JPS5888063A - Automatic coater - Google Patents

Abstract

PURPOSE:To eliminate the ineffective use of paint, by detecting the configuration of a workpiece to be coated, and driving a coater on the basis of the detected output when the workpiece to be coated reaches the position of the coater so as to perform automatic coating. CONSTITUTION:When a workpiece 33 to be coated being carried by a conveyer 30 reaches the position of a detecting means 40, detected output is obtained from each detecting part 43, 44, 45 and recorded in each memory circuit 75, 50, 51, respectively. The workpiece 33 to be coated is the carried to the main body 35 of the coating apparatus by the conveyer 30. When it reaches the position of the main body of the coating apparatus, output is obtained from each of the memory circuits 50, 51, and then output is obtained from the AND circuit 70 of each circuit 60, 61 for controlling the spray of a coating agent. The main body 35 of the coating apparatus is advanced by output CS4 from the memory circuit 75, and paint is sprayed from coaters 37, 38 by controlling outputs CS1, CS2 to coat the single surface of the workpiece 33 to be coated. When the workpiece 33 to be coated has passed through the main body 36 of a coater, the spray of the paint is stopped. The other surface is coated by the main body 35 of the coater in the same way.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic coating device that determines the shape of an object to be painted and controls the timing of spraying a coating material onto the object.

Conventionally, when painting a conveyed object using a gold coating machine, there are various types of automatic coating equipment that drive the coating machine and apply the coating when the object to be coated reaches the coating machine position. something is proposed. However, normal automatic painting equipment uses a cam method or drum control method, etc., in which the coating pattern is controlled by a cam that responds to the movement of the coating machine, and the coating material is applied according to a fixed coating pattern set in advance. This method controls the injection timing, and has the disadvantage that skill is required to set the coating nosoturn and that the setting pattern cannot be easily changed. Furthermore, in today's painting lines that produce a wide variety of products in small quantities, it is necessary to set up a wide variety of painting nosetans, making the equipment large and complex, making it impossible to install them in parallel. Furthermore, since the position f'L of the object being conveyed must be taken into account, the coating range cannot be accurately regulated.
The coating material was wasted, and the demand for resource conservation could not be met.

The present invention eliminates the drawbacks of the conventional apparatus, detects the shape of the object to be painted, and drives the atomizer when the object to be painted reaches the position of the atomizer based on the detection output, and adjusts the shape of the object to be painted. It is an object of the present invention to provide a new automatic coating device that can automatically perform a corresponding coating without setting an e-turn.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a circuit diagram showing an example of a coating material injection control circuit suitable for application to the present invention.

In the figure, (1) is a paint sprayer whose paint discharge is controlled on and off by compressed air. A solenoid valve (4) that is opened and closed by a control circuit that
Air is supplied through the solenoid valve (4), and the paint is injected onto the object only when air is supplied.

(6) is a transfer rock structure that moves reciprocally (for example, a pair of sprockets arranged at a required distance apart in the vertical direction) (7) and (8) between which a retaining pin ( 9)
A nine chain (6) is fixedly installed, and one or both of the striped rockets are connected to a motor (not shown) and driven to rotate in one direction. Then, the retaining pin (9) is engaged in the horizontal slit (2) of the sprayer support (2) which is guided and supported so as to be slidable in the vertical direction, and the sprayer is supported by the drive of the chain (g). The body (b) and therefore the coating machine (1) reciprocate.

(To) is a detection switch for detecting the arrival of the coating machine (1), and is turned on when the coating machine comes near the lowest position Klk. 011 is a clock pulse generation circuit, which converts a commercial AC power supply into a constant current using a constant current circuit (incorporated), half-wave rectifies it using a diode [phase], and generates a clock pulse (O
F) is generated. In this case, the clock pulse generation circuit @
is limited to the configuration shown, and any other oscillator may be used.

The wire is, for example, an 80-bit shift register, to which the detection signal (SD) of the detection switch (G) and the clock pulse (CP) of the clock pulse generation circuit (T) are supplied.
The first stage register is set by the detection signal (SD) K, and thereafter it is sequentially shifted every time a clock pulse (cp) arrives, and the output terminals (ts), (tm), ... (t8o) are sequentially shifted in binary display. 1" is obtained.

@ is a seven-turn selection switch circuit, for example, each output terminal (tl) to (is.) K-4 of a shift register.
Selection switch with lock (St) (Sg) connected to
...(Ss・) For example, a group of 511 switches (
8W1)(SW2)(SW3)i, and the other ends of the switches (Sl) to (Sio) of each switch group are connected in common to a pattern selection switch (88)K.

(2) A relay connected to the output side of the pattern selection switch (Ss), which is a solenoid valve ( 4) Open.

