JP2002233803A - Method and apparatus for applying adhesive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of applying an adhesive, by which the adhesive is stably and precisely applied on a fine part to be bonded without providing a flange to prevent the flow-down of the adhesive or rotating a coating surface. SOLUTION: An adhesive liquid drop 10 is formed on the tip part of a coating nozzle 9 and the adhesive is bought into contact with the side surface of the fine parts 7 and 8 to be bonded and applied by moving relatively a grip device side of the fine parts 7 and 8 to be bonded or the coating nozzle 9 side. The adhesive is precisely applied on the fine part to be bonded at a high speed inexpensively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for applying an adhesive for fixing a plurality of fine parts to be bonded.

[0002]

2. Description of the Related Art FIG. 8 shows a conventional adhesive application method used for bonding and fixing an optical element such as a light emitting element and a light receiving element to a carriage (base) in an optical pickup component used in a DVD device or a CD device. This will be described with reference to FIG. FIG. 8A is a front view of an adhesive applied portion in the first conventional adhesive applying method, and FIG. 8B is a side view thereof. FIG. 9 is a side view of an adhesive applied portion in the second conventional adhesive applying method.

As shown in FIGS. 8 (a) and 8 (b), a first conventional adhesive application method uses an application nozzle 1 for applying an adhesive for fixing an optical element 11 to a carriage 12.
Since the adhesive 13 dropped from the tip of 4 flows down in the direction of gravity, the optical element 11 is provided with a flange portion 11a for preventing the adhesive 13 from flowing down.

In another conventional adhesive application method as shown in FIG. 9, an assembly of an optical element 11 and a carriage 12 indicated by a dotted line is rotated in the vertical direction as indicated by a solid line during the process. The adhesive 13 is applied to the application surface by directing the adhesive application surface to a position perpendicular to the direction in which the adhesive 13 dropped from the tip of the application nozzle 14 flows down.

[0005]

However, DVDs and Cs
D is required to be light, thin and short as a product. Therefore, the light-emitting element, the light-receiving element, and various lenses, which are the components of the optical pickup used in the optical pickup, are fine and lightweight parts. When actually assembling as an optical pickup, the light emitting element and the light receiving element are adjusted with reference to the optical path of the carriage, a fixing position is determined, and an adhesive is applied and fixed. When the adhesive is applied to the side surface of the light receiving element after adjusting the light receiving element with respect to the carriage as in the first adhesive applying method, the adhesive flows down in the direction of gravity, so that at least the carriage side or the light receiving element side It was necessary to provide a flange for preventing the adhesive from flowing down. However, when this flange is provided, there has been a problem that the optical pickup cannot be sufficiently reduced in size and size.

In the case where the adhesive is applied by directing the adhesive applied surface fixing the carriage and the light receiving element to a position perpendicular to the direction in which the adhesive flows down as in the second adhesive applying method, It is necessary to rotate the carriage and the light receiving element by 90 degrees when assembling the optical pickup, and such a rotation mechanism makes the coating equipment expensive, and furthermore, the rotation operation increases the tact time (increases time) in the coating time and lowers the production efficiency. There was a problem of letting it.

An object of the present invention is to provide an adhesive which does not increase the size of a fine part to be bonded by providing a flange, rotate an assembly to increase the cost of coating equipment, or to reduce the time required for coating. An object of the present invention is to provide a coating method and an apparatus therefor.

[0008]

In order to solve this problem, the method for applying an adhesive according to the present invention comprises a step of holding a plurality of fine parts to be bonded in a positional relationship for fixing the parts to each other; Arranging the tip of the adhesive application nozzle near the bonding position of the micropart to be bonded, wherein the adhesive has a drop shape (hereinafter referred to as a drop shape) at the tip of the application nozzle by selecting the relationship between its own weight, surface tension and viscosity. The step of forming a droplet of the adhesive), and relatively moving the bonding target fine part and the application nozzle by a fine dimension, and bringing the droplet-shaped droplet into contact with a side surface of the bonding fine part. Coating step. According to the adhesive application method of this configuration, the droplet of the adhesive is formed in a droplet shape so that it does not flow down from the tip of the application nozzle, and the droplet is applied by being brought into contact with the fixed part of the micropart to be bonded. can do. As a result, the adhesive application can be performed accurately, at high speed, and at low cost without providing a flange on the adhered fine component and enlarging it or rotating the assembly.

