JPH02106546A - Continuous long metallic sheet suspending conveying device - Google Patents

Abstract

PURPOSE:To absorb elongation of a sheet due to thermal expansion by a method wherein a clip device for grasping a sheet is provided with a clip plate for grasping being movable in a horizontal direction in a grasping region and immovable in a vertical direction, and the sheet is grasped and ungrasped by a protruding and retracting end in the grasping region. CONSTITUTION:A horizontal guide rail 54 is provided between the sprockets of a clip conveyor, and rollers 39a of a drive chain 39 are supported for horizontal movement. Clip devices 40 are mounted at equal intervals between a pair of the drive chains 39. A frame 41 supported between adjoining coupling pins 53 is mounted to the clip device 40, and a pair of clip plates 43 are mounted to the frame 41 through a support bracket 42. The support bracket 42 is provided with four rollers 44, and are freely movable in the extension direction of the chain 39 along a bottom surface 45a in an empty chamber 45 of the frame 41. Thus, even when a sheet 19 the upper end of which is grasped between clip plates 43 in a grasping region is thermally expanded, the support bracket 42 is moved to absorb the thermal expansion.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suspended conveyance system for transporting a thin metal sheet in a horizontal direction while holding it in a vertical position during the process of performing surface processing (for example, painting) on a thin metal sheet. Regarding equipment.

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 this conventional method, the thin metal sheet wound into a coil is not processed in a continuous state, but the thin metal sheet is pre-cut into the specified product dimensions before being processed. This is a method in which predetermined processing is performed on the cut veneer.

To explain in detail with reference to FIG. 13, 1 is a long thin metal plate to be processed, and is wound around the core tube 2 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 die 6 to sequentially cut the long thin metal plate l into veneers l having the dimensions of the final product. A conveyor 7 sequentially sends the vinyl veneers cut by the cutter 5 forward. The processing process is temporarily stopped here, and then the veneer 1 is degreased,
The process is done in the following order: drying, painting, and baking. In the figure, I
O, +2, 13, and 14 respectively indicate a degreasing tank, a drying zone, a painting zone, and a baking zone. Reference numeral 8 denotes a hanger conveyor, which circulates a circulation drive means such as an endless chain between the degreasing tank IO 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 from the hangers 9.

Each veneer 1゛ suspended and conveyed by the circulation drive means,
It passes through the solvent 1 in the degreasing tank IO, and then is transported to the drying zone 12, the painting zone 13 and the baking zone 14. The veneer sheet carried out from the baking zone I4 is sent to the next process (not shown).

Normally, this veneer is manually removed from the hanger 9 by a factory worker, as in the former case.

The above conventional example shows six very simple processes, but according to other conventional examples, the degreasing process is performed independently between the thin metal plate cutting process and the processing process below the drying zone. In some cases, there may be a hole-drilling process before the metal sheet cutting process.

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, it is necessary to immerse each veneer in a degreasing tank or hang each veneer on a hanger 9, which requires a lot of labor. There is a problem in that it requires In addition, as mentioned above, if individual vinyl veneers are transported while suspended from the hanger 9,
Since the veneer l swings, in order to prevent adjacent veneers from coming into contact with each other, the distance between adjacent hangers must be made considerably large, and the process length in the feeding direction of the thin metal plate is therefore long. There is a problem with becoming. Furthermore, in order to reduce the shaking of the vinyl veneer, it is necessary to reduce the speed of the conveyor considerably, which poses the problem of poor production efficiency and high costs. Furthermore, as mentioned above, when each veneer plate 1 is hung on the hanger 9, the curvature of the coil or the holes created during the press process appear, causing the tIi plate 1 to deform. , there is a problem that local variations in quality occur during the painting and baking processes.

The cause of the various problems mentioned above is that the continuous metal thin plate 1 is cut in advance into veneers 1', and predetermined processing is performed on the veneer 1'. Therefore, in order to solve the above-mentioned problems, each process should be performed while the thin metal plate l remains continuous, but this continuous process has conventionally been considered impossible.

