KR100434458B1 - Elevator for multiple print board assembly production system, including carriage, timing belt, driving motor, limit switch, transfer unit, and guide shaft - Google Patents

Abstract

PURPOSE: An elevator is provided to effectively transfer a carrier passed through a soldering process from a first conveyor to a second conveyor. CONSTITUTION: An elevator(200) comprises a carriage on which a carrier is loaded; a timing belt(14) arranged at both sides of the carriage so as to transfer the carrier into the carriage; a driving motor(20) mounted on the carriage so as to rotate the timing belt; a limit switch(30) arranged at an end of the carriage so as to check whether the carrier is disposed at an accurate position; a transfer unit for moving the carriage in a vertical direction; and a guide shaft(50) for guiding the vertical movement of the carriage. The transfer unit includes a cylinder having a cylinder rod and arranged upright on a bottom plate(120); a movable arm arranged at an end of the cylinder rod; a fixed arm mounted with a sprocket wheel and fixed downward on a fixing plate(110); and a chain(47) having a side fixed at the carriage and the other side fixed at the fixing plate. The carriage moves in a vertical direction by the extension of the cylinder rod.

Description

Elevator in multi-flow mixed board assembly production system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-flow mixed printed circuit board production system, and in particular, a carrier on which a printed circuit board having several kinds of soldering operations is fixed is fixed to a lower conveyor line on an upper conveyor line. It's about the elevator that's used to return it.

Typically, factory automated assembly systems use conveyor belts to assemble printed circuit boards for electronic devices, either manually or automatically into the printed circuit board, depending on the work process. It is a system for assembling after soldering. However, in recent years, as the technology changes rapidly, the life cycle of the product is short, and thus, a new product that meets consumer needs must be produced in response to the technological change. When producing such products, consumers demand high quality and low price products, so the cost of production must be reduced to lower the price. It can be said that it depends on how the factory automation system is designed and the number of cancellation personnel is put in place at the right place in order to reduce the production cost and simplify the manufacturing process or reduce the man-hour.

1 is a configuration diagram schematically showing a process of a conventional assembly system of a printed circuit board.

As shown in FIG. 1, a printed circuit board loading box carries a plurality of printed circuit boards. The operator takes out the printed circuit board, puts it on the conveyor belt, and inserts the corresponding parts indicated in the component insertion guide while moving the printed circuit board slowly. Many workers insert only the assigned parts into the printed circuit board, and when the parts are inserted, the next worker removes the parts indicated in the parts insertion guide into the printed circuit board transferred to the conveyor belt and inserts them into the printed circuit board. do. In this way, a plurality of workers insert only the parts to which they have been assigned among the various parts, and then pass the conveyor belt to the next worker to complete the assembly work. When the parts are inserted into the printed circuit board by a plurality of workers, they are transferred through the conveyor belt to the spray flux. In the spray flux, the flux is applied to the transferred printed circuit board and is transferred to a soldering machine. The soldering apparatus transfers the solder by soldering the printed circuit board coated with the flux from the spray flux. The printed circuit board transferred through the soldering apparatus is cooled by a cooling fan. After soldering, the operator moves the cooled printed circuit board to the cutting device and cuts it. When the cutting is completed, it is passed to the next worker, and the next worker uses a component insertion detector to check whether the component is misinserted. This operation is repeated to assemble the printed circuit board.

However, the printed circuit board assembly system that proceeds to the above process can produce only one product, so every time the item of the product is changed, take out all the parts loaded in the parts container, and then the parts for assembling the changed product. , The conveyor belt must be installed according to the changed size of the printed circuit board, and the operator must be trained according to the new work, so as to prepare the production line according to the new product change. Workers were rested, which caused a problem of wasting manpower and productivity.

In order to solve this problem, it is disclosed in detail in 'multi-type mixed flow print board assembly production system and method' filed November 25, 1996.

Such a system is a system capable of assembling various types of printed circuit boards (different horizontal and vertical sizes of printed circuit boards respectively) into one production line. The operation of the system will be described as follows.

The mixed flow system assembles the printed circuit boards of various types according to the computer component insertion instruction information, and simultaneously assembles the cells for each cell and transfers them through the first conveyor of the work bench, and then the spray flux and the soldering device through the first conveyor line. Is transferred to. Subsequently, the carrier on which the soldered printed circuit board is fixed is transferred to the second conveyor by the elevator, and the conveyed conveyor is transferred to the lower conveyor of each platform through the second conveyor line. This is followed by a process of returning each cell by the lifter.

As described above, the device for feeding back the soldered carrier from the first conveyor line to the second conveyor line is an elevator, and an elevator of the present invention is provided to implement this process.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a carrier having a soldered product returned from a first conveyor line to a second conveyor line in a multi-mix mixed-circuit board assembly production system. To provide an elevator.

