JP3296953B2 - Moving range adjustment structure of component mounter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for adjusting a moving range of a head unit in a component mounting machine in which a head unit moves in X and Y directions to mount components.

[0002]

2. Description of the Related Art Conventionally, a component mounting machine which sucks an electronic component from a component supply unit by a head unit provided with a nozzle member for picking up a component and mounts the component at a predetermined position on a printed circuit board is generally used. Are known. In many mounting machines of this type, the head unit is movable in the XY directions. That is, the mounting machine includes a head support member movably disposed on a Y-axis guide member provided on a base, and a head held movably in the X-axis direction by the head support member. Unit, a Y-axis servomotor that drives the support member in the Y-axis direction via a ball screw shaft provided on the base, and a head unit in the X-axis direction via a ball screw shaft mounted on the support member. And an X-axis servomotor for driving the motor.

[0003] The drive of each of the servo motors is controlled in a state in which the printed circuit board carried in by a conveyor or the like is held at a predetermined position, so that the head unit extends over the component supply unit and the printed circuit board. The component which moves and is sucked by the component supply unit is mounted on a printed circuit board.

[0004]

In this type of component mounter, the head unit is provided so that the nozzle member provided in the head unit extends over a position corresponding to the component supply section and a position corresponding to the component mounting location on the printed circuit board. The head unit and the head support member in the X-axis direction and the Y-axis direction so that the head unit and the head support member can be moved, and the head unit does not move more than necessary and interfere with other members.
It is required that the range of movement in the axial direction be regulated.

As means for regulating the movement range, a stopper for mechanically regulating the movement range in the X-axis direction and the Y-axis direction, a reference position for control and a movement limit position are detected. It is conceivable to provide a position detecting member.

By the way, there are various types of head units in a mounting machine, and the number, arrangement, etc. of the nozzle members provided vary depending on the type. It is preferable that the main body portion including the above is made common and various types of head units are selectively attached to the common main body portion because the manufacturing process can be streamlined.

[0007] However, in the case where the main body portion is to be shared as described above, it is only necessary to fixedly set the moving range of the head unit regulated by the stopper and the position detecting member, and the nozzle unit depends on the attached head unit. When the number, arrangement, and the like of the members change, the actual work area changes, so that there remains a problem that the requirement for securing a necessary work area and preventing interference with other members may not be satisfied.

In view of the above circumstances, the present invention makes it possible to equip various types of head units while sharing the main body of the mounting machine, and furthermore, restricts the movement range according to the installed head units. An object of the present invention is to provide a structure for adjusting a moving range of a component mounter that can be appropriately performed.

[0009]

To achieve the above object, the present invention provides a guide member provided on a base in a Y-axis direction and supported by the guide member so as to be movable in the Y-axis direction. A head support member, a drive mechanism for moving the head support member in the y-axis direction, a component mounting head unit supported by the head support member so as to be movable in the x-axis direction, and a head support member for mounting the head unit. And a drive mechanism for moving the head unit in the X-axis direction with respect to the head support member. Next, a stopper and a position detecting member for regulating the range of movement of the head support member in the Y-axis direction and the range of movement of the head unit relative to the head support member in the X-axis direction are provided. Each one in which was mounted for position change.

According to this structure, the main body portion including the base and the head support member is shared, and various types of head units can be selectively attached to the common main body portion. Further, the moving range of the head support member in the Y-axis direction and the moving range of the head unit in the X-axis direction with respect to the head supporting member are adjusted by changing the mounting positions of the stopper and the position detecting member according to the type of the head unit to be mounted. Becomes possible.

[0011]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic configuration of a component mounter having the structure of the present invention, and FIGS. 2 and 3 show an example of the entire structure of the component mounter. In these figures, reference numeral 1 denotes a base of a mounting machine, and 5 denotes a head unit for mounting components movably mounted above the base. The head unit 5 includes various types of heads as described later. One of the units 5A, 5B, 5C is selectively and interchangeably mounted.

A conveyor 2 for transporting a printed board is arranged on a base 1 of the mounting machine, and a printed board 3 is transported on the conveyor 2 and stopped at a predetermined mounting work position. I have. A component supply unit 4 is arranged on the side of the conveyor 2. The component supply unit 4 includes a component supply feeder, for example, a multi-row tape feeder 4a.

