JPH0673703B2 - Synchronous drive mechanism in hydraulic drive pipe making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention (1) Field of Industrial Application The present invention relates to a pipe manufacturing machine for spirally winding a strip-shaped member to form a pipe, and more specifically, to a strip-shaped machine with hydraulic drive. The present invention relates to a so-called pressureless driving type pipe manufacturing machine that performs feed driving, joining driving, and rotational driving of members. Further, in particular, a pipe manufacturing machine for a lining used for loading a lining pipe into an existing pipe is also an application field of the present invention.

(2) Conventional Technology Generally, a so-called spiral winding type pipe manufacturing machine for spirally winding a strip-shaped member to manufacture a pipe is continuously manufactured by receiving an extrusion force in a process of manufacturing the manufactured pipe. Since it is a thing, it suffices to place the pipe making machine only in a certain place, and it is economical because it does not take up a lot of space.

However, the spiral winding type pipe making machine is generally used in a factory, the machine body frame is made rigid, and no special consideration is given to changes in the pipe diameter. It was used by preparing another pipe manufacturing machine.

Therefore, in such a pipe making machine, not only one type of pipe cannot manufacture pipes having various pipe diameters, but also when this pipe is placed on-site for lining underground pipes, There are various inconveniences in that it is not possible to cope with various kinds of pipe diameters and also to set a central axis for the underground buried pipe.

In addition, when lining the underground pipe, the load fluctuation due to friction with the inserted lining pipe due to unevenness and bending in the underground pipe is also a big problem, and a uniform lining pipe is obtained. It is an obstacle.

(3) Technical Problem of the Present Invention The present invention has been made in view of the above circumstances, and it is possible to automatically adjust the driving force according to the change of the pipe diameter, and further, to the fluctuation of the load. It is an object (technical problem) to provide a pipe making machine capable of obtaining a pipe having a uniform diameter.

Therefore, the present invention achieves this object by adopting a hydraulic drive type pipe manufacturing machine and newly developing a synchronous drive mechanism in the hydraulic drive type pipe manufacturing machine by combining each component of the hydraulic circuit mechanism. It was done.

B. Configuration of the Invention (1) Means for Solving Problems The synchronous drive mechanism in the hydraulically driven pipe manufacturing machine of the present invention specifically adopts the following configuration (technical means).

That is, each of the pipe-making mechanism parts of the feed mechanism part, the joining mechanism part, the rotation mechanism part, and the guide mechanism part, which is provided with an outer surface roller and an inner surface roller, and which drives the narrow band-shaped member by sandwiching the inner and outer surface rollers. In a pipe manufacturing machine for pipe-making a lining pipe by spirally winding the strip-shaped member by a pipe-making mechanism part excluding these feeding mechanism parts, at least one of the guide mechanism parts and the other pipe-making mechanism parts The outer rollers are driven by independent hydraulic motors, and these hydraulic motors are operated by an electromagnetic proportional switching valve via a speed control unit that receives the rotational speed of each hydraulic motor as a detection signal and instructs synchronous rotation. Between the hydraulic motors of these pipe making mechanisms and their respective solenoid proportional switching valves, there is a pressure compensating valve that corresponds to the fluctuation pressure of the pressure oil to these hydraulic motors. Are instrumentation, hydraulic motor of the feed mechanism is characterized by comprising a vacuum driven.

(2) Action The continuously supplied belt-shaped member is passed between the outer surface roller and the inner surface roller of each of the pipe making mechanism parts of the feed mechanism part, the joining mechanism part, the guide mechanism part, and the rotation mechanism part to form a spiral shape. The tube is wound and the tube is manufactured.

Each hydraulic motor is synchronously rotated at a predetermined feed speed corresponding to the pipe diameter via an electromagnetic proportional control valve based on a command from the speed control unit.

The hydraulic motor of each pipe making mechanism is operated by the pressure compensating valve,
The constant rotation is compensated even for the pressure fluctuation due to the load fluctuation, and an accurate roundness is obtained.

Further, by depressurizing the hydraulic motor of the feed mechanism, the rotational torque of the hydraulic motor is reduced, and the tension on the belt-shaped member is adjusted.

(3) Embodiment Hereinafter, an embodiment of the hydraulic control device in the hydraulically driven pipe manufacturing machine of the present invention will be described with reference to the drawings.

1 to 8 show a hydraulically driven pipe manufacturing machine for a lining as one embodiment of the present invention (hereinafter simply referred to as "pipe manufacturing machine").
H is shown.

Band-shaped member 1 FIG. 9 shows a band-shaped member used in the present invention.

