JP2001321705A - Method and apparatus for quantitative application - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose an applicator which applies a coating agent thinly, uniformly, and accurately, is small in size and light in weight, and can be fitted simply to a small-size robot, etc., to be moved, and provide a new method using the applicator. SOLUTION: A moving frame 6 which is reciprocated transversely by a cylinder 3 is installed in a device housing with its bottom part opened to stretch a film 19 subjected to application hole processing, and a rotary shaft 10 which is inverted at an rotational angle of about 90 deg. by another cylinder at the advance and retreat ends is fitted horizontally to the moving frame. The applicator comprises elastic plates which cross each other at right angles to the rotary shaft. Alternatively, application plates 11, 12 which support a tip member by elastic bodies are fixed, and the coating agent on the bottom part film is applied on a substrate under the film while it is scraped by the application plate on the outside in the advance direction in accordance with the reciprocation of the moving frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a thermosetting adhesive,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for quantitatively and uniformly applying a UV curable adhesive, an oil adhesive, a screen printing ink, a creamy solder, a grease, a dye, a paint, a food to be coated, and other coating agents.

[0002]

2. Description of the Related Art As products have become lighter, thinner, smaller and have higher quality,
Adhesives and other viscous agents are required to be applied thinly and uniformly without protruding onto the object to be applied, control of the viscosity and amount of applied agent, prevention of drying of the applied agent, various types of products There is a need for further improvements, such as measures to deal with such problems.

Conventionally, as a method of mechanically applying a coating agent, there are a dispenser system and a screen printing system. The dispenser method applies internal pressure to the coating agent in a syringe-shaped cartridge with a piston,
This is a method in which the ink is ejected from an ejection nozzle and applied in a line shape or a plane shape having a certain width.

[0004] However, this method cannot apply thin and uniform coating on a wide surface, and there is a problem that the coating amount becomes non-uniform especially at the time of initial contact and at the time of temporary stop at the final time.

[0005] The screen printing method includes two resilient coating plates (squeegees) which move up and down and move horizontally, respectively, and supplies a coating material onto a perforated resin film or thin plate. Is moved laterally while the coated plate is in contact with the film surface to perform coating and scraping back of the coating agent.

However, although this method can provide a uniform coating surface, the movement is complicated, and a vertical movement mechanism is required. It is also difficult to automatically replenish the coating agent into the appropriate drive mechanism. For example, the fact is that the coating agent is replenished while being moved between two coating plates that the operator moves up and down, and the coating surface is exposed to the outside. As a result, the coating agent easily dries and dust easily adheres to the coating plate, and the coating plate and the film surface need to be cleaned frequently.

[0007]

SUMMARY OF THE INVENTION The present invention proposes a small and lightweight coating apparatus for applying a coating agent thinly and uniformly with high precision, which can be easily mounted on a small robot or the like and moved, and a novel coating method therefor. The entire application mechanism is sealed to prevent early drying and dust intrusion.Also, automatic quantitative replenishment of the coating material is possible, and the entire amount of the coating material supplied on the coating surface is always used for coating. It is designed to move laterally on the application surface.

[0008]

That is, in the present invention, a moving frame which reciprocates and reciprocates by cylinder driving is provided in a casing having an open bottom in order to stretch a coating film having a coating hole formed thereon. At the forward and backward ends of the moving frame, there are horizontally mounted rotating shafts which are rotated at an angle of about 90 degrees by other cylinders, and the rotating shafts are formed of elastic plates so as to be perpendicular to each other, or Two reciprocating motions of the moving frame in which two coating plates each having a tip member supported by an elastic body are fixed, and the coating material on the bottom coating film supplied in front of the casing is driven by a cylinder for moving back and forth. The present invention relates to a quantitative application method and an apparatus for applying the composition to an object to be coated under a film while being scraped by a coating plate on the outer side in the traveling direction.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory perspective view showing an example of an internal mechanism of the apparatus of the present invention. Reference numeral 1 denotes an entire rectangular box-shaped casing having an open bottom, and one of front and rear side plates thereof. A cylinder 3 for horizontal movement is provided above the housing 1 (rear plate in the figure).
At the tip of the rod 4 of the cylinder 3, two parallel guide rods 5 horizontally supported and fixed in the front-rear direction above the inside of the casing 1 are supported by being inserted in the front-rear direction. A movable moving frame 6 is attached, and the moving frame 6 moves forward and backward by driving the cylinder 3.

