JPH08276396A - Paper tube cutting method and its device - Google Patents

Abstract

PURPOSE: To cut a paper tube with no burr left behind at its cutting edge. CONSTITUTION: In the cutting method for a paper tube 7 where cutting is done with a cutting blade 43 placed to the paper tube 7 while the paper tube fitted in a cutting core 2 is being rotated, a roller 5 is pressed against the paper tube 7 while being laid across both sides of a predetermined cutting line for the paper tube 7, and cutting is performed while the rotation of the paper tube 7 at a rotation driving side is transmitted to the other paper tube 7 at the opposite side via the roller 5 while the predetermined cutting line is being held. Since the paper tubes holding the cutting blade 43 is integrally rotated via the roller 5, no burr will be left behind at the cutting edge.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for beautifully cutting a paper tube.

[0002]

2. Description of the Related Art A paper tube cutting device is a high-performance device that can automatically set a cutting length under computer control and can cut two or more pieces at a time. Various devices have been put to practical use, but the cutting method is common.

A method of cutting the paper tube will be described with reference to a manual type device shown in FIG. The paper tube cutting device includes a base (1)
A cutting core (2) is provided laterally with one end fixedly supported thereon, and a rotation driving device (3) for a paper tube (7) is provided on the fixed side of the cutting core (2). A blade guide member (13) is provided in parallel with the cutting core (2).

A tool post (4) having a circular cutting blade (43)
The blade guide member (13) is provided so as to be slidable and rotatable in a plane perpendicular to the sliding direction. Tool post (4)
Is formed by projecting an arm (42) on a slide block (41) slidably fitted in a blade guide member (13) at right angles to the sliding direction, and a circular cutting blade is provided at the center of the arm (42). (43)
Is freely rotatable. Attach the gauge shaft (45) to the base end of the arm (42) in parallel with the blade guide member (13), and
5) The contact piece (46) is slidable, rotatable, and axially positionable.

Then, the paper core (7) is fitted into the cutting core (2) to
The end of (7) is clamped by the rotation driving device (3) and driven to rotate. Paper tube (7) while looking at the scale (47) on the gauge axis (45)
The contact piece (46) is positioned at the position corresponding to the cutting length of, and the tool rest (4) is slid until the corresponding piece (46) hits the end face of the paper tube (7). The arm (42) is pushed down when the end surface of the tube (7) is hit, and the cutting blade (43) is pressed against the paper tube (7) to cut. When the cutting is completed, the arm (42) is lifted, and the cut paper tube (7) is pulled out of the core (2). The above procedure is repeated to cut the paper tube (7).

[0006]

In the method for cutting the paper tube (7), the paper tube (7) is cut while sliding on the fixed cutting core (2) and rotating. From the scheduled cutting line of the paper tube (7), to the rotational drive side portion (hereinafter, in the raw tube side portion (7a), the rotary drive device (3) is forcibly turned while the rotating drive device (3) is operating, and The contact piece (46) side (hereinafter, the partition product part (7b)) is
It rotates by being connected to (7a).

Immediately before the completion of cutting, the raw tube side portion (7a) of the paper tube (7) and the partitioning product portion (7b) are connected only by a small portion of the inner circumference of the paper tube (7). Sufficient torque is not transmitted to the partitioning product part (7b) of the paper core (7) from the rotary drive side, and it tries to stop rotation by friction with the cutting core (2),
There is a difference in rotation speed between the two.

As described above, just before the cutting is completed, the cutting blade (4)
Due to the speed difference between the paper tubes (7) on both sides of (3), the paper tubes
The final cut portion of (7) is torn off, and that portion becomes a burr and protrudes from the cut end surface. Conventionally, the burrs on the cut end surface of the paper tube (7) have been manually removed by an operator, resulting in poor work efficiency. The present invention clarifies a cutting method and a device in which a burr does not occur on a cutting end surface, and solves the above problem.

[0009]

According to the method of the present invention, a paper tube (7) which is cut by applying a cutting blade (43) to the paper tube (7) while rotating the paper tube (7) fitted in the cutting core (2). ), The roller (5) is pressed against the paper tube (7) straddling both sides of the planned cutting line of the paper tube (7) to rotate the paper tube (7) on the rotation drive side by the roller (5). It is characterized in that the paper tube (7) is cut while being transmitted to the paper tube (7) on the opposite side via the planned cutting line via 5).

The device of the present invention is provided with a cutting core (2) laterally arranged on a base and one end of the cutting core (2).
Rotary drive device (3) for rotating paper tube (7) fitted in (2)
And a cutting blade (43) provided on the cutting core (2) so as to be able to approach and separate in a plane orthogonal to the cutting core (2).
While rotating the paper tube (7) fitted in (2), the cutting blade (43) is
In a cutting device that cuts by applying (7), a pressing roller (5) is provided near a cutting position of the paper tube so as to approach and separate from the cutting core (2) from a direction orthogonal to the cutting core (2). I have.

[0011]

[Operation and Effect] When the roller (5) is pressed across the raw tube side portion (7a) and the partitioning product portion (7b) with the cutting blade (43) of the paper tube (7) interposed therebetween, the cutting blade (43) is pressed. Regardless of the depth of cut, the rotation of the tube side part (7a) is performed via the roller (5) through the partitioning product part (7b).
Is transmitted to Therefore, it is possible to prevent burrs from being generated on the cut end surface immediately before the completion of cutting due to a difference in the rotation speed between the paper tubes 7 on both sides of the cutting blade 43 as in the related art. Since the roller (5) may be attached to the conventional cutting device, it is possible to suppress an increase in equipment costs.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The cutting apparatus of the embodiment shown in FIG. 1 is obtained by adding a roller (5) which is a feature of the present invention to the conventional cutting apparatus shown in FIG. Cutting core (2) on horizontal base (1), said cutting core
Next to (2), the blade guide member (13) is arranged in parallel and horizontally.

The cutting core (2) and the blade guide member (13) are each a base.
The cutting core (2) is formed to have the same length as the entire length of (1), and one end of the cutting core (2) passes through the receiving bracket (11) on the base (1) and is cantilevered by the fixing bracket (12). Is fixed. The blade guide member (13) is a round shaft, and both ends are supported by support plates (15) (15) projecting from both sides of the base (1).

A rotary drive (3) for the paper tube (7) is provided on the fixed side of the cutting core (2). The rotation driving device (3) rotatably fits the pulley (31) to the cutting core (2), and connects the pulley (31) with a reduction motor (not shown) via a belt (32). (31)
Is provided with a clamp portion (33) for clamping the proximal end of the paper tube (7).

A tool rest (4) is slidably arranged on the tool guide member (13). The tool post (4) is a tool guide member (1
3) a slide block (41) fitted to be slidable,
An arm (42) protruding from the slide block (41) orthogonally to the blade guide member (13), and a circle supported in the center of the arm (42) in a plane orthogonal to the blade guide member (13). It is composed of a cutting blade (43).

The cutting blade (43) is fixed by a lock screw (43a) and is rotatably supported by loosening the screw. If the cutting blade is used in a fixed state and is partially worn, the lock screw (43a) is used. ) Is loosened, the cutting blade (43) is rotated by a predetermined angle, a new cutting edge is opposed to the cutting core (2), and the lock screw (43a) is tightened again for use. That is, in the embodiment, the cutting blade (43) is not rotated during cutting. However, the present invention is not limited to this, and the rotary blade (43) can be supported in a freely rotatable state and pressed against the rotating paper core to cut the paper core.

A handle (44) projects from the distal end of the arm (42), and a gauge shaft (45) extends parallel to the blade guide member (13) at the proximal end.
A contact piece (46) is provided on the gauge shaft (45) so as to be slidable, rotatable, and positionable.
The slide block (41) is provided with a roller (5) slidably along with the cutting blade (43).

The slide block (41) is provided with the leg pieces (4
00) is projected, and an arm piece (401) is provided at the lower end of the leg piece so as to be rotatable in a plane orthogonal to the cut core, and a bearing box (402) is provided with a cut core (402) at the tip of the arm piece. It is rotatably supported in the plane along the direction of 2), and the cutting core (2) is supported by the springs (408) (408).
It is urged to be parallel to. Bearing box
Two bearings (403) (403) deployed at both ends of (402)
A shaft (404) is rotatably supported through the shaft, and rollers (5) and (5) are attached to both ends of the shaft (404). The outer peripheral surface of the roller (5) is formed of a material having a large coefficient of friction, such as rubber.

The arm piece (401) is linked by a cylinder (405), and the cylinder is integrated with the slide block so as to be movable along the cutting core (2).
Supported above.

Then, the paper tube (7) is fitted on the cutting core (2), and the end portion of the paper tube (7) is clamped by the clamp portion (33) of the rotary drive device (3). Cutting blade (43) on the cutting line of paper tube (7)
And actuate the rotary drive (3) to turn the handle (44)
To cut the cutting blade (43) into the paper tube (7). At the same time, the cylinder (405) is operated to press the roller (5) across both sides of the cutting line of the paper tube. The bearing box (402) supporting the shaft (404) of the roller (5) is kept substantially parallel to the cutting core (2) by the bias of a spring, and the rollers (5) and (5) are surely fixed to the cutting core (4). 2) Hit the upper paper tube.

The raw tube side portion (7a) of the paper tube (7) and the partitioning product portion
When the roller (5) is pressed across the (7b), the rotation of the tube side part (7a) is performed via the roller (5) regardless of the cutting depth of the cutting blade (43). It is transmitted to the part (7b).
Therefore, it is possible to prevent burrs from being formed on the cut end face due to a difference in rotation speed between the raw tube side portion (7a) and the partition product portion (7b) immediately before the completion of cutting as in the conventional case.

FIG. 4 shows another embodiment of the roller (5). The roller (5) is formed to be long in the axial direction, and is provided so as to be rotatable in a plane perpendicular to the cutting core (2). The roller (5) is rotatably arranged on a bracket (407) supported substantially parallel to the cutting core (2) by means of a spring (408) (408) swingable at the tip of the arm piece (401). I have. The roller (5) shown in FIG. 4 is also a roller that straddles the raw tube side portion (7a) of the paper tube (7) and the partition product portion (7b).
When (5) is pressed, the rotation of the paper tube (7) on the rotation drive side is transmitted to the opposite paper tube (7) via the roller (5) regardless of the cutting depth of the cutting blade (43). Therefore, just as before, immediately before the completion of the cutting, as in the conventional case, the difference occurs in the rotation speed between the raw tube side part (7a) and the partitioning product part (7b), and burrs are generated on the cut end face. Can be prevented.

The present invention is not limited to the one in which the lateral movement of the cutting blade (43) is performed manually, and the data such as the cutting length is automatically input by the computer control so that the cutting length is automatically adjusted. From setting to cutting, and fully automatic cutting device for cutting and extracting the paper core from the cutting core (2), it can be carried out regardless of model.

[Brief description of drawings]

FIG. 1 is a perspective view of a manual cutting device.

FIG. 2 is a cross-sectional view of a main part when a paper tube is cut.

FIG. 3 is a cross-sectional view of a roller support.

FIG. 4 is a front view of another embodiment of the roller.

FIG. 5 is a perspective view of an example of a conventional cutting device.

[Explanation of symbols]

 (2) Cutting core (3) Rotation drive device (43) Cutting blade (5) Roller

Claims (2)

[Claims] 1. A paper tube cutting method for cutting a paper tube by applying a cutting blade (43) to the paper tube while rotating the paper tube (7) fitted in the core (2). Roller over (5)
Is pressed against the paper tube, and the rotation of the paper tube on the rotation drive side is rotated by a roller
Cutting the paper tube while transmitting the cut line to a paper tube on the opposite side with the cutting line interposed therebetween. 2. A cutting core disposed laterally on a base (1).
(2), a rotary drive device (3) provided at one end of the cutting core (2) for rotating a paper tube (7) fitted in the cutting core (2), and the cutting core (2)
And a cutting blade (43) arranged so as to be able to approach and separate in a plane orthogonal to the cutting core (2), and the cutting blade (43) is rotated while rotating the paper tube fitted in the cutting core (2) In a cutting device that cuts the paper core against the paper core, cut the core near the planned cutting position of the paper core.
A pressing roller (5) is provided so as to be able to approach and separate from the cutting core (2) from a direction orthogonal to (2), and the pressing roller (5) is urged into contact with both sides of the cut line of the paper tube. A paper tube cutting device capable of cutting the paper tube while transmitting the rotation of the paper tube on the rotation drive side to the paper tube on the opposite side across the cutting line via the roller (5).