JPH0793520B2 - Substrate support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a device for supporting a flexure of a substrate with a backup pin when the substrate is processed by applying pressure.

(B) Conventional Techniques Various devices have been put into practical use as a device for restricting the deflection of the substrate generated when the collet mounts electronic components on the substrate. In many of these devices, a plurality of backup pins are removably mounted on a backup pin base, and the backup pins support many points on the back surface of the substrate. One example of such an apparatus is Japanese Patent Laid-Open No. 59
-29492 publication.

(C) Problem to be Solved by the Invention In the above-mentioned device, the operator changes the position of the backup pin accompanying a model change. It is easy to change the position of the backup pin if the electronic parts are not mounted on the back side of the new model board, but if the board is already mounted with electronic parts, the position of the backup pin should be changed so as not to touch the electronic parts. It had to be set, which made the task cumbersome. The present invention is intended to reduce the burden on the operator and to simplify the configuration of the backup pin mount head by adopting a configuration in which the backup pin mount head is used for automatic repotting.

(D) Means for Solving the Problems In the present invention, a backup pin base in which backup pins supporting a substrate are erected on the upper surface, an actuator for moving the backup pin base up and down, and a backup according to the thickness of the substrate to be supported Ascending limit setting means that determines the ascending limit of the pin base, a backup pin mount head that moves three-dimensionally to replant the backup pin, and a backup pin that holds a backup pin and is always in the descending position. In order to match the backup pin support level of the backup pin base to the backup pin stocker that can be raised only when it is necessary to move in and out and the backup pin support level when the backup pin stocker is raised. Limit climb height Providing a movable stopper to the substrate supporting device.

(E) Action When changing the model, the backup pin mount head enables chucking of the backup pin.
Raise the backup pin stocker and backup pin base. At this time, the movable stopper works and stops the backup pin base according to the rising limit of the backup pin stocker regardless of the rising limit set for the backup pin base, and the backup pin support levels of both are matched. . After this, the backup pin mount head replants the backup pin.

(F) Example One example will be described with reference to the drawings.

FIG. 1 shows the overall structure of the substrate supporting apparatus 1. The substrate support device 1 has a substrate backup unit 2, a pin stock unit 3, and a backup pin mount head 4 as main components.

Reference numeral 5 denotes a conveyer that conveys the substrate in the A direction, in which a pair of rails are horizontally arranged and a conveyance belt 8 that supports a side edge of the substrate is arranged inside thereof. When the conveyor 5 receives a board from a device in the previous process (not shown), it conveys the board to the component mounting station P set above the board backup unit 2. Here, an electronic component is mounted by a component mounting head (not shown), and when the mounting is completed, the substrate is conveyed again and sent to an apparatus for a post process (not shown).

Reference numerals 6 and 7 denote stop mechanisms provided at the entrance and the exit of the component mounting station P to stop the substrate conveyed by the conveyor 5 at a predetermined position. The stop mechanisms 6 and 7 have a symmetrical structure. The stop mechanism 6 is for a front reference that contacts the front edge of the substrate to stop the substrate, and the stop mechanism 7 is for a rear reference that contacts the rear edge of the substrate to stop the substrate. is there. Conveyor 5 for post-reference boards
After feeding the substrate to the component mounting station P, the carrier belt 8 is fed backward and the trailing edge of the substrate is brought into contact with the stop mechanism 7. As shown in FIG. 2, the stop mechanism 6, 7
Has 12 hits that are rotatable in the vertical plane,
Is urged by the coil spring 11 in the clockwise direction in the stop mechanism 6 and in the counterclockwise direction in the stop mechanism 7, and is rotated by moving the rod 14 of the drive cylinder 13 in and out. When the substrate is stopped, the rod 14 is projected like the stop mechanism 6 shown in FIG. Further, when the substrate is passed, the rod 14 is pulled in and the hit 12 is tilted.

