JPS6045986B2 - cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for cutting pipes using a gas burner.

To connect a branch pipe to a pipe, first, it is necessary to open a hole with the same diameter as the branch pipe on the circumference of the pipe, and then cut off the end face of the branch pipe so that it fits closely to the surface of the pipe. become.

Conventionally, the above process involves marking a cutting line on the pipe and then manually holding a gas burner to cut it, which is time-consuming and results in a poor finish on the cut surface.
There was a problem that required post-processing using a hand grinder.

The present invention aims to eliminate the above-mentioned problems by eliminating the need for scribing and by improving the finish of the cut surface.

This invention provides a horizontal rotating shaft that is rotated at low speed by a motor on a slider that can move forward and backward, and a first shaft that protrudes forward in parallel with the rotating shaft via a connecting member that intersects with the tip of the rotating shaft. An arm is provided, and a second arm is provided that intersects the tip of the rotating shaft at right angles, and the slider is further provided with a rotating shaft parallel to the rotating shaft, so that the rotating shaft rotates twice per one rotation of the rotating shaft. Gears provided on the rotary shaft and the rotation shaft are engaged with each other so as to rotate, and a feeding inclined plate is provided at the rear of the slider and can be tilted from vertical to a predetermined angle of inclination. The rotor of the rotating arm that rotates with the rotating shaft is brought into contact with the plate surface, and when a through hole is provided in the pipe, a gas melting port is provided in the second arm.
To provide a cutting device that works by setting a gas cutting nozzle in a first arm when cutting off the end edge of a branch pipe.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the figure, 1 is a table, and this table 1
At the top, a slider 2 is provided which is movable forward and backward, and which always applies a backward force. The slider 2 is guided by the rail 3 on the table 1 and the dovetail groove of the slider 2, and is pulled back by engaging the end of the slider 2 with the protrusion 4 on the table 1. However,
A force for retracting may be applied using a push spring, a piston, or the like.

Also, on the slider 2, there is a horizontal rotating shaft 6 that rotates at a low speed.
is provided.

The rotating shaft 6 is supported by a bearing 7 on the slider 2, and a gear 9 of a motor 8 installed on the bearing 7.
The rotor 6 is meshed with a gear 10 provided at the end thereof to rotate at a low speed.

Furthermore, a rotation shaft 11 is provided on the slider 2, which is supported parallel to the rotation shaft 6 and rotates twice for each rotation of the rotation shaft 6.

The transmission from the rotating shaft 6 to the rotating shaft 11 is carried out by a gear 10,
This is done by meshing with a gear 12 provided on a rotating shaft 11. Also, the rear table 1 of the slider 2
A feeding inclined plate 13 is provided on the top, and the feeding inclined plate 13 is capable of tilting the plate surface from vertical to a predetermined angle of inclination.

In the illustrated case, the above-mentioned inclined plate 13 is placed on the table 1 with the leg material 1
4 is erected, and the end of the horizontal vibrator 15 is fixed to this leg member 14. At the same time, an annular tilting plate 13 is fitted on the outside of the tip of the horizontal vibrator 15, and the inner circumference of the tilting plate 13 is attached to the horizontal vibrator 15. The pins 16 protruding from both side edges are pivotally supported, and the tilting plate 1
3 and a worm gear 19 with a handle 18 that is pivotally supported on the horizontal vibrator 15.
The tilting plate 13 is rotated at a predetermined angle through the worm gear 19 and the worm wheel 17.

Furthermore, a rotor 21 is fixed to the tip of an L-shaped pivot arm 20 at the end of the pivot shaft 11 and is brought into contact with the surface of the tilting plate 13 at the end of the pivot arm 20 .

Also, there is a connection that intersects the tip of the rotating shaft 6 at right angles. Part 2
2, and the connecting member 22 is also provided with a detachable first arm 23 that projects forward in parallel to the rotating shaft 6.

Further, a second arm 24 is provided at the tip of the rotating shaft 6 and intersects the rotating shaft 6 at a right angle.

