JPH05167292A - Thin board feeder - Google Patents

Abstract

PURPOSE:To enable beards to be stably and continuously fed to a following process by a method wherein a warpage correcting device which corrects the warpage of a board before a suction disc sucks the foremost board is provided, and the boards are fed to the warpage correcting device piece by piece. CONSTITUTION:A pair of thin board pressing devices 120 is provided to a thin plate feed device 1A. An air cylinder 121 is actuated when a thin board housing rack 8 is made to start moving toward a suction disc 31, pads 125 are made to protrude toward a foremost board 100 traversing a rectilinear optical axis to press the warped sides of the foremost board 100. With the leftward movement of the thin board housing rack 8, the board 100 is corrected in warpage, and the pads 125 and an adjusting rod 124 are pushed by the thin board housing rack 8 which is moving further leftward keeping the board 100 pressed between the pads 125 and made to recede resisting a coil spring 126. The rack 8 is made to stop at the moment when the foremost board 100 corrected by pressure traverses a rectilinear optical axis, and a thin board feed device is made to recover its starting state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin plate supplying device for supplying a thin plate such as an electric circuit printed wiring board to a subsequent step.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIGS. FIG. 3 is a front view of a conventional thin plate feeder, and FIG. 4 is a side view of the thin plate feeder shown in FIG. In FIG. 3, reference numeral 1 generally indicates a thin plate feeder. Such a thin plate supply device 1 is used to adjust the time difference because there is a time difference in the substrate processing in various steps in the process of manufacturing an electric circuit printed wiring board, for example. In the following description, an electric circuit printed wiring board will be described as an example of a thin plate, and the electric circuit printed wiring board will be simply referred to as “substrate” hereinafter.

The thin plate feeding device 1 is basically composed of a conveying device 2, a suction device 3, a charging device 5, and a thin plate position detector 7. The transport device 2 has a rotary shaft 21.
And two rollers 22 and 2 fixed to the rotary shaft 21.
3, rollers 25 and 26 that are respectively paired with these and are fixed to a common rotating shaft 24, and these two pairs of rollers 2
2, 23, 25, and 26, and is composed of a pair of endless belts 27, 28 that are driven, and these endless belts 27, 28 are not shown, for example,
As the rotating shafts 21 and 24 are reversibly driven to rotate by an electric motor, they are driven to the left and right in the figure, as will be described later.

Next, the suction device 3 drives a plurality of suction plates 31 arranged in parallel to the reference plane, hollow pipes 32 to which the suction plates 31 are attached, and the hollow pipes 32. An air cylinder 33, a hose 34 connecting the hollow pipe 32 and an air suction device (not shown), and a supporting device 35 for supporting them. This support device 35 has a body part 3
6 is formed in a channel structure with an inverted U-shaped cross section,
Bearing rollers 37 and 38 are attached to both ends thereof. The other end of the body portion 36 is attached to the mounting substrate 4
It is fixed at 0. The support plate 9 is attached to the substrate 39 fixed to the chassis of the thin plate feeder 1 through an air cylinder (not shown), by the air cylinder.
It is attached so as to move up and down in parallel with the substrate 39. Further, the mounting substrate 40 is provided on the upper surface of the support plate 9.
Is fixed, and the air cylinder 33 is attached to the attachment substrate 40 via a spacer 41 with bolts or the like.
It is fixed. The hollow pipe 32 includes a pair of side plates 42.
Is supported by a support block member 43 fixed to
The pair of side plates 42 are fixed to the side edges of the mounting plate 44. This mounting plate 44 has a pair of rod receivers 4
5, 46 are fixed and these rod receivers 45,
Rods 47 and 48 projecting from both ends of the air cylinder 33 are respectively fixed to 46. Therefore, by turning on / off the air cylinder 33, the suction cup 3
1 and the like can be moved forward and backward in the direction of arrow Xa.

Next, the structure of the charging device 5 will be described. The feeding device 5 is arranged on both sides of the rotary shaft 50 pivotally supported by the chassis of the thin plate feeder 1 and the suction device 3 and the support device 35, and the bases 51 and 52 are fixed to the rotary shaft 50. The other end 53, 54 is composed of a pair of arms 57, 58 to which the input claws 55, 56 are fixed. Further, the other ends 53, 54 of the arms 57, 58 are provided with elongated guide plates 59, inside the respective input claws 55, 56.
60 is fixed to each of the arms 57 and 58 substantially vertically. Each of these arms 57 and 58 rotates in the direction of arrow Y (FIG. 4) with the rotation of the rotary shaft 50, and as described later, functions to lift up a plurality of substrates 100 one by one.

