JPH0411967A - Device for coating speaker with adhesive - Google Patents

Abstract

PURPOSE:To rotate a speaker frame at variable speed by freely rotatably arranging a rotating carriage in place of a pedestal and also equipping both a discharge nozzle of an adhesive and the controlling device of the speaker frame. CONSTITUTION:When a start button provided to an input device 61 is pushed, a nozzle 5 in the standby position is laterally moved and positioned on the aperture edge of a speaker frame 7. The nozzle 5 is lowered to the position in which an adhesive is applied and the speaker frame 7 is rotated in this state. When the speaker frame 7 is rotated at 90 deg., the adhesive is discharged from the nozzle 5 without stopping rotation of the speaker frame 7. At a point of time when the speaker frame is rotated at 360 deg., discharge of the adhesive from the nozzle 5 is completed and this nozzle 5 is elevated and one cycle is finished. Thereby coating capacity of the adhesive is remarkably enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for applying an adhesive for bonding a diaphragm to an opening edge of a speaker frame.

(Prior art and its problems) Conventionally, as shown in FIG. 6, adhesive for bonding a diaphragm has been applied to the opening edge of the frame (7) of an elliptical speaker using a computer-controlled adhesive application device. It is.

The device has a main slide table (
12) is loaded with an auxiliary slide table (13) that slides in the Y-axis direction, an adhesive discharge nozzle (5) is provided above the auxiliary table, and control motors (14) and (15) that drive both tables are mounted. It is configured by linking a programmable controller (62).

The elliptical shape of an elliptical speaker is not simple as expressed by the ellipse formula, so as shown in Figure 7, the positions of multiple points assumed on the ellipse are calculated in the X-axis direction and Y-axis direction from the reference position. are input into the programmable controller (62), and the nozzle (5) in a fixed position moves the elliptical opening edge of the elliptical speaker frame (7) set on the auxiliary table (13) at approximately constant speed. As if tracing, the two tables (12) and (13) are simultaneously slid and driven by control signals from the controller (62) to move the speaker frame (7).

The adhesive applicator was able to uniformly apply adhesive to the frame opening edge by inputting numerical values for the elliptical shape of the elliptical speaker frame (7).

However, the Y-axis direction drive device and the speaker mounting jig (16) must be mounted on the auxiliary table (13), which increases the weight. In addition, the main table (12) has an auxiliary table (
13), the weight of the entire two-axis sliding table device increases.When the sliding speed of the table is increased, the table loses synchronization due to the inertial force of the table, causing the opening edge of the speaker frame (7) to close to the nozzle ( 5) Glue cannot be applied correctly because it is out of position.

For example, it has not been possible to slide the table device at high speed to apply adhesive to an elliptical speaker with a major axis of about 150 mm and a minor axis of about 100 mm within 10 seconds.

The present invention achieves dramatically higher efficiency than conventional devices by reciprocating the adhesive discharge nozzle (5) while rotating the speaker frame (7) at variable speeds corresponding to the curvature of the opening edge of the frame. The present invention discloses a device that can apply adhesive approximately evenly to the opening edge of a speaker frame.

(Means for Solving the Problems) The adhesive application device of the present invention relatively moves the speaker frame (7) and the adhesive application nozzle (5) at a constant speed,
A device for applying adhesive to the opening edge of the frame (7) is connected to a rotary drive device (2) and is freely rotatable at a fixed position on the base (1), and is used to attach and detach the speaker frame (7). A rotary table (29) that can be supported and a horizontal reciprocating drive (3)
and an adhesive discharging nozzle (5) with its tip facing downward, which is connected to the elevating drive device M (4) and arranged so as to be able to reciprocate and move up and down orthogonally to the axis of the rotary table (29), and a rotary drive device. (2) is connected to the control motor (30) of the horizontal reciprocating drive (3), and the nozzle (5) moves at a constant speed to the opening edge of the speaker frame (7). ), and a control device (6) that controls the opening edge of the opening to be traced.

(Functions and Effects) A plurality of points are assumed on the ellipse corresponding to the edge of the elliptical opening of the frame (7) of the elliptical speaker, and the positions of the points are measured from a reference point, for example, the center of the ellipse, and the measured values are controlled. Device (6)
Enter.

Position and place the elliptical speaker frame on the rotating table (29).

The control device (6) causes the nozzle (5) to apply the adhesive while tracing the opening edge of the elliptical speaker at a constant speed.

Since the speaker frame (7) is simply rotated and the nozzle (5) is reciprocated, there is no risk of step-out even if the rotation speed of the speaker frame is considerably increased, and compared to conventional equipment, there is no risk of step-out. This dramatically improves adhesive application efficiency.

(Example) As shown in Fig. 1, a rotary table (29) is freely rotatably disposed approximately in the center of the upper surface of the base (1), and a gear transmission means (21) is connected to the rotary shaft (22) of the rigging. and connect the servo motor (20).

