JP2871884B2 - Curling straightening device for resin coil tubes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called recoiler which straightens a resin pipe such as a plastic pipe wound in a coil shape and straightens it. In recent years, resin pipes have been used for gas pipes and other pipes. Such a resin tube is generally stored in a state of being wound around a reel (frame) in a coil shape due to a storage space or the like, and is laid out while being pulled out from the reel, for example, at the time of piping work at a site. At that time, since the tube has a curl, it is necessary to straighten it and straighten it.

[0002]

2. Description of the Related Art FIG. 8 shows a conventional recoiler used for correcting such curling of a resin tube. In the figure, a housing (frame) formed on a machine base 1
A pair of correction rollers 5A and 5B are rotatably supported in parallel on the shaft 3, and one of the rollers 5B is connected to a drive shaft of a motor M via gears 7A and 7B so as to form a drive roller. On the other hand, the roller 5A is a mere driven roller rotatably supported by a housing (frame) 3 via a bear rig, and a resin pipe P to be corrected has a circumferential groove 9A having a substantially semicircular cross section of both rollers 5A, 5B. When it passes between 9B, it is rotated by the frictional force.

In such a conventional recoiler, the pipe P drawn from the reel (frame) 11 (FIG. 1) is straightened by forcibly passing it between the straightening rollers 5A and 5B to correct the curl.

[0004]

However, in the conventional straightening device, since the feeding of the tube depends only on the frictional resistance between the two rollers, slippage occurs, and as a result, the curl is sufficiently corrected. Instead, the pipe is laid in a hole dug at the site, for example, and then a weight such as a sand bag is put on the pipe to prevent the bend from returning. for that reason,
Development of a straightening device capable of reliably correcting the curl of a coil tube has been particularly demanded from the field. In addition, it is generally necessary that the position of a buried pipe can be confirmed from the ground surface. However, in the case of a resin tube, unlike an iron tube, the location cannot be detected using an electric or magnetic inspection device. Therefore, a locator wire (electric or magnetic conductor) is attached along the tube to check the position of the buried resin coil tube from above the ground. Heretofore, the installation of the locator wire has been performed manually by an operator as a completely separate operation from the straightening of the tube. SUMMARY OF THE INVENTION An object of the present invention is to provide a straightening device for a coiled resin tube which can surely take up the winding in a single operation and can simultaneously attach a locator wire in order to satisfy such a demand. It is.

[0005]

In order to achieve the above object, a curling correction device according to the present invention comprises at least a pair of driving rollers forming a passage for passing a resin coil tube to be corrected, and the driving rollers. A pressing roller for applying a pressing force in a direction opposite to the winding direction of the coil tube passing through the coil tube, and a locator wire to be fixed on the outer periphery of the coil tube along the coil tube attached to the machine supporting the driving roller. And a reel.

[0006] One of the pair of drive rollers is connected to a drive motor, and the other drive roller is connected to the one drive roller via a gear mechanism, and rotates together therewith. Preferably, the diameter of the circumferential groove of the drive roller is slightly smaller than the diameter of the resin coil tube to be corrected. According to one embodiment, the pressing roller is swingably attached to the machine base via the support arm, and the machine base is provided with an eccentric cam with an operating lever for pressing the support arm in one direction.

[0007] A rotating ring for feeding out an adhesive tape, in which an adhesive tape for fixing a locator wire wound around the outer periphery of the resin coil tube to the outer periphery of the resin coil tube is fixed, and the rotating ring is connected to the axis of the resin coil tube. It is also possible to provide an adhesive tape feeding device having a motor that rotates concentrically downstream of the drive roller.

[0008]

FIG. 1 shows the principle of the present invention. A first feature of the present invention is that both the pair of correction rollers 15A and 15B are drive rollers. That is, in the conventional case (FIG. 8),
Only one of the straightening rollers 5B is driven, and the other
While A is a driven roller, in the present invention, both drive rollers 15A and 15B are rotationally driven at the same speed by the same drive source (motor) M via gear mechanisms 17A and 17B.

As a result, the tube is driven by both drive rollers 15A, 15A.
With B, the curl can be more reliably corrected than before. After the tube is straightened by the two drive rollers 15A and 15B, the tube is pressed by the pressing roller in a direction opposite to the bending direction, so that the tube is reliably bent. That is, in the present invention, the curling of the tube can be reliably removed by the two-stage correction of the driving rollers 15A and 15B and the pressing roller.

Also, since the straightening rollers are both driving rollers, the diameter of the circumferential groove can be made slightly smaller than the diameter of the pipe, whereby the pipe is tightened with a larger pressure to correct its curl. Can be done. The pressing roller can be pressed against the pipe with a predetermined pressing force by rotating the eccentric cam by the operating lever.

In general, it is necessary to be able to confirm the position of a buried pipe from the ground surface when expanding or laying a branch pipe or the like in the future. However, in the case of a resin tube, unlike a conventional iron tube, its location cannot be detected using an electrical or magnetic inspection device. Therefore, it is mandatory to attach a locator wire (electric or magnetic conductor) along the pipe to check the position of the buried resin coil pipe from above the ground (for gas pipes).
However, if the reel on which the locator wire is wound is attached to the machine base, the entire apparatus can be made compact.

The locator wire needs to be fixed to the outer periphery of the tube. In the present invention, an adhesive tape is used for this purpose. The adhesive tape is wound around the outer periphery of the tube by rotating the adhesive tape payout rotating ring with the adhesive tape fixedly rotated by a motor, whereby the locator wire is fixed to the outer periphery of the tube. .

[0013]

Embodiments of the present invention will be described below in detail. 1 to 5 show one embodiment of a curling correction device for a resin coil tube according to the present invention. According to this embodiment, the straightening device (recoiler) 100 of the present invention basically has a housing (frame) 13 fixedly mounted on a machine base 10 as shown in FIG. It has a pair of driving rollers 15A and 15B supported. Rotating spindle 21A, 21
B is rotatable with respect to the housing 13 by bearings 23A and 23B, respectively. The pair of drive rollers 15A and 15B are fixed to the rotating shafts 21A and 21B by keys 25A and 25B, respectively.

The drive rollers 15A and 15B have circumferential grooves 19A and 19B on the outer periphery thereof, each having a substantially semicircular cross section, and form a passage S of the pipe P between the two drive rollers. Circumferential grooves 19A, 19
The radius of B is slightly smaller than the diameter of the resin pipe P to be corrected. Therefore, the diameter of the passage S is slightly smaller than the diameter of the pipe P,
As a result, the pipe P passing therethrough can be squeezed with a strong force.

One end of the rotating shaft 21B is connected to the housing 1
3, the gear 17A is fixed to the protruding end. The gear 17A meshes with a gear B fixed to the output shaft 27 of the motor M fixed to the machine base 10. Gear 17A, 1
7B forms a well-known gear reduction gear train by appropriately changing its fractional ratio. Also, the rotating shafts 21B and 21A
Are connected via the same fixed gears 29A and 29B, so that both rotating shafts are driven to rotate at the same speed. That is, in the present invention, the straightening roller 15A,
15B are both drive rollers.

The machine base 10 is fixed in the soil at the site by, for example, an appropriate number of anchor bolts 31 as shown in FIG.
The pipe P to be corrected is wound on a reel (framework) 11 in a coil shape, and the leading end is pulled out from the reel 11 to the recoiler 100 of the present invention by an operator. After the pipe P has been once cut into the passage S between the drive rollers 15A and 15B of the recoiler 100 by an operator, the pipe P is automatically and continuously drawn out by the rotation of the drive rollers.

As shown in FIG. 1, the pipe P is laid in a state of being straightened, for example, in a burial hole H dug at a site. The recoiler 100 also has a pressing roller 35 downstream of the driving rollers 15A and 15B. The pressing roller 35 is rotatably attached to a support arm 39 that is swingably connected to the housing 13 via a pivot 37. The holding roller 35 preferably has an arc-shaped circumferential groove having a curvature corresponding to the diameter of the pipe P,
The pipe P can come into close contact therewith.

The support arm 39 has an eccentric cam 4
1 (FIG. 3) is pressed, and this eccentric cam 41 is connected to an operating lever 45 rotatably mounted on the housing 13 via a shaft 43, so that the operating lever 45 is turned clockwise in FIG. To the non-working position. In FIG. 3, the eccentric cam 41 is in an operating position for pressing the support arm 39 downward. Support arm 3
When the pipe 9 is in the operating position shown in FIG. 3, the pipe P is strongly pressed downward by the pressing roller 35. In the case of the illustrated embodiment, it is assumed that the tube P is bent upward in the vertical plane, so that the pressing direction of the tube P by the pressing roller 35 is also downward in the vertical plane. Generally, the holding roller 35
Is a direction for canceling the curl of the tube P.

By the way, in the piping work of the gas pipe and the like as described above, a conductive wire 50 called a locator wire is attached along the pipe P at a later date so that the laying place can be understood without excavating the site. Need to be kept. The locator wire 50 is wound in a coil shape on a reel 51 rotatably supported on the housing 13 via a shaft 49, for example.

An adhesive tape 53 is used to fix the locator wire 50 to the outer periphery of the pipe P. Adhesive tape 53
1 is wound around a tape reel 67 fixed to the front surface of a rotating ring 65 for feeding out an adhesive tape rotatably supported on an annular main body 63 of an adhesive tape feeding device 61 as shown in FIG. The gear 69 has a pinion 71 fixed to an output shaft 73 of a reduction motor M ′ supported by the main body 63.

That is, the rotating ring 65 is rotated at a relatively low speed by the deceleration motor M ', and as a result, is spirally wound around a pipe P extending through the center opening of the main body 63 of the tape feeding device. The locator wire 50 also extends along the tube P with the tube P in the center opening of the main body 63.
Will be fixed to the outer periphery of. Incidentally, in FIG.
Is a locator wire 5 provided at the upstream end of the main body 63.
No. 0 guide wheel.

An adhesive is applied to the inner surface of the tape 53, so that the tape 53 is spirally fixed on the outer periphery of the pipe P. Further, a pair of guide rollers 73 having the same shape as the pressing roller 35 are provided in the main body 63, for example, at positions opposed to each other in the diameter direction of the pipe P. The ghirodora 73 may be a simple idler roller and merely guides the axial delivery movement of the tube P. As a matter of course, a window 75 is formed in a portion of the main body 63 provided with the guide roller 73, and the guide roller 73 directly contacts the pipe P through the window portion 75.

The deceleration motor M 'need not always be synchronized with the drive motor M of the recoiler 100. In the embodiment shown in FIG. 1, the feeding device main body 63 is integrally attached to the machine base 10 of the recoiler 100 via left and right support plates 81. The main body 63 can adjust the inclination angle of the main body 63 with respect to the support plate 81 so that the pipe P can be sent out downward toward the hole H as shown in FIG. 1 or can be sent straight out in a horizontal direction. It is desirable. This angle adjustment can be easily realized, for example, by forming a pivot 83 for rotatably attaching the main body 63 to the support plate 81 with, for example, a loosely adjustable adjustment bolt.

FIG. 7 shows another embodiment different from FIG.
The drawing is characterized in that the feeding device main body 63 is formed integrally with the recoiler main body, and the pressing roller 35 is incorporated in the feeding device main body 63. In this case, it is also possible to take out the rotational driving force of the rotary ring 65 from the drive motor M of the recoiler 100 via an appropriate reduction gear instead of the reduction motor M '. Further, in the embodiment shown in FIG. 7, the locator wire 50 is supplied along the pipe P near the upstream end side of the feeding device main body 63. Other configurations are the same as those shown in FIG. In addition, it is possible to provide two or more sets of drive rollers along the pipe feeding direction (axial direction) as necessary.

[0025]

As described above, according to the present invention, firstly, both the correction rollers 15A and 15B are driven to rotate together, so that slippage between the correction roller 15A and the pipe P is eliminated and the correction is ensured. The tube curl can be removed. Similarly, by rotating both correction rollers 15A and 15B together, the path of the tube P formed by both drive rollers 15A and 15B can be made smaller than the diameter of the tube. Can be squeezed with great force, and curl can be effectively corrected. Further, the locator wire 50
Since it can be easily fixed to a pipe, there is a remarkable improvement in workability on site.

[Brief description of the drawings]

FIG. 1 is a front view showing a use state of a recoiler according to the present invention.

FIG. 2 is a side view of the recoiler according to the present invention.

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a plan view of FIG. 2;

FIG. 5 is a sectional view of a main body of the recoiler according to the present invention.

FIG. 6 is an enlarged perspective view showing a tape feeding device.

FIG. 7 is a front view showing another embodiment different from FIG. 1;

FIG. 8 is a view similar to FIG. 5, showing a conventional recoiler.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Machine stand 13 ... Housing 15A, 15B ... Driving roller 19A, 19B ... Peripheral groove 35 ... Holding roller 53 ... Adhesive tape 61 ... Tape feeding device 65 ... Rotating ring

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shiro Aruga 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Inside Nippon Kokan Co., Ltd. (72) Inventor Yasushi Yasuyama 4-6-1, Shinmori, Asahi-ku, Osaka-shi, Osaka No. (56) References JP-A-1-53992 (JP, A) JP-A-1-137218 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B29C 53/16-53 / 20 B29L 23:00

Claims (6)

(57) [Claims] At least one pair of drive rollers (15A, 15A, 15C) forming a passage for passing a resin coil tube (P) to be corrected.
15B) and a pressing roller (35) for applying a pressing force in a direction opposite to the winding direction to the coil tube passing through the driving roller.
And a reel (51) on which a locator wire (50) to be fixed on the outer periphery of the coil tube is mounted on a machine supporting the drive roller, and is wound around the coil tube. Curling straightening device. 2. One (15A or 15B) of the pair of drive rollers is connected to a drive motor, and the other drive roller (15B or 15A) is connected to the one drive roller via a gear mechanism (29A, 29B). 2. The curl correction device according to claim 1, wherein the curl correction device is connected to the shaft and rotates in the same direction. 3. The drive roller according to claim 1, wherein the drive roller has a circumferential groove (19A, 19B) having a substantially semicircular cross section, the diameter of which is slightly smaller than the diameter of the resin coil tube to be corrected. 3. The curl correction device according to 2. 4. The device according to claim 1, wherein the pressing roller and the driving roller are provided on the same machine base.
4. The curl correction device according to 2 or 3. 5. The press roller (35) is swingably mounted on a machine base via a support arm (39), and the machine base has an eccentric cam (41) with an operating lever for pressing the support arm in one direction. The curl correction device according to claim 4, wherein a curl correction device is provided. 6. A rotating ring (65) for feeding an adhesive tape, to which an adhesive tape (53) for fixing a locator wire wound around the outer periphery of the resin coil tube to the outer periphery of the resin coil tube is fixed. 2. A straightening device as claimed in claim 1, further comprising an adhesive tape feeding device having a motor (M ') for concentrically rotating the shaft with respect to the axis of the resin coil tube. apparatus.