JPH08290389A - Method and device for cutting cylindrical work into round slices - Google Patents

Abstract

PURPOSE: To achieve the smooth cutting by sufficiently preventing the generation of paper powder, the ruggedness of the cut section, the breakage of a core when a cylindrical work to be cut is inserted on an expandable rotary shaft, the work is set to the rotary shaft by the expansion of the rotary shaft, and the work is rotated and cut into round slices while a blade is pressed against the work. CONSTITUTION: A protective sleeve 4 for a blade 8 is inserted in a rotary shaft 1, the sleeve 4 is expanded by the expansion of the rotary shaft 1, a work 5 to be cut is set to the rotary shaft 1 with the sleeve 4 as an interposed stuff, and one end of the work 5 is connected to the rotary shaft 1 by a chuck 6, etc., and then, cut.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for slicing a cylindrical object to be cut, for example, a roll-shaped object in which a sheet is wound around a winding core, and a slicing cutting device used for the slicing. It is a thing.

[0002]

2. Description of the Related Art When a cylindrical object to be cut is so-called sliced, for example, a roll-shaped product (hereinafter referred to as a log roll) in which a sheet is wound around a winding core is sliced into a tape. When creating a wound body, insert a cylindrical object to be cut on the swellable rotary shaft, and fix the core to the rotary shaft by bulging the rotary shaft from the inner surface side, A method of rotating an object to be cut while pressing a blade against it and cutting it into rings is known (for example, Japanese Patent Laid-Open No. 6-182695).

[0003]

However, when the core is fixed by bulging the rotary shaft from the inner surface side, the blade cuts the core when the rotary shaft bulges and contacts the entire inner surface of the core. If the blade tip comes into contact with the shaft surface when it is cut off and the blade tip is inevitable, on the other hand, if the pressing of the blade tool is stopped just before the blade edge comes into contact with the rotating shaft (the cutting tool travel control is performed by the limit switch etc.) However, uncut parts are unavoidable, and in any case, it is difficult to cut the core properly (cleanly).

For this reason, it is conceivable to fix the core by bulging the rotary shaft so as to maintain a space just below the inner peripheral surface of the core position where the core is cut by a blade, and in this case as well. Becomes flat due to the pressing force of the blade, or it becomes difficult to maintain concentricity between the center of the winding core and the center of the rotation axis (eccentricity occurs), or the state of support of the core cutting point against the pressing force of the blade is unsatisfactory. Stable (for example, the core cutting point escapes to the above space, making it difficult to apply sufficient cutting force)
It is difficult to expect a clean cut from the standpoint of etc.

An object of the present invention is to insert a tubular object to be cut into a swellable rotary shaft, set the target object on the rotary shaft by the swelling of the rotary shaft, and press the blade against the cut object. In the case of rotating an object to be cut while cutting it into rings, it is an object of the present invention to provide a method and a cutting device for cutting a cylindrical object, which can dramatically improve so-called sharpness and workability.

[0006]

According to the method of cutting a tubular object in a sliced manner according to the present invention, a tubular object to be cut is inserted on a swellable rotary shaft, and the object to be cut is bulged by the rotary shaft. In the method of setting the rotary shaft, rotating the cut object while pressing the cut object against the cut object, and cutting the cut object, the protective sleeve for the cut tool is inserted through the rotary shaft, and the sleeve is swelled by the expansion of the rotary shaft. Is inflated, the object to be cut is set on the rotary shaft with the sleeve as an intervening object, one end of the object to be cut is bonded to the rotary shaft, and then the cutting is performed. . (EN) A tubular object shredder cutting device according to the present invention, wherein a rotating shaft through which a tubular object to be cut is inserted, a swelling means capable of being pressure-contacted with and detached from an inner surface of the inserted object to be cut, and an inserted object to be cut. A chuck means for one end of the cut object is provided.

The structure of the present invention will be described in detail below with reference to the drawings. FIG. 1 (a) is an explanatory view showing a tubular object slice cutting device according to the present invention, and a log roll is also shown, but in a state before being fixed. (B) in FIG.
It is a sectional view taken along line (a) of FIG. In FIG. 1A and FIG. 1B, 1 is a cantilever type rotating shaft, which is supported by a bearing 2. The rotary shaft 1 is provided with a lug member 11 which can be retracted at a predetermined interval in the axial direction and at substantially equidistant positions in the circumferential direction as shown in FIG. As the retracting mechanism of the lug member 11, air pressure and hydraulic pressure are applied against the reaction force of the return spring.
A mechanism for retracting the lug member 11 can be used. 12 is an air or hydraulic inlet. Reference numeral 31 is an electric motor, 32 is a speed reducer, and 33 and 34 are belts and gears for transmitting the rotation of the electric motor 31 to the rotating shaft 1.