The rotating table (29) has a rotating shaft (22) supported on the base (1).
and a disc (23) attached to the upper end of the rotating shaft (22).
), and a speaker mounting base (26) removably attached to the top surface of the disc.
23) and the mounting base (26) are aligned.

The disc (23) has a guide groove (24) running from the outer periphery toward the center.
) is opened, and a contact pin (25) is provided to protrude upward so as to be slidable and positionable in the groove.

A circular recess (27) is formed in the center of the upper surface of the mounting base (26), and a magnet (28) is attached to the bottom surface of the recess.

The base end cylindrical part (71) of the speaker frame (7) is fitted into the recess (27) of the mounting base (26), and the base end cylindrical part (71) of the speaker frame (7) is attracted to the magnet (28). The stay (72) is applied, the speaker frame (7) is removably set on the rotary table (29) by positioning it in the direction of rotation.

The diameter of the base end cylindrical portion (71) of the speaker frame (7) is determined by a standard, and regardless of the opening shape of the frame (7), multiple types of mounting bases (26) are prepared according to the standard. You can leave it there.

Support columns (11) (11) are provided protruding from both sides of the base (1),
The two horizontal guide shafts (31) (31) are straddled over both pillars, and the horizontal threaded shaft (32) is passed parallel to each other between the guide shafts.
The horizontal screw shaft (32) is supported on the column (11).

A servo motor (30) is connected to one end of the horizontal screw shaft (32).

A slide member (33) is disposed so as to be slidable in the guide axis direction, spanning both the horizontal guide shafts (31) (31) and the horizontal screw shaft (32).

A horizontal guide shaft (31) slidably passes through the slide member (33), and a horizontal screw shaft (32) is threaded therethrough.

Brackets (34) (34) are provided protruding forward from the upper and lower ends of the slide member (33), and two vertical guide shafts (41) (41) and a vertical screw shaft (42) are provided between both brackets. are arranged vertically, and the vertical screw shaft (42) is connected to the bracket (3).
4) Bearing it on (34).

A servo motor (40) is disposed on the upper bracket (34) and connected to the vertical screw shaft (42).

An elevating member (43) is disposed astride the vertical guide shaft (41) and the vertical screw shaft (42).

The vertical guide shaft (41) slidably passes through the elevating member (43), and the vertical screw shaft (42) passes through the member and is threaded therethrough.

An adhesive discharge nozzle (5) is attached to the elevating member (43) facing downward.

The adhesive discharge nozzle (5) is equipped with an internal valve (not shown) as is known from Utility Model Application No. 62-59176, and is connected to an adhesive pressure-feeding hose (51) and a pressure air hose for opening and closing the valve. (
52) is connected.

The adhesive supplied into the adhesive nozzle (5) is discharged from the discharge port at the lower end via the valve, and when pressurized air is sent from the pressure air hose (52) to the nozzle (5), the valve closes and the adhesive is discharged. stops.

A solenoid valve (53) for controlling air supply is connected to the pressure air hose (52).

A servo motor (30) (40) connected to the two screw shafts (32) (42), a servo motor (20) for driving the rotary table, and a pressure air hose (52 solenoid valves (5)
3) is connected to a control device (6).

The control device (6) is a known programmable controller (
62), and an input device (61) for numerically inputting the elliptical shape of the elliptical speaker to the controller (62).

The input device (61) assumes a plurality of points on the ellipse of the elliptical speaker frame (7), and inputs the position of each point from the reference position by numerically representing the position.
As shown in the figure, with the center of the ellipse as the reference point P, the ellipse (8) is divided into 72 equal angles, for example, every 5 degrees, and the ellipse (8) and the equal dividing line (
The intersection point (82) of 81) is expressed by two numerical values: a distance from the reference point P and an angle.

In practice, the above task involves drawing the ellipse of an elliptical speaker on paper, plotting the intersection with the equal dividing line in the 1/4 section surrounded by the major axis and minor axis of the ellipse, and then Measure the distance and go.

When the above operation is performed on the 174 curves of the ellipse, the points in adjacent sections become symmetrical, so it is possible to save the effort of performing the above operation on the entire circumference of the ellipse.

As the programmable controller (62), MFC-3400 manufactured by Micron Equipment Co., Ltd. was used.

This can be done by 4-axis high-speed pulse output control or sequence control, but in this embodiment, 3 of the 4-axis control functions are
Use the axis control function to control the two inner axes on the horizontal screw axis (
The servo motor (30) of
used for control.

The control function for the servo motors (30) (20) of the horizontal screw shaft (32) and the rotary table (29), respectively, is called a continuous interpolation function and is known as a continuous interpolation function.
This function allows each point (82) (82) on the ellipse to be traced continuously in a straight line or curved line at a constant speed.

The control function for the vertical screw shaft (42) is provided by the rotary table (29).
Nozzle (5) corresponding to the adhesive application height of the upper speaker.
When the rotating table (29) is rotated by a predetermined angle, the nozzle (5) is raised and returned to the standby position.

