The present invention relates to a winding machine for pipe rehabilitation that rehabilitates an aging pipe and a winding method.
The conventional winding machine includes drive roller portions rotated by a hydraulic motor at a plurality of portions. A rehabilitating pipe increases its weight as the rehabilitating pipes are formed. Additionally, since the rehabilitating pipe contacts an existing pipe, friction resistance with the existing pipe increases as a rehabilitating pipe is formed. Therefore, at the drive roller portion at the subsequent part among drive roller portions disposed at a plurality of portions, a driving force required to rotate the rehabilitating pipe gradually increases. In contrast to this, at the drive roller portion at the preceding part, a plastic strip is sent by a driving force that is equal to that of the initial state. As a result, a difference occurs between a rotation speed of the rehabilitating pipe and a supply speed of the plastic strip. That is, the plastic strip is excessively supplied compared with the formation speed of the rehabilitating pipe. This easily causes a problem that the pipe diameter of the rehabilitating pipe gradually increases.
In contrast to this, a conventional winding machine 8 illustrated in
PATENT LITERATURE 1: Japanese Unexamined Patent Application Publication No. H1-156041
However, the above-described conventional winding machine 8 has problems described below, and there is room for improvement.
In the winding machine 8, the following problems arise. The driving forces of respective hydraulic motors for the drive roller portions 81 and 82 tend to decrease by the braking force of the tension roller portion 83, and a length of the rehabilitating pipe to be formed is short. Therefore, in the winding machine 8, a plurality of hydraulic motors need to be synchronously controlled, which requires a complex structure.
Additionally, the winding machine 8 has a structure where the rehabilitating pipe is formed by joining the plastic strip 85 from the outer periphery side. When a braking force by the tension roller portion 83 becomes slightly insufficient, the plastic strip 85 to be delivered causes looseness, which gradually increases the pipe diameter of the rehabilitating pipe. Therefore, the conventional problem is not sufficiently eliminated.
Further, the plurality of drive roller portions 81 and 82 are disposed on the mandrel 84 at an mutually horizontally opposed position about 180 degrees away. If the winding machine 8 is set up on an invert pit 95 in the manhole 92, the drive roller portions 81 and 82 interfere with the invert pit 95. Accordingly, the invert pit 95 and the periphery of the invert pit 95 need to be formed deep to form a housing space 86 for the drive roller portions 81 and 82. This decreases work efficiency.
The present invention has been made in view of these conventional problems. It is an object of the present invention to provide a winding machine configured without a complex structure with a fewer number of components and a winding method where a rehabilitating pipe with a desired pipe diameter can be precisely and constantly formed at a required length.
This invention provides a winding machine for forming a rehabilitating pipe by spirally winding a plastic strip. The winding machine includes a frame, an introduction unit, a drive unit, and at least one guide member. The frame includes a plurality of plates and a plurality of rollers. The plurality of plates couples one another in a circumferential direction. The plurality of plates are combined in approximately a ring shape. The plurality of rollers are rotatably disposed between the plates facing one another. The frame is separable into a plurality of pieces. The introduction unit is disposed at the frame. The introduction unit includes an inner roller and an outer roller. The inner roller and the outer roller interpose a preceding part and a subsequent part of the plastic strip in a spirally aligned state. The inner roller and the outer roller include a roller portion. The roller portion does not transmit power at least to the subsequent part of the plastic strip. The drive unit is disposed at the frame. The drive unit includes an inner roller and an outer roller. The inner roller and the outer roller interpose a preceding part and a subsequent part of the plastic strip in a joined state. The inner roller and the outer roller transmit power to the plastic strip. The at least one guide member is disposed at the frame. The guide member guides the plastic strip. The introduction unit and the drive unit are disposed above a horizontal surface including a axial center of the frame.
