JPH0759385B2 - Method for manufacturing resin composite pipe with socket - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for producing a resin composite pipe with a socket.

(Prior Art) A pipe made of a thermoplastic resin such as a hard vinyl chloride resin has excellent corrosion resistance, but mechanical strength such as pressure resistance and impact resistance is not so high. Therefore, it is not sufficiently durable to be used in a severe environment, for example, as a piping material for a chemical plant in which a high temperature and high pressure chemical solution is transported or as a material for an underground buried pipeline that receives pressure from the outside. . Therefore, a resin composite pipe having improved mechanical strength while maintaining the excellent corrosion resistance of a thermoplastic resin has been proposed and is now widely used in various fields. This resin composite pipe is made by laminating various outer layer constituent materials such as fiber reinforced thermosetting resin on the outer peripheral surface of the thermoplastic resin pipe, and by doing so, the desired mechanical strength is obtained. ing.

Conventionally, for example, JP-A-57-207061 discloses the following two methods for producing such a resin composite pipe. First, the first method is to apply a surface treatment to the outer peripheral surface of the thermoplastic resin tube to enhance the adhesive effect with the fiber-reinforced thermosetting resin (hereinafter referred to as FRP), and then wind the FRP, Next, the resin concrete is wound on top of it, and finally the FRP is wound again. The second method is to insert the FRP-wound pipe into a mold with an FRP layer formed on the inner surface, and pour uncured resin concrete into the gap between the mold and the pipe to cure it. After unifying, the mold is removed.

By the way, in order to connect the resin composite pipes described above,
Similar to the case of other synthetic resin pipes, a receiving portion is provided at one end of the pipe, and a receiving and inserting connection in which the insertion portion of another pipe is inserted and connected is performed, but in this case, conventionally, The inner peripheral surface of the receiving portion and the outer peripheral surface of the insertion portion are bonded with an adhesive.

In addition, in order to perform the receiving and inserting connection described above, it is, of course, necessary to prepare a resin composite tube with a socket having a socket at least at one end, but as a method for manufacturing such a tube, Conventionally, for example, the method disclosed in Japanese Patent Laid-Open No. 54-146871 is known.

The manufacturing method is such that a molding material is laminated around a core mold that moves in the axial direction while rotating in the circumferential direction and a mouthpiece molding material mounted on the core mold, and then the molding material is passed through a curing furnace to form the molding material. It is hardened, then released from the core mold, cut the straight pipe part and the mouth part with a cutting blade, and finally removes the mouth part molding material. In the resin composite pipe with a socket, the straight pipe part and the socket part are each formed of a molding material layer having a predetermined thickness.

(Problems to be Solved by the Invention) However, the method of manufacturing a resin composite pipe described in JP-A-57-207061 has the following problems.

That is, in the case of the first method of manufacturing the same, the outer layer constituent material a such as FRP is spirally wound at a constant pitch as shown in FIG.
At both ends of the outer layer constituent material a, which are the start and end of winding, the outer layer constituent material a is wound several times along the tube end, so-called extra winding is performed. This extra winding must always be performed so that the outer layer constituent material a is not wrapped around the chucking devices b, b indicating the tube, and the end of the tube is finished well. For this reason, a difference in the laminated thickness of the outer layer constituent material a is inevitable between the both ends of the tube and the other portions, and it is impossible to obtain a resin composite tube having a uniform outer layer constituent material layer over the entire length of the tube. was there. Further, since the winding pitch of the outer layer constituent material a is not uniform throughout, there is a problem that the appearance is deteriorated. Further, the outer layer constituent material is wound around each of the thermoplastic resin tubes,
Since this is a so-called batch process, there was a problem that the work efficiency was poor and the productivity was poor.

In the case of the second method disclosed in JP-A-57-207061, the FRP-wound pipe is fitted into the mold having the FRP layer formed on the inner surface, and the gap between the mold and the pipe is inserted. Since resin concrete is poured into and hardened, such a method inevitably requires batch processing. Therefore, this method also has a problem that work efficiency is poor and productivity is poor. In addition, a mold is prepared separately and the FRP is
Since it is necessary to form the layer in advance, there is a problem that the process becomes complicated. Further, the furnace for hardening the resin concrete needs to be adapted to the longest pipe, which causes a large scale of equipment and is economically disadvantageous.

Further, in any of the above methods, the resin composite pipe to be produced, since the pipe ends of the thermoplastic resin pipe are exposed to the outside at both ends thereof, especially when both ends of the pipe are impacted, There is a problem that the outer layer constituent material layer is easily peeled off from there. Therefore, it is necessary to pay special attention during transportation and piping, which is inconvenient to handle.

Further, in the receiving and inserting connection in the above-mentioned conventional resin composite pipe, the receiving part is often a multi-layered structure of the core material and the outer layer constituent material layer, like the straight pipe part, and the receiving part and the connecting part are inserted. The adhesion to the mouth portion is the adhesion between the inner peripheral surface of the core material and the outer layer constituent material layer.
If the core material is a thermoplastic resin and the outer layer constituent material is a thermosetting resin, it becomes very difficult to bond the two. Therefore, there are problems that the connection strength is low and the watertightness is poor.

On the other hand, the manufacturing method disclosed in Japanese Patent Laid-Open No. 54-146871 has the following problems.

In other words, there has been a problem in that the length of the tube varies because no measures have been taken to determine the mounting position of the mouthpiece molding material.

Further, when attempting continuous production, it is necessary to mount the mouthpiece molding material at a predetermined position of the core mold in synchronization with the movement of the core mold that advances in the axial direction while rotating in the circumferential direction. Such a thing is practically impossible. Therefore, there is a problem that the resin composite pipe with a socket cannot be continuously produced.

Furthermore, since it is a method exclusively for the purpose of producing a resin composite pipe with a mouthpiece in which the straight pipe portion and the mouthpiece portion are each formed of a molding material layer having a predetermined thickness, for example, a synthetic resin such as a thermoplastic resin pipe is used. It was not possible at all to manufacture a resin composite pipe using the pipe as a core material.

The present invention has been made to solve the problems of the above-described conventional technology, and a resin composite pipe suitable for forming a receiving and connecting structure in a resin composite pipe having excellent connection strength and watertightness. It is intended to provide a manufacturing method.

Further, the present invention is intended to provide a method capable of efficiently and continuously producing a resin composite pipe with a socket in which the thickness of the outer layer constituent material layer such as FRP is uniform over the entire length of the pipe.

