JPH04148597A - Electronic component installing device - Google Patents

Abstract

PURPOSE:To support a rotary table without occupying large space by forming a round hole, which opens at the center of one end face, in the rotary table, and supporting, at the inside periphery of the round hole, the rotary table capably in rotation with a supporting member through a bearing. CONSTITUTION:A supporting base has a disc part 36 with a large diameter and an axis part 38 with a small diameter, which is extended out of the bottom of the disc part 36, and is fixed to a base plate 22 at the axis part 38. These base plate 22 and supporting base 32 constitute a supporting member. Moreover, a rotary table 34 is disc-like, and a round hole 40 with a bottom, which opens at the bottom, is made, and at the bottom wall 42, it is set on a coupling shaft 24, and at the inside periphery 44 of the round hole 40, it is set on the disc part 36 of the supporting base 32 capably in rotation and axial shifting through bearings 46 and 48. These bearings 46 and 48 bear both radial load and thrust load, and the rotary table 34 is supported from below by the supporting base 32.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electronic component mounting device, and in particular,
This relates to supporting a rotary table that holds a component mounting head.

Conventional technology A device for mounting electronic components onto a circuit board such as a printed circuit board has multiple component mounting heads attached to a rotating chiffle.
Some devices move a plurality of component mounting heads to a component supply position and a component mounting position by rotating a rotary table. This type of electronic component mounting device includes (a) a rotary table that is generally disk-shaped and has a plurality of component mounting heads attached to one circumference around its axis;
(C) a rotary drive device that rotates the rotary table and stops the plurality of component mounting heads one by one at a component supply position and a component mounting position; (d) A board support device that supports the circuit board and positions it at a component mounting position. Each of the plurality of component mounting heads receives and picks up electronic components at the component supply position, and mounts them on the circuit board at the component mounting position.In this way, for example, electronic components can be supplied and mounted at the same time. Various effects such as improved mounting efficiency can be obtained.

The electronic component mounting apparatus described in Japanese Patent Publication No. 63-59559 is one example. In this mounting device, a rotary shaft is attached to the frame so as to be rotatable around a vertical axis, and a rotary table is fixed to the lower end protruding from the frame, so that the rotary table can be rotated by rotating the rotary shaft. It has become. The rotary table itself is not directly supported by the frame, but is supported via a rotating shaft.

Problems to be Solved by the Invention However, in order to support the rotary table with high rigidity so as not to generate vibrations, it is necessary to make the rotary shaft long and to have both ends separated in the axial direction supported by a frame. Therefore, one side of the rotary table in a direction parallel to the rotation axis is occupied by the rotary shaft, which reduces the degree of freedom in arranging peripheral members and causes problems in that the device becomes large.

The first invention has been made with the object of providing an electronic component mounting device that can support a rotary table without occupying a large space.

The second invention has been made with the object of providing an electronic component mounting device that can support a rotary table without occupying a large space in a manner different from the first invention.

Means for Solving the Problems The first invention provides the above-mentioned (a) in order to solve the above problems.
In an electronic component mounting apparatus including a rotary table, (b) a rotary drive device, (C) a component supply device, and (d) an M-plate support device, a circular hole opening in the center of at least one end surface is formed in the rotary table. Additionally, the rotary table is rotatably supported by a support member via a bearing on the inner peripheral surface of the circular hole.

The electronic component mounting device according to the second aspect of the invention is characterized in that the rotary table is rotatably supported on the outer peripheral surface of the rotary table by a support member via a bearing.

Working rotary tables typically have a fairly large diameter due to the need to support a plurality of mounting heads around the outer periphery. Therefore, when the rotary table itself is supported by the frame, it can be supported at a large distance in the diametrical direction, and when supporting a rotating shaft, it can be supported at a large distance in the axial direction. Even without,
It can be supported with sufficient rigidity. Of course, when the rotary table is supported on the outer peripheral surface as in the second invention, but even when the rotary table is supported on the inner peripheral surface of the circular hole as in the first invention, the diameter of the rotary table itself is large. A circular hole can be formed, and the rotary table can be firmly supported over a short distance in the axial direction.

