JP2019116001A - Apparatus and method for producing belt-like member - Google Patents

Abstract

To stably fit a reinforcement belt material into a main belt material even if a sectional shape of the main belt material is unstable.SOLUTION: A method of producing a belt-like member of this invention comprises steps of: rolling out a synthetic resin main belt material 20 of a belt-like member 2 to be made a spiral tube from first roll-out means 10; rolling out a metal reinforcement belt material 30 from second roll-out means 13; fitting the reinforcement belt material 30 into a to-be-fitted part 23 formed in the main belt material 20 to form the belt-like member 2; and correcting a sectional shape of the main belt material 20 by correction means 50 during, before, or after the fitting.SELECTED DRAWING: Figure 1

Description

  The present invention relates to, for example, a strip-shaped member manufacturing apparatus for forming a strip-shaped member to be a spiral tube lined with an aging buried pipe, and in particular, a strip-shaped member including a main strip made of synthetic resin and a reinforcing strip made of metal. The present invention relates to a strip-shaped member manufacturing apparatus for forming

  There is known a method of helically lining a strip-shaped member on the inner circumferential surface of a buried pipe such as an aging sewer pipe and regenerating it (see, for example, Patent Document 1). As the above-mentioned belt-like member, in addition to a main band made of synthetic resin, one including a steel reinforcing band for increasing the strength is known. The main strip is extruded and then wound on a winding drum because it is long. Thereafter, it is unwound from the winding drum and merged with a reinforcing band from another drum. And a reinforcement band material is inserted between a plurality of ribs of a main band material, and it becomes a beltlike member.

JP 2012-250414 A

The main strip may be curled when wound on a winding drum, and the cross-sectional shape may be plastically deformed. In particular, the ribs in the width direction and the other projecting pieces tend to be plastically deformed so as to fall outward. For this reason, a reinforcement band material can not be stably inserted in the main band material after delivery.
An object of this invention is to enable it to be able to insert stably a reinforcement strip material even if the cross-sectional shape of the main strip material is unstable in view of such a situation.

In order to solve the above problems, the device according to the present invention is a belt-like member manufacturing device for forming a belt-like member to be a spiral tube from a main belt made of synthetic resin and a metal reinforcing band,
A first feeding means for feeding the main band material from a wound state;
Second feeding means for feeding the reinforcing band material;
Fitting means for fitting the reinforcing band material into the fitting part formed on the main band material to form the band-like member;
Correction means provided at or before and after the fitting means and correcting the cross-sectional shape of the main band;
It is characterized by having.
When the main band is plastically deformed in cross section, the cross-sectional shape of the main band is corrected by the correcting means before and after inserting the reinforcing band. By this, even if the cross-sectional shape of the main band is unstable, the reinforcing band can be stably fitted.

It is preferable that the correction means includes a pressing portion that presses the main band member so as to narrow the width of the fitting portion.
By this, when the fitting part is deformed so as to widen, the cross-sectional deformation can be surely corrected by the pressing of the pressing part.

The fitting means includes a pair of sandwiching parts sandwiching and sandwiching the main band and the reinforcing band, and the pressing part pressing the main band in cooperation with the sandwiching part Is preferred.
Thus, the cross section of the main band can be corrected simultaneously with the insertion of the reinforcing band. In addition, the main band is restrained in the width direction by the pinching by the pair of pinching portions, and it is possible to take the reaction force of the pressing by the pressing portion. That is, since the fitting means has the function of receiving the reaction force of the correction means, the correction means does not require a reaction force receiving member for the pressing portion, and the configuration can be simplified.

It is preferable that the pressing portion includes a correction roller which can rotate around its own axis.
The main roller is pressed while the correction roller rotates. This makes it possible to correct the cross section while feeding the main strip sequentially.

The rotational axis of the correction roller is directed in the width direction orthogonal to the feeding direction of the main strip, and the outer peripheral surface of the correction roller is tapered such that the diameter of the outer surface of the correction roller is expanded outward in the width direction. preferable.
When the cross section of the main band is bent and deformed, the bending deformation can be corrected by obliquely pressing the end portion in the width direction of the main band by the tapered correction roller.

The rotational axis of the correction roller may be oblique to a width direction orthogonal to the feeding direction of the main band.
The rotation axis of the correction roller may be orthogonal to the width direction orthogonal to the feeding direction of the main band and the feeding direction.