Reference numeral 4 denotes a protective sleeve which is inserted on the rotary shaft 1 and is made of a material which can be elastically expanded and reduced in diameter and which has a small cutting resistance against a cutting tool. Elastic plastics are preferably used. Reference numeral 5 denotes a log roller inserted through the rotary shaft 1, and a roll core 51 made of paper or plastic and wound with an adhesive paper sheet or a plastic film can be used.
Reference numeral 6 is a chuck attached to the rotary shaft 1 for holding one end (protruding end portion of the winding core 51) of the log roll 5.
Reference numeral 7 denotes a movable bearing which can be moved backward and forward with respect to the other end of the rotary shaft 1. Reference numeral 8 denotes a blade, which is attached to the traverse mount so as to be movable up and down (X direction) and left and right (axial direction of log roll, Y direction), but the traverse mount is not shown. ing.

In order to cut the log roll 5 by the ring cutting method according to the present invention, first, the movable bearing 7 is retracted (moved in the Y direction) in FIG. The protective sleeve 4 is inflated by inserting the log roller 5 on the upper side and projecting the lug member 11 to inflate the protective sleeve 4.
The log roll 5 is set on the shaft 1 by pressing the sleeve 4 against the inner surface of the winding core 51 of the log roll 5. Further, by operating the chuck 6, one end of the log roll 5 and the shaft 1 are bound.

Then, the electric motor 31 is driven to rotate the shaft 1, and the blade is pressed against the log roll 5 under the rotation of the log roll 5 to cut the log roll 5. The fact that the tip of the blade 8 has cut the winding core 51 is detected, for example, from the amount of movement of the blade in the X direction, the rotation of the rotary shaft 1 is stopped, and the blade 8 is moved to -X.
And move in the direction to complete one cutting. For subsequent cutting, the blade 8 is moved in the -Y direction by a predetermined distance and the above series of steps are repeated.

After finishing all the round cutting of the log roll 5,
After stopping the rotation of the rotary shaft 1 and removing the blade 8 from the log roller 5, the lug member 11 of the rotary shaft 1 is immersed,
The chuck 6 is released to release the connection between the cut object and the rotary shaft 1, the movable bearing 7 is retracted, and the cut object is removed from the rotary shaft 1.
Pull out from. The object to be cut according to the present invention is not limited to the above-mentioned log roll, and can be any so-called tubular object which is a target object by so-called slice cutting. The swelling structure of the rotary shaft used in the wheel-cutting device according to the present invention is one in which a protective sleeve is expanded and a tubular object to be cut can be set on the rotary shaft with the protective sleeve interposed. Any structure may be used as long as it is air pressure, hydraulic pressure, or a segment structure capable of expanding / contracting by inserting / removing the core.

[0012]

[Operation] Since the core can be cut in a state where the inner surface of the core of the log roll and the outer surface of the protective sleeve are completely in contact with each other without a gap,
The core can be maintained in a perfect circle even under the action of the pressing force of the blade, the concentricity of the center of the core and the center of the rotation axis can be maintained, and the support state of the core cutting point against the pressing force of the blade is stable. , The blade cuts the core completely and the blade tip is a protective sleeve.
Even if it contacts the blade, the cutting edge can be safely held without any damage.

