JP3662546B2 - Component mounting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a component mounting apparatus for automatically mounting various components such as electronic components on a printed circuit board.
[0002]
[Prior art]
In general, in an electronic component mounting apparatus, a large number of component supply units are mounted in parallel on a component supply table, and the component supply table is moved in the parallel direction of the component supply unit at the time of component mounting. The component supply means is sequentially positioned at a predetermined component supply position, and the components of the component supply means are picked up and taken out by the mounting head unit, and transferred to the circuit board positioned at the circuit board positioning unit to mount the component. It is configured.
[0003]
A conventional component mounting apparatus of this type will be described with reference to FIG. 5 showing a perspective view and FIG. 6 showing a schematic plan view. In FIG. 5, a board positioning portion 4 for positioning the circuit board P supplied from the board supply means 2 at the mounting position is disposed at the front portion of the apparatus main body 1. The circuit board P on which required components are mounted is discharged by the board discharging means 3. On the other hand, a component supply unit 7 is disposed at the rear portion of the apparatus main body 1. Between the component supply unit 7 and the board positioning unit 4, as shown in FIG. A portion 8 is provided.
[0004]
The component supply unit 7 is provided with two component supply tables 10 and 11 that can move independently on the guide rail 9 in the left-right direction. Each component supply table 10 and 11 includes a large number of components. The supply means 12 is mounted in parallel along the moving direction of the supply tables 10 and 11. As this component supply means 12, what is generally called a parts cassette is shown in figure, and it demonstrates easily below. That is, electronic components of the same type are accommodated on the carrier tape at equal intervals and wound on the reel 13 while being covered with the cover tape, and the carrier tape is unwound from the reel 13 and has a pitch equal to the component accommodation interval. And the cover tape is wound up so that the electronic component at the foremost end is positioned at the component supply position A facing the component suction head 14 of the mounting head portion 8.
[0005]
In addition, as shown in FIG. 6, the mounting head unit 8 includes a plurality of component suction heads 14 arranged at equal angular intervals on the same circumference of a rotary table (not shown) provided to be rotatable about a vertical axis. It is provided. Each of the component suction heads 14 sucks the components by the vacuuming means, and is stopped sequentially at the component supply position A and the component mounting position B by intermittently rotating the rotary table, and the component supply means The parts are received from 12 and the parts are mounted on the circuit board P in parallel. In addition, while the one component supply table 10 is supplying the components, the other component supply table 11 evacuated to the standby position replaces the component supply means 12 and replenishes the components, so that the component mounting apparatus can be used without taking a rest. Prepare to be operational.
[0006]
[Problems to be solved by the invention]
In recent years, the types of circuit boards P to be produced and the types of components to be mounted on the circuit boards P tend to increase. On the other hand, it is conceivable to increase the number of component supply means 12 mounted on the component supply tables 10 and 11, but in this case, each component supply table 10 and 11 increases with the increase in the number of component supply means 12 mounted. Therefore, the entire length of the component supply unit 7 becomes very long, the space utilization efficiency deteriorates, and the productivity per floor area decreases.
[0007]
A more important problem is that the component supply tables 10 and 11 are pitch-fed in accordance with the removal of the component by the mounting head unit 8, and the following inconvenience occurs. That is, when the weights of the supply tables 10 and 11 increase as the length increases, not only a large driving force is required to move the component supply tables 10 and 11, but also the component supply tables 10 and 11 Since the inertial force is increased, the vibration when the supply tables 10 and 11 are pitch-fed significantly increases. Therefore, it is impossible to increase the speed of component supply, that is, component mounting operation.
[0008]
The present invention, the number of components to be mounted on the board even if it becomes large, without the entire apparatus is increased in size, and to provide a component mounting apparatus which can achieve the speed of the parts mounting operation It is for the purpose.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the component mounting apparatus of the present invention is mounted so that a substrate positioning unit for conveying a substrate and positioning the substrate and a plurality of component supply means are arranged in parallel in the substrate conveying direction. A pair of component supply tables fixedly installed on both sides of the component, and an XY moving type first mounting head unit that adsorbs the components on one component supply table and then mounts the components on the positioned substrate And an XY movement type second mounting head portion for attaching the component to the positioned substrate after adsorbing the component of the other component supply table, the first mounting head portion and the second mounting head portion mounting head unit, radial with respect to the rotating body such that at least four suction nozzle is equal intervals on the rotating body is rotatable in a direction perpendicular to the horizontal axis around the substrate transfer direction The components are arranged so that the components are selectively picked up sequentially from the component supply table by rotating the rotating body by one pitch, and these components are sequentially mounted on the substrate. .
