JPS588470Y2 - Cutter for synthetic resin pipe - Google Patents

Description

[Detailed explanation of the idea] This proposal relates to a cutter for cutting synthetic resin pipes.

There are already manual pipe cutters for metal pipes, but these use a disc-shaped blade that rotates to press into the pipe and cut it.

Metal pipes can be cut into a straight shape with this cutter.

However, synthetic resin pipes are more flexible than metals, but when they are cut with the cutter mentioned above, the resin deforms during cutting, resulting in thicker walls at the ends of the cut pipes. , a problem arises in which the part needs to be resected.

Therefore, conventionally, cutting has been carried out using a saw, but this causes problems such as the cut being slanted.

At the same time, large diameter pipes are difficult to cut.

This proposal solves the above problems.

To explain this with reference to the embodiment shown in the drawings, reference numeral 1 denotes a pipe-shaped handle, and a screw 2 is provided on the outer circumferential surface of one end of the handle.

A pipe-shaped connecting body 3 is fixed to the end of the handle 1 on which the screw 2 is provided, and is made to protrude from the handle 1, and a ring-shaped concave groove 4 is provided on the outer peripheral surface of that part.

Reference numeral 5 denotes a screw shaft inserted into the handle 1 and the connecting body 3, one end of which is engaged with a screw on the inner peripheral surface of the connecting body 3, and the handle 1
A knob 6 is fixed to the other end of the screw shaft 5.

The screw shaft 5 can also be engaged with a thread provided on the inner surface of the handle 1.

One end of the knob 6 is inserted into the handle 1 so that it can move forward and backward, but if it can be moved forward and backward together with the screw shaft 5, the end of the handle 1 may be inserted into one end of the knob 6.
In addition, if the screw shaft 5 is supported by the handle 1, the handle 1
There is no need to insert part of the knob 6 inside the knob 6.
It would be better if the rotation of the screw shaft 5 could be made easier.

Reference numeral 7 designates a pipe-shaped support body, into which the connecting body 3 is rotatably inserted, and a support pin 8 such as a small screw provided through the peripheral wall of the support body 7 is inserted into the recess of the connecting body 3. Inserted into the groove 4, the support 7 is rotatably and irreleasably attached to the coupling body 3.

Reference numeral 9 denotes a rod-shaped blade which is inserted movably in the axial direction into the support 7 while overlapping the end of the screw shaft 5, and whose cutting edge is perpendicular to the direction of rotation of the arm 15. The base is fixed to the shaft body 10 and inserted into the support body 7.

However, the base of the cutter 9 can also serve as the shaft 10.

11 is a part of the peripheral wall of the support body 7 that overlaps with the base of the cutter 9,
A long hole 12 provided in the axial direction is inserted into the long hole 11,
A lock pin fixed to the shaft body 10 prevents the cutter 9 from escaping from the support 7 and allows it to move within the length of the elongated hole 11.

A spring 13 is provided between the lock pin 12 and the support 7, and urges the cutter 9 toward the screw shaft 5.

Reference numeral 14 denotes a pipe-shaped moving body disposed on the thread 2 of the handle 1 so as to mesh with the screw 2, and 15 indicates a pipe-shaped support member having one end pivoted at an opposite position on the outer peripheral surface of the moving body 14. A pair of arms are each pivoted on a shaft perpendicular to the axis of the handle 1, and each pair is curved in an arc in opposite directions in the direction of rotation.

Although the arms 15 on the same side of the movable body 14 are coaxially attached, they can also be attached independently.

Reference numeral 16 denotes a roll that is attached to a pair of arms 15 on different sides of the movable body 14 with the part on the side of the support body 7 protruding from the arm 15 between their tips, and is divided into each arm 15 side or the roll between the arms 15 is Provided along the entire length.

Reference numeral 17 denotes a roll mounted on the same axis at opposite positions on the outer peripheral surface of the support 7, with one end thereof protruding from the tip of the support 7, and its axis line parallel to the roll 16.

18 is provided parallel to the rotating direction of the arm 15, and each arm 1
5 with a link that rotates one end of the link to each arm 15,
The other ends are each pivoted to the support body 7.

If the link 18 is attached to the support 7 coaxially with the roll 17 as in the embodiment, it is suitable for making the axes of the rolls 16 and 17 parallel. It can also be installed on 7.

A pair of links pivoted on the same side of the support 7 are
When the rolls 16.16 approach each other, they form chevrons,
The pivot position for the arm 15 is selected so that the arm 15 can be opened and closed.

