Artificial lawn and method of manufacturing the same

Abstract

Imitation lawns are prevented from coming off a laying board 3 due to influence of temperature on an adhesive, secular deterioration of the adhesive, load of an external force exceeding an adhesive strength, load of a strong lateral slide force, and the like. In an artificial lawn including imitation lawns 2 , and a laying board 3 onto which the imitation lawns are planted, the imitation lawns 2 each include a bunch of foliaceous pieces 4 and a root portion 5 which bundles the bunch of foliaceous pieces, while the laying board 3 includes a plurality of root portion pots 6 into which the root portions 5 of the imitation lawns 2 are forcibly fit, respectively. A bifurcate pin member 7 having two pin tips is driven onto an upper part of the root portion 5 of the imitation lawn 2 forcibly fit in the root portion pot 6 of the laying board 3, such that the pin member traverses a middle part of the root portion, from which the foliaceous pieces 4 are parted, and strides across both sides of an opening of the root portion pot 6, whereby the imitation lawn 2 is fixed to the laying board 3.

1 . An artificial lawn characterized by comprising imitation lawns ( 2 ), and a laying board ( 3 ) onto which said imitation lawns are planted, said imitation lawns ( 2 ) each including a bunch of foliaceous pieces ( 4 ) and a root portion ( 5 ) which bundles the bunch of foliaceous pieces, said laying board ( 3 ) including a plurality of root portion pots ( 6 ) into which said root portions ( 5 ) of said imitation lawns ( 2 ) are forcibly fit, respectively, said each imitation lawn ( 2 ) being fixed to said laying board ( 3 ) by driving a bifurcate pin member ( 7 ) having two pin tips onto an upper part of the root portion ( 5 ) of said imitation lawn ( 2 ) forcibly fit in the root portion pot ( 6 ) of said laying board ( 3 ), such that said pin member traverses a middle part of the root portion, from which said foliaceous pieces ( 4 ) are parted, and strides across both sides of an opening of said root portion pot ( 6 ).  
   
   
       2 . An artificial lawn as set forth in  claim 1 , characterized in that said laying board ( 3 ) has a pair of guide grooves ( 15 ) or ( 35 ) for specifying drive positions of both the pin tips of said pin member ( 7 ), the guide grooves being formed in a peripheral wall part of said each root portion pot ( 6 ) at positions opposing to each other through the opening of said root portion pot ( 6 ).  
   
   
       3 . An artificial lawn as set forth in  claim 1 , characterized in that both the pin tips of said pin member ( 7 ) pierce through a bottom part of said root portion pot ( 6 ) of said laying board ( 3 ) and are folded back.  
   
   
       4 . A method of manufacturing an artificial lawn ( 1 ), wherein imitation lawns ( 2 ), each of which includes a bunch of foliaceous pieces ( 4 ) and a root portion ( 5 ) bundling the bunch of foliaceous pieces, are planted onto a laying board ( 3 ) formed with a plurality of root portion pots ( 6 ) capable of receiving the root portions, respectively, 
 the method being characterized in that the artificial lawn is manufactured by: forcibly fitting the root portion ( 5 ) of the imitation lawn ( 2 ) into the corresponding root portion pot ( 6 ) of said laying board ( 3 ); driving a bifurcate pin member ( 7 ) having two pin tips onto an upper part of said root portion ( 5 ) such that said pin member traverses a middle part of the root portion, from which said foliaceous pieces ( 4 ) are parted, and strides across both sides of an opening of said root portion pot ( 6 ).    
   
   
       5 . A method of manufacturing an artificial lawn, characterized by comprising steps of: folding a lawn strand ( 23 ) in two at an intermediate position in its longitudinal direction, the lawn strand comprising a large number of fine resin strings ( 24 ) bundled and twisted into a shape of a rope; forcibly fitting the fold of the lawn strand ( 23 ) into a predetermined one of root portion pots ( 6 ) of a laying board ( 3 ) formed with a plurality of root portion pots ( 6 ) capable of receiving the folds; driving a bifurcate pin member ( 7 ) having two pin tips onto a crotch part of the fold from which the lawn strand ( 23 ) extending out of the root portion pot ( 6 ) is divided into two directions, such that the pin member traverses the crotch part and strides across both sides of an opening of the root portion pot ( 6 ); and thereafter unfastening the respective rope strands of the lawn strand ( 23 ) extending out of the root portion pot ( 6 ), thereby separating the resin strings ( 24 ) from each other.  
   
   
       6 . A method of manufacturing an artificial lawn, characterized by comprising steps of: folding a lawn strand ( 23 ) in two at an intermediate position in its longitudinal direction, the lawn strand ( 23 ) comprising a large number of fine resin strings ( 24 ) bundled and twisted into a shape of a rope; forcibly fitting the fold of the lawn strand ( 23 ) into a predetermined one of root portion pots ( 6 ) of a laying board ( 3 ) formed with a plurality of root portion pots ( 6 ) capable of receiving the folds; driving a bifurcate pin member ( 7 ) having two pin tips onto a crotch part of the fold from which the lawn strand ( 23 ) extending out of the root portion pot ( 6 ) is divided into two directions, such that the pin member traverses the crotch part and strides across both sides of an opening of the root portion pot ( 6 ); folding one of the lawn strand ( 23 ) extending out of the root portion pot ( 6 ) at a position the lawn strand reaches an adjacent root portion pot ( 6 ); forcibly fitting the fold of the lawn strand ( 23 ) into the adjacent root portion pot ( 6 ); driving a bifurcate pin member ( 7 ) onto a crotch part of the fold, similarly to the above; cutting an intermediate part of the lawn strand ( 23 ) bridging between the adjacent root portion pots ( 6 ); and thereafter unfastening the respective rope strands of the lawn strand ( 23 ) extending out of each of the root portion pots ( 6 ), thereby separating the resin strings ( 24 ) from each other.  
   
   
       7 . An artificial lawn as set forth in  claim 2 , characterized in that both the pin tips of said pin member ( 7 ) pierce through a bottom part of said root portion pot ( 6 ) of said laying board ( 3 ) and are folded back.