JP5474505B2 - Connection structure of synthetic resin pipe with spiral wave with receiving part, synthetic resin pipe with helical wave with insertion part and synthetic resin pipe with helical wave - Google Patents

Description

  The present invention relates to a synthetic resin pipe with a spiral wave and a connection structure of a synthetic resin pipe with a spiral wave, the pipe wall having a spiral wave shape, for example, used as a drainage pipe under a road or a large drainage pipe for sewerage. Is.

  Conventionally, concrete fume pipes are generally used as drainage pipes under roads and sewerage, but in recent years they have strengths equal to or higher than those of fume pipes, and they are more durable and lighter. In addition, a corrugated synthetic resin pipe that is advantageous in saving labor during construction, specifically, a pipe having a reinforcing projection spirally provided on the outer peripheral side of the main body having a substantially flat inner surface is used.

  When connecting such a corrugated synthetic resin pipe, arrange a half joint with a connecting flange with a packing sheet set on the inner surface side at each end facing each other, and between the water blocking block and the recess Fill the gap with caulking material, wind it around the pipe while pulling the packing sheet sufficiently, fix it with vinyl tape, etc., then cover the other half joint from above, and fasten the flanges of both half joints with bolts and nuts. The structure to be adopted is adopted.

  However, this type of connection structure requires a pair of upper and lower halved joints, packing sheets, caulking materials, etc. to be assembled in the field according to the connection procedure, which takes a lot of time and effort, reduces work efficiency, and reduces the number of parts. Many management was troublesome. In particular, the work of moving the two pipes to a specific position on the packing sheet after placing the packing sheet on the inner surface side of the halved joint is a heavy burden on the operator. The tension of the sheet varies from person to person, causing variations in quality.

  On the other hand, as a connection structure that allows connection work to be performed more easily and quickly, a connection flange is provided at the end of the corrugated synthetic resin pipe by welding, a packing is provided on the contact surface between the flanges, and the flanges are connected. A connection structure that is tightened with bolts and nuts has been proposed (see, for example, Patent Document 1). According to such a connection structure, workability can be improved as compared with the conventional half joint, and a more reliable connection structure can be provided.

  However, this connection flange requires the work of connecting with bolts and nuts, which causes a reduction in work efficiency. In addition, if the welded part of the flange on the pipe end is not tightly sealed, water leakage will occur, and if the flange surface is deformed, it will also cause water leakage. High quality is required for strength, shape and dimensions, and there is a limit to cost reduction, and the presence of a strong flange and bolts and nuts to connect it unavoidably increases the weight of the connection part. In addition, since the flange surfaces are connected via packing, there is a limit to the water resistance and pressure resistance to the outside of the part, and there is a limit to improving the working efficiency, such as even tightening of bolts and nuts is required. there were.

  In addition, this type of large synthetic resin pipe has an inner diameter of 1000 mm or more and is almost set to a long dimension of about 5 m, and handling such as unloading and unloading must be handled carefully. First, there is a problem that the end of the tube is damaged when dropped.

JP 2002-139178 A

  Therefore, in view of the above-mentioned situation, the present invention intends to solve a simple structure with a small number of parts, sufficient water resistance and pressure resistance and a good seal without requiring a strong material and high accuracy. Synthetic resin pipe with spiral wave and synthetic resin pipe with spiral wave that can be reduced in weight and cost, easy to handle, and easy to connect on site. It is to provide a connection structure.

  The present invention includes a) a first form relating to a synthetic resin pipe with a spiral wave with a joint, and b) a second form relating to a connection structure between the synthetic resin pipes with a spiral wave with a joint.

a) 1st form of this invention This invention is a synthetic resin pipe with a spiral wave with a joint provided with the receiving part for connecting the synthetic resin pipes with a spiral wave to pipe ends,
A receiving port extending in a tubular shape from the end of the synthetic resin tube with spiral wave toward the tube axis direction is formed of a foamable resin, and is formed on at least the outer peripheral surface of the connection side end of the formed receiving port. A synthetic resin tube with a spiral wave with a joint, in which an FRP layer in which a reinforcing fiber is impregnated with a resin is formed.

  The FRP layer in the present invention includes those composed of a plurality of layers.

  In the present invention, the FRP layer can be further formed on the end face of the receiving port.

  In the present invention, a reinforcing material can be provided in the receiving portion.

  In the present invention, as the reinforcing member, a synthetic resin pipe component with a spiral wave having an inner diameter larger than the outer diameter of the spiral wave-equipped tube can be embedded coaxially with the synthetic resin tube with the spiral wave.

  Further, as the reinforcing material, a synthetic resin tube part with a spiral wave having an inner diameter larger than the outer diameter of the spiral wave tube with a part of the outer peripheral surface exposed, and the synthetic resin tube with a spiral wave Can be buried coaxially.

  Further, as the reinforcing member, a circular pipe component having an inner diameter larger than the outer diameter of the spiral wave-equipped tube can be embedded coaxially with the synthetic wave tube with the spiral wave.

  Further, as the reinforcing material, reinforcing fiber chips can be embedded in a dispersed state.

  Further, as the reinforcing material, a circular pipe part having an inner diameter larger than the outer diameter of the spiral wave tube is embedded coaxially with the synthetic resin tube with the spiral wave and embedded in a state where the reinforcing fiber chips are dispersed. can do.

  In the present invention, the reinforcing fiber can be composed of a chopped strand mat in which glass fibers are formed in a tape shape or a sheet shape, a plain weave glass cloth, or the like.

  In the present invention, the spiral wave can be composed of a laminate of a steel plate having a convex cross section formed in a spiral shape and a synthetic resin covering the steel plate.

b) Second aspect of the present invention The present invention includes a synthetic resin tube with a spiral wave with a joint having the above-described configuration, and an insertion port portion to be inserted into the port portion of the synthetic resin tube with a spiral wave with a joint. A synthetic resin tube with a spiral wave composed of a synthetic resin tube with a spiral wave with an insertion opening,
The insertion opening portion has a length substantially the same as the length of the receiving portion extending in the tube axis direction, and a synthetic resin tube with a spiral wave having a smooth outer peripheral surface that can be engaged with the receiving portion. Connection structure.

