JPH0226400B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-head component assembling apparatus, which is effective when used, for example, as an apparatus for simultaneously supplying and assembling a large number of electronic components onto one board.

Conventionally, in multi-head component assembling machines that can clamp a large number of components at the same time and assemble the components one after another, the pressure source for each assembly head is taken directly from the chamber provided in each head holder. It is possible to install a pressure switch in the middle of the piping to detect whether the parts have been attracted or not, and a valve to switch the pressure supplied to each assembly head between positive pressure and negative pressure. I couldn't do it. Therefore, pressure switches and valves had to be installed separately in addition to the assembly equipment, which hindered cost reduction, weight reduction, and miniaturization.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a valve built into an assembly head for detecting component assembly errors and switching the pressure using a single switch.

In order to achieve this objective, the present invention takes the following measures.

That is, a pin is joined to one end of the assembly head, the assembly head and pin are slidably supported by a holder, and this holder is further slidably supported by a multi-head holder. This multi-head holder is equipped with a positive pressure chamber into which positive pressure is introduced and a negative pressure chamber into which negative pressure is introduced, and when the assembly head and holder slide inside the multi-head holder, this Either the pressure chamber or the negative pressure chamber communicates with the inside of the assembly head. Also,
A hammer having a sliding hole inside is disposed at a position facing the holder, and a second pin is slidably disposed within the hammer so as to face the pin. A proximity switch was fixed at a position opposite to a dog that moved as the second pin slid.

Next, the most preferred embodiment of the present invention will be explained based on the drawings.

FIG. 1 is an external view of the multi-head assembly device. The base 1 on which the entire assembly device is mounted is movable in the directions of arrows X and Y in FIG. A housing 2 that supports the components of the assembly device is installed on the base 1, and an assembly head 4 that sucks electronic components 26 and assembles them onto the board 5 is installed on the housing 2.
They are arranged on the circumference in a number corresponding to the number of parts to be assembled. This assembly head 4 is movable in the direction indicated by arrow Z in FIG. The electronic components 26 are supplied to the electronic components 26 by a component supply device 6 whose tip end portion 7 is arranged on a circumference having the same diameter as the circumference on which the assembly head 4 is arranged.
is supplied and arranged.

FIG. 2 is a sectional view of the assembly device. The assembly head 4, which attracts parts at its tip, has a hollow cylindrical shape with a passage 4a inside, and a side hole 401 is bored in the side surface of the assembly head 4, which communicates the inside passage 4a with the outside. As shown in FIG. 3, a pin 3 is screwed to the upper end of the assembly head 4.
The pin 3 is slidably inserted and fixed inside a cylindrical holder 30. A communication hole 301 is bored in the side surface of this holder at a position facing the side hole 401 of the assembly head 4,
A lid 31 is fixed to the upper end of the holder 30. The upper end of the pin 3 is fixed to the lid 31 by a clip 3a. A spring 33 is disposed between the pin 3 and the lid 31, and urges the pin 3 and the assembly head 4 downward. The holder 30 is slidably inserted and held in the multi-head holder 14 having a cylindrical portion 14a, and is urged upward by a spring 34 disposed between the multi-head holder 14 and the lid 31. ing. The multi-head holder 14 is fixed to the hollow cylindrical shaft 12 via a key.

An upper plate 28 is disposed on the upper surface of the multi-head holder 14 to form a negative pressure chamber 40, and a lower plate 25 is disposed on the lower surface to form a positive pressure chamber 50.
is formed. This negative pressure chamber 40 and positive pressure chamber 5
0 has a negative pressure communication hole 40a and a positive pressure communication hole 50a, respectively.
is provided, and when the assembly head 4 slides up and down, the side hole 401 of the assembly head 4 and one of the communication holes communicate with each other via the communication hole 301 provided in the holder 30. However, the passage inside the assembly head 4 communicates with the positive pressure chamber 50 or the negative pressure chamber 40. In addition, normally the side hole 4 of the assembly head 4
01 and the communication hole 40a of the negative pressure chamber 40 are in communication.

The shaft 12 is pivotally supported by the housing 2 via a bearing 121, and a pipe 13 is provided in the hollow part.
is loosely inserted. Shaft 12 is housing 2
A positive pressure communication passage 10 is provided in a portion protruding from the top surface of the
1. A rotor 10 having a negative pressure communication passage 102 is fitted. Further, a shaft holder 11 is fitted on the outer periphery of the rotor 10, and this shaft holder 11 guides positive pressure from a pressure source (not shown) to the positive pressure chamber 50 via the positive pressure communication passage 101 and the pipe 13. a positive pressure port 111 for
A negative pressure port 1 for guiding negative pressure from a pressure source (not shown) to the negative pressure chamber 40 via the negative pressure communication path 102 and the space between the shaft 12 and the pipe 13.
12 are provided respectively. In other words, rotor 1
0 and the shaft holder 11 constitute a rotary joint, and even when the shaft 12 is rotating, the negative pressure chamber 40 and the positive pressure chamber 5 are
0 can be supplied with negative pressure and positive pressure, respectively.

