JPH04100300A - Board transfer device - Google Patents

Abstract

PURPOSE:To prevent the accumulation of substrates sent from the preceeding process, by making a pair of guide plates arranged so as to face each other retain a transfer means transferring substrates in the bridged state, installing a driving means which drives at least one side of the guide plates and changes the mutual distance of the guide plates, and controlling the driving means on the basis of a signal showing the substrate transfer state of the following process. CONSTITUTION:The interval between a first guide plate 18a and a second guide plate 18b is made to coincide with the width of a substrate 2. When substrates 2 are carried from a pre-process equipment like a reflow equipment, and a first substrate detection sensor 29 detects the substrates 2, a belt is driven, and the substrates are 2 transferred until a second substrate detection sensor detects the substrates 2. When the substrates 2 are detected, the rotation of motors 24a, 24b are interrupted, the substrates are made to await orders at the position. Whether a substrate carrying-out inhibition signal (g) is inputted from an operating state detection part 31 of an elevator equipment 3 and a magazine transfer equipment 4 is judged. In the case where the signal is not inputted, the substrates 2 are pushed by a substrate accommodation pusher 28, and carried out onto the elevator equipment 3. After that, the substrates are carried out onto the following process, via the elevator equipment 3 and the magazine transfer equipment 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a board transport device used for transporting a printed circuit board (hereinafter referred to as a board) after beam flow treatment to an elevator device.

(Prior art) Generally, printed circuit boards are manufactured by printing solder paste on the wiring board and mounting the components, then remelting (reflowing) the solder in a high temperature atmosphere and soldering, and then soldering. A printed circuit board is manufactured through a number of processes, including the process of transporting it to an unloader, and a board transfer device is provided to bridge each process.In such a board transfer device, Generally, the substrates are continuously transported to the next process at regular intervals.

(Problem to be Solved by the Invention) Incidentally, an elevator device is sometimes provided in the next process of the substrate transport device, but since the elevator device is operated depending on the situation of the subsequent devices and is generally not operated in tact, From time to time, board transport may be interrupted.

Even when transport is interrupted in this way, new printed circuit boards may be sent one after another from the previous process, but in such cases, the board transport device described above will Collisions and stagnation may occur, which may result in the inability to perform appropriate line management. especially,
If a reflow device or the like is provided upstream of the line, the substrate may deteriorate due to prolonged heating and become unusable.

The present invention has been made with the aim of solving the above-mentioned problems, and provides a board transfer device that does not cause the printed circuit boards that are sequentially sent from the upstream side to remain even when an elevator device is provided on the downstream side of the transfer. The purpose is to provide.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a substrate transport device that transports a substrate transported from a previous process to a next process, in which a pair of guide plates are arranged facing each other. a driving means for supporting a transporting means for transporting the substrate in a cross-linked state and driving at least one of the pair of guide plates to change the distance between the pair of guide plates; The present invention is characterized in that a control means is provided for controlling the driving means based on a signal indicating the conveyance status.

(Function) Since the present invention is configured as described above, when a signal indicating the substrate transport status of the next process is input to the control means while the transport means is sequentially transporting the substrates, the control means responds to the content of the signal. The driving means is controlled to move one of the guide plates, and as a result, the distance between the pair of conveying means increases, and the substrates fall from between the pair of conveying means and are sequentially sent from the previous process ( Do not allow the substrate to accumulate.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 8.

In the figure, l is a substrate transport device that transports the substrate 2, 3 is an elevator device provided on the unloading side of the substrate transport device 1,
Reference numeral 4 denotes a magazine conveying device that carries the magazine 5 into the elevator device 3 and carries out the magazine 5 on which the board 2 is mounted.

An elevator base 8 supported by a pole screw 6 and a slide shaft 7 is attached to the elevator device 3. A gear unit 9 for driving the pole screw 6 is connected to the pole screw 6 so as to move the elevator base 8 up and down.

The magazine 5 is transferred to the magazine transport device 4 by the elevator device 3.
A magazine carrying-in conveyor 10 is provided to carry the magazine 5 in, and a magazine carrying-out conveyor 11 which receives the magazine 5 from the elevator device 3 and carries it out to the next process.

