JPH0811419B2 - Pipe making machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a pipe manufacturing machine capable of manufacturing a spiral tube having a predetermined diameter in a manhole, for example.

(Prior Art) Along with the deterioration of concrete sewer pipes, the inner peripheral surface of the sewer pipes is lined with synthetic resin insertion pipes. Synthetic resin intubation is usually inserted from the manhole to which the sewer pipe ends are connected. However, in a small-diameter sewer pipe, the manhole is narrow, and a long insertion pipe must be inserted into the manhole. I can't.

For this reason, it is possible to install a pipe manufacturing machine, which manufactures a spiral pipe by spirally winding a strip, in a manhole, and directly insert the spiral pipe manufactured by the pipe manufacturing machine into the sewer pipe. Has been done. The pipe-making machine used in such a method is formed by arranging a plurality of pipe-making rollers in a cylindrical shape, as disclosed in, for example, JP-A-55-61434. Introducing a strip into the cylindrical space, forcibly bending by rolling the strip to the pipe-making roller,
Manufacture spiral tubes. When manufacturing a spiral pipe with such a pipe making machine, the cylindrical space formed by each pipe making roller should be coaxial with the sewer pipe and have a diameter substantially equal to the outer diameter of the sewer pipe. Each tube making roller must be provided.

On the other hand, the bottom part of the manhole to which the sewer pipe is connected may be inverted so that a groove equal to the lower half circumference of the sewer pipe is formed coaxially with the sewer pipe in order to improve the flow of the sewer pipe. In a manhole having such an invert, in the conventional pipe making machine, the lower pipe making roller cannot be arranged at a predetermined position due to the presence of the invert, and the outer diameter is substantially equal to the inner diameter of the sewer pipe. Since the spiral pipe cannot be manufactured concentrically with the sewer pipe, the invert had to be destroyed in advance.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, and an object thereof is to provide an outer diameter substantially equal to the inner diameter of a sewer pipe without destroying the invert even in a manhole having the invert. (EN) Provided is a pipe manufacturing machine capable of manufacturing a spiral pipe having a pipe in a concentric manner with the sewer pipe.

(Means for Solving the Problems) In the pipe manufacturing machine of the present invention, a strip is forcibly bent in a spiral shape, and a side portion of the strip adjacent to the width direction between adjacent strips. It is a pipe manufacturing machine that engages with each other to manufacture spiral pipes.
Arranged along the upper half of the spiral tube to be manufactured,
A plurality of pipe-forming rollers forming a semi-cylindrical upper space, and a semi-cylindrical lower part having substantially the same radius as the upper space below the semi-cylindrical upper space formed by the pipe-making rollers. The flexible pipe-making zone arranged so that a space can be formed, and the pipe-forming body at the introduction part of the strip-shaped body introduced into the cylindrical space formed by the pipe-making zone and each pipe-making roller. An introduction roller which is arranged to face the roller via a gap and is rotatable and drivable, and a strip-shaped body is introduced into the cylindrical space from the gap between the pipe-making roller and the introduction roller, The strip is made to abut the inner surfaces of the pipe-making strip and the pipe-making rollers, whereby the above object is achieved.

(Example) Hereinafter, the present invention will be described with reference to Examples.

The pipe manufacturing machine of the present invention is installed in a manhole having an invert, and for example, a synthetic resin strip is continuously spirally wound so that its axis is substantially horizontal, and is also spirally wound. The spiral pipes are continuously manufactured by engaging the adjacent widthwise side portions of the swirled strips, and the spiral pipes manufactured by the pipe manufacturing machine are sequentially disposed in the sewer pipe. Is inserted into.

The pipe making machine according to the present invention includes, for example, a horizontally elongated rectangular parallelepiped frame body 10 as shown in FIGS. 1 and 2, and, for example, six pipe making rollers 21 to 26 supported by the frame body 10. And, for example, four chain rollers 30 as pipe pipes, which hang down below the frame 10.

