JPS5996072A - Foreprocessing system in adhesive application process for panel - Google Patents

Abstract

PURPOSE:To economize in manhour by providing a panel-surface wiping process and a primer application process, as the foreprocessing in the adhesive application process for panels. CONSTITUTION:A window glass 1 supplied to the side shown by the arrow A from a window glass feeding part is loaded onto two plain shuttle bar 2 which extend in parallel and transferred successively in the direction of arrow B. Then, the window glass is transferred in the direction of arrow C through a wiping-out process F for removing the dirt and the fat on the glass surface and a pimer application process and sent into the succeeding adhesive application process. Thus, economization in manhour for panel preparation process is permitted by removing printing process.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pretreatment system for a panel adhesive application process.

Car window glasses are generally attached to the car body with adhesive. To explain this installation in more detail, in order to improve the appearance of the adhesive part of the window glass, a black printing print is applied to the outer periphery of the window glass in advance, and a primer (adhesive agent) and adhesive are applied to the outer periphery of the window glass. It was applied and attached to the car body.

However, this installation requires printing on the outer periphery of the window glass, which is expensive. In order to solve this problem, the applicant added a function to improve the appearance of the primer, that is, a function that makes it easy to apply a film with a uniform thickness around the outer periphery of the window glass, and also allows the parting line to appear clearly. We researched a method that allows it to be attached to the car body simply by applying primer and then applying a coat of paint. In the process of establishing this method, when applying the primer, it got dirty easily and l/
If fat deposits on your fingers, etc., increase in weight,
After the window glass is attached to the car body, the adhesive peels off and the window glass is not attached properly, or fingerprints, etc. become white and the assembly process is one of the cleanest in the car assembly process. However, when the window glass is being transported to the factory or stored, the window glass is touched by people, causing fat to adhere to it and dust to build up.

The present invention has been made based on the above-mentioned viewpoints, and its purpose is to establish a method that allows mounting on a vehicle body by simply applying a primer to a panel and then applying an adhesive. In addition, a wiping process for the panel surface and a primer coating process are provided as pretreatment processes in the panel adhesive application process, thereby omitting the conventional baking printing process, thereby reducing the manufacturing cost of the panel. The aim is to achieve automation of a series of tasks in the adhesive application process using industrial robots.

The present invention will be described in detail below based on embodiments shown in the accompanying drawings.

FIG. 1 shows an outline of the pretreatment process system in the adhesive application process for automobile window glass 1, and shows an arrow (
The window glass 1 supplied to the side (a) is placed on two plane shuttlepers 2 extending in parallel and sequentially moved in the direction of the arrow (b) to remove dirt and fat from the glass surface, a wiping process. After passing through F and primer coating step P, it moves in the direction of arrow C and is sent to the next adhesive coating step. Incidentally, in FIG. 1, the symbol (d) indicates the travel distance that the plane shuttleper 2 moves in the front and rear directions in one operation.

That is, as shown in FIG. 2, when the lifter 3 lifts up the window glass 1 placed on the plane shuttleper 2 to a predetermined pretreatment process position, the plane shuttleper 2 moves a distance (d) in the direction of the arrow (e). Just step back, place the next window glass and wait. After the pretreatment is completed and the window glass 1 is returned from the lifter 3 to the plane shuttleper 2, the plane shuttleper 2 is moved to the arrow (
The window glass 1 that has undergone the above pretreatment is moved forward by a distance (d) in the direction 1), and the window glass l that has been waiting is moved to the pretreatment process position.

FIG. 3 shows a system for the wiping process F, which is the pretreatment process, and a robot R having a multi-articulated robot arm Ra is installed in a work area near the lifter 3. A chip gripping hand is attached to the tip of the robot arm Ra. A chip supply device C is installed near the chip gripping hand H1 to supply a certain amount of wiping chips to the chip gripping hand H1 based on teaching information from the robot R. A storage tank 5 that supplies wiping agent to the robot R and a control device 6 that controls the operation of the chip gripping hand H1 are installed at the rear of the robot R. When the robot R is in operation, the window glass l is positioned at a predetermined height with its four corners suctioned and fixed by suction discs 4 provided on the lifter 3.