1 is a schematic configuration diagram of a conventional printed circuit board assembly system according to a conventional embodiment

Figure 2 is a perspective view showing the elevator of the multi-type mixed flow print board assembly production system according to an embodiment of the present invention

3 is a front view as seen in the X direction of FIG.

4 and 5 are front views showing an operating state seen in the Y-direction of FIG.

Explanation of symbols on the main parts of the drawing

10: carriage 20: drive motor

30: limit switch 50: guide shaft

60: Bracket 70: Chain cable protection member

90: transparent window 200: elevator

Hereinafter, with reference to the accompanying drawings will be described in detail the most preferred embodiment of the present invention. First, in describing each of the drawings, the same components have the same reference numerals as much as possible even though they are shown in different drawings. In describing the present invention, when it is determined that description of related known functions or configurations may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Figure 2 is a perspective view showing the elevator used in the multi-type mixed flow print board assembly production system according to an embodiment of the present invention, Figure 3 is a front view seen in the X direction of Figure 2, Figure 4 is the Y direction of Figure 2 Front view seen from.

As shown in Figures 2 to 4, the main components of the elevator as an embodiment of the present invention, the carriage (10) and the carriage that can be seated on the carrier fixed to the printed circuit board is completed soldering , A timing belt 14 installed on both inner sides of the carriage 10 to transfer the carrier in the front and rear directions, a drive motor 20 driving the timing belt 14 provided on the carriage 10, and the carriage. A limit switch 30 installed at one end of the inner surface of the side to check whether the carrier is in the correct position, a transfer means for raising and lowering the carriage 10, and guides the movement of the carriage 10. It consists of a guide shaft 50.

In addition, the cable connected to the drive motor 20 or the limit switch 30, etc., the chain-type cable protection member 70 and the protection in order to keep the carriage at the same time as the carriage of the carriage, to protect the environment from the external environment A support 71 on which the member 70 is safely installed is installed. In addition, the bracket 60 is prevented from being excessively loaded on the timing belt by deflection of the belt 14 due to the load of the carrier between the timing belts 14 installed to transport the carriers to the carriage 10. By fastening with a screw, it is installed symmetrically on both inner surfaces of the carriage 10.

In addition, in order to prevent injuries of the operator more easily check the operating state and at the same time to the removable frame by fixing the transparent window 90 to the box-shaped frame 100 for screws. In addition, the material of the carriage 10 is most appropriate is duralumin, a lightweight and wear-resistant material in consideration of simultaneous load in Shanghai.

The carriage 10 has a gear 11 coupled to the shafts 12 and 13 on both inner surfaces of the carriage 10 and the front and rear symmetry together with the timing belt 14 to allow the carrier to be continuously advanced and seated at the inlet 130. In addition, the drive motor 20 is installed below one side of the carriage 10. By providing another timing belt 24 between the motor gear 21 and the gear 11 of the drive motor, when the drive motor 20 rotates, the timing belt 24 also rotates, the other timing The belt 14 also rotates with power transmitted. That is, the carrier moves forward.

In addition, a limit switch 30 is provided on one side of the carriage (the direction in which the carrier moves forward) on the inner surface end. When the carrier is completely seated on the carriage 10, the limit switch 30 stops the rotation of the belt 14 by placing importance on the operation of the driving motor 20, thereby stopping the transport of the carrier.

In addition, in one direction of the carriage 10 (the direction in which the conveying means is installed), the vertical movement is coupled by the guide shaft 50 to make the vertical movement, and the guide rod 80 extending downward from the fixing plate 110. It supplements the role of limiting the movement of the carriage. That is, when the carriage is used in the upward direction, the rubber is attached to the end of the guide rod 80 serves to absorb the shock to some extent. The guide shaft 50 is a rod-shaped extending from the fixing plate 110 to the bottom plate 120, at least two or more must be installed symmetrically.

The conveying means is provided with a cylinder (41) in which the cylinder rod 42 is immersed and extended upright from the bottom plate 120, the sprocket wheel 44 is rotatably installed at the end of the cylinder rod 42 The moving arm 43 is fixed. In addition, the fixing plate 110, the sprocket wheel 46 is rotatably fixed to the fixing arm 45 is installed to face downward. After the fixed arm 45 and the movable arm 43 are installed in this manner, one side of the chain 47 is fixed to the carriage 10, and the chain 47 is engaged with the sprocket wheel 46. The chain is engaged with another sprocket wheel 44, and the other side of the chain 47 is fixed to the fixing plate 110. In this way, when the cylinder rod 42 is immersed and extended in accordance with the instruction of the limit switch 30 by engaging the chain, the carriage 10 on which the carrier is placed performs a lowering or upward movement.

