JPH09280734A - Conveyor device in drying furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a chain belt conveyor free from meandering movement by rolling either one of a pair of left and right rollers and rails with sandwiching the rail between left and right flanges of the roller and rolling the other roller on the rail by using a flange formed on one side of the roller. SOLUTION: Each of shafts 21 at specified intervals in a longitudinal direction of a chain belt conveyor has an extension and rotatably supports rollers 9, 10 through a spacer 27 and the rollers 9, 10 are rotatably placed on a pair of left and right rails 12, 13. The roller 9 is provided with left and right flanges 91 to be sandwiched between a top end of the rail 12 and the roller 10 is provided with a flange 19 located inside of the rail 13. The rail 12 is formed in a trapezoidal section shape corresponding to a peripheral groove 90 of the roller 9 and a non-contact space (S) is formed between the rail 12 and a bottom of the groove 90 of the roller 9. Thus, the chain conveyor can move straight along the rails even if the chain conveyor is subjected to influence of thermal expansion due to temperature in a furnace.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveying device in a drying oven, and in particular, after printing or coating a metal sheet (metal printing), hot air is blown to dry the printed surface or coated surface of the sheet. This is an improvement of the structure of rollers and rails in a device for feeding into a drying oven for supply.

[0002]

2. Description of the Related Art Beverages such as beer and canned food products have prospered, and in order to make this can, a rectangular or square metal sheet such as an aluminum sheet is subjected to necessary printing or painting, and then this is formed. Transport it to a drying oven for drying, and then
The metal sheet is cut appropriately to be formed into a can for canning or product packaging.

By the way, in a conventional drying oven for drying a printed surface or a coated surface of a metal sheet, a pair of left and right endless chain belt conveyors penetrate through a tunnel-shaped oven, and sprockets are respectively provided at an inlet and an outlet of the oven. It is rotationally driven in synchronism. Between the pair of left and right chain belt conveyors, a plurality of wickets for planting and supporting the metal sheet that has been printed or painted and should be dried are planted. Further, a belt conveyor for continuously supplying metal sheets is provided on the oven inlet side, and a belt conveyor for discharging and receiving the dried metal sheets from the wickets and delivering the dried metal sheets to the collecting area is disposed on the oven outlet side. . Further, hot air is supplied into the oven.

As shown in FIG. 7, the pair of left and right chain belt conveyors 2 are provided with rollers 10 at regular intervals in the longitudinal direction thereof, and the rollers 10 are rotatably supported by rails 13. There is. The roller 10 is shown in FIG.
As shown in FIG. 5, the roller 10 is a roller having a collar portion 11 on one side, and the roller 10 is axially supported by extending a shaft 21 that rotatably connects the chain 20. The shaft 21 connects the chains 20, 20 with a spacer ring 25 sandwiched between them. A U-shaped arm 22 is integrally formed on one side of the chain 20, and holes 23 are formed at both ends of the arm 22. The insertion portion 51 at the lower end of the wicket 5 is inserted and fixed.

As shown in FIG. 7, a wicket 5 connects a pair of left and right chain belt conveyors 2, 2 and a metal sheet 6 printed or painted on the wicket 5 is vertically attached at a hook portion 52. It is supposed to be supported by.

[0006]

However, according to the above-mentioned conventional conveying device in the drying oven, the roller 10 moves the rail 13 because the chain belt conveyor 2, particularly the wickets 5 thermally expand at the temperature in the drying oven. When moving while rotating, the chain belt conveyors 2 and 2 tend to meander, and due to the meander, the inner shoulder of the upper end of the rail 13 is worn away to generate metal powder, and the metal powder of the metal sheet 6 still remains. The product value of the printed or painted surface may be reduced by adhering to the undried printed or painted surface.

Therefore, according to the present invention, the pair of left and right chain belt conveyors 2, 2 can be moved in the drying furnace without meandering, thereby making it difficult for the rails 13, 13 to be worn away, and for the metal powder to be the metal sheet 6. It is intended to prevent the ink from adhering to an undried printed surface or painted surface.

