JPH04344825A - Coiled pipe manufacturing device - Google Patents

Abstract

PURPOSE:To manufacture the coiled pipe in which a caulking part does not loosen even in the case of a long-sized object by providing a press-contacting roller in the vicinity of a caulking roller for caulking a turned-in piece and a folded piece which come into roll-contact with the outside face of a mandrel and are fitted to each other. CONSTITUTION:At first, by a forming mechanism 13, a turned-in piece 11 and a folded piece 12 are formed in one side edge of a metallic strip member 10 and the other side edge, respectively. In that case, the metallic strip member 10 is wound round obliquely to a mandrel 14, while pressing it by a swelling pressing plate 24 so as to fit the turned-in piece 11 and the next folded piece 12, and also, so as not to swell upward, and the superposed part is caulked by a caulking roller 15. The superposed part on which ruggedness is formed by caulking is furthermore subjected to press-contacting by a press-contacting roller 16, and leveled flatly temporarily. The reggedness flattened temporarily is furthermore caulked by a pressure roller 17. A coiled pipe formed in such a way is caulked surely as to its fitting part, therefore, even if it is formed long, the caulking part does not loosen, and accordingly, a water leakage is not generated.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube manufacturing apparatus used for sheathing prestressed concrete.

0002

[Prior Art] Generally, as a sheath for passing tensile material used in the production of prestressed concrete structures,
Alternatively, a metal spirally wound tube is used as a tube for passing the cable through. Conventionally, most of these spirally wound pipes have a fixed length of about 4 to 5 m, and during construction, they are connected by sleeve-shaped joint sheaths as necessary, and the connected portions are wrapped with tape.

0003

[Problems to be Solved by the Invention] However, in the above-mentioned conventional winding tubes of fixed length, in order to obtain a long sheath, the winding tubes of fixed length are connected by a joint sheath in the form of a sleeve, and the connected portion is wrapped with tape. Was. For this reason, the connection work is complicated and time-consuming, and the two ends of the joint sheath
The work of wrapping tape around the parts also required a large amount of man-hours. Further, even if an attempt was made to manufacture a long spiral wound tube by forcibly extending a conventional winding tube sheath, there was a drawback that the crimped portion could not withstand the long length, making it difficult to manufacture.

SUMMARY OF THE INVENTION An object of the present invention is to provide a winding tube manufacturing apparatus which has been developed in view of the above-mentioned drawbacks of the conventional winding tube, and which does not cause the caulked portion to loosen even when manufacturing a long tube.

[0005]

[Means for Solving the Problems] A winding tube manufacturing apparatus according to the present invention includes a molding mechanism for forming a folded piece on one side edge of a metal strip material and a folded piece on the other side edge, and the molding mechanism A core metal is provided for winding the shaped strip material in a spiral shape by fitting the folding piece and the folding piece together, and the core metal is in contact with the outer surface of the core metal, and the folding piece and the folding piece that are fitted into each other are processed. The winding tube manufacturing apparatus is equipped with a crimping roller for tightening, and is characterized in that a pressure roller is disposed near the crimping roller. Further, a forming mechanism is provided for forming a folded piece on one side edge of a metal strip material and a folded piece on the other side edge, and the folded piece and the folded piece are fitted into the shaped band material by the forming mechanism. A winding tube manufacturing apparatus comprising: a core metal that is wound spirally by a metal core; and a plurality of swage rollers that contact the outer surface of the core metal and swage the folded pieces and the folded pieces that are fitted into each other. This winding tube manufacturing apparatus is characterized in that a pressing roller having a concave groove on the pressing surface is disposed between the crimping rollers. Further, a forming mechanism is provided for forming a folded piece on one side edge of a metal strip material and a folded piece on the other side edge, and the folded piece and the folded piece are fitted into the shaped band material by the forming mechanism. Manufactured in a winding tube manufacturing apparatus comprising a core metal which is wound spirally by the core metal, and a crimping roller that contacts the outer surface of the core metal and crimps the folded pieces and folded pieces that are fitted together. It has a guide rail with a roughly V-shaped cross section that supports the winding tube,
The winding tube manufacturing apparatus is characterized in that a fall prevention fitting is provided at one end of the guide rail.

