JPS6310173Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a flaring tool for forming a flare at the end of a pipe.

(Prior art) As a tool for forming a flare for attaching a connecting fitting to the edge of a pipe at various piping construction sites, etc., the tool presses a conical forming member against the edge of the pipe and rotates it with a handle. It is known that the end edge is widened into a conical shape, but this type of conventional flaring tool can only form a conical flare, and a large-scale specialized machine is not required to form a flat flare. I had a problem where I couldn't get it.

(Purpose of the invention) The present invention was completed with the aim of solving the above-mentioned problems and providing a small-sized flare tool that can easily form a flat flare on the edge of a pipe.

(Structure of the invention) The present invention includes a gate-shaped main body whose lower part is a pipe holding part, and a set screw with a handle rotatably provided at the center of the top of the main body. A nut that moves up and down while engaging with a key is screwed together, and the lower end of the set screw has a flange part that expands the edge of the pipe from the inside and a flare that presses the flange edge from the top surface. It is characterized in that a flare member provided with a portion is pivotally mounted.

(Embodiment) Next, the present invention will be described in detail with reference to the illustrated embodiment. 1 is a gate-shaped main body with a pipe holding section 2 at the lower part, and a handle 3 is attached to the outside of the main body 1. Further, the pipe holding portion 2 includes a fixed arm 4 that connects the lower end of the gate-shaped main body 1, and a swinging arm 6 that is pivotally connected to one end of the fixed arm 4 with a pin 5 so as to be openable and closable. It is provided. The fixed arm 4 and the swinging arm 6 have arcuate cutouts 7, 7' that hold the pipe 50 inside.
A butterfly bolt 9 is attached to the other end of the swinging arm 6 as a tightening member for tightening the tip of the swinging arm 6 toward the fixed arm 4, and the pipe 50 is connected to these notches. When the pipe 50 is inserted into the pipes 7 and 7' and the butterfly bolt 9 is tightened, the pipe 50 is firmly held by the pipe holding portion 2 in the lower part of the main body 1. Further, a set screw 11 having a handle 10 at the upper end is rotatably provided at the center of the top of the main body 1. Further, an annular groove 12 is formed in the upper part of the set screw 11, and a pin 13 that fits into the groove 12 is protruded from the main body 1, so that the set screw 11 can freely rotate. It does not move vertically. A nut 15 is screwed into a threaded portion 14 formed in the lower half of the set screw 11, and the nut 15 is fitted with a rotation preventing nut 15 formed only in the upper half of the inside of the gate-shaped main body 1. When the set screw 11 is rotated, the nut 15 moves up and down inside the main body 1, but when it descends to a certain position, the nut 15 engages with a key 16 for preventing rotation.
Since the engagement with the set screw 6 is disengaged, the screw does not descend any further, and simply rotates idly together with the set screw 11 on the spot. A spring pin 18 that elastically engages with the key groove 17 of the nut 15 is provided below the rotation prevention key 16 inside the main body 1. Furthermore, a horizontal pin 19 is provided at the lower end of the set screw 11.
A flare member 20 is pivotally mounted with the upper protrusion 21 of the flare member 20 connected to the nut 15.
As the nut 15 moves up and down under pressure from the lower surface of the nut 15, it tilts up and down about the horizontal pin 19. As shown in FIG. 6, the lower surface of the flare member 20 has an arc-shaped arc that is inserted into the end edge of the pipe 50 in an inclined state and expands the end edge from the inside when the flare member 20 is gradually tilted horizontally. A flange portion 23 and linear flare portions 24 that further press the flanged edge from the upper surface to make it planar are provided on both left and right sides with the horizontal pin 19 in between. Note that 22 is a nut 1 for returning the flare member 20 from a horizontal state to an inclined state.
The upper protrusion 2 of the flare member 20 is embedded in the upper protrusion 2 of the flare member 20.
It is a spring pin that presses 5.

With this structure, the pipe 50 is held in the pipe holding portion 2 at the lower part of the portal-shaped main body 1, and the handle 10 is provided at the center of the top of the main body 1.
If you rotate the set screw 11 with
The nut 15, which is screwed into the main body 1 and moves up and down inside the main body 1 as the set screw 11 rotates while engaging with a rotation prevention key 16 inside the main body 1, gradually moves downward.
The flare member 20 pivotally attached to the lower end of the set screw 11 by its lower surface is gradually tilted from an inclined state toward a horizontal state. Further, at the same time, the flare member 20 rotates in a horizontal plane together with the set screw 11, so the flange portion 23 provided on the lower surface of the flare member 20 rotates along the circumferential surface of the pipe 50 and rotates its edge. As shown on the right side of FIG. 6, the nut 15 is gradually expanded and flanged, and when the nut 15 is lowered, the flared portion 24 of the flare member 20 extends the edge of the flanged pipe 50 as shown on the left side of FIG. Press from above to form a flat shape. Note that if the rotation prevention key 16 is formed only in the upper half of the inner side of the main body 1 as described above, the nut 1 will be turned off when the flare member 20 is tilted to the horizontal position.
5 is disengaged from the rotation prevention key 16, and the nut 15 idles to the same position and stops descending, so the flare member 20 rotates at the same position and locks the pipe 5.
The edges of the 0 can be flared into a completely flat shape. When flare forming is completed in this way, loosen the butterfly bolt 9 to open the swing arm 6, take out the pipe 50, and then remove the handle 10 and set screw 11.
Rotate in the opposite direction. Nut 1 when flare molding is completed
5 is removed from the rotation prevention key 16, so
The nut 15 also rotates in the opposite direction along with the set screw 11.
By the time the nut 15 rotates 360 degrees, the aforementioned spring pin 18 elastically fits into the key groove 17 of the nut 15 to prevent it from idling, so if the set screw 11 is further reversed, the nut 15 will gradually rise. The state shown in FIG. 1 is restored. At this time, the flare member 20 connects the upper protrusion 25 with the spring pin 2.
2, it returns to the tilted position again. In the above embodiment, the flare member 20 is an integrally molded product, but as shown in FIG.
A more beautiful flare may be formed by having the rollers 26 press the edge of the flare member 20. Also, by changing the shape of the flare member 20, not only a planar flare but also a conical flare can be formed. Can be molded.

(Effects of the invention) As is clear from the above explanation, the present invention is a device that can easily form a flat flare on the edge of a pipe using a small tool. As a flaring tool that solves this problem, it has great practical value.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the present invention, Fig. 2 is a partially cutaway side view, Fig. 3 is a partially cutaway top view, and Fig. 4 is a partially cutaway bottom view. FIG. 5 is a partially cutaway perspective view showing another embodiment of the flare member, and FIG. 6 is a partially cutaway front view of the main part illustrating the flare forming process. 1: Main body, 2: Pipe holding part, 10: Handle, 11: Press screw, 15: Nut, 16: Rotation prevention key, 20: Flare member, 23: Flange part, 24: Flare part, 50: Pipe .

Claims (1)

[Scope of utility model registration request] A set screw 11 with a handle 10 is rotatably provided at the center of the top of a gate-shaped main body 1 whose lower part is a pipe holding section 2. A nut 15 that moves up and down while engaging with a key 16 is screwed together, and furthermore, a flange part 23 is provided at the lower end of the set screw 11 to expand the edge of the pipe from the inside, and a flange part 23 is provided to press the flanged edge from the top surface. A flare tool characterized in that a flare member 20 provided with a flare portion 24 is pivotally mounted.