[0010]
As a result, since the component supply table is fixedly installed, it becomes irrelevant to vibration regardless of the number of component supply means mounted, and the mounting head portion is made up of a plurality of component suction nozzles arranged on the rotating body. Since it is a robot type that picks up multiple parts sequentially from the parts supply table and then installs each part to a specific location on the board, the rotary type can be used even when the number of parts mounted on the board increases. Compared with the conventional apparatus that pitch-feeds the component supply table to the mounting head portion, the component mounting operation can be remarkably accelerated.
[0011]
In addition, since the components can be mounted on the substrate positioned on the single substrate positioning portion by the first and second mounting head portions, the component mounting operation can be further accelerated.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0013]
FIG. 1 is a schematic plan view schematically showing a component mounting facility (component mounting line) according to an embodiment of the present invention. In the figure, a board transport path 21 extending from a board supply means 22 for supplying a board on which a component is mounted to a board discharge means 23 for discharging a board is disposed in the left-right direction. Stand component mounting apparatuses 27A to 27D are arranged. Since these component mounting apparatuses 27A to 27D basically have the same configuration, FIG. 2 showing a perspective view of the component mounting apparatus 27D as an example and a plan view of the operation mechanism portion are shown. This will be described below with reference to FIG.
[0014]
In FIG. 2, the component mounting apparatus 27 </ b> D has a pair of left and right inverted U-shaped support frames 29 arranged side by side along the transport path 21 so as to penetrate the board transport path 21. In between, the two operation frames 30 are arranged in parallel with each other and are supported so as to be individually movable in the orthogonal direction with respect to the transport path 21. An XY movement type mounting head portion 31 is attached to each operation frame 30 so as to be movable along the operation frame 30. The mounting head portion 31 is attached to a rotating body 32 that is rotatable about a horizontal axis. The component suction nozzles 33 are arranged at equal intervals (90 ° intervals), and the rotating body 32 rotates at the same pitch as the interval of the component suction nozzles 33, so that each component suction nozzle 33 is alternatively selected. The components 34 are sequentially directed downward to pick up the components 34 from the component supply table 28 </ b> A, or the components 34 are mounted on the circuit board 37 of the board positioning unit 24.
[0015]
Between the support frames 29, the component supply table 28A is moved by the casters 40 and inserted from both the front and rear sides, and then fixedly installed at a predetermined position. This component supply table 28A is provided with the component supply means 12 comprising the above-described parker set including the reel 13. In addition to this, as shown in FIG. A component supply table 28B mounted with a stick-shaped component supply means 38 sent to the take-out position, a component supply table 28C mounted with a bulk component 39, and a tray-shaped component supply table 28D are installed in each of the component mounting units 27A to 27D. The The tray-like component supply table 28D is provided with a mounting head portion 59 in the form of a rotating arm for taking out these components.
[0016]
In FIG. 3, a head positioning mechanism unit 41 that moves the mounting head unit 31 in the direction along the substrate transport path 21 (X direction) is housed in the operation frame 30. The head positioning mechanism 41 includes a ball screw 43 that is spanned between a pair of support plates 42 fixed to both ends of the operation frame 30 and is rotatably supported, and the ball screw 43 is connected via a connecting means 44. A step motor 47 that is driven to rotate, and a moving body 49 that is moved by the rotation of the ball screw 43 with a nut 48 into which the ball screw 43 is screwed fixed. The mounting head unit 31 is fixed to the moving body 49 via a head holder 50, and the head holder 50 includes an existing head vertical movement mechanism unit 51 that moves the mounting head unit 31 up and down.
