JPS6110780Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a side sill painting device that automatically paints side sills provided along the longitudinal direction of a lower side surface of an automobile body.

Generally, when trying to spray paint the side sill of a car separately from other parts, for example with a paint gun, masking paper is pasted by hand on the non-painted part, the paint is sprayed, and then it dries. However, this masking process requires a lot of consumable materials (masking paper) and labor.

The present invention was developed in view of this point. During painting, masking plates are placed at predetermined positions on the outside of both side sills to follow the movement of the vehicle body by a conveyor, and the masking plates are removed at the same time as painting is completed. To provide a side sill coating device which automates masking by returning the device to its original position and evenly coats the side sill.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described in detail below with reference to the drawings.

1 to 22, reference numeral 1 denotes an automobile body whose side sill 2 at the lower center of the side surface and the lower part of the rear fender 3 at the rear end of the side surface are painted, and 4 denotes a drive means (see FIG. (not shown)
6 is a painting device for painting each painted part of the vehicle body 1, and this painting device includes a masking mechanism 7 and a painting mechanism 8.
It is composed of the following.

The masking mechanism 7 connects horizontal beams 10, 10 in a direction perpendicular to the vehicle length direction between columns 9, 9 such as building columns.
A fixed frame 12 is constructed, and vertical beams 11, 11 are connected to the transverse beams in a cross-shaped pattern, and the fixed frame 12 is positioned above the moving space of the vehicle body 1. A gate-shaped hanger 14 is suspended so as to be able to reciprocate in the direction of movement, and its lower end is positioned on the outside of both side sills 2, 2. Plate support frames 16, 16 that can be attached, masking plates 18, 18 supported by the plate support frames and masking non-painted parts 17, 17 of the vehicle body 1 above the side sills 2, 2, and the plate support frames. 16,1
positioning means 19, 19, 19, 19, which are attached to the front and rear ends (right end and left end in FIG. 1) of the vehicle body 6, and position the masking plates 18, 18 on both sides of the vehicle body 1. has been done.

