JPH06298304A - Conveyor system - Google Patents

Abstract

PURPOSE:To provide a conveyor system which is able to convey an every possible mounting system base plate surely in a highly efficient manner and prevent the running cost from increasing. CONSTITUTION:This conveyor system consists of a receiving mechanism installed in a buffer stage 1 in order to house a base plate in a conveying magazine 8, both upper and lower conveyors 3 and 6 set up for conveying this conveying magazine, and a base plate delivery mechanism 5 for feeding a postprocess with the base plate in the conveying magazine piece by piece. In addition, it is provided with both loader and unloader lifters 2 and 4 being intermittently liftable, installed at both ends of these upper and lower conveyors 3 and 6 in order to circulate the conveying magazine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrying device for carrying a board or the like having electronic parts mounted thereon.

[0002]

2. Description of the Related Art As described in JP-A-59-163899, a conventional carrier device for efficiently carrying a substrate or the like having electronic parts mounted thereon is used to carry a plurality of substrates once housed in a magazine rack. In the subsequent process, a method of retrieving and supplying only the substrates one by one was adopted again.

Further, as a method for surely transporting a substrate after mounting electronic components to a soldering process without misalignment of components, as shown in JP-A-4-88696 and 4-88697, a solder paste is applied and a soldering iron is applied. The method of temporary fixing and carrying was used.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
According to the conventional technique described in 3899, it is possible to convey a plurality of substrates at one time, but when the tact of the previous process is larger than that of the subsequent process, the subsequent process is performed while the magazine rack is fully loaded with the substrates. There is a problem that the tact balance cannot be maintained because the substrate is in a waiting state.

Further, the above-mentioned Japanese Patent Laid-Open Nos. 4-88696 and 4-8.
The conventional technique described in 8697 is suitable for a TAB (tape automated bonding) type mounting component, but has a problem that it is not suitable for a component mounted by a flip chip type.

It is an object of the present invention to provide a carrier device capable of reliably and efficiently carrying substrates of any mounting method without increasing running costs.

[0007]

In order to achieve the above object, a transfer apparatus of the present invention is provided with a receiving mechanism for storing substrates in a transfer magazine and two upper and lower stages for transferring the transfer magazine. Conveyor, a delivery mechanism for supplying the substrates in the transfer magazine to the subsequent process one by one, and the transfer magazine is circulated so that the conveyor is intermittently moved up and down at both ends. It is composed of a possible lifting mechanism.

Further, in order to keep the cleanliness inside the apparatus constant, the carrying apparatus of the present invention is preferably provided with a mechanism for supplying and discharging clean air. In addition, control means is provided for determining the optimum number of substrates to be stored in the transport magazine in response to a signal from the detection means for detecting the processing state of the subsequent process, thereby controlling the transport of the transport magazine. Preferably.

Further, it is preferable to provide a vibration suppressing mechanism in the drive section of each mechanism. For example, for a receiving mechanism that receives a substrate from a previous process, a payout mechanism that supplies a substrate to a subsequent process, and a lifter lifting mechanism, a motor is used as a drive source, a timing belt is used for drive transmission, and a low expansion round belt is used. Is preferably adopted. Also, use a shock absorber at the tip of the pusher that comes into contact with the substrate being transported,
It is preferable to adopt a free roller conveyor as the conveyor.

[0010]

Since the circulation system of the conveying magazine by the upper and lower two-stage conveyor and the elevating mechanism provided at both ends thereof is adopted, the substrate can be surely and highly efficiently conveyed.
In addition, a buffer function capable of collective transport can be obtained by using a transport magazine that can store a plurality of substrates. Furthermore, the running cost can be reduced by feeding back the processing status of the subsequent process to the sequencer and performing automatic optimum control of the stagnation time in the conveyor and the number of consolidations.

By supplying clean air to the device through a clean filter and discharging the clean air, foreign substances floating in the device and dust generated from the operating part can be efficiently removed. Furthermore, since the conveyor magazine circulation system using the upper and lower two-stage conveyors makes it unnecessary to open and close the device door, and keeps the cleanliness constant by shutting off from the outside, and prevents the cleanliness from decreasing.

