JPH11165117A - Method and device for cleaning nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To almost completely remove a viscous discharged substance sticking to a nozzle rapidly, and prevent the removed viscous discharged substance from sticking agent to the nozzle. SOLUTION: A winding device 2 mounted on a lift device 1 is equipped with a supply reel 3 for supplying a cleaning member 24, a take-up reel 2 for taking up the member 24 and a guide moving means 7 for gyrating a winding guide 6 through which the member 24 is introduced, to the nozzle 28. Therefore, the winding guide 6 is gyrated to the nozzle 28 supported on a nozzle receiver 29 by moving the winding device 2 upward, so that the cleaning member 24 is tensely wound. Next, the cleaning member 24 wound around the nozzle 28 is moved downward by moving the winding device 2 downward, so that a viscous discharged substance sticking to the nozzle 28 is removed by squeezing. After that, the cleaning member 24 is taken up and consequently, the viscous discharged substance thus removed is prevented from sticking to the nozzle 28 again.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a nozzle cleaning method and apparatus.

[0002]

2. Description of the Related Art As is well known, it has been widely practiced to discharge a viscous substance such as a resin liquid for sealing an electronic component from a nozzle and apply it to a work.
However, at this time, the viscous discharge adheres to the tip of the nozzle and remains.

As a result, the viscous ejected matter adhering and remaining at the tip of the nozzle gradually increases during successive ejections,
As a result, the ejection amount changes, which causes various problems such as making it difficult to apply a fixed amount of the coating and inconstant coating shape.

Therefore, for example, as disclosed in Japanese Patent Application Laid-Open No. 2-6873, it has been proposed to squeeze and remove viscous discharge material adhering and remaining at the tip of a nozzle.

[0005]

However, according to this known removing method, a nozzle for discharging a viscous material is inserted into a cleaning nozzle formed of a hollow body, and the nozzle is attached to the cleaning nozzle on the fixed side. Since the viscous discharge adhered to the tip of the nozzle is removed by the relative movement between the two, the viscous discharge adheres to the outer peripheral surface excluding the tip end surface (nozzle opening surface) of the nozzle. However, the viscous discharge adhered to the tip end face of the nozzle could not be removed.

Therefore, after the viscous discharge adhered to the outer peripheral surface is squeezed and removed, an adsorbent is brought into contact with the tip surface of the nozzle to remove the viscous discharge adhering thereto. The tip of the nozzle (the tip and outer surface of the nozzle)
However, there was a drawback that the viscous ejected material remaining and adhered to the ink cannot be quickly and completely removed.

Further, even if the viscous discharge adhered to the outer peripheral surface is removed by a cleaning nozzle, when the nozzle protrudes, a part of the removed viscous discharge adheres to the nozzle again. It had a fatal drawback of doing so.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described drawbacks, and winds a cleaning member, such as a wire or a string, around a nozzle in a tensioned state, and connects the cleaning member and the nozzle to each other. The present invention has been found that the above-mentioned conventional drawbacks can be eliminated at once by squeezing and removing the viscous discharge material by relative movement between the two.

[0009]

According to a first aspect of the present invention, there is provided a nozzle cleaning method, wherein a cleaning member is wound around a nozzle to which a viscous discharge material is attached, in a state where the cleaning member is tensioned. Next, the viscous ejection material is squeezed and removed by the cleaning member by a relative movement between the cleaning member and the nozzle that separates the nozzle from each other.

The relative movement between the cleaning member wound around the nozzle and the nozzle, which separates the nozzle from each other, is preferably performed so as to move the cleaning member with respect to the nozzle on the fixed side. , A wire, a string, or a tape.

According to a fifth aspect of the present invention, there is provided a nozzle cleaning device for winding a cleaning member on a nozzle to which a viscous discharge material is attached in a tensioned state. A lifting device for moving the device up and down.

The winding device includes a supply reel that supplies a cleaning member, a take-up reel that takes up the cleaning member, a winding guide that supports the cleaning member between the supply reel and the take-up reel, Preferably, a guide moving means for rotating the winding guide with respect to the nozzle is provided,
It is preferable that the cleaning member is formed of any one of a wire, a cord, and a tape.

[0013]

1 is a front view and FIG. 2 is a plan view of FIG. 1. A winding device 2 is mounted on a lifting device 1, and in FIG. The displaced figure is shown.

The winding device 2 includes a supply reel 3, a take-up reel 4, a guide roller 5, a winding guide 6, a guide moving means 7, and the like. The guide roller 5 is rotatably mounted on a bracket 9 fixed to the guide roller 5.
Is also mounted on a bracket 10 fixed to the table 8 of the lifting device 1 so as to be rotatable.