The fixed frame 12 has vertical beams 11, 11
The first shaft 2 is attached to the bearings 20, 20 fixed above.
1, a second shaft 22 and a third shaft 23 are each pivotally supported, and a return cylinder 24 is fixed to one side of the longitudinal beam 11. First axis 21
And the third shaft 23 has large sprockets 25, 25.
However, small sprockets 26, 26 are fixedly installed on the second shaft 22 and third shaft 23, and a long stroke chain 27 and a short stroke chain 28 are connected to turnbuckles 29, 28 on the large sprockets 25, 25 and small sprockets 26, 26, respectively. 30 and are engaged in a loop shape. The long stroke chain 27 is connected to a bracket 31 on the rear side of the upper end of the portal hanger 14 (see FIG. 16), and the short stroke chain 28 is connected to an inner hole 33 of a bracket 32 projecting downward from the turnbuckle 30, and a return cylinder is inserted into the inner hole 33 of the bracket 32. The prongs 35 at the tips of the piston rods 34 of 24 are removably engaged (see FIG. 18), and the gate-shaped hanger 1
4 moves to the front end of the fixed frame 12 (the right end chain line position in FIGS. 1 and 2), this movement moves the long stroke chain 27, large sprocket 25, third shaft 23, small sprocket 26, short stroke The piston rod 35 is transmitted to the needle body 35 via the chain 28 and the bracket 32, and the piston rod 35 is stored in the non-driven return cylinder 24, and the portal hanger 1
4, the portal hanger 14 is moved back to the return cylinder 24 by driving the return cylinder 24.
A large _stroke expanded by the diameter ratio of the large sprocket 25 and the small sprocket 26.
S ₂ is formed so that the fixed frame 12 is returned to the rear end (the left end solid line position in FIGS. 1 and 2), and 36 and 36 prevent the engagement between the protrusion needle 35 and the bracket inner hole 33. Chain guide for ease of use. 37, 37, 37, 37 are arranged at a constant interval on the front and back (right and left in FIG. 1) of both lower ends of the gate-shaped hanger 14, respectively, and elongated gaps 38, 38, 38, 38 are formed in the vertical direction. A beam 39 which is a box-shaped guide member and connects each guide member 37, 37, 37, 37,
A lifting cylinder 15 is fixed to the side surface of the cylinder 39 on the vehicle body 1 side via a bracket 40, and a buffer spring 41 is attached to the tip of the piston rod 15a of the lifting cylinder with washers 42 and 43 at the upper and lower ends. 42, the upper part 45a of a parallel beam of the plate support frame 16, which will be described later, is supported via a bracket 44, and the elevating cylinder 15 raises the plate support frame 16 by the input of a drive source when going up, and is driven when going down. Plate support frame 16 without using a source
It is formed so that it descends under its own weight.
(See FIG. 4) The plate support frame 16 is connected to the portal hanger 14.
Parallel beams 45a, 45a and 45b, 4 are inserted into the guide member gaps 38, 38, 38, 38 on both sides and are arranged vertically at a constant interval.
5b, guide rollers 37a, 37a, which are fixedly installed in the middle part of each parallel beam and contact each guide member 37, 37, 37, 37, and both ends of each parallel beam 45a, 45a, 45b, 45b. Wall plates 46, 46, 46, 4 connected in the vertical direction, respectively
6, and movable frames 48, 48 connected to the lower portions 45b, 45b of each parallel beam via parallel links 47, 47 so as to be movable relative to the vehicle body 1, and a masking plate 18 is attached to the movable frame. are connected to each other, and the movable frame 48 is always drawn toward the lower part 45b of the parallel beam by a spring 47a. Furthermore, parallel link 47
One connecting portion is pivotally supported by connecting shafts 49, 49 of movable frames 48, 48, and the other connecting portion is swingably connected by elongated holes 50, 50 and a pin 51 that engages with the elongated hole. The masking plate 18 is formed so that the parallel movement of the masking plate 18 with respect to the plate support frame 16 is slightly disrupted in accordance with the positional shift of the vehicle body 1, so that the position of the masking plate 18 corresponds to the vehicle body 1. (See FIGS. 7 to 9) The masking plates 18, 18 are the first masking plate 18a and the second masking plate 18a in FIG.
The masking plate 18b is provided with a gap between each end edge 52a, 52b in parallel, and the side sill 2
A first masking plate 18a that blocks paint P from a paint gun 79 (to be described later) from being sprayed onto the non-painted portion 17 is disposed in a position close to the front of the first masking plate 18a.
Between the first masking plate and the side sill 2, the edge 52a of the first masking plate 18a
The second masking plate 18b is disposed such that the end edge 52b of the second masking plate 18b is located at a position Z retracted from the partition surface Y that connects the painting boundary line X. 53 is a support material for each masking plate 18a, 18b, 54 is a support material 53
The pivot bolt 55 is an adjustment bolt for adjusting the attachment angle of the support member 53 to the moving frames 48, 48.

The positioning mechanism 19 includes a plate support frame 16
attached to each wall plate 46, 46, 46, 46,
an advancing/retracting cylinder 56 that moves forward and backward with respect to the vehicle body 1;
56, 56, 56, roller support plates 57, 57, 57, 57 respectively connected to the tips of the piston rods 56a of the respective advance/retreat cylinders, and respective wall plates 46, 4 at upper positions parallel to the advance/retreat cylinders 56.
6, 46, 46 and 58, 58, 58, 5
A guide rod 5 is slidably supported via a guide rod 8 and has its tip connected to each roller support plate 57.
9, 59, 59, 59, front rollers 60a, 60a and rear rollers 60b, 60b provided at the tips of each guide rod, and roller support plates 57, 57, 57, 5 located above each positioning roller.
A plurality of guide rollers 61 and 6 are provided in each of the guide rollers 61 and 6, which are provided in a plurality of guide rollers 61 and 6, respectively, and are provided so as to be able to roll in the vertical direction on the surface of the vehicle body 1.
1, 61, 61, and a pushing roller 62a that is attached to the lower end of each roller support plate 57, contacts the side surfaces of both moving frames 48, 48, and causes the masking plates 18, 18 to approach the vehicle body 1 side together with the moving frames. Plate contact portions 62, 6 comprising
2, 62, 62, and the advance/retreat cylinder 56
The forward drive of the lift cylinder 15 and the upward drive of the lift cylinder 15 push both the moving frames 48, 48 toward the vehicle body 1 side, and the guide rollers 61, 61, 61,
61 is moved upward while contacting the vehicle body 1, and the front rollers 60a, 60a and the rear rollers 60b, 60b are moved to the tire house of the vehicle body 1.
They are formed to engage with the upper edges of Ta, Ta, Tb, and Tb to position both masking plates 18, 18 at predetermined positions (see FIG. 10).