Further, by using a motor as a drive source,
Transport at a two-step speed is realized, and the transport time can be shortened. The unique vibration generated when the motor rotates is
The shock absorption material attached to the tip of the drive absorber absorbs the timing belt and the low expansion round belt, and the shock generated when the pusher comes into contact with the board is minimized. Can be carried. In addition, the use of a free roller conveyor in the transfer mechanism also enables low-vibration transfer. Also, the free flow function can be easily obtained. Then, instead of mechanical stop by the stopper, deceleration stop is performed by the roller rotation stop method by the sensor, and vibration acceleration can be suppressed to the minimum.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a carrying device of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of the transport device. The present apparatus is composed of a buffer stage 1, a loader lifter 2, an upper conveyor 3, an unloader lifter 4, a substrate delivery mechanism 5, and a lower conveyor 6. Air that has passed through a clean filter is supplied from a clean air supply port 7 installed on the upper part of the device, and is discharged from the lower part of the device to remove foreign matters floating inside the device and dust generated from the operating part. Further, since the conveying magazine 8 is circulated by the upper conveyor 3 and the lower conveyor 6, the opening and closing of the apparatus door is not necessary, so that the exterior can be shut off. Therefore, it is possible to always maintain a constant cleanliness inside the apparatus and prevent the deterioration. Furthermore, since the upper conveyor 3 conveys the actual magazine containing the substrate and the lower conveyor 6 is for collecting the empty magazine after the substrate has been discharged, even if dust is generated inside, foreign substances that fall are attached to the substrate. There is no fear.

FIG. 2 is a schematic view of a substrate receiving mechanism provided on the buffer stage 1. This mechanism receives the electronic component mounted board delivered from the mounting machine in the previous process,
Depending on the processing status of the subsequent process, an operation of storing one or a plurality of sheets, for example, 10 sheets each in the transport magazine on the right side of the drawing is performed. When storing multiple boards,
The loader lifter 2 shown in (1) is intermittently lifted, and when the loader lifter 2 is stopped, the substrates are successively stored in the conveyance magazine at the equally partitioned portions. The rotary motion of the motor 9 which is the drive source of this mechanism is converted into a linear motion and transmitted to the pusher 12 via the pulley 10 and the low expansion round belt 11. The low-expansion round belt 11 also has a role of absorbing the unique vibration generated when the motor 9 rotates and preventing it from being transmitted to the pusher 12. Furthermore, the shock absorbing material 13 attached to the tip of the pusher 12 can minimize the shock given to the mounted electronic components when coming into contact with the substrate which is the object to be conveyed.

The carrying device shown in FIG. 1 has a control means (not shown). This control means receives the signal from the detection means for detecting the processing state of the subsequent process, determines the optimum number of substrates to be stored in the transfer magazine as described above, and thereby the transfer magazine of the transfer magazine is transferred. To control.

Next, an elevating mechanism for the loader lifter 2 and the unloader lifter 4 will be described. As shown in FIG. 1, the loader lifter 2 receives an empty transfer magazine 8 from the lower conveyor 6, then stores the substrate at the transfer position of the buffer stage 1, and then transfers the transfer magazine 8 to the upper conveyor 3. It is supplying. In addition, the unloader lifter 4
Is a carrying magazine 8 that has been carried on the upper conveyor 3.
Is received, the substrates are supplied one by one at the reflow device loading position in the subsequent process, and the empty transport magazine 8 is supplied to the lower conveyor 6.

In the drive transmission system of the lifter lifting mechanism shown in FIG. 3, the motor 14 is driven directly by the ball screw 17
The belt drive system is used in which the transmission is performed via the timing pulley 15 and the timing belt 16 instead of being transmitted to From this, the same effect as the low expansion round belt 11 described in the substrate receiving mechanism of FIG. 2 can be obtained. Further, when there is no carrying magazine 8 on the lifter, that is, when the loader lifter 2 side is lowered and when the unloader lifter 4 side is raised, the feeding speed can be made high to shorten the carrying time. The rotation of the ball screw 17 is transmitted to the ball bearing of the lifter, and the lifter moves up and down.

