JPH0657327B2 - Painting process equipment using hanging beams - Google Patents

Description

Description: [Object of the invention] (Field of industrial application) The present invention relates to a coating process apparatus for continuously coating an object to be coated and a suspension beam used therefor, and particularly to an electrostatic coating process for building materials. It is suitable for a device.

(Prior Art) It is well known that metal building materials such as extruded aluminum alloy profiles and panel materials are widely used. This metal building material is also colored. In recent years, in particular, diversification of colors has been promoted, and products having various colors have appeared. In the case of aluminum alloy shaped materials, the electrolytic coloring method using a metal salt bath has been used for coloring, but painting is also being considered to cope with the diversification of colors.

Many building materials are narrow and long, and there are also wide materials such as curtain walls. In order to process these efficiently, in the case of the conventional electrolytic coloring, a large number of building materials are hung on a hanging beam, and both ends of the hanging beam are supported and carried by a moving crane. This crane can also move the hanging beam up and down,
The suspended building material is lowered into the tank to be treated and dipped, and after the treatment is completed, it is pulled up and conveyed to the next tank. That is, conventionally, the suspension beam was moved in the direction perpendicular to the longitudinal direction of the suspension beam while keeping the suspension beam parallel.

However, in the case of coating, apart from the case of the coating method of immersing in the paint, if it is applied by air spray or brush coating method, it is desirable to coat during transportation for efficient and continuous coating. , The suspension beam must be transported in the longitudinal direction, and the building material being transported must be sprayed from the side.

In the method of continuously coating the building material hung on the suspension beam, for example, while attaching a suspension beam having a length of 7 to 10 m in the longitudinal direction, the step of attaching the object to be coated to the suspension beam, the degreasing step, the coating An electrostatic coating method is used in which the processing of each step such as base treatment, drying, painting, baking, cooling, and removal of the object to be coated from the hanging beam is performed in sequence, but in the past, the equipment was straight line. Were lined up. The length reaches 100-250m in total. Therefore, there is a problem that the site area of the factory must be large, and since the work of attaching and detaching the object to be painted to the hanging beam is performed a long distance before and after the whole process, many workers are required. There is a problem that it is necessary.

On the other hand, for example, in the painting process of automobiles, there is one in which a conveyor for conveying an object to be coated is connected in a meandering manner as seen in JP-A-62-250958. However, in this case, since the single conveyor moves while meandering, the conveyors are conveyed at the same conveying speed in each step. Although the optimum processing speed is usually different for each processing step, in order to achieve the same speed, it was inevitable to compromise at each halfway level. In addition, it takes a lot of space to change the direction of a long suspension beam that suspends many building materials during transportation, and it is difficult to continuously process each painting process during this period, which is a waste to the factory. More space.

(Problems to be Solved by the Invention) The present invention has been made in order to solve such problems, and a coating process device capable of efficiently coating and efficiently using a factory site The purpose is to provide a suspension beam for use therein.

Therefore, according to the present invention, at least the coating line for applying the paint and the baking line for baking the applied paint are separated, and the suspension beams in the line are separately conveyed. It is based on what is done by means. That is, the first transfer means for linearly moving the suspension beam in the coating line for applying the paint to the object suspended on the suspension beam and the second transfer means for moving the suspension beam on the baking line are mutually Be independent,
While arranging the second conveying means in parallel with the first conveying means,
A U-turn is carried in the opposite direction to the carrying direction of the first carrying means.

Therefore, according to the present invention, the first and second transfer means are configured as described above, and the transfer of the first transfer means is further performed in the second stockyard provided so as to connect the first transfer means and the second transfer means. Second transfer means for transferring the suspension beam from the end point to the transfer start point of the second transfer means is provided, and the second transfer means is provided.
The transfer means is provided at the front and rear ends of the transfer means at positions where the suspension beam is transferred from the first transfer means to the second transfer means and at positions where the suspension beam is transferred from the second transfer means to the second transfer means. It has a substantially U-shaped process line configuration.

In order to make these configurations function, a transfer unit including a traveling roller and a dock pin as main elements is arranged above the hanging beam for suspending the object to be coated, and the transportation and the traveling are smoothly performed. The number of transfer units depends on the length of the suspension beam.
~ 3 bodies are arranged, and in that case, the dock pin may be provided only in one of them. Further, it is free to attach an identification display plate for changing the color of the paint or a coating distance detecting plate to the hanging beam, if desired.

Further, in order to perform a pretreatment for coating and to transport the suspension beam after coating, the transport start point of the first transport means and the transport end point of the second transport means are also included in the same transport path, and It is desirable to provide a transfer crane means for transferring the suspension beam in parallel with the two transfer means and to make a substantially P-shaped process line configuration. In that case as well, in order to carry the suspension beam carried by the carrying crane means from the first stockyard where the hanging beam is temporarily placed to the first carrying means and from the second carrying means to the carrying crane means, The transfer means for transferring the suspension beam to the third stockyard, which is to be placed in a general manner, and the first and third transfer means connected to the transfer means for transferring the suspension beam in each stockyard, respectively. Is desirable.