  In the present invention, as the insertion opening, a belt-shaped resin having a convex cross section that can be engaged with the spiral groove is wound around the spiral groove at the connection side end of the synthetic resin tube with spiral wave, and the smooth An outer peripheral surface can be formed.

  Further, as the insertion opening, a foaming resin can be filled in the spiral groove at the connection side end of the synthetic resin tube with a spiral wave to form the smooth outer peripheral surface.

  An FRP layer in which a reinforcing fiber is impregnated with a resin can be formed on at least the outer peripheral surface of the connection side end of the insertion opening.

  Further, the FRP layer can be further formed on the end face of the insertion opening.

  In the present invention, the reinforcing fiber can be composed of a chopped strand mat in which glass fibers are formed in a tape shape or a sheet shape, a plain weave glass cloth, or the like.

  In the present invention, a circular pipe component having an inner diameter larger than the outer diameter of the spiral corrugated tube can be embedded coaxially with the synthetic resin tube with spiral waves in the insertion opening.

  In the present invention, the reinforcing fiber chip can be embedded in the insertion port portion in a dispersed state.

  In the present invention, a circular pipe component having an inner diameter larger than the outer diameter of the spiral corrugated tube is embedded in the insertion port portion coaxially with the synthetic resin tube with spiral waves, and reinforcing fiber chips are dispersed. Can be buried in the state.

  In this invention, the sealing material which seals the clearance gap between the said insertion opening part and the said receiving opening part can be provided in the said insertion opening part.

  According to the present invention, the insertion port portion formed in one synthetic resin tube with spiral waves and the receiving port portion that extends in a cylindrical shape from the end of the other synthetic resin tube with spiral waves are fitted together. Thus, the connection work can be easily performed, and the bolts and nuts are not required to be evenly tightened as in the case where a conventional connection flange is provided, so that the work efficiency can be improved.

  In addition, in the fitting structure of the insertion port and the receiving port, the receiving port has a structure that securely wraps the insertion port, so that sufficient water resistance and pressure resistance can be obtained without requiring a strong material and high accuracy. It has good sealing properties, and can be reduced in weight and cost and manufactured easily as compared with the conventional work of attaching the connecting flange in a watertight and accurate manner.

  Further, since an FRP layer in which a reinforcing fiber is impregnated with resin is formed on at least the outer peripheral surface of the connection side end portion in the receiving portion, in the unlikely event of unloading at a site where the ground is poor, a spiral wave Even if the attached synthetic resin tube falls, the end portion of the synthetic resin tube with a spiral wave can be protected from breakage and deformation.

  Moreover, in the structure which provided the reinforcing material in the foamable resin of the said receiving part, weight reduction and cost reduction can be achieved, aiming at the strength improvement of a receiving part.

  In particular, those using a synthetic resin pipe part with spiral waves or a circular pipe part as a reinforcing material can be provided with higher water resistance and pressure resistance in addition to increasing the strength of the receiving part.

  Moreover, when the synthetic resin pipe part with spiral wave is provided in the synthetic resin pipe with spiral wave in a partially exposed state, the weight can be reduced and the material cost can be reduced, and the outer wall is the pipe wall of the synthetic resin pipe with spiral wave. The overall appearance of the tube is increased and the appearance is improved.

It is a general view which shows the connection state of the synthetic resin pipe | tube with a spiral wave with a joint which concerns on this invention. It is an expanded sectional view of the connection part of FIG. (A) is principal part sectional drawing which shows the pipe wall of a synthetic resin pipe | tube with a spiral wave, (b) is principal part sectional drawing which shows the modification of a pipe wall. FIG. 3 is a view corresponding to FIG. 2 showing a modification of the receiving part. It is a FIG. 1 equivalent view which shows 2nd Embodiment of the synthetic resin tube with a spiral wave with a joint which concerns on this invention. It is an expanded sectional view of the connection part of FIG. It is a FIG. 2 equivalent view which shows 3rd Embodiment of the synthetic resin pipe | tube with a spiral wave with a joint which concerns on this invention. It is FIG. 2 equivalent view which shows the modification of an insertion port part. FIG. 9 is a view corresponding to FIG. 2 showing a further modification of the receiving port and the insertion port. FIG. 9 is a view corresponding to FIG. 2 and shows another modification of the receiving port and the insertion port. It is a general view which shows the connection state of 4th Embodiment of the synthetic resin pipe | tube with a spiral wave with a joint which concerns on this invention. It is a general view which shows the synthetic resin pipe | tube with a helical wave with a joint of FIG. It is an expanded sectional view of the connection part of FIG. It is explanatory drawing which shows the manufacturing method of a synthetic resin pipe | tube with a spiral wave. FIG. 9 is a view corresponding to FIG. 2 and showing another example of a pipe material that constitutes a receiving portion. It is a flowchart which shows the manufacture procedure of the synthetic resin tube with a spiral wave which concerns on this invention. (a) is explanatory drawing which shows the crack state of the synthetic resin pipe | tube with a spiral wave with a joint which is not provided with the FRP layer, (b) is a principal part enlarged view of Fig.17 (a). (a) is explanatory drawing which shows the state after the drop test of the synthetic resin pipe | tube with a spiral wave of this invention, (b) is a principal part enlarged view of Fig.18 (a).

  Hereinafter, the synthetic resin tube with a spiral wave of the present invention and the connection structure thereof will be described in detail with reference to the drawings.

  The applicant of the present application has previously filed Japanese Patent Application No. 2009-53266 (unpublished) characterized by reinforcement of the entire receiving section as a related application. On the other hand, the present invention is characterized in that the outer surface of the receiving portion is protected from damage regardless of whether the entire receiving portion is reinforced or not.

  FIG. 1 is an explanatory view showing a connection structure S of synthetic resin pipes 1A and 1B with spiral waves according to the present invention, FIGS. 1 to 4 are a first embodiment of the present invention, and FIGS. 5 and 6 are a second embodiment. 7 and 8 show the third embodiment, and FIGS. 11 to 16 show the fourth embodiment. In the drawings, reference numerals 1A, 1B and 1C denote synthetic resin tubes with spiral waves, 2 a tube wall, 3 an insertion port, Reference numeral 4 denotes a receiving part.

  As shown in FIGS. 1 and 2, the connection structure S of the synthetic resin pipe with spiral wave of the present invention comprises two synthetic resin pipes 1A and 1B with spiral wave formed by forming the pipe wall 2 into a spiral wave shape. The ends are connected to each other.