Further, a gear holder 15b is installed in a portion of the shaft 12 inside the housing 2, and a gear 15a is fixed to this gear holder 15b. A first motor 8 provided on the outer surface of the housing 2
This gear 15a receives the driving force of the shaft 12.
is rotating.

Furthermore, a shifter 1 is located in the center of the shaft 12.
6 is disposed through a bearing 161 so as to be rotatable around the shaft 12 and slidable in the axial direction. This shifter 16 has teeth cut on its outer periphery, and a second motor 9 installed on the outer surface of the housing 2
The drive force is received through the coupling 19 and the gear 20 to rotate. Further, one end of the cam lever 17 is rotatably connected to the shifter 16.

The cam lever 17 has a center portion 171 rotatably supported by the housing 2, and a cam 18 rotated by a third motor 29 installed on the side surface of the housing 2 at the other end in sliding contact. . One end of a large spring 191 is locked to the extreme end on the side where the cam 18 is in sliding contact, and the other end of the large spring 181 is fixed to the housing 2. As a result, the cam lever 17 is always urged to be in sliding contact with the cam 18, and therefore the cam 18
As the cam lever 17 rotates, the cam lever 17
The shifter 16 slides in the axial direction of the shaft 12.

Further, a cylindrical hammer 21 is fixed below the shifter 16, and a second pin 22 is slidably inserted and held inside the hammer 21. A lid member 32 is fixed to the protruding portion with bolts 321. Also, the hammer 21 and the second pin 22
A spring 27 is interposed in the gap between the two pins, and the second pin 22 is biased downward by the spring 27. However, if the second pin 22 receives a force directed upward from below, and that force overcomes the biasing force of the spring 29, the second pin 22
rises together with the lid member 32. Furthermore, Hammer 2
1 and the second pin 22 are arranged at positions facing the lid 31 provided on the upper surface of the holder 30, and when the hammer 21 and the second pin 22 are lowered,
The hammer 21 and the lid 31 come into contact through a through hole 201 provided in the housing 2.

A protruding dog 24 made of a magnetic material is provided on the lower surface of the lid member 32, and a well-known proximity switch 23 is arranged opposite to this dog 24.
is fixed to the housing 2. The proximity switch 23 detects the distance between the dog 24 and the proximity switch 23 as the dog 24 approaches.

Next, the operation of this embodiment will be described.

First, the board 5 is conveyed to a predetermined position by a belt conveyor (not shown), and a plurality of electronic components 26 to be assembled onto the board 5 are arranged at the predetermined positions by the component supply device 6. Then, the base 1 is moved by a well-known driving method so that the tip of the assembly head 4 is positioned above the arranged parts 26. When negative pressure is supplied to the negative pressure port 112 from a pressure source (not shown), the negative pressure is transmitted to the negative pressure chamber 40 via the space between the shaft 12 and the pipe 13. Side hole 401 on the side of assembly head 4 and negative pressure communication hole 40a of negative pressure chamber 40
Since the inside of each assembly head 4 is normally in communication with
6 is attracted to the tip of each assembly head 4. This state is shown in FIG.

Next, attention will be paid to one of the plurality of assembly heads 4 and the component 26a sucked to its tip. Since the component 26a is assembled onto the board 5 with a fixed orientation, the shaft 12 is rotated by the first motor 8, and the multihead holder 14 is rotated so that the component 26a faces in the mounting direction. Once the component 26a is in the correct mounting direction, the base 1 is then moved so that the component 26a is positioned on the board 5 at a predetermined mounting position. and,
The second motor 9 is driven, and this driving force rotates the shifter 16 via the coupling 19 and the gear 20, and moves the hammer 21 onto the assembly head 4.