Further, the transport crane means supports both ends of the suspension beam, moves in a direction perpendicular to the longitudinal direction of the suspension beam, moves the suspension beam up and down, and can travel while holding the suspension beam. A crane may be used, and in that case, the pretreatment process, loading of the hanging beam on the crane in the first transfer means and the third transfer means, and the loading / unloading work area are all in the same area for one crane. It is desirable for sharing. In this case, the type of crane is not limited, but for example, Japanese Utility Model Publication No. 57-57111 or Japanese Patent Application Laid-Open No. 62-40
A crane such as that disclosed in Japanese Patent Publication No. 399 can be used.

Further, it is desirable that the first transporting means and the second transporting means have the same kind of rail configuration for moving the suspension beam. That is, the transportation rail for transporting and energizing the suspension beam is provided in the upper stage, and the traveling rail for traveling the suspension beam under the load of the suspension beam is provided in the lower stage. In that case, the traveling rail is of a length corresponding to the coating line length or the baking line length, but the transport rail is not limited to each line length as long as the suspension beam can travel the required length on the traveling line. . Also, it is not necessary for the whole to be a straight line,
It may be looped if desired.

In the traveling rail, in order to transfer the suspension beam to another transportation means or to take it from the transportation means to each transportation means, the portion where each transportation means is located in the vicinity of the entrance and exit of the coating line and the baking line is connected to the transportation unit of the suspension beam. The rail opening is cut according to the number of attachments and the attachment interval to separate the rail opening from other portions, and the two slide rail members facing each other are moved toward and away from each other. It is desirable to dispose a rail opening / closing means so that the suspension beam can be detached from the traveling rail or placed on the traveling rail.

Furthermore, by using the rail for the first and second transporting means,
Also, in the case where the end portion of the traveling rail is provided with a portion that is opened and closed by the rail opening and closing means, from the transfer means to the transfer means,
On the contrary, the transfer means for transferring the suspended beam from the transfer means to the transport means includes a beam holding part for vertically moving a mounting part for mounting one end of the suspended beam and a moving part for horizontally moving the beam holding part. It is preferable that two transfer machines are provided in parallel at the lower position interlocking with the rail opening / closing means, and they are connected so as to cooperate with each other. Incidentally, the number of these means attached corresponds to the number of the transfer units attached to the suspension beam, and it is a mode in which two bodies are usually set as one set.

(Operation) The first transport means and the second transport means are configured by a parallel two-stage rail system. Then, the electrostatic coating means for applying the paint is arranged in the coating line of the first conveying means, and the object to be coated is hung on the suspension beam conveyed by the first conveying means. In the meantime, the paint is applied to the surface of the object to be coated. A transfer means is arranged at the end point of the first transport means, and the suspension beam is transferred to the transfer means in this posture by the transfer means. The suspension beam is placed on the second transfer unit by the transfer unit, and is transferred to the transfer start point of the second transfer unit by the second transfer unit. By adjusting the transfer speed by the transfer means, the installation location functions as the second stockyard. Similarly, a transfer means is provided at the rear end of the second transfer means, so that the suspension beam is placed on the second transfer means. The carrying direction of the second carrying means is opposite to that of the first carrying means. Therefore, the suspension beam is transported so as to return to the original direction. During this time, the paint is baked by the baking means, and the painting process is completed.

That is, in the present invention, the hanging beam is transported between the main lines in a substantially U-shape. Therefore, it is possible to reduce the process length to about half as compared with the conventional one in which the whole is moved in a straight line. Further, since the respective conveying means are independent of each other, the respective conveying speeds can be adjusted according to the respective optimum conditions, and the respective steps can be processed under the conditions capable of obtaining the best quality. . Further, it is necessary to have a setting time after the painting work, but the transfer time from the first transfer means to the second transfer means by the second transfer means can be applied to that time, and the time can be shortened.

Furthermore, since the transport start point of the first transport means and the transport end point of the second transport means are close to each other, it is possible to easily link with the pretreatment process and the like.

That is, when the transport crane means is provided so as to have a substantially P-type process line configuration so as to include the transport start point of the first transport means and the transport end point of the second transport means in the transport path, the pretreatment is further performed in the transport path. It is possible to arrange a tank, and it is possible to carry out a series of operations from pretreatment to painting and baking. In addition, by providing the above-mentioned transport crane means, transporting for pretreatment such as degreasing treatment, coating base treatment or drying treatment, etc., and finishing the finished product on the tank during the treatment in the pretreatment tank of the object to be coated. It can be carried while being held and transported to the work yard. Furthermore, since the work of removing the product from the hanging beam can be performed concurrently in parallel, efficient operation can be performed.

