JP6927783B2 - Spiral tube making device - Google Patents

Description

The present invention relates to a pipe making device that manufactures a spiral tube by winding a strip-shaped member in a spiral shape, and in particular, a pipe manufacturing device that manufactures a strip-shaped member in which a guide groove is formed along the longitudinal direction of the outer peripheral side portion. Regarding the device.

It is known to rehabilitate an existing pipe by lining the rehabilitated pipe along the inner peripheral surface of the existing pipe such as an aged sewer pipe. As an example of the rehabilitation tube, a spiral tube formed by spirally winding a band-shaped member made of synthetic resin is known. Ribs and reinforcing strips made of steel are provided on the outer peripheral side of the strip-shaped member. Guide grooves are formed by these ribs and reinforcing strips. The guide groove opens on the outer peripheral side of the band-shaped member and extends along the longitudinal direction of the band-shaped member.

The strip-shaped member is made into a spiral pipe by using a pipe making device (see Patent Documents 1 to 3 and the like). At least a pair of inner peripheral side and outer peripheral side drive rollers, a drive motor, and gears connecting them are stored in the drive unit of the pipe making device.
The inner peripheral side drive roller has a cylindrical shape and is pressed against the flat inner peripheral surface of the strip-shaped member.
The outer peripheral side drive roller includes a large-diameter roller portion and a small-diameter roller portion. The large diameter roller portion fits into the guide groove. The small-diameter roller portion is pressed against the rib of the strip-shaped member or the end face on the outer peripheral side of the reinforcing strip (for example, Patent Document 1).

As a result, the small-diameter roller portion of the outer peripheral side drive roller and the inner peripheral side drive roller sandwich the strip-shaped member, and these drive rollers are rotationally driven in synchronization with each other.
By this rotational drive, the trailing band portion of the unmade pipe in the strip-shaped member is sequentially sent to the leading spiral pipe portion that has already been spirally manufactured, and the adjacent edges of the trailing band portion and the leading spiral pipe portion are uneven. It is fitted and the pipe making proceeds.

By fitting the large-diameter roller portion into the guide groove, the strip-shaped member is positioned in the axial direction of the outer peripheral side drive roller and is guided along a predetermined track.
Therefore, the conventional outer peripheral side drive roller has both a drive function of applying a driving force to the strip-shaped member to advance the pipe making and a guide function of guiding the strip-shaped member along a predetermined trajectory.

There is also a pipe making device in which the large-diameter roller portion of the outer peripheral side drive roller is inserted to the depth of the guide groove, and the flat portion of the strip-shaped member is sandwiched between the large-diameter roller portion and the inner peripheral side drive roller (for example, Patent Document 2). .. In this case, the pinching force can be increased. The large-diameter roller section has both a drive function and a guide function.

In the pipe making device of Patent Document 3, the drive portion is arranged on the inner peripheral side of the leading spiral pipe portion. The trailing band portion is sandwiched between the inner peripheral side drive roller and the outer peripheral side drive roller of the drive portion, and is pushed out obliquely toward the leading spiral pipe portion. By unevenly fitting the adjacent edges of the trailing band portion and the leading spiral pipe portion to each other, a reaction force of propulsion is generated and the pipe making device is propelled.

Japanese Unexamined Patent Publication No. 2013-234705 (Fig. 4) Japanese Unexamined Patent Publication No. 2010-023350 (Fig. 8) International release WO 2016/175243 (Fig. 3)

In the pipe making device of Patent Document 1 and the like described above, since it is necessary to provide a large-diameter roller portion on the outer peripheral side drive roller, the drive portion becomes large. If the diameter of the large-diameter roller portion is reduced for miniaturization, the large-diameter roller portion and the guide groove are less likely to be caught, and the strip-shaped member is likely to come off.
In the case of the pipe making device of Patent Document 2, the large-diameter roller portion of the outer peripheral side drive roller needs to have a larger diameter, and the gear also needs to have a larger diameter, so that the drive portion becomes even larger. As the height of the ribs of the strip-shaped member increases, the drive unit becomes larger and larger.
When the drive unit becomes large, it cannot be inserted into an existing pipe or a manhole with a small diameter, and the applicable range is limited. In particular, in the case of the pipe manufacturing device of Patent Document 3, it is necessary to arrange the drive unit inside the leading spiral pipe portion and arrange the outer peripheral side drive roller closer to the leading spiral pipe portion than the inner peripheral side drive roller. If the outer peripheral side drive roller has a large diameter, it cannot be arranged.
In view of such circumstances, it is an object of the present invention to make it possible to reduce the diameter of the outer peripheral side drive roller in the spiral tube making device, thereby making the drive unit smaller, and to secure a guide function for a strip-shaped member. ..

