JPH11342357A - Sealing material coating applicator and sealing material coating application method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the number of times of nozzle cleaning and to shorten coating application time by controlling the pressure in a cylindrical syringe housing a sealing material and providing the one end of the syringe with a nozzle part for discharging the sealing material and a needle having a recessed part to be fitted to a valve disk coaxially disposed at the syringe. SOLUTION: A proper amt. of the sealing material is supplied from a sealing material supply tank 38 into the syringe 31 and air is supplied from an air source 36 into the syringe 31 to increase the pressure of the sealing material to a set pressure. A glass plate W is moved by an X-Y table 40 and a dispenser mechanism 30 is aligned to a prescribed coating application start position. The sealing material is then discharged from a nozzle tip 32c. The needle 33 is lowered to fit its recessed part and the valve disk at the end point of the coating application, by which the flow of the sealing material is stopped. The sealing material P coagulating in the nozzle hole is removed by a decompressed vacuum chamber. The nozzle cleaning is ended during the movement from the coating application end position to the coating application start position. As a result, the coating application working time may be shortened without the need for nozzle cleaning.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal material applying apparatus and a seal material applying method for applying a high-viscosity seal material to a glass substrate or the like by discharging it with compressed air.

[0002]

2. Description of the Related Art Conventionally, there has been known a sealant applying apparatus for applying a high-viscosity sealant to a glass substrate or the like by discharging the sealant with compressed air. In such a sealing material applying apparatus, the pressure for discharging the sealing material needs to be increased because the viscosity of the sealing material is high. For this reason, the pressure rise time inside the syringe becomes longer, and the response becomes worse,
At the start of application, problems such as delayed application and running out of liquid occur.

For this reason, a dispenser mechanism 10 having a needle valve as shown in FIG. 12 is used.
The dispenser mechanism 10 is formed in a cylindrical shape, and has a syringe 11 for accommodating a sealing material, a nozzle 12 attached to the lower end of the syringe 11 in FIG. And a needle 13 that opens and closes. In FIG. 12, reference numeral 14 denotes a partition wall having a flow path 14a formed in the center. That is,
The needle valve is formed by moving the needle 13 into and out of the flow path 14a. In FIG. 12, 12a indicates a flow path of the nozzle 12, and 12b indicates a nozzle tip.

In such a dispenser mechanism 10, the flow path 14a can be opened and closed by reciprocating the needle 13 in the Z direction in FIG. 12 by an actuator (not shown). For this reason, the discharge of the sealing material ON /
With the pressure in the syringe 11 set to OFF,
It can be ejected. The needle reciprocation is driven instantaneously compared to the flow rate of the sealing material in the flow path 14a at the time of the discharge ON, so that the pressure rise time in the syringe 11 is delayed.
Application delay can be eliminated.

However, the needle 13 is lowered to turn off the application of the sealant.
3 enters the inside of the flow path 14, the sealing material having a volume corresponding to the volume of the tip (see FIG.
Is pushed out to the tip side of.

For this reason, there has been a problem that the sealing material protrudes from the nozzle tip 12b. The protruding sealing material is aggregated at the nozzle tip 12b, and there is a problem that the aggregated sealing material leaves liquid lumps at the application start position of the glass substrate at the next application start position. Note that the glass substrate becomes defective if the liquid lumps remain.

For this reason, in order to prevent liquid lumps from remaining on the glass substrate, nozzle cleaning has been performed in which the sealing material agglomerated on the nozzle tip 12b is wiped during the coating operation. In addition,
In the dispenser mechanism using the needle valve, a valve mechanism (actually disclosed in Japanese Unexamined Utility Model Publication No. Hei 5-26169) which prevents the sealing material from jumping out due to the needle descending is disclosed. There is a problem that maintenance when changing the sealing material is difficult.

On the other hand, as a method of the above-mentioned nozzle cleaning, a method of wiping a nozzle cleaning unit (for example, a brush or the like) by moving the tip of the nozzle up and down and left and right is disclosed in JP-A-6-252541. Solvent penetrates into the water-retaining solvent holding section attached to the cleaning shaft of No. 1, and the two solvent holding sections are arranged so as to be in contact with each other, and the nozzle tip is sandwiched between the two solvent holding sections to clean the nozzle. The method of performing
No. 246210.

