JPH0741309B2 - Synchronous drive mechanism in hydraulic drive pipe making machine - Google Patents

Description

Detailed Description of the Invention

A. OBJECT OF THE INVENTION (1) Industrial field of use The present invention relates to a pipe-making machine that spirally winds a strip-shaped member to create a pipe, and more specifically, feed drive / joining drive / rotation of the strip-shaped member with hydraulic drive. The present invention relates to a so-called hydraulically driven pipe making machine that drives the pipe. 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 that spirally winds a belt-shaped member to manufacture a pipe continuously receives an extrusion force in the process of manufacturing the manufactured pipe. Since it is manufactured in, it is only necessary to place the pipe making machine in a certain place, which 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 construction inside underground pipes, load fluctuations due to friction with the inserted lining pipes due to unevenness and bending in the underground pipes are also a big problem, and uniform lining pipes are obtained. It is an obstacle. Origin
Applicants previously mentioned Japanese Patent Application No. 60-159541 (Japanese Patent Application No.
-48392, hereinafter referred to as "prior art"),
The belt-shaped member is fed by the feed roller, and the joining roller and
Guide roller and rotation arranged behind the joining roller
The strip-shaped member is made into a tubular shape with the pipe-making mechanism that consists of rollers.
This type of pipe making machine was proposed. However, this
In prior art pipe making machines, splicing rollers, guide rollers
And a belt-like portion that is wound around the rotating roller and wound in a spiral shape
There is a tendency for the material to sag, so it is necessary to create a pipe with a constant diameter.
In addition, it takes time and skill to adjust the driving force of these rollers.
It is supposed to do.

(3) Technical Problem of the Present Invention The present invention is a further development of the prior art in view of the above circumstances.
Therefore, the rollers of the pipe manufacturing mechanism are driven by changing the pipe diameter.
The force can be adjusted automatically and accurately, and further,
The belt-shaped member wound in a spiral shape does not cause slack and is smoothed.
To provide a pipe making machine capable of obtaining a pipe of a uniform diameter
The purpose (technical problem). Therefore, in the present invention,
Adopts a hydraulic drive type pipe making machine and synchronizes the hydraulic circuit mechanism.
Achieved this goal by developing a new drive mechanism
It is something to try.

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, the outer roller 21, 41, 51, 71, 81 and the inner roller 22, 42, 52, 72, 82 tightly clamp the belt-shaped member 1 to feed and drive the feed mechanism unit 20, the joining mechanism unit 40, and the rotation mechanism unit. A pipe-making machine that includes the pipe-making mechanism portions 50 and the guide mechanism portions 70 and 80, and that makes the lining pipe P by spirally winding the strip-shaped member 1 by the pipe-making mechanism portions excluding these feeding mechanism portions. At H, at least one of the guide mechanism portions and the outer rollers of the other pipe manufacturing mechanism portions are driven by independent hydraulic motors 101, 103, 105, 107, respectively, and these hydraulic motors rotate the respective hydraulic motors. An electromagnetic proportional switching valve 11 that controls the flow rate via a speed control unit 120 that instructs synchronous rotation using a number or the like as a detection signal.
It is operated by 1,112,113,114, feeder
The feed mechanism unit is configured by reducing the flow rate to the hydraulic motor 101 of the structural unit.
The feed speed of the hydraulic motor 101 is slower than the feed speeds of the other hydraulic motors.

(2) Action The belt-shaped members that are continuously supplied to the feed mechanism unit 20, the joining mechanism unit 40, the guide mechanism units 70 and 80, and the outer surface roller and the inner surface roller of each pipe manufacturing mechanism unit of the rotation mechanism unit 50. The tube is manufactured by passing it between the two and spirally winding it. Each hydraulic motor 1
01, 103, 105, 107 are electromagnetic proportional switching valves 111, 112 , 11 based on a command from the speed control unit 120.
By the flow rate control of 3,114, it is synchronously rotated at a predetermined feed rate corresponding to the pipe diameter. Further, the solenoid proportional switching valve 1
The flow rate is narrowed by 11 and the hydraulic pressure of the feed mechanism 20 is adjusted.
The motor 101 includes other hydraulic motors 103, 105, 10
The hydraulic motor 10 of the feed mechanism 20 is decelerated more than 7
Between 1 and the other hydraulic motors 103, 105, 107
A pulling force (pulling back force) is introduced into the belt-shaped member. this
This allows the rotation mechanism section and the guide mechanism section after the joining mechanism section to be
A circle that is laid around the pipe making mechanism and spirally wound.
The slack of the strips that close in shape is adjusted.

