JP4342670B2 - Multicolor coating conveyor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transport apparatus for realizing multicolor electrodeposition coating using a common transport line. In the present invention, the workpiece posture of a type in which the workpiece is fixed on the floor and supported on the floor conveyor is supported by the floor conveyor posture, and the workpiece posture of the type of supporting the suspension is overhead conveyor posture, to the side of the conveyor The posture supported in a substantially horizontal state is called a side conveyor posture. In addition, rotating in a plane orthogonal to the traveling direction is called lateral rotation.
[0002]
[Prior art]
Electrodeposition coating on the body of a vehicle is generally performed by placing a conveyor on a paint tank and dipping the workpiece that is suspended and moved into the paint tank (an example) (See Japanese Patent Publication No. 6-104920). Moreover, when performing the coating from which a coating color differs in multiple using such a coating line, there exists the method shown to A and B of FIG.
[0003]
In the method A, two different colors (color 1 and color 2) of separate paint tanks T1 and T2 are provided side by side, and the branch lines B1 and B2 of the conveyor are arranged on the respective tanks. The work is connected to the main line M of the conveyor before and after the paint tank, and the work is branched to either the branch line B1 or B2 according to either the color 1 or the color 2, and the corresponding paint tank T1 or Dipping processing is performed at T2. Hereinafter, this is called a branching type. In the method B, the paint tank T3 is disposed on the paint tank T3 provided with only one main line M of the conveyor, and the paint tank T3 and the paint tank T4 are switched each time the paint color changes to either color 1 or color 2. . Hereinafter, this is referred to as a color change type.
[0004]
[Problems to be solved by the invention]
By the way, in the said branch type, since the main line M isolate | separates into branch line B1, B2, a conveyance line increases, As a result, each increase of capital investment and installation space is caused. On the other hand, in the color change type, it takes a lot of time to replace the paint tank, and the efficiency is deteriorated. SUMMARY OF THE INVENTION In order to solve such problems, the present invention has an object to provide a transport device that selectively performs two different colors without increasing the number of lines and changing colors.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the multi-color coating conveying device according to the present application is provided with coating execution units having different coating colors on both the left and right sides of one conveyor, and is located in the coating execution unit at a part of the conveyor. When the workpiece moved by being guided by the conveyor moves to the movable portion, the movable portion is rotated around a rotation axis arranged in parallel with the traveling direction of the workpiece to move the workpiece in the traveling direction. On the other hand, it is characterized in that it is rotated to the left or right in a plane orthogonal to each other, and is painted in a predetermined paint color by one of the painting execution units. At this time, the coating can be electrodeposition coating, and the coating execution unit can be a dipping paint tank. In addition, the coating execution part in this invention is a paint tank in which the dipping process of electrodeposition coating etc. is carried out, and a spray type and a brush coating type become each booth.
In the case of electrodeposition coating, the paint tank is placed opposite to the left and right, the partition wall that forms the boundary between both paint tanks is placed adjacent to and touching the lower part of the conveyor, and the work is supported by a carrier that moves along the conveyor. Move to the movable part with the floor conveyor posture in an upright support state, and enter the paint tank on either the left or right side while swinging in an arc-shaped locus around the rotation axis by the horizontal rotation of the movable part, from the conveyor The overhead conveyor posture in the suspended state is changed to be dipped.
[0006]
【The invention's effect】
According to the present invention, when the workpiece guided and moved by the conveyor comes to the coating execution section, the workpiece is rotated horizontally to either the left or right side, and the coating execution sections having different coating colors are arranged with the conveyor interposed therebetween. In this case, it is painted in a predetermined paint color at the painting execution unit. Therefore, different paint colors can be selectively applied depending on the horizontal rotation direction of the workpiece. This allows a common conveyor to be used even when multiple colors are mixed, and it is not necessary to provide a dedicated branch line, so both installation space and investment are possible. Can be reduced. Moreover, since it is not necessary to change colors (replacement of tanks) and the workpiece can be conveyed continuously, there is no color change loss (replacement loss of tanks), and the coating efficiency is remarkably improved.