The introduction unit is configured to spirally align the preceding part and the subsequent part without transmitting power to at least the subsequent part of the plastic strip. This allows the drive unit to smoothly draw the plastic strip using the driving force of the drive unit without reducing the driving force. In the introduction unit, the subsequent part of the plastic strip is guided to and drawn into the guide member, and disposed to the preceding part of the plastic strip so as to be adjacent from the inner peripheral side. The plastic strips are joined together in this state and form a rehabilitating pipe. This eliminates the nuisance of gradual increases in the pipe diameter of the rehabilitating pipe, thus forming accurately and stably a rehabilitating pipe with a desired pipe diameter. Further, the introduction unit is configured so as not to reduce the driving force of the drive unit. Therefore, the winding machine can be configured with a simple device structure compared with the conventional winding machine, and therefore a rehabilitating pipe with a longer pipe length than the conventional rehabilitating pipe can be efficiently and stably formed. Additionally, since the frame is separable, the frame can be disassembled and delivered to a pipe manufacturing site such as a manhole, work can be performed in a short time with enhanced versatility. When the winding machine is set up on an invert pit in the manhole, the invert pit, the introduction unit, and the drive unit do not interfere with one another. Accordingly, the winding machine can be installed without cutting the invert pit, work efficiency is improved, and the problems of the conventional winding machine are all eliminated.
In the winding machine, the following configuration is preferable. The introduction unit is configured to: position the plastic strip such that the preceding part and the subsequent part of plastic strip are mutually joined together; or position the preceding part and the subsequent part of the plastic strip in the position and mutually join them together.
This accurately joins the plastic strips adjacent to one another. The driving force of the drive unit is transmitted without any reduction, and the pipe diameter is not increased, thus allowing highly accurate pipe manufacturing.
In the winding machine, the following configuration is preferable. The introduction unit and the drive unit are disposed so as to arrange the drive unit after the introduction unit along a supply route of the plastic strip, and the drive unit draws the subsequent part of the plastic strip through the introduction unit.
Accordingly, in a process where the plastic strips are joined together and a rehabilitating pipe is formed, the drive unit interposes the plastic strip that has become the rehabilitating pipe, and sends out the plastic strip in the direction of the tube axis while rotating it. In accordance with the sending of the rehabilitating pipe, the subsequent part of the plastic strip is drawn into the introduction unit and spirally aligned. This allows accurate joining of the plastic strips and continuous stable pipe manufacturing.
In the winding machine, the following configuration is preferable. The drive unit includes a reducer and a motor. The drive unit rotates two rollers in mutually opposite directions.
This allows rotatably driving the two rollers without configuring a complicated structure. The driving force of the motor can be efficiently transmitted to the rehabilitating pipe and the plastic strip.
In the winding machine, the following configuration is preferable. The guide members are disposed at a plurality of positions at the frame so as to define a supply route of the plastic strip at an inner peripheral side of the outline of the frame.
Thus, since the plastic strip is supplied through the inner peripheral side of the outline of the frame, the plastic strip is guided smoothly to the introduction unit without interference from an existing pipe or manhole.
In the winding machine, the following configuration is preferable. The winding machine further includes a cradle that supports the frame in a state where the frame is suspended.
This ensures a stable installation state and also avoids friction resistance caused by contacting the plastic strip to the existing pipe and the manhole, thus allowing smoothly winding the plastic strip to the frame to accurately manufacture a pipe.
In the winding machine, the following configuration is preferable. The frame includes a first adjustment mechanism that is disposed on at least one portion among coupling portions between the plates. The first adjustment mechanism adjusts a distance between the plates in a circumferential direction.
Accordingly, the outer diameter of the frame can be configured according to the pipe diameters of the rehabilitating pipe and the existing pipe, and the contour length can be adjusted as necessary. This ensures an increased versatility.
In the winding machine, the following configuration is preferable. The frame includes a second adjustment mechanism at one portion among coupling portions between the plates. The second adjustment mechanism shifts the plates one another in the direction of the axis.
This allows smooth winding of the plastic strip spirally along the frame according to the width of the plastic strip, the pipe diameter of the rehabilitating pipe, or other specifications. This ensures increased versatility.
Additionally, a winding method that employs the winding machine with the above-described constitution is also within the technical scope of the present invention. That is, a winding method of the present invention by forming a plastic strip into a rehabilitating pipe includes: installing a winding machine that forms and rotates the rehabilitating pipe at an end portion of a pipe line to be rehabilitated; and supplying a plastic strip to the winding machine. The plastic strip is supplied through a route that passes through an inner peripheral side on an outer extension of the rehabilitating pipe. In a process where the plastic strip is sent forward of the supply route, the method further includes: sending a subsequent part of the plastic strip to the preceding part of the plastic strip from the inner peripheral side of the preceding part and aligning the preceding part and the subsequent part spirally; joining the subsequent part from the inner peripheral side of the preceding part of the aligned plastic strip to form a rehabilitating pipe; and sending out the rehabilitating pipe in a pipe line by rotating the rehabilitating pipe while drawing the subsequent part of the plastic strip to the winding machine.
