JPH08182950A - Liquid drip preventive device for dispenser - Google Patents

Abstract

PURPOSE: To provide a liquid drip preventive device for a dispenser in which liquid drip from the tip of a needle is not caused and also liquid is quantified and further the deformation factor of the needle is removed. CONSTITUTION: A dispenser 1 has a needle 5 protruded from a dispenser body 3 housed with liquid. Outside a dispenser body part 3N on the needle 5 side, a cover 11 is put leaving space from the part 3N and the cover 11 is provided with air feeding ports 13, and also air blow-off ports 19 are provided on the outer periphery of the needle 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dripping prevention device for a dispenser that discharges liquid from a needle.

[0002]

2. Description of the Related Art Conventionally, for manufacturing a hard disk driver (HDD), for example, a polyethylene PET frame to which a very thin line of, for example, about 46 μm is bonded is used. A dispenser is used as an adhesive application means for adhering a thin line to the polyethylene PET frame. As shown in FIG. 3, the dispenser 101 includes a dispenser body (barrel) 103 containing, for example, an ultraviolet curable resin as a liquid, and the dispenser body 103 has a lower portion protruding downward. The upper end of the needle 105 is attached.

Therefore, the ultraviolet curable resin contained in the dispenser body 103 is projected from the tip of the needle 105 by the air means and a thin line is applied to the polyethylene PET frame. When the ultraviolet curable resin is discharged from the tip of the needle 105, a dripping S may occur at the tip of the needle 105.

As a preventive measure for preventing the occurrence of the dripping S, an operator wipes the tip of the needle 105 with cloth, sponge or the like after discharging the ultraviolet curable resin.

[0005]

By the way, in the above-mentioned conventional measures for preventing dripping, the needle 105 is pressed against cloth, sponge, etc., so that the needle 105 is deformed,
There is a defect that dust adheres to the needle 105 and the dust adheres to the product. Experiments must be conducted to determine when to change the cloth or sponge.

[0006] In order to bring a cloth, sponge or the like into contact with the tip portion (liquid ejecting portion) of the needle 105, the needle 1
There is a problem in that even the necessary ultraviolet curable resin at the tip of 05 is sucked up and the discharge amount is not stable.

An object of the present invention is to provide a device for preventing dripping of a dispenser, which prevents dripping at the tip of the needle, quantifies the liquid, and eliminates a factor for deforming the needle. It is in.

[0008]

In order to achieve the above object, a dripping prevention device for a dispenser according to a first aspect of the present invention is a dispenser in which a needle is provided so as to protrude from a dispenser body containing a liquid. It is characterized in that a gap is formed on the outside of the dispenser main body portion on the needle side and a cover is covered, an air supply port is provided in this cover, and an air outlet port is provided around the outside of the needle.

The dispenser dripping prevention device of the invention according to claim 2 is characterized in that a guide member integrated with the cover is provided on the protruding outer periphery of the needle.

[0010]

With the above-described device for preventing dripping of the dispenser according to the first aspect of the present invention, when air is supplied from the air supply port of the cover covering the dispenser body on the needle side, the air is supplied to the dispenser body and the cover. It is jetted from an air outlet provided around the outside of the needle through a gap formed between the nozzle and the tip of the needle. As a result, dripping is prevented by blowing off the dripping that occurs at the tip of the needle.

Further, by using the device for preventing dripping of the dispenser according to the second aspect of the present invention, since the guide member integrated with the cover is provided on the protruding outer periphery of the needle, the deformation of the needle is prevented. It

[0012]

Embodiments of the present invention will be described in detail below with reference to the drawings.

Referring to FIGS. 1 and 2, the dispenser 1 includes a dispenser body (barrel) 3 containing, for example, an ultraviolet curable resin as a liquid, and a needle protruding downward is provided at a lower portion of the dispenser body 3. The upper end of 5 is attached. Therefore, the dispenser body 3
The ultraviolet curable resin contained therein is discharged from the tip of the needle 5. The ultraviolet curable resin is discharged from the tip of the needle 5, and a thin line of about 46 μm is bonded onto, for example, a polyethylene PET frame. At this time, dripping S may occur at the tip of the needle 5.

A dripping prevention device 7 for preventing the dripping S
As a cover 1, a gap 9 is formed on the outside of the portion 3N of the dispenser body 3 on the needle 5 side.
1 is covered. A part of the cover 11 is provided with a plurality of air supply ports 13, for example. One end of a pipe 15 is connected to each of the air supply ports 13, and an air source (not shown) is connected to the other end of the pipe 15.

A hollow cylindrical guide member 17 integrated with the cover 11 is provided on the protruding outer periphery of the needle 5.
Is provided, and an air outlet 19 is provided between the guide member 17 and the needle 5.

With the above structure, air from an air source (not shown) is supplied from the air supply port 13 to the gap 9 formed between the dispenser body 3 and the cover 11 through the pipe 15. The air supplied to the gap 9 is further supplied to the air outlet 1 formed between the guide member 17 and the needle 5.
Air is blown downward from 9.

As a result, it is possible to prevent the dripping S existing at the tip of the needle 5 from being blown off by the air and causing the dripping S to the tip of the needle 5 without contact. Further, in order to blow the air to the tip of the needle 5, the air may be intensively blown by supplying the required minimum amount of air to the gap 9.

By eliminating the dripping S, the discharge amount of the ultraviolet curable resin as the liquid can be quantified, and the quality of the liquid can be stabilized without the property variation of the liquid due to the dripping S. Furthermore, since the dripping S is eliminated, the liquid is not scattered when the needle 5 moves. Moreover, the work of wiping the needle 5 is eliminated, and dust or the like does not adhere to the product.

Since the guide member 17 integrated with the protruding outer cover 11 of the needle 5 is provided, the guide member 17 guides the needle 5, so that the deformation of the needle 5 can be prevented.

The present invention is not limited to the above-mentioned embodiments, but can be implemented in other modes by making appropriate changes. In this embodiment, an example in which two air supply ports 13 are provided has been described, but the number may be one or three or more. In addition, the gap 9 is dripping S
A gap that temporarily stores the minimum required amount of air to prevent

[0021]

As can be understood from the above description of the embodiments, the invention according to claim 1 can prevent the occurrence of dripping at the tip of the needle. By eliminating this dripping, the discharge amount of the liquid can be quantified, and the quality of the liquid can be stabilized without variation in the properties of the liquid due to the dripping. Furthermore, since there is no dripping, the liquid does not scatter when the needle moves. Moreover, the work of wiping the needle is eliminated, and dust is not attached to the product.

According to the invention of claim 2, since the guide member guides the needle, the deformation of the needle can be prevented.

[Brief description of drawings]

FIG. 1 is a front view of a dripping prevention device for a dispenser according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a front view of a conventional dispenser.

[Explanation of symbols]

 1 Dispenser 3 Dispenser main body 5 Needle 7 Drip prevention device 9 Gap 11 Cover 13 Air supply port 17 Guide member 19 Air outlet

Claims (2)

[Claims] 1. A dispenser comprising a dispenser body containing a liquid and a needle protruding from the dispenser body, wherein a cover is formed by forming a gap on the outside of the dispenser body portion on the needle side, and an air supply port is provided in the cover. And an air blowing port around the outside of the needle. 2. The dripping prevention device for a dispenser according to claim 1, wherein a guide member integrated with the cover is provided on a protruding outer periphery of the needle.