(Example) FIG. 1 is a coating process apparatus of one example, specifically for coating a building material of an aluminum alloy, using a room temperature curing type coating as an undercoat and a thermosetting coating as an overcoat. FIG. 3 is a layout view of a coating process device that is used. At each coating booth, the entire surface is applied by spray painting with a spray painting gun that moves up and down from the left and right.

In this embodiment, the first transfer means 1 and the second transfer means 2 are arranged separately in parallel, and the second transfer means 3 is connected to the second stockyard B so as to connect one ends of both transfer means. On the side opposite to the side on which the second transfer means 3 is arranged, the transfer start point 1A and the second transfer point 1A of the first transfer means 1 are arranged.
The transport crane means 4 is arranged so as to intersect the transport end point 2B of the transport means 2.

The transport crane means 4 is a portal crane 11 of the same kind as that used to move the hanging beam that suspends the profile when performing the surface treatment of the profile, and the upper side surface such as the pretreatment tank. It is configured by rails 12 and 12 that are installed side by side and a moving means that makes a crane 11 (not shown) self-propelled, and holds both ends of the hanging beam 20 to carry them in parallel and, at the same time, raises and lowers the hanging beam. It can be done. In short, the transfer crane means 4 may be of any operation type as long as it can move up and down while holding both ends of the suspension beam and can move in parallel.

Between the rails 12 and 12, a hanging beam 20 having an unpainted object clamped at the left end in the drawing is conveyed by a crane 11.
There is a work yard 13 for mounting on the vehicle, or for unloading the hanging beam 20 on which the painted object is hung from the crane 11, and on the right side thereof is a degreasing tank 14 with a caustic soda solution, a washing tank 15, A coating base film treatment tank 16 using a chromium oxide film treatment solution, a water washing tank 15, and a draining and drying oven 17 are arranged in series, and the suspension beam 20 for which pretreatment has been completed is temporarily retained in front of it. One stock yard A is provided.

The suspension beam 20 is mainly composed of a square bar 21 having a rhombic cross section as shown in FIG. 2, for example.
2 is attached. These are made of conductive material,
A positive potential for electrostatic coating is applied through the chain conveyor of the transfer rail. A plurality of holes 23 are formed in the locking plate 22, and a hanger 24 for hanging an object to be coated (not shown) is attached to the holes 23. The receiving bases 25, 25 are fixed to both ends of the square member 21, and hooking pins 26, 26 are attached to the outer sides thereof. The hooking pins 26, 26 are provided to stabilize the hanging beam 20 when the hanging beam 20 is transported and lifted by the crane 11. These structures themselves are not particularly different from the suspension beams used when electrolytically coloring the conventional shape members.

In addition to the above-described configuration, the suspension beam 20 of this embodiment is provided with transfer units 27, 27 including rollers on the side opposite to the side on which the article to be coated is suspended, that is, on the upper side in use, as shown in the figure. The number of transfer units is not limited to two, and an appropriate number may be selected according to the length of the suspension beam. In that case, a required number of rail opening / closing means are provided according to the number of the transfer units 27 mounted.

A first transfer means 18 and a transfer means 19 are arranged in the first stockyard A. The first transfer means 18 is composed of two chain conveyors 18a with top rollers arranged in parallel so that the receiving bases 25, 25 on both sides of the suspension beam 20 are placed. The suspension beam 20 conveyed by the crane 11 from the drying furnace 17 is once loaded on the first transfer means 18. This first transfer means 1
No. 8 is operated so as to advance the suspension beam according to the line speed of the coating line, during which cooling after drying is performed and a stock function corresponding to the advance speed is performed. The suspension beams 20 temporarily placed in the first stockyard A are provided on both outer sides of the tip of the conveyor 18a.
Two transfer machines 19a, 19a constituting the transfer means 19 transferred to the transport means 1 are arranged in parallel.

As shown in FIG. 3, each transfer machine 19a can move forward and backward as well as move up and down the mounting table 33 on which the ends of the suspension beam 20 are mounted by the cylinder bodies 31, 32 such as two air cylinders and electric cylinders. It has a structure. Cylinder body 3
1 is for forward and backward movement, and the pedestal 3 is attached to the tip of the piston rod.
4 is attached. Further, the cylinder body 32 is attached to a pedestal 34 for raising and lowering for delivering a suspension beam to a slide rail member described later.

In order to guide the pedestal 34 forward and backward, the sliding body 35
Is attached and the cylinder body 31 is exteriorly mounted on it, and this sliding body 35 is inserted between the guide rollers 37, 37 mounted above and below in the frame 36, and reciprocates between the guide rollers. Has become. This is to stabilize and move forward and backward.

The cylinder body 31 is attached to the outside of the frame 36, and its piston rod is connected to the pedestal 34 by an L-shaped angle member. The cylinder body 32 is fixed to the pedestal 34 as described above, and the mounting table 33 is attached to the piston rod thereof. The mounting table 33 is moved up and down by this cylinder body 32, and a rod-shaped sliding body 39 is attached to the mounting table 33 for guiding the mounting table 33.
4 is used as a guide for raising and lowering the mounting table 33 through a hole (not shown).