[0010] The two guide rods 5 are mounted on the housing 1.
May be fixed so as to extend over the entire length between the front and rear side plates 2 and 7. However, in the present embodiment, since the automatic coating material supply device A is installed on the casing 1 which is brought closer to the front side plate 7, It is arranged to be slightly closer to the rear plate 2 side than the position of the supply device A and to be inserted between the rear plate 2 and the support plate 9 vertically fixed to the top plate 8 of the housing 1.

The moving frame 6 has a substantially U-shaped front surface and a substantially L-shaped side surface, and a rotating shaft 10 extends between protruding ends of the lower end projecting forward. Moving frame 6
The rotating shaft 10 is made of an elastic plate such as a rubber plate, or two rectangular first and second rectangular members each having a metal or plastic tip member supported by an elastic body such as rubber or a compression coil spring. The painted plates (squeegees) 11 and 12 are fixed at right angles to each other, and both painted plates 11 and 12 have a width substantially equal to the width in the casing 1, and the leading edge thereof is rotated by the rotation of the rotating shaft 10. It has a length such that it slightly protrudes from the open bottom surface of the housing 1 when facing directly below.

Reference numeral 13 denotes a rotating cylinder fixedly mounted on the center of the upper rear surface of the moving frame 6 for driving the rotating shaft 10 to rotate.
A base mechanism is fixed to an intermediate portion of the crankshaft and connected to a swiveling lever 15 projecting at right angles from the shaft 10 to constitute a crank mechanism that can rotate the rotating shaft 10 through the lever 15 at a substantially rotation angle of 90 °. I have.

As a connecting means for connecting the tip of the cylinder rod 14 and the lever 15, the two rotating levers 15 of the same shape facing each other and having a long groove 16 formed in the direction of the rotating shaft 10 slide in the long groove 16 as shown in the figure. Horizontal pin 17 that fits freely
In addition to attaching the pinion gear to the tip of the rod 14, the pinion gear is fixed to the outer periphery of the intermediate portion of the rotating shaft 10 without using the turning lever 15, and the rack rod is attached to the rod 14,
The rack teeth of the rack rod and the pinion gear mesh with each other, or the rotary shaft 10 is connected to a drive shaft of a rotary cylinder which is inverted by switching air to directly rotate the rotary shaft 10 by about 90 °. You can also.

The rod 14 of the rotating cylinder 13
Is located at the extension end, the first painted plate 11 faces directly below, and the second painted plate 12 faces both horizontally so as to face rearward.
12 is fixedly mounted on the rotating shaft 10.

The stroke length of the rod 4 of the lateral movement cylinder 3 mounted on the outer surface of the rear plate 2 of the housing 1 does not extend over the entire length between the inner surfaces of the front and rear side plates 2 and 7 of the housing 1 but is made of an elastic plate. The first coating plate 11 is the rotation cylinder 13
The extended end is a position where the leading edge presses against the inner wall surface of the front side plate 7 when the rod 14 becomes horizontal by the retraction of the rod 14, and the second coating plate 12 is the rod 1 of the rotating cylinder.
The position at which the leading edge touches the inner wall surface of the rear side plate 2 when it becomes horizontal due to the extension of the retracted end 4 is the retracted end.

When the rod 4 of the moving cylinder 3 is at the retracted end, the rear end of the rotating cylinder 13 projects more rearward than when the other coating plate 12 has turned to the horizontal position. The rotation cylinder 1
3 has a bottomed relief hole 18 into which the rear end can enter.

The lower portions of the inner surfaces of the front and rear side plates 2 and 7 are the first
And the R surfaces 2a, 7a substantially following the rotation locus of the second painted plate 12 or 11. That is, when the first coating plate 11 turns downward by 90 ° from the horizontal position by the rotation of the rotating shaft 10 at the forward end of the moving frame 6, the leading edge of the first coating plate 11 rubs the R surface 7 a of the front side plate 7. At the backward end of the moving frame 6
Similarly, when the base 2 turns downward by 90 ° from the horizontal position, the leading edge of the coating plate 12 rubs the R surface 2 a of the rear side plate 2.