Effects of the Invention Therefore, in both the electronic component mounting devices of the first invention and the second invention, either side of the rotation table in the direction parallel to the rotation axis is occupied by the long rotation shaft and the bearing device that supports it. This makes it possible to easily arrange the constituent members of that part.

Embodiments Hereinafter, embodiments of the first invention will be described in detail based on the drawings.

In FIGS. 2 and 3, 10 is a base. On this base 10, an X-axis part and pull 12 that move in the X-axis direction (left and right direction in FIG. 2) are provided, and on the X-axis part-pull 12, there is an A Y-axis bull 14 that moves in the Y-axis direction is placed. A device (not shown) for positioning and supporting the printed circuit board 16 is provided on the Y-axis section bull 14, and the printed circuit board 16 is moved by the movement of the X-axis section bull 12 and the Y-axis section bull 14. , the electronic component mounting locations are sequentially positioned at the component mounting positions. X-axis section - bull 12. The Y-axis portion bull 14 and a positioning support device (not shown) constitute a substrate support device. Although not shown, a printed circuit board loading conveyor and a printed circuit board unloading conveyor are provided on both sides of the base 10 adjacent to the substrate support device in the X-axis direction, and the printed circuit board 16 is moved along the X-axis. The substrate is conveyed in the same direction, is supplied to the substrate support device, and is also discharged.

In addition, a pair of support walls 2 are provided on the base 10 at a position adjacent to the printed circuit board loading/unloading conveyor in the Y-axis direction.
0 is set. These supporting walls 20 are connected to the base 10
are provided in two locations separated in the X-axis direction, each extending in the Y-axis direction, and a base plate 22 extends in the X-axis direction at a portion a short distance above the printed circuit board 16. .

As shown in FIG. 1, the base plate 22 is connected to a cover 28 constituting a housing 26 fixed to the upper end of the support wall 20 by a connecting shaft 24 disposed in the vertical direction. The connecting shaft 24 has its upper and lower ends fixed to the base plate 22 and the cover 28, respectively, so that the base plate 2
2 has increased vertical rigidity.

A rotary table 34 is mounted on the base plate 22 via a support stand 32. As shown in FIG. 1, the support base 32 has a large-diameter disk portion 36 and a small-diameter shaft portion 38 extending from the lower surface of the disk portion 36. It is fixed at 22. In this embodiment, the base plate 22 and the support base 32 constitute a support member. Further, the rotary table 34 has a disk shape, and a bottomed circular hole 40 is formed in the lower surface thereof, and a bottom wall 42 is formed.
The connecting shaft 24 is fitted in the circular hole 40 .
The bearing 4 is attached to the disc portion 36 of the support base 32 on the inner peripheral surface 44 of the support base 32.
6 and 48, and are fitted so as to be rotatable and immovable in the axial direction. These bearings 46 and 48 receive both radial load and thrust load, and the rotary table 34 is supported from below by the support base 32.

A plurality of component mounting heads 54 are arranged on the peripheral wall 52 of the rotary table 34 on one circumference centered on the axis of the rotary table 34.
are attached at equal angular intervals (see Figures 2 and 3).
In the figure, only the mounting position of the component mounting head 54 is shown by a two-dot chain line). The main body 56 of the component mounting head 54 (hereinafter referred to as the head main body 56) has a cylindrical shape, and is fitted into the peripheral wall 52 so as to be slidable and rotatable in the vertical direction, and has a suction nozzle 58 at its lower end. is installed. The suction nozzle 58 includes a cylindrical nozzle body 60 fitted to the head body 56 and a suction tube 62 fitted to the nozzle body 60 so as to be slidable in the axial direction.

