JP2014234897A - Duplex tube, and apparatus and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a duplex tube capable of forming a desired channel by suppressing and reducing tube connection.SOLUTION: In a duplex tube 1, a plurality of pipe parts 11 and 12 for making a fluid flow by a predetermined distance in a predetermined direction are continuously provided, and flow directions are different from each other in the pipe parts 11 and 12 adjoining each other. A band material 2, the longitudinally-elongated side edge of which assumes a predetermined shape, is spirally wound, and the side edges adjoining each other are connected to each other so that the plurality of pipe parts 11 and 12 can be continuously formed.

Description

  The present invention relates to air conditioning ducts, exhaust pipes, drain pipes, and the like, and more particularly, to a composite pipe provided with a plurality of pipe parts, a manufacturing apparatus thereof, and a manufacturing method thereof.

  For example, in air conditioning ducts, straight pipes with straight axes and curved pipes (section bends) with bent axes are manufactured separately and used in combination as necessary at the construction site (for example, , See Patent Document 1). For example, when changing the air flow, a straight pipe and a curved pipe are connected to form a desired flow path.

  Specifically, the open end portion of the curved pipe is inserted into the open end portion of the straight pipe, and the insertion portion (connection portion) is screwed. In addition, the insert was sealed and wrapped with aluminum tape.

JP 2011-005848 A

  However, since the curved pipe and the straight pipe, which are separate members, are connected at the construction site, the connection position and angle between the curved pipe and the straight pipe may be shifted. In addition, since many processes such as insertion, screwing, sealing, and winding of aluminum tape are required for connection, not only much labor and time are required, but also the connection accuracy varies, There is a risk that the quality of the air-conditioning duct (pipe line / flow path) may be deteriorated or varied. Further, since the bent pipe and the straight pipe are separately manufactured, stored, and connected, the manufacturing cost and the construction cost are increased.

  Therefore, an object of the present invention is to provide a composite pipe, a composite pipe manufacturing apparatus, and a manufacturing method capable of forming a desired flow path by suppressing and reducing connection of pipes.

  In order to achieve the above object, according to the first aspect of the present invention, a plurality of tube portions for continuously flowing a fluid in a predetermined direction for a predetermined distance are provided, and the predetermined direction is set in the tube portions adjacent to each other. A plurality of the pipe parts, which are different composite pipes, in which a strip whose side edges extending in the longitudinal direction have a predetermined shape are spirally wound and the side edges and side edges adjacent to each other are connected to each other. Is formed continuously.

  According to a second aspect of the present invention, in the composite pipe according to the first aspect, a reinforcing rib extending in the circumferential direction is formed in at least one of the pipe portions.

  According to a third aspect of the present invention, there is provided a composite in which a plurality of pipe portions for continuously flowing a fluid in a predetermined direction for a predetermined distance are provided, and composite pipes having different predetermined directions are manufactured in the pipe portions adjacent to each other. A pipe manufacturing apparatus, which cuts a long strip-shaped workpiece with a predetermined trajectory in the longitudinal direction, and forms a strip whose side edges extending in the longitudinal direction have a predetermined shape; and First goby forming means for forming the first goby on one side edge, and second goby formation for forming the second goby engaging with the first goby on the other side edge of the band material And a plurality of the first goby and the second goby that are adjacent to each other by spirally winding a band formed with the first goby and the second goby. And a winding forming means for continuously forming the tube portion.

  According to a fourth aspect of the present invention, in the composite pipe manufacturing apparatus according to the third aspect, the apparatus further comprises rib forming means for forming a reinforcing rib extending in the circumferential direction on at least one of the pipe portions.

  The invention according to claim 5 is the composite pipe manufacturing apparatus according to claim 3 or 4, wherein the second goby forming means is movable in the width direction of the strip. To do.

  A sixth aspect of the present invention is the composite pipe manufacturing apparatus according to the third to fifth aspects, wherein the winding forming means includes an annular forming jig and winds the strip along the inner surface of the forming jig. It is characterized by that.

  The invention according to claim 7 is the composite pipe manufacturing apparatus according to claim 6, wherein the winding forming means is detachably provided with a plurality of the forming jigs having different inner diameters.