(Means for Solving the Problems) In order to achieve the above object, the method for producing a resin composite pipe with a mouthpiece according to the present invention according to the present invention is performed by rotating a synthetic resin pipe of a fixed length around its pipe axis. The synthetic resin pipe can be moved forward along the pipe axis, the rotational motion and the forward motion of the synthetic resin pipe can be transmitted, and the composite is formed via a socket molding connecting member having a socket molding portion in the axial center part. It is possible to connect a synthetic resin pipe of the same size as the pipe to the rear end of the resin pipe, and then to transmit the rotational movement and forward movement of the pipe to the rear end of the connected synthetic resin pipe. A synthetic resin pipe of the same size as the pipe is connected via the spout molding connecting member or again via the socket molding connecting member, and similarly, between the synthetic resin pipes of the same size. By interposing the connection member for socket molding and the connection member for insertion molding alternately, Or, a step of forming a core tube in which a plurality of synthetic resin pipes are connected and integrated by sequentially connecting the synthetic resin pipes by interposing only the socket forming connecting member, and rotating around the pipe axis. While forming a resin composite raw tube by winding and laminating an outer layer constituent material on the outer peripheral surface of the core tube advancing along the tube axis, and after curing the outer layer constituent material, the resin composite raw tube is And a step of sequentially cutting each synthetic resin pipe at a connecting portion to separate the synthetic resin pipe into a regular-sized resin composite pipe.

Furthermore, the method for producing a resin composite pipe with a socket according to the present invention,
In the step of forming the core tube, a socket molding connecting member and an insertion molding connecting member provided with a minute stopper for contacting with the tube end surface of the synthetic resin tube and securing a gap immediately before the outer tube end surface. In addition to the above, in the step of forming the resin composite raw pipe, the outer layer constituent material may be introduced into the gap and the tube end surface of each synthetic resin pipe may be covered with the outer layer constituent material. Is suitable for manufacturing a resin composite pipe with a socket suitable for the above-mentioned connection structure.

(Operation) In the method for producing a resin composite pipe with a socket according to the present invention,
A plurality of standard length synthetic resin pipes are connected by alternately using the mouthpiece forming connecting member and the mouthpiece forming connecting member, or by using only the mouthpiece forming connecting member to form a core tube. Along with this, the core tube is advanced while rotating around the tube axis, and an outer layer constituent material such as FRP is spirally wound around it at a constant pitch, and the outer layer constituent material is cured to form a resin composite raw tube. After that, this raw pipe is cut at the connecting portion of the synthetic resin pipe. The resin composite pipe with a socket thus obtained is
The length is always constant, the winding pitch of the outer layer constituent material is constant over the entire length of the tube, that is, the thickness of the outer layer constituent material layer is uniform, and the finish of the tube end is also clean. At the same time, each process becomes continuous, and the productivity is greatly improved as compared with the conventional method in which batch processing is unavoidable.

Further, as each of the above-mentioned connecting members, a socket forming connecting member and an insert forming connecting member provided with a minute stopper for contacting with the pipe end surface of the synthetic resin pipe and securing a gap immediately in front of the pipe end surface. In the step of forming the resin composite raw pipe, the outer layer constituent material is introduced also into the gap, and the pipe end surface of each synthetic resin pipe is covered with the outer layer constituent material, so that the outer layer constituent material is provided over the entire length of the pipe. It is possible to obtain a resin composite pipe with a socket having a uniform thickness, in which both end faces of the synthetic resin pipe are covered with the outer layer constituent material.

(Example) Hereinafter, the Example of this invention is described with reference to drawings.

FIG. 1 is a partial cross-sectional view showing a receiving and inserting connection structure in a resin composite pipe to be manufactured by the manufacturing method according to the present invention.

In this connection structure, the insertion port 8 of the resin composite pipe F1 is inserted into the reception port 9 of the resin composite pipe F2 with a socket,
The outer layer constituent materials 20, 20 that respectively cover the tube end faces 81, 91 of the F1 and F2 core materials C, C collide with each other, and the outer layer constituent materials 20, 20 mutually, and the receiving portion 9 The inner peripheral surface and the outer peripheral surface of the insertion portion 8 are fixed by an adhesive.

In addition, it is preferable to further cover the outer peripheral surface of this connection portion with FRP (shown by a broken line in the figure) because the connection becomes stronger.

The resin composite tube F2 with a socket has an outer layer constituent material layer 20 formed on the outer peripheral surface of a synthetic resin tube C serving as a core material and has a socket part 9 at least at one end. In the resin composite tube F2 with a socket, the socket 9 is formed of the outer layer constituent material 20, and the tube end surface 91 of the core material C facing the socket 9 is covered with the outer layer constituent material 20. Has been done.

On the other hand, the resin composite pipe F1 is such that the outer layer constituent material layer 20 is formed on the outer peripheral surface of the synthetic resin pipe C serving as the core material, and the insertion port 8 is provided at at least one end. In the resin composite pipe F2, the pipe end surface 81 of the core material C in the insertion opening 8 is covered with the outer layer constituent material 20. In addition, resin composite pipe F2
Is usually a resin composite pipe with a socket having a socket at the other end (not shown).

The synthetic resin pipe C may be a thermoplastic resin pipe such as vinyl chloride, and the outer layer constituent material 20 may be a fiber reinforced thermosetting resin (FRP).

In the receiving and inserting connection structure of the resin composite pipe as described above, the bonding area between the receiving portion and the insertion portion is the core of each resin composite pipe from the inner peripheral surface of the receiving portion and the outer peripheral surface of the insertion portion. It extends to the outer layer constituent material surface that covers the pipe end surface of the material,
Moreover, since the outer layer constituent materials are adhered to each other, high connection strength and water tightness can be obtained at the same time.

Next, an embodiment of a method of manufacturing a resin composite pipe with a socket according to claim 1 of the present invention will be described with reference to FIGS. 2 to 16.

First, the manufacturing apparatus will be described, and then the manufacturing method will be described together with the operation of the apparatus.

FIG. 2 is a schematic view showing the structure of a method for manufacturing a resin composite pipe with a socket and a manufacturing apparatus used therefor according to the present invention.

The manufacturing apparatus comprises a core pipe manufacturing means 1, a raw pipe manufacturing means 2, a raw pipe collecting means 3, and a cutting means 4, and a synthetic resin pipe manufacturing apparatus 5 is provided in the preceding stage of the manufacturing apparatus. is set up. Here, the synthetic resin pipe manufacturing apparatus 5 will be described. The apparatus 5 includes a pipe manufacturing machine 51 for continuously manufacturing a synthetic resin pipe B, and a synthetic resin pipe manufactured by the pipe manufacturing machine 51. The automatic cutting machine 52 cuts the pipe B into a predetermined size to form a synthetic resin pipe C of a fixed length. The pipe manufacturing machine 51 spirally winds a synthetic resin strip A having engagement portions (not shown) formed on both side edges into a tubular shape, and forms adjacent engagement portions with each other. The synthetic resin pipe B is manufactured by engaging with each other. Other than this, the pipe making machine 51 may be, for example, a so-called extruder that extrudes a molten resin to produce the synthetic resin pipe B.

