JPS6349420A - Pipe manufacture machine - Google Patents

Abstract

PURPOSE:To obtain a pipe manufacturing machine which is capable of fitting in side parts of a beltlike material adjoining to each other easily, by providing the title machine with a plurality of pipe manufacturing rollers, and a locking ring for pressing fitting parts and connecting parts of the side parts each which fit in at least one pipe manufacturing roller, and overlap each other in the case where the beltlike material is wound round the pipe manufacturing rollers. CONSTITUTION:When the whole of a beltlike material 90 is moved forward and the tip part of the beltlike material 90 arrives at a pipe manufacturing roller 30 adjoining to the lowest side pipe manufacturing roller 30, a locking ring 35 fitted to the pipe manufacturing roller 30 is fitted in a space between a fitting rib 96 and connecting part 92a. Thereby, the tip of the mating rib 96 is pressed by the locking ring 35 and connected with the connecting part 92a. When the succeeding beltlike materials are introduced into a cylindrical space in order, along with fitting of a side part 91a in a fitting step 94, a fitting protruding line 93 is fitted in the inside of a fitting recessed groove 95, and the tip of the fitting rib 96 is connected with the connecting part 92a through the locking ring 35. Then the side parts in the widthwise directions of the beltlike material are mated firmly to each other, the beltlike material is wound round spirally into a spiral pipe having a predetermined bore.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pipe making machine that manufactures a spiral pipe of a predetermined diameter by spirally winding a band-shaped body made of, for example, a synthetic resin.

(Prior art) When manufacturing a synthetic resin tube, two strips are spirally wound, and adjacent widthwise sides of the one-wound strip are fitted or glued together. A pipe making machine for manufacturing spiral pipes is disclosed, for example, in Japanese Patent Application Laid-Open No. 55-61434.

Such a pipe making machine can continuously manufacture pipes in a narrow space, and is therefore suitable for use in manufacturing internal tubes for lining the inner peripheral surface of sewer pipes. In other words, since it is not possible to carry a long internal tube into a sewer pipe, in such cases, such a pipe making machine is installed in the manhole that connects the ends of the sewer pipe, and the pipe making machine is If the helical tube is continuously manufactured into the drain pipe by the machine, the inner tube can be inserted into the drain pipe.

A pipe-making machine for spiral pipes arranges multiple pipe-making rollers in a cylindrical shape, introduces a strip into the cylindrical space formed by each tube-making roller, and inserts the introduced strip into each pipe-making roller. Roll it around a roller and wind it in a spiral. Each of the tube-making rollers is disposed at a predetermined helical angle so as to be able to spirally wind the strip, and the strip is brought into contact with the tube-making roller perpendicularly to each other.

In the above-mentioned Japanese Unexamined Patent Publication No. 55-61434, the spirally wound strip weighs 1 g.

It has ribs and grooves that can engage with each other. When such a band-shaped body is spirally wound by a pipe-making machine, the ribs and grooves are engaged with each other. However, in order to ensure that the ribs and grooves are firmly engaged and do not easily separate, the ribs and grooves have complex structures. If the structures of both are complicated, it will be difficult to hold them together using a pipe making machine.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems, and its purpose is to easily connect adjacent sides of a spirally wound band-like body to each other. The purpose of the present invention is to provide a pipe making machine that can be used in combination.

(Means for Solving the Problems) The pipe making machine of the present invention has a retaining part that can engage with each other when the respective side parts in the width direction that are adjacent to each other are overlapped with each other by winding the pipe in a spiral shape. This is a pipe making machine that manufactures a spiral tube by spirally winding a band-shaped body having a locking part on each side in the width direction, and the belt-like body is arranged in a cylindrical shape with a predetermined helical angle, and A plurality of pipe-making rollers are wound into a spiral shape by rolling the belt-shaped body into contact with each other.

A locking ring that is fitted to at least one tube-making roller and presses against engaging portions and locking portions on each side that overlap when the band-shaped body is wound spirally.

The above object is thereby achieved.

(Example) The present invention will be described below with reference to Examples.

