JP2001150384A - Paper tube manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently and surely set intervals of plural cutting units in a paper tube cutting device. SOLUTION: In this paper tube cutting device having plural cutting units 3, 3, 3 movable along a cutting core 25, and capable of adjusting a cutting length of a paper tube by adjusting an interval between the adjacent cutting units, each cutting unit 3 is provided with a ball screw bush 41 engaged with a ball screw shaft mounted in parallel with the cutting core 25, and a servo motor 6 rotating and driving the screw bush, and the ball screw bush 41 of each cutting unit 3 is rotated in accordance with the input to a control part 100 to set an interval between circular blades 35, 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper tube manufacturing apparatus capable of cutting a paper tube into a set length while continuously forming a paper tube by spirally winding a plurality of tapes.

[0002]

2. Description of the Related Art A conventional paper tube manufacturing apparatus comprises a paper tube forming section for winding a plurality of tapes around a mandrel to form a paper tube continuously, and a paper tube forming section. And a paper tube cutting unit that is provided downstream of the paper tube forming unit and cuts the paper tube sent out from the paper tube forming unit into a predetermined size, and the paper tube cutting unit is movable along a cutting core connected to the mandrel. Has a plurality of cutting units, and can adjust the cutting length of the paper tube by adjusting the interval between adjacent cutting units. However, the spacing between the cutting units is manually adjusted, and this operation while applying a scale requires skill, is inefficient, and lacks accuracy.

An object of the present invention is to clarify a paper tube manufacturing apparatus capable of efficiently and accurately setting a spacing between cutting units and efficiently manufacturing a paper tube having a set length.

[0004]

SUMMARY OF THE INVENTION The present invention provides a paper tube forming section (1) for continuously winding a plurality of tapes around a mandrel (12) to form a paper tube, and a downstream side of the paper tube forming section (1). And a paper tube cutting unit (2) for cutting a paper tube sent out from the paper tube forming unit to a predetermined size.
It has a plurality of cutting units (3) (3) (3) movably along the cutting core (25) connected to the mandrel (12), and the gap between adjacent cutting units (3) (3) In a paper tube manufacturing apparatus in which the cutting length of the paper tube can be set by adjusting, each cutting unit
(3) has a round blade (35), a motor (36) for rotating and driving the round blade,
A ball screw bush (41) and a high-precision control motor (6) such as a servomotor for rotating the screw bush are mounted, and each cutting unit (4) is mounted on a ball screw shaft (4) arranged in parallel with the cutting core (25). 3) Screw the ball screw bush (41),
The high precision control motor (6) of each cutting unit (3) is
00), the ball screw bush (41) of the cutting unit (3) is rotated by an input to the control unit (100) to rotate the round blade.
(35) The interval of (35) can be set.

[0005] Two support plates (7) fitted to the ball screw shaft (4) with a margin between the ball screw bush (41).
(7) is fixed to the base (31) of the cutting unit (3) with bolts (71), and a high-precision control motor spans both support plates (7) and (7).
The base (62) of (6) is bolted and fixed, and the motor shaft (61) and the ball screw bush (41) of the motor are bevel gears (5) (51).
It is desirable to be configured so as to be linked via a.

[0006]

[Operation and Effect] The ball screw bush (41) of each cutting unit (3) is screwed on one ball screw shaft (4), and the ball screw of each cutting unit (3) is received by a signal from the control unit (100). By independently rotating the bush (41) by a required angle, the cutting unit (3) is moved in the screw axis direction, so that the interval between the adjacent cutting units (3) and (3), that is, the round blade (3)
5) In order to set the interval between (35), the time required for this setting does not require the skill required to move the cutting unit manually by applying a conventional scale, and is much more efficient and Be accurate.