Now, the core pipe manufacturing means 1 located at the first stage of the manufacturing apparatus of the present invention is connected to the synthetic resin pipe manufacturing apparatus 5 having the above-mentioned configuration via the pipe guide rail 61. This core tube manufacturing means 1
Is a synthetic resin pipe C which is guided from the synthetic resin pipe manufacturing apparatus 5 into the pipe guide rail 61 and is fed into the core pipe D by successively connecting and integrating the synthetic resin pipes C. Is sent to the next-stage raw pipe making means 2. The core tube producing means 1 having such a function receives a fixed length synthetic resin tube C, and a pedestal 11 that rotatably supports the tube C around its tube axis and a pedestal 11 supported on the pedestal 11. An extruding device 12 for extruding the synthetic resin pipe C in one direction along the pipe axis of the pipe C (in the case of this example, the right direction in FIG. 1) without hindering the rotational movement around the pipe axis, and the extrusion device 12. The synthetic resin pipe C extruded by the device 12 is sent out in the extrusion direction while being rotated around the pipe axis, and the sending device 13.
A plurality of members for interposing the rear end portion of the synthetic resin pipe C sent out by 13 and the front end portion of the next synthetic resin pipe C, connecting and integrating both of them, and forming the receiving portion 9. And a plurality of insertion molding connection members 15 for connecting and integrating the former synthetic resin pipes C and molding the insertion opening 8. When the resin composite pipe with a mouthpiece having the mouthpiece portions 9 at both ends is manufactured, the spout molding connecting member 15 is not used. In FIG. 2, reference numeral 63 indicates a workbench for inserting the connecting members 14 and 15 into the synthetic resin pipe C.

The gantry 11 and the pushing device 12 are configured as shown in FIGS. 3 and 4. Here, FIG. 3 is a partially omitted front view, and FIG. 4 is a right side view of the same.

First, the pedestal 11 will be described. The pedestal 11 receives, on a horizontal machine frame 111, eight support rollers 112, which receive the lower peripheral surface of the synthetic resin pipe C, and the lowermost surface of the synthetic resin pipe C. Three guide rollers 113 ... Are provided, and are installed in the vicinity of the end of the pipe guide rail 61. The eight support rollers 112 are horizontally arranged in two rows, and the support rollers 112, 112 in each row are arranged so that their axes are on the same straight line, and are arranged at predetermined intervals. Has been done. The interval between the rows is set smaller than the outer diameter of the synthetic resin pipe C. On the other hand, the three guide rollers 113
Are arranged so as to be orthogonal to the axis of the support rollers 112, respectively, and are separated by a predetermined distance between the rows of the support rollers 112.
They are arranged in rows. Also, these guide rollers 113 ...
Are provided at positions slightly lower than the support rollers 112. Each of the guide rollers 113 ... Can be laid down in the traveling direction of the synthetic resin pipe C (rightward in FIG. 1) as shown by the broken line in FIG.

The numbers of the support rollers 112 and the guide rollers 113, the installation intervals, and the like are not limited to the above examples, but may be appropriately determined according to the length, outer diameter, weight, etc. of the synthetic resin pipe C.

The pushing device 12 is installed on the rear end side of the gantry 11 described above. The pushing device 12 includes a horizontal machine frame 120, a dolly 121 slidably provided on the machine frame 120, and the dolly.
Extruder horizontally provided on 121 via supports 124, 124
125 and a cylinder 128 for moving the bogie 121 forward and backward. The dolly 121 is provided with guide wheels 122, and is guided by a guide rail 123 mounted on the machine frame 120 so as to be able to move forward and backward in a direction along the traveling direction of the synthetic resin pipe C. Extruder 125 has shaft 1
26 and an extruding plate 127 fixed to the tip of the shaft 126. The extruded plate 127 is a disk having a diameter slightly larger than the outer diameter of the synthetic resin pipe C, and the shaft 12
The 6 is supported rotatably around the axis by supports 124, 124 having bearings, for example. Cylinder 128 is
It is operated by hydraulic pressure or air pressure, and is arranged behind the dolly 121 and is connected to the dolly 121 via a rod 129. Extruder 12 that looks like this
The axis of the shaft 126 of the push-out tool 125 is the frame 11 described above.
It is provided so as to coincide with the pipe axis of the upper synthetic resin pipe C.

The configuration of the extrusion device 12 is not limited to the above-mentioned example, and other configurations may be used as long as the synthetic resin pipe C can be extruded in one direction along the pipe axis without hindering its rotation. Good. For example, the synthetic resin pipe C is sandwiched or held via a plurality of rollers having an axis parallel to the pipe axis of the synthetic resin pipe C, and in that state, the synthetic resin pipe C is moved in the direction along the pipe axis. Things can be considered. In addition, the extrusion device 12,
The push-out plate 127 may be configured to be driven by a motor or the like and rotate in synchronization with the delivery device 13.

The delivery device 13 is located in front of the gantry 11, that is, on the opposite side of the extrusion device 12 and at a position where the synthetic resin pipe C extruded from the gantry 11 can be taken out along the pipe axis as it is. In addition, it is installed at a predetermined distance from the gantry 11. As shown in FIG. 5 and FIG. 6, the feeder 13 comprises a plurality of feeding rollers 131 ... Arranged on the same circumference so as to come into contact with the outer peripheral surface of the synthetic resin pipe C. Is. The delivery rollers 131, ... Have their axes inclined at a certain angle θ with respect to the delivery direction of the synthetic resin pipe C. Further, all or a part of the delivery rollers 131 ... Is connected to a drive source (not shown). Then, as the delivery rollers 131 ... Rotate in one direction (see arrow P in the figure), the synthetic resin pipe C is
It is sent out in one direction while being rotated around the tube axis (see arrows Q and R in the figure). The delivery speed of the synthetic resin pipe C can be easily adjusted by changing the inclination or rotation speed of the delivery rollers 131 ....

It should be noted that the gantry 11 described above may have the same configuration as the transmitter 13.

The mouthpiece connecting member 14 is a substantially cylindrical member formed of a synthetic resin material, and as shown in FIGS. 7 and 8,
While the mouthpiece molding portion 141 is formed in the central portion in the axial direction,
At both ends of the socket molding portion 14, a fitting portion 142 fitted at an end portion of one synthetic resin pipe C and a fitting portion 143 fitted at an end portion of the other synthetic resin pipe C are formed. . The socket molding portion 141 has a length that is twice as long as the socket portion 9 to be molded, and its outer diameter is equal to the inner diameter of the socket portion 9. In addition, a concave groove 144 is formed over the entire circumference in the central portion of the mouthpiece molding portion 141 thus configured. When the resin composite raw pipe E is cut and separated into a regular-sized resin composite pipe F with a socket in the final step, the cutting blade 41 comes into contact with the socket molding part 141, and the recessed groove 144 is formed in the socket molding part 141. This is to prevent the 141 from being damaged. Therefore, the width of the groove 144 needs to be thicker than the thickness of the cutting blade 41. Also, this groove 144
It is necessary that the depth of is so deep as to avoid contact with the cutting blade 41. The fitting portion 142,143
Is formed concentrically with the socket molding portion 141, and when the synthetic resin pipes C, C are respectively connected to the fitting portions 142, 143, both pipe axes are made to coincide with each other.
Further, it is preferable that the fitting portions 142 and 143 are gradually narrowed toward the respective tips. This is due to the variation in the inner diameter of the synthetic resin pipe C and the connection member for the mouthpiece molding.
14 By absorbing the dimensional error in molding itself, the fitting portion 142,
This is because the adhesion between 143 and the inner surface of the synthetic resin pipe C is enhanced. When the fitting portions 142 and 143 are respectively formed in this way, slippage does not occur between the synthetic resin pipe C and the fitting portions 142 and 143 in either the circumferential direction or the axial direction. It should be noted that the degree of contraction of the fitting portions 142, 143 depends on the fitting portions 142, 1
The length of 43 itself, the inner diameter of the synthetic resin pipe C, the magnitude of the frictional force with the synthetic resin pipe C, the molding accuracy of the mouthpiece molding connecting member 14 itself, and the like are appropriately determined according to various conditions.

