JPS6133680Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a component supply and discharge device for plate-shaped components in an automatic assembly machine, and particularly to a component supply and discharge device suitable for use in a printed circuit board supply and discharge section.

Printed circuit board assembly equipment that automatically supplies and assembles electronic components, etc. onto printed circuit boards (plate-shaped parts) has traditionally been equipped with a magazine 6 as shown in Fig. 2.
was used to stock printed circuit boards. This magazine 6 is placed on the printed circuit board supply section of the printed circuit board assembly device, and printed circuit boards are directly supplied from this magazine 6, and the printed circuit boards on which electronic components etc. are assembled are returned to the next printed circuit board discharge section. It is inserted into the magazine 6 and stored.

A printed circuit board assembly apparatus using this magazine 6 is mainly composed of a board supply section A, a component supply section B, an assembly section C, and a discharge section D, as shown in FIG.

As shown in the figure, the substrate supply section A has four transport conveyors 2 to 5 in the main body 1 of the supply section, and a magazine 6 as shown in FIG. 2 is introduced therein. Magazine 6 is
Slits S at predetermined intervals (hereinafter referred to as unit pitch) are formed inside both side surfaces, and printed circuit boards are inserted and stored at predetermined intervals using the slits S.

The magazine 6, in the printed circuit board stock condition as described above, is first placed on the conveyor 2 from the direction of the arrow and introduced into the interior, and then transferred to the conveyor 3 when the conveyor 3 is empty. After being transferred from the conveyor 3 to the conveyor 4 on the elevator, they are sequentially raised by the elevator to the storage pitch for printed circuit boards. During this upward movement, the printed circuit boards in the magazine 6 are sequentially pushed out onto the conveyor 7 at a predetermined timing, and the magazine 6, which is empty after all the printed circuit boards have been supplied, is transferred onto the conveyor 5 and collected.

The printed circuit board pushed out onto the conveyor 7 is
Next, it is supplied onto the XY table 8 of the assembly section C.
A turret head 9 for loading parts is installed on the XY table 8, and parts supplied from a parts supply line 10 are mounted on the printed circuit board according to a predetermined program.

The printed circuit board after this component mounting is completed is discharged onto the bridge conveyor 14 on the storage side. The discharge section D also has almost the same configuration as the supply section A, and a magazine (not shown) for storing circuit boards is placed on the conveyor 15 on the elevator, and the printed circuit board is stored in this magazine (not shown). They are stored sequentially from the bottom. The magazine (not shown), which has been completely stored when the elevator has descended to its lowest position, is discharged by the conveyor 16.

As described above, the printed circuit board is assembled automatically.

By the way, in such a printed circuit board assembly apparatus, each printed circuit board stored in the magazine 6 supplied from the supply section has a different thickness depending on the type of parts already attached. The storage pitch in the magazine 6 also differs depending on the type of printed circuit board. Therefore, it is necessary that the raising pitch of the elevator that sequentially raises each printed circuit board in the magazine 6 corresponds to this storage pitch. Although the relationship is reversed, this also applies to storage.

In conventional devices, the number of storage pitches can be selected by counting the number of rotations of the drive screw or changing the gear ratio of the reduction gear to select the dog. A configuration was adopted to count the number of

However, such a configuration has drawbacks such as difficulty in switching when the storage pitch is changed, or there is a risk of miscounting due to electrical noise.

This invention was made in order to eliminate such drawbacks, and the dog rows are arranged at the same pitch, which is an integral multiple of the unit pitch, corresponding to the storage pitch assumed on the outer periphery of the master rod of the column. configure,
Multiple dog rows are provided with different pitches,
It is an object of the present invention to provide a board storage device for a printed circuit board supply/discharge section, which allows the type to be arbitrarily selected and allows the storage pitch to be changed easily and accurately due to a change in the printed circuit board. It is something.

Hereinafter, one embodiment of this invention will be described in detail with reference to the drawings.

3 to 6 each show the structure of the main part of this embodiment.

Reference numeral 20 denotes a guide column provided in the main body 1 of the supply section, and as shown in FIGS. A slide rail 22 is attached to guide the elevator 21 up and down. As shown in FIGS. 3 and 6, the elevator 21 is driven by a motor 24 rotating a trapezoidal screw (feed screw) 23 provided along the rising direction (piling direction) of printed circuit boards. be exposed.