Thus, the subsequent part of the plastic strip is supplied through a route that passes through the inner peripheral side on the outer extension of the rehabilitating pipe and disposed adjacent to the preceding part of the plastic strip. Without interference from an existing pipe or a manhole in the process, the plastic strip is smoothly guided. The plastic strip is not excessively supplied or insufficiently supplied, but preferably supplied. Since the subsequent part of the plastic strip is joined to the preceding part from the inner peripheral side, the nuisance of gradual increase in the pipe diameter of the formed rehabilitating pipe does not occur, and the rehabilitating pipe with a desired pipe diameter can be accurately and stably formed.
In the winding method, the following configuration is preferable. The plastic strips include a main joining portion and a sub joining portion. The method includes: mutually joining the preceding portion and the subsequent portion together from an inner peripheral side of the plastic strip; and subsequently joining the main joining portion and the sub joining portion together.
Accordingly, the plastic strips can be joined together by two steps. This allows secure joining and the formation of the rehabilitating pipe with high strength and high reliability.
a) and 5(b) illustrate the frame,
a) and 15(b) are explanatory views illustrating one exemplary plastic strip,
Hereinafter, embodiments of a winding machine and a winding method according to the present invention will be described with reference to the accompanying drawings.
As illustrated in
Specifically, as illustrated in
The frame 2 includes a pair of front and back ring-shaped plates 21 and a plurality of rollers 3 disposed between these ring-shaped plates 21. These ring-shaped plates 21 are disposed on the front and the back spacing a distance of approximately almost two times the width of the plastic strip 100. The ring-shaped plate 21 is formed by a plurality of plate materials and is integrally coupled with a plurality of coupling members 23 and 25.
As illustrated in
As illustrated in
With an exemplary configuration, a mutual distance between the two coupling members 23 can be adjusted by the amount of tightening of a center bolt 233, which couples the coupling plates 232. This allows coupling of the upper half portion 2A and the lower half portion 2B while adjusting a distance between them and also allows adjustment of the contour length of the frame 2. A coil spring is interposed in the shaft portion of the bolt 233 to cause an elastic force between the two coupling members 23, thus facilitating the adjustment.
A plurality of rollers 3 are rotatably supported at the frame 2 spacing a distance in the circumferential direction. As illustrated in
The roller 3 is disposed to form a right angle with respect to a lead angle of the plastic strip 100 constituting the rehabilitating pipe 10. In view of this, the formed rehabilitating pipe 10 in the existing pipe 91 can be sent out to the front (the pipe manufacturing direction) with the drive unit 4.
These rollers 3 are disposed at a right angle with respect to the lead angle of the plastic strip 100 as follows. For example, as illustrated in
As one example,
The second coupling member 25 includes two coupling bodies 251, which are coupled to be mutually slidable. Each coupling body 251 includes a joining plate 252 and a coupling plate 253. The joining plate 252 joins the end portions of the ring-shaped plates 21. The coupling plate 253 connects between these joining plates 252. One of the coupling body 251 couples the ring-shaped plates 21 constituting the upper half portion 2A and maintains its mutual distance. The other coupling body 251 couples the ring-shaped plates 21 constituting the lower half portion 2B and maintains its mutual distance. Additionally, one coupling body 251 includes a slide groove 254 while another coupling body 251 includes a slider 255 to be engaged with the slide groove 254.
The second coupling member 25 includes a long bolt 256. The long bolt 256 is disposed from the end portion of one coupling body 251 in contact with the joining plate 252 of the other coupling body 251. Rotation of the long bolt 256 adjusts the amount of slide of the coupling body 251. The mutually sliding coupling bodies 251 can be secured with a bolt 257 of the slider 255.
This couples the upper half portion 2A and the lower half portion 2B and allows the coupling bodies 251 to slide to the pipe axial direction for adjustment while maintaining the mutual distance of the ring-shaped plate 21 in the pipe axial direction. That is, with respect to the upper half portion 2A, the lower half portion 2B can be moved by a length approximately corresponding to the width of the plastic strip 100 in the pipe manufacturing direction. Then, with the lower half portion 2B moved, the upper half portion 2A and the lower half portion 2B are coupled, thus the frame 2 is formed.