That is, in the degreasing process and hole 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, in the cutting process, the cutter 5 is normally driven in the vertical direction, and the cutter 5 is not normally moved in the horizontal direction to cut a thin metal sheet in a vertical position. 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. However, if the paint is sprayed on the thin metal plate in a horizontal position, the excess paint on the upper surface will not flow down and cause uneven coating, so it is not practical. isn't it.

Therefore, in order to perform a specified processing on a thin metal sheet in a continuous state, the thin metal sheet is fed in a vertical position and horizontally in a specified processing step, while the thin metal sheet is Before and after the processing process, the metal sheets are separated by 90 mm so that they are fed horizontally in a horizontal position.
° Requires twisting. 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 inventor has discovered that while a thin metal sheet is fed vertically and horizontally in a predetermined processing step, without causing distortion such as wrinkles in the thin metal sheet, In the front and back processes, we have completed a technology that allows the thin metal plate to be fed horizontally and in a horizontal direction.

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

Technical Problems of the Present Invention Accordingly, the technical problem to be solved by the present invention is to absorb the deformation of the thin metal sheet caused by thermal expansion caused by the heat applied in the processing step by moving the thin metal sheet in a vertical position in the above 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, Actions and Effects) 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 plate in a vertical posture are driven to circulate at regular intervals, and each clipping device is moved horizontally at least in the thin metal sheet gripping area. A frame fixed to each clip device with respect 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 plate, which are provided in a manner that the metal thin plate is not allowed to be gripped, and the pair of clip plates are used to grip the upper end of the metal thin plate at the metal thin plate entry end of the metal thin plate gripping area, and to carry out the metal thin plate from the metal thin plate 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 top seam 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.

Accordingly, the thin metal sheet can be fed straight and horizontally 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 An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 9. This example shows an example in which the method of the present invention is applied to painting equipment.

Figure 1.2 shows the entire coating equipment. FIG. 1 is a plan view, and FIG. 2 is a side view.

The continuous long thin metal plate 19 to be processed is wound in a coil around eight tubes 20, and is sequentially moved approximately horizontally from one end of the feed line Q in FIG. 1 to the other end along the feed line Q. During the feeding, a hole is first punched by a machine 23, and then a degreasing tank 28 is used.
The surface of the metal sheet I9 is degreased at , and then twisted by 90" in a first twisting step A into a vertical position, and then subjected to a predetermined processing step, namely the coating zone 37
Then, in the second twisting step C, the veneer is twisted 90° in the opposite direction and returned to the horizontal position, and then cut into 19° pieces by the cutting machine 59. There is. In the baking zone 38, the thin metal plate 19 is conveyed in a horizontal direction while being suspended and supported by a conveying device, that is, 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 delivery rollers 26 and 27 are further arranged in front of the pair of delivery rollers 21 and 22, and the hole punching machine 23 is arranged between each pair of delivery rollers. This hole punching machine 23 is the thin metal plate I9 to be fed.
It is composed of a female die 23b located below the metal plate 19 and a male die 23a located above the thin metal plate 19. By moving the male die 23a up and down relative to the female die 23b, a predetermined through hole is formed in the thin metal plate 19. 25 are opened continuously. The thin metal plate 19 is drawn forward by the pair of feed rollers 26 and 27 and guided 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 29.3 in this degreasing tank 28.
0.31 are arranged in a 1,000-1 pattern, and the thin metal plate 19 is guided in a meandering manner through the solvent 32 by these guide rollers 29 and 30. is leading to

The sheet metal I9 is guided from the first horizontal guide roller to the first vertical guide roller 34 and then to the second vertical guide roller 35 before being sent to the bipedal coating zone 37.

In the first twisting step, as shown in FIG.
The vertical roller 34 is offset from the feed line a by an amount d to one side in the width direction of the thin metal plate 19. Moreover, this first vertical roller 34 is a first vertical roller 34, as shown in FIG.
The height position is different from that of the horizontal roller 33 by the amount of deviation d1, while the height position is the same as that of the second vertical guide roller 35. In other words, the first horizontal roller 33 is provided at a higher position than the other rollers.