Reference numeral 19 denotes a coating film (mold film) such as a thin stainless steel plate or a resin film having a thickness of 0.1 to 0.3 mm, which is stretched on the open surface at the bottom of the housing 1, and has a laser cut or an etching at the center thereof. By processing, one or a plurality of coating holes are formed in accordance with the shape of the coating surface. The film 19 is clamped and fixed at both front and rear ends (or front and rear and left and right ends) by a stopper plate 20 which is detachably attached to the lower outer surface of the front and rear side plates 2 and 7, and is tensioned to the bottom open surface of the casing 1. It can be stretched.

The above-mentioned automatic coating material supply device A is provided in front of the moving frame 6 in the traveling direction, that is, near the end of the housing 1 on the front side plate 7 side. That is, reference numeral 21 denotes an application agent container with an upper lid 22 attached on the top plate 8 of the casing 1 which is moved to the front side plate 7 side, and a central portion of the top plate 8 constituting a bottom plate portion of the container 21 A long groove-shaped coating material supply port 23 is opened, and the coating material 29 in the container 21 can be supplied into the casing 1 through the supply port 23.

Reference numeral 24 denotes a plate-shaped slide shutter capable of sliding horizontally on the lower surface of the bottom plate portion of the container 21. The shutter 24 has a cutout 2 formed in the middle of the upper edge of the front plate 7.
A mounting plate 26 is slidably fitted in the shutter 5 and an end protruding forward from the housing 1 of the shutter 24 is integrally suspended therefrom. The shutter driving cylinder 27 is attached toward
Of the rod 28 is fixed to the upper part of the front side plate 7.

As a result, when the cylinder rod 28 is extended, the shutter 24 is drawn out of the housing 1 (outside of the front side plate 7) to open the coating material supply port 23, and the rod 28 When retracted, the supply port 23 is closed by pulling the cylinder 27 toward the front side plate 7 and retracting the shutter 24 into the housing 1.

In order to apply the coating agent 29 to a predetermined location on the surface of the workpiece 31 placed on the predetermined mounting table 30,
Perform as follows. First, a coating film 19 is stretched on an open surface at the bottom of the casing 1 and both front and rear ends (or four sides) thereof are fixed to the casing 1 by stopper plates 20, and the film 19 is positioned with respect to the surface of the object 31 to be coated. Make contact and make contact.

The coating material 29 supplied from the supply device A to the front end portion inside the casing 1 is reciprocated by the moving cylinder 6 by the moving cylinder 3 and rotated by 90 ° between the two coating plates by the rotating cylinder 13. Thus, application to the object 31 is performed.

That is, at the start of coating, the moving cylinder 3 moves forward, and the moving frame 6 is at the forward end. At this time, the rotating cylinder 13 moves backward, so that the rod 14 is at the retracted end. The painted plate 11 becomes horizontal toward the front, and its leading edge presses against the inner wall surface of the front plate 7 in front, while the second painted plate 12 faces directly downward, and its leading edge presses against the upper surface of the film 19 ( (See FIG. 3).

Therefore, first, the rotating cylinder 13 is operated to extend the rod 14 thereof, and the rotating shaft 10 is rotated via the swiveling lever 15 so that the horizontal first coating plate 11 is rotated.
Is turned downward by 90 ° at that position, thereby
The coating agent 29 accumulated at the inner front end is scraped (see FIG. 4).

At this time, since the lower corner in the front side plate 7 is formed on the R surface 7a substantially following the downward turning locus of the coating plate 11, the coating material 29 accumulated on the R surface 7a Since the leading edge of the first coating plate 11 moves downward while rubbing the R surface 7a, it is brought closer. The first painted plate 1
When 1 turns downward from the horizontal position to point directly below, the coaxial second coating plate 12 that has pointed directly below also simultaneously turns rearward and upward to the horizontal position.