The suction tube 62 is urged to protrude from the nozzle body 60 by a spring 64, and the limit of its protrusion is defined by a stopper 66. In addition, the adsorption tube 6
2 is a passage 68.2 within the nozzle body 60. Passage 70 within head body 56. Directional switching valve 721 Passage 749 formed in the rotary table 34 Rotary valve 76 fixed to the rotary table 34 and rotatably fitted to the connecting shaft 24
, is connected to a vacuum source (not shown) via a passage 77 provided in the connecting shaft 24. The rotary pulp 76 remains in the passage 7 in the connecting shaft 24 even when the rotary table 34 rotates.
7, and a passage 7 formed in the rotary table 34 by a hose (not shown).
Connected to 4. The directional switching valve 72 switches the adsorption tube 62 between a state in which it is communicated with a vacuum source and a state in which it is communicated with the atmosphere.
Separately, a cam mechanism (not shown) provided at a fixed position operates as the rotary table 340 rotates, and the suction tube 62 is connected to a vacuum source to suction the electronic components and communicated with the atmosphere. Let go and let go. In addition,
The directional switching valve 72 may be switched by a solenoid actuator instead of the cam mechanism.

Further, a light emitting plate 78 is attached to the suction tube 62, and is configured to receive ultraviolet rays and emit visible light when the suction nozzle 58 detects the holding position of the electronic component. A device for detecting this holding posture is disclosed in Japanese Patent Application No. 1999 of the applicant.
It is the same as the detection device described in the application No. 46255,
Explain briefly. The detection device has a ring lamp that emits ultraviolet light upward, and the light emitting plate 78 of the component mounting head 54 positioned at the holding posture detection position absorbs this ultraviolet light and directs visible light toward the electronic component. radiate. As a result, a clear projected image of the electronic component is formed on the solid-state image sensor surface of the imaging device provided in the detection device, and the imaging device converts this projected image into a binary signal and outputs it to the control device. The control device compares the binary signal with a binary signal indicating the proper holding posture of the electronic component, and calculates the angular error Δθ and center position errors ΔX and ΔY around the center line of the electronic component.

The upper end of the component mounting head 54 is fitted into the bracket 80 so as to be slidable and rotatable in the axial direction, and a spring 82 fitted into the end protruding from the bracket 80
is forced upward by. A guide rod 83 extending downward is attached to the bracket 80 and is fitted to the rotary table 34 so as to be slidable in the axial direction, and guides the elevation of the component mounting head 54. A roller 84 is also attached to the bracket 80 so as to be rotatable around an axis extending in the radial direction of the rotary table 34, and is engaged with a cam groove 88 of a three-dimensional cam 86. The three-dimensional cam 86 has a cylindrical shape, is fixed to the lower surface of the housing 26, and has a cam groove 88 formed on its outer peripheral surface. As shown in FIGS. 2 and 3, the cam groove 88 has a height that gradually changes in the circumferential direction.
As will be described later, when the rotary table 34 is rotated, the roller 84 moves within the cam groove 88, and the component mounting head 54 is at a position where the suction tube 62 is lowered from the base plate 22.
It is raised and lowered between a position above the base plate 22. This is because the base plate 22 is provided above the printed circuit board 16, and in order for the component mounting head 54 to mount electronic components on the printed circuit board 16, it is necessary to descend from the base plate 22. In the example, the position where the plurality of component mounting heads 54 are closest to the printed circuit board loading conveyor and the printed circuit board carrying out conveyor is defined as the component mounting position, and the cam groove 8
8 is formed so that the component mounting pad 54 is located at the lowest position at this position. In addition, the dimensions of the base plate 22 in the Y-axis direction are as shown in FIG.
It is set to a size that does not interfere with the descent of step 4. Furthermore, a position that is 180 degrees apart from the component mounting position and where the component mounting head 54 is the highest is defined as a component supply position, and a component supply device 90 (
(see Figure 3). Note that a position for detecting the holding posture of the electronic component by the suction nozzle 58 and an angular error correction position for correcting the angular error Δθ are respectively provided between the component mounting position and the component supplying position.

