JPH0225502Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a liquid application device, and particularly relates to an improvement in the application shape of a liquid such as a sealant (hereinafter referred to as a sealant).

[Prior art]

In general, a liquid applicator is a device that applies a sealant to a workpiece from a coating nozzle while moving the coating nozzle along the coating line of the workpiece. It is desirable that the coating be applied to the workpiece accurately along a predetermined coating line, and the applicant of the present application has designed a coating system that encloses this at the tip of the coating nozzle to enable coating that meets these requirements. They have devised a method in which a brush is attached and the outer periphery of the brush is covered with an elastic sleeve, and has already filed an application (see Japanese Utility Model Application No. 59-158473).

In addition, as a conventional device that can uniformly apply the sealant to a uniform thickness, a forming spatula is attached to the rear of the coating nozzle, and the sealant applied to the workpiece in a roughly rod shape is press-formed to a predetermined thickness using the forming spatula. The thing I made was hot. However, in a product equipped with this forming spatula, when applying along a curved application line with a small curvature, the forming spatula cannot trace the application line correctly, and as a result, the application trajectory of the sealant may deviate from the application line. However, there was a problem that the coated shape was likely to be non-uniform.

[Purpose of invention]

The present invention has been made in view of these conventional problems, and an object of the present invention is to provide a liquid coating device that can accurately apply liquid along a desired coating line and can make the coating shape uniform.

[Structure of the idea]

The present invention is a liquid coating device in which a forming member such as a forming spatula or a forming roller is provided behind the coating nozzle in the gun body so as to be rotatable around its axis, and the nozzle position detects the position of the coating nozzle on the coating line. a detection means, a control device that has position information of the coating line and calculates the position of the forming member on the line based on the output of the nozzle position detection means;
A molded member turning device is provided which rotates the molded member to position it on the coating line in accordance with the output of the control device, thereby preventing the molded member from shifting from the coating line.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Figures 1 to 3 show an embodiment of the present invention, and in the figures, 1 is a gun body moving device for moving the gun body along the coating line of the workpiece, and this is used to move the gun body back and forth. It is comprised of a longitudinal movement device 2 that moves in the direction (perpendicular to the plane of the drawing in FIG. 1), a lateral movement device 3 that moves in the left-right direction, and a vertical movement device 4 that moves in the vertical direction.

The left-right movement base 3a of the left-right movement device 3 is fixed to a floor surface or the like, and a left-right sliding member 3c is fitted into a guide rail 3b formed in the left-right direction on the base 3a so as to be slidable in the left-right direction. There is. Further, a servo motor 3d is attached to the right end surface of the lateral movement base 3c, and a feed bar provided in the lateral movement base 3a and formed with a ball screw is attached to the output shaft of the servo motor 3d. The bar is screwed into the left and right sliding member 3c.

A vertically movable base 4a of the vertically movable device 4 is fixed to the left and right sliding member 3c, and this is a rod-shaped body extending in the vertical direction. Sliding member 4c
is fitted so as to be slidable in the vertical direction. Furthermore, a servo motor 4d is mounted on the upper end surface of the vertical movement base 4a.
is attached, and a feed bar attached to its output shaft is screwed into the vertical sliding member 4c.

Further, a longitudinally movable base 2a, which is a rod-shaped body extending in the longitudinal direction of the longitudinally moving device 2, is fixed to the vertically sliding member 4c, and a longitudinally movable member 2b is attached to the longitudinally movable base 2a in the longitudinal direction. It is slidably attached, and a feed bar of a servo motor 2d attached to the rear end of the longitudinally moving base 2a is screwed into the sliding member 2b.

A gun main body 5 is attached downwardly to the lower surface of the support bracket 2c attached to the longitudinal sliding member 2b. Discharge port 5 of the gun body 5
A coating nozzle 6 is connected to the inlet 5b.
A flexible sealant supply hose 7 is connected to. The gun body 5 also includes a coating on/off switch for supplying and shutting off the sealant to the coating nozzle 6.
An off valve 5c is formed, and the valve 5c
A piston 5e is slidably inserted into the sliding hole 5d, and a valve body 5f fixed thereto can come into contact with the valve seat 5g, and the valve body 5f is urged upward by a return spring 5h. has been done. Further, a high pressure air supply passage 5i is connected to the sliding hole 5d, and a switching valve 5 is connected between the passage 5i and the air source 5j.
k is inserted.

Further, the nozzle 6 is inserted and fixed into the holding part 10a of the steady-stop bracket 10, and the support part 10b of the steady-stop bracket 10 is inserted into the support bracket 2.
It is fixed to the bottom surface of c. A forming spatula 8 for press-molding the sealant applied from the coating nozzle 6 is disposed at the lower end of the coating nozzle 6, and a base 8a of the forming spatula 8 is rotatable to the coating nozzle 6. The forming part 8b of the forming spatula 8 is located slightly behind the coating nozzle 6.
The lower part of the molded part 8b is gently curved rearward, and a molded recess 8c is formed in the front of the curved part, and the recess 8c has a width W1 at the upper end and a width W1 at the lower end.
2, and changes approximately linearly between them.

The front side of the base 8a has a semicircular shape, and this part is processed with gears to form a driven gear part 8d. A gear 9a is engaged with the drive shaft 9b of the drive gear 9a, and a step motor 9c is connected to the drive shaft 9b of the drive gear 9a.
The output shaft of the step motor 9 is connected to the step motor 9.
c is attached to the support bracket 2c. Note that 9d is a bearing for supporting the drive shaft 9b, and this is attached to the holding portion 10a of the steadying bracket 10.