To attach the gas melting nozzle A to the first arm 23, as shown in FIG. A slidable rod member 26 is inserted and the end of the rod member 26 is connected to the connecting plate 27 via a pin 28, and the end of the tension spring 29 is engaged with the connecting plate 27 and the first arm 23. A rotor 30 that contacts the outer periphery of the branch vibe B is provided at the tips of the two rods 26 at the center and on one side, and a plate-like body 31 is connected to the tip of the remaining rod 26. An arcuate groove 32 is provided between both ends of one side of the body 31, a protrusion 34 protruding from the outer periphery of the holding band 33 of the crater A is fitted into the arcuate groove 32, and a long hole is provided between both ends of the bottom surface of the arcuate groove 32. Bolt 36 inserted into 35,
Although it was attached by screwing into the projection 34, it may be attached by other methods.

In addition, the crater A to be attached to the second arm 24 is constructed by providing a concave groove 37 in the second arm 24, and fitting a slider 39 into the concave groove 37, which can be fixed at a predetermined position by tightening a bolt 38, as shown in the figure. A plate-shaped body 31 is provided at the tip of the rod member 4J0 projecting forward from the slider 39 and attached thereto in the same manner as the method for attaching the crater A of the first arm 23.

As shown in the figure, two parallel plate-like bodies 41 are provided in the middle of the rotating shaft 6, and two vibrators 42 that are parallel in the front and rear are fitted between the plate-like bodies 41, and the two vibrators 42 are inserted through pins 43. The vibrator 42 is rotatably attached to the plate-shaped body 41, and the connecting member 22 is slidably passed through the vibrator 42.
A stopper 44 (composed of a band and fasteners inserted through both ends of the band in the illustrated case) fixed to the connecting member 22 so as to stop the slider of the connecting member 22 with respect to the vibrator 42 is attached to the vibrator 42. By contacting both ends of the branch vibrator B'', the position of the crater A of the first arm 23 can be freely adjusted while sliding the connecting member 22 according to the diameter of the branch vibrator B''. Connecting part 2
2 can be pulled out to remove the first arm 23.

Further, the ends of two parallel arms 45, 45 constituting the first arm 23 are crossed on one side of the connecting member 22, and this crossing portion is rotatably supported by a pin 46, and the arms 45, Both ends of the connecting member 47 are rotatably connected via pins 48 to predetermined positions between both ends of the vibrator 45, and the tips of the parallel members 50 are rotatably attached to both ends of the vibrator 42 via pins 49. A cylindrical body 51 is fitted on the outside of the cylindrical body 6 and its end is fixed to the bearing 7, and an annular plate 52 is fitted on the cylindrical body 51 so that the cylindrical body 51 protrudes from both sides of the inner circumference of the annular plate 52. A rotor 54 rotatably supported at the end of the parallel member 50 is brought into contact with the surface of the annular plate 52, and a semicircular worm oil 55 provided on the back surface of the annular plate 52 is provided. By meshing a worm gear 57 with a handle 56 supported by the cylindrical body 51, the annular plate 52 can be tilted and the branch vibrator B1 can be cut diagonally.

In addition, by providing grooves 58 at the positions of the inclined plate 13 and the annular plate 52 in contact with the rotors 21 and 54 as shown in the figure, the rotors 21 and 54 can be guided.

The cutting device according to the present invention has the above configuration, and
When opening a hole C in the peripheral wall of the vibrator B as shown in FIGS. Set.

Also, while removing the first arm 23, the second arm 2
Set crater A to 4.

At this time, the distance between the crater A and the axis of the rotating shaft 6, and the hole C
The position of the crater A is adjusted so that the radius matches the radius of the crater A.

In addition, as shown in FIG.
(so that the lower edge of the inclined plate 13 protrudes forward), and the rotor 21 of the crater A and the rotating arm 20
Stop at the top level.

When the motor 8 starts operating and the rotary shaft 6 is driven, the crater A moves and is fused by the combustion gas from the crater A.

Further, as the rotating shaft 6 is driven, the gear 10 to the gear 12
Since the swing arm 20 is rotated twice for every one revolution of the rotating shaft 6, the swing arm 20 rotates half a turn (180 degrees) from the start of rotation of the swing arm 20 ( The slider 2 is pushed out from the top to the bottom of the inclined plate 13, and the remaining half circumference 180
0 during rotation (from the bottom to the top of the inclined plate 13)
While repeating the movement back and forth to pull back the slider 2, the distance between the peripheral wall of the vibrator B and the tip of the crater A remains unchanged, and the blowing is completed by one rotation of the second arm 24, and a hole is made in the vibrator B. Open C.