The pipe making machine of the present invention continuously winds a belt-shaped body made of, for example, a synthetic resin in a spiral shape, and engages adjacent widthwise side parts of the spirally-wound belt-shaped body with each other. By doing so, a spiral tube is manufactured continuously.

The pipe making machine 9 has, for example, as shown in FIGS. 1 and 2,
It has a rectangular parallelepiped-shaped frame 10 and a pair of annular frames 21 and 22. Square frames 11 and 12 are formed on each opposing surface of the frame body 10, and four brackets 13 are provided at each corner of each square frame 11 and 12.
．． 13. ...and 14.14. ...is arranged. Each bracket 13 and 14 has an arcuate long hole 13.
a and 14a have been opened, respectively.

The annular frames 21 and 22 are arranged on the inner surface of each of the square frames 1 and 12 so as to be concentric with each of the square frames 11 and 12. On the outer surface of each annular frame 21 and 22, four pins 23, 23. ...and 24
, 24. ... are planted respectively, and each pin 23
and 24 are the elongated holes 13 of each bracket 13 and 14.
A and 14a are slidably engaged with each other, and the second extraction is prevented. Therefore, each annular frame 21 and 22
In each square frame 11 and 12, long holes 13a and 1 are formed.
It is attached to the frame 10 so that it can rotate by the length of 4a.

An annular frame 2 is provided on the upper outer surface of one square frame 11.
A hydraulic cylinder 41, which is the rotational drive means 1, is installed obliquely. Rod 41a of the hydraulic cylinder 41
The tip is attached to one pin 23 on the top of an annular frame 21 attached to the square frame 11. Therefore, the annular frame 21 is rotated by advancing and retracting the rod 41a of the hydraulic cylinder 41. A hydraulic cylinder 42 serving as rotational driving means for the annular frame 22 is also attached to the upper outer surface of the other square frame 12 so as to be inclined in the opposite direction to the hydraulic cylinder 41 . The tip of the rod 42a of the hydraulic cylinder 42 is connected to the square frame 1.
It is attached to one pin 24 of the upper part of the annular frame 22 attached to 2. The pin 24 is located diagonally to the pin 23 to which the tip of the rod 41a of the hydraulic cylinder 4I is attached. Each hydraulic cylinder 41 and 42 is equally driven by one, for example one hydraulic system. In other words, when the rod 41a (or 42a) of one hydraulic cylinder 41 (or 42) is advanced (or retracted), the rod 42a (or 41a) of the other hydraulic cylinder 42 (or 41) is moved by the amount of advance (or retraction). To be advanced (or entered). Therefore, each of the annular frames 21 and 22 is rotated by the same amount in opposite directions by the driving of the hydraulic cylinders 41 and 42.

Although not shown, it is also possible to rotate only one annular frame by providing a bypass in the hydraulic circuit. Each hydraulic cylinder 41 and 42 is driven by a handle 43 attached to the frame 10.

Each annular frame 21 and 22 has 20 supporting rods 25.25.・9. and 26.26
．． , , are arranged radially. Each of the support rods 25 and 26 is attached to the annular frames 21 and 22 so as to be movable in the radial direction. The support rods 25 and 26 are arranged so as to face each other when the annular frames 21 and 22 are located at the starting point of their rotation ranges. A swivel bearing 27 is attached to the center end of each support rod 25 disposed on one annular frame 21 . The swivel bearing 27 supports the supported shaft so that it can rotate even when the shaft is rotated. For example, a spherical bearing is used. Each support provided on the other annular frame 22 Similar swivel bearings 28 are also provided at the center-side ends of the rods 26, respectively.

Each swivel bearing 27 has pipe making rollers 30, 30. . . . and 30' . The end portions of the fitted roller shafts are restricted from moving in the axial direction. The other end of each roller shaft is engaged with a universal bearing 28 disposed opposite to each universal bearing 27, either directly or via a crankshaft 34, which will be described later. Therefore, each tube making roller 30 and 30
° are arranged in a cylindrical shape. The end of each roller shaft that is fitted into the swivel bearing 28.

Alternatively, the end of the crankshaft 34 is movable in the axial direction relative to the universal bearing 28.