Such frame 2 is delivered to the manhole 92 in a state vertically divided into two of the upper half portion 2A and the lower half portion 2B and is assembled to form into a ring at a pipe manufacturing position. This allows installation of the winding machine 1 efficiently in a short time.
The upper half portion 2A of the frame 2 includes the drive unit 4 and the introduction unit 5.
Among these, the drive unit 4 is mounted at approximately the top of the upper half portion 2A. The drive unit 4 interposes the spiral plastic strip 100 at both surfaces and sends it out. The spiral plastic strip 100 goes along the plurality of rollers 3. This regulates the inner diameter of the spiral plastic strip 100. As illustrated in
The rotating shaft of the inner drive roller 41 and the rotating shaft of the outer drive roller 42 are disposed such that the shaft line direction of the rotating shafts is perpendicular to the lead angle of the rehabilitating pipe 10. Each of these rotating shafts is rotatably supported by the gear box 43 along with an output shaft of the hydraulic motor 45. Therefore, when the hydraulic motor 45 is rotatably driven, the gears 44, which are secured to the output shaft, the rotating shaft of the inner drive roller 41, and the rotating shaft of the outer drive roller 42 and engage one another, rotate the inner drive roller 41 and the outer drive roller 42 in mutually opposite directions. The inner drive roller 41 and the outer drive roller 42 interpose the plastic strip 100, and sends out the plastic strip 100 to the front along a plurality of rollers 3 disposed at the frame 2.
Both ends of the rotating shaft of the inner drive roller 41 are rotatably supported with the front and back ring-shaped plates 21. The rotating shaft of the outer drive roller 42 is rotatably cantilevered with the gear box 43 disposed at the front ring-shaped plate 21.
The inner drive roller 41 has a length approximately almost two times the width of the plastic strip 100. The inner drive roller 41 is formed in a cylindrical shape by a material such as iron. The outer diameter of the inner drive roller 41 is set such that the inner drive roller 41 rotates while the outer peripheral surface of the inner drive roller 41 makes contact with the smooth inner peripheral surface of the rehabilitating pipe 10.
The exemplary plastic strip 100 includes a plurality of ribs 102, which form a T shape in the cross section, at a strip plate-shaped substrate 101 (see
The outer drive roller 42 includes a plurality of large diameter rollers 421 and a plurality of small diameter rollers 422. The large diameter roller 421 has a width that can be inserted between the adjacent ribs 102 of the plastic strip 100 and is disposed at the rotating shaft. The large diameter roller 421 rotates while its outer peripheral surface contacts the back surface of the substrate 101 of the plastic strip 100 (the surface at the side that becomes the outer peripheral surface of the rehabilitating pipe 10) between the adjacent ribs 102 of the plastic strip 100.
The small diameter rollers 422 are formed corresponding to the apical surface (approximately T-shaped part) of the respective ribs 102 of the plastic strip 100, and are disposed at the rotating shaft. The outer peripheral surface of the small diameter roller 422 rotates in contact with the apical surface of the rib 102 of the plastic strip 100. Knurling is performed on the outer peripheral surface of the small diameter roller 422. Thus, the outer drive roller 42 sends out the joined plastic strip 100 (the rehabilitating pipe 10) without sliding.
In the winding machine 1, a driving source that rotates the inner drive roller 41 and the outer drive roller 42 of the drive unit 4 is not limited to the hydraulic motor 45, but an electric motor and an air motor are also applicable. As a reducer, a chain sprocket or similar component may be employed instead of the gear 44.
The introduction unit 5 is, as illustrated in
The introduction unit 5 includes, as illustrated in
The rotating shaft of the inner roller 51 and the rotating shaft of the outer roller 52 are disposed such that the shaft line direction of the rotating shafts is orthogonal to the lead angle of the rehabilitating pipe 10. Both ends of the rotating shaft of the inner roller 51 are rotatably supported by the front and back ring-shaped plates 21. The rotating shaft of the outer roller 52 is rotatably cantilevered with a supporting member 27 disposed at the front ring-shaped plate 21.
The introduction unit 5 does not include a power source to rotate these inner roller 51 and outer roller 52. The plastic strip 100 is drawn and interposed between the inner roller 51 and the outer roller 52. In accordance with extraction of the plastic strip 100 with the drive unit 4, the inner roller 51 and the outer roller 52 rotate mutually in opposite directions.