To explain this wiping process F in detail, the old chip gripping hand has a pneumatic cylinder 7 as a base member, as shown in FIG. A pneumatic cylinder 8 as an actuator is fixed to the tip of the piston rod 7a with a screw S, and the tip of the piston rod 10 of the pneumatic cylinder 8 is attached to the tip of the piston rod 7a as shown in FIG. As shown in FIG. 4, for example, a pair of clamp arms 12a and 12b as clamp members are connected via a link mechanism 11, and as shown by a solid line and a chain double-dashed line in FIG.
The movement of the piston rod 10 is actuated by the air supply from the air supply tube 14 communicating with the lower chamber 13 of the pneumatic cylinder 8 and the restoring force of the return spring 17 built into the chamber 16 having the atmosphere opening hole 15. The clamp arms 12a, 1'2b are opened and closed depending on the operation. Wide clamping pieces 18a and 18b for clamping the chip 37 are provided on the inner walls of the clamp arms 12a and 12b, respectively, by fixing them with bolts 19.

The inner walls of the clamping pieces 18a and 18b are formed in a concave and convex shape to increase the sliding resistance, and one of the clamping pieces 1
A puncture-up member 20 in the shape of an abbreviation is attached to the tip 8b, which serves as a sliding guide for the tip during wiping.

Incidentally, this backup member 20 is formed into a predetermined shape using an elastic pad or a dent. Further, several wiping agent supply tubes 21 are provided at the bottom of the pneumatic cylinder 8, and the tip of this wiping agent supply tube 21 is connected to the tip 3.
It is aimed at 7. In this embodiment, the tip of the wiping agent supply tube 21 is provided close to one of the clamp arms 12a so that the wiping agent is supplied to the sliding surface in front of the tip 37 in the sliding direction. The wiping agent may be directly impregnated into the tip 37 by arranging the portion so as to reach the backup portion side 20 or the tip 37.

The wiping agent supply tube 21 stores ethyl acetate, which is used as a wiping agent, through a control device 6 that incorporates a metering pump that pumps the wiping agent in a drip-like manner and at a constant rate. It is connected to tank 5. Further, an air discharge tube 23 is attached to the lower part of the pneumatic cylinder 8, and a discharge nozzle portion 24 formed at the tip of the air discharge tube 23 is connected to the clamping pieces 18a, 18.
The air discharged from the discharge nozzle portion 24 is the exhaust pressure air from the pneumatic cylinder 8. 5 and 6 (as shown, the air supply tube 14 and air discharge tube 23.!=tcm connected to the solenoid/help 25/bell 28. Controlled by switching.

Furthermore, the clamp arms 12a, 12b, the clamp arm 18
a, 18b and buffer pump member 20, horizontally penetrating holes 28a, 28b are perforated therein in a straight line, and one clamp arm 12a (till a control device 6 The tip of the γ ino < 28 is firmly inserted and the light for detecting the tip is 17 \.

This optical fiber 28
It is used as a light transmitting/receiving type sensor, and turns on when light transmission through the pores 28a and 28b is blocked.

In addition, the temple consisting of the above structure is
The mounting flange 30 of the pneumatic cylinder 7 is attached to the robot arm R.
It is assembled into the robot (R) by tightening the screw 31 on the side of the tip attachment part of (a). In response to a command signal from 6, the chip gripping/\\nd H1 is set to grip the chip and move the peripheral edge of the window glass 1 (1).

On the other hand, as shown in FIG.
The cotton fabric 35 as a chip material which has been rolled up between 4b and 4b is rolled up (after a certain amount has been rolled up, the air cylinder 1 is cut by the force acting from the 32nd tie 36), and cut at 36. The winding tfL of the cotton fabric 35 is performed by a motor 38 that rotationally drives one of the feed rollers 34, and the feed roller 3
4a.

