JPS6177400A - Automatic mounting machine for 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 Field of Industrial Application The present invention relates to an automatic mounting machine for electronic components, and more specifically, when a mounting head sucks an electronic component and a direction turning device corrects the mounting direction of the electronic component. The present invention relates to an improvement in a gripping mechanism for holding electronic parts.

Conventional technology Generally, automatic mounting machines for electronic components perform centering, direction rotation, etc. of electronic components.

An electronic component gripping device is shown in which four clamping claws work together to clamp an electronic component on the tip side of an electronic component mounting head and a direction turning device.

Conventionally, as a gripping device for this electronic component, the middle side of the mounting head or the direction turning device is supported by a pin, and each clamping claw is arranged at 90° intervals of 4η, and one end is attached from each pin support position. A gear part is formed on the inner side of the side and engages between opposing clamping claws, and a tension spring is tensioned between these opposing parts to facilitate the upward movement of the mounting head and direction turning device. 'V' is usually installed to open and close the tip of the winter melon in synchronization.

Problems to be Solved by the Invention However, this gripping device for electronic components is not only mechanically extremely complicated, but even if it is possible to move at least the opposing clamping claws in synchronization with each other, other - - It is difficult to move in accurate synchronization with the pair of clamping claws, which causes problems in centering, turning in the J direction, etc.

Means for Solving the Problems In the automatic mounting machine for electronic components according to the present invention, a mounting head for mounting electronic components onto a printed circuit board has a pair of clamping claws for clamping the electronic components sucked at the tip of the nozzle. equipped,
The direction rotating device for correcting the mounting direction of the electronic component at the tip of the nozzle is configured to include another pair of clamping claws that, together with the clamping claws of the mounting head, clamp the electronic component from four directions. has been done.

Function: In this automatic electronic component mounting machine, each pair of clamping claws is provided on the mounting head and the direction rotation device, so each clamping claw can be operated in synchronization with each pair, and moreover, the nozzle tip of the mounting head can Since the sucked electronic components are held between a pair of clamping claws, even relatively heavy electronic components such as irregularly shaped chip components can be reliably transported to the mounting position on the printed circuit board. When correcting the installation direction of the electronic component, the electronic component is supported by being held by the clamping claw at the nozzle tip of the mounting head, so not only can it be reliably clamped by the clamping claw of the directional rotation device, but also the mounting direction of the electronic component can be corrected. The pressure claws work together to securely grip the item from all four directions, making it possible to rotate and center accurately.

Example The following description will be made with reference to the accompanying drawings.

This automatic mounting machine for electronic components is equipped with mounting heads 10 for electronic components at regular intervals around the circumference of a rotor 20, and as the mounting heads 10 are moved by the rotation of the rotor 20, the mounting heads 10 are mounted around the circumference of the rotor 20. Each mounting head 10 individually receives electronic components from a plurality of tape feeders 30 arranged within a predetermined area of Electronic components are mounted on the board P. In this process, each mounting head 10 moves by sucking the electronic component at the nozzle tip by connecting a vacuum pressure supply tube through a vacuum pulp, and a plurality of tape feeders are arranged radially around the nozzle tip. From 30 onwards, we are supplying a wide variety of electronic components, both standard and irregularly shaped. In addition, when the mounting head 10 receives the electronic component from the tape feeder 30 and moves it to the XY table, it is inspected to see if the electronic component is missing, and the mounting direction of the electronic component is corrected by the direction rotation device 40. It is designed to go through each process. The electronic component gripping mechanism described below in these processes consists of a mounting hand that mounts irregularly shaped electronic components,
It is preferable to equip a direction turning device for correcting the mounting direction of electronic components or a direction turning device for restoring the direction in order to eject missing irregularly shaped electronic components.

The gripping mechanism includes a pair of clamping claws 12a that grips the electronic component sucked at the nozzle tip of the vacuum nozzle 11.

+2b on the mounting end 10, and another pair of clamping claws 41a on the direction turning device 40, including when correcting and restoring the mounting direction of electronic components.

41b. Of these clamping claws 12a, +2b, 41a, 41b, those of the mounting head 10 open and close when extracting electronic components from the tape feeder 30 and mounting the electronic components on the printed circuit board P, and the directional rotation device 40 The clamping claw 12a of the mounting head 1O is used when setting the direction of electronic components.
, 12b, it can be opened and closed to clamp electronic components from four directions.