In the second twisting process, the attitude change of the thin metal plate 19 is reversed to that in the first twisting process, or the thin metal plate 19 is twisted using basically 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 passes from the fourth vertical roller 55 to the second horizontal roller 56 and then to the pair of horizontal feeding rollers 57, 5. leading to g. As clearly shown in FIG. 1, the fourth vertical roller is located at the same height as the third vertical roller 36, but is displaced from the north feed line Q by an amount d3 in the width direction of the thin metal plate 19. It's deviated. The second horizontal roller 56 is also connected to the third horizontal roller 56, as best shown in FIG. It is located on the feed line Q, which is different from the fourth vertical rollers 36 and 55 by the amount of deviation d4 in height position.

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, and 27.

The cutting machine 59 is composed of a lower mold 59b located below the thin metal sheet 19 being fed, and a cutter 59a located above the thin metal sheet 19. By moving the cutter 59a downward by -L, the cutter 59 cuts a predetermined size. Veneer +9' is cut. The cut veneers 19° are sequentially sent forward by a conveyor 60.

Details of the twisting of the metal thin 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.

7 corresponds to FIG. 1, and FIG. 8 corresponds to FIG. 2. 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 and e' indicate the points at the center of the width direction of the thin metal plate 19 on each roller 33 and 34, and symbols g and g': r and f' indicate the point on the roller 3, respectively.
3 and 34, both side edges in the width direction of the thin metal plate 19 are shown. What should be noted here is that the curved lines of ee and gg'f-f' are different between the rollers 33 and 34, respectively. That is, in FIG. 7, a curved line f-fo is formed between the roller 33 and the approximately middle portion L of the thin metal plate 19 (curved reversed portion of the thin metal plate 19).

The radii of curvature of e eo and g go become smaller in order. On the other hand, in FIG. 8, contrary to the case of FIG. 7, the radius of curvature of the curved lines g' go, e' co, and f'I'o becomes smaller in order at approximately the middle between the roller 34 and the thin metal plate 19. It has become. However, the length itself of the thin metal plate 19 in the longitudinal direction is rto, e eo, g
g.

Both are equal, and r''-to, e'-e., g'-g.

are both equal. Therefore, a uniform force is applied to the thin metal plate 19 in the middle 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 pinched by rollers such as pinch rollers, a part of the thin metal plate 19 is shown in FIG. Since it is allowed that the thin metal plate 19 is slightly lifted from the roller 34, and in FIG. Generation of wrinkles is effectively prevented. Comparing with the twisting method shown in FIGS. 10 to 12, it is clear that the arrangement of the rollers 33 and 34 in the twisting process can better absorb the distortion imparted to the thin metal plate 19. It becomes clear.

In the twisting method shown in FIGS. 1O to 12, the thin metal plate 19 is
, 63. In other words, in this example, the horizontal roller 62 and the vertical roller 63 are located on the same feed line and are arranged at the same height. As shown in the figure, the horizontal and vertical rollers are twisted in pairs with the thin metal plate I9 sandwiched between them, that is, in a restrained state.In this example, the central curved line ee' is the shortest substantially straight line. I try to keep my distance, but other curved lines [-r゛ and g-g
' is greatly curved. As described above, since the lengths r-r', ee', and gg' of the thin metal plate 19 are the same, @64 naturally occurs at various locations. If the wrinkles 64 occur in this way, the product is useless, and therefore the twisting method shown in FIGS. 1O to 12 is 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 structure of this clip conveyor B. The clip conveyor B according to this embodiment is of a type in which a circulating drive means, ie, a drive chain 39, is circulated along a vertical plane containing the thin metal sheet 19 to be conveyed. That is, this clip conveyor B is arranged above the thin metal plate 19 being conveyed, and is connected to the drive chain 3.
A plurality of clip devices 4 move with the circulation drive of 9.
0 grips the upper edge of the thin metal plate 19.