  In the present embodiment, the synthetic resin tubes with spiral waves 1A and 1B are each provided with an insertion port 3 at one end portion 10 (left end portion in the drawing) and a receiving port at the other end portion 11 (right end portion in the drawing). However, the connection structure of the present invention is not limited to such a tube connection structure having both ends, and the insertion port 3 is provided at least at the facing ends of both tubes. And the end 4 on the opposite side of each pipe may not be provided with the opening or the insertion opening.

  First, a first embodiment will be described with reference to FIGS.

1. First Embodiment The tube walls 2 of the synthetic resin tubes 1A and 1B with spiral waves are formed in a spiral wave shape, and at one end portion 10 (the left end portion in the figure) of each tube as shown in FIG. The cylindrical insertion port 3 is formed by applying a synthetic resin layer filling at least the concave portion 2a forming the wave shape on the outer surface side of the one end portion 10, and the other end portion 11 (the right end portion in the figure). ) Is formed with a receiving portion 4 made of a synthetic resin, which is attached to the outer surface of the other end portion 11 and extends in a cylindrical shape on the outer side in the axial direction (right direction in the figure).

  As shown in FIG. 3A, the pipe wall 2 of each pipe has a substantially triangular shape, a substantially arc shape, or a trapezoidal crest and trough continuously forming a wave, and a trough between the crests. The part to include becomes the recess 2a.

  In the present embodiment, a substantially triangular shape or a substantially circular shape made of a resin molded body (for example, a coated steel plate) in which a steel material (steel plate having a convex cross section) 22 is provided on the outer peripheral side of a synthetic resin main body portion 20 whose inner surface is substantially flat. The arc-shaped reinforcing convex portion 21 is provided in a spiral shape, and the reinforcing convex portion 21 that forms a mountain portion with the main body portion 20 is formed by melting and extruding a partially molded body of the main body portion 20 and spirally winding it on a rotating shaft. When the welding is sequentially performed, the reinforcing projections 21 can be similarly spirally supplied and integrated on the partial molded body.

  In addition, you may comprise the reinforcement convex part 21 which has comprised the peak part only from the resin layer, without attaching the steel material 22 inside. Moreover, the shape of a peak part and a trough part is not specifically limited, You may comprise in a substantially V shape, a substantially U shape, a substantially circular shape, a substantially elliptical shape, a substantially square shape, a polygonal shape, an irregular shape, and other shapes.

  Furthermore, in this embodiment, there is a main body 20 extending from the valley on the inner peripheral side of the mountain, and the main body 20 is configured so that the inner surface of the tube has a flat shape. 20 may be omitted, and the reinforcing convex portions 21 may be connected to each other, and the inner surface side may also be a spiral corrugated surface.

  Moreover, as shown in FIG.3 (b), what is provided with the recessed part 23 in the peak part is also a preferable Example. By providing such a recessed portion 23, pressure (earth pressure, etc.) applied to the ridge is dispersed, and the strength and rigidity of the ridge can be increased, and the pressure resistance of the entire tube wall 2 can be increased. . The presence of the recess 23 is a cause of fluid leakage in the conventional pipe connection structure. However, if the connection structure of the present invention is employed, the pipe having such a recess 23 exists. Can be connected without causing any leakage. In the example of FIG. 3B, an outer surface layer 24 is further applied along the outer surface of the substantially M-shaped reinforcing convex portion 21 made of a coated steel plate.

  Synthetic resin materials used for the crests and troughs of these pipe walls 2, specifically the main body part 20, the reinforcing convex part 21, and the outer surface layer 24, are synthetic polyolefins such as polyethylene and polypropylene, synthetic resins such as vinyl chloride Resins and the like can be widely used, and other synthetic rubbers and soft resins can also be used.

  As shown in FIG. 2, the insertion opening 3 formed in the one end portion 10 of each of the synthetic resin tubes with spiral waves 1A and 1B fills at least the concave portion 2a forming the wave shape on the outer surface side of the one end portion 10. A synthetic resin layer 5 is applied to form a cylindrical shape whose outer surface is substantially flat along the axial direction, and can be in close contact with the inner peripheral surface of the receiving port 4 described later. In this embodiment, the synthetic resin layer 5 is formed by surrounding the one end portion 10 with a mold and injecting and curing the synthetic resin material. However, the present invention is not limited to this, and the synthetic resin layer 5 is separately molded. It is possible to attach the resin layer 5 to the end portion 10 and integrate them by heat fusion or the like, or to apply the synthetic resin layer 5 by other methods.

  Further, the one end portion 10 is pressure-deformed in the direction of diameter reduction to reduce the diameter by crushing the reinforcing convex portion 21 so that the concave portion 2a having a predetermined depth remains, and the synthetic resin layer 5 is deposited thereon. Thus, it is possible to configure the insertion port 3 to have a diameter smaller than that of the tube wall 2. According to this, the size of the receiving port part 4 comprised in the other end part 11 becomes smaller, and the size of the whole connection part which consists of the insertion port part 3 and the receiving port part 4 can also be made smaller.

  The synthetic resin material constituting the synthetic resin layer 5 may be either non-foamed or foamed, and olefinic resins such as polyethylene resin and polypropylene resin and other synthetic resins can be used. For example, polystyrene foam, polyethylene foam, rigid polyurethane foam, flexible polyurethane foam, rigid vinyl chloride foam, urea foam, phenol foam, acrylic foam, cellulose acetate foam, and other resins can be used.

  In this embodiment, the synthetic resin layer 5 is deposited so that the peak portion of the end portion 10 is completely hidden. However, the peak portion may be partially exposed so that a substantially flat surface can be maintained. The synthetic resin layer 5 may be applied thickly so that the outer surface is further outward than the portion.

  As shown in FIG. 2, the receiving port 4 has a pipe member 7 having a diameter larger than that of the synthetic resin tube 1 </ b> B with the spiral wave with respect to the other end portion 11. It is connected to the outer surface side so as to protrude outward in the axial direction, and the synthetic resin layer 8 is also filled and deposited in the gap between the tubular material 7 and the synthetic resin tube 1B with spiral wave so that the tubular material 7 is completely hidden. The inner peripheral surface of the cylindrical portion protruding outward in the axial direction is substantially flat along the axial direction and functions as a receiving surface 40 into which the insertion port 3 is inserted.