Further, the fitting portions 142 and 143 are chamfered 145 and 146 at the outer peripheral edge portions of the tips, respectively. The chamfered portions 145 and 146 serve to position the synthetic resin pipe C and the mouthpiece forming coupling member 14 and to smoothly fit the fitting portions 142 and 143 into the synthetic resin pipe C. The inclination angle, width, etc. of the chamfered portions 145, 146 are appropriately determined according to various conditions, like the degree of narrowing of the fitting portions 142, 143.

On the other hand, the spout molding connecting member 15 is formed of a synthetic resin material and has a substantially cylindrical shape, and one end thereof is connected to the end portion of one synthetic resin pipe C as shown in FIGS. 9 and 10. The fitting portion 151 is fitted and the other end side is a fitting portion 152 which is fitted into the end portion of the other synthetic resin pipe C. These fitting portions 151, 152 are formed concentrically, and the fitting portions 151, 1
When the synthetic resin pipes C, C are connected to 52, respectively, both pipe axes are made to coincide with each other. In addition, the fitting portion 151,
Similarly to the mouthpiece-forming connecting member 14 described above, the 152 is gradually narrowed toward the tip thereof,
The outer peripheral edge of the tip is chamfered 153,154. Further, a brim portion 155 is formed over the entire circumference at the boundary portion between both fitting portions 151, 152 thus formed, that is, in the central portion in the longitudinal direction. This flange portion 155 prevents the cutting blade from coming into contact with the pipe end of the synthetic resin pipe C inside the raw pipe E when the resin composite raw pipe E is cut and separated into the regular length resin composite pipe F in the final step. In addition, a gap V (see FIG. 15) is formed between the synthetic resin pipes C. Therefore, the thickness of the brim portion 155 needs to be thicker than the thickness of the cutting blade. Further, the height of the collar portion 155 is such that the collar portion 155 does not protrude from the outer peripheral surface of the core tube D when the synthetic resin tubes C ... Are connected to form the core tube D. It is set to a size smaller than the wall thickness of. This is because, as shown in FIG. 16, when the collar portion 155 projects from the outer peripheral surface of the core tube D, when the outer layer constituent material 20 is wound around the core tube D, the outer layer is formed at the connecting portion of the synthetic resin tube C. This is because the constituent material 20 rises to cause winding disorder, and a cavity T is formed between the outer layer constituent material 20 and the core tube D, which causes defective products.

It should be noted that the socket molding connecting member 14 and the insertion molding connecting member 15
Is not limited to one in which the outer peripheral surfaces of the fitting portions 142, 143, 151, 152 are smooth. Taking the spout molding connecting member 15 as an example, as shown in FIGS. 11 and 12, for example, a fitting portion
A plurality of recessed grooves 156 may be formed on the outer peripheral surfaces of the 151, 152 along the axis. In this case, the concave groove 156 has an arbitrary shape such as a V-shaped cross section, a U-shaped cross section, and a U-shaped cross section. In this way, when the recessed grooves 156 are formed on the outer peripheral surfaces of the fitting portions 151, 152, the frictional force in the direction around the axis between the fitting portions 151, 152 and the inner surface of the synthetic resin pipe C is greater than that of a smooth outer peripheral surface. This is convenient for molding because it is possible to increase the size and the molding accuracy of the fitting portions 151 and 152 does not need to be so high. Also in the insertion port connecting member 15, the outer peripheral edge portions of the distal ends of the fitting portions 151, 152 are chamfered 153, 154, and the fitting portions 151, 1 are also provided.
A collar portion 155 is formed at the boundary portion of 52.

Next, the raw pipe manufacturing means 2 will be described. This raw pipe making means 2 is placed at the next stage of the core pipe making means 1 described above, and the outer peripheral surface of the core pipe D sent out from the core pipe making means 1 while rotating around the pipe axis. Then, the outer layer constituent material 20 is wound and laminated to manufacture the resin composite original pipe E. The raw pipe manufacturing means 2 having such a function is composed of a surface treatment machine 21, an outer layer constituent material winding portion 22, and a curing furnace 26. Reference numeral 27 in the figure denotes a roller for supporting the core tube D.

The surface treating machine 21 is for subjecting the outer surface of the core tube D to, for example, a sanding treatment so that the adhesion between the core tube D and the outer layer constituent material 20 is enhanced. This surface treatment machine 21
It is located next to the delivery device 13 of the core tube producing means 1.
The surface treatment machine 21 does not necessarily have to be provided.

The outer layer constituent material winding section 22 is for winding the outer layer constituent material 20 such as FRP around the outer peripheral surface of the core tube D, and is the surface treatment machine described above.
It is provided after 21. This outer layer constituent material winding part 22
Is composed of a filler filling unit 24 and an FRP winding unit 25. The filling material filling unit 24 includes a filling material 241
And a guide roller for winding the non-woven fabric 243 covering the filling material 241 on the outer peripheral surface of the core tube D.
244 and a pressing roller 245 for pressing the wound non-woven fabric 243. In addition, the FRP winding unit 25
Is an impregnation tank 252 for impregnating a band-shaped glass fiber 251 with a thermosetting resin, and a guide for winding the glass fiber (FRP) 253 impregnated with the thermosetting resin around a core tube D. A roller 254 and a pressing roller 255 for pressing the FRP 253 wound around the core tube D are respectively provided. Further, both the non-woven fabric 243 and the FRP 253 are supplied at a constant angle with respect to the tube axis of the core tube D so that they are spirally wound around the outer peripheral surface of the core tube D at a constant winding pitch. This angle is appropriately determined according to various conditions such as the outer diameter of the core tube D, the rotation speed and the transfer speed of the core tube D, and the like. Also, the core tube D
Is a non-woven fabric 243 and FRP25
3 is automatically wound around the core tube D. Therefore, each of the guide rollers 244 and 254 described above is usually fixed at one place.

The configuration of the outer layer constituent material winding portion 22 is not limited to the above-described one, and can be appropriately changed depending on the number of layers formed on the outer peripheral surface of the core tube D, the type of the outer layer constituent material, and the like. . In the above example, the glass fiber 251 is impregnated with the thermosetting resin before being wound.
It is also possible to wind only the core 251 around the core tube D and then impregnate it with a thermosetting resin by coating or the like.

The curing furnace 26 is for curing the outer layer constituting material 20 such as the filler 24 which is wound and laminated in the outer layer constituting material winding portion 22 described above, and is arranged in the subsequent stage of the FRP winding unit 25. . The curing furnace 26 is configured, for example, in a tubular shape so that the core tube D wound with the outer layer constituent material 20 can be covered from the surroundings.

