JPH10128191A - Automatic coating equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To coat quickly a specified section of a work in the direction crossing the carrying axial line while avoiding the increase of size and also the increase of the cost thereof. SOLUTION: A coating equipment is provided with a supporting arm 11 having the arm axial line J2 crossing a work carrying line 8 at a given installation angle θ and rotating with its support S1 as a center to vary the installation angle θ, a coating material spray means 41 set on the supporting arm 11 movable reciprocatingly by the angle stroke along the arm axial line J2 and a driving means 51 moving reciprocatingly the coating material spray means 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic coating apparatus for coating a specific portion of a work (for example, an automobile body) conveyed on a work transfer path in a direction crossing the work transfer path.

[0002]

2. Description of the Related Art For example, there is known a fixed type coating apparatus for continuously coating (or topcoating) the front (bonnet), upper surface (roof) and rear (trunk) of an electrodeposited automobile body. .

As shown in FIG. 9, such a coating apparatus (1P) is provided with columns (70, 70) fixed on the floor, and horizontally arranged on the columns (70, 70) and orthogonal to the plane of the paper in the figure. An elevating frame 71 driven up and down according to the shape of the vehicle body W conveyed along a work conveying path extending in the direction of
A slider 72 slidably mounted on the elevating frame 71 and reciprocated by a predetermined stroke in a horizontal direction;
In general, the slider 72 includes a plurality of coating machines (for example, spray guns 73, 73) and the like attached at predetermined intervals.

[0004] Each of the vehicle bodies W which are continuously conveyed at a predetermined conveying speed along a work conveying path by using the above-mentioned coating apparatus 1P.
When painting the front surface of the vehicle body, the lifting frame 71 is moved up and down according to the shape and the transport speed of the vehicle body W, and the slider 72 is reciprocated, and each spray gun 73 sprays paint to paint the vehicle body W. It is reciprocated while maintaining a certain coating distance with the surface. As a result, the front surface of the vehicle body W is uniformly coated.

[0005]

By the way, a specific portion of an automobile (for example, a front portion of a hood or a roof) is
During traveling, the pebbles and the like that a preceding truck or the like jumps up easily hit the painted surface easily.

Therefore, before or after the intermediate coating step (or the top coating step), the specific portion of the vehicle body W is thickly coated in a direction crossing the work transfer path (for example, a direction orthogonal to the work transfer path). Often reinforced. That is, the reinforcing coating process is often performed on a specific portion of the vehicle body W using an automatic coating device for partial coating.

[0007] However, in this reinforcing coating process, a specific portion of the vehicle body W conveyed at a predetermined speed must be painted in a direction crossing the work conveyance path. It is difficult to form a coating film of a predetermined thickness on the specific portion if used as an automatic coating device for a vehicle.

Therefore, as shown in FIG. 10, an automatic coating apparatus for partial coating is formed by adding tracking means 75 to the coating apparatus 1P, and by driving the tracking means 75, the columns (70, 70) are formed. ) Along with the elevating frame 71 and the like along the work transfer path and in synchronization with the vehicle body W, the slider 72 (spray gun 73) is horizontally moved, etc., to reinforce a specific portion of the vehicle body W. Sometimes.

However, in order to smoothly move the heavy column 70 or the like, it is necessary to provide a large tracking means 75, which increases the size of the entire automatic coating apparatus and greatly increases the equipment cost. Become. Further, it is extremely difficult to run such a heavy column 70 or the like at high speed (forward and backward), and it is difficult to continuously reinforce a specific portion of the vehicle body W, and the production efficiency is likely to decrease.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic coating apparatus capable of quickly coating a specific portion of a work in a direction crossing a work transfer path while preventing an increase in size and cost. .

