JP4990802B2 - Spiral tube manufacturing equipment - Google Patents

Description

  The present invention relates to an apparatus for manufacturing a spiral tube used for air conditioning and concrete formwork, and more particularly to improvement of a spiral forming portion.

  Conventionally, a manufacturing apparatus for producing a spiral tube by feeding an end portion of a band material while carrying out a gobing process, winding the band material in a spiral shape along the inner peripheral surface of the spiral molding portion, and adhering adjacent goby portions to each other. Is known.

  In conventional spiral tube manufacturing equipment, when the strip is wound along the inner peripheral surface of the spiral molded portion, a linear scratch is generated by sliding the strip against the inner peripheral surface of the spiral molded portion. There is a problem that is bad. Even if the inner peripheral surface of the spiral molded portion is smoothed, this scratch can cause a linear scratch unless the foreign matter is removed once the foreign material such as the plating powder of the band material adheres to the inner peripheral surface. I can't avoid it.

  Thus, for example, Patent Document 1 describes an invention for repairing a scratch generated during gobing or spiral molding of a strip by spraying a coating liquid after molding.

Patent Document 2 describes an invention in which a wound generated by contact with a receiving roller when forming a long spiral tube is not conspicuous by performing an exterior treatment together with spiral forming.
JP 2003-080310 A JP 09-057336 A

  However, the inventions of Patent Documents 1 and 2 do not prevent the occurrence of scratches themselves, but make the generated scratches inconspicuous, so that extra exterior processing is required and the entire apparatus is complicated. There is a problem that it will be.

  The present invention has been made in view of the above points, and an object of the present invention is to produce a spiral tube having a simple structure and having a good appearance by preventing generation of scratches when the spiral tube is formed. Is to make it.

  In order to achieve the above object, in the present invention, a plurality of rollers are arranged on the inner peripheral surface of the spiral molded portion.

Specifically, in the first invention,
Only the outer peripheral surface of the inner peripheral surface strip of the spiral shaped portion is brought into contact with target manufacturing apparatus of the spiral tube to produce a spiral tube while winding the strip in a spiral shape along the spiral forming unit,
A plurality of rollers are arranged on the inner peripheral surface of the spiral forming portion so as to be arranged in a spiral shape in accordance with the traveling direction of the band plate .

According to said structure, since the frictional resistance between a strip | belt outer peripheral surface and a spiral shaping | molding part inner peripheral surface reduces with a roller, it becomes difficult to generate | occur | produce foreign materials, such as plating powder, and the driving force required for strip | belt supply is also reduced. Even if foreign matter such as plating powder is generated and adheres to the outer surface of the roller, the foreign material does not stay on the outer surface of the roller due to falling between the rollers as it travels on the outer surface of the roller. It will not continue to scratch the material.

In the second invention, in the first invention,
A configuration in which the end of the strip is fed while being processed, and the spiral strip is wound around the inner peripheral surface of the spiral molded portion, and adjacent spiral sections are secured to each other to produce a spiral tube. To do.

  According to the above configuration, the gobing process is performed when passing through the spiral forming portion, so that the spiral tube can be easily manufactured and the rigidity of the spiral tube is secured by fixing the gob portion.

In the third invention, in the first or second invention,
The plurality of rollers are arranged side by side so that the central axes thereof are parallel to the central axis of the spiral molding part.

  According to the above configuration, since the central axis of the spiral molding portion and the central axis of the roller are parallel, it is easy to arrange a plurality of rollers side by side on the inner surface of the spiral molding portion, and the belt material smoothly moves on the inner surface. As a result, there is no scratch on the strip.

In the fourth invention, in the third invention,
The roller is disposed in a range of at least 1/4 turn from the inlet portion of the inner peripheral surface of the spiral molding portion.

  According to the above configuration, the plating powder is likely to be generated at the time of spiral molding near the entrance of the inner peripheral surface where the flat strip starts to be rounded. Effectively prevented.

In a fifth invention, in any one of the first to fourth inventions,
The strip is made of a galvanized steel sheet.

  According to said structure, since it is hard to generate | occur | produce plating powder by the effect | action of a roller even if it is a galvanized steel plate, it is prevented effectively that a spiral pipe is damaged.

As described above, according to the spiral tube manufacturing apparatus of the present invention, a plurality of rollers that contact only the outer peripheral surface of the band material are disposed on the inner peripheral surface of the spiral molded portion, so that foreign matter can be attached with a simple configuration. Thus, it is possible to manufacture a spiral tube having a good appearance by preventing the occurrence of scratches when the spiral tube is formed.

