TECHNICAL FIELD

The present specification relates to a component mounting machine.

BACKGROUND ART

Conventionally, there has been known a component mounting machine including a component mounting head for picking up a component by suction and mounting the component on a board (e.g., see Patent Literature 1). The component mounting head includes a head main body mounted on a base of the component mounting machine, a suction nozzle detachably mounted on the head main body, and a nozzle lifting and lowering mechanism for moving the suction nozzle up and down with respect to the head main body.

The head main body can move in the horizontal direction with respect to the base while holding the suction nozzle. The nozzle lifting and lowering mechanism has a lifting and lowering shaft which is held by the head main body such that the lifting and lowering shaft can be lifted and lowered. A coil spring and a locking ring are fitted on the outer periphery of the lower end of the lifting and lowering shaft. In a state in which the suction nozzle is not mounted, the locking ring is positioned at a position in which the gravitational force of the locking ring is balanced with the urging force of the coil spring with respect to the lifting and lowering shaft. A pair of slots facing each other with the axial center therebetween are formed in the side wall at the lower end of the lifting and lowering shaft. Each slot is a J-shaped slot extending upward from an opening at the lower end of the lifting and lowering shaft, then extending in a circumferential direction, and then slightly extending downward.

The suction nozzle is detachably mounted to the lower end of the lifting and lowering shaft attached to the head main body. That is, the suction nozzle has a nozzle main body at the lower end for picking up components by suction and has a nozzle holder section at the upper end detachably held with respect to the lifting and lowering shaft. The nozzle holder section has a cylindrical section, which is inserted into an attachment hole at the lower end of the lifting and lowering shaft, and a pair of locking pins protruding radially outward from the side wall of the cylindrical section. The suction nozzle is mounted to the lifting and lowering shaft by inserting the cylindrical section into the attachment hole of the lifting and lowering shaft, inserting and engaging the locking pins into the slot of the lifting and lowering shaft from the lower end, pushing up the locking ring against the urging force of the coil spring, and then, after the locking pins reach a seating portion at the innermost portion of the slot, pushing down the lower face of the locking ring by the urging force of the coil spring. The suction nozzle is fitted into the lifting and lowering shaft with a clearance provided by an O-ring or the like.

In the component mounting machine described above, after the suction nozzle is exchanged, the lifting and lowering shaft to which the suction nozzle is mounted is lowered with respect to the head main body so that the lower end of the suction nozzle is pressed against the upper face of a jig base. In this case, since the suction nozzle is pressed upward, the seating position of the suction nozzle with respect to the lifting and lowering shaft is stabilized, thereby improving the positioning accuracy of the suction nozzle.

PATENT LITERATURE

Patent Literature 1: Japanese Patent Application Laid-Open No. 2017-92200

BRIEF SUMMARY

Technical Problem

However, as described above, when the suction nozzle is pressed against the jig base at the lower end after being exchanged, although it is possible to improve the seating of the suction nozzle in the up-down direction with respect to the lifting and lowering shaft, it is difficult to improve the horizontal seating including the angular deviation and the offset deviation of the suction nozzle axis.

This phenomenon also occurs in a structure in which a push-up pot provided in a die supply device is mechanically clamped to a robot with a taper clamp or the like. Generally, with a taper clamp or the like, shifting of the shaft may occur due to a slight deviation in the shape or assembly. Therefore, even if a push-up pot is pressed against a jig base from the top after an exchange, it is difficult to improve the seating, particularly in the horizontal direction, only by applying a downward pressing force on the push-up pot.

It is an object of the present specification to provide a component mounting machine capable of stabilizing the seating of a mounting/demounting tool detachably mounted on a mounting base.

Solution to Problem

The present specification discloses a component mounting machine, comprising: a mounting base provided in a component mounting machine main body and movable at least in the horizontal direction; a mounting/demounting tool, detachably mounted on the mounting base and movable in the up-down direction while holding a component; a tool moving mechanism configured to move the mounting/demounting tool in the up-down direction; a mounting base moving mechanism configured to move the mounting base at least in the horizontal direction; and a control device configured to perform a seating improvement process for applying a force in a predetermined direction, including the horizontal direction, to the mounting base on which the mounting/demounting tool is mounted after the mounting/demounting tool is mounted on the mounting base but before the mounting/demounting tool holds the component, by a moving operation different from the moving operation for holding the component on the mounting/demounting tool in the mounting base moving mechanism.

According to the present disclosure, the seating improvement process is executed after the mounting/demounting tool is mounted on the mounting base but before the mounting/demounting tool holds a component, and a force is applied to the mounting base in a predetermined direction including the horizontal direction by a moving operation different from the moving operation for holding a component in the mounting base moving mechanism. By the action of this force, the mounting base and the mounting/demounting tool can move relative to each other. Therefore, it is possible to improve the engagement between the mounting base and the mounting/demounting tool such that the positional relationship between them is stable. Thus, it is possible to stabilize the seating of the mounting/demounting tool detachably mounted to the mounting base.