  The mounting screw 9 is provided for fixing the position of the synthetic resin layer 8 until the synthetic resin layer 8 is attached, and is preferably fixed to the mountain portion so as not to penetrate the tube wall 2, but a separate temporary fixing member is interposed. Of course, the mounting screw 9 can be omitted.

  Similarly to the insertion port 3, the receiving port 4 is also formed by surrounding the other end 11 and the tube material 7 with a mold and injecting and curing a synthetic resin material. It is also possible to separately form the synthetic resin layer 8 containing, and attach the synthetic resin layer 8 to the end portion 11 and integrate them by heat fusion or the like, or attach the synthetic resin layer 8 by other methods. Further, the synthetic resin material similar to that of the insertion port 3 can be used for the material of the synthetic resin layer 8.

  The tube material 7 is a tube portion in which a substantially triangular shape, a substantially arc shape, or a trapezoidal crest and trough are continuously waved like the synthetic resin tubes 1A and 1B with spiral waves. The strength is considerably increased by the presence of the pipe material 7.

  In this embodiment, a pipe portion that forms a wave having the same structure as that of the synthetic resin pipes 1A and 1B with spiral waves is used. However, the present invention is not limited to this, and the spiral provided with the pipe wall 2 shown in FIG. For the corrugated synthetic resin pipe 1B, as shown in FIG. 3B, a tube material 7 having a cross-sectional shape having a recessed portion 23 at the peak is used, or conversely, the pipe wall 2 shown in FIG. 3B is provided. For the synthetic resin pipe 1B with a spiral wave, it is possible to use a pipe material 7 that does not have a concave portion at the peak as shown in FIG. 3 (a). Further, as shown in FIG. It is good also as the comprised pipe material 7A.

  In addition, in the example of FIG. 4, the engagement protrusion 70 engaged with the crest part of the pipe wall 2 is provided in the inner peripheral surface of the straight pipe part, and this functions as a retaining and the strength of the receiving part 4 Is configured to enhance.

  These pipe materials 7 (7A) are mainly used for maintaining the strength of the cylindrical portion protruding outward in the receiving port 4 and receiving the insertion port 3. However, the dimensions and materials can maintain the strength. It is also possible to omit the insert member such as the tube material 7 and configure the receiving portion 4 with only the synthetic resin layer 8. The tube material 7 (7A) and the outer peripheral surface of the tube wall 2 are firmly integrated by the synthetic resin layer 8 interposed therebetween. The synthetic resin layer 8 constituting the receiving portion 4 may be reinforced by embedding reinforcing materials such as reinforcing fibers and nets as necessary.

  Specifically, as shown in FIG. 2, when the outer peripheral surface of the connection side end of the receiving port 4 is reinforced, an FRP layer 8 a can be provided on the outer peripheral surface.

The FRP layer 8a is formed by impregnating a reinforcing fiber with a synthetic resin material. As the reinforcing fiber, a chopped strand mat as a glass fiber base material for FRP formed in a tape shape or a sheet shape, A suitable basis weight of 100 to 300 g / m ² can be used. Further, a plain weave glass cloth or glass cloth tape for FRP, a preferable range of density, 16 to 25 in length, and 15 to 23 in width / 25 mm can also be used. In addition, the said tape shape means what was cut into tape shape previously.

  When the synthetic resin layer 8 is formed by injecting a foamed synthetic resin, the reinforcing fiber is impregnated with the synthetic resin in the foaming process of the foamed synthetic resin in the mold and cured to form the FRP layer 8a. Is done.

  Further, when the synthetic resin layer 8 is formed of a non-foamed synthetic resin, the synthetic resin layer 8 including the tube material 7 is separately formed, and is attached to the end portion 11 and integrated by heat fusion or the like. The FRP layer 8a can also be formed by adhering a compression-molded FRP sheet obtained by impregnating a synthetic fiber into a reinforcing fiber in advance with an adhesive or the like on the outer peripheral surface of the receiving port formed as described above.

  In this case, a plurality of FRP sheets can be stacked to form the FRP layer 8a.

  In this way, when the outer peripheral surface of the connection side end of the receiving port 4 is reinforced with the FRP layer 8a, a large-sized pipe having an inner diameter of 1000 mm or more and a length of about 5 m is used as a truck bed. When the pipe is lowered by a forklift, the pipe end can be protected from damage even if the synthetic resin pipe with a spiral wave is dropped.

  Further, the FRP layer 8 a that can reinforce the outer peripheral surface of the connection side end of the receiving port 4 can also be applied to the insertion port 3.

  Specifically, the FRP layer 5a having the same configuration as the FRP layer 8a can be formed on the outer peripheral surface of the connection side end portion of the insertion port portion 3, and the outer periphery of the connection side end portion of the insertion port portion 3 in this way. When the surface is reinforced with the FRP layer 5a, the insertion port 3 can be protected from damage as well as the receiving port 4.

  In the synthetic resin pipe with a spiral wave, the configuration is different between the receiving port 4 and the insertion port 3, and the receiving port 4 is heavier than the insertion port 3. There is a high possibility of falling from the part 4 side first. Therefore, the FRP layer 8a must be formed on the connection-side outer peripheral surface of the receiving port 4 and the FRP layer 5a formed on the insertion port 3 may have an arbitrary configuration.

  In addition, in this embodiment, although the insertion port part 3 and the receiving port part 4 were each comprised in the substantially flat shape along the axial direction, this invention is not limited to such a straight shape at all, The insertion port part 3 Is formed in a taper shape that tapers toward the opening end, and the inner peripheral surface of the receiving port portion 4 is formed in a taper shape having substantially the same angle substantially parallel to the same, or the outer diameter or receiving port of the insertion port portion. You may make it the shape which changes so that the internal diameter of an opening | mouth part may draw a curve along an axial direction.

  Further, an O-ring 6 is interposed between the insertion port 3 and the receiving port 4 as a seal member. Specifically, an annular groove 50 into which the O-ring 6 is fitted is formed on the outer surface of the insertion opening 3, and the pipes are connected with the O-ring 6 fitted into the annular groove 50.