The inner roller 51 has a length approximately almost two times a width of the plastic strip 100. The inner roller 51 is formed in a cylindrical shape by a material such as iron. The outer diameter of the inner roller 51 is set such that the inner roller 51 rotates while the outer peripheral surface of the inner roller 51 makes contact with the smooth inner peripheral surface of the rehabilitating pipe 10. This positions the joint concave portion 105 of the preceding plastic strip 100 and the joint convex portion 103 of the subsequent spiral plastic strip 100 of the rehabilitating pipe 10 to the joining position, and joins them.
It is preferred that the outer roller 52 include a plurality of large diameter rollers 521 and a plurality of small diameter rollers 522 similarly to the above-described outer drive roller 42. The large diameter roller 521 rotates while its outer peripheral surface contacts the back surface of the substrate 101 of the plastic strip 100, which is the surface of the side that becomes the outer peripheral surface of the rehabilitating pipe 10. The small diameter roller 522 rotates while its outer peripheral surface contacts the apical surface of the rib 102 of the plastic strip 100 at the side that becomes the outer peripheral surface of the rehabilitating pipe 10. Knurling is performed on the outer peripheral surface of the small diameter roller 522. The outer roller 52 may be a cylindrical roller similarly to the inner roller 51.
As described above, the drive unit 4 rotates and sends out the rehabilitating pipe 10 where the plastic strip 100 has been joined. In contrast to this, the introduction unit 5 smoothly draws the subsequent part of the plastic strip 100 without generating resistance while aligning the subsequent part with the preceding part of the plastic strip 100, which has become the rehabilitating pipe 10, by the actuation of the drive unit 4. The frame 2 forms a space by coupling the upper half portion 2A and the lower half portion 2B by shifting them in the pipe axial direction. The plastic strip 100 is drawn into the introduction unit 5 through this space. Thus, the subsequent part of the plastic strip 100 is sent from the introduction unit 5 to the drive unit 4.
The frame 2 includes a plurality of guide members 6 to guide the plastic strip 100 to the introduction unit 5. The guide member 6 is, as illustrated in
One end portion of each of the plurality of guide members 6 is attached to the ring-shaped plate 21 of the frame 2. The guide member 6 is evenly disposed at the ring-shaped plate 21. The plastic strip 100 is supplied from a drum 94, and as illustrated in
The introduction unit 5 interposes both the plastic strip 100 drawn through the guide member 6 (the subsequent part) and the plastic strip 100 of the rotating rehabilitating pipe 10 (the preceding part). The plastic strip 100 drawn into the introduction unit 5 rotates the inner roller 51 and the outer roller 52 of the introduction unit 5 in mutually opposite directions. This sends the plastic strip 100 and the adjacent rehabilitating pipe 10 to the drive unit 4.
In the introduction unit 5, when the plastic strip 100 is sent out, the joint convex portion 103 of the subsequent plastic strip 100 and the joint concave portion 105 of the preceding plastic strip 100 are disposed at the position where the joint convex portion 103 and the joint concave portion 105 can be mutually joined together. Simultaneously, these are mutually joined together to form into a pipe.
The introduction unit 5 may be configured to simply position the plastic strip 100 to a position where joining is allowed without joining. In that case, another mechanism that joins the plastic strip 100 is preferred to be disposed somewhere in a route where the plastic strip 100 that has passed through the introduction unit 5 reaches the drive unit 4. For example, a joining mechanism may be disposed between the introduction unit 5 and the drive unit 4. The joining mechanism subsequent to the introduction unit 5 includes a set of rollers that join the plastic strip 100. Further, the configuration is not limited to the above-described configuration, but the following configuration is also applicable. The joint convex portion 103 and the joint concave portion 105 of the plastic strip 100 are joined at the introduction unit 5. In the joining mechanism at the subsequent part, the inclined rib 106 of the plastic strip 100 may be locked to the rib 102.
In the winding machine 1, the frame 2 is preferably supported by a cradle 7. As illustrated in
Next, a description will be given of a method for forming the rehabilitating pipe 10 employing the above-described winding machine 1.
As illustrated in
The frame 2 is delivered into the starting side manhole 92 divided into two by the upper half portion 2A, which includes the introduction unit 5 and the drive unit 4, and the lower half portion 2B. The frame 2 is assembled into a ring in the starting side manhole 92. At this time, the outer diameter of the frame 2 is set according to the pipe diameter of the rehabilitating pipe 10.