[0006]

[Operation] As described above, according to the winding tube manufacturing apparatus according to the present invention, even if the winding tube is a long one, the caulked portion is securely caulked, so that the caulked portion will not loosen. . Furthermore, the trouble of connecting winding tubes of fixed-length objects can be saved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view showing the main parts of a winding tube manufacturing apparatus which is an embodiment of the present invention, FIG. 2 is a front view showing the main parts of a winding tube manufacturing apparatus which is an embodiment of the invention, and FIG. FIG. 4 is a front view showing a pressure roller used in the tube manufacturing device, and FIG. 5 is a pressure roller used in the tube manufacturing device of the present invention. It is a side view showing a roller. The winding tube manufacturing apparatus includes a shaping mechanism 13 that forms a folded piece 11 on one side edge of a metal strip 10 and a folded piece 12 on the other side edge, and the metal strip 10 shaped by the shaping mechanism 13. The folding piece 11 and the folding piece 12 are fitted together and wound spirally.
1 and the folded piece 12, and a pressure roller 16 is provided near the tightening roller 15.
is installed. A caulking roller 17 is arranged next to the pressure roller 16.

In FIG. 1, a molding mechanism 13 continuously forms uneven grooves a in the central part of the metal strip material 10 using a plurality of rollers (not shown), and also forms a folded piece 11 on one edge and a folded piece 11 on the other edge. A folded piece 12 is formed at the edge. In addition,
The number of uneven grooves a in the central portion can be appropriately selected from a single number to a plural number depending on the purpose. The core metal 14 has a cylindrical shape with a flange 19, and is rotationally driven via a shaft 14a by a drive source such as a motor (not shown), and is also rotated by a bearing 18.
Supported by Furthermore, a caulking roller 15 and a pressing roller 16 are arranged around the core metal 14, respectively. The crimping roller 15 has a plurality of crimping grooves on its outer periphery, and has a chain 22 wound around the sprockets 20 and 21.
It is driven by a drive mechanism not shown. Further, the sprocket 21 is movably supported by a slide plate 23, as shown in FIG. Core metal 1 of caulking roller 15
The angle of contact and the pressure of contact with 4 can be freely adjusted using the left and right screws 35 and the front and rear screws 36.

The pressure roller 16 includes a roller 30 having a concave groove 30a on the pressure surface as shown in FIGS.
0, a roller support 32 that supports the roller support 31 vertically and rotatably, bolts 33, 34, etc., and is arranged directly below the core metal 14. . Further, the roller 30 has bolts 33,
By adjusting 34, the direction and height can be freely adjusted. The crimping roller 17, which is disposed facing the crimping roller 15 with respect to the core metal 14, has a plurality of crimping grooves on its outer periphery, and is driven by a chain 22a (not shown) that is wound around sprockets 20a and 21a. Driven by a mechanism. Further, the sprocket 21a is movably supported by a slide plate 23a. Further, similar to the crimping roller 15, the contact angle and contact pressure of the crimping roller 17 to the core metal 14 can be freely adjusted using the left and right screws 35a and the front and rear screws 36a.

Next, a method of using the winding tube manufacturing apparatus constructed as described above will be explained. First, the typing mechanism 13
Thus, a folded piece 11 is formed on one side edge of the metal strip material 10, and a folded piece 12 is formed on the other side edge. A metal strip 10 having a folded piece 11 formed on one side edge and a folded piece 12 formed on the other side edge is held diagonally around the core bar 14 while being held down by a swelling holding plate 24 so as not to bulge upward. Go. As shown in FIG. 6, the wrapped metal strip 10 is fitted with the folded piece 11 and the next folded piece 12. The fitted overlapping parts are tilted by guide rollers as shown in FIG. The inclined overlap portion is shown in FIGS.
3, it is crimped by a crimping roller 15. At this time,
The crimping roller 15 is inclined in accordance with the winding angle of the metal strip 10. In addition, the crimping roller 15 is
Although not shown, the left and right screws 35 allow the core bar 14 to be moved and adjusted in the longitudinal direction on a dovetail-shaped table top. Further, it can be moved back and forth depending on the diameter of the winding tube formed by the front and back screws 36. The overlapping portion crimped by the crimping roller 15 has fine irregularities 25 formed on its surface as shown in FIG. The overlapping portion of the metal strip material 10 on which the unevenness 25 is formed is further pressed by a pressing roller 16 disposed directly below the core bar 14 . Since grooves 30a are formed on the pressing surface of the pressing roller 16, the unevenness 25 formed at the overlapping portion is once leveled. Once flattened, the unevenness 25 is further tightened by a tightening roller 17. The crimped overlapping portion becomes slightly rounded as shown in FIG. 9, and fine irregularities 26 are again formed. FIG. 3 is a principle diagram showing the crimping state of the winding tube manufacturing apparatus of the present invention.