The coating mechanism 8 includes coating machines 70, 70 disposed on both sides of the vehicle body 1, guide members 71, 71 that support both the coating machines along the moving direction (vehicle length direction) of the vehicle body 1, and Transmission sprockets 72, 72, 73, 73 arranged at the front and rear ends of both guide members
and traveling chains 74, 74 which are engaged with both transmission sprockets and whose ends are connected to the front and rear ends of tables 76, 76 (to be described later), and which are connected to transmission sprockets 72, 72 to guide the coating machines 70, 70. It is composed of drive motors 75, 75 that move the member 71.

As shown in FIGS. 11 to 15, the coating machine includes a table 76 placed on a guide member 71 and supported so as to be movable along the guide member.
and a coating machine support body 7 attached to the table.
7, and an oscillating means 80 connected to a gun advancing/retracting cylinder 78 provided on the sprayer support body and having a coating gun 79 attached thereto.

The swinging means 80 is configured to move the painting gun 79 in a moving direction (14th
It is fixed to one side (upper end in FIGS. 3 and 11) of the gun rotation rod 81 (upper end in FIGS. 3 and 11) provided perpendicularly to A) in FIGS. A sleeve member 83 is fitted onto the outer periphery of the lower part of the gun rotary rod 81 to slidably hold the gun rotary rod 81 in the axial direction using a key 82 and rotate the gun rotary rod 81 together with the gun rotary rod 81. Sprocket 84 on the outer periphery of the sleeve member
is fixed concentrically with the gun rotation rod 81, and furthermore, the gun rotation rod 81 is provided with a gun lifting cylinder 85 at its intermediate portion, and the sleeve The inner hole at the upper end of the member 83 is rotatably connected to the member 83 and is supported by a rod support base 87 that can move forward and backward with respect to the vehicle body 1 . The rod support base includes a movable frame 88 extending horizontally from the front end (right end in FIG. 11) of the coating machine support body 77 toward the vehicle body 1, and a movable frame 88 extending horizontally from the front end of the table 76 toward the vehicle body 1. It is formed by a sprayer fixed frame 89 that extends and is parallel to the lower position of the movable frame 88.

A lower bearing 86 of the gun lifting cylinder 85 is fixed to the movable frame 88 to vertically support the gun rotating rod 81, and a sprayer fixed frame 89 has a sprocket 84 that moves together with the gun rotating rod 81. Non-rotating chains 90 and 91 are arranged substantially parallel to each other on both sides of the moving area. One end (the right end in FIG. 13) of the non-rotating chain is connected to both ends of a connecting bar 92, and the connecting bar is connected at its center to a front end member 94 of the sprayer fixing frame 89 by a tension bolt 93. has been done. The other end of the non-rotating chains 90, 91 (the 13th
The left end in the figure) is connected to both ends of a switching cylinder 95 fixed to the rear end of the sprayer fixing frame 89, and maintains the non-rotating chains 90, 91 in a tensioned state by tightening the tension bolt 93.
By switching the switching cylinder 95 to either end position, either of the non-rotating chains 90, 91 is engaged with the sprocket 84, and the gun rotating rod 81 and the painting gun 79 are rotated as the sprocket moves forward and backward. is configured to operate. A connecting bar 9 that is generated when either of the non-rotating chains 90, 91 meshes with the sprocket 84.
2 and the front end member 94, the front end member 94
This is absorbed by the extra gap between the hole 96 and the outer periphery of the tension bolt 93. the non-rotating chain 90;
91 may be arranged in a U-shape instead of this example, or the non-rotating chains 90, 91 may be fixed and the switching cylinder 95 may be connected to either of the non-rotating chains. It is also possible to engage the sprockets 84, which move in conjunction with each other.

Next, the operation of the device of the present invention will be described.

First, when the car body 1 is placed on the cart 5 of the conveyor 4 and approaches the painting position at a predetermined speed, a detection means (not shown) detects that the car body 1 has entered the painting position. The masking mechanism 7 and the painting mechanism 8 are activated by the detection signal generated by the masking mechanism 7 and the painting mechanism 8.

The masking mechanism 7 includes positioning means 19,1
9, 19, 19 forward movement and plate support frame 1
6, 16, the front rollers 60a, 60a and the rear rollers 60b, 60b
are engaged with the upper edges of the tire houses Ta, Ta, Tb, and Tb of the vehicle body 1, and the plate contact portions 62,
62, 62, 62 extrusion rollers 62a, 62
both moving frames 4 by a, 62a, 62a
8, 48 toward the vehicle body 1 side, and place the masking plates 18, 18 at predetermined positions on the sides of the side sills 2, 2 (the center hole of the painting gun 79, the first masking plate edge 52a, and the painting boundary line X are on the same straight line). After being positioned at a position lined up with , the vehicle moves along with the vehicle body 1 at a predetermined speed. During this positioning, even if the parallelism between the plate support frames 16, 16 and the side sills 2, 2 is lost, the parallel links 47, 4
The relative position of the masking plates 18, 18 with respect to the side sills 2, 2 is corrected by the sliding movement of each long hole 50 of 7, 47, 47 and each pin 51.

The coating mechanism 8 is configured such that the coating machine 70 is in the starting position (first position).
2), the changeover cylinder 95 moves to the arrow B, and the gun advance/retract cylinder 78 in the coater support body 77 moves to the arrow A (15th
As the movable frame 88 moves forward, the sprocket 8 engaged with the non-rotating chain 90 moves forward.
4 rotates counterclockwise to move the paint gun 79 toward the flange-shaped front end 2a of the side sill 2 (paint gun 7
After coating, the coating gun 79 is moved in the opposite direction to the above-mentioned direction by the retreating gun advance/retract cylinder 78, so that the coating gun 79 returns to its original position and stops at the starting position.

Subsequently, the coating machine 7 is driven by the drive motor 75.
0 at a predetermined speed along the vehicle length direction in the direction opposite to the traveling direction of the vehicle body 1, and paint P continuously sprayed from the paint gun 79 at a spray angle θ is applied to the side surface 2b of the side sill 2 (as seen from the paint gun 79). (See Figure 10). This spray paint P is
The paint P attached to the side surface coating portion 2b of the side sill 2 at the spray angle θ ₂ and blocked by the first masking plate 18a within the spray angle _θ 1 is deposited on the first masking plate edge 52a. If the deposited paint forms droplets and scatters, the second masking plate 18b reliably captures the spread of the paint droplets, thereby completely preventing overspray onto the non-painted portions 17.

Subsequently, when the paint sprayer 70 comes near the rear end 2c of the side sill 2 (left side painting part when viewed from the paint gun 79), the paint sprayer 70 is stopped by the operation of a limit switch (not shown) and at the same time is switched. The cylinder 95 operates in the direction of arrow C, the gun advancement/retraction cylinder 78 operates in the direction of arrow A (see Fig. 14), and as the movable frame 88 moves forward, the sprocket 84 meshed with the non-rotating chain 91 rotates clockwise. After painting with the painting gun 79 facing the rear end 2c of the side sill 2, the gun advancing/retracting cylinder 7
8, the coating gun 79 performs the opposite operation to return to its original position, and the coating machine 70 is returned to the starting position to complete one cycle of coating.

If you want to paint the rear fender 3 following the above operation, mask the part of the vehicle body above the painted area with masking paper, etc., and then operate the gun lifting cylinder 85 to move the paint gun 79 to the height of the painted surface of the rear fender 3. The front end 3a of the rear fender 3, the side view 3b,
Paint the rear end 3c.

In addition, if the conveyor 4 stops in the middle of painting,
The coating gun 79 is configured to be able to move along the vehicle length direction by increasing the speed of the conveyor 4.

At the same time as the coating is completed by the coating mechanism 8, the front rollers 60a, 60a and the rear roller 60b,
60b is detached from the vehicle body 1 in the opposite operation to the above, the masking plates 18, 18 are retreated, and the gate-shaped hanger 1 is removed by the extension drive of the return cylinder 24.
4 to the starting position (solid line position in Figures 1 and 2). At this time, the masking plate 18,
18, each edge 52a, 52b is cleaned by wiping off unnecessary paint by a wiping mechanism (not shown) synchronized with the backward movement of the positioning means 19, and the unnecessary paint is collected and supplied to the painting gun 79 again. be done.