The plurality of pipe making rollers 21 to 26 supported by the frame body 10 are arranged to form a semi-cylindrical space having a predetermined inner diameter,
Each chain roller 30 is arranged so as to form a semi-cylindrical space that matches the semi-cylindrical space. The strip-shaped body is introduced into the cylindrical space formed by the pipe-making rollers 21 to 26 and the chain rollers 30 and is forced during contact with the chain rollers 30 and the pipe-making rollers 21 to 26 to move. Is bent and spirally wound.

The tube-making rollers 21 to 26 are movable so that the diameter of the semi-cylindrical space to be formed can be changed. On the other hand, one end of the chain roller 30 is fixed to a roller mount 15 which will be described later, but the other end of the chain roller 30 is locked to a receiving roller 40 arranged on one side of the lower portion of the frame body 10. The length of the chain roller 30 is changed by changing the position of the chain roller 30 locked to the receiving roller 40, and the diameter of the semi-cylindrical space formed by the chain roller 30 is changed. It

At each corner of the frame 10, there are four legs 10 extending vertically.
c, 10c, ... are installed. Each leg 10c is vertically movable with respect to the frame body 10, and each leg 10c can be moved at any position.
10c is fixed to the frame body 10. The frame 10 is supported by each leg 10c.

Of the six pipe making rollers 21 to 26, two pipe making rollers 21 and 22 have a large diameter, and the other four pipe making rollers 23 to 26 have a small diameter. The large-diameter pipe-making roller 21 is arranged on one side of the lower part of the frame body 10, and the large-diameter pipe-making roller 22 on the other side is
It is arranged in the upper center of the frame body 10. Chain roller 30
The receiving roller 40 that locks the end of the frame 10 is arranged on the other side of the lower part of the frame body 10 so as to face the pipe making roller 21 arranged on one side of the lower part.

These tube-making rollers 21, 22 and receiving roller 40 are the third
As shown in the figure, they are supported by guide blocks 14a, 14b, 14c, respectively. A substantially horizontal screw shaft 12a and a guide shaft 13a pass through a guide block 14a that supports the pipe-making roller 21 disposed in the lower portion of the frame body 10. One end of the screw shaft 12a and the guide shaft 13a is supported by one side frame 10d of the frame body 10, and the other end is arranged in the center of the lower side of the front side of the frame body 10 in a front view square. Small frame 11
Is supported by a frame facing the side frame 10d. The guide block 14a is screwed with the screw shaft 12a, but slidable with the guide shaft 13a. Therefore,
By rotating the screw shaft 12a, the guide block 14a
Moves along the guide shaft 13a.

The screw shaft 12c and the guide shaft 13c, which are substantially horizontal, also penetrate the guide block 14c that supports the receiving roller 40. The screw shaft 12c and the guide shaft 13c are provided between the other side frame 10e of the frame body 10 and a frame of the small frame body 11 facing the side frame 10e. Guide block
The 14c is screwed with the screw shaft 12c and slidable with the guide shaft 13c.

The guide block 14b supporting the pipe-making roller 22 arranged at the upper portion has a screw shaft installed between the upper frame 10a of the frame body 10 and the frame of the small frame body 11 facing the upper frame 10a. 12b and the guide shaft 13b penetrate. The guide block 14b is screwed with the screw shaft 12b,
It is slidable with 13b.

The guide block 14a arranged on one side of the lower part of the frame 10 has a roller mount 15 as shown in FIG.
Is supported by a cantilever, and the roller shaft 18 has a roller shaft 18 and bearings 16 and 1 on the roller base 15 so as to be substantially orthogonal to the guide shaft 13a.
It is rotatably supported at 7. The bearing 16 located on the guide block 14a side is a normal bearing, and is rotatably attached to the roller mount 15 by bolts 16a. As the other bearing 17, a free bearing such as a spherical bearing is used so that the roller shaft 18 can be rotated even if the roller shaft 18 is tilted. Each end of the roller shaft 18 is rotatably supported by the bearings 16 and 17, but the roller shaft 18 is movable in the axial direction with respect to the universal bearing 17. A pipe making roller 21 is externally fitted on the roller shaft 18.