[0011]

According to a first aspect of the present invention, there is provided an automatic coating apparatus for coating a specific portion of a work conveyed along a work transfer path in a direction crossing the work transfer path.
A support arm whose arm axis intersects the work transfer path at a predetermined mounting angle and rotates around a fulcrum to change the mounting angle; and a reciprocating movement of the support arm at a predetermined stroke along the arm axis. A paint spraying means mounted so as to be mounted and a driving means for reciprocating the paint spraying means are provided.

In this invention, the mounting angle of the support arm is changed such that the direction of the moving speed (relative speed) of the paint spraying means with respect to the work transfer speed intersects (eg, is orthogonal to) the work transfer path.

[0013] With this, the paint spraying means is moved along the arm axis while spraying paint toward the work conveyed to the work conveyed on the work transfer path, so that the work is conveyed to a specific portion of the work. A coating film having a predetermined thickness is formed in a direction crossing the road.

According to a second aspect of the present invention, there is provided an automatic coating apparatus for coating a specific portion of a work conveyed along a work transfer path in a direction crossing the work transfer path, wherein an arm axis is provided at a predetermined mounting angle with the work transfer path. A support arm intersecting with, and a paint spraying means mounted on the support arm so as to be able to reciprocate at a predetermined stroke along the arm axis,
A drive means for reciprocating the paint spraying means and a speed switching means capable of switching a moving speed of the paint spraying means are provided.

In this invention, the magnitude of the moving speed of the paint spraying means is changed so that the moving speed (relative speed) of the paint spraying means with respect to the work transfer speed intersects (eg, is orthogonal to) the work transfer path. . Thereby, a coating film having a predetermined thickness can be formed on a specific portion of the work in a direction crossing the work transfer path.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) As shown in FIGS. 1 to 5, the basic structure of this automatic coating apparatus is the same as that of a conventional example (FIG. 9).
A support arm 11, an attachment angle changing unit 31, a paint spraying unit (41), and a driving unit 51 are provided, and are supported in accordance with the transport speed (v1) of the workpiece (W) transported on the workpiece transport path 8. By changing the mounting angle θ of the arm 11, a specific portion (W1, W2) of the work (W) can be painted with a predetermined thickness in a direction crossing the work transfer path 8.

The same parts as those in the conventional example (FIG. 9) are denoted by the same reference numerals, and description thereof will be simplified or omitted. Painting of a specific portion (for example, the front portion W1 of the hood, the front portion W2 of the roof) of a work (for example, an automobile body W) using the present automatic coating device is performed before the intermediate coating process (or the top coating process). You. It may be carried out after the intermediate coating step (or the top coating step).

More specifically, as shown in FIG. 1, the support arm 11 is mounted on the gantry 2 by a lifting base 16 and a support frame 7.
Intersects with the transfer axis J1 of the work transfer path 8 at a predetermined mounting angle θ, and rotates around a fulcrum (support shaft S1) to change the mounting angle θ. Mounted movably.

The gantry 2 is erected on a base 5 so as to be located on the side of the work transfer path 8 as shown in FIG. The support frame 7 includes the base 5 and the upper support 3 of the gantry 2.
Are arranged so as to be rotatable about the support shaft S1 via bearings (4, 6).

The support frame 7 is provided with an elevating guide rail 23 extending vertically. The elevating base 22 is supported by the elevating guide rail 23 so as to be vertically movable. The support arm 11 is mounted on the elevating base 22 so as to obliquely cross the work transfer path 8.

The mounting angle changing means 31 is shown in FIGS.
As shown in FIG.
3 and the rotation position regulating member 35,
The rotation position of the support arm 11 with respect to a reference line (Js) that intersects the transport axis (J1) at a predetermined angle θs is formed so as to be changeable.

As shown in FIG. 4, the swing cylinder device 32 has its base end rotatably mounted on the base 5 and its piston rod 32a connects the connecting member 33 to the lower portion of the support frame 7. Are connected via

The rotation position restricting means 35 includes a stopper 38,
It includes one and other angle adjusting bolts (36A, 36B), and is formed so that the rotation limit of the support arm 11 can be determined. One and other angle adjustment bolts (36A, 36
B) is opposed to the support frame 7 via the bracket 37, and one of them is in contact with the stopper 38 on the gantry 2 side to regulate the rotation position of the support arm 11.