Further, in the case of manual operation, the present invention has to move the cutting units (3) one by one with respect to the positive cutting unit to adjust the interval between adjacent cutting units. Moving the cutting units (3) that need to be moved at once by a signal from the control unit (100) also dramatically improves work efficiency in this regard. The ball screw bush (41) screwed to the ball screw shaft (4) is rotated by a high-precision control motor (6) such as a servomotor, and the cutting unit (3) is moved by the screw thrust. The cutting units (3) and (3) can be moved accurately and accurately by a distance, and the accuracy of setting the intervals between the cutting units (3) and (3) is also improved.

In addition, the high-precision control motor (6) to the bevel gear (5)
When transmitting rotation to the ball screw bush (41) via (51), the base (31) is placed in each cutting unit (3) and the ball screw bush (41) is sandwiched between the base and the ball screw shaft (4). Cutting unit (3) for two fitted support plates (7) (7)
To the base (31) with bolts (71), and both support plates (7)
The base part (62) of the high-precision control motor (6) is fixed by bolting over (7), and the motor shaft (61) and the ball screw bush (41) of the motor are connected via bevel gears (5) and (51). When the support plates (7) and (7) are bolted to the base (31), and the base part (62) of the high-precision control motor (6) is connected to the support plate (7). When bolting, the bevel gears (5) (51) are adjusted by adjusting the spacing between the support plates (7) and (7) and cutting the contact surface (70) between the base (62) and the support plate (7). The meshing can be optimized.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a paper tube manufacturing apparatus, a paper tube cutting section (2) shown in FIGS. 2 and 4 is provided downstream of a paper tube forming section (1) shown in FIGS. .

The paper tube forming section (1) has a known structure, and supports an upstream base end on a base (11), and has a mandrel (12) with its tip directed toward the paper tube cutting section (2). Floats horizontally from the base (11). A plurality of cylinders (13) (13) (13) in this embodiment are provided with the mandrel (12) interposed therebetween, and the endless winding belt (14) wound around the mandrel (12) is attached to the mandrel (12). It extends over the cylinders (13) (13) on both sides of (12).
A plurality of paper tapes (not shown) with an adhesive are supplied to the mandrel (12) from an oblique side, and are wound spirally on the mandrel (12) with a winding belt (14) and sent out downstream. To form a paper tube.

The paper tube cutting section (2) shown in FIGS. 2 and 4 includes a cutting core (25) connected to the mandrel (12) of the paper tube forming section (1) in a straight line with the mandrel, and the cutting core (25). Cut core (2) below core (25)
A paper tube guide device (22) arranged along 5) and a plurality of cutting units arranged so as to be able to adjust the interval along the cutting core (25).
(3) (3) (3).

The paper tube guide device (22) is provided with a row of rollers for placing a paper tube fitted on a core (25) on an endless chain (23) orbiting in a vertical plane. The (24) is arranged so that the axis is parallel to the cutting core (25), and two sets of two are arranged along the cutting core (25). The chain (23) is rotated by the rotary driving device (20) at the production speed of the paper tube,
It orbits at a speed that matches the speed of the paper tube moving from (12) to the core (25).

A long bracket (8) is provided beside the cutting core (25) so as to be movable in parallel with the cutting core (25). The bracket (8) is provided with a window hole (81) in the longitudinal direction.
Rails (82) and (82) protrude from above and below, and both ends of a ball screw shaft (4) provided in parallel with the cutting core (25) are fixed at both ends of the bracket (8).

As shown in FIGS. 5 and 6, a ball screw shaft (4)
A plurality of cutting units (3) are independently provided movably on the ball screw shaft (4). Each cutting unit
(3) a circular blade (35) on a base (31), a cylinder device (33) for raising and lowering the circular blade (35), and a motor for rotating and driving the circular blade (35).
(36) A ball screw bush (41) screwed into the ball screw shaft (4), and a high precision control motor (6) for rotating the ball screw bush (41).