The strip-shaped member 1 has an appropriate number of trapezoidal ridges 2 in the longitudinal direction of the outer surface.
Are continuously provided vertically, and valleys 3 are formed between the ridges 2. The ridges 2 and the valleys 3 have the same pitch in the width direction.
A hollow portion is appropriately formed inside the ridge 2, so that the belt-shaped member can be made rigid and lightweight. The inner surface 4 is formed to be substantially smooth.

On both sides of the belt-shaped member 1, joint parts 5 and 6 are formed which overlap with each other and engage with each other. That is, the ridges of the outer joint portion 5 are formed in the same shape as the ridges 2, and a circular groove 5a is vertically provided on the inner surface thereof, and the overhanging portion 5b is slightly longer than the width of the valley portion 3. . The inner joint portion 6 has a projecting portion 6a having a length substantially longer than that of the valley portion 3, and the end portion of the projecting portion 6a is formed into a circular groove 5a of the outer joint portion 5. Shaped ridge 6b
Is provided vertically, and a notch groove 6c is provided vertically on the ridge 2 at the base thereof.

At the time of joining, the outer joint portion 5 is pressed against the inner joint portion 6 by the joining roller 41 (described later), so that the round convex groove is formed in the round concave groove 5a.
6b and the ends of the overhanging portions 5b are respectively fitted and joined to the cut groove 6c. Further, a welding roller 43 (described later) is pressed against the overlapping portion and welded by high frequency heat.

It is possible to adopt a mode of joining by an adhesive instead of the welding joining.

It is possible to obtain a joint having excellent waterproofness by welding or bonding at the joint.

If the fitting engagement of the joint portions 5 and 6 is sufficient, welding and bonding can be omitted.

The belt-shaped member is made of a synthetic resin material, and in particular, vinyl chloride (PVC) resin that can be continuously molded by extrusion forming is preferable from the viewpoint of moldability. However, it does not prevent the metal molding.

Pipe Maker H The detailed structure of the pipe maker H is shown in FIGS. 1 to 6.

The pipe making machine H is composed of a main body frame 10, a belt-shaped member feeding mechanism portion 20, a belt-shaped member joint portion joining mechanism portion 40, a pipe rotating mechanism portion 50, a lower guide mechanism portion 70, and a side guide mechanism portion 80.

Of these main parts, the mechanical parts 20, 40, 50, 70, 80 excluding the machine body frame 10 constitute a pipe manufacturing mechanism, and are collectively referred to as "pipe manufacturing mechanism".

The detailed configurations of these main parts will be described below.

Airframe Frame 10 Airframe frame (machine frame) 10 (see FIGS. 1 to 5) includes pillar members 11 standing upright at four corners, an upper beam 12 fixed around the pillar members 11, an upper movable beam 13, and a lower portion. It is composed of a movable beam 14 and a lower beam 15.

The length of the machine body frame 10 can be adjusted vertically and in the width direction, so that the machine frame can be freely adapted to the pipe diameter.

More specifically, the column member 11 is made of box-shaped steel and is composed of a front column 11A and a rear column 11B when viewed in the traveling direction of the pipe P.

The upper beam 12 is made of a channel steel in which the front and rear beams 12A open downward, and the side branch beam 12B connecting them is made of box steel.

In the upper movable beam 13, front and rear beams 13A are made of grooved steel having front and rear openings, and their central portions are connected by a connecting beam 13B made of two box-shaped steels.

The lower movable beam 14 has substantially the same configuration as the upper movable beam 13 described above. That is, the front and rear beams 14A are made of grooved steel that is open to the front and the rear, and are connected at the center thereof by two connecting beams 14B made of box-shaped steel.

The lower beam 15 has substantially the same configuration as the upper beam 12 described above. That is, the front and rear beams 15 are made of channel steel that opens upward, and the side beams 15B that connect them are made of box steel.

The machine body frame 10 has a function of supporting a pipe manufacturing mechanism (a feed mechanism unit and other pipe manufacturing mechanism units) described later, and holding each of the mechanism units according to the pipe diameter of the pipe P.

The column member 11 is variable in the width direction along the beam members 12, 13, 14, and 15. That is, the front and rear beam members 12, 13, 14, 15 are provided with a large number of adjusting bolt holes 12a, 13a, 14a, 15a in the longitudinal direction, and the column member 11 is widthwise along the bolt holes. Move and fix with bolts 16. Needless to say, the groove may be replaced with a groove formed in a discontinuous manner.