(3) Embodiment An embodiment of the synchronous drive mechanism in the hydraulically driven pipe manufacturing machine of the present invention will be described below with reference to the drawings. 1 to 8 are lining pipe making machines of the present invention (hereinafter simply referred to as "pipe making machines")
An example of H will be shown.

Band- shaped member 1 FIG. 9 shows a band-shaped member used in the present invention. Band-shaped member 1
An appropriate number of trapezoidal protrusions 2 are continuously provided vertically in the longitudinal direction of the outer surface, and valleys 3 are formed between the protrusions 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 the inner surface thereof has a round groove 5a.
Are provided vertically, and the overhang portion 5b is slightly longer than the width of the valley portion 3. The inner joint portion 6 has its overhanging portion 6a longer than the valley portion 3, and the overhanging portion 6a
A round ridge 6b that engages with the round groove 5a of the outer joint portion 5 is vertically provided at the end of the, and a notch groove 6c is vertically provided at the ridge 2 at the base of the round ridge 6b. . 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), and the round ridge 6b is formed in the round groove 5a.
Further, the ends of the overhanging portions 5b are fitted into the notch groove 6c and joined together. Further, a welding roller 43 (described later) is pressed against the overlapping portion and welded and joined 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 / adhesion can be omitted. The belt-shaped member is made of a synthetic resin material, and particularly from the viewpoint of moldability, it can be continuously molded by extrusion forming vinyl chloride (P
VC) resin is preferred. However, it does not prevent the metal molding.

[0008] The detailed structure of the steel pipe machine H manufactured tube machine H is shown in Figure 1 to Figure 6. The pipe making machine H includes a machine body frame 10, a belt-shaped member feeding mechanism portion 20, a belt-shaped member joint portion joining mechanism portion 40, and a pipe rotation mechanism portion 5.
0, the lower guide mechanism 70 and the side guide mechanism 80. 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 and an upper movable beam 13. , Lower movable beam 14 and lower beam 15. The length of the machine body frame 10 can be adjusted three-dimensionally, and can freely correspond to the pipe diameter. More specifically, the pillar member 11 is made of box-shaped steel, and includes a front pillar 11A and a rear pillar 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 are opened downward, and the side beam 12B connecting them is made of a box steel. The upper movable beam 13 is made of grooved steel with front and rear beams 13A opening forward and backward,
Connecting beam 1 consisting of two box-shaped steels in their center
They are linked by 3B. 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 having front and rear openings, and are connected at the center thereof by two connecting beams 14B made of box 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-making mechanism (a feed mechanism portion and other pipe-making mechanism portions) which will be described later and holding each of the mechanism portions in accordance with the pipe diameter of the pipe P. The column members 11 are beam members 12, 13, 14,
It is variable in the width direction along 15. That is, a large number of adjusting bolt holes 12a, 13a, 14a, 15a are bored in the longitudinal direction in the front and rear beam members 12, 13, 14, 15, and the column member 11 is arranged in the width direction 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 pillar members 11
It is variable up and down along. That is, the pillar member 11
A plurality of bolt holes 11a for adjustment are formed in the vertical direction of the shaft, and the upper and lower movable beams 13 and 14 are moved in the vertical direction along the bolt holes and fixed by bolts 17. 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,
14B is fixed by bolts 18 so as to be movable and adjustable along the front and rear beams 13A and 14A. The lower beam 15 is placed on the base I.