[0011] In the winding tube formed in this manner, the fitting portion is securely crimped, so that water leakage does not occur even if the tube is formed longer than before. In this example, although the length was manufactured to 130 m, the caulked portion did not loosen.

Next, a winding tube manufacturing apparatus having a guide rail, which is another embodiment of the present invention, will be described. Here, the winding tube manufacturing apparatus includes a molding mechanism 1 that forms a folded piece 11 on one side edge of a metal strip material 10 and a folded piece 12 on the other side edge.
It has 3. Further, a core metal 14 is provided for winding the strip shaped material molded by the molding mechanism 13 in a spiral shape by fitting the folding piece 11 and the folding piece 12 together. A crimping roller 15 that crimps the matched folding piece 11 and folding piece 12, and a guide rail 27 with a substantially V-shaped cross section that supports the manufactured winding tube.
A fall prevention fitting 29 is provided at one end of the guide rail 27. As shown in FIG. 10, the guide rail 27 extends forward from a portion of the core bar 14 where the strip material is formed into the winding tube, and is held by legs 37 while being inclined downward. The inclination angle of the guide rail 27 can be arbitrarily set by adjusting the screw 37a provided on the leg 37.

The fall prevention fitting 29 is bent into a dogleg shape, and is attached to the guide rail 2 by a bolt 41 attached to a part of the leg 37.
It is fixed so as to cover the top of 7. Guide rail 27
has a substantially V-shaped cross section, and as shown in FIG. 12, a portion of the V-shaped inner surface is cut out at regular intervals to form grooves 27a. This cutout groove 27a reduces the contact area between the winding tube and the guide rail 27, thereby reducing rotational friction. As shown in FIGS. 13 and 14, a sensor 38 is fixed to the rear end of the guide rail 27 by a magnet 39. The sensor 38 may be either optical or mechanical, and detects the tip of the formed winding tube. A detection signal from the sensor 38 is transmitted to the main body of the apparatus via the cord 40, and the production of the winding tube is stopped.

Next, a method of using the winding tube manufacturing apparatus constructed as described above will be explained. The winding tube formed by the winding tube manufacturing apparatus main body extends along the guide rail 27. At this time, since the winding tube is manufactured while being rotated, it extends while contacting the inside of the V-shaped groove of the guide rail 27. When the tube extends to a predetermined length, sensor 3
8 detects this and generates a stop signal. In response to the stop signal, the main body of the device stops its operation and cuts the winding tube with a cutter (not shown). Note that the sensor 38 can be easily removed by operating the lever 39a and can be fixed on a desired guide rail. Therefore, it can be set freely according to the length of the winding tube to be manufactured. Furthermore, when removing the winding tube from the guide rail 27, if the tube is long, for example, 100 m or more, the central part of the tube is wavy,
Sometimes it would fall on the opposite side when I tried to take it out. However, in the guide rail of the winding tube manufacturing apparatus of the present invention, fall prevention fittings 29 are provided at appropriate locations, so even if the guide rail is wavy in the center, it will not fall to the opposite side.

In the above embodiment, the V of the guide rail 27
Although a case has been described in which the inner surface of the V-shape is cut out at regular intervals, rollers may be provided on the inner surface of the V-shape and rotated by an external drive mechanism to automatically feed the winding tube. With this configuration, the rotational friction of the long winding tube can be significantly reduced. Note that the present invention is not limited to the above embodiments, and various design changes can be made based on the technical idea of the present invention.

[0016]

Effects of the Invention As described in detail above, the winding tube manufacturing apparatus according to the present invention has a forming mechanism that forms a folded piece on one side edge of a metal strip material and a folded piece on the other side edge. Prepare,
A core metal is provided for winding the strip shaped material molded by the molding mechanism in a spiral shape by fitting the folding piece and the folding piece together, the core metal is in contact with the outer surface of the core metal, and the folding piece and the folding piece fitted together are folded together. A swaging roller is provided to swage the pieces together, and a pressure roller is disposed near the swaging roller, so that the metal strip material is swaged once by the swaging roller, and then further pressed by the swaging roller, so that it can be folded. It is possible to securely tighten the piece and the folded piece. Therefore, it is possible to manufacture a long winding tube, and the winding tube can be made such that the caulked portion does not loosen. Further, since the guide rail has a substantially V-shaped cross section, surface friction due to rotation can be reduced even when the winding tube is a long one. Furthermore, if a stopper is attached to a predetermined position on the guide rail, the winding tube manufacturing apparatus will automatically stop when the manufactured winding tube reaches a preset length. In addition, since a part of the inner surface of the guide rail is cut out in the shape of a concave groove, the rotational resistance during manufacturing of the winding tube can be reduced. Furthermore, if a roller is provided inside the guide rail and this roller is driven, the rotational resistance can be further reduced. Furthermore, since fall prevention fittings are provided at appropriate positions on the guide rail, even if an attempt is made to take out the winding tube, it will not fall to the opposite side.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the main parts of a winding tube manufacturing apparatus that is an embodiment of the present invention.

