JPH09165022A - Device for cutting end-face of packed roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut off the end-face-packing material of a packed roll surely and speedily. SOLUTION: An end-face-cutting device cuts a packing material circumferentially by inserting a second cutter 12 inside the end-face-packing material 2 of a packed roll 1 held rotatably, and by rotating the packed roll 1 in the direction of the arrow D. In this case, freely rotatable rollers 31A and 31B are arranged upstream and downstream in the vicinity of the second cutter 12, the end-face-packing material 2 is held by being pressed to the end face of a roll of paper in it by means of the rollers 31A and 31B, and, when the packed roll 1 is rotated, the end-face-packing material 2 is rotated together, thereby keeping the packing material, which is to be cut with the second cutter 12, taut, enabling secure cutting and also preventing the cut packing material from clinging to the cutter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing roll formed by packing a roll-shaped material, and a circumferential portion (hereinafter referred to as a circumferential packing material) adjacent to an end surface portion (hereinafter referred to as an end surface packing material) of the packing material. The present invention relates to an end face cutting device of a packing roll for cutting an end face packing material into a disc shape. Here, the roll-shaped material is a roll paper mainly used in a rotary printing machine, but it is also a roll-shaped material made of a material such as plastic, paper, metal, wood, or a composite of these materials. May be. The packaging materials include various packaging materials such as kraft paper, paperboard, and plastic sheets.

[0002]

2. Description of the Related Art Roll paper used in a rotary printing press has its peripheral surface and side end surfaces covered with packaging materials such as kraft paper, paperboard, and vinyl chloride resin sheet.
The packing material on both end surfaces is first removed, and then the packing material on the peripheral surface is removed. As a conventional device for removing the packing material on both side end faces, a device developed by the present applicant and applied for a patent (see Japanese Patent Laid-Open No. 5-245793) is known.

As shown in FIG. 5, the apparatus described in this publication is a state in which a first cutter 11 and a second cutter 12 are pressed against an end surface packing material 2 of a packing roll 1 placed on a support roller 7. The packing roll is rotated in the direction of arrow C, the end face packing material 2 is cut by this first cutting tool 11, and the first cutting tool 11 and the second cutting tool 12 are inserted between the end surface packing material 2 and the end surface of the roll paper inside. After that, by reversing the rotation direction of the packing roll 1 and rotating it in the direction of arrow D, the second blade 12
Then, the portion of the peripheral packing material 4 adjacent to the end packing material 2 is circumferentially cut to separate the end packing material 2 into a disc shape. Here, a serrated blade is used as the blade 11a of the first blade 11, and a blade 12a of the second blade 12 is used.
As for, a straight blade with good sharpness was used.

[0004]

However, such a conventional configuration has the following problems when the peripheral surface packing material in the vicinity of the end surface packing material is cut using the second cutter 12. There was found. That is, when the peripheral packing material is cut by the second knife 12 to separate the end surface packing material, if the end surface packing material is soft like kraft paper, the separated end surface packing material immediately bends and sags. The wrinkles may disturb the posture and cause the first blade 11 and the second blade 12 to be entangled with each other, resulting in defective cutting.
In addition, even when the sharpness of the second blade 12 becomes poor, or when the peripheral packing material is soft and difficult to cut, the peripheral packing material and the end surface packing material become crumpled without getting cut and cling to the blade. In some cases, poor cutting was caused.
When such a cutting failure occurs, the packing roll 1 continues to rotate even if the packing material is not cut,
The packing material that cannot be cut is clogged between the blade and the end surface of the packing roll, and is pressed by a considerable force so that the cutting tool does not move and the packing roll cannot be fed out.
In that case, the operator manually removes the packing material entangled with the blade, but the operation of removing the packing material that is tightly entangled is extremely troublesome, and a heavy work load is imposed.

The present invention has been made in view of the above problems, and the peripheral packing material in the vicinity of the end surface packing material of a packing roll for packing a roll-shaped material such as roll paper is satisfactorily cut to obtain an end surface packing material. It is an object of the present invention to provide an end face cutting device for a packaging roll capable of reliably and promptly separating.