  In the present embodiment, the annular groove 50 in which the O-ring 6 is mounted is formed by cutting out at the distal end edge of the insertion slot 3, but at the base edge or the middle part on the opposite side of the insertion slot 3. It may be formed. Moreover, you may provide in the receptacle part 4 side. The shape and structure of the sealing member such as the O-ring 6 is not particularly limited as long as the space between the insertion port 3 and the receiving port 4 can be reliably sealed, and various shapes and structures of sealing members are mounted at appropriate positions. Can be done. Further, instead of mounting the O-ring 6 separately, it is also possible to integrally form an annular projection serving as a seal portion in advance.

2. Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS.

  In the present embodiment, the synthetic resin layer 8 is applied in a state where the tube material 7 constituting the receiving portion 4 is partially exposed, and is particularly integrated with the distal end side and the tube wall 2 where strength is required. In this respect, the base end side which is important is buried in the synthetic resin layer 8, and the other intermediate part is exposed. If the tube material 7 is exposed in this manner, weight reduction and material cost reduction can be realized, and when the tube material 7 has the same external structure as the tube wall 2 as in the present embodiment, the receiving portion 4 is concerned. The exposed portion has the same appearance as that of the tube wall 2, the unity of the joint portion and the entire tube is increased in appearance, and the appearance is improved. Since other configurations and modifications are basically the same as those in the first embodiment, the same reference numerals are given to the same structures, and descriptions thereof are omitted.

  In the drawing, reference numeral 8a denotes an FRP layer formed to reinforce the outer peripheral surface of the connection side end of the receiving port 4.

3. Third Embodiment Next, a third embodiment will be described with reference to FIGS.

  In this embodiment, instead of the tube material 7 constituting the receiving portion 4, the synthetic resin portion (synthetic resin layer 8) of the receiving portion 4 contains the reinforcing fiber 7B. In this embodiment, The reinforcing fibers 7B are embedded in the form of a woven fabric, a nonwoven fabric, or a molded body solidified with a resin. Thereby, compared with what embeds the pipe material 7, the intensity | strength improvement of the same grade is aimed at, aiming at a significant weight reduction and cost reduction. In this embodiment, the concave portion 23 shown in FIG. 3B is provided at the peak portion of the reinforcing convex portion 21 of each tube. However, as in the first embodiment, various corrugated synthetic resin tubes are used. Of course, it is applicable to.

  As the reinforcing fiber, it is preferable to use glass fiber or glass fiber. When the receiving portion 4 is molded with a synthetic resin, a woven fabric, a nonwoven fabric or a resin molded body of the reinforcing fiber 7B is set in a mold in advance. Can be embedded and molded. As another method, the molding of the receiving portion 4 is divided into two moldings of the inner part and the outer part, and the woven fabric of the reinforcing fiber 7B is formed on the outer surface when the molding of the first inner part is finished. It is also possible to perform embedding molding by attaching a non-woven fabric or a resin molded body and performing a second molding thereon.

  The woven fabric, non-woven fabric, or resin molded body of the reinforcing fiber 7B may be provided so as to exist almost entirely around the inside of the receiving portion 4, or may be provided with a single or a plurality so as to exist only partially. May be. What is necessary is just to interior what was shape | molded in the sheet form or the cylinder shape as a resin molding, and using the same resin as the synthetic resin layer 8 which comprises the opening part 4 as resin used for a resin molding point is an adhesive point. Is preferable. In addition, you may comprise so that the woven fabric of the reinforcement fiber 7B, a nonwoven fabric, or the resin molding may be affixed on the outer surface of the receiving part 4. FIG.

  In the figure, 8a is an FRP layer formed to reinforce the outer peripheral surface of the connection side end of the receptacle 4.

  FIG. 8 shows an example in which the reinforcing fiber 7B is contained in the synthetic resin layer 5 of the insertion port 3 as well as the receiving port 4, and similarly, a woven fabric, a nonwoven fabric or a resin molded body of the reinforcing fiber 7B is shown. Embedded molding can be performed by previously setting in a mold and molding. The insertion port 3 contains the reinforcing fiber 7B as in the present embodiment, and the receiving port 4 is provided with the tube material 7 of the first embodiment in place of the reinforcing fiber 7B, or any reinforcing member. Of course, it is also possible not to insert.

  Moreover, although the present Example demonstrated the example which provided the woven fabric, nonwoven fabric, or resin molding of the reinforcement fiber 7B in the receptacle part 4 or the insertion port part 3, as shown in FIG. 9, as shown in FIG. It is preferable that the overall strength of the synthetic resin part can be increased by adding a short cut) to the synthetic resin material to be molded and mixing with the synthetic resin material for molding the mouth portion 3 and the receiving portion 4. Furthermore, as shown in FIG. 10, it is also a preferable example to further increase the strength in combination with the woven fabric, nonwoven fabric or resin molded body of the reinforcing fiber 7B described above. Other configurations and modifications (such as the position of the O-ring) are basically the same as those in the first embodiment, and thus the same reference numerals are given to the same structures, and descriptions thereof are omitted.

  9 and 10, reference numeral 8 a denotes an FRP layer formed to reinforce the outer peripheral surface of the connection side end of the receiving port 4.

4). Fourth Embodiment Next, a fourth embodiment will be described with reference to FIGS.

  As shown in FIGS. 11 and 12, the synthetic resin tube with spiral wave 1 </ b> C according to the present embodiment is configured by forming the tube wall 2 in a spiral wave shape, and at least one end of the one end (left end in the figure). A cylindrical insertion port 3 is provided by attaching a synthetic resin layer 5 filling a concave portion forming a wave shape on the outer surface side, and the other end portion is provided at the other end portion 102a (right end portion in the figure). In the case of providing the receiving portion 4 made of the synthetic resin layer 8 that is attached to the outer surface side and extends in a cylindrical shape on the outer side in the axial direction, a plurality of synthetic resin pipes 1C with spiral waves are connected to each other. The insertion port 3 of the synthetic resin tube 1C with spiral wave (middle right) is inserted into the receiving port 4 of the second synthetic resin tube with spiral wave (left side in the figure) and connected to each other. is there.