That is, by rotating the one-angle adjusting bolt 36A to increase the amount of protrusion at the tip thereof, the amount of rotation in the counterclockwise direction in FIG. 4 with respect to the reference line (Js) is reduced, and the amount of protrusion is reduced. By reducing the amount, the amount of rotation increases. Similarly, by rotating the other angle adjusting bolt 36B to increase the amount of protrusion at the tip thereof, the amount of rotation in the clockwise direction in the figure with respect to the reference line (Js) decreases,
The amount of rotation increases by reducing the amount of protrusion.

As shown in FIG. 1, the elevating means 21 includes an elevating cylinder device 25 and a connecting member 26, and is formed so that the support arm 11 can be moved up and down via an elevating base 22. Specifically, the tip of a piston rod 25 a of a lifting cylinder device 25 is connected to the lifting base 22 via a connecting member 26.

Therefore, by driving the lifting / lowering cylinder device 25 to protrude the piston rod 25a upward, the support arm 11 is raised via the lifting / lowering base 22, and the piston rod 25a is retreated downward to be supported. The arm 11 moves down.

In this embodiment, the support arm 11 is moved up and down more smoothly and reliably.
A counter weight 29 is connected to 1 via a chain 28 hung on a sprocket 27 on the upper side of the support frame 7. The counterweight 29 is formed such that its weight is equivalent to the total weight of the lifting base 22 and the support arm 11.

As shown in FIG. 3, the drive means 51 includes a drive motor 52, a motion conversion device 53 for converting the rotary motion into a linear motion, and a rotary power for transmitting the rotational power of the drive motor 52 to the motion conversion device 53. A transmission mechanism (55);
The support portion 43 of the spray type coating machine 41 connected to the motion conversion device 53 via the connecting member 54 is formed so as to be able to reciprocate at a predetermined moving speed along the arm axis (J2) of the support arm 11. I have.

The drive motor 52 is an AC servomotor. The motion converter 53 is formed of an intelligent actuator manufactured by THK. The rotation power transmission mechanism is formed from a belt transmission mechanism 55. In FIGS. 1 and 3, reference numeral 9 denotes a collision prevention detection sensor (photoelectric switch) for preventing the coating machine 41 or the like from colliding with the work (W).

Next, the operation of this embodiment will be described. A specific portion (the front portion W1 of the bonnet) of the work (car body W) conveyed at the predetermined conveyance speed v1 along the work conveyance path 8 is moved in a direction (width direction) orthogonal to the work conveyance path 8 (the conveyance axis J1). Fig. 5 (A)
As shown in the figure, first, the moving speed v2 of the coating machine 41 with respect to the transport speed v1 of the work (W) (that is, the relative speed v3).
The mounting angle θ of the support arm 11 is changed by using the mounting angle changing means 31 so that the direction of the support arm 11 is orthogonal to the transport axis (J1). Here, the support arm 11 is located on the reference line (Js).

Next, when the work (W) approaches the automatic coating apparatus, the lifting / lowering means 21 is driven to move the support arm 11 to a position higher than the front surface W1 of the hood of the work (W) by a predetermined distance. Set to. Next, in this state, the coating machine 41 is moved to the front part W of the hood of the work (W).
5A is moved upward along the arm axis (J2) in FIG. This allows
On a specific portion W1 of the work (W), a coating film having a predetermined thickness is uniformly formed in a direction orthogonal to the transport axis (J1).

When the specific portion (W1) of the work (W) is particularly thickly coated, the specific portion (W1) is painted once as described above, and then, as shown in FIG. By driving the angle changing means 31 to rotate the support arm 11 with respect to the reference line (Js), the mounting angle becomes (180 °-
θ). Next, in that state, the coating machine 4
5 is moved downward along the arm axis (J2) in FIG. 5A to reinforce and paint a specific portion (W1) of the work (W).

Further, for example, when the transfer speed of the work (W) is switched to a speed v1 'which is higher than the speed v1, the support arm 11 is rotated with respect to the reference line (Js) to change the speed ( v1 ′), the direction of the moving speed v2 of the coating machine 41 is perpendicular to the transport axis (J1).
2 (> θ1)]. Even when the transfer speed of the work (W) is switched to a low speed, the mounting position of the support arm 11 is changed in the same procedure.

In the same procedure as described above, another specific portion of the work (W) (the front portion W2 of the roof) can be smoothly and rapidly subjected to reinforcement coating.

According to the first embodiment,
The arm axis (J2) is aligned with the transport axis (J
1) and a fulcrum (S
1) A support arm 11 which can be rotated around the center to change the mounting angle θ, and a coating machine 41 mounted on the support arm 11 so as to be able to reciprocate at a predetermined stroke ST1 along the arm axis (J2). And a driving means 51 for reciprocating the coating machine 41, the specific portion (W1, W1) of the work (car body W) conveyed through the work conveyance path 8 is provided.
W2) can be uniformly coated with a predetermined thickness in a direction (width direction) orthogonal to the work transfer path 8.

Further, the mounting angle changing means 31 for changing the mounting angle θ with respect to the transport axis (J1) by rotating the support arm 11 is provided, so that the work (W) transport speed v1 can be more quickly and accurately adjusted. Thus, the mounting angle θ of the support arm 11 can be changed.

Note that a specific portion (W1, W
2) was painted (reinforced painting) in a direction orthogonal to the work transport path 8 (transport axis J1), but by changing the mounting angle θ of the support arm 11 as appropriate, it was not 90 ° with respect to the transport axis (J1). It is also possible to paint in the direction crossing at an angle.

For example, a specific portion (W1,
In order to paint W2) in a direction in which the intersection angle with respect to the workpiece transport path (transport axis J1) is 80 °, the moving speed (relative speed) of the coating machine 41 with respect to the transport speed of the workpiece (W) and the transport axis (J1) Is changed so that the angle formed by the support arm 11 becomes 80 °.

(Second Embodiment) A second embodiment is shown in FIG.
Is shown in This automatic coating apparatus has the same basic configuration as that of the first embodiment (FIGS. 1 to 5), but the first embodiment employs a support arm for changing the transfer speed (v1) of the work (W). 11 was changed by changing the mounting angle θ, the speed switching means 70 was provided and the paint spraying means (4
It is characterized in that it is configured to follow by switching the moving speed of 1).

The same components as those in the first embodiment (FIGS. 1 to 5) are denoted by the same reference numerals, and description thereof will be simplified or omitted.

In this embodiment, the support arm 11 is fixed using a fixing member such as a bolt 19B such that the arm axis (J2) intersects the transport axis (J1) at a predetermined mounting angle θ. . Also, the speed switching means 70
Includes an inverter 71 and a speed setting device 72, and is formed so as to be able to switch the rotation speed (rpm) of the drive motor 52 of the drive means 51.

In the automatic coating apparatus having the above configuration, as shown in FIG. 7, the moving speed v2 (relative speed v3) of the coating machine 41 with respect to the transfer speed (v1) of the work (W) is orthogonal to the transfer axis (J1). Then, the magnitude of the moving speed v2 of the coating machine 41 is changed. Thereby, the transport axis (J
1) The specific portion (W) of the work (W) conveyed along
1, W2), a coating film having a predetermined thickness can be uniformly formed.