Reference numeral 7 is a thin plate position detector that is composed of a light emitting device 70 and a light receiving device 71 and performs photoelectric conversion. At the moment when the substrate 100 crosses the optical axis of the thin plate position detector 7,
The light receiving device 71 is arranged so that the thin plate storage rack 8 described later is stopped.
With the output signal of, the power supply for driving the carrying device 4 is turned off.

Next, the portable thin plate storage rack 8 mounted on the thin plate feeding apparatus 1 will be described. This thin plate storage rack 8 has frames 80, 81, 82 and 83 made of square members of the same size that form the same inclined plane H, and, as shown in FIG. And a back plate 84 having a receiving surface V of the substrate 100 inclined to the right, and the connecting rod 85 connects the frame 8 to the frame 8.
The lower surface of one end of each of 0, 81, 82, and 83 is connected, and the other end thereof is fixed to the lower end of the back plate 84. The distance between the frames 80 and 81 and the distance between the frames 82 and 83 are sufficiently wide, and the board in which the loading claws 55 and 56 of the loading device 5 are housed in the thin plate housing rack 8 are located between these spaces. Extending below 100,
It is configured to be able to rotate up and down. Such a thin plate storage rack 8 is a substrate 10 processed in the previous processing step.
0 are aligned and leaned diagonally on the back plate 84 to be accumulated, and are transported and mounted on the endless belts 27 and 28 of the transport device 2 as shown in these figures in order to be sent to the subsequent processing step. Is done.

Next, the operation of the thin plate feeder 1 will be described. As described above, the thin plate storage rack 8 that stores the plurality of substrates 100 is mounted on the endless belts 27 and 28. At the time of this mounting, the air cylinder support plate 9 (not shown) is lifted slightly upward. Therefore, the whole supporting device 35 of the suction device 3 also goes up, and its bearing rollers 37, 38 also go up. In this state, the frames 80, 81, 82 and 83 of the thin plate storage rack 8 are inserted below the bearing rollers 37 and 38 so that the bearing rollers 37 and 38 can rotate on the plane H of the frames 81 and 82, respectively. Thus, the thin plate storage rack 8
By driving the carrier device 2 mounted with, the plurality of substrates 100 are simultaneously moved in the left direction of the arrow Xb, that is, horizontally toward the suction device 3. The front substrate 100 on the suction device 3 side
The moment when the light intercepts the linear optical axis of the thin plate position detector 7 (suction plate 3
1 is a reference position where the substrate 100 can be adsorbed), the light receiving device 71
The conveying device 2 is stopped by the stop signal generated on the output side of the. The air cylinder 33 of the suction device 3 operates in such a position of the substrate 100, the suction plate 31 projects rightward in the direction of the arrow Xa, and abuts against the frontmost substrate 100,
The one substrate 100 is sucked by an air suction device connected to the hose 34. When the substrate 100 is sucked, the air cylinder 33 works in the opposite direction, and the suction plate 3
1 is moved to the left of the arrow Xa, and one substrate 10 sucked
Bring 0 onto the input claws 55, 56 of the input device 5. Then, the arms 57 and 58 immediately rotate upward, and the insertion claw 5
The lower edge of the substrate 100 is supported by the U-grooves 5 and 56, the surface of the substrate 100 is supported by the guide plates 59 and 60, and the substrate 100 is lifted while rotating upward. It works so as to send it to the process transfer conveyor 110.
When the substrate 100 is sent in, the loading device 5 returns to its original state. Further, during this operation, the transfer device 2 also moves along the arrow Xb.
Driven to the right, the thin plate storage rack 8 retracts from the suction device 3 and stops, and stands by for transporting the next substrate 100. Then, the above-described substrate loading operation is repeated for each one, and a predetermined number of substrates 100 are conveyed to the next step.

[0009]

However, as the substrate 100 undergoes various steps and as time passes in the thin plate storage rack 8, the substrate 100 warps as shown in the drawing. If this warp occurs on the front substrate 100 leaning against the thin plate storage rack 8, when the thin plate storage rack 8 moves toward the adsorption device 3 (to the left of the arrow Xb) as described above, the front substrate 100 Both ends of the plate cross a predetermined position, that is, the straight plate optical axis of the thin plate position detector 7 early, and a stop signal generated in the light receiving device 71 causes the frontmost substrate 100 to stay before the predetermined position. The rack 8 stops. Therefore, the suction plate 31 of the suction device 3
Does not reach the central portion of the foremost substrate 100, the foremost substrate 100 cannot be adsorbed, resulting in adsorption failure, and the thin plate feeder 1 stops the automatic operation and the work is interrupted.
This leads to a decrease in production efficiency. The present invention aims to eliminate such inconvenience.