Next, the structure of the substrate backup unit 2 will be described with reference to FIGS. 2 and 3. In the board backup unit 2, a unit base 18 is arranged on a base (not shown) of a component mounting machine, and a pair of support angles 19 are attached to the upper surface thereof. A slide guide 20 is vertically mounted on the inner surface of the support angle 19. A support plate 22 is attached to a slider 21 that slides on a slide guide 20, and supports a horizontal deck 23 at the upper end. As shown in FIG. 1, a backup pin base 25 having a plurality of through holes 24 arranged in a matrix is attached to the upper surface of the deck 23. Reference numeral 26 is a backup pin inserted into the through hole 24. 28 is a support angle
It is a base with both ends connected to the side of 19 and bracket 29
The air cylinder 30 is supported upward via. The rod 31 of the air cylinder 30 is connected to the deck 23 via the joint 32.
Is connected to the bottom surface of. The backup pin base 25 moves up and down as the rod 31 moves in and out. A stopper support plate 34 having a stopper 33 at the upper end is fixed to the back surface of the base 28 on which the air cylinder 30 is supported (FIG. 3). 35 is the deck
The gauge receiver extends from 23 toward the stopper support plate 34. A dug portion is provided on the upper surface of the gauge receiver 35, and the tip of a bolt 36 screwed into the gauge receiver 35 from the lower surface exposes the head in the dug portion. A gauge that determines the rising limit of the backup pin base 25 in this dug portion
37 is inserted and functions as a rising limit setting means. As shown in FIG. 5, when the board 38 arrives at the component mounting station P, the backup pin base 25 is raised by the protrusion of the rod 31 of the air cylinder 30. The ascent continues until the upper end surface of the gauge 37 hits the stopper 33. This determines the substrate support height of the backup pin 26. Fourth
As shown in the figure, several kinds of gauges 37 having different heights (only the kinds of the thickness of the substrate) are prepared. Every time the operator changes the thickness of the board by changing the model, the operator replaces it with the corresponding gauge 37. As a result, the upper surface of the substrate is always supported at a constant height even if the thickness of the substrate changes. The bolt 36 is for adjusting the degree of protrusion of the gauge 37.

Next, the structure of the pin stock portion 3 will be described with reference to FIGS. 6 and 7. The unit base 48 of the pin stock unit 3 is fixed side by side with the unit base 15 of the board backup unit 2 on the base of the component mounting machine. A pillar 50 that supports the deck 49 is attached to the upper surface of the unit base 48 at the upper end. Two bearings 51 are mounted on the deck 49, and a pair of vertical guide rods 52 are fitted to the bearings 51. The upper portion of the guide rod 52 is connected to the base 53 arranged on the deck 49, and the level setting block 54 is attached to the lower portion. A support shaft extending directly below in the center of the lower surface of the deck 49
55 is installed. A bracket 56 is attached to the lower end of the support shaft 55, and an air cylinder 57 is attached to the bracket 56 facing upward. The rod 58 of the air cylinder 57 is the deck
It is connected to the base 53 through a joint 59 that penetrates a through hole (not shown) formed in the 49. The base 53 moves up and down by driving the air cylinder 57. Reference numeral 60 denotes a backup pin stocker supported by the base 53, which is a compact backup pin base 25. The backup pin 26 is inserted into the through hole 61 of the backup pin stocker 60. The backup pin stocker 60 is normally in the lowered position, but when the model is changed, the backup pin stocker 60 is raised by the protrusion of the rod 58 of the air cylinder 57. The ascending ends when the level setting block 54 hits the lower end of the bearing 51.

Next, the structure of the backup pin mount head 4 will be described with reference to FIG. The backup pin mount head 4 has a pneumatic actuator 66 and a pair of pawls 67 that can be opened and closed by the pneumatic actuator 66.