The guide moving means 7 includes a driving device 11
And a pair of spur gears 13a and 13b meshed with the spur gear 12, a rocking plate 14 disposed above the spur gears 13a and 13b, and the like. The driving device 11 is fixed to a bracket 15 fixed to the table 8 of the lifting device 1.

In addition, in FIG. 3 which is a plan view, the mounted state of the swing plate 14 is shown in an enlarged manner.
Are spur gears 13a, 13b via shafts 16a, 16b, etc.
It is attached to.

That is, in FIG. 4 which is a longitudinal sectional view of a mounting portion of the shaft 16a, the shaft 16a is screwed to an inner ring receiver 18 fixed to the upper surface of the spur gear 13a, and is loosely fitted to the shaft 16a. The inner ring 19a of the bearing 19 is held between the upper holding plate 20 and the inner ring receiver 18, and the outer ring 19b of the bearing 19 is held between the swinging plate 14 and the lower holding plate 21.

In FIG. 5, which is a longitudinal sectional view of a mounting position of the shaft 16b, the shaft 16b is screwed to an inner race receiver 18 fixed to the upper surface of the spur gear 13b.
b, the inner ring 19a of the bearing 19 loosely fitted is clamped by the upper holding plate 20 and the inner ring receiver 18, and
Is arranged in a non-contact state with the inner peripheral wall formed by the rocking plate 14 and the regulating plate 22 (so that a constant gap is formed therebetween).

As shown in FIG. 3, the swing plate 14 has a circular hole 14a and a long hole 14b, and the lower holding plate 21 has a circular hole 14a. Each of the plates 22 is provided with a long hole 14b.

Therefore, the swing plate 14 can be swung in the horizontal direction. In this case, the shafts 16a, 16
Since the inner ring 19a of the bearing 19 loosely fitted to the shaft 16b is held between the upper holding plate 20 and the inner ring receiver 18, the shaft 16a,
The rotation of the bearing 16 is prevented, and the outer ring 19b of the bearing 19 loosely fitted on the shaft 16a comprises the swing plate 14 and the lower holding plate 2.
1, the vertical movement of the rocking plate 14 is restricted.

The bearing 19 loosely fitted on the shaft 16b.
Is arranged in a non-contact state with the inner peripheral wall formed by the rocking plate 14 and the regulating plate 22 (so as to form a constant gap therebetween), so that the rocking plate 14 It can be prevented from moving up and down excessively (more than specified),
Since the long hole 14b is provided in the swinging plate 14 and the regulating plate 22, even if the one spur gear 13a and the other 13b are assembled in a state where the phases are different, the shafts 16a, 16b can be absorbed.

The spur gear 13a is rotatably mounted on a bracket 17a fixed to the table 8 of the lifting device 1, and the spur gear 13b is fixed to the table 8 of the lifting device 1. The bracket 17b is mounted so as to be rotatable.

The lower holding plate 21 and the regulating plate 22 are attached to the lower surface of the swing plate 14 by bolts 23, and the shafts 16a and 16b are fixed to the shaft centers C1 and C2 of the spur gears 13a and 13b. It is mounted eccentrically.

A winding guide 6 is attached to the other end (the right end in FIG. 3) of the swing plate 14 (see FIG. 2). The winding guide 6 passes through a guide hole 25 through which the cleaning member 24 passes, and the winding reel 4 is mounted on an output shaft of a driving device 26, and the driving device 26 is It is fixed to a bracket 27 fixed to the table 8.

The guide roller 5 is mounted so that it can rotate freely, and the supply reel 3 is provided with a brake (not shown). It is attached so that it can be done.

For this reason, the take-up reel 4 is driven by the driving device 26.
The cleaning member 24 (for example, a synthetic resin thread) wound around the supply reel 3 by driving the
The cleaning member 24 is guided by the guide roller 5, and then is wound through the guide hole 25 of the winding guide 6.

The driving device 11 controls the spur gear 13
The swinging plate 1 is rotated by driving the spur gear 12 in which the gears a and 13b mesh with each other in the direction shown by the arrow (counterclockwise).
4 is swung in the horizontal direction so as to go around the winding guide 6 around the nozzle 28 to which the viscous discharge material is attached at the front end (lower end), that is, draw a locus A indicated by a chain line. The winding guide 6 can be turned around.

Although the nozzle 28 is carried by hand,
At a work station (not shown), the viscous material is discharged and applied to the work, and when the application work is completed, the left end thereof is mounted on an apparatus frame (not shown) and is provided with a nozzle receiver arranged at a predetermined level. It is inserted and supported in the cutout recess 30 of 29 (see FIG. 2).