  In the present invention, in particular, as shown in the longitudinal sectional view of FIG. 13, the receiving portion 4 is formed by coaxially connecting the pipe material 7 having a diameter larger than that of the synthetic resin tube with spiral wave 1C on the outer surface side of the other end portion 102a. The synthetic resin material of the synthetic resin layer 8 is filled in at least a gap between the pipe material 7 and the synthetic resin pipe with spiral wave 1C.

  As shown in FIG. 13, the tube wall 2 has a substantially triangular or arcuate or trapezoidal crest and trough continuously waved, and the portion including the trough between the crests is a recess. Become. In this embodiment, a substantially triangular or substantially arc-shaped reinforcing convex portion 21 made of a resin molded body (for example, a coated steel plate) in which a steel material 22 is housed is provided on the outer peripheral side of a synthetic resin main body portion 20 having a substantially flat inner surface. It is provided in a spiral shape.

  The reinforcing convex portion 21 may be composed of only a resin layer without interior of the steel material 22. Moreover, the shape of a peak part and a trough part is not specifically limited, You may comprise in a substantially V shape, a substantially U shape, a substantially circular shape, a substantially elliptical shape, a substantially square shape, a polygonal shape, an irregular shape, and other shapes. Furthermore, in this embodiment, there is a main body 20 extending from the valley on the inner peripheral side of the mountain, and the main body 20 is configured so that the inner surface of the tube has a flat shape. 20 may be omitted, and the reinforcing convex portions 21 may be connected to each other, and the inner surface side may also be a spiral corrugated surface.

  More specifically, the steel material 22 is also a preferred embodiment in which a concave portion 23 is provided at the peak. By providing such a recessed portion 23, pressure (earth pressure, etc.) applied to the ridge is dispersed, and the strength and rigidity of the ridge can be increased, and the pressure resistance of the entire tube wall 2 can be increased. . In this embodiment, an outer surface layer 24 is further applied along the outer surface of the steel material 22. As the synthetic resin material used for the crests and troughs of these pipe walls 2, specifically, the main body part 20 and the outer surface layer 24, polyolefin resins such as polyethylene and polypropylene, and synthetic resins such as vinyl chloride are widely used. Other synthetic rubbers and soft resins can also be used.

  As shown in FIGS. 12 and 13, the insertion portion 3 on one end side of the synthetic resin tube with spiral waves has the synthetic resin layer 5 so as to fill at least the concave portion forming the wave shape on the outer surface side of the one end portion. The outer surface is formed into a substantially flat cylindrical shape along the axial direction, and is in close contact with the inner peripheral surface of the receiving portion 4 at the other end. In this embodiment, the synthetic resin layer 5 constituting the insertion port 3 is formed by surrounding the one end portion with a molding die and injecting and curing a synthetic resin material. It is also possible to deposit layer 5. The synthetic resin material constituting the synthetic resin layer 5 may be either non-foamed or foamed, and olefinic resins such as polyethylene resin and polypropylene resin and other synthetic resins can be used. For example, polystyrene foam, polyethylene foam, rigid polyurethane foam, flexible polyurethane foam, rigid vinyl chloride foam, urea foam, phenol foam, acrylic foam, cellulose acetate foam, and other resins can be used.

  As shown in the longitudinal sectional view of FIG. 13, the receiving end 4 on the other end side is formed by coaxially connecting a pipe material 7 having a diameter larger than that of the synthetic resin pipe with spiral wave 1C from the outer surface side of the other end 102a. A cylindrical shape that protrudes outward in the axial direction, in which a synthetic resin material of the synthetic resin layer 8 is filled in at least a gap between the pipe material 7 and the synthetic resin tube with spiral wave 1C. The inner peripheral surface of the portion is substantially flat along the axial direction, and functions as a receiving surface 40 into which the insertion port 3 is inserted. The synthetic resin layer material similar to that of the insertion port 3 can also be used for the synthetic resin layer 8 of the receiving port 4.

  In the present embodiment, the insertion opening 3 and the receiving opening 4 are each formed in a substantially flat shape along the axial direction. However, the present invention is not limited to such a straight shape, and the insertion opening 3 is opened. The taper is tapered toward the end, and the inner peripheral surface of the receiving port 4 is configured to have a taper shape of substantially the same angle substantially parallel to the tapered portion, or the outer diameter of the insertion port or the receiving port. The inner diameter may be changed so as to draw a curve along the axial direction.

  In addition, it is also preferable to configure the receiving surface 40 of the receiving port 4 in a reverse taper shape that is reduced in diameter from the inner side toward the outer opening, thereby achieving water tightness and tightness of the O-ring 6 of the insertion port 3. . Further, a stepped taper portion 42 is provided at the opening of the receiving portion 4 so that the O-ring 6 is caught by the opening when the insertion portion 3 is inserted and is not dropped off.

  As with the synthetic resin pipe with spiral wave 1C, the pipe material 7 housed in the receiving part 4 is a pipe part in which a substantially triangular shape, a substantially arc shape, or a trapezoidal peak and trough continuously wave. Thus, the strength of the receiving port 4 is considerably increased by the presence of the pipe material 7. In this embodiment, the pipe wall 71 is formed in a spiral wave shape, and a pipe material (however, there is no main body part 20 on the inner peripheral side) that forms a wave having the same structure as the synthetic resin pipe with spiral wave 1C is used. Although the same reference numerals are attached and details are omitted, the present invention is not limited to the pipe material having such a configuration.

  As a modification of the tube material 7, as shown in FIG. 15, a tube body provided with a main body portion 20a on the inner peripheral side is also a preferable example. The tube material 7 and the outer peripheral surface of the tube wall 2 are firmly integrated by the synthetic resin layer 8 interposed therebetween.

  A synthetic resin layer 8 is attached to the tube material 7 in a partially exposed state. In particular, the proximal end side, which is important in terms of integration with the distal end side where the strength is required, and the tube wall 2 is buried with the synthetic resin layer 8, and other intermediate portions are exposed. If the tube material 7 is exposed in this manner, weight reduction and material cost reduction can be realized, and when the tube material 7 has the same external structure as the tube wall 2 as in the present embodiment, the receiving portion 4 is concerned. The exposed portion has the same appearance as that of the tube wall 2, the unity of the joint portion and the entire tube is increased in appearance, and the appearance is improved.

