JP2914965B1 - Paper tube cutting device - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To cut a paper tube without causing burrs on a cut end face. An apparatus for cutting a paper tube by pressing a cutting blade 7 against a predetermined position of the paper tube while forcibly rotating the paper tube while holding one end of the paper tube fitted in a core 2 is provided. Blade 7
The belts 9 and 91 are stretched and disposed on both sides with a common pulley 83 therebetween, and when the cutting blade 7 bites into the paper tube, the belt 9 and 91 are pressed in the same direction as the pressing direction of the cutting blade 7 against the paper tube.
91 presses the paper tube, and the belt 9 on the rotation driving side of the paper tube travels due to friction with the paper tube, and the other belt is driven via the pulley 83.
The paper core can be cut while transmitting the forced rotation of the paper core to the paper core on the opposite side of the cut line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A paper tube is cut by fitting the paper tube into a cutting core, pressing one end of the paper tube with a rotary drive device and forcibly rotating the paper tube while pressing a cutting blade against the paper tube. In the cutting of the paper tube, the paper tube is cut while sliding on the core and rotating. However, in the portion on the rotary drive side from the cut line of the paper tube (hereinafter, referred to as the raw tube side portion), the rotary drive device is forcibly turned while the rotary drive device is operating, and the portion on the opposite side from the cut line ( Hereinafter, the partition product portion) is rotated by being connected to the tube side portion.

Immediately before the completion of cutting, the raw tube side portion of the paper tube and the partitioning product portion are connected only at a small portion of the inner periphery of the paper tube, and the partitioning product portion of the paper tube is connected to the rotating drive side portion. Sufficient rotational force is not transmitted, and an attempt is made to stop rotation due to friction with the core, resulting in a difference in rotation speed between the two.

[0004] As described above, just before the completion of cutting, a speed difference is generated between the paper tubes on both sides of the cutting blade, so that the final cut portion of the paper tube is cut apart, and that portion becomes a burr and is cut from the cut end face. Protrude. Conventionally, the burrs on the cut end surface of the paper tube have been manually removed by an operator, resulting in poor work efficiency.

In order to solve the above-mentioned problem, the applicant has proposed a cutting device shown in FIGS.
599580). The above device has an axis (9
Rollers (92) and (92) are attached to both ends of 3) so that they can rotate integrally with the shaft (93).
(92) By pressing (92), the rotation of the raw tube side portion P1 (rotation drive side) of the paper tube P is performed via the roller (92) and the shaft (93), with the partition product on the opposite side across the cut line. It is characterized in that the paper tube can be cut while transmitting to the portion P2.

[0006] The tube side portion P1 of the paper tube P sandwiching the cutting line
When rollers (92) and (92) are pressed against the partition product part P2,
Irrespective of the cutting depth of the cutting blade 7, the rotation of the tube side portion P1 is transmitted to the partitioning product portion P2 via the roller 92 and the shaft 93. Therefore, it is possible to suppress the occurrence of burrs on the cut end surface just before cutting due to the difference in the rotation speed between the raw tube side portion P1 and the partition product portion P2.

[0007]

The paper tube cutting device shown in FIGS. 5 and 6 presses the surface of the paper tube P with a roller (92).
The contact between the roller (92) and the paper tube P is linear contact, and the contact area is small, so that a slip occurs, and the peripheral speed of the raw tube side portion P1 and the partitioning product portion P2 sandwiching the cutting blade (7) of the paper tube P is reduced. There is a difference.

The cutting blade (7) and the roller (92) are each provided with a lever.
(94) Since they are supported by (95) and are arranged facing each other on the diameter line of the paper tube P, the rollers (92) and (92) are opposite to each other in the direction in which the cutting blade (7) bites into the paper tube. ) Presses the paper tube P. Therefore, as shown in FIG. 7, the clearance between the core (2) and the paper tube P causes the raw tube side portion P1 and the partition product portion P2 sandwiching the cutting blade (7) of the paper tube P to be bent in a V-shape. That is, at the biting portion of the cutting blade (7), a pulling force acts on the inner surface side of the paper tube.