The transfer means 19 is a transfer start point 1A of the first transfer means 1 at the tip of the transfer means 18 of the first stockyard A in FIG.
It is installed in the vicinity of the
The same thing is installed near the transport end point 1B of the transport means 1, the transport start point 2A of the second transport means 2 and the transport end point 2B of the second transport means 2.

As shown in FIG. 4, the first conveying means 1 has rail members 44, 44 having a U-shaped cross-sectional shape in which one end sides of upper and lower parallel arms 41, 42 are connected by a connecting member 43, and their open portions are provided. It is composed of a traveling rail 45 arranged to face each other and a trolley chain conveyor 47 moving inside a conveying rail 46 arranged above the traveling rail 45. This conveyor 47
As shown in FIG. 1, from the transportation start point 1A to the transportation end point 1B, the traveling rail 45 is allowed to travel in a straight line,
Other than that, the loop is formed as a whole by deviating from the position of the traveling rail 45.

In the case of the present embodiment using the above-mentioned conveying means, the transfer units 27, 27 of the suspension beam 20 described above are paired to travel on the arm 42 of the two rail members 44 as shown in FIGS. 4 and 5. Two pairs of rollers 51 are provided at the front and the rear, and a side roller 52 is provided between the pair of rollers 51 to be inserted between the rail members 44, 44, and as shown in FIG. It has a shape having a dock pin 53 that protrudes upward from the traveling rail 45 when the roller 51 is inserted in. In addition, the two transfer units 27, 27
Even if either one of them is not provided with a dock pin, the operation will not be hindered.

The trolley chain conveyor 47 of the first transfer means 1 is provided with a conveyor dock 54 for hooking the dock pin 53 to transfer the hanging beam 20. The dock mounting portion 55 in which the conveyor dock 54 in this chain is installed rotates inside the transport rail 46 and advances 2
A guide roller 56 composed of individual rollers is attached while the two sets of chains 47 are cut at regular intervals, and a holding roller 57 that rotates in a horizontal state is attached between the guide rollers. The conveyor dock 54 is swingably attached to a support plate 58 commonly attached to the attachment shaft of one of the guide rollers 56 of the dock attachment portion 55.

The conveyor dock 54 has a tip portion 54a shaped like a hook, and the tip portion 53a of the dock pin 53 is hooked by the hook-shaped tip portion 54a to convey the hanging beam 20. That is, when the conveyor dock 54 is hooked on the dock pin 53, it is pushed by the movement of the chain conveyor 47 and the suspension beam 20 is advanced. The roller 51 rotates to move along the traveling rail 45. Side roller 52
Is inserted between both rail members 44, 44, it is possible to reduce the sway of the suspension beam 20 during transportation and the object to be coated hung by the suspension beam 20.

Further, at the carrying end point 1B of the first carrying means 1, the conveyor dock 54 is rotated by the dock opening plate to release the hooking with the dock pin 53 and to prevent the hanging beam from further advancing.

As shown in FIG. 1, each step of the coating line is arranged in the transport path of the first transport means. In this embodiment, which uses a room temperature curing type undercoat paint, the steps of undercoating, fixing, overcoating and correction coating are arranged as shown in the figure. These coating steps are not limited to these, and each step required for them is additionally arranged depending on the type of coating material and expected coating film characteristics. Note that the correction coating means a process in which an operator visually corrects uneven coating.

In order to improve the coating efficiency, this embodiment adopts an electrostatic coating method. Therefore, by applying a negative potential to the coating gun and grounding the chain conveyor side of the transport rail to the coating gun side, A positive electric circuit is provided.

Further, prior to the feeding of the suspension beam to the coating line, the suspension state of the object to be coated on the suspension beam is detected, and thereby the coating spraying operation area of the coating gun is commanded. A detection device 5 is installed at the entrance of the painting line,
This makes it possible to automate the operation of the coating gun.

Further, when all paints are bake-curable paints, it is possible to deal with it by an operation method in which the paint line and the baking line are repeatedly passed.

The second transfer means 3 is located in the second stockyard B, and the first
It is composed of two chain conveyors with top rollers 18a, 18a similar to the stockyard A. This second transfer means 3 is used for the suspension beam 20 after the completion of coating from the transfer machine.
After picking up, the hanging beam is advanced according to the printing line speed. This fulfills the setting function after painting and the stock function for adjusting the line speed.
As described above, the above-mentioned transfer machine 19 as transfer means is provided outside each of both ends of the conveyors 18a, 18a.
Two sets of a and 19a are arranged. The one on the left side of the drawing is for taking down the hanging beam from the carrying end point 1B of the first carrying means 1, then lowering it, and further retreating and moving it to the second carrying means 3. On the right side, the suspension beam is advanced from the second transfer means 3, and the transfer start point 2A of the second transfer means is set.
It is for ascending to and transferring to the traveling rail.