FIG. 2 is a front view showing a main part of a winding tube manufacturing apparatus showing an embodiment of the present invention.

FIG. 3 is a principle diagram showing a crimped state of a winding tube manufacturing apparatus according to an embodiment of the present invention.

FIG. 4 is an enlarged front view showing a pressure roller used in the winding tube manufacturing apparatus of the present invention.

FIG. 5 is an enlarged side view showing a pressure roller used in the winding tube manufacturing apparatus of the present invention.

FIG. 6 is a sectional view of a main part showing a state in which a metal strip material is fitted with the next strip material in the winding tube manufacturing apparatus of the present invention.

FIG. 7 is a cross-sectional view of a main part showing a state in which the metal strips fitted in the winding tube manufacturing apparatus of the present invention are folded down.

FIG. 8 is a sectional view of a main part showing a state in which the metal strips fitted in the winding tube manufacturing apparatus of the present invention are crimped by a crimping roller.

FIG. 9 is a cross-sectional view of a main part showing a state in which the metal strip material crimped by the winding tube manufacturing apparatus of the present invention is pressed by a pressure roller;

FIG. 10 is a side view showing a guide rail used in the winding tube manufacturing apparatus of the present invention.

FIG. 11 is an enlarged cross-sectional view showing a guide rail used in the winding tube manufacturing apparatus of the present invention.

FIG. 12 is an enlarged sectional view of a main part showing the relationship between the guide rail and the winding tube used in the winding tube manufacturing apparatus of the present invention.

FIG. 13 is a front view showing how a stopper is attached to the guide rail of the winding tube manufacturing apparatus of the present invention.

FIG. 14 is a perspective view showing how a stopper is attached to the guide rail of the winding tube manufacturing apparatus of the present invention.

[Explanation of symbols]

10 Metallic strip material 11
Folding piece 12 Folding piece 13 Embossing mechanism 14 Core bar 14a Shaft 15 Clamping roller 16 Pressure roller 17 Clamping roller 18 Bearing 19 Flange 20 Sprocket 21
Sprocket 22 Chain 23 Slide plate 24 Swelling plate 25
Unevenness 26 Unevenness 27 Guide rail 28
Guide roller 29 Fall prevention fitting 30
Roller 30a Concave groove 31 Roller holder 32 Roller holder 33 Bolt 34 Bolt 35 Left and right screws 36 Front and rear screws 37 Legs 38 Sensor 39 Magnet 40 Code 41 Bolt

Claims (3)

[Claims] 1. A molding mechanism for forming a folded piece on one side edge of a metal strip material and a folded piece on the other side edge, and the strip material shaped by the shaping mechanism is formed into the folded piece and the folded piece. A winding tube manufacturing device comprising a core metal that is fitted together and wound spirally, and a crimping roller that contacts the outer surface of the core metal and crimps the folded piece and folded piece that are fitted together, A winding tube manufacturing apparatus characterized in that a pressure roller is disposed near the caulking roller. 2. A molding mechanism for forming a folding piece on one side edge of a metal strip material and a folding piece on the other side edge, and forming the strip material shaped by the shaping mechanism into the folding piece and the folding piece. A winding tube manufacturing device comprising a core metal that is fitted together and wound spirally, and a plurality of crimping rollers that contact the outer surface of the core metal and swage the folded pieces and the folded pieces that are fitted together. A winding tube manufacturing apparatus characterized in that a pressure roller having a concave groove on a pressure surface is disposed between the plurality of crimping rollers. 3. A molding mechanism for forming a folded piece on one side edge of a metal strip material and a folded piece on the other side edge, and the strip material shaped by the shaping mechanism is formed into the folded piece and the folded piece. A winding tube manufacturing device comprising a core metal that is fitted together and wound spirally, and a crimping roller that contacts the outer surface of the core metal and crimps the folded piece and folded piece that are fitted together, A winding tube manufacturing apparatus comprising a guide rail having a substantially V-shaped cross section for supporting manufactured winding tubes, and a fall prevention fitting provided at one end of the guide rail.