The base (31) of the cutting unit (3) is a horizontal plate.
(31a) and a vertical plate (31b) are formed in an inverted L-shape, and engage with rails (82) (82) provided in parallel with the bracket (8) to engage the bracket (8) and the core (25). You can slide between them. The block (3) can be moved up and down on the vertical plate (31b) of the base (31).
2) is provided, and a round blade (35) is rotatably provided on the lifting block (32) in a plane orthogonal to the cutting core (25). Base (31)
The piston rod (34) of the cylinder device (33) mounted on the horizontal plate (31a) is connected to the lifting block (32). Base (3
In 1), a round blade (35) rotation driving motor (36) is provided.

Two support plates 7 are fixed to the back surface of the vertical plate 31b of the base 31 by bolts 71 inserted from the front side of the vertical plate 31b. The support plates (7) and (7) penetrate through the window (81) of the bracket (8) and have their tips inclined obliquely upward. A ball screw bush (41) is provided between the support plates (7) and (7), and the ball screw bush (41) is screwed to the ball screw shaft (4). A thrust bearing (72) is provided between both ends of the ball screw bush (41) and the support plates (7) (7).
(72) is interposed.

As shown in FIGS. 5 and 7, a high-precision control motor (6) such as a servomotor extends between the front ends of the support plates (7) and (7).
The base (62) is bolted, and the motor shaft (61) and the ball screw bush (41) are connected via two large and small bevel gears (5) and (51). The bevel gear (5) is a ball screw bush (4
The bevel gear (51) is fixed to the front end of the motor shaft (61) by screwing to the flange (42) of 1), and meshes with each other.

Each of the cutting units (3), (3), (3) is connected to a control unit (100), and the adjacent cutting units (3)
By inputting the set interval between (3) to the control unit (100), the high-precision control motor (6) rotates the ball screw bush (41) by an angle corresponding to the signal from the control unit (100) and cuts it. The interval between the units (3) and (3) is maintained at the set interval.

As shown in FIG. 4, the bracket (8)
While being connected to the cutting unit simultaneous moving device (9) and the round blade (35) is cutting the paper tube, all the cutting units (3) correspond to the moving speed of the paper tube on the core (25). ) Is moved to the downstream side, and once one cutting is completed, the cutting units (3) and (3) are instantaneously returned to the original position without changing the interval between them.

However, the core (25) is cut from the mandrel (12) by the twisting force of the winding belt (14) formed in the paper tube forming section (1).
Cutting unit for the paper tube fed while rotating to
The round blade (35) of (3) moves in the moving direction of the paper tube while biting all together by the operation of the cylinder device (33). Round blade (35)
When the core reaches the cutting core (25), the cylinder device (33) works in the opposite direction due to electrical detection as is well known, the round blade (35) separates from the paper tube, and the cutting unit simultaneous moving device (9) The cutting units (3), (3) and (3) instantly return to their original positions. The above operation is repeated according to the feed speed of the paper tube, so that the paper tube cut to the set length can be efficiently manufactured.

According to the present invention, as described above, the ball screw bush of each cutting unit (3) is mounted on one ball screw shaft (4).
(41) is screwed, and the ball screw bush (41) of each cutting unit (3) is independently rotated by a required angle by a signal from the control unit (100). To set the distance between adjacent cutting units (3) and (3), that is, the distance between the round blades (35) and (35). Skill such as moving the cutting unit is not required, and is much more efficient and accurate.

Furthermore, in the case of manual operation, the present invention requires moving the cutting unit (3) one by one with respect to the positive cutting unit to adjust the interval between adjacent cutting units. Moving the cutting units (3) that need to be moved at once by a signal from the control unit (100) also dramatically improves work efficiency in this regard. The ball screw bush (41) screwed to the ball screw shaft (4) is rotated by a high-precision control motor (6) such as a servomotor, and the cutting unit (3) is moved by the screw thrust. The cutting units (3) and (3) can be moved accurately and accurately by a distance, and the accuracy of setting the intervals between the cutting units (3) and (3) is also improved.