[0009]

The sealing material applying apparatus using the above-described nozzle cleaning method has the following problems. That is, the application of the sealing material is usually
In order to draw a pattern for sealing the injected liquid crystal, drawing is performed more than once with one stroke. For example, when a single-stroke pattern is formed on two glass substrates, nozzle cleaning is required once. On the other hand, in order to perform the nozzle cleaning, a place for performing the nozzle cleaning is required separately from the application area. When the application pattern is not a single-stroke writing as described above, movement for performing the cleaning is required several times. For this reason, there has been a problem that the coating operation time increases and the productivity decreases.

Accordingly, an object of the present invention is to provide a sealant applying apparatus and a sealant applying method which can reduce the number of times of nozzle cleaning. It is another object of the present invention to provide a sealing material applying apparatus and a sealing material applying method capable of shortening the application time by efficiently performing nozzle cleaning.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the object, the invention described in claim 1 controls a cylindrical syringe accommodating a sealing material and a pressure in the syringe. A pressure control section, a nozzle section provided at one end of the syringe, for discharging the sealing material, and a liquid-tight partition between the nozzle section and the syringe, and a space between the nozzle section and the syringe. A partition wall provided with a flow path for allowing the sealant to flow therethrough, a valve body provided on the syringe inner side of the partition wall and provided coaxially with the syringe, and coaxially provided in the syringe; And, provided with a needle provided with a concave portion whose front end is provided to be reciprocable in the axial direction thereof and fitted with the valve body, and a drive unit for driving the needle in the axial direction, the valve body includes:
It has an opening only on the side surface along the driving direction of the needle, and this opening is formed so as to communicate with the flow path, and the recess of the needle is fitted when fitted to the valve body. The opening is formed so as to be able to be closed.

According to a second aspect of the present invention, there is provided a syringe accommodating a sealing material, a pressure control unit for controlling a pressure in the syringe, and one end of the syringe.
A nozzle portion for discharging the sealing material, a nozzle cover for covering the tip of the nozzle portion so as to be exposed and housed, and a pressure reducing portion for reducing the pressure inside the nozzle cover are provided.

According to a third aspect of the present invention, in the second aspect of the present invention, the nozzle cover is formed so that the tip of the nozzle can be exposed and housed. According to a fourth aspect of the present invention, there is provided a cylindrical syringe accommodating a sealing material, a pressure control unit for controlling a pressure in the syringe, and one end of the syringe for discharging the sealing material. A nozzle portion, a base attached to the nozzle portion, a nozzle cover attached to the base, coaxially attached to the nozzle and having an opening formed at the bottom thereof, and a nozzle cover attached to the base, The actuator is provided with an actuator for exposing the tip of the nozzle from the opening by moving the nozzle in the axial direction, and a pressure reducing mechanism for reducing the pressure in the nozzle cover.

According to a fifth aspect of the present invention, in the sealing material applying method, the sealing material accommodated in the syringe is applied using a needle provided at one end of the syringe and discharging the sealing material. A step of storing the end of the syringe, which discharges the sealing material a predetermined time before the end of the application of the sealing material to the start of the application of the next sealing material, in a reduced-pressure atmosphere is provided.

According to a sixth aspect of the present invention, there is provided a syringe accommodating a sealing material, a pressure control unit for controlling a pressure in the syringe, and one end of the syringe provided with the sealing material. A nozzle portion for discharging, provided between the syringe and the nozzle portion, comprising a discharge control unit in which a flow path of the sealing material is formed, the discharge control unit,
A first fixed flow passage whose inlet side is connected to the syringe side, a second fixed flow passage whose outlet side is connected to the nozzle portion side, an outlet of the first fixed flow passage, and a second fixed flow passage. A movable passage formed so that the entrance and the exit correspond to the entrance of the fixed passage, and a moving mechanism for moving the movable passage in a direction intersecting with the flow direction of the sealing material. I did it.

