JPH0585446B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a round magazine conveyor device that has intermediate buffering and printed board supply and replenishment functions in a line for mounting electronic components on printed circuit boards.

Conventional structure and its problems In the conventional magazine conveyor, Fig. 5,
As shown in FIG. 6, the magazine lifting device 52, 5
6 and conveyors 54 and 55, the magazine rack 53 is raised one pitch at a time by a magazine lifting device 52, and printed circuit boards are stored into the rack from a primary side machine 51. When full, the magazine rack 8 passes through the conveyor 54 and onto the magazine lifting device 56. Thereupon, the magazine rack 58 feeds the printed circuit board to the secondary machine 57 while descending one pitch at a time. When the magazine rack 58 becomes empty, it is carried out onto the conveyor 55 and returned to the initial magazine lifting device 52. There is no problem with this configuration if the production capacity of the primary side and the secondary side are almost equal, but if the production capacity of the primary side is lower than that of the secondary side,
Conveyor 55 quickly fills up with empty magazines,
Even when the magazine rack 58 reaches the lower limit, it cannot be ejected onto the conveyor 55, and the magazine rack flows into the magazine lifting device 52, the waiting magazine rack flows out onto the conveyor 55, and the conveying section of the magazine lifting device 56 rises. There was a problem in that printed circuit boards could not be supplied to the secondary machine 57 until a new magazine rack was received from the conveyor 54.

Purpose of the Invention The present invention solves the above-mentioned problems of the conventional art, and is capable of reducing the stock of magazines by providing a sub-conveyor and a magazine moving device that automatically carries in and out magazine racks from the sub-conveyor to the magazine lifting device. In addition, the magazine rack can be refilled and removed at will, and can be adapted to high-mix, low-volume production.

Structure of the Invention The round-type magazine conveyor device of the present invention includes two magazine lifting and lowering devices, front and rear, for lifting and lowering a magazine rack to carry in and carry out printed circuit boards.
In the meantime, the magazine racks are stored, and the magazine racks are automatically transported and unloaded from the magazine conveyor, which has a two-stage configuration of upper and lower stages with different conveyance directions, a magazine conveyor installed as a sub-conveyor of the above-mentioned conveyor, and the magazine lifting device from the sub-conveyor. It consists of a magazine moving device that makes it possible to move the magazine.
By adopting such a structure, the stock amount of the magazine rack is increased, the magazine rack can be replenished at will, empty magazines can be taken out at will, and it can be adapted to high-mix, low-volume production.

DESCRIPTION OF EMBODIMENTS Description will be made with reference to FIGS. 1 to 4, which are shown as an embodiment of the apparatus of the present invention. 1 is a magazine conveying device;
2 is a conveyor that stores magazine racks, 3
This is a magazine conveyor that increases the stock amount of the magazine rack of the second conveyor and makes it replenishable.
Reference numeral 4 designates a magazine moving device for automatically transporting magazine racks from the magazine conveyor 3 to the magazine transport device 5. 6 is a magazine rack for storing printed circuit boards; 7 is a magazine lifting device provided for raising the magazine rack and storing printed circuit boards; 8 is a magazine provided for lowering the magazine rack and supplying printed circuit boards. Lifting device, 9 is a magazine conveyor that stores empty magazines, 10 is a magazine conveyor that increases the storage capacity of the 9 conveyor and also makes it possible to take out magazines even when the magazine rack is full, 11 is 1
This is a magazine moving device that automatically transports empty magazine racks to a conveyor. Also, 12, 13, 1
4, 21, and 27 are switches for detecting the presence or absence of a magazine rack. Reference numerals 19, 20, 26 and 28 are limit switches indicating the row limit and return limit of the magazine rack moving tables 17 and 24. Motors 15 and 22 move the tables 17 and 24 via sprockets 17 and 23 and chains 18 and 25.

Next, the operation will be explained. As shown in FIGS. 1 to 4, when the magazine lift device 7 is located at the upper limit, the magazine rack 6 is moved from the magazine transport device 1.
is carried out to magazine conveyor 2, and switch 1
2, 13, 14, and 21 and reaches the magazine transport device 5, the magazine rack begins to descend by the magazine lifting device 8, and the magazine rack reaches its lower limit while supplying printed circuit boards to the secondary side.
Then, the magazine rack passes through the switch 27 of the magazine moving device 11 and is carried out to the magazine conveyor 9. Normally, it operates in the same way as such a conventional magazine conveyor, but on the other hand, when the magazine conveyor 9 is full of empty magazine racks, the motor 22 of the magazine moving device 11 operates,
The table 24 moves through the sprocket 23 and the chain 25, and when it comes into contact with the limit switch 28, the magazine rack is automatically carried out to the magazine conveyor 10, and the magazine rack can be taken out manually. Also magazine conveyor 2
When the magazine rack runs out, the motor 15 of the magazine moving device 4 operates, the table 17 moves via the sprocket 16 chain 18, and when it comes into contact with the limit switch 20, the magazine conveyor 3 that has been manually replenished in advance is activated.
The upper magazine rack is transported to table 17,
When the switch 21 is turned on, the table 17 returns to the state shown in FIG. 1 and comes into contact with the limit switch 19.
Then, the magazine rack is carried out to the magazine transport device 5, and the structure is such that the printed circuit board can be supplied to the secondary side.

In the device configured as described above, by placing magazine conveyors in parallel and providing a magazine moving device that automatically carries magazine racks into and out of the magazine lifting device, it is possible to increase the stock amount of magazine racks, and also to manually replenish and remove magazine racks. Empty magazine rack can be taken out.

Although the magazine conveyors are arranged in parallel in this embodiment, they may be arranged vertically or may be fed by other moving devices.

Effects of the Invention Since the round type magazine conveyor device of the present invention has the above-described configuration, the magazine conveyor is provided with a sub-conveyor, and a magazine moving device is provided for automatically carrying in and out magazine racks from the sub-conveyor to the magazine lifting device. As a result, the stock amount of the magazine rack can be increased, the magazine rack can be manually refilled and taken out as desired, and it can also be applied to high-mix, low-volume production.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a round magazine conveyor device showing an embodiment of the present invention. Fig. 2 is a front view of the same device, Fig. 3 is a left side view of the same device, Fig. 4 is a sectional view taken along line A-A in Fig. 2, and Fig. 5 is a schematic front view of a conventional magazine conveyor. Figure 6 is a plan view of the same. 1, 5... Magazine transport device, 2, 3, 9, 1
0... Magazine conveyor device, 4, 11... Magazine moving device, 6... Magazine rack, 7, 8...
...Magazine lifting device.

Claims (1)

[Claims] 1. A magazine lifting device with two front and rear sides that lift and lower magazine racks to carry in and take out printed circuit boards, a magazine conveyor device that stores magazine racks between them and has a two-stage structure with an upper stage and a lower stage and different conveyance directions; A round-type magazine conveyor consisting of a magazine conveyor device that can increase the stock amount of magazine racks and replenish them as a sub-conveyor of the conveyor, and a magazine moving device that can automatically carry magazine racks in and out from the sub-conveyor to the magazine lifting device. Device.