With the above-mentioned configuration, the present invention has a gate-shaped hanger attached to a fixed frame body so as to be able to reciprocate along the moving direction of the vehicle body, a plate support frame attached to the lower end of both sides of the gate-shaped hanger so as to be movable up and down, and each Each masking plate is connected to the plate support frame via a parallel link so that it can move forward and backward with respect to the vehicle body, and positioning means are provided at each end, and the masking plate is positioned at a predetermined position on the side of the side sill by the forward and backward movement of the positioning means. It has a function that allows the masking plate to approach the vehicle accurately, follow the movement of the vehicle body transported by a conveyor during painting, and return the masking plate to its original position when painting is completed, making it easy to automate the painting process and reduce labor. It is greatly reduced and work efficiency is improved. In addition, since the masking plate can be positioned in accordance with the vehicle body, the masking plate clearly forms a painting boundary line and reliably prevents staining of non-painted parts. Furthermore, repeated use of the masking plate eliminates the need for masking paper, which has the excellent effect of saving materials and significantly improving productivity.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the apparatus of the present invention, and FIG. 1 is a front view of the coating apparatus, FIG. 2 is a plan view thereof, FIG. 3 is a right side view taken along the line - in FIG. 2, and FIG. 1, FIG. 5 is a side view of the positioning means taken from the same line, FIG. 6 is a front view of the positioning means taken from the − line of FIG. A partial plan view of the plate support frame seen from the - line in the figure, Fig. 8 is a plan view of the parallel link enlarged from the part shown in Fig. 7, and Fig. 9 is an XI of Fig. 8.
10 is a longitudinal sectional view of the masking plate, which is an enlarged view of the part shown in FIG.
Figure 1 is a partially cutaway side view of the painting gun swinging means, Figure 12 is a sectional view taken along line XII-XII in Figure 11, and Figure 13 is a plan view of the swinging means.
Figures 4 and 15 are schematic plan views explaining the action of the swinging means, Figure 16 is an enlarged vertical sectional view of the long-stroke chain attachment part of Figure 2, and Figure 17 is an enlarged short view of the same part. A plan view of the stroke chain attachment part, FIG. 18 is a longitudinal sectional view taken along the - line in FIG. 17, and FIG. 19 is a side view of the automobile body.
FIGS. 20 and 22 are perspective views of the side sill coating section showing enlarged sections of FIG. 19 and XII, and FIG. 21 is an enlarged sectional view of the side sill taken along the line XI-XI of FIG. 19. 1...Automobile body, 2...Side sill, 3...
Rear fender, 6... Painting device, 12... Fixed frame, 14... Portal hanger, 16... Plate support frame, 18... Masking plate, 19...
...Positioning means, 47...Parallel link, 50...
Elongated hole, 51...pin, 60a...front roller, 60b...rear roller, 62...plate contact portion, 79...painting gun, Ta, Tb...tire house.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A device for masking a portion of the vehicle body above the side sill of an automobile and painting the side sill with a paint gun, which comprises: a fixed frame disposed above the moving space of the automobile body; a gate-shaped hanger that is attached to the frame so as to be reciprocally movable along the moving direction of the vehicle body and whose lower end is located near both side sills; and a masking plate that masks a portion of the vehicle body above the side sills;
The masking plate is supported so as to be movable from the side with respect to the vehicle body, and a plate support frame is attached to the lower end of the gate-shaped hanger so as to be movable up and down; 1. A side sill painting device for an automobile, characterized in that the side sill painting device comprises a positioning means that can be attached to the side sill, and the side sill is painted by positioning a masking plate and moving it together with the vehicle body. (2) The positioning means is composed of a front roller and a rear roller that engage with the front tire house and the rear tire house, respectively, and a plate abutting portion that brings the masking plate closer to the vehicle body, and the positioning means is composed of a front roller and a rear roller that engage with the front tire house and the rear tire house, respectively, and a plate abutting portion that brings the masking plate closer to the vehicle body, and the positioning means The side sill coating device for an automobile according to claim 1, wherein the masking plate is brought close to a predetermined position relative to the vehicle body as the masking plate is engaged with the rear tire house. (3) The masking plate is connected to the plate support frame via a parallel link, and one of the connection parts is formed of a long hole and a pin that slides inside the long hole, and the masking plate is connected to the plate support frame. A side sill painting device for an automobile according to claim 1, wherein the parallel movement of the vehicle body is slightly distorted according to the positional shift of the vehicle body, so that the side sill painting device follows the shape of the vehicle body.