[0007]
Also, if the coating method is electrodeposition coating, there are dipping paint tanks with different paint colors on the left and right sides of the conveyor, and the workpiece moved to this paint tank part rotates horizontally and swings to the left or right. The paint color is selected and dipped. Therefore, multicolor coating can be efficiently performed by electrodeposition coating.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment applied to a body electrodeposition coating line for a motorcycle will be described with reference to the drawings. C of FIG. 2 shows the outline of this electrodeposition coating line, and the workpiece | work 1 which is the vehicle body of a two-wheeled motor is supported by the conveyor 2 extended linearly, and moves. The conveyor 2 corresponds to the main line in the conventional example.
[0009]
On the left and right sides of the conveyor 2, there are electrodeposition coating execution units, and a first paint tank 20 and a second paint tank 30 in which paints having different paint colors are placed are provided. The first paint tank 20 contains color 1 paint, and the second paint tank 30 contains color 2. However, these colors are arbitrary. For example, color 1 can be gray, color 2 can be red, and the like.
[0010]
Next, the workpiece transfer mechanism will be described. 3 is a side view in which a movable part provided in a part of the conveyor 2 is partially cut away with respect to the support part of the work 1, FIG. 4 is a plan view showing the action, and FIG. FIG.
[0011]
As is clear in these drawings, the conveyor 2 has a rectangular tube shape and has a movable portion 4 in a part of its length direction. The movable part 4 can be rotated laterally by a step motor 5, the step motor 5 is fixed in one conveyor 2 sandwiching the movable part 4, and the rotation shaft 6 passes through the movable part 4 to the other conveyor 2. Here, the tip is fixed to the vertical wall 8. The movable portion 4 can rotate integrally with the vertical wall 7 and the rotary shaft 6, thereby rotating synchronously with the rotary shaft 6.
[0012]
The step motor 5 can be rotated either forward or backward, and the rotation amount of the rotary shaft 6 that is the output portion corresponds to the rotation direction and the rotation angle of the work 1 supported by the carrier 3, and the rotary shaft 6 is either If the workpiece 1 is rotated approximately 90 ° in the rotation direction, the workpiece 1 assumes a side conveyor posture, and if rotated approximately 180 °, the workpiece 1 assumes an overhead conveyor posture. If it reverses from this overhead conveyor posture position, it will become a side conveyor posture again, and will also return to the original floor conveyor posture.
[0013]
At this time, the workpiece 1 can be held in an intermediate position by rotating the step motor 5 at a smaller angle. If the forward rotation and the reverse rotation are repeated at a minute angle, a small swing width is obtained. Can be swung left and right. The rotation control of the step motor 5 can be easily realized by an appropriate control device (not shown) using a microcomputer or the like, and various conditions such as a rotation direction, a rotation amount, and a rotation timing can be arbitrarily set.
[0014]
The carrier 3 is connected so as to move along each side surface of the conveyor 2 and the movable portion 4, and the carrier 3 is transferred from the slit 9 formed continuously on the side surface in the length direction to the inside of the conveyor 2 and the movable portion 4. The three protrusions 10 protrude, and rollers 11 provided at the four corners of the front and rear and upper and lower sides are supported by the protrusion 10.
[0015]
As a result, the carrier 3 is movable by the roller 11 that rolls inside the conveyor 2 and the movable portion 4, and moves in the traveling direction F by an appropriate driving means (not shown). A horizontal arm 12 extends laterally from one side of the carrier 3, and a tip 13 of the horizontal arm 12 is bent at a substantially right angle, and the work 1 is supported by a support stay 14 here.
