Baseball bat

Abstract

There is provided a baseball bat that has performance similar to that of the conventional wooden bat and moreover is excellent in terms of cost and resource conservation. For this baseball bat 11, a reinforcing core 12 having a rectangular cross section is arranged in the center of the cross section thereof continuously so as to penetrate both end thereof, bamboo pieces 24 are laminated around the reinforcing core 12, and an adhesive is caused to permeate into the contact surface between the reinforcing core 12 and the bamboo pieces 24 evenly under a pressure, by which firm bonding can be attained. In addition, by using a material that is hard and has a large specific gravity as compared with bamboo, such as hickory or reinforced wood, as the reinforcing core 12, the flexural rigidity is enhanced as a whole, and the weight is increased. Therefore, the characteristics and feel in use are improved as compared with the conventional bamboo bat, and the baseball bat 11 can be used as a substitute for a wooden bat. Bamboo, hickory, and reinforced wood have no problem in terms of resource conservation, can reduce the product price, and can lower the consumption of scarce resources such as serrata.

1 . A baseball bat comprising:
 a reinforcing core arranged in the center of the cross section thereof; and   an outer peripheral material which surrounds the reinforcing core and is formed by collecting laminated bodies of bamboo pieces, wherein   the reinforcing core and the individual bamboo pieces are integrated by bonding; and   the reinforcing core has a rectangular cross section, and is provided penetratingly from a distal end to a proximal end of bat so that both of the reinforcing core and the bamboo pieces exist in all of the transverse cross sections from the distal end to the proximal end of bat.   
   
   
       2 . The baseball bat according to  claim 1 , wherein the material of the reinforcing core is hickory. 
   
   
       3 . The baseball bat according to  claim 1 , wherein the material of the reinforcing core is reinforced wood. 
   
   
       4 . The baseball bat according to  claim 1 , wherein each side of the cross section of the reinforcing core has a length not shorter than 15 mm and not longer than 20 mm. 
   
   
       5 . The baseball bat according to  claim 1 , wherein one side of the cross section of the reinforcing core has a length not shorter than 30 mm and not longer than 40 mm, and the other side thereof has a length not shorter than 5 mm and not longer than 12 mm. 
   
   
       6 . The baseball bat according to  claim 2 , wherein each side of the cross section of the reinforcing core has a length not shorter than 15 mm and not longer than 20 mm. 
   
   
       7 . The baseball bat according to  claim 3 , wherein each side of the cross section of the reinforcing core has a length not shorter than 15 mm and not longer than 20 mm. 
   
   
       8 . The baseball bat according to  claim 2 , wherein one side of the cross section of the reinforcing core has a length not shorter than 30 mm and not longer than 40 mm, and the other side thereof has a length not shorter than 5 mm and not longer than 12 mm. 
   
   
       9 . The baseball bat according to  claim 3 , wherein one side of the cross section of the reinforcing core has a length not shorter than 30 mm and not longer than 40 mm, and the other side thereof has a length not shorter than 5 mm and not longer than 12 mm.