Next, the moving cylinder 3 starts returning,
The moving frame 6 is horizontally moved rearward with the first coating plate 11 facing directly below. Thereby, the first coated plate 1
1 is applied to the upper surface of the object 31 through the film hole 19a because the leading edge of the first coating plate 11 moves backward while being pressed against the upper surface of the film 19 (see FIG. 1). 4).

When the moving frame 6 reaches the rearward end, the horizontal leading edge of the second coating plate 12 comes into pressure contact with the inner wall surface of the rear side plate 2, and the rotation cylinder 13 moves backward at that position. By retracting the rod 14, the rotating shaft 10 is turned 90 ° reversely via the turning lever 15. As a result, the second coating plate 12 turns downward while rubbing the R surface 2a at the lower portion of the inner wall surface of the rear plate 2 until it faces directly below, and scrapes the remaining coating material 29 (see FIG. 5).

When the moving frame 6 reaches the rearward end, the rear end of the rotating cylinder 13 is inserted into the escape hole 1 of the rear side plate 2.
There is no problem because it escapes inside 8.

Also, while the moving frame 6 moves backward,
When the slide shutter 24 slides forward by the operation of the cylinder 27, the supply port 23 is opened and a predetermined amount of the coating material 29 is supplied from the front coating material supply device A to the front inside the housing 1 (FIG. 5). reference). The supply of the coating agent 29 can be set to be performed every time the moving frame 6 moves backward or when the moving frame 6 moves backward a predetermined number of times.

When the second coating plate 12 completes the downward turning at the rearward end of the moving frame 6 as described above, the moving cylinder 3 starts to move forward again, and the moving frame 6 is moved forward. The second coating plate 12 moves forward with its leading edge pressed against the upper surface of the film 19, and the coating material 29 raked from the coating plate 12 is again applied to the object 31 through the film hole 19 a. To the original position (see FIG. 3).
9 is supplied with the next object to be coated 31 or the casing 1
By moving itself, it arrives at the next workpiece to be coated, and the same operation as described above is repeated again.

In the above description, an example in which the coating material 29 is applied twice to the object 31 by one reciprocating movement of the moving frame 6 has been described. May be performed only once, and the coating may be applied to the next object to be coated, or a single object may be subjected to multiple reciprocations of the moving frame 6 a plurality of times.

FIGS. 6 and 7 are a sectional side view and a sectional front view of a main part showing another example of the apparatus according to the present invention. In FIG. 6 and FIG. The rodless cylinder 32 is mounted in the housing 1 to move the moving frame 6 back and forth.

The above-mentioned moving cylinder 3 has a stroke length required for reciprocating movement of the moving frame 6 by the side plate 2 of the casing 1.
It will protrude out and take up that much space. Therefore, if a cylinder for driving the moving frame 6 is installed in the housing 1, the entire apparatus becomes more compact, so the rodless cylinder 32 is used.

The rodless cylinder is a cylinder having no piston rod, in which a magnet is mounted on a piston inside the cylinder and a movable body of a magnetic body or a movable body with a magnet is slidably movable outside the cylinder. And a type in which a long groove corresponding to the stroke length is formed in the cylinder wall, and a moving piece that reciprocates integrally with the internal piston projects from the long groove.

FIGS. 6 and 7 show an example in which the former magnet type rodless cylinder is used. A side-face downward U-shaped mounting plate 33 mounted on the lower surface of the top plate 8 of the casing 1 is shown in FIGS. A rodless cylinder 32 parallel to the moving direction of the moving frame 6 is mounted, and two guide rods 5 are inserted on both sides thereof. The upper part of the moving frame 6 is inserted and supported by the rodless cylinder 32 and the two guide rods 5 so as to be movable back and forth. An internal magnet (permanent magnet) 34 attached to the piston 35 and an external magnet (or magnetic material) 36 that attracts each other are attached. The external magnet 36 follows the movement of the internal magnet 34 integrated with the piston 35. Thus, the moving frame 6 reciprocates.