A head support member 10 is mounted on the base 1.
Are movably supported in the Y-axis direction, and the head unit 5 is movably supported in the X-axis direction with respect to the head support member 10, so that the head unit 5 is It is possible to move in the Y direction. Then, a driving mechanism for moving the head support member 10 in the Y-axis direction and the head unit 5 with respect to the head support member 10.
A drive mechanism for moving the head in the X-axis direction is provided on the base 1, the head support member, and the like. Further, an imaging means 6 for component recognition such as a CCD line sensor is provided at a predetermined position on the base, and when a component is mounted by a first type head unit 5A described later. For example, the component picked up by the nozzle member is picked up by the image pick-up means 6, and the picked-up state of the component is checked based on the image.

The structure for enabling the movement of the head support member 10 and the head unit 5 and the respective driving mechanisms are specifically as follows.

That is, a pair of guide members 7 in the Y-axis direction are disposed on the base 1 at a predetermined distance in the X-axis direction.
a is provided. Further, on the base 1, a ball screw shaft 8 arranged in parallel with the guide rail 7a and a Y-axis servomotor 9 for driving the ball screw shaft 8 are provided. Is configured.

The head support member 10 has a frame 11 extending in the X-axis direction. Both ends of the head support member 10 are supported by the guide member 7 so as to be movable in the Y-axis direction. Is screwed into the ball screw shaft 8 so as to move in the Y-axis direction with the rotation of the ball screw shaft 8. The support member 10 is equipped with a ball screw shaft 13 extending in the X-axis direction along the frame 11 and an X-axis servo motor 14 for driving the ball screw shaft 13. A drive mechanism is configured.

The head unit 5 includes the frame 1
1. Mounting frame 15 supported so as to be movable in the X-axis direction
And a head assembly attached to the mounting frame 15. A nut portion 16 (see FIG. 9) provided on the mounting frame 15 is screwed to the ball screw shaft 13, thereby forming a ball screw shaft. It moves in the X-axis direction with the rotation of 13.

Head unit 5 mounted on component mounter
There are various types, and several examples will be described below.

FIGS. 2, 3 and 4 (a) show a first type of head unit 5A. This head unit 5A has eight nozzle members 21 and these nozzle members 21 They are arranged in a line in the X-axis direction. Each nozzle member 21 can move in the Z-axis direction (vertical direction) and rotate around the R-axis (nozzle center axis), and can be moved in the Z-axis direction by Z-axis driving means such as a servo motor or an air cylinder (not shown). While being driven, it is designed to be rotationally driven by an unillustrated R-axis servomotor via a transmission mechanism such as a belt. Negative pressure supply means (not shown) is connected to the nozzle member via a valve or the like, and a negative pressure from the negative pressure supply means is supplied to the tip of the nozzle member at a predetermined timing during component suction. It has become so.

FIGS. 4B, 5 and 6 show a second type of head unit 5B. This head unit 5B has two nozzle members 22, 22 '. 22 and 22 'are arranged at predetermined intervals in a direction oblique to the X and Y axes. Each of the nozzle members 22, 22 'is individually provided with a Z-axis servomotor 23,
23 'and R-axis servo motors 24, 24'.

At the lower end of the head unit 5B,
A projection detection unit 25 for component recognition is provided. The projection detection unit 25 includes the nozzle members 22 and 2
Irradiation portions 25a for irradiating a light beam such as a laser beam on both sides of the space where 2 'is located, and CCs for receiving the light beams
D and the like. Then, at the time of component recognition after component suction, the components sucked by the nozzle members 22, 22 'are raised to the predetermined height position corresponding to the projection detection unit 25, and then the nozzle members 22, 22' are lifted. While the 22 'is being rotated, the light is emitted from the irradiating section 25a to the component, the projection of the component is detected by the light receiving section 25b, and the component suction state is checked based on the detection.

FIG. 4C shows a head unit 5C of a third type.
The nozzle members 26 are provided, and these nozzle members 26 are arranged at predetermined intervals in the X-axis direction. These nozzle members 26 are provided with a Z-axis servo motor (not shown) and
It is designed to be driven by a shaft servomotor.

