JPH07155659A - Method to apply liquid linearly and apparatus for method thereof - Google Patents

Abstract

PURPOSE:To apply a small amount of a liquid stably and linearly to projected curved faces) e.g. circumferential faces of a cylindrical-s ape article by moving a wire to which the liquid adheres relatively to a projected curved face while bringing the wire into contact with the projected curved face and rotating the projected curved face and transfering the liquid adhering to the wire linearly to the projected curved face. CONSTITUTION:When a part 20 is supplied and inserted into a part holding jig part 2 and rotated at about 90 degree in reverse direction to the arrow (a) on a rotary shaft 10 as a center, the part is brought into contact with the upper face of an elastic body 7A of a receiving stand 7B. At the same time, when arms 4A, 4B immersed in a liquid 33 of a liquid tank 6 are shifted by rotating on a rotary shaft 5A to a horizontal position, a wire 3 to which the liquid 33 adheres is brought into contact with the circumferential face of the part 20 supported by the part holding jig part 2. In that condition, when a slide base 18 moves, the taper part of the part holding jig part 2 rotates on an elastic body 7A due to friction and transfering work of the liquid 33 is completed. As a result, a slight amount of the liquid can be applied linearly and uniformly to the circumferential side of a part 20.

Description

Detailed Description of the Invention

[0001]

[Table of Contents] The present invention will be described in the following order. Industrial Application Conventional Technology (FIGS. 9 and 10) Problem to be Solved by the Invention (FIGS. 9 and 10) Means for Solving the Problem (FIG. 1) Action (FIG. 1) Example (FIG. 1) ~ Fig. 8) Effect of the invention

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for linearly applying a liquid to the surface of an article having a convex curved surface, and in particular, a minute amount of the liquid can be applied linearly on the peripheral side surface of a cylindrical component. It is suitable to be applied to a linear coating method of a liquid to be coated and its apparatus.

[0003]

2. Description of the Related Art Conventionally, as a method of linearly applying a predetermined amount of liquid to the surface of a component having a convex curved surface such as the peripheral side surface of a lens, firstly, as shown in FIG.
The needle tip is brought into contact with the peripheral side surface of the work (component 20) by using, and a predetermined amount of liquid is applied from the needle tip, the component 20 is rotationally moved in synchronization with the applied amount, and the peripheral side surface of the component 20 is applied. A method of linearly applying the liquid 33 on the substrate has been considered.

Secondly, as shown in FIG. 10, a transfer plate P5 made of a disk is fixed to the rotary shaft P4, and the peripheral end portion of the transfer plate P5 is dipped in the liquid 33 stored in the liquid tank 6. , The peripheral edge portion of the transfer plate P5 is brought into contact with the component 20 while passing through the coating amount adjusting plate P3 while rotating the component.
A transfer method in which the liquid 33 is linearly applied to the peripheral side surface of 0 is considered.

[0005]

However, in the method of coating using the dispenser DIS, it is difficult to stably supply a small amount for a long time because the coating amount varies depending on the pressure and time applied to the dispenser DIS. There was a problem.

When applying by the transfer method,
Since the pressure from the transfer plate P5 is applied to the component 20 during transfer, precise coating cannot be guaranteed, and there is a problem that it is difficult to stably supply the liquid 33 in an extremely small amount.

As described above, in the conventional method, there are many restrictions on the linear trace amount application of the liquid on the convex curved surface, and it has been difficult to achieve precise automatic trace amount stable supply.

The present invention has been made in consideration of the above points, and a linear coating method for a liquid capable of linearly and stably coating a small amount of liquid on a convex curved surface such as a peripheral side surface of a cylindrical component. And its device.

[0009]

In order to solve such a problem, in the present invention, in a linear coating method of the liquid 33 on the convex curved surface 20B of the component 20 having the convex curved surface 20B,
After immersing the wire 3 having a predetermined diameter stretched by the pair of arms 4A and 4B in the bath 6 of the liquid 33, the bath 6 of the liquid 33 is formed.
The liquid 3 is removed from the wire 3 by unloading the wire 3 from the
To attach the wire 3 to which the liquid 33 is attached to the convex curved surface 20.
B, and the wire 3 is moved relative to the convex curved surface 20B along with the convex curved surface 20B so that the liquid 33 attached to the wire 3 is convex curved surface 20B.
To be transferred linearly.

