JPH0665414B2 - Curved waveform sheet, and method and apparatus for manufacturing the same - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a curved corrugated sheet or plate having a shape having a top portion, a side portion and a bottom portion. The present invention also relates to a method of manufacturing a curved corrugated sheet or plate and a bending apparatus therefor. For the sake of simplicity, various features of the present invention will be described in association with a sheet.
It should be understood that means also a plate.

The invention relates in particular to the processing of corrugated metal sheets with trapezoidal undulations in cross section, preferably of aluminum or its alloys. However, the present invention can also be applied to sheets of steel or the like.

Such sheets are used in the production of large diameter tubes, roof construction, etc.

[Problems to be solved by conventional technology and invention]

Conventional bending devices used for the above purposes are often
For example, bending a relatively thin sheet to a small radius of curvature,
Alternatively, when a trapezoidal corrugated sheet is bent, a fold or a wrinkle is generated, or a crack or the like is generated in the sheet, resulting in a defective product. This damage such as cracking of the sheet was caused by excessive pulling on the convex side of the curved sheet during bending, and conversely, the base material became excessive on the concave side, resulting in overhang.

[Object of the Invention]

Therefore, the first object of the present invention is to: a) be strong in the longitudinal direction, b) withstand a large stress or tensile force even when bent with a small radius of curvature or very thin, and c) cracks, folds, etc. The object of the present invention is to provide a curved corrugated sheet that does not cause deformation. Another object of the present invention is to provide a method and an apparatus capable of reliably bending a corrugated sheet with a small radius of curvature without forming deformation or cracks in the sheet to form a thin sheet. For example, it is possible to carefully bend a sheet which has been surface-treated by applying enamel or paint so as not to damage the coating.

[Means for solving problems]

In order to achieve the above first object, the present invention provides a trapezoidal protrusion having a cross-sectional shape having undulations that are alternately continuous in a state where the protrusions are opposite to each other by the side portions located between them. The sheet having is curved and formed around the axis perpendicular to the longitudinal direction of the undulations and along the lateral width direction, and heads toward the top of the protruding portion that protrudes toward the inside of the curve and toward the bottom that protrudes toward the outside of the curve. A curved corrugated sheet is provided which is characterized in that convex ribs projecting in the direction are formed.

And claim 2. ~ 4. The manufacturing apparatus according to claim 5 and claim 5. Other objects can be achieved by the manufacturing method described in (1).

[Action]

By forming the ribs, it is possible not only to prevent the substrate from dangling on the concave side of the curved sheet, but also to disperse it on the convex side to effectively reduce the tension on the convex side.

In other words, by imprinting the groove, it is possible to conveniently disperse the surplus base material on the convex side of the curved sheet, which causes damage such as cracking of the sheet, so that it is possible to prevent the occurrence of the aforementioned cracks and twists. It will be.

〔The invention's effect〕

Therefore, it was possible to provide a corrugated sheet having a good curved shape without cracks or looseness.

As a result, when the metal sheet is bent, it can be carefully processed without damaging the sheet itself or the surface coating such as paint, or it is possible to bend a thin sheet without any trouble.

〔Example〕

Next, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 to 5, the device of the present invention is mainly composed of three rolls 1, 2, and 3. As is clear from FIG.
Two similar rolls 1, 2 are juxtaposed substantially horizontally side by side. The shape of the rolls 1, 2, 3 substantially corresponds to the shape of the curved sheet, in particular the trapezoidal shape of the corrugated metal sheet 4 as shown in FIG. In cross-sectional view, the trapezoidal undulations of the sheet are composed of the top 5, side 6, and bottom 7. As shown, the top 5 and bottom 7 may be of the same shape and symmetrical.

As described above, the peripheral surfaces of the rolls 1, 2, and 3 correspond to the shape of the sheet. Therefore, the lower rolls 1 and 2 have a trapezoidal top 5 ", a trapezoidal side 6", and a trapezoidal bottom 7 ", while the rolls 3 located above are, conversely, trapezoidal bottom 5 ', trapezoidal side 6". ', Has a trapezoidal top 7'.

Grooves 8 having a shallow round cross-section are formed on the top surfaces of the lower rolls 1 and 2 in the circumferential direction. This groove has, for example, a depth of 2
It is -5 mm and the width is 10-40 mm. Actually, the depth is 3mm,
The width is preferably 27 mm. The flat top surface on each side of the groove 8 has a width of 4 mm.