The method of the present invention is a method of manufacturing a strip member to be a helical tube from a main strip made of synthetic resin and a reinforcing strip made of metal,
Unrolling the main strip from the wound state;
Feeding out the reinforcing band material;
Forming the band-shaped member by fitting the reinforcing band member into the fitting portion formed in the main band member;
Correcting the cross-sectional shape of the main strip at or before or after the fitting;
It is characterized by having.
In the correction step, it is preferable to press the main band material so as to narrow the width of the fitting portion.

  According to the present invention, even if the cross-sectional shape of the main strip is unstable, the reinforcing strip can be stably fitted, and the strip-shaped member to be a helical tube can be stably produced.

FIG. 1 is a side view showing a schematic configuration of a strip-shaped member manufacturing apparatus according to a first embodiment of the present invention. FIG. 2A is a cross-sectional view of the main strip of the strip-shaped member before extrusion and subsequent winding on the primary winding drum. FIG.2 (b) is sectional drawing of the said main strip material in alignment with the IIb-IIb line | wire of FIG. FIG. 3 is a cross-sectional view of the reinforcing strip taken along the line III-III of FIG. FIG. 4 is a front cross-sectional view taken along line IV-IV of FIG. 1 and illustratively showing the fitting means and the correction means of the strip-shaped member manufacturing apparatus. FIG. 5 is a cross-sectional view of the strip-shaped member taken along the line V-V in FIG. FIG. 6 (a) is a cross-sectional view of the buried pipe rehabilitated by the rehabilitating pipe consisting of the strip-like member. FIG. 6 (b) is an enlarged cross-sectional view of the circle portion VIb of FIG. 6 (a). FIG. 7 is a front sectional view illustratively showing the fitting means and the correcting means of the strip-shaped member manufacturing device according to the second embodiment of the present invention. FIG. 8 is a front sectional view illustratively showing the fitting means and the correcting means of the strip-shaped member manufacturing device according to the third embodiment of the present invention. FIG. 9 is a front cross-sectional view showing the fitting means and the correction means of the strip-shaped member manufacturing apparatus according to the fourth embodiment of the present invention. FIG. 10 is a front sectional view illustratively showing the fitting means and the correcting means of the strip-shaped member manufacturing device according to the fifth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First Embodiment
1 to 6 show a first embodiment of the present invention. The manufacturing object of the form of this invention is the strip | belt-shaped member 2 for rehabilitating the existing buried pipe 3 which became old. As shown in FIG. 6 (a), as the buried pipe 3, in addition to the sewer pipe, a water pipe, a water pipe for agriculture, a gas pipe and the like can be mentioned. The belt-like member 2 is helically lined along the inner periphery of the buried pipe 3 to form a spiral tubular retread pipe 4.

  As shown in FIG. 5, the strip 2 includes a main strip 20 and a reinforcing strip 30. The material of the main band member 20 is a synthetic resin such as polyvinyl chloride. The material of the reinforcing strip 30 is a metal such as steel.

  As shown in FIG. 2 (a), the main band 20 is formed in a constant cross section by extrusion molding of the synthetic resin, and extends in a long shape in a direction perpendicular to the paper surface of FIG. 2 (a). Two (plural) ribs 22 and 24 (protrusions) are provided separately in the width direction (left and right in FIG. 2A) on the back surface (upper side in the figure) of the flat flat band portion 21 of the main strip 20 It is done. A concave fitted portion 23 is formed between the ribs 22 and 24. Male and female fitting portions 26 and 25 are provided at both ends of the flat band portion 21. The rib 24 of 1 protrudes from the female fitting portion 26. On the outer side in the width direction of the female fitting portion 26, a sub-locking projecting piece 27 is formed so as to obliquely project.

  As shown in FIG. 3, the reinforcing strip 30 includes a body 31 with a U-shaped cross section and a pair of arms 32 and 34 that are folded back obliquely from both ends, and is formed into a substantially W-shaped constant cross section And extends in a direction perpendicular to the paper surface of FIG. A recessed groove 35 is formed between both walls of the trunk 31 and the arms 32 and 34.

  As shown in FIG. 5, in the belt-like member 2, the reinforcing band material 30 is fitted into the fitting portion 23. The tip of one arm 32 is engaged with a corner 22 c formed by the middle projection 22 b of the rib 22 and the rib 22. The tip of the other arm 34 is locked to a corner 24 c formed by the middle projection 24 b of the rib 24 and the rib 24. The reinforcing strip 30 enhances the strength of the strip 2.