The backup pin base 25 also rises when the backup pins 26 are replanted, but at this time, the rising height is limited by the movable stopper 39 shown in FIG. Movable stopper 39 is the base via bracket 40
Air cylinder 41 supported horizontally on 28 and its rod 42
And an inverted L-shaped contact 43 connected to. A block 45 is fixed to a rod 44 hanging from the lower surface of the deck 23 in response to a hit 43. The movable stopper 39 causes the contact 43 to enter the ascending path of the block 45 by the protrusion of the rod 42.

Next, the backup pin replanting operation of the substrate supporting apparatus 1 will be described with reference to FIGS. 8 and 9. When the model change command is transmitted, the backup pin base
25 and backup pin stocker 60 are each air cylinder
The ascending starts when the rods 31 and 58 of 30 and 57 protrude. At the same time, the contact 43 of the movable stopper 39 also starts moving by the protrusion of the rod 42 of the air cylinder 41 (Fig. 8).
The backup pin stocker 60 is stopped from rising by the contact between the level setting block 54 and the bearing 51. At the same time, the backup pin base 25 is prevented from rising by the contact between the hit 43 and the block 45 before reaching the rising limit defined by the gauge 37. At this time, the backup pin support level of the backup pin base 25 is the backup pin stocker.
Match that of 60. The backup pin mount head 4 waiting on the desired backup pin 26 starts moving here, and the backup pin 26 supported by the backup pin base 25 is relocated to a position corresponding to the next substrate. The unnecessary backup pin 26 is planted in the backup pin stocker 60. Also backup pin
Backup pin stocker 60 if 26 is missing
Take the backup pin 26 from and plant it on the backup pin base 25.

In this embodiment, the backup pin that is inserted into the through hole is used. However, the type of the backup pin is not limited to this, and the backup pin can be formed on the non-perforated base by the attractive force of the permanent magnet. It doesn't matter. The term "replanting" is also applied to the act of peeling such a magnetic attraction backup pin from the base and standing it in another place.

(G) Effect of the Invention When the backup pin mount head is replanted, if the vertical stroke of the backup pin mount head is always constant, an air cylinder is used to move the backup pin mount head up and down mechanism. Can be simplified and convenient. In the present invention, the rising height of the backup pin base changes in various ways according to the thickness of the substrate in the normal substrate supporting operation, but when the backup pins are replanted, the backup pin base is set to the height of the backup pin stocker. Since the heights are matched, the vertical stroke of the backup pin mount head is made uniform, and the intended purpose of simplifying the vertical mechanism can be achieved. Moreover, the leveling of the backup pin stocker and the backup pin base is automatically performed by the movable stopper, so the operator is not burdened.

[Brief description of drawings]

1 is a perspective view showing the structure of a substrate supporting device, FIG. 2 is a front view showing the structure of a substrate backup unit, FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG. 4 is a perspective view of a gauge. , FIG. 5 is a cross-sectional view showing a state where the substrate backup unit supports the substrate,
FIG. 6 is a front view showing the structure of the pin stock portion, FIG. 7 is a view taken along the line BB of FIG. 6, and FIGS. 8 and 9 are diagrams for explaining the backup pin replanting operation of the backup pin mount head. FIG. 26 …… Backup pin, 25 …… Backup pin base, 30 …… Air cylinder (actuator), 38 …… Substrate, 37,35 …… Gauges and gauge receivers that compose the means for ascending, 4 …… Backup pin mount head , 60 …… Backup pin stocker, 39 …… Movable stopper.

Claims (1)

[Claims] 1. A backup pin base having backup pins standing upright for supporting a substrate, an actuator for raising and lowering the backup pin base, and an ascending limit for determining the ascending limit of the backup pin base according to the thickness of the substrate to be supported. A setting means, a backup pin mount head that moves three-dimensionally to replant the backup pin, and a backup backup pin, which is always in the lowered position and only when the backup pin needs to be taken in and out. A backup pin stocker that can be raised and a movable stopper that limits the rising height of the backup pin base so that the backup pin support level of the backup pin base matches the backup pin support level when the backup pin stocker is raised. Board support equipment .