JPS63299821A - Device for straightening end part of pipe - Google Patents

Abstract

PURPOSE:To enable simple straightening of a pipe having an internal shear droop with good accuracy by constituting a device in such a manner that a cylindrical body is rotated relatively with a main spindle by rotation of a roller pin and a ring gear rotates a sector gear. CONSTITUTION:A roller 16 of the roller pin 4 moves as well if a piston 2 is moved by operating a driving part 3 of a shifter device 1. Since a long hole 21 of the main spindle 21 is provided in the same direction as the moving direction of the piston 2, the spindle 5 rotates integrally with the piston 2. Since the cylindrical body 6 is provided with a long hole 22 inclining from the axial direction, the roller 16 cannot move as it is and rotates differently from the main spindle 5 as the piston 2 moves. The sector gear 8 pivotally supported on the main spindle 5 side is rotated by the ring gear 7 and deviates the center B of an eccentric cam 10 on the same axis to a center B' thereby bringing a press roller 11 to the outermost side. The contact by the roller 11 is, therefore, started and the internal shear droop part of the pipe P to be straightened receives force in the direction where the pipe is diametrally expanded but the outside circumference is held by a guide part 13.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a pipe end straightening device, and more particularly to a pipe end straightening device for straightening the end of the pipe that occurs when the pipe is cut. .

(Prior art) Conventional pipe cutting devices include those that cut the pipe by holding the pipe at appropriate intervals in the longitudinal direction and gradually pressing it from one side with a disk cutter while rotating, and those that cut the pipe by holding the pipe in the middle. It is known that the diameter of the vibrator is reduced by the thickness of the vibrator while being pressed from three directions around the outer circumference using a disc cutter.

The end face of the vibrator cut in this way does not sag when the diameter is small, for example, about 20 to 50 φ, but when the end face is large, such as 100 φ, 200 φ, 30° φ or more, the end face of the vibrator is shown in Fig. 5. As shown in the cross section, the inward sag a is unavoidable.

(Problem to be solved by the invention) However, if such internal sag occurs, the diameter of the end face becomes smaller by the amount of the internal sag, which poses a problem during use. The sag must be removed by cutting off the sagging length using another method, or by manually correcting it as shown by the dotted line in Figure 5.

However, in order to newly cut off the inner sag, a cutting device is required, which increases the number of man-hours, and there are problems such as the amount of pipe material that is cut off is wasted.

Therefore, to avoid this, correction is done manually, but the larger the diameter of the vibrator, the more man-hours it takes.
In order to improve the accuracy of correction, extremely skill was required.

In view of this, it is an object of the present invention to provide a vibrator end correction device that can easily and accurately correct a vibrator that has become sagging, and is easy to operate.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the object described in item 1, the present invention provides a shifter device that includes a roller bin and moves the roller bin in the axial direction;
A main shaft having an elongated hole in which the roller bin is fitted is provided in the axial direction, rotates integrally with the main shaft, and has a rotation transmission member from a drive motor fixed on one side, and an elongated hole in which the roller bin is fitted is provided in the axial direction. a cylindrical body fitted onto the main shaft so as to be inclined relative to the main shaft and rotate relative to the main shaft; an annular gear fixed to an end of the cylindrical body; and a plurality of sector gears meshing with the annular gear; An eccentric cam provided on the shaft of the sector gear pivotally supported on the outside of the main shaft, an annular pressing roller provided on the outer periphery of the cam, and one side of the main shaft and the other side of the cylinder respectively pivotally supported. and a machine frame provided with a guide portion for holding the tip of the vibrator to be corrected at the end facing the pressing roller, and the roller bin is moved in the axial direction by operating the shifter device. When the roller bin moves, the cylindrical body rotates relative to the main shaft, and the annular gear rotates the sector gear to rotationally deviate the eccentric cam so that the pressing roller and the vibrator to be corrected can be moved into and out of contact with each other. It is characterized by

(Function) By adopting such a configuration, the rotation from the drive motor is transmitted to the rotation transmission member, and as a result, the main shaft rotates, but the main shaft has a roller bin fitted in the elongated hole. Also, since the roller bin is fitted into the elongated hole in the cylindrical body,
The main shaft and the cylinder rotate together as one. Therefore, there is a ring gear fixed to the end of the cylinder, a sector gear meshing with the ring gear, an eccentric cam eccentrically installed on the axis of the sector gear, and a pressing roller installed around the cam. rotate as one without changing their positional relationships.

In this state, when the shifter device that moves the roller bin regardless of rotation is activated, the main shaft that is fitted with the roller bin in the long hole will move because the long hole is provided in the axial direction in the same direction as the movement of the roller bin. , the roller bin moves within the long hole without resistance and continues to rotate together with the roller bin, but since the cylindrical body has a long hole diagonal to the axial direction, the movement of the roller bin causes relative rotation with the main shaft. I will do it.

Therefore, the rotation of the annular gear of the cylindrical body causes the sector gear to rotate through meshing, thereby also rotating the shaft of the sector gear pivotally supported on the other side of the main shaft.

