JP2001199537A - Different type work mixing and conveying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously convey works of different materials while treating corresponding to respective different materials, in a different materials mixing line. SOLUTION: In a pretreatment process positioned ahead of a common coating both, a pretreatment tank 20 for resin and a pretreatment tank 30 for metal are arranged across a conveyor 2 so as to face to each other. The heights of the pretreatment tank 20 and the pretreatment rank 30 are different from each other. The conveyor 2 passes on the boundary parts of the pretreatment tank 20 and the pretreatment tank 30, a part of it serves as a movable part at the part, the carrier 3 and a work 1 supported by it are oscillated together with the movable part to the right or left side of the conveyor 2 and sunk in the pretreatment tank 20 or the pretreatment tank 30, and dipping for resin or metal corresponding to constituent materials is performed as the pretreatment of coating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a resin and a metal,
The present invention relates to a transfer device suitable for a line for mixing different kinds of workpieces having different processing conditions.

[0002]

2. Description of the Related Art In the case of a coating line in which steps are successively performed in the order of a pretreatment step, a coating step, and a drying step, processing conditions of the pretreatment step and the drying step differ depending on whether a work is made of resin or metal. For this reason, dedicated lines for resin work and metal work are provided, or the same line is switched for each material and processed.

[0003]

In the case where a dedicated line is provided for each of the above-mentioned different materials, the number of facilities is doubled, so that the installation space and investment increase. Further, when switching is performed for each material, it takes a long time to perform switching, such as cleaning of the apparatus (pretreatment step) and temperature management (drying step) at the time of switching, so that a switching loss occurs. Moreover, this loss is large. To reduce this loss, it is necessary to perform lot production, but if it is produced in lots, synchronous production with other departments becomes impossible. An object of the present invention is to solve such a problem.

[0004]

According to a first aspect of the present invention, there is provided an apparatus for transporting a plurality of different works having different processing conditions to a processing section in a mixed state. , Dedicated processing units corresponding to different types of work are provided on both sides of the conveyor, and the work moving on the conveyor is selectively laterally rotated to the left or right in the traveling direction corresponding to the processing unit, and each work is processed under the processing conditions. The processing is performed according to the following.

[0005] A second invention is characterized in that, in the first invention, the treatment is a pretreatment step prior to a painting step in a painting line.

A third invention is characterized in that, in the first invention, the treatment is a drying step following a painting step in a painting line.

According to a fourth aspect of the present invention, in the first aspect, the processing section is a dipping tank, and the heights of adjacent dipping tanks are arranged stepwise. Work mixing and conveying equipment.

A fifth aspect of the present invention is an apparatus for transporting a plurality of different types of workpieces having different processing conditions to a processing section in a mixed state, wherein dedicated processing sections corresponding to different types of workpieces are provided on both sides of the conveyor and moved on the conveyor. The workpiece to be processed is selectively rotated laterally to the left or right side in the traveling direction according to the processing conditions and processed by one of the left and right dedicated processing units, or when the processing conditions do not match any of these dedicated processing units. In this case, the vehicle is configured to pass through without being rotated laterally.

[0009]

According to the first aspect of the present invention, a dedicated processing section is provided for each different kind of work with the conveyor interposed therebetween, so that the work moving on the conveyor moves to the left or right side according to the processing conditions. By swinging, appropriate processing can be performed by a processing unit suitable for the work. Therefore, it is not necessary to provide a dedicated line for each work having different processing conditions such as materials,
Since it can be produced on a common line, installation space and investment can be saved. In addition, since different types of workpieces can be conveyed continuously without having to perform switching production for different types of workpieces, there is no need for switching loss and there is no need to perform lot production, thus enabling synchronous production with other departments.

According to the second aspect of the present invention, in the case of the pre-treatment step in the coating line, the work content is different depending on whether the work is made of resin or metal, but even in this case, works of different materials are mixed. Can be conveyed and then painted on a common line, so that the painting line can be simplified.

According to the third aspect of the present invention, similarly, in the case of the drying step following the coating, the drying temperature is different between resin and metal, but the resin or metal workpieces having different processing temperatures are mixed. Can be produced on a single line after painting, and the painting line can be simplified.