[0008]

In a drying furnace conveying device according to the present invention, a pair of left and right endless chain belt conveyors penetrates the drying furnace for supplying hot air, and sprockets are provided near the entrance and the exit of the drying furnace, respectively. A plurality of wickets are planted at predetermined intervals by connecting the pair of chain belt conveyors so as to be rotatable in synchronism with each other. Drying furnace in which the printed surface or the coated surface of the metal sheet is dried while the wickets are moving in the drying furnace, and the metal sheet is discharged at the outlet side of the drying furnace to be accumulated. In the internal conveyance device, either one of the roller pivotally supported on each of the pair of left and right chain belt conveyors and the rail on which it is rollably mounted is mounted. With rolls sandwiching the rail left and right flange portions formed to the roller, the other is characterized in that the structure for rolling rail flange portion formed on only one side of the roller.

Therefore, the roller of one of the pair of chain belt conveyors is regulated by the rail and rolls straight along the rail, and the other roller does not clamp the rail, so that the influence of thermal expansion should be absorbed. It can be displaced, so that the chain belt conveyor does not meander and move, thus preventing the generation of metal powder between the rollers and the rails, so that the metal powder can be printed or painted on the metal sheet. It can prevent it from adhering to the surface.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a pair of left and right endless chain belt conveyors 2 and 2 penetrate through a tunnel-shaped oven 4 as a drying oven, and the oven inlet 7 and outlet 8 rotate in synchronization with each other via sprockets 3. A large number of wickets 5 are driven by connecting the chain belt conveyors 2 and 2, and a metal sheet 6 on which printing or painting has been completed is supported by the wickets 5 and the oven inlet 7 to the oven outlet 8 are supported. Be transported to.

On the oven inlet 7 side, a belt conveyor 14 for continuously supplying the printed or painted metal sheet 6 between the rotating wickets 5 is arranged, and on the oven outlet 8 side. Is provided with a belt conveyor 15 for receiving the metal sheet 7 fed out from between the wickets 5 and conveying it to the stacking site.

A duct and a blower 16 to which hot air is appropriately connected are provided in the oven 4 so that the printed surface or the coated surface is dried while the metal sheet 6 is moving in the oven 4.
The exhaust gas supplied from the hot air supply source 17 via the blower 18 and having been dried is discharged from the blower 18 to the outside of the oven 4. Further, an oven for supplying cold air is arranged subsequent to the oven 4 for supplying hot air, but the oven for supplying cold air is omitted for convenience of description.

The wicket 5, as shown in FIGS.
A substantially U-shaped or quadrilateral frame body is formed of a steel material having a substantially rectangular cross section, and a spacer portion 53 made of a wire material for keeping a constant interval between the wickets 5 on the left and right of the upper end portion.
Is attached and fixed by welding, etc., and the insertion part 5
A plurality of hook portions 52 made of wire for receiving 1 and the metal sheet 6 are attached and fixed upward. As shown by phantom lines in FIG. 3, the insertion portion 51 is inserted into the insertion holes 23, 23 of the arm 22 formed in the chain 20 of the chain belt conveyor 2 and fixed by a pin 55 or the like so as not to be pulled out. It is like this.

As shown in FIGS. 4 and 5, the chain belt conveyor 2 is formed integrally with a chain 20 connected to each other by a shaft 21 with U-shaped arms 22 inclined and at both ends of the arms 22. A hole 23 is provided. The interference plate 24 between the adjacent chains 20 connects the shafts 21 with the collar 25, and the collar 25 with which the tooth portion of the sprocket 3 is engaged with the collar 25.
Are rotatably fitted. Further, shafts 21 are extended at predetermined intervals in the longitudinal direction of the chain belt conveyor 2, and rollers 9 and 10 are rotatably supported by washers 28 and stop pins 29 with spacers 27 interposed therebetween. The rollers 9 and 10 are rotatably mounted on a pair of left and right rails 12 and 13 arranged in the oven 4.

As shown in FIGS. 2 and 5, the roller 9 has left and right flange portions 91, 91 which sandwich the upper end portion of the rail 12, but the roller 10 is placed inside the rail 13 as shown in FIGS. Having only the collar portion 19 located,
This roller 10 is substantially the same as that of the conventional example. In addition, as shown in FIG.
It is formed in a trapezoidal cross section that matches the peripheral groove 90 of the roller 9. Therefore, a non-contact gap S can be formed between the rail 12 and the bottom surface of the peripheral groove 90 of the roller 9.

Therefore, the rollers 9 rolling on the rails 12 are arranged so that even if the chain belt conveyor 2, particularly the wickets 5 are affected by thermal expansion at the temperature inside the furnace, the rails 1 are
Since the rail 12 can be moved straight along the rail 2, the rail 12 is worn away to suppress the generation of metal powder, and the chain belt conveyors 2 and 2 are prevented from meandering.

On the other hand, the roller 10 rolling on the rail 13
Since the brim portion 19 is located inside the rail 13, it is affected by the thermal expansion of the chain belt conveyors 2, 2, particularly the wickets 5, and rolls while being displaced in both the inner and outer directions with respect to the rail 13. Therefore, as shown in FIG. 6, if a predetermined clearance C is formed between the collar portion 19 and the rail 13 in advance, thermal expansion can be absorbed. The roller 10 does not meander because the roller 9 is restricted by the rail 12 and can roll straight without being meandered. Therefore, the inner shoulder of the rail 13 does not wear away.

Thus, the chain belt conveyors 2, 2
In order to prevent the meandering of the rails, the rollers 9 and 10 are connected to the rail 1
2 and 13 will not be worn out and worn, and therefore, the generation of metal powder is reduced, and the metal powder is less likely to adhere to the printed surface or the coated surface of the metal sheet 6. Therefore, it is possible to prevent the situation where the commercial value of the printed surface or the painted surface is diminished in the step of drying the printed or painted metal sheet.

Since the present invention is not limited to the case where the printed or painted metal sheet 6 is dried, it can be applied to the step of drying food or other products in a drying oven similar to the oven 4. Needless to say.

[0020]

According to the present invention described above, one of the roller pivotally supported by each of the pair of left and right chain belt conveyors and the rail on which the roller is rotatably mounted is provided by the collar portion of the roller. With the structure in which the rails are sandwiched, it is possible to absorb the adverse effect of thermal expansion in the drying furnace of the chain belt conveyor and prevent the meandering.

Therefore, the amount of metal powder to be generated between the rolling roller and the rail is reduced, the metal powder adheres to the printed surface or the coated surface of the metal sheet, and the reduction in the commercial value of the printed surface or the coated surface dries. It can be prevented from occurring in the process.

[Brief description of drawings]

FIG. 1 is a schematic front view of a transfer device in a drying furnace showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a sectional side view of FIG.

FIG. 4 is a partial front view (A) and a plan view (B) of the chain belt conveyor.

FIG. 5 is a sectional view taken along line YY of FIG. 4;

6 is a sectional view similar to FIG.

FIG. 7 is a sectional view similar to FIG. 2 showing a conventional example.

8 is a sectional side view of the main part of FIG.

[Explanation of symbols]

 1 ... Conveying device in drying oven 2 ... Chain belt conveyor 3 ... Sprocket 4 ... Oven (drying oven) 5 ... Wicket 6 ... Metal sheet 7 ... Oven inlet 8 ... Oven outlet 9, 10 ... Roller 12, 13 ... Shaft 19, 91 ... Brim

Claims (1)

[Claims] 1. A pair of left and right endless chain belt conveyors penetrates a drying furnace for supplying hot air, and is rotatably supported by a sprocket in the vicinity of an inlet and an outlet of the drying furnace, respectively, and A plurality of wickets connecting the chain belt conveyors are planted at a predetermined interval, and a metal sheet on which printing or painting has been finished is supplied to and supported by the inlet side of the drying oven, and the wickets are moved inside the drying oven. In the drying furnace transporting device, which is configured to dry the printed surface or the coated surface of the metal sheet during the movement, and discharge the metal sheet at the exit side of the drying furnace so as to accumulate the metal sheets, on each of the pair of left and right chain belt conveyors. Rolling is performed by sandwiching the rail between the pivotally supported roller and the rail on which it is rollably mounted, with the left and right flanges formed on the roller. At the same time, the other has a structure in which the rail is rolled by a flange portion formed on only one side of the roller, and the conveyance device in the drying furnace is characterized in that.