JPS59155200A - Device for mounting electronic part - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to an apparatus for constructing an electronic circuit by mounting electronic components, particularly leadless small electronic components (so-called chip components), on a substrate.

IcIJ Conventional technology One method for attaching small leadless solder parts to a board is to pick up the parts one by one with a mounting tod.
There are some things you can wear on the island. In this device, the sameness of the parts at the pick-up point is constant.

When you need to attach it to the board in various orientations.

It is necessary to rotate the component by some means until it is lowered onto the board. An example of a component rotation means for this purpose is the device proposed in Utility Model Application Publication No. 4275 of 1981. There is.This is a gear heating two specific station installed on the mounting head side that rotates all the way.
It has the advantage of being able to reduce the weight of the moving parts by placing the one-component rotating electric motor outside the mounting head support.In order for such a device to function well, it is necessary to ensure that the gears are always meshing correctly. You must make arrangements to meet. This is because if there is no such arrangement, the peaks of the interlocking line drawings may collide with each other, potentially damaging one mechanism.

4. Purpose of the Invention The present invention provides an L driven gear with an external source @ provided on the mounting head side.
It is an object of the present invention to provide a device in which the gears are meshed to transmit all the power for rotating parts, and the meshing of the gears is always performed according to national conditions.

B) Structure of the Invention In the present invention, there is a locking device that stops the rotation of the driven gear except during the meshing period of the driving gear. It is provided on the mounting head side so that even after the driven gear is separated from the driving gear and becomes free, it is properly engaged and the angle is maintained when it is time to engage again.

6. Embodiment Figure 2 (11 is an index table that rotates around a vertical axis. As seen in FIG. 2).

The index table ('') consists of an upper table (2) and a lower table (3), both of which are fixed to a vertical index shaft (41). (61
The indexing device body (7) is connected to the indexing device body (7) on the beam. The inside of the index shaft (4) is an intake passage 18) that communicates with a vacuum source (not shown). Now, the index table 11) rotates in steps of 45 degrees, and there are 8 stays around one V.
vxn width... Akebono is arranged, and eight arms (91) are made to protrude radially from the lower table (3) in accordance with this.The arms (9) are attached directly to the surface of the lower table +31. It is supported by the slider (1G) and is movable in the vertical direction.The slider (1 (l) is supported by the spring 0υ stretched between the upper table (2) and hits the stopper bolt 03 screwed into the upper table (21). The slider (101 protrudes outward and the π roller U
A-'yag with V is an adsorption stay Vw:
/(Tapetsu at 71) Receives the pressing action of 041.

Similar tappets are placed on the mounting station (■Other required station), and all of them are moved up and down by cam action.

The arm (9) supports the mounting head as+'e at its tip.

The mounting head 9 is hollow, and the upper end 12 is equipped with a hose (
+61 are connected, and the suction nozzle anw: is made to protrude from the lower end. The nozzle (In can be slid against the mounting head 051, but is always splashed 11811:
, being pushed into a more protruding position. The other end of the hose 11G is connected to a valve u9 fixed to the upper table +21.

The valve 119 is connected to the intake path (8) through a hose and is used to turn the suction force ON and OFF. The opening/closing operation of the valve 119 is performed by a lever-type actuator Ca1l having 4 two rollers at the tip. That is, when the actuator QllyI/is pushed down, the valve is open, and when not, the valve is closed. Actue'ri Qll
In the stay cylinder (1), the control of the stay cylinder (1) is based on the fact that the air cylinder 4 = Therefore, the cam which moves up and down is ≦2.
■ and h (■CM) Due to the cam that moves up and down with the air cylinder (2), the station + IC + II between them
When I+ (Jl is set to χ, the bearing part (fixed to 61) is fixed to the L/π cam. The cam 1261, which is fixed at 61, also serves as the @ support member of the air cylinder, and when the cam is lowered to L/π, the cam is almost continuous with the cam C8. Since each valve u9 is arranged in a lagging position with respect to the mounting head (15+) to which it belongs, the cam 6 is also in a position offset from the station to which it belongs.

The surface is a carrier tape for supplying parts arranged on the STacylon (10).The tape surface is made by dropping 71 flat hexahedral parts (2) into through holes punched at regular intervals in a cardboard base, one on each side. It is sealed with a plastic film, and only the film on the top side is peeled off just before the suction position.On the other hand, the station board IVI is loaded with the substrate ■, the rX-Y table cIυ is arranged, and the stage ,
A parts collection box (2) is placed in the main compartment. S@ is a device for determining the posture of parts, which is placed in the station system (■). This is made up of a photocoupler and is placed at a height where its optical path crosses directly below the successfully picked up component.