The reciprocating movement of the moving frame 6 and the application of the coating agent 29 to the object 31 and the supply of the coating agent 29 into the housing 1 by the two coating plates 11 and 12 are the same as described above.
The description is omitted. Further, it goes without saying that the above-mentioned projecting moving piece type may be used instead of the magnet type as the rodless cylinder.

FIG. 8 is an example of an external view of an apparatus according to the present invention, in which a piston rod 4 having a horizontally moving cylinder 3 mounted on the outside of the rear side plate 2 described above is shown. Reference numeral 37 in FIG. 8 denotes a chuck grip portion provided on the top plate 8 of the housing 1 so that the chuck at the tip of the moving arm of the small robot (not shown) moves the housing 1 to an arbitrary position. Is a chuck guide of the present invention. For example, a plurality of coating apparatuses of the present invention having different coating patterns are arranged in advance, and a single small robot sequentially grasps the coating apparatuses of the present invention and places them at different locations. The application of the shape can be performed in the same step.

[0039]

The present invention is configured as described above, and has the following effects. (1) The coating agent can be thinly and uniformly applied to the application surface with high precision. (2) Since the entire application mechanism is hermetically housed in the casing, it is not affected by the indoor atmosphere, there is no dust or the like from the outside, and the coating material can be prevented from drying out early. In addition, since it is a sealed structure, if a heater is installed in the housing, it is possible to apply while softening grease etc., and furthermore, by applying an anti-drying agent or an inert gas into the housing, the coating can be performed. Drying and oxidation of the agent can be prevented. (3) Since the coating plate moves while constantly sweeping the entire amount of the coating material supplied into the casing, the coating is performed, so that there is no waste of the coating material. (4) Since an automatic supply device for the coating agent is provided, the coating agent can be supplied in a fixed amount into the casing, making it possible to completely automate the coating.Moreover, this device does not have a vertical movement mechanism, and the entire device is compact. As a result, the device can be reduced in weight and size, and can be easily incorporated into an automatic line. (5) Since the device of the present invention is small and lightweight and easy to disassemble,
By removing the casing, the internal mechanism can be easily cleaned.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an internal mechanism of a fixed quantity coating device according to the present invention.

FIG. 2 is an explanatory side view of the apparatus shown in FIG. 1;

FIG. 3 is an explanatory side view showing one process of a coating method according to the present invention.

FIG. 4 is an explanatory side view showing one process of a coating method according to the present invention.

FIG. 5 is an explanatory side view showing one process of a coating method according to the present invention.

FIG. 6 is an explanatory side view showing another example of the coating apparatus according to the present invention using a rodless cylinder.

FIG. 7 is an explanatory front view of the same.

FIG. 8 is an external view showing an example of a constant-rate coating apparatus according to the present invention.

[Explanation of symbols]

 Reference Signs List 1-casing 2-rear plate 3-moving cylinder 4-rod 5-guide rod 6-moving frame 7-front plate 8-top plate 9-support plate 11-first coating plate 12-second coating plate 13- Cylinder for rotation 14-Rod 15-Swivel lever 16-Long groove 17-Horizontal pin 18-Relief hole 19-Coating film 20-Stop plate 21-Coating agent container 22-Top lid 23-Coating agent supply port 24-Slide shutter 25- Notch 26-Mounting plate 27-Cylinder 28-Rod 29-Applicant 30-Substrate to be coated 31-Substrate to be coated 32-Rodless cylinder 33-Mounting plate 34-Magnet 35-Piston 36-Magnet 37-Chuck grip Part 38-Chuck guide A-Automatic coating material supply device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B41F 15/42 B41F 15/42

Claims (9)

[Claims] 1. A moving frame which reciprocates and reciprocates by driving a cylinder is provided in a housing having an open bottom in order to stretch a coating film on which a coating hole has been formed. In the above, a rotating shaft which is inverted by a rotation angle of about 90 degrees by another cylinder is horizontally mounted, and the rotating shaft is provided with a tip member made of an elastic plate or supported by an elastic body so as to be perpendicular to each other. The two coating plates are fixed, and the coating material on the bottom coating film is applied to the object under the film while being raked by the coating plate on the outer side in the traveling direction in accordance with the reciprocation of the moving frame. A quantitative application method characterized by the following. 2. The lower corners of the front and rear walls in the traveling direction of the moving frame in the casing are formed on R surfaces each having a shape substantially following the downward turning locus of the painted plate, and are formed at the front and rear ends in the casing. 2. The quantitative coating method according to claim 1, wherein the accumulated coating agent is raked by pressing against the R surface of the coating plate and turning downward. 3. An automatic supply device for the coating agent is provided on the front upper side of the casing, and every time the moving frame in the casing moves backward, or when the moving frame moves backward a predetermined number of times, a predetermined amount of the coating material is supplied from the supply device. 3. The quantitative application method according to claim 1, wherein the application agent is supplied into the housing. 4. A horizontal moving cylinder is mounted on the upper side of the rear side of the rear side plate of the case having a rectangular box shape with an open bottom so as to stretch a coating film having a coating hole. At the rod end of the cylinder, a movable frame that is supported by being inserted and supported by two parallel guide rods that are horizontally supported and fixed in the front-rear direction above the casing and is movable in the front-rear direction is attached to the rod end of the cylinder. The lower end is provided with a rotating shaft that rotates at a rotation angle of approximately 90 degrees by driving a rotating cylinder fixed to the back of the frame, and the rotating shaft is a tip member made of an elastic plate or supported by an elastic body. Are fixed at right angles to each other, and when the rod of the rotating cylinder is at the extension end, the outer coating plate in the traveling direction is directed downward and the inner coating plate is moved rearward. Mounted so that it faces flat, the two coated plates have a width almost equal to the width of the inside of the case, and the front edge of the plate slightly protrudes from the open bottom surface of the case when facing directly below by the rotation of the rotating shaft. Characterized in that it has a length. 5. The moving cylinder according to claim 4, wherein a magnet-type rodless cylinder is used in place of the moving cylinder mounted outside and above the rear plate of the housing, and the rodless cylinder moves the moving frame into the housing. The upper part of the moving frame is inserted into and supported by the rodless cylinder and the guide rod, and is configured to be movable back and forth. An external magnet or a magnetic material is attached to the internal magnet mounted on the piston in the cylinder and attracts each other. The moving frame reciprocates following the movement of the internal magnet integrated with the piston of the rodless cylinder. Quantitative coating device. 6. The moving frame, wherein the movable frame has a substantially U-shaped front surface and a substantially L-shaped side surface, and the rotating shaft is inserted between projecting ends of the lower end projecting forward. The quantitative application device according to the above. 7. The reversing drive of the rotating shaft provided with a coating plate by the rotating cylinder attached to a moving frame, the rod tip of the rotating cylinder is fixed at a base portion to a middle portion of the rotating shaft, and a right angle is formed from the shaft. 7. The constant-quantity coating apparatus according to claim 4, wherein the application is performed by a crank mechanism connected to a turning lever protruding in the direction. . 8. The reversing drive of the rotating shaft with a coating plate by the rotating cylinder mounted on a moving frame fixes a pinion gear on the outer periphery of an intermediate portion of the rotating shaft, while a rod of the rotating cylinder has 5. The method according to claim 4, wherein a rack rod is mounted and the rack teeth of the rack rod mesh with the pinion gears, or the rotary shaft is directly connected to a drive shaft of a rotary cylinder which is inverted by switching air. 7. The quantitative coating device according to 5 or 6. 9. A coating material container is mounted on a front upper surface of a top plate forming the casing, and a long groove-shaped coating material supply port is opened in a center portion of the top plate forming a bottom plate portion of the container. The coating agent in the container can be supplied to the inside of the container via the supply port, and a plate-shaped slide shutter slidable in the front-rear direction is provided on the lower surface of the bottom plate portion of the container. A fitting plate is slidably fitted in a notch formed in the middle of the upper edge of the front plate constituting the casing, and a mounting plate is integrally suspended from an end of the shutter protruding forward from the casing. 9. The device according to claim 4, wherein a shutter driving cylinder is mounted on an outer surface of the mounting plate toward the housing, and a rod end portion of the cylinder is fixed to an upper portion of the front plate of the housing. Metering applicator. .