  As shown in FIG. 13, an O-ring 6 is interposed between the insertion port 3 and the receiving port 4 as a seal member. Specifically, an annular groove 50 into which the O-ring 6 is fitted is formed on the outer surface of the insertion port portion 3, and the tubes are connected with the O-ring 6 fitted into the annular groove 50. In the present embodiment, the annular groove 50 in which the O-ring 6 is mounted is notched at the distal end edge of the insertion slot 3, but is formed at the base edge or the middle part on the opposite side of the insertion slot 3. May be. Moreover, you may provide in the receptacle part 4 side. The shape and structure of the sealing member such as the O-ring 6 is not particularly limited as long as the space between the insertion port 3 and the receiving port 4 can be reliably sealed, and various shapes and structures of sealing members are mounted at appropriate positions. Can be done. Further, instead of mounting the O-ring 6 separately, it is also possible to integrally form an annular projection serving as a seal portion in advance. A coating agent that can improve waterproofness, weather resistance, and chemical resistance may be coated on the outer surface of the synthetic resin tube with spiral wave 1 </ b> C including the insertion port 3 and the receiving port 4 at both ends.

  Moreover, also about the insertion port part in the said 2nd Embodiment-4th Embodiment, the FRP layer 5a can be provided in the connection side edge part in an outer peripheral surface similarly to the said 1st Embodiment.

  Moreover, in the said 1st Embodiment-4th Embodiment, although the FRP layer was formed in the connection side edge part in a port part outer peripheral surface and the connection side edge part in an insertion port part outer peripheral surface, the connection side end surface of a port part The FRP layer can also be formed across part or all of the connection side end face of the insertion opening.

  When the FRP layer is formed so as to extend from the outer peripheral surface to the end surface in this way, the outer peripheral corner portion on the receiving port connecting side is more reliably reinforced.

5. Manufacturing Method of Synthetic Resin Tube with Spiral Wave Next, a manufacturing method of the synthetic resin tube with spiral wave 1C will be described with reference to FIGS.

  As shown in FIG. 16, the manufacturing procedure of the synthetic resin tube with spiral wave 1 </ b> C includes the step S <b> 1 of forming the tube wall 2 of the synthetic resin tube with spiral wave 1 </ b> C, and the composite with spiral wave formed continuously. A step S2 of coaxially forming a pipe material 7 having a diameter larger than that of the synthetic resin pipe with a spiral wave at the other end 102a of the resin pipe 1C, and axially inner and outer ends of the molded pipe material 7 are respectively provided. Synthetic resin material for forming the synthetic resin layer 8 in the gap between the step S3 of sealing with the sealing chucks 60 and 61 and the tube material 7 sealed with the sealing chuck and the synthetic resin tube wall 2 with spiral wave. And step S4 of injecting.

  For forming the tube wall 2 in the step S1, the same method as the conventional method for forming a synthetic resin tube with a spiral wave can be used. As shown in FIG. After being deformed into an M-shape in cross-sectional view, this is sent out in a spiral shape, and the outer winding tape (outer surface layer 24) is continuously fed out from the base 81 in the same spiral shape on the outer surface side, and is attached, The inner wall tape (main body portion 20) is also continuously spirally fed out from the base 82 and attached to the inner surface side, and the tube wall 2 is formed by joining and integrating in the axial direction. In this embodiment, the tube material 7 is not formed at the end portion after the one-end tube wall 2 is completed, but the tube material 7 of the step S2 is formed on the formed tube wall 2 continuously with the step S1. The receiving part 4 is efficiently formed.

  The tube material 7 to be formed in the step S2 is transformed into the M-shaped cross-sectional view of the steel material 22 continuously supplied by the processing roller 93 in the same manner as the formation of the tube wall 2 and then sent out in a spiral shape. Outer winding tape (outer surface layer 24) is continuously fed out in a spiral form from the base 83 and attached to the outer surface side, the inner winding tape is omitted, and the tube material 7 is formed by joining and integrating in the axial direction. . The molded tube material 7 is supported from the outside in the radial direction by a plurality of guide rollers 91 as guide portions, and is supported coaxially with the tube wall 2.

  In step S3, the outside of the tube wall 2 is surrounded by a cylindrical outer frame (divided in two).

  A reinforcing fiber is attached in an annular shape to the inner wall of the body portion of the outer frame (corresponding to one end of the tube wall 2).

  Sealing chucks 60 and 61 are attached to both ends of the tube material 7 with respect to the tube material 7 formed coaxially, and the space between the outer surface of the tube wall 2 and the inner surface of the outer frame is sealed. Although not shown, a sealed space is formed by setting the inner frame that forms the receiving surface 40 of the receiving portion 4 on the inner peripheral surface side of the tube member 7 that projects outward from the tube wall 2. .

  In step S4, a synthetic resin material for forming the synthetic resin layer 8 is injected into the sealed space. In this embodiment, the injection is performed through the injection port 62 communicating with the sealing chuck 60 in the axial direction. However, the injection method is not limited at all, and the sealing chuck 61 or the gold for forming the receiving surface 40 is formed. An inlet may be provided in the mold.

  When the injected synthetic resin material is foamed, it moves while filling the space, and the synthetic resin material that has reached the inner surface of the outer frame enters the reinforcing fiber attached to the inner wall of the outer frame. While impregnating, the density is increased by the foaming pressure, and an FRP layer as a skin layer is formed.

6). Evaluation of Drop Resistance of Synthetic Resin Tube with Spiral Wave The strength of the synthetic resin tube with spiral wave of the present invention was evaluated by performing a drop test under the following conditions equivalent to the unloading work on site. A synthetic resin pipe with a spiral wave with a joint that does not have an FRP layer was also evaluated by a drop test as a comparative example.

(a) Specimen A synthetic resin tube with a spiral wave with a φ1000 mm joint, length L: 1350 mm, and a reinforcing convex part constituting a helical wave is provided with a steel plate having a convex cross section for reinforcement.
(b) Receptacle part Formed in a cylindrical shape with foamed resin with a part of the outer peripheral surface of the synthetic resin pipe part with spiral wave as a reinforcing material exposed, and an FRP layer on the connection side end of the outer peripheral face of the acceptor Form and cure for 3 days.
(c) Drop location 1. Asphalt pavement
2. Gravel pavement
(d) Drop height 3m (Drop angle of specimen: 45 ° oblique)
(e) Number of samples Asphalt test: 3 pieces, gravel test: 3 pieces.
(f) Comparative Example Three synthetic resin tubes with spiral waves with joints having the same configuration as the above configuration except that no FRP layer was provided were prepared for asphalt test and three for gravel test.