As a result of taking the above measures, the following operation occurs. That is, in the invention described in claim 1, the valve body provided between the syringe and the nozzle has a hole that is opened only on the side surface thereof, and the hole is provided with a recess provided in the needle. Since the closure is performed, the sealing material in the syringe is not pushed out by the operation of the needle. Therefore, the sealing material does not aggregate at the tip of the nozzle. Therefore, there is no need to perform nozzle cleaning.

According to the second aspect of the present invention, since the nozzle portion is housed in the nozzle cover and the inside of the nozzle cover can be depressurized, it is possible to remove the sealing material aggregated at the tip of the nozzle portion. For this reason, it is not necessary to move the nozzle to the nozzle cleaning unit or the like during the coating operation to perform the nozzle cleaning, so that the coating operation time can be reduced.

According to the third aspect of the present invention, if the pressure inside the nozzle cover is constantly reduced and the nozzle is housed in the nozzle cover, the sealing material can be removed immediately.
According to the fourth aspect of the present invention, the nozzle portion is housed in the nozzle cover, and the inside of the nozzle cover can be depressurized, so that the sealing material aggregated at the nozzle tip can be removed. For this reason, it is not necessary to move the nozzle to the nozzle cleaning unit or the like during the coating operation to perform the nozzle cleaning, so that the coating operation time can be reduced.

According to the fifth aspect of the present invention, by reducing the pressure, it is possible to remove the sealing material agglomerated at the discharge end. For this reason, it is not necessary to move the nozzle to the nozzle cleaning unit or the like during the coating operation to perform the nozzle cleaning, so that the coating operation time can be reduced.

In the invention described in claim 6, the movable flow path is moved in a direction intersecting with the flow direction of the sealing material with respect to the first fixed flow path connected to the syringe side. The seal material in the syringe is not pushed out by the operation of the movable flow path. Therefore, the sealing material does not aggregate at the tip of the nozzle. Therefore, there is no need to perform nozzle cleaning.

[0021]

FIG. 1 is a view showing the configuration of a sealing material applying apparatus 20 according to a first embodiment of the present invention. The sealant applying device 20 includes a dispenser mechanism 30 and an XY table 4 supporting a glass plate W to which the sealant is applied.
0.

The dispenser mechanism 30 includes a syringe 31 formed in a cylindrical shape and containing a sealing material, and a syringe 31
A nozzle 32 attached to the lower end in FIG. 1, a needle 33 provided coaxially with the syringe 31 and reciprocally movable in the axial direction thereof, and a needle 33 attached to the upper end of the syringe 31 in FIG. And a controller 35 for controlling the solenoid 34.

The syringe 31 is connected to an air source 36 for pressurizing the inside of the syringe 31 to a predetermined pressure, a regulator 37 for adjusting the pressure, and a seal material supply tank 38 for supplying a seal material to the inside of the syringe 31. ing. In FIG. 1, reference numerals 39a, 39b and 38a indicate on-off valves.

The nozzle (nozzle portion) 32 includes a nozzle body 32a and a flow path 32b provided inside the nozzle body 32a. In FIG. 1, reference numeral 32c denotes a nozzle tip. As shown in FIGS. 2A and 2B, a partition wall 50 is formed in the syringe 31, and a flow path 51 is formed in the center of the partition wall 50. In the figure, reference numeral 50a denotes a valve body sealing surface. Further, a valve body 52 is formed at an upper portion of the flow path 51 in FIG. An opening 52a (K = diameter 1 mm) is provided on the side surface of the valve body 52.
Round hole or square hole with a width of about 1 mm) is formed,
The channel 3 communicates with the channel 51 described above, and further, the channel 3 of the nozzle 32.
2b. The upper part 5 of the valve body 52 in FIG.
2b is chamfered.

On the other hand, at the lower end in FIG. 2 of the needle 33, a concave portion 33a to be fitted to the above-described valve body 52 is formed, and as shown in FIG. 2B, the opening 52a is closed in a liquid-tight manner. be able to.