Further, in the present invention, in the above-mentioned liquid linear coating method, the wire 3 to which the liquid 33 is attached is applied to the convex curved surface 20B.
And the wire 3 is moved along the convex curved surface 20B along the convex curved surface 20B without sliding so that the liquid 33 attached to the wire 3 is linearly transferred to the convex curved surface 20B.

Further, according to the present invention, in the above linear coating method of the liquid, the wire 3 to which the liquid 33 is attached is applied to the convex curved surface 20B.
The wire 3 is moved relative to the convex curved surface 20B while sliding along the convex curved surface 20B, and the liquid 33 attached to the wire 3 is linearly transferred to the convex curved surface 20B.

Further, in the present invention, in the linear coating method of the liquid, the wire 3 to which the liquid 33 adheres is applied to the convex curved surface 20B.
And the component 20 having the convex curved surface 20B is moved along with the wire 3 so that the liquid 33 attached to the wire 3 is linearly transferred to the convex curved surface 20B.

Further, in the present invention, in the linear coating method of the liquid, the wire 3 to which the liquid 33 adheres is brought into contact with the convex curved surface 20B of the component 20 fixed on the predetermined holding members 51 and 52, and the wire 3 Is moved along the convex curved surface 20B while drawing a predetermined curve, and the liquid 33 attached to the wire 3 is linearly transferred to the convex curved surface 20B.

In the present invention, the component 20 having the convex curved surface 20B is an optical lens and the liquid 33 is an adhesive.

Further, according to the present invention, in the linear coating device 1 of the liquid 33 onto the convex curved surface 20B of the component 20 having the convex curved surface 20B, the wire 3 having a predetermined diameter is attached by the pair of arms 4A and 4B. After the wire 3 is immersed in the bath 6 of the liquid 33, the liquid attaching means 5 for attaching the liquid 33 to the wire 3 by carrying out the wire 3 from the bath 6 of the liquid 33 and the wire 3 to which the liquid 33 is attached The transfer means 7 and 8 which contact the convex curved surface 20B and move the wire 3 along the convex curved surface 20B relatively to linearly transfer the liquid 33 attached to the wire 3 to the convex curved surface 20B.

[0016]

By immersing the wire 3 in the bath 6 of the liquid 33 and causing the liquid 33 to adhere to the wire 3, the surface tension of the wire 3 causes the liquid 33 to uniformly adhere to the wire 3. Accordingly, by bringing the wire 3 into contact with the convex curved surface 20B and moving the wire 3 relatively, a uniform amount of the liquid 3 can be obtained.
3 can be transferred to the convex curved surface 20B.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, reference numeral 1 indicates a liquid linear coating apparatus as a whole, and a pair of arms 17A and 1 is attached to a rotary shaft 10.
7B is rotatably supported.

A slide guide 11 is mounted between the pair of arms 17A and 17B, and a slide base 18 is slidably supported by the slide guide 11. The actuator 12 is attached to the side surface of the arm 17B. The actuator 12 drives the slide base 18, and the stopper 16 attached to the side surface of the arm 17A positions the slide base 18. It is done like this.

A component holding jig portion 2 is rotatably supported at the center of the side surface of the slide base 18. As shown in FIG. 2, the component holding jig portion 2 has the component holding jig portion 2 inserted through a hole penetrating through the side base 18, and the bearing 18A.
And 18B so as to be freely rotatable. Further, the component holding jig portion 2 is formed with a center hole 2C so that the center thereof extends in the axial direction.

A vacuum source (not shown) is connected to the left end of the component holding jig portion 2 via a rotary joint 13 and a vacuum pipe 14.

At the right end of the component holding jig portion 2, the component 2
A positioning hole 2A for positioning and holding 0 is formed so that the supplied component 20 can be positioned and the component 20 can be held by the vacuum inside the positioning hole 2A.

The holding portion 7 for holding the component holding jig portion 2 is
A cradle 7B is mounted on the base 7C so that its position can be adjusted, an elastic body 7A is fixed to the upper end of the cradle 7B, and the taper portion 2B of the component holding jig portion 2 is the elastic body 7A.
It is designed to be pressed against the upper surface. Further, the taper portion 2B is adapted to roll on the elastic body 7A when the slide base 18 forms a circumference.

Here, the base 7C and the pedestal 7B are formed at an angle equal to the taper of the taper portion 2B, and even if the pedestal 7B moves in the axial direction of the component holding jig portion 2, it is tapered with the elastic body 7A. The portion 2B is always in constant contact with each other.