[0009] As described above, the paper tube P
A difference occurs in the peripheral speed between the raw tube side portion P1 and the partitioning product portion P2, and a pulling force acts on the inner surface side of the paper tube at the biting portion of the cutting blade (7). It was not possible to eliminate the occurrence of burrs on the cut end surface due to the tearing force acting. Further, when a force that bends the paper tube P into a V-shape acts on the cut-in portion of the cutting blade (7), the pinching force of the cut edge of the paper tube against the cutting blade (7) increases, and the rotation force of the paper tube increases. Increases resistance. The present invention is to clarify a paper tube cutting device that can solve the above problem.

[0010]

According to the present invention, there is provided a paper tube cutting apparatus comprising:
In a device for cutting a paper tube by pressing a cutting blade (7) against a predetermined position of the paper tube while forcibly rotating the paper tube while grasping one end of the paper tube fitted in (2), the cutting blade (7) The orbiting belts (9) and (91) are stretched and provided by a common pulley (83) so that the paper tube can be pressed on both sides of the belt.

[0011]

[Operation and Effect] The paper tube P is fitted into the core 2 and is forcibly rotated by the rotation driving device 12. The base (1) is advanced to make the cutting blade (7) bite into the cut line of the paper tube (P). At this time, the two belts (9) provided with the cutting blade (7) interposed therebetween
(91) presses the raw tube side portion P1 and the partition product portion P2 of the paper tube P with the cut line of the paper tube P interposed therebetween.

The rotation of the tube-side part P1 causes the belt 9 in pressure contact with the tube-side part P1 to run frictionally. The running of the belt (9) is performed by the other belt (91) via the pulley (83).
The belt (91) travels and the belt (9)
1) Forcibly rotate the partitioning product portion P2 of the paper tube P that is in pressure contact.

As the cutting depth of the cutting blade (7) increases, the pressure of the belts (9) and (91) against the paper tube P increases, and the amount of deflection of the belts (9) and (91) increases. (9) (9
1) The contact area between the paper tube and the paper tube increases, and the paper tube P and the belt (9)
(91) The slip can be reduced.

Further, since the cutting direction of the cutting blade (7) against the paper tube P and the pressing direction of the belts (9) and (91) are the same, at the biting portion of the cutting blade (7) shown in FIG. As in the example, a force for bending the paper tube P into a V-shape is generated, and the generation of burrs on the cut end surface due to the tearing force caused by the pulling force acting on the inner surface side of the paper tube is suppressed as much as possible. be able to.

Further, on both sides of the cutting blade (7), a belt (9)
When the paper tube P is pressed by (91), this pressing force acts so as to open the cut by the cutting blade (7), so that the cutting blade (7)
And the frictional force of the paper tube cut can be reduced.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a cutting core (2) is provided horizontally on a base (1) with one end supported. On the support side of the cutting core (2),
A rotation drive device (12) for grasping the end of the paper tube P fitted in the core (2) and forcibly rotating it is provided. In the following description, “front” means a side closer to the core (2), and “rear” means a direction away from the core (2).

A slide table (3) is provided on the upper surface of the base (1) so as to be slidable back and forth across the rails (11) and (11) in a horizontal plane perpendicular to the cutting core (2). The slide table (3) is provided with a reciprocating drive device (not shown) such as a cylinder. A cutting blade mounting base (5) is mounted on the slide base (3) via a horizontal rotating table (4), and a cutting blade (7) is mounted on the cutting blade mounting base (5).

The horizontal turntable (4) has a shaft hole (43) formed on the lower surface.
A pivot (32) projecting from the upper surface of the slide table (3) is rotatably fitted thereto. The horizontal turntable (4) is a horizontal turntable adjuster (6
According to 1), positioning in the rotation direction on the slide table (3) is performed, and the horizontal turn table adjuster (61) is moved to the slide table (3).
Bolts (63) and (63) are threaded through the wall plate (31) protruding at one end at a position equidistant from the pivot (32), and the ends of the bolts (63) and (63) are connected to the horizontal rotary table (4). ). By loosening one bolt (63) and tightening the other bolt, it is possible to position the horizontal turntable (4) in the rotational direction.

The cutting blade mount (5) is provided with a shaft hole (5
A pivot (44) protruding from the front end face of the horizontal rotating table (4) on the cutting core (2) side is rotatably fitted to 1), and a cutting blade mounting table adjusting tool is provided.
By (62), the inclination in a plane orthogonal to the rotation plane of the horizontal turntable (4) is adjusted.

The cutting blade mounting table adjuster (62) is a horizontal rotating table.
An arm (5) projecting parallel to the shaft hole (51) above the cutting blade mount (5) between two wall plates (41) (41) projecting from the upper surface of (4).
The arm (54) is pressed by the bolts (64) and (64) which are screwed through the wall plates (41) and (41). By loosening one bolt (64) and tightening the other bolt, the inclination of the cutting blade mount (5) about the pivot (44) can be adjusted. A cutting blade adjusting means (6) is provided by the cutting blade mounting table adjusting tool (62) and the horizontal rotating table adjusting tool (61).
Is configured.

A support shaft (52) protrudes from the side surface of the cutting blade mount (5) orthogonally to the shaft hole (51), and the cutting blade (7) is exchangeably fixed to the support shaft. You. A cylinder (53) protrudes from the upper surface of the cutting blade mount (5) and rotates the support shaft (52) intermittently as necessary.

A frame mounting member (85) is provided on the slide base (3).
An approximately square frame-like frame (8) is erected on the cutting blade (7) side through the intermediary of the cutting blade (7).
Is installed. The frame mounting member (85) is formed in a deformed U-shape by bending both ends of the rod in the same direction, and has elongated holes (86) and (86) in both bent portions, and a screw hole in a straight portion between the bent portions. (87) and (87) are opened, the both bent portions are brought into contact with the front and rear end surfaces of the slide base (3), and are bolted except for the adjustment allowance by the elongated hole (86).

The frame (8) is provided with shaft holes (81) at four corners, and one of the two rear shaft holes is an elongated hole (81a). This is for adjusting the tension of the belts (9) and (91) described later. An elongated hole (87) is formed in the lower rod of the frame (8) in the front-rear direction, and a bolt inserted into the elongated hole (87) is screwed into a screw (87) of the frame mounting member (85) to It is attached to the slide base (3) via the attachment member (85) so that the position can be adjusted in the front-rear and left-right directions.

A pulley (83) for attaching a belt is attached to each shaft hole (81) (81a) of the frame (8), and two belts (9) and (91) are attached.
Are stretched endlessly in parallel. Each pulley has two belts
(9) The (91) is formed in such a width that it can be hanged side by side, and the rotation support shaft (84) is inserted into the shaft hole (81) of the frame (8) and fixed by tightening the nut. Frame (8)
Are adjusted so that the front end of the cutting blade (7) comes out from between the belts (9) and (91) when the belts (9) and (91) press the paper tube P.

Then, the paper tube P is fitted into the core 2 and is forcibly rotated by the rotation driving device 12. The base (1) is advanced to make the cutting blade (7) bite into the cut line of the paper tube (P).
At this time, two belts provided with the cutting blade (7) interposed
(9) (91) presses the tube-side portion P1 and the partitioning product portion P2 of the paper tube P across the cut line of the paper tube P.

The rotation of the tube-side portion P1 causes the belt 9 in pressure contact with the tube-side portion P1 to run frictionally. The running of the belt (9) is performed by the other belt (91) via the pulley (83).
The belt (91) travels and the belt (9)
1) Forcibly rotate the partitioning product portion P2 of the paper tube P that is in pressure contact.

As the cutting depth of the cutting blade (7) increases, the pressure of the belts (9) and (91) against the paper tube P increases, and the amount of deflection of the belts (9) and (91) increases. (9) (9
1) The contact area between the paper tube and the paper tube increases, and the paper tube P and the belt (9)
(91) The slip can be reduced.

Since the cutting direction of the cutting blade (7) against the paper tube P and the pressing direction of the belts (9) and (91) are the same, at the biting portion of the cutting blade (7) shown in FIG. As in the example, a force to bend the paper tube P into a V-shape is generated, and a pulling force acts on the inner surface side of the paper tube. be able to.

On both sides of the cutting blade (7), belts (9) (9)
When the paper tube P is pressed by 1), the pressing force is
(7) Since it acts to open the cut, the frictional force between the cutting blade (7) and the cut of the paper tube can be reduced.

If the cutting blade (7) does not bite at right angles to the axis of the paper tube P, the cut end face will not be flat. In the cutting apparatus according to the embodiment, a slide table (3) whose rotational position can be adjusted in a horizontal plane by a horizontal turn table adjuster (61) is provided on a base (1), and a cutting blade is mounted on the slide table (3). A cutting blade mount (5) is provided so that the tilt can be adjusted in a vertical plane by a mount adjuster (62).
Since the cutting blade (7) is provided on the table (5), the paper core P of the cutting blade (7) is so set that the cutting blade (7) bites into the paper core P at a right angle.
The angle of approach to can be adjusted.

Frame (8) on which belts (9) and (91) are stretched
The position can be adjusted to the left and right by the margin of the long hole (86) of the frame mounting member (85).
The cutting blade (7) can be located at the center between the belts (9) and (91). The frame (8) is a long hole of the frame (8).
Since the position can be adjusted back and forth by the margin of (82), the cutting blade
It is possible to adjust the timing of the cutting into the paper tube P of (7) and the pressing of the paper tube P by the belts (9) and (91). This is because when the cutting blade (7) whose worn edge is worn is polished and reused, the pressing force of the belts (9) and (91) against the paper tube is applied to the cutting blade (7) having a smaller diameter. Timing can be set optimally.

In the above embodiment, the cutting blade (7) is not rotated during cutting, but the cylinder (53) is operated according to the wear of the cutting blade (7), and the cutting blade (7) is rotated by one pitch. , Cutting blade (7)
The cutting position is not limited to this, but the cutting blade (7) is rotatably supported and pressed against the rotating paper tube P to cut the paper tube. Can also.

In carrying out the present invention, the base (1) is provided so as to be slidable not only in the front-back direction but also in the direction along the axis of the cutting core (2), so that each time the paper tube P is cut, Needless to say, the paper tube can be sequentially cut by sliding the base (1) horizontally by one pitch.

[Brief description of the drawings]

FIG. 1 is a perspective view of a paper tube cutting device.

FIG. 2 is an exploded perspective view of the paper tube cutting device.

FIG. 3 is a side view of the paper tube cutting device.

FIG. 4 is a plan view of the paper tube cutting device.

FIG. 5 is a sectional view of a main part of a paper tube cutting device proposed by the applicant before.

FIG. 6 is a side view of a paper tube cutting device previously proposed by the applicant.

FIG. 7 is a cross-sectional view of the paper tube cutting device proposed by the applicant before cutting the paper tube.

[Explanation of symbols]

 (1) Base (2) Cutting core (3) Slide table (4) Horizontal rotating table (5) Cutting blade mount (6) Cutting blade adjusting means (7) Cutting blade (8) Frame (9) Belt (91) ) Belt

Claims (2)

(57) [Claims] A cutting blade (7) is provided at a predetermined position of the paper tube while forcibly rotating the paper tube while gripping one end of the paper tube fitted in the cutting core (2).
A cutting blade (7)
The orbiting belts (9) and (91) are stretched and provided by a common pulley (83) so as to be able to press the paper tube on both sides with the cutting blade interposed therebetween, and when the cutting blade (7) bites into the paper tube, the cutting blade (7) The belts (9) and (91) press the paper tube from the same direction as the cutting direction of the paper tube into the paper tube, and the belt (9) on the rotational drive side of the paper tube travels due to friction with the paper tube by pulleys (83). ) To the other belt (91) to transmit the forced rotation of the paper tube to the paper tube on the opposite side across the expected cutting line while cutting the paper tube. 2. A rotary driving device for rotating a core core provided on a base and a paper tube provided at one end of the core core and fitted to the core core. (12), a slide table (3) provided so as to be able to approach and separate from the cutting core (2), and a slide table (3)
A cutting blade mount (5) disposed on the cutting blade mount,
The cutting blade (7) attached to (5) and the cutting blade (7)
Cutting blade adjusting means (6) capable of finely adjusting the inclination of the cutting blade mounting table (5) so as to be orthogonal to (2), and a cutting blade (7) on a frame (8) provided on a slide table (3). A paper tube cutting device having belts (9) and (91) stretched by a common pulley (83) with the belt interposed therebetween.