JPH11300254A - Dispensing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly consume an injecting material in a syringe by spreading smoothly air along the inner wall of a syringe cap with a specified funnel shape in a dispensing apparatus used when two sheets of facing glass bases, etc., are bonded in a liq. crystal display apparatus. SOLUTION: A dispensing apparatus stores an injecting material 2 in it and is provided with a syringe 1 with a nozzle part 3 on its bottom part. In addition, a syringe cap 4 molded into a funnel shape so as to spread smoothly air 5 fed from an air pipeline 4 along the inside of the syringe, is provided. The air 5 fed from the air pipeline 4 is spread thereby along the inner wall of the syringe 1 from a funnel-shaped sylinge cap 6 to press the injecting material 2. I.e., the air 5 is spread smoothly in the syringe cap 6 and it is possible to prevent the air 5 from being concentrated at the central part of the injecting material 2 and to improve responding speed to injection to increase/decrease in feeding pressure of the air 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dispensing device used for discharging a high-viscosity solution such as a sealing material for bonding two opposing glass substrates to a liquid crystal display device. .

[0002]

2. Description of the Related Art FIG. 10 is a sectional view showing a conventional dispensing device. In the figure, reference numeral 1 denotes a syringe that stores a discharge material 2 and has a nozzle 3 at a lower portion, and 4 denotes an air pipe that supplies air 5 into the syringe 1. Air 5 is supplied via the air pipe 4 into the syringe 1 in which the ejection material 2 is stored,
The ejection material 2 is extruded from the nozzle 3 and applied to a substrate or the like. FIG. 11 is a cross-sectional view showing another conventional dispensing device, in which a piston 15 is disposed above the discharge material 2 stored in the syringe 1, and air supplied into the syringe 1 via the air pipe 4. 5 pressurizes the piston 15.

[0003]

The conventional dispensing device is constructed as described above. In the dispensing device having the structure shown in FIG. 10, the air 5 supplied into the syringe 1 through the air pipe 4 is used. Is colliding with the central portion of the discharge material 2 in the syringe 1, so that a concave portion is formed in the central portion of the discharge material 2, and only the central portion of the discharge material 2 in the syringe 1 is locally consumed and There is a problem that the ejection material 2 in the inside is not consumed uniformly. Further, in an extreme case, as shown in FIG. 12, only the central portion of the discharge material 2 is lost in the syringe 1 and the discharge material 2 remains in the peripheral portion of the syringe 1 even though the discharge material 2 remains. 2 is not ejected normally.
This is particularly likely to occur when high-pressure air is supplied to a high-viscosity ejection material such as a sealing material to perform application. Further, in the dispensing apparatus having the structure shown in FIG. 11, when a high-viscosity sealing material or the like is used as the discharge material 2, the response to the increase or decrease of the supplied air 5 pressure tends to be slow. When filling the discharge material 2 or cleaning the syringe 1, there is a problem that handling such as attachment and detachment of the piston 15 is difficult.

[0004] The present invention has been made to solve the above-described problems. Even when the ejection material is a high-viscosity solution, the ejection material in the syringe can be consumed uniformly and the syringe can be used in the syringe. It is an object of the present invention to provide a dispensing device which has a good response speed to discharge with respect to an increase and decrease in supplied air pressure, and which is easy to handle such as filling a discharge material and washing a syringe.

[0005]

A dispensing apparatus according to the present invention has a nozzle at a lower portion and stores a discharge material, an air pipe for supplying air to the syringe, and a pipe provided between the syringe and the air pipe. A syringe cap having a funnel shape having a narrow air pipe side and expanding toward the syringe side is provided, and air supplied from the air pipe is configured to smoothly spread along the inner wall of the syringe cap. The spread angle of the syringe cap having a funnel shape is less than 45 degrees. In the syringe cap having a funnel shape, a portion where the diameter of the funnel shape starts to expand has an arc-shaped curved structure.

Further, a member for changing a flow of air supplied from an air pipe and smoothly spread along an inner wall of the syringe cap is provided at a joint between the syringe and the syringe cap. The member that changes the flow of air supplied from the air pipe and smoothly spreads along the inner wall of the syringe cap is a donut-shaped barrier having an opening having a diameter smaller than the diameter of the syringe. The member that changes the flow of air supplied from the air pipe and smoothly spreads along the inner wall of the syringe cap is a flow guiding portion having a plurality of spirally bent blades. The member that changes the flow of air supplied from the air pipe and smoothly spreads along the inner wall of the syringe cap is configured to be able to be attached and detached simultaneously with attachment and detachment of the syringe cap.

In addition, a syringe having a nozzle at a lower portion for storing a discharge material, an air pipe for supplying air to the syringe, a syringe cap provided between the syringe and the air pipe, and a joint between the syringe and the syringe cap A portion provided with an air pipe and having a wall portion at a portion where the air is blown out and supplied from the air pipe, and the air supplied from the air pipe collides with the wall portion of the barrier portion and is dispersed and supplied into the syringe. It is configured so that: Further, the barrier portion is configured so that it can be attached and detached simultaneously with attachment and detachment of the syringe cap.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a dispensing apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a dispensing device according to Embodiment 1 of the present invention. In the figure, reference numeral 1 denotes a syringe that stores a discharge material 2 and has a nozzle portion 3 at a lower portion, 4 denotes an air pipe that supplies air 5 into the syringe 1, 6 denotes an air pipe provided at an upper portion of the syringe 1, and The syringe cap has a funnel shape so that the supplied air 5 spreads smoothly in the syringe 1.

In the dispensing device according to the present embodiment, the air 5 supplied from the air pipe 4 spreads along the inner wall of the syringe 1 from the funnel-shaped syringe cap 6 because the fluid has a characteristic along the wall. , Syringe 1
The discharge material 2 inside is pressurized. Note that the angle θ of the funnel-shaped portion of the syringe cap 6 is set so that the air 5 supplied from the air pipe 4 surely follows the inner wall of the syringe cap 6.
The acute angle is less than 45 degrees as shown in FIG. Further, for example, a sealing material used for manufacturing a liquid crystal display device is 30 to 180 P
It has a viscosity of a · s, and has a property that the viscosity is changed by prolonged use at room temperature. As this dispensing device, the inner diameter d1 of the air pipe 4 is 5 mm, and the inner diameter d2 of the syringe 1 is 15 mm. , Supply pressure of air 5 is 2-8kg
By adjusting the discharge rate at f / cm ² according to the viscosity of the discharge material and the required discharge amount, good discharge was obtained.

According to the present invention, the shape of the syringe cap 6 provided on the upper part of the syringe 1 is formed in a funnel shape, so that the air 5 supplied from the air pipe 4 allows the fluid to flow along the wall by the syringe cap. 6, the air 5 can be prevented from concentrating on the central portion of the discharge material 2 in the syringe 1, and the air piping 4 can be prevented.
Since the air 5 supplied from the air comes in direct contact with the discharge material 2, the response speed to the discharge with respect to the increase and decrease of the pressure of the supplied air 5 is good. Furthermore, since the structures of the syringe 1 and the syringe cap 6 are simple and no other parts are required, handling such as filling of the discharge material 2 and cleaning of the syringe 1 is simple.

Embodiment 2 FIG. 3 is a sectional view of a dispensing device according to a second embodiment of the present invention. In the figure, reference numeral 7 denotes a syringe cap having a funnel shape provided on the upper portion of the syringe 1 so that the air 5 supplied from the air pipe 4 spreads smoothly into the syringe 1. Arc-shaped curved surface portion 7a (R = 1 to 5m
m). The other configuration is the same as that of the first embodiment, and the description is omitted. According to the present embodiment,
The same effect as in the first embodiment can be obtained, and by providing the arc-shaped curved surface portion 7a at the portion where the funnel-shaped diameter of the syringe cap 7 starts to expand, the characteristics of the fluid along the wall can be emphasized, so that the syringe 1 Further effects can be obtained in preventing the air 5 from being concentrated on the central portion of the discharge material 2.

Embodiment 3 FIG. 4 is a sectional view of a dispensing device according to a third embodiment of the present invention. In the drawing, reference numeral 8 denotes a barrier portion provided on the side of the syringe cap 6 having a funnel shape connected to the syringe 1, and has a structure that is detachable from the syringe 1 simultaneously with attachment and detachment of the syringe cap 6. FIG. 5 is a plan view showing the barrier portion 8. The barrier portion 8 has a donut shape having an opening 8a at the center.
The other configuration is the same as that of the first embodiment, and the description is omitted.

In the dispensing device according to the present embodiment, the air 5 supplied from the air pipe 4 spreads along the inner wall of the syringe 1 from the funnel-shaped syringe cap 6 because the fluid has a characteristic along the wall. Then, the discharge material 2 in the syringe 1 which is further dispersed by the barrier portion 8 is pressurized. The diameter d of the opening 8a provided in the barrier 8
3 is to secure two-thirds of the inner diameter d2 of the syringe.

According to the present embodiment, the shape of the syringe cap 6 provided on the upper part of the syringe 1 is formed in a funnel shape and the barrier portion 8 is provided, so that the air 5 supplied from the air pipe 4 is supplied with a fluid. Due to the characteristics along the wall, the inside of the syringe cap 6 spreads smoothly and is further dispersed by the barrier portion 8, so that a further effect can be obtained in preventing the air 5 from being concentrated on the central portion of the discharge material 2 in the syringe 1. By providing the barrier portion 8 with an opening 8a sufficient to supply the air 5, the response speed to the ejection with respect to the increase and decrease of the pressure of the supplied air 5 is good. further,
Since the barrier portion 8 can be attached and detached at the same time as the attachment and detachment of the syringe cap 6, handling such as filling of the ejection material 2 and washing of the syringe 1 is simple.

Embodiment 4 FIG. 6 is a sectional view of a dispensing device according to a fourth embodiment of the present invention. In the drawing, reference numeral 9 denotes a flow guiding portion provided on a side of the syringe cap 6 having a funnel shape connected to the syringe 1 and has a plurality of spirally bent flow guiding blades 9a. It has a structure that can be attached and detached from the syringe 1 at the same time as attachment and detachment. FIG. 7 shows the structure of the flow guiding portion 9, wherein (a)
Is a plan view, and (b) is a side view. The other configuration is the same as that of the first embodiment, and the description is omitted.

In the dispensing apparatus according to the present embodiment, the air 5 supplied from the air pipe 4 spreads along the inner wall of the syringe 1 from the funnel-shaped syringe cap 6 because the fluid has a characteristic along the wall. And the discharge material 2 in the syringe 1 is further rectified and dispersed by the flow guiding portion 9.
Press. The total area of the flow guide blade 9a provided in the flow guide section 9 is at least half the area obtained by the syringe inner diameter d2. The bending angle of the flow guiding blade 9a is 3
About 0 to 60 degrees is desirable.

According to the present embodiment, the shape of the syringe cap 6 provided on the upper part of the syringe 1 is made funnel-shaped and the flow guiding portion 9 is provided, so that the air 5 supplied from the air pipe 4 is a fluid. Due to the characteristic along the wall, the inside of the syringe cap 6 spreads smoothly and is further rectified and dispersed by the flow guiding portion 9, so that the discharge material 2 in the syringe 1
A further effect can be obtained in preventing the concentration of the air 5 at the central portion of the air, and a sufficient flow path for supplying the air 5 is provided in the flow guiding portion 9 so that the pressure of the supplied air 5 can be reduced. Good response speed to ejection. Further, since the flow guide section 9 can be attached and detached simultaneously with the attachment and detachment of the syringe cap 6, handling such as filling of the discharge material 2 and washing of the syringe 1 is simple.

Embodiment 5 FIG. 8 is a sectional view of a dispensing device according to a fifth embodiment of the present invention. In the drawing, reference numeral 10 denotes a syringe cap having the same shape as that of the related art (the diameter of the connection portion with the air pipe extends at a right angle from the diameter of the connection portion with the syringe), and 11 denotes the syringe cap 10 connected to the syringe 1 A barrier portion provided in the portion has a structure that is detachable from the syringe 1 at the same time as the syringe cap 10 is detached. FIGS. 9A and 9B show the structure of the barrier portion 11, wherein FIG. 9A is a plan view and FIG. 9B is a cross-sectional view.
As shown in the drawing, the barrier portion 11 includes a central wall portion 11a,
A plurality of openings 11b provided around the wall 11a
Consists of The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the dispensing apparatus according to the present embodiment, the air 5 supplied from the air pipe 4 collides with the wall 11a of the barrier portion 11 and is dispersed, so that the ejection material 2 in the syringe 1 is dispersed.
Press. In addition, the wall part 11a provided in the barrier part 11
Has a diameter equal to or greater than the diameter d1 of the air pipe, and the combined area of the openings 11b is equal to or greater than half the area obtained by the inner diameter d2 of the syringe.

According to the present embodiment, by providing the barrier 11 at the connection between the syringe cap 10 and the syringe 1 provided on the upper part of the syringe 1, the air 5 supplied from the air pipe 4 is supplied to the barrier 11. The air 5 can be prevented from concentrating on the central portion of the discharge material 2 in the syringe 1 because it collides with the wall 11a of the Sufficient opening 11b
Is provided, the response speed to the discharge with respect to the increase and decrease of the supplied air 5 pressure is good. Further, the barrier portion 11
Can be attached and detached at the same time as the attachment and detachment of the syringe cap 10, so that handling such as filling of the ejection material 2 and washing of the syringe 1 is simple.

[0021]

As described above, according to the present invention, since the shape of the syringe cap provided at the upper part of the syringe is formed in a funnel shape, the air supplied from the air pipe can be changed depending on the characteristics of the fluid along the wall. , The air supplied from the air pipe can be prevented from concentrating on the central portion of the discharge material stored in the syringe, and the air supplied from the air pipe can be directly discharged. Since it is in contact with the material, it is possible to obtain a dispensing device which has a good response speed to the discharge with respect to the increase and decrease of the supplied air pressure, and which is easy to handle such as filling the discharge material and washing the syringe.

In addition, a member for further dispersing or rectifying and dispersing the air that has smoothly spread inside the syringe cap is provided at the connection between the syringe and the syringe cap, and the member has a sufficient air supply flow path. Thereby, the members are stored in the syringe without reducing the response speed to the discharge with respect to the increase and decrease of the air pressure, and without reducing the handleability of the device by configuring the members so that they can be attached and detached simultaneously with attachment and detachment of the syringe cap. A further effect is obtained in preventing the concentration of air supplied from the air pipe to the central portion of the discharge material.

Also, in the dispensing device having the conventional structure, a connecting portion between the syringe cap and the syringe provided at the upper part of the syringe is provided with a barrier portion having a wall at a portion where the air supplied from the air pipe is jetted. Thereby, the air supplied from the air pipe can be prevented from being concentrated on the central portion of the discharge material stored in the syringe, and the barrier portion can be configured to be attached and detached simultaneously with attachment and detachment of the syringe cap. Thereby, the handling of the device is not reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a dispensing device according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a syringe cap of the dispensing device according to the first embodiment of the present invention.

FIG. 3 is a sectional view showing a dispensing device according to a second embodiment of the present invention.

FIG. 4 is a sectional view showing a dispensing device according to Embodiment 3 of the present invention.

FIGS. 5A and 5B are a plan view and a sectional view showing a barrier portion of a dispensing device according to a third embodiment of the present invention.

FIG. 6 is a sectional view showing a dispensing device according to a fourth embodiment of the present invention.

FIG. 7 is a side view and a cross-sectional view showing a flow guide of a dispensing device according to a fourth embodiment of the present invention.

FIG. 8 is a sectional view showing a dispensing device according to a fifth embodiment of the present invention.

FIG. 9 is a plan view and a cross-sectional view showing a flow guiding unit of a dispensing device according to a fifth embodiment of the present invention.

FIG. 10 is a sectional view showing a conventional dispensing device of this type.

FIG. 11 is a sectional view showing another conventional dispensing device.

FIG. 12 is a diagram for explaining a problem of a conventional dispensing device.

[Explanation of symbols]

1 syringe, 2 discharge materials, 3 nozzles, 4 air piping, 5 air, 6 syringe cap, 7 syringe cap, 7a curved surface, 8 barrier, 8a opening, 9
Guide section, 9a Guide blade, 10 Syringe cap, 1
1 barrier, 11a wall, 11b opening.

Claims (9)

[Claims] 1. A syringe having a nozzle at a lower portion for storing a discharge material, an air pipe for supplying air to the syringe, and a pipe provided between the syringe and the air pipe, wherein the side of the air pipe is thin and the side of the syringe A dispensing device, comprising: a syringe cap having a funnel shape that is widened to the air, wherein air supplied from the air pipe is configured to smoothly spread along an inner wall of the syringe cap. 2. The divergent angle of the syringe cap having a funnel shape is less than 45 degrees.
A dispensing device as described. 3. A syringe cap having a funnel shape,
The dispensing device according to claim 1 or 2, wherein a portion where the diameter of the funnel shape starts to expand is an arc-shaped curved portion. 4. A member for changing a flow of air supplied from an air pipe and smoothly spread along an inner wall of the syringe cap is provided at a joint between the syringe and the syringe cap. The dispensing device according to any one of claims 1 to 3. 5. The member that changes the flow of air that is supplied from an air pipe and smoothly spreads along the inner wall of the syringe cap is a donut-shaped barrier having an opening having a diameter smaller than the diameter of the syringe. The dispensing device according to claim 4, characterized in that: 6. The member for changing the flow of air supplied from the air pipe and spread smoothly along the inner wall of the syringe cap is a flow guiding portion having a plurality of spirally bent blades. The dispensing device according to claim 4, wherein 7. A member for changing a flow of air supplied from an air pipe and smoothly spread along an inner wall of the syringe cap is configured to be detachable and attached simultaneously with attachment and detachment of the syringe cap. The dispensing device according to any one of claims 4 to 6. 8. A syringe having a nozzle at a lower portion for storing a discharge material, an air pipe for supplying air to the syringe, a syringe cap provided between the syringe and the air pipe, and the syringe and the syringe. It is provided at the joint of the cap,
A barrier portion having a wall portion is provided at a portion where the air is supplied from the air piping and the air is blown out. The air supplied from the air piping collides with the wall portion of the barrier portion, is dispersed, and is supplied into the syringe. A dispensing device characterized by being configured as described above. 9. The dispensing device according to claim 8, wherein the barrier portion is configured to be attached and detached simultaneously with attachment and detachment of the syringe cap.