The diameter of the center of the taper portion 2B is made equal to the diameter of the liquid application surface of the component 20, and when it is moved at a constant speed by the slide base 18 or the actuator 12,
In the center of the taper portion 2B, the peripheral speed and the peripheral speed of the component 20 are when the door moves. Since the outer diameter is smaller than the outer diameter of the component 20, the peripheral speed is high. Similarly, when the cradle 7B is moved to the left (in the direction opposite to the arrow f), the peripheral speed is decreased. By changing the position of the cradle 7B in this way,
The peripheral speed of the component 20 with respect to the movement of the slide base 18 can be changed.

FIG. 3 shows the component 20 held by the component holding jig portion 2 and is held by the component holding jig portion 2 with respect to the peripheral side surface (liquid application surface) 20B for applying liquid. The diameter of the peripheral side surface 20A is formed to be small.

Next, in FIG. 1, the liquid supply unit 9 has a rotating shaft 5A in the housing 5C as the arm driving unit 5 and a rotating means for rotating the rotating shaft 5A by a predetermined angle. The rotating shaft 5A can be driven by an actuator 5D attached to the side surface of 5C.

A pair of arms 4 is provided on both sides of the rotating shaft 5A.
A and 4B are supported, and the wire 3 is stretched between the tips of the arms 4A and 4B. Although the material of the wire 3 differs depending on the liquid to be applied, a single solid wire such as Tegus is used.

A liquid tank 6 is arranged below the wire 3, and the liquid 33 to be applied to the component 20 is placed in the liquid tank 6.
Is stored. By rotating the rotating shaft 5A in this state, the arms 4A and 4B swivel and are immersed in the liquid 33 in the liquid tank 6, and then the arms 4A and 4B swivel in the opposite direction and become horizontal. At this time, a certain amount of liquid 33 is attached onto the wire 3.

FIG. 4 shows how the liquid 33 adheres to the wire 3. When the liquid 33 has a low viscosity, when the wire 3 is lifted from the liquid 33, as shown in FIG. The liquid 33, which is spherical due to the tension, is connected in a beaded shape, and the amount of the liquid 33 attached is approximately proportional to the diameter of the wire 3.

On the other hand, as shown in FIG. 4B, when the liquid has a medium viscosity, the adhered state is almost continuous along the wire 3, and the adhered amount of the liquid 33 is approximately the diameter of the wire 3. It is proportional. As described above, the adhesion state of the liquid 33 to the wire 3 differs depending on the viscosity of the liquid 33, but the adhesion to the wire 3 becomes possible by using the liquid 33 having a viscosity of 2000 [cps] or less, for example. .

In this manner, with the liquid 33 attached to the wire 3, the peripheral side surface (coating surface) 20B of the component 20 which is the adherend.
By contacting this with the wire 3 and moving the wire 3 along the peripheral side surface 20B of the component 20 without slipping, the liquid 33 adhering to the wire 3 is transferred to the peripheral side surface (coated surface) of the component 20 as shown in FIG. 20B can be transferred.

In the above configuration, the peripheral side surface 2 of the component 20
The process of applying the liquid 33 to 0B will be described. That is, in FIG. 1, a component 2 is attached by a robot (not shown).
0 is supplied from a component supply device (not shown) and inserted into the component holding jig section 2.

At this time, the component holding jig portion 2 rotates about the rotation shaft 10 and is held at a right angle to the horizontal plane. From this state, the component holding jig portion 2 pivots about the rotation shaft 10 in the opposite direction to the arrow a by about 90 degrees, and the elastic body 7A
Are abutted in a shape.

At the same time, the arms 4A and 4B immersed in the liquid 33 in the liquid tank 6 revolve around the rotation shaft 5A and reach a horizontal position. At this point, the wire 3 having the liquid 33 attached thereto comes into contact with the peripheral side surface 20B of the component 20 held by the component holding jig portion 2.

In this state, when the slide base 18 moves, the taper portion 2B of the component holding jig portion 2 rolls on the elastic body 7A due to friction with the elastic body 7A, and after one rotation, the slide base 18 is rotated. Stopper 1 to stop
Adjust 6. At this stage, the transfer of the liquid 33 is completed.

After this, the arms 17A and 17B are connected to the rotary shaft 1.
It turns in the direction of arrow a around 0 and stops at a position perpendicular to the horizontal plane. After this, the slide base 18 returns to the original position. At this point, the coating cycle is completed. Parts 20
Is transferred to the next assembly process by the robot, and the same coating process is repeated thereafter.