[0011] strip feed mechanism 20 strip feed mechanism section 20 (see FIGS. 1 to 4), a plurality of outer surface feed roller 21 which ridges 2 of the outer surface of the belt-shaped member 1, along the valleys 3 is pressed And a plurality of inner surface feed rollers 22 pressed against the inner surface of the belt-shaped member 1. External feed roller 2
1. An outer cover belt 23 and an inner cover belt 24 made of rubber are mounted on the inner feed roller 22 and the inner feed roller 22, respectively.
In this embodiment, the outer surface feed roller 21 and the inner surface feed roller 2
A plurality of 2 are arranged, but a single one may be used. Further, the outer and inner band-covering belts 23 and 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 roller 21, 22 and hydraulic motor 2
5 is mounted on a pedestal 27 whose angle can be adjusted on a mounting plate 26 laid over the front pillar 11A and the rear pillar 11B. The pedestal 27 is a back plate 27a facing the mounting plate 26,
A rib 27b that supports the shaft of the roller and a shelf plate 27c that mounts and fixes the motor 25 are provided. Back plate 27 of frame 27
a is an angle adjusting mechanism (adjuster) 2 with respect to the mounting plate 26.
8 is connected and fixed so that the angle can be adjusted. The angle adjusting mechanism 28, as shown in FIG.
A screw rod 28a projectingly fixed to the mounting plate 26, a groove 28b formed in the mounting plate 26 at a required angle to insert the screw rod 28a, and a nut 28c screwed to the screw rod 28a to draw the back plate 27a toward the mounting plate 26. Consists of. 28d is a washer. The angle adjusting mechanism is the joining mechanism section 4 described later.
0, the rotation mechanism section 50, and the guide mechanism sections 70 and 80, the substantial mechanism of which is the feed mechanism section 2
It is equivalent to the angle adjusting mechanism 28 at 0.

Power drive in the belt-shaped member feeding mechanism 20 is performed as follows. The small gear 30 attached to the drive shaft of the hydraulic motor 25 rotates a large gear 31 having a rotation shaft on a rib 27b of the gantry 27 by a chain (not shown), and the inner surface feed roller 22 coaxial with the large gear 31.
To rotate. The inner surface feed rollers 22 have gears 32 on both sides and are connected to each other by a chain (not shown). Further, the outer surface feed roller 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 rotated by following the friction. Good. Furthermore, when the outer surface and inner surface feed rollers 21 and 22 are single, the drive shaft of the hydraulic motor 25 is set to the outer surface feed roller 2
While being directly connected to the shaft 1, the inner surface feed roller 22 can be pressed with a predetermined pressure by a hydraulic cylinder for pressure contact (for example, a pressure contact cylinder shown by reference numeral 102 in FIG. 7) connected to the hydraulic motor unit. .

Joining Mechanism Section 40 The belt-like member joint section joining mechanism section 40 (see FIGS. 1 and 4) is
The outer surface joining roller 41, the inner surface joining roller 42, and the welding roller 43 are included. 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 source terminal (not shown),
The power supply terminal is connected to a power generator. The rollers 41, 42, 43, 44, the power supply terminals, etc. are the front pillars 11A.
It is mounted on a pedestal 46 whose angle can be adjusted on a mounting plate 45 laid between the rear pillar 11B and the rear pillar 11B. The gantry 46 includes a back plate 46a and ribs 46b, and the back plate 46d and the mounting plate 45 are connected by an angle adjusting mechanism 47 (the structure of which is based on 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.
3 is pivotally mounted so that the eccentric position can be adjusted.

Tube Rotating Mechanism Section 50 The tube rotating mechanism section 50 (see FIGS. 1, 2 and 3) is arranged above 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 5
One 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 valleys 3 of the outer surface of the inner surface rotation roller 5.
The strip 2 is pressed against the inner surface of the strip-shaped member 1. The outer surface rotation roller 51 and the inner surface rotation roller 52 have an outer surface rotation bandage belt 53 and an inner surface bandage belt 54 made of rubber, respectively.
Is attached to obtain a uniform rotational force to the pipe P.
In this embodiment, the outer surface rotation roller 51 and the inner surface rotation roller 5
A plurality of 2 are arranged, but a single one may be used. Further, the outer and inner band-covering belts 53 and 54 may 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 portion 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 ridge 2 and the valley portion 3 of the belt-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 rotation mechanism section 50, but also the outer surface rollers of the other pipe making mechanism sections 40, 70, 80 are arranged to be inclined with respect to the axis of the pipe P, and thus contribute to thrust as well. . Each roller 51,
52 and the hydraulic motor 55 are the connecting beams 13 of the upper movable beam 13.
It is mounted on a pedestal 57 arranged on a mounting plate 56 laid over B so that the angle can be adjusted. Roller mounting ribs 57b are integrally fixed to the lower surface of the back plate 57a of the pedestal 57 through the neck portion, and the mounting ribs 57b penetrate the adjustment holes 56a formed in the mounting plate 56 and hang downward. Set up. 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. Also, the back plate 57a
A motor mount 57c is integrally erected on the upper surface of the. 57d is a rib of the motor mount. Stand 57
The back plate 57a and the mounting plate 56 are connected by an angle adjusting mechanism 58.