  As shown in FIG. 6 (b), in the spiral tubular retreading tube 4 composed of the strip-like member 2, the fitting portions 25, 26 adjacent to each other in a circle are engaged with each other in a concavo-convex manner. And, the tip end portion of the sub-lock projection piece 27 is locked to the L-shaped locking portion 22 a at the tip end of the rib 22 adjacent to one another in a circle.

  As shown in FIG. 1, the strip-shaped member 2 is manufactured by a strip-shaped member manufacturing apparatus 1. The strip-shaped member manufacturing apparatus 1 includes a first delivery means 10, a winding means 12, a second delivery means 13, and a fitting means 14.

  The first delivery means 10 is provided with a primary winding drum 11 and a primary winding drum support (not shown) for rotatably supporting the drum 11. On the primary winding drum 11, the main strip 20 after being extruded is wound.

  The winding means 12 is provided with a secondary winding drum 12a and a secondary winding drum supporting portion (not shown) for rotatably supporting the drum 12a. The manufactured strip member 2 is wound around the secondary winding drum 12a.

  The second delivery means 13 is provided with another take-up drum 13a and a take-up drum support (not shown) for rotatably supporting the drum 13a. A reinforcing band 30 is wound around the winding drum 13a.

As shown in FIG. 1, the fitting means 14 is provided between the first delivery means 10 and the winding means 12. The inserting means 14 includes a pair of pinching rollers 41 and 42 (pinching portions). As shown in FIG. 4, the first pinching roller 41 (a pinching portion on the main band side) has a cylindrical shape. The axis L ₄₁ of the first pinching roller 41 is directed in the width direction TD (left and right direction in FIG. 4) orthogonal to the feed direction MD of the main band 20.

As shown in FIG. 4, two second holding rollers 42 are disposed above the first holding roller 41 so as to be separated from each other in the width direction TD. Each second pinching roller 42 has a disk shape whose axis is directed in the width direction TD.
The first and second pinching rollers 41 and 42 oppose each other in an opposing direction HD (upper and lower in FIG. 4) orthogonal to the feed direction MD and the width direction TD.

As shown in FIG. 4, correction means 50 is incorporated in the fitting means 14. The correction means 50 includes a correction roller 51 (pressing portion) rotatable about its own axis. Rotation axis _{L 51} of the correction roller 51 is directed in the width direction TD. The correction roller 51 is disposed coaxially with the first pinching roller 41 on the outer side in the width direction TD of the first pinching roller 41. The outer peripheral surface of the correction roller 51 has a tapered shape in which the diameter increases toward the outer side (right side in FIG. 4) in the width direction TD. Inclination angle alpha ₅₁ of the outer peripheral surface relative to the axis _{L 51} of the correction roller 51 is about α ₅₁ = 40 ° ~45 ° is preferred.
The correction roller 51 may be integrally rotated with the first pinching roller 41, or may be rotatable independently of the first pinching roller 41.

The strip-shaped member 2 is manufactured as follows.
<Extrusion molding process>
The main strip 20 is extruded into a long strip of a constant cross section (FIG. 2 (a)) by an extruder (not shown).
<Primary winding process>
The extruded main strip 20 is once wound on the primary winding drum 11 because it is long.
As shown in FIG. 2 (b), the main band 20 in the primary winding drum 11 is bent by winding, is given a curl, and can be plastically deformed. For this reason, the cross-sectional shape of the main strip 20 is unstable. For example, the ribs 24 and the sub-locking lugs 27 tend to be deformed so as to fall to the outside in the width direction TD or to be deformed so as to widen the fitted portion 23.

<Main strip feeding process>
As shown in FIG. 1, the main strip 20 in the deformed state is unwound from the primary winding drum 11 and sent to the inserting means 14.
<Reinforcement band material feeding process>
In parallel, the reinforcing band 30 is fed from the secondary winding drum 12 a and sent to the inserting means 14.

<Fitting-in process>
In the inserting means 14, the main band 20 and the reinforcing band 30 are joined together and stacked, and are introduced between the pair of pinching rollers 41 and 42 and pinched by the pinching rollers 41 and 42. .
More specifically, as shown in FIG. 4, the first pinching roller 41 is applied to the front side surface (the lower surface in the figure) of the flat band portion 21 of the main band portion 20. Two second pinching rollers 42 are respectively inserted into the two recessed grooves 35 of the reinforcing strip 30. By sandwiching the pinching rollers 41 and 42, the reinforcing strip 30 is fitted into the fitting portion 23 of the main strip 20. By this, the strip-shaped member 2 is formed.