The sealing material coating apparatus 2 configured as described above
At 0, the sealing material is applied as follows. That is, the needle 33 is lowered by the solenoid 34, and the opening 52 a of the valve body 52 is closed. And the on-off valve 38
a is opened to supply an appropriate amount of sealing material into the syringe 31 from the sealing material supply tank 38. The on-off valve 39a is kept open.

After supplying an appropriate amount, the on-off valve 38a is closed,
The on-off valve 39a is closed, and the on-off valve 39b is opened. Syringe 3
Air is supplied from the air source 36 to the space in the device 1, and the pressure of the sealing material is increased to the pressure set by the regulator 37.

Subsequently, the glass plate W is positioned by the XY table 40 so that the dispenser mechanism 30 coincides with a predetermined coating start position. The controller 35 operates the solenoid 34 to raise the needle 33. As a result, the opening 52a of the valve body 52 comes into contact with the sealing material,
Due to the difference between the pressure of the sealing material and the pressure of the nozzle tip 32c (the pressure of the sealing material is high), the sealing material flows into the flow path 32b of the nozzle 32, and the sealing material is discharged from the nozzle tip 32c. The discharge of the sealing material is performed by the on-off valve 3
9b is opened and the space inside the syringe 31 is always kept under a predetermined pressure.

In this state, the glass plate W is moved based on the coating shape predetermined by the XY table 40.
When the dispensing end point is reached, the solenoid 34 is activated,
The needle 33 is lowered. Recess 33a of needle 33
By fitting into the valve body 52, the opening 52a is closed, and the flow of the sealing material is completely stopped.

FIG. 12 shows the direction in which the sealing material moves as the needle 33 descends. When the discharge of the sealing material is ON, it flows into the opening 52a at a constant flow rate in the flow direction P of the sealing material. The speed at this time is, for example, about 0.3 mm to 1 mm / s. When the needle 33 is lowered to turn off the discharge, the flow of the sealing material in the vicinity of the valve body 52 is in the direction Q.

The reason is that the descending speed of the needle 33 is set to 150 mm / s or more, and the flow speed of the seal material in the direction P is negligible compared to the flow speed of the seal material in the Q direction. About small. Therefore, the flow of the sealing material in the direction P is lost. Therefore, the sealing material does not flow into the opening 52a due to the lowering of the needle 33, and the sealing material does not protrude from the nozzle tip 32c.

The flow of the sealing material in the direction Q causes the valve element 52 to flow.
What is going to flow into the opening 52a of the needle 3
Due to the relationship between the descending speed of 3 and the size of the hole of the opening 52a, the flow of the sealing material in the direction Q occurs, and the flow does not occur.

As a result, aggregation of the sealing material at the nozzle tip 32c is eliminated, and no liquid lumps are generated at the next application start position. Therefore, nozzle cleaning is not required, and the application work time can be significantly reduced.

Since the valve body 52 and the needle 33 can be easily disassembled, there is also an advantage that the maintenance property is good when the sealing material is changed. As described above, in the sealing material applying apparatus 20 according to the first embodiment, when the needle 33 is lowered to stop the discharge of the sealing material, there is no sealing material to be pushed out. The material is not aggregated, and as a result, the application can be started from the next application start position without performing nozzle cleaning. For this reason, the application work time can be reduced.

FIGS. 4 (a) and 4 (b) are views showing a sealing material applying device 60 according to a second embodiment of the present invention, and FIG. 5 is a longitudinal sectional view showing a main part of the sealing material applying device 60. It is. The sealing material application device 60 includes an XY table 80 that supports a dispenser mechanism 70 and a glass plate W to which the sealing material is applied.
And

The dispenser mechanism 70 includes a base plate 71 having a vertical surface, a cylindrical syringe 72 attached to the base plate 71, and a nozzle 73 provided at the lower end of the syringe 72 in FIG. And a nozzle cleaning mechanism 90 for cleaning the nozzle 73. The nozzle 73 is a nozzle body 73a as shown in FIG.
And a small-diameter nozzle tip 73b. A nozzle port 73c is formed at the tip of the nozzle tip 73b.
A dispenser air supply port 72a is provided at the upper end of the syringe 72 in FIG.

