JP2022174963A - Pipe end surface restrictor and flare-forming tool using the same - Google Patents

Abstract

To provide a flare-forming tool easy to use and capable of securely matching an end surface of a pipe inserted into a gauge bar and an upper surface of the gauge bar.SOLUTION: A flare forming tool A includes: a gauge bar 22 having a plurality of pipe holding holes 40 for holding an end of a metal pipe P; a yoke body 24 which is attached to the gauge bar 22, slides along a longitudinal direction thereof, and holds a conical eccentric cone 16 that presses the end of the metal pipe P against a flare processing surface 41 of the pipe holding hole 40 to form a flare; and a pipe end surface restrictor 1 that matches an end surface T of the metal pipe P with an upper surface 22 of the gauge bar 22 formed with the flare processing surface 41. The pipe end surface restrictor 1 has a size protruding into the pipe holding hole 40 opening in the upper surface 22j of the gauge bar 22, and comprises: a pipe end restriction piece 2 in contact with the end surface T of the metal pipe P inserted into a selected one of the pipe holding holes 40 from the lower surface side; and magnetism or a magnet 5 to be magnetically attracted onto the gauge bar 22.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to an improved pipe end face restrictor used when flaring the end of a metal pipe, and a flare forming tool using the improved restrictor.

Conventionally, when connecting the indoor unit and the outdoor unit of an air conditioner, it was necessary to expand the diameter of the end of the metal pipe into a conical shape. It is

A conventional flare forming tool includes a rotary handle, a cone shaft fixed to the rotary handle and provided with a cone mounting portion at its lower end, rotating integrally with the rotary handle, and a flare shaft provided on the lower surface of the cone mounting portion. An eccentric cone for processing, a feed screw that is coaxially attached to the cone shaft between the rotating handle and the cone attachment part, and has a male thread engraved on the outer peripheral surface, and a plurality of pipes with different diameters. a gauge bar having a hole; a yoke body having a female thread on the upper part thereof into which the male thread of the feed screw is screwed; and a tightening clamp for fixing the gauge bar inserted through the gauge bar sliding groove to the yoke body.

When flaring using this flare forming tool, open the gauge bar to the left and right, insert the end of the pipe into the pipe holding hole of the gauge bar that matches the size of the pipe to be flared, and visually check the gauge bar. Close the gauge bar by aligning the end face of the pipe with the upper surface of the flare forming tool, move the yoke body of the flare forming tool over the pipe holding hole where the pipe is held, turn the clamp handle to lower the eccentric cone, and close the eccentric cone While rotating on the inner surface of the end of the pipe, the part is pressed against the flared surface provided at the opening of the pipe holding hole and the end is expanded in an inverted conical shape to form a flare at the tip of the pipe. is doing.

At this time, if the upper surface of the gauge bar on the eccentric cone side does not match the end surface of the pipe held in the pipe holding hole of the gauge bar, an accurate flare cannot be formed. In particular, in the case of visual observation, inconsistency tends to occur. Therefore, there has been proposed a flaring tool provided with a pipe end face restrictor that brings the end face of the pipe into contact with the upper surface of the gauge bar by abutting the end face of the pipe before flaring (Patent Document 1).

Utility Model Registration No. 3198457

The pipe end face restrictor of the flare forming tool described in Patent Document 1 is a U-shaped member that is slidably fitted to the gauge bar so as to hold the upper and lower faces from one side of the gauge bar. A pipe end regulating piece, which is an upper piece of the pipe end face regulating tool that slides along the upper surface of the gauge bar, is formed to have a length that closes the pipe holding hole that opens to the upper surface of the gauge bar from the sliding side surface of the gauge bar. On the other hand, the lower surface piece that slides along the lower surface of the gauge bar is provided with guide claws or guide pins that are slidably fitted into guide grooves provided in the lower surface of the gauge bar in the longitudinal direction. The guide groove is dug between one side surface and the pipe holding hole on the back side of the gauge bar.

When using the flare forming tool, the end face of the pipe inserted into the pipe holding hole of the gauge bar is abutted against the pipe end regulation piece of the pipe end face regulator so that the upper surface of the gauge bar and the end face of the pipe are aligned, and then flared. Then, move the gauge bar to align the center of the pipe with the tip of the lower end of the eccentric cone, turn the handle in this state, and perform flaring as described above.

However, the flare forming tool described in Patent Document 1 has the following problems.
(a) In order to mount the pipe end face restrictor, it is necessary to mill a new guide groove that did not originally exist in the gauge bar, which leads to an increase in cost. gauge bar is not available. A dedicated gauge bar is required.
(b) In order to prevent the pipe end face restrictor from coming off the gauge bar, it is necessary to have the guide groove, a guide pin that slides in the guide groove, and a folded guide claw.
(c) In order for the pipe end face restrictor to slide smoothly along the gauge bar while being guided by the guide groove, a certain amount of clearance is required between the pipe end face restrictor and the gauge bar. When the pipe is inserted from below into the pipe holding hole of the gauge bar and the end face of the pipe abuts against the pipe end regulation piece of the pipe end face regulation tool for pipe end positioning, the pipe end regulation piece is lifted by this clearance. The tube end regulating piece is separated from the upper surface of the gauge bar only by the distance, which leads to poor flaring.
(d) The pipe end face restrictor is attached to the gauge bar so as to slide lightly, and there is no fixing means. may depart from
(e) Since the guide groove is provided along one lower side of the gauge bar, the pipe end face restrictor can only be attached to the side where the guide groove is provided. In other words, it is inconvenient because both sides of the gauge bar cannot be used depending on the situation at the construction site.

The present invention has been made in view of the problems of the conventional example. To provide a pipe end face restrictor which can be used in a simple manner and can surely match the end face of a pipe inserted into a gauge bar with the upper surface of the gauge bar, and to provide a flare forming tool equipped with the restrictor.

The invention described in claim 1 (Figs. 5 to 7) is
A gauge bar 22 penetrating from the lower surface to the upper surface 22j and having a plurality of pipe holding holes 40 for holding the ends of the metal pipes P is provided, and the gauge bar 22 is slidably held and any pipe of the gauge bar 22 is provided. A pipe end face restrictor 1 used in a flare forming tool A for flaring the end of a metal pipe P held in a holding hole 40,
The pipe end face restrictor 1 has a size protruding into the pipe holding hole 40 along the upper surface 22j of the gauge bar 22, and the metal pipe inserted into the selected pipe holding hole 40 from below. It is characterized by having a pipe end regulating piece 2 with which the end face T of P abuts, and a magnet 5 magnetically attracted to the gauge bar 22 .

Claim 2 relates to the pipe end face restrictor 1 described in Claim 1 (Figs. 5 and 6),
The pipe end face restricting tool 1 includes the pipe end restricting piece 2, a side piece 3 arranged along one side surface of the gauge bar 22, and a lower surface piece 4 arranged along the lower surface of the gauge bar 22. The upper end of the side piece 3 is connected to one end of the tube end regulation piece 2, and the lower end of the side piece 3 is connected to one end of the lower surface piece 4. do.

Claim 3 relates to the pipe end face restrictor 1 described in Claim 1 (Fig. 7),
The pipe end face restrictor 1 is composed of the pipe end restricting piece 2 and a side piece 3 arranged along one side surface of the gauge bar 22 , and the upper end of the side piece 3 is the pipe end restricting piece 2 characterized by being connected to one end of the

The invention described in claim 4,
a gauge bar 22 penetrating from the lower surface to the upper surface 22j and having a plurality of pipe holding holes 40 for holding the ends of the metal pipes P; A yoke body 24 holding a conical eccentric cone 16 that presses the end of the pipe P against the flared surface 41 of the pipe holding hole 40 to form a flare, and a yoke body 24 that slides along the longitudinal direction of the gauge bar 22, A flare forming tool A comprising the pipe end face restrictor 1 according to any one of claims 1 to 3, wherein the end face T of the metal pipe P is aligned with the upper surface 22j of the gauge bar 22 on which the flared surface 41 is formed. be.

According to the present invention, since the pipe end face restrictor 1 is magnetically attracted to the gauge bar 22, even if the end face T of the metal pipe P abuts against the pipe end restricting piece 2, the abutment force causes positional deviation. The end surface T can be reliably matched with the upper surface 22j of the gauge bar 22 without any gaps.

1 is a perspective view showing a flare forming tool according to the present invention; FIG. FIG. 2(a) is a vertical cross-sectional view taken along line X-X' in FIG. 1 during flare processing, and (b) is a partial cross-sectional view of the relationship between a locking pin and an engaging/releasing hole viewed from direction B. FIG. 2 is an enlarged vertical cross-sectional view taken along line XX' before or after flaring processing in FIG. 1; FIG. FIG. 4 is a partially enlarged view of a gauge bar fitted with the pipe end face restrictor of the first embodiment; (a) A longitudinal sectional view showing the mounting state of the first embodiment of the pipe end face restrictor, (b) a plan view of the pipe end face restrictor, and (c) a bottom view of the pipe end face restrictor. It is a longitudinal cross-sectional view which shows the mounting state of 2nd Embodiment of a pipe end face control tool. It is a longitudinal cross-sectional view which shows the mounting state of 3rd Embodiment of a pipe end face control tool.

A flare forming tool A according to an embodiment of the present invention will be described in detail below with reference to the drawings. The flare forming tool A is generally composed of a gauge bar 22, a yoke body 24, a pipe end face restrictor 1, and a mechanical portion 20. As shown in FIG.
The mechanism section 20 is composed of the rotating handle 12, the cone shaft 14, the eccentric cone 16, the feed screw 18, the pressing spring 26, and the like.

The rotating handle 12 has a circular block-like outer shape, and six grip portions 12a protrude outward at equal angular intervals around it (see FIG. 1).
A driver hole 12b having a rectangular cross section is recessed in the center of the upper surface of the rotary handle 12 so as to be aligned with the axis, and a shaft mounting hole 12c having a circular cross section coaxial with the driver hole 12b is provided on the lower surface. 12b and formed in communication therewith.

In the vicinity of this shaft mounting hole 12c, a locking pin holding hole 12d is drilled in parallel with the shaft mounting hole 12c. A locking pin 36 is inserted into the locking pin holding hole 12d so as to be slidable in the retracting direction, and is pressed and biased in the pushing direction by a coil spring 37 housed in the locking pin holding hole 12d. ing.

The cone shaft 14 is formed of a thin shaft main body 14a and a cone mounting portion 14b having a larger diameter than the shaft main body 14a at its lower end, and the upper end of the shaft main body 14a is inserted into the shaft mounting hole 12c. A recessed groove 38 is provided on the outer circumference of the locking pin 36, and the tip of a holding pin 28 attached perpendicularly to the shaft body 14a is fitted therein, so that the rotating handle 12 and the cone shaft 14 are connected. are locked and fixed so that they can move vertically integrally with a predetermined vertical play. Although not shown, the locking pin 36 is provided with a detent so that it does not rotate in the engaging/disengaging hole 18f.

An inclined hole 14c inclined with respect to the cone shaft 14 is formed in the lower surface of the cone mounting portion 14b, and an eccentric shaft 16a of the eccentric cone 16 is inserted through a thrust bearing 30 and a needle bearing 32 so as to be eccentrically rotatable. It is The eccentric shaft 16a is fitted with a retaining C-shaped ring 34 for preventing the eccentric shaft 16a from falling out of the inclined hole 14c. As a result, the eccentric cone 16 rotates around the central axis of the cone shaft 14 . The tip of the conical eccentric cone 16 is aligned with the central axis of the cone shaft 14, and the generatrix of the eccentric cone 16 is aligned with the flared surface 41 of the pipe holding hole 40 of the gauge bar 22, which will be described later. ing.

The outer peripheral edge of the upper end of the cone mounting portion 14b forms an engagement edge 14d for preventing slippage, and is formed stepwise at the lower end of a feed screw hole 24a into which a female screw 24b of a yoke body 24 (to be described later) is screwed. engages the lower edge of the

The eccentric cone 16 is composed of an eccentric shaft 16a and a conical head 16b, and the conical head 16b is inclined and exposed from the lower surface of the cone mounting portion 14b.

The feed screw 18 has a disc-shaped flange portion 18a formed on its upper portion, and a trunk portion 18b that is thinner than the flange portion 18a is vertically provided from the lower surface of the flange portion 18a. A cylindrical portion 18g (with a diameter equal to or smaller than the root diameter of the male thread 18c) is provided at the insertion tip portion of the body portion 18b, and the cylindrical portion 18g and the flange portion 18a are separated from each other. A male screw 18c is engraved therebetween. Since the outer diameter of the cylindrical portion 18g is the same as or smaller than the root diameter of the male thread 18c, it is formed to be slightly smaller than the inner diameter of the thread of a female thread 24b formed on the yoke body 24, which will be described later. .

A slide hole 18d through which the shaft body 14a of the cone shaft 14 is rotatably and slidably inserted is formed from the flange portion 18a to the middle of the trunk portion 18b. A thick spring housing hole 18e is drilled toward the bottom surface.

The flange portion 18a is provided with an engaging hole 18f penetrating vertically, and the lower end of the locking pin 36 inserted into the locking pin holding hole 12d is fitted into the engaging hole 18f. I'm in.

The gauge bar 22 is made up of rod-shaped half members 22a and 22b that can be opened and closed, and a plurality of pipe holding holes 40 having different diameters are formed in the mating surfaces of the half members 22a and 22b in a closed state. Therefore, each pipe holding hole 40 is formed in a half-split shape. On the upper surface 22j side of the gauge bar 22, the opening edge of the pipe holding hole 40 is formed with a flared surface 41 that is largely chamfered to have a V-shaped cross section.

The yoke body 24 is formed of a gate-shaped lower portion (gauge support portion 24f) and a tubular portion 24g integrally provided on the upper surface thereof. A female screw 24b is bored in the inner peripheral surface of the feed screw hole 24a.

An intermediate hole portion 24d having an inner diameter larger than that of the feed screw hole 24a is formed from the lower edge of the feed screw hole 24a (this portion is a retaining stepped portion 24c that engages with the cone mounting portion 14b of the cone shaft 14). A lower hole portion 24e having an inner diameter larger than that of the intermediate hole portion 24d is formed from the lower edge of the intermediate hole portion 24d, and opens to a gauge support portion 24f provided at the lower portion of the yoke body 24. As shown in FIG.

Here, the inner diameter of the feed screw hole 24a is smaller than the outer diameter of the cone mounting portion 14b, and the inner diameter of the intermediate hole portion 24d is slightly larger than the outer diameter of the cone mounting portion 14b. is retracted toward the tubular portion 24g, the cone mounting portion 14b is accommodated in the intermediate hole portion 24d (see FIG. 3).
A needle bearing 25 is mounted in the lower hole portion 24e to support the rotation of the cone mounting portion 14b.

The lower edge of the feed screw hole 24a is formed in a stepped shape with respect to the intermediate hole portion 24d. It engages with the engaging edge 14d of the upper edge. At this time, the male thread 18c of the feed screw 18 is unscrewed from the female thread 24b of the feed screw hole 24a, and the unthreaded cylindrical portion 18g idles inside the female thread 24b.

The pressure spring 26 is housed in the spring housing hole 18e, and its upper end is in elastic contact with the ceiling of the spring housing hole 18e, and its lower end is in elastic contact with the cone mounting portion 14b via the thrust bearing 27. is pushed downward from the feed screw 18 .

The gauge support portion 24f of the yoke body 24 is a gate-shaped portion that penetrates through the front and rear walls of the lower portion of the yoke body 24 and has gauge bar sliding grooves 24h on the inner surfaces of both side walls thereof through which the gauge bar 22 is inserted. is. The gauge bar sliding groove 24 h is formed perpendicular to the central axis of the yoke body 24 . A tightening clamp 42 is provided on one wall surface of the gauge support portion 24f so as to align the gauge bar 22 with the center of rotation of the eccentric cone 16 and fix it.

The pipe end face restrictor 1 has various shapes as shown in FIGS. 5 to 7. FIG. Here, a first embodiment will be described (FIG. 5).
The pipe end face restrictor 1 shown in FIG. 5 is made of metal (for example, a ferromagnetic material such as iron) and is formed to have a U-shaped longitudinal section. The lower piece is a lower surface piece 4 that slides along the lower surface of the gauge bar 22 in the longitudinal direction. That is, the upper end of the side piece 3 is connected to one end of the pipe end regulating piece 2 , and the lower end of the side piece 3 is connected to one end of the lower surface piece 4 .
The distance between the tube end regulating piece 2 and the bottom piece 4 (the length of the side piece 3) is approximately the same as the vertical thickness of the gauge bar 22 so that it can slide along the gauge bar 22. - 特許庁

The length from the connecting end on the side piece 3 side of the pipe end regulating piece 2 to the tip thereof is set to a length or width sufficient to partially or entirely cover the pipe holding hole 40 of the gauge bar 22. The lower surface of the pipe end regulating piece 2, which is in sliding contact with the upper surface 22j of the gauge bar 22, is defined as a regulating surface 2a against which the pipe end T of the metal pipe P abuts. The tip of the pipe end regulating piece 2 positioned above the pipe holding hole 40 is formed in a V-shape whose width gradually decreases toward the tip, a square, a circle, or the like (not shown).
A recess 3a is formed in the inner surface of the side piece 3, and a magnet 5 is mounted in this recess 3a.

As shown in FIG. 4, the pipe end face restrictor 1 is fitted into the gauge bar 22 from the side surface, and is magnetically attracted to the side surface of the gauge bar 22 by the magnet 5. It will be covered from the top. In this case, the pipe end face restrictor 1 can be fitted from any side and used according to the site.

The magnet 5 fixed to the side piece 3 of the pipe end face restrictor 1 is magnetically attracted to the gauge bar 22 and the side piece 3 side is magnetized with different polarities, and is strongly magnetically attracted to the side surface of the gauge bar 22. .
Since the lower surface piece 4 of the magnetically attracted pipe end face restrictor 1 must keep the pipe holding hole 40 open to the lower surface of the gauge bar 22, its length is shorter than the pipe end restricting piece 2, and the pipe is held. It does not reach the hole 40 .

An example of the procedure for flaring the end portion of the metal pipe P using the flare forming tool A configured as described above will be described.
The gauge bar 22 is slidably inserted into the gauge bar sliding groove 24h of the yoke body 24 with the tightening clamp 42 loosened. The gauge bar 22 can be opened and closed at a large angle.

First, a pipe holding hole 40 having an inner diameter matching the metal pipe P to be flared is selected, and the yoke body 24 is moved to a position away from the pipe holding hole 40 . Subsequently, the pipe end face restrictor 1 is moved to the pipe holding hole 40 . The pipe end regulating piece 2 of the pipe end face regulating tool 1 that has moved closes the upper surface opening of the pipe holding hole 40 while being in contact with the upper surface 22 j of the gauge bar 22 .

Then, the end portion of the metal pipe P is inserted into the pipe holding hole 40 in which the pipe end face restrictor 1 is installed from the lower opening side, the end face T of the metal pipe P is abutted against the pipe end restricting piece 2, and the upper surface of the gauge bar 22 is pushed. 22j and the end face T of the metal pipe P are aligned. At this time, even if the end face T of the metal pipe P collides with the regulation surface 2a of the pipe end regulation piece 2 with a certain amount of force, the pipe end regulation member 1 is magnetically attracted to the gauge bar 22 by the magnet 5. In order to enable sliding movement, even if there is a slight gap between the gauge bar 22 and the pipe end face restrictor 1, the pipe end face restrictor 1 will not be displaced from the gauge bar 22 due to the strong magnetic attraction. More specifically, the strong magnetic attraction force prevents the regulation surface 2a from separating from the upper surface 22j of the gauge bar 22, so that the upper surface 22j of the gauge bar 22 and the end surface T of the metal pipe P can be aligned. After that, while holding the metal pipe P in that state, the pipe end face restrictor 1 is shifted to a position where it does not interfere with the yoke body 24 . Next, the yoke body 24 is moved to just above the pipe holding hole 40 holding the metal pipe P therebetween.

The tightening clamp 42 is then tightened to firmly secure the gauge bar 22 to the yoke body 24 . At this point, the center of the metal pipe P in the corresponding pipe holding hole 40 and the axis of the cone shaft 14 are aligned.

When the rotary handle 12 is rotated forward when the axes are aligned, the rotational force of the rotary handle 12 is transmitted to the cone shaft 14 , and the feed screw 18 spirals inside the yoke body 24 to rotate the eccentric cone 16 . It moves to the gauge bar 22 side, and the end T of the metal pipe P is spread along the flaring surface 41 by the eccentric cone 16 to be flared (FIG. 2).

When the rotary handle 12 is rotated forward after the flaring of the metal pipe P is completed, the eccentric cone 16 rotates while sliding on the flared portion of the metal pipe P, and the cone shaft 14 stops at that position. However, the feed screw 18 further spirals as the rotary handle 12 rotates forward. As a result, the engagement/disengagement hole 18f of the feed screw 18 moves in a direction to come out of the retaining pin 28 with respect to the retaining pin 36 which is retained at the retaining pin 28 and stopped at that position.

As shown in FIG. 2(b), when the retaining pin 28 is pulled out to the inclined surface 36a at the lower insertion end, the inclined surface 36a slides in contact with the opening edge of the engagement/disengagement hole 18f, and the holding pin 28 resists the coil spring 37. As a result, the rotary handle 12 is released from the engaging/disengaging hole 18f and rotates idle. As a result, the feed screw 18 stops spiraling, and the end of flaring can be known.

When flaring is completed, the rotary handle 12 is rotated counterclockwise. When the rotating handle 12 is rotated counterclockwise, as can be seen from FIG. 2(b), the elastic force of the coil spring 37 pushes the side surface 36b of the holding pin 28 opposite to the inclined surface 36a into the engagement/disengagement hole 18f. Then, the feed screw 18 is rotated counterclockwise and moved in the unthreading direction. As a result, the eccentric cone 16 is pulled up and separated from the flared portion of the metal pipe P.
Then, the tightening clamp 42 is loosened, the gauge bar 22 is opened, the half members 22a and 22b are widened, and the flared metal pipe P is extracted to complete the flaring.

Another example of the pipe end face restrictor 1 will be described. The pipe end face restrictor 1 of FIG. 5 has the magnet 5 installed on the side piece 3 as described above. may be set to If the tube end regulating piece 2 is provided with the magnet 5 , the tube end regulating piece 2 is magnetically attracted directly to the upper surface 22 j of the gauge bar 22 , and it is preferable to provide the magnet 5 on the side piece 3 . Moreover, although the magnet 5 is used in the above case, the pipe end face restrictor 1 itself may be constructed of a magnet plate (FIG. 6). In this case, the inner surface side and the outer surface side are magnetized with different polarities.

In FIG. 7, the pipe end face restrictor 1 is composed of a magnet plate, and the entire pipe end face restrictor 1 is magnetically attracted to the upper surface 22j and the side surface of the gauge bar 22. The lower surface piece 4 is omitted and the cross section is L-shaped. It is. As the simplest structure of the pipe end face restrictor 1, although not shown, the pipe end face restrictor 1 may be composed of a magnet plate, the side piece 3 may be eliminated, and only the pipe end restrictor piece 2 may be used.

A: flare forming tool, P: metal pipe, T: end face, 1: pipe end face regulator, 2: pipe end regulation piece, 2a: regulation surface, 3: side piece, 3a: recess, 4: bottom piece, 5: Magnet 12: Rotating handle 12a: Grip portion 12b: Driver hole 12c: Shaft mounting hole 12d: Locking pin holding hole 14: Cone shaft 14a: Shaft main body 14b: Cone mounting portion 14c: Incline hole 14d: engaging edge 16: eccentric cone 16a: eccentric shaft 16b: conical head 18: feed screw 18a: flange portion 18b: body portion 18c: male screw 18d: slide hole 18e: Spring storage hole 18f: Engagement/disengagement hole 18g: Cylindrical part 20: Mechanism part 22: Gauge bar 22a and 22b: Half member 22j: Top surface 24: Yoke body 24a: Feed screw hole 24b: Female Screw 24c: retaining stepped portion 24d: intermediate hole portion 24e: lower hole portion 24f: gauge support portion 24g: tubular portion 24h: gauge bar sliding groove 25: needle bearing 26: pressing spring 27: Thrust bearing, 28: Retaining pin, 30: Thrust bearing, 32: Needle bearing, 34: C-shaped ring, 36: Locking pin, 36a: Inclined surface, 36b: Side opposite to inclined surface, 37: Coil spring, 38: concave groove, 40: pipe holding hole, 41: flared surface, 42: tightening clamp

Claims (4)

A gauge bar is provided which penetrates from the lower surface to the upper surface and has a plurality of pipe holding holes for holding ends of metal pipes, the gauge bar is slidably held, and is held in one of the pipe holding holes of the gauge bar. A pipe end face restrictor used in a flare forming tool for flaring the end of a metal pipe with
The pipe end face restrictor has a size protruding into the pipe holding hole along the upper surface of the gauge bar, and the end face of the metal pipe inserted into the selected pipe holding hole from below abuts. A pipe end face restrictor comprising a pipe end restricting piece and a magnet or a magnet for magnetically attracting the gauge bar.
The pipe end face restrictor includes the pipe end restricting piece, a side piece arranged along one side surface of the gauge bar, and a lower surface piece arranged along the lower surface of the gauge bar. 2. The pipe end face regulation according to claim 1, wherein the upper end of the piece is connected to one end of the pipe end regulation piece, and the lower end of the side piece is connected to one end of the lower surface piece. equipment.
The pipe end face restrictor is composed of the pipe end restricting piece and a side piece arranged along one side surface of the gauge bar. 2. The pipe end face restrictor according to claim 1, wherein the pipe end face restrictor is connected.
A gauge bar penetrating from the lower surface to the upper surface and having a plurality of pipe holding holes for holding the ends of metal pipes; A yoke body holding a conical eccentric cone that is pressed against the flared surface of the holding hole to form a flare, and a yoke body that slides along the longitudinal direction of the gauge bar so that the end surface of the metal pipe is formed with the flared surface. and the pipe end face restrictor according to any one of claims 1 to 3, which is aligned with the upper surface of the gauge bar.

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