JP2001162221A - Multi-storied building for surface treatment line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-storied building for a surface treatment line capable of effectively utilizing the waste heat from a drying oven in a multi-storied factory. SOLUTION: In a multi-storied building P for a surface treatment line having a plurality of floors on which surface treatment lines for a car are arranged, the air in the periphery of a drying oven 4 disposed on a downstair floor 1F is supplied to the burner 16 of the drying oven 10 disposed on the floor 2F of the next story.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction for performing undercoating, intermediate coating, topcoating and other surface treatments for automobile bodies and automobile parts (hereinafter referred to as surface treatments including undercoating to overcoating in this specification). More particularly, the present invention relates to a multi-story building for a surface treatment line of an automobile which can effectively utilize the exhaust heat of a drying oven in the multi-story building.

[0002]

2. Description of the Related Art A painting booth and a large number of painting drying furnaces are installed in a line for painting an automobile body and an automobile part.

[0003] The outline of a coating line for an automobile body will be described in the order of processes. An unpainted body (also called a white body) carried in from a welding process is first sent to a cleaning / pretreatment process, and is then applied to the body surface by a cleaning device. After the adhering oil and dust are removed, a pretreatment device forms a zinc phosphate coating on the body surface, which is a base for electrodeposition coating. Next, it is sent to an electrodeposition process, and after an electrodeposition coating film is formed on the body surface by an electrodeposition coating apparatus, the electrodeposition coating film is baked at a temperature of 170 ° C. in an electrodeposition drying furnace.

[0004] Next, a sealing material for preventing rain leakage and preventing rust is applied to the panel mating surface of the body,
A fusible insulator for vibration and sound insulation is attached to the floor panel surface of the room, and the sealing material and the fusible insulator are baked in a drying furnace at a temperature of about 120 ° C.

[0005] Further, the body is transported to an intermediate coating process,
After the intermediate coating paint is sprayed in the intermediate coating booth, it is baked in an intermediate coating drying furnace at a temperature of 140 ° C. The body after the intermediate coating is conveyed to a sharpening step, where the surface of the intermediate coating film is polished and washed with water, and then dried at a temperature of about 100 ° C. in a drain drying oven.

[0006] When the intermediate coating sharpening is completed, the body is transferred to a top coating process. In the overcoating process, after the overcoat is sprayed at the overcoat booth, 140
Baking at a temperature of ° C.

[0007] The coating process of a general automobile is completed in this manner. However, as has been seen, a large number of drying furnaces are installed in the coating line, and the baking temperature of each coating film is 100 ° C or higher.
Since the temperature is extremely high at 170 ° C., the ambient temperature around the drying furnace becomes extremely high. For this reason, in a conventional coating line, heat generated in a drying furnace is discarded outdoors using a ventilation fan or the like in order to improve the environment for workers and the like.

On the other hand, in the above-mentioned intermediate coating booth and top coating booth, since the intermediate coating paint and the top coating paint are handled, fresh air is taken in from outside for the purpose of maintaining the coating conditions, particularly the coating viscosity, at an appropriate value. After adjusting the temperature to an appropriate temperature, air is supplied to the booth.

[0009]

However, in the conventional coating line, the heat around the drying furnace is discarded outdoors without any reuse, which is not preferable from the viewpoint of energy saving. Of course, in order to suppress the heat generated from the drying furnace, it has been practiced to provide a heat insulating material on the furnace wall of the drying furnace. However, this also has limitations, and there is a problem that high-performance heat insulating material is expensive. is there.

[0010] The present invention has been made in view of such problems of the prior art, and in particular, provides a multi-story building for a surface treatment line capable of effectively utilizing exhaust heat from a drying furnace in a multi-story factory. The purpose is to do.

[0011]

(1) In order to achieve the above object, a multi-story building for a surface treatment line according to claim 1 has a surface having a plurality of floors on which a surface treatment line of an automobile is installed. In a multi-story building for a processing line, a surface treatment apparatus requiring heat is disposed immediately above or immediately below a surface treatment apparatus having a heat source.

In the multi-story building for a surface treatment line according to the first aspect of the present invention, the surface treatment apparatus requiring heat is disposed immediately above or immediately below the surface treatment apparatus having the heat generating source. The generated exhaust heat can be used only by providing a short path, and this exhaust heat can be effectively used, particularly in winter when hot air is required, and energy saving of the surface treatment line is achieved.