The cleaning mechanism 90 extends in the horizontal direction attached to the base plate 71, and
A solenoid fixture 92 fixed to the base 91, a solenoid 92 attached to the base 91 and having a vertical operation direction, a vacuum jig 94 connected to the solenoid 92 via a connecting rod 93, And an ejector 95 for reducing the pressure in the vacuum chamber 103. In FIG. 5, 93a indicates a stopper.

The nozzle fixing jig 91 has a through hole 91a of the nozzle 73, a through hole 91b of the connecting rod 93,
3 is provided with a cylindrical member 91c formed coaxially with 3 and a flow path 91d communicating with the inside of the ejector 95. A slight gap is formed between the tubular member 91c and the nozzle body 73a, and communicates with the flow path 91d. In FIG. 5, reference numeral 91e denotes an O-ring.

A nozzle cover 100 is mounted on the left end of the vacuum jig 94 in FIG. The nozzle cover 100 includes a hollow conical cover body 101 and a vacuum port 102 provided at a lower end of the cover body 101.
And a vacuum chamber 103. The diameter of the vacuum port 102 is larger than that of the nozzle port 73c by 1 to 2 mm. The cover body 101 is slidably attached to the cylindrical member 91c via an O-ring 104 in the direction of arrow Z in FIG. That is, the vacuum chamber 103
The ring 104 is closed except for the vacuum 102, and by operating the ejector 95, a low pressure state (−
About 400 to -500 mmHg).

The sealing material coating apparatus 6 configured as described above
At 0, the sealing material is applied as follows. That is, when discharging the sealing material, as shown in FIG. 6A, the application is performed in a state where the nozzle port 73c is exposed from the vacuum 102.

When the application of the sealing material is completed, the nozzle port 73
The sealing material P remains and aggregates in c. By operating the solenoid 92, the vacuum jig 94 is lowered until the stopper 93a comes into contact with the nozzle fixing jig 91. Therefore, the vacuum slot 102 is located below the nozzle port 73c, and the nozzle port 73c is housed in the cover main body 101.

At this time, since the inside of the vacuum chamber 103 is depressurized as described above (because it is in a depressurized atmosphere), the sealing material P aggregated at the nozzle port 73c is removed from the nozzle port 73c. This nozzle cleaning operation is completed during the movement of the coating pattern from the coating end position to the coating start position during drawing (or from the end of coating to the start of drawing of the next coating pattern). This eliminates the need to move to the nozzle cleaning section for nozzle cleaning.

The sealing material P accumulated in the vacuum chamber 103 or the like is removed from the vacuum jig 9 after the application of the sealing material.
4 is removed. By operating the ejector 95, the vacuum chamber 103 is pressurized and discharged.

As described above, according to the sealing material applying apparatus according to the second embodiment, since the sealing material P agglomerated in the nozzle port 73c can be removed, the moving distance to the application start position of the next application pattern can be reduced. Nozzle cleaning can be performed. As a result, there is no movement for nozzle cleaning, and the application work time is minimized.

The dispenser mechanism 70 of the sealant applying device 20 according to the first embodiment described above may be used instead of the dispenser mechanism 70 in the sealant applying device 60 according to the second embodiment. . Thereby, the number of times of nozzle cleaning can be reduced, the coating time can be further reduced, and productivity can be improved.

FIGS. 7A to 7C are longitudinal sectional views showing a main part of a dispenser mechanism 110 incorporated in a sealing material applying apparatus according to a third embodiment of the present invention. The dispenser mechanism 110 includes a syringe 111 formed in a cylindrical shape and containing a sealant, and a discharge control unit 12 attached to the lower end of the syringe 111 in FIGS. 7A and 7B.
0, and a nozzle 112 attached to the center of the ejection control unit 120 in FIGS. 7A and 7B. In addition, a pressure control unit (not shown) that controls the pressure inside the syringe 111 is connected to the syringe 111.