Power drive in the tube rotating mechanism 50 is performed as follows. The small gear 60 attached to the drive shaft of the hydraulic motor 55 is rotated by a chain to a large gear 61 having a rotation shaft in a rib at the bottom of the gantry.
The outer surface rotation roller 51 coaxial with is rotated. 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 rollers 51 to obtain a rotational driving force. The power drive of the tube rotation mechanism unit 20 is not limited to the above, and only the outer surface rotation roller 51 is power driven,
The inner surface roller 52 may simply be in pressure contact with the belt-shaped member 1 and rotated by following the friction. Further, when the outer surface and inner surface rotating rollers 51 and 52 are single, the drive shaft of the hydraulic motor 55 is directly connected to the shaft of the outer surface rotating roller 51, and the inner surface rotating roller 52 is connected to the hydraulic motor unit. It is possible to adopt a mode in which a cylinder (for example, a pressure contact cylinder shown by reference numeral 106 in FIG. 7) is pressed at a predetermined pressure.

Lower guide mechanism 70 and side guide mechanism 8
The 0 lower guide mechanism unit 70 includes an outer surface guide roller 71 and an inner surface guide roller 72. They are mounted at the lowest end of the pipe P manufactured. Each of the rollers 71 and 72 is mounted on a pedestal 74 whose angle is adjustable 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, and the back plate 74a and the mounting plate 73 are connected by an angle adjusting mechanism 75. The inner roller 72 has its shaft portion supported by a rib 74b so as to be movable back and forth in the direction of the tube axis center. The lower guide mechanism portion 70 resists the force that the strip-shaped member 1 is pulled upward and prevents the formation of the circular pipe P, and ensures the circularity of the pipe P.

The side guide mechanism 80 includes the outer surface guide roller 8
1 and an inner surface guide roller 82, which are arranged on a horizontal line passing through the central axis of the pipe P to be manufactured. Each roller 8
1, 82 are mounted on a pedestal 85 fixed to a mounting plate 83 laid between the front pillar 11A and the rear pillar 11B via an angle adjusting mechanism 84. The mount 85 includes a back plate 85a facing the mounting plate 83 and ribs 85b for supporting the shaft portion of the roller.
Consists of. The inner surface roller 82 has its shaft portion supported by a rib 85b so as to be movable back and forth in the direction of the tube axis center.

As described above, the rollers of the power drive belt-shaped member feed mechanism section 20 and the tube rotation mechanism section 50 are driven by power, and those of the joining mechanism section 40 and the guide mechanism sections 70 and 80 are driven by them. Rollers, in particular outer rollers 41, 71, 8
1 is 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 rotary mechanism unit 50. Further, 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. 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 rotation speed of the roller 21 of the feed mechanism 20 is Reduce the rotation speed of other rollers.

Hydraulic Circuit Structure FIG. 7 shows an embodiment of a hydraulic circuit in which each pipe manufacturing mechanism is hydraulically driven. That is, the feed mechanism 20 is provided with the hydraulic motor 101 for the outer feed roller 21 and the pressure contact cylinder 102 for the inner roller 22, and the joining mechanism 40 is provided with the hydraulic motor 103 for the outer join roller 41 and the inner roller 4.
The pressure contact cylinder 104 and the rotation mechanism unit 50 are arranged.
Is provided with a hydraulic motor 105 for the outer surface rotating roller 51 and a pressure contact cylinder 106 for the inner surface roller 52, and the side guide mechanism 80 is provided with a hydraulic motor 107 for the outer surface guide roller 81 and the inner surface roller 82. And the cylinders 108 are provided respectively. Hydraulic motor 101, 103, 10
5, 107 are provided with a rotation speed detector, for example, a rotary encoder, which sends a rotation speed signal as a detection value to a control unit 120 as a speed control unit. The lower guide mechanism 70 is not hydraulically driven, but addition to this hydraulic circuit is a design matter.