FIG. 4 shows a substrate delivery mechanism. This mechanism performs the operation of supplying the substrates housed in the transport magazine 8 one by one to the reflow device in the subsequent process. The mechanical structure and aim are the same as those of the substrate receiving mechanism described in FIG. 2, but here, by using the stepping motor 18 as a drive source, the pusher 19 is sent at high speed up to the point before the pusher 19 comes into contact with the substrate, and before the contact comes. You can decelerate all at once and send at a low speed until the payout limit. Further, it is possible to perform a payout operation at a two-step feed speed, in which the paper is fed at high speed from the payout limit to the return limit. In addition, the pulley 10,
The actions of the low expansion round belt 11 and the impact absorbing material 13 are the same as those described in FIG.

FIG. 5 shows a schematic view of the transport mechanism of the upper conveyor and the lower conveyor. This mechanism includes a roller shaft 20,
It is composed of a press-fitting roller 21, a free roller 22, and a drive belt 23. Therefore, it is possible to easily add the stopper 24 for the purpose of the free flow function only by removing the free roller 22 near the stopper 24. Further, even when the carrying magazine 8 is stopped on the conveyor, it is not a mechanical stop applied to the stopper 24, but each stopper 2
A pair of sensors 25 installed near 4 detects the transport magazine 8 and stops the rotation of the conveyor before contacting the stopper 24, thereby decelerating and stopping to minimize vibration acceleration. It can be suppressed to the limit.

As described above, according to the present embodiment, the board can be reliably and highly efficiently transported, the running cost is reduced, and even if the board is liable to be misaligned immediately after mounting the electronic parts, The flux can be used to reliably convey the product with the fixing force used during mounting, eliminating the need for a new temporary fixing function. As a result, it is possible to reduce the manufacturing cost of the device, shorten the transportation time, and simplify the process device. Further, it is possible to realize a transport device that prevents foreign matter from entering and adhering to the electrical joints and the like.

[0021]

As described above, according to the present invention,
Substrates of all mounting methods can be transported reliably and with high efficiency, and running costs can be reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a carrying device of the present invention.

2 is a schematic diagram of a substrate receiving mechanism provided on a buffer stage of the transfer device shown in FIG.

FIG. 3 is a schematic view of a lifter lifting mechanism of the transfer device shown in FIG.

FIG. 4 is a schematic view of a substrate delivery mechanism of the transfer device shown in FIG.

5 is a schematic view of a transport mechanism of the transport device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Buffer stage 2 ... Loader lifter 3 ... Upper stage conveyor 4 ... Unloader lifter 5 ... Substrate delivery mechanism 6 ... Lower stage conveyor 7 ... Clean air supply port 8 ... Conveying magazine 9, 14 ... Motor 10 ... Pulley 11 ... Low expansion round belt 12 , 19 ... Pusher 13 ... Impact absorbing material 15 ... Timing pulley 16 ... Timing belt 17 ... Ball screw 18 ... Stepping motor 20 ... Roller shaft 21 ... Press-fit roller 22 ... Free roller 23 ... Drive belt 24 ... Stopper 25 ... Sensor

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yoichi Fukuoka, 1 Horiyamashita, Hadano City, Kanagawa Pref., General Computer Division, Hitachi, Ltd. (72) Keiji Fujikawa, 1 Horiyamashita, Hadano, Kanagawa Prefecture Factory General Computer Division

Claims (1)

[Claims] 1. A receiving mechanism for accommodating substrates in a transport magazine, conveyors installed in upper and lower two stages for transporting the transport magazine, and substrates in the transport magazine are supplied one by one to a subsequent process. In order to circulate the payout mechanism and the transport magazine, the transport device is provided with an elevating mechanism that is provided at both ends of the upper and lower two-stage conveyors and that can intermittently ascend and descend.