JPS6133683A - Stick for gate ball - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a stick used for gateball, and more particularly to a stick for gateball having a stick head made of cellulose resin.

(Prior art) Recently, as a family sport, a new ball game that is useful for relieving stress and lack of exercise, especially among middle-aged and elderly people, has been developed using a ball made of wood or plastic and a mallet-shaped ball with a long and thin wooden handle to hit the ball. The game of gateball, which uses a stick as the main tool, is becoming more and more popular.

This gateball is based on the British national game, Cricketball, where each player has 2 points out of 5 players. Players use a wooden stick to hit a wooden or plastic ball through three gates set up in the goal, and then hit the goal in the center to compete for points. The wooden stick used to hit the ball is shaped like a mallet, and has a cylindrical body (which is the ball hitting part).
The standard specifies that the stick head has a diameter of 4.5 mm and a length of 24 mm, and the length of the handle attached to the main body is 710111 mm. In this gateball game, the stick head is mainly made of hardwood, so when the ball is hit, it emits an indescribable wooden sound and sound, which makes the game even more interesting.

(Problem that the invention aims to solve) However, on the other hand, the hitting stick head is not only hit repeatedly with a hard ball and with strong force, but also sometimes hits the ground or hits a pebble. However, there was a major drawback in that the striking surface of the stick head and its vicinity were dented, worn out, cracked, and damaged very quickly, rendering it unusable. In addition, since it is made of wood, it is easily affected by the environment such as temperature, humidity, and humidity during use, and is prone to damage such as cracks, chips, hangnails, and scratches, which can reduce the durability and life of the stick and affect its appearance. There were drawbacks such as poor appearance and poor direction of the ball. However, in order to improve this drawback, a head made of a reinforced material made by impregnating the wood structure with thermosetting resins such as melamine resin, phenolic resin, urea resin, and polyester resin, and hardening it by heating and compressing it, was developed. When a player performs a play in which he or she hits the opponent's ball closely with his or her own ball, the impact of the hit is transmitted through the stick to the wrist or upper arm, causing wrist injury or muscle pain. The stick head also has the disadvantage of being repeatedly hit with strong force, causing hangnails to form along the woody structure, or parts of the stick to crack or crack.
It was not very effective against tearing the throat, and it was not effective against the drawback that the direction of the ball was inconsistent due to the wood. As a result, the impact on the human body is milder than before, resulting in less wear and tear.
A stick that would not cause damage was requested.

(Means for solving the problems) The present invention was invented based on the above requirements,
The purpose is to provide a stick for gate poles that has low impact, does not cause wear or damage to the stick head, does not impair the function of the stick, has good durability, and has good directionality when hitting the ball. be.

That is, one aspect of the present invention is a gateball stick in which the stick head fixed to the end of the handle is made of cellulose resin.

Hereinafter, the present invention will be explained based on the drawings of the embodiment.
As shown in the figure, a stick head (1) is formed to have a predetermined length, that is, 24 mm, and a predetermined handle 2'' extending in the radial direction is located at the center of this stick head 1 having a diameter of 4.5 mm. It is joined.

The stick head is made of cellulose resin by extrusion molding.
It is formed into a 50mm round bar shape, cut to a predetermined length, and has a hole drilled in the center to attach a predetermined handle (2) extending in the radial direction. The handle (2) can be made of conventionally used wood, metal, or the like.

The cellulose resin used in the present invention is a fatty acid cellulone ester resin, and the fatty acid cellulose ester is one obtained by esterifying some or all of the hydroxyl groups of cellulose with an organic acid, and preferably cellulose acetate, They are cellulose acetate propionate and cellulose acetate ghylate.

Particularly preferred are cellulose acetate propionate containing 37-44% of acetyl groups, 54-57% of propioni/L' groups, 6-10% of acetyl groups, and cellulose acetate propionate containing 3.4-39% of butryl groups and acetyl groups. Group 13-1
5% cellulose acetate glylate, etc.

As for the manufacturing method of the step 5 screw used in the present invention, any suitable plastic molding method can be used, such as injection molding, extrusion molding, compression molding, etc. Among them, 6. It is preferable to manufacture by extrusion molding method. To manufacture using this extrusion method, it is sufficient to extrude a piece of a tough fatty acid or cellulose to ester that increases processability, cut it to a specified length, and finish it by cutting the cut surface.

Examples and Comparative Examples 138 parts by weight of diethyl phtaso as a plasticizer per 100 parts by weight of cellulose acetate grates made from wood pulp (degree of acetylation 55.0%, degree of polymerization 1'60, ash content α 038%) was added, and various stabilizers shown in Table 1 were added in the specified amounts for the nails of cellulose acetate flakes 1003], mixed well with a universal mixer (manufactured by Sanei Seisakusho), and dried at 60°C for 15 hours. .

20% of the dried compound with a 30ff small extruder
Pelletization was carried out at a temperature of 0°C.

Using this pellet, a round bar with a diameter of 4.5 (1) y was extruded using the usual round bar extrusion method, and its physical properties were determined and compared with a generally used gateball stick head. A piece was cut and prepared, and various tests were conducted and compared. The results are shown in Table 1.

(Effects of the Invention) As can be seen from the results in Table 1, the stick head according to the present invention not only has high repeated impact strength, but also has strong impact resistance against high impacts such as falling weights, and the stick head It has high impact resistance even when subjected to side impacts, and unlike wood, the wood structure does not have a directional structure that shows in the direction of the grain, and even in repeated tests, it does not crack or crack. Therefore, it can sufficiently withstand long-term use. Also, the wear resistance is less compared to wooden heads.

The present inventors also investigated cellulose acetate glopionate and cellulose acetate butyrate, but obtained similar results.

[Brief explanation of the drawing]

4.1 Figure 1 is a front view of the gateball stay/axe (1) Stick head (2) Handle 1 Figure

Claims (1)

[Claims] A gateball stick with a stick head fixed to the end of the handle made of cellulose resin.