The nozzle 112 includes a nozzle body 112a,
And a channel 112b provided therein. In FIG. 7, reference numeral 112c denotes a nozzle tip. (A) of FIG.
As shown in (c), the ejection control unit 120 includes a cylindrical main body 121 and a syringe 111 provided inside the main body.
Flow part 1 for flowing the sealing material P from the nozzle to the nozzle 112
22 and the main body 12
A space portion 123 having an opening 124 on one side surface;
An opening / closing mechanism 125 attached to the opening 124 is provided.

The main body 121 is connected to the syringe 111 via a connecting member 121a. The flow passage 122 includes a first flow passage 122 a provided between the syringe 111 and the space 123, a space 123 and a guide path 123 c described later.
And a second flow path (first fixed flow path) 122 provided between
b, a third flow path (movable flow path) 122c provided in a small diameter portion 126a of the valve 126 described later, and a guide path 123c.
And a fourth flow path (second fixed flow path) 122d provided between the nozzle and the nozzle 112.

The space 123 has an opening on the side surface of the main body 121, and a first space 123a to be described later and the first space 123a.
The second space provided above the space 123a in FIG.
The space 12 b and the valve 12 from the first space 123 a
And a guide path 123c for guiding the small-diameter portion 126a of FIG.

The opening / closing mechanism 125 includes a valve 126 having a small-diameter portion 126a and a large-diameter portion 126b.
The connector 127 includes a connector 127 having one end connected to the large diameter portion 126b of the connector 26, and a solenoid 128 connected to the other end of the connector 127. Note that the solenoid 128 drives the valve 126 in the directions of arrows α1 and α2 as shown in FIGS. 7 (a), (b) and FIG. Also,
7 (a) to 7 (c) and 129 in FIG.
5 shows an O-ring fitted to the outer periphery of the large diameter portion 126b of the valve 126. The large diameter portion 126b of the valve 126 is
Is slid in a liquid-tight manner on the inner surface.

In FIG. 9, reference numeral 130 denotes a pedestal.
An opening / closing mechanism 125 is provided on the pedestal 130 with fixing screws 131.
, And the solenoid 128 is fixed by a solenoid fixing jig 132.

The dispenser mechanism 1 configured as described above
The discharge control unit 120 controls ON / OFF of discharge of the sealing material P as follows. In addition, syringe 1
The pressure in 11 is maintained at a predetermined pressure. First, the valve 126 is moved by the solenoid 128 to the arrow α in FIG.
The valve 126 is moved in one direction, and the small diameter portion 126a of the valve 126 is moved along the guide path 123c. As a result, the outlet of the second channel 122b and the inlet of the third channel 122c do not match. Thereby, the sealing material P is closed by the outer wall surface of the small diameter portion 126a.

On the other hand, the valve 12 is operated by the solenoid 128.
6 in the direction of the arrow α2 in FIG.
26 is moved along the guide path 123c. Thereby, the outlet of the second channel 122b and the inlet of the third channel 122c, and the outlet of the third channel 122c and the inlet of the fourth channel 122d are made to coincide with each other, and the sealing material P flows. .

At the end of the application, the solenoid 128 is operated, the valve 123 is moved, and the flow of the sealing material is completely stopped. As described above, according to the present embodiment, the valve 123 moves while intersecting (orthogonal in the present embodiment) with respect to the flow direction of the sealing material P. Does not flow into the fourth flow path 122d, and the sealing material does not protrude from the nozzle tip 112c.

As a result, aggregation of the sealing material at the nozzle tip 112c is eliminated, and no liquid lumps are generated at the next application start position. Therefore, nozzle cleaning is not required, and the application work time can be significantly reduced.

As described above, in the dispenser mechanism 110 according to the third embodiment, when the discharge of the sealing material P is stopped, the sealing material P is not pushed out. As a result, application can be started from the next application start position without performing nozzle cleaning. For this reason, the application work time can be reduced.