[0006]

In order to solve the above problems, the present invention is provided with a holding means for holding the end face packing material in the vicinity of being cut by a blade against the end face of the roll-like object inside thereof. Is. Since this holding means presses the end surface packaging material against the end surface of the roll-shaped material in the vicinity of the cutting position of the peripheral surface packaging material, even if the end surface packaging material is soft, the end surface packaging material does not bend and stick to the blade, and Since the end surface packing material rotates together with the packing roll, pull the packing material at the part that is cut even if the blade is not sharp,
Allows reliable cutting. Thus, the end surface packaging material can be reliably cut off without causing cutting failure.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The invention of claim 1 of the present application uses a blade inserted between the end face packing material and the end face of the roll-shaped product inside while rotating the packing roll around the central axis.
In the end face cutting device of the packing roll that cuts the portion adjacent to the end face packing material of the peripheral packing material in the circumferential direction, in the vicinity of the blade being cut, the end face packing material of the packing roll is the end face of the roll-shaped object inside. It is characterized in that it is provided with a holding means for pressing and holding it.

By providing the holding means, the end surface packing material near the cutting position by the blade is pressed against the end surface of the inner roll-like object and rotates together, so that the cut part of the end surface packing material is cut off by the blade tool. Without getting entangled,
Also, since there is no slack in the part cut with the blade,
Good cuts are made.

Here, the holding means is arbitrary as long as it can press the end surface packaging material against the end surface of the roll-shaped material inside thereof and rotate it together with the roll-shaped material, but at least from the cutting tool being cut. It is preferable that the roller has a roller that is pressed against the end surface packing material at the downstream position to rotate. In this configuration, by rotating the roller, the end surface packaging material can be pressed against the end surface of the roll-shaped material inside thereof, and can be reliably rotated together with the roll-shaped material, and its position is the downstream of the blade. As a result, the separated end surface packaging material can be held, the entanglement with the blade can be efficiently prevented, and the portion of the packaging material to be cut by the blade can be held in a pulled state, which enables reliable cutting. As a means for rotating the roller, the roller may be rotatably provided and configured to rotate following the rotation of the end surface of the packing roll, or a rotation driving means may be connected to the roller and the roller is pushed. It is also possible to adopt a configuration in which forced rotation is performed in synchronization with the speed of the applied portion.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention shown in the drawings will be described below. FIG. 1 is a schematic front view of an end face cutting device for a packing roll according to an embodiment of the present invention. Reference numeral 1 is a packing roll from which a packing material should be removed. In this embodiment, roll paper is wrapped with the packing material. Is. 2 is an end surface packing material of the packing roll, and 4 is a peripheral surface packing material. Reference numeral 6 denotes a packing roll supporting / rotating device that supports the packing roll 1 and rotationally drives the packing roll 1 in both forward and backward directions around the central axis.
It has a supporting roller 7 for supporting the motor, a motor 8 for rotating the supporting roller 7, and the like. The motor 8 is capable of rotating in the forward and reverse directions, and drives the packing roll 1 at a low speed in the direction indicated by the arrow C (for example, 20 to 40 mm / s at the peripheral speed) and at a high speed in the opposite arrow D direction. (For example, at a peripheral speed of 200 to 400
It can be driven at mm / s).

The packing material cutting tool 10 is located at both ends of the packing roll 1 held by the roll supporting and rotating device 6.
Is provided. As shown in an enlarged scale in FIG. 2, the packing material cutting tool 10 includes a first blade 11 having a serrated blade 11a, a second blade 12 having a straight blade 12a,
It has a blade support device 14 supporting the first blade 11 and the second blade 12 and the like. A saw blade may be generally used as the first blade 11, but other than that, for example, one having a file-shaped blade may be used. The second knife 12 may be any tool having a straight, sharp blade.

The blade supporting device 14 connects the first supporting plate 15 for mounting the first blade 11, the second supporting plate 16 for mounting the second blade 12, and the first supporting plate 15 and the second supporting plate 16 to each other. It has a hinge 17 and a spring 18 which constitutes a rotational force applying means. This hinge 17 has serrated blades 11a and straight blades 1a of the first blade 11 and the second blade 12 holding the first support plate 15 and the second support plate 16, respectively.
2a become substantially parallel, and the second knife 12 is the first knife 1
1 is connected so as to be rotatable about an axis parallel to the blades 11a and 12a. First knife 11
And the second blade 12 includes the first support plate 15 and the second support plate 16
In the state in which and form about 180 degrees with respect to the central axis of the hinge 17 (state shown in FIG. 2), the serrated blade 11a
And the straight blade 12a are attached so as to face each other. Further, as shown in FIG. 3 (a), when the side surface of the first cutting tool 11 is pressed against the end surface of the packing roll 1, the second cutting tool 12 is small with its blade 12 a in contact with the end surface of the packing roll 1. Angle α (for example, about 1 to 10 degrees)
It is arranged to be inclined only. The spring 18 is attached so as to apply a rotational force in the direction (arrow E direction) for pressing the second blade 12 against the end surface of the packing roll 1. With this configuration, even if the end surface of the packing roll 1 is somewhat uneven, the processing accuracy of the first support plate 15, the second support plate 16, the first blade 11, the second blade 12, etc., the mounting position accuracy, etc. are somewhat poor. Also, the serrated blade 11a and the straight blade 12a can be reliably pressed against the end surface of the packing roll.

