JP4412581B2 - Oval constant speed moving mechanism and adhesive application device - Google Patents

Description

  The present invention relates to an oval constant velocity moving mechanism and an adhesive application device using the same.

  In an assembly process for an oval electronic component or the like, an adhesive may be applied to the oval path in order to bond the oval elastic plate or the like to the oval casing. At this time, when the adhesive dispenser moves through the oval-shaped adhesive application path of the non-adhesive material at a relatively constant speed, it becomes possible to equalize the application amount of the adhesive and to perform good adhesion. be able to.

  In order to realize such a constant speed moving mechanism of the oval path, it is preferable to use the XYθ table under numerical control. Although the present inventor does not know a direct conventional example related to this adhesive application device, for example, when the XYθ stage disclosed in Patent Document 1 and the adhesive application device disclosed in Patent Document 2 are combined, an oval shape is obtained. An adhesive application device for bonding an elastic plate or the like to an oval casing is obtained.

JP 2001-318180 A JP-A-11-005055

  However, in an adhesive application device having a constant speed moving mechanism of an oval path using a numerically controlled XYθ table, the XYθ table is large and the entire numerical value of the adhesive application device is low. It is not easy to get in. Further, in order to obtain a numerical control program for optimally operating the XYθ table, a certain trial operation process is required.

  Therefore, an object of the present invention is to provide an oval constant speed moving mechanism and an adhesive coating apparatus using the same, which can simplify the whole apparatus and can be easily combined for various purposes.

The oval constant velocity moving mechanism of the present invention includes an oval cam having an oval periphery composed of a linear portion and an arc portion, a guide that supports the oval cam by allowing the oval cam to move in the major axis direction, A rotating shaft portion having a rotating shaft that coincides with the central axis of the arc portion, and a guide rotating shaft portion that rotatably supports the guide, and the amount of movement of the oval cam on the guide is set to the length of the linear portion of the oval cam. And a roller that rotates and drives at a constant speed in contact with the outer periphery of the oval cam , and at the boundary between the linear portion and the arc portion, The movement in the major axis direction is limited, and the guide rotary shaft portion and the oval cam rotate around the central axis of the arc portion. Wherein when, by the oval cam and a portion in contact with the roller reaches the boundary to said linear portion from the circular arc portion repeats a linear motion to move to the axial direction, the Rukoto give oval constant velocity motion And

  In addition, the adhesive application device of the present invention has an oval constant velocity moving mechanism, a work holding stage is fixed to the oval cam, and a work moving stage to which a driving motor is connected to the roller. An adhesive dispenser is provided.

  According to the present invention, it is possible to provide an oval constant-velocity moving mechanism that is inexpensive and easy to change the profile of the oval path and an adhesive application device using the same.

  1A and 1B are diagrams showing an oval constant velocity moving mechanism according to the present invention. FIG. 1A is a plan view, FIG. 1B is a front view, and FIG. 1C is a side view. In the figure, 11 is an oval cam, 12 is a guide for supporting the oval cam in the long axis direction, 13 is a guide for supporting the oval cam, 13 is a guide rotating shaft portion, 14 is a stopper, and 15 is a roller.

  The oval cam 11 used in the present invention has an outer periphery composed of two linear portions and two arc portions, and is supported by the guide 12 so as to be movable in the long axis direction (direction of the outer peripheral linear portion). Because of the stopper 14, the movement of the oval cam 11 in the long axis direction is limited to the range of the outer straight line portion. Further, the guide 12 can rotate around the rotation axis because of the guide rotation shaft portion 13 that rotatably supports the guide 12. At this time, the rotation axis by the guide rotation shaft portion 13 coincides with the central axis of the arc portion of the oval cam 11. The roller 15 rotating at a constant speed in contact with the outer periphery of the oval cam 11 moves the outer periphery of the oval cam 11 at a constant speed.

  This situation will be further described with reference to FIG. FIG. 4 is a diagram showing the motion of the oval cam used in the present invention. First, FIG. 4A shows a state in which the oval cam 11 starts to move along the guide direction 41, and the roller 15 is in contact with the straight portion of the oval cam 11 and rotates around the roller rotation shaft 45 in the roller rotation direction. It is rotating at a constant speed in the direction of 55.

  Next, FIG. 4B shows a state before the oval cam 11 finishes moving along the guide direction 41, and the roller 15 is in contact with a portion near the end of the straight portion of the oval cam 11 and rotates. It rotates at a constant speed around the axis. Thereafter, when the contact point between the roller 15 and the oval cam 11 reaches the end of the straight line portion, the stopper 14 in FIG.

  Instead of this linear motion, rotation around the arc central axis 61 occurs as shown in FIG. This rotation is caused by the rotation of the guide 12 (see FIG. 1) around the guide rotation shaft portion 13 (see FIG. 1).

  When this rotational movement proceeds, the state shown in FIG. 4D is reached, and the boundary between the arc portion and the straight portion is reached. At this time, the stopper 14 (see FIG. 1) does not function as a stopper because the moving direction of the oval cam 11 is reversed due to the rotational motion. As a result, the linear motion along the guide direction 41 starts again, but the motion direction at this time is opposite to the motion direction in FIGS. 4 (a) and 4 (b). In this way, one round of movement along the first linear portion, the first arc portion, the second linear portion, and the second arc portion occurs at a constant speed.