Each of the clamping claws 12a, 12b, 41a, 4
1b mounting mechanism will be explained based on the direction turning device 40 shown in FIGS. 2 to 6. A pair of clamping claws 41a and 41b are inserted and arranged so as to be vertically movable in the center within a receiver 11 portion 401 having a generally concave cross section. The actuating shaft 402 is mounted around the operating shaft 402. The receiver 11 part 401 has a perfect circular shape, and a guide plate part 4 integrally molded into a rib shape with a constant width is provided on the inner periphery of the receiver 11 part 401.
03a and 403b are provided at two locations.

These guide plate parts 403a and 403b are for guiding the operating shaft 402 that moves downward.
Each notch 4 of the lower tsuba 404 is formed to extend laterally from the axis of the
05a and 405b fit together. In addition to the lower tsuba 404, the actuating shaft 402 includes an upper tsuba 406 which is spaced apart from the lower tsuba 404 and is over-molded with a relatively small diameter.
have. The upper tsuba 40B is each notch 4 of the lower tsuba 404.
05a, 40 notches at the same level as 405b? a, 4
07b, and is adapted to receive and support each of the clamping claws 41a and 41b. Each clamping claw that inserts silk into the stamen 4
1a and 41b have their respective tip ends bent into a substantially dogleg shape on the sides to be able to hold electronic components, and from the outer side there is a protrusion 42a that engages with the opening of the socket 401.
, 42b, and a projection 43a that engages with the lower side of an upper collar 406 that projects from the inner side of the operating shaft 402.

43b are integrally molded. The latter protrusion 43
a and 43b serve as fulcrums when the clamping claws 41a and 41b open and close, and their tips abut against each other.The lower surface of the second tsuba 406 is formed with a relatively large slope of about 10-15 degrees. Pivotally engaged.

Each of these pinching claws 41a, 41b has a protrusion 42 on the outer side.
a.

42b is placed on the guide plate portions 403a and 403b of the socket 401 in the case of the illustrated embodiment, and the protrusions 43a and 43b on the inner side are placed on the upper flange 406 of the operating shaft 402.
and further engages with the notch 40 of the upper flange 408? a, 407
By fitting into b, the tip side protrudes and the socket part 401
Positioned within. In addition, each pinching claw 41
a, 41b are the receiving portions 40 from the projections 42a, 42b.
Q144a, 44b have recesses 44a, 44b formed by cutting out the outer sides located within Q144a, 44b into arc shapes.
A pinching claw 41a is formed by fitting a perfectly circular coil spring ring 408 into each of b.

41b is bundled and supported around the operating shaft 402.

The gripping mechanism for this electronic component is explained by referring to FIGS. 2 and 7.
When the operating shaft 402 is retracted until the collar 404 touches the inner bottom surface of the receiver 11 portion 401, the winter melon 41a.

The protrusions 42a and 42b of the holder 41b engage with the open edge l2 of the first part 401, and the coil spring ring 408 is moved in the expanding direction using the pivot engagement point between the protrusions 43a and 43b and the first collar 40ei as a fulcrum. By pulling, the tip sides of the winter melons 41a and 41b are brought into a closing operation state in which they are close to each other.
1, the operating shaft 4
The pinching claws 41a and 41b supported around the axis of the winter melon 41a also move.

The protrusions 42a and 42b of 41b are now released from the forced oppression that they received at the open edge of the receiver [1 part 401].

At this time, the coil spring ring 40 which has been in the extended state until now
8 is compressed and deflected, and each clamping claw 41a is moved around the protrusions 43a and 43b, which are pivotally engaged with the J-flange 406, as fulcrums.
, 41b begin to expand in synchronization.

During this expansion operation, the electronic components are pinched by the clamping claws 41a and 41b.
can be received between each tip of the actuating shaft 4.
As 02 descends, the open edge of the socket 401 and the clamping claw 41, which are located at a slightly higher position due to spring deflection as will be described later,
a, 41b (7) When the protrusions 42a and 42b engage, each of the clamping claws 41a and 41b closes and clamps the electronic component.

