| 摘要 |
Hot melt guns comprising a melt body having a melt chamber and a mechanism for feeding a rod of solid hot melt material to the chamber for melting and dispensing. The feeding mechanism comprises a carriage mounted for movement towards and away from the melt body, a clamp member pivotally mounted on the carriage and a trigger to cause the clamp member to grip the rod and feed it into the melt chamber. The clamp member has two pivot pins projecting from opposite sides, each pin having an arcuate coaxial bearing portion and at least one flat face. The pins are received in bearing openings defined by circular bearing surfaces in the carriage, Assembly openings are provided in each bearing surface extending around a minor arc and sufficiently wide for the pins to pass through when the flat faces are suitably oriented relative to the openings. However, when the gun is fully assembled, the arc of movement of the clamp member is restricted so that the pins cannot reach an orientation where the faces are sufficiently aligned with the assembly openings to permit the pins to be withdrawn. |