Hydraulic motors 101, 103, 105, 1
Reference numeral 07 denotes an electromagnetic proportional switching valve 111, 112 for a hydraulic motor, which is provided in a hydraulic pipe branching from the hydraulic pump.
Cylinder electromagnetic directional control valves 115, 116, which are driven by valve operations of 113, 114, and whose pressure welding cylinders 102, 104, 106, 108 are also installed in hydraulic lines of different systems branching from the same hydraulic pump. It is driven by the valve operation of 117 and 118. Then, the solenoid proportional switching valve 11
1 and the hydraulic motor 101, a pressure compensating valve 111a and a pressure adjusting valve 111b are added, and other switching is performed.
Valves 112, 113, 114 and hydraulic motors 103, 10
5, 107 and pressure compensation valves 112a and 112a,
13a and 114a are added. In this embodiment, pressure compensation
The valve 111a is arranged on the outward path to the hydraulic motor 101,
The pressure compensation valves 112a, 113a, 114a of the
It is arranged on the return path side of the data 103, 105, 107.

The electromagnetic proportional switching valve 11 for the hydraulic motor described above
1 to 114 receive a control signal from a control unit (control unit) 120 to adjust the oil amount and adjust the hydraulic motor 10
By sending a predetermined amount of oil to 1, 103, 105, 107, the rotation speed control corresponding to the pipe diameter is performed. At this time,
Each hydraulic motor 101, 103, 105, 107 is compensated for a constant rotation even with respect to a pressure fluctuation caused by a load fluctuation by the action of each pressure compensation valve 111a, 112a, 113a, 114a, and an accurate roundness is obtained. To be In addition, the switching valve 1
By narrowing the flow rate of 11, the hydraulic motor of the feed mechanism section
The rotation of 101 is slower than that of other hydraulic motors.
Between the hydraulic motors 101 and 103 (or 107)
A predetermined tension is introduced into the belt-shaped member 1. And depressurization
The pressure compensating valve 111a for
Since the hydraulic motor 101 is disposed on the other side,
Compared with the motors 103, 105, 107, they are driven at reduced pressure,
The rotation torque of the
Adjustment of power is made. The hydraulic motor 1 of the feeding mechanism section
01 pressure control valve 111b installed in the hydraulic circuit
When the pressure oil is fed back, the pressure oil to the hydraulic motor 101 is
The pressure is reduced to facilitate the unwinding of the pipe P to be created.
You

FIG. 8 shows an example of the electric control system of the above hydraulic circuit. In this electric control system, consideration is given to the synchronous rotation control of the hydraulic motors 101, 103, 105, 107. The corresponding parts of the hydraulic motor 101 are omitted because they correspond 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 subsequent steps, a control mode in which each hydraulic motor is operated independently is adopted. 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. The span adjustment determines the vertical width of the voltage (and thus the vertical width of the rotational speed of the hydraulic motor), and A is the lower limit (zero) level,
The B is the upper limit level. Note that these speed control units are the control unit 12 described in the hydraulic circuit configuration above.
Included within 0.

Preparation of Pipe The method of preparing a pipe by the pipe making machine H of this embodiment and the function of each structure constituting the pipe making machine will be described below. First, each part of the pipe making machine H is adjusted according to the pipe diameter of the pipe P to be produced. That is, the column 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 beams 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. When adjusting the eccentricity in the vertical direction, the joining mechanism 40 and the side guide mechanism 80 are also moved up and down for adjustment. Further, the swing angle of each roller of the belt-shaped member feeding mechanism unit 20, the belt-shaped member joining mechanism unit 40, the tube rotating mechanism unit 50, and the guide mechanism units 70 and 80 is adjusted by each angle adjusting 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 prepared. That is, the belt-shaped member 1 is fed out, and then the belt-shaped member feeding mechanism unit 20, the joining mechanism unit 40, the lower guide mechanism unit 70, the side guide mechanism unit 80, and the rotation mechanism unit 50 of the pipe manufacturing machine H are sequentially manually operated. 1 is spirally wound, and its tip reaches the joining mechanism 40. At this time, the inner surface rollers 42, 44, 72, 82, 52 that can be moved back and forth according to the diameter method are retracted in advance in the tube axis center direction, and after passing through the belt-shaped member 1, are advanced to the outer surface roller side, The member 1 is clamped together with the outer surface roller.

When the power unit of each mechanism, that is, the hydraulic motor is driven in this state, the tip of the belt-shaped member 1 is joined to the joining mechanism section 4.
0 is forcibly fed between the outer surface joining roller 41 and the inner surface joining roller 42, and by the action of the outer surface joining roller 41, the end joints of the adjacent belt-like members are meshed with each other. The polymerized joint portion is welded and joined by the welding roller 43 following the joining roller 41, and is firmly joined. Hereinafter, the strip-shaped member 1 is continuously supplied, and the pipes P are sequentially produced by the pipe-making element.

The operation of the control device during pipe making is as follows. The load applied to the hydraulic motors 101, 103, 105, 107 varies, and due to the characteristics of the hydraulic motor itself, the rotation of the hydraulic motor tends to be uneven and the tuning tends to be broken (when the tuning is lost, the belt-shaped member sags. , It will not be possible to create a tube with an exact circle). 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 rotational speed is output from the comparison unit, and the speed control unit 120 causes the electromagnetic proportional switching valves 111, 1 to output based on the difference.
12, 113, 114 are controlled to adjust and control the amount of oil so that the hydraulic motors 101, 103, 105, 107 are synchronously rotated.

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 the vertical hole, K is the vertical hole J
It is a winding drum arranged at the hole mouth of the. On the ground, a vehicle O equipped with a power generator L, an electric heat welding transformer M, and a hydraulic motor unit N is also on standby.
An electric wire and a hydraulic hose arranged from the electric heat welding transformer M and the hydraulic motor unit N are connected to required portions of the pipe manufacturing machine H. As a technical problem that occurs in such a lining construction work, whether the pipe-making machine can be carried into the narrow vertical hole J and whether the operation is easy, and the buried pipe Q is always located at the center position of the vertical hole J. Whether or not it is possible to easily adjust the eccentricity of the pipe making machine installed at the bottom of the upright hole, rather than being arranged, is a matter. 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 feeding mechanism section
Hydraulic motors are slowed down
As a result, a tensile force (pullback force) is introduced into the belt-shaped member,
Adjust the slack of the band-shaped member in the other pipe manufacturing mechanism of
A uniform lining tube is obtained. In addition, the feed mechanism
Hydraulic motors have less torque than other hydraulic motors.
Ensures that the desired tension is introduced by following other motors.
It 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 running pipe P into the embedded pipe Q, and the lining of a predetermined diameter is maintained. A tube P is obtained.

In the above embodiment, each hydraulic motor 101,
The drive of 103, 105, 107 is the proportional solenoid control valve 111, 112, 113, 1 branched from one hydraulic pump.
However, it is also possible to drive them by separate hydraulic pumps corresponding to the respective hydraulic motors. In this case, it is a natural design consideration to control the oil amount of each separate hydraulic pump based on the command from the control unit 120, for example, by the electric motor M with an inverter.

FIG. 11 shows another embodiment of the pipe manufacturing 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 composed of 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. More specifically, a mounting plate 92 is fixed to the rear beam 15B of the lower fixed beam 15 so that the position of the mounting plate 92 can be adjusted along the rear beam 15B, and a pedestal 93 is provided at the tip of the mounting plate 92 with an angle adjusting mechanism (not shown). ) Is attached via. A nut member 94 is planted on the pedestal 93, and a screw rod 96 having a roller holding member 95 fixed to the lower end thereof is spirally attached to the nut member 94 to form a roller 91.
The position can be adjusted vertically. In the pipe manufacturing machine of this embodiment, the lower fixed beam 15 is placed in an invert S shape in the manhole, and the lining pipe P is formed by using the curved surface of the pipe line.

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 decided as appropriate. Further, the feed mechanism unit 20 can be attached to the upper portion of the machine body frame 10 (that is, on the upper beam 12). Eliminating the lower movable beam 14 and mounting the lower guide roller mechanism 70 on the lower beam 15. In this case, the pipe diameter is adjusted by doubling the movement of the upper movable beam 13, and the joining mechanism 40
The side guide mechanism 80 is also movable. The outer guide roller 71 of the lower guide mechanism unit 70 is abolished and guided 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 and 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. Since the constituent members of the machine body frame 10 are made of appropriate materials and shapes, and the belt-shaped members are joined only by the joining rollers 41 and 42, it is a matter of course as a matter of design and will not be described in detail.

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. Rotation of each hydraulic motor that drives the belt-shaped member is speed
Flow control is possible by the solenoid proportional switching valve commanded by the control unit.
Made and hold the feed rate corresponding to each pipe diameter, this result
Synchronous rotation is precisely and automatically obtained, and there is no human operation.
Labor saving can be achieved. By decelerating the hydraulic motor of the feed mechanism, the joining machine
Roller of pipe making mechanism part of structure part, guide mechanism part, rotation mechanism part
Tension is applied to the belt-shaped member that is wound between the two and is spirally wound.
It prevents the occurrence of sagging and creates a pipe with a constant diameter.
Be done.

[Brief description of drawings]

FIG. 1 is a front view of a pipe making machine according to an embodiment of a synchronous drive mechanism in a hydraulically driven pipe making machine according to the present invention.

FIG. 2 is a left side view (partially sectional view) thereof.

FIG. 3 is a plan view thereof.

FIG. 4 is a right side view (partially sectional view) thereof.

FIG. 5 is an exploded perspective view of a beam portion of a body frame.

FIG. 6 is a sectional view of an angle adjusting mechanism.

FIG. 7 is a diagram showing an embodiment of a hydraulic circuit of the pipe manufacturing machine.

FIG. 8 is a control system diagram thereof.

FIG. 9 is a cross-sectional view of an embodiment of a belt-shaped member used in the present invention.

FIG. 10 is a diagram showing an implementation procedure in which the present invention is applied to an underground buried pipeline.

FIG. 11 is a front view of a pipe manufacturing machine according to another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Belt-shaped member, 10 ... Machine frame, 20 ... Feed drive mechanism part, 21 ... Outer surface feed roller, 22 ... Inner surface feed roller,
40 ... Joining mechanism section, 41 ... Outer surface joining roller, 42 ... Inner surface roller, 50 ... Tube rotating mechanism section, 51 ... Outer surface rotating roller,
52 ... Inner surface roller, 70, 80 ... Guide mechanism part, 71, 8
1 ... Outer guide roller, 72, 82 ... Inner roller, 10
1, 103, 105, 107 ... Hydraulic motor, 111, 1
12, 113, 114 ... Electromagnetic proportional switching valve, 111a, 1
12a, 113a, 114a ... Pressure compensation valve, 111b ...
Pressure control valve, 120 ... Control unit (control section)

Claims (1)

[Claims] 1. Outer rollers 21, 41, 51, 71, 8
1 and the inner surface rollers 22, 42, 52, 72, 82, the feeding mechanism unit 20 for narrowing and driving the band-shaped member 1 for feeding, the joining mechanism unit 40, the rotating mechanism unit 50, and the guiding mechanism units 70, 8.
At least a guide mechanism unit in a pipe making machine H which is provided with 0 pipe making mechanism units and which makes the lining pipe P by spirally winding the band-shaped member 1 by the pipe making mechanism units excluding these feeding mechanism units. And the outer rollers of each of the other pipe manufacturing mechanisms are independent hydraulic motors 101, 103, 10 respectively.
The hydraulic motors are driven by the motors 5 and 107, and the flow rate of the hydraulic motors is controlled via a speed control unit 120 which instructs synchronous rotation by using the rotation speed of each hydraulic motor as a detection signal.
By the electromagnetic proportional switching valves 111, 112, 113, 114
It is operated Te, the flow rate to the hydraulic motor 101 of the feed mechanism
A synchronous drive mechanism in a hydraulically driven pipe manufacturing machine, characterized in that the feed speed of the hydraulic motor 101 of the feed mechanism is reduced more than the feed speed of other hydraulic motors.