Such various types of head units 5
The base 1 and the head support member 10 constituting the mounting machine main body portion are common to (5A, 5B, 5C), and the head unit 5 can be exchangeably attached to the head support member 10. ing. Further, as a structure for adjusting the moving range in the X-axis direction and the Y-axis direction according to the head unit to be attached, stoppers 31 for controlling the moving range are provided on the guide member 7 and the head supporting member 10.
41 and dogs 32, 33, 42, 43 (position detecting members) are mounted so that the positions can be changed.

The moving range adjusting structure will be specifically described with reference to FIGS. In these figures, a plate 18 fixed to the lower surface side of both ends of the head support member 10 is shown.
Is attached to a slide member 19 fitted to the guide rail 7a at the upper end of the guide member 7 with a bolt or the like, so that the head support member 10 is supported by the guide member 7. A mounting frame 15 of the head unit 5 is fitted to the member 10 so as to be movable in the X-axis direction, and a head assembly is replaceably mounted to the mounting frame 15 with bolts or the like.

As shown in FIG. 7, the structure for regulating the range of movement of the head support member 10 in the Y-axis direction is, as shown in FIG. A pair of stoppers 31 for regulating, an origin dog 32 for detecting a control movement reference position,
A pair of limit dogs 33 for detecting a control movement limit position are provided on the guide member 7, while an origin sensor 34 and a limit dog 3 corresponding to the origin dog 32 are provided.
The limit sensor 35 corresponding to No. 3 is attached to the plate 18.

The stopper 31 and the dogs 32, 33
Is mounted so that the mounting position can be changed in the Y-axis direction. That is, as shown in FIG. 8, the stopper 31 is fixed to a stopper mounting hole 36 provided on the upper surface of the guide member 7 by a bolt.
A plurality of sets are provided at predetermined intervals in the axial direction, and the mounting position can be changed by selecting a stopper mounting hole 36 to be bolted. Further, since the stopper mounting hole 36 is a long hole, fine adjustment of the mounting position within the range of the long hole is possible. Similarly, an origin dog mounting hole 37 for bolting the origin dog 32 is provided.
Also, a plurality of sets of limit dog mounting holes 38 for bolting the limit dog 33 are provided at predetermined intervals in the Y-axis direction, and the mounting holes 37 and 38 are elongated holes, so that the mounting position of the limit dog 33 is elongated. It can be changed and adjusted.

As shown in FIG. 9, a structure for restricting the range of movement of the head unit 5 in the X-axis direction with respect to the head support member 10 is located near both ends of the frame 11 and mechanically provided. 5, a pair of stoppers 41 for restricting the movement range, an origin dog 42 for detecting an X-axis direction movement reference position for control, and a pair of limit dogs 4 for detecting an X-axis direction movement limit position for control.
3 is disposed on the head support member 10, while the origin sensor 44 and the limit dog 4 corresponding to the origin dog 42 are provided.
A limit sensor 45 corresponding to 3 is mounted on the mounting frame 15 of the head unit 5.

The stopper 41, the origin dog 42 and the limit dog 43 are also connected to the frame 11 of the head support member 10.
Are fixed by bolts to the mounting holes 46, 47, and 48 provided in the bracket, and a plurality of sets of the mounting holes 46, 47, and 48 are provided, and the mounting position in the X-axis direction can be changed by selecting the mounting hole to be bolted. Can be changed, and each of the mounting holes 46, 47,
48 is an elongated hole, and fine adjustment of the mounting position in the X-axis direction is possible within the range of the elongated hole.

The operation of the component mounter having the moving range adjusting structure according to this embodiment will be described below.

In the mounting operation, first, the head unit 5 moves to the component supply section and sucks the component by the nozzle member. Next, the component is recognized. For example, when the first type head unit 5A is used, the head unit 5A moves above the imaging unit 6 and the component is sucked based on the image captured by the imaging unit. The state is checked, and when the second type head unit 5B is used, the suction state of the component is checked based on the projection detection by the projection detection unit 25 provided therein. Then, the head unit 5 moves on the printed circuit board 3 and the component is mounted on the component mounting position of the printed circuit board.

In such a mounting operation, the origin positions of the head unit 5 in the Y-axis direction and the X-axis direction are
2, 42 and origin sensors 34, 44,
That is, the position at which the origin sensors 34 and 44 detect the origin dogs 32 and 42 is set as the origin, and the position of the head unit 5 is controlled based on this position. When the head unit 5 moves to the control limit position where the limit sensors 35 and 45 detect the limit dogs 33 and 43, the driving of the servo motors 9 and 14 is stopped, and the head unit 5 moves outward from it. When the head unit 5 exceeds the control limit position due to erroneous detection, erroneous control, or the like, the stoppers 31 and 41 prevent the head unit 5 from moving. By restricting the moving range in this way, interference with other members and the like can be avoided.