Next, the raw pipe collecting means 3 will be described. This raw pipe taking-in means 3 is installed at the next stage of the above-mentioned raw pipe making means 2 and prevents the resin composite raw pipe E coming out of the raw pipe making means 2 from rotating. Instead, it is for picking up along the traveling direction of the raw tube E. The raw pipe taking-out means 3 having such a function has the same structure as the sending machine 13 of the core tube making means 1 described above, and its operation is the sending machine.
It is in sync with 13, or slightly slower.

The cutting means 4 is arranged next to the raw pipe collecting means 3. The cutting means 4 cuts the resin composite raw pipe E, which has been taken by the raw pipe taking means 3, at the connecting portion of the synthetic resin pipes C ... And separates it into the resin composite pipe F ... . The cutting means 4 having such a function is provided with a cutting blade 41 for cutting only the outer layer constituent material layer of the resin composite raw pipe E, and has a certain period in a certain region along the pipe axial direction of the resin composite raw pipe E. It is provided so that it can reciprocate. The cutting means 4 is an appropriate control device (not shown).
When the connecting portion of the synthetic resin pipe C, which is a cutting point, is located at the position of the cutting blade 41, the movement starts in the same direction as the moving direction of the raw pipe E, and at the same speed as the moving speed of the raw pipe E. The original pipe E is cut while moving, and immediately after cutting, it returns to the initial position.

Reference numeral 62 in the figure denotes a pipe transfer rail for receiving the fixed-sized resin composite pipe with a socket F ... Cut and separated by the cutting means 4 and transferring it to a predetermined position.

Next, a method of manufacturing the resin composite pipe according to the present invention will be described together with the operation of the manufacturing apparatus described above.

First, the synthetic resin pipe B is continuously made by the pipe making machine 51 of the synthetic resin pipe making apparatus 5, and the synthetic resin pipe B is successively cut by the automatic cutting machine 52 to a predetermined size. One end (right end in the figure) of the standard-sized synthetic resin pipe C formed in this way is provided with the socket molding connecting member 14 and the insertion molding connecting member 15 in one synthetic resin pipe C. Are successively inserted into the socket forming connecting member 14 and the synthetic resin pipe C next to the opening forming connecting member 15 alternately. This work is performed on the workbench 63.
In this way, the synthetic resin pipe C in which the socket forming connecting member 14 or the insert forming connecting member 15 is attached to one end is guided by the pipe guide rail 61 to sequentially mount the core pipe manufacturing means 1. Sent on 11.

When the synthetic resin pipe C is fed onto the gantry 11, the cylinder 128 of the extrusion device 12 operates and the rod 129 is extended.
Along with this, the dolly 121 moves forward toward the gantry 11, and the pushing plate 127 of the pushing tool 125 contacts the rear end of the synthetic resin pipe C on the gantry 11. Further, when the rod 129 extends and the carriage 121 continues to move forward, the synthetic resin pipe C is pushed by the pushing plate 127 and moves forward on the gantry 11. At this time, the synthetic resin pipe C rubs against the support rollers 112, but since the pipe C is also supported by the guide rollers 113, it moves forward smoothly.

In this way, the synthetic resin pipe C is extruded from the gantry 11 toward the sending machine 13. At this point, the sending machine 13 has already started, and eventually the sending machine 13 has a front end portion of the synthetic resin pipe C (in this embodiment, the socket forming connecting member 14 or the insertion forming connecting member 15). Reach the outer peripheral surface of the front end
When the 13 delivery rollers 131 ... Abut, the rotating delivery rollers 131 ... Start the rotation of the synthetic resin pipe C around the pipe axis. At the same time, the guide rollers 113 of the gantry 11 supporting the latter half of the synthetic resin pipe C fall down and separate from the synthetic resin pipe C, and the latter half of the synthetic resin pipe C is supported only by the supporting rollers 112. Will be done. As a result, the synthetic resin pipe C smoothly rotates around the pipe axis. Further, since the push-out plate 127 which is in contact with the rear end of the synthetic resin pipe C also rotates together with the synthetic resin pipe C, the rotational movement of the synthetic resin pipe C is not hindered at all. The guide rollers 113 of the gantry 11 may be laid down just before the synthetic resin pipe C starts to rotate.

When the synthetic resin pipe C is sent out by the sending machine 13 as described above, it is not necessary to continue pushing the synthetic resin pipe C from the rear side, and therefore the cylinder 128 of the extrusion device 12 is not required.
The rod 129 is retracted, the carriage 121 is retracted accordingly, and the push-out plate 127 of the push-out tool 125 returns to the initial position. And
When the synthetic resin pipe C is completely separated from the base 11, the stopper (not shown) at the tip of the pipe guide rail 61 is released, and the next synthetic resin pipe C is fed onto the base 11.

Immediately after the next synthetic resin pipe C is fed onto the gantry 11 as described above, the cylinder 128 of the extrusion device 12 is immediately actuated again to push the synthetic resin pipe C on the gantry 11 forward. . Here, the extrusion speed of the synthetic resin pipe C by the extrusion device 12 is set to a speed slightly higher than the delivery speed of the synthetic resin pipe C by the delivery device 13, and the synthetic resin before being delivered by the delivery device 12 is set. The rear end of the pipe C is the pedestal 11 and the sending machine.
While moving to and from 13, the synthetic resin pipe C on the gantry 11
Is designed to catch up with the previous synthetic resin pipe C.

When the synthetic resin pipe C on the pedestal 11 is pushed out by the extrusion device 12, the other fitting portion 143 of the socket molding connecting member 14 inserted into the front end portion of the pipe C is guided to the chamfered portion 146. As described above, it is lightly fitted into the rear end portion of the synthetic resin pipe C going forward. Then, as the extrusion device 12 continues to push out the synthetic resin pipe C on the gantry 11, the fitting portion 142 of the mouthpiece forming coupling member 14 deeply penetrates into the previous synthetic resin pipe C, and the fitting portion 142. Then, the frictional force between the inner surface of the pipe C and the inner surface gradually increases. Along with this, the rotational movement of the previous synthetic resin pipe C is transmitted to the synthetic resin pipe C on the pedestal 11 via this socket molding connecting member 14, and the synthetic resin pipe C on the pedestal 11 also starts to rotate. . At the same time, the guide rollers 113 ... Of the pedestal 11 fall down and separate from the synthetic resin pipe C, as described above. Further, when the extrusion device 12 continues to push the synthetic resin pipe C that is rotating on the gantry 11, the mouthpiece forming coupling member 14
The fitting portion 142 of is completely fitted into the rear end portion of the front synthetic resin pipe C. As a result, the pipe axes of the two synthetic resin pipes C, C coincide with each other, and the pipe end of the preceding synthetic resin pipe C abuts on the end face of the mouth forming portion 141 of the mouth forming connecting member 14, The connection of the two synthetic resin pipes C, C is completed. After that, the extruding device 12 includes the pedestal 11 so that the fitting portions 142 and 143 of the mouthpiece forming coupling member 14 do not accidentally come off from the synthetic resin pipes C and C.
Continue pushing the upper synthetic resin tube C until its front end reaches the dispenser 13.

When the synthetic resin pipe C on the gantry 11 reaches the feeder 13, the extrusion device 12 returns the extrusion plate 127 to the original position. Then, when the synthetic resin pipe C separates from the pedestal 11, the stopper of the pipe guide rail 61 is released again, and this time the synthetic resin pipe C having the insertion port molding connecting member 15 inserted at the front end is mounted on the pedestal 11. Sent to the top. The process of connecting the spout molding connecting member 15 and the synthetic resin pipe C going forward is performed in the same manner as in the case of the socket molding connecting member 14 described above, and the synthetic resin pipes C ... The mouthpiece forming connecting members 14 and the mouthpiece forming connecting members 15 are alternately connected to each other, whereby the core tube D is continuously produced.

The core tube D produced by the core tube producing means 1 as described above is sent to the original pipe producing means 2. In the raw pipe manufacturing means 2, first, the surface treatment machine 21 applies a surface treatment such as a sanding treatment to the outer surface of the core tube D.

The core tube D is a socket molding portion of the socket molding connecting member 14 ...
Grooves 144 formed in 141 ... and a connection member 15 for forming the mouthpiece
Since there is a gap V formed at the connecting portion of the synthetic resin pipe C by the collar portion 155 of.
, And the gap V, before or after the surface treatment, as shown in FIG. 13 and FIG.
The surface of the core tube D may be smoothed by filling with. By doing so, it is possible to prevent the edge of the outer layer constituent material 20 from being caught in the concave groove 144 or the gap V and disturbing the winding when the outer layer constituent material 20 is wound later. Further, at the time of cutting in the final step, the cutting blade 41 is less likely to reach the mouthpiece forming connecting member 14 and the mouthpiece forming connecting member 15 due to the resistance of the upper machine filler 7.
The cutting blade 41 can also prevent 14, 15 from being damaged.

The surface-treated core tube D is sent to the outer layer constituent material winding section 20, where the outer layer constituent material layer is formed on the outer peripheral surface.
In this embodiment, as described above, the outer layer constituent material winding portion 22
Further, since the filler filling unit 24 and the FRP winding unit 25 are provided, the filler 241 is provided on the outer peripheral surface of the core tube D.
And two layers of FRP 253 are formed. The filler 241, the non-woven fabric 243 and the FRP 253 are spirally wound around the core tube D at a constant pitch all the time because the core tube D is constantly advancing while rotating at a constant speed. The outer layer constituent material layer having a constant thickness is continuously formed on the outer peripheral surface of the.

In this way, after the outer layer constituent material layer is formed, the core tube D advances while rotating in the curing furnace 26, during which the outer layer constituent material layer is cured to become the resin composite raw tube E.

The raw resin composite pipe E produced as described above is taken by the raw pipe take-up means 3 while being rotated, and sent to the next cutting means 4.

The cutting means 4 waits at the predetermined position for the resin composite raw pipe E sent from the raw pipe taking-out means 3, and at the same time when the connecting portion of the synthetic resin pipe C ... , Start moving in the same direction as the original pipe E is moving. Since the length of the synthetic resin pipe C and the traveling speed of the raw pipe E are constant, the timing of starting this movement can be easily determined based on those values. Then, the cutting means 4 cuts the raw pipe E at the connecting portion while moving at the same speed as the traveling speed of the resin composite raw pipe E. When the cutting is completed, the cutting means 4 returns to the original position and prepares for the next cutting. Here, the cutting means 4 cuts only the outer layer constituent material layer of the resin composite raw pipe E, and does not cut the socket forming connecting member 14 and the insert forming connecting member 15 inside the raw pipe E. The resin composite pipe F obtained by this cutting is the original pipe E.
It is in a state of being connected to the front end portion of the socket via the socket forming connecting member 14 or the insertion forming connecting member 15. Therefore, each time the cutting is completed, the resin composite pipe F is pulled to be separated from the resin composite raw pipe E, and at the same time, the socket molding connecting member 14 left at the tip of the raw pipe E or the rear end of the resin composite pipe F. Alternatively, the insertion molding connecting member 15 is removed. The separated resin composite pipe F is carried to a predetermined place by the pipe transfer rail 62, and the removed socket forming connecting member 14 and the insert forming connecting member 15 are
Return to the beginning and use again.

As described above, the resin composite pipe with a socket having a uniform length in which the thickness of the outer layer constituent material layer is uniform over the entire length is continuously manufactured.

Incidentally, in the above-mentioned embodiment, since the mouthpiece molding connecting member 14 and the mouthpiece molding connecting member 15 are alternately used, the produced resin composite pipe with a mouthpiece has a mouthpiece portion at one end. However, in the case of manufacturing a resin composite pipe with a socket having sockets at both ends, it is only necessary to use the socket-forming connecting member 14 and not the socket-forming connecting member 15 at all.

FIG. 14 is a cross-sectional view showing the connection state of the resin composite pipes with sockets manufactured by the above method, which shows the socket 9 and the socket 8.
Are connected to each other by bonding the outer layer constituent material layers 20 to each other.

Next, an embodiment of a method for manufacturing a resin composite pipe with a socket according to claim 2 of the present invention will be described.

Since this manufacturing method is different from the manufacturing method according to the above-mentioned claim 2 only in the socket forming connecting member and the spout forming connecting member used, a detailed description will be given centering on the difference, The other points are omitted. Further, the same components as those shown in the above embodiment are designated by the same reference numerals.

First, the structure of the mouthpiece forming coupling member 16 will be described.

This socket molding connecting member 16 is provided with minute stoppers 167, 168, ... For contacting with the pipe end surface of the synthetic resin pipe C and securing a gap S immediately before the pipe end surface. The structure is the same as that of the socket-forming connecting member 14 described in the above embodiment. That is, as shown in FIGS. 17 and 18, a synthetic resin material is molded into a substantially cylindrical shape, and a mouth forming portion 161 is formed in the central portion in the axial direction, and both end portions of the mouth forming portion 161 are formed. , A fitting portion 16 fitted into the end portion of one synthetic resin pipe C
2 and a fitting portion 163 fitted into the end portion of the other synthetic resin pipe C.
And are formed respectively. In addition, the socket molding section 16
A concave groove 164 is formed in the central portion of 1 over the entire circumference. The minute stoppers 167, 168, ... Are provided on the peripheral surface of the base end portions of the fitting portions 162, 163. These minute stoppers 167, 168, ... secure a gap S, S having a length along the axial direction between the pipe end face of the synthetic resin pipe C and each end face of the mouth forming part 161. The dimension that can be achieved, in other words, the dimension corresponding to the thickness of the outer layer constituent material that coats the tube end surface of the synthetic resin tube C is set. Further, the height thereof sufficiently prevents the pipe end surface of the synthetic resin pipe C from contacting each end face of the socket molding portion 161, and the pipe end face of the synthetic resin pipe C is covered with the outer layer constituent material 20. The height is not too high to prevent The minute stoppers 167, 168, ... As described above are provided at a plurality of locations (four locations in the illustrated example) at equal intervals, but if the above-mentioned gaps S, S can be sufficiently secured, one location is provided. But it is okay. Note that the smaller the number provided, the less the possibility that the pipe end surface of the synthetic resin pipe C is covered with the outer layer constituent material 20.