In order to solve the above-mentioned problems, the present invention spirally winds a strip-shaped member having a guide groove formed along the longitudinal direction of the outer peripheral side portion in a spiral shape and joins adjacent edges one round apart. It is a pipe making device that makes pipes.
An inner peripheral side drive roller and an outer peripheral side drive roller that are rotated by sandwiching the strip-shaped members with each other.
The outer peripheral side drive roller is provided at a position corresponding to the guide groove in the axial direction so as to project from the outer peripheral side drive roller toward the inner peripheral side drive roller side, and is cut from the rotation of the outer peripheral side drive roller. With a separate guide member,
It is characterized by being equipped with.

The inner peripheral side drive roller is pressed against the inner peripheral surface of the strip-shaped member. The outer peripheral side drive roller is pressed against the outer peripheral surface of the strip-shaped member. These drive rollers sandwich the strip-shaped members with each other and rotate to advance the pipe making.
The outer peripheral side drive roller mainly has a drive function for advancing pipe production. The guide member is responsible for the guide function for the band-shaped member. Therefore, it is not necessary to provide a large-diameter roller portion for guidance on the outer peripheral side drive roller, and the outer diameter side drive roller can be reduced in diameter. As a result, the drive unit of the pipe making device can be miniaturized. Even if the height of the rib of the strip-shaped member is large, the size can be reliably reduced.
The guide member fits into the guide groove of the strip-shaped member by being arranged at a position corresponding to the guide groove in the axial direction of the outer peripheral side drive roller. As a result, the strip-shaped member can be positioned in the axial direction of the outer peripheral side drive roller. Furthermore, by increasing the protruding height of the guide member toward the drive roller on the inner peripheral side and fitting it deeply into the guide groove, it is possible to reliably prevent the strip-shaped member from coming off the pipe making device, and the strip-shaped member can be made regular. It can be reliably guided along the track.
Even if the height of the guide member protruding toward the drive roller on the inner peripheral side is increased, the size of the drive unit is not increased.

It is preferable that the guide member has a plate shape orthogonal to the axis of the outer peripheral side drive roller, and the outer peripheral side drive roller rotatably penetrates the guide member.
As a result, the guide member and the outer peripheral side drive roller can be engaged with each other in a direction orthogonal to the axis of the outer peripheral side drive roller without relative displacement.
One guide member may be arranged so as to straddle a plurality of outer peripheral drive rollers.

It is preferable that the protrusion height of the guide member from the outer peripheral side drive roller to the inner peripheral side drive roller side is larger than the protrusion height from the outer peripheral side drive roller to the side opposite to the inner peripheral side drive roller.
By increasing the protruding height of the guide member toward the drive roller on the inner peripheral side, it is possible to reliably prevent the strip-shaped member from coming off the pipe making device. By reducing the protruding height of the guide member to the opposite side, the drive unit of the apparatus main body can be reliably miniaturized.

According to the pipe making device of the present invention, the diameter of the outer peripheral side drive roller can be reduced, the drive unit can be miniaturized, and the guide function can be ensured by the guide member.

FIG. 1 is a cross-sectional view showing how the existing pipe is rehabilitated. FIG. 2 is an explanatory side view schematically showing a pipe making device according to the first embodiment of the present invention. FIG. 3 is a perspective view of a rehabilitated pipe (spiral pipe) being made by the pipe making device. FIG. 4 is a perspective view of the outer peripheral side drive roller and the guide member of the pipe making device. FIG. 5 is a cross-sectional view taken along the line VV of FIG. FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a state in which an aging existing pipe 1 is rehabilitated. Examples of the existing pipe 1 include sewer pipes, water pipes, agricultural water pipes, hydroelectric power transmission pipes, gas pipes and the like. The rehabilitation pipe 9 is lined on the inner wall of the existing pipe 1. The rehabilitation pipe 9 is composed of a long strip-shaped member 90.

As shown in FIG. 5, the strip-shaped member 90 has a certain cross section and extends in a direction substantially orthogonal to the paper surface of the figure. The band-shaped member 90 includes a band body 90a made of a synthetic resin such as polyvinyl chloride, and a metal reinforcing band 96 such as steel. The inner peripheral side surface of the strip-shaped member 90 (the surface facing the inner peripheral side when the rehabilitation pipe 9 is formed, the upper surface in FIG. 5) is flat. A guide groove 95b is formed on the outer peripheral side portion of the strip-shaped member 90 (the side portion facing the outer peripheral side when the rehabilitation pipe 9 is formed, the lower portion in FIG. 5) by the rib 95 of the belt body 90a and the reinforcing strip member 96. ing. The guide groove 95b is opened on the outer peripheral side of the band-shaped member 90 and extends along the longitudinal direction of the band-shaped member 90.

As shown in FIGS. 3 and 6, the strip-shaped member 90 is spirally wound by the pipe making device 3, and the fitting portions 93 and 94 (FIG. 6) of the edges adjacent to each other by one round difference are formed by uneven fitting. By joining, a spiral tubular rehabilitation tube 9 is formed. Hereinafter, the rehabilitation tube 9 is appropriately referred to as a “spiral tube 9”.

As shown in FIGS. 2 and 3, the pipe making device 3 includes a device frame 3f, a drive unit 10, leading pipe end guides 21 and 22, 23, and a device frame 3f holding them (two points in FIG. 2). It is schematically shown by a chain line). The drive unit 10 is arranged on the inner peripheral side of the leading pipe portion 91 that has already been spirally manufactured in the strip-shaped member 90, and is engaged with the trailing strip portion 92 of the unmade pipe in the strip-shaped member 90. The leading pipe end guides 21, 22, and 23 are engaged with the extended end portion 91e of the leading pipe portion 91.
The stretched end portion 91e refers to a portion about one circumference of the front end (left end in FIG. 1) in the direction in which the leading pipe portion 91 is stretched along the pipe axis.

As shown in FIG. 2, the drive unit 10 includes two (plurality) drive roller pairs 10X and 10X and two (plurality) guide members 13 and 13. Two drive roller pairs 10X and 10X are arranged side by side along _{the feed direction a 92 of the trailing band portion 92.} Each drive roller pair 10X includes an inner peripheral side drive roller 11 and an outer peripheral side drive roller 12.

As shown in FIG. 5, the inner peripheral side drive roller 11 has a cylindrical shape. The axis of the inner peripheral side drive roller 11 is directed in the width direction (left-right direction in FIG. 5) of the pipe making device 3. The inner peripheral side drive roller 11 is pressed against the flat inner peripheral side surface of the trailing band portion 92.

The outer peripheral side drive roller 12 has a cylindrical shape. The axis of the outer peripheral side drive roller 12 is directed in the width direction (left-right direction in FIG. 5) of the pipe making device 3 in parallel with the axis of the inner peripheral side drive roller 11. A pinch portion 12a is provided at an intermediate portion in the axial direction of the outer peripheral side drive roller 12. A flatfish knurl is formed on the outer peripheral surface of the pinch portion 12a as a non-slip means.
The pinch portion 12a is pressed against the outer peripheral portion of the succeeding band portion 92. Specifically, it is pressed against the outer peripheral side surface (lower surface in FIG. 5) of the reinforcing strip 96.
The inner peripheral side drive roller 11 and the pinch portion 12a sandwich the trailing band portion 92 from the inner peripheral side and the outer peripheral side.
The pinch portion 12a may be pressed against the outer peripheral end surface (lower end surface in FIG. 5) of the rib 95, or may be pressed against both the rib 95 and the reinforcing strip 96.

Although not shown, the drive unit 10 is provided with a drive motor and a gearbox. The drive motor is connected to the drive rollers 11 and 12 via gears so as to be able to transmit torque.

As shown in FIG. 5, both sides of the pinch portion 12a in the axial direction of the outer peripheral side drive roller 12 are positions corresponding to the guide groove 95b. Guide members 13 are arranged at positions corresponding to the guide grooves. Each guide member 13 has a plate shape orthogonal to the axis of the outer peripheral side drive roller 12. As shown in FIG. 2, the guide member 13 extends obliquely _{from the outer peripheral side drive roller 12 along the feed direction a 92 of the trailing band portion 92.} The tip portion of the guide member 13 in the extending direction is formed narrowly and reaches near the leading pipe portion 91. As shown in FIG. 4, two (plurality) guide members 13 and 13 are arranged in parallel with each other separated from each other in the axial direction of the outer peripheral side drive roller 12.