[0012] According to the fourth aspect, the dedicated processing unit includes 2
When two dipping tanks are provided and dipping is performed, the height of adjacent dipping tanks is arranged stepwise, so that the processing liquid dripping after the dipping processing does not easily mix into other adjacent dipping tanks.

According to the fifth invention, in addition to the selection of the left and right processing units as in the first invention, a work which does not correspond to the processing conditions in the left or right dedicated processing unit cancels the processing. Can be passed through.
Therefore, the number of works to be conveyed can be two kinds corresponding to the left and right dedicated processing units and a total of three kinds other than these, and the number of different kinds of works that can be processed simultaneously can be increased.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment applied to a vehicle body painting line of a motorcycle will be described below with reference to the drawings. FIG. 2 is a process diagram of the coating line. The coating process includes three steps of pretreatment, coating, and drying, and a work 1 which is a body of a motorcycle extends linearly between these steps. It moves while being supported by the conveyor 2.

In the pretreatment step, the pretreatment section a1 for resin and the pretreatment section a2 for metal
Are arranged opposite to each other, and a single painting booth b is provided on the conveyor 2 in the subsequent painting process. In the drying step following the coating booth b, the resin drying furnace c1 and the metal drying furnace c2 are arranged to face each other with the conveyor 2 interposed therebetween.

Next, the work transfer mechanism will be described. FIG. 3 is a side view in which a movable portion provided on a part of the conveyor 2 is partially cut out with respect to a support portion of the work 1;
FIG. 4 is a plan view showing the operation, and FIG.
It is a figure shown from the front.

As apparent from these figures, the conveyor 2 has a rectangular cylindrical shape and has a movable part 4 in a part of its length. The movable part 4 is freely rotatable by a step motor 5. The step motor 5 is fixed in the conveyor 2 on one side of the movable part 4, and the rotating shaft 6 passes through the movable part 4 to the conveyor 2 on the other side. It extends here and is fixed at the tip to the vertical wall 8. The movable part 4 rotates synchronously with the rotating shaft 6 by being able to rotate integrally with the vertical wall 7 and the rotating shaft 6.

The stepping motor 5 can rotate in both forward and reverse directions, and the amount of rotation of the rotating shaft 6 as its output corresponds to the rotating direction and the rotating angle of the work 1 supported on the carrier 3. Is rotated by approximately 90 ° in any of the rotation directions, the work 1 is in the side conveyor posture, and is approximately 180 °.
If it rotates, it will be in the overhead conveyor posture. If it is reversed from this overhead conveyor posture position, it becomes the side conveyor posture again and returns to the original floor conveyor posture.

At this time, by rotating the step motor 5 at a smaller angle, the work 1 can be held in a state where the work 1 is tilted to an intermediate position. Can swing right and left with small swing width. The rotation control of this step motor 5 is as follows.
It 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.

The carrier 3 is connected so as to move along one side surface of each of the conveyor 2 and the movable section 4, and the slits 9 formed continuously on the side surfaces in the length direction form the conveyor 2 and the movable section 4. The protrusions 10 of the carrier 3 protrude into the inside, and the protrusions 10 support rollers 11 provided at four front and rear, upper and lower corners.

Thus, the carrier 3 is movable by the rollers 11 rolling inside the conveyor 2 and the movable section 4, and is moved in the traveling direction F by appropriate driving means (not shown). From one side of the carrier 3, a horizontal arm 12
The tip 13 is bent at a substantially right angle, and the work 1 is supported here via a support stay 14.

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 as to extend in the forward and backward directions F. 5). However, this support type can be arbitrarily set according to the transfer conditions such as the horizontal orientation. Further, as shown in FIG. 4, the work 1 is supported on one side (in the present embodiment, on the left side) of the conveyor 2 and the movable section 4 in this floor conveyor posture.

FIG. 1 is a view showing in principle the operation of the workpiece 1 in the pre-processing step as viewed from the traveling direction F of the conveyor 2. That is, a resin pretreatment tank 20 and a metal pretreatment tank 30 are provided in the resin pretreatment tank a1 and the metal pretreatment tank a2 disposed on the left and right sides of the conveyor 2 so as to face each other. It is filled with processing solutions of different compositions depending on the material.