  The invention according to claim 8 is a composite in which a plurality of tube portions for continuously flowing a fluid in a predetermined direction for a predetermined distance are provided, and a composite tube in which the predetermined directions differ in the tube portions adjacent to each other. A method of manufacturing a tube, comprising: cutting a long strip-shaped workpiece along a longitudinal path with a predetermined trajectory, and forming a strip with a side edge extending in the longitudinal direction having a predetermined shape; A first goby forming step for forming a first goby on one side edge, and a second goby formation for forming a second goby that engages with the first goby on the other side edge of the band member A plurality of the first goby and the second goby that are adjacent to each other by winding the strip formed with the step and the first goby and the second goby in a spiral shape; A winding forming step of continuously forming the tube portion.

  The invention according to claim 9 is the composite pipe manufacturing method according to claim 8, further comprising a rib forming step of forming a reinforcing rib extending in the circumferential direction on at least one of the pipe portions.

  A tenth aspect of the present invention is the composite pipe manufacturing method according to the eighth or ninth aspect, wherein the winding forming step winds the strip along an inner surface of an annular forming jig. .

  According to the first aspect of the present invention, since the strip is wound spirally and adjacent side edges are connected, a plurality of pipe portions are formed continuously. A configuration in which a plurality of pipes are combined can be obtained, and a desired flow path can be formed by suppressing or reducing the connection between the pipes. In addition, since a plurality of pipe parts are formed continuously with a single strip, there is no shift in the connection position and angle between the pipe parts, and there are also insertion, screwing, sealing, winding of aluminum tape, etc. No process is required. For this reason, not only can the labor, time, and cost required for manufacturing and construction (connection) be reduced, but also there is no variation in connection accuracy or air leakage from the connection part, and high-quality pipes and flow paths are formed. be able to.

  According to the invention described in claim 2, since the reinforcing rib extending in the circumferential direction is formed in the pipe portion, it is possible to reduce the weight of the composite pipe and reduce the material cost. . For example, when the diameter of the pipe part increases, the pipe part (strip) must be thickened to obtain the desired and desired strength and rigidity, but the strength and rigidity of the pipe part increase due to the reinforcing ribs. The part can be thinned.

  According to invention of Claim 3 and 8, the strip | belt material in which the goby was formed is wound helically, a some pipe part is formed continuously, and a composite pipe | tube is manufactured. In other words, since a composite pipe having a plurality of continuous pipe parts is manufactured from a long strip-shaped workpiece, labor, time, and cost required for manufacturing can be reduced, and the manufactured composite pipe The effect similar to that of claim 1 can be obtained.

  According to the invention described in claims 4 and 9, since the reinforcing rib is formed on the pipe portion by the rib forming means, the same effect as in the second aspect is obtained, and the reinforcing rib is also formed in the manufacturing apparatus and method. Therefore, it is not necessary to form the reinforcing rib by another apparatus and method, and the labor, time, and cost required for manufacturing can be reduced.

  According to the fifth aspect of the present invention, since the second goby forming means is movable in the width direction of the band material, the width of the workpiece is adjusted according to the size / diameter of the composite pipe / tube portion to be manufactured. Even when the size is changed, a composite pipe having a plurality of sizes and diameters can be manufactured by moving the second goby forming means in accordance with the width of the workpiece, that is, the band material. That is, one main manufacturing apparatus can manufacture composite pipes having a plurality of sizes and diameters, and the equipment cost can be significantly reduced.

  According to the invention described in claims 6 and 10, since the strip is wound spirally along the inner surface of the forming jig, deformation of the strip due to the spring back is suppressed, and the strip can be more accurately and easily. Can be spirally wound.

  According to the invention described in claim 7, since the forming jigs having different inner diameters are detachable, a plurality of sizes can be obtained by attaching the forming jigs having inner diameters corresponding to the sizes and diameters of the composite pipes and pipe parts to be manufactured. Composite pipes / pipe parts with a diameter and diameter can be manufactured.