In FIG. 2, the blade support device 14 has a base plate 20 and a linear stage 21 fixed to the base plate 20, and the first support plate 15 is movably held by the linear stage 21. ing. Further, a swing actuator 22 for reciprocating the first support 15 is connected to the rear end of the first support plate 15. With this configuration, the first blade 11 and the second blade 12 can reciprocate in the blade direction (arrow F direction), and therefore the swing actuator 22 reciprocates the first blade and the second blade in the blade direction. A drive device for moving is constructed. Here, as the swing actuator 22, a swing actuator having a variable swing speed is used.

In FIG. 2, reference numeral 24 is a blade supporting device 1 for pressing the first and second blades against the end surface of the packing roll.
It is a tool pressing device for supporting and moving the tool 4. The blade pressing device 24 includes a first base plate 25, a linear stage 26 fixed to the first base plate 25, a second base plate 27 movably held in the direction of arrow G, and air for reciprocating the second base plate 27. It has a cylinder 28 etc.,
The base plate 20 of the blade support device 14 is fixed to the second base plate 27. Movement direction of the second base plate 27 (arrow G
(Direction) is defined as a direction parallel to the axis of the packing roll 1. With this configuration, when the second base plate 27 is pushed forward by the air cylinder 28, the first blade 11 and the second blade 12 can be pressed against the end surface of the packing roll 1.
The first base plate 25 is held by a drive device (not shown) that moves the first base plate 25 in a direction parallel to the axis of the packing roll 1 (direction of arrow G), and the position corresponding to the length of the packing roll 1. It can be moved to.

The tool supporting device 14 is a tool pressing device 24.
Is attached to the second base plate 27, the mounting position is determined so that the side surface of the first cutter 11 is parallel to the end surface of the packing roll 1, and as shown in FIG.
The side surface of the first cutting tool 11 can be pressed against the end surface of the packing roll 1. Note that the first blade 11 may be slightly inclined so that only the vicinity of the serrated blade 11a contacts the end surface of the packing roll 1. As shown in FIG. 1, the first blade 11 and the second blade 12 are attached to the end surface of the packing roll with a serrated edge 11 of the first blade 11.
a forms an obtuse angle with the outer circumference of the end surface of the packing roll, that is, the angle β forms an obtuse angle, and the straight blade 12a of the second cutter 12 forms an acute angle with the outer circumference of the end surface of the packing roll. So that the angle γ forms an acute angle. Here, the value of the angle β is preferably about 130 to 150 degrees.

In FIGS. 1 and 2, 30A and 30B are
In the vicinity of the cutting tool (second cutting tool 12) being cut, the packing roll 1
Holding means for pressing and holding the end surface packing material 2 against the end surface of the roll paper inside, and rollers 31A and 31B that rotate while pressing the end surface packing material 2 against the end surface of the roll paper, respectively.
A moving mechanism 32B (only the holding means 30B is shown) is provided for moving the rollers 31A and 31B to a position in contact with the end surface of the packing roll 1 and a position away from the end face. The moving mechanism 32B includes a guide 34 extending in a direction parallel to the axis of the packing roll 1, a moving base 35 movably held by the guide 34, an air cylinder 36 for reciprocating the moving base 35, and the like. A roller 31B is rotatably attached to the moving table 35. Here, the mounting direction of the roller 31B is such that the rotation axis of the roller 31B is parallel to the end surface of the packing roll 1 mounted on the support roller 7 and when the packing roll 1 having a diameter frequently used is mounted on the support roller 7. It is set to be a radial direction with respect to the central axis of the packing roll 1. Thus, when the roller 31B is pressed against the end surface of the packing roll 1 by the air cylinder 36 and the packing roll 1 is rotated in that state, the roller 31B can be smoothly rotated by the rotation of the packing roll 1.

The holding means 30A provided with the rollers 31A has the same structure as the holding means 30B provided with the rollers 31B.
These holding means 30A and 30B are provided for the respective rollers 3
1A and 31B are arranged so as to be located upstream and downstream of the second cutting tool 12 being cut. In addition, roller 31
Instead of having A and 31B held on separate moving bases 35 and reciprocating by independent air cylinders 36, two rollers 31A and 31B are held on a common moving base and reciprocate together. It may be configured.
However, in that case, each of the rollers 31A and 31B can be moved with respect to a common moving base so as to reliably follow the unevenness of the end surface when the end surface of the packing roll 1 is contacted and rotated. It is preferable that the moving table is used as a reference to press against the end surface of the packing roll 1 using a spring or the like.

