner core made of a cork core, a rubber coating layer and a thread layer, wherein the thread layer densely winds thick yarn on the rubber covering layer surrounding the cork core, Wherein the inner core material is coated with a single protective film having a predetermined thickness to coat the surface of the inner core material with a coating material on the surface of the protective film, A plurality of circumferential strips are formed on the circumferential strip so as to repetitively form a narrow groove having a narrow width at a predetermined interval to increase the grip feeling in the groove groove, To show the feel of the men's silk, .

According to one aspect of the present invention, the protective film is a urethane coating layer.

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As described above, the present invention constitutes an inner core composed of a cork core, a rubber coating layer and a seal layer in the same manner as a baseball ball for competition, and is constructed so that a protective film is coated on the surface of the inner core, Thereby preventing the difficulty in controlling the condition due to the pitching while preventing the baseball ball from significantly changing in weight depending on the external environmental conditions and preventing the contamination of the baseball ball from being used during the game It can be easily reused as a new ball by washing with a detergent or the like, and it can be expected to have the same effect as a real throwing helmet even when it is used for training or training.

1 is a structural view of a conventional baseball.
2 is a front view showing a part of a cross-section of the conventional art 1;
3 is a perspective view showing a structure of a baseball ball in which a protective film is formed according to an embodiment of the present invention.
FIG. 4 is a front view showing the structure of a baseball having a protective film formed thereon according to an embodiment of the present invention. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 3 is a perspective view showing a structure of a baseball with a protective film formed thereon according to an embodiment of the present invention, and FIG. 4 is a front view showing a structure of a baseball with a protective film formed according to an embodiment of the present invention.

3 and 4, a training baseball ball according to an embodiment of the present invention includes an inner core 100, a protective film 20, a peripheral band 30, a nodule groove 40, 50).

2, the inner core 100 is composed of a cork core 101, a rubber coating layer 102, and a yarn layer 103 made of a yarn and a silken yarn, as shown in FIG. .

The protective film 20 is coated on the surface of the inner core member 100 to have a predetermined thickness and is coated to prevent moisture from entering the inner core member 100 from the outside, Urethane coating layer.

The protective film 20 is a coating layer surrounding the inner core member 100, and is preferably coated with a uniform thickness while maintaining a thickness of 1.2 to 1.5 mm.

The circumferential strips 30 are continuously protruded in two lines separated from the surface of the protective film 20 by a boundary line L1 so as to be able to form a pitch during pitching.

The nodal groove portions 40 are repeatedly formed with a narrow width while maintaining a constant spacing in the peripheral strips 30.

The nodal filler 50 is made of polyester resin filled in the nodal groove 40 so as to increase the grip feeling on the practice baseball and to show the feel of the leather sewing thread formed on the baseball will be.

3 and 4, a rubber coating layer 102 is first formed on a cork core 101 and a yarn is wound thereon to form a seal layer 103. In this embodiment, Thereby forming an inner core member 100 having the same weight as that of the competitive baseball ball.

Next, the protective film 20, which is a urethane coating layer, is uniformly coated and coated on the surface of the inner core member 100 to a predetermined thickness. When the protective film 20 is coated and coated, the surface of the protective film 20 The circumferential strip 30 is repeatedly formed with the nodal groove portion 40 having a narrow width while maintaining a constant interval.

Next, when the nodal groove portion 40 is filled with the rod-shaped filling material 50 made of polyester resin, the same practice as that of the baseball ball for the practice of the present invention is completed.

That is, the protective film 20 made of a urethane coating layer can block the inflow of moisture into the inner core 100. The circumferential band 30 enables a ball to be used for a ball for a game, (50), which increases the grip of the practice baseball ball as well as the game baseball ball, and reproduces the feeling of the leather sewing room of the baseball ball for the game, and accordingly, the practice of pitch training through the baseball ball It is possible to expect the same effect as the actual performance.

In addition, even if the surface of the protective film 20 is contaminated from the pitching practice, the surface of the protective film 20 can be easily cleaned with detergent or the like, so that the practitioner can reuse the practice baseball ball in a clean state.

While the present invention has been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It is to be understood that such changes and modifications are within the scope of the claims.

20; A protective film 30; Girth
40; A nodal groove 50; Node filling
100; Inner core 101; Cork core
102; A rubber covering layer 103; Layer
L1; Boundary line

Claims (3)

And an inner core made of a cork core, a rubber coating layer and a thread layer, wherein the thread layer densely winds a thick yarn on the rubber covering layer surrounding the cork core, further winding thin yarn and nylon therein, The core material is configured to maintain the stability of the sphere,
The surface of the inner core is coated with a single protective film having a predetermined thickness,
In the surface of the protective film, a pair of circumferential stripes separated by boundary lines are successively protruded to define a breaking hole,
The circumferential bands are repeatedly formed with a narrow groove portion having a narrow width at regular intervals,
Characterized in that the nodal groove portion is formed by applying a nodal filler made of a polyester resin so as to increase the grip feeling and to show the feeling of the leather sewing thread. The method according to claim 1,
Wherein the protective film is a urethane coating layer. delete

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