JPH01295794A - Method and device for cutting off paper tube - Google Patents

Abstract

PURPOSE:To dispense with a device for holding and rotating a cut-off core such as connecting and rotating rod and simplify the whole cut-off device and exchange of the cut-off core by disposing the cut-off core on a cut-off position in a paper tube with a magnetic force to cut off the paper tube. CONSTITUTION:A cut-off core 4 is held by a magnetic force generated by a magnetism generator 3. When under such condition a cut-off device 5 begins to cut off, a feed means (turntable) 2 shifts in the proceeding direction of a paper tube (a type of hollow tubular body) in synchronization with the paper tube S. Also, said generator 3 fixed to the feed means 2 and the cut-off core 4 held magnetically therewith shift in synchronization with the paper tube. That is, the cut-off core 4 is located on a cut-off position by the magnetic force so that the paper tube S is cut off by a cut-off device 5 while such condition is held. When the cut-off core 4 is exchanged, the cut-off core 4 is removed from the paper tube S for exchange by erasing the magnetic force.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to improvements in a cutting method and a cutting device that are advantageous for paper tubes, particularly spiral paper tubes.

<Prior Art> Conventionally, the device shown in FIG. 6 has been widely used as a spiral paper tube cutting device. This device is a spiral winder +1 mandrel (
□A cutting core (goods) connected via a connecting/rotating rod (to), a cutting means such as a circular saw or a circular knife, and this cutting means being synchronized with the feeding of the paper tube. It consists of a feeding means (turn table) @ for moving the table.

A paper tube (not shown) wound around the outer circumference of the mandrel is sent toward the cutting core, and the paper tube is traversed to an appropriate size by a cutting means synchronized with this movement.

<Problem that the invention seeks to solve> However, the above conventional example has the following problems.

First, in order to rotate and move the cutting core in synchronization with the paper tube, the mandrel and the cutting core must be connected, and for this purpose, a connecting/rotating rod is required.
Equipment becomes more complex.

Second, if the diameter of the paper tube changes, the cutting core must also be replaced, but it is time-consuming to attach and remove the cutting core.

Means for Solving the Problems> Accordingly, the present invention provides that, when a paper tube is traversed by a cutting means such as a circular saw or a circular knife, a cutting core is slidably inserted into the paper tube, and this cutting core is applied with a magnetic force. The above-mentioned problem is solved by providing a method for cutting a paper tube, which is characterized in that the paper tube is cut by coordinating the cut point with the cut point.

Further, as a device for carrying out this method, a cutting means such as a circular saw or a circular knife, a feeding means for moving this cutting means in synchronization with the feeding speed of the paper tube, and a holding device that moves together with this feeding means, A cutting core is slidably inserted into a paper tube, and at least one of the holding device and the cutting core forms a magnetic field, and the other is relatively attracted by this magnetic field, and acts between the two. A paper tube cutting device is provided, characterized in that it is configured to perform cutting while holding a cutting core at a cutting location using magnetic force.

Further, as other devices for carrying out the above-mentioned cutting method, a cutting means such as a circular saw or a circular knife, a feeding means for moving the cutting means in synchronization with the feeding speed of the paper tube, and a device that prevents the cutting means from moving together with the feeding speed of the paper tube are provided. A magnetic generator fixed to the magnetic generator, a blocking means for stopping the magnetic force of the magnetic generating device, and a cutting core arranged at the cutting point by the magnetic force of the magnetic force generating device, and then the magnetic force is stopped by the blocking device to perform cutting. A paper tube cutting device is provided.

Function> The paper tube cutting method of the present invention is a method in which a cutting core, which is slidably inserted into a paper tube, is positioned at a cutting point by magnetic force to perform cutting, and a connecting/rotating rod, etc. A cutting core holding and rotating device is not required.

In the paper tube cutting device according to claim 2, the cutting core is
The cutting core is held by the holding device by the magnetic force, so that the cutting core does not move together with the paper tube (it continues to be held by the holding device. Then, when the cutting device starts cutting,
The feeding means moves in synchronization with the paper tube in the paper tube traveling direction, and the holding device fixed to the feeding means and the cutting core magnetically held therein also move in synchrony. That is, in this device, the cutting core is positioned at the cutting location by magnetic force, and cutting is performed while maintaining this state. When the cutting is completed, the feeding means is retracted to its original position. In the paper tube cutting device according to claim 3, wherein the cutting core is held inside the paper tube while being held by magnetic force at this time, the cutting core is
The cutting core is held in the magnetism generator by the magnetic force, so that the cutting core continues to be held in the magnetism generator without moving together with the paper tube.

When the cutting device starts cutting, the feeding device moves in the paper tube traveling direction in synchronization with the paper tube. At the same time, the cutoff device operates and no voltage is applied to the magnetism generating device, and no magnetic force is generated. As a result, the cutting core escapes from the restraint by the magnetic field of the magnetism generating device, falls into the paper tube, and moves in sync with the paper tube. That is, in this device, the cutting core is aligned to the cutting location by magnetic force, and then the magnetic force is cut off to perform the cutting. Once the cutting is complete, the magnetic generator is energized again, thereby pulling the cutting wick, which has advanced forward, back to its original position. Note that the feeding means also retreats to its original position.

<Example> The present invention will be described in detail below based on the drawings.