Next, the operation of the packing roll end face cutting device having the above construction will be described. Note that the following operation is automatically performed by a sequence control device (not shown), but the present invention is not limited to this case, and some or all may be configured to be performed manually. .

First, in FIG. 4A, the packing roll 1 from which the packing material is to be removed is placed on the support roller 7 of the packing roll supporting and rotating device 6. At this time, the blade pressing device 2
4, the first blade 11 and the second blade 12 are retracted to a position where they do not interfere with the end surface of the packing roll 1. Further, the rollers 31A and 31B are also retracted to a position where they do not interfere with the end surface of the packing roll 1.

Next, referring to FIG. 2, the blade pressing device 2
The air cylinder 28 of No. 4 operates to advance the blade support device 14 to move the first blade 11 and the second blade 12 to the packing roll 1.
It is pressed against the end face packing material 2. At this time, as described above, the second blade 12 is rotatable with respect to the first blade 11 and is given a rotational force in the arrow E direction (see FIG. 3A) by the spring 18, Both the first blade 11 and the second blade 12 are surely pressed against the end surface packing material 2.
At the same time, the air cylinders 36 of the holding means 30A and 30B are activated to press the rollers 31A and 31B against the end surface of the packing roll 1 (that is, the end surface packing material 2).

Next, as shown in FIG. 4 (b), the swing actuator 22 of the tool support device 14 is actuated to reciprocate the first tool 11 in the direction of arrow F at a high speed, and at the same time the motor 8 is moved.
(See FIG. 1) operates to rotate the packing roll 1 in the direction of arrow C at a low speed. As a result, the notched blade 11a of the first knife 11 rubs the end surface packing material 2 at high speed, tears the end surface packing material 2, and, as shown in FIGS. 3 (b) and 4 (c), It enters between the inside and the end surface of the roll paper 1a, and at the same time, the second blade 12 also enters the inside of the end surface packing material 2. In FIG. 4C, 2a is a position where the end surface packaging material 2 is torn. Here, in order to satisfactorily cut the end surface packing material 2 with the first blade 11 and enter the inside thereof, the reciprocating speed of the first blade 11 is 1000 to 2000 st / mi.
The peripheral speed of the packing roll 1 is 20 to 40 mm / sec.
Is preferable.

After the first cutting tool 11 and the second cutting tool 12 have entered the inside of the end surface packing material 2, the swing actuator 22 and the motor 8 are stopped, and the reciprocating motion of the first cutting tool 11 and the second cutting tool 12 is stopped. At the same time, the rotation of the packing roll 1 is stopped. Here, in order to detect that the first cutting tool 11 and the second cutting tool 12 have entered the inside of the end surface packing material 2, a method of measuring a necessary time in advance and setting it with a timer may be used, or A method of detecting that the two-edged tool 12 has entered the inside of the end surface packing material 2 by an optical sensor or the like may be adopted.

Thereafter, the swing actuator 22 is actuated again, and as shown in FIG. 4 (d), this time the second blade 12 is reciprocated at a low speed in the direction of arrow F, and at the same time the motor 8 (see FIG.
(See) rotates in the opposite direction to the previous one to rotate the packing roll 1 in the direction of arrow D at high speed. As a result, the second blade 12
The straight blade 12a cuts the portion of the peripheral packing material 4 adjacent to the end surface packing material 2 in the circumferential direction.

At the time of this cutting, since the rollers 31A and 31B press the end surface packing material 2 against the end surface of the inner roll paper, the downstream portion (the roller 31A where the peripheral surface packing material 4 is cut off by the second blade 12). The portion (pressed with) also rotates with the roll paper, and the portion of the packaging material cut by the second blade 12 is kept taut. For this reason,
Even if the sharpness of the second blade 12 becomes a little poor, the cutting is reliably performed, and the packaging material does not become entangled with the second blade 12. In addition, since a straight blade with good sharpness is used as the second blade 12, cutting can be performed at high speed from this point as well, and good cutting can be performed even when the packing roll 1 is rotated at high speed. Further, at that time, the straight blade 12a can be cut without trouble only by slowly reciprocating. Further, since the straight blade 12a has an acute angle γ (see FIG. 1) with respect to the peripheral surface packaging material 4 to be cut, the straight blade 12a can cut well, and the straight blade 12a cuts the end surface packaging material 2. There is no need to cut it and jump outside. When the peripheral surface packaging material 4 is cut by the second blade 12, the reciprocating speed of the second blade 11 is set to 6
Set the peripheral speed of the packing roll 1 to 2 from 0 to 800 st / min.
It is preferably set to 00 to 400 mm / sec.

When the packing roll 1 continues to rotate in the direction of the arrow D and makes about one rotation, the peripheral packing material 4 is cut over the entire circumference, and the end surface packing material 2 is separated from the peripheral packing material 4.
At this point, the motor 8 stops and the swing actuator 22 also stops. After that, in FIG. 2, the air cylinder 28 of the blade pressing device 24 operates to operate the blade supporting device 1
4 is retracted, and the first blade 11 and the second blade 12 are separated from the end surface of the packing roll 1. At the same time, the rollers 31A and 31B are also retracted and separated from the end surface of the packing roll 1. Then, the packing roll 1 is discharged. This completes one operation.

In the above embodiment, as the holding means for pressing and holding the end surface packing material 2 against the end surface of the roll paper, the one having the rollers 31A and 31B arranged upstream and downstream of the second blade 12 is used. The present invention is not limited to this structure, and as the rollers to be used, the structure may be simplified to have only one roller, or three or more rollers may be used to increase the holding force. When only one roller is used, it is preferable to arrange the roller downstream of the second blade 12 in order to effectively keep the packing material at the cutting position by the second blade 12 in a taut state. Furthermore,
Balls that rotate freely may be used instead of the rollers 31A and 31B.

Further, in the above embodiment, the packing material cutting tool 10 is used.
As the above, the one provided with the first cutting tool 11 for cutting the end surface packing material 2 and the second cutting tool 12 for cutting the peripheral surface packing material 3 is used, but the present invention is not limited to this configuration, but simply the circumferential surface. The packaging material 3 may have only a blade for cutting the packaging material 3.

[0028]

As described above, the end face cutting device for a packing roll of the present invention has a holding means for holding the end face packing material in the vicinity of being cut by a blade against the end face of the roll-like object inside. By providing it, the end surface packing material near the blade can be pressed against the end surface of the roll-like object and rotated together, so that the packing material at the part cut by the blade is always taut. Can be reliably cut, and it can be prevented that the end surface packaging material will be entangled with the blade and cause trouble, and when the blade becomes unsharp, the packaging material is prevented from sagging It has the effect of cutting.

Here, if the holding means is constituted by a roller that is pressed against the end surface packing material and rotates at least at a position downstream of the cutter being cut, the end surface packing material is rotated by the rotation of the roller. It can be pressed against the end surface of the inner roll-like object and surely rotated together with the roll-like object, and by setting that position downstream of the cutter, the separated end-face packing material is held and Entanglement can be efficiently prevented, and the packing material at the portion cut by the blade can be held in a pulled state, so that the cutting can be reliably performed.

[Brief description of the drawings]

FIG. 1 is a schematic side view of an end surface cutting device for a packing roll according to an embodiment of the present invention as viewed from the end surface side of the packing roll.

FIG. 2 is a schematic perspective view showing an enlarged packing material cutting tool in the above embodiment.

FIG. 3 (a) is a schematic view of the state in which the first cutting tool and the second cutting tool are pressed against the end surface of the packing roll in the above embodiment, as seen from the tip side of the cutting tool, and FIG. 3 (b) shows the first cutting tool and the cutting tool. Schematic view of the two blades cut from inside the end surface packing material, viewed from the tip of the blade

4 (a), (b), (c) and (d) are schematic side views for explaining the operation of the above embodiment.

FIG. 5 is a schematic side view of a conventional end face cutting device for a packing roll as seen from the end face side of the packing roll.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 packing roll 2 end surface packing material 4 peripheral surface packing material 6 packing roll supporting / rotating device 7 supporting roller 8 motor 10 packing material cutting tool 11 first knife 12 second knife 30A, 30B holding means 31A, 31B roller 32B driving mechanism 34 guide 35 Mobile Stand 36 Air Cylinder

Claims (2)

[Claims] 1. A portion of the peripheral packing material adjacent to the end surface packing material is circled by a blade inserted between the end surface packing material and the end surface of the inner roll-shaped material while rotating the packing roll around the central axis. In the end face cutting device of the packing roll that cuts in the circumferential direction, in the vicinity of the blade being cut, a holding means for pressing and holding the end face packing material of the packing roll against the end face of the roll-shaped object is provided. End cutting device for packing rolls. 2. The end surface cutting device for a packing roll according to claim 1, wherein the holding means has a roller which is pressed against the end surface packing material and rotates at least at a position downstream of the cutter being cut.