It is a front view which shows the composite pipe which concerns on embodiment of this invention. FIG. 2 is a partially enlarged view of the composite pipe in FIG. 1. It is sectional drawing which shows the engagement state of the double hull and the single hull in the composite pipe | tube of FIG. 1, and a reinforcement rib. It is a top view which shows the strip | belt material for manufacturing the composite pipe | tube of FIG. It is a part of top view which shows the composite pipe manufacturing apparatus which concerns on embodiment of this invention. FIG. 6 is a plan view continued from FIG. 5. It is a part of front view which shows the composite pipe manufacturing apparatus which concerns on embodiment of this invention. It is a front view of a continuation of FIG. It is a figure which shows the cutting locus of the coil material by the composite pipe manufacturing apparatus of FIGS.

  The present invention will be described below based on the illustrated embodiments.

  FIG. 1 is a front view showing a composite pipe 1 according to an embodiment of the present invention. The composite pipe 1 is provided with a plurality of continuous pipe portions for flowing a fluid in a predetermined direction for a predetermined distance. The pipe portions adjacent to each other have different predetermined directions.

  Specifically, it is an air conditioning duct having a cylindrical cross section, and extends from a straight pipe portion (pipe portion) 11 having a straight axis (center line) and one end portion of the straight pipe portion 11, and the axis is 90 in an arc shape. A bent pipe portion (pipe portion) 12 that is bent several times and a joint portion 13 that extends from one end portion (end portion on the side of the anti-straight pipe portion 11) of the bent pipe portion 12 and has a straight axis are integrally provided. . Here, the straight pipe part 11 and the curved pipe part 12 are pipe parts for flowing air (fluid) by a predetermined distance in a predetermined direction, and the straight pipe part 11 linearly flows air by a distance L1. The bent tube portion 12 is configured to bend (rotate) the air 90 degrees and flow it for a distance L2. Here, the distances L1 and L2 are set to a desired / arbitrary length according to the construction site where the composite pipe 1 is attached.

  As described above, the air flow (predetermined direction) is different between the straight pipe portion 11 and the curved pipe portion 12 adjacent to each other. On the other hand, the joint portion 13 is a connection portion for connecting to an external air conditioning duct. The joint portion 13 is inserted into the external air conditioning duct, or the external air conditioning duct is inserted into the joint portion 13. It has come to be. That is, the joint portion 13 is not a tube portion for flowing air in a predetermined direction for a predetermined distance.

  In addition, reinforcing pipes 14 extending in the circumferential direction are formed on the straight pipe part 11, the curved pipe part 12 and the joint part 13. As shown in FIGS. 2 and 3, the reinforcing rib 14 has a convex / inverted U-shape in which the cross-sectional shape protrudes from the inside of the tube to the outside of the tube, and is formed continuously (spiral) at a predetermined interval. .

  As shown in FIG. 4, such a composite pipe 1 is formed by winding a strip 2 whose side edges extending in the longitudinal direction have a predetermined shape and spirally winding the side edges and side edges adjacent to each other. Thus, the straight pipe portion 11, the curved pipe portion 12, and the joint portion 13 are formed continuously (integrally). That is, in the band member 2, the straight pipe forming part 21, the curved pipe forming part 22, and the joint forming part 23 are continuously formed in this order. The straight pipe forming portion 21 is straight at both longitudinal edges, and its length L11 is set so that the straight pipe forming portion 21 is formed by the straight pipe forming portion 21 based on the cylinder diameter of the composite pipe 1. Yes.

  The curved pipe forming portion 22 has a waveform curve in which one side edge in the longitudinal direction is a straight line and the other side edge is alternately continuous with crests 22a and troughs 22b. The pitch P of the waveform curve (distance between the peak portion 22a and the peak portion 22a, see FIG. 9) P and the position are based on the cylinder diameter of the composite pipe 1, and the peak portion 22a is always located on the outer arc side of the curved pipe portion 12. The trough portion 22b is set so as to be always located on the inner arc side of the curved pipe portion 12. Further, the length L12 of the curved pipe forming portion 22 is set so that the curved pipe forming portion 22 forms the curved pipe portion 12 based on the cylinder diameter of the composite pipe 1.

  The joint forming portion 23 has straight side edges in the longitudinal direction, and its length L13 is set so that the joint forming portion 23 forms the joint portion 13 based on the tube diameter of the composite pipe 1.