In the present invention, a drying furnace can be exemplified as a surface treatment apparatus having a heat source. Examples of the surface treatment apparatus requiring heat include a combustor of a drying furnace, an air conditioner of a painting booth, and a work place. Various installed air conditioners can be exemplified.

That is, in the multi-story building for a surface treatment line according to the present invention, a first floor and a second floor on which a surface treatment line of an automobile is installed are provided in a vertically stacked manner. In the multi-story building, the drying oven of the second floor is installed immediately above the drying oven provided on the first floor.

According to a third aspect of the present invention, there is provided a multi-story building for a surface treatment line for a surface treatment line in which a first floor and a second floor, each having a surface treatment line for an automobile, are provided in a vertically stacked manner. In a multi-story building, a painting booth on the second floor is installed immediately above a drying oven provided on the first floor.

Further, in the multi-story building for a surface treatment line according to claim 4, in the multi-story building for a surface treatment line having a plurality of floors on which a surface treatment line of an automobile is installed, the multi-story building is provided on a lower floor. Exhaust heat supply means for supplying air around the drying oven to a combustor of the drying oven provided on the floor of the own floor.

According to a fifth aspect of the present invention, there is provided a multi-story building for a surface treatment line, wherein the multi-story building for a surface treatment line has a plurality of floors on which a surface treatment line of an automobile is installed. Exhaust heat supply means for supplying air around the drying oven to an air conditioner of a surface treatment device provided on the floor of the own floor.

The air conditioner of the surface treatment apparatus according to the fifth aspect of the present invention is not particularly limited. For example, as in the multilayered structure for a surface treatment line according to the sixth aspect,
The supply destination of the air in the drying oven region by the exhaust heat supply means is an air conditioner of a middle coat booth and / or an air conditioner of a top coat booth.

(2) Although not particularly limited in the above invention, the multi-story building for a surface treatment line according to claim 7 further comprises an outside air introducing means for introducing outdoor air into the drying furnace area. And

In the above invention, when the air around the drying furnace is supplied to the surface treatment device on another floor, the floor on which the drying furnace is installed may become negative pressure and the air flow in the floor may be disturbed. Is provided, the room pressure on the floor can be properly maintained.

In this case, as in the multi-story building for a surface treatment line according to claim 8, the exhaust heat supply means supplies the air supplied to a combustor of the drying furnace or an air conditioner of a surface treatment device to the air. It is preferable to further include a switching unit for selectively switching between the air around the drying furnace and the outside air.

The supply of exhaust air from a surface treatment apparatus having a heat source to a surface treatment apparatus requiring heat is mainly performed when the environmental temperature is low. Therefore, when heat is not required, such as in summer, or when there is a possibility that a problem may occur if the temperature is too high, such a problem can be solved by supplying outside air using the switching means of the present invention. You.

The switching means may be constructed so as to digitally switch between the air around the drying furnace and the outside air, or to switch the air around the drying furnace and the outside air at an appropriate ratio. It may be configured to switch to mixing.

[0024]

According to the first aspect of the present invention, the exhaust heat generated by the heat source can be used only by providing a short path, and the exhaust heat can be effectively used especially in winter when hot air is required. Energy saving of the surface treatment line can be achieved.

In addition, according to the present invention, the warm air around the drying furnace is supplied to the combustor of the drying furnace or the air conditioner of the surface treatment device. Energy corresponding to the difference between the temperature and the room general temperature can be reduced.

According to the seventh aspect of the present invention, it is possible to prevent the floor on which the drying oven is installed from becoming negative pressure, thereby preventing the air flow in the floor from being disturbed, and appropriately maintaining the room pressure on the floor. be able to.

According to the invention of claim 8, the switching means of the present invention can be used even when heat is not required, such as in summer, or when a problem may occur if the temperature is too high. It is possible to supply outside air having a lower temperature than that around the drying oven.

[0028]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a multi-story building for a surface treatment line according to an embodiment of the present invention (hereinafter also referred to as a coating factory).
2 is a plan view showing the first floor, FIG. 2 is a plan view showing the second floor,
FIG. 3 is a plan view showing the third floor, and FIG. 4 is a longitudinal sectional view (sectional view taken along line IV-IV) of the embodiment.

The outline of the coating line of the present embodiment will be described with reference to FIGS.
A processing device from the pre-cleaning process to the electrodeposition process is installed on the floor 1F, a processing device from the sealing process to the intermediate coating process is installed on the second floor 2F, and a floor 3F on the third floor.
Is provided with a processing device for the overcoating process.

