JP3113494U - Vacuum workpiece transfer device for plate workpiece - Google Patents

Abstract

An apparatus is provided that conveys a relatively small and light plate-like workpiece such as a printed circuit board by vacuum suction holding with a plurality of suction pads installed on a support frame.
A transfer device that conveys a plate-like workpiece while holding it by vacuum suction with a plurality of suction pads installed on a support frame, includes a magnet on the top of the suction pad, and freely changes the position of the suction pad on the support frame. Make it possible. In addition, the suction pad is fixed between the support frame and the suction pad having the magnet on the upper side through a plate made of a non-magnetic material. When removing this suction pad, the plate made of the non-magnetic material is removed from the support frame. It has a mechanism that removes the suction pad by separating by the separating means. Furthermore, the plate made of a non-magnetic material has a hole that engages with a protrusion provided on the top of an adsorption pad provided with a magnet, and is positioned at a position where the item to be conveyed is most effectively adsorbed by this engagement. A plate made of a non-magnetic material can be exchanged.
[Selection] Figure 2

Description

  The present invention relates to a transport apparatus that transports a relatively small and light plate-shaped workpiece such as a printed circuit board by vacuum suction holding with a plurality of suction pads installed on a support frame.

  A conveyance device that conveys a plate-like workpiece by vacuum suction holding with a plurality of suction pads installed on a support frame is widely used mainly for conveying a metal plate material to be pressed. For example, as disclosed in Patent Document 1, when a flat plate is transported from a stacking place to a conveyor or the like, the vacuum suction transport device is moved to “standby” → “down” → “adsorption” → “up” → “travel” → “ It is generally performed to move in the order of “down” → “release” → “up” → “return” → “standby”.

  Depending on the shape of the plate-like workpiece, there is a step or the like, and a vacuum leak may occur from the suction pad, resulting in a suction failure. For example, in the case of application to the conveyance of a printed circuit board, through holes 12 are provided everywhere in the printed circuit board 11 as shown in FIG. Further, in the case of a hybrid multilayer circuit board having a structure in which hard parts to be mounted with components are connected to each other by a cable part using a flexible circuit board, the step between the component mounting part 13 and the cable part 14 is as shown in FIG. Yes, even when the suction pad 2 is present, the suction is inhibited. For this reason, a mechanism for adjusting the position of the suction pad is required. Moreover, it is often necessary to adjust in millimeters in both the X and Y directions. This is necessary every time the printed circuit board to be reworked is replaced.

  Conventional positioning of the suction pad has been performed, for example, by calibrating an arm-shaped pad mounting bar as in Patent Document 2. 1 and 2 of Patent Document 2 will be described with reference to FIGS. 4 and 5. 4 is a view from above, and FIG. 5 is a view from the side. A scaled support bar 31 is fixed to the support bar 6 hanging from the conveying device, and a scaled mounting bar 32 is fixed in the lateral direction by screws 41. The mounting bar 32 can be moved by loosening the screw 41. Further, a fixing jig 5 extending from the suction pad 2 is fixed to the mounting bar 32 with screws 42. The position of the suction pad 2 in the mounting bar 32 can be changed by loosening the screw 42. Each suction pad is connected to a pressure hose (not shown) and is connected to a suction device (not shown).

  In the conventional apparatus, the position of the suction pad 2 can be adjusted, but the degree of freedom is limited by the geometric arrangement of the mounting bar 32. In addition, the position of the screws 41 and 42 is moved slightly when the screws 41 and 42 are loosened and fixed, and it takes time to readjust for fixing to the desired position. In the case where frequent setup changes are made, there is a drawback that the adjustment is complicated because it is managed on a scale for each item.

  As another mechanism for adjusting the position of the suction pad, Patent Document 3 discloses a means for changing the arrangement of the suction pad. However, since the expansion frame is used, the mechanism can be adjusted only in the direction of expansion and contraction.