The upper movable beam 13 and the lower movable beam 14 are vertically variable along the column member 11. That is, a plurality of bolt holes 11a for adjustment are provided in the column member 11 in the vertical direction, the upper and lower movable beams 13 and 14 are moved in the vertical direction along the bolt holes, and fixed by bolts 17. To do. Similar to the beam member, the bolt hole 11a can be replaced with a groove. In the movable beams 13 and 14, the connecting beams 13B and 14B are connected to the front and rear beams 13 and 14 by bolts 18.
It is fixed so that it can move and adjust along A and 14A.

The lower beam 15 is placed on the base I.

The band-shaped member feeding mechanism section 20 includes a plurality of outer-surface feeding rollers 21 that are pressed against each other along the ridges 2 and the troughs 3 on the outer surface of the band-shaped member 1 (see FIGS. 1 to 4). It is composed of a plurality of inner surface feed rollers 22 that are pressed against the inner surface of the belt-shaped member 1. The inner surface feed roller 21 and the inner surface feed roller 22 are equipped with an outer surface bandage belt 23 and an inner surface bandage belt 24, which are made of rubber, respectively. Although a plurality of outer surface feed rollers 21 and inner surface feed rollers 22 are arranged in this embodiment, a single piece may be provided. Further, the outer and inner band belts 23, 24 may be omitted even if they are omitted. Reference numeral 25 is a hydraulic motor for driving the feed mechanism unit 20, which is connected to the hydraulic motor unit by a hydraulic hose.

Each of the rollers 21, 22 and the hydraulic motor 25 includes a front pillar 11A and a rear pillar 11
It is mounted on a pedestal 27 whose angle can be adjusted on a mounting plate 26 laid between B and B. The gantry 27 includes a back plate 27a facing the mounting plate 26, ribs 27b that support the shaft of the roller, and a shelf plate 27c that mounts and fixes the motor 25. Back plate 27a of frame 27
Is fixed to the mounting plate 26 by an angle adjusting mechanism (adjuster) 28 so that the angle can be adjusted.

The angle adjusting mechanism 28, as shown in FIG.
a threaded rod 28a protrudingly fixed to a, a groove 28b formed in the mounting plate 26 at a required angle to insert the threaded rod 28a, and a nut screwed with the threaded rod 28a to draw the back plate 27a toward the mounting plate 26. It consists of 28c. 28d is a washer. The angle adjusting mechanism is also provided in the joining mechanism section 40, the rotating mechanism section 50, and the guide mechanism sections 70 and 80 which will be described later, and the substantial mechanism thereof is the same as the angle adjusting mechanism 28 in the feed mechanism section 20.

Power drive in the belt-shaped member feeding mechanism section 20 is performed as follows. The small gear 30 attached to the drive shaft of the hydraulic motor 25 is a large gear 31 having a rotation shaft on the rib 27b of the mount 27.
Is rotated by a chain (not shown) to rotate the inner surface feed roller 22 coaxial with the large gear 31. Inner surface feed roller
The gears 22 have gears 32 on both sides and are connected to each other by a chain (not shown). Also, the outer surface feed roller
Each of 21 also has a gear 33, which is connected to each other by a chain (not shown) and is also connected to an appropriate gear 32 of the inner surface feed roller 22 to be rotated.

The power driving of the belt-shaped member feeding mechanism section 20 is not limited to the above, and only the outer surface feeding roller 21 may be power driven, and the inner surface roller 22 is simply brought into pressure contact with the belt-shaped member 1 and is rotated by following the friction. Good.

Further, when the outer surface and inner surface feed rollers 21 and 22 are single, the drive shaft of the hydraulic motor 25 is connected to the shaft of the outer surface feed roller 21, and the inner surface feed roller 22 is connected to the hydraulic motor unit for the hydraulic pressure for pressure contact. It is possible to adopt a mode in which a cylinder (for example, a pressure contact cylinder indicated by reference numeral 102 in FIG. 7) is pressed with a predetermined pressure.

Joining mechanism part 40 The band-like member joint joining mechanism part 40 (see FIGS. 1 and 4) is
Outer surface bonding roller 41, inner surface bonding roller 42, and welding roller 43
Consists of. A guide roller 44 is arranged inside the fusing roller 43.

The outer surface joining roller 41 and the inner surface joining roller 42 are both longer than the width of the belt-shaped member 1 by the amount corresponding to the joint, and are arranged on a horizontal line passing through the center of the pipe P. As a result, in the band-shaped member 1, the joint portions (the outer joint portion 5 and the inner joint portion 6) at the ends thereof are engaged with each other.

The fusing roller 43 is in contact with a power supply terminal (not shown), and the power supply terminal is connected to a power generator.