The frame 2 of the winding machine 1 is secured to the cradle 7 via the gear box 43. At this time, the positions of the winding machine 1 in the vertical direction and the horizontal direction are adjusted, and the winding machine 1 is secured in a suspended state with respect to the invert pit 95. A hydraulic pressure pipe from the power unit 96 is coupled to the hydraulic motor 45 of the drive unit 4.
After such preparatory work is completed, the plastic strip 100 is extracted from the outer periphery side of the drum 94 disposed on the ground and drawn into the starting side manhole 92. The distal end portion of the plastic strip 100 is inserted through the guide member 6 disposed at the frame 2, and the plastic strip 100 is guided to the introduction unit 5 of the winding machine 1. Then, the plastic strip 100 is inserted between the inner roller 51 and the outer roller 52 of the introduction unit 5.
Next, the distal end portion of the plastic strip 100 is inserted between the inner drive roller 41 and the outer drive roller 42 of the drive unit 4, and the plastic strip 100 is sent to the outer periphery side of the roller 3 of the frame 2. After that, the hydraulic motor 45 rotatably drives to rotatably drive the inner drive roller 41 and the outer drive roller 42 in mutually opposite directions to send out the interposed plastic strip 100.
The sent plastic strip 100 is wound along the roller 3. The plastic strip 100 is spirally wound. When the distal end portion of the plastic strip 100 reaches the introduction unit 5 again, the plastic strip 100 is deviated to the arrival side manhole 93 side by the amount corresponding to the width. Accordingly, the distal end portion of the plastic strip 100 can be inserted through the introduction unit 5 again.
At this time, as illustrated in
Next, the joined adjacent plastic strips 100 are inserted through the drive unit 4 to form a rehabilitating pipe 10A for starting. That is, the hydraulic motor 45 of the drive unit 4 is driven, and the adjacent plastic strips 100, which have been joined to one another, are sent out. Furthermore, the plastic strip 100 is wound along the roller 3 and passed through the introduction unit 5 and the drive unit 4 in this order several times to form the rehabilitating pipe 10A.
The hydraulic motor 45 of the drive unit 4 of the winding machine 1 continuously drives. The inner drive roller 41 and the outer drive roller 42 rotatably drive while interposing the rehabilitating pipe 10A and the plastic strip 100 adjacent to the rehabilitating pipe 10A. In accordance with this, the plastic strip 100 continued to the latter end of the rehabilitating pipe 10A is newly drawn into the introduction unit 5.
In the introduction unit 5, the rehabilitating pipe 10A, that is, the joint convex portion 103 of the subsequent spiral plastic strip 100 is adjacently disposed from the inner peripheral side to the joint concave portion 105 of the preceding spiral plastic strip 100. The side edge portion of the substrate 101 at the side where the joint convex portion 103 of the subsequent plastic strip 100 is disposed is positioned at the step portion 104 of the preceding plastic strip 100, and both are joined together. Furthermore, the rib 102 at the side where the joint convex portion 103 of the subsequent plastic strip 100 is disposed is locked to the inclined rib 106 of the proceeding plastic strip 100 (see
Continuous driving of the hydraulic motor 45 of the drive unit 4 allows the inner drive roller 41 and the outer drive roller 42, which rotatably drive in the mutually opposite directions, to interpose the joined plastic strip 100, namely, the rehabilitating pipe 10 together with the starting rehabilitating pipe 10A, or interpose the rehabilitating pipe 10. Then, the rehabilitating pipe 10 added to the starting rehabilitating pipe 10A is sent out to the arrival side manhole 93 while rotating.
When the drive unit 4 sends out the rehabilitating pipe 10, the subsequent part of the plastic strip 100 is newly drawn into the introduction unit 5. The introduction unit 5 positions and joins the joint convex portion 103 at the subsequent part of the plastic strip 100 to the preceding part of the plastic strip 100, that is, the joint concave portion 105 of the plastic strip 100 that has become the rehabilitating pipe 10.
During this process, as illustrated in
In the winding machine 1, the driving source is only the hydraulic motor 45 of the drive unit 4. In the winding machine 1, a complicated control structure to synchronize a plurality of hydraulic motors is not required. In view of this, the winding machine 1 can be constituted by an extremely simple structure. Accordingly, the winding machine 1 can be manufactured at a low cost. Further, the introduction unit 5 does not include a power portion such as a motor; therefore, the plastic strip 100 is not excessively supplied to the drive unit 4. The supply amount and the supply speed of the plastic strip 100 are preferably maintained. Accordingly, excessive supply of the plastic strip 100 is prevented, the situation where the pipe diameter of the rehabilitating pipe 10 gradually increases is avoided.