The operation of the above injection control circuit will be explained. First, the stripe rockets (7) and (8) are rotated so that the paint sprayer (1) moves from the lowest position to the highest position or vice versa while the shift register so shifts 40 bits (half of the total number of bits). A of the clock pulse generation circuit (control)
The pulse generation period is divided and controlled by an appropriate frequency dividing circuit mK. In practice, since the moving speed of the injection gun (1) is determined by the thickness of the paint film, etc., it is desirable to control the pulse mMkM of the clock pulse generation circuit (to).

In addition, the selection switch (S) of each switch group (8W1) (8W2) (SW5) in the nose turn selection switch circuit 4
l) ~ (See) t- Locks in the closed state depending on the area to be painted of the object to be painted. For example, K, which sets the seven turns (4) (B) (0) shown in Figure 1 in each switch group, is the switch group (switches (8,) to (Sst) of SWl and (841 )−(Sys
) Close K, pattern (for IK, switch group (8W
2) switches (8s) to (81m) and (8sr
) ~ (8ss ) and (8a) ~ (8so ) and (Sss) ~ (8y・) are closed, and the pattern (@ is the switch (Sts) ~ (81) of the switch group (8W3)
s) and (S 5) ~' (8mm) and (Sn
s) ~(8mm) and (Sss) ~(a@s)
Set to k closed.

Then, when painting nose turn (4) T-, it is assumed that the line selection switch (88) has been switched to the i switch group (8W1) side and the shift register has been reset. When rotated clockwise, the injection gun (1) begins to descend from the position shown by the solid line, and since no detection signal (8D) is obtained from the detection switch (2) at this time, 12 values are output from each output terminal of the shift register. An output of "0" is obtained on the display, so the relay @ is not energized, the solenoid valve (4) remains closed, and no paint is sprayed from the paint sprayer (1).

When the paint sprayer (1) comes into contact with the detection switch (G) and turns it on, the detection signal (8D) is set on the first stage register of the shift register, which causes the terminal (tl) to output "1". The output is obtained. However, since the switch (Sl) of the switch group (SWl) is open,
The relay @ is not energized and the solenoid valve (4) remains closed. At the same time, the coating machine (1) starts to rise completely. Thereafter, every time a clock pulse (op) arrives, the output terminal (tm
)(ts)..., the shift output becomes "1" sequentially, and when the output is obtained from the output terminal (ts), the switch (S- of the switch group (f9W1) is closed, so the relay (to) is energized, the solenoid valve (4) opens, and the coating machine (1)
Paint is sprayed from. After that, switch (S-) ~ (8r
When I) is closed, paint is continuously sprayed,
Then, the spraying is stopped from the switch (83m) position and the desired pattern is obtained, and after the sprayer (1) reaches the top, it starts descending and the switches (aS) to (Sy
While in position s), paint is again injected from the coating machine (1) and a nose turn (4) is similarly obtained, and this operation is repeated every time a detection output is obtained from the detection switch (g).

Similarly, to obtain other patterns (B) and (0), the selection switch (88) and the t-switch group (8W2) (8W5) may be switched to inert.

In the above explanation, it was assumed that there is no delay time between when the solenoid valve (4) opens (or closes) and when the paint is injected (or when the paint stops being injected). If so, the set positions of the switches in the switch group may be shifted accordingly.

In addition, when controlling the paint spray during the reciprocating motion of the paint sprayer (1) by dividing the shift register 1 into two on the upper side, e.
I explained about C, but the detection switch, shift register,
It is also possible to add a set of seven turn selection switch circuits and place the detection switch at the top position to control the paint injection during the backward movement of the paint sprayer (1). Alternatively, the pattern selection switch circuit @ may be omitted and connected to the desired output terminal kgi contact relay (2) of the shift register.

Next, an embodiment t--FIG. 2 of the apparatus of the present invention using all of the above-mentioned coating material injection control circuits will be described.

2) is a suspended conveyor for transporting objects to be painted, which are transported by a motor 0υ, and are suspended above the objects on a hanger (2) and transported.

2) is the main body of the coating equipment installed on the conveyor 〇-you, which is arranged so that it can freely move forward and backward with respect to the conveyor 〇 by means of a cylinder.
(to) is opposite to the conveyance path of the object to be coated (to), for example, 2
A set is provided.

The box is a coating device main body having the same configuration as the coating device main body (to), and is disposed at a position trailing the main body (to) with respect to the conveyor transport direction and on the opposite side of the conveyor.