The rollers 41, 42, 43, 44, power terminals, and the like are mounted on a mount 46 that is adjustable in angle on a mounting plate 45 that spans the front pillar 11A and the rear pillar 11B. Frame 46 is plate 46a, rib 4
6b, the plate 46d and the mounting plate 45 and the angle adjustment mechanism 47
(The structure conforms to the angle adjusting mechanism 28 of the belt-shaped member feeding mechanism 20.). The inner surface joining roller 42 and the guide roller 44 are pivotally mounted so that their positions can be adjusted in the tube central axis direction, and the welding roller 43 is pivotally mounted so that their eccentric positions can be adjusted.

Tube Rotation Mechanism Section 50 The tube rotation mechanism section 50 (see FIG. 1, FIG. 2, and FIG. 3) is arranged on the upper part of the rear end of the completed tube P, and imparts rotational propulsive force to the tube P. To do.

The rotation mechanism section 50 includes a plurality of outer surface rotation rollers 51 and a plurality of inner surface rotation rollers 52. That is, the outer surface rotation roller 51
Has an uneven shape, and is pressed against the outer surface of the belt-shaped member 1 along the protrusions and the valleys 3, and the inner surface rotation roller 52 is pressed against the inner surface of the belt-shaped member 1. The outer surface rotating roller 51 and the inner surface rotating roller 52 are respectively provided with an outer surface rotating bandage belt 53 and an inner surface banding belt 54, which are made of rubber, to obtain a uniform rotational force to the pipe P. In this embodiment, the outer surface rotation roller 51
Also, a plurality of inner surface rotation rollers 52 are provided, but a single piece may be provided. Also, the outer and inner bandage belts 53, 54
Can be omitted. Reference numeral 55 denotes a hydraulic motor for driving the rotating mechanism 50, which is connected to the hydraulic motor unit by a hydraulic hose.

As shown in the drawing, the rotating mechanism section 50 is arranged so as to be inclined with respect to the axis of the pipe P to be produced, and the uneven portion of the outer surface rotating roller 51 and the ridges 2 and valleys 3 of the strip-shaped member 1 are arranged. By fitting with, a rotational force is applied to the pipe P, and a thrust force of the pipe P in the pipe axis direction is generated. Not only the rotating mechanism 50, but also the outer rollers of the other pipe making mechanisms 40, 70, 80 are inclined with respect to the axis of the pipe P, and thus contribute to the thrust as well. .

The rollers 51, 52 and the hydraulic motor 55 are mounted on a pedestal 57 that is arranged so that the angle can be adjusted on a mounting plate 58 laid over the connecting beam 13B of the upper movable beam 13. Roller mounting ribs 57b are integrally fixed to the lower surface of the back plate 57a of the pedestal 57 via the neck portion, and the mounting ribs 57b hold the neck portion of the mounting plate 56b.
It penetrates through the adjustment hole 56a opened in the and is hung downward.
The inner surface rotation roller 52 is pivotally attached to the rib 57b so that the position can be adjusted in the tube radial direction. A motor mount 57c is integrally erected on the upper surface of the back plate 57a. 57d is a rib of the motor mounting base, and the back plate 57a of the pedestal 57 and the mounting plate 56 are connected by an angle adjusting mechanism 58.

Power drive in the tube rotation mechanism section 50 is performed as follows. Small gear attached to the drive shaft of hydraulic motor 55
The reference numeral 60 denotes a large gear 61 having a rotation shaft in a rib at the bottom of the frame, which is rotated by a chain, and an outer surface rotation roller coaxial with the large gear 61.
Rotate 51. The outer surface rotation rollers 51 each have a gear 62 and are connected to each other by a chain. The inner surface rotation rollers 52 also have gears 63, which are connected to each other by a chain and are connected to the gears 62 of the outer surface rotation roller 51 to obtain a rotational driving force.

The power driving of the tube rotating mechanism 20 is not limited to the above, and only the outer rotating roller 51 may be power driven, and the inner roller 52 may be simply brought into pressure contact with the belt-shaped member 1 and rotated by following the friction. .

Further, when the outer and inner rotating rollers 51 and 52 are single, the drive shaft of the hydraulic motor 55 is connected to the shaft of the outer rotating roller 51, and the inner rotating roller 52 is connected to the hydraulic motor unit for press contact hydraulic pressure. It is possible to adopt a mode in which a predetermined pressure is applied by a cylinder (for example, a pressure contact cylinder denoted by reference numeral 106 in FIG. 7).

Lower Guide Mechanism 70 and Side Guide Mechanism 80 The lower guide mechanism 70 includes an outer guide roller 71 and an inner guide roller 72. They are mounted at the lowest end of the pipe P manufactured.