Further, in the embodiment, the adhesive applicator is controlled by a programmable controller (62) so as to perform the following operations in sequence.

When the start button provided on the input device (61) is pressed, the nozzle (5) in the standby position moves laterally and is positioned at the opening of the speaker frame.

The nozzle (5) descends to the adhesive application position, and the speaker frame rotates in this state.

When a speaker frame is rotated by 90°, adhesive is discharged from a nozzle (5) without stopping the rotation of the frame.

When the speaker has rotated 360 degrees after the adhesive has been discharged, that is, when the speaker has rotated 450 degrees from the starting state, the discharge of the adhesive from the nozzle (5) ends and the nozzle (5) moves upward. The speaker rotates 90 degrees and returns to its original orientation, completing one cycle.

To start discharging the adhesive while the speaker frame is rotating as described above, the timing of the start of speaker rotation and the start of dispensing the adhesive should match, or the timing of discharging the adhesive should be earlier than the start of rotation of the speaker frame. This is because the amount of adhesive applied at the beginning of adhesive application is larger than at other parts.

Thus, the positions of a plurality of points assumed on the ellipse corresponding to the edge of the elliptical opening of the frame (7) of the elliptical speaker are numerically input into the data input device (61).

The elliptical speaker frame (7) is positioned and placed on the rotary table (29), and the adhesive application device is activated.

As described above, the control device (6) causes the nozzle (5) to apply the adhesive while tracing the opening edge of the elliptical speaker at a constant speed.

When the adhesive has been applied once around the opening edge of the speaker frame (7), the nozzle (5) is raised and the speaker frame is reversed by 90'' to complete one cycle.

The speaker frame on the turntable (29) is replaced with a new speaker frame and the above operation is repeated.

As mentioned above, rotate the speaker frame and insert the nozzle (5
) is simply moved in a straight line, so the movement is natural,
Even if the rotational speed of the speaker is considerably increased, it will not lose synchronization like in the past, and it is possible to apply adhesive to the edge of the frame opening of an elliptical speaker with a major axis of 150 + nm and a minor axis of 100 mm.
This can be done in seconds.

FIG. 4 shows a column (8) erected on a base (1) equipped with a rotary table (29), an arm (81) provided on the column so as to be rotatable in a horizontal plane, and a reciprocating arm (81) mounted on the column. A servo motor (30) for rotation is linked.

A lifting member (43) equipped with an adhesive discharge nozzle (5) is disposed at the tip of the arm in the same manner as described above.

Rotating table (29), arm (81) and lifting member (43)
Each of the servo motors (20), (30), and (40) is linked to the same control device (6) as described above.

The difference between the device in Figure 1 and the device in Figure 4 is that the adhesive application nozzle (5) in the device in Figure 1 moves back and forth in a straight line in a horizontal plane, whereas in the device in Figure 4, the adhesive applicator nozzle (5) moves back and forth in a horizontal plane. The difference is that the application nozzle (5) reciprocates in a horizontal plane along an arcuate trajectory.

The adhesive applicator of the present invention is not limited to elliptical speakers, but can also apply adhesive to the edge of the frame opening of a rectangular speaker as shown in FIG. The rectangle is divided into equal angles, and the point (82) where the rectangle intersects with the equal dividing line is represented by two numerical values: the distance from the center of the rectangle and the angle.

The present invention is not limited to the configuration of the above embodiments, and various modifications are possible within the scope of the claims.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the adhesive applicator, Fig. 2 is a front view showing a part of the same device in cross section, Fig. 3 is a front view of the frame of an elliptical speaker, and Fig. 4 is a diagram of another embodiment. An oblique view of the adhesive applicator; Figure 5 is a front view of the rectangular speaker frame;
FIG. 6 is a perspective view of a conventional adhesive applicator, and FIG. 7 is an explanatory diagram numerically representing the shape of a conventional speaker frame. (20) (30) (40)... Servo motor (22
)... Rotating table (5)... Nozzle (6)
...Control device (61) ...Input device (62
)...Programmable controller brown 2 Dormitory 4 diagram

Claims (1)

[Claims] [1] Speaker frame (7) and adhesive application nozzle (5)
) in a device that applies adhesive to the opening edge of the frame (7) by relatively moving the frame (7) at a constant speed, and in a device that applies adhesive to the opening edge of the frame (7). A rotary table (29) that is freely rotatable and supports the speaker frame (7) in a detachable manner, and a horizontal reciprocating drive device (3).
and an adhesive discharging nozzle (5) with its tip facing downward, which is connected to the elevating drive device (4) so as to be able to reciprocate and move up and down in a plane perpendicular to the axis of the rotary table (29), and a rotary drive. The nozzle (5) is connected to the control motor (20) of the device (2) and the control motor (30) of the horizontal reciprocating drive device (3), and the nozzle (5) moves at a constant speed to the opening edge of the speaker frame (7). An adhesive applicator comprising a control device (6) for controlling the opening edges of (7) to be traced.