The ring is a means for detecting an object to be coated, which is disposed at a position preceding the main body of the coating apparatus (2) in the direction of conveyance of the conveyor,
For example, a pair of light-emitting elements) and a light-receiving element each have a depth detection section in a direction perpendicular to the traveling direction of the object to be painted, and a height and width detection section of the object to be painted, A turn detection signal is obtained depending on the shape of the barrier to which the object to be coated has arrived.

(Incorporated) is a conveyor synchronous pulse generator that is connected to the rotating shaft of the sprocket of the conveyor and generates nine synchronous pulses (8P) in response to conveyor transport.

[51) M is a storage circuit for the object height pattern signal t14 to which the e-turn detection signal from the detection unit 14-1 and the synchronous signal from the pulse generator are respectively supplied, and is composed of, for example, a shift register. , the memory contents, which are displayed as "1" or "rO"-tck on a binary display by the detection signal, are sequentially shifted each time the synchronization nozzle (sp) arrives, and the object to be coated (2) is moved from the detection means position to the coating apparatus main body. (To) position and at 6 o'clock, outputs (IIIN) (M2) (M5) are obtained.

II il) fJ is each pattern signal storage circuit t11
(51-phase output is supplied, and the output (SDI) (8D2) of the paint sprayer position detection switch is also supplied. The output and storage circuit (451N
It has an AND circuit (70) to which the current output is supplied, and paint injection control outputs (081) (082) (
C1) is obtained.

Then, the paint injection control output (081) is sent to the main body of the coating device)
1 control output (032) (08!l) is supplied to the solenoid valve (lυ) installed in the air supply system for painting, and one control output (032) (08!l) is connected to the air supply system of the paint sprayer via the OR circuit It is supplied to the interposed solenoid valve (c).

9G is an object depth detection signal storage circuit to which the detection signal from the detection section and the synchronization pulse from the pulse generator are supplied. The object to be painted is the coating equipment itself! 4, and is perpendicular to the direction of movement of the coating machine passing through
An output corresponding to the depth of the object to be coated in a direction that substantially coincides with the facing direction of (to) is obtained, and thus an electromagnetic switching valve (r') installed in the air or oil pressure supply line of (to the cylinder) is controlled. do.

Also, regarding the coating device main body (to)', the coating device main body (2)
Circuits corresponding to the respective circuits are provided in corresponding parts as indicated by the same reference numerals with a dash added. However, the memory circuit W
<51)'fU'cIFI receives the output of the memory circuit [51) mW, shifts this sequentially, and outputs the output when the object to be coated reaches from the coating device body (to) to the coating device body -'. It is configured so that it can be obtained.

The above is an example of the configuration of the device of the present invention, and its operation will be explained next. All the memory circuits have now been reset,
Therefore, assuming that the main body of the coating apparatus is in the retreat position and that no paint is being sprayed from the coating machine, that is, the paint spray gun installed therein, the object to be coated is transferred by the conveyor (2) in this state. When the detection means position is reached, a detection output is obtained from each detection section aG44 (4s), and these are stored in the memory circuit gFjR51). Note that no output is obtained from the detection unit because there is no object to be coated at that position.When the object to be coated reaches the position of the main body of the coating apparatus, the memory circuit M (51>( During this time, the shift register of each coating material injection control circuit 1101 and the pattern signal forming circuit 11 are used to generate the detection switch signal (8D
1) (8D2), but there is no output from the memory circuit tQsx)6s until the object to be coated reaches the position of the coating apparatus main body (to), so the paint injection control output (081) is not output from the AND circuit (e). )(082)(083) cannot be obtained.

In this state, when each memory circuit Q51) C$ output is obtained, the AND circuit G't) of each coating material injection control circuit Ioφp
The output (084)K of the memory circuit g5 causes the painting apparatus main body (to) to move forward, and the control output (
081) (082) The paint is sprayed from the coating machine (2) (to) by VC and one side of the object to be coated (to) is coated, and this continues until the object to be coated (2) passes through the coating machine body e4. , then the memory circuit l
Since (084) is no longer obtained, the coating apparatus main body (To) moves backward or remains in that position, and the spraying of paint from the coating machine @ (To) is stopped.

Next, when the object to be coated reaches the position of the main body of the coating device, the main body (to) moves forward in the same manner as described above, and the KIl pocket machine moves forward.
Paint is sprayed from @'@' and the other side of the object to be painted is painted.

In the above embodiment, the coating area is divided into three parts, and a coating material injection control circuit is provided corresponding to each coating area.
T! The case has been explained in which the pattern selection switch circuit of the pattern signal forming circuit D' is set appropriately, but each switch in the pattern selection switch circuit is constructed with an active electronic switch of a transistor type instead of a mechanical switch, and is also painted. Object height and width detection unit - - A large number of detection elements are arranged on all vertical lines or are scanned under the ground, and these detection outputs are stored in separate memory circuits (M, N) (F'x =
1.2...), and these are the memory circuits (M N).
By supplying the output to the active electronic switch of the pattern signal forming circuit and controlling it, each switch of the pattern selection switch circuit is automatically set to produce a coating material injection control output corresponding to the shape of the object to be coated. (osN)k can be obtained, and the coating machine @-'(to)(2)' can be reliably automatically controlled in accordance with the shape of the object to be coated.