Similarly, the mounting head 10 also has a pair of clamping claws 12a.
, 12b are attached, and the mounting head 10 can be provided with respective clamping claws 12a, 12b directed downward from the nozzle tip with the vacuum nozzle 11 as an operating axis. Referring to FIGS. 8 and 9, this mounting head 10 can be configured to move the vacuum nozzle 11 up and down using a drive motor 50 as a drive source. When picking up an electronic component, when the hammer solenoid 12 receives an activation command and the solenoid pin engages the piece 13, the operating rod 16 is lowered via the cam follower 15 that engages with the cam groove of the cam disk 22a shown in FIG. When the hammer solenoid 12 attached to the shaft end of the hammer solenoid 12 moves downward, the vacuum nozzle of the mounting head 10 moves downward. With this downward movement, the mounting head 0 absorbs the electronic components from the tape feeder 30 at the nozzle tip, and then the cam disk 14
The vacuum nozzle 11 moves along the cam groove, and returns to its original position while holding the electronic component between the pair of right and left pinching claws 12a and 12b. Also, when installing electronic components, the vacuum nozzle 11 is lowered by removing the latching lever 18 using the hammer solenoid 17.
Moreover, the clamping claws 12a and +2b can be opened. Each of these operations is carried out by the mounting head 1 as described above.
0 to a predetermined position by the rotation of the rotor 20, during which time the electronic components are sucked to the nozzle tip by vacuum pressure, and a pair of clamping claws 12a,
Since it is also clamped by 12b, even heavy objects such as irregularly shaped chip parts can be reliably supported and transported.

In the direction turning device 40, referring to FIGS.
The actuating shaft 40 is integrally molded on the inner tube 410.
2 is inserted and arranged. The inner tube 410 is arranged so that the outer tube 40 moves slightly in one direction as the operating shaft 402 moves upward.
Compression spring 411 interposed between
It is supported so that it can be deflected in two directions. In addition, the operating shaft 40
2 is tensioned downward by a compression spring 414 disposed between a collar 412 attached to the lower end of the shaft and a collar 413 of the outer tube 408, and the spring 41
Plate part 4 integrally attached with collar 412 against 4
15 is mounted so that it can be moved upward by moving it upward using a drive cam or the like. This direction turning device 40
Now, when the plate part 415 integrally attached to the collar 412 is pushed up in both directions, the operating shaft 402 moves in both directions, and the protrusions 42a and 42b of the winter melons 41a and 41b are detached from the socket part 401. By contracting and expanding the coil spring ring 408, the electronic component supported by the mounting head 10 is received. Along with the J- and J'l movements of the operating axis 402, the inner tube 410 also moves to the compressor 2. It is raised to a certain position by the extension of John spring 411. When an electronic component is received between the tips of the clamping claws 41a and 41b, the operating shaft 402 is lowered by the descent of the plate portion 415, and the projections 42a and 42b of the clamping claws 4]a and 41b are slightly compressed by the compression spring 411. Uke 11 in a high position
By contacting the open edge of the portion 401, each clamping claw 4]a
, 41b pulls the coil spring ring 408 and performs a closing operation to clamp the electronic component. Each pinching claw 41a, 41b
When the electronic component is clamped, the clamping claws 12 of the mounting head 10
In combination with a and 12b, electronic components can be held from four directions, and the direction of the electronic components can be adjusted by rotating the entire direction turning device including the mounting head 10 at an appropriate angle using a stepping motor or the like. Moreover, centering of electronic components can also be performed at the same time.

When turning in this direction, the mounting head 10 is moved downward to temporarily release the clamping claws 12a and 12b, and
The electronic component held at the tip of the nozzle may be held only by the pinching claws 41a and 41b of the direction turning device 40.

Even in this case, no problem occurs because the electronic component is clamped again when the mounting head IO moves in the upper stomach.

As described in ``Effects of the Invention'' 2, according to the automatic mounting machine for electronic components according to the present invention, a pair of clamping claws that can be easily opened and closed in synchronization with each other are provided on the mounting head and the direction turning device to transport electronic components. In addition, since it can rotate in different directions, it is possible to perform electronic component mounting work with extreme accuracy.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the correspondence between the mounting head and the direction turning device in an automatic electronic component mounting machine according to the present invention, and Fig. 2 is a part showing the gripping mechanism for electronic components incorporated in the direction turning device. A sectional view, FIGS. 3 to 6 are explanatory views showing each component of the gripping mechanism, and FIG. 7 is an explanatory view of in-phase operation. 10: To mounting, 1, vacuum nozzle, 12a. +2b:'-pair of clamping claws, 40: direction rotation device,
41a. 41'b A pair of knee clamping claws. Figure 1 JP-A-1-77400 (5) Figure 2

Claims (1)

[Claims] The mounting head, which attaches electronic components to a printed circuit board, is equipped with a pair of clamping claws that clamp the electronic components picked up by the nozzle tip, and the clamping force of the mounting head is attached to a direction rotation device that corrects the mounting direction of the electronic components at the nozzle tip. An automatic electronic component mounting machine characterized by being equipped with another pair of clamping claws that work together with the claws to clamp the electronic components from four directions.