Now, the mounting head is set to 0 and the driven gear cn'v is fixed.

The arm (9) has a built-in bar-shaped wedge that engages between the teeth of the driven gear (b), and the wedge (to) is always pressed against the driven gear diagram by the elastic force of the spring (631). The wedge (toward) has an arm (9): 2. Fixes the trigger Cq that protrudes upward from the window bolt.A As seen in Fig. 6, the mounting station +■2 is the tappet that pushes the roller 03. The tappet (end) is suspended from the beam (5) and is supported by a bracket (end), and a link collar connected to a cam (not shown) moves it up and down.The end block of the tappet has a The bell crank (4) that moves the trigger (cut) is pivoted.The bell crank (4) is biased by the spring (c) in the direction of pulling the trigger @, but the bracket (
The upper end of the rod (G) is also supported on the bracket (H), and the T-bell crank (C) is
The other end of the bell crank (c) hangs down through the beam (5) and is connected to the bracket joint of the bearing tube MG. The support structure of the bearing tube is shown in FIGS. 9 to 11. First, a paste is fixed to the upper surface of the beam (51). A matching slider Ilv is attached.The slider has a row of rollers between the two parts so that it moves smoothly in the linear direction, but exhibits high rigidity against torsion in other directions. , upper surface C; deck r4 is fixed.

One side of the deck A protrudes from the slider, and a pulse motor Q is attached thereto via a support leg. The shaft of the pulse motor 6 is connected via a gear-shaft coupling a)1 passing through the bushing. Bearing tube t
46 fixes the upper end to the deck mark, and then passes through the pace (goods) and eem t51 C drilled π long hole @ and pushes it out downward. A driving gear (to) which is axially fixed to the gear protrudes from the lower end. The driving gear is the driven gear (b).
They are long vertically so that they engage with each other during the lifting and lowering strokes to maintain the Y position.

A5'i) is an air cylinder attached to the deck group directly above the slider, and the piston rod is connected to the bracket (g) fixed to the beam (5).

It works by pushing the deck ■ towards the center of the index table (【1. ) is screwed into the stopper bolt tet+v that limits the movement of the gear (6) and the deck (2) is constantly pulled in a direction that separates the driving gear (2) from the driven gear (2) by a spring stretched between it and the base.

I will explain the next two areas. , Figures 4 and 5 show the behavior of the mounting head t+51 at station ll3(V)IV+t■ at a specific point in time. It is shown as π. , FIG. 2 corresponds to '@4, and FIG. 3 corresponds to FIG. 5. Fourth
The figure shows a state in which each mounting head 051 has moved from the previous stage and is currently in the process of being placed. Inside the station, the cam (2) is still in the raised position.

Is the attached head 9 suction? Not started. At station 11) 1m) (Vl), the valve 119 of the mounting head 051 located at Vl is in the open state due to the action of the cam ■, and one component (281) is suctioned and held. Inspect the posture of the component.If it is attracted in the normal posture as shown in the figure, it is determined that there is no problem because the component ■ will not cast a shadow on the photocoupler's light beam.Station IVI (Vl+) is in the descending state, and the attached RAD 051 is exerting a suction force. Next to this state, the operation shown in Fig. 5 occurs.
1 (I is pushed down and the nozzle of the mounting head 115 is turned on.
is the same as the parts. After exactly π, the cam descends and starts attracting the nozzle On. At the station (■, the slider (1) descends and presses the suctioned part 1 against the board ■.Then the cam (2) rises and cuts off the suction of the 1 part (6 parts @). At the starting or ending point trlIVf, the slider (10) of the station 11) IV) rises and each mounting head U51 starts moving to the next station. In order to avoid complete suction interruption, the cam Q51 immediately descends and waits after the rise of the slider (1).On the other hand, the cam 3J is pressed and the actuator Q
The cram school went up after the cam□□□'s second shift.

Waiting for the next actuator tzny. If the part is attracted to the side, that is, in a standing position, it will block the light beam of the attitude determining device Q, and it will be determined that the attitude is abnormal. The mounting head 051 for which this determination was made is 1
Next, when moving to the stage tube (V), no descending operation is performed. The cam 5 also has this installation heptalpha as a stay shield (■
(The device maintains its descending state on the east side of the second move, and continues suction.
Y! l - When it is cut off - the suction is cut off by various parts 1 part + 281
Drop it into collection box Q.