  A double hull 2a as shown in FIG. 3 is formed on one side (straight side) of the strip 2 and a single hull 2b is formed on the other side (waveform curve side). Yes. Then, the strip 2 is wound in a spiral shape, and the double hose 2a and the single haze 2b adjacent to each other are engaged and connected, so that the straight pipe forming portion 21 forms the straight pipe portion 11, and the bent portion 2b is bent. The bent tube portion 12 is formed by the tube forming portion 22, and the joint portion 13 is formed by the joint forming portion 23. Here, reference numeral 15 in FIGS. 1 to 3 denotes an engaging portion in which a double shell 2a and a single shell 2b are engaged and connected.

  According to the composite pipe 1 having such a structure, the straight pipe portion 11 and the curved pipe portion 12 are formed by connecting the adjacent double hull 2a and the single hose 2b by winding the strip 2 in a spiral shape. Further, since the joint portion 13 is formed continuously, a configuration in which a plurality of tubes are combined only with the composite tube 1 can be obtained. For example, when it is desired to form a J-shaped channel / duct, conventionally, a straight pipe and a curved pipe, which are separate bodies, must be connected, and a joint portion must be provided on the curved pipe. The composite pipe 1 itself provides a J-shaped flow path, and connection with other pipes is unnecessary. Similarly, when it is desired to form an L-shaped flow path, conventionally, straight pipes must be connected to both ends of a 90-degree curved pipe, whereas in the joint portion 13 of the composite pipe 1, It is only necessary to connect one straight pipe. As described above, it is possible to form a desired flow path by suppressing / reducing the number of connections between the tubes.

  In addition, since the straight pipe portion 11, the curved pipe portion 12, and the joint portion 13 are continuously formed with one band member 2, the connection position between the straight pipe portion 11, the curved pipe portion 12 and the joint portion 13 There is no angle shift, and there is no need for processes such as insertion, screwing, sealing, and winding of aluminum tape. For this reason, not only can the labor, time, and cost required for manufacturing and construction (connection) be reduced, but also there is no variation in connection accuracy and quality, and there is no air leakage from the connection part. A composite tube 1) can be formed.

  Furthermore, since the reinforcing ribs 14 extending in the circumferential direction are formed in the straight pipe portion 11, the bent pipe portion 12, and the joint portion 13, the composite pipe 1 can be thinned to achieve weight reduction and material cost reduction. Is possible. For example, when the diameter of the composite pipe 1 is increased, the composite pipe 1 (strip 2) must be thickened to obtain a predetermined and desired strength and rigidity. Therefore, the composite tube 1 can be thinned.

  Next, FIGS. 5 to 8 are a plan view and a front view showing the composite pipe manufacturing apparatus 100 for manufacturing the composite pipe 1, and an overall plan view by combining the arrow A in FIG. 5 and the arrow A in FIG. The whole front view is configured by combining the arrow B in FIG. 7 and the arrow B in FIG. This composite pipe manufacturing apparatus 100 mainly includes a cut forming stage 101 and a winding forming stage (winding forming means) 102.

  The cut forming stage 101 is installed on the downstream side of the uncoiler 103 on which a long strip-shaped coil material (work material) M is installed, and an outer edge roller unit (second goby forming means) 104 and a cutter unit (cutting means) 105. And an inner edge roller unit (first goby forming means) 106. The uncoiler 103 is a device that unwinds the coil material M wound in a coil shape, and the outer edge roller unit 104 has a double haze (second seam) 2a on both side edges of the coil material M unwound from the uncoiler 103. Is formed.

  Specifically, a plurality of outer edge rollers 141 are disposed along the longitudinal direction of the coil material M, and the side edges of the coil material M are sequentially bent by the outer edge rollers 141 to double the helix as shown in FIG. 2a is formed. Here, the double hull 2a and the single hull 2b shown in FIG. 3 show a state where the double haze 2a and the single haze 2b are engaged and joined, and are formed by the outer edge roller unit 104 and the inner edge roller unit 106. The shape is different. That is, the roller units 104 and 106 are formed in a shape that allows engagement as shown in FIG.