Further, the linear liquid application to the above-mentioned component 20 is automatically performed. For example, in the case of an adhesive of 3 [cps], 1
It is possible to control a coating amount of 1 / 100,000 [cc] or less per [mm]. Further, in this case, the time required for only the transfer is completed in about 1 second.

According to the above structure, the wire 3 is connected to the liquid 33.
The liquid 33 is evenly attached to the wire 3 due to the surface tension of the wire 3. Accordingly, by moving the wire 3 in contact with the convex curved surface (20B), a small amount of the liquid 33 can be linearly and uniformly applied onto the convex curved surface (20B).

By transferring using the wire 3, the liquid 33 can be stably supplied repeatedly for a long time.

Further, the coating amount can be freely set by changing the diameter of the wire 3, and when an extremely fine wire 3 is used, a very small amount of liquid can be coated, which allows precise coating of liquid in a fine component. It can be performed.

Further, by utilizing the elasticity of the wire 3, when the component 20 is brought into contact with the wire 3 and transferred, the liquid 20 is applied with the component 20 without giving an impact to the wire 3 and applying a predetermined pressure. By doing so, damage to the component 20 can be minimized, whereby the positional accuracy of the component 20 held by the jig during liquid application can be maintained.

The liquid 33 can be applied in a short time by moving the component 20 and the wire 3 contacting the component 20 at a relatively high speed, and the production efficiency can be improved. .

As described above, it becomes possible to put the linear coating of the ultra-trace amount liquid onto the convex curved surface into practical use. As an example of the applied liquid, it can be used in various fields such as adhesives, oils and chemicals, and a homogeneous product can be obtained. It is obtained by saving labor.

In the above-mentioned embodiment, the case where the component holding jig portion 2 is independently driven by the component drive mechanism 8 has been described, but the present invention is not limited to this and, for example, as shown in FIG. The component holding jig 51 may be directly attached to the robot head 50 via the holder 54 and moved by the robot in the directions of arrows g and h.

In the above-described embodiment, the component 20 has a cylindrical shape, but the present invention is not limited to this, and even in the case of a component whose part is a curved surface, the liquid is obtained by rolling on the wire 3 according to the coating shape. 33 can be applied linearly.

In the above embodiment, the case where the liquid 33 is linearly applied to the peripheral side surface 20B of the component 20 by moving the component 20 has been described, but the present invention is not limited to this, and the arm is not limited thereto. By moving the wire 3 attached to 4A and 4B, liquid 33
May be applied.

That is, in FIG. 7, the component 20 is fixed and the liquid 3
3 shows a work-fixing-type coating device for coating 3 with a holder 54 attached to the robot head 50, a pair of arms 4A and 4B held by the holder 54, and a wire attached to the arms 4A and 4B. 3, a liquid tank 6, a cleaning unit 53, and a platen 52 on which a component holding jig 51 is mounted.

The wire 3 is tensioned by a pair of arms 4A and 4B attached to a holder 54. The wire 3 can be rotated in the direction of arrow i by a robot (not shown) and can be vertically and horizontally freely moved. It is designed to be mobile.

A liquid 33 is stored in the liquid tank 6 so that the wire 3 can be dipped therein. The cleaning unit 53 is attached to the edge of the liquid tank 6, and the pair of arms 4
A pair of liquid-absorbent cloths are attached to the arms 4A and 4B at a distance substantially equal to the distance between the arms A and 4B to absorb the liquid attached to the arms 4A and 4B.

At least one component holding jig 51 is mounted on the platen 52 and holds the component 20. The platen 52 is conveyed by a conveyor (not shown) and positioned and fixed.

Accordingly, the liquid 3 is produced by the work fixing method.
In the step of linearly applying 3 to the peripheral side surface of the component 20, the wire 3 stretched between the arms 4A and 4B is carried to the liquid tank 6 by the robot, immersed in the liquid 33, and then raised. A predetermined amount of liquid is attached to 3.

The liquid 33 is transferred by the wire 3, but is stopped on the liquid absorbing cloth for a certain period of time so that the cleaning unit 53 removes the excess liquid attached to the arms 4A and 4B. After that, the wire 3 is brought into contact with the peripheral side surface 20B of the component 20 on the component holding jig 51 mounted on the platen 52.

In this state, the liquid 33 is linearly applied to the peripheral side surface 20B of the component 20 by the involute coating method as shown in FIG. That is, FIG. 8 is a view of the component 20 seen from directly above, and FIG. 8A shows a state in which the wire 3 is in contact with the peripheral side surface of the component 20. In this state, the wire 3 stays in contact with the component 20 and does not slip and rotates counterclockwise (arrow i
8B to 8E, the liquid 33 is linearly transferred onto the peripheral side surface of the component 20 by rotating in the direction).