As shown in this figure, the resin pretreatment tank 20
The pretreatment tank 30 for metal and the metal pretreatment tank 30 are each formed in a symmetrical shape with a substantially 1/4 circular cross section, and the pretreatment tank 20 for resin and the pretreatment tank 30 for metal are combined to form a substantially semicircular cross section. And are adjacent to each other below the conveyor 2. In addition, the resin pretreatment tank 20 and the metal pretreatment tank 30
The outer side walls 22 and 32 each have an arc shape corresponding to the rotation locus of the work 1 to reduce the capacity of the processing tank.
Savings can be achieved by minimizing the amount of processing solution used.

Pretreatment tank 20 for resin and pretreatment tank 30 for metal
The height of the partition walls 21 and 31 that define the space between the pretreatment tanks 20 and 31 is different, and the pretreatment tank 20 for resin and the pretreatment tank 30 for metal have a stepped shape. In this embodiment, the resin pretreatment tank 20 side is low and the metal pretreatment tank 30 side is high. However, it may be reversed.

The conveyor 2 is located near the boundary between the two tanks and above the lower resin pretreatment tank 20. However,
This arrangement can also be set arbitrarily according to the rotation mechanism of the work 1 and the conditions on the processing tank side. The movable part 4 is provided on the conveyor 2 at a position above the resin pretreatment tank 20 and the metal pretreatment tank 30. Although not shown, the movable part is provided on the conveyor 2 even in the drying step.

FIG. 1A shows the posture of the workpiece when the preprocessing step is started or completed, and in this embodiment, the workpiece is in the floor conveyor posture. That is, this posture is a basic form before or at the end of processing, and is a principle posture when moving between different processes. Thereafter, when the pre-processing is started, the movable unit 4 is selectively laterally rotated in a clockwise direction or a counterclockwise direction.

As a result, the state changes to the overhead conveyor posture, and the state (B) of being immersed in the resin pretreatment tank 20 is obtained.
Alternatively, the state (C) is immersed in the metal pretreatment tank 30. Therefore, the shapes, arrangements, and the like of the resin pretreatment tank 20 and the metal pretreatment tank 30 are set so that the dipping process can be performed when the workpiece 1 rotates laterally as shown in the above (B) or (C). You.

Next, the operation of this embodiment will be described. As shown in FIG. 1, a carrier 3 supporting a work 1 in a floor conveyor posture is composed of a resin pretreatment tank 20 and a metal pretreatment tank 3.
When the workpiece 1 is made of resin, the movable part 4 rotates clockwise approximately 180 ° and sinks into the processing liquid in the resin pretreatment tank 20 (B). ) If it is made of metal, it is rotated approximately 180 ° in the counterclockwise direction and immersed in the processing solution of the metal pretreatment tank 30 (C), and a dedicated composition adjusted as a pretreatment for resin or metal, respectively. Dipping is performed with the above processing solution.

Thereafter, when the movable portion 4 rotates in the reverse direction, the work 1 rotates in the lateral direction in the reverse direction, and the resin pretreatment tank 20 is rotated.
Alternatively, it comes out of the metal pretreatment tank 30 onto the treatment liquid surface and returns to the original position soon, and assumes the basic floor conveyor posture. At this time, since the conveyor 2 is on the resin pretreatment tank 20, when the metal pretreatment is performed, the side conveyor posture is maintained above the processing liquid surface when the metal pretreatment tank 30 is out of the metal pretreatment tank 30. Then, the processing liquid falling from the dipped workpiece 1 is dripped off. When cutting this sauce,
Since the step portion is provided between the resin pre-treatment tank 20 and the metal pre-treatment tank 30, the danger of dripping of the treatment liquid into the adjacent treatment tank is reduced.

When the pre-processing is completed, a common coating booth b (FIG. 2) is entered, and a common coating of a resin work and a metal work is performed. Thereby, it is divided into either the resin drying oven c1 or the metal drying oven c2 depending on the constituent material of the work 1 and dried. At this time, about 80 in the resin drying furnace c1.
℃, drying at about 140 ℃ in the metal drying furnace c2,
It is processed under the optimal temperature conditions according to the material.