The other bearing 17 is slidable in a direction substantially orthogonal to the roller shaft 18 with respect to the roller mount 15 so that the roller shaft 18 of the pipe making roller 21 can rotate about the one bearing 16. ing. That is, the universal bearing 17 is, as shown in FIG.
It is attached to the guide plate 19a by penetrating through the long hole 15a formed in the roller mount 15. The long hole 15a extends in a direction substantially orthogonal to the roller shaft 18, and the guide plate 19a
Is capable of sliding on the surface of the roller mount 15 in a direction substantially orthogonal to the roller shaft 18. A nut member 19b is fixed to the guide plate 19a, and a bolt 19c is screwed into the nut member 19b. The bolt 19c
Are supporting members 19e and 19f mounted on the roller mount 15.
Therefore, when the bolt 19c is rotated, the nut member 19b of the guide plate 19a is screwed along the axis of the bolt 19c, and the universal bearing 17 has the long hole 1
Move along 5a. Since the universal bearing 17 supports the roller shaft 18 so as to be movable in the axial direction thereof, the roller shaft 18, and thus the pipe making roller 21, causes the other bearing 16 to move by the movement of the universal bearing 17 along the long hole 15a. Rotate around.

Also in the guide block 14b arranged on the upper part of the frame body 10,
The pipe-making roller 22 is supported by the same structure. Therefore, these pipe-making rollers 21 and 22 are different from the other pipe-making rollers 23.
There is a predetermined helix angle with respect to the semi-cylindrical space formed by ~ 26.

As shown in FIG. 6, a receiving roller 40 is supported by a guide block 14c facing the guide block 14a supporting the pipe making roller 21. In the receiving roller 40, for example, four roller members 41, 41, ... Are externally fitted to one roller shaft 42, and each end of the roller shaft 42 is supported by bearings 43 and 44. Each bearing 43 and 44 is a guide block
It is attached to a roller mount 45 which is cantilevered on 14c. Locking members 46, 46, ... For locking the chain roller 30 are provided on each roller member 41. The end of each chain roller 30 is locked to each locking member 46,
The length of each chain roller 30 depending on the frame 10 is specified. One bearing 44 that supports the roller shaft 42 is provided with a fixing screw 47 that fixes the rotation of the roller shaft 42. By loosening the fixing screw 47 and rotating the roller shaft 42, a locking member is provided. The length of each chain roller 30 locked to 46 is changed. By locking the fixing screw 47, the locking member 46 is fixed at an arbitrary position. Each roller member 41 is slidable in the axial direction, and is fixed by a pin at an arbitrary position.

Small diameter pipe forming rollers excluding large diameter pipe forming rollers 21 and 22
23 to 26, as shown in FIG.
Two small-diameter pipe rollers 23 and 24 are arranged between the large-diameter pipe roller 22 and the receiving roller 40.
Two other small diameter pipe rollers 25 and 26 are provided. Small diameter pipe roller adjacent to the large diameter pipe roller 21 at the bottom
23 is arranged on a roller mount 23a attached to the upper frame 10a of the frame body 10 so as to be movable in the radial direction of a semi-cylindrical space formed by all the pipe-making rollers. The small diameter pipe roller
The small-diameter pipe roller 24 adjacent to 23 is the upper large-diameter pipe roller
It is attached to a roller mount 22a that supports 22.

Small diameter pipe roller 25 adjacent to the upper large diameter pipe roller 22
Are arranged on the roller mount 24a attached to the upper frame 10a so as to be movable in the radial direction of the semi-cylindrical space. Further, the small-diameter pipe roller 26 adjacent to the small-diameter pipe roller 25
Are arranged on a roller mount 45 that supports the receiving roller 40.