[0010]

Therefore, according to the present invention,
In the thin plate supply device as described above, a correction device for correcting the warp of the front substrate before the suction plate sucks the front substrate is provided so that the substrates can be supplied one by one.

[0011]

Therefore, according to the thin plate feeder of the present invention, even if the substrate is warped, the warpage can be corrected.
The substrate can be stably and continuously supplied to the next step.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a plan view of the thin plate feeder of the present invention, and FIG. 2 is a side view of the thin plate feeder of FIG. The same components as those of the prior art thin plate feeder shown in FIGS. 3 and 4 are designated by the same reference numerals, and the description of their configurations and operations will be omitted.

In the thin plate feeder 1A of the present invention, the thin plate feeder 1 of the prior art is provided with a pair of thin plate pressing devices 120. These thin plate pressing devices 120 include an air cylinder 121, a collar 123 fixed to the tip of a rod 122 thereof, an adjusting rod 124 which can be inserted into the inside from the tip of the collar 123, and a stroke thereof, and a tip of the adjusting rod 124. Between the pad 125 fixed and attached to the pad 125 and the collar 123,
It is composed of a coil spring 126 wound around the adjusting rod 124. These thin plate pressing devices 120 have the same structure. The air cylinders 121 of the thin plate pressing device 120 are fixed to the lower surfaces of the outermost ends of the substrate 39. Further, the position of each pad 125 is such that it does not interfere with the linear optical axis of the thin plate position detector 7, and the tips of these pads 125 are on the right side of the linear optical axis during the initial operation of these thin plate pressing devices 120. The color 1 is positioned on the linear optical axis or slightly to the left of the linear optical axis when the pressing operation is completed.
23 and the adjusting rod 124 adjust and arrange.

The thin plate pressing device 12 having the above structure and arrangement.
0 simultaneously performs the following operations. That is, as described in the section [Prior Art], when the thin plate storage rack 8 starts to move to the left of the arrow Xb, that is, toward the suction plate 31, the air cylinder 121 is driven to move the pad 125. Is projected to the right of the arrow Xc, that is, across the straight optical axis toward the frontmost substrate 100, and the warped end faces of the frontmost substrate 100 are pressed. Along with the movement of the thin plate storage rack 8 to the left, its substrate 100
Warp is corrected, and while maintaining its pressed state,
Both pads 125 and the adjusting rod 124 are pushed by the thin plate storage rack 8 which still moves to the left, and retreat while resisting the coil spring 126. At the moment when the pressed and straightened frontmost substrate 100 crosses the straight optical axis, the thin plate storage rack 8 is stopped, and instead, the air cylinder 33 of the suction device 3 operates to cause the suction plate 31 to move to the front. Board 1
Adsorb 00. At the same time, the thin plate pressing device 120
The air cylinder 121 is turned off and is controlled to return to the original state. After that, the charging device 5 and the like operate, but the description thereof is omitted because it is the same as the operation of the conventional thin plate feeding device 1. As described above, the thin plate pressing device 120 operates, and each time the substrate 100 is sent to the next step, such an operation is almost instantaneously performed and repeated. The pad 125 is made of a soft material such as felt or rubber that does not scratch the surface of the pad 125 when it presses the substrate 100.

The warp of the substrate 100 may be the warp opposite to the warp in the illustrated direction. It is difficult for the thin plate pressing device 120 to correct such an opposite warp, but when such a warp occurs in the front substrate 100,
Since the suction plate 31 can sufficiently suck, the operation of the production line is not stopped.

[0016]

Therefore, according to the thin plate feeding apparatus 1A of the present invention, the presence of the thin plate pressing device 120 causes the substrate 100 to be removed.
Even if there is a warp, the substrate 100 can be stably supplied continuously to the next step without being affected by the warp, and therefore the productivity can be improved.

[Brief description of drawings]

FIG. 1 is a plan view of a thin plate feeder according to the present invention.

FIG. 2 is a side view of the thin plate feeder of FIG.

FIG. 3 is a front view of a conventional thin plate feeder.

FIG. 4 is a side view of the thin plate feeder shown in FIG.

[Explanation of symbols]

 1A Thin plate supply device 2 Conveying device 3 Adsorption device 5 Insertion device 7 Thin plate position detector 8 Thin plate storage rack 9 Support plate 31 Adsorption plate 55 Insertion claw 56 Insertion claw 100 Substrate (thin plate) 110 Conveyor conveyor 120 Thin plate pressing device 121 Air cylinder 125 pad

Claims (1)

[Claims] 1. A plurality of thin plates leaning against and stored in a container are adsorbed and taken out from the container one by one by an adsorption device, and the taken out thin plates are supplied to a next step by a feeding device. A thin plate feeding device, comprising: a straightening device that straightens the warp of the thin plate before the suction device sucks one thin plate.