  In addition, supplementally, in the state of FIGS. 4A and 4B, the oval cam 11 performs linear motion along the guide direction 41, but does not rotate around the guide rotation shaft portion 13. This is because, when such rotation starts, the oval cam 11 is pressed against the roller 15, and the frictional force caused thereby increases.

  Thus, according to the oval constant velocity moving mechanism of the present invention, the point on the circumference of the oval cam that contacts the roller moves at a constant velocity. Further, the oval portion formed by moving while being fixed to the oval cam and translating the circumference of the oval cam in the direction of the roller rotation axis also moves at a constant speed with respect to the fixed point in the space.

  Next, the adhesive application device of the present invention will be described. First, an oval-shaped adherend is shown in FIG. FIG. 3A is a plan view showing an oval workpiece, and FIG. 3B is a front view thereof. FIG. 3C is a perspective view showing an oval plate.

  The oval plate 37 is fixed to the stepped portion 36 of the workpiece by an adhesive.

  FIG. 2 is a schematic view showing an adhesive application device having the oval constant velocity moving mechanism of the present invention. A work holding base 27 is fixed to the oval cam 11 of the oval constant velocity moving mechanism 20 similar to that described in FIG. 1, and a motor 29 is connected to the roller 15. A dispenser 28 for applying an adhesive is also provided.

  First, the oval adhesive work 26 is set on the work holding base 27, and then the nozzle tip of the dispenser 28 is brought close to the adhesive application portion, the motor 29 is rotated, and the adhesive is continuously applied. As it is, the adhesive work 26 is made to go around, the rotation of the motor 29 and the application of the adhesive of the dispenser 28 are stopped, and the dispenser 28 is released upward. The control of the motor 29 at this time is slightly modified at the start time and the end time, but basically it may be on / off control.

  Further, the injection of the adhesive may be continuous or repeated in a pulsed manner. In any case, complicated control is unnecessary because the nozzle tip can move at a relatively constant speed in the coating path.

  Next, the present invention will be further described with reference to examples. This embodiment is an example of an adhesive application device used when applying an adhesive to an oval path in a manufacturing process of an acoustic device that is used for a mobile phone or the like and generates a ringing tone, mechanical vibration, and sound. It is.

  In the bonding of the present embodiment, the suspension support plate having the shape shown in FIG. 3C is bonded to the casing having the shape shown in FIGS. 3A and 3B. The suspension support plate is provided with several notches to enhance acoustic characteristics, but the outer peripheral portion to be bonded is an oval shape as shown in FIG. The illustration of the notched portion is omitted.

  The adhesive application device of this embodiment is almost the same as the device already shown in FIG. 2, and an elastic member such as a magnetic circuit member and a diaphragm is attached in advance, and the housing is set on the work holding base 27, and the motor 29 By controlling the dispenser 28, the epoxy adhesive was applied to the oval path, and the suspension support plate was bonded and fixed.

  Since the acoustic device as an adhesive workpiece in the present embodiment is about 10 mm × 15 mm × 5 mm in size, if an oval constant velocity moving mechanism having a simple structure as in the present embodiment is used, The moving stage can be made lightweight. As a result, the inertial force can be kept small in the control of the oval constant speed movement, and the complicated control is not required for the control of the motor 29, and the oval constant speed movement is realized by the almost on / off control. I was able to.

  Moreover, the oval constant velocity moving mechanism of the present invention can easily cope with other types of oval shapes simply by changing the oval profile and replacing the oval cam.

The figure which shows the oval constant velocity moving mechanism of this invention. 1A is a plan view, FIG. 1B is a front view, and FIG. 1C is a side view. The schematic diagram which shows the adhesive agent coating apparatus of this invention. The figure which shows an oval-shaped to-be-adhered object. FIG. 3A is a plan view showing an oval workpiece, FIG. 3B is a front view thereof, and FIG. 3C is a perspective view showing an oval plate. The top view which shows the motion of the oval cam in this invention. 4 (a), 4 (b), 4 (c), and 4 (d) are plan views each showing a state in the middle of a round motion.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Oval cam 12 Guide 13 Guide rotation shaft part 14 Stopper 15 Roller 20 Oval constant speed moving mechanism 26 Adhesive work 27 Work holding base 28 Dispenser 29 Motor 36 Step part 37 Oval-shaped board 41 Guide direction 45 Roller rotation shaft 55 Roller rotation direction 61 Arc central axis

Claims (2)

An oval cam having an oval periphery composed of a straight part and an arc part, a guide for supporting the oval cam by allowing the oval cam to move in the major axis direction, and a rotation corresponding to the central axis of the arc part A rotating shaft portion having a shaft and rotatably supporting the guide; a stopper for limiting the amount of movement of the oval cam on the guide to the length of the straight portion of the oval cam; and an outer periphery of the oval cam A roller that rotates and drives at a constant speed in contact with the roller, and at the boundary between the linear part and the arc part, the stopper restricts the movement of the oval cam in the major axis direction by the stopper. In addition, the rotational rotation of the guide rotation shaft and the oval cam about the central axis of the arc portion and the portion in contact with the roller are in front. By the oval cam and an arc portion reaches the boundary of the said straight portion is repeated a linear motion to move to the axial direction, oval constant velocity moving mechanism, characterized in Rukoto give oval constant velocity motion.   A work holding stage is fixed to the oval cam, a work moving stage connected to a driving motor is connected to the roller, and an adhesive dispenser is provided. An adhesive applicator characterized by comprising:

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