Additionally, in the winding machine 1, a braking force that reduces the driving force of the hydraulic motor 45 does not occur. This prevents the situation of an increase in the pipe diameter of the rehabilitating pipe 10 due to a lack of braking force. Furthermore, all driving force of the drive unit 4 can be utilized to send the rehabilitating pipe 10. Accordingly, the length of the rehabilitating pipe 10 formed at a time can be increased compared with the conventional apparatus.
The rehabilitating pipe 10 is manufactured while always contacting the existing pipe 91, which curved shape unevenly. A vibration caused by shaking of the rehabilitating pipe 10 in the lateral direction is transmitted to the winding machine 1. Accordingly, the rehabilitating pipe 10 is attempted to move vertically, horizontally, or other directions with respect to the secured winding machine 1. The winding machine 1 supports the rehabilitating pipe 10 by interposing it at two portions, which are a position of the inner drive roller 41 and the outer drive roller 42 of the drive unit 4 and a position of the inner roller 51 and the outer roller 52 of the introduction unit 5. Accordingly, the winding machine 1 can reduce vertical and horizontal movements of the rehabilitating pipe 10. Thus, slipping out of the rehabilitating pipe 10 from the drive unit 4 by a swinging movement in vertical and horizontal directions can be avoided.
When the rehabilitating pipe 10 is formed, the rehabilitating pipe 10 is manufactured by winding the plastic strip 100 at the periphery of the roller 3 of the frame 2. Thus, the inner diameter of the rehabilitating pipe 10 is always regulated. Accordingly, the plastic strip 100 can be joined from the inner peripheral side of the adjacent plastic strip 100, and therefore the nuisance of a gradual decrease in the pipe diameter of the rehabilitating pipe 10 does not occur.
The winding machine 1 includes the drive unit 4 and the introduction unit 5 at the position above the horizontal surface that passes through the axial center of the existing pipe 91. That is, as illustrated in
As a result, with the winding machine 1 of a simple structure, the rehabilitating pipe 10 with the desired set pipe diameter can be smoothly formed. The rehabilitating pipe 10 longer than the conventional rehabilitating pipe can be manufactured at a time.
As described above, after the rehabilitating pipe 10 is formed across the whole length of the region to be rehabilitated at the existing pipe 91, the plastic strip 100 at the end portion of the rehabilitating pipe 10 is cut off, and the winding machine 1 is disassembled and cleared from the starting side manhole 92. Then, the pipe manufacturing work is completed.
The above-described embodiment describes the case where the joint concave portion 105 of the preceding plastic strip 100 and the joint convex portion 103 of the subsequent plastic strip 100 in the introduction unit 5 are mutually positioned and joined. The winding machine 1 and the winding method according to the present invention is not construed in a limiting sense. The plastic strip 100 is not necessarily to be joined.
For example, if the plastic strip 100 is drawn into the winding machine 1, the plastic strip 100 is brought up from the drum 94. At this time, at the position near the manhole 92, the operator may adjust the extraction amount of the plastic strip 100 from the drum 94 to match it to the amount of pipe to be manufactured. The plastic strip 100 is elastically deformed to a predetermined curvature radius by being wound and stacked to the drum 94. Therefore, it is difficult for the operator to supply the appropriate amount of the plastic strip 100 according to the amount of the rehabilitating pipe 10 to be manufactured.
If the supply amount of the plastic strip 100 becomes short with respect to the amount of the rehabilitating pipe 10 to be manufactured, the joint convex portion 103 of the subsequent part of the plastic strip 100 brought up from the drum 94 moves to the center direction away from the joint concave portion 105 of the preceding plastic strip 100, with respect to the preceding plastic strip 100 of the rehabilitating pipe 10. There is a possibility that the plastic strips 100 may not be joined. However, even in this case, the large diameter roller 521 of the outer roller 52 of the introduction unit 5 is disposed between the ribs 102 of the plastic strip 100 at the subsequent part. The large diameter roller 521 positions the subsequent plastic strip 100 such that the joint convex portion 103 of the subsequent plastic strip 100 faces the joint concave portion 105 of the preceding plastic strip 100 (the rehabilitating pipe 10). Then in the state, the plastic strip 100 is sent out to the drive unit 4.