Each of the rollers 71, 72 is mounted on a pedestal 74 whose angle can be adjusted on a mounting plate 73 laid over the connecting beam 14B of the lower movable beam 14. The gantry 74 includes a back plate 74a and ribs 74b.
The a and the mounting plate 73 are connected by an angle adjusting mechanism 75. The inner surface roller 72 has its shaft portion supported by a rib 74b in the forward and backward direction toward the center of the tube axis.

The lower guide mechanism portion 70 resists the force that the strip-shaped member 1 is pulled upward and prevents the formation of the perfect circular pipe P, and the pipe P
To compensate for the roundness of.

The rear part 80 of the side guide comprises an outer guide roller 81 and an inner guide roller 82, which are arranged on a horizontal line passing through the central axis of the pipe P to be manufactured.

Each of the rollers 81 and 82 is mounted on a mount 85 fixed to a mounting plate 83 spanning the front pillar 11A and the rear pillar 11B via an angle adjusting mechanism 84. The mount 85 is a back plate 85 that faces the mounting 83.
a, a rib 85b that supports the shaft of the roller. The inner surface roller 82 has its shaft portion supported by a rib 85b so as to be able to move back and forth in the direction of the tube axis center.

As described above, those rollers are driven by the power in the belt-shaped member feeding mechanism unit 20 and the pipe rotating mechanism unit 50, and in the joining mechanism unit 40 and the guide mechanism units 70 and 80, those rollers are In particular, the outer surface rollers 41, 71, 81 are also appropriately power-driven. The driving force of these outer surface rollers 41, 71, 81 is rotationally driven by a hydraulic motor that is interlocked with a hydraulic unit like the feed mechanism unit 20 and the rotation mechanism unit 50. The inner rollers 42, 72, 82 may also be in a state of being pressed against each other by a hydraulic cylinder. It is not necessary to drive the lower guide mechanism 70 by power.

In the power drive of these rollers, the rotation of the power drive rollers 41, 51, 71, 81 of the pipe manufacturing mechanism other than the feed mechanism 20 is synchronized, and the rollers of the feed mechanism 20 are synchronized.
The rotation speed of 21 is slower than the rotation speed of other rollers.

Hydraulic Circuit Configuration FIG. 7 shows an example of an embodiment of a hydraulic circuit in which each pipe manufacturing mechanism is hydraulically driven.

That is, the feed mechanism unit 20 is provided with the hydraulic motor 101 for the outer surface feed roller 21 and the pressure contact cylinder 102 for the inner surface roller 22, and the joining mechanism unit 40 is provided with the hydraulic motor for the outer surface joining roller 41.
103 and a compression cylinder 104 of the inner surface roller 42 are arranged, a hydraulic motor 105 for the outer surface rotation roller 51 and a pressure contact cylinder 106 of the inner surface roller 52 are arranged in the rotation mechanism section 50, and
The side guide mechanism 80 includes a hydraulic motor for the outer guide roller 81.
107 and a pressure contact cylinder 108 for the inner surface roller 82 are arranged respectively. The hydraulic motors 101, 103, 105, 107 are provided with a rotation speed detector, for example, a rotary encoder, and send a rotation speed signal as a detection value to the control unit 120 as a speed control unit. Although the lower guide mechanism 70 is not hydraulically driven, adding it to this hydraulic circuit is a design matter.

The hydraulic motors 101, 103, 105, 107 are driven by the valve operation of the hydraulic motor electromagnetic proportional switching valves 111, 112, 113, 114 provided in the hydraulic lines branching from the hydraulic pumps, respectively, and the pressure contact cylinders 102, 104, 106, 108 also branch from the same hydraulic pump. The cylinder electromagnetic directional control valves 115, 116, 117, 118 installed in the hydraulic line are driven by valve operation.

A pressure compensating valve 111a and a pressure adjusting valve 111b are added between the electromagnetic proportional switching valve 111 and the hydraulic motor 101, and other switching valves 112, 113, 114 and the hydraulic motors 103, 105, 107 are provided.
Pressure compensating valves 112a, 113a, 114a are added between and. In the present embodiment, the pressure compensating valve 111a is arranged on the outward path side to the hydraulic motor 101, and the other pressure compensating valves 112a, 113a, 114a are arranged on the return path side of the respective hydraulic motors 103, 105, 107.

The hydraulic proportional switching valves 111 to 114 for hydraulic motors described above receive a control signal from the control unit (control unit) 120 to adjust the amount of oil and send it to the hydraulic motors 101, 103, 105, 107 to control the rotation speed corresponding to the pipe diameter. I do.

At this time, the hydraulic motors 101, 103, 105, 107 are compensated for the constant rotation even with respect to the pressure fluctuation due to the fluctuation of the load by the action of the pressure compensating valves 111a, 112a, 113a, 114a, and accurate roundness is obtained.