The detailed structure of clip conveyor B is shown in Figure 3 and Figures 4 to 4.
This will be explained in further detail based on FIG. The drive chain 39
exist in pairs, as shown in Figure 4.6, and the third
It is driven by a pair of sprockets 24 shown in the figure. A roller 39a is interposed at the link connection portion of each drive chain 39. Then, horizontal guide rails 54 are installed above and below between the pair of sprockets 24 and 24, and the rollers 39a are supported by each rail 54 between the pair of sprockets 24, so that the drive chain 39 is moved horizontally. ing.

Clip devices 40 are mounted between the pair of drive chains 39 at regular intervals. Each clip attachment 40 is attached to frame 4
1, and this frame 41 is supported between a pair of drive chains 39 and between adjacent connecting pins 53. The roller 39a is also attached to the end of the connecting pin 53. This frame 41 has a support bracket 42
Through 1. A pair of clip plates 43 are attached thereto. The support bracket 42 is provided with four rollers 44 at one end thereof, which rollers fill the cavities 45 formed in the frame 41.
The drive chain 39 can freely move along the inner bottom surface 45a in the same direction as the direction in which the drive chain 39 extends. Note that the empty space 45 is provided with a support bracket 4 in the extending direction of the chain 39.
2 has enough space to freely move in the direction, but the width dimension in the direction perpendicular to the direction is
The diameter of the support bracket 42 is slightly larger than the diameter of the support bracket 42, so that the support bracket 42 can hardly move in the perpendicular direction.

The pair of clip plates 43 are connected to one end of the support bracket 42 via a pin 46 so as to be openable and closable. and,
A clip closing spring 4 is provided between one end of a pair of clip plates 43.
7 is interposed between the ends of the clip and the thin metal plate 19 is constantly biased. 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 pinched. moreover,
A pair of four clip holding arms are pivotally attached to the frame 41 by respective pins 50, and the free ends of the arms 49 are arranged so as to be able to abut one end outer surface of each corresponding clip plate 43. Each arm 49 is always biased by a spring 51, and when the spring is released, each clip plate 43 is released. On the other hand, in FIG. 3, the clip holding arm 4 of each clip device 40 is located in front of the metal plate delivery end in the grip area that grips the thin metal plate 19.
A pair of clip release rails 52a are arranged to bias the clips 9 inward, and the clip release rails 52a and A clip opening holding rail 52b having the same function is arranged.

Clip conveyor B having the above configuration operates as follows.

In the area where each clip device 40 grips a thin metal plate,
As shown in FIG. 6, the metal thin plate 19, which is being fed vertically, is reliably gripped by the claws 48 at the clip ends of the pair of clip plates 43 and fed horizontally. When the clip release rails 52a are reached, the pair of rails 52a gradually press each clip presser arm 49 from the outside to the inside, as shown in FIG. The free end of each arm 49 will then press the end of the corresponding clip plate 43 inwardly, thereby causing the clip end of each clip plate 43 to release the metal sheet 19. A pair of clip release rails 52a and clip open holding rails 52
b may be connected in series, but in this embodiment, they are not connected. Therefore, once each clip device 40 passes the clip release rail 52a,
The pair of clip plates 43 will be closed again.

However, as the drive chain 39 circulates further, each clip device 40 approaches the clip opening holding rail 52b, which opens its clip plate 13 again. Each clip device 40 has its clip plate 43
is carried to the thin metal plate insertion end D1 in an open state. 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 D+. That is, the upper edge of the thin metal plate 19 is positioned between the pair of clip plates 43 held open. Each clip device 40 has a rail 52
When b is removed, 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 upper end of the thin metal plate I9.

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. However, the moving speed of this clip conveyor B is the same as that of the feeding rollers 2+, 22.
．． It is synchronized with 26, 27, 57, and 58.

By the way, in the baking zone 38, the thin metal plate 1
Since high heat is applied to the metal sheet 9, the thin metal plate 19 will undergo considerable thermal expansion. Since the clip plate 43 is freely movable in the extending direction, even if the thin metal plate 19 thermally expands in the longitudinal direction, the clip plate 43 moves horizontally according to this thermal expansion while holding the thin metal plate 19.

That is, the distance 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 metal sheet does not bend even when thermally expanded, and therefore does not become distorted or wrinkled.

As described in detail above, according to the above embodiment, in the first twisting process A and the second twisting process C, the metal thin plate 1
9 can be twisted approximately 90° without wrinkles, and therefore,
In the painting and baking process, the thin metal plate 19 can be conveyed horizontally in a vertical position, while it can be conveyed horizontally in a horizontal position before and after the process.

In the baking process, the clip plate 43 of each clip device 40 that holds the thin metal plate 19 moves freely relative to its frame 41 or drive chain 39 despite the thermal expansion of the thin metal plate 19. By doing so, it is possible to absorb thermal expansion and effectively prevent the occurrence of bending or wrinkles in the thin metal plate 19, thereby achieving the intended technical object of the present invention.

[Brief explanation of the drawing]

1 to 9 show examples of the present invention, and FIGS. 1 and 2 are plan and side views showing coating equipment to which the method of the present invention is applied,
Figure 3 is a side view of clip conveyor B, and Figure 4 is a side view of clip conveyor B.
Figure [V-IV line sectional view of the main part, Figure 5 is a side view of the V arrow in Figure 4, Figure 6 is the sectional view of the main part of Figure 3, Figure 7.8.9 is the first twist 1O to 12 are plan views, side views, and front views for explaining twisting in the process, and show another twisting method according to a comparative example to the twisting process according to the present invention, and FIG. Fig. 2 is a view of Fig. 1θ°C viewed from the arrow direction, Fig. 12 is a view of the roller 62,
An explanatory diagram showing the twisted state of the thin metal plate 19 excluding 63,
FIG. 13 is a schematic side view showing a conventional painting process and painting equipment. 19...Metal thin plate, 19°...Single plate, 20...Hard work, 21.22...Feeding roller, 23...Drilling machine, 23a...Male mold, 23b...・Female type, 24...
・Sprocket, 25...Through hole, 26.27...
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 board, 44...Roller, 45...Vacant room,
45a...Bottom surface, 46...Pin, 47...Clip closing spring, 48...Claw, 49...Clip holding arm, 50...Pin, 51 Spring, 52a...Clip release rail , 52b・Clip holding rail, 53
...Connecting pin, 54...Horizontal guide rail, 55 4th
Vertical roller, 56...Second horizontal roller, 57.58...
Feeding roller, 59...cutting machine, 59a cutter,
59b...lower mold, 60...conveyor, 62...horizontal roller, 63...vertical roller, 64...wrinkle, A-first
Twisting process, B - Clip conveyor, C second twisting process, D... Thin metal plate gripping area, Dl... Thin metal plate entry end, D,... Thin metal plate delivery end, d,, d2. d3
．． cl, - deviation amount separation distance, e, e'-"center f,
f, g, g...end, Q...feeding line, L...
・Middle part. Patent applicant: Hirano Giken Kogyo Co., Ltd. Agent
Patent attorney Aoyama Ao and two others Figure 3 IA Otsu

Claims (2)

[Claims] (1) A plurality of clipping devices for suspending and gripping the upper edge of a continuous long thin metal sheet in a vertical posture are cyclically driven at regular intervals, and each clipping device is moved horizontally at least in the thin metal sheet gripping area. Each of the above-mentioned clip devices includes a frame fixed to a circulating drive means such as an endless chain, and a holding area for the thin metal plate with respect to the frame. a pair of clip plates for gripping a thin metal plate, which are provided to be freely movable in the horizontal direction and immovable in the vertical direction, and the pair of clip plates are provided with:
Continuous long thin metal plate suspension transportation characterized in that the upper end of the metal thin plate is grasped at the metal thin plate entry end of the metal thin plate gripping area, and the metal thin plate is released at the metal thin plate delivery end of the metal thin plate gripping area. Device. (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 the clip plates can be freely moved horizontally in the thin metal plate gripping area but cannot be moved vertically. 2. The device according to claim 1, characterized in that it is worn.