According to the above configuration, the process of moving from the upper conveyor to the lower conveyor will be described in detail through an elevator.

When the carrier on which the printed circuit board is soldered is located immediately before the elevator, if the carrier is first detected by an optical sensor (not shown) located immediately before the elevator, and when the carrier is located The light sensor activates the stopper (not shown in the figure) so that the carrier continues to move forward without disturbing the stopper. Subsequently, when the drive motor 20 installed in the carriage is operated by the instruction of the photosensor and the timing belt 24 rotates, the timing belt 14 also rotates by the gear, and the carrier continues to move forward. Subsequently, when the carrier is completely seated in the carriage 10, the limit switch 30 is pressed by the weight of the carrier. At this time, the operation of the driving motor 20 is stopped by the limit switch 30, and thus the rotation of the timing belts 14 and 24 is also stopped.

As shown in Fig. 5, the carriage 10 is lowered by its own weight as the cylinder rod 42 of the cylinder extends upward by the controller of the PLC. Simultaneously as the cylinder rod moves up and down, it rises or falls. This unloading operation of the carriage 10 is caused to descend due to the self load of the carriage, which is a chain engaged with the sprocket wheel, in relation to the rise of the cylinder rod. In this case, the lowering of the carriage 10 is vertically lowered by the guide shaft 50. The chain is also moved by the engagement distance of the sprocket wheel, and finally the carriage stops at the exit 140.

At this time, the drive motor 20 is rotated in the reverse direction by the controller of the PLC, the timing belt 14 also rotates in the reverse direction to push the carrier toward the second conveyor to move from the first conveyor to the second conveyor by the elevator. Transfer is completed. The drive motor is the most suitable because the stepping motor (stepping motor) to be reversed.

When the carrier is completely removed from the carriage, it is confirmed by the sensor, and then the cylinder rod 42 is moved downward again by the controller of the PLC, and at the same time the carriage 10 is moved upward and the inlet ( 130) to the position. At this time, the chain 47 is again maintained in a tensioned state. Then, repeat operation is performed. That is, the driving motor 130 is stopped by the controller of the PLC through the optical sensor located immediately before the entrance, and when it detects that the carrier is located by the optical sensor, the driving motor by the controller of the PLC Starts operation in the forward direction and the carrier continues to advance until it is seated towards the carriage. At this time, the next carrier is stopped by the controller of the PLC using the optical sensor and the stopper until the carrier seated on the carriage descends and is transferred to the lower conveyor and the carriage is raised and positioned at the entrance.

As a result, the operation process of the drive motor or the optical sensor and the limit switch in which this operation is implemented is instructed by the PLC installed separately.

As described above, the present invention is effective in transferring a carrier from a first conveyor to a second conveyor in a multi-mix mixed-printed board assembly production system. On the other hand, in the detailed description of the present invention has been described with respect to specific embodiments, it is obvious to those skilled in the art that various modifications are possible without departing from the scope of the present invention.

Claims (6)

In the multi-flow mixed printed board assembly production system, A carriage 10 for seating a carrier; A timing belt (14) provided at both sides of the inner surface of the carriage to move the carrier back and forth into the carriage (10); A drive motor 20 mounted to the carriage 10 to rotate the timing belt 14; A limit switch 30 installed at one end position of the carriage 10 to check whether the carrier is in the correct position; Transfer means installed to move the carriage 10; And a guide shaft 50 for guiding the shanghai at the same time of the carriage 10, The transfer means is installed in the bottom plate 120, the cylinder 41 in which the cylinder rod 42 is immersed and extended upright, and the moving arm provided with the sprocket wheel 44 rotatably at the end of the cylinder rod 42 The fixing arm 45 is fixed to the fixing plate 45 to which the sprocket wheel 46 is rotatably installed on the fixing plate 110, and fixes one side of the chain 47 to the carriage 10. By connecting the sprocket wheels 46 and fixing the other side of the chain 47 to the fixing plate 110 through the sprocket wheels (44, 46), the carriage 10 is raised in accordance with the immersion elongation of the cylinder rod 42 And elevators in a multi-stream mixed flow board assembly production system characterized by lowering. The support of claim 1, wherein the cable protection member (70) and the cable protection member (70) surrounding the cable are securely placed to protect the cable connected to the driving motor (20) and the limit switch (30). An elevator in a multi-stream mixed flow print board assembly production system characterized by the addition of (71). The method of claim 1, wherein the bracket 60 for supporting the load generated during the transport of the carrier is further provided in the lower portion of the timing belt 14 provided on the inner surface of the carriage 10 Elevator in mixed-flow board assembly production system. The elevator of claim 1, wherein at least two guide shafts (50) are installed symmetrically. The elevator of claim 1, wherein the drive motor is a stepping motor. The elevator of claim 1, wherein the carriage is made of duralumin.