The second conveying means 2 has a two-step rail structure like the first conveying means 1, but in the present embodiment, the loop-shaped conveying rail 46.
The system is changed to the tact conveyance means 60. Of course, the same loop-shaped transport rail 46 as the first transport means 1 may be used, but by using the tact transport means 60,
The batch type operation is adapted to the preferable baking process, and the second transfer means 2 to the third transfer means 8 of the suspension beam 20 are adapted.
Transfer / transfer to 0 (becomes a batch system) can be performed smoothly.

This carrying means has a running rail having the same structure as the running rail 45 of the first carrying means 1 described above, and a tact carrying means 60 is provided above it. The tact transport means 60 includes a carry-in pallet 64 reciprocally moved by a rack 63 (formed on a pallet) that meshes with a pinion 62 rotated by a drive motor 61, and a plurality of transport pallets 65 having a similar structure connected to these. And a tact transport rail 68 on which the pallets travel.

The carry-in pallet 64 has substantially the same length as the suspension beam 20, has rollers 66 at both ends of the pallet, and is formed in the same manner as the traveling rail 45.
A conveyor dock 67 that runs above and rotates freely in one direction and does not rotate in the other direction is attached to the lower side at an interval equal to the interval of the dock pins 53 of the suspension beam 20.
The conveyor dock 67 rotates counterclockwise from the illustrated state. Therefore, rack 6
The conveyor dock 67 catches on the dock pin 53 to move the suspension beam 20 in the forward direction when the rack 63 is returned by the rotation of the pinion 62 in the reverse direction when the rack 63 is returned. Therefore, the dock pin 53 is not caught. That is, when returning, the suspension beam 20 does not move, and only the carry-in pallet 64 and the transfer pallet connected in a straight line return on the tact transfer rail 68. The transport pallet 65 is the upper rack 63
Other than that, it is exactly the same as the carry-in pallet 64 except that a plurality of pallets are connected according to the length of the baking furnace 69.

The transport by the second transport means is performed by the drive motor 61. That is, when the drive motor 61 rotates the pinion 62 counterclockwise, the rack 63 moves to the right. Therefore, the carry-in pallet 64 and the transport pallet 65 move rightward on the tact transport rail 68. At this time, the conveyor dock 67 is hooked on the dock pin 53 and moves the suspension beam 20 on the traveling rail 45 to the right by one unit. At that time, the carrier pallet 65 located at the front end in the baking oven moves into the third stock yard C outside the baking oven 69. Therefore, the suspension beam, which suspends the baked coating object, is placed in the third stockyard C. After that, when the drive motor 61 is rotated in the reverse direction, the pinion 62 is also rotated in the reverse direction, and the loading pallet 64 and the transport pallet 6 are rotated.
5 returns to the left. At this time, since the conveyor dock 67 rotates, it does not catch on the dock pin 53. Therefore, the hanging beam 20 inside and outside the baking furnace maintains its position. Next, when the drive motor 61 is normally rotated, as described above, the pallet 64,
65 moves to the right again. Since the suspension beam has already advanced, the conveyor dock 67 of the pallet 65 in front is
Thus, the suspension beam 20 at the intermediate position is sequentially moved to the right by one pallet. As a result, the rightmost suspension beam is pushed out to the third stockyard C as described above. Again a series of pallets 64, 65 connected by the reverse rotation of the drive motor 61 returns, at which time the suspension beam 20 is kept in that position. Further, by the operation of rotating the drive motor 61 in the forward direction, the suspension beam 20 is sequentially moved to the right side in the drawing, and the transport end point 2B of the second transport means, that is,
It is sequentially conveyed to the third stock yard C in a batch system.

As described above, the second transfer means 2 is provided with the loading pallet 6
4 and the transport pallet 65 ... Therefore, the total connection length of the pallet is the second
The length is shorter than the length of the conveying means 2 by one suspension beam. Of course, the present invention is not limited to this, and the same one as the loop-shaped trolley chain conveyor 47 of the first transfer means may be used as described above.

As shown in FIG. 1, the second transfer means 2 is a baking oven 69 that is heated by various methods such as electrothermal radiation heating and hot air heating.
It is supposed to pass through.

As described above, at the transport end point 2B of the second transport means 2, the third transport means 80 for picking up and transporting the suspension beam 20 from the transport means 19 is provided, and the third stock yard C is formed. The transport crane means 4 is the third stockyard C
Is provided above. The third transfer means 80 takes the hanging beam 20 that has been baked from the second transfer means 2 by the transfer means 19 consisting of two sets of transfer machines 19a that are installed side by side, and then moves to a position convenient for transfer by the crane 11. In order to stock a predetermined amount of hanging beam while carrying, two sets of chain conveyors with top rollers 18a similar to other transfer means are used.
It will be arranged. Therefore, the crane 11 and the transfer machine 19
The conveyor of the third transfer means 80 is operated so as to match the operating speed with a. The third stock yard C formed by adjusting the transfer speed of the third transfer means 80 performs a stock function for adjusting the cooling after baking and the return cycle of the suspension beam to the working yard.