As shown in FIG. 7, this small-diameter pipe-making roller 26 has a plurality of spherical rolls 26b, 26b, ... Externally fitted to a roller shaft 26a, and each spherical roll 26b moves in the axial direction of the roller shaft 26a. Can tilt and rotate. The roller shaft 26a is fixed so that its axis is parallel to the front-back direction of the frame body 10. Similarly, the other small-diameter pipe-forming rollers 23 to 25 are also fixed so that the roller shafts thereof are parallel to the front-rear direction of the frame body 10, and a plurality of spherical rolls are fitted onto the roller shafts.

As shown in FIGS. 4 and 8, an introduction roller 50 is supported on the roller mount 15 that supports the large diameter pipe-making roller 21 at the bottom. The introduction roller 50 is fitted onto a roller shaft 51, and the roller shaft 51 is cantilevered by a bracket 52. The bracket 52 is attached to a spacer 53 fitted onto the roll shaft 21a, and the spacer 53 is attached to one bearing 16 that supports the roll shaft 21a of the pipe making roller 21. Therefore, the introducing roller 50 is configured such that, even when the tube-making roller 21 rotates about one bearing 16, the tube-making roller 21
Move with. The roller shaft 51 is adapted to approach or separate from the pipe making roller 21 by rotating an adjusting bolt 54 disposed on the side thereof.

An introduction guide plate 60 is attached to the roller mount 15, and a strip-shaped body is introduced along the introduction guide plate 60.
It is introduced into the gap between the pipe making roller 21 and the pipe making roller 21. A pair of pinch rollers 61 is provided at the end of the introduction guide plate 60 extending upward.
And 62 (see FIG. 1) are provided. One of the pinch rollers 61 is rotationally driven by a motor 63, and the belt-shaped body is nipped by both rollers 61 and 62 and conveyed to the introduction roller 50. The introduction roller 50 is rotated in synchronization with the pinch roller 61 by a chain (not shown).

As shown in FIGS. 2 and 8, one end portion of four chain rollers 30, 30, ... Is fixed to the lower surface of the roller mount 15 located below the lower pipe-making roller 21. Therefore, the end of each chain roller 30 moves together with the roller mount 15 (and hence the pipe making roller 21). The other end of each chain roller 30 is locked by each locking member 46 arranged on each roller member 41 of the above-mentioned receiving roller 40. Each chain roller
30 is locked to each locking member 46 so as to have a length that can be fitted on the half circumference of the spiral tube to be manufactured and in a spiral shape corresponding to the spiral state of the spiral tube. Each chain roller 30 locked by each locking member 46 forms a semi-cylindrical space that matches the semi-cylindrical space formed by each pipe-making roller 21-26. Each of the chain rollers 30 has rolls 31, 31, ... That project freely toward the inner circumference.

A chain retainer 32 is attached to the center of the lower front frame 10b of the frame body 10 as shown in FIGS. The chain retainer 32 has a connecting rod whose upper end is attached so as to be movable in the vertical direction with respect to the frame 10b.
32a and a locking member 32 attached to the lower end of the connecting rod 32a
with b and. The locking member 32b extends to the lower side of each of the pipe-making rollers 21 to 26, and its tip end is locked to the lower end of the chain roller 30 located at the rearmost end in the pipe-making direction. Thus, it is more preferable to lock not only the chain roller 30 located at the rearmost position but all the chain rollers 30 at the same time.

In the case where the strip-shaped body is manufactured into a spiral tube by the pipe manufacturing machine of the present invention, when the strip-shaped body end portion is spirally wound, the end portion is smoothly propelled in an arc shape. When winding the tip portion, for example, a chain roller support 70 shown by a chain double-dashed line in FIGS. 1 and 2 is used. Even when the pipe making machine of the present invention is used in a manhole, the chain roller support 70 is used to wind the tip end of the belt-shaped body on the ground in advance, and then the pipe making machine is placed in the manhole. Used by being attached to.