  Further, the outer edge roller unit 104 is movable in the width direction of the coil material M, that is, in the width direction of the cut material (band material) 2 described later. That is, the roller frame on which the outer edge rollers 141 are disposed is disposed so as to be movable and adjustable in the width direction of the coil material M, and is driven by the first moving motor unit 142. Further, such movement / adjustment of the outer edge roller unit 104 is controlled by the first control panel 111, and by inputting parameters such as the width dimension of the coil material M or the diameter of the composite pipe 1 to be manufactured. , Controlled to match the input parameters. Thus, according to the composite pipe 1 to be manufactured, the width and thickness of the coil material M to be used are preset, and the predetermined composite pipe 1 can be manufactured by changing the width dimension of the coil material M and the like. It is like that.

  The cutter unit 105 cuts the coil material M along a predetermined trajectory in the longitudinal direction to form two cut materials (band materials) 2 having a cutting edge having a wavy curve and the other side edge being a straight line. Yes, it is arranged downstream of the outer edge roller unit 104. That is, the cutter that makes point contact with the coil material M is disposed so as to be movable in the width direction of the coil material M, and the coil material M is moved while moving in the width direction with respect to the coil material M sent from the uncoiler 103. By cutting, the cut material 2 having a predetermined shape is formed. Such movement of the cutter is program-controlled by the first control panel 111 and inputted by inputting parameters such as the diameter of the composite pipe 1 to be manufactured, the flow path, or the width dimension of the coil material M. Controlled to fit parameters.

  The predetermined trajectory is set in advance based on the pipe diameter of the composite pipe 1 to be manufactured, the radius of curvature of the curved pipe portion 12, the distances L1 and L2, the width dimension of the coil material M, and the like. The trajectory is such that the tube 1 can be manufactured. Specifically, as shown in FIG. 9, the cutting material 2 including the straight pipe forming part 21, the curved pipe forming part 22, and the joint forming part 23 as described above is formed. Here, a two-dot chain line T in FIG. 9 is a cutting locus by the cutter unit 105.

  The inner edge roller unit 106 forms a single seam (first seam) 2 b at the cutting edge of the cutting material 2, and is disposed on the downstream side of the cutter unit 105. Specifically, a plurality of inner edge rollers 161 are arranged along the longitudinal direction of the coil material M, and the cutting edges (inner edges) of the cut material 2 are sequentially bent by the inner edge rollers 161, as shown in FIG. The single forms a shell 2b. Similarly to the outer edge roller unit 104, the second moving motor unit 162 can be moved in the width direction of the coil material M / cut material 2, and the first control panel 111 has parameters such as the width dimension of the coil material M. By inputting, movement control is performed so as to conform to the input parameters. As described above, in this embodiment, the inner edge roller unit 106 is also movable, but the position of the inner edge roller unit 106 is fixed by forming a single shell 2b immediately after cutting by the cutter unit 105. May be.

  In this way, the outer edge roller unit 104 forms a double hull 2a on the straight edge (the other side edge) of the cut material 2, and the inner edge roller unit 106 forms a hull 2b on the cut edge of the cut material 2. . Here, the double shell 2a is first formed in the state of the coil material M. As a result, the double shell 2a may be formed on the straight edge of the cut material 2, for example, the coil material M is cut. After forming the cut material 2, a double seam 2 a may be formed on the straight edge of the cut material 2.

  Further, the outer edge roller unit 104 and the inner edge roller unit 106 are respectively provided for the two cutting materials 2. That is, the outer edge roller unit 104 is disposed on each side edge of the coil material M, and the inner edge roller unit 106 is disposed on the inner edge (cut edge) of each cutting material 2.

  The cut material 2 in which the double seam 2a and the single seam 2b are formed is sent to the winding forming stage 102 via the guide feeder 107, respectively. Here, the guide feeder 107 has a function of guiding and guiding the cutting material 2 to the winding forming stage 102 and adjusting the double shell 2a and the single shell 2b. That is, in the cut forming stage 101 or after the cut forming stage 101, the shells 2a and 2b may be distorted or bent, and the deformed shells 2a and 2b are passed through a guide jig having a predetermined shape. Therefore, it is arranged in a regular shape.

  Further, as shown in FIG. 6, the guide feeder 107 is rotatable (swinged) in the horizontal direction in accordance with the width of the coil material M / cut material 2, the feed angle, and the like. The space between the guide feeder 107 and the cut forming stage 101 is a stage / space for adjusting the tension applied to the cutting material 2. That is, the cutting speed may be different between the cut forming stage 101 and the winding forming stage 102. In this case, in order to prevent an excessive tension from being applied to the cutting material 2, the cutting material 2 is loosened at this stage. In this state, it is sent to the winding forming stage 102.