On the other hand, in the elevating device 1, a table 8 is mounted on the tip (upper end) of a piston rod of a cylinder 31 mounted on a base fixed on the floor. For that reason,
By controlling the protrusion of the piston rod of the cylinder 31, the winding device 2 can be moved up and down.

Therefore, when removing the viscous discharge adhered to the nozzle 28 supported by the nozzle receiver 29, the winding device 2 that has been moved to the lower retracted position is moved upward by the lifting device 1, As shown in FIG. 1, the winding guide 6 is positioned at the tip of the nozzle 28.

Then, the spur gear 12 is driven and rotated by the driving device 11, and based on this, the swinging plate 14 is swung in the horizontal direction, and the winding guide 6 is moved to the nozzle 28.
Is turned against. At this time, the winding guide 6 rotates while being gradually moved downward, which is performed by control of moving the winding device 2 downward by the lifting device 1.

Further, while the winding guide 6 is rotating with respect to the nozzle 28, the take-up reel 4 is stopped rotating, but the cleaning member 24 is pulled by the winding guide 6 and the supply reel 3 is rotated.

For this reason, as shown in FIG. 6, the cleaning member 24 can be wound around the nozzle 28 to which the viscous discharge material 35 is attached in a tensioned state. , 8, the cleaning member 24 wound around the nozzle 28 is moved downward.

This is also performed by the control of moving the winding device 2 downward by the lifting device 1, and the cleaning member 24 is moved downward and the nozzle 28 is moved downward as shown in FIG. From the tip (nozzle opening end).

For this reason, the viscous ejected material 35 attached to the nozzle 28 is removed by the cleaning member 24, that is, the viscous ejected material 35 attached to the outer peripheral surface of the nozzle 28 except the tip end surface (nozzle opening surface) is removed. The thick discharge 35 can be almost completely removed.

Hereinafter, the cleaning member 2 is moved from the nozzle 28 to the cleaning member 2.
When the roller 4 is separated, the take-up reel 4 is driven to rotate by the driving device 26, and therefore, as shown in FIG. 10, the cleaning member 24 is pulled and linearized.

During the time when the cleaning member 24 is changed from the state shown in FIG. 9 to the state shown in FIG. 10, the upper surface of the cleaning member 24 adheres to the tip end surface (nozzle opening surface) of the nozzle 28. The viscous ejection material 35 that has been squeezed can be removed by pressing.

Then, the cleaning member 24 that has been made linear is further wound up by a predetermined length.
This condition is shown in FIG.
Since the viscous discharge material 35 that has been removed by wiping is attached to the cleaning member 24, it is transferred to the take-up reel 4 together with the cleaning member 24.

At this time, the viscous ejected material 35 which has been removed from the outer peripheral surface of the nozzle 28 except for the tip end surface (nozzle opening surface).
Is attached to the lower surface side of the cleaning member 24,
Even when the nozzle 28 and the cleaning member 24 are close to each other, the nozzle 28 is prevented from adhering again to the nozzle 28 and is removed from the tip end surface (nozzle opening surface) of the nozzle 28 adhering to the upper surface side of the cleaning member 24. Since the viscous ejection material 35 removed by debris is a small amount, the cleaning member 20 is removed.
Transported with

Further, as shown in FIG. 11, a predetermined length of the cleaning member 24 to which the viscous discharge material 35 removed from the nozzle 28 is adhered is taken up by the take-up reel 4. In performing the next cleaning, a clean portion of the cleaning member 24, that is, a portion to which the viscous discharge material 35 is not adhered can be wound around the nozzle 28 and always sufficiently cleaned (squeezed and removed). Therefore, by virtue of such a synergistic effect, the viscous discharge material 35 attached to the tip portion of the nozzle 28 (the tip surface and the outer peripheral surface of the nozzle) can be quickly and almost completely removed. Can be.

While the embodiment of the present invention has been described above, in the present invention, the relative movement between the cleaning member 24 wound around the nozzle 28 and the nozzle 28 is separated from each other. Is not limited to moving the cleaning member 24 with respect to the nozzle 28 on the fixed side.
As shown in FIGS. 12 to 18, the nozzle 28 may be moved with respect to the cleaning member 24 on the fixed side.
4 and the nozzle 28) may be moved.

The cleaning member 24 is connected to the nozzle 28
The nozzle 28 is rotated while gradually moving the winding guide 6 downward in order to bring the nozzle into close contact with the cleaning member 24. However, depending on the selection of the cleaning member 24 (for example, a cleaning member having a cross section close to a circle is selected). In this case, it is not necessary to move it downward because it can be brought into close contact even if it is wound at the same height.