An adhesive applying apparatus according to the present invention is an apparatus for holding a plurality of micro parts to be bonded in a positional relationship for fixing each other,
An adhesive application nozzle disposed in the vicinity of the bonding position of the two held bonded microparts, an adhesive supply device that forms a droplet of the adhesive in the form of a droplet at the tip of the application nozzle, and the droplet shape. A coating device is provided for applying a droplet of the adhesive to the side surfaces of the plurality of bonded microparts so as to move the microdroplets relative to each other by minute dimensions and apply the liquid. According to the adhesive coating apparatus having this configuration, the droplets of the adhesive are formed in the shape of a drop so that they do not flow down from the tip of the coating nozzle, and the droplet is brought into contact with the fixed portion of the micropart to be bonded to be coated. can do. As a result, it is possible to provide an adhesive applying apparatus that can perform adhesive applying accurately, at high speed, and at low cost without providing a flange on the adhered fine parts and enlarging the parts or rotating the assembly.

In the adhesive applying apparatus having the above-described structure, the applying means relatively moves and adjusts the gripping device or the applying nozzle for the fine parts to be adhered to apply the droplets of the adhesive in the form of droplets. It is preferable that the application is performed by contacting the side surface of the fixed position of the bonded micropart. The coating means,
It is more preferable that the droplets of the droplet-shaped adhesive are blown with a gas so that the droplets are brought into contact with the side surface at the fixing position of the micropart to be bonded. Further, it is preferable to provide a temperature controller for adjusting the temperature of the adhesive in the adhesive supply device so that the adhesive has a viscosity of forming droplets in a droplet shape.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the method and apparatus for applying an adhesive according to the present invention will be described below with reference to the accompanying drawings. In the following embodiments, an example in which an optical element and a carriage in an optical pickup are bonded to each other will be described. In the following description, a vertically long droplet-shaped droplet is called a lantern-shaped adhesive droplet because it resembles a vertically long lantern.

Embodiment 1 FIGS. 1 to 4 are enlarged views of an adhesive application portion in an adhesive application method according to Embodiment 1 of the present invention. 1A is a front view when the application nozzle is at an initial position, and FIG. 1B is a side view thereof. FIG. 1C is a front view when the application nozzle is lowered, and FIG. 1D is a side view at that time. FIG. 2A is a front view when a lantern-shaped adhesive droplet 10 is formed at the tip of the application nozzle,
(B) is a side view at that time, and (c) is a plan view at that time. FIG. 3A is a front view when a lantern-shaped adhesive droplet is brought into contact with an optical element and a carriage, and FIG.
Is a side view at that time, and (c) is a plan view at that time. FIG. 4 (a) shows the nozzle 10 when the application of the adhesive is completed.
Is a front view when returning upward, (b) is a side view at that time, and (c) is a plan view at that time.

In the adhesive application method according to the first embodiment, as shown in FIGS. 1A and 1B, the application nozzle 9 is located at an initial position away from the assembly of the carriage 7 and the optical element 8. It is provided in. Then, the application nozzle 9 descends to the position shown in (c) and (d) of FIG. At this lowered position, as shown in FIGS. 2A to 2C, an amount of adhesive that does not drop by its own weight is extruded from the application nozzle 9, and this adhesive is used as a lantern-shaped adhesive. A droplet 10 is formed. The amount of the adhesive to be extruded is determined by the diameter of the nozzle and the viscosity of the adhesive so as to be slightly larger than the outer shape of the nozzle but not to fall down. In this state, as shown in FIGS. 3A to 3C, the assembly of the carriage 7 and the optical element 8 is minutely moved and brought into contact with the lantern-shaped adhesive droplet 10. Then, as shown in FIGS. 4A to 4C, a lantern-shaped adhesive droplet 10 is formed in a 90 ° concave portion between both walls of the fixed portion of the carriage 7 and the light receiving element 8. It flows and the application of the adhesive is completed. Thereafter, the adhesive nozzle 9 rises and returns to the initial position.

According to the adhesive application method of the first embodiment, since the lantern-shaped adhesive droplet does not flow down by its own weight, a flange for preventing the flow-down is provided on the optical element 8 or the carriage 7 and the optical element There is no need to rotate the assembly with 8. As a result, the optical pickup can be made lighter, thinner and shorter, and the tact time of the adhesive application time can be shortened.

Embodiment 2 FIG. 5 is a front view showing the configuration of an adhesive application device according to Embodiment 2 of the present invention, and FIG. 6 is a side view thereof. Since the adhesive application apparatus of the second embodiment executes the adhesive application method of the first embodiment, the same parts as those of the first embodiment are denoted by the same reference numerals.