In addition, Patent Document 4 proposes a system that uses a pressure switch for each suction pad to detect the degree of vacuum and uses only an effective suction pad. However, it is necessary to prepare many suction pads. It becomes complicated mechanically.
JP 50-152471 A Japanese Utility Model Publication No. 3-122069 JP 2000-117373 A JP 2000-159346 A

  The present invention is a relatively small and light plate material. Specifically, it can be positioned easily so that the suction pad comes to a position that avoids holes and steps in through holes, such as printed circuit boards. A transport means for transporting plate-shaped workpieces by vacuum suction and holding them with a plurality of suction pads installed on the support frame, equipped with a suction pad positioning mechanism that can cope with the frequent changeover of the machine. The purpose is to provide.

  In order to achieve the above object, a transport device for transporting a plate-shaped workpiece of the present invention by vacuum suction holding and transporting it with a plurality of suction pads installed on a support frame includes a magnet on the top of the suction pad, and the support frame has a suction pad. The position of can be freely changed.

  In addition, the suction pad is fixed between a support frame and a suction pad provided with magnets on the top via a plate made of a non-magnetic material. When removing this suction pad, the plate made of a non-magnetic material is removed from the support frame. It is characterized by having a mechanism for separating the suction pads by separating them by the separating means.

  Furthermore, the plate made of a non-magnetic material has a hole that engages with a protrusion provided on the top of an adsorption pad provided with a magnet, and is positioned at a position where the item to be conveyed is most effectively adsorbed by this engagement. The non-magnetic plate can be exchanged.

  With the present invention, it is possible to easily position a plate-shaped workpiece such as a printed circuit board so that the suction pad comes to a position that avoids a hole or step in the through hole, and many types of plate-shaped workpieces are reworked and frequently replaced. Thus, a transporting means for transporting a plate-like workpiece by vacuum suction holding with a plurality of suction pads installed on a support frame, which is equipped with a suction pad positioning mechanism that can cope with the case, is obtained.

  Hereinafter, the present invention will be described based on the illustrated embodiments.

  FIG. 1 is a schematic view of a plate-like workpiece according to the present invention as viewed from above, and is a schematic view as seen from the side. FIG. 3 is an enlarged view of the suction pad.

  A support frame 33 made of a material that can be magnetized, such as iron, is fixed to the support rod 6 that hangs down from the conveying device. Further, a plate 34 made of a non-magnetic material is detachably provided below the support frame 33, and the plate 34 is installed so as to be lowered by means 7 for separating from the support frame 33 such as an air cylinder. Note that the pulling-off means may be a method of pushing down by hand. A magnet 21 is installed on the top of the suction pad 2 and is fixed at an arbitrary position on the support plate 33 with the plate 34 interposed therebetween. With this structure, it is possible to easily position the suction pad 2 at a position that avoids a hole or step in a through hole, such as a printed circuit board. It is easy to change the setup. Reference numeral 8 denotes a pressure-resistant hose connected to the suction pad 2.

  In order to make positioning easier, the magnet installed on the upper part of the suction pad 2 is a cylindrical magnet, and a protrusion 22 is provided at the center. The plate 34 is provided with a hole that fits into a position where the item to be conveyed is most effectively adsorbed. Furthermore, since the position where the most effective suction is different depending on the item to be conveyed, the plate 34 can be replaced depending on the item to be conveyed.

  Further, it is preferable that the protrusion 22 on the upper portion of the suction pad 2 has a hyperbolic cross section as shown in FIG. 3 so that it can be easily fitted and does not become scratched even if it is rubbed with the plate 34. A ball bearing mechanism may be used.

  By such a mechanism, the suction pad 2 can be easily attached and positioned by hand, and when removing the suction pad, it is easily removed by pulling the plate 34 away from the support frame 33 by means 7 as shown in FIG. Can do. Accordingly, the setup can be easily changed even when various types of plate workpieces are reworked and the setup is frequently changed.