The amount of winding up of the cotton cloth 35 is detected by photoelectric switches 39a and 39b provided at a predetermined position above the cotton cloth 34b. Note that the roll-shaped cotton cloth 35, cutter 36, motor 38, and photoelectric swing 39 are also connected to the foot roller 3.
Similar to 4, a support temple stand 33i is attached. code 4
0 is the discharge container for the 1-inch tube used at the same time. In this example, cotton cloth 35 is used as the punch line material.
This is because cotton cloth 35 has strong water absorbency and is fluffy (, X property. If it has this and the property of ]
Can be used. In addition, as a means for connecting the chimp 37, the force/punch 36 is used as described above. The cotton cloth 35 in a rolled or folded state is coated without %.

Pu 3? Perforations are made for each size of the chip, and the chip is gripped by the chip gripping hand H1 and then pulled and cut. Alternatively, the cotton cloth that has been cut to the size of the chip from the beginning is held by the chip gripping hand H1. Good too.

Next, a process of wiping an automobile window glass l using the apparatus according to the above embodiment will be explained.

First, as shown in FIG. 7, the robot R lowers the chip gripping hand H1 to a position near above the feed rollers 34a, 34b of the chip supply device C based on the teaching information. In this state, an arrival signal is sent from the robot R to the control device 6, and the motor 38 is driven to rotate the feed rollers 34a, 34b and wind up the cotton cloth 35. Then, when the cotton cloth 35 has been rolled up a certain amount, a photoelectric switch 38a stops the passage of the cotton cloth 35.

311b detects it, and the rotation of the motor 38 is stopped based on the detection signal. Next, as shown in FIG. 5, the lenoid valve 25 is actuated to close one valve 28 and supply air at a predetermined pressure into the valve 13 with a 70-ton air pump. . Then, the piston rod 10 is moved back, the clamp arms 12a and 12b are closed, and the clamping valves 18a and 1 are closed.
The upper end of the cotton cloth 35 is held between 8b and 8b. And optical fiber/
The switch is actuated by blocking the light transmitted through the section 28 with the cotton cloth 35, and the cutter 38 is actuated in response to a command signal from the control device 6 to cut the cotton cloth 35 into chips 37. In this way, the chip gripping handle holds the chip 37 at the tip.
As shown in FIGS. 3 and 4, the tip 37 is moved onto the periphery of the window glass 1 set in a predetermined position by the lifter 3 according to the next teaching information, and in the next operation, the tip 37 is moved onto the window glass 1. Descend to the point of contact. In this state, the metering pump starts operating according to the specified signal from the control device 6, and the robot R
moves the chip gripping hand H1 along the periphery of the window crow 1. At this time, the ethyl acetate that is pressure-fed from the metering pump is sent out from the tip of the wiping agent supply tube 21 to the front side of the chip 37 in a drip-like manner and in fixed amounts.
By sliding the window glass 1 into contact with the window glass 37, fat and dirt adhering to the window glass 1 are wiped off.

In this case, since the tip 37 is pressed against the window 65921 surface by the spring action of the pneumatic cylinder 7, the tip 37 moves to follow the vertical variations in the window glass 1 surface, and degreasing, etc. can be carried out satisfactorily. Chimp gripping hole H
1 has gone around the periphery of the window glass 1, a wiping end signal is issued, the supply of ethyl acetate from the metering pump is stopped, and the tip gripping hand H1 is raised to a position away from the window glass 1. Then, after returning to the predetermined position, an arrival signal is issued, and the sixth
As shown in the figure, the solenoid/help 25 is switched to the valve 27 side. Therefore, the air supply from the air supply source 70 is stopped, and the restoring force of the return spring 17 pushes down the histone rod 10, opening the clamp arms 12a and 12b via the link mechanism 11. In addition, due to the above-mentioned operation of the renoid valve 25, the air supply tube 14 and the air discharge tube 23 are strongly connected, and as the piston loft 10 is lowered, the exhaust pressure air from the lower chamber 13 of the pneumatic cylinder 8 is transferred to the air discharge tube 23.
The compressed air is discharged from the discharge nozzle portion 24 toward the cylinder 37 via the compressed air. Therefore, the chip 37 is forcibly blown away by the air pressure, and the chip 37 is forcibly blown away downward t.
This N cargo is discarded into a discharge container 40. Then, one wiping process is completed in this state, and the device returns to the position above the chip supply device C to prepare for the next wiping process.

In the above embodiment, the pneumatic cylinder 8 is used as the discharge air.
Although the exhaust pressure air from the I7X is used, it goes without saying that a separate air supply source may be provided. Also,
The wiping agent is not limited to ethyl acetate, and it goes without saying that generally known l/x degreasing agents can be used.

As described above, while the window glass 1 is being blown off, the plane shuttleper 2 moves backward and waits with the fifth window glass placed thereon. After the above-mentioned wiping process is completed and the lifter 3 is returned and the window glass l is placed on the plane shuttleper 2 again,
The plane shuttleper 2 moves forward in one motion, and the window glass 1 that was waiting is subjected to the wiping process F, and the window glass 1 from which dirt, fat, etc. has been wiped off after the wiping process F is coated with primer. Send to process P.

Figure 8 shows the primer application process P that follows the wiping process F.
This shows a system in which the wiping process F
As in the case of , a robot R having a multi-jointed robot arm Ra is installed in the work area near the lifter 3, and a brush gripping hand H is attached to the tip of the robot arm Ra.
2 is installed. And this brush gripping hand H2
A primer hardening prevention device T is installed near the brush gripping hand H2 to prevent the primer adhering to the brush 41 at the tip of the brush gripping hand H2 from solidifying when the brush gripping hand H2 is not in use. In this case as well, the window crow 1 is positioned by the lifter 3.

Next, the primer coating process in this example will be explained in detail. As shown in FIG. 9, the brush gripping node H2 has the same basic structure as the tip gripping node H1 used in the wiping step F, so the same component parts are the same. The explanation will be omitted and only the different parts will be explained.
, an air discharge tube 23 that supplies air for forcibly blowing off the used chip 37, and the chip 3.
The optical fiber 28 for confirming the grip of No. 7 is not provided.

Further, the brush 41 is directly held by the clamping pieces 18a and 18b, and the claws of the backup member 20t# are not attached. In addition, /\ke41 is, for example, acrylic-based pile strength/ant carpet, taking into consideration the separation and durability during primer application.

etc. are used.

On the other hand, in this embodiment, a nozzle mounting hole 42 is provided at the tip of one clamp arm 12a of the gripping/X hand H2, and a primer supply tube 43 is inserted into the nozzle mounting hole 42. A supply nozzle 44 with a serrated tip is brazed and arranged so that the tip of the supply nozzle 44 reaches / It communicates with a storage tank 46, and is connected to a control device 45.
The primer is pumped in fixed amounts (for example, 10 cc/I!1 inch) by a metering pump built into the unit. In this embodiment, the tank 46 is connected in communication with an inert gas pump 47 of nitrogen or carbon dioxide to isolate the primer in the tank 48 from atmospheric forces and prevent assimilation of the primer. The above-mentioned primer is, for example, a mixture of ethyl acetate with carbon black and a small amount of resin that blends well with the adhesive applied on top of the primer. When applied, the application site is masked. In some cases, a weathering agent is added to improve weather resistance against ultraviolet rays.

The other end of the air supply tube 14 communicating with the lower chamber 13 of the pneumatic syringe 8 is connected to an air supply source via a control device 45 in the middle, and is connected to a solenoid provided in the control device 45. Air supply is controlled by a valve, but unlike in the wiping process F, it is not connected to the air discharge tube 23.

Furthermore, the brush grip/hand H2 is provided with a disc-shaped lid 48 that is fitted onto the lower part of the pneumatic cylinder tuff, and the air supply tube 14 and the primer supply tube 43 pass through this lid 48. are doing.

On the other hand, as shown in FIGS. 8, 8, and 11, the primer hardening prevention device T has a container 48 into which the brush gripping hand H2 is inserted when coating is stopped, and this container 49
is attached via a fixing member 51 to a support stand 50 installed in the workshop. Also, this container 48 is open at the top:
152 is formed, and has a substantially bullet shape with a tapered portion 53 at the bottom, and has a cylindrical body portion 54 and a tapered portion 53.
A peripheral flange 5 surrounding the outer peripheral edge of the body portion 54 is located at the boundary between the
5 is provided. A plurality of through holes 5B are bored in this peripheral flange 55, and these through holes 56
A bolt 59 fixes the tip of a support shaft 58 erected on the tip ring portion 57 of the fixing member 51 in a loosely inserted state. Then, the lower surface of the peripheral flange 55 is connected to the support shaft 5.
The container 49 is supported in contact with the upper end of a coil spring 60 that is sheathed on the housing 8 , and the container 49 is elastically supported with respect to the fixing member 51 via the coil spring 80 . Therefore, the container 48 can be suppressed downward and slid in the lateral direction with respect to the fixing member 51. Further, a limit switch 61 is disposed near the lower surface of the peripheral flange 55, and the switch is turned on when the peripheral flange 55 moves downward. Further, an outward flange 62 is provided on the circumference at the upper end of the container 48.
A packing material 83 is adhered to the upper surface of this outward flange 62 in order to improve the adhesion with the lid body 48. Furthermore, a container 49 containing a primer anti-hardening agent is placed in the lower part of the body 54.
A nozzle 64 is provided for supplying water to the inside, and the tip of this nozzle 64 is connected to the brush 41 as shown in FIG.
It is arranged to face. Further, a tube 85 connected to this nozzle 64 is connected to a tank 67 via a quantitative supply device 66 that supplies a fixed amount of the primer anti-hardening agent. The primer solidification inhibitor used in this embodiment is N2 gas filled in a tank 67, which is supplied to the nozzle 64 for a predetermined period of time from the quantitative supply device 66 by turning on the limit switch 81, and from the nozzle 64 to the container. It is squirted inside 48.

The process of applying a primer to the window glass 1 will be explained.

First, when applying the primer, the brush 41 moves the gripping node H2 onto the periphery of the window glass 1 by its peaching action, and then holds the brush 41 until it comes into contact with the window glass 1. \nd H
Lower 2. In this state, the control device 45 is moved along the circumference of the crow 1. At this time, the primer supplied to the primer brush 41, which is fed under pressure from the metering pump, is sequentially applied to the periphery of the window glass 1 as the brush gripper/hand H2 moves. In this case, the primer from the metering pump is 111,
Since it is being delivered in a fixed amount, the supply nozzle 4
In order to prevent the primer from clogging in the 4 parts, a fixed amount of primer is constantly supplied to the 41 parts. In addition to this, the above /＼ 4Hi pneumatic cylinder 1 nonda? The state in which it is pressed against one surface of the window glass by the spring action of and window crow 1
The contact area with the surface does not change, and the coated layer of the primer is formed on the periphery of the window glass 1 with a uniform width and thickness, and if the parting line becomes irregular, there will be no difference. . In this state, Roho'
y) When the gripping hand H4 is raised to a position away from the window glass, the operation of the metering tube is stopped and the primer supply to the 41 is stopped.
Stop the coating process and complete -th coating process. Next, as shown in FIG.
8 from the brush 41 part. As shown in FIG. 11, a lid body 48 provided on the brush gripping hand H2
is further lowered from the state where it is in contact with the outward flange 62 provided at the upper end of the container 48 to push down the container 48 as well, and the limit switch 61 is activated on the lower surface of the peripheral flange 55. In response to this activation signal, the descent of the brush gripping hand H2 is stopped, and the quantitative supply device 66
From there, N2 gas is pumped through the tube 65.
N21 from the nozzle 64 toward the vicinity of the brush 41 for a predetermined period of time.
Gas is ejected. As a result, the inside of the container 48 is blocked from the atmosphere and an inert gas atmosphere is formed, so the brush 4
The primer solvent adhering to 1 is vaporized, and in this state it is ready for the next coating step.

Note that the N2' gas may be ejected immediately before the brush gripping hand H2 moves to the next coating step, that is, while the limit switch 61 is operating.

In the above embodiment, an example was explained in which the limit switch 61 was arranged on the lower surface side of the peripheral flange 55, but it is of course possible to change the mounting position of the limit switch 6 as appropriate, and it is not limited to the limit switch 61. Of course, a photoelectric switch or other detection device can be used as a means for detecting the closure of the lid 48. Further, as the primer solidification inhibitor, inert gases such as not only N2 gas but also CO2 gas can be used, and a primer solvent such as ethyl acetate can also be sprayed from a nozzle. Furthermore, even if the primer hardening inhibitor is not supplied into the container 48 and the container 48 is simply sealed with the lid 48, the surface of the brush can be prevented from becoming hard if the application downtime is short. I can do it. In addition, brush 4
If the first one is damaged and needs to be replaced with a new one, the clamp arms 12a and 12b can be opened and closed, so the replacement can be done by operating the clamp arms 12a and 12b.

The window glass 1 that has completed the primer application process in this way is placed on the plane shuttleper 2 through the return operation of the lifter 3, as in the case of the wiping process F.
By the forward movement of the plane shuttleper 2, it is moved forward and sent to the next adhesive application process.

In the above embodiment, the automotive window glass 1 is used as the member to which the adhesive is applied, but other materials such as glass plates 4, steel plates, plastic plates, etc. can also be used. Of course, it can be applied.

As explained above, according to the pretreatment system number in the adhesive application process of Nokunel according to the present invention, a special force is applied to wipe off dirt and fat on the Nokunel coated surface prior to primer application. 1. If the adhesive peels off due to dirt, 1.
There is no risk of oil stains or the white appearance of fat when coating with adhesive masking resin mixed into the primer, and the pre-treatment process can be replaced with the conventional two-step printing process and primer application process. Therefore, we were able to move on to the adhesive coating process by simply performing the primer coating process.

As a result, it is possible to omit the conventionally expensive printing process, making it possible to significantly reduce the manufacturing cost of Nokunel. We were able to achieve automatic completion of a series of operations in the coating process.

[Brief explanation of drawings]

FIG. 1 relates to the present invention. < Plan view showing the outline of the pre-treatment system in the adhesion step 1 of the flannel, Fig. 2 A front view of the girder lid, Fig. 4 A perspective view showing the outline of the wiping process of the flannel is a front view of the chip grip/\nd, Figures 5 and 6 are operation diagrams of the chip grip/\nd, and Figure 7 is an implementation of the chip grip/\nd and chip combination device. Fig. 8 is a perspective view showing an outline of the 4th primer application process, Fig. 9 is a front view of the gripping hand, and Fig. 10 is the gripping and primer hardening prevention. FIG. 11 is a perspective view showing an embodiment of the apparatus, and a sectional view of a container showing an example of primer solidification prevention means. 1... Window glass (panel) F... Wiping process P... Primer application process Patent applicant Nissan Motor Co., Ltd. Same applicant
Myojo Churchill Co., Ltd. Figure 5 Figure 6 Figure 7 424

Claims (1)

[Claims] Pretreatment in the adhesive application process of a panel, characterized in that a panel surface wiping process (F) and a primer application process (P) are provided as pretreatment processes for the process of applying adhesive to the panel (1). system.