If even the subsequent mounting heads have an abnormal suction posture, the mounting head 115 remains in the position of
1 will not be cut off, but in this case, when the retention period ends and movement starts, the actuator 71
1 is cam f251! When the parts are separated, the suction is released and the parts are dropped into a one-layer collection-resistant box.

The following operations are performed in the above (-in addition to mounting station IV). Equipment head (+51 is stationary (V+-
2. At the time of arrival, the bearing opening is in the 6th position, and both the driving gear and the bellcrank station are in the driven gear (toward) position.
and the trigger is located away from the trigger. At this point, the air cylinder (b) is activated, and the Deck Team moves from the position shown in Figure 9 to the 10th position.
Move to the position shown in the figure, and the driving gear (to) meshes with the driven gear as shown in Figure 7. f: Due to the movement of the bearing tube, the bell crank rotates and pulls up the rod ■. The unbound bellcrank proboscis is pulled by the spring (G) and rotates, and the trigger @ is pulled to remove the wedge l3Bv from the driven gear (B). Thereafter, as shown in FIG. 8, the tappet descends and pushes down the slider u1. If the part to be installed now requires a direction change Y, the required number of drive pulses will be applied to the pulse motor while the first part reaches the board ω, and the driving gear will rotate the required angle. to change the direction of the mounting head 051. After the parts are installed, the tappet (to) rises first, and then the driving gear (to) disengages.

Here, one part (glue is the first!1.
If the tip of the nozzle 071 is cut along the outer circumferential curved surface of the part (2 pieces),
After the nozzle 0η leaves the part +281 y, until the drive gear (to) leaves, the drive gear (to) rotates again! and return the nozzle 07iY to the orientation when picking up the component. When the driving gear ζ, which returns the deck to its old position after the arm (9) has completed its ascent, is about to leave the driven gear, the bell crank H2 is moved by the rod 2, as shown in the figure. However, since the driven gear (1) meshes with the driving gear (2) and is locked in that state, the first engagement is completely guaranteed. Driving gear
Regarding, the πth, ta connected to the pulse motor
The tip will not turn in a direction that deviates from the engaged position.

Is this example a part? In this example, the direction of the component is changed by rotating the nozzle itself for suction, and the mounting head is equipped with component clamping claws that are separate from the nozzle. It goes without saying that the present invention can also be applied to devices in which the orientation of parts is changed by twisting.

(F) Effects of the Invention In the present invention, a mounting head for holding one part in its entirety is connected to a driven gear, and this driven gear is rotated by a driving gear disposed on a specific station to change the mounting direction of the part.
Since the rotation of the driven gear is locked during the period when the driving gear does not mesh with the driven gear, the angle of the driven gear will not shift due to the vibration C2 applied to the mounting head, which will prevent the mesh from interfering. 6: Able to perform satisfactory movements.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an entire embodiment of the device of the present invention, FIG. 1 is a top view of the index table, and FIGS. 2 and 3 show the stay i/
FIG. 6 is a partial vertical cross-sectional view showing different operating conditions in the width of the vehicle; FIGS. 4 and 5 are operation explanatory diagrams showing the behavior in each stage 1 at the same time in parallel. 6 to 8 are partially sectional front views showing three different operating states of Station IVI. Figures 9 to $11
The drawings show the driving gear moving mechanism, FIGS. 9 and 10 are partially sectional side views in different operating states, and FIG. 11 is a front view. Figure 12 shows the relationship between the driving and driven gears and the wedge in a plan view. It is a diagram. Sip... Part, 051... Mounting head, ■... Driven gear -... Driving gear, (9)... Arm (support body of mounting head), cg3... Wedge (Lock means)a
Figure 6
Figure 9 Figure 1 @ Figure U

Claims (1)

[Claims] 1. A driven gear is connected to a mounting head that holds a component, and a driving gear that rotates and attracts the driven gear to change the placement direction of the component is placed on a specific stage i/w. I'm going to the next thing. An electronic component mounting apparatus characterized in that the support of the mounting head is provided with a locking means for stopping the rotation of the driven gear except during the meshing period of the driving gear. 2. Wedge that connects the teeth of the driven gear? 2. A device as claimed in claim 1, characterized in that the locking means are cylindrical. 3. The device according to claim 1, characterized in that the lock is released in conjunction with the approach of the driving gear to the driven gear.