[0017]
Each support frame 29 accommodates a head transfer mechanism 52 that moves the head positioning mechanism 41 in the orthogonal direction (Y direction) with respect to the substrate transport path 21 via the operation frame 30. The head transfer mechanism 52 includes a ball screw 54 spanned between a pair of support plates 53 fixed to both ends of the support frame 29 and rotatably supported, and the ball screw 54 via a connecting means 55. Between the support plate 53 and a stepping motor 56 that is rotationally driven, a moving body 57 that is screwed to the ball screw 54 and fixed to one end of each operating frame 30, and moves the operating frame 30 by the rotation of the ball screw 54. It is constituted by a guide shaft 58 that is bridged and fixed and slidably supported by penetrating the other end of the operating frame 30.
[0018]
Next, the operation of the component mounting facility will be described with reference to the flowchart of FIG. In each of the component mounting apparatuses 27 </ b> A to 27 </ b> D, when one mounting head unit 31 sucks the component 34 from the component supply tables 28 </ b> A to 28 </ b> D, the other mounting head unit 31 mounts the component 34 on the circuit board 37. Although being controlled, both the mounting head portions 31 perform the same operation only by shifting the operation timing, so the operation of one mounting head portion 31 will now be described.
[0019]
First, the mounting head portion 31 is moved and positioned to a position directly above the component 34 to be sucked in the component supply tables 28A to 28D (step S1). That is, when the step motor 47 of the head positioning mechanism 41 rotates in a required rotation direction by a required angle, the moving body 49 is moved in the direction along the substrate transport path 21 by the ball screw 43 that rotates integrally with the step motor 47. The mounting head unit 31 is moved to a predetermined component extraction position in the component supply tables 28A to 28D. Here, the component supply tables 28 </ b> A to 28 </ b> C other than the tray-shaped component supply table 28 </ b> D are positioned in a straight line along the board conveyance path 21, so that they face the mounting head portion 31. The mounting head unit 31 is positioned at that position and does not move until there are no parts cassettes or sticks.
[0020]
When the mounting head portion 31 is positioned, the head vertical movement mechanism portion 51 operates to lower the mounting head portion 31, the component suction nozzle 33 sucks the component 34, and then the head vertical movement mechanism portion 51 mounts it. The head part 31 is slightly raised (step S2). Subsequently, the rotating body 32 of the mounting head portion 31 is rotated by one pitch, and the next component suction nozzle 33 is opposed to the component extraction position (step S3). Here, it is determined whether or not the mounting head portion 31 has finished sucking a predetermined number (four in this example) of the components 34 (step S4). Is repeated to suck a predetermined number of parts 34.
[0021]
When the suction of the predetermined number of parts 34 is completed, the step motor 56 of the head transfer mechanism unit 52 and the step motor 47 of the head positioning mechanism unit 41 are simultaneously driven, and the mounting head unit 31 is rotated by the rotation of the ball screw 54. It is moved onto the board positioning unit 24 via the operating frame 30 and positioned right above a predetermined component mounting position on the circuit board 37 by the head positioning mechanism unit 41 (step S5). Next, the head up-and-down moving mechanism 51 is driven and the component that has been sucked and held by the component suction nozzle 33 is mounted on the circuit board 37 (step S6). After the mounting head unit 31 is lifted slightly by the head vertical movement mechanism unit 51, the mounting head unit 31 is moved to the true position of the next component mounting position on the circuit board 37 by the operation of the head positioning mechanism unit 41 and the head transfer mechanism unit 52. The rotating body 32 is rotated by one pitch and the component to be mounted next is opposed to the component mounting position (step S7).
[0022]
Here, it is determined whether or not the mounting of all the components 34 held by the mounting head unit 31 has been completed (step S8). If not completed, the same operation as described above is repeated. All the components 34 are mounted at predetermined positions on the circuit board 37.
[0023]
Next, it is determined whether or not the mounting of all the components 34 shared by the component mounting apparatuses 27A to 27D with respect to the circuit board 37 positioned in the board positioning unit 24 is completed (step S9), and the process ends. If not, the mounting head portion 31 is moved again onto the component supply tables 28A to 28D, and the component 34 is sucked from the component supply tables 28A to 28D and the component 34 is applied to the circuit board 37 in the same manner as described above. This mounting operation is repeated until the mounting of all the components 34 to the circuit board 37 is completed. When the mounting of all the components 34 to the circuit board 37 is completed, the circuit board 37 positioned on the board transfer path 21 is transferred by a predetermined pitch, and the board positioning unit in the component mounting apparatuses 27A to 27D in the next process. 24 (step S10), and the same operation as described above is repeated.