In regulating such a moving range,
The working area W by the nozzle member of the head unit 5 is set so as not to hinder the mounting operation as described above.
For example, it is required to secure a predetermined range as shown by hatching in FIG. 1 as (a range where the nozzle member can perform operations such as sucking and mounting).

The head units 5A, 5B and 5C of the various types shown in FIGS. 4A to 4C are different from each other in the number and arrangement of the nozzle members. Direction nozzle position (distance in Y-axis direction from head reference plane to nozzle center)
1. The size of the nozzle arrangement portion in the X direction (the distance between the centers of the nozzles in the X axis direction) is B1, and the Y direction nozzle position of each nozzle member in the head unit 5B of the second type is A2.
A2 ', the nozzle arrangement portion X direction dimension is B2, the Y direction nozzle position in the third type head unit 5C is A3, and the nozzle arrangement portion X direction dimension is B3.

[0034]

A1 <A2 = A3 <A2 ′ B2 <B3 <B1

Then, the stoppers 31, 41 and the dog 3
If the positions of 2, 33, 42, and 43 are constant, when the Y direction nozzle position and the size of the nozzle arrangement portion X direction are changed by the head units 5A, 5B, and 5C, the work area W is shifted accordingly. .

Therefore, the structure is such that the mounting positions of the stoppers 31, 41 and the dogs 32, 33, 42, 43 can be changed, depending on which of the head units 5A, 5B, 5C is mounted. , Stoppers 31, 41
By adjusting the mounting positions of the dogs 32, 33, 42, and 43, the work area W is appropriately maintained regardless of which type of head unit is mounted.

[0037]

According to the component mounter of the present invention, the head unit can be replaced with a different type for the head support member, so that the mounter main body can be used in common, and the common main body can be used. Various types of head units can be selectively attached. Moreover,
The guide member and the head support member are respectively repositioned with a stopper and a position detection member for regulating the Y-axis direction movement range of the head support member and the X-axis direction movement range of the head unit with respect to the head support member. Since the mounting is possible, an appropriate working area can be secured by adjusting the mounting positions of the stopper and the position detecting member according to the type of the head unit to be mounted.

[Brief description of the drawings]

FIG. 1 is a plan view showing a schematic configuration of a component mounter having a structure of the present invention.

FIG. 2 is a plan view showing an example of the entire structure of the component mounter.

FIG. 3 is a front view of the component mounter.

FIGS. 4A to 4C are explanatory views showing the arrangement of nozzle members of various types of head units.

FIG. 5 is a plan view of an essential part in a state where a second type head unit is mounted on a mounting machine.

FIG. 6 is a front view of a main part in a state where a second type head unit is mounted on a mounting machine.

FIG. 7 is a perspective view of a guide member and the like including a structure for adjusting a movement range in the Y-axis direction.

FIG. 8 is an enlarged plan view of a main part showing a structure for adjusting a movement range in the Y-axis direction.

FIG. 9 is a perspective view of a head support member and the like including a structure for adjusting a movement range in the X-axis direction.

[Explanation of symbols]

 Reference Signs List 1 base 5, 5A, 5B, 5C head unit 7 guide member 10 head support member 21, 22, 22 ', 26 nozzle member 31, 41 stopper 32, 42 origin dog 33, 43 limit dog 36, 37, 38, 46, 47, 48 Mounting hole

Claims (1)

(57) [Claims] 1. A guide member provided on a base in a Y-axis direction, a head support member movably supported by the guide member in the Y-axis direction, and moving the head support member in the Y-axis direction. A component comprising a drive mechanism, a component mounting head unit supported by the head support member so as to be movable in the X-axis direction, and a drive mechanism for moving the head unit relative to the head support member in the X-axis direction. In the mounting machine, the head unit can be replaced with a different type with respect to the head support member, and the guide member and the head support member have a Y-axis direction moving range of the head support member and the head support member. A component mounting, wherein a stopper for restricting a movement range of the head unit in the X-axis direction and a position detecting member are mounted so that their positions can be changed. Machine movement range adjustment structure.