  The winding forming stage 102 is a stage for forming the composite pipe 1 by spirally winding the cut material 2 from the cut forming stage 101, and can form the composite pipe 1 having a plurality of pipe diameters and curvature radii. . Specifically, as shown in FIG. 8, a plurality of annular forming jigs 121 having different inner diameters are detachably provided, and the cutting material 2 is fed into the inside of the forming jig 121 by a feeder. Thereby, the cut material 2 flows along the inner surface of the forming jig 121. For example, the peak portion 22a of the curved pipe forming portion 22 is located on the outer arc side, the valley portion 22b is located on the inner arc side, and adjacent to each other. The cut material 2 is spirally wound while the double 2z and the single 2b overlap. Then, the portion where the double base 2a and the single base 2b overlap is pressed with a jig to engage and join.

  By continuously performing such winding and engagement with respect to the straight pipe forming portion 21, the curved pipe forming portion 22, and the joint forming portion 23, the straight pipe portion 11, the curved pipe portion 12, and the joint portion 13 are continuously provided. The composite tube 1 is formed by forming the target and the body integrally. Here, in this embodiment, the straight pipe part 11, the curved pipe part 12, and the joint part 13 are formed in this order, but they may be formed in the reverse order. In addition, a plurality of pressing arms 122 are arranged radially around the forming jig 121, and the formed composite pipe 1 is pressed and held by the pressing arms 122 while being shaped and held. And after the composite pipe 1 is shape | molded, the cutting material 2 is cut | disconnected and the composite pipe 1 is cut off.

  Here, the inner diameter of the forming jig 121 is set to be the same as the tube diameter / outer diameter of the composite pipe 1 to be manufactured. In this embodiment, the pipe diameter (diameter) of the composite pipe 1 and the curved pipe are set. The shape of the cut material 2 is set so that the radius of curvature of the portion 12 has the same dimension. That is, when manufacturing the composite pipe 1 having a specific pipe diameter and curvature radius, the forming jig 121 having a predetermined inner diameter corresponding to the composite pipe 1 is mounted. Further, each pressing arm 122 is detachably disposed on the arm support 123, and can be adapted to the composite tube 1 having different tube diameters and curvature radii by changing the disposition position.

  Furthermore, a rib forming portion having a concave cross section and extending in the circumferential direction is formed on the inner peripheral surface of the forming jig 121. And, as described above, when the cutting material 2 is spirally wound along the inner surface of the forming jig 121, by pressing the cutting material 2 to the rib forming portion side with a pressing member (roller), The cutting material 2 is deformed along the rib forming portion. Thereby, the above-mentioned reinforcement rib 14 extended in the circumferential direction is formed in the straight pipe part 11, the curved pipe part 12, and the joint part 13. As shown in FIG. Thus, the forming jig 121 also serves as a rib forming means for forming the reinforcing rib 14.

  Such a winding forming stage 102 is provided for each of the two cut materials 2. Further, the feed speed of the cutting material 2 to the forming jig 121 by the feeder, the cutting timing of the cutting material 2, and the like are controlled by the second control panel 124. That is, by inputting the type / flow channel shape of the composite pipe 1 to be manufactured to the second control panel 124, the feed rate, the cutting timing, and the like are automatically controlled so as to match the input type.

  Next, the operation of the composite pipe manufacturing apparatus 100 having such a configuration and a composite pipe manufacturing method using the composite pipe manufacturing apparatus 100 will be described.

  First, the coil material M suitable for the flow path shape, pipe diameter, and radius of curvature of the composite pipe 1 to be manufactured is set on the uncoiler 103, and a forming jig 121 having a predetermined inner diameter is mounted on the winding stage 102. Next, the width dimension of the coil material M is input to the first control panel 111, the outer edge roller unit 104 and the inner edge roller unit 106 are moved to predetermined positions, and a cutting locus by the cutter unit 105 is set. . Further, the type of the composite pipe 1 is input to the second control panel 124, and the feed speed and cutting timing in the winding forming stage 102 are adjusted.