[0016]
The support of the work 1 in the floor conveyor posture shown in FIGS. 3 to 5 is an upright state which is a state when the motorcycle is used, and is supported so that the front and rear are along the traveling direction F (FIG. 5). However, this support type can be arbitrarily set according to the conveyance conditions, such as sideways. Moreover, as shown in FIG. 4, the workpiece | work 1 is supported by the conveyor 2 and the one side (this example left side) in this floor conveyor attitude | position.
[0017]
FIG. 1 is a diagram showing in principle the operation of the workpiece 1 in the electrodeposition coating process as viewed from the traveling direction F of the conveyor 2. In other words, a first paint tank 20 and a second paint tank 30 are provided opposite to each other on the left and right sides of the conveyor 2 and are filled with paints of colors 1 and 2 having different paint colors.
[0018]
As shown in this figure, the first paint tank 20 and the second paint tank 30 are formed symmetrically with a substantially quarter-circular cross section, and the first paint tank 20 and the second paint tank 30 are combined. Are combined so as to form a substantially semicircular cross-sectional shape, and are adjacent to each other below the conveyor 2. Further, the outer side walls 22 and 32 of the first paint tank 20 and the second paint tank 30 each have an arc shape corresponding to the rotation trajectory of the work 1, and the capacity of the treatment tank is reduced to reduce the amount of paint used. You can save money by doing the minimum necessary.
[0019]
The partition walls 21 and 31 partitioning between the first paint tank 20 and the second paint tank 30 have different heights, and the first paint tank 20 and the second paint tank 30 are stepped. In the present embodiment, the first paint tank 20 side is low and the second paint tank 30 side is high. However, the reverse may be possible.
[0020]
The conveyor 2 is located in the vicinity of the boundary between these two tanks and on the lower first paint tank 20. However, this arrangement can also be arbitrarily set according to the rotation mechanism of the workpiece 1, conditions on the processing tank side, and the like. Moreover, the movable part 4 is provided in the position which becomes above the 1st coating material tank 20 and the 2nd coating material tank 30 among the conveyors 2. FIG.
[0021]
(A) of FIG. 1 shows the workpiece | work attitude | position when it entered into the electrodeposition coating process or was complete | finished, and is a floor conveyor attitude | position in a present Example. That is, this attitude is a basic form before the start of processing or at the end of the process, and is a basic attitude when moving between different processes. Thereafter, when electrodeposition coating is started, the movable portion 4 selectively rotates laterally in either the clockwise direction or the counterclockwise direction.
[0022]
Thereby, it changes to an overhead conveyor attitude | position, and will be in the state of either the state (B) immersed in the 1st coating material tank 20, or the state (C) immersed in the 2nd coating material tank 30. Accordingly, the shapes and arrangement relationships of the first paint tank 20 and the second paint tank 30 are set so that dipping is possible when the work 1 is rotated laterally as shown in B or C above.
[0023]
Next, the operation of this embodiment will be described. As shown in FIG. 1, when the carrier 3 supporting the work 1 in the floor conveyor posture moves onto the first paint tank 20 and the second paint tank 30, the movement is stopped (A), and the work 1 should be painted If the paint color is color 1, the movable part 4 is rotated approximately 180 ° clockwise and submerged in the paint in the first paint tank 20 (B), and if it is color 2, it is approximately 180 ° counterclockwise. It is rotated and immersed in the paint of the second paint tank 30 (C), and dipped with an electrodeposition paint of color 1 or color 2, respectively.
[0024]
Thereafter, when the movable part 4 rotates in the reverse direction, the workpiece 1 rotates in the opposite direction, and then comes out of the first paint tank 20 or the second paint tank 30 onto the liquid surface and then returns to the original position. It becomes a conveyor posture. At this time, since the conveyor 2 is on the first paint tank 20, when the electrodeposition coating is performed with the color 2, the side conveyor posture is maintained above the liquid level at the stage of exiting the second paint tank 30, Drain the paint falling from the workpiece 1. Since the step portion is provided between the first paint tank 20 and the second paint tank 30 at the time of the sagging, there is less possibility that the dripping paint drops and mixes into the adjacent paint tank. When the electrodeposition coating is finished, it is sent to the drying process and further to the subsequent top coating process.
