Tip member of fixing tool of ground installation anchor type

Abstract

A tip member of a fixing tool of ground installation anchor type, in which a ground biting part formed substantially in a spiral shape for biting into the ground is provided on an outer circumferential surface of an elongated body with a circular cross section so that the fixing tool of ground installation anchor type can be installed by being rotated about an axis and thereby biting into the ground, includes a circular base part fixedly attached in a continuous state to the elongated main body; a conical body part that tapers from the circular base part toward the tip; and a streak projection part provided integrally on an outer surface of the conical body part in a form projecting outward between a maximum diameter part of the conical shape and a vertex of the conical shape and in a form extending linearly along a generatrix of the cone.

1 . A tip member of a fixing tool of ground installation anchor type being fixedly attached to the fixing tool of ground installation anchor type so as to form a tip part of the fixing tool of ground installation anchor type in which a ground biting part formed substantially in a spiral shape for biting into the ground is provided on an outer circumferential surface of an elongated body with a circular cross section so that the fixing tool of ground installation anchor type can be installed by being rotated about an axis and thereby biting into the ground, the tip member comprising:
 a circular base part being fixedly attached in a continuous state to the elongated main body with the circular cross section;   a conical body part tapering from the circular base part toward the tip; and   a streak projection part being provided integrally on an outer surface of the conical body part in a form projecting outward between a maximum diameter part of the conical shape and a vertex of the conical shape and in a form extending linearly along a generatrix of the cone.   
     
     
         2 . The tip member of the fixing tool of ground installation anchor type according to  claim 1 , wherein a shoulder part, which is formed on a maximum diameter part side of the conical shape of the streak projection part and which projects outermost, is projected further outward than the outer circumferential surface of the elongated body with the circular cross section and not projected further outward than an outer diameter part of the ground biting part. 
     
     
         3 . The tip member of the fixing tool of ground installation anchor type according to  claim 2 , wherein a height of the streak projection part projecting from an outer surface of the conical body part is made gradually lower from the maximum diameter part of the conical shape of the conical body part toward the vertex thereof like a tapered shape. 
     
     
         4 . The tip member of the fixing tool of ground installation anchor type according to  claim 3 , wherein the three streak projection parts are provided to circumferentially equally divided positions on the outer surface of the conical body part. 
     
     
         5 . The tip member of the fixing tool of ground installation anchor type according to  claim 4 , wherein the elongated body with the circular cross section is formed into a tubular shape having a hollow part into which a rod body can be inserted, the tip member is fixedly attached to the elongated body with the circular cross section so as to close the hollow part.