  Next, when the composite pipe manufacturing apparatus 100 is operated, the coil M unwound from the uncoiler 103 is sent to the cut forming stage 101, and the double edge 2a is formed on both side edges of the coil material M by the outer edge roller unit 104. (Second goby formation step). Subsequently, the coil material M is cut into a predetermined shape by the cutter unit 105 (cutting step) to form the two cut materials 2 as described above, and the cutting member 2 is cut by the inner edge roller unit 106 that follows. A single shell 2b is formed at the edge (first goby forming step).

  Next, each cut material 2 is sent to the winding forming stage 102 via the guide feeder 107. Then, in the winding forming stage 102, the cut material 2 is spirally wound along the inner surface of the forming jig 121 as described above, and the double shell 2a and the single shell 2b are engaged and joined ( The reinforcing rib 14 as described above is formed together with the winding forming step (rib forming step), and the composite pipe 1 is formed. By performing such a process continuously, the composite pipe | tube 1 is manufactured continuously.

  As described above, according to the composite pipe manufacturing apparatus 100 and the composite pipe manufacturing method, the composite pipe 1 including the straight pipe portion 11, the curved pipe portion 12, and the joint portion 13 is automatically and continuously from the coil material M. Can be manufactured. For this reason, the labor, time, and cost required for production can be reduced. Moreover, since the reinforcing ribs 14 are formed simultaneously with the manufacture of the composite pipe 1, it is not necessary to form the reinforcing ribs 14 with another device, and the labor, time and cost required for manufacturing can be reduced.

  In addition, the outer edge roller unit 104 and the inner edge roller unit 106 are moved and adjusted, the cutting locus by the cutter unit 105 is set to a predetermined locus, and the feeding speed and cutting timing in the winding forming stage 102 are adjusted to obtain a predetermined locus. The composite pipe 1 having a plurality of flow path shapes, pipe diameters, and curvature radii can be formed by mounting the forming jig 121 having the inner diameter. That is, the single manufacturing apparatus 100 can manufacture a composite pipe having an arbitrary flow path and a composite pipe 1 having a plurality of sizes and diameters, and can significantly reduce the equipment cost.

  Further, since the outer edge roller unit 104, the inner edge roller unit 106, and the winding forming stage 102 are provided for the two cut materials 2, respectively, the two composite materials 1 are processed by simultaneously processing the two cut materials 2. Can be manufactured at the same time. As a result, the productivity is improved and, as described above, the composite pipe 1 having a plurality of flow channel shapes, sizes and diameters can be manufactured, so that the operating rate and the production efficiency are remarkably high.

  Moreover, since the cutting material 2 is spirally wound along the inner surface of the forming jig 121, deformation of the cutting material 2 due to the spring back is suppressed, and the cutting material 2 can be spirally wound with higher accuracy. .

  On the other hand, since the composite pipe 1 manufactured in this way has the straight pipe part 11, the curved pipe part 12, and the joint part 13 formed continuously by the integral cutting material 2, as described above, There is no need to manufacture and connect the straight pipe part 11 and the curved pipe part 12 separately. For this reason, productivity and workability are high, and since there is no connection part in the straight pipe part 11 and the curved pipe part 12, an air leak, a fall of intensity | strength, etc. are not caused.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, in the above embodiment, the composite pipe 1 having the curved pipe portion 12 whose axis is bent 90 degrees in an arc shape has been described. However, the present invention is also applicable to a composite pipe having a curved pipe portion bent other than 90 degrees. Can do. Moreover, although the case where two pipe parts are the straight pipe part 11 and the curved pipe part 12 was demonstrated, the composite pipe | tube provided with three or more pipe parts may be sufficient. For example, it may be a composite pipe in which a pipe part similar to the curved pipe part 12 is provided on the free end part side of the straight pipe part 11 (end part on the anti-bent pipe part 12 side). In this way, a composite pipe having an arbitrary flow path can be constituted by a single band member 2 and a cut member 2.

  Furthermore, although the reinforcing rib 14 is formed in each of the straight pipe portion 11, the curved pipe portion 12, and the joint portion 13, the reinforcing rib 14 may be formed only in part. For example, the reinforcing ribs 14 may be formed only on the straight pipe portion 11 by pressing the straight pipe forming portion 21 with a pressing member only when the straight pipe forming portion 21 is spirally wound.