FIGS. 10A and 10B are diagrams showing the main part of the ejection control section according to a first modification of the third embodiment. The discharge control unit 140 includes a main body 141 and the main body 14.
And a flow portion 142 provided therein.

In the main body 141, a gap 141a having a circular cross section is formed, and a columnar movable piece 141b is rotatable in the gap 141a in the direction of the arrow β in FIG. They are fitted liquid tight. Movable piece 14
1b is rotationally driven by a drive motor (not shown).

The flow portion 142 is formed in the main body 141,
A first flow path (first fixed flow path) 142a whose inlet is arranged on the side of the syringe 111, a second flow path (movable flow path) 142b formed in the movable piece 141b, and a third flow path (first flow path). Second
142c).

The discharge control unit 140 configured as described above controls ON / OFF of the discharge of the sealing material P as follows. That is, the movable piece 141b is driven by the drive motor.
Is rotated to stop at the position shown in FIG.
Thereby, the outlet of the first flow path 142a and the second flow path 1
The inlet of 42b, the outlet of the second flow path 142b, and the outlet of the third flow path 142c coincide, and the sealing material P flows.

On the other hand, the movable piece 141b is stopped at the position shown in FIG. This allows
The outlet of the first channel 142a and the inlet of the second channel 142b do not match, and the sealing material P is closed by the outer wall surface of the movable piece 141b.

As described above, according to the present embodiment,
Since the movable piece 141b rotates about an orthogonal direction to the flow direction of the seal material P, the seal material P does not flow into the third flow path 142c with the rotation of the movable piece 141b, and the nozzle The protrusion of the sealing material P from the tip 112c is eliminated. Therefore, also in the first modified example, the same effect as in the third embodiment can be obtained.

FIGS. 11A and 11B are diagrams showing the main parts of a discharge control unit 150 according to a second modification of the third embodiment. The discharge control unit 150 includes a cylindrical main body 151.
And a communication part 152 provided inside the main body 151.

The main body 151 is formed by stacking a first fixed portion 151a, a movable portion 151b, and a second fixed portion 151c. The movable part 151b is a first fixed part 151a.
And the second fixing portion 151c is rotatably provided in the direction of arrow γ in FIG. The movable section 151b is driven to rotate by a drive motor (not shown).

The flow section 152 includes a first flow path (first fixed flow path) 152a provided in the first fixed section 151a and a second flow path provided in the movable section (movable flow path) 151b. Road 15
2b and a third flow path (second fixed flow path) 152c provided in the second fixing portion 151c.

The discharge control unit 150 configured as described above controls ON / OFF of the discharge of the sealing material P as follows. That is, the movable portion 151b is driven by the drive motor.
Is rotated to stop at the position shown in FIG.
Thereby, the outlet of the first channel 152a and the second channel 1
The inlet of 52b, the outlet of the second channel 152b, and the outlet of the third channel 152c coincide, and the sealing material P flows.

On the other hand, the movable portion 151b is stopped at the position shown in FIG. This allows
The outlet of the first channel 152a and the inlet of the second channel 152b do not match, and the sealing material P is closed by the end face of the movable portion 151b.

As described above, according to the present embodiment,
Since the movable portion 151b rotates in a direction orthogonal to the flow direction of the seal material P, the seal material P does not flow into the third flow path 152c with the movement of the movable portion 151b, and the movable member 151b moves from the nozzle tip 112c. The protrusion of the sealing material P is eliminated. Therefore, in the second modified example, the third
The same effect as that of the embodiment can be obtained. In addition,
The present invention is not limited to the embodiments, and it is needless to say that various modifications can be made without departing from the spirit of the present invention.

[0069]

According to the present invention, since the sealing material does not agglomerate at the nozzle tip, there is no need to perform nozzle cleaning, the application work time can be reduced, and the production efficiency can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a sealing material applying device according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a main part of the sealing material applying device.

FIG. 3 is a diagram schematically showing a flow of a sealing material in a main part of the sealing material applying apparatus.

FIG. 4 is a diagram showing a configuration of a sealing material applying device according to a second embodiment of the present invention.

FIG. 5 is a longitudinal sectional view showing a main part of the sealing material applying device.

FIG. 6 is a longitudinal sectional view showing a nozzle cleaning operation in the sealing material applying device.

FIG. 7 is a longitudinal sectional view showing a main part of a sealing material applying device according to a third embodiment of the present invention.

FIG. 8 is a perspective view showing a discharge control unit incorporated in the sealing material application device.

FIG. 9 is an exploded perspective view showing the discharge control unit.

FIG. 10 is a longitudinal sectional view showing a first modification of the discharge control unit.

FIG. 11 is a longitudinal sectional view showing a second modification of the discharge control unit.

FIG. 12 is a longitudinal sectional view showing a main part of a conventional sealing material applying apparatus.

[Explanation of symbols]

 Reference Signs List 20 sealing device applying device 30 dispenser mechanism 31 syringe 32 nozzle 33 needle 33a concave portion 52 valve body 52a opening 60 sealing material applying device 70, 110 dispenser mechanism 73, 113 nozzle 90 cleaning Mechanism 91: Nozzle fixing jig 94: Vacuum jig 95: Ejector 100: Nozzle cover 102: Vacuum port 103: Vacuum chamber 120, 140, 150: Discharge control unit

Claims (6)

[Claims] A cylindrical syringe accommodating a sealing material; a pressure control unit for controlling a pressure in the syringe; a nozzle unit provided at one end of the syringe for discharging the sealing material; A partition wall provided with a flow path for allowing the sealing member to flow between the nozzle portion and the syringe while liquid-tightly partitioning the nozzle portion and the syringe; and an interior of the syringe of the partition wall. A valve body provided on the side thereof and provided coaxially with the syringe; and a concave portion provided coaxially with the syringe and reciprocally movable in the axial direction thereof, and a tip of which is fitted with the valve body. A needle, and a drive unit for driving the needle in the axial direction. The valve body has an opening only on a side surface along the driving direction of the needle, and the opening is provided with the flow passage. I will communicate with the road The concave portion of the needle is formed so as to be able to close the opening when fitted to the valve body. 2. A syringe accommodating a sealing material, a pressure control unit for controlling a pressure in the syringe, a nozzle unit provided at one end of the syringe for discharging the sealing material, and a nozzle unit A sealing material coating device, comprising: a nozzle cover that covers the front end of the nozzle cover so as to be freely exposed and stored; and a pressure reducing unit that reduces the pressure inside the nozzle cover. 3. The sealing material applying apparatus according to claim 2, wherein the nozzle cover is formed so that the tip of the nozzle is freely exposed and housed. 4. A cylindrical syringe accommodating a sealing material, a pressure control unit for controlling a pressure in the syringe, a nozzle unit provided at one end of the syringe for discharging the sealing material, A base attached to the nozzle portion, a nozzle cover attached to the base and attached coaxially to the nozzle, and an opening formed at the bottom thereof; and a nozzle cover attached to the base and extending the nozzle cover in its axial direction. A sealing material applying device, comprising: an actuator that moves the nozzle to expose the tip of the nozzle from the opening; and a pressure reducing mechanism that reduces the pressure inside the nozzle cover. 5. A method for applying a seal material contained in a syringe using a needle provided at one end of the syringe and discharging the seal material, wherein the syringe is applied from the end of the application of the seal material. A method of applying a seal material, comprising a step of storing an end portion of the seal material discharged before a predetermined time before the start of application of the next seal material in a reduced-pressure atmosphere. 6. A syringe for accommodating a sealing material, a pressure control unit for controlling a pressure in the syringe, a nozzle unit provided at one end of the syringe for discharging the sealing material, and the syringe And a discharge control section provided between the nozzle section and the flow path of the seal material. The discharge control section has a first fixed flow path having an inlet side connected to the syringe side. And a second fixed channel whose outlet side is connected to the nozzle portion side, and an inlet and an outlet respectively correspond to the outlet of the first fixed channel and the inlet of the second fixed channel. And a moving mechanism for moving the movable flow path in a direction intersecting the flow direction of the seal material.