The cleaning member 24 includes the nozzle 2
The nozzle 2 has a predetermined strength so that the viscous discharge material 35 attached to the nozzle 8 can be squeezed and removed.
Any material may be used as long as it can be in close contact with 8, but in general, it is selected from wire, string, and tape as needed, and the thickness of the ladder is removed during removal. The thickness is selected to such an extent that the removed viscous ejection material 35 can be prevented from climbing over the cleaning member 24 and reattaching to the cleaned portion.

The material is also made of natural fiber,
It may be made of natural rubber, synthetic resin, metal or the like, and has heat resistance corresponding to the characteristics of the viscous discharge material 31,
Those having predetermined characteristics such as chemical resistance are appropriately selected. The term “wire” refers to a concept that includes a thread and a wire.

The cleaning member 24 can be cleaned (squeezed and removed) even if the cleaning member 24 is wound around the nozzle 28 less than once, but the effect is greater as the number of windings is larger. However, when the number of windings increases, separation from the nozzle 28 generally becomes troublesome, and thus a predetermined number is selected as necessary.

The tension of the wound cleaning member 24 may be applied to such an extent that the viscous discharge material 35 attached to the nozzle 28 can be squeezed and removed.
When the cleaning member 24 and the nozzle 28 wound around the nozzle 28 are separated from each other, a tension is applied to the cleaning member 24 so that the cleaning member 24 can be separated while being kept in close contact with the outer peripheral surface (excluding the nozzle opening surface) of the nozzle 28 without being loosened. Is preferred.

Before the cleaning member 24 wound around the nozzle 28 is separated from the nozzle 28, the cleaning member 24 may be pulled and moved in one direction or in multiple directions as it is wound. 2
The viscous ejection material 35 attached to 8 can be more effectively removed by squeezing.

Further, the cleaning member 24 separated from the nozzle 28 can remove the viscous discharge material 35 attached to the tip end surface (nozzle opening surface) of the nozzle 28 by the upper surface thereof by pressing it. It is preferable to move in one direction or in various directions. In addition, it is preferable to change the positions one after another so that cleaning (ironing and removal) can be always performed at a clean part. As described above, by always performing cleaning (filtration and removal) at a clean place, it is possible to prevent the cleaning effect from lowering.

The nozzle 28 may have any shape, such as a circle, as long as a step portion or the like where it is difficult to separate the wound cleaning member 24 is not formed at a portion to be cleaned (squeezed and removed). It may be something.

When the tip is provided in a conical shape, the cleaning member 24 slides on the tip side of the nozzle 28 and it is difficult to apply tension. The tension may be applied while pulling in the direction opposite to the nozzle tip.

Depending on the size of the taper of the cone and the level of the viscosity of the viscous discharge material 35, the tension may be applied only to the wound cleaning member 24, that is, the relative movement may not be forcibly performed. In some cases, the cleaning member 24 and the nozzle 28 may be separated from each other by the relative movement between the cleaning member 24 and the nozzle 28 in the present invention. And remove it.

A specific example of the nozzle 28 is a needle having a gauge number of 17G having an outer diameter of 1.5 mm. For such a nozzle 28, a No. 2 nylon fishing line having an outer diameter of 0.235 mm is used. May be used.

The viscous ejection material 35 may have any properties such as normal temperature and heated. When the viscous ejection material 35 contains a solvent or the like, the solvent adhering to the nozzle 28 evaporates, and the viscosity is further increased to make cleaning (squeezing and removing) difficult. A solvent suitable for lowering the temperature is applied to one or both of the cleaning member 24 and the nozzle 28, or the nozzle 28 is immersed in the solvent to facilitate cleaning (swiping and removing). Can be.

In the case of the heated viscous discharge material 35, the cleaning member 24 wound around the nozzle 28 is waited until the cleaning member 24 is heated to a predetermined temperature, and is cleaned (squeezed and removed). 24 may be heated to a predetermined value.

Further, regarding the supply reel 3, the brake mounted on the supply reel 3 can be appropriately selected from those utilizing friction, magnetic force, motor torque, and the like. When the cleaning member 24 wound around the nozzle 28 and the nozzle 28 are separated from each other by mounting a torque motor, the cleaning member 24 may be wound around the supply reel 3.

The guide moving means 7 is not limited to the above-mentioned rocking plate type, but may be other types, for example, a cam type or a link type. And the fact that the nozzle 28 is inserted and supported in the cutout recess 30 of the nozzle receiver 29 is detected by an appropriate detection such as an optical type, a capacitance type, a magnetic type, or an ultrasonic type. Alternatively, it may be detected and activated by means.