A table drive motor 94 is housed within the three-dimensional cam 86. Since the rotary table 34 is rotatably supported on its inner peripheral surface 44, there is space above it.
A table drive motor 94 can be provided. This table drive motor 94 has a rotor 102 provided outside a stator 96 via a bearing 98.degree. 100, and is fixed to the cover 28 of the housing 26 at a support plate 104 that supports the stator 96.

Further, a plurality of retaining pins 106 are provided on the lower surface of the rotor 102.
is provided in a protruding manner and is fitted to the bottom wall 42 of the rotary table 34 so as to be relatively movable in the axial direction but not rotatable. Therefore, the rotary table 34 is rotated by the rotation of the rotor 102, and the plurality of component mounting heads 54 are sequentially moved up and down to the component supply position.

The holding posture detection position, the angle error correction position, and the parts bag loading position are moved. The table drive motor 94 constitutes a rotational drive device. Note that 108 is a rotation angle detector of the table drive motor 94, and the rotation position of the rotary table 34 can be determined based on the detection of the rotation angle.

In the electronic component mounting apparatus configured as described above, after the component mounting head 54 receives and picks up the electronic component at the component supply position, the angle error Δθ and center position errors ΔX and ΔY are detected at the holding posture detection position. . The center position errors ΔX and ΔY are corrected by correcting the movement position of the printed circuit board 16, and the angular error Δθ is corrected at the angular error correction position. A rotating member is engaged with the upper end of the head body 56 and rotated by a predetermined amount for correction.

After the correction, the component mounting head 54 is moved to the component mounting position, and the elevating member provided at that position is lowered to lower the head body 56, and the electronic component is placed on the printed base machine 6. Ru. And the adsorption tube 62
After the suction of the electronic components by the head body 56 is released, the head body 56
is raised, and by the rotation of the rotary table 34, the component mounting head 5 mounts the electronic component onto the printed circuit board 16.
4 is positioned at the component mounting position.

As described above, in the electronic component mounting apparatus of this embodiment, since the rotary table 34 itself is supported by the base plate 22 and the support base 32, 4. The table drive motor 94 can be provided in the space created above, and the entire device can be configured compactly. Further, the rotary table 34 is supported by the inner circumferential surface 44 of the part to which the component mounting head 54 is attached.
The rotary table 34 can be supported with a shorter axial dimension than when supporting the inner circumferential surface of a portion of the rotary table 34 that is deviated from the mounting portion in the axial direction.

Furthermore, since the base plate 22 is provided above the printed circuit board 16 and the rotary table 34 is provided thereon, the movement of the printed circuit board 16 is not restricted by the rotary table or its supporting member, and the movement range is This makes it easier to mount electronic components.

An embodiment of the second invention is shown in FIG. In this embodiment, a support wall 20 erected on a base 10 is provided with a support stand 110 as a support member in the X-axis direction, and a disk-shaped rotary table 112 is provided at the center of the support wall 20 , and a bearing 116 is mounted on the outer peripheral surface 114 of the support stand 110 as a support member. , 118, and is supported rotatably and immovably in the axial direction. A table drive motor 120 is engaged with the upper surface of the rotary table 112 so as not to be relatively rotatable. Similar to the table drive motor 94 of the previous embodiment, the table drive motor 120 has a stator provided on the inner circumference side and a rotor on the outer circumference side, and is fixed to a housing 26 fixed to the support wall 20 on a support plate. On the other hand,
A retaining pin 124 erected on the lower surface of the rotor is fitted into the rotary table 112 to transmit rotation.

If the part of the rotary table 112 to which the component mounting head 54 is attached is supported from the outer circumferential side by the support stand 110 in this way, a space will be created on both the upper and lower sides of the rotary table 112, and the printed circuit board 16 can be placed freely under the rotary table 112. The table drive motor 120 can be disposed on the upper side.

