Portable gun-type adhesive discharger

A gun-type portable adhsesive discharger comprising a main case body for supporting a rigid adhesive stick extending in a longitudinal direction of said main case body, a hand grip portion for holding said main case body, a heating unit disposed in said main case body for melting said adhesive stick, said heating unit comprising a catalytic combustion unit disposed in said main case body and at a position adjacent said rigid adhesive stick, a nozzle portion connected to a front end of said main body for discharging said adhesive stick melted by said heating unit, and, a trigger portion disposed at said hand grip portion and connected to said adhesive stick for feeding said adhesive stick toward said nozzle portion, said main case body and said hand grip portion providing an interior space therein,

• a gas supply unit having a gas reservoir disposed in said hand grip portion for storing catalytically cumbustible substance therein, and
• an ignition unit for igniting said catalytically combustible substance, said ignition unit being disposed in said interior space,
• said gas supply unit comprising a gas flow regulating unit disposed in said interior space and positioned above said gas reservoir for supplying controlled amounts of said combustible substance to said catalytic combustion unit, said gas flow regulating unit comprising:
• a valve support member having an upper hollow open end portion and a lower wall, said lower wall being formed with a central recess, said central recess being in fluid communication with said catalytic combustion unit;
• a valve member slidably disposed in said central recess;
• a pressure adjusting plate slidably disposed with respect to said upper hollow open end portion;
• a diaphragm member disposed between said pressure adjusting plate and said lower wall for urging said valve member;
• and,
• a gas flow adjusting member disposed at an open end of said gas reservoir, said lower wall and said gas flow adjusting member defining a first chamber therebetween, said lower wall and said diaphragm member defining a second chamber therebetween;
• said first and second chambers being selectively communicable with each other upon sliding movement of said valve member.

A gun-type portable adhesive discharger comprising:

• a main case body for supporting a rigid adhesive stick extending in a longitudinal direction of said main case body, said main case body having an exhaust opening,
• a hand grip portion for holding said main case body,
• a heating unit disposed in said main case body for melting said adhesive stick, said heating unit comprising a catalytic combustion unit disposed in said main case body and at a position adjacent said rigid adhesive stick,
• a nozzle portion connected to a front end of said main body for discharging said adhesive stick melted by said heating unit,
• a trigger portion disposed at said hand grip portion and connected to said adhesive stick for feeding said adhesive stick toward said nozzle portion, said main case body and said hand grip portion providing an interior space therein,
• a gas supply unit having a gas reservoir disposed in said hand grip portion for storing catalytically combustible substance therein,
• said gas supply unit comprising a gas flow regulating unit disposed in said interior space positioned above said gas reservoir for supplying controlled amounts of said combustible substance to a mixing pipe in which said combustible substance is mixed with air and then supplied to said catalytic combustion unit,
• an ignition unit for igniting said catalytically combustible substance, said ignition unit being disposed in said interior space,
• a heat transmission pipe extending in said main case body for allowing said adhesive stick to pass therethrough, said heat transmission pipe being in contact with said catalytic combustion unit,
• said catalytic combustion unit comprising a gas injection member connected to said gas flow regulating unit, said gas injection member extending parallel to said heat transmission pipe, first and second catalysts provided over said gas injection member, and a heat retaining pipe disposed over said first and second catalysts, said heat retaining pipe extending in a direction parallel with said gas injection member,
• said catalytic combustion unit having a combustion exhaust gas passage formed at a front end portion thereof, said combustion exhaust gas passage and said exhaust opening being substantially coaxial with said gas injection member and said heat retaining pipe for linearly discharging said exhaust gas in a direction parallel with said nozzle portion,
• said mixing pipe being positioned opposite said exhaust gas passage with respect to said gas injection member and said heat retaining pipe.