Therefore, when the respective hydraulic cylinders 41 and 42 are driven, the annular frames 21 and 22 are rotated in opposite directions, and the helical angle of each tube making roller 30 and 30 degrees is changed.

As shown in FIGS. 3 and 4, one end of an introduction guide 50 is attached to the tube-making roller 30 located at the bottom. The introduction guide 50 has a guide plate 50a on the upper surface of which the belt-shaped body is conveyed, and side walls 50b and 5 that stand up on each side of the guide plate 50a in the width direction.
0e. One side wall portion 50e includes a guide plate 50
It does not reach the end part a on the pipe making roller 30 side. Below this end of the guide plate 50a, a bracket l-50d which is U-shaped in plan view and extends toward the tip side is arranged. 50
It is installed between d. The entire introduction guide 50 is mounted so that its axis is perpendicular to the roller shaft 31. Therefore, even if the helical angle of the tube making roller 30 is changed by the rotation of the annular frames 21 and 22, the axis of the introduction guide 50 is always perpendicular to the tube making roller 30. Therefore, the tube making roller 30 has each side wall portion 50b
and 50c so that its upper surface is approximately at the same height as the upper surface of guide plate 50a.

The strip-shaped body is conveyed on the guide plate 50a so as to be in sliding contact with one side wall portion 50e.

At this end of the introduction guide 50, a plastic plate 50c is attached. The bracket 50C extends outward in the width direction, and its extending end is bent upward.

Two introducing rollers 60 made of, for example, hard synthetic rubber are disposed on the bracket 50C in a cantilevered manner parallel to the tube-making roller 30 at a position above the bottom tube-making roller 30. has been done.

The introduction roller 60 is movable in the vertical direction.

A sprocket 6 is attached to the roller shaft 60a of the introduction roller 60.
2 is fitted. The sprocket 62 is rotationally driven by a chain 63, which will be described later, and the introduction roller 60 is rotated together with the sprocket 62.

A predetermined gap is formed between the introducing roller 60 and the lowermost tube-making roller 30, and the strip is sandwiched between the two rollers 60 and 30 and introduced into this gap. The introduction roller 60 and the lowermost tube-making roller 30 introduce the strip into the cylindrical space formed by each tube-making roller 30 and 30'. - The tip of the strip that has been introduced into the cylindrical space is then introduced into the cylindrical space again from within the gap between the introduction roller 60 and the lowermost tube-making roller 30.

Three pipe-making rollers 30°, 30', 30' adjacent to the lowermost pipe-making roller 30 on the side opposite to the direction in which the strip is introduced by the introduction guide are connected to the introduction guide 50.
It is shorter than other tube making rollers so that it does not come into contact with the tube. Each pipe making roller 30' has its roller shaft 31'
is fitted directly into the swivel bearing 27 at one end, while the crankshaft 34.34.34. are attached to one end of each. Each crankshaft 34 is bent in a U-shape so as to be able to pass under the introduction guide 50, and the other end of each crankshaft 34 is attached to a universal bearing 28 opposite to each universal bearing 27 into which one end of the crankshaft 7 is fitted. They fit together. Therefore, by rotating the five annular frames 21 and 22, the helical angle of each tube making roller 30'' is changed via the crankshaft 34.

A drive roller 51 and a pinch roller 52 are attached to the outwardly extending end of the introduction guide 50, as shown in FIGS. 5 and 6. The drive roller 51 is disposed above the 7-introduction guide 50 so that its axis is perpendicular to the moving direction of the strip.

The pinch roller 52 is disposed below the drive roller 51, parallel to the drive roller 51, and movable in the vertical direction. A predetermined gap is formed between the drive roller 51 and the pinch roller 52, and the belt-shaped body is introduced into the gap.The drive roller 51 is rotated by a hydraulic motor 53. The strip introduced into the gap between the drive roller 51 and the pinch roller 52 is held between the two rollers 51 and 52, and as the drive roller 51 is rotated by the hydraulic motor 53, the strip is rotated at the rotational speed of the drive roller 51. At this point, the tube is conveyed on the guide plate 50a toward the tube-making roller 30 side. The hydraulic motor 53 is driven by a hydraulic pump 54 (see FIGS. 1 and 2) disposed at the bottom of the frame 10.