19 is a synthetic resin pipe. The blade 9 has its cutting edge A
The blade has a certain length in the direction perpendicular to the direction of movement of the blade 9, or the blade edge A is made into a V-shape and the pipe is cut on two sides of the blade to cut a part of the synthetic resin pipe. Use what you have.

The configuration of this pipe cutter is as described above, and when the handle 1 is rotated, the moving body 14 engaged with the screw 2
moves.

Then, since the arm 15 whose end is pivoted to the movable body 14 is connected to the support body 7 through the link 18 at its intermediate portion, the arm 15 opens and closes.

When the handle 1 is rotated, the connecting body 3 also rotates, but the screw shaft 5 also rotates at the same time, so the screw shaft 5 does not move forward or backward.

Then, when only the screw shaft 5 is advanced or retracted via the knob 6, the cutter 9 is advanced or retracted within the range of the length of the elongated hole 11.

When cutting a synthetic resin pipe, the blade 9 is retreated into the support 7, and the arm 15 is opened by rotating the handle 1, as shown by the chain line in FIG. After inserting the pipe 19, the handle 1 is rotated in the opposite direction to close and tighten the arm 15, and the roll 16,
The pipe 19 is held between 16 and 17.

At this time, since the rolls 16, 16, and 17 clamp a certain length range of the pipe 19, the cutter and the pipe 19 are integrated, and the cutter is not inclined in the axial direction of the pipe 19.

After the cutter is attached to the pipe 19, the screw shaft 5 is advanced through the knob 6, and the cutter 9 is pressed against the circumferential surface of the pipe 19.

Then, with the pipe 19 in a fixed state, the cutter is rotated around it via the rolls 16 and 17, and the blade 9
The pipe 19 is cut by repeatedly cutting a part of the circumferential surface of the pipe 19 and advancing the blade 9 appropriately through the screw shaft 5.

After cutting is completed, the arm 15 is opened by rotating the handle 1, and the cutter is separated from the pipe 19.

As mentioned above, since the cutter of the present invention cuts a part of the synthetic resin pipe with the blade 9, there is no fear that the wall of the cut end of the pipe will become thick, and the pipe after cutting will not be damaged. Easy to use.

Since the rolls 16.17 are spaced apart along the axis or are provided along the entire length between the arms 15.15, when the cutter is attached to the pipe via these rolls, the cutter is not inclined in the axial direction of the pipe. becomes impossible and becomes integral with the pipe.

Therefore, it is easy to rotate the cutter around the pipe, and the start and end points of cutting by the blade 7 are likely to coincide, and misalignment of the cutting position can be prevented, resulting in clean cuts. Moreover, the dimensional accuracy of cutting can be improved.

Further, the forward movement of the blade 9 during cutting is also easy.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is an enlarged sectional view of the handle portion. 1: Handle, 2: Screw, 3: Connector, 4: Concave groove, 5:
Screw shaft, 6: Knob, 7: Support, 9: Cutting tool, 11: Long hole, 12: Lock pin, 13: Spring, 14: Moving body, 1
5: Arm, 16.17: Roll, 18: Link.

Claims (1)

[Scope of utility model registration request] A pipe-shaped handle 1 has a screw 2 on the outer periphery of one end, and a pipe-shaped connecting body 3 is fixedly protruded from the end thereof, and the connecting body 3 is rotatably inserted into a pipe-shaped support 7. The handle 1 and the connecting body 3 are attached to the support body 7 in a non-detachable manner, and are engaged with the threads on the inner surface of the handle 1 or the connecting body 3.
A screw shaft 5 is inserted into the support body 7, and a rod-shaped cutter 9 is inserted into the support body 7 so as to be movable in the axial direction of the support body 7 so as to overlap the tip of the screw shaft 5. A lock pin 12 inserted into a long slot 11 is fixed to the blade 9, and the blade 9 is urged in the direction of the screw shaft 5 by a spring 13 via the lock pin 12, and the screw 2 is attached to the outer periphery of the handle 1.
One end of each pair of arms is pivotally attached to the radial axis of the handle 1 at each opposing position on the outer periphery of the pipe-shaped movable body 14, which is attached so as to be engaged with the handle. Between the tips of a pair of arms that are curved in opposite directions in the direction of movement and opposed in a direction perpendicular to the rotation direction, a roll 16 is installed over both ends or the entire length of the arms, and the part on the side of the support body 7 is connected to the arm. A roll 17 is attached to protrude from 15 and is located at an opposite position on the outer surface of the support 7.
A part of the rolls 16 and 17 are mounted on the same axis with a part thereof protruding from the tip of the support 7, the axes of the rolls 16 and 17 are parallel to each other, each arm 15 is connected to the support 7 by a link 18, and the cutter is Synthetic resin pipe cutter that can cut part of the pipe