Further, when the nozzle 28 is moved, the nozzle 28 may be moved by a robot, and the guide hole 25 of the winding guide 6 is provided in a predetermined shape corresponding to the sectional shape of the cleaning member 24.

The lifting device 1 is provided so that the winding device 2 can be moved up and down.
May be further mounted so as to be able to move in the XY axis direction or the XYθ axis direction. By mounting in this manner, the plurality of nozzles 28 supported by the nozzle receiver 29 can be successively and continuously cleaned (squeezed and removed).

[0059]

As described above, according to the present invention, the viscous discharge adhering to the tip portion of the nozzle (the tip surface and outer peripheral surface of the nozzle) can be quickly and almost completely removed. In addition, at that time, the removed viscous discharge can be prevented from adhering to the nozzle again, and the cleaning member can always be cleaned (squeezed and removed) at a clean portion of the cleaning member.

[Brief description of the drawings]

FIG. 1 is a front view of a nozzle cleaning device.

FIG. 2 is a plan view of FIG.

FIG. 3 is a plan view showing a mounting mode of a swing plate.

FIG. 4 is a longitudinal sectional view of a mounting position of one shaft 16a shown in FIG.

5 is a longitudinal sectional view of a mounting position of the other shaft 16b shown in FIG.

FIG. 6 is a view showing a state in which a cleaning member is wound around a nozzle.

FIG. 7 is a view showing a state where the cleaning member wound around the nozzle is slightly moved downward from the state of FIG. 6;

FIG. 8 is a view showing a state where the cleaning member wound around the nozzle is further moved downward from the state of FIG. 7;

9 is a diagram illustrating a state in which the cleaning member wound around the nozzle is further moved downward from the state of FIG. 8 to separate the cleaning member from the nozzle.

10 is a diagram illustrating a state in which the cleaning member is pulled from the state of FIG. 9 into a linear state and moved in the direction of the arrow.

11 is a view showing a state in which a cleaning member is moved by a predetermined distance from the state of FIG. 10 and a clean portion is positioned below a nozzle;

FIG. 12 is a view showing a state where a cleaning member is wound around a nozzle.

13 is a view showing a state where the nozzle is slightly moved upward from the state of FIG. 12;

FIG. 14 is a view showing a state where the nozzle is further moved upward from the state of FIG. 13;

FIG. 15 is a view showing a state where the cleaning member is separated from the nozzle from the state of FIG. 14;

FIG. 16 is a view showing a state where the cleaning member is pulled from the state of FIG. 15 to be in a linear state.

17 is a view showing a state in which the nozzle is moved upward from the state of FIG. 16 and the cleaning member is moved in the direction of the arrow.

18 is a view showing a state in which a cleaning member is moved by a predetermined distance from the state of FIG. 17 and a clean portion is positioned below a nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elevating device 2 Winding device 3 Supply reel 4 Take-up reel 6 Winding guide 7 Guide moving means 12 Spur gear 13a, 13b Spur gear 14 Oscillating plates 16a, 16b Shaft 18 Inner ring receiver 19 Ball bearing 20 Upper holding plate 21 Lower holding plate Plate 22 Regulator plate 24 Cleaning member 25 Guide hole 28 Nozzle 29 Nozzle receiver 35 Viscous discharge

Claims (6)

[Claims] 1. A cleaning member is wound around a nozzle to which a viscous discharge material is attached in a tensioned state, and then the cleaning member and the nozzle are separated from each other by a relative movement between the cleaning member and the nozzle. A nozzle cleaning method characterized in that a viscous discharge is squeezed and removed. 2. The method according to claim 1, wherein the relative movement between the cleaning member wound around the nozzle and the nozzle for separating the nozzle from each other is performed so as to move the cleaning member relative to the nozzle on the fixed side. Item 1
3. The nozzle cleaning method according to item 1. 3. The nozzle cleaning method according to claim 1, wherein the cleaning member is made of one of a wire, a cord, and a tape. 4. A nozzle comprising: a winding device for winding a cleaning member around a nozzle to which a viscous discharge material is attached, in a tensioned state; and an elevating device for moving the winding device up and down. Cleaning device. 5. A winding device, comprising: a supply reel for supplying a cleaning member; a winding reel for winding the cleaning member; a winding guide for supporting the cleaning member between the supply reel and the winding reel; 5. A guide moving means for rotating the winding guide with respect to the nozzle.
A nozzle cleaning device according to item 1. 6. The nozzle cleaning device according to claim 4, wherein the cleaning member is formed of any one of a wire, a cord, and a tape.