JPH01110421A - Conveying direction changing device for rack type conveyer - Google Patents

Abstract

PURPOSE:To prevent a printed board from coming into contact further to improve loading efficiency by providing an optical axis of a phototube switch on a straight line connecting the bottom side of a load before change of direction to the upper side of a load after change of direction, in case of the captioned device for the printed board or the like. CONSTITUTION:Conveying a conveyer 3, loading a rack 1 before change of conveying direction, as shown by an arrow head, the conveyer 3 stops in a position 4 actuating a detector 8. Next the rack is conveyed by a conveyer 7 in a direction at a right angle. Since optical axes 21a-21c are arranged on a straight line connecting the bottom side of the rack 1 to the upper side of a rack 5, a printed board 2 on the rack 1 and a printed board 6 on the rack 5 can be simultaneously seen through. Accordingly, the printed board 2, in accordance with its protruding amount, intercepts the optical axes 21a-21c, and the printed board 6 is detached from the optical axis successively with the conveyance. Thus enabling a space of the rack, after change of direction, to be controlled to a necessary minimum limit in a range with the printed board not coming into contact, loading efficiency can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a conveying device for a plate-like object such as a board, for example, in the manufacture of printed circuit boards.

[Conventional technology]

The plate-shaped bodies 9, for example, printed circuit boards, are held approximately perpendicularly between racks to prevent them from coming into contact with each other and being damaged, and are transported by moving together with the racks. This rack is conveyed while changing direction during the manufacturing process.

The third factor is between the planes showing a conventionally used device for changing the conveyance direction of racks, in which the racks are conveyed from the left to the right. In the figure, (1) is the rack before direction change;
(2) A plate-like object 1, such as a substrate, housed in the rack (1) is sandwiched almost perpendicularly into the cut groove of the rack (1). (Conveyor 2 for carrying 31 racks (1), for example, a belt conveyor, (4! is a conveyor (31)
1) enters the direction change device and stops before changing direction, (51 is the rack after direction change, (6) is the +51K storage V73 board, (7) is the conveyor carrying (5) .

+81. (Detectors in each rack with 91 digits.

Next, the operation will be explained.

Rack before direction change transported from the left side (12 is (3)
The conveyor (31) is conveyed from left to right in the diagram until it reaches the stop position (4!), and the end of the rack (1) is detected by the detector C8- and stops.Next, the conveyor (7) The silk (1) is conveyed from the top to the bottom of the figure, and when it reaches the position (5), its end is detected by the detector (91) and stops.

As described above, the racks that came to the right in Figure 91 are conveyed to the bottom of Figure 1 by changing the conveyance direction one by one.

[Problem that the invention seeks to solve]

Since the conventional direction change device is configured as described above,
When transporting rack (11) to position (41), board (2)
In order to prevent the boards (6) stored in rank (5), which changed direction first, from coming into contact with each other, the distance between racks (4) and racks (5) was adjusted so that the boards stored in each rack did not come into contact with each other. The protrusion length from the rack must be greater than the total length (C) of Φ) and Φ). Therefore, the protrusion lengths (A) and (B) of the board were predicted according to the width of the board to be accommodated in the rack, and the rack +4! The detector (91) is placed at a position such that the interval (D) of , +51 is greater than or equal to (0).However, with this method, the rack T4!
10 Since the spacing (D) is constant, when the width of the board is small, the spacing is longer than necessary (the loading efficiency of the 71 is poor, so the spacing is shortened by 1), so a large number of racks can be mounted. Therefore, K had problems such as the need to change the position of the detector (9) according to the width of the substrate.

[Problem that the invention seeks to solve]

This invention was made in order to solve the above-mentioned problems. Regardless of the width of the substrates housed in the rack, the rack ill is placed at the position (4) with an interval of (41, +51). The purpose is to maintain the length of the moving vAK substrates (21, +61) so that they do not touch each other, and to obtain a direction changing device with good loading efficiency for the transport machine (71).

[Means for solving problems]

The conveyance direction changing device according to the present invention moves the rack after the direction change according to the size of the plate-like objects loaded on the next incoming rack before the direction change, so that the respective objects come into contact with each other. This is what I did.

[Effect]

The conveying machine for transporting the rack after the direction change according to the present invention starts and stops its operation by means of a plurality of phototube switches provided at positions where the rack before the direction change and the rack after the direction change can be seen simultaneously.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

(11 to +81 are the same as the conventional example, (21a) (21
b) (21c) are respective optical axes of optical axis tube switches not shown in the figure.

Next, the operation will be explained.

The transport machine (3) is loaded with the rack (1) before changing direction and is transported from left to right in Figure 0.4! When the end of the rack is detected by the detector 181, the rack stops. Next, the conveyor (
7) is activated, transports the rack at position (4!) from the top to the bottom in the figure, and stops when there is nothing blocking the optical axis of any of (21a), (2tb), and (21c).

At this time, the optical axes (21a), (21b), and (210) are connected to the substrate (2) that is held in the rack (1) before the direction change and the substrate that is held in the rack (5) after the direction change. (6
) so that you can see through the rack (1) at the same time.
When the substrate (2) is pushed out by the conveyor (3), (21a) (21b) (21c) (
7) Block the optical axis.

(When the rack at position 4! is transported by the conveyor 171, it is removed from the optical axis (21aX21b) (2tc) in order.

A phototube switch with an optical axis arranged as described above,
When the carrier (71) carries the rack (51), in the absence of the rack (1) that subsequently enters the direction changing device, the substrate (61
The board with the largest amount of protrusion stops at a position away from (21a), and the amount of protrusion of the board (21) becomes (21h).
) without cutting out ζ, the substrate (6) becomes (211
)) From scratch, it stops at the f position. The same applies to the optical axis (21c).

In the above embodiment, three optical axes are provided, but any number of optical axes may be used. Further, in the above embodiment, the load stored in the rack is a printed circuit board, but it may be a plate-shaped load or a block load.

〔Effect of the invention〕

As described above, according to this invention, an optical axis is provided in the range through which the load passes, and the rack that has already changed direction is evacuated according to the amount of load pushed out by the rack that is changing direction to the zeroth order. Therefore, the spacing between racks after changing direction should be the minimum necessary.
Even if the width of the board and the protruding lid are not constant, a large number of racks can be efficiently mounted on the transport device.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a direction changing device for a rack type conveyor for printed circuit boards according to an embodiment of the present invention. FIG. 2 is a side view of the same embodiment, and FIG. 3 is a plan view of the conventional example. In Figure 9, the same reference numerals indicate the same parts or the monk parts.

Claims (1)

[Claims] In the conveyance direction changing section of a device that conveys and stocks racks containing plate-like objects, the light of the phototube switch is placed on a straight line connecting the lower side of the load before the conveyance direction is changed and the upper side of the load after the conveyance direction is changed. Conveyance direction changing device for a rack-type conveyor equipped with a shaft.