On the downstream side of the drive roller 5 in the direction in which the strip is introduced, an adhesive application device 70 is disposed to apply an adhesive to one widthwise side of the strip to be introduced.

A sprocket 61 is attached to the end of the roller shaft 51a of the drive roller 51, and the drive roller 51 rotates together with the sprocket 61. A chain 63 is wound around the sprocket 61.
is also wound around a sprocket 62 attached to the roller shaft 60a of the introduction roller 60 mentioned above. Therefore, the rotation of the drive roller 51 rotated by the hydraulic motor 53 is transmitted to the introduction roller 60 through the chain 63, and the introduction roller 60 is driven to rotate at the same speed as the drive roller 51. Since the rotation of the drive roller 51 is transmitted to the introduction roller 60 via the chain 63, the introduction roller 60 rotates in synchronization with the drive roller 51.

A drive roller 51 and a pinch roller 52 attached to the introduction guide 50 are attached to the lower end of the connecting rod 55. The upper part of the connecting rod 55 is attached to one end of a support arm 56, as shown in FIGS. 1 and 2. An adjustment handle 58 for moving the connecting rod 55 in the vertical direction is attached to the upper part of the connecting rod 55. The end of the support arm 56 to which the connecting rod 55 is attached is substantially horizontal.

The portion connected to the end portion is bent upward along the frame 10, and the upper portion thereof is further bent approximately horizontally along the upper surface of the frame 10. The other end of the support arm 56 is rotatably supported by a pin 59 on the upper surface of the frame 10. Further, at the bent side end of the substantially horizontal portion of the support arm 56 along the upper surface of the frame body 10, a pair of bumps 5 are provided.
7.57 is rotatably arranged, and each roller 57 and 57 rolls into contact with the upper surface of the frame 10.

The introduction guide 50 rotates so as to be always perpendicular to the lowermost pipe-making roller 30 as the helical angles of all the pipe-making rollers 30 change due to the rotation of the annular frames 21 and 22. Since the outwardly extending end of the guide 50 is rotatably supported in the horizontal plane by the support arm 56, etc., the introduction guide 50 is rotated when the helical angle of each tube making roller is changed. The rotation is performed smoothly.

The pipe making machine of the present invention manufactures a helical pipe using, for example, a strip 90 having a cross-sectional structure as shown in FIG. The band-shaped body 90 includes a sheet portion 91 having a smooth surface, and protrusions 92.92. ...has... Each protrusion 92 has a T-shaped cross section. A fitting protrusion 93 having a spherical tip is disposed on the back surface of one side in the width direction of the seat portion 91 in parallel with each protrusion 92 . The tip of the protrusion 92 adjacent to the fitting protrusion 93 is.

A locking portion 92a bent toward the fitting protrusion 93 is formed. The other side in the width direction of the seat portion 91 is provided with a fitting protrusion 9
3 to form an engagement step 94 that can engage one side 91a of the seat portion 91 on which the number 3 is formed.

It is located on the back side by the thickness of the seat portion 91.

A fitting groove 95 bent toward the back side is formed in this portion so that a fitting protrusion 93 formed on one side can fit therein. In the bent portion where the fitting groove 95 is formed,
A protrusion 95a having a T-shaped cross section and protruding toward the back side is provided. Engagement ribs 96 are formed on the widthwise side edges of the sheet portion 91 forming the fitting opening/#95, and extend while being inclined toward the back side. The tip of the engagement rib 96 fits into the fitting protrusion 93 when the band 90 is wound spirally and the adjacent fitting protrusion 93 is fitted into the fitting groove 95. It can be locked to the bent locking part 92a of the adjacent engagement protrusion 92.

In the pipe making machine of the present invention, as shown in FIG. ing. As shown in FIG. 8, the locking ring 35 fits between the engagement rib 96 of the band-shaped body 90 and the protrusion 95a adjacent to the engagement rib 96, and It has diameter and width dimensions that allow it to be pressed toward the surface side, that is, toward the radial center of the helical tube that is being formed.