[0025]
As described above, in the electrodeposition coating process, even if the coating color is different from the color 1 or the color 2, the first paint tank 20 or the second paint can be obtained by horizontally rotating the movable part 4 in either the forward or reverse direction. The desired paint color of the paint tank 30 can be selected. Therefore, since workpieces 1 with different paint colors can be mixed and conveyed by a single conveyor 2, it is not necessary to provide a dedicated line for each paint color, and production can be performed on a common line. As well as saving the line installation space and investment. In addition, since it is not necessary to replace each paint color and the workpieces 1 having different paint colors can be mixed and conveyed, there is no occurrence of a switching loss and the efficiency is greatly improved.
[0026]
In addition, when the first paint tank 20 and the second paint tank 30 are arranged side by side in the left and right directions, the length of the entire apparatus can be obviously shortened and the equipment can be made compact compared to the case where these are arranged vertically in the traveling direction. . Therefore, it is advantageous in the case of including a painting process in which any two colors are selected alternatively.
[0027]
Next, a second embodiment will be described with reference to FIGS. As in the previous example, this example also relates to the electrodeposition coating of the painting line on the motorcycle body, and FIG. 6 is a diagram showing the electrodeposition coating method in this example in the same manner as FIG. FIG. 2 is a view similar to FIG. 1 showing in principle the dipping process in this electrodeposition coating process.
[0028]
As apparent from FIG. 6, the first paint tank 20 and the second paint tank 30 are the same as in the previous embodiment, but in this embodiment, the respective processes constituting the first paint tank 20 and the second paint tank 30. The height of the adjacent wall surface of the tank is the same. Further, the conveyor 2 of the present embodiment is located almost immediately above the boundary between the first paint tank 20 and the second paint tank 30.
[0029]
The workpiece 1 is the same as that of the previous embodiment, but is supported upright from the upper surface of the conveyor 2 in the floor conveyor posture, and unlike the case of being supported on one side of the conveyor 2 as in the previous embodiment, the dipping process is performed. The horizontal rotation at the time has a similar locus on either side of the first paint tank 20 or the second paint tank 30.
[0030]
Furthermore, since the work 1 is supported sideways and so many works 1 can be arranged in the traveling direction on the paint tank, a large number of works 1 can be dipped at the same time in the same paint tank. Sometimes, it is immersed in the paint while rotating forward or backward from the front part or the rear part, so that the resistance at the time of appearing from the paint is reduced.
[0031]
The carrier 3 for mounting the workpiece 1 via the support stay 14 is the same in that it horizontally rotates integrally with the movable part 4 of the conveyor 2, but moves on the conveyor 2 in a monorail shape. As the structures of the carrier 3 and the movable portion 4, any appropriate structure can be arbitrarily adopted. Reference numeral 15 in the figure denotes an electrode.
[0032]
In FIG. 7, A in the drawing is a neutral position of the work 1 and forms a floor conveyor posture, and is a basic shape when moving between dipping tanks of other processes adjacent in the traveling direction. Electrodeposition coating is started by lateral rotation in the direction.
[0033]
B and C in the figure are in a dipping state. If the work 1 is rotated clockwise, it will be immersed in the first paint tank 20 on the right side (B), and if it is rotated counterclockwise, it will be on the left side. (C), and the dipping tank can be selected according to the horizontal rotation direction.
[0034]
D in the figure is a state at the end of dipping, and the side conveyor posture in which the workpiece 1 is pulled up above the first paint tank 20 or the second paint tank 30 to be substantially horizontal is maintained for a predetermined time. This allows sufficient sagging of excess paint. At this time, it is more effective if it is slightly tilted, rotated around the axis of the support arm 32, or swung by a small angle.