Since the eccentric cam provided on this shaft rotates and is displaced at the same time, the pressure roller provided on the outer periphery of this cam also moves up and down due to this displacement.

Accordingly, after the tip of the vibrator to be corrected is inserted into the guide portion at the end of the machine frame, the pressure roller is raised from the inner peripheral side to press the sagging portion, thereby correcting the sagging portion.

(Example) The present invention will be described below with reference to an example shown in FIGS. 1 and 4.

As shown in FIG. 1, the pipe end straightening device according to the present invention includes a shifter device 1 comprising a roller pin 4, a piston 2 for moving the roller pin 4 in the axial direction, and a drive section 3; A main shaft 5 on which the piston 2 is fitted, a cylinder 6 on which the main shaft 5 is fitted, and an annular gear 7 fixed to the cylinder 6.
, a plurality of sector gears 8 meshing with the annular gear 7, an eccentric cam 10 provided on the shaft 9 of the sector gear 8, a pressing roller 11 fitted onto the eccentric cam 10, and a machine frame 1 housing these members.
The guide portion 13 is provided at the end of the pipe P into which the tip of the pipe P to be corrected is inserted.

The piston 2 has a cylindrical shape that can move within a main shaft 5 that is fitted onto the piston, and has a small diameter portion 2A at one end.

These two small diameter parts are connected to a hydraulic cylinder or a joint part 3B on the piston part 3A side of the manual drive part 3 via bearings 14 and 15.

A roller pin 4 is provided in the intermediate portion of the piston 2, passing through in the diametrical direction and protruding beyond the outer periphery, and a roller 16 is fitted onto the pin 4 at the protrusion.

A rotation transmission member 17 such as a pulley is fixed on the negative side of the main shaft 4 via a key or the like, and this transmission member 17 is connected to a pulley 19 directly connected to a separately provided drive motor 18 such as a belt 20 or the like. It is now possible to rotate.

Further, the main shaft 5 is formed almost in a cylindrical shape except for a part, and a long hole 21 is provided in the middle part on both sides along the axial direction XX. The roller 16 of the roller pin 4 is fitted into the elongated hole 21 so as to be movable within the elongated hole 21.

The cylindrical body 6 is externally fitted onto the main shaft 5, and has an axial direction X- on the - side.
A long hole 22 inclined at an appropriate angle with respect to x is provided, and the roller 16 of the roller pin 4 fits into this long hole 22 so that it can move within this long hole 22.

Therefore, even if the rollers 16 are fitted into the long holes 21 and 22, the main shaft 5 and the cylinder 6 can rotate together if the rollers 16 do not move, but if the rollers 16 move, that is, the piston 2 moves, This is a relative rotation.
' On the other side of the cylinder 6, flanges 6A and 5A are respectively formed which are enlarged concentrically with the other side of the main shaft 5, and the flange 6A of the cylinder 6 is also fitted onto the flange 5A of the main shaft 5. .

An internally toothed ring gear 7 is fixed to the end of the flange 6A of the cylinder 6.

Further, three sector gears 8, 8°8 are meshed with this ring gear 7.

The shaft 9 of the sector gear 8, 8.8 is rotatably supported by a pair of bearing plates 23.24 fixed to the end face of the flange 5A of the main shaft 5 via bearings 25, 26.

The bearing plates 23 and 24 are held at a constant interval by mounting bolts 27, etc., and the eccentric cam 10 fixed to the shaft 9
is provided between them, and the center A of the shaft 9 and the center B of the cam 10
This means that it occupies an eccentric position. A pressing roller 11 is fitted around the outer periphery of the eccentric cam 10.

The cylinder 6 is connected to the machine frame 12 on the other side where the long hole 22 is not provided, and the main shaft 5 is connected to the machine frame 12 on the other side where the cylinder 6 is not externally fitted.
The main shaft 5 and the cylinder body 6 are rotatably attached to the machine frame 12 by means of bearings 28 and 29 provided therein.

At the end of the machine frame 12, there is a cylindrical guide part 1 into which the tip of the pipe to be straightened is inserted and the outer circumference of the pipe is held during straightening.
3 is provided at a position facing the pressure roller 11.

Next, the operation will be explained.

First, the end of the pipe P that is sagging in the guide part 13 at the end of the machine frame 12 and should be corrected is moved inward by the pressing roller 1.
1 to the facing position. At this time, the pressure roller 11
Do not touch the inside of the pipe yet.

When the drive motor 18 is driven to rotate the rotation transmission member 17 such as a pulley from the direct pulley 19 via the belt 20, the main shaft 5 is rotated. As the main shaft 5 rotates, the piston 2 and cylinder 6 rotate together by the roller pin 4, and as a result, the annular gear 7 fixed to the cylinder 6 also rotates, but only revolves around the sector gear 8°8.8. Therefore, the eccentric cam 10 provided on the shaft 9 of the sector gear 8 and the pressure roller 11 fitted onto the cam 10 maintain the same relative position, and are in contact with the vibrator P to be corrected. is not.

To perform the correction work from this state, operate the drive unit 3 of the shifter device 1 to move the piston 2 to the right in the first figure, the roller 16 of the roller pin 4 will also move, but the elongated hole in the main shaft 5 will move. 21 is provided in the same direction as the movement of the piston 2, so the main shaft 5 rotates together with the piston 2.

However, since the elongated hole 22 of the cylinder 6 is inclined with respect to the axial direction The sector gear 8 pivotally supported on the 5th side is rotated by the annular gear 7, thereby causing the center B of the eccentric cam 10 on the same axis to be eccentric to the center B' as shown in FIG.
The pressure roller 11 is positioned at the outermost position.

Therefore, contact by the pressing roller 11 begins, and the sagging part of the vibrator P to be corrected receives a force in the direction of expanding the diameter of the vibrator, but since the outer periphery is held down by the guide part 13, the correction is performed to the correct size. It is done.

After the correction is completed, the eccentric cam 10 is eccentrically moved from the center B' to the center B by the reverse operation to release the pressure of the roller 11, and then the vibrator P is removed from the guide portion 12.

Although the above description has been made assuming that the guide portion 13 is fixed, it may be configured to be able to contract or expand depending on the diameter of the vibrator.

Furthermore, although the eccentricity of the eccentric cam 10 relative to the length of the elongated hole 21 and 22 has been explained from the maximum to the minimum (as shown in Figure 4), depending on the diameter and wall thickness of the vibrator, it may sag in the middle of the eccentricity. Needless to say, the direction of the elongated hole in the cylindrical body is not limited to that shown in the embodiment.

Furthermore, although the shift amount of the shifter device is not particularly limited in this embodiment, the rod portion of the piston is extended to the opposite side of the piston, and the position of the start of movement and the line of movement are detected by this extended rod portion. A limit switch or the like may be provided to automatically detect the shift amount (length).

The sick device in this embodiment is shown in which the roller pin, which is moved by the operation of the drive unit, protrudes from the outer periphery of the piston provided in the main shaft, but the roller pin is attached to a movable member provided outside the cylinder. The movable member may be fixedly installed so that when the movable member is moved by the operation of the drive unit, the movable member is moved within the cylinder inside the movable member and the elongated hole of the main shaft.

(Effects of the Invention) As explained above, the present invention rotates the cylindrical body relative to the main shaft by operating the shifter device, and the rotation of the annular gear provided on the cylindrical body rotates the sector gear provided on the main shaft to form a fan shape. The eccentric cam that is coaxial with the gear shaft is eccentric, and the pressure roller fitted on the eccentric cam is used to correct the sagging that occurs at the end when cutting the vibrator, so the vibrator with the sagging can be moved to the guide section. After insertion, straightening can be done in a short time by simply operating the shifter device, and it has excellent effects such as a clean finish and high precision.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing the end correction device of a vibrator according to the present invention, Fig. 2 is a plan view showing the relationship between the main shaft and the elongated hole of the cylindrical body according to the present invention, and Fig. 3 is a cross-sectional view showing the end correction device of a vibrator according to the present invention. FIG. 4 is a side view showing the relationship between gears and sector gears, FIG. 4 is an explanatory diagram showing the movement relationship between the eccentric cam and the pressing roller of the present invention, and FIG. It is the 1st side. DESCRIPTION OF SYMBOLS 1... Shifter device, 2... Piston, 3... Drive part, 4... Roller pin, 5... Main shaft, 6... Cylindrical body, 7... Annular gear, 8... Sector gear, 9 shafts,
10... Eccentric cam, 11... Press roller, 12...
・Machine frame, 13...Guide part, 16...Roller, 17
... Rotation transmission member, 18 ... Drive motor, 21.2
2...Long hole, 23.24...Bearing plate, 25.26,
28.29...Bearing, P...Pipe. Applicant's representative Mr. Sato Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A shifter device comprising a roller pin and moving the roller pin in the axial direction, a long hole in the axial direction into which the roller pin is fitted and rotates integrally therewith, and a rotation transmission member from a drive motor is fixed to one side. a cylindrical body having an elongated hole in which the roller pin is fitted, the cylindrical body being externally fitted on the cylindrical body so as to be rotatable relative to the axial direction; a ring gear, a plurality of sector gears meshing with the ring gear, an eccentric cam provided on the shaft of the sector gear pivotally supported on the other side of the main shaft, and an annular pressure roller provided on the outer periphery of the cam. and a machine frame that pivotally supports one side of the main shaft and the other side of the cylindrical body, and includes a guide portion that holds the outer periphery of the tip of the pipe to be straightened at the end facing the pressing roller. When the shifter device is operated to move the roller pin in the axial direction, the cylinder body rotates relative to the main shaft due to the movement of the roller pin, and the annular gear rotates the sector gear, causing the eccentric cam to be rotated eccentrically. A pipe end straightening device characterized in that a pressure roller and a pipe to be straightened can be freely moved into and out of position.