When the transport speed of the work (W) is switched to a speed v1 'which is higher than the above-mentioned speed v1,
The magnitude of the moving speed is changed from the speed v2 to the speed v2 'in accordance with the increase in the conveying speed so that the moving speed (relative speed) of the coating machine 41 with respect to the speed (v1') is orthogonal to the conveying axis (J1). To increase. When the transfer speed of the work (W) is switched to a low speed, the moving speed of the coating machine 41 is reduced in the same procedure. In this embodiment, when the moving speed of the coating machine 41 is increased, the amount of paint ejected from the coating machine 41 is increased, and when the moving speed is decreased, the amount of paint ejected from the coating machine 41 is reduced. It is configured such that a coating film having a constant thickness can be formed on specific portions (W1, W2).

Further, the support arm 11 is rotated about the fulcrum (S1) in the same manner as in the first embodiment so that the mounting angle θ
Can be changed so that it can follow a change in the transport speed (v1) at the same time as a change in the width (L) of the work (W).

That is, the mounting angle of the support arm 11 is changed (θ3 → θ4) in response to the change of the width of the work (W) (L1 → L2), and the transfer speed of the work (W) is changed (v1). By changing the moving speed of the coating machine 41 (v2 → v2 ″) in response to (v1 ″), the work (W)
A specific portion (W1 or the like) of the work (W) can be painted in a direction crossing the transport axis (J1) by quickly following changes in the width dimension (L) and the transport speed (v1) of the workpiece.

[0046]

According to the first aspect of the present invention, the support arm, the paint spraying means, and the driving means are provided, and the mounting angle of the support arm is adjusted in accordance with the transfer speed of the work to be transferred on the work transfer path. Since it is configured to be changeable, it is possible to quickly paint a specific portion of the work in a direction crossing the work transfer path while preventing an increase in size and cost.

According to the invention of claim 2, the support arm,
A paint spraying means, a driving means, and a speed switching means,
Since the moving speed of the paint spraying means can be changed according to the work transfer speed, the direction in which a specific part of the work intersects with the work transfer path quickly while preventing an increase in size and cost. Can be painted.

[Brief description of the drawings]

FIG. 1 is a side view for explaining an embodiment of the present invention.

FIG. 2 is a plan view for explaining a positional relationship between a support arm and a transport axis.

FIG. 3 is a plan view for explaining a positional relationship between a support arm and a gantry.

FIG. 4 is a view for explaining a mounting angle changing unit.

FIG. 5 is a view for explaining the relationship between the transfer speed of the work and the mounting angle of the support arm.

FIG. 6 is a diagram for explaining a second embodiment of the present invention.

FIG. 7 is a view for explaining the relationship between the transfer speed of the work and the moving speed of the coating machine.

FIG. 8 is a view for explaining the relationship between the transfer speed and width of the work, the moving speed of the coating machine, and the mounting angle of the support arm.

FIG. 9 is a diagram for explaining a conventional example (1).

FIG. 10 is a diagram for explaining a conventional example (2).

[Explanation of symbols]

 2 gantry 5 base 7 support frame 11 support arm 21 elevating means 22 elevating base 25 elevating cylinder device 31 mounting angle changing means 32 swing cylinder device 35 rotation position restricting means 41 coating machine (paint spraying means) 51 driving means

Claims (2)

[Claims] 1. An automatic coating apparatus for coating a specific portion of a work conveyed along a work transfer path in a direction crossing the work transfer path, wherein an arm axis crosses the work transfer path at a predetermined mounting angle and a fulcrum. A support arm capable of changing the mounting angle by rotating about the center, a paint spraying means mounted on the support arm so as to reciprocate at a predetermined stroke along the arm axis, and reciprocating the paint spraying means. An automatic coating apparatus, comprising: a driving unit for causing the automatic coating apparatus to perform the operation. 2. An automatic coating apparatus for coating a specific portion of a work conveyed along a work transfer path in a direction crossing the work transfer path, wherein a support arm whose arm axis crosses the work transfer path at a predetermined mounting angle. A paint spraying means mounted on the support arm so as to be able to reciprocate at a predetermined stroke along the arm axis, a driving means for reciprocating the paint spraying means, and a speed capable of switching the moving speed of the paint spraying means. An automatic coating apparatus, comprising: a switching unit.