Each guide member 13 straddles two (plural) outer peripheral side drive rollers 12, 12. Two (plurality) through holes 13c and 13c are formed in the guide member 13. These through holes 13c and 13c have a one-to-one correspondence with the two outer peripheral side drive rollers 12. Each outer peripheral side drive roller 12 rotatably penetrates the corresponding through hole 13c. The guide member 13 is separated from the rotation of the outer peripheral side drive roller 12.
A bearing may be provided on the inner peripheral surface of the through hole 13c.

As shown in FIG. 5, the guide member 13 includes a first portion 13a projecting from the through hole 13c and thus the outer peripheral side drive roller 12 to the inner peripheral side drive roller 11 side (upper side in FIG. 5), and the through hole 13c and thus the outer circumference. It has a second portion 13b protruding from the side drive roller 12 on the side opposite to the inner peripheral side drive roller 11 (lower side in FIG. 5). _{The protruding height H 13a} of the first portion 13a from the outer peripheral side drive roller 12 is larger than _{the protruding height H 13b} of the second portion 13b _{(H 13a} > H _13b ).

As shown in FIG. 5, the first portion 13a of each guide member 13 is fitted into the corresponding guide groove 95b in the trailing band portion 92. The guide member 13 sets the trajectory of the trailing band portion 92 between the drive portion 10 and the leading pipe portion 91.

As shown in FIG. 2, the pipe end guides 21 are in the shape of a pair of plates, are arranged on the front side portion (left side in FIG. 2) in the propulsion direction of the pipe making device 3, and are the extended end portions of the leading pipe portion 91. Friction resistance is generated by sandwiching 91e from the inner peripheral side and the outer peripheral side.
The pipe end guide 22 has a roller shape and is arranged on the rear side portion (right side in FIG. 2) in the propulsion direction of the pipe making device 3, and presses the extended end portion 91e of the leading pipe portion 91 from the inner peripheral side. ing.
The pipe end guide 23 has a plate shape and is arranged slightly in front of the pipe end guide 22 (left side in FIG. 2) in the propulsion direction of the pipe making device 3, and the extended end portion 91e of the leading pipe portion 91 is placed on the outer peripheral side. I'm holding it down from.

The pipe making device 3 has a non-inner circumference regulation structure. That is, it does not have an inner peripheral restricting body such as a so-called link roller that regulates the cross section (shape, peripheral length, diameter) of the extended end portion 91e of the leading pipe portion 91 from the inner peripheral side. The stretched end 91e is in a state of being released to the inner peripheral side.
If there is no inner peripheral restrictor, the speed of fitting the leading pipe portion 91 with the succeeding belt portion 92 tends to be unstable, and as a result, the supply speed of the succeeding belt portion 92 may become excessive. However, the track guide member 31 prevents the trailing band portion 92 from buckling.

The rehabilitation pipe 9 (spiral pipe) is made by the pipe making device 3 as follows.
As shown in FIG. 1, it is assumed that the leading pipe portion 91 is formed to some extent in the existing pipe 1.
The trailing band portion 92 of the strip-shaped member 90 is introduced into the drive portion 10 of the pipe making device 3 from the manhole 4 through the inside of the leading pipe portion 91, and is sandwiched by the drive rollers 11 and 12 (FIG. 2). ..
The drive rollers 11 and 12 are rotationally driven in synchronization with each other. As a result, the trailing band portion 92 is obliquely pushed out toward the extended end portion 91e of the leading pipe portion 91.
At the fitting position 90p (FIG. 3) on or near the pipe end guide 23, the second fitting portion 94 of the trailing band portion 92 and the first fitting portion 93 of the portion one round ahead of the leading pipe portion 91 Be fitted.
The fitting creates a propulsion reaction force, which propels the tube making device 3 clockwise in FIG. 3 along the spiral winding direction. As a result, the rehabilitation pipe 9 can be made along the inner surface of the existing pipe 1 while the pipe making device 3 is self-propelled.

By fitting the guide member 13 into the guide groove 95b, the trailing band portion 92 can be guided along the extending direction of the guide member 13.
By making the protruding height of the first portion 13a of the guide member 13 sufficiently large and fitting it deeply into the guide groove 95b, it is possible to reliably prevent the trailing band portion 92 from coming off from the pipe making device 3. Moreover, the trailing band portion 92 can be reliably positioned in the axial direction of the drive rollers 11 and 12. Further, the trailing band portion 92 between the drive unit 10 and the leading pipe portion 91 can be reliably guided along the trajectory set by the guide member 13, and the derailment of the trailing band portion 92 can be prevented. As a result, the trailing band portion 9 can be reliably fed to the extended end portion 91e of the leading pipe portion 91 to be fitted, and the spiral pipe 9 can be reliably manufactured.

The outer peripheral side drive roller 11 only needs to have a drive function for pushing out the trailing band portion 92, and does not need to have a guide function for guiding the trailing band portion 92 along a predetermined trajectory. Therefore, it is not necessary to provide the outer peripheral side drive roller 11 with a large diameter roller portion for guidance, and the outer diameter side drive roller can be reduced in diameter. As a result, the drive unit 10 can be miniaturized. Even if the height of the rib 95 of the Ibi-shaped member 90 is large, the drive unit 10 can be reliably miniaturized.
_{Further, by making the protruding height H 13b} of the second portion 13b of the guide member 13 _{smaller than the protruding height H 13a} of the first portion 13a, the drive unit 10 can be further miniaturized.
With respect to the first portion 13a of the guide member 13, the _{guide function can be reliably exerted by increasing the protrusion height H 13a and} thus the recessing depth into the guide groove 95b. Even if the protruding height H _13a is increased, the size of the drive unit 10 is not increased.
At the time of maintenance or the like, the outer peripheral side drive roller 11 and the guide member 13 can be easily separated by pulling out the outer peripheral side drive roller 11 in the axial direction.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the number of drive rollers vs. 10X is not limited to two, and may be only one or three or more.
The number of the guide members 13 is not limited to two, and may be only one or three or more.
The drive roller pair 10X may be arranged at the fitting position 90p of the trailing band portion 92 and the leading pipe portion 91. The inner peripheral side drive roller 11 and the outer peripheral side drive roller 12 may directly sandwich and fit the trailing band portion 92 and the leading pipe portion 91 at the fitting position 90p.
The pipe making device may have an inner circumference restricting body such as a so-called link roller.

The present invention can be applied to rehabilitation techniques such as sewer pipes, water pipes, and agricultural water pipes.

1 Existing pipe (outer circumference regulator)
3 Pipe making device 3f Device frame 4 Human hole 10 Drive unit 10X Drive roller pair 11 Inner circumference side drive roller 12 Outer circumference side drive roller 12a Pinch part 13 Guide member 13a First part 13b Second part H _13a Protruding height of the first part H _13b Protruding height of the second part 13c Through hole 21 Pipe end guide 22 Pipe end guide 23 Pipe end guide 9 Rehabilitation pipe (spiral pipe)
90 Band-shaped member 90a Band body 91 Leading pipe 91e Extended end of leading pipe 92 Subsequent band 93 First fitting 94 Second fitting 95 Rib 95b Guide groove 96 Reinforcing strip

Claims (2)

It is a pipe making device that manufactures a spiral pipe by spirally winding a strip-shaped member in which a guide groove is formed along the longitudinal direction of the outer peripheral side portion and joining adjacent edges that are different in one circumference. ,
An inner peripheral side drive roller and an outer peripheral side drive roller that send out the strip-shaped member in the feeding direction by sandwiching the strip-shaped member with each other and rotating the strip-shaped member.
The outer peripheral side drive roller is provided at a position corresponding to the guide groove in the axial direction so as to project from the outer peripheral side drive roller toward the inner peripheral side drive roller side, and is cut from the rotation of the outer peripheral side drive roller. With a distant guide member,
The guide member has a through hole through which the outer peripheral side drive roller is rotatably penetrated, and is extended in the feed direction from the through hole so as to be long in the feed direction and the outer peripheral side. A pipe making device characterized by having a long plate shape orthogonal to the axis of a drive roller. The guide member is characterized in that the protrusion height from the outer peripheral side drive roller to the inner peripheral side drive roller side is larger than the protrusion height from the outer peripheral side drive roller to the side opposite to the inner peripheral side drive roller. The pipe making device according to claim 1.

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