Further, a component mounting head 5 is provided below the rotary table 112.
Since there is no member that interferes with the lowering of the component mounting head 4, there is no need to raise and lower the component mounting head 54 along with rotational movement in order to avoid interference with the base plate 22 as in the case of the previous embodiment, and the configuration of the apparatus is simplified. At the same time, the parts supply position, the parts bag loading position, and the holding posture detection position are determined.

It becomes easy to set the angle error correction position.

However, in this embodiment as well, for example, the installation heights of the printed circuit board and the electronic component supply device are different, and the position where the component mounting head 54 receives and takes electronic components from the electronic component supply device 3 and the position where the electronic components are mounted on the printed circuit board are different. If there is a difference in height from the position, the component mounting head 54 may be moved to the rotary table 1.
What is necessary is just to raise and lower with the rotational movement of 12.

In addition, in each of the above embodiments, the rotary table is 34 degrees 112 degrees.
are respectively provided with table drive motors 94 and 12.
Although the rotation of 0 is directly transmitted by the retaining pins 106 and 124, it may be transmitted via gears. For example, a large-diameter gear is fixed to the top surface of a rotary table, and a fixed pinion is engaged with the output shaft of a motor. In this case, the motor will be installed on the side of the rotary table in a position that allows it to rotate around the vertical axis. In this way, it becomes possible to arrange the necessary members for mounting electronic parts on the upper side of the rotary table separately from the table drive motor, or it is possible to make the apparatus compact without providing any members.

Further, the rotary table may be supported by extending the housing 26 fixed to the support wall 20 downward. In this case, either the inner peripheral surface or the outer peripheral surface of the rotary table may be supported.

In addition, the present invention can be implemented with various modifications and improvements based on the knowledge of those skilled in the art without departing from the scope of the claims.

[Brief explanation of drawings]

FIG. 1 is a front sectional view showing a rotary table and a rotary drive device of an electronic component mounting apparatus according to an embodiment of the first invention. FIG. 2 is a front view schematically showing the mounting device,
FIG. 3 is a side view. FIG. 4 is a front view (partially in section) of an electronic component mounting apparatus which is an embodiment of the second invention. 12. Parts supply device 94: Table drive motor 110: Support stand 112: Rotary table 114: Outer peripheral surface
116.118: Bearing 120: Table drive motor

Claims (2)

[Claims] (1) A rotary table that is generally disk-shaped and has a plurality of component mounting heads attached on one circumference around its axis, and the rotary table is rotated so that one of the plurality of component mounting heads is mounted. a rotary drive device that stops at a component supply position and a component mounting position, respectively; a component supply device that is provided at the component supply position and supplies electronic components to the component mounting head; and a component supply device that supports a circuit board and stops the component mounting head. an electronic component mounting device that mounts the electronic component supplied from the component supply device onto the circuit board supported by the board support device, the electronic component mounting device including a board support device that positions the electronic component at a position; 1. An electronic component mounting device comprising: a circular hole opening at the center of an end face; and a rotary table rotatably supported by a support member via a bearing on an inner circumferential surface of the circular hole. (2) A rotary table that is generally disk-shaped and has a plurality of component mounting heads attached on one circumference around its axis, and the rotary table is rotated so that one of the plurality of component mounting heads is mounted on the rotary table. a rotary drive device that stops each electronic component at a component supply position and a component mounting position; a component supply device that is provided at the component supply position and supplies electronic components to the component mounting head; and a component supply device that supports a circuit board and stops the component mounting head. an electronic component mounting device that mounts the electronic component supplied from the component supply device onto the circuit board supported by the board support device, the electronic component mounting device including a board support device for positioning the rotary table on its outer circumferential surface; An electronic component mounting device characterized in that the electronic component mounting device is rotatably supported by a support member via a bearing.