The tube-making roller 30 to which the locking ring 35 is fitted is the lowermost tube-making roller 3o.

The rollers are not limited to those adjacent to each other in the direction of movement of the strip, and may be any tube-making rollers that are closer to the direction of movement of the strip than the lowermost tube-making roller 30.

The operation of the pipe making machine of the present invention is as follows.

When introducing the strip, each annular frame 21 and 22 and all support rods 25 and 26 disposed on each annular frame 21 and 22 are installed in accordance with the diameter of the spiral tube to be manufactured and the width of the strip. Adjust. All support rods 25 and 26 are moved in the radial direction of the annular frames 21 and 22 in accordance with the diameter of the helical tube to be manufactured. Each support rod 25 and 26 is then Bearings 27 and 2 at the center side tips of rods 25 and 26
8 is located on a circumference concentric with the annular frames 21 and 22.

At this time, by adjusting the lowermost support rods 25 and 26, the lowermost tube making roller 30 is moved in the vertical direction, and as the lowermost tube making roller 30 moves, the introducing roller 60
And the introduction guide 50 also moves. The introduction guide 50 is
The outer end portion is moved vertically using the adjustment handle 58 to make it horizontal.

Next, when the strip 90 is wound spirally.

Adjacent to the fitting protrusion 93 on one side of the wound band-like body 90 and the fitting groove 95 on the other side of the band-like body and the engagement rib 96 on one side. All the tube making rollers 30 and 30'' are set at a predetermined helical angle so that they engage with the locking portion 92a on the other side of the strip.The helical angle of each tube making roller 30 and 30'' is The annular frames 21 and 22 are rotated by rotating the handle 43 attached to the body 10.
This is done by rotating the .

The rods 41a and 42a of the hydraulic cylinders 41 and 42 advance by rotating the handle 43, and therefore both rods 41a and 42a advance by the same amount. As a result, each of the annular frames 21 and 22 rotates by an equal amount in opposite directions. The ends of all the tube making rollers 30 and 30° are rotated in opposite directions, so that all the tube making rollers 30 and 30 are rotated.

A predetermined helical angle.

When the lowermost pipe-making roller 30 reaches a predetermined helical angle.

The introduction guide 50, which is attached to the tube-making roller 30 so that its axis is perpendicular to the pipe-making roller 30, swings left and right in a horizontal plane.

This deflection is made smooth because a pair of rollers 57 and 57 are interposed between the support arm 56 and the upper surface of the frame 10.

Next, a strip 90 having a cross section shown in FIG. 7, for example, is introduced into the introduction guide 50 with the smooth surface facing upward, and the strip 90
pass. Further, the end of the strip 90 is passed between the lowermost tube-making roller 30 and the introduction roller 60. At this time,
The pressure applied to the strip 90 is adjusted by adjusting the vertical positions of the pinch roller 52 and the introduction roller 60. Further, the adhesive applicator 70 is adjusted so that the adhesive is applied to the fitting groove 95 of the strip 90.

In this state, the hydraulic motor 53 is driven to rotate the drive roller 51. As a result, the introduction roller 60
Power is also transmitted to the chain 63.

The introduction roller 60 is also rotationally driven in synchronization with the drive roller 5. Then, the introduction roller 60 and the lowermost pipe-making roller 30
and the belt-shaped body held between the drive roller 51 and the pinch roller 52 at a predetermined speed.

All of the pipe making rollers 30 and 30' are introduced into a cylindrical space formed by the pipe forming rollers 30 and 30'. Adhesive is applied inside the fitting groove 95 of the belt-shaped body 90 to be introduced. Introduced strip 9
0 is forcibly bent by rolling into contact with each tube-making roller 30 and 30'', and is spirally wound at a helical angle formed by each tube-making roller 30 and 30''.

When the tip of the strip 90 goes around one cylindrical space,
The tip portion is again introduced between the lowermost pipe-making roller 30 and the introduction roller. At this time, a subsequent band-shaped body is newly introduced into the cylindrical space formed by all the pipe-making rollers 30 and 30', and one side in the width direction of this band-shaped body 90 is It overlaps the widthwise side portion of the tip of the strip 90. 9, the overlapping sides are pressed by the introduction roller 60 and the lowermost tube making roller 30, as shown in FIG.
However, the engagement step 94 of the newly introduced subsequent band-shaped body 90
At the same time, the engagement protrusion 9 at the tip of the strip body 90
3 is.