Also, the high-precision control motor (6) to the bevel gear (5)
When transmitting rotation to the ball screw bush (41) via (51), the base (31) is placed in each cutting unit (3) and the ball screw bush (41) is sandwiched between the base and the ball screw shaft (4). Cutting unit (3) for two fitted support plates (7) (7)
To the base (31) with bolts (71), and both support plates (7)
The base part (62) of the high-precision control motor (6) is fixed by bolting over (7), and the motor shaft (61) and the ball screw bush (41) of the motor are connected via bevel gears (5) and (51). When the support plates (7) and (7) are bolted to the base (31), and the base part (62) of the high-precision control motor (6) is connected to the support plate (7). When bolting, the bevel gears (5) (51) are adjusted by adjusting the spacing between the support plates (7) and (7) and cutting the contact surface (70) between the base (62) and the support plate (7). The meshing can be optimized.

In the embodiment of the present invention, the cutting unit simultaneous moving device (9) can be omitted. In this case, round blade
While (35) bites into the core, the ball screw bush (4
Rotate 1) to make the round blade (35) follow the moving speed of the paper core,
Whenever one cut is completed, the ball screw bush (41) is reversed to return the cutting unit (3) to the original position. Ball screw bush by high precision control motor (6)
This is a technique that can be achieved by rotating (41).

The present invention is not limited to the configuration of the above embodiment, and various modifications can be made within the scope of the claims.

[Brief description of the drawings]

FIG. 1 is a front view of a paper tube forming unit.

FIG. 2 is a front view of a paper tube cutting unit.

FIG. 3 is a plan view of a paper tube forming unit.

FIG. 4 is a plan view of a paper tube cutting unit.

FIG. 5 is a perspective view of a cutting unit.

FIG. 6 is a side view of the cutting unit with a part broken.

FIG. 7 is a sectional view of a cutting unit.

[Explanation of symbols]

 (1) Paper core forming part (2) Paper core cutting part (25) Cutting core (3) Cutting unit (35) Round blade (4) Ball screw shaft (41) Ball screw bush (5) Bevel gear (51) Bevel gear ( 6) High precision control motor (7) Support plate (71) Bolt (8) Bracket

Claims (2)

[Claims] 1. A paper tube forming section (1) for continuously winding a plurality of tapes around a mandrel (12) to form a paper tube, and a paper tube provided downstream of the paper tube forming section (1). And a paper tube cutting unit (2) for cutting the paper tube sent from the forming unit into a predetermined size. The paper tube cutting unit (2) is provided with the mandrel (12).
A plurality of cutting units (3) (3) (3) movably along a cutting core (25) connected to the cutting unit (3), and adjacent cutting units (3)
In the paper tube manufacturing apparatus which can set the cutting length of the paper tube by adjusting the interval of (3), each cutting unit (3) has a round blade (35),
Motor (36) for rotating and driving the round blade, ball screw bush
(41) and a high-precision control motor (6) such as a servomotor for driving the screw bush to rotate, and each cutting unit (3) is mounted on a ball screw shaft (4) arranged in parallel with the cutting core (25). Screwing the ball screw bush (41) of each
The high-precision control motor (6) is connected to the control unit (100), and the input to the control unit (100) rotates the ball screw bush (41) of the cutting unit (3) to rotate the round blades (35) (35). Paper core manufacturing equipment that can set the interval of). 2. Two support plates fitted in a state where the ball screw shaft (4) has a margin with the ball screw bush (41) interposed therebetween.
(7) Use the bolt (71) to attach (7) to the base (3) of the cutting unit (3).
1), and the base part (62) of the high-precision control motor (6) is fixed by bolting over both support plates (7) (7), and the motor shaft (61) of the motor and the ball screw bush (41) are fixed. ) Is bevel gear (5) (5
1), and when the support plates (7) and (7) are bolted to the base (31), and the base part (62) of the high-precision control motor (6) is connected to the support plate. When bolting to (7), the bevel gear (5) is adjusted by adjusting the spacing between the support plates (7) and (7) and cutting the contact surface (70) between the base portion (62) and the support plate (7). (Five
The paper tube manufacturing apparatus according to claim 1, wherein the meshing of (1) can be optimized.