<Correction process>
At the same time as the fitting, the correction roller 51 is pressed against the outer side in the width direction of the fitting portion 23 of the main strip 20. Specifically, the tapered outer peripheral surface of the correction roller 51 is diagonally pressed against the corner 27 c of the base end of the sub-lock projection 27. As a result, a pressing force is applied from the correction roller 51 to the corner 27c.
By this pressing force, the rib 24 and the sub-lock projection 27 which are deformed so as to fall to the outside in the width direction TD are raised. By making the direction of the pressing force oblique, it is possible to reliably correct the falling of the rib 24 and the sub-lock protrusion 27. Therefore, the width of the fitted portion 23 which has been subjected to the widening deformation is narrowed.
By this, the bending of the main strip 20 is corrected, and the cross-sectional shape at the time of extrusion molding is approached. Therefore, the tip of the arm 34 can be reliably engaged with the corner 24c. As a result, even if the cross-sectional shape of the main band member 20 is unstable, the reinforcing band member 30 can be stably fitted into the fitting portion 23. As a result, the strip 2 can be manufactured stably.
By incorporating the correction means 50 into the fitting means 14, the cross section of the main band 20 can be corrected simultaneously with the fitting of the reinforcing band 30. Moreover, the correcting means 50 presses the main band 20 in cooperation with the pinching rollers 41 and 42 of the inserting means 14. That is, the main band member 20 is restrained in the width direction by the pinching by the pinching rollers 41 and 42. As a result, the reaction force of the pressure applied by the correction roller 51 can be obtained. Therefore, the correction means 50 need not have a separate reaction force receiving member, and the structure of the correction means 50 can be simplified.

By rotation of the rollers 41, 42 and 51, the strip-shaped member 2 after the fitting and correction is sent out from the fitting means 14. The belt-like member 2 is wound around the secondary winding drum 12a.
The strip member 2 is transported to the reworking site in a state of being wound around the secondary winding drum 12a, and is lined with the buried pipe.

Next, another embodiment of the present invention will be described. The same numerals are given to a drawing about a configuration which overlaps with a form as stated above in the following embodiments, and explanation is omitted.
Second Embodiment
FIG. 7 shows a second embodiment of the present invention.
In the second embodiment, the correction means is integrated with the first pinching roller 41B (pinch portion on the main band side) of the fitting means. Specifically, the first pinching roller 41B includes a central cylindrical straight portion 43 and tapered portions 44 and 45 at both ends. The straight portion 43 and the tapered portions 44, 45 are disposed on the same axis _L41B . The tapered portions 44 and 45 are each expanded in diameter toward the outside in the width direction TD. The tapered portion 45 on the sub lock projection 27 side is a correction roller. The tapered portion 45, that is, the correction roller 45 presses the rib 24 and the sub-lock projection 27 in the direction of raising by abutting on the corner 27 c. Further, the central portion in the width direction of the main strip 20 can be pushed down toward the straight portion 43. As a result, the width of the fit-in portion 23 can be reliably narrowed and returned to the original size, and the reinforcing strip 30 can be stably fitted.
The second embodiment is effective to correct bending deformation such that the cross section of the main band 20 is warped as a whole.

Third Embodiment
FIG. 8 shows a third embodiment of the present invention.
In the third embodiment, the correction roller 53 of the correction means has a straight cylindrical shape. The correction roller 53 is disposed to face the front end of the sub-lock projection 27 of the main strip 20. Rotation axis _{L 53} of the correction roller 53 is oriented parallel to the opposing direction HD (vertical in FIG. 8).
The sublock projection 27 is pressed by the correction roller 53 toward the fitting portion 23 side. Thereby, the cross-sectional deformation of the main band 20 can be corrected, and the reinforcing band 30 can be stably fitted.

Fourth Embodiment
FIG. 9 shows a fourth embodiment of the present invention.
In the fourth embodiment, the cylindrical correction roller 54 is disposed to face the front side surface of the sub-lock protrusion 27 of the main strip 20. Rotation axis L ₅₄ of the correction roller 54, in accordance with the original angle of the sub lock protrusion 27, are oblique with respect to the width direction TD and the opposing direction HD.
The sublock projection 27 is brought up parallel to the correction roller 54 by pressing the sublock projection 27 against the correction roller 54. Therefore, the sub-locking piece 27 can be reliably returned to the original angle. Thereby, the cross-sectional deformation of the main band 20 can be corrected, and the reinforcing band 30 can be stably fitted.