The upper roll 3 engages with at least one of the lower rolls 1 and 2, and a ridge 9 that engages with the groove 8 is formed on the bottom portion 5'of the circumferential direction thereof. A sufficient spacing is provided between the opposing roll surfaces so that the sheets can pass between the rolls without damage, including the ridges 9 and the grooves 8 that engage each other.

As shown in FIGS. 1-3, rolls 2 and 3 are located close to each other with a distance substantially corresponding to the thickness of the sheet passing between them. Fig. 1 shows rolls 2 and 3
FIG. 6 is a view of a roll unloading side in a direction orthogonal to a plane passing between the axes of the rolls. On the other hand, the roll 1 is located at a certain distance from the roll 3. When the position of the roll 1 is changed up and down, the degree of curvature of the sheet 4 when passing between the rolls 1, 2 and 3 changes.

Although only the upper roll 3 is driven in this embodiment, any number of rolls may be driven. Further, the number of rolls used may be four or more. For example, five rolls or two roll sets similar to the third roll set may be used. In this case, the first set will cause the seat to be slightly bent, and the other sets will make it more surely bent.

At least one roll, preferably all rolls 1 to
3, the position can be adjusted vertically. This is done by means of fixing screws and a bearing block or housing which is movable along a groove extending in the vertical direction. The direction of this roll position adjustment is indicated by the arrow 12 in FIG.

With the above apparatus, a continuous groove is impressed on the curved concave side top portion 5 of the sheet shown in FIG. 2, and as a result, the rib 10 is formed on the opposite convex side. This will strengthen the curved corrugated sheet. By imprinting the groove, it is possible to prevent excessive tension on the convex surface side of the curved sheet, which causes damage such as cracking of the sheet, and at the same time, to conveniently disperse the surplus base material on the concave surface side. Otherwise, cracks and twists will occur. In other words, the formation of the ribs 10 not only prevents the base material from dangling on the concave surface side of the curved sheet, but also disperses the base material on the convex surface side, which can considerably reduce the tension on the convex surface side. Such pulling also results from the resistance on the concave side, but this resistance does not occur during bending according to the present invention.

Therefore, according to the invention, when bending a metal sheet, it can be carefully processed without damaging the sheet or the surface coating of enamel or paint. And 0.5-0.7mm
It is possible to safely bend a relatively thin sheet with a thickness of. In the bending step shown in FIG. 3, it is desirable to support the leading end side of the bent sheet by an appropriate means.
In particular, in the case of a long sheet, it is desired to lift or support the leading end side so that the curved state is not lost due to its own weight. Losing the curve results in a different result than the desired curvature, and worse, folds and wrinkles that make the seat unusable.

The device of the present invention can bend the sheet to virtually any curvature. Therefore, it is easy to bend the sheet into a perfect circle.

The sheets produced according to the present invention can be used for many purposes. For example, it can be used as a roofing material for a building such as a bicycle parking lot, and the roof of this sheet can be sufficiently self-supported, and does not require a supporting material such as braces or columns. In addition, this sheet can withstand heavy loads such as snowfall, storms, and strong winds. All that is needed are fasteners such as screws, rivets, etc., by which the seat's free ends and side edges can be properly fixed to the building components, and the seat will actually be solid and uniform. It is able to withstand any load it may experience.

The corrugated sheet manufactured according to the present invention can also be used for a roof having a double structure. In this case, the second corrugated sheet may be provided concentrically with the concave side of the outer first corrugated sheet. Matching the curvatures of the two sheets is easy because it can be achieved by only slightly adjusting the spacing between the upper roll 3 and the lower rolls 1,2. A supporting material, a heat insulating material and the like may be interposed between the sheets thus stacked. In this way, a polymer structure having high stability can be revealed by using a very thin sheet, and the heat insulating effect is also high.

The embodiments shown in FIGS. 1-5 can be modified within the scope of the invention. For example, the present invention can be applied not only to a corrugated sheet having a trapezoidal shape but also to a sinusoidal or other undulating sheet. And in the case of a trapezoidal shaped sheet, the top 5,
The connecting portion between the side portion 6 and the bottom portion 7 may be rounded without being bent. Optionally, the sheet may be made of plastic rather than metal, in which case it may be provided with means for heating the roll and / or the sheet.