The newly introduced subsequent strip 90 is fitted into the fitting groove 95 coated with adhesive. in this case.

The distal end of the engagement rib 96 of the newly introduced subsequent strip 90 is difficult to be locked by the locking portion 92a of the distal strip 90 that has made three turns.

This is because the opening of the engagement groove 95 is pushed wider by the engagement protrusion 93 coming into contact with the engagement groove 95.
This is because it is difficult for a pressing force to act on the tip of the engagement rib 96.

Therefore, the side portion 91a and the engagement step 94. With the engagement protrusion 93 and the engagement groove 95 engaged, the entire strip 90 moves forward, and the tip of the strip 90 touches the tube making roller 30 adjacent to the lowermost tube making roller 30. When the department reaches.

A locking ring 35 fitted to the pipe making roller 30.

It is fitted between the engagement rib 96 and the cough locking portion 92a.

As a result, the tip of the engagement rib 96 is connected to the locking ring 35.
is pressed and locked into the locking portion 92a.

In this state, the drive roller 51 is driven to rotate to advance the strip 90, and the subsequent strips are sequentially introduced into the cylindrical space formed by all the pipe forming rollers 30 and 30''. As described above, the introduction roller 60 and the lowermost tube making roller 30 move the side portion 91a and the engagement step 9.
4 are engaged, and the engagement protrusion 93 is fitted into the fitting groove 95.
The tip of the engagement rib 96 is locked to the locking portion 92a by a locking ring 35 that is fitted inside the pipe-making roller 30 and fitted externally to the pipe-making roller 30 adjacent to the pipe-making roller 30. The locking ring 35 is slidable on the tube-making roller 30, but once it is fitted between the engagement rib 96 of the band-shaped body 90 and the protrusion 95a, there is no risk of it coming off from there.

Thereafter, the band-like body is wound spirally with its widthwise side portions firmly engaged with each other to form a helical tube having a predetermined diameter.

(Effects of the Invention) In the pipe making machine of the present invention, the locking ring that presses the engaging rib and the locking portion on each side that are spirally wound and overlapped is attached to the pipe making roller. Since they are externally fitted, the engaging rib and the engaging portion are reliably engaged.

4. Figure 1 is a partially cutaway front view of a pipe making machine showing an example of the present invention.
Fig. 2 is a side view, Fig. 3 is a partially cut-away plan view showing the area around the lowest roller, Fig. 4 is a side view, and Fig. 5 is a partially cut-away plane view showing the area around the drive roller. Fig. 6 is a side view thereof, Fig. 7 is a sectional view showing an example of the band-shaped body, Fig. 8 is an explanatory diagram of the operation of the locking ring, and Fig. 9 is an illustration of the introduction roller and the lowermost tube-making roller. It is an operation explanatory diagram.

10... Frame body, 21.22... Annular frame,
25.26...Support rod, 27...Swivel bearing, 28.
・・Bearing, 30.30' ・・Pipe making roller, 35・
...Lock ring, 4142...Hydraulic cylinder,
50... Grooved guide, 50a... Guide plate, 51.
... Drive roller, 52 ... Pinch roller, 53 ...
hydraulic motor.

60...Introduction roller, 61.62...Sprocket, 63...Chain, 90...Band-shaped body, 92a.
...Engagement rib.

that's all

Claims (1)

[Claims] 1. An engaging portion and a locking portion that can be engaged with each other when the adjacent side portions in the width direction are overlapped with each other in a spiral manner are provided on each side in the width direction. This is a pipe making machine that manufactures a spiral tube by winding strips each having a helical shape in a helical shape. a plurality of tube-making rollers to be wound; and a plurality of tube-making rollers that are fitted to at least one tube-making roller and press against engaging portions and locking portions on each side that overlap when the band-shaped body is wound in a spiral shape. A pipe making machine equipped with a locking ring and.