Next, when providing a cutout along the edge of the hole C (7) at the end of the branch vibe D, the connecting member 22 supports the end of the first arm 523, and the first arm 23 is detached from the second arm 24. Set crater A.

Further, the branch vibrator B1 is set so as to be horizontal on the support stand 59, and the crater A is positioned on the outer side 1 of the end of the branch vibrator B1.

At this time, the plate surface of the annular plate 52 is made vertical, and the crater A is positioned at the lowest point of the peripheral wall of the branch vibrator B1.

When the rotary shaft 6 is rotated once by the operation of the motor 8, the slider 2 is moved forward and backward by the rotating arm 20 and the inclined plate 13 in the same manner as described above, and the branch vibrator B1 is moved as shown in FIG. A cut-off portion D is formed at the end.

The above-mentioned cut-off portion D fixes the branch vibrator B1 to the vibrator B by close welding to the edge of the hole C(7) as shown in FIG. As described above, according to the cutting device of the present invention, the rotary arm rotates twice for each rotation of the rotation axis, and the end rotor of the rotary arm is attached to the plate surface of the inclined plate tilted at a predetermined angle. 180 of the rotating shaft
As the slider rotates, the slider slides back and forth once, so the distance between the crater attached to the first arm and the peripheral wall of the vibrator remains unchanged, and when it comes to opening the hole, it is possible to The tip attached to the second arm allows the end of the branch vibrator to be cut off so that it follows the periphery of the hole.

[Brief explanation of the drawing]

Embodiments of the present invention are shown in the drawings, in which FIG. 1 and 5 are side views, FIGS. 2 and 3 are enlarged longitudinal side views showing the guide portion of the rotor, and FIG. 4 is a view of the connecting member to the rotating shaft. An enlarged side view showing the installation, Fig. 5 is an enlarged side view showing the crater attached to the first arm, Fig. 6 is a partially cutaway enlarged plan view showing the vent attached to the second arm, and Fig. 7 shows the branch attached to the vibrator. FIG. 8 is a perspective view of the branch vibrator, FIG. 9 is a perspective view of the vibrator, FIG. 10 is a front view of the vibrator, and FIG. 11 is a longitudinal sectional side view thereof. A... Crater, B... Vibrator, B1... Branch vibe,
C...hole, D...cut-off part, 1...table,
2...Slider, 5...Tension spring, 6...Rotating shaft, 7...Bearing, 8...Motor, 9...Gear, 1
0...Gear, 11...Rotation axis, 12...Gear, 1
3... Inclined plate, 14... Leg material, 15... Horizontal vibe, 16... Zen, 17... Worm foil, 18...
... Handle, 19 ... Worm gear, 20 ... Swivel arm, 21 ... Rotor, 22 ... Connection member, 2
3...first arm, 24...second arm, 25...
・Vibe, 26... Rod material, 27... Connecting plate, 28.
・Zen, 29...Spring, 30...Rotor, 31...
- Plate-shaped body, 32... Arc-shaped groove, 33... Band, 34
...Protrusion, 35..Long hole, 36..Bolt, 37.
...Concave groove, 38...Bolt, 39...Slider, 4
0... Rod material, 41... Plate-shaped body, 42... Vibrator,
43... Zen, 44... Stop, 45... Arm.

Claims (1)

[Claims] 1. A slider that can move forward and backward to which a retreating force is applied, a rotating shaft supported on the slider so as to be rotated at a low speed by a motor, and a rotating shaft supported on the slider so as to rotate 2 times per 1 rotation of the rotating shaft; A detachable first arm is provided to protrude forward in parallel with the rotation shaft via a connecting member that intersects with the tip of the rotation shaft, and a second arm is provided to intersect at right angles to the tip of the rotation shaft. an arm, a gas cutting nozzle supported at the tip of the first arm so as to face the outer periphery of the branch pipe, a gas cutting nozzle supported at a predetermined position of the second arm so as to face forward, and the rear of the slider. an inclined plate for feeding the slider which is located at a position in which the tilt cannot be adjusted from vertical to a predetermined inclination angle; an L-shaped swing arm connected to the end of the swing shaft; and a pivot support at the end of the swing arm. A cutting device consisting of a rotor that is brought into contact with the plate surface of an inclined plate.