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

-Configuration of spiral pipe manufacturing equipment-
FIG. 1 shows a spiral tube manufacturing apparatus 1 according to an embodiment of the present invention. This manufacturing apparatus 1 manufactures a spiral tube 20 shown in FIG. 7 and includes an uncoiler 4 for supplying a strip 3 from a coil 2. ing. The uncoiler 4 rotatably supports the coil 2 of the strip 3 made of a galvanized steel plate. A roller train 5 is provided in the next step of the uncoiler 4, and this roller train 5 sends out the strip 3 from the coil 2 supported by the uncoiler 4 in the direction of the white arrow. Although not shown in detail, the roller train 5 includes a drive motor 5a, a delivery roller 5b, and a processing unit that applies a gobing process on both sides of the band material 3, and pulls out the band material 3 with the output roller 5b while processing the processing unit. Thus, it is configured so that gore processing (bending processing) is performed on both ends of the strip 3 in the width direction. In the goby process, for example, the gob portion 3a is formed so that the left side of the band 3 is bent downward vertically and the right side is bent upward as viewed from the uncoiler 4 side (see FIG. 6). The band material 3 subjected to the cross-section processing is wound in a spiral shape by being pushed along the inner peripheral surface 6 a of the spiral molding portion 6.

  A caulking portion 7 is provided on the right side of the inlet portion 6e of the spiral molding portion 6, and the band member 3 passes through the inner peripheral surface 6a of the spiral molding portion 6 while the adjacent goby portions 3a overlap with each other. It is designed to be crimped under pressure.

  The spiral tube 20 wound in a spiral shape by the spiral forming unit 6 is sent out on the receiving base 8 in the direction of the black arrow, and when formed into a predetermined length, it is cut by a cutter (not shown). It has become.

  Next, the configuration of the spiral molding unit 6 will be described in detail.

  As shown in FIGS. 2 to 4, the spiral forming portion 6 is manufactured by, for example, cutting a thick steel pipe into a spiral shape. The inner diameter of the inner peripheral surface 6 a is set according to the outer diameter of the spiral tube 20. A concave groove 10 is formed from the inlet portion 6e to a semicircular shape, leaving a side wall 6f at both ends.

  As shown in FIGS. 4 and 6, a gap 6g is formed between the right side wall 6f of the inlet portion 6e of the spiral molded portion 6 and the left side wall 6f that has made one round, and the inlet portion of the gap 6g. A crimping portion 7 is provided in the widened area of the 6e portion. The caulking portion 7 has upper and lower caulking rollers 7a and 7b, the upper caulking roller 7a has a flat outer peripheral surface, and the lower caulking roller 7b has a concave outer peripheral surface. The band material 3 is sandwiched between the caulking rollers 7 a and 7 b while passing through the inner peripheral surface 6 a of the spiral molding portion 6, and the adjacent seam portion 3 a is pressed and caulked. The crimped goby fitting portion 21 is then configured to pass through the gap 6g.

  As shown in FIG. 5, a plurality of rollers 11 are arranged in parallel with each other inside the concave groove 10. Each roller 11 has a central axis 11a and an outer cylinder 11b that rotates around the central axis 11a. The rollers 11 are arranged side by side so that the central axis 11 a thereof is parallel to the central axis 6 h of the spiral molding portion 6. The outer diameter of the outer cylinder 11b is not particularly limited, but about 15 mm is desirable for dense arrangement. As shown in FIG. 6, the surface of the roller 11 is at a position higher than the side wall 6f of the inlet portion 6e, and a gap C is generated between the strip 3 and the side wall 6f. By doing in this way, the strip | belt material 3 does not contact with the side wall 6f. The gaps between the rollers 11 are arranged so as not to interfere with each other. In the present embodiment, 15 rollers are arranged over about a half circumference, but it is sufficient that they are arranged in a range of at least a quarter circumference (90 ° when viewed from the axial direction). In addition, even if it provides in the range wider than a half circumference, the effect of scratch prevention does not change.

  As shown in FIGS. 5 and 6, the caulking portion 7 is arranged on the right side of the inlet portion 6 e, so that the length L1 of the first two rollers 11 is longer than the length L2 of the other rollers 11. It is short (L1 <L2). The width W of the strip 3 is longer than the lengths L1 and L2 of the rollers 11 (L1 <L2 <W), and the left goby portion 3a is located outside the side wall 6f of the spiral molding portion 6 and is 1 The place where the left side goby part 3a of the surrounding band overlaps with the right side gouge part 3a newly entering the entrance part 6e is sandwiched between the upper and lower caulking rollers 7a and 7b so as to be caulked with each other.

  The inner circumferential surface 6a after the half circumference is formed of a smooth surface on which the roller 11 is not provided. The surface of the smooth surface and the surface of the roller 11 are almost coincident. The smooth surface is preferably plated with a smooth and low friction coefficient.

-Operation of spiral pipe manufacturing equipment-
Next, the operation of the spiral tube manufacturing apparatus 1 according to the present embodiment will be described.

  First, as shown in FIG. 1, a coil 2 made of a galvanized steel plate is attached to the uncoiler 4, and the end of the strip 3 is extended to the roller train 5.