Further, the bending apparatus of the present invention does not require the sheet to be bent upward, and the roll set of FIG. 3 may be inverted.
This has the advantages associated with supporting the sheet on the exit side of the roll. Such a configuration is particularly suitable for bending a short sheet or bending a large curvature.

The function of the first roll 1 is to determine the curvature of the sheet to be curved and not to have a circumferential groove 8. Groove 8
Is required when the roll 1 makes a definite curve in the vicinity of the roll 3 and when the sheet bends in two steps and the ribs 10 are formed on the top 5 in the first step.

The sheets produced according to the invention can be easily stacked and transported, or they can also be stood with their side edges down and pushed side by side with respect to each other. No matter how many sheets are put together, there is no fear of deformation due to bending or the like.

FIG. 5 shows the shape of the corrugated sheet that has passed through the rolls 1 to 3. In this shape, the top portion 5 faces the concave side of the curved sheet, and the crest of the rib 10 imprinted on the top portion faces the convex side. Both sides of the rib 10 have not been deformed, have the same shape as the top before the bending process, in this case flat,
The top 11 remains.

FIG. 6 is an enlarged side view of the sheet of FIG. 5, in which the dimension in the thickness direction of the sheet is made larger than the actual size for the sake of illustrating the invention.

7 to 9 are views showing sheets of various shapes, and all of these sheets are curved according to the present invention.

Figures 10 and 11 show an apparatus according to the invention for bending a corrugated sheet. The device comprises a stand 14, the side walls 16 of the stand being connected to each other at the bottom by two parallel beams 18. A box beam 20 that can move up and down in a longitudinal groove 22 is provided on the upper portion of the stand 14, and the box beam 20 is formed by a set screw 24 and a lock nut 26 in cooperation with each other.
It can be fixed in any desired position. Set screw 24 is on both side walls 16
It penetrates through a hole of a lug 28 extending at a right angle from the upper end (only one is shown) and engages with a screw hole formed at the upper end of the beam 20.

The side wall 16 of the stand 14 is provided with a bearing block for each roll 1, 2, 3 or a mounting seat for the housing 34, 36. Each bearing block 34, 36 has a lateral set screw 38
A vertical set screw 40 is provided. The need for roll alignment may vary depending on the construction of the device. For example, only the vertical adjustment is required for the upper bearing block 36, and the lateral adjustment is for the lower bearing block 36.
May be needed only for 34. These position adjustments can be performed by known means.

In the illustrated embodiment, the upper roll 3 is driven by a drive device including a gear 44 and a gear motor 46 attached to the shaft. A gear rod 44 pull rod (not shown) is attached to a lug 48 attached to one sidewall.

Sidewalls to bend the sheet without applying excessive tension
Adjustable support of the roll by only 16 would be sufficient. However, a support roll can be provided to counteract the tendency of the roll to flex outwards in the central portion when sheet bending requires greater force.

FIG. 10 is a cross-sectional view taken along the vertical center line of this device. The upper drive roll 3 is supported by two pairs of support rolls 50, and the lower rolls 1 and 2 are supported by a pair of support rolls 58. The upper support roll 50 is horizontally adjusted by a set screw 54 in a horizontal shaft 52.
Is attached to. The shaft 52 is fixed in a selected vertical position via a bracket 56 attached to the beam 20.

Upon contact with the roll 3, the support roll 50 is once pushed outwards towards the adjusting nut 54 'of the set screw 54. Then, by tightening the nut 54 ', the support roll 50 presses the upper roll 3 with a necessary force to determine the vertical position of the upper roll 3. The approximate position of the support roll 50 is set by a set screw 24 which determines the vertical position of the beam 20.

The lower rolls 1, 2 of the apparatus are supported at their central points by two outer support rolls 58 and an intermediate support roll 60.
This intermediate support roll 60 is common. The outer support roll 58 is attached to a horizontal shaft 62 which is laterally aligned via a set screw 64 and a bracket 66 of the beam 18. The intermediate support roll 60 is mounted in the groove 70 in a roll shaft 68 which is vertically adjusted by a set screw (not shown). In this embodiment, the lateral adjustment of the lower roll is mainly used. In addition, although the position of the beam 20 is set by the set screw 24 in this embodiment, another suitable means may be adopted. In place of the set screw 24, for example, a lever with a configuration that allows fine adjustment of the position of the beam 20
An arm mechanism may be provided. Further, the beam may be movable in the lateral direction in addition to the vertical direction. The set screw can also be operated during the sheet bending operation to partially change the curved shape.

As already mentioned, the embodiments of FIGS. 10 and 11 only show one example of the bending device of the present invention. The various members of the apparatus can be appropriately selected in size, and the bearing block of the roll and its position adjusting means can be constructed differently from the illustrated one. For example, it is possible to increase the size of the bearing block so that the means for adjusting the position of the block cooperate in a suitable manner with the stand, in particular with its side walls.

The support rolls 58, 60 must have a width corresponding to the entire top 5 in order to abut the top flat portion 72 corresponding to the undeformed top surface 11 of the sheet. On the other hand, since the support roll 50 contacts a flat surface, the width in the width direction may be smaller than that of the support rolls 58 and 60. Alternatively, the support roll may have a diameter large enough to contact the bottom 7.

[Brief description of drawings]

The attached drawings show an embodiment of the present invention. Fig. 1 is a schematic front view of a roll set, Fig. 2 is an end view of a corrugated sheet before bending, and Fig. 3 is a side view of the roll set when the sheet is bent. ,
4 is a front view of a roll pair, FIG. 5 is an end view of a bent sheet, FIG. 6 is an enlarged partial side view of the bent sheet, and FIGS. 7 to 9 are views exemplifying various sheet shapes. , Tenth
Figure is a partial end view of the bending device, and Figure 11 is XI-XI in Figure 10.
It is sectional drawing of a line. (1), (2) …… first roll, (3) …… opposite roll, (4) ……
Seat, (5) ... top, (5 ″), (7 ′) ... engaging top,
(6) ... side, (6 ') ... engaging side, (7) ... bottom,
(5 '), (7 ") ... engagement bottom, (8) ... groove, (9) ... protrusion, (10) ... rib.

Claims (5)

[Claims] 1. A trapezoidal projecting portion (5), (7) having a lateral cross-sectional shape having undulations which are alternately continuous in a state where the projecting directions are different from each other due to a side portion (6) located therebetween. Sheet
(4) is orthogonal to the longitudinal direction of the undulations, and is curved around the axial center along the lateral width direction, and the protrusion
Of the (5) and (7), the top (5) protruding inward of the curve is formed with a convex rib (10) protruding in a direction toward the bottom (7) protruding outward of the curve. Corrugated sheet. 2. A plurality of first rolls (1), (2) and one of the first rolls (1), (2) facing each other, said first roll (1),
(2) The first roll (1), (1), and (1), which are composed of an opposed roll (3) having an outer peripheral portion having an inverted transverse cross-sectional shape to fit the outer peripheral portion. 2) and the facing roll (3), respectively, engaging tops corresponding to the top (5), the bottom (7) and the side (6) of the seat (4).
(5 "), engagement bottom (5 '), engagement bottom (7"), engagement top
(7 ') and engaging side portions (6 "), (6') are formed, and
The engaging top of one of the first rolls (1), (2)
Grooves (8) and ridges (9) corresponding to the ribs (10) of the sheet (4) are formed separately on (5 ') and the engaging tops (7 ") of the opposing rolls (3). Along with these grooves (8)
2. The ridges (9) and the ridges (9) extend in the circumferential direction so as to be engageable with each other. An apparatus for manufacturing the curved corrugated sheet described. 3. A first roll of the first rolls (1), (2) on the uppermost side of the processing path where the sheet (4) first comes into contact.
2. The (1) is configured so that the facing distance between the (1) and the facing roll (3) can be adjusted. The manufacturing apparatus described. 4. A first roll of the first rolls (1), (2) on the uppermost side of the processing path where the sheet (4) first comes into contact.
2. The (1) is arranged below the facing roll (3) with a constant interval. Or 3. The manufacturing apparatus described. 5. The first roll (2) and the opposing roll (3) are pressed in a relative approaching direction to each other, whereby the first roll (2) is pressed.
The rib (10) is formed on the top (5) of the sheet (4) by the cooperation of the groove (8) of (2) and the ridge (9) of the facing roll (3). A method of manufacturing the described curved corrugated sheet.