JPH0646576Y2 - Pipe end groover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention, when applying a joint to a pipe end of a pipe for guiding a fluid such as a gas pipe and a water pipe, press-molds an annular peripheral groove on a wall around the pipe end. To a pipe end grooving device.

[Conventional technology]

As is well known, various pipe joints are used in pipe laying work such as gas pipes or water pipes, and an annular peripheral groove is formed in the peripheral wall of the pipe end in such joints. There are those that require. That is, such a joint is provided with an engagement portion adapted to mechanically engage the annular peripheral groove of the pipe end, whereby a mechanical connection between the joint and the pipe end is achieved. is there. Therefore, when using such a type of joint, it is necessary to appropriately form an annular peripheral groove on the end of the pipe cut to an appropriate size at the pipe laying site.

As a pipe end grooving device used for forming such an annular peripheral groove, an annular grooved drive roller and a front and rear direction with respect to the annular grooved drive roller so as to engage with the annular groove of the annular grooved drive roller. It is known to include a rotary driven roller that can move in any direction. In such a pipe end groover, the rotary driven roller is gradually inserted into the annular groove of the annular grooved drive roller with the pipe end wall sandwiched between the annular grooved drive roller and the rotary driven roller. By pushing, the annular peripheral groove is press-formed on the peripheral wall of the tube end. More specifically, an annular grooved drive roller is applied to the inner wall surface of the tube end, while a rotary driven roller is applied to the outer wall surface of the tube end so that the tube end wall is formed between the annular grooved drive roller and the rotary driven roller. Will be sandwiched between.
When the annular grooved drive roller is rotationally driven in such a state, the tube is rotated in such a manner that the annular grooved drive roller rolls on the inner wall surface of the tube end, and at this time, the rotary driven roller is rotated. When it is gradually pressed toward the annular grooved drive roller so as to enter the annular groove, it is sandwiched between the annular grooved drive roller and the rotary driven roller, and the portion of the pipe end wall is plastically deformed. As a result, an annular peripheral groove is formed at the pipe end.

[Problems to be solved by the device]

Now, it is not possible to immediately install the joint on the pipe end where the annular peripheral groove is press-formed by the pipe end grooving device as described above. This is because it is necessary to polish the peripheral wall surface of the tube end, that is, the peripheral wall surface between the end surface and the annular peripheral groove. More specifically, since the surrounding wall surface functions as a sealing surface when a fitting is attached to the pipe end,
This is because if the polishing process is omitted, the problem of leakage of fluid such as gas and liquid will occur. In short, when a joint that requires pipe end grooving is used, in addition to grooving work, polishing work on the wall surface around the pipe end is also required, which is a major obstacle to improving the efficiency of pipe laying work. It is pointed out as a factor.

Therefore, an object of the present invention is to provide a pipe end grooving device capable of not only grooving the pipe end but also polishing the wall surface around the pipe end at the same time, thereby improving the efficiency of pipe laying work.

[Means for Solving the Problems]

To this end, a pipe end grooving device according to the present invention includes an annular grooved drive roller, and a front and rear direction with respect to the annular grooved drive roller so as to engage with the annular groove of the annular grooved drive roller. A rotary driven roller that is movable in any direction, and the rotary driven roller is annular groove of the drive roller with the annular groove with the tube end wall sandwiched between the roller with the annular groove and the rotary driven roller. By gradually pushing it in, an annular peripheral groove is pressed into the peripheral wall of the tube end. According to the invention, such a pipe end grooving device is characterized in that it is provided with polishing means for polishing the pipe end peripheral wall during press forming of the annular peripheral groove.

[Action]

As is apparent from the above-mentioned configuration, in the pipe end groove grooving device according to the present invention, the pipe end peripheral wall is polished by the polishing means while the annular peripheral groove is pressed and formed on the pipe end. The attaching process and the polishing process of the wall surface around the pipe end are simultaneously achieved.

〔Example〕

An embodiment of the pipe end groover according to the present invention will now be described with reference to FIGS. 1 to 3 of the accompanying drawings.

Referring to FIGS. 1 and 2, the whole pipe end grooving device according to the present invention is shown as a front view and a side view, respectively, the base end grooving device having a substantially rectangular shape. It is equipped with. Three legs 12 extend from the bottom of the base plate 10, and these three legs 12 allow the base plate 10 to be stably installed even in a pipe laying site where the footing is poor.

A grooving device main body 14 is placed on the base plate 10, and the grooving device main body 14 includes a frame housing 16. The front side wall surface of the frame housing 16 (that is, the first
The shaft is projected from the wall surface shown in the figure, and the drive roller 18 with an annular groove is attached to the nut at the protruding end of this shaft.
Fixed by 20. The shaft is rotatably held by a suitable bearing in frame housing 16 and is operatively connected to the output shaft of a suitable drive motor. Although the annular grooved drive roller 18 can be rotationally driven in any direction, in this embodiment, the rotational drive direction of the annular grooved drive roller 18 is the clockwise direction, that is, the clockwise direction when viewed from the front thereof (FIG. 1). It is said that Incidentally, such a drive motor is arranged in a motor housing portion 16b forming a part of the frame housing 16, and its start and stop are performed by a switch board 32 provided on a side wall of the frame housing 16.
This is performed by the ON switch button 32a and the OFF switch button 32b.

As is apparent from FIG. 2, the frame housing 16 includes an overhanging protruding portion 16a that extends above the annular grooved drive roller 18 in the form of an overhang, and a hydraulic piston cylinder 22 is attached to the top of this protruding portion 16a. . The actuating rod of the hydraulic piston cylinder 22 penetrates the top wall of the overhanging portion 16a and extends vertically downward on the drive roller 18 with an annular groove.
Of the rotary driven roller 24 at its lower end.
Is pivoted. That is, a bearing holder 26 (Fig. 2) is attached to the lower end of the operating rod of the hydraulic piston cylinder 22, and the rotary driven roller 24 is axially attached to the bearing holder 26.

The hydraulic piston cylinder 22 is a mounting bracket on the base plate 10.
Hydraulic supply cylinder 28 and hydraulic hose mounted on 25
The hydraulic driven cylinder 28 connected to the hydraulic supply cylinder 24 moves the operating rod of the hydraulic piston cylinder 22 up and down by operating the hydraulic operating lever 28a of the hydraulic supply cylinder 24. And is capable of entering the annular groove 18a of the annular grooved drive roller 18.

The working rod of the hydraulic piston cylinder 22 is incorporated with a vertical rod element 22a that moves up and down accordingly, and the upper end of this vertical rod element 22a penetrates the top wall of the frame housing 16 and is projected to the outside (Fig. 2). ). The protruding upper end of the vertical rod element 22a is threaded, and the stopper element 22b is screwed therein. That is, the stopper element 2
The lower flange portion of 2b abuts against the top wall of the frame housing 16, which restricts the downward stroke of the operating rod of the hydraulic piston cylinder 22.
Regarding the downward stroke, the vertical rod element
It can be adjusted by changing the screwing position of the stopper element 22b with respect to 22a.

The configuration described above is substantially the same as in the case of the conventional pipe end grooving device, in which the pipe end is grooved by the annular grooved drive roller 18 and the rotary driven roller 24 as described later. However, according to the present invention, polishing means is provided for polishing the wall surface around the tube end during grooving of the tube end.

In this embodiment, the polishing means is configured as a belt sander 34, and the belt sander 34 has a motor driving portion 34a, and a large diameter pulley that is rotationally driven by a motor is provided in the motor driving portion 34a. An arm portion 34b extends from the motor drive portion 34a of the belt sander 34, and a small diameter pulley 34c is attached to the tip thereof. An endless polishing belt 34d is provided between the large-diameter pulley and the small-diameter pulley 34c in the motor drive unit 34a.
The endless polishing belt 34d is run by being driven by a large-diameter pulley. As shown in FIG. 1, the handle portion is provided on the opposite side of the arm portion 34b from the motor driving portion 34a.
34e also extends, and the handle portion 34e is provided with an ON / OFF switch button 34f for the motor in the motor drive portion 34a.

In this embodiment, the belt sander 34 is supported by the mounting bracket 25 of the hydraulic supply cylinder 28 in a cantilever manner. At this time, the endless polishing belt 34d has the annular grooved drive roller 1
It is arranged so that it can take approximately the lower position of 8. More specifically, as shown in FIG. 2, a holder member 36 is attached to the vertical wall portion of the mounting bracket 25.
A shaft portion extending from the casing of the motor drive portion 34a is inserted therethrough. A hole 36a is formed in the holder member 36, and the hole 3a
A stop notch is attached to 6a, the tip of which is engaged with the peripheral groove of the shaft, whereby the shaft is held by the holder member.
It is rotatably held inside the 36 so that it does not come out.

Next, with reference to FIG. 3, the operation of the pipe end groover described above will be described.

As shown in FIG. 3, after the pipe P to be grooved is installed in such a manner that the annular grooved drive roller 18 is inserted into its pipe end, the rotary driven roller 24 is lowered, whereby The tube end wall is sandwiched between the annular grooved drive roller 18 and the rotary driven roller 24. In this state, when the annular grooved drive roller 18 is rotationally driven in the clockwise direction, that is, the clockwise direction (in FIG. 1), the pipe P causes the annular grooved drive roller 18 to roll on the inner wall surface of the pipe end. Can be rotated in various ways. At this time, the other end of the pipe P is manually held by a person, or is rotatably held by an appropriate holder.

Then, when the rotary driven roller 24 is gradually lowered so as to enter the annular groove 18a of the driving roller 18 with the annular groove, an annular groove as shown in FIG. 3 is formed on the pipe end peripheral wall of the pipe P. Will be done. On the other hand, at this time belt sanda 34
Is driven to drive the endless polishing belt 34d counterclockwise (in FIG. 1) and the handle portion 34e is manually operated to show the upper running portion of the endless polishing belt 34d in FIG. As described above, the pipe end peripheral wall of the pipe P is brought into contact with the pipe P, whereby the pipe end peripheral wall of the pipe P is grooved and simultaneously polished.

Although the belt sander 34 is used as the polishing means in the above-described embodiments, other polishing means such as a rotary polishing machine may be used, or sandpaper or the like is elastically pressed against the wall around the pipe end of the pipe P. You may arrange so.

[Effect of device]

As is clear from the above description, in the pipe end grooving device according to the present invention, since the grooving work and the polishing work are simultaneously performed on the pipe end peripheral wall, the efficiency of the pipe laying work is improved. Will be done.

[Brief description of drawings]

FIG. 1 is a front view of the pipe end grooving device according to the present invention, FIG. 2 is a side view of the pipe end grooving device of FIG. 1, and FIG. 3 is a view for explaining the operation of the pipe end grooving device according to the present invention. FIG. 10 ... Base plate 12 ... Legs 14 ... Grooving device body 16 ... Frame housing 18 ... Annular grooved drive roller 18a ... Annular groove 22 ... Hydraulically actuated piston cylinder 24 ... Rotational drive roller 28 ... Hydraulic supply cylinder 34 ... Belt sander 34d … Endless polishing belt

Claims (1)

[Scope of utility model registration request] 1. A drive roller having an annular groove, and a rotary driven roller which is movable in the front-rear direction with respect to the drive roller having the annular groove so as to engage with the annular groove of the drive roller having the annular groove. A pipe end periphery is provided by gradually pushing the rotary driven roller into the annular groove of the annular grooved drive roller with the tube end wall sandwiched between the annular grooved roller and the rotary driven roller. In a pipe end grooving device for pressingly forming an annular peripheral groove on a wall, polishing means for polishing the pipe end peripheral wall during press forming of the annular peripheral groove is provided. Attachment device.