Accordingly, with the subsequent part of the plastic strip 100 aligned with the preceding part, the plastic strip 100 is drawn into the drive unit 4. The inner drive roller 41 and the outer drive roller 42 of the drive unit 4 interpose these plastic strips 100 adjacent to one another. This ensures joining of the joint concave portion 105 and the joint convex portion 103 of the plastic strip 100, thus forming the rehabilitating pipe 10. Accordingly, the drive unit 4 forms the rehabilitating pipe 10, and sends out the rehabilitating pipe 10 forward while rotating it.
With a winding method according to the present invention, a position where the winding machine 1 is to be installed may be at the opening end portion of a vertical shaft or the existing pipe 91 as well as inside of the manhole 92.
The winding machine 1 and a winding method according to the present invention can be embodied and practiced in other different forms as well as the above-described embodiment. Accordingly, the present invention is not limited to the above-described embodiment, and, for example, the constitutions illustrated in
The winding machine 1 illustrated in
As illustrated in
In the introduction unit 5, the outer roller 54 is configured to not transmit power to the subsequent part of the plastic strip 100. In the exemplary embodiment, the outer roller 54 includes a roller 54A and a roller 54B. The roller 54A is disposed at approximately a half portion closer to the gear box 56 at the outer roller 54. That is, the roller 54A is disposed to the position where the subsequent part of the plastic strip 100 is positioned between the roller 54A and the inner roller 53.
The roller 54A and the roller 54B include, similarly to the outer roller 52, a plurality of large diameter rollers 541 and a plurality of small diameter rollers 542. Among these, the diameter of the roller 54A is reduced such that the outer diameter of the small diameter roller 542 does not contact the rib 102 of the plastic strip 100. Further, knurling is not performed on the outer peripheral surface of the small diameter roller 542 of the roller 54A, and the outer peripheral surface is formed to be a smooth surface. This allows the roller 54A and the inner roller 53 to interpose the plastic strip 100 without transmitting rotation drive force to the plastic strip 100. In contrast to this, the roller 54B has a constitution where knurling is performed on the outer peripheral surface of the small diameter roller 542, and the roller 54B interposes the preceding part of the plastic strip 100 with the inner roller 53 and transmits rotation drive force.
In the winding machine 1 according to this embodiment as well, the plastic strip 100 is not excessively supplied to the drive unit 4. As a result, the supply amount and the supply speed of the plastic strip 100 are preferably maintained. The situation where the pipe diameter of the rehabilitating pipe 10 gradually increases is avoided, thus enabling accurate manufacture of a pipe while maintaining a uniform pipe diameter.
As the introduction unit 5 with a constitution where power is not transmitted at least to the subsequent part of the plastic strip 100, a bearing may be interposed between the roller 54A and the rotating shaft of the outer roller 54. Similarly, a bearing may be interposed between the inner roller 53 and the rotating shaft.
The winding machine 1 according to the present invention may be an embodiment illustrated in
The auxiliary roller 59 includes a base portion 591 attached to the frame 2, a shaft portion 592, and a disk-shaped roller 593. The shaft portion 592 extends from the base portion 591 to the outer peripheral surface of the frame 2. The roller 593 is rotatably supported by the shaft portion 592. The roller 593 has a common outer diameter with a large diameter roller 543 illustrated in
As described above, the introduction unit 5 positions the plastic strips 100 such that the preceding part and the subsequent part of the plastic strips 100 are allowed to be mutually joined, and mutually joins them together. At this time, in the introduction unit 5, as illustrated in
Thus, in the winding machine 1 illustrated in
Additionally, in the winding machine 1 and the winding method according to the present invention, the plastic strip 100 constituting the rehabilitating pipe 10 is not limited to the plastic strips 100 illustrated in
As illustrated in
The present invention can be embodied and practiced in other different forms without departing from the spirit and essential characteristics of the present invention. Therefore, the above-described embodiments are considered in all respects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims rather than by the foregoing description. All variations and modifications falling within the equivalency range of the appended claims are intended to be embraced therein. The present application is based on Japanese Patent Application No. 2011-024122, the content of which is hereby incorporated.
The present invention is effectively utilized to a winding machine and a winding method where a rehabilitating pipe is formed employing a plastic strip.
Number | Date | Country | Kind |
---|---|---|---|
2011-024122 | Feb 2011 | JP | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/JP2012/052756 | 2/7/2012 | WO | 00 | 6/7/2013 |