The chain roller support body 70 is a rectangular parallelepiped frame body 71, and a plurality of frame rollers 71 supported by the frame body 71 and abutting on the outer peripheral surface of each chain roller 30 to support the chain roller 30. Support rods 72, 72 ,. Each support rod 72 is a frame 70
Is supported in a cantilevered manner by a bracket 73 disposed on the front surface of the support rods, and adjacent support rods are disposed at a predetermined distance in the circumferential direction. Each support rod 72 is movable in the radial direction.

When manufacturing a spiral pipe over a predetermined length on the ground by using the chain roller support 70 and the pipe manufacturing machine of the present invention, first, the pipe manufacturing rollers 21 to 26 and the receiving roller 40 are manufactured. Move it according to the outer diameter of the spiral tube. Large diameter pipe forming rollers 21 and 22 and receiving roller
The 40 is moved by rotating the screw shafts 12a, 12b, 12c, respectively, and moving the guide blocks 14a, 14b, 14c along the guide shafts 13a, 13b, 13c. The tube-making rollers 21 and 22 and the receiving roller 40 form a semi-cylindrical space having a diameter equal to the outer diameter of the spiral tube to be manufactured.
Next, the pipe-making rollers 23 to 26 having a small diameter are connected to the pipe-making rollers 21 and 2.
It is arranged along the semi-cylindrical space formed by 2 and the receiving roller 40. Then, the bolt 19c is rotated so that the large diameter pipe forming roller 21 has a predetermined spiral angle. Similarly, the other pipe-making roller 22 has a predetermined spiral angle.

On the other hand, the end of each chain roller 30 is
Each of the receiving rollers 40 has a length such that a semi-cylindrical lower space having substantially the same radius as the upper space can be formed below the semi-cylindrical upper space formed by. Stop member 46
Lock on. Further, the roller members 41, 41, ... That are fitted onto the roller shaft 42 of the receiving roller 40 are moved in the axial direction, and each chain roller 30 is wound at the helix angle of the pipe making rollers 21 and 22. A spiral state similar to the spiral state of the strip is set. As a result, each chain roller 30 is suspended by its own weight.

In this state, the pipe manufacturing machine of the present invention is placed on the chain roller support 70 as shown in FIG.
Insertion guide plate 60 sandwiched by pinch rollers 61 and 62
The sheet is conveyed along with and is introduced between the introducing roller 50 and the pipe making roller 21. The introduced strip is propelled by the rotation of the introduction roller 50 so as to be orthogonal to the spiral angle formed by the pipe-making roller 21, and rolls to the roll 31 of each chain roller 30. Chain roller 30 supported by each support rod 72
Spreads in a semi-cylindrical shape when the tip of the strip comes into contact. The belt-shaped body is propelled along the chain roller 30 that is erected, but when the chain roller 30 becomes a semi-cylindrical shape, it becomes a predetermined spiral state, so the belt-shaped body is a chain roller.
It is promoted in the same spiral state as 30.

The tip end of the belt-like body rolls from the chain roller 30 to each spherical roll 26b of the small diameter pipe-making roller 26. At this time, the belt-shaped body is in a predetermined spiral state and each spherical roll 26 of the pipe-making roller 26.
Since it rolls on b, each spherical roll 26b is tilted so as to have a predetermined spiral angle. The belt-shaped body further rolls on the tube-making roller 25, and each spherical roll of the tube-making roller 25 also tilts. Next, the belt-like body rolls on the pipe-making roller 22 having a predetermined spiral angle, then rolls on the pipe-making rollers 24 and 23 having spherical rolls, and is introduced again into the gap between the introducing roller and the pipe-making roller 21. . The leading end of the strip-shaped body introduced into this gap is made into a spiral tube by engaging adjacent strips that are newly introduced into the gap with adjacent widths.