This embodiment shows only one specific example of the surface treatment apparatus arranged on one floor, and each floor 1F
The combination of the surface treatment devices installed on the first to third floors can be variously changed. In addition to dispersing the entire coating process from the pre-cleaning process to the overcoating process on three floors, the coating process may be distributed on two floors or on four or more floors. Are also within the scope of the present invention.

First, on the first floor 1F shown in FIG.
The unpainted body carried in from the welding process is first sent to a washing / pretreatment process while being mounted on a painting hanger, and after the oil and dust attached to the body surface are removed by the washing device 1, the pretreatment is performed. The apparatus 2 forms a zinc phosphate coating, which is a base for electrodeposition coating, on the body surface. Next, the film is sent to an electrodeposition process while being mounted on a coating hanger, and an electrodeposition coating device 3 forms an electrodeposition coating film on the body surface. The coating is baked.

The body that has exited the electrodeposition drying furnace 4 is transported straight or directly to the drop lifter 6 via the night storage line 5 and sent to the second floor 2F.

Next, on the second floor 2F shown in FIG.
The body sent by the above-described drop lifter 6 is replaced by a painting carriage and transported to the sealing step 7. In this sealing step 7, a sealing material for the purpose of preventing rain leakage and rust is applied to the panel mating surface of the body, and a fusible insulator for the purpose of vibration and sound insulation is attached to the indoor floor panel surface. You. Then, the sealing material and the fusible insulator are baked in the drying furnace 8 at a temperature of about 120 ° C.

Further, the body is transported to the intermediate coating process,
After the intermediate coating paint is sprayed in the intermediate coating booth 9, it is baked at a temperature of 140 ° C. in the intermediate coating drying furnace 10. After the intermediate coating is completed, the body may be transported to a sharpening step, the surface of the intermediate coating film may be polished and washed with water, and then dried at a temperature of about 100 ° C. in a draining drying oven.

The body exiting the intermediate coating drying furnace 10 is transported to the drop lifter 11 and sent to the third floor 3F.

As shown in FIG. 3, on the third floor 3F, the body that has been subjected to the intermediate coating is transported to the upper coating process. In the overcoating step, the overcoating booths 12a, 12b,
After the top coat is sprayed at 12c, it is baked at a temperature of 140 ° C. in the top coat drying furnaces 13a, 13b and 13c.

Incidentally, the intermediate coating booth 9 and the intermediate coating drying furnace 10 installed on the second floor 2F are a pair, whereas the upper coating booths 12a to 12c and the upper coating drying are installed on the third floor 3F. The reason why the furnaces 13a to 13c are three pairs is that the required man-hour in the overcoating step is larger than the required man-hour in the intermediate coating step. Therefore, the present invention is not limited to such a configuration, and the number of the upper coating booth and the number of the upper coating drying furnace may be one or two, or four or more.

In particular, in the coating factory P of this embodiment, FIG.
As shown in FIG. 1 to FIG. 3 (cross-sectional views along the line IV-IV), an intermediate coating drying furnace 10 is installed immediately above the electrodeposition drying furnace 4 installed on the first floor 1F. Immediately above the intermediate coating drying furnace 10, a top coating drying furnace 13b is provided. Although not directly above in a strict sense, a top coating booth 12b is installed almost directly above the intermediate coating drying furnace 10.

Then, as shown in the figure, a suction port 14 for sucking air in the drying furnace area 4 is opened in the ceiling of the electrodeposition drying furnace 4 on the first floor 1F, and a blowing fan is provided here. 15 is provided and supplied to the burner 16 of the intermediate coating drying furnace 10 as combustion air. Since the air around the electrodeposition drying furnace 4 reaches 40 ° C. to 50 ° C. due to heat radiated or leaked from the electrodeposition drying furnace 4, such high-temperature air is supplied to the combustor of the intermediate coating drying furnace 10. If supplied, thermal energy can be reduced by the difference between a general room temperature (for example, the temperature in a factory is around 15 ° C. in winter) and this temperature.

Further, in the coating factory P of this embodiment, 2
On the ceiling of the intermediate coating drying furnace 10 on the floor 2F of the floor, a suction port 17 for sucking air in the drying furnace area is opened, while on the third floor ceiling, an outside air introduction port for introducing outside air. 18 have been established. The suction port 17 and the outside air introduction port 18 are connected by a duct 19, and are connected to an air conditioner 21 of the overcoat booth 12 b via a switching damper 20.

The air to be supplied to the air conditioner 21 is 2
In the case where the air is around the intermediate coating drying furnace 10 on the floor 2F of the floor, the switching damper 20 is operated to the position shown by the solid line in the same figure, and when the air to be supplied to the air conditioner 21 is outside air. , The switching damper 20 is operated to the position shown by the dotted line in FIG.

In the coating booth, it is necessary to maintain a constant temperature in the booth in both summer and winter to keep coating conditions (particularly coating viscosity) constant, thereby improving coating quality. Therefore, in winter or the like when the temperature in the factory becomes low, the air around the middle coating drying furnace 10 is supplied to the air conditioner 21 of the top coating booth 12b. Accordingly, the air having a high temperature of 40 ° C. to 50 ° C. is supplied to the air conditioner 21, so that the heat energy required for temperature control can be reduced. Conversely, in summer or the like when the temperature in the factory becomes high, the temperature of the air supplied to the air conditioner 21 is preferably as low as possible. Therefore, the switching damper 20 is switched to the position shown by the dotted line to supply the outside air to the air conditioner 21. I do.

The air conditioner 21 is provided with an air conditioning room.
A blower fan 22 for supplying conditioned air to the booth 12b is provided in this air conditioning room. Although not shown in detail, a heating burner is provided upstream of the blower fan 22.
Various devices such as a filter for dust removal, a shower for humidification, and a burner for humidity control are arranged, and the conditioned air passing through these devices flows from the upper part of the booth via a duct (not shown) provided at the upper part of the booth 12b. Be blown out.

By the way, the conditioned air blown into the booth 12b flows downward in the entire booth 12b, and is discharged out of the system by an exhaust fan (not shown). By the air conditioning in the booth, the temperature of the paint sprayed in the booth is maintained at an appropriate temperature, and the coating quality is maintained. In addition, by blowing the wind at a constant speed from the ceiling of the booth 12b toward the floor, the scattering of the atomized paint can be suppressed, and the problem of color jump to the adjacent body can be prevented.

Further, in the coating factory P of this embodiment, an outside air inlet 23 for introducing outside air into the drying furnace area is provided near the electrodeposition drying furnace 4 installed on the first floor 1F. . The outside air inlet 23 is formed of a gallery having a filter, and compensates for a negative pressure caused by suction of air around the electrodeposition drying furnace 4 from the inlet 14. That is,
When the air above the electrodeposition drying furnace 4 is supplied to the combustor (burner 16) of the intermediate coating drying furnace 10 through the suction port 14, the surroundings of the electrodeposition drying furnace 4 become negative pressure. Is supplied from the vicinity of the electrodeposition drying furnace 4 so that the first floor 1
It is possible to prevent the occurrence of a drift in the entire F.

The outside air inlet 24 provided on the second floor 2F has the same meaning.

Next, the operation will be described. In a drying furnace such as an intermediate coating, combustion air is supplied to the burner (burner 16) to generate hot air, which is supplied into the drying furnace. Therefore,
The higher the temperature of the combustion air, the smaller the energy required for combustion.

In a booth such as a top coat, generally, one booth is used.
It is considered desirable to maintain the room temperature at about 8 ° C. to 22 ° C. in terms of the stability of the paint viscosity and the working environment. However, the temperature difference becomes 10 ° C. or more in winter when the outside air temperature is low. For this reason, conventionally, a heater was provided in the air conditioner 21 to heat the outside air sucked from the outside air inlet 18 to the above-described appropriate temperature and supply it to the booth. A burner, steam, or the like is used as a heat source of this heater, and the energy is reflected in running costs.

In the present embodiment, a drying furnace or an air conditioner that requires heat is installed just above the drying furnace serving as a heat source by using heat generated from a plurality of drying furnaces. Then, the warm air is supplied to the combustor of the drying furnace and the air conditioner of the coating booth by the exhaust heat supply means. In the illustrated example, warm air around the electrodeposition drying furnace 4 is supplied to the combustor 16 of the intermediate coating drying furnace 10. In addition, the warm air around the intermediate coating drying furnace 10 is supplied to the air conditioner 21 of the overcoat booth 12b (only when the room temperature is low such as in winter).