The substrate transfer device i1 has a pedestal 6 in which a substrate mounting portion 12 is formed in the center, and a substrate transfer line M is provided on the pedestal 13.
A first plate-shaped bracket h 14a located on both sides of the board 2 and two plate-shaped second brackets 14b and 14b arranged in the direction of conveyance of the board 2 (in the direction of the six arrows) are provided in parallel. . The part of the first bracket 14a on the arrow A direction side and the second bracket 1 located on the same direction side
The first bearings 15a, 15a are fitted into the first bracket 14b, and the second bracket 14b, which is located in the opposite direction to the arrow A of the first bracket 14a and in the same direction, is fitted with a second bearing 15a. Bearings 15b, 15b are fitted.

A first pole screw 16a is fitted into the first bearing 15a, and a second pole screw 16b is fitted into the second bearing 15bJ5b. The first pole screw 16a and the second pole screw 16b each have a movable portion 17a.
, 17b are movably screwed together, and the movable parts 17a, 1
7b, a first guide plate 18a is attached along the six directions of arrows, and when the handle 19 attached to the first pole screw 16a is operated, the first guide plate 18a moves in the direction of arrow A. It is possible to move in the orthogonal direction (direction of arrow B).

The first guide plate 18a has a groove 20a having a rectangular cross section.
is formed horizontally toward the substrate transport line M.

An air cylinder 21 is attached to the first bracket 14a with its piston rod 22 facing the substrate transfer line M, and the piston rod 22 can be moved forward and backward under the control of a control means 23, which will be described later. ing.

The piston rod 22 has a second guide plate 18b (hereinafter referred to as the first guide plate 18b) opposite to the first guide 118a.
When collectively referring to a and the second guide plate 18b, the guide plate 1
It's called 8. ) is provided, and this second guide plate 1
A groove 20b having a rectangular cross section is formed in the groove 8b corresponding to the groove 20a of the first guide plate 18a.

Motors 24a and 24b that operate in synchronization with each other are attached to the first and second guide plates 18a and 18b, respectively. Pulleys 25a and 25b are attached to the rotating shafts of the motors 24a and 24b, respectively.The boots 2
5a, 25b have first and second guide plates 18a, 1
First and second belts 26a and 26b (hereinafter collectively referred to as belts 26) are wound around the belts 20a and 20b of the belts 8b, respectively. The belt 26 has grooves 20a and 20b in part in the guide plate 18.
The substrate 2 is cross-linked and placed on this exposed portion. Moreover, the first and second belts 26a, 2
6b is circulated and moved by the rotation of the motors 24a and 24b, and this movement transports the substrate 2 in the six directions of the arrows, and the belt 18 configured in this manner constitutes the transport means in this embodiment. .

A bushing holding plate 27 whose tip end is located on the substrate transport line M is attached to the pedestal 13, and a substrate storage bushing 29 is attached to the tip of the bushing holding plate 27.
It is attached so that it can move in the six directions of arrows and in the direction of arrow B. The board storage busher 29 is controlled by a control means 23, which will be described later, to move in the six directions of arrows and store the board 2 in the elevator device 3.

A first substrate detection sensor 30 is provided in an overhanging state at the upper part of the first guide plate 18a on the upstream side of the substrate conveyance.
is provided, and when the substrate 2 is conveyed below the first substrate detection sensor 29, it is detected and this detection signal is output. In addition, the first guide plate 1
A second substrate detection sensor 30 is attached to the downstream side of the substrate conveyance at 8a in the same manner as described above, and detects when the substrate 2 is conveyed to the lower side thereof, and sends this detection signal. It is designed to be output.

The elevator device 3 and the magazine conveyance device 4 are provided with an operating state detection section 3I. This operating state detection section 31
The board unloading stop signal is activated when the magazine unloading conveyor 11 has stopped for a certain period of time or the magazine 5 cannot be unloaded from the elevator base 8 for a certain period of time, and the board 2 cannot be loaded into the elevator device 3. g.

The operating state detection section 31 of the elevator device 3 and the magazine unloading device 4, the gear unit 9 of the elevator device 3, the driving means of the magazine unloading device 4, the first and second board detection sensors 29 and 30, and the motors 24a and 24b. is connected to the air cylinder 2I, and executes the calculation process described later to drive the motors 24a, 24b 8 and the air cylinder 2.
A control means 23 for controlling the first and the like is provided.

The control means 23 executes a control program and performs arithmetic processing according to signals from the first and second substrate detection sensors 29, 30, etc. Then, depending on the processing content, the substrates 2 are carried out to the elevator device 3 via the substrate conveyance line M, and loaded one after another into the magazines 5 prepared in the elevator base 8, and the loaded magazines 5 are transferred to the magazine carry-out conveyor 11. Each part is controlled so that the material is transported to the next process via. Further, the control means 23 performs the process shown in FIG. 8 depending on whether or not the substrate unloading stop signal g is input, and drops the substrate 2 on the magazine conveying device 4 onto the substrate mounting section 12 to move the substrate onto the substrate conveying line M. Control each part so that it comes off.

That is, it is determined whether or not the substrate unloading stop signal g has been input (step SL). If the determination is YES, the air cylinder 21 is controlled and the second air cylinder 21 is activated as shown in FIGS.
The board 2 is moved by moving the guide plate 18b in the direction opposite to the arrow B to widen the distance between the first and second belts 26a and 26b.
is dropped (step S2). Note that this step S
If the determination in step 1 is NO, each part will be controlled to carry out the substrate 2 to the next process as described above.

The operation of the substrate transport device 1 configured as above will be explained.

First, depending on the size of the board 2, operate the pole screw 6 to adjust the movable parts 17a and 17b and move the first guide plate 18.
a and adjust the interval between the first belt 18a and the second belt 18b to match the width of the substrate 2. When the substrate 2 is carried in from the apparatus and detected by the first substrate detection sensor 29, the belt 18 is driven and the substrate 2 is transported until the second substrate detection sensor 30 detects the substrate 2. The substrate detection sensor 30 of No. 2
When this is detected, the rotation of the motors 24a and 24b is stopped, and the board 2 is temporarily put on standby at that position. Here, it is determined whether or not the board unloading stop signal g is input from the operating state detection unit 31 of the elevator device 3 and the magazine transport device 4. If it is determined that the board unloading stop signal g is not input, the board 2 is pushed into the board storage button 28. The magazine is then transported to the elevator device 3, and then transported to the next process via the elevator device 3 and magazine transport device 4.

In addition, in determining whether the board unloading stop signal g is input or not,
When it is determined that the substrate unloading stop signal g has been input, the air cylinder 21 is controlled to move the second guide plate 18b in the direction of arrow B to widen the interval between the first and second belts 26a and 26b. As a result, the substrate 2 falls and is removed from the substrate transport line M. Therefore, it is possible to prevent the substrate 2 from staying in the substrate transport line M and being overheated by the pre-process glue flow device and deteriorating in quality.

In addition, in this example, the target is a process in which an elevator device is provided as the next step, but the present invention is not limited to this. It goes without saying that the process may be used as a target. By widening the distance between the substrates and allowing the substrates to fall from the relevant section and retreating from the substrate transfer line, even if substrate transfer is interrupted in the next process, the substrates that are being sent sequentially from the upstream side can be Appropriate line management can be achieved without stagnation.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a substrate transfer device according to an embodiment of the present invention, Fig. 2 is a front view of the same device, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 2, and Fig. 4 is the first
5 is an enlarged view of the circle V in FIG. 4, and FIGS.
The figures show an example of the operation of the device; FIG. 6 is a sectional view showing the normal state, FIG. 7 is a sectional view showing the state where the board is dropped, and FIG. It is a flowchart which shows a part. 1... Board transfer device 2... Board 3... Elevator devices 18a, 18b... First and second guide plates 21...
・Air cylinder 23...control means

Claims (1)

[Claims] (1) In a substrate transport device that transports the substrate transported from the previous process to the next process, a transport means for transporting the board in a cross-linked state is supported by a pair of guide plates disposed facing each other, and the pair of drive means for driving at least one of the pair of guide plates to change the mutual distance between the pair of guide plates, and a control means for controlling the drive means based on a signal indicating the substrate transport status of the next step. A substrate transfer device characterized by: