JPH0336752B2 - - Google Patents

Description

Detailed Description of the Invention Technical Field The present invention relates to a suspended conveyance device for transporting a thin metal sheet in a horizontal direction while holding it in a vertical position during the process of performing surface treatments (for example, painting) on the thin metal sheet. .

BACKGROUND ART Conventionally, when performing surface treatment such as painting on a thin metal plate, a thin metal plate conveying method and apparatus as shown in FIG. 13 have been employed. In other words, in this conventional method, the thin metal sheet wound into a coil is not processed in a continuous state, but the thin metal sheet is cut into the specified product dimensions before processing, and the cut single sheet is This is a method in which predetermined processing is performed on the plate.

To explain in detail with reference to FIG. 13, numeral 1 is a long thin metal plate to be processed, which is wound around a core tube 2 in a large amount in the form of a coil. 3 and 4 are feed rollers, and 5 is a cutter. As shown in the figure, the metal thin plate 1 is laid out in a horizontal position and in a horizontal direction. The cutter 5 reciprocates in the vertical direction, that is, in the up and down direction, and cooperates with the cutter lower mold 6 to cut the long thin metal plate 1 into a veneer 1' of the final product size.
Cut the pieces one by one. A conveyor 7 sequentially sends the veneers 1' cut by the cutter 5 forward. The processing steps are temporarily stopped here, and the veneer 1' is then subjected to degreasing, drying, painting, and baking in this order. In the figure, 10, 12, 13, 1
4 indicates a degreasing tank, a drying zone, a painting zone, and a baking zone, respectively. Reference numeral 8 denotes a hanger conveyor, which circulates a circulation drive means such as an endless chain between the degreasing tank 10 and the baking zone 14. A large number of hangers 9 are attached to this circulation drive means at predetermined intervals, and a factory worker hangs the veneers 1' one by one onto the hangers 9. Each veneer 1' suspended and conveyed by the circulation drive means passes through a solvent 11 in a degreasing tank 10, and then conveyed to a drying zone 12, a painting zone 13 and a baking zone 14. Burning zone 1
The veneer 1'' carried out from the hanger 9 is sent to the next process (not shown).Then, as in the former case, the veneer 1'' is usually manually attached to the hanger 9 by a factory worker.
I will have to remove it more.

The above conventional example shows an example with a very simple process, but according to other conventional examples, the degreasing process is independent between the metal sheet cutting process and the processing process below the drying zone. In some cases, there may be a hole punching step before the metal sheet cutting step.

However, each of the above conventional examples has various drawbacks.

First of all, in order to cut a continuous long thin metal plate 1 into individual veneers 1', it is necessary to immerse the veneers one by one in a degreasing tank or hang each one on a hanger 9, which is extremely difficult. There is a problem in that it requires manpower. In addition, as described above, if the individual veneers 1' are transported while suspended on the hanger 9, the veneers 1'
In order to prevent adjacent veneers 1' from coming into contact with each other, the distance between adjacent hangers must be made considerably large, and the length of the process in the feeding direction of the thin metal sheet becomes longer. There is a problem. Furthermore, in order to reduce the shaking of the veneer 1', it is necessary to reduce the speed of the conveyor considerably, which poses the problem of poor production efficiency and high costs. Furthermore, as described above, when each veneer 1' is hung on the hanger 9, the veneer 1' is deformed due to the bending tendency when coiled or the press distortion during the hole punching process. , there is a problem that local variations in quality occur during the painting and baking processes.

The causes of the various problems mentioned above lie in the fact that the continuous thin metal sheet 1 is cut into veneers 1' in advance and the veneers 1' are subjected to predetermined processing. Therefore, in order to solve the above-mentioned problems, each process should be performed while the thin metal plate 1 remains continuous, but this continuous processing has conventionally been considered impossible. That is, in the degreasing process and the drilling process, the metal thin plate 1 needs to be fed in a horizontal position, whereas in the painting process, the metal thin plate 1 needs to be fed in a vertical position. That is,
Normally, in the cutting process, the cutter 5 is driven in the vertical direction, and the cutter 5 is not normally moved horizontally to cut a vertically positioned metal sheet. Further, as a matter of course, it is impossible to continuously bend the thin metal plate along a vertical plane and pass through the degreasing tank 10 while maintaining the vertical position. Furthermore, in the painting process, an excessive amount of paint is applied to the surface of the passing metal sheet, and this excess paint falls downward by being suspended vertically as shown in Figure 13. This eliminates the inconvenience of
If paint is sprayed on the thin metal plate in a horizontal position, the excess paint on the upper surface will not flow downward and uneven coating will occur, which is not practical.

Therefore, in order to continuously process a thin metal sheet in a specified manner, the thin metal sheet is fed in a vertical position and in a horizontal direction in a specified processing step, while the thin metal sheet is It is necessary to twist the metal sheet 90 degrees before and after the processing process so that the metal sheets are fed horizontally in a horizontal position. However, in the past, it was considered impossible to apply such a twist to a thin metal plate because it would cause wrinkles and other distortions.

As shown in the Examples below, the present inventors
without causing wrinkles or other distortions in the thin metal plate.
In a predetermined processing step, the metal sheet is fed vertically and horizontally, while in the steps before and after the processing step, the metal sheet is fed in a horizontal position and in the horizontal direction.

However, in the above predetermined processing step,
When heat is applied to the metal sheet, the metal sheet undergoes thermal expansion, which may cause wrinkles to occur in the metal sheet during transportation.

Technical Problem of the Present Invention Therefore, the technical problem to be solved by the present invention is to absorb the deformation of the thin metal sheet due to thermal expansion caused by the heat applied in the processing step by moving the thin metal sheet in a vertical position in the above-mentioned processing step. To provide a conveyance device capable of conveying a thin metal plate in a vertical position and in a horizontal direction without causing distortion such as wrinkles.

Summary of the present invention (structure, operation, effect) In order to achieve the above technical problem, the present invention was constructed as follows.

That is, a plurality of clipping devices for suspending and gripping the upper edge of a continuous long thin metal sheet in a vertical position are driven to circulate at regular intervals, and each clipping device is moved horizontally at least in the thin metal sheet gripping area. Each of the clipping devices includes a frame fixed to a circulation drive means such as an endless chain, and a frame that is freely movable in the horizontal direction and vertically movable in the thin metal plate gripping area with respect to the frame. a pair of clip plates for gripping a thin metal sheet, which are provided in a manner that the clip plate is not connected to the thin metal sheet gripping area; The thin metal plate was released at the end.

In the above device, even if the thin metal plate undergoes thermal expansion during a predetermined processing step, the clip plate that grips the upper edge of the thin metal plate can freely move horizontally with respect to the frame. Thermal expansion is absorbed and distortions such as wrinkles do not occur.
Therefore, the thin metal sheet can be fed straight in the horizontal direction along the feed line without being bent in the processing step, and therefore the thin metal sheet can be processed well in the processing step.

Embodiment Hereinafter, one embodiment of the present invention will be described in detail based on FIGS. 1 to 9. This example shows an example in which the method of the present invention is applied to painting equipment.

Figures 1 and 2 show the entire painting equipment. FIG. 1 is a plan view, and FIG. 2 is a side view.

The continuous long metal thin plate 19 to be processed is a heart tube 20
It is wound into a coil shape, and is sent in a roughly horizontal direction sequentially from one end of the feed line l in FIG. 1 to the other end along the feed line l, and in the middle of the feed, First, a hole is made by the hole puncher 23, then the surface of the thin metal plate 19 is degreased in the degreasing tank 28, and then the first
In the twisting step A, the material is twisted 90° into a vertical position, then subjected to predetermined processing steps, that is, the painting zone 37 and the baking zone 38, and then twisted 90° in the opposite direction in the second twisting step C. It is then returned to a horizontal position, and then cut into veneers 19' by a cutting machine 59. still,
In the baking zone 38, the sheet metal 19 is conveyed horizontally in a suspended manner by a conveying device, ie, a clip conveyor B.

More specifically, the thin metal plate 19 is fed out in a horizontal direction by a pair of feeding rollers 21 and 22 in a horizontal position. A pair of feed-out rollers 26 and 27 are further arranged in front of the pair of feed-out rollers 21 and 22, and the hole punching machine 23 is arranged between each pair of feed-out rollers. This drilling machine 23 is composed of a female die 23b located below the thin metal plate 19 being fed and a male die 23a located above the thin metal plate 19.
By moving up and down with respect to the female die 23b, a predetermined through hole 25 is continuously made in the thin metal plate 19. The thin metal plate 1 is drawn out forward by the pair of feeding rollers 26 and 27.
9 is introduced into the degreasing tank 28. A solvent 32 is stored in the degreasing tank 28 for cleaning oil components and the like adhering to the surface of the thin metal plate 19. There are three guide rollers 2 in this degreasing tank 28.
9 , 30 , 31 are arranged in a staggered manner, and the thin metal plate 19 is guided in a meandering manner through the solvent 32 by these guide rollers 29 , 30 , 31 to reach the degreasing tank 2 .
8 and is guided to a first horizontal roller 33 located outside.

The metal sheet 19 is guided from the first horizontal guide roller to the first vertical guide roller 34, then to the second vertical guide roller 35, and then sent to the coating zone 37.

In the first twisting step, as shown in FIG. It is deviated from the feed line 1 to one side in the width direction of the thin metal plate 19 by a deviation amount d ₂ . Further, as shown in FIG. 2, the first vertical roller 34 has a height position different from the first horizontal roller 33 by an amount of deviation d ₁ ;
The height position is the same as that of the second vertical guide roller 35. In other words, the first horizontal roller 3
3 is located at a higher position than the other rollers.

In the second twisting process, the attitude change of the thin metal plate 19 is reversed from that in the first twisting process, but the thin metal plate 19 is basically twisted using the same principle. That is, the thin metal plate 19 guided by the third vertical roller 36 corresponding to the second vertical roller 35 in the first twisting step is guided by the fourth vertical roller 55.
From there, it is guided through a second horizontal roller 56 to a pair of horizontal feed rollers 57 and 58. And the first
As best shown in the figure, the fourth vertical roller
Although it is at the same height as the vertical roller 36, it is offset from the feed line l to one side in the width direction of the thin metal plate 19.
It is deviated by d ₃ . In addition, the second horizontal roller 56
As clearly shown in FIG. 2, the vertical rollers 36, 55 are different in height from the third and fourth vertical rollers 36, ₅₅ by an amount of deviation d4, and are located on the feed line l.

The pair of feed-out rollers 57, 58 feed out the thin metal plate 19 forward in synchronization with the feed-out rollers 21, 22; 26, 27.

The cutting machine 59 is composed of a lower die 59b located below the thin metal sheet 19 being fed, and a cutter 59a located above the thin metal sheet 19. The cutter 59a moves up and down to cut a veneer of a predetermined size. 19' is cut. The cut veneers 19' are sequentially sent forward by a conveyor 60.

Details of the twisting of the thin metal plate 19 in the first twisting step and the second twisting step will be described in detail below with reference to FIGS. 7 to 9. Although FIGS. 7 to 9 only show the first twisting process, the second twisting process is essentially the same as the first twisting process, except that the twisting direction of the thin metal plate 19 is reversed. Therefore, the first twisting process will be representatively explained.

Figure 7 corresponds to Figure 1, and Figure 8 corresponds to Figure 2.
Corresponds to the diagram. Further, FIG. 9 shows the state seen from the right side in FIG. 2. In each figure,
The positions of the thin metal plate 19 in the width direction on the first horizontal roller 33 and the first vertical roller 34 are indicated by respective symbols. That is, e, e' are the rollers 33, 34
The points at the center in the width direction of the thin metal plate 19 are shown in FIG.
34 shows both side edges in the width direction of the thin metal plate 19. What should be noted here is that roller 3
3 and 34, the curved lines of e-e' and g-g'f-f' are different, respectively. That is, in FIG. 7, the curved lines f-f ₀ , ee-e ₀ , g-g ₀ are curved between the roller 33 and the approximately intermediate portion L of the thin metal plate 19 (curved reversed portion of the thin metal plate 19). Each radius of curvature becomes smaller in turn. On the other hand, in FIG. 8, contrary to the case of FIG. 7, the curved line g'-
The radii of curvature of g ₀ , e′−e ₀ , and f′−f ₀ become smaller in order. However, the length itself in the longitudinal direction of the thin metal plate 19 is equal to f−f ₀ , e−e ₀ , and g−g ₀ .
Also, f′−f ₀ , e′−e ₀ , and g′−g ₀ are all equal. Therefore, a uniform force is applied to the thin metal plate 19 in its width direction, and wrinkles due to twisting are prevented from occurring. Further, in this embodiment, since the thin metal plate 19 is not restrained by each of the rollers 33 and 34, that is, it is not sandwiched between rollers such as pinch rollers, in FIG.
A part of the thin metal plate 19 is slightly lifted by the roller 34, and in FIG.
Since a portion of the metal plate 9 is allowed to rise above the roller 33, no excessive force is applied to the thin metal plate, and from this point of view, the generation of wrinkles is effectively prevented.

It becomes clearer when compared with the twisting method shown in FIGS. 10 to 12 that the arrangement of the rollers 33 and 34 in the twisting process can absorb the distortion imparted to the thin metal plate 19 well.

The twisting method shown in FIGS. 10 to 12 shows an example in which the thin metal plate 19 is twisted by 90° between a pair of horizontal rollers 62, 62 and a pair of vertical rollers 63, 63. That is, in this example, the horizontal roller 62 and the vertical roller 63 are located on the same feed line and arranged at the same height position. In this example, as shown in the figure, the horizontal roller and the vertical roller are twisted in pairs with the thin metal plate 19 sandwiched therebetween, that is, in a restrained state. In this example, the central curved line e-e' tries to take the shortest substantially vertical distance, but the other curved lines f-
f' and gg' are greatly curved. As mentioned above, the lengths of the thin metal plate 19 itself f-f', ee-e', g
Since -g' has the same size, wrinkles 64 naturally occur in various places. If wrinkles 64 occur in this way, the product becomes unusable, and therefore the first
The twisting methods shown in Figures 0-12 are not practical.

Subsequently, details of the hanging conveyance device, that is, the clip conveyor B installed in the baking zone 38 will be explained based on FIGS. 3 to 6.

FIG. 3 shows the overall configuration of this clip conveyor B. The clip conveyor B according to this embodiment has a circulating drive means, that is, a drive chain 39.
It is of a type in which the metal sheets 19 are circulated along a vertical plane that includes the thin metal plate 19 being conveyed. That is, this clip conveyor B is used to transport thin metal sheets 19.
A plurality of clipping devices 4 are arranged above the clipping devices 4 and move with the circulation drive of the drive chain 39.
0 grips the upper edge of the thin metal plate 19.

The detailed structure of the clip conveyor B will be further explained in detail based on FIG. 3 and FIGS. 4-6. There is a pair of drive chains 39, as clearly shown in FIGS. 4 and 6, and they are driven by a pair of sprockets 24 shown in FIG. 3. A roller 39a is provided at the link joint portion of each drive chain 39.
is interposed. And a pair of sprockets 2
Horizontal guide rails 54 are installed above and below between the sprockets 4 and 24, and each rail 54 supports the roller 39a between the pair of sprockets 24.
The drive chain 39 is made to move horizontally.

Clip devices 40 are mounted between the pair of drive chains 39 at regular intervals. Each clip device 4
0 has a frame 41, and this frame 4
1 is supported between a pair of drive chains 39 and between adjacent connecting pins 53. The above roller 39
A is also attached to the end of this connecting pin 53.
A pair of clip plates 43 are attached to this frame 41 via support brackets 42. The support bracket 42 is provided with four rollers 44 at one end thereof, and these rollers can freely move along a bottom surface 45a within a cavity 45 formed in the frame 41 in the same direction as the direction in which the drive chain 39 extends. That's what I do. The empty space 45 has enough space in the extending direction of the chain 39 to allow the support bracket 42 to move freely in that direction, but the width dimension in the direction perpendicular to the direction is equal to the diameter dimension of each roller 44. The support bracket 42 is slightly larger in size so that the support bracket 42 can hardly move in the perpendicular direction.

The pair of clip plates 43 are attached to the support bracket 4.
2 via a pin 46 so as to be openable and closable. A clip closing spring 47 is interposed between one end of the pair of clip plates 43, and is constantly biased so that the clip end can pinch the thin metal plate 19. A plurality of claws 48 are protruded from the inner surface of the clip end of each clip plate 43, so that the upper edge of the thin metal plate 19 can be securely clamped. Furthermore, the frame 41 is provided with a pair of clip presser arms 4.
9 is pivotally connected by each pin 50, and the arm 4
The free ends of the clip plates 9 are arranged so as to be able to abut against the outer surface of one end of each corresponding clip plate 43. Each arm 49 is always biased by a spring 51, and when the spring is released, each arm 49 releases each clip plate 43. On the other hand, in FIG.
A pair of clip release rails 52a for urging the clip holding arms 49 of each clipping device 40 inward are arranged in front of the metal plate delivery end _D2 of the grip area D for gripping the metal sheet. A clip opening holding rail 52b having the same function as the clip release rail 52a of each clip device 40 is arranged on the near side of the penetration end _D1 of the grip area D.

Clip conveyor B having the above configuration operates as follows.

In the thin metal plate gripping area D, each clipping device 40 securely grips the thin metal plate 19 fed in a vertical position with the claws 48 at the clip ends of the pair of clip plates 43, as shown in FIG. Send horizontally. And the clip release rail 5
2a, the pair of rails 52a gradually press each clip presser arm 49 inward from the outside as shown in FIG. The free end of each arm 49 is then connected to the corresponding clip plate 4.
3 is pressed inward, so that the clip end of each clip plate 43 is pressed against the thin metal plate 19.
to release. Although the pair of clip release rails 52a and the clip opening holding rails 52b may be connected in series, in this embodiment,
The two are not connected. Therefore, when each clip device 40 passes the clip release rail 52a, its pair of clip plates 43 will close again. However, as the drive chain 39 rotates further, each clip device 40 approaches the clip opening holding rail 52b, which again opens its clip plate 43. Each clip device 40 is carried to the thin metal plate penetration end _D1 with its clip plate 43 opened. As clearly shown in FIG. 3, the pair of clip plates 43 are positioned to sandwich the upper edge of the thin metal plate 19 in front of the thin metal plate insertion end _D1 . That is, the upper edge of the thin metal plate 19 is positioned between the pair of clip plates 43 held open. When each clip device 40 comes off the rail 52b, each clip presser arm 49 is released and released by the spring 51. As a result, the pair of clip plates 43 are biased by the clip closing spring 47, and the claws 48 at the ends of the clips grip the thin metal plate 19 at its upper end.

As described above, each clip device 40 feeds the metal sheet 19 forward in the horizontal direction while suspending the metal sheet 19 carried in in a vertical position. Of course, the moving speed of this clip conveyor B is the same as that of the feeding rollers 21, 22; 26, 27; 57,
It is synchronized with 58.

By the way, in the baking zone 38, high heat is applied to the thin metal plate 19, so the thin metal plate 19 undergoes considerable thermal expansion.
A support bracket 42 supporting the frame 41
Since the drive chain 39 is freely movable in the extending direction of the drive chain 39, even if the thin metal plate 19 thermally expands in the longitudinal direction, the clip plate 43 continues to grip the thin metal plate 19 and moves horizontally according to this thermal expansion. do. In other words, the dimension between the clip plates of adjacent clip devices 40 can be freely changed according to the thermal expansion of the thin metal plate 19. Therefore,
The sheet metal does not bend due to thermal expansion and therefore does not become distorted or wrinkled.

As detailed above, according to the above embodiment, the first
In the twisting process A and the second twisting process C,
Each thin metal plate 19 can be twisted approximately 90 degrees without wrinkles, and therefore, while the thin metal plate 19 can be conveyed in a vertical position and in a horizontal direction during the painting and baking process, it is horizontal before and after the process. It can be transported horizontally in this position. In the baking process, the clip plate 43 of each clip device 40 holding the thin metal plate 19 can freely move with respect to its frame 41 or drive chain 39 even though the thin metal plate 19 undergoes thermal expansion. As a result, thermal expansion can be absorbed and the occurrence of bending and wrinkles in the thin metal plate 19 can be effectively prevented, thereby achieving the intended technical object of the present invention.

[Brief explanation of drawings]

1 to 9 show embodiments of the present invention;
The figures are a plan view and a side view showing the coating equipment to which the method of the present invention is applied, Fig. 3 is a side view of the clip conveyor B, Fig. 4 is a sectional view of main parts taken along the line of Fig. 3, and Fig. 5 is a 6 is a cross-sectional view of main parts of FIG. -12 show another twisting method according to a comparative example with respect to the twisting process according to the present invention, FIG. 10 is a perspective view thereof, and FIG. 11 is a first twisting method.
Figure 0 is a view seen in the direction of arrow XI, Figure 12 is an explanatory diagram showing the twisted state of the thin metal plate 19 with the rollers 62 and 63 removed from Figure 11, and Figure 13 is a diagram showing the conventional painting process and painting equipment. It is a schematic side view. 19...Thin metal plate, 19'...Single plate, 20...
Heart tube, 21, 22... Feeding roller, 23...
Drilling machine, 23a...male type, 23b...female type, 2
4...Sprocket, 25...Through hole, 26,2
7... Feeding roller, 28... Degreasing tank, 29,
30, 31... Guide roller, 32... Solvent, 33
...first horizontal roller, 34...first vertical roller,
35... Second vertical roller, 36... Third vertical roller, 37... Painting zone, 38... Baking zone,
39... Drive chain, 39a... Roller, 40
...Clip device, 41...Frame, 42...
Support bracket, 43...Clip plate, 44...
Roller, 45...Empty room, 45a...Bottom, 46...
...Pin, 47...Clip closing spring, 48...
Nail, 49...Clip holding arm, 50...Pin, 51...Spring, 52a...Clip release rail, 52b...Clip holding rail, 53...
Connection pin, 54...Horizontal guide rail, 55...Fourth vertical roller, 56...Second horizontal roller, 57,
58... Feeding roller, 59... Cutting machine, 59
a...Cutter, 59b...Lower mold, 60...Conveyor, 62...Horizontal roller, 63...Vertical roller, 64...Wrinkle, A...First twisting step, B...
Clip conveyor, C...Second twisting process, D
...Thin metal plate gripping area, D ₁ ...Thin metal plate penetration end,
D ₂ ...Metal thin plate delivery end, d ₁ , d ₂ , d ₃ , d ₄ ... Displacement distance, e, e'... Center, f, f', g,
g'...end, l...feed line, L...middle part.

Claims (1)

[Scope of Claims] 1. A plurality of clip devices for suspending and gripping the upper edge of a continuous long thin metal sheet in a vertical position are driven to circulate at regular intervals, and at least each clip is The apparatus is a continuous long thin metal plate hanging and conveying apparatus that allows the apparatus to move horizontally, and each of the above clipping apparatuses includes a frame fixed to a circulation drive means such as an endless chain;
The frame is provided with a pair of clip plates for gripping the thin metal plate, which are provided to be freely movable in the horizontal direction and immovable in the vertical direction in the thin metal plate gripping area, and the pair of clip plates are configured to hold the thin metal plate in the thin metal plate gripping area. A continuous elongated thin metal plate hanging and conveying device characterized in that the upper end of the thin metal plate is gripped at the thin metal plate entry end of the gripping area, and the metal thin plate is released at the metal thin plate delivery end of the metal thin plate gripping area. 2 The pair of clip plates are suspended from the frame via a support bracket, and the bracket is attached to the frame so that it can move freely in the horizontal direction and not move in the vertical direction in the area for gripping the thin metal plate. 2. The device according to claim 1, characterized in that: