JPH0637846Y2 - Pipe cutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a pipe cutter for cutting a pipe.

[Conventional technology]

Conventionally, as a pipe cutter, for example, one shown in FIG. 5 is known.

In this pipe cutter, a U-shaped section 2 is formed at the lower end of a frame 1, and a pipe 9 is provided at a lower edge 4 of the U-shaped section 2.
Is formed with a groove 8 for holding. A support rod 5 is attached to the upper edge portion 3 of the U-shaped portion 2 in a vertically movable manner, and a rotatable circular blade 6 is attached to the tip of the support rod 5.
An adjusting screw 7 for adjusting the up and down movement of the support rod 5 is provided on the upper end of the frame 1.

When cutting a pipe using this pipe cutter, first, one end of the pipe 9 is fixed with a vise (vice) or the like (not shown). Then, the pipe 9 is inserted into the U-shaped section 2 of the frame 1, the adjusting screw 7 is rotated to lower the support rod 5 and the circular blade 6, and the pipe 9 is sandwiched between the circular blade 6 and the groove portion 8. . In this state, holding the frame 2 and rotating the pipe cutter around the pipe 9 about 2 to 3 times,
The pipe 9 can be cut.

[Problems to be solved by the device]

By the way, in such a conventional pipe cutter, when cutting the pipe, one end of the pipe must be fixed by some means such as a vise, and the entire pipe cutter must be rotated around the pipe. Therefore, the cutting work was complicated. Further, since this device is rotated around the pipe 9 without being fixed to the pipe 9, the angle of the blade of the circular blade 6 with respect to the pipe 9 is changed and does not always hit at a constant angle, and the cutting surface is displaced, There was a problem that it could not be cut accurately.

In particular, in the case of a member with an extremely small diameter such as an optical fiber, in order to cut only the pipe for the outer protective film, it is difficult to fix it with a vise because the diameter of the pipe is small, Due to the bending, it was very difficult to rotate this device around the pipe and cut only the outer pipe without damaging the inner signal transmission line.

Therefore, an object of the present invention is to facilitate the work of cutting a pipe, and even for a thin member such as an optical fiber, the depth of the circular blade with respect to the member can be finely adjusted to easily and effectively An object of the present invention is to provide a pipe cutter capable of cutting only the pipe for the outer protective film without damaging the transmission line.

[Means for Solving the Problems]

Means for solving the above problems are a shaft portion having an insertion hole through which a pipe is inserted in the longitudinal direction and a chuck mechanism for tightening the pipe, and a shaft portion rotatably attached to an upper end of the shaft portion. And a holder for holding the pipe fixed to the periphery of the hole, and a hole formed on the extension line of the insertion hole for inserting the pipe. A circular blade rotatably mounted so that the tip of the blade comes into contact with the pipe and an adjusting mechanism for finely adjusting the distance between the holding portion and the circular blade are provided on the side opposite to the pipe. That is, the pipe is cut by sandwiching and rotating the rotating body.

[Action]

The operation of the present invention will be described. First, the pipe is inserted from the chuck mechanism side of the insertion hole of the shaft portion to the hole portion of the rotating body, and then the pipe is tightened and fixed by the chuck mechanism. Then, the adjusting mechanism is adjusted to move the circular blade toward the holding portion so that the pipe is clamped by the circular blade and the holding portion. When the rotating body is rotated with respect to the shaft portion in this state, the blade of the circular blade rotates around the pipe simultaneously with the rotation of the pipe while scratching the surface of the pipe. The pipe can be cut by rotating the rotor about 2 to 3 times.

[Embodiment] A pipe cutter according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, this pipe cutter has a shaft portion 10 provided with an insertion hole 12 through which the pipe 30 is inserted in the longitudinal direction, and a screw 13 is turned below the insertion hole 12 to rotate the pipe 13 into the pipe cutter.
A chuck mechanism 11 for tightening the 30 is provided. Shaft 10
A rotating body 15 is attached to the upper end of the shaft so as to be rotatable in a plane perpendicular to the longitudinal direction of the shaft portion 10.

The base 14 of the rotating body 15 is provided with a hole portion 16 on an extension line of the insertion hole 12 of the shaft portion 10 so that the pipe 30 is inserted continuously with the insertion hole 12 and the hole portion 16. As shown in FIGS. 3 and 4, a holding portion 17 for holding the pipe 30 is fixed to the upper surface of the base plate 14 with a screw 19, and the pipe 30 is fitted into the holding portion 17 to secure the pipe 30. Concave groove that supports the side
18 are formed. In addition, the holding part 17
While a blade support base 20 for supporting the circular blade 22 is provided at a position facing with, a lever mechanism 40 for opening and closing the blade support base 20 at a position close to the holding portion 17 and the blade support base 20, and a circular blade 22. An adjusting mechanism 60 for finely adjusting the distance from the holding unit 17 is provided.

The blade support 20 has a circular blade 22 which rotates about a screw 23 as a center of rotation, at a position where the tip of the blade slightly protrudes from the inner surface of the blade support 20, and the angle of the blade is in the longitudinal direction of the pipe 30. It is mounted so that it is perpendicular to it. Then, on the outer surface of the blade support 20, the end portion is bent in a ring shape to form an annular portion 32.
The metal fitting 31 forming the is attached.

The lever mechanism 40 is configured with the adjusting mechanism 60, the arm 41, the lever 42, and an adjusting screw 45 provided therebetween as a center, and one end of the arm 41 is the annular portion 32 of the metal fitting 31.
And a pin 43 is attached to the other end. This pin 43 is provided with a screw hole 51, and the pin 43 is a lever.
An arm 41 and a lever 42 are fixed to each other by screwing an adjusting screw 45 through a screw hole 51 through an opening 50 formed substantially at the center in the longitudinal direction of 42. Further, the metal fitting 31 side of the lever 42 is rotatably attached to the substrate 14 by a pin 44.
A support hole 47 is formed in the. Then, one end of the adjusting screw 45 penetrates the support hole 47, and is fastened by fasteners 48, 49 at both ends of the support hole 47. For this reason, the adjusting screw 45 as the adjusting mechanism 60 is prevented from moving in the longitudinal direction by the pin 44 and is rotatable, and since the pin 43 is screwed into the screw hole 51, the arm 41 is rotated by rotating. And lever 42
It is provided so that the fastening position of and can be moved in the longitudinal direction and the distance between the circular blade 22 and the holding portion 17 can be finely adjusted via the metal fitting 31 and the blade support base 20. Adjustment screw 45
A groove portion 46 for inserting and rotating a driver or the like is provided at an end portion of the lever 42 side.

Next, the operation will be described. When cutting a pipe using this pipe cutter, first open the lever 42 and open the arm.
Move 41 toward fitting 31. Then the metal fitting 31 of the arm 41
The side end contacts the inside of the annular portion 32 of the metal fitting 31, and the metal fitting 31 and the blade support 20 rotate about the screw 21 as the center of rotation. When the lever 42 is closed, the tip of the blade of the rotary blade 22 which is approximately above the hole 16 is moved to the fourth position by operating the lever 42.
As shown in the figure, it moves laterally from above the hole 16.

Then, the pipe 30 is inserted from the chuck mechanism 11 side of the insertion hole 12 into the shaft portion 10 and the hole portion 16 of the rotating body 15 or in the opposite direction, and then the screw 13 of the chuck mechanism 11 is tightened to pipe. Tighten and fix 30. Then, lever mechanism 40
The lever 42 is closed and the pipe 30 is clamped by the concave groove 18 of the holding portion 17 and the circular blade 22 as shown in FIG.
At this time, the adjusting screw 45 of the adjusting mechanism 60 is rotated while being finely adjusted to move the fixing position of the arm 41 and the lever 42 in the longitudinal direction, and the circular shape with respect to the member via the metal fitting 31 and the blade support 20th. Make sure that the blade depth of blade 22 is moderate, or that it is a circular blade.
22 blades should come into contact with the pipe 30 with appropriate pressing force.

When the above operation is completed, the rotating body 15 is rotated about the shaft portion 10 by holding the shaft portion 10 about 2 to 3 times. Then the rotating body
At the same time as the rotation of 15, the circular blade 22 rotates around the pipe 30 while always contacting the surface of the pipe 30 and scratching it, while the angle of the blade always abuts perpendicularly to the longitudinal direction of the pipe 30, thus cutting. The surface is not displaced, and the pipe 30 can be cut surely and easily.

Therefore, according to the present embodiment, the chuck mechanism 11 inhibits the vertical movement of the pipe 30, and the concave groove of the holding portion 17 is used.
Since the pipe 30 is sandwiched by the 18 and the circular blade 22 to prevent the pipe 30 from moving in the horizontal direction, and moreover, the rotating body 15 is rotated in a plane perpendicular to the longitudinal direction of the shaft portion 10,
Vise for fixing the pipe 30 is no longer necessary,
Further, the angle of the circular blade with respect to the pipe 30 does not change and the cutting surface does not shift, and the pipe 30 can be cut easily and reliably.

In particular, even for a pipe having an extremely small diameter such as a pipe for a protective film such as an optical fiber, when cutting the pipe, the pipe is fixed by the chuck mechanism 11 of the shaft portion 10, and the pipe cutter is used. Since the rotating body 15 is rotated with respect to the shaft portion 10 of the device instead of rotating the whole body around the pipe, the pipe is neither bent nor displaced, and the cut surface may be displaced. Absent. In addition, the adjustment mechanism 60 makes it possible to finely adjust the stress when the circular blade 22 hits the pipe and the depth of the blade with respect to the pipe, so it is easy to use only the pipe without damaging the signal transmission line in the pipe. Can be cut and removed.

Further, in the present embodiment, since the lever mechanism 40 and the adjusting mechanism 60 are used together in order to make contact with the circular blade 22 and the pipe 30, in the case of the same pipe or pipes having the same diameter, the adjusting mechanism is used. The circular blade 22 can be applied to the pipe 30 in one operation by opening and closing the lever 42 without finely adjusting the 60, and the cutting operation can be greatly facilitated.

[Effect of device]

As described above, according to the present invention, the vertical movement of the pipe is prohibited by the chuck mechanism, and the horizontal movement of the pipe is prohibited by holding the pipe by the holding portion and the circular blade. Since the rotating body rotates in a plane perpendicular to the longitudinal direction of the part, a vise for fixing the pipe is not necessary, and the angle of the circular blade with respect to the pipe changes and the cutting surface is displaced. Without incident,
The effect that the pipe can be cut easily and surely is achieved.

In particular, even if the pipe is extremely thin, such as a pipe for a protective film such as an optical fiber, when cutting it, the pipe is fixed by the chuck mechanism of the shaft and the entire pipe cutter is attached to the pipe. Since the rotating body is rotated with respect to the shaft portion instead of being rotated around, the pipe is neither bent nor displaced, and the cut surface is not displaced. In addition, the adjustment mechanism makes it possible to finely adjust the stress when the circular blade hits the pipe and the depth of the blade with respect to the pipe, so you can easily cut only the pipe without damaging the signal transmission line in the pipe. Can be removed.

[Brief description of drawings]

1 is a perspective view showing a pipe cutter according to an embodiment of the present invention, FIG. 2 is a partial cross-sectional view of FIG. 1, FIG. 3 is a partial cross-sectional view showing a main part of FIG. 1, and FIG. FIG. 5 is a perspective view showing a state in which the lever mechanism is opened, and FIG. 5 is a perspective view showing a conventional pipe cutter. 10 …… Shaft 11 …… Chuck mechanism 12 …… Insertion hole 14 …… Rotator 16 …… Hole 17 …… Holder 22 …… Circular blade 60 …… Adjustment mechanism

Claims (1)

[Scope of utility model registration request] 1. A shaft member having an insertion hole for inserting a pipe in the longitudinal direction and having a chuck mechanism for tightening the pipe, and a rotary member rotatably attached to the upper end of the shaft member. A hole is formed in the body on the extension line of the insertion hole and through which the pipe is inserted, a holding portion that is fixed around the hole and holds the pipe, and is rotatably attached to the side facing the holding portion. A circular blade and an adjusting mechanism for finely adjusting the distance between the holding portion and the circular blade are provided, the pipe is sandwiched by the circular blade and the holding portion, and the pipe is cut by rotating the rotating body. A pipe cutter characterized by.