The configuration and the overall arrangement of each transport and transfer means are as described above, and the transfer means for transferring the suspension beam from each transport means to the transfer means and conversely from the transfer means to the transfer means is also as already shown. By the way, since the first and second conveying means have the traveling rail 45 composed of the two rail members 44 facing each other as described above, the roller 51 must be inserted into the traveling rail 45 in order to travel the hanging beam 20. I won't. Under normal conditions, it cannot be inserted between the rail members 44. Therefore, in this embodiment, the first
Also, appropriate places of the respective transport start points 1A, 2A and transport end points 1B, 2B of the traveling rail 45 in the second transport means are separated from other portions to form rail openings, and both slides having the same cross-sectional shape as the rail member are provided therein. Rail member 44
a and 44a are provided, and the rail opening / closing means 70 is connected so as to approach and separate from each other.

The transfer machine 19 that constitutes the opening / closing means 70 and the transfer means 19.
FIG. 7 shows the relationship with a. Note that FIG. 8 is a front view of the rail opening / closing means.

The rail opening / closing means 70 includes both slide rail members 44.
The cylinder bodies 72, 72 such as air cylinders and electric cylinders are attached to the frame 71 common to a and 44a so as to face each other, and the slide rail members 44a, 44a are fixed to the piston rods of the cylinder bodies 72, 7a.
Slide rail members 44a, 44a that face each other in the second movement
The rail openings are opened and closed by moving them toward and away from each other. The above-mentioned closing means that the slide rail members 44a, 44a are brought close to each other to be integrated with the traveling rail 45, and the rail opening is closed.

In order to smoothly move the slide rail member 44a by the cylinder body 72, in this embodiment, as shown in FIG. 8, the slide rail member 44a is fixed to the front surface of the lower slide base 73 formed in a box shape. Two sets of two rollers 74 are provided on both sides of the slide base, one set for each of the front and rear rollers 74, and the two sets of rollers 74 run on a slide rail 75 fixed to the lower end of the frame 71. The tip of the piston rod of the cylinder body 72 is connected to the slide base 73 via an L-shaped angle member. Slide rail 7
Reference numeral 5 is a steel material having a U-shaped cross section, and the roller 74 is inserted therein. Further, two slide rails 76 are provided in parallel on the surface of the slide base 73, and guide rollers 77 attached to the frame 71 are configured to ride on the slide rails 76, which facilitates smooth sliding and suspension of the suspension beam 20. It is designed to bear the load.

The transfer machine 19a is below the rail opening / closing means 70, and the mounting table 33 can receive the hanging beam 20.

For example, when the suspension beam 20 in the first stock yard A is moved to the conveyance start point 1A of the first conveyance means 1, the mounting table 33 is lowered by the cylinder body 32 of the transfer machine 19a, and it is moved by the cylinder body 31. The suspension beam 20 of the first stockyard A is pulled to the position of the head of the suspension beam 20, the cylinder body 32 is operated to raise the mounting table 33, the suspension beam 20 is mounted thereon, and the cylinder body 31 is operated in the mounted state to move forward. Then, it is carried to just below the traveling rail 45. At that time, the cylinder body 72 of the rail opening / closing means 70 is operated to separate the slide rail members 44a, 44a. The cylinder 32 is operated to raise the suspension beam, and the transfer unit 27
The roller 51 stops moving at a position where it enters between the slide rail members 44a, 44a. After that, the cylinder body 72 of the rail opening / closing means 70 is operated to bring the slide rail members 44a, 44a close to each other to close the rail opening and form a part of the traveling rail 45. By this operation, the suspension beam 20 can be transferred from the stockyard to the traveling rail 45.

Conversely, when lowering from the traveling rail 45 to the second and third stockyards, the mounting table 33 is raised to a position where both ends of the hanging beam 20 transported by the traveling rail 45 are placed,
After the suspension beam is put on standby, the rail opening / closing means is operated to open the slide rail members 44a and 44a, and then the mounting table 33 is lowered and further retracted to be carried to each stockyard, and the mounting table 33 is further moved. The suspended beam 20 is lowered and placed on the conveyor of the transfer means 3 and 80 in each stockyard.

The overall operation of the above embodiment will be described below.

First, a building material (not shown) as an object to be coated is suspended from the suspension beam 20 in the work yard 13. This hanging beam 2
0 is held by the gate crane 11 and moved between the pretreatment tanks while moving up and down to each pretreatment tank, and finally drained and dried to place the suspension beam 20 on the first transfer means 18 of the first stockyard A.

The suspension beam 20 that suspends the building material placed in the stockyard A is transported by the conveyor 18a near the transport start point 1A of the first transport means.