Further, at the upper end of this trapezoidal screw 23, as shown in FIGS. 3 and 4, a cam plate (detection member) 26 for operating the proximity switch 25 is provided.
The cam plate 26 has a notch 27 as shown in FIGS. 3 and 4, and when the plate surface is inserted into the slit of the sensor section of the switch 25, the switch 25 is activated.
Turn it on. The fixed position of the trapezoidal screw 23 at which the elevator 21 should be stopped is detected by the proximity switch 25 which outputs a signal every time the unit pitch moves.

On the other hand, 28 is arranged parallel to the trapezoidal screw 23,
This is a master rod that moves together with the elevator 21, and as shown in FIGS. 5 and 6, a dog row group consisting of dog rows 29a to 29h is planted on its outer peripheral surface. This dog row group consists of a dog row provided at the same pitch along the component stacking direction at a pitch that is an integral multiple of the unit pitch, and a plurality of dog rows provided at different pitches from this dog row. For example, eight groups of limit switch dogs 29a to 29h are formed, each provided at a predetermined storage pitch in the vertical direction. Each of the dog groups 29a to 29h corresponds to the storage pitch of the printed circuit board in the magazine 6, for example, 20, 25,
It is formed with a pitch that is an integral multiple of the unit pitch such as 30, 35, 40, 45, 50, 55 mm. 30 is a limit switch that detects this setting pitch and operates.
As shown in FIG. 5, it is fixed to the support column, and its detection end is provided so as to correspond to one of the dogs 29a to 29h. As shown in FIG. 3, a dial 31 is attached to the upper end of the master rod 28, and a lock screw 32 is provided slightly below the dial 31. Therefore, by loosening the lock screw 32 and varying the dial 31, the setting pitch can be easily selected.

As described above, the vertical feed pitch of the elevator 21 is determined by detecting the set pitch with the limit switch 30, further detecting the fixed position of the trapezoidal screw 23 with the proximity switch 25, and moving the elevator 21 up and down based on the signals from both of them. Accurate positioning is achieved by stopping the trapezoidal screw 23.

In this way, the elevator 21 carrying the magazine 6 is raised in correspondence with the storage pitch of the printed circuit boards, and the printed circuit boards are successively pushed out at a predetermined timing by, for example, a pusher (operated by an air cylinder). Further, the height of the elevator at the time of magazine transfer between the conveyors 3 and 5 is detected by a rising end limit switch 26 and a descending end limit switch 27. Such operation control is performed according to an arbitrary sequence. The above-mentioned operation of the elevator 21 is exactly the same in the case of the elevator of the discharge section, except that the amount of rise becomes the amount of descent.

As described above, according to this invention, dog rows are provided on the circumferential surface of the master rod with pitches that are different integer multiples of the unit pitch corresponding to the storage pitch, and the dog rows can be arbitrarily selected. Therefore, it is extremely easy to change the storage pitch, and it is possible to accurately control the elevation and descent of the elevator regardless of noise or the like.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the entire printed circuit board assembly apparatus, FIG. 2 is a front view showing the structure of the magazine, and FIG. 3 is a plan view of a printed circuit board supply section according to an embodiment of the invention. Figure 4 is a side view of the main part, Figure 5 is a plan view of the main part, and Figure 6 is
It is a side sectional view of the above-mentioned example. A... Board supply unit, 6... Magazine, 8...
XY table, 15... Conveyor, 20... Guide column, 21... Elevator, 22... Slide rail, 23... Trapezoidal screw (feed screw), 24...
...Motor, 25... Proximity switch, 28... Master rod, 29a-29h... Limit switch dog, 30... Limit switch, 31...
Dial.

Claims (1)

[Scope of utility model registration request] The rotation of a feed screw driven by a motor moves the plate-shaped parts in the stacking direction, and the plate-shaped parts stored in the magazine are transferred to the next stage processing section at storage pitches that are an integral multiple of the unit pitch. In a parts supply/discharge device having an elevator for stacking parts, a master rod is arranged parallel to the feed screw and moves together with the elevator; A dog row group consisting of a dog row provided at the same pitch along the stacking direction of parts with a pitch that is an integral multiple of the unit pitch, and a dog row group consisting of a plurality of dog rows provided at different pitches from this dog row; a limit switch, one of which is provided so as to face the detection end, and which indexes the master rod based on the detected dog row;
A proximity switch outputs a signal each time the unit pitch of the elevator moves by movement of a detection member fixed to the feed screw, and the feed screw is stopped when the signals between the limit switch and the proximity switch match. A parts supply and discharge device characterized by having a control means.