Patent ID: 6722589
Filing Date: 2004-04-20
Classification: B61C

Abstract:
A slip prevention particle injection device, comprising:a particle retainer tank (1) for retaining the preventing slippage particles, an air through-flow duct (5) provided inside said tank, an air flow duct (6) provided so as to be communicated with the air through-flow duct in a state in which one end thereof is open inside said tank, an air supply duct (17) for supplying compressed air to the air through-flow duct and the air inflow duct, a smaller-diameter air passage section (19) provided in the air through-flow duct (5), a mixing chamber (15) for mixing said particles with compressed air, a particle introduction hole (16) for introducing said particles into the mixing chamber, an air discharge duct (18) having one end thereof open inside said tank, and an injector duct (21) for injecting said particles together with compressed air, wherein an air flow rate adjusting means (7) for adjusting the flow rate of compressed air is provided in said airflow duct, said air supply duct (17) is connected to the air flow-through duct (5) in the vicinity of a tank inlet opening (5a), said smaller-diameter air passage section (9) is provided on the side of the mixing chamber (15) for said particles and compressed air in the vicinity of the connection portion of said air flow-through duct and said air inflow duct, said injector duct (21) is connected to the outlet side of the air flow-through duct (5), and an injector nozzle (22) is provided at the distal end of said injector duct, the compressed air supplied from the air supply duct is branched into the air flow-through duct (5) and the air inflow duct (6) connected to the air flow-through duct (5), the compressed air flowing in the air inflow duct is introduced into the particle retaining tank from an opening (6a) of the air inflow duct, the pressure inside the tank is increased, the particles are introduced from said particle introduction hole (16) into said mixing chamber (15) by applying the appropriate pushing force to the particles present in the tank, the particles and the compressed air introduced from the smaller-diameter air passage section (9) provided in said air inflow duct (5) are mixed together inside said mixing chamber, and the particles mixed with air are injected from the injector nozzle (22) via the injector duct (21) connected to the air through-flow duct (5).