Therefore, as described above, the transfer means 19 and the rail opening / closing means 7
0, the roll 51 of the suspension beam 20 is placed on the traveling rail 45 of the first transport means 1. The chain conveyor 4 of the transport rail 46 traveling on the traveling rail 45
When the dock mounting portion 55 of 7 comes to the dock pin 53 of one of the transfer units 27 of the hanging beam 20, the hook portion 54a at the tip of the conveyor dock 54 is caught by the dock pin 53 and is pulled by the chain conveyor 47. The suspension beam 20 moves forward.

The building material suspended during the transportation of the suspension beam 20 by the first transportation means 1 is painted in a desired color by a spray painting means or the like in a painting line.

When the transport end point 1B of the first transport means 1 is reached, the conveyor dock 54 of the chain conveyor 47 is rotated by the dock opening plate at the fixed position to cancel the transport, and the limit switch provided side by side prevents further advancement. Meanwhile, the lifting beam 20 is picked up by the transfer means 19 by the transfer machine 19a and the rail opening / closing means 70 and transferred to the transfer means 3 of the second stockyard B. In the second stock yard, the conveyor of the transfer means 3 is operated while ensuring the holding time of the coating after coating and the adjusting time of the line speed of the baking furnace. The second transfer means 3 conveys the suspension beam 20 to the conveyance start point 2A of the second conveyance means 2 in the same posture. Here, as described above, the suspension beam 2 is attached to the traveling rail 45 of the second transfer means 2 by the transfer means and the rail opening / closing means.
Move 0.

The second conveying means 2 rotates the drive motor 61 in a forward rotation in a cycle corresponding to the baking conditions of the baking furnace, for example, a baking process is performed at 200 to 280 ° C. for 2 to 30 minutes depending on the coating material used for top coating. Reverse rotation. By the reciprocating movement of the rack 63 due to the rotation, the suspension beam 20 is intermittently transported in the baking oven 69 to the transportation end point 2B, that is, the third stock yard C as described above. In the meantime, the coating material applied to the building material suspended by the suspension beam 20 is baked. Transport end point 2
At B, it is again moved to the third transfer means 80 of the third stockyard C by the rail opening / closing means 70 and the transfer machines 19a, 19a, where it is transversely fed and cooled / stocked.

The suspension beam 20 having the building material cooled in the third stock yard C is lifted from the third transfer means 80 by the crane 11 and then returned to the working yard 13 again, where the building material is removed from the suspension beam 20, It is used for the next process.

Since the first transporting means 1 and the second transporting means 2 are independent of each other, it is possible to adjust the transporting speed to be independent and optimal. Further, since the hanging beam 20 after painting is returned to the first working yard 13 by the transport crane means 4, it is possible to attach and detach the building material to and from the hanging beam 20 at one place. It is possible to reduce the amount, and the suspended beam can be directly used for the next treatment.

[Effects of the Invention] As described above, in the coating process of the present invention, the first conveying means and the second conveying means are conveyed independently of each other, and further, these are arranged so as to make a U-turn in the conveying direction. Since they are arranged in parallel, the overall length of the process equipment can be reduced, and the transport speed during each work on the coating line and baking line can be optimized independently. The quality can be improved.

At the same time, according to the present invention, since the second transfer means is arranged in the second stockyard between the transfer end point of the first transfer means and the transfer start point of the second transfer means, the transfer of the suspension beam to this transfer means is performed. The loading time and the transfer time during that time can be used for both holding the setting after coating and adjusting the difference in line speed.

Further, in the present invention, the carrying direction of the second carrying means is opposite to that of the first carrying means, so that the carrying starting point and the burning ending point can be brought close to each other, and the pre-processing carrying crane means can be shared. Become.

Further, when painting a narrow long body such as a building material, by hanging a large number of suspension beams on one hanging beam as in the present invention, the receiving area for the spread of the paint by the coating gun is expanded, The effective utilization rate of can be increased.

Furthermore, while being arranged so as to intersect the transport start point of the first transport means and the transport end point of the second transport means,
Conveying crane means for arranging the work to be loaded and unloaded on a crane and a portion for performing pretreatment for coating, arranged in parallel to the second transfer means, and carrying cranes for reciprocating the suspension beam; Transfer means arranged at a position where the suspension beam is transferred to the first transport means in the first stockyard for temporarily storing the suspension beam which has finished the processing step;
Suspended to the first transfer means for transferring the suspension beam to the first transfer means in the stockyard, and to the third stockyard for temporarily storing the suspended beam, which suspends the painted building material, until it is transported by the transfer crane means. A transfer means arranged at a position for transferring the beam and a third transfer means for transferring the suspension beam to the working yard in the third stock yard,
By adopting a substantially P-shaped process arrangement so that the two can be transferred to each other, it is possible to transport the suspended beam in the pretreatment process and return it after coating with one crane, and
Pretreatment of building materials can be performed during the transportation by the transportation crane means, and continuous automatic operation can be performed from pretreatment to painting. In addition, mounting the coated object on the hanging beam,
Since the dismounting work can be performed at the same location, the work can be performed in common and the number of workers can be reduced. Furthermore, the site of the factory can be made into a square instead of a rectangle, which makes it easier to treat the site.