Further, a magnet 11 is installed above the forming spatula 8 of the coating nozzle 6 for lifting the forming spatula 8 upward.
A return spring 12 is fitted between the base portion 8a of the forming spatula 8 and the forming spatula 8 to urge the forming spatula 8 downward.

Further, a degreasing device 13 for removing oil etc. adhering to the workpiece is disposed in front of the coating nozzle 6, and a degreasing wheel 13a to which a driven gear 13c of the device 13 is fixed is operated by the above-mentioned vibration. Stop bracket 1
The degreasing member 13b is radially attached to the degreasing wheel 13a. Further, a drive gear 13f fixed to a drive shaft 13d meshes with the driven gear 13c, and the drive shaft 13d is connected to the output shaft of an AC motor 13e attached to the support bracket 2c.

15 is a control device, which provides drive signals A to C to each of the servo motors 2d to 4d, and
The position of the coating nozzle 6 is calculated based on the position detection signals D to F from the encoders 2e to 4e provided in each of the servo motors 2d to 4d, and the spatula rotation device 9, magnet 11, and degreasing device 13 are operated based on the calculation results. and a drive signal G for driving the switching valve 5k.
Output.

Next, the operation will be explained.

The control device 15 of the apparatus of this embodiment stores the position information of the coating line, moves the gun body 5 and the coating nozzle 6 along this coating line, operates the degreasing device 13 in this state, and controls the coating nozzle. A sealing agent is applied from 6, and a spatula rotating device 9 and a magnet 11 are driven so that the forming spatula 8 is positioned on the coating line at a predetermined distance from the workpiece.

First, in order to move the coating nozzle 6 along the coating line, the control device 15 applies servo motor drive signals A to C to the servo motors 2d to 4d, which causes the sliding members 2b, 3c, and 4c to move forward and backward, respectively. The coating nozzle 6 moves along the coating line by moving horizontally, horizontally, and vertically. At this time, the AC motor 13e is actuated by the drive signal G to rotate the degreasing wheel 13a counterclockwise in FIG. 2, thereby degreasing the upper surface of the coating line of the workpiece. Furthermore, at this time, the switching valve 5k is switched to the state shown in FIG.
is supplied onto the coating line of the workpiece.

Next, the operations of the spatula rotating device 9 and the magnet 11 will be explained. As mentioned above, the control device 15 stores the coating line in advance, and the control device 15 operates based on the detection signals D to F of the encoders 2e to 4e. The current position of the coating nozzle 6 is calculated based on the current position, and the position of the forming part 8b of the forming spatula 8 on the coating line is calculated based on the current position, and a drive signal G is generated to bring the forming part 8b to this position. It is applied to the step motor 9c of the spatula rotating device 9. Then, as shown in FIG.
The forming spatula 8 is rotated so that the forming part 8b is located on the coating line 20.

For example, when coating on a downward slope, the distance between the forming part 8b of the forming spatula 8 and the workpiece becomes narrower, and the coating thickness becomes thinner. The signal G turns on the magnet 11 and pulls the forming spatula 8 upward, thereby maintaining the correct distance between the forming part 8b and the workpiece.

As described above, in this embodiment, the forming part 8b of the forming spatula 8 is rotated so as to be positioned on the coating line,
Further, since the molding part 8b and the workpiece are moved up and down so that the distance between them is constant, the sealant can be applied correctly along the application line and the application shape can be made uniform.

In the above embodiment, the case where the magnet 11 was provided was explained, but the magnet 11 is not necessarily necessary in the present invention. Further, a forming roller may be used in place of the forming spatula.

[Effect of idea]

As described above, according to the liquid applicator according to the present invention, the molded member is rotatably provided behind the application nozzle of the gun body, and the molded member is rotated so as to be positioned on the application line. can be applied precisely along the application line, and
It has the effect of making the coated shape uniform.

[Brief explanation of the drawing]

Fig. 1 is a front view of a liquid applicator according to an embodiment of the present invention, Fig. 2 is a side view of the gun body and spatula rotating device portion, Fig. 3 is a perspective view of the forming spatula portion, and Fig. 4 is a FIG. 3 is a diagram for explaining the operation. 1... Gun body moving device, 2e to 4e... Encoder, 5... Gun body, 6... Application nozzle, 8
... Forming spatula, 9... Spatula rotation device, 15... Control device.

Claims (1)

[Claim for Utility Model Registration] A device for applying a liquid such as a sealant to a workpiece, comprising: a gun body having a coating nozzle at the tip; and a gun body moving device that moves the gun body along the coating line of the workpiece. a forming member that is rotatably provided behind the coating nozzle of the gun body and presses and forms the liquid applied from the coating nozzle; and the current position of the coating nozzle that is moved by the gun body moving device. a nozzle position detection means for detecting the coating line; and a nozzle position detection means for storing the coating line, calculating the nozzle position from the output of the nozzle position detection means, and detecting the coating line on the coating line of the forming member based on the current position of the coating nozzle and the position information of the coating line. a control device that calculates the position of the coating device and outputs the calculation result; and a control device that receives the output of the control device and rotates the forming member to be located on the coating line according to the position of the coating nozzle on the coating line. A liquid coating device comprising: a member turning device.