When the spiral tube having a predetermined length is formed in this manner, the pipe manufacturing machine of the present invention is detached from the chain roller support 70 and mounted in the manhole for use. The pipe making machine is placed on an invert in a manhole, and each semi-circular chain roller 30 is fitted in a groove on the upper surface of the invert to form a spiral pipe formed over a predetermined length in the pipe making machine. Each leg 10c is adjusted so that the axial center of the and the axial center of the sewer pipe into which the manufactured spiral pipe is to be inserted are aligned. Then, with the axial center of the spiral pipe and the axial center of the sewer pipes aligned, the strip is propelled again. As a result, the pipe manufacturing machine manufactures the spiral pipe as described above. The manufactured spiral pipe is sequentially inserted into the sewer pipe.

In the above-mentioned embodiment, the chain roller is used as the pipe-making zone, but the present invention is not limited to this, and a flexible belt-like material such as a mild steel plate or a spring steel plate may be used. When such a belt-like material is used, a hemispherical projection or the like may be formed on the contact surface so that the abutting belt-shaped body can be smoothly propelled.

(Effect of the Invention) As described above, the pipe making machine of the present invention is configured such that the portion corresponding to half the circumference of the spiral pipe is spirally wound in the flexible pipe making zone. The pipe strip may have a length corresponding to half the circumference thereof to support each end portion, and therefore, it is not necessary to dispose rollers or the like outside the pipe pipe strip. Therefore, since the pipe strip is securely fitted in the groove portion of the invert, the spiral pipe can be manufactured without breaking the invert in the manhole having the invert. Since the pipe tube is used, the diameter of the spiral pipe to be manufactured can be changed only by changing the supporting end position.

[Brief description of drawings]

FIG. 1 is a partially broken front view showing an example of the pipe manufacturing machine of the present invention,
2 is a side view thereof, FIG. 3 is a cross-sectional view of a main part, FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 1, and FIG. 5 is a side view seen from the direction of arrow A in FIG. 6 is a sectional view taken along the line VI-VI of FIG. 1, FIG. 7 is a sectional view taken along the line VII-VII of FIG. 1, and FIG. 8 is an enlarged view of the main part. 10 …… Frame, 21 to 26 …… Pipe making roller, 30 …… Chain roller, 40 …… Receiving roller, 50 …… Introducing roller, 60 …… Introducing guide plate.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuo Fujiki 27, Minamitsuda-cho, Omihachiman City, Shiga Prefecture (72) Inventor Kenichi Morikawa 2313, Ryuhoushi, Konan Town, Koga-gun, Shiga Prefecture (72) Inventor Shigenobu Honmura, Osaka Prefecture Hirakata City Himurodai 1-44-18

Claims (2)

[Claims] 1. A pipe manufacturing method for forcibly bending a strip-shaped body in a spiral shape and engaging adjacent widthwise side portions of the strip-shaped body with a subsequent strip-shaped body to manufacture a spiral pipe. Machine, arranged along the upper half of the spiral tube to be manufactured,
A plurality of pipe-making rollers forming a semi-cylindrical upper space, and a semi-cylindrical lower portion having substantially the same radius as the upper space below the semi-cylindrical upper space formed by the pipe-making rollers. The flexible pipe-making zone arranged so that a space can be formed, and the pipe-forming body at the introduction portion of the strip-shaped body introduced into the cylindrical space formed by the pipe-making zone and each pipe-making roller. An introduction roller which is disposed so as to face the roller with a gap therebetween and is rotatable, and a strip-shaped body is introduced into the cylindrical space from the gap between the pipe-making roller and the introduction roller, A pipe-making machine adapted to bring the strip-shaped body into contact with the inner surfaces of the pipe-making strip and the pipe-making rollers. 2. The pipe making machine according to claim 1, wherein the pipe making belt is a chain roller.