[0035]
When the workpieces 1 are supported side by side in this way, a large number of workpieces 1 can be processed at the same time, so that the efficiency can be improved and the overall length of the facility does not have to be made very long. Further, if the work 1 is supported at a position directly above the conveyor 2, the horizontal rotation of the work 1 can be made to be the same as the left and right, and the apparatus can be made to be symmetrical, so that the structure can be simplified.
[0036]
Moreover, when the workpiece 1 starts to rotate laterally, it enters the paint tank while starting to descend rapidly, and further moves while swinging, so conventionally, the lowering requiring two actions and the rotation in the paint tank are simultaneously performed. Can be done with one action. Therefore, the time required for processing can be shortened, and the overall processing time can be shortened to increase efficiency. In addition, the structure of the apparatus is simplified and maintenance is facilitated.
[0037]
The present invention is not limited to the above-described embodiments, and various modifications and applications are possible. The target transfer line is not limited to the electrodeposition coating line, and may be used for a coating apparatus by spraying or the like. Furthermore, the object to be painted is not limited to vehicles, and various articles can be used.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating the principle of processing according to a first embodiment. FIG. 2 is a schematic diagram of a coating line to which each embodiment is applied. FIG. 3 is a diagram illustrating a mechanism of a movable part according to the first embodiment. FIG. 4 is a plan view together with its action. FIG. 5 is a diagram showing the movable part from the front in the traveling direction. FIG. 6 is a diagram showing a coating method according to the second embodiment. Figure similar to 1 [Explanation of symbols]
1: Work, 2: Conveyor, 3: Carrier, 4: Movable part, 5: Step motor, 20: First paint tank, 30: Second paint tank

Claims (6)

There are paint execution parts with different paint colors on the left and right sides of one conveyor.
Further, a part of the conveyor that is located in the coating execution unit is a movable part, and when the workpiece guided and moved by the conveyor moves to the movable part, the movable part is arranged in parallel with the moving direction of the workpiece. Rotate around the rotation axis, rotate the workpiece horizontally to rotate to the left or right in a plane perpendicular to the direction of travel , and paint the workpiece to the specified paint color at either the left or right coating execution unit A transport device for multicolor coating, characterized in that. The coating is an electrodeposition coating, the coating execution unit is a dipping paint tank, arranged opposite to the left and right , and the partition walls forming the boundary between both paint tanks are adjacent to and touch each other below the conveyor,
The workpiece is supported by a carrier that moves along the conveyor, moves to the movable part in a floor conveyor posture in a state where it is supported upright above the conveyor, and swings in an arc-shaped locus around the rotation axis by lateral rotation of the movable part. 2. The multicolor coating conveying device according to claim 1, wherein the conveying device for multicolor coating is dipped while changing into an overhead conveyor posture in a state where it enters one of the left and right paint tanks while being moved and is suspended from the conveyor .  3. The multicolor coating conveying apparatus according to claim 2, wherein the workpiece is a motorcycle body and is supported by a carrier that moves along a conveyor in a lateral direction with its front and rear facing left and right.  The workpiece is pulled up when the dipping is finished, stopped by a change in the posture of the side conveyor that is pulled up above the paint tank and supported horizontally to the side of the conveyor, and is maintained by maintaining the side conveyor posture for a predetermined time. Item 3. The multicolor coating conveying apparatus according to Item 2.  The left and right paint tanks are arranged at high and low so that the boundary part is stepped,
The conveyor is placed on the lower paint tank so that the carrier is on the side far from the boundary,
The transport apparatus for multicolor coating according to claim 2, wherein the workpiece moves along a side surface of the conveyor when in a floor conveyor posture. The left and right paint tanks are placed at the same height, and the conveyor is located on the boundary between the left and right paint tanks,
3. The multicolor coating conveying apparatus according to claim 2, wherein the workpiece moves along the upper surface of the conveyor when in a floor conveyor posture.

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