In FIGS. 5 and 6, the carriage 7 held by the jig plate 6 and the optical element 8 held by the chuck 6 are assembled at a predetermined fixed position. FIG.
Moving stage 1 moving in the direction of arrow Y, arrow X in FIG.
The carriage 7 and the optical element 8 are positioned by the moving stage 2 moving in the direction, the moving stage 3 moving in the direction of the arrow X, and the moving stage 4 moving in the direction of the arrow Z, and in that state, in the X, Y, and Z directions. Go to The adhesive is applied to a droplet 10 formed in a lantern shape from the tip of the application nozzle 9.
Supplied as

In the adhesive application apparatus of the second embodiment, as a basic operation, the moving stage 1, the moving stage 3, the moving stage 4, the jig plate 5, the chuck 6, the carriage 7, and the optical element 8 are moved by the moving stage 1. Move at the same time. The moving stage 2 moves the moving stage 3, the moving stage 4, the jig plate 5, the chuck 6, the carriage 7, and the optical element 8 at the same time. The moving stage 4, the chuck 6, and the optical element 8 are simultaneously moved by the moving stage 3. The chuck 6 and the optical element 8 are simultaneously moved by the moving stage 4.

The operation of the thus configured adhesive applying apparatus of the second embodiment will be described. First, as shown in FIG. 6, the carriage 7 is attached to the jig plate 5, and the optical element 8 is held by the chuck 6. Carriage 7 at this time
Is temporarily attached on the basis of the external dimensions (the external center of the carriage coincides with the external center of the optical element). In this state, the optical path of the carriage 7 does not always coincide with the optical path of the laser module in the optical element 8 on an optical basis. The reason is that the mounting position of the laser module in the optical element 8 varies.
Further, as shown in FIGS. 1A and 1B of the first embodiment, the application nozzle 9 is adjusted and attached so that the carriage 7 and the optical element 8 in the temporarily attached state can be fixed.

Next, in order to adjust the fixed position of the carriage 7 and the optical element 8 on an optical basis, the carriage 7 and the optical element 8 are moved by the moving stage 1 and the moving stage 2 to the adjustment position of the assembly equipment. In this position, the optical element 8 is moved by the moving stage 3 and the moving stage 4,
The optical element 8 is positioned with respect to the carriage 7 not on the basis of the external dimensions but on the optical basis. After the adjustment based on the optical standard, the carriage 7 and the optical element 8 are moved by the moving stage 1 and the moving stage 2 to a fixed position of the assembly facility for fixing. At this time, by moving the moving stage 2 in the opposite direction by the moving amount of the moving stage 3 moved when the optical element 8 is adjusted, the coating nozzle 9 is always stably and accurately attached to the carriage 7 and the optical element 8. On the other hand, it can move downward. ((C) of FIG. 1,
(D)).

Further, as shown in FIGS. 2A, 2B and 2C, a lantern-shaped adhesive droplet 10 is formed at the tip of the application nozzle 9 for applying the adhesive. At this time, an application nozzle 9 is attached to an adhesive supply device (not shown).
Is provided with a temperature controller for adjusting the viscosity of the adhesive so that a lantern-shaped adhesive droplet 10 is formed at the tip of the adhesive.
Then, the moving stage 1 is moved in the direction of the application nozzle 9, and as shown in FIGS. 3A, 3 B and 3 C, a lantern-shaped adhesive droplet 10 is applied to the optical element 8 and the carriage 7.
And apply it in contact with the fixed part.

The adhesive applying apparatus of the above embodiment has been described with an example in which the carriage 7 and the optical element 8 adjusted on an optical basis are moved by the moving stage. Conversely, the moving stage is stopped and the application nozzle 9 is moved left and right. May be moved.

Embodiment 3 FIG. 7 is a side view of an adhesive applied portion in an adhesive applying method according to Embodiment 3 of the present invention. The adhesive application method of the third embodiment is different from that of the first embodiment only in the method of bringing the lantern-shaped adhesive droplet into contact with the applied portion. Therefore, the same portions as those in the first embodiment are denoted by the same reference numerals, and duplicate description will be omitted. FIG.
In the embodiment of the present invention, air is blown from the spray nozzle 11 to fix the lantern-shaped adhesive droplet 10 formed at the tip of the application nozzle 9 between the vertical walls of the carriage 7 and the optical element 8. Contact the parts efficiently and securely.

