JP5026151B2 - Adhesive applicator - Google Patents

Abstract

The invention provides a bonding agent coating device capable of coating at a high speed. A bonding agent coating device includes a coating component (10) capable of being supported in a manner of moving up and down and being pre-tensioned downwards; the bonding agent coating device is provided with: an engagement guide rail (14) which is formed on the coating component and includes a transverse guide section; a rotary arm (18) which includes a first end (18A) engaged with the transverse guide section of the engagement guide rail and a second end (18B) at a position opposite to the first end, and which can rotate up and down based on a rotary arm (16) located between the two ends as a pivot; and an ascending/descending drive unit (10) which presses the second end (18B) while descending such that the second end ceases at random height and releases the pressing at a specified height while ascending.

Description

  The present invention relates to an adhesive application device, and more particularly to an adhesive application device suitable for application when an adhesive is efficiently applied on a substrate.

  Conventionally, when electronic components are mounted (mounted) on a printed circuit board, the electronic components are temporarily fixed on the substrate with an adhesive, and for this reason, they are bonded to the component mounting line that produces the mounted substrate. An agent application device is prepared.

  As such an adhesive application device, for example, in Patent Document 1, a syringe filled with an adhesive can be moved up and down by a link mechanism connected to a cam follower driven by the rotation of an eccentric cam. An apparatus is disclosed in which an adhesive discharged from a nozzle at the lower end is applied onto a substrate during movement.

JP-A-11-197588

  However, in the adhesive application device disclosed in Patent Document 1, the application portion including the nozzle and the syringe is raised and lowered by a cam link that rotates the eccentric cam and follows the rotation of the cam. Since the adhesive is applied by this method, the application part is raised to a certain height for each application operation, which causes a problem of time loss and cannot increase the speed of the application operation. It was.

  The present invention has been made to solve the above-described conventional problems, and an object thereof is to provide an adhesive coating apparatus capable of performing a coating operation at high speed.

  The present invention relates to an adhesive application device having an application part supported so as to be vertically movable and biased downward, and an engagement guide having a lateral guide part formed in the application part, It has a first end engaged with the lateral guide portion of the engagement guide, and a second end opposite to the first end, and is turned up and down with a pivot shaft positioned between the both ends as a fulcrum. A rotation arm that can rotate, and a lowering drive unit that depresses the second end when lowered and stops at an arbitrary height, and releases the depression at a predetermined height when raised. It solves the problem.

  In the present invention, the elevating drive means includes a contact portion having a contact surface at the lower end, a ball screw fixed to the upper end of the contact portion and extending upward, and a motor that rotates the ball screw. May be included.

  According to the present invention, the application portion supported by the first end portion on the opposite side via the engagement guide is depressed by pushing down the second end portion of the rotating arm by the lifting drive means and stopping it at an arbitrary height. Similarly, since it can be stopped at an arbitrary height, the coating portion is stopped at a position close to the substrate, and the second end portion is pushed down and released while maintaining the state of the rotating arm at that time. By performing the operation, it is possible to perform the coating operation performed by lowering the raised coating portion on the substrate within the minimum movement range.

  Therefore, it is possible to perform the coating operation at a higher speed than the conventional adhesive coating apparatus in which the coating part must always be raised to a certain height.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In FIG. 1, the principal part of the coating head with which the adhesive agent coating apparatus of one Embodiment which concerns on this invention is provided is shown typically.

  Although the illustration of the coating head itself is omitted, the coating head can be moved in the XY directions by an XY driving means (not shown).

  In this coating head, a coating unit 10 including a syringe filled with an adhesive is supported so as to be movable up and down, and is biased downward by its own weight. The application unit 10 is provided with a pressure adjusting device 12 and pressurizes the inside of the syringe while the application unit 10 is lowered onto the substrate S below, thereby allowing the adhesive to be discharged from the lower end of the application unit 10. It can be done.

  Further, a linear guide (engagement guide) 14 having a groove portion (guide portion) extending in the horizontal direction in the figure is fixed to the application portion 10.

  Further, the coating head is provided with a turning arm 18 which can turn (swing) in the vertical direction about the turning shaft 16 in a lateral direction. The rotating arm 18 includes a first bearing (first end) 18A that engages (contacts) with the upper and lower guide surfaces constituting the groove portion of the linear guide 14, and the first bearing across the rotating shaft 16. It has the 2nd bearing (2nd edge part) 18B of the position facing 18A. These bearings reduce friction during contact (contact).