As described above, in the pre-processing step in the coating line, even if the work 1 is made of resin or metal and the processing content is different, the movable unit 4 is rotated in either the forward or reverse direction. Thereby, the processing suitable for the material of the work 1 in the resin pretreatment tank 20 or the metal pretreatment tank 30 can be selectively performed. Further, when the material-specific processing is not required as in the painting step, the common processing can be arbitrarily performed by not providing the movable portion 4 or disabling the movable portion 4 in this portion.

Therefore, regardless of whether the material of the work 1 is made of resin or metal, the work 1 of a different material can be conveyed in a mixed manner throughout the coating line. Therefore, it is necessary to provide a dedicated line for each material. Since a single coating line can be used for production, a single painting line can be used to simplify the entire system, and installation space and investment for the line can be saved. In addition, since different materials can be transported continuously without the need to switch production for each material, there is no switching loss and there is no need to produce lots, so that synchronous production with other departments is possible.

In addition, when the resin pretreatment tank 20 and the metal pretreatment tank 30 are arranged side by side horizontally, the length of the entire apparatus is clearly reduced as compared with the case where these are arranged vertically in the traveling direction. Equipment can be made compact. Therefore, it is advantageous in the case where the same type and an alternative processing step are included.

Next, a second embodiment will be described with reference to FIGS. This embodiment also relates to the pre-processing of the painting line for the motorcycle body as in the previous embodiment. FIG. 6 is a perspective view of the pre-processing device, and FIG. 7 is a diagram illustrating the dipping process in this pre-processing process. FIG. 2 is a view similar to FIG. As is apparent from these figures, the pretreatment tank 20 for resin and the pretreatment tank 30 for metal are disposed on the left and right sides of the conveyor 2 so as to face each other.

As shown in FIG. 6, a degreasing tank 25, a chemical conversion tank 26, and a washing tank 27 as resin pretreatment tanks 20 are arranged in series along the traveling direction F of the conveyor 2, and A degreasing tank 35, a chemical conversion tank 36, and a washing tank 37, which are the metal processing tanks 30, are arranged in series along the traveling direction F of the conveyor 2 so as to face each other.

The conveyor 2 is located substantially immediately above the boundary between the resin pretreatment tank 20 and the metal pretreatment tank 30. Work 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 is different from that supported on one side of the conveyor 2 as in the previous embodiment. The lateral rotation has the same locus on either side of the resin pretreatment tank 20 or the metal pretreatment tank 30.

The workpieces 1 are supported horizontally, and a large number of workpieces 1 can be dipped in the same processing tank at the same time. When the dipping processing is performed, the workpieces 1 are rotated in the processing liquid while rotating from the front or the rear. To be submerged,
The resistance when appearing and disappearing from the processing liquid is reduced.

The carrier 3 for mounting the work 1 is the same as the movable part 4 of the conveyor 2 in the horizontal rotation, but moves on the conveyor 2 in a monorail shape. The structure of the carrier 3 and the movable portion 4 may be any appropriate structure.

FIG. 7 shows a resin pretreatment tank 20 and a metal pretreatment tank 30 which are schematically shown as representatives of the respective treatment tanks.
It is a figure which shows in principle about the dipping process using. As shown in this figure, the pretreatment tank 20 for resin and the pretreatment tank 30 for metal are the same as in the previous embodiment. However, in this embodiment, the heights of the adjacent wall surfaces of the processing tanks constituting the resin pretreatment tank 20 and the metal pretreatment tank 30 are the same.

A in the figure is a neutral position of the work 1, which is in a floor conveyor posture, and is a basic form when moving between adjacent dipping tanks (see FIG. 6) in the front-rear direction. The pre-processing by dipping is started by laterally rotating in any direction.

B and C in the figure are in a dipping process, and when the work 1 is rotated clockwise, it is immersed in the resin pretreatment tank 20 on the right side (B) and counterclockwise. If it rotates sideways, it will sink into the metal pretreatment tank 30 on the left side (C), and the dipping tank can be selected according to the horizontal rotation direction.