The operation of the wire 3 is realized by controlling the robot so as to draw an approximate curve about the axis. In this way, the liquid 33 can be linearly applied to the peripheral side surface of the component 20 without moving the component 20. Further, the post-application component 20 is transported to the next step while being held by the platen 52.

In FIG. 7, the platen 52 is attached to the component 2
Although the case where 0 is held and conveyed is described, the present invention is not limited to this, and an index table or shuttle system may be used.

Further, in the embodiment described above, the component 20
The case where the wire 3 having the liquid 33 attached thereto is brought into contact with the peripheral side surface 20B and moved along with the peripheral side surface 20B without slipping is described, but the present invention is not limited to this. The wire 3 may be moved along with the peripheral side surface 20B while sliding.

[0058]

As described above, according to the present invention, the wire is used to linearly apply the ultra-trace amount of liquid to the convex curved surface, so that the linear application of the ultra-trace amount of liquid to the convex curved surface is further improved. It can be made uniform.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a liquid linear coating apparatus according to the present invention.

FIG. 2 is a cross-sectional view showing a configuration of a component holding jig portion.

FIG. 3 is a perspective view showing an example of a component which is a liquid application target.

FIG. 4 is a schematic diagram showing a state where a liquid is adhered to a wire.

FIG. 5 is a perspective view showing a state in which a liquid is applied to a component.

FIG. 6 is a perspective view showing a coating device by a work rotation system.

FIG. 7 is a perspective view showing a coating device using a work fixing method.

FIG. 8 is a schematic diagram used to describe an involute coating method.

FIG. 9 is a perspective view for explaining a conventional liquid application method.

FIG. 10 is a perspective view for explaining a conventional liquid application method.

[Explanation of symbols]

1 ... Linear coating device, 2 ... Component holding jig part, 3 ... Wire, 4A, 4B ... Arm, 5 ... Arm drive part, 6
...... Liquid tank, 8 ...... Parts drive, 33 ...... Liquid, 50 ......
Robot head.

Claims (7)

[Claims] 1. A method for linearly applying a liquid onto a convex curved surface of a component having a convex curved surface, wherein a wire of a predetermined diameter stretched by a pair of arms is immersed in a liquid tank, The liquid is attached to the wire by carrying out the wire from the tank, and the wire to which the liquid is attached is brought into contact with the convex curved surface,
A linear coating method for a liquid, characterized in that the wire is relatively moved along the convex curved surface, and the liquid adhering to the wire is linearly transferred to the convex curved surface. 2. A method for linearly applying a liquid comprises contacting the wire to which the liquid adheres with the convex curved surface,
The linear coating of the liquid according to claim 1, wherein the wire is relatively moved along the convex curved surface without sliding and the liquid adhered to the wire is linearly transferred to the convex curved surface. Method. 3. The method for linearly applying a liquid comprises contacting the wire, to which the liquid is attached, with the convex curved surface,
The linear coating of the liquid according to claim 1, wherein the wire is moved relative to the convex curved surface while sliding, and the liquid attached to the wire is linearly transferred to the convex curved surface. Method. 4. The method for linearly applying a liquid comprises contacting the wire to which the liquid adheres with the convex curved surface,
The liquid linear coating method according to claim 1, wherein the component having the convex curved surface is moved along with the wire, and the liquid adhered to the wire is linearly transferred to the convex curved surface. 5. A method of linearly applying a liquid, wherein the wire to which the liquid is adhered is brought into contact with the convex curved surface of the component fixed on a predetermined holding member, and the wire is attached to the convex curved surface. Move while drawing a predetermined curve,
The liquid linear coating method according to claim 1, wherein the liquid adhered to the wire is linearly transferred to the convex curved surface. 6. The liquid linear coating method according to claim 1, wherein the component having the convex curved surface is an optical lens, and the liquid is an adhesive. 7. A device for linearly applying a liquid onto the convex curved surface of a component having a convex curved surface, wherein a wire having a predetermined diameter stretched by a pair of arms and the wire are immersed in a liquid tank. Then, a liquid adhering means for adhering the liquid to the wire by carrying out the wire from the liquid tank, and the wire with the liquid adhering to the convex curved surface,
A linear coating device for a liquid, comprising: a transfer unit configured to move the wire relatively along the convex curved surface and linearly transfer the liquid adhered to the wire to the convex curved surface.