Thus, the combustion energy required for the combustor of the drying furnace can be reduced. Also, especially in the winter season when heating is required, this hot air can be supplied to the booth as it is or with only a slight heating, and the energy consumed by the conventional burner and steam can be saved. Can be.

The embodiments described above are described for the purpose of facilitating the understanding of the present invention, but are not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

For example, in the above-described embodiment, the air around the electrodeposition drying furnace 4 is supplied to the combustor of the intermediate coating drying furnace 10, and the air around the intermediate coating drying furnace 10 is supplied to the top coating booth 12.
b, but this is only an example,
It can be changed as appropriate according to the layout of each floor.

Although the example using the heat source downstairs has been described, it is of course possible to use the heat source upstairs depending on the layout.

Further, as shown by a dashed line in FIG. 4, a partition 25 is provided between the intermediate coating booth 9 and the intermediate coating drying furnace 10.
And the warm air around the drying oven 10 may be supplied to the air conditioner 26 of the booth 9. In this case, switching to the outside air is performed using the outside air inlet 27 provided on the second floor 2F.

[Brief description of the drawings]

FIG. 1 is a plan view showing the first floor of a multi-story building for a surface treatment line according to an embodiment of the present invention.

FIG. 2 is a plan view showing the second floor of the multi-story building for a surface treatment line according to the embodiment of the present invention.

FIG. 3 is a plan view showing the third floor of the multi-story building for a surface treatment line according to the embodiment of the present invention.

FIG. 4 is a sectional view taken along the line IV-IV of FIGS. 1 to 3;

[Explanation of symbols]

 P: Coating factory (multi-storey building for surface treatment line) 1F to 3F: Floor 4: Electrodeposition drying furnace 9: Intermediate coating booth 10: Intermediate coating drying furnace 12a to 12c: Top coating booth 13a to 13c: Top coating drying furnace 14 , 17 ... Suction port 15 ... Blower fan 16 ... Burner (combustion machine) 18,23,24,27 ... Outside air introduction port 19 ... Duct 20 ... Switching damper 21 ... Air conditioner

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E04H 5/02 E04H 5/02 A // F26B 15/00 F26B 15/00 Z F-term (Reference) 3D114 AA20 BA01 CA10 3L113 AA02 AA03 AB02 AC03 AC56 AC57 AC64 BA33 DA03 4D075 BB24Z BB99Z CA47 DB02 DC12 EA05 4F042 AA09 DB01 DB39 DC01 DE04 DE07

Claims (8)

[Claims] In a multi-story building for a surface treatment line having a plurality of floors on which a surface treatment line of an automobile is installed, a surface treatment device that requires heat directly above or below a surface treatment device having a heat source is provided. A multi-story building for a surface treatment line, which is arranged. 2. A multi-story building for a surface treatment line in which a first floor and a second floor on which a surface treatment line of an automobile is installed, respectively, are provided in a hierarchical manner, wherein the drying is provided on the first floor. Immediately above the furnace, the second
A multi-story building for a surface treatment line, wherein a floor drying oven is installed. 3. A multi-story building for a surface treatment line in which a first floor and a second floor on which a surface treatment line of an automobile is installed, respectively, are provided in an upper and lower hierarchy, wherein the drying provided on the first floor is provided. Immediately above the furnace, the second
A multi-story building for a surface treatment line, characterized by a floor painting booth. 4. A multi-story building for a surface treatment line having a plurality of floors on which a surface treatment line of an automobile is installed, wherein air around a drying furnace provided on a lower floor is provided on a floor of the own floor. A multi-story building for a surface treatment line, characterized by having exhaust heat supply means for supplying to a burner of a drying oven. 5. A multi-story building for a surface treatment line having a plurality of floors on which a surface treatment line of an automobile is installed, wherein air around a drying furnace provided on a lower floor is provided on a floor of the own floor. A multi-story building for a surface treatment line, characterized by having exhaust heat supply means for supplying to an air conditioner of the surface treatment device. 6. A supply destination of air in the drying oven region by the exhaust heat supply means is an air conditioner of an intermediate coating booth and / or an air conditioner of a top coating booth.
A multi-story building for a surface treatment line as described. 7. An outside air introducing means for introducing outdoor air into the drying furnace area.
7. The multi-story building for a surface treatment line according to any one of 6. 8. The switching means for selectively switching the air supplied to the combustor of the drying furnace or the air conditioner of the surface treatment device to the air around the drying furnace and the outside air. The multi-story building for a surface treatment line according to claim 7, further comprising: