TWM483130U - Flaring tool - Google Patents

Description

Flaring tool

The present invention relates to a flaring tool for forming a flare at the connecting end of a tubular member.

In the prior art, when performing piping work of a cold and warm room, etc., a tool for forming a flaring for mounting a metal connecting member at a connecting end portion of a pipe member is generally used: a counter-conical cone is used to hold the jig. A flaring tool that performs pressing in the end of the tube and flaring the tube by rotating the handle.

When the flaring tool is used for the flaring process, first, the jig is opened to the left and right and the end of the pipe member is inserted into the hole of the jig corresponding to the size of the pipe to be processed, and the end position of the pipe member is aligned with the upper position of the jig. This will close the clamp. Next, the yoke body of the flaring tool is moved over the hole in which the pipe member is held, and the yoke body is rotated to fix the yoke body to the jig. Further, by rotating the handle, the cone can be lowered to press the cone toward the end of the tube, and the end portion can be widened to form a flare at the tip end of the tube.

Since the flaring tool is generally made of steel, the heavier work results in poor workability, so when the end position of the pipe is aligned with the upper position of the clamp, or when the clamp is closed after alignment, there will be the end of the pipe. The position is offset from the upper position of the clamp. In a state where the end position of the pipe member is offset from the upper position of the jig, when the pipe member is held by the jig, there is a case where the finished product of the flared shape of the pipe member is defective or the pipe member is broken. Therefore, there is a waste of time and material costs due to reworking.

The present invention is to solve the problems of the above-mentioned flaring tool, and an object thereof is to provide a flaring tool capable of reliably performing flaring processing.

The present invention has been made by the inventors for solving the above problems, and the gist of the novel disclosure is as follows.

(1) A flaring tool comprising: a jig having a plurality of holding holes for holding the end of the pipe; and a yoke body for opposing the jig along a length direction of the jig formed with the plurality of the holding holes a sliding; a conical cone held by the yoke body for pressing the end of the pipe to form a flare, wherein the jig includes: a guiding groove, and a flared side is formed on the pipe to be held a bottom surface on the opposite side is formed along the aforementioned length direction; and a tube end restraint is shaped as follows: An outer edge of the jig that is guided by the guiding groove and slid in the longitudinal direction, and has a pipe position restricting portion having a front end position for aligning a front end of the pipe end portion with an upper surface of the jig forming flared side a restricting surface; the protruding portion is engaged with the guiding groove; the extending portion extends from the bottom surface along the bottom surface of the clamp toward the holding hole side; the side portion is configured to connect the tube position restricting portion side and the protruding portion side.

(2) In the above configuration (1), the yoke portion has a protruding portion that engages with the guiding groove, and is guided by the guiding groove to slide.

(3) In the above configuration (1) or (2), the pipe end restraint has a first corner portion having a shape along a corner formed by the side surface of the jig and the upper surface And the second corner portion has a shape that is a corner portion formed along the side surface of the jig and the bottom surface.

(4) characterized in that, in any of the configurations disclosed in the above (1) to (3), the extension portion of the tube end restraint extends to not maintain the largest diameter among the plurality of the holding holes. The position where the holes overlap.

According to the present invention, it is possible to provide a flaring tool that can perform flaring processing correctly.

1‧‧‧ Flaring Tools

2‧‧‧ yoke body

4‧‧‧Axis

5‧‧‧Feed handle

6‧‧‧Clamping Department

8‧‧‧Clamp

10‧‧‧ cone

11‧‧‧ Pipe end restraints

12‧‧‧ Guide pin

14‧‧‧ Ball plug

Figure 1 is an external view of the flaring tool.

Figure 2 is a cross-sectional view of the flaring tool.

Figure 3 is an external view of the flaring tool.

Figure 4 is a top view of the fixture with the end closure of the tube.

Fig. 5 is a bottom view of the jig shown in Fig. 4.

Fig. 6 is a cross-sectional view showing the A-A' of the jig shown in Fig. 4.

Fig. 7 is a modification of the jig.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Fig. 1 is an external view of the flaring tool 1 of the present embodiment. Fig. 2 is a cross-sectional view of the flaring tool 1. Fig. 3 is an external view of the flaring tool 1 as viewed from the front side shown in Fig. 1. Fig. 4 is a top view of the jig 8. Fig. 5 is a bottom view of the jig 8 shown in Fig. 4. Fig. 6 is a cross-sectional view showing the A-A' of the jig shown in Fig. 4.

The flaring tool 1 is a tool for forming a flaring for attaching a metal connector at a connection end portion of a pipe member, for example, when performing piping work for a cold and warm room.

The flaring tool 1 of the present embodiment includes a yoke body 2, a shaft portion 4, a feed handle 5, a clamp portion 6, a jig 8, a cone 10, and a pipe end restraint 11 and the like.

The yoke body 2 includes a cone 10 that moves in the axial direction of the handle by rotating the feed handle 5 therein. Further, the yoke body 2 has a first holding portion 21 and a second holding portion 22. The first holding portion 21 and the second holding portion 22 hold the jig 8 so as to be able to be in the cone 10 Slide underneath.

The second holding portion 22 is formed with a guide pin 12 that engages with the guide groove 8c formed in the jig 8 described below, and serves to slide the yoke body 2 along the jig 8. In the third embodiment, the guide pin 12 disclosed in the present embodiment is disposed such that the second holding portion 22 and the jig 8 face upward. Moreover, the third figure is shown in a state in which the pipe end restraint 11 is removed, so that the structure of the guide pin 12 can be clearly seen. The two guide pins 12 are arranged along the sliding direction of the yoke body 2 as indicated by a broken line in FIG. 2 . Since the two guide pins 12 are guided by the guide grooves 8c formed along the longitudinal direction of the jig 8 described below, the yoke body 2 can be stably positioned along the longitudinal direction of the jig 8 (a plurality of holdings are arranged) The direction of the hole 8b is slid.

The second holding portion 22 is formed with a ball plug portion 14 as a pressing portion as shown in Fig. 3 . Further, in the third drawing, the portion of the ball plug portion 14 surrounded by the one-dot chain line is shown in a cross-sectional structure, so that the structure of the ball plug portion 14 can be clearly seen. The ball plug portion 14 is a positioning member for aligning the yoke body 2 with each of the holding holes 8b when the yoke body 2 is moved relative to the jig 8. The ball joint portion 14 is composed of a steel ball 14a, a compression spring 14b, a casing 14c, and the like. The steel ball 14a is pushed by the compression spring 14b so that the steel ball 14a is pressed against the jig 8. The steel ball 14a is pressed by the ring 14d so as not to be ejected from the outer casing 14c. As described below, on the side of the ball plug portion 14 of the jig 8, a recess 8d is formed at each of the positions of the holding holes 8b formed in the jig 8. When the yoke body 2 is slid to the jig 8, due to the steel ball being pushed Since the 14a is fitted into each of the recesses 8d, the yoke body 2 can be easily positioned at the position of each of the holding holes 8b.

The first holding portion 21 of the yoke body 2 is formed to have a gap with the side surface of the jig 8 on the side of the clamp portion 6. By this gap, one side (the movable side operating lever 82) of the jig 8 can be opened to the other side (the fixed side operating lever 81) as follows. Further, even if there is a gap between the first holding portion 21 and the jig 8, the guide pin 12 is guided by the guide groove 8c, so that the yoke body 2 can stably slide the jig 8 without rattling.

The shaft portion 4 is formed with a screw thread around the yoke body 2 to be screwed. The feed handle 5 is disposed on one end side (upper portion of FIG. 1 or FIG. 2) of the shaft portion 4, and the cone 10 is disposed on the other end side (lower portion of FIG. 2) of the shaft portion 4. By rotating the feed handle 5, the shaft portion 4 is screwed forward to the yoke body 2, and the cone 10 can be pressed against the clamp 8 or lifted upward by changing the direction of rotation.

The feed handle 5, as described above, is a handle for moving the cone 10. The shape of the feed handle 5 is not particularly limited as long as it can be rotated. Further, a hole for connecting a rotary tool for inserting a drill such as a four-corner or a hexagon may be formed at a position of a rotation axis of the feed handle 5, so that the feed handle 5 can be rotated by a tool such as an electric drill.

The cone 10 formed below the shaft portion 4 is configured to widen and expand the tubular end portion held by the jig 8 to form a flared member. The cone 10 has a conical shape. The cone 10 is as shown in Fig. 2, and the front end position of the cone 10 is kept at any time. The position of the center of rotation of the shaft portion 4 is formed to be inclined toward the axial direction, that is, a so-called eccentric cone. When the feed handle 5 is rotated, since the cone 10 is eccentrically rotated to widen the pipe member, it is possible to form a flare having less variation. In the second drawing, the cone 10 is lowered to the jig 8 , but when the jig 8 is slid, the rotation of the feeding handle 5 is performed to retract the cone 10 upward.

Further, as shown in the cross-sectional view of Fig. 2, the shaft portion 4 may include a clutch mechanism formed by an internal spring or the like. The clutch mechanism rotates the feed handle 5 to form a flare, and when the torque for rotating the feed handle 5 has reached a predetermined torque, the feed handle 5 is idling without causing the cone The body 10 is moved toward the tube side. Thereby, it is possible to prevent the cone 10 from being excessively pressed against the pipe member to form an abnormal flare.

The clamp portion 6 is a member for fixing the yoke body 2 to the jig 8. The clamp portion 6 is constituted by a clamp handle 6a, a shaft portion 6b that is rotated by the clamp handle 6a, and the like. The shaft portion 6b is screwed to the yoke body 2 . When the clamp handle 6a is rotated, the shaft portion 6b advances the yoke body 2 so that the front end portion 6c of the shaft portion 6b abuts against the jig 8. By rotating the clamp handle 6a, the tip end portion 6c is pressed firmly by the jig 8, and the jig 8 is closed, whereby the pipe member can be surely held by the holding hole 8b, and the yoke body 2 can be fixed to the jig 8. Further, as described below, a groove portion 8e is formed on the side of the clamp 8 on the side of the clamp portion 6 at a position of the clamp 8 for holding the holding hole 8b of the pipe member. The front end portion 6c is formed to conform to the shape of the groove portion 8e (in the present embodiment, it is a truncated cone The shape is fixed by fitting the tip end portion 6c to the groove portion 8e by rotating the grip handle 6a, and the position of the yoke portion body 2 can be positioned at the position of the holding hole 8b of the jig 8 to be fixed.

The jig 8 is used to hold the front end portion of the pipe to be flared. As shown in Fig. 4, the jig 8 is formed with a plurality of holding holes 8b so as to be able to hold pipes having specifications of various diameters. The jig 8 is opened by the ring 8a as an axis and divided into two parts. The jig 8 of the present embodiment is composed of a fixed side operating lever 81 as a first operating lever and a movable side operating lever 82 as a second operating lever, and the movable side operating lever 82 can have a ring 8a as a rotating shaft. The yoke body 2 is opened. A flare forming surface 8g is formed above each of the holding holes 8b. The flared forming surface 8g is formed to form a predetermined flared inclined surface at the end of the tubular member. Specifically, as shown in Fig. 2, first, the end portion of the pipe is widened by rotating the cone 10 while rotating it. Next, until the end of the pipe member comes into contact with the flare forming surface 8g formed above the holding hole 8b of the jig 8, the conical body 10 is widened to form a flare of a predetermined shape. In the present specification, the upper surface refers to the opening portion having the holding hole 8b of the jig 8 and has the flared forming surface 8g side and the end portion side of the tubular member in the holding state. Further, the bottom surface refers to a surface on the opposite side to the opening portion having the holding hole 8b and on which the flare forming surface 8g is formed. The side surface refers to a side surface on both sides of the upper and lower surfaces and is formed with a concave portion 8d or a groove portion 8e.

The fixed side operating lever 81 is formed with a guide groove 8c and a plurality of recesses 8d. The guide groove 8c and the second holding portion 22 of the yoke body 2 are engaged with each other at the front and rear guide pins 12, and are used for guiding The yoke body 2 is relatively slid along the longitudinal direction of the jig 8. Further, on the fixed side operating lever 81, the pipe end restraint 11 is fixed so as to be slidable along the longitudinal direction of the jig 8, and the projecting portion 71 of the pipe end restricting member 11 is engaged with the guide groove 8c.

A plurality of recesses 8d are formed by fitting the steel balls 14a of the ball plug portion 14 to assist the positioning of the yoke body 2. When the flaring tool 1 is flared in the tubular member, the position of the center of rotation of the cone 10 (the axis of the shaft portion 4) in the yoke body 2 must be correctly aligned with the holding hole 8b holding the tubular member. Therefore, when the center of rotation of the cone 10 is located at the center of the holding hole 8b, the position of the ball portion 14 and the recess 8d is set so that the steel ball 14a can be fitted into the recess 8d. In the present embodiment, the recessed portions 8d are formed at the center positions of the respective holding holes 8b on the side surfaces of the fixed side operating lever 81, respectively. Therefore, the steel ball 14a of the ball joint portion 14 may be disposed on the extension line of the second holding portion 22 of the yoke body 2 in a direction orthogonal to the sliding direction of the rotation center position of the cone 10.

The movable side operating lever 82 forms a plurality of groove portions 8e for fitting the front end portion 6c of the clamp portion 6. In the present embodiment, since the distal end portion 6c has a truncated cone shape, the groove portion 8e also has a truncated cone shape. Each of the groove portions 8e is also formed at the center position of each of the holding holes 8b on the side surface of the movable side operating lever 82, similarly to the recessed portion 8d. Further, in the present embodiment, since the yoke body 2 is positioned at the position of each of the holding holes 8d by the ball plug portion 14 and each of the recess portions 8d, the groove portion 8e may not be provided on the movable side operating lever 82 side.

The pipe end restraint 11 is attached to the pipe to be flared When the position of the front end of the end of the piece is aligned with the upper position of the clamp 8, the contact surface of the end piece restricting member 11 is brought into contact with the end of the tube to restrict the end of the tube from being ejected to be the same as the upper surface of the jig 8. The position of the face is further above, thereby the member for positioning the end of the pipe. The pipe end restricting member 11 is composed of a plate member and is formed with a body portion 70 and a protruding portion 71. The main body portion 70, as shown in Fig. 6, is formed along the outer edge of the jig 8, and is composed of: a tube position restricting portion 70c along the upper surface of the jig 8, and a first corner portion 70a along the jig a corner portion 8f formed on the upper surface and the side surface of the portion 8 (a portion surrounded by a dotted line in Fig. 6); a side surface portion 70d along the side surface of the jig 8; and a second corner portion 70b along the bottom surface of the jig 8 A corner portion 8f formed on the side surface (a portion surrounded by a dotted line in Fig. 6); and an extending portion 70e extending along the bottom surface of the jig 8 and from the position of the protruding portion 71 toward the holding hole 8b side. Since the jig 8 is formed in a substantially rectangular parallelepiped shape, the pipe position restricting portion 70c and the extending portion 70e are formed to be parallel to each other, and the side surface portion 70d is formed in a direction perpendicular to the extending portion 70e with respect to the pipe position restricting portion 70c. Further, the tube position restricting portion 70c has a restriction surface that protrudes toward the holding hole 8b side and is used to restrict the end portion of the tube at a viewing angle of the fourth drawing of the jig 8, so that at least a portion overlaps with the holding hole 8b. The position of the end of the tube is correctly aligned with the upper position of the clamp 8. On the other hand, the extending portion 70e extends to the bottom surface of the jig 8 so as not to overlap the holding hole 8b so as not to interfere with the pipe to be held. In the present embodiment, as shown in Fig. 5, the extending portion 70e extends in a direction straight ahead in the longitudinal direction of the jig 8, so as not to overlap the holding hole 8b having the largest diameter of the end portion having the opening at the outermost side. The location. The protruding portion 71 is formed in a substantially rectangular parallelepiped shape elongated in the longitudinal direction of the jig 8, and is engaged with the guiding groove 8c. With this configuration, the pipe end restraint 11 can position the pipe end portion at the same position as the upper surface of the jig 8.

Further, the main body portion 70 is in close contact with the outer edge of the jig 8 as shown in Fig. 6. Specifically, in the present embodiment, the corner portion 8f formed on the upper surface and the side surface of the jig 8 and the corner portion 8f formed on the bottom surface and the side surface are rounded by chamfering, but the end portion of the tube end restricting member 11 Both the first corner portion 70a and the second corner portion 70b are also formed into a shape that is smoothly rounded along the corner portion 8f and bent at a right angle. The upper surface, the side surface, and the bottom surface of the jig 8 are in close contact with the tube position regulating portion 70c, the side surface portion 70d, and the extending portion 70e, respectively. Further, the end portion of the extending portion 70e may be located between the holding hole 8b and the guiding groove 8c. In order to prevent the pipe end restraint 11 from rattling, it is preferable to extend to a position where it does not overlap the holding hole 8b of the largest diameter.

The protruding portion 71 is also in close contact with the guide groove 8c as shown in Fig. 6. Specifically, in the present embodiment, the guide groove 8c is formed on the A-A' cross section in the short-side direction of the jig 8 (the horizontal direction of FIG. 6) in the direction in which the end portion of the pipe member is inserted. An elongated substantially rectangular parallelepiped, and the protruding portion 71 is formed in a substantially rectangular parallelepiped shape which is elongated in the short side direction of the jig 8 in a direction in which the end portion of the tubular member is inserted, in the A-A' cross section, and the protruding portion 71 is The respective faces in the guiding groove 8c are in close contact with each other. Further, the guide groove 8c is formed along the longitudinal direction of the jig 8, and the width of the protruding portion 71 is also formed along the guide groove 8c and the length direction is formed to be the length of the jig 8. The directions are the same, and the guide grooves 8c can be bitten to each other without a gap.

The end portion of the extending portion 70e is formed in a range between the holding hole 8b and the guiding groove 8c, and the protruding portion 71 is brought into close contact with the guiding groove 8c, and when the end portion of the pipe member is restricted to be positioned, the pipe member can be prevented The end restraint 11 will sway in the direction of insertion of the tube. Further, when the main body portion 70 is in close contact with the jig 8 and the protruding portion 71 is in close contact with the guide groove 8c, when the end portion of the pipe member is restricted, a gap can be prevented between the pipe end portion restricting member 11 and the jig 8. That is, since the structure can prevent the end portion of the tube member from being swayed when the end portion of the tube member is restrained, the front end position of the end portion of the tube member can be closely aligned with the upper surface of the jig 8 to enable The pipe is kept.

The above is the structure of the flaring tool 1 of the present embodiment. Next, an operation when the flaring tool 1 is formed into a flaring will be described.

First, as shown in Fig. 1, the jig 8 is opened by bringing the yoke body 2 closer to the side of the ring 8a, and the pipe end restraint 11 is slid toward the holding hole 8b which conforms to the diameter of the pipe to be processed. The tube member is inserted into the holding hole 8b from the end portion, and the tube member end portion is inserted until it contacts the tube position restricting portion 70c, and the jig 8 is closed. Since the pipe end restraint 11 is in close contact with the jig 8, the pipe can be held while the front end position of the pipe end is closely aligned in the same position as the upper surface of the jig 8. Further, in the present embodiment, the jig 8 fixes the fixed side operating lever 81 by the guide groove 8c and the two guide pins 12, so that the movable side operating lever 82 can be used to switch the fixed side operating lever 81. .

Next, the tube end restricting member 11 is moved and the yoke portion 2 is moved to a position where the holding hole 8b of the tube member is held. For example, as shown in Fig. 2, in the case where the tube member is held in the plurality of holding holes 8b and the third holding hole 8b is the largest number of holes, the tube end restraint 11 is directed toward the yoke body 2 moves in the opposite direction and moves the yoke body 2 to the position of the holding hole 8b. According to the ball plug portion 14 and the recess portion 8d of the present embodiment, when the yoke portion 2 is moved to the vicinity of the holding hole 8b, the projected steel ball 14a is fitted into the concave portion 8d, so that the yoke portion can be easily and accurately The center of rotation of the shaft portion 4 of the body 2 (the position of the front end portion of the cone 10) is aligned with the center position of the holding hole 8b. Further, the yoke body 2 can be slidably held by the yoke body 2 by the guide groove 8c and the guide pin 12. Further, when the yoke body 2 is slid, the pipe end restraint 11 is pressed by the yoke body 2 to slide, so that the pipe end restraint 11 can be slid by sliding the yoke body 2 .

Next, the clamp handle 6a is rotated to press the front end portion 6c of the clamp portion 6 into the corresponding groove portion 8e to hold the pipe member, and the yoke portion body 2 is firmly fixed to the jig 8.

Thereafter, the feed handle 5 is rotated to press the cone 10 against the tube held by the holding hole 8b, and a flare is formed while rotating the cone 10. In the case where the above-described clutch mechanism is provided, the flare is also completed as the time when the dynamic clutch mechanism does not transmit the torque to the cone 10. Thereafter, the feed handle 5 and the grip handle 6a are rotated in the opposite directions by the reverse steps, and the yoke body 2 is brought closer to the side of the ring 8a to open the jig 8, and the tube is removed from the holding hole 8b. Forming a flared job.

According to the reaping tool of the present embodiment described above, since the tube end restraint 11 is used, when the tube member is held by the jig 8, the front end position of the tube end portion can be correctly positioned to be the same as the upper surface of the jig 8. With the position, it is possible to reliably form the flare of the predetermined shape without causing breakage of the end of the pipe.

Therefore, according to the present embodiment, it is possible to provide the flaring tool 1 capable of performing the flaring processing with high accuracy and accuracy.

Further, in the present embodiment, the end portion of the pipe position regulating portion 70c is formed in a mountain shape on the upper surface of the jig 8, but the invention is not limited thereto. In other words, at least a part of the tube position regulating portion 70c may extend to a position overlapping the holding hole 8b in the plane view angle of Fig. 4, and may be formed in any shape. As long as at least a part of the pipe position regulating portion 70c extends above the holding hole 8b, the front end position of the pipe end portion can be closely aligned at the same position as the upper surface of the jig 8.

Further, in the present embodiment, the main body portion 70 and the protruding portion 71 are formed to have a width in the longitudinal direction of the jig 8, but the invention is not limited thereto. The width of the main body portion 70 and the protruding portion 71 in the longitudinal direction may be reduced, or as shown in Fig. 7, the width of the main body portion 70 and the protruding portion 71 in the longitudinal direction may be further widened. Although the width is not particularly limited, the width can prevent the tube end restraint 11 from swaying in the longitudinal direction, and since the contact area with the end of the tube can be made larger, the end of the tube can be more accurately The front end position is aligned at the same position as the upper surface of the jig 8 without sloshing.

Further, the yoke body 2 has a second holding portion 22 The guide pin 12 is provided, but is not limited thereto. That is, the yoke body 2 may not be provided with the guide pin 12. Even in this case, the tip end position of the pipe end portion can be aligned correctly and without being swayed at the same position as the upper surface of the jig 8.

Further, the yoke body 2 includes the ball plug portion 14 in the second holding portion 22, but is not limited thereto. That is, the yoke body 2 may not be provided with a ball plug portion. Even in this case, the tip end position of the pipe end portion can be aligned correctly and without being swayed at the same position as the upper surface of the jig 8.

The present invention has been described in detail with reference to the specific embodiments thereof, and various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the invention.

1‧‧‧ Flaring Tools

2‧‧‧ yoke body

4‧‧‧Axis

5‧‧‧Feed handle

6‧‧‧Clamping Department

6a‧‧‧Clamping handle

8‧‧‧Clamp

11‧‧‧ Pipe end restraints

Claims (5)

A flaring tool comprising: a clamp having a plurality of retaining holes for retaining an end of the tubular member; and a yoke body sliding relative to the clamp along a longitudinal direction of the jig formed with the plurality of retaining holes; The conical cone is held by the yoke body for pressing the end of the tube to form a flare, and the jig includes: a guiding groove formed on the flared side of the tube to be held a bottom surface of the opposite side is formed along the longitudinal direction; and a pipe end restraint is formed in the outer edge of the jig that is guided toward the longitudinal direction by the guiding groove, and has a pipe position The restricting portion has a regulating surface for aligning the front end position of the end portion of the pipe to the upper surface of the jig forming the flared side; the protruding portion is engaged with the guiding groove; and the extending portion is along the jig from the protruding portion The bottom surface extends toward the holding hole side; the side surface portion is for connecting the tube position regulating portion side and the protruding portion side. The flaring tool according to claim 1, wherein the yoke body has a protruding portion that engages with the guiding groove, and is guided by the guiding groove to slide. The flaring tool of claim 1 or 2, wherein the pipe end restraint has a first corner portion shaped to be a corner formed along a side surface of the jig and the upper surface; And the second corner portion has a shape that is a corner portion formed along the side surface of the jig and the bottom surface. The flaring tool of claim 1 or 2, wherein the extension of the tubular end restraint extends to a position that does not overlap with a retaining hole having the largest diameter among the plurality of retaining holes. . The flaring tool of claim 3, wherein the extension of the tubular end restraint extends to a position that does not overlap the plurality of retaining holes of the plurality of retaining holes.