  Further, the application head is provided with a raising / lowering drive means 20 that depresses the second bearing 18B when lowered and stops it at an arbitrary height and releases the depression at a predetermined height when raised.

  The elevating drive means 20 includes a hammer (contact portion) 22 having a contact surface with the second bearing 18B at the lower end, a ball screw 24 fixed to the upper end of the hammer 22 and extending upward, A motor 26 that rotates the ball screw 24 and is fixed to the coating head.

  In the present embodiment, the motor 26 is rotated, the hammer 22 attached to the ball screw 24 is lowered and brought into contact with the second bearing 18B, thereby generating a force for pushing down the second bearing 18B. The rotating arm 18 is rotated clockwise. With this rotation, the first bearing 18A on the left side in the drawing applies an upward force to the engaged linear guide 14, and is attached to the first bearing 18A via the linear guide 14. The applied portion 10 can be raised as shown in FIG.

  On the other hand, when the motor 26 is rotated in the reverse direction and the hammer 22 is raised, the application unit 10 falls by its own weight, and a force is applied downward to the first bearing 18A, so the second bearing 18B moves upward. As a result, the rotating arm 18 rotates counterclockwise, and when the push-down by the hammer 22 with respect to the second bearing 18B is released at a predetermined height, the application unit 10 is lowered as shown in FIG. To do.

  Here, the operation when lowering the application unit 10 will be described. When the ball screw 24 is moved to stop and fix the hammer 22 at an arbitrary height, the second bearing of the rotating arm 18 that rotates counterclockwise is provided. As shown in FIG. 4, the hammer 22 in contact with 18 </ b> B suppresses the operation of the second bearing 18 </ b> B to its height, so that the application unit 10 does not fall by its own weight to the lowest point (application height). It is possible to maintain the lowered position at a certain height.

  When the hammer 22 is raised while the coating unit 10 is maintained at a constant height close to the substrate S as shown in FIG. 4, the push-down to the second bearing 18B is released by merely raising the hammer 22. Since it can drop by its own weight until the lowered position reaches the lowest point, an adhesive can be applied onto the substrate S.

  In this way, by rotating the ball screw 24 so that the hammer 22 can be stopped and fixed at an arbitrary height, it is possible to perform the coating operation while suppressing the vertical movement of the coating unit 10 to the minimum movement range. It becomes. Therefore, according to the present embodiment, it is possible to greatly improve the adhesive application efficiency.

  In the above-described embodiment, the case where one application unit 10 is operated by one elevating means 20 has been described. However, as shown in FIG. 5 and when the application unit 10 is raised, FIG. May be moved up and down by a similar mechanism.

  In the embodiment, the application unit 10 is biased downward by its own weight. However, a biasing means such as a spring may be provided separately.

The schematic diagram which shows the outline | summary of the application part with which the adhesive agent coating apparatus of one Embodiment which concerns on this invention is equipped, and its operation mechanism Schematic diagram corresponding to FIG. 1 showing the state of the application part rising. Schematic diagram corresponding to FIG. 1, showing a state when the application part is lowered Schematic diagram corresponding to FIG. 1 showing a state where the height of the application part is maintained Explanatory drawing which shows the modification of the adhesive agent coating apparatus which concerns on this invention Other explanatory drawing which shows the modification of the adhesive agent coating apparatus which concerns on this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Application | coating part 12 ... Pressure adjusting device 14 ... Linear guide 16 ... Rotating shaft 18 ... Rotating arm 18A ... 1st bearing (1st edge part)
18B ... Second bearing (second end)
DESCRIPTION OF SYMBOLS 20 ... Lifting drive device 22 ... Hammer 24 ... Ball screw 26 ... Motor

Claims (2)

In an adhesive application device provided with an application part that is supported so as to be movable up and down and biased downward,
An engagement guide having a lateral guide portion formed in the application portion;
It has a first end engaged with the lateral guide portion of the engagement guide, and a second end opposite to the first end, and a vertical axis located between the both ends serves as a fulcrum. A pivot arm that is pivotable to
An adhesive applicator, comprising: an elevating drive unit that pushes down the second end portion when lowered and stops at an arbitrary height and releases the push-down at a predetermined height when raised.   The elevating drive means includes a contact portion having a contact surface at the lower end, a ball screw fixed to the upper end of the contact portion and extending upward, and a motor for rotating the ball screw. The adhesive application device according to claim 1.

Images