  Next, the drive motor 5a of the roller train 5 is driven, the feed roller 5b is rotated, and the band material 3 is pulled out, and the gore processing is performed in the processing portion.

  Next, as shown in FIG. 6, the band material 3 subjected to the cross-section processing is supplied to the spiral molding unit 6. This strip 3 is wound in a spiral shape while going in the direction of the white arrow shown in FIGS. 2, 4 and 5 while being in contact with the roller 11 for a half circumference from the inlet portion 6e and thereafter in contact with the smooth surface. The adjacent goby portions 3a are fixed by the caulking portion 7 to form the gouge fitting portion 21. At this time, the roller 11 reduces the frictional resistance between the strip 3 and the inner peripheral surface 6a of the spiral molding portion 6, makes it difficult for foreign matter such as plating powder to be generated, and reduces the driving force required for feeding the strip 3. Even if a foreign substance such as plating powder is generated and adheres to the outer surface of the roller 11, the foreign substance continues to adhere to the roller 11 by dropping between the rollers 11 when the strip 3 moves on the outer surface of the roller 11. Therefore, the band material 3 is not damaged by the foreign matter.

  Next, the spiral tube 20 that has been subjected to spiral processing advances on the cradle 8 in the direction of the black arrow, and when it reaches a predetermined length, it is cut with a cutter to complete the spiral tube 20 shown in FIG.

-Effect of the embodiment-
Therefore, according to the spiral tube manufacturing apparatus 1 according to the present embodiment, by arranging the plurality of rollers 11 on the inner peripheral surface 6a of the spiral molded portion 6, the inner surface 6a of the spiral molded portion 6 can be formed with a simple configuration. It is possible to manufacture the spiral tube 20 having a good appearance by preventing the foreign matter from adhering and preventing the generation of scratches when the spiral tube 20 is formed.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the said embodiment, although the strip | belt material 3 was made into the galvanized steel plate, plated steel plates other than galvanization may be sufficient and stainless steel, aluminum, etc. may be sufficient.

  In the above embodiment, the spiral tube manufacturing apparatus 1 includes the uncoiler 4, the roller train 5, and the cradle 8. However, the present invention is not limited to this, and at least the spiral tube manufacturing unit 6 of the present embodiment is provided. Good.

  In the above-described embodiment, the end portions of the strip 3 are subjected to gouge processing, but the spiral molded portion of the present invention can also be used in a spiral welded steel pipe production line in which the ends of adjacent strips are welded together. it can. In this case, a welding device may be arranged at the position of the crimping portion, or may be welded after passing through the spiral forming portion.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

It is a top view which shows the outline of the manufacturing apparatus of a spiral tube. It is the perspective view which looked at the spiral formation part from the entrance side. It is a front view which shows a spiral shaping | molding part. It is the IV-IV sectional view taken on the line of FIG. It is the arrow view which looked at the roller of an entrance part periphery from the V direction. It is the schematic which expands and shows the entrance part of the spiral shaping | molding part in which the strip | belt material was mounted. It is a side view which shows a spiral tube.

DESCRIPTION OF SYMBOLS 1 Spiral pipe manufacturing apparatus 3 Band material 3a Seam part 6 Spiral molding part 6a Inner peripheral surface 6e Inlet part 6f Side wall 6h Central axis 7 Caulking part 11 Roller 11a Central axis 20 Spiral pipe

Claims (5)

A manufacturing apparatus of a spiral tube to produce a spiral tube while winding the strip in a spiral shape along the spiral shaped portion is brought into contact with only the outer peripheral surface of the strip material on the inner peripheral surface of the spiral shaped portion,
A spiral tube manufacturing apparatus , wherein a plurality of rollers are arranged on the inner peripheral surface of the spiral forming portion so as to be arranged in a spiral shape in accordance with the traveling direction of the band plate . In the manufacturing apparatus of the spiral pipe according to claim 1,
The end of the strip is sent out while being processed, and the spiral strip is wound around the inner peripheral surface of the spiral molded portion, and the adjacent cross sections are fixed to each other to produce a spiral tube. A spiral tube manufacturing device. In the manufacturing apparatus of the spiral tube of Claim 1 or 2,
The apparatus for manufacturing a spiral tube, wherein the plurality of rollers are arranged side by side so that a central axis thereof is parallel to a central axis of the spiral forming portion. In the manufacturing apparatus of the spiral pipe according to claim 3,
The said roller is arrange | positioned in the range of at least 1/4 turn from the entrance part of the internal peripheral surface of the said spiral shaping | molding part, The manufacturing apparatus of the spiral pipe | tube characterized by the above-mentioned. In the manufacturing apparatus of the spiral pipe according to any one of claims 1 to 4,
The said strip | belt material consists of galvanized steel plates, The manufacturing apparatus of the spiral pipe | tube characterized by the above-mentioned.

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