Fifth Embodiment
FIG. 10 shows a fifth embodiment of the present invention.
In the fifth embodiment, a cylindrical correction roller 55 is disposed between the rib 24 of the main band 20 and the sub lock projection 27. Rotation axis L ₅₅ of the correction roller 55 is a little slanted to the opposing direction HD, it may be straight along the opposing direction HD. The correction roller 55 is pressed against the rib 24 to press the rib 24 toward the fitting portion 23. As a result, the rib 24 is directly erected, and the sub-locking piece 27 is raised accordingly. Thereby, the cross-sectional deformation of the main band 20 can be corrected, and the reinforcing band 30 can be stably fitted.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention.
For example, the pressing portion of the correction means is not limited to a conical (taper) or cylindrical roller, and may be a plate or a block.
The correction means may be disposed between the first delivery means 10 and the fitting means 14. The main band 20 may be corrected before the fitting process.
The correction means may be disposed closer to the winding means 12 than the fitting means 14. The fitting state of the reinforcing band 30 may be corrected by correcting the main band 20 after the fitting process.
The cross-sectional shapes of the main band member 20 and the reinforcing band member 30 are not limited to those illustrated, but various cross-sectional shapes can be applied.

  The present invention can be applied to, for example, the rehabilitation technology of buried pipes such as aged sewer pipes.

DESCRIPTION OF SYMBOLS 1 band-shaped member manufacturing apparatus 2 band-shaped member 3 buried pipe 4 reinforcement pipe 10 1st delivery means 13 2nd delivery means 14 insertion means 20 main band material 23 fitting part 30 reinforcement band material 41, 42 pair of pinching parts 41B 1st Clamping roller (nipping portion on the main band side)
50 Correcting Means 51 Correcting Roller (Pressing Section)
53 Correction roller (pressing part)
54 Correction roller (pressing part)
55 Correction roller (pressing part)
43 Straight part 45 Tapered part (correction roller)
L _{41 B} , L ₅₁ , L ₅₃ , L ₅₄ , L ₅₅ , Rotational axis MD Feeding direction TD Width direction HD Opposing direction

Claims (9)

A belt-like member manufacturing apparatus for forming a belt-like member to be a spiral tube from a main belt made of a synthetic resin and a reinforcing band made of a metal,
A first feeding means for feeding the main band material from a wound state;
Second feeding means for feeding the reinforcing band material;
Fitting means for fitting the reinforcing band material into the fitting part formed on the main band material to form the band-like member;
Correction means provided at or before and after the fitting means and correcting the cross-sectional shape of the main band;
An apparatus for manufacturing a strip-shaped member, comprising:   The strip-like member manufacturing apparatus according to claim 1, wherein the correction means includes a pressing portion that presses the main band material so as to narrow the width of the fitting portion. The fitting means includes a pair of sandwiching portions for overlapping and sandwiching the main band and the reinforcing band;
The strip member manufacturing apparatus according to claim 1, wherein the pressing portion presses the main band material in cooperation with the pinching portion.   The belt-like member manufacturing apparatus according to claim 2, wherein the pressing portion includes a correction roller which can rotate around its own axis.   The rotational axis of the correction roller is directed in the width direction orthogonal to the feed direction of the main strip, and the outer peripheral surface of the correction roller is tapered such that the diameter of the outer surface of the correction roller is expanded outward in the width direction. The strip | belt-shaped member manufacturing apparatus of Claim 4 characterized by the above-mentioned.   The belt-like member manufacturing apparatus according to claim 4, wherein a rotation axis of the correction roller is oblique to a width direction orthogonal to the feeding direction of the main band material.   The belt-like member manufacturing apparatus according to claim 4, wherein a rotation axis of the correction roller is orthogonal to a width direction orthogonal to the feeding direction of the main band and the feeding direction. A method of manufacturing a strip member to be a spiral tube from a main strip made of synthetic resin and a reinforcing strip made of metal,
Unrolling the main strip from the wound state;
Feeding out the reinforcing band material;
Forming the band-shaped member by fitting the reinforcing band member into the fitting portion formed in the main band member;
Correcting the cross-sectional shape of the main strip at or before or after the fitting;
A belt-like member manufacturing method comprising:   The said strip | belt-shaped member is pressed in the said correction process so that the width | variety of the said to-be-fitted part may be narrowed, The strip-shaped member manufacturing method of Claim 8 characterized by the above-mentioned.

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