Then, the third motor 29 is driven, and the cam 1
Rotate 8. Since the cam lever 17 has one end in sliding contact with the cam surface of the cam 18, as the cam 18 rotates, the sliding end moves up and the other end moves down. A shifter 16 connected to the other end of the shaft 12
The hammer 21 comes into contact with the lid 31 provided on the upper surface of the holder 30, and pushes up the holder 30 and the assembly head 4 against the force of the spring 34. Then, the component 26a is placed at the mounting position on the board 5. At this time, as shown in FIG. 4, since the assembly head 4 and holder 30 are lowered, the side hole 401 on the side surface of the assembly head 4 and the communication hole 301 of the holder 30 are also lowered, and communication with the negative pressure chamber 40 is interrupted. It is shut off and communicated with the positive pressure chamber 50. Then, the inside of the assembly head 4 becomes a positive pressure, and the component 26a that has been suctioned to the tip of the assembly head 4 is detached and attached to the board 5.

Also, as the hammer 21 descends, the dog 2
4 also descends, and the distance between the proximity switch 23 and the dog 24 gradually becomes shorter. However, the assembly head 4
If the part 26a is reliably attracted to the tip of the
After the component 26a contacts the substrate 5, the hammer 2
Even if 1 is lowered, only the holder 30 is lowered, and the assembly head 4, the pin 3, and the second pin 22, which are present in the hammer 21, are lowered.
maintains its current position. Therefore, the pin 3 and the second pin 22 float relatively to each other, and the lid member 32 and the dog 24 connected to the second pin 22 maintain a certain distance l from the proximity switch 23, and do not come any closer to each other. .

On the other hand, if the component 26a is not attracted to the tip of the assembly head 4 as shown in FIG. As the hammer 21 descends, the holder 30, the assembly head 4, the pin 3, and the second pin 22 also descend, and at the same time the dog 24 fixed to the lid member 32 also closes to the proximity switch 23. approaches. When the distance between the dog 24 and the proximity switch 23 becomes smaller than a certain distance l, the dog 2
4 is detected by the proximity switch 4, a signal notifying a component assembly error is sent to a device (not shown), and this assembly error board is excluded.

In this way, a plurality of electronic components 26 are assembled one after another on one board 5, and all electronic components 26 are assembled one after another on one board 5.
After the assembly of the substrate 6 is completed, the substrate 5 is conveyed to a subsequent process by a belt conveyor (not shown). Then, a new board 5 is carried into a predetermined position in the same manner, and the operations described above are repeated.

As explained above, if the multi-head component assembling device of the present invention is used, a single switch can detect a component installation error, and the positive and negative pressures supplied to adsorb or detach the component from the assembly head can be adjusted using a single switch. The switching valve can be built into the assembly head.

[Brief explanation of drawings]

Fig. 1 is an external view showing an embodiment of the present invention, Fig. 2 is a longitudinal sectional view, Figs. 3 and 4 are sectional views of main parts showing operation, and Fig. 5 is a main part showing a case where parts are attached incorrectly. FIG. 3... Pin, 4... Assembly head, 4a... Passage, 401... Side hole, 8... First motor (drive mechanism for rotating the multi-head holder), 9...
2nd motor (drive mechanism that moves the hammer onto each assembly head), 14... Multi-head holder, 17... Cam lever (drive mechanism that moves the hammer in the axial direction of the assembly head), 18... Cam (drive mechanism that moves the hammer in the axial direction of the assembly head), 21...Hammer, 22...Second pin, 23...Proximity switch, 24...Dog, 2
9...Third motor (drive mechanism for moving the hammer in the axial direction of the assembly head), 30...Holder,
301... Connection path, 40... Negative pressure chamber, 40a...
Negative pressure communication hole, 50...Positive pressure chamber, 50a...Positive pressure communication hole.

Claims (1)

[Claims] 1. A plurality of cylindrical assembly heads each having a passage inside and a side hole communicating with the passage on the side, a pin joined to one end of each assembly head, and a pin and each assembly head connected to each other. a holder that is slidably held and has a communication path at a position opposite to the side hole;
It has a negative pressure chamber for slidably holding each of the holders and a positive pressure chamber for introducing negative pressure, and a positive thickness chamber for introducing positive pressure, and further communicates the negative pressure chamber with the communication path. a multi-head holder having a negative pressure passage hole and a positive pressure communication hole for communicating a positive pressure chamber with the communication passage; a drive mechanism for rotating the multi-head holder; and a drive mechanism disposed at a position facing the holder. a second pin slidably held inside the hammer so as to face the pin; a dog that moves as the second pin slides; a proximity switch fixed at a position facing the dog; a drive mechanism for moving the hammer onto each one of the plurality of assembly heads; and a drive mechanism for moving the hammer in the axial direction of the assembly heads. The communication path selectively communicates with either the negative pressure communication hole or the positive pressure communication hole when the assembly head and the holder slide within the multihead holder. A multi-head parts assembly device featuring: