JP2009164230A - Substrate transfer apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a substrate transfer apparatus facilitating work of maintenance such as exchange of a timing belt and preventing a printed board from being deteriorated. <P>SOLUTION: The narrow timing belts 18 are stretched between a pair of pulleys 13 and 14 arranged at an end of an upstream side and an end of a downstream side of transfer chutes 11 and 12, respective rollers 15 installed between the pair of pulleys 13 and 14, and pulleys 16 disposed on output axes of driving motors 17 constituted of servo motors and stepping motors, which can be synchronized. The timing belts 18 are stretched between the pair of pulleys 13 and 14 from outside, and between the rollers 15 from inside. Parts positioned below the timing belts 18 are stretched between the pulleys 16 from below. The both driving motors 17 are controlled by a controller and are synchronously driven, the both timing belts 18 are rotated and the printed board P is conveyed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a substrate transport apparatus that transports a printed circuit board by a transport belt stretched around pulleys provided on a pair of transport chutes.

  This type of substrate transfer apparatus is known from, for example, Patent Document 1. Then, as shown in FIG. 3, the general substrate transport apparatus includes a roller provided between a pair of pulleys 1 and 2 provided at an upstream end and a downstream end of each pair of front and rear transport chutes. A flat belt 5 is stretched between the pulley 3 and the pulley 4, and a pulley provided on the output shaft of a single drive motor and a pulley provided on the connecting shaft 6 connecting the pulleys 4 and 4 are connected to each other. A transmission belt is stretched, and the flat belt 5 is rotated through the transmission belt, the connecting shaft 6, the pulleys 1, 2, 4, and the roller 3 by the drive motor to convey the printed circuit board P. . Here, in consideration of maintenance such as replacement of the flat belt 5, the portions located below the flat belts 5 are positioned upward so that both the flat belts 5 can be removed and attached without obstructing the connecting shaft 6. It is necessary to stretch each pulley 4.

  Further, when the electronic component is mounted on the lower surface of the printed circuit board P, it is necessary to shorten the width for placing on the flat belt 5, and when the printed circuit board P is thin (for example, the thickness is 0.3 mm). Extent), it is easy to enter between the lower surface of both conveying chutes 10 and the flat belt 5, and it is necessary to prevent this entry. For this reason, as shown in FIG. 4, the flat belt 5 is formed with thick portions 5A and 5A along the substrate conveying direction at both ends in the width direction, and a thin portion 5B between the thick portions 5A and 5A. A fitting portion 10A formed and projecting from the lower surfaces of both conveying chutes 10 is fitted to the thin portion 5B with a gap from above, so that the thin printed circuit board P and the flat belt 5 So that it does not enter between.

  However, due to manufacturing variations of the conveyance chute 10, the fitting portion 10A on the bottom surface of both conveyance chutes 10 is fitted to the thin wall portion 5B, so the fitting portion 10A sometimes rubs against the thin wall portion 5B, and fluff is generated. It occurs and adheres to the printed circuit board P, deteriorating the quality of the printed circuit board.

Further, when the printed circuit board P is heavy, the flat belt 5 may be idle. For this reason, it can be considered that the timing belt 7 is used instead of the flat belt 5 and the configuration shown in FIGS. That is, a transmission belt 9C is stretched between a pulley 9A provided on the output shaft of a single drive motor 8 and a pulley 9B provided on a connecting shaft 6 that connects the pulleys 4 and 4, and the drive motor 8, the timing belt 7 is rotated through the transmission belt 9 </ b> C, the connecting shaft 6, the pulleys 1, 2, 4, and the roller 3 to convey the printed circuit board P. In this case, since each timing belt 7 has a shape as shown in FIG. 7, in order to prevent the timing belt 7 from being pulled out by being fitted into each pulley 4, a portion positioned below each timing belt 7 is viewed from below. It is necessary to stretch the pulley 4.
JP 2004-31469 A

  However, at the time of maintenance such as replacement of the timing belt 7, the connecting shaft 6 becomes an obstacle, and the maintenance work becomes troublesome.

  Therefore, the present invention provides a substrate transport device that prevents the transport belt from spinning even if the printed circuit board is heavy, facilitates maintenance work such as replacement of the transport belt, and does not deteriorate the quality of the printed circuit board. The purpose is to provide.

  For this reason, according to a first aspect of the present invention, there is provided a substrate transport apparatus for transporting a printed circuit board by a transport belt stretched between pulleys provided on a pair of transport chutes, wherein the transport belt is composed of a timing belt and synchronized separately. Each timing belt is rotated by a drive motor and conveyed.

  The second invention is characterized in that, in the first invention, the timing belt is disposed inside the opposing inner side surfaces of the pair of conveying chutes.

  The third invention is characterized in that the drive motor is constituted by a servo motor or a stepping motor.

  The present invention provides a substrate transport apparatus that prevents a transport belt from idling even if the printed circuit board is heavy, facilitates maintenance work such as replacement of the transport belt, and does not deteriorate the quality of the printed circuit board. can do.

  Embodiments according to the substrate transfer apparatus of the present invention will be described below with reference to the drawings. 1 and 2, reference numerals 11 and 12 denote a pair of front and rear transport chutes, and pulleys 13 and 14 are provided at the upstream end and the downstream end of the transport chutes 11 and 12, respectively.

  The pulleys provided on the output shaft of the drive motor 17 constituted by the pair of pulleys 13 and 14, the rollers 15 provided between the pair of pulleys 13 and 14, and a synchronous servo motor or stepping motor. A timing belt 18 having a narrow shape (for example, a width of about 2 mm) having a shape similar to that of the timing belt 7 shown in FIG. In this case, the timing belt 18 is stretched from the outside to the pair of pulleys 13, 14 and is stretched from the inside to the rollers 15, and further, a portion positioned below the timing belt 18 is pulley 16 from below. To stretch.

  Then, as shown in FIG. 2, the timing belt 18 is disposed at an inner position of the inner surface 19 facing the conveyance chutes 11 and 12, and the timing belt 18 and the printed circuit board P move in the conveyance chutes 11 and 12 direction. However, when the printed circuit board P is placed on the timing belt 18 and transported while being regulated by the inner surface 19, the transport chute is used even if the printed circuit board P is thin (for example, about 0.3 mm thick). Intrusion between the lower surface of 11 and 12 and the timing belt 18 is prevented.

  Then, controlled by a control device (not shown), both drive motors 17 are driven synchronously, and both timing belts 18 are rotated through the pulley 16, the rollers 15, and the pulleys 13, 14, The printed circuit board P is conveyed. And since both the drive motors 17 of the conveyance chutes 11 and 12 drive synchronously and convey the printed circuit board P, the printed circuit board P conveys reliably, without biting the conveyance chutes 11 and 12. be able to.

  In addition, since the timing belt 18 is rotated by the separate drive motor 17 without providing a connecting shaft for connecting the pulleys 16 and 16 provided on the transport chutes 11 and 12, the timing belt 18 can be easily detached and attached. Therefore, the maintenance work becomes easy. Further, even if the printed circuit board P is thin, the printed circuit board P can be prevented from entering between the lower surfaces of the transport chutes 11 and 12 and the timing belt 18, and the timing belt 18 can be prevented from entering the lower surface 11 A of the transport chute 11 and the transport chute. Since it is possible to avoid rubbing against the lower surface of 12 and no fluff is generated, it is possible to prevent the quality of the printed circuit board from being deteriorated due to the fluff adhering to the printed circuit board P.

  Furthermore, the substrate transport device of the present embodiment is applied to an electronic component automatic mounting device that mounts electronic components on a printed circuit board, a coating device (so-called dispenser device) that applies a coating agent such as an adhesive on the printed circuit board, and the like. Is also applicable.

  Although the embodiments of the present invention have been described above, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description. It encompasses alternatives, modifications or variations.

It is a perspective view of a board | substrate conveyance apparatus. It is a vertical side view of one conveyance chute. It is the schematic perspective view of the board | substrate conveyance apparatus of a prior art example. It is a vertical side view of one conveyance chute of the board | substrate conveyance apparatus of a prior art example. It is the schematic perspective view of the substrate conveying apparatus of another prior art example. It is a perspective view of the substrate conveying apparatus of another prior art example. It is a longitudinal cross-sectional view of a timing belt.

Explanation of symbols

11, 12 Substrate conveyance chute 13, 14 Pulley 15 Roller 16 Pulley 17 Drive motor 18 Timing belt 19 Inner side surface P Printed circuit board

Claims (3)

  In a substrate transport apparatus that transports a printed circuit board by a transport belt stretched between pulleys provided on a pair of transport chutes, the transport belt is constituted by a timing belt, and each timing belt is synchronized by a separate drive motor. A substrate transfer apparatus which is rotated and transferred.   The substrate transport apparatus according to claim 1, wherein the timing belt is disposed inside the opposing inner surfaces of the pair of transport chutes.   The substrate transfer apparatus according to claim 1, wherein the drive motor is a servo motor or a stepping motor.