In addition, the nose turn signal forming circuit is omitted and the output of the memory circuit is directly connected according to the output of the shift register.
It can also be a coating material injection control output.

In the configuration shown in Fig. 2, the means for transporting the objects to be coated are the hanging conveyor 4a and the objects to be coated tl! It is also possible to use a conveyor for placing and transporting, and any transport means can be applied.

In early summer, the paint sprayer position detection switch ---')' can be used if the paint sprayers @@fJ'@' are configured so that when one reaches the lower end, the other also reaches the lower end. One switch may be omitted.

In addition, the coating machine itself is not limited to the top stripping configuration, but also other air atomization type coating machines, hydraulic atomization type coating machines (all including electrostatic coating type),
Electrostatic atomizers, powder coaters, etc. can be applied. Further, as coating materials, in addition to general organic solvent-based paints and water-based paints, powder paints, water, oil adhesives, chemicals, short fibers, etc. can be used.

The moving direction of the paint sprayer during summer is not limited to the vertical direction, but can be arbitrarily selected such as horizontal or diagonal directions.

As described above, according to the apparatus of the present invention, the shape of the object to be coated is detected by the shape detection section, and the detected shape is supplied to the memory circuit, and the detected shape is sequentially shifted according to the conveyance speed of the object to be coated. Since the coating material injection timing of the sprayer is controlled based on the output of the memory circuit when the sprayer reaches the position, the sprayer can be automatically driven and controlled with a coating area that reliably corresponds to the shape of the object to be coated. It has excellent features that can surely meet the demands for labor saving and resource saving.

[Brief explanation of drawings]

Fig. 1 is a system diagram showing an example of a coating material injection control circuit that can be applied to the present invention, Fig. 2 is a system diagram showing an example of the apparatus of the present invention, and Fig.
The figure is a circuit diagram showing an example of the coating agent injection control circuit 0. (1) is a paint sprayer, (4) is a solenoid valve, and a tmu detection switch. (Tan) is Clockz and Luz generation circuit, copper 7 register, @ is pattern selection switch circuit, @(b)'-' is paint machine, t4 brewer 51) (51) T11$! yi no zo turn signal memory circuit, (2) I'liM'suruta'
is the coating material injection control circuit, - is the shift register, - is the pattern signal forming circuit, and Q◇91 is the solenoid valve. Patent applicant: Trinity Industries Co., Ltd. - ↑・Ge1no

Claims (1)

[Scope of Claims] (1) In an automatic coating device that paints a conveyed object to be coated by a coating machine facing the conveyance path thereof, a plurality of Represents a shape detection section and the shape of the object to be coated obtained from the shape detection section /4! As soon as the turn signal is supplied, the armpit no. 9
a pattern signal storage circuit in which the turn signal is sequentially shifted by a synchronization pulse according to the conveyance train UK of the object to be coated;
An automatic coating apparatus comprising: an injection control circuit for controlling the coating material injection timing of the coating machine based on the output of the putter/signal storage circuit. (2) Coating is performed by a sequential shift circuit in which the injection control circuit Fi1 equipment position detection output is shifted by a clock pulse synchronized with the moving speed fK of the coating machine, and a shift output obtained from each shift position of the wrinkle sequential shift circuit. A pattern signal forming circuit that controls on/off of material injection and s
2. The automatic painting apparatus according to claim 1, further comprising a control circuit that controls the output of the pattern signal forming circuit according to the output of the nosetan signal storage circuit. (5) The above injection control circuit includes a sequential shift circuit in which the sprayer position detection output is shifted by a clock pulse synchronized with the moving speed of the sprayer, and an output of the pattern signal storage circuit to turn on the coating material injection. - The present invention is configured to form an off-pattern signal and to perform on/off control of the spraying material of the coating machine based on the shift output obtained from each shift position of the sequential shift circuit. Automatic painting equipment described. (4) The injection control circuit includes a sequential shift circuit in which the paint sprayer position detection output is shifted by a clock pulse synchronized with the moving speed of the paint sprayer, and a shift output obtained from each shift position of the sequential shift circuit. 2. The automatic coating apparatus according to claim 1, further comprising a control circuit that reads out the output of said turn signal storage circuit based on said number of turns and controls on/off of spraying of coating material from said coating machine.