JPS5813318B2 - Square tube cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Conventionally, rectangular tubes, particularly rectangular paper tubes, have been cut with a saw, but the cut surface is rough and it is difficult to automatically cut them to a fixed size.

Furthermore, even among square tubes, it is difficult to easily cut tubes with rounded corners or trapezoids or other shapes with rounded edges to a fixed size. aims to provide a novel square tube cutting device that improves these conventional drawbacks, and has developed a shaft for inserting a square tube into which a square tube to be cut is attached, and a shaft for inserting a square tube into which the square tube to be cut is attached. A cam having a similar enlarged shape and an arm having a rotationally driven cutter at one end are rotatably attached to the frame, and a driving device is provided to rotate the square tube insertion shaft and the cam at the same angular velocity. , the cutter at one end of the arm is orthogonally brought into contact with the shaft for inserting a square tube, and the other end of the arm is pressed against the cam, following the cam, the cutter is attached to the shaft for inserting a square tube. It is configured to move relatively along the

Next, one embodiment of the present invention will be described in detail with reference to the drawings.

That is, as shown in FIGS. 1 and 2, one end of an arm 5 rotatably provided with a roller 4 at the end is connected to a shaft 3 supported by bearings 2 and 2 provided on a frame 1, The vicinity of the end of this arm 5 is connected to a shaft 7 connected to an air cylinder 6 by a pin 8, so that the roller 5 is pressed so as to always come into contact with the cam 17 during cutting.

A cutter holding shaft 10 is provided on the shaft 3 by arms 9 and 9, and this holding shaft 10
At least one rotary cutter 11 is inserted into the shaft 10, adjusted and fixed by sliding on this shaft 10 depending on the length of the tubular material to be cut.

This rotary cutter 11 is connected to a shaft 13 supported by bearings 12 and 12, and a tubular object insertion shaft 140 rotates coaxially therewith via a chuck 53.
Mounted in contact with the surface.

On the other hand, a shaft 16 is supported on the frame 1 by bearings 15 and 15, and a rotary cam 17 enlarged with a similar material to the tubular object to be cut is attached to this.

This rotating cam 17 must be installed so that its rotating surface can come into contact with the roller 4 attached to the end of the arm 5 after the air cylinder moves forward.

The shafts 13 and 16 are connected to a power source by transmission means such as belts, chains, gears, etc.

For example, the power from the motor 18 is transferred from the pulley 19 to V
This is transmitted to a pulley 21 via a belt 20, which is transmitted from a coaxial pulley 22 to a pulley 24 via a V-belt 23, and from this pulley 24 via a V-belt 25 to a pulley 26. The power is transmitted and gradually decelerated to rotate the rotary cutter 11 attached to the shaft 10 connected to the rotation axis of the pulley 26.

The pulley 22 is also provided with a coaxial K7"-rear 29 with a shaft 28 supported by bearings 27 and 27.

The power from this pulley 29 is transmitted to a pulley 32 supported by a bearing 31 via a belt 30;
The transmission is transmitted from a pulley 33 provided coaxially to the pulley 35 via a V-belt 34, and from a pulley 36 provided coaxially thereto to a pulley 38 via a V-belt 37. Sprocket 41 coaxially provided on pulley 38 by shaft 40 supported on 39 and 29
It is transmitted to the sprocket 43 via the chain 42 while being gradually decelerated.

A sprocket 46 is coaxially provided on this sprocket 43 by a shaft 45 supported by bearings 44 and 44, and a chain 4 is connected to the sprocket 43 from this sprocket 46.
7, the shaft 13 and the tubular object insertion shaft 14 connected thereto are rotated by the power transmitted to the sprocket 48 fixed to the shaft 13 supported by the bearings 12 and 12 and gradually decelerated. be done.

On the other hand, the power from a sprocket 49 provided coaxially on the shaft 40 is reduced in speed and transmitted to a sprocket 51 having the same rotation axis as the shaft 16 via a chain 50.

This reduced power rotates the rotary cam 17 at the same angular velocity (rotation speed) as the shaft 14.

The tubular material cutting device constructed in this manner is used in the following manner.

That is, the shaft 14 for inserting a tubular object is attached in accordance with the inner diameter of the tubular object, and the angle of the arm 9 is adjusted to insert the cutter 1.
1 is brought into contact with the shaft 14, the tubular object 52 to be cut is inserted into it, and the switch is turned on.The air cylinder 6 moves forward in response to an electrical signal, and the shaft 7 extends to form an arm using the shaft 3 as a fulcrum. 5. The roller 4 attached to the end is always pressed against the cam 17.

On the other hand, the power of the motor 18 that operates at the same time is reduced by the above-mentioned transmission means, for example, at a rotation speed of 20 rpm.
．． p. Rotate cam 1γ with m.

The roller 4 also rotates due to the 170 rotations of the cam, and the cam 17
The cutter 11 moves along the outer circumference of the cutter 11 via the arm 5.
, for example, tell the knife.

That is, the cutter 11 moves according to the shape of the tubular object 52 and cuts the tubular object.

In this case, the shaft 14 into which the tubular member 52 has been inserted is rotated at the same angular velocity (rotational speed) as the cam 17 while being decelerated by the aforementioned transmission means from the motor 18 .

Further, the cutter 11 is also rotated by the reduced power transmitted from the motor 18 by the above-mentioned transmission means.

After cutting the square tube, the switch is turned off, the air cylinder 6 moves backward, and the roller 4 separates from the cam 17.

As described above, the method for cutting a tubular object according to the present invention is as follows:
A cutter 11 attached to one end of the arm 5 is brought into contact with the rotating tubular object 52, and an enlarged rotating cam 17 having a similar shape to the tubular object 52 and having the same rotation speed is attached to the other end of the arm 5. the shape of the cam 17 with the cutter 1
1, so not only can the cut surface be sharp, but it can also be used to cut tubular objects of arbitrary shapes, such as round tubes, square and trapezoidal tubes with rounded corners, and tubes with concave surfaces. Can be cut extremely easily.

Further, in the tubular object cutting device according to the present invention, a cutter 11 is attached to the tip of an arm 5 whose one end is held, and the cutter 11 is arranged to intersect at a substantially right angle to the axial direction of the tubular object insertion shaft 14 that rotates the cutter 11. On the other hand, at the other end of the arm 5, a cam 17 enlarged to have a similar shape to the tubular object 52 to be cut and rotating at the same angular velocity as the shaft 14 is brought into contact with the end of the arm 5. Since the shape of the cam 17 follows the cutter 11, by arbitrarily selecting the shape of the cam 17, a tubular object of any shape can be cut by cutting only the thick part thereof.
The tubular object can be easily cut, and by adjusting the angle of the arm 90, it can be cut into any size.

Further, the cam 17 has the advantage that it is extremely easy to replace.

Further, since the arm 5 constantly presses the roller 4 attached to the end of the arm 5 by the shaft 7 connected to the air cylinder 6 at its intermediate portion, the cam 1
The shape of the outer periphery of the cutter 7 is completely transmitted to the shape of the cutter 11, so that a tubular object of any shape can be cut very easily.

Moreover, the cutting operation is also extremely simple.

Therefore, it is extremely useful for cutting tubular objects of any shape, especially paper tubes.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing an embodiment of a tubular object cutting device according to the present invention, and FIG. 2 is a plan view thereof. 1...Frame, 2, 12, 15, 27, 31
, 39, 44...Bearing, 3, 7, 10, 13,
16, 28...Shaft, 4...Roller, 5...Arm, 6...Air cylinder, 8...Pin, 9... ...Arm, 11
... Cutter, 14 ... Shaft for inserting tubular object, 17 ... Cam, 18 ... Motor, 19, 21, 22, 24, 26, 29 ,32,3
3, 35, 36, 38... Pulley, 20, 23
, 25, 35, 37...V belt, 41, 43
, 46, 48, 49, 51... sprocket,
42, 47, 50...Chain, 53...
··Chuck.

Claims (1)

[Claims] 1. A shaft for inserting a square tube into which a square tube to be cut is attached, an arm having a cam of a similar shape enlarged to the shaft and a cutter rotatably driven at one end are rotatably attached to the frame, and , a drive device for rotating the square tube insertion shaft and the cam at the same angular velocity, and a cutter at one end of the arm is brought into contact with the square tube insertion shaft at right angles; A device for cutting a square tube, the cutter being moved relatively along the shaft for inserting a square tube by pressing the end of the cutter against the cam and following the cam.