  When the drop resistance test was performed under the above conditions, the synthetic resin pipe with a spiral wave with a joint not provided with the FRP layer was dropped onto an asphalt pavement surface, gravel pavement as shown in FIG. Along with the fall on the surface, cracks due to the drop occurred on the outer periphery of the receiving port.

  In particular, as shown in the enlarged view of FIG. 17 (b), a defective portion D occurs in a portion that directly collides with an asphalt pavement surface or a gravel pavement surface, and a crack occurs along the edge of the tube material 7 so that the pipe material. The end of 7 was exposed. In the figure, E indicates the fracture surface.

  On the other hand, as for the synthetic resin pipe with a swivel with an opening according to the present invention, both the fall on the asphalt pavement surface and the fall on the gravel pavement surface, as shown in FIG. However, no cracks occurred on the outer peripheral surface of the receiving port.

  FIG. 18B is an enlarged view of the scratch F. Although the line 8b forming the edge of the outer peripheral surface of the receiving port was lost over the range 8c, there was no problem in strength.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and can of course be implemented in various forms without departing from the gist of the present invention.

1A, 1B, 1C Synthetic resin tube with spiral wave 2 Tube wall 2a Recess 3 Insert port 4 Receiving port 5 Synthetic resin layer 5a FRP layer 6 O-ring 7, 7A Tube material 7B Reinforcement fiber 7C Reinforcement fiber chip 8 Synthetic resin layer 8a FRP layer 9 Mounting screw 10, 11 End portion 20 Body portion 21 Reinforcement convex portion 22 Steel material 23 Recessed portion 24 Outer surface layer 40 Receiving surface 42 Stepped taper portion 50 Annular groove 60, 61 Sealing chuck 62 Inlet 70 Engagement protrusion 71 Tube wall 81, 82, 83 Base 91 Guide roller 92, 93 Processing roller 102a The other end S Connection structure

Claims (13)

Mouth part for connecting the screw旋波with synthetic resin tube with each other, the socket portion with helical wave with synthetic resin pipe provided in the pipe end portion of the helical wave with synthetic resin pipe main body,
The socket portion extends in a cylindrical shape toward the tube end with a helical wave synthetic resin pipe main body in the axial direction of the tube, it is molded by foaming resin,
The receiving portion has an inner peripheral surface that is substantially flat along the axial direction and includes a reinforcing material,
The reinforcing material is a synthetic resin pipe part with a spiral wave having a larger inner diameter than the outer diameter of the synthetic resin pipe body part with a spiral wave, or a circular pipe part, and the synthetic resin with a spiral wave in the foamable resin. The reinforcing material is embedded coaxially with the resin pipe body,
At least the outer peripheral surface of the connecting end portion of the upper Symbol mouth part, the mouth part with helical wave with synthetic resin tube, wherein the F RP layer are formed. The synthetic resin tube with a helical wave with a receiving part according to claim 1 , wherein an FRP layer is also formed on an end surface of the connection side end part in the receiving part . The part of the outer peripheral surface of the reinforcing material to be embedded in the foamed resin, according to claim 1 or 2 is exposed on a part of the outer peripheral surface of the connecting end portion of the mouth part receptacle Synthetic resin tube with spiral wave with part . The synthetic resin tube with a spiral wave with a receiving part according to any one of claims 1 to 3 , wherein reinforcing fiber chips are embedded in the foamable resin in a dispersed state. Reinforcing fibers contained in the FRP layer, receptacle according to fiberglass tape form, or chopped strand mat, or any one of plain weave glass cloth scan that consists claim 1-4 was formed into a sheet Synthetic resin tube with spiral wave with part . Spiral wave in the helical wave with synthetic resin pipe main body portion, and the steel plate of the convex sectional shape formed in a spiral shape, any one of claims 1-5 comprising a laminate of a synthetic resin for covering the steel A synthetic resin tube with a spiral wave with a receiving portion as described in 1. A helical wave with synthetic resin pipe main body, inserted port having reconnected mouth and is inserted into the receiving opening of the receiving portion with helical wave with synthetic resin tube according to any one of claims 1 to 6 A synthetic resin tube with a spiral wave with a part,
The insert mouth consists length substantially the same length as the upper Symbol mouth part is formed into a smooth outer peripheral surface engageable with the receptacle portion,
The smooth outer peripheral surface is formed by forming a strip-shaped resin layer having a convex cross section in a shape of filling the spiral groove in the spiral groove at the connection side end portion in the insertion opening. A synthetic resin tube with a spiral wave with an insertion port . The insertion opening provided with the synthetic resin pipe main-body part with a spiral wave, and the insertion opening part inserted in the opening part of the synthetic resin pipe with a helical wave of any one of Claims 1-6. A synthetic resin tube with a spiral wave with a part,
The insertion port has a length substantially the same as the length of the receiving port extending in the tube axis direction, and is formed on a smooth outer peripheral surface that can be engaged with the receiving port.
The spiral groove at the connection side end in the insertion port is filled with a foamable resin ,
A synthetic resin tube with a spiral wave with an insertion port, wherein a circular pipe component is embedded in the foamable resin coaxially with the synthetic resin tube main body with the spiral wave . The synthetic resin tube with a spiral wave with an insertion opening according to claim 8 , wherein reinforcing fiber chips are embedded in the foamable resin in a dispersed state . Said insert to at least the outer peripheral surface of the connecting end portion of the mouth portion, the mouth portion with helical wave with synthetic resin pipe inserted according to any one of claims 7-9 F RP layer are formed. The synthetic resin tube with a spiral wave with an insertion port according to claim 10 , wherein an FRP layer is also formed on an end surface of the connection side end in the insertion port . The synthetic resin tube with a helical wave with a receiving portion according to any one of claims 1 to 6 and the synthetic resin tube with a helical wave with an insertion portion according to any one of claims 7 to 11. Connection structure of synthetic resin pipe with spiral wave . The inserted sealing member for sealing a gap between the mouth portion and the socket portion, the connection of the helical wave with the synthetic resin tube according to claim 12 which is kicked set structure.