Even if the rotation force Mt acting on the log roll 5 becomes large due to the cutting resistance of the log roll 5 being hard, the chuck 6 will connect the one end of the log roll to the rotary shaft. It is possible to guarantee the stable retention of the log roll. That is, assuming that there is no connection between one end of the log roll and the rotary shaft by the chuck 6, the entire rotary moment Mt acts on the protective sleeve 4 between the log roll 5 and the rotary shaft 1. As a result, a shear strain (torsion strain) θ is generated in the soft protective sleeve 4, and in this case, the protective sleeve is protected against the deflection of the rotary moment Mt due to the deflection of the cutting resistance.
As a result of the shear strain amount (amount of change in the circumferential direction) of the sleeve 4, the position (rotation angle position) of the log roll 5 is displaced according to the displacement of the shear strain of the protective sleeve 4, and the log roll 5 is displaced. A deviation Δβ occurs in the relative positional relationship between the blade and the blade 8. Therefore, in the present invention, one end of the log roll 5 is attached to the rotary shaft 1 by the chuck 6, and a part of the rotary moment Mt is located between the blade position and the chuck position. Of the rotary moment, which is supported by the roll portion (particularly the core portion between the blade position and the chuck position) and acts on the protective sleeve, and as a result, is based on the deflection of the rotary moment. Since the shake of the shear strain amount θ of the protective sleeve 4 is reduced and the shake Δβ of the relative positional relationship between the log roll 5 and the blade 8 is reduced,
The blurring of the blade 8 due to the blurring of the rotating moment is suppressed as much. Therefore, by the synergistic effect of the above, generation of paper powder, roughening of the cut surface, breakage of the core, etc. can be eliminated to ensure excellent sharpness and smooth cutting can be achieved.

[0014]

【Example】

[Example] An object to be cut has an outer diameter of 80.5 mmφ and a thickness of 2
A log roll obtained by winding a paper adhesive sheet on an mm paper tube with an outer diameter of 125 mmφ was used. An air shaft [Air shaft made by Mitsuhashi Seisakusho Co., Ltd.] that projects a lug member by air pressure is used as a rotatable shaft, and a protective rubber sleeve has an outer diameter of 75 mmφ and a thickness of 5 mm urethane rubber sleeve. This urethane rubber sleeve was inserted through the air shaft, and the lug member of the air shaft was projected at an air pressure of 5 kgf / cm ² to fix the log roll. Furthermore, the paper tube projecting portion at one end of the log roll was bound to the rotary shaft by tightening with a chuck, and the other end of the rotary shaft was supported by a movable bearing. Then, drive the electric motor to rotate the log wheel at a rotation speed of about 900.
The blade was rotated at a speed of 20 / min, the blade was moved in the X direction at a feed rate of 20 mm / sec, and the blade was moved in the -Y direction for each cutting, thereby cutting about 1000 turns. During these cuttings, virtually no generation of paper powder and roughness of the cut surface were observed, and the core was not broken at all.

[Comparative Example] The same as Example, except that the chuck was released and the one end of the log roll was not bonded to the rotary shaft. Generation of paper dust, rough cut surface,
Alternatively, the breakage of the paper tube was remarkable, and defective products were generated approximately once every 10 times.

[0016]

According to the present invention, a tubular object to be cut such as a log roll can be smoothly sliced while sufficiently preventing the generation of paper dust, the roughening of the cut surface, the breakage of the core, and the like. . Further, since the shaft can be expanded or reduced in diameter, it is possible to easily insert the tubular cut object into the shaft and remove the cut product from the shaft. Therefore, while using the protective sleeve as a spacer to prevent contact with the rotary shaft of the blade, it is possible to prevent the occurrence of defective products well, and to obtain a product with a clean cut surface with good workability. You can

[Brief description of drawings]

FIG. 1A is an explanatory view showing a device for cutting a tubular object into slices according to the present invention, and FIG. 1B is a cross-sectional view taken along line A-B in FIG.

[Explanation of reference numerals] 1 rotary shaft 11 lug member 4 protective sleeve 5 tubular object to be cut 51 core 6 chuck 8 knife

Claims (2)

[Claims] 1. A tubular object to be cut is inserted on a swivel shaft capable of bulging, the object to be cut is set on the rotary shaft by swelling of the shaft, and the object to be cut is pressed against the object to be cut. In the method of rotating and cutting into pieces, a protective sleeve for the blade is inserted through the rotary shaft, the sleeve is expanded by the bulging of the rotary shaft, and the sleeve is cut into the rotary shaft with the sleeve as an inclusion. Set the object, bind one end of the object to be cut to the rotating shaft,
After that, a method for cutting a cylindrical object into slices is characterized by performing cutting. 2. A swelling means capable of press-contacting with and disengaging from an inner surface of the inserted cutting object, and a chuck means for one end of the inserted cutting object, to a rotary shaft through which the cylindrical cutting object is inserted. A device for cutting a cylindrical object into pieces, which is provided.