JPH0425150Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a top weight block for a bowling ball that is buried in order to balance a bowling ball with finger holes and to provide rotational force to the ball. .

Conventional Technology There are two types of bowling balls: those made of synthetic rubber (hereinafter referred to as "rubber") and those made of resin (hereinafter referred to as "polyester").These bowling balls are manufactured according to regulations. There is.

The bowling ball consists of a spherical medium core located at the center, a spherical outer shell covering the core, and a top weight block embedded within the bowling ball.

Conventionally, the shape and buried position of this top weight block are shown in FIGS. 3 to 6.

Rubber balls are made by using a molding machine (formwork) to create a hemispherical outer shell with a hollowed out center to accommodate the central core, and the upper and lower parts are separated by a molding machine. It was manufactured by inserting a medium core made of a piece of cork and a piece of synthetic rubber or a center core made by compressing and solidifying a foamed polystyrene material, and then processing it by high heat treatment.

On the other hand, polyester balls are made by inserting a central core made of compressed polyester powder into the center of a spherical mold frame that can be divided into upper and lower halves, and injecting polyester liquid material through the injection port of the lower mold. The injection port was then closed by injecting a slightly hard polyester material, followed by high heat treatment.

Recently, urethane balls have come to be manufactured using the same manufacturing method as polyester balls.

Problems that the invention aims to solve The top weight block for bowling balls not only balances the ball, but also has the effect of generating rotational force for the ball.

To increase this effect, increase the weight of the top weight block. ) and the bottom (opposite the finger hole) within 85.05 grams (3 ounces), and for balls less than 4.536 kilograms (10 pounds), the difference between the head and the bottom of the ball is 21.262 (3/4 ounces) Therefore, there is a limit to how heavy the top weight block can be, and the rotational force generated by the conventional top weight block was not very strong.

Means for Solving the Problems The present invention was developed in view of the above circumstances, and is a top weight block for bowling balls that generates as much rotational force as possible within a limited weight.

To explain the top weight block for a bowling ball according to the present invention, its structure includes a protrusion 1 whose upper surface 1A is exposed to the surface of the bowling ball and whose upper surface is formed into the same curved surface as the surface of the bowling ball, and the protrusion It consists of a support part 2 that projects laterally from the lower part of the support part 2.

Effect Next, the operation of the present invention will be explained.

If the weight of the top weight block is the same, the closer the top weight block is to the surface of the bowling ball, the more the rotational force generated by the top weight block increases and the speed can be maintained.

The top weight block for a bowling ball according to the present invention consists of a protruding part 1 and a support part 2 projecting from the lower part of the protruding part 1, and the upper surface 1A of the protruding part 1 is exposed on the surface of the bowling ball. Therefore, since the protruding portion 1 is located on the ball surface and the support portion 2 is also located extremely close to the bowling ball surface, the rotational force generated by the top weight block for a bowling ball according to the present invention is smaller than that of the conventional one. The acceleration is maintained, the rotational force is increased, and the maximum effect is obtained when the pin hits the pin.

Further, in the top weight block for a bowling ball according to the present invention, the support part 2 protrudes laterally from the lower part of the protrusion part 1, and since the support part 2 is completely buried in the ball, the protrusion part 1 Even if an impact, centrifugal force, etc. are applied to the protruding part 1, the supporting part 2 serves as a support and the protruding part 1 will not be damaged or fall off.

Embodiment The present invention will be explained in more detail based on an embodiment shown in the drawings.

The drawings show an embodiment of the present invention.
The figure is a front view showing the structure of the present invention, FIG. 2 is a plan view thereof, and FIGS. 3 to 6 are schematic diagrams showing the shape and buried position of a conventional top weight block for a bowling ball.

1 in the figure is a protrusion. The upper surface 1 of this protrusion 1
A is exposed on the surface of the bowling ball 3, and the upper surface 1A is formed to have the same curved surface as the surface of the bowling ball 3. The shape of the protrusion 1 is suitably disc-shaped. The protrusion 1 of this embodiment is a disk with a diameter of 30 mm and a thickness of 3 mm.

Reference numeral 2 denotes a support portion, which extends laterally from the lower part of the protruding portion 1. A suitable shape for the support portion 2 is a disk shape. The support part 2 of this embodiment has a disc shape with a diameter of 60 mm and a thickness of 20 mm.
The lower surface 2B is formed parallel to the surface of the bowling ball 3.

It should be noted that urethane having a high density is suitable as the material for the protruding part 1 and the supporting part 2, and it is preferable that these are integrally molded.

In addition, the bowling ball 3 shown in FIGS. 1 and 2 uses a polyester core 4 as the middle ball core 4, and this polyester core 4 and top weight block are covered with an outer shell made of 100% urethane and having a thickness of 43 mm. .

Effects of the invention The present invention having the above configuration has the following effects.

In the top weight block for a bowling ball according to the present invention, the protrusion 1 is located on the ball surface, and the support portion 2 is also located extremely close to the ball surface, so that the longest distance from the rotation axis 5 (center of the core) to the surface is By doing so, acceleration was added and rotational force became powerful.

Further, the bowling ball using the top weight block according to the present invention has acceleration in rotational force and good bite in front of the pin, so that the pin action effect can be maximized.

Furthermore, the top weight block for a bowling ball according to the present invention has a support part 2 at the lower part of the protrusion part 1.
Therefore, even if an impact or centrifugal force is applied to the protrusion 1, there is no fear that the protrusion 1 will be damaged or fall off, making it extremely strong and safe.

As described above, the present invention is a top weight block for a bowling ball that makes it possible to maximize the rotational force of the bowling ball.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a front view showing the structure of the present invention, Fig. 2 is a plan view thereof, and Figs. 3 to 6 show a conventional top weight for a bowling ball. FIG. 2 is a schematic diagram showing the shape and buried position of a block. 1...Protrusion part, 1A...Top surface, 2...Support part,
2A...Top surface, 2B...Bottom surface, 3...Bowling ball, 4...Medium ball core, 5...Rotating shaft.

Claims (1)

[Scope of utility model registration request] A top weight block for a bowling ball consisting of a protruding part 1 whose upper surface 1A is exposed to the bowling ball surface and which is formed into the same curved surface as the bowling ball surface, and a support part 2 which projects laterally from the lower part of the protruding part. .