JPS6028540Y2 - Hot air baking drying oven - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hot air baking drying oven, and more particularly to a hot air baking drying oven for continuously baking and drying coated materials coated by electrodeposition or the like using hot air.

In general, various building materials that are subjected to electrodeposition coating, etc. are coated with about 20
It is designed to be baked and dried with hot air at °C.

This hot air baking and drying apparatus usually includes a hot air baking and drying furnace for performing baking work, a hot air generating furnace, and a hot air circulation system.

The work process is as follows: First, the hot air generating furnace and hot air circulation system are activated, and then the object to be coated is transported by crane into the hot air baking drying oven, where it is baked and dried with hot air for a predetermined period of time. Afterwards, a method is adopted in which the object to be processed is again carried out using a crane and transported to another location.

However, in the above-mentioned conventional technology, as shown in FIG. and then close the opening/closing door 5 to remove the object 1.
Also, since the method of drying the entire electrolytic frame 2 etc. with hot air at approximately 200°C is adopted, the electrolytic frame 2, which originally does not require drying, is also dried, resulting in very poor thermal efficiency. It had the following drawback.

For example, assuming that the electrolytic frame 2 and its accessories are made of aluminum and the object to be processed is aluminum, the average weight of the electrolytic frame 2 is 10% of the total weight including the electrolytic frame 2. Since it accounts for ~30%, it means that energy is wasted unnecessarily by that amount.

For this reason, measures to prevent such energy loss have been investigated in various fields, but the problem has remained unsolved due to factors such as increasing the efficiency of drying operations and downsizing equipment.

In view of the prior art, the purpose of the present invention is to place the electrolytic frame that suspends the object to be processed outside the hot air atmosphere in the hot air baking drying furnace, and thereby to heat the electrolytic frame by An object of the present invention is to provide a hot-air baking drying oven that reduces heat loss and improves thermal efficiency in a baking drying process.

In the present invention, a first opening/closing door mechanism is provided at the upper end of the hot air baking/drying section in a hot air baking/drying oven, and a second opening/closing door mechanism is installed below the first opening/closing door mechanism at a predetermined distance. A hot air inlet and an outlet are set in the lower chamber formed by the partition of the second opening/closing door mechanism, and an electrolytic frame locking part for placing the electrolytic frame is provided in the upper chamber, A cutting groove corresponding to the object locking frame is provided in the door portion of the second opening/closing door mechanism, thereby achieving the above object.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 5.

Here, the same reference numerals are used for the same constituent members as in the prior art described above.

In FIGS. 3 and 4, reference numeral 10 designates the entire hot air baking drying oven, and reference numeral 11 designates a pair of crane devices for transporting the workpiece 1 according to the processing steps.

The crane device 11 includes a rail 12 extending horizontally in the left-right direction in FIG. 3 on the hot-air baking drying oven 10;
It has a crane main body 11A that moves on this rail 12.

To explain this more specifically, the crane device 11 is
As shown in FIG. 4, two sets of crane devices 11, 11 are installed above the hot air baking drying oven 10 so as to sandwich the hot air baking drying oven 10, and each of these crane devices 11, 11 can perform exactly the same operation at the same time. It is configured as follows.

The opposite sides of each of the crane bodies 11A, 11A are equipped with packets IIB, IIB that move up and down, and this packet 11B.

11B, the electrolytic frame 2 whose both ends are locked and the workpiece 1 suspended from the electrolytic frame 2 are transferred to the hot air baking drying furnace 1.
It can move up and down above 0.

Specifically, as shown in FIG. 2, the object to be processed 1 is comprised of a pair of object-locking frames 3, which are suspended and fixed to the electrolytic frame 2.
3, it is suspended as shown by the two-dot chain line in the figure.

The workpiece 1 thus suspended by the electrolytic frame 2 is taken in and out of the hot air baking drying furnace 10 by the crane device 11.11, as described above.

In this embodiment, the pre-curved hot air baking drying furnace 10 is divided into three parts by partition plates 12 and 12, thereby forming a hot air baking drying section. , 8.9 are formed.

Also, each of these hot air baking drying parts? , 8. At the upper end of 9, there is an opening 14 for taking in and out the workpiece 1,
15, 16 are formed, and on the upper surface side of each of the openings 14 to 16, first opening/closing door mechanisms 17, 18, 19 are provided for individually opening and closing each of the openings 14 to 16 as necessary. Equipped.

Each of these first opening/closing door mechanisms 17 to 19 is a pair of opening/closing doors 17A, 17B, and 18A.

18B, 19A, and 19B, and at the same time, a door control device (not shown) controls the opening/closing operation of each sealed can when the object 1 to be processed is taken in and taken out.

Below each of the first opening/closing door mechanisms 17 to 19, second opening/closing door mechanisms 20, 30, 40 are provided at a predetermined distance from the first opening/closing door mechanisms 17 to 19, as shown in FIG. like,
Equipped.

Thereby, each of the hot air baking and drying sections 7 to 9 creates electrolytic frame placement chambers 7A and 8A in which the electrolytic frame 2 is placed.

9A and a hot air drying chamber 7B for hot air baking of the workpiece 1
, 8B, and 9B.

Here, 20 of the second opening/closing door mechanisms 20, 30, and 40 will be explained first.

As shown in FIG. 3, the second opening/closing door mechanism 20 is constituted by a pair of bending/sliding opening/closing doors 2OA, 20B.

Among these, one opening/closing door 2OA is as shown in FIG.
It is formed into a hinge shape.

That is, the opening/closing door 20A includes a drive shaft 21, a rotary plate 22 whose one end is fixed along the drive shaft 21, and a pivot plate 22 which is rotatably supported by the other end of the rotary plate 22. The undulating plate 23 and the cutout portions 23B, 23 formed at the left and right corners of the tip portion (lower right end in FIG. 5) 23A of the undulating plate 23.
B, and a guide roller 24.24 rotatably mounted.

The guide rollers 24.24 can rotate on guide rails 25.25 fixed to the side walls 7C, 7G of the baking/drying chamber 7B, as shown in FIG.

And the outer end 24A of each guide roller 24.24.
, 24A are both end surfaces 23C, 2 of the undulating plate 23, respectively.
It is arranged so as to be located on the same plane as 3C.

Further, the undulating plate 23 and the drive plate 22 are formed to have the same length L in the direction along the drive shaft 21.

This length L is set to be slightly smaller than the distance between the opposing inner walls 7C and 7C of the baking drying chamber 7B in FIG. 4.

Further, the relief plate 23 has cutouts 123D and 23D cut inward from the edge of its tip 23A.

The cutting grooves 23D, 23D are formed to correspond to the pair of object locking frames 3.degree.3 fixed to the electrolytic frame 2 described above.

In reality, the width of the cut grooves 23D, 23D is relatively small in order to reduce leakage of hot air from the relevant portions, and the width of the grooves to be treated in the electrolytic frame 2 is adjusted accordingly. The width dimension of the object locking frames 3, 3 is also set relatively small.

In the opening/closing door 20A configured in this way, the drive shaft 2
1 is rotated in the direction of the arrow, the drive plate 22 rotates in the same direction together with this, and is simultaneously urged by the drive plate 22 and applied to the guide rollers 24.24 and guide rails 25.25. The undulating plate 23 is guided in the direction of arrow B in the figure.
It is designed to be slid in the direction.

The other opening/closing door 20B is also the one opening/closing door 20 mentioned above.
It is designed to be configured and function exactly the same as A.

The pair of opening/closing doors 10A20B configured in this manner are installed in the upper part of the hot air baking drying section 7, as shown in FIG. .

And each drive shaft 21 of each opening/closing door 20A, 20B.
21 is configured to be reciprocally driven in opposite directions at the same time within a predetermined angular range by an external drive mechanism 51, thereby rotating the undulating plate 23, 23 in the direction of arrow B shown in FIG. It can be moved back and forth in the opposite direction.

Further, the width W1 of the undulating plates 23, 23 is the width W1 of the driving plates 22, 2.
It is formed larger than the width W2 of No. 2.

Therefore, the raising and lowering operation of the raising and lowering plates 23, 23 is smoothly performed via the drive plates 22.22.

The second opening/closing door mechanisms 30, 40 installed in the other hot air baking drying sections 8, 9 are also constructed in exactly the same manner and can operate in the same manner.

Each baking drying chamber 7B, 8B of the hot air baking drying sections 7 to 9,
9B (i.e., the second opening/closing door mechanism 20,
Hot air discharge lowers E, 7E are provided adjacent to the drive shafts 21, 21, .

Hot air supply lowers F and 7F are provided at the lower end corners of 9B.

Further, the electrolytic frame arrangement chamber 7 of each of the hot air baking drying sections 7 to 9
At the upper ends of the left and right side walls of A, 8A, and 9A in FIG. 4, as shown in FIG.
, 8S, and 9S are formed in a plurality as shown in the left-right symmetrical positions in FIG.
The electrolytic frames 2, 2, . . . are anchored and supported in the buried state by the S, 9S (see FIGS. 3 and 4).

In addition, hot air discharge lowers E, 7E and hot air supply lowers F, 7F installed in each of the baking drying chambers 7B, 8B, and 9B.
are connected in parallel to the hot air circulation system 35.

An RC fan 36, a hot air generating furnace 37, and a filter box 38 are further connected in series to this hot air circulation system.

by this.

After dust is removed from the hot air generated by the hot air generating furnace 37 by a filter box 38, the hot air is sent to the hot air supply lowers F and 7F of each of the hot air baking chambers 7B, 8B and 9B.

The hot air that has contributed to baking and drying the object 1 in the baking drying chambers 7B, 8B, and 9B is sent to the hot air generating furnace 37 again by the suction action of the RC fan 36.

The hot air circulation system 35 also includes the above-mentioned baking drying chamber 7.
B, 8B, 9B, each baking drying chamber 7B, 8B, 9 between each hot air discharge lower E, 7E and hot air supply lower F, 7F.
Branch pipes 35A, 35A, . . . are installed for each branch pipe, and dampers 35B, 35B, . . . are installed in each branch pipe.
is provided.

The opening and closing operations of the dampers 35B, 35B, . . . are controlled by a damper control section (not shown), and the hot air is thereby sent only to the baking drying chamber 7B, 8B, or 9B into which the workpiece 1 has been carried. It is now possible to do so.

Next, the overall operation of the above embodiment will be explained.

When a workpiece subjected to electrodeposition coating is carried into the hot air baking drying oven 10, for example, the crane main body 11A.

When the workpiece 1 locked on the crane body 11A is conveyed onto the hot air baking drying section 9, the first opening/closing door mechanism 19 opens, and then the crane body 11A, IIA's baquerats 11B, 11
The second opening/closing door mechanism 40 starts to open at the same time as the lowering movement of the door B starts.

Thereafter, when the electrolytic frame 2 locking the workpiece 1 and the workpiece locking frames 3, 3 are placed in predetermined positions in the hot air baking drying furnace 10, the first and second opening/closing doors are simultaneously opened. Mechanism 19.40
starts the closing operation.

Immediately after the first and second opening/closing door mechanisms 19 and 40 begin to close, the damper 35 of the hot air circulation system 35 is opened.
B, 35B, is opened, thereby opening the hot air baking chamber 9B.
Hot air is forced inside.

In this case, some hot air leaks from the cutout grooves 23D and 23D formed in the undulating plate portion of the second opening/closing door mechanism 40 and is surrounded by the first and second opening/closing doors 19,40. It will be in a state where it will be sent out to the space side.

However, even if such a situation occurs, the leakage of the hot air will be more difficult due to its structure than the leakage of hot air from the upper end of the side wall of the processing layer, which is the supporting part of the electrolytic frame 2, which occurred in the conventional example described above. is set to .

Therefore, unlike the conventional example, the electrolytic frame 2 is simply heated by leaking hot air, so the heating temperature of the workpiece 1 (
(e.g. 200°C)
~130°C), which results in a structure whose overall heat loss is significantly reduced compared to the conventional example.

Next, when the baking drying of the object 1 is completed, the dampers 35B and 35B for the baking drying chamber 9B are closed to stop the supply of hot air.

Next, the crane body 11A, packet IIB of IIA,
When the electrolytic frame 2 is locked by IIB, the first and second
The opening/closing door mechanism 19.40 starts the opening operation, and the workpiece 1 is then taken out and transferred to the next process.

Thereafter, in the hot air baking drying section 9, the same process as described above is repeated.

The same applies to the other hot air baking drying sections 7 and 8.

In addition, in the above embodiment, the hot air baking drying section? , 8.
Although the case where the number 9 is provided at three locations has been described, the present invention is not necessarily limited to this, and may be provided at one location or four or more locations.

In addition, regarding the workpiece locking frames 3, 3 which are hung and fixed to the electrolysis frame 2 mentioned above, the position of one frame 3 is fixed depending on the size of the workpiece 1, and a part of the other frame 3 is fixed. It is also possible to adopt a configuration including a variable structure capable of moving 3A.

FIG. 6 shows an example, and P indicates the position of the second opening/closing door mechanism.

When the one shown in FIG. 6 is used, the cutting grooves 23D, 23D corresponding to the workpiece locking frames 3, 3 formed in the door portion of the second opening/closing door mechanism 20, 30. It has the advantage that it can be used as is, and the positions of the workpiece locking frames 3, 3 can be substantially changed.

As described above, according to the present invention, the first opening/closing door mechanism is provided at the upper end of the hot air baking drying section in the hot air baking drying oven, and the first opening/closing door mechanism is provided at a predetermined distance below the first opening/closing door mechanism. The lower chamber formed by the partition of the second opening/closing door mechanism is equipped with a hot air supply inlet and outlet, and the upper chamber is equipped with a hot air outlet and a hot air outlet for locking the electrolytic frame. Since the electrolytic frame locking part is provided and the electrolytic frame is placed outside the hot air atmosphere, the heat loss corresponding to the heating of the electrolytic frame, which has been a problem in the past, can be significantly reduced. The first opening/closing door prevents the heat loss flowing upward from the gap in the second opening/closing door mechanism from dissipating to the outside, so that the heat sealing efficiency can be improved in this respect as well. Furthermore, since a cutting groove corresponding to the workpiece locking frame is provided in the door portion of the second opening/closing door mechanism, the workpiece locking frame portion penetrates the workpiece locking frame approximately perpendicularly to the cutout groove. To provide an excellent hot air baking drying oven that is unprecedented and capable of eliminating the inconvenience that the opening/closing operation of the second opening/closing door mechanism is obstructed by the locking frame to be processed. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a hot air baking drying oven according to the prior art;
Figure 2 is a front view showing the electrolytic frame and the workpiece locking frame for suspending and locking the workpiece, and Figure 3 shows the hot air baking drying oven according to the present invention along the flow of the workpiece conveyance process. Figure 4 is a cross-sectional view taken along line IV-IV in Figure 3, Figure 5 is a vertical cross-sectional view taken along the
This figure is a perspective view showing the main part of the second opening/closing door mechanism shown in FIG. 3, and FIG. 6 is a front view showing another embodiment of the electrolytic frame portion. 2... Electrolytic frame, 3... Workpiece locking frame, 7°8.9... Hot air baking drying section, 7C...
...: Side wall as electrolysis frame locking part, 7E...Hot air discharge port, 7F...Hot air supply port, 23...
... Relief plate as the door part of the second opening/closing door mechanism, 23D... Cutting groove.

Claims (1)

[Scope of utility model registration request] Equipped with a hot-air baking drying section for carrying in the workpieces after electrodeposition coating from above and drying them with hot air, which are transported by being attached to the workpiece locking frame that is fixedly suspended from the electrolytic frame. In the hot air baking drying oven, a first opening/closing door mechanism is provided at the upper end of the hot air baking/drying section, and a second opening/closing door mechanism is provided at a predetermined distance below the first opening/closing door mechanism. Second
A hot air supply port and a hot air outlet are set in the lower chamber formed by the partition of the opening/closing door mechanism, and an electrolytic frame locking part for placing the electrolytic frame is provided in the upper chamber, A hot air baking drying furnace characterized in that a cutout groove corresponding to the workpiece locking frame is provided in a door portion of the opening/closing door mechanism.