屋外線引留金物の試作について

抄録

For the purpose of improving the capacity of the clamp implement for the drop wire, studies have been made of the clamp implement with reference to its necessary conditions for the purpose, and also of the interrelations between the size, the shape, the combination of each contact guide, the clamping power and the damage load of PVC sheath, and the standard design of the clamp implement has been specially investigated.
The results obtained are as follow,
(1) The damage load of PVC sheath increases linearly with the radius of contact guide, and the increase of contact area is valid.
(2) The clamping power increases with pressure angle and back tension, and the increase of contact area is valid.
(3) The clamping power and the damage load of PVC sheath are variable, dependent on the relative position of the friction part and the back tension part, and it is most important by what type of function these two parts are separated.
On the results of these experiments a clamp implement has been developed of polyvinyl chloride and shaped by pouring the material into the mold and hardening the same, to substitute the accustomed metal implement. The new polyvinyl clamp implement, with its characteristic features over the metal work mechanically and operatively, and not being subject to corrosion, is more highly marketable, and possible of massproduction besides.