[0024]
In the component mounting facility, different components can be mounted on the component supply tables 28A to 28D of the plurality of (four in this example) component mounting apparatuses 27A to 27D arranged side by side along the board transfer path 21. When the types and number of components 34 to be mounted on the circuit board 37 increase, the components are divided into the component supply tables 28A to 28D and mounted as a group in which these components are classified for each type. 28A-28D only mounts the component 34 of only the group, so that it does not increase in size, and the component supply tables 28A-28D in the component mounting apparatuses 27A-27D are installed in a direction orthogonal to the substrate transport path 21. Therefore, the entire equipment is not increased in size so as to protrude largely in the direction of the substrate transfer path 21.
[0025]
Further, only the mounting head portion 31 of each of the component mounting apparatuses 27A to 27D is operated, and the component supply tables 28A to 28D are fixedly installed. It becomes irrelevant to vibration. Further, the mounting head unit 31 sucks a plurality of components 34 from the component supply tables 28 </ b> A to 28 </ b> D at a time, and then sequentially mounts the components 34 on predetermined positions on the circuit board 37. Further, each of the component mounting apparatuses 27A to 27D is provided with a pair of mounting head portions 31, and when one of the components mounts the component 34, the other component 34 is controlled to be attracted to the circuit board 37. Yes. As a result, even when the types and number of components 34 to be mounted on the circuit board 37 increase, the component mounting is compared with the configuration in which the component supply table is pitch-fed to the rotary mounting head portion as in the conventional device. The operation can be made much faster.
[0026]
On the other hand, when the number of types of circuit boards 37 increases, a part of the component supply tables 28A to 28D respectively installed in the component mounting apparatuses 27A to 27D is supplied as a part with the required part 34 mounted thereon. This can be done by simply changing to the tables 28A to 28D. Of course, the component mounting apparatuses 27A to 27D can be used as a single unit.
[0027]
【The invention's effect】
According to the present invention, even when the number of components to be mounted on the board increases, the component mounting operation can be speeded up without increasing the size of the entire apparatus .
[Brief description of the drawings]
FIG. 1 is a schematic plan view schematically showing a component mounting facility according to an embodiment of the present invention.
FIG. 2 is a perspective view of an embodiment of a component mounting apparatus according to the present invention which is a part of the equipment.
FIG. 3 is a plan view of an operating mechanism portion of the apparatus.
FIG. 4 is a flowchart of the apparatus.
FIG. 5 is a perspective view of a conventional component mounting apparatus.
FIG. 6 is a schematic plan view of the apparatus.
[Explanation of symbols]
12, 38 Component supply means 21 Substrate transport means 22 Substrate supply means 23 Substrate discharge means 24 Substrate positioning portions 27A to 27D Component mounting devices 28A to 28D Component supply tables 31, 59 Mounting head portion 33 Component suction nozzle 34 Component 37 Substrate 41 Head Positioning mechanism 51 Head vertical movement mechanism 52 Head transfer mechanism

Claims (1)

A pair of component supplies that are mounted so that a substrate positioning unit that conveys the substrate and positions the substrate and a large number of component supply means are arranged in parallel in the substrate conveyance direction and are fixedly installed on both sides of the substrate positioning unit After adsorbing the table and the components on one component supply table, after adsorbing the first mounting head portion of the XY movement type that mounts this component on the positioned substrate, and the components on the other component supply table, An XY movement type second mounting head portion for mounting the component on the positioned substrate, and the first mounting head portion and the second mounting head portion are horizontal axes in a direction perpendicular to the substrate transport direction. At least four component suction nozzles are arranged radially with respect to the rotating body so as to be equidistant from each other on the rotating body that can rotate freely. Goods components from the feed table to alternatively sequential adsorption, and component mounting apparatus characterized by these components are configured to sequentially mounted on the substrate.

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