  The non-magnetic plate 34 is preferably as thin as possible for holding the suction pad 2 but is not bent as much as possible when being pulled away from the support frame 33 and has a material and thickness that can easily provide a fitting hole. It is preferable. A 2 mm thick plate made of acrylic resin is recommended. Further, it is more preferable if the place to be separated from the support frame 33 by the means 7 is set outside the support frame 33 and the portion is reinforced. As shown in FIGS. 1 and 2, it is recommended that the thickness of the entire outer periphery of the support frame 33 be increased.

  In the case of a printed circuit board, for example, a four-layer board having a work size of 300 × 250 mm has a weight of approximately 80 to 300 g, depending on the material, and requires a magnetic force to keep this weight at a minimum. Further, in order to prevent the support plate 33 from dropping off due to vibration or impact during transportation, it is preferable to fix it with a magnetic force as strong as possible. However, it is possible to cope with suction and repulsion between the suction pads 2 by hand. I want to. For this reason, it is preferable that the attracting force of the cylindrical magnet per suction pad including the weight of the magnet itself is in the range of 40 to 70 N (4.1 to 7.1 kgf). For example, when using a neodymium magnet, the outer diameter Φ19.5 × the inner diameter Φ10 × thickness 5 (2500 gauss) is 44.1 N, and the outer diameter Φ20 × inner diameter Φ12 × thickness 10 (3300 gauss) is 68.8 N. Therefore, a magnet with a size within this range can be used. Using these magnets, the weight per suction pad is about 100 g.

  It is preferable that there are at least four suction pads 2, but it is preferable to install more suction pads 2 depending on the workpiece size and workpiece weight.

The schematic view which looked at the conveying apparatus which carries out vacuum suction holding | maintenance and conveys the plate-shaped workpiece | work concerning this invention with the some suction pad installed in the support frame from the upper surface. Schematic which looked at the conveying apparatus which carries out vacuum suction holding | maintenance with the several suction pad installed in the support frame, and conveys the plate-shaped workpiece | work concerning this invention from the side. Enlarged view of the suction pad according to the present invention The schematic diagram which looked at the conveying apparatus which carries out vacuum suction holding | maintenance and conveys the conventional plate-shaped workpiece | work with the several suction pad installed in the support frame from the upper surface. The schematic diagram which looked at the conveying apparatus which carries out vacuum suction holding | maintenance and conveys the conventional plate-shaped workpiece | work with the several suction pad installed in the support frame from the side surface. Explanatory drawing which shows the malfunction example at the time of conveying a printed circuit board with the conveying apparatus which carries out vacuum suction holding | maintenance with the several suction pad installed in the support frame in the conventional plate-shaped workpiece | work.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11: Printed circuit board 12: Through-hole 13: Component mounting part 14: Cable part 2: Adsorption pad 21: Magnet 22: Protrusion 31: Supporting bar 32: Mounting bar 33: Support frame 34: Plates made of non-magnetic material 41, 42 : Screw 5: Fixing jig 6: Support rod 7: Means for pulling the plate 34 away from the support frame 33 8: Pressure hose

Claims (1)

  In a transport device that transports a plate-shaped workpiece by vacuum suction holding with a plurality of suction pads installed on a support frame, a magnet is provided above the suction pad, and the position of the suction pad can be freely changed on the support frame. The suction pad is fixed via a plate made of a non-magnetic material between the support frame and the suction pad provided with the magnet on the top, and the plate made of the non-magnetic material is removed when the suction pad is removed. It has a mechanism for separating the suction pad by means of separating from the support frame and the plate made of the non-magnetic material has a hole for fitting with a protrusion provided on the top of the suction pad provided with the magnet on the top. The plate-like workpiece is characterized in that it is positioned at the position where the item to be conveyed is most effectively attracted by this fitting, and the plate made of the non-magnetic material is replaceable. Check suction conveying device.

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