According to the adhesive applying method of the third embodiment,
By blowing air from the air supply nozzle 11 onto the lantern-shaped adhesive droplet 10, the adhesive can be stably and reliably brought into contact with the side of the optical element 8, so that the adhesive can be applied accurately and easily. it can.

[0024]

As described above in detail in the embodiments,
ADVANTAGE OF THE INVENTION According to the adhesive coating method and its apparatus of this invention, the droplet of the lantern-shaped adhesive formed at the tip of the coating nozzle is applied to the gripping device side of the micropart to be bonded or the coating nozzle side of the adhesive supply device. The adhesive can be applied by contacting the side of the micropart to be bonded. As a result, it is possible to apply the adhesive accurately, at high speed, and at low cost without providing a flange for preventing the adhesive from flowing down on the fine component or rotating the application surface. In addition, by blowing air on the lantern-shaped adhesive droplets,
Adhesive application can be performed accurately and easily.

[Brief description of the drawings]

FIG. 1A is a front view when an application nozzle is at an initial position in an adhesive application method according to a first embodiment of the present invention. FIG. 1B is a side view thereof. FIG. 1C is a front view when the application nozzle is lowered. (D) is the side view

FIG. 2 (a) is a front view when a lantern-shaped adhesive droplet is formed at the tip of an application nozzle, FIG. 2 (b) is a side view, and FIG.

FIG. 3A is a front view when a lantern-shaped adhesive droplet is brought into contact with an optical element and a carriage, FIG. 3B is a side view thereof, and FIG.

4A is a front view when the application of the adhesive is completed, FIG. 4B is a side view thereof, and FIG.

FIG. 5 is a front view illustrating a configuration of an adhesive application device according to a second embodiment of the present invention.

FIG. 6 is a side view illustrating a configuration of an adhesive application device according to a second embodiment of the present invention.

FIG. 7 is a side view of an applied portion in an adhesive applying method according to a third embodiment of the present invention.

FIG. 8A is a front view of an application portion in a first conventional adhesive application method. FIG. 8B is a side view of an application portion in a first conventional adhesive application method.

FIG. 9 is a side view of an application portion in a second conventional adhesive application method.

[Explanation of symbols]

 Reference Signs List 1 moving stage moving in arrow Y direction 2 moving stage moving in arrow X direction 3 moving stage moving in arrow X direction 4 moving stage moving in arrow Z direction 5 plate 6 chuck 7 carriage 8 optical element 9 coating nozzle 10 lantern Drops of adhesive in shape 11 Spray nozzle

Continued on the front page F term (reference) 4D075 AC07 AC60 AC73 AC88 AC93 CA12 CA47 DA11 DA34 DC24 EA35 4F041 AA05 AB01 BA47 CA02 CA18 4F042 AA06 AB01 BA08 BA19 CA08 5D119 AA38 BA01 BB01 BB04 JA00 JC03 NA05

Claims (5)

[Claims] 1. A step of holding a plurality of fine parts to be bonded in a positional relationship for fixing each other, and a step of disposing a tip of an adhesive application nozzle near a bonding position of both of the fine parts to be bonded held. Forming a droplet of an adhesive in the form of a drop (hereinafter, referred to as a drop shape) at the tip of the application nozzle by selecting the relationship between the self-weight, surface tension, and viscosity; An adhesive applying method, comprising a step of relatively moving a coating nozzle by a very small dimension, and applying the droplet in contact with a side surface of the micropart to be bonded. 2. An apparatus for holding a plurality of micro parts to be bonded in a positional relationship for fixing them to each other, a nozzle for applying an adhesive disposed near a bonding position of both of the micro parts to be bonded, An adhesive supply device for forming a droplet of the adhesive in the form of a droplet at the tip, and a small dimension movement by bringing the droplet of the droplet of the adhesive into contact with the side surfaces of the plurality of bonded fine parts. And a device for applying the adhesive. 3. The application unit relatively moves and adjusts the gripping device or the application nozzle of the bonded fine component to drop the droplet-shaped adhesive droplet at a fixed position of the bonded fine component. 3. The adhesive applying device according to claim 2, wherein the adhesive is applied while being brought into contact with the side surface. 4. The bonding according to claim 2, wherein the application unit contacts the side surface of the fixed position of the micropart to be bonded by spraying a gas onto the droplet of the droplet-shaped adhesive. Agent application device. 5. The adhesive supply device according to claim 2, wherein a temperature controller for adjusting the temperature of the adhesive so that the adhesive has a viscosity that forms droplets is provided. Or the adhesive application device according to 4.