Next, the spout molding connection member 17 will be described.

This spout molding connecting member 17 does not have the above-mentioned collar portion 155, but instead has a groove 175 formed over the entire circumference at the boundary portion between both fitting portions 171, 172, and the pipe end surface of the synthetic resin pipe C. With the same configuration as the insertion molding connecting member 15 described in the above embodiment, except that minute stoppers 176, 177, and 177 for contacting and securing the gap W immediately before the pipe end surface are provided. is there. That is, as shown in FIGS. 20 and 21, a synthetic resin material is molded into a substantially cylindrical shape, one end side of which is a fitting portion 171 which is fitted into the end portion of one synthetic resin pipe C, and the other end side of which is the other. The fitting portion 172 is fitted into the end portion of the synthetic resin pipe C, and the concave groove 175 is formed over the entire circumference in the boundary portion between the fitting portions 171 and 172. This groove 175 is used for the resin composite original pipe E in the final step.
When cutting and separating the resin composite tube F
This is for avoiding the contact of 41 so that the connecting member 17 itself is not damaged. Therefore, the width of the groove 175 needs to be larger than the thickness of the cutting blade 41. Further, the depth of the concave groove 175 needs to be a depth that can avoid the contact of the cutting blade 41.

Next, a manufacturing method using the socket forming connecting member 16 and the mouthpiece forming connecting member 17 described above will be described.

First, the synthetic resin pipe B is continuously manufactured by the manufacturing machine 51 of the synthetic resin pipe manufacturing apparatus 5, and the synthetic resin pipe B is sequentially cut by the automatic cutting machine 52 to a predetermined size. One end (the right end in the figure) of the standard-sized synthetic resin pipe C thus formed is provided with the socket molding connection member 16 and the insertion molding connection member 17 in one synthetic resin pipe C. Are sequentially and alternately inserted into the socket forming connecting member 16 and the next synthetic resin pipe C such as the insert forming connecting member 17. In this way, the synthetic resin pipe C having the mouthpiece forming connecting member 16 or the mouthpiece forming connecting member 17 inserted into one end thereof is guided by the pipe guide rail 61 to sequentially mount the core pipe forming means 1. Sent on 11.

When the synthetic resin pipe C is fed onto the gantry 11, the extrusion device 12 pushes the synthetic resin pipe C toward the delivery device 13 as in the above-described embodiment. At the front end of the synthetic resin pipe C, a socket molding connecting member 17 is inserted.

The synthetic resin pipe C extruded from the gantry 11 by the extrusion device 12 is sent out forward while being rotated around the pipe axis by the delivery device 13. When the synthetic resin pipe C is sent out by the sending machine 13, it is no longer necessary to continue pushing the synthetic resin pipe C from the rear, and therefore the pushing tool of the pushing device 12 is used.
125 returns to the initial position. Then, the synthetic resin pipe C
When is completely separated from the gantry 11, the stopper at the tip of the pipe guide rail 61 is released, and this time the synthetic resin pipe C having the insertion molding connecting member 17 inserted at the front end is placed on the gantry 11. Sent in. Then, the extrusion device 12 pushes out the synthetic resin pipe C on the gantry 11, and the insertion molding connecting member 17 attached to the tip of the pushing device 12 is attached to the rear end of the synthetic resin pipe C fed by the feeder 13. Insert and connect the synthetic resin pipes C, C to each other.

Hereinafter, similarly, the synthetic resin pipe C in which the socket molding connection member 16 is inserted in the front end portion and the synthetic resin pipe C in which the insertion opening molding connection member 17 is inserted in the front end portion are alternately alternated. The core tube D is continuously manufactured by this.

The core tube D is a socket molding portion of the socket molding connecting member 16 ...
Grooves 164 formed in 161 ... and a connection member 17 for molding an insertion opening
Since they have the concave grooves 175, ..., These concave grooves 164, 175
Before or after the surface treatment, the core tube D is filled with an appropriate filler 7 as shown in FIGS. 19 and 22.
It is better to make the surface of the surface smooth. By doing so, it is possible to prevent the edges of the outer layer constituting material 20 from being caught in the concave grooves 164, 175 and winding disorder when the outer layer constituting material 20 is wound later. Further, at the time of cutting in the final step, the cutting blade 41 receives the resistance of the filler 7 and receives the connection member 16 for socket molding and the connection member 17 for insertion molding.
The cutting blade 41 can prevent the connecting members 14 and 15 from being damaged.

The core tube D produced by the core tube producing means 1 as described above is sent out to the original pipe producing means 2, and the outer layer constituent material layer is formed on the outer peripheral surface thereof in the same manner as in the above-mentioned embodiment to form the resin composite. Original tube E Here, the outer layer constituent material 20 is the connecting member 1
The fine stoppers 167, 168, 176, 177 of 6, 17 also enter the gaps S, W secured just before the end face of the synthetic resin pipe C. As a result, the tube end surface of the synthetic resin tube C ... Is covered with the outer layer constituent material 20.

The resin composite raw pipe E coming out of the raw pipe making means 2 is taken by the raw pipe taking means 3 while being rotated, and sent to the next cutting means 4.

The cutting means 4 waits at the predetermined position for the resin composite raw pipe E sent from the raw pipe taking-out means 3, and at the same time when the connecting portion of the synthetic resin pipe C ... , Start moving in the same direction as the original pipe E is moving. Then, the cutting means 4 cuts the raw pipe E at the connecting portion while moving at the same speed as the traveling speed of the resin composite raw pipe E. When the cutting is completed, the cutting means 4 returns to the original position and prepares for the next cutting. Here, the cutting means 4 is
Only the outer layer constituent material layer of the resin composite raw pipe E is cut to obtain the raw pipe E.
Internal socket forming connecting member 16 and insert forming connecting member 17
Since it is not cut up to this point, the resin composite pipe F obtained by this cutting is in a state of being connected to the front end portion of the raw pipe E via the socket forming connecting member 16 or the insert forming connecting member 17. Therefore, each time the cutting is completed, the resin composite pipe F
Is pulled to separate it from the resin composite original pipe E, and the socket molding connecting member 16 or the insertion molding connecting member 17 remaining at the tip of the original pipe E or the rear end of the resin composite pipe F is removed.
The separated resin composite pipe F is carried to a predetermined place by the pipe transfer rail 62, and the removed socket forming connecting member 16 and insert forming connecting member 17 are returned to the work table 63 and repeatedly used.

The resin composite pipe with a socket manufactured as described above is a pipe of a synthetic resin pipe C having a fixed length and a uniform thickness of the outer layer constituent material layer over the entire length and facing the inside of the socket portion 9. The end face 91 is covered with the outer layer constituent material 20, and the insertion port 8
The tube end surface 81 of the synthetic resin C in (1) is covered with the outer layer constituent material 20.