  In the composite pipe manufacturing apparatus 100, the forming jig 121 also serves as a rib forming unit. However, the reinforcing ribs 14 may be formed on the cut material 2 before the cutting material 2 is spirally wound by the forming jig 121. . Furthermore, although the first control panel 111 and the second control panel 124 are separate bodies, they may be provided integrally.

  The present invention is not limited to air conditioning ducts but can be applied to such pipes as exhaust pipes and drain pipes.

1 Composite pipe 11 Straight pipe part (pipe part)
12 Curved pipe part (pipe part)
13 Joint part 14 Reinforcement rib 2 Band material, cutting material 2a Double hull (second goby, side edge)
2b single haze (first goby, side edge)
DESCRIPTION OF SYMBOLS 100 Composite pipe manufacturing apparatus 101 Cut formation stage 102 Winding stage (winding means)
103 Uncoiler 104 Outer edge roller unit (second goby forming means)
105 Cutter unit (cutting means)
106 Inner edge roller unit (first goby forming means)
107 guide feeder 121 forming jig (rib forming means)
M Coil material (work material)

Claims (10)

A plurality of pipe parts for continuously flowing a fluid in a predetermined direction for a predetermined distance are provided, and the predetermined direction is different in the pipe parts adjacent to each other,
A plurality of pipe parts are continuously formed by winding a strip having a predetermined side edge extending in the longitudinal direction in a spiral manner and connecting adjacent side edges and side edges. Yes,
A composite tube characterized by that. Reinforcing ribs extending in the circumferential direction are formed on at least one of the tube portions.
The composite pipe according to claim 1. A composite pipe manufacturing apparatus for manufacturing composite pipes in which a plurality of pipe portions for flowing a fluid in a predetermined direction for a predetermined distance are continuously provided, and the predetermined directions differ in the pipe portions adjacent to each other,
A cutting means for cutting a long strip-shaped workpiece in a longitudinal direction with a predetermined trajectory, and forming a strip with a side edge extending in the longitudinal direction having a predetermined shape;
First goby forming means for forming a first goby on one side edge of the strip;
A second goby forming means for forming a second goby that engages with the first goby on the other side edge of the strip;
A plurality of the tube portions are formed by spirally winding a band material in which the first goby and the second goby are formed and engaging the first goze and the second goby that are adjacent to each other. Winding forming means to form continuously;
A composite pipe manufacturing apparatus comprising: Rib forming means for forming a reinforcing rib extending in the circumferential direction on at least one of the pipe parts,
The composite pipe manufacturing apparatus according to claim 3. The second goby forming means is movable in the width direction of the strip.
The composite pipe manufacturing apparatus according to claim 3, wherein the apparatus is a composite pipe manufacturing apparatus. The winding forming means includes an annular forming jig, and winds the strip along the inner surface of the forming jig.
The composite pipe manufacturing apparatus according to any one of claims 3 to 5, wherein The winding forming means is detachably equipped with a plurality of the forming jigs having different inner diameters.
The composite pipe manufacturing apparatus according to claim 6. A composite pipe manufacturing method in which a plurality of pipe parts for continuously flowing a fluid in a predetermined direction for a predetermined distance are provided, and a composite pipe having a different predetermined direction is manufactured in the pipe parts adjacent to each other,
A cutting step of cutting a long strip-shaped workpiece with a predetermined trajectory in the longitudinal direction, and forming a strip with a side edge extending in the longitudinal direction having a predetermined shape;
A first goby forming step for forming a first goby on one side edge of the strip;
Forming a second goby that engages with the first goby on the other side edge of the strip;
A plurality of the tube portions are formed by spirally winding a band material in which the first goby and the second goby are formed and engaging the first goze and the second goby that are adjacent to each other. A continuous winding step;
A composite pipe manufacturing method comprising: A rib forming step of forming reinforcing ribs extending in the circumferential direction on at least one of the pipe portions;
The composite pipe manufacturing method according to claim 8. The winding forming step winds the strip along the inner surface of an annular forming jig,
The composite pipe manufacturing method according to any one of claims 8 and 9.

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