D in the drawing is a state at the end of the dipping process, and the side conveyor posture in which the support arm 38 is set substantially horizontal and the work 1 is pulled up above the resin pretreatment tank 20 or the metal pretreatment tank 30. By maintaining this posture for a predetermined period of time, it is possible to sufficiently remove the excessively attached processing liquid. At this time, it is more effective to slightly incline, rotate around the axis of the support arm 38, or swing by a small angle.

As described above, when the works 1 are supported side by side, a large number of works 1 can be processed at the same time, so that the efficiency can be improved, and the total length of the equipment does not need to be too long. Further, when the work 1 is supported at a position directly above the conveyor 2, the work 1 can be laterally rotated left and right and the apparatus can be symmetrical, so that the structure can be simplified.

Further, the conveyor 2 is provided with a plurality of processing tanks (2
5, 26, 27, 35, 36, 37) in a straight line in the same horizontal plane, so that the conveyor itself is bent and disposed in a vertical direction above the processing tank. Reduce the time required to move between tanks. Further, when the work 1 starts the lateral rotation, the work 1 enters the processing tank while rapidly descending, and moves while swinging in the processing tank. Therefore, the lowering and the rotation in the processing tank which conventionally required two actions are simultaneously performed. You can do it in one action. Therefore, the time required for the processing can be shortened, and the overall processing time can be shortened to increase the efficiency. In addition, the structure of the device is simplified and maintenance is facilitated.

The present invention is not limited to the above-described embodiments, but can be variously modified and applied. The target transport line is not limited to the painting line, but may be applied to the production / assembly line of vehicle bodies and other articles. Applicable. The processing to be performed is not limited to the dipping processing, but includes processing other than surface processing such as assembly and processing. Furthermore, the target of the work is not limited to dissimilar materials,
The combination may not be the same, and may be, for example, a combination of different kinds of articles such as a combination of a metal body and a resin body interior / exterior part.

[Brief description of the drawings]

FIG. 1 is a principle explanatory diagram of a process according to a first embodiment.

FIG. 2 is a process diagram of a coating line to which each embodiment is applied.

FIG. 3 is a diagram showing a mechanism of a movable unit according to the first embodiment.

FIG. 4 is a plan view showing the operation.

FIG. 5 is a view showing the movable section from the front in the traveling direction.

FIG. 6 is a perspective view of an apparatus according to a second embodiment.

FIG. 7 is a view similar to FIG. 1 according to a second embodiment.

[Explanation of symbols]

1: Workpiece, 2: Conveyor, 3: Carrier, 4: Moving part, 5: Step motor, 20: Pretreatment tank for resin, 3
0: Pretreatment tank for metal

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B62D 65/18 B62D 65/18 B // B05D 1/18 B05D 1/18 3/00 3/00 Z

Claims (5)

[Claims] 1. An apparatus for transporting a plurality of different workpieces having different processing conditions to a processing section in a mixed state, wherein a dedicated processing section corresponding to each different workpiece is provided on both sides of the conveyor.
Mixing different types of workpieces, characterized in that the workpieces moving on the conveyor are selectively laterally rotated to the left or right in the direction of travel in accordance with the processing section, and each workpiece is processed according to the processing conditions Transport device. 2. The apparatus according to claim 1, wherein the processing is a pre-processing step prior to a coating step in a coating line. 3. The apparatus according to claim 1, wherein the processing is a drying step following a coating step in a coating line. 4. The apparatus for mixing and transporting different kinds of workpieces according to claim 1, wherein the processing section is a dipping tank, and the heights of adjacent dipping tanks are arranged stepwise. 5. An apparatus for conveying a plurality of different workpieces having different processing conditions to a processing section in a mixed state, wherein a dedicated processing section corresponding to each different workpiece is provided on both sides of the conveyor.
According to the processing conditions, the workpiece moving on the conveyor is selectively laterally rotated to the left or right in the traveling direction and processed by one of the left and right dedicated processing units, or processed by any of these dedicated processing units. A heterogeneous work mixing / transporting apparatus characterized in that when the conditions do not match, the workpiece is passed without being rotated laterally.