Furthermore, if a gate crane is used as the transport crane,
What is conventionally used for electrolytic coloring treatment of building materials can be used as it is, and the cost can be reduced.

On the other hand, if a traveling rail common to both the first transporting means and the second transporting means is used, and a roller by a transfer unit is attached to the suspension beam to cause the traveling rail to travel,
A long suspension beam can be stably transported, and
It becomes easy to transfer to another transportation means in the two-stage rail system.

In addition, a rail opening is provided in a part of the traveling rail, and rail opening / closing means for moving the slide rail members toward and away from each other is arranged therein to remove the suspension beam from the traveling rail or transfer to the traveling rail. It will be easy.

Furthermore, the transfer means that moves the loading beam up and down and moves forward and backward can reliably receive the lift beam from one transfer means and transfer it to another transfer means. And

In the coating process of the present invention, since the respective parts cooperate reasonably as described above, a highly efficient process as a whole is formed.

[Brief description of drawings]

FIG. 1 is a layout view of an entire embodiment of the present invention, FIG. 2 is a perspective view of a suspension beam, FIG. 3 is a side view of a transfer machine, and FIG.
FIG. 5 is a sectional view showing the relationship between the first conveying means and the hanging beam, and FIG. 6 is a side view showing the relationship between the first conveying means and the hanging beam. FIG. 6 is a partial sectional view showing the relationship between the second conveying means and the hanging beam. 7 is a side view of the rail opening / closing means, and FIG. 8 is a front view of the rail opening / closing means. 1: 1st conveyance means, 2: 2nd conveyance means, 3: 2nd conveyance means, 4: conveyance crane means, 11: crane, 13: work yard, 18: 1st conveyance means, 19: transfer means, 19
a: transfer machine, 20: suspension beam, 27: transfer unit, 3
1, 32: cylinder body, 33: mounting table, 34: receiving table, 4
4: rail member, 44a: slide rail member, 45:
Traveling rail, 46: Conveying rail, 47: Chain, 5
1: roller, 52: side roller, 53: dock pin,
54: Conveyor dock, 55: Dock mounting part, 60: Tact transport means, 61: Drive motor, 62: Pinion, 6
3: rack, 64: carry-in pallet, 65: transport pallet, 67: conveyor dock, 68: tact transport rail,
70: rail opening / closing means, 71: frame, 72: cylinder body, 80: third transfer means, A: first stockyard,
B: 2nd stockyard, C: 3rd stockyard.

Claims (4)

[Claims] 1. A plurality of objects to be coated are hung on one suspension beam,
In a coating process device that moves the suspension beam by a two-rail system of a transport rail and a traveling rail to apply paint to the object to be coated, the suspended beam that suspends the object to be coated is linearly transported in the longitudinal direction on the coating line. An independent first transporting means, a second transporting means for transporting the hanging beam in a direction opposite to the transporting direction of the first transporting means on a baking line arranged in parallel with the first transporting means, and the first transporting means. In the second stockyard that connects the transport end point of the first transport means and the transport start point to the second transport means, the second beam transporting the suspension beam transported by the first transport means to the second transport means.
A transfer means, and a transfer means arranged at a position for transferring the suspension beam from the first transfer means to the second transfer means and at a position for transferring the suspension beam from the second transfer means to the second transfer means, respectively. Coating process equipment. 2. A work yard and a coating which are arranged so as to intersect with a transport start point of the first transport means and a transport end point of the second transport means, and which mounts and unloads an object to be coated on a crane. The second part is connected to the part for preprocessing
Transfer crane means arranged in parallel with the transfer means for transferring the suspended beam back and forth, and a suspended beam transferred to the first transport means in the first stockyard for temporarily storing the suspended beam which has undergone the pretreatment process. A transfer means arranged at a position for changing, a first transfer means for transferring the suspension beam to the first transport means in the first stockyard, and a suspension beam for suspending the painted coating material are transported by the transport crane means. Transfer means arranged at a position where the suspension beam is transferred to the third stock yard where the suspension beam is temporarily stored, and third transfer means for transferring the suspension beam to the working yard in the third stock yard The coating process apparatus according to claim 1. 3. A portion of the traveling rails of the first transport means and the second transport means that intersects with the first transport means, the second transport means and the third transport means is opened in correspondence with a mounting interval of the transport unit of the suspension beam. The two slide rail members are arranged in the respective rail openings so as to face each other, and the rail opening / closing means for moving them so as to move them toward or away from each other is connected to each slide rail member. The coating process apparatus according to claim 1 or 2. 4. A transfer device, wherein each transfer means has a beam holding part for vertically moving a mounting part on which one end of the suspension beam is mounted, and a moving part for horizontally moving the beam holding part.
The coating process apparatus according to any one of claims 1 to 3, wherein the body and the rail opening / closing means are interlocked with each other and arranged at a lower position thereof.