In the above-described embodiment, since the mouthpiece forming connecting member 16 and the mouthpiece forming connecting member 17 are alternately used, the produced resin composite pipe with a mouthpiece has a mouthpiece portion at one end. However, when manufacturing a resin composite pipe with a socket having sockets at both ends, it is sufficient to use only the socket-forming connecting member 16 without using the spout-forming connecting member 17.

In addition, in any of the above manufacturing methods, the mouthpiece-forming connecting members 14 and 16 and the mouthpiece-forming connecting members 15 and 17 are previously attached to the front end portion of the synthetic resin pipe C before the gantry 11. However, these connecting members 14 to 17 are fed between the gantry 11 and the sending machine 13, and by the pushing operation of the pushing device 12, the synthetic resin pipes C, C located in front and back are interposed. May be. further,
The work of inserting the connecting members 14 to 17 may be performed manually, but it is efficient to automate using an appropriate device.

(Effects of the Invention) According to the method for producing a resin composite pipe with a socket according to the present invention, FR
It is possible to efficiently and continuously manufacture a resin composite pipe with a socket in which the thickness of the outer layer constituent material layer such as P is uniform over the entire length of the pipe and which has a fixed length. Therefore, the productivity can be dramatically improved as compared with the conventional manufacturing method.

Furthermore, according to the manufacturing method of claim 3, the outer layer constituent material layer has a uniform length over the entire length, and the pipe end face of the synthetic resin pipe facing the receiving portion is the outer layer constituent material. It is possible to efficiently and continuously manufacture the resin composite pipe with a socket in which the pipe end surface of the synthetic resin in the opening is covered with the outer layer constituent material while being covered. And it can contribute to implementation of the above-mentioned connection structure.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a receiving and inserting connection structure to be manufactured by a method for manufacturing a resin composite pipe with a socket according to the present invention, and FIGS. 2 to 15 are receiving members according to claim 1 of the present invention. FIG. 2 shows an embodiment of a method for manufacturing a resin composite pipe with a mouth, FIG. 2 is a schematic view showing a manufacturing process and a manufacturing apparatus, FIG. 3 is a partially omitted front view showing an extrusion device and a pedestal of core tube manufacturing means, FIG. 4 is a right side view of the same, FIG. 5 is a schematic front view showing the structure of a feeder of core tube producing means, FIG. 6 is a left side view of the same, and FIG. 7 is an embodiment of a socket forming connecting member. 8 is a sectional view taken along the line I-I in FIG. 7, FIG. 9 is a perspective view showing an embodiment of a connecting member for insertion molding, and FIG. 10 is II-II in FIG. FIG. 11 is a perspective view showing another embodiment of the connection member for insertion molding, FIG. 12 is a sectional view taken along line III-III in FIG. 11, and FIG.
FIG. 14 is a cross-sectional view showing a connection part of a synthetic resin pipe in a resin composite raw pipe and a usage state of a socket forming connection member, and FIG. 14 shows a connection state of a resin composite pipe with a socket manufactured by the method of the present invention. A sectional view, FIG. 15 is a sectional view showing a connecting portion of a synthetic resin pipe in a resin composite original pipe and a usage state of a spout molding connecting member, and FIG. 16 is an explanation of an action of a collar portion of the spout molding connecting member. 17 to 22 show an embodiment of a method for producing a resin composite pipe with a socket according to claim 2 of the present invention, and FIG. 17 shows a socket molding connection having a minute stopper. FIG. 18 is a perspective view showing an embodiment of the member, and FIG. 18 is IV- in FIG.
IV line cross-sectional view, FIG. 19 is a cross-sectional view showing the connecting portion of the synthetic resin pipe in the resin composite raw pipe and the usage state of the socket molding connecting member, and FIG. 20 is the insertion molding connecting member having a minute stopper. Fig. 21 is a perspective view, Fig. 21 is a cross-sectional view taken along line V-V in Fig. 20, and Fig. 22 is a cross-sectional view showing a connecting portion of a synthetic resin pipe in a resin composite raw pipe and a usage state of a connecting member for insertion molding
FIG. 23 is a front view for explaining a conventional method for manufacturing a resin composite pipe. 1 ... Core tube making means 11 ... Stand, 12 ... Extrusion device 13 ... Feeder 14,16 ... Receptacle molding connecting member 141,161 ... Receptacle molding part 142,143 ... Fitting part 162,163 ... Fitting Portion 144,164 …… Recessed groove 145,146 …… Chamfered portion 165,166 …… Chamfered portion 167,168 …… Small stopper 15,17 …… Mating member 151,152 …… Insertion portion 171,172 …… Insertion portion 153,154 …… Chamfered portion 173,174 …… Chamfer 155 …… Collar 175 …… Recessed groove 2 …… Original pipe making means 22 …… Outer layer constituent material winding part 26 …… Curing furnace 3 …… Original pipe take-up means 4 …… Cutting means 41 …… Cutting Blade 5 …… Synthetic resin pipe making device 51 …… Pipe making machine, 52 …… Automatic cutting machine 61 …… Pipe guide rail 62 …… Pipe transfer rail 63 …… Work table 7 …… Filler 8 …… Insertion port Part 81 …… End face 9 …… Reception part 91 …… End face A …… Strip-shaped body, B …… Synthetic resin pipe C …… Synthetic resin pipe, D …… Core pipe E …… Resin composite original pipe F ...... Receive With resin composite pipe F1 ...... socket with a resin composite pipe F2 ...... resin composite pipe

Claims (2)

[Claims] Claim: What is claimed is: 1. A synthetic resin tube of a fixed length is rotated around its axis so as to be advanced along the axis of the tube, and the rotational movement and forward movement of the synthetic resin tube can be transmitted, and the axial direction of the synthetic resin tube can be transmitted. A synthetic resin pipe having the same length as the pipe is connected to the rear end portion of the synthetic resin pipe through a socket molding connecting member having a socket molding portion in the center, and then the connected synthetic resin pipe. To the rear end of the pipe, through the insertion molding connecting member capable of transmitting the rotational movement and the forward movement of the pipe, or again through the socket forming connecting member, and in the same size as the pipe. In the same manner, the resin pipes are connected to each other, and the socket-forming connecting members and the spout-forming connecting members are alternately interposed between the regular-sized synthetic resin pipes, or the socket-forming members are formed. The synthetic resin pipes are sequentially connected by interposing only the connecting member, and a plurality of synthetic resin pipes are connected. A step of forming an integrated core tube, and a step of forming a resin composite tube by winding and laminating an outer layer constituent material on the outer peripheral surface of the core tube that advances along the tube axis while rotating around the tube axis. And, after curing the outer layer constituent material, a step of sequentially cutting the resin composite raw pipe at a connecting portion of the synthetic resin pipe to separate the resin composite pipe into a regular length. Production method. 2. A socket-forming coupling member and an insertion opening, each of which is provided with a minute stopper for contacting with a pipe end surface of a synthetic resin pipe and securing a gap immediately in front of the pipe end surface in a step of forming a core pipe. A molding connecting member is used, and in the step of forming the resin composite raw pipe, the outer layer constituent material is allowed to enter the gap, and the pipe end surface of each synthetic resin pipe is covered with the outer layer constituent material. Item 2. A method for producing a resin composite pipe according to Item 1.