Further, the rotation of the hydraulic motor 101 of the feed mechanism is slowed down as compared with the other hydraulic motors due to the narrowing of the flow rate of the switching valve 111, so that the belt-shaped member 1 between the hydraulic motors 101 and 103 (or 107) is provided with a predetermined speed. Introduce tension. The pressure compensating valve 111a that exerts a pressure reducing action is disposed on the outward path side of the hydraulic motor 101, so that the hydraulic motor 101 can operate in the other hydraulic motor 1
Compared with 03, 105 and 107, the pressure is reduced and the rotational torque is reduced, whereby the tension on the belt-shaped member is adjusted.

A pressure adjusting valve 111b provided in a hydraulic circuit to the hydraulic motor 101 of the feed mechanism section reduces the pressure of the pressure oil to the hydraulic motor 101 when the pressure oil is fed back, and a pipe P is created. Rewind smoothly.

The cylinder electromagnetic directional control valves 115 to 118 only control the pressure contact cylinders to be turned on and off. Therefore, control by a special control unit is not necessary, and manual operation may be performed.

FIG. 8 shows an example of an electric control system of the above hydraulic circuit. In this electric control system, the hydraulic motors 101, 10
Consideration has been given to the synchronous rotation control of 3,105,107. The corresponding parts of the hydraulic motor 101 are omitted because they are similar to the hydraulic motors 103, 105, 107.

In steps S1 to S4, the four hydraulic motors are operated in a unified manner, but in steps S5 and thereafter, a control mode is adopted in which the respective hydraulic motors are operated independently.

The frequency signal of the rotary encoder is subjected to voltage conversion in step 5, and the voltage signal is sent to the speed control section in step S6. When a tachogenerator (speed generator) is used instead of the rotary encoder, voltage conversion becomes unnecessary, and the process directly proceeds to the speed control unit.

The speed control unit adjusts each of the gain, span and individual speed, and outputs a correction value according to the difference between the adjusted reference value and the comparison target value sent from step 5.
Note that the span adjustment determines the vertical width of the voltage (and thus the vertical width of the rotational speed of the hydraulic motor), where A is the lower limit (zero) level and B is the upper limit level.

Note that these speed control units are included in the control unit 120 described in the hydraulic circuit configuration above.

Preparation of Pipe Hereinafter, a method of preparing a pipe by the pipe making machine H of the present embodiment and a function of each structure of the pipe making machine will be described.

First, the pipe making machine H is prepared according to the diameter of the pipe P to be produced.
Adjust each part of. That is, the pillar member 11 and the lower guide mechanism portion 70 of the machine body frame 10 are adjusted in the width direction, and the upper and lower movable needles 13 and 14 are adjusted in the vertical direction. These adjustments can correspond not only to the adjustment of the tube diameter but also to the eccentricity adjustment to the central axis of the tube. In addition, when adjusting the eccentricity in the vertical direction, the joining mechanism portion 40 and the side guide mechanism portion 80 are also moved vertically to be adjusted.

Further, the belt-shaped member feeding mechanism unit 20, the belt-shaped member joining mechanism unit 40,
The swing angle of each roller of the tube rotation mechanism unit 50 and the guide mechanism units 70 and 80 is adjusted by each angle adjustment mechanism. These angle adjustments are made gentler as the pipe diameter increases, and become steeper as the pipe diameter becomes smaller.

Next, the tip portion of the pipe P is created. That is, the belt-shaped member 1 is fed out, and then the belt-shaped member feeding mechanism section 20, the joining mechanism section 40, the lower guide mechanism section 70, the side guide mechanism section 80, and the rotation mechanism section 50 of the pipe making machine H are sequentially manually operated. 1 is spirally wound, and its tip reaches the joining mechanism section 40. At this time, the inner surface rollers 42, 44, 72, 82, 52 which can be moved back and forth according to the diameter method are previously retracted in the tube axis center direction, and after passing the belt-shaped member 1, they are advanced to the outer roller side, The member 1 is clamped together with the outer surface roller.

When the power unit of each mechanism unit, that is, the hydraulic motor is driven in this state, the tip of the belt-shaped member 1 is forcibly fed between the outer surface joining roller 41 and the inner surface joining roller 42 of the joining mechanism unit 40, and the outer surface joining roller. By the action of 41, the end joints of the adjacent belt-shaped members mesh with each other and overlap. The polymerized joint is welded and joined by the welding roller 43 following the joining roller 41,
It is firmly joined.

Hereinafter, the strip-shaped member 1 is continuously supplied, and the pipe P is sequentially produced by the pipe manufacturing mechanism section.

The operation of the control device during pipe making is as follows.

The load on the hydraulic motors 101, 103, 105, 107 fluctuates, and due to the characteristics of the hydraulic motor itself, the rotation of the hydraulic motor tends to be uneven and the synchronous rotation tends to be broken. Will not be able to create a tube with).

The number of rotations of the hydraulic motors 101, 103, 105, 107 is detected by a rotary encoder added to each motor, and the detection signal is sent to the comparison unit in the speed control unit 120. The difference from the reference rotation speed is output from the comparison unit, and the speed control unit 120 controls the electromagnetic proportional switching valves 111, 112, 113, 114 based on this difference to adjust and control the oil amount so as to rotate the respective hydraulic motors 101, 103, 105, 107 in synchronization.

Lining Construction in Underground Buried Pipe FIG. 10 shows an outline of the lining construction work in which the pipe, that is, the lining pipe P is inserted into the underground buried pipe Q using the pipe making machine H of the present invention.

In the figure, J is an upright hole, and K is a winding drum arranged at the opening of the upright hole J. Further, the vehicle O on which the power generator L, the electric heat welding transformer M and the hydraulic motor unit N are mounted is placed on standby on the ground portion, and is arranged from the electric heat welding transformer M and the hydraulic motor unit N. The electric wire and the hydraulic hose are connected to required parts of the pipe making machine H.

A technical problem that arises in such lining construction work is whether the pipe manufacturing machine can be carried into the narrow vertical hole J and whether or not the operation is easy.
It is not always arranged at the center position of the pipe, and whether or not the eccentricity adjustment of the pipe making machine installed at the bottom of the vertical hole can be easily performed, etc. As is clear from the above description, the pipe making machine of the present invention can easily overcome the above problems.

Further, each hydraulic motor is synchronously rotated at a feed speed corresponding to the pipe diameter via an electromagnetic proportional control valve based on a command from the speed control unit.

At this time, the hydraulic motor of the feed mechanism section is decelerated more than the other hydraulic motors, and as a result, a tensile force (pullback force) is introduced into the belt-shaped member, and the slack of the belt-shaped member in the other pipe-making mechanism section is adjusted and uniform Lining tube can be obtained.

In addition, since the hydraulic motor of the feed mechanism has a smaller torque than other hydraulic motors, it follows other motors and ensures the introduction of the desired tension.

Furthermore, the synchronous operation is maintained as described above even with respect to load fluctuations such as friction and bending with the embedded pipe Q that occur during the insertion operation of the lining pipe P into the embedded pipe Q, and the lining of a predetermined diameter is maintained. A tube P is obtained.

[Other Examples]

FIG. 11 shows another embodiment of the present pipe making machine. In the figure, the same reference numerals are given to the same members as those in the above-described embodiment.

In this embodiment, the lower part of the machine body frame 10 is only the lower fixed beam 15, the lower guide roller mechanism 90 is fixed to the lower fixed beam 15, and the inner surface roller 91 is arranged downward.

For more details, attach the mounting plate 9 to the rear beam 15B of the lower fixed beam 15.
2 is fixed along the rear beam 15B so that its position can be adjusted, and a pedestal 93 is attached to the tip of the attachment plate 92 via an angle adjustment mechanism (not shown). The nut member 94 is mounted on the frame 93.
The nut member 94 has a roller holding member at its lower end.
A screw rod 96 having 95 fixed thereto is spirally arranged so that the position of the roller 91 can be adjusted in the vertical direction.

In the pipe manufacturing machine of this embodiment, the lower fixed beam 15 is placed in an invert S shape in a manhole, and the lining pipe P is formed by using the curved surface of the pipe line.

[Embodiment]

The present invention is not limited to the above embodiments, and various design changes can be made within the scope of the basic technical idea of the present invention. That is, the following aspects are included in the technical scope of the present invention.

The pipe manufacturing mechanism is not necessarily specified at the position of this embodiment, but may be arranged at a position for holding the perfect circle of the manufactured pipe. For example, the joining mechanism portion 40 is arranged at a tangential position where the strip-shaped member 1 is closed to form a pipe, and not only the horizontal position passing through the central axis of the pipe P but also the closed position of the supplied strip-shaped member. The position can be set appropriately. Further, the feed mechanism unit 20 can be attached to the upper portion of the body frame 10 (that is, on the upper beam 12).

Disposing the lower movable beam 14 and mounting the lower guide roller mechanism 70 on the lower beam 15. In this case, in adjusting the pipe diameter, the movement of the upper movable beam 13 is doubled, and the joining mechanism 40 and the side guide mechanism 80 are also movable.

To eliminate the outer guide roller 71 of the lower guide mechanism part 70 and guide it by the inner guide roller 72.

Disposing the welding roller 43 in the joining mechanism section 40, and arranging a welding means (for example, an adhesive injection nozzle) at a position before the belt-shaped members 1 are superposed by the joining rollers 41, 42.

The angle adjusting mechanisms 28, 47, 58, 75, 84 are not limited to those of this embodiment. What is essential is that each pipe manufacturing mechanism can be adjusted to a predetermined angle according to the pipe diameter.

It is a matter of course that the constituent members of the machine body frame 10 are made of appropriate materials and shapes, and that the belt-shaped members are joined only by the joining rollers 41, 42, etc.

C. Effects of the Invention Since the synchronous drive mechanism in the hydraulically driven pipe manufacturing machine of the present invention has the above-mentioned configuration and has the effect, it has the following unique effects.

The rotation of each hydraulic motor that feeds and drives the belt-shaped member is accurately and automatically obtained by an electromagnetic proportional switching valve that is commanded by the speed control unit, which maintains the feed speed corresponding to each pipe diameter, and is artificially operated. It is possible to achieve abbreviation without.

The pressure compensating valve works to compensate the accuracy of the synchronous rotation of the hydraulic motor, to create an accurate and constant tube for load changes, and to introduce the desired tension to the belt-shaped member. To produce.

[Brief description of drawings]

1 to 8 show an embodiment of a synchronous drive mechanism in a hydraulically driven pipe manufacturing machine according to the present invention. FIG. 1 is a front view of the hydraulically driven pipe manufacturing machine, and FIG. 2 is a left side surface thereof. Drawing (partial cross-sectional view), FIG. 3 is a plan view thereof, FIG. 4 is a right side view (partial cross-sectional view) thereof, FIG. 5 is an exploded three-dimensional view of a beam portion of a body frame, and FIG. 6 is an angle. FIG. 7 is a sectional view of the adjusting mechanism, FIG. 7 is an embodiment diagram of a hydraulic circuit of the present pipe making machine, and FIG. 8 is an exemplary view of a control system thereof. FIG. 9 is a cross-sectional view of one embodiment of the strip-shaped member used in the present invention, and FIG. 10 is a diagram showing the implementation of the present invention in an underground buried pipeline. FIG. 11 is a front view of a pipe manufacturing machine of another embodiment. 1 ... band-shaped member, 10 ... machine frame, 20 ... feed drive mechanism part, 21 ... outer surface feed roller, 22 ... inner surface feed roller, 40 ... joining mechanism part, 41 ... outer surface joining roller, 42 ... …
Inner surface roller, 50 ...... Tube rotation mechanism part, 51 ...... Outer surface rotation roller, 52 ...... Inner surface roller, 70, 80 ...... Guide mechanism part, 71, 81 ...
… External guide rollers, 72,82 …… Inner rollers, 101,103,10
5,107 …… hydraulic motor, 111,112,113,114 …… electromagnetic proportional switching valve, 111a, 112a, 113a, 114a …… pressure compensation valve, 111b ……
Pressure control valve, 120 ... Control unit (control section)

Claims (1)

[Claims] 1. An outer surface roller (21, 41, 51, 71, 81) and an inner surface roller (22, 42, 52, 72, 82) are respectively provided, and the belt-shaped member (1) is narrowed by these inner and outer surface rollers. It is equipped with the respective pipe making mechanism parts (20), the joining mechanism part (40), the rotating mechanism part (50), and the guide mechanism parts (70, 80) for wearing and feeding and driving these feed mechanism parts ( In a pipe making machine (H) for making a lining pipe (P) by spirally winding the band-shaped member (1) by a pipe making mechanism (40, 50, 70, 80) excluding 20), at least a guide One of the mechanism parts (70, 80) and the outer rollers of the other pipe manufacturing mechanism parts (20, 40, 50) are driven by independent hydraulic motors (101, 103, 105, 107), and those hydraulic motors are operated by the respective hydraulic pressures. An electromagnetic proportional switching valve (111, 112, 113, 1) is input via a speed control unit (120) that receives the rotation speed of the motor as a detection signal and instructs synchronous rotation. 1
4) is operated by the hydraulic motors (101, 103, 105, 107) of these pipe manufacturing mechanisms (20, 40, 50, 70, 80) and their respective solenoid proportional switching valves (11
1,112,113,114) between the pressure compensating valves (111a, 112a, 113a, 114a) for adjusting the pressure of pressure oil to these hydraulic motors.
(a) is interposed, and the hydraulic motor (101) of the feed mechanism section (20) is driven under reduced pressure. A synchronous drive mechanism in a hydraulically driven pipe manufacturing machine.