FIG. 1 is an overall view of an embodiment of a cutting device according to claim 2, and this cutting device (1) is arranged in front of a spiral wine goo 60 as in the conventional example. This cutting device (
1) consists of a cutting means (5) such as a circular saw or a circular cutter, a turntable (2) which is a feeding means for this cutting means, a magnetic generator (3) which is a holding device attached thereto, and a magnetic It consists of a cutting wick (4) placed within the generator.

The magnetism generator (3) is an electromagnet formed into a hollow cylindrical shape, and its central axis is aligned with the central axis of the mandrel. Its inner diameter is at least larger than the outer diameter of the paper tube (S) that is the object to be cut.

Next, the cutting core (4) is cut into the iron core (4) as shown in FIG.
company) and the cutting core made of synthetic resin placed on both ends - (
The outer diameter of this cutting core (4) consists of a paper tube (S).
) is set smaller than the inner diameter of The curved length of the iron core is set to be approximately equal to the length of the magnetism generator (3), and when placed inside the magnetism generator (3), the cut cores at both ends -
(Rotation) protrudes from both ends of the magnetic generator.

In FIG. 1, (6) indicates a sensor such as a phototube or a limit switch for measuring the cutting dimension.

The turntable (2), the cutting means (5) and the sensing sensor (6) are similar to those of the conventional device and move in synchronization with the paper tube manufacturing speed. For details, please refer to the winding angle of the paper tube of Spiral Wine Goo 51) on the turntable (
2) and synchronizes it by inputting it to the control means.

Next, a method of cutting a paper tube using this device will be explained.

■ When a voltage is applied to the magnetism generator (3), which consists of an electromagnet, a magnetic field is generated in the direction of the arrow in Figure 2.

■ This magnetic force creates a cutting core (4) with an iron core (goods).
) is held in the central space within the hollow magnetic generator (3).

■ The paper tube (S) manufactured by winding around the mandrel is
The cutting core (4) passes through the magnetic generator (3), and the cutting core (4) passes through the paper tube (
The paper tube (S) is stretched as it is passed through the paper tube (S) (Fig. 3 (A)), but the cutting core (4) moves together with the paper tube (S) due to the action of (■) above. No, magnetic generator (3)
continues to be held within.

■ When the sensing sensor (6) detects the tip of the paper tube, the control means (not shown) causes the cutting means (5) to start cutting, and the turntable (2) synchronizes with the paper tube in the traveling direction of the paper tube. (Figure 3 (B)).

A magnetic generator (
3) and the cutting core (4) held at its center also move in unison (Fig. 3(C)). In this state, the magnetic generating bag! (3) The more protruding resin cutting core (roller) is placed at the cutting location by the cutting means (5), so
Good cutting can be performed, and the blade of the cutting means does not wear out.

■ When cutting is completed, the turntable (2) retreats to its original position (Fig. 3 (D)). At this time, the cutting core (4) remains held by the magnetic force and is attached to the paper tube (S). move within. Thereafter, similar steps are repeated.

As described above, in this embodiment, the holding device is a magnetism generating device (3) using an electromagnet, but it is also possible to use a permanent magnet. On the other hand, it is sufficient for the cutting core (4) to be attracted by the magnetic field formed by this holding device, and as in the embodiment, a ferromagnetic material such as an iron core may be used. In this case, the holding device may be made of a ferromagnetic material such as iron.

Next, FIG. 4 is an overall view of an embodiment of the cutting device according to claim 3, and this cutting device (101) is arranged in front of the spiral wine goo 6υ as in the conventional example. This cutting device (101) includes a cutting means (5) such as a circular saw or a circular cutter, a turntable (102) which is a feeding means for this cutting means, a magnetic generator (103), and a magnetic generator (103). It consists of a cutting core (4) placed inside.

The magnetism generator (103) is an electromagnet formed in a hollow cylindrical shape as in the previous embodiment, and its central axis is aligned with the central axis of the mandrel (2), and its inner diameter is at least the same as the paper tube that is the object to be cut. (S) Although it is said to be larger than the outer diameter, it is not fixed to the turntable and the cutting device (101)
It differs from the previous embodiment in that it is fixed to the main body. Further, the electromagnet of the magnetism generator (103) is connected to a power source via an on-off switch (not shown), and this on-off switch acts as a means for interrupting magnetic force. Note that this opening/closing switch is controlled by a control means (not shown).

Next, the cutting core (4) is similar to the previous embodiment shown in FIG. .

In FIG. 4, (6) indicates a sensor such as a phototube or a limit switch for measuring the cutting dimension.

The turntable (102), cutting means (5) and sensing sensor (6) are similar to those of the conventional device and move in synchronization with the winding speed of the paper tube.

Next, a method of cutting a paper tube using this device will be explained.

(2) When a voltage is applied to the magnetism generator (103) consisting of an electromagnet, a magnetic field is generated in the direction of the arrow in Figure 2.

■ This magnetic force creates a cutting core (4) with an iron core (sha).
) is held in the central space within the hollow magnetic generator (103).

■ Paper tube (S) manufactured by winding around the outer circumference of mandrel (2)
passes through the magnetism generator (103), and the cutting core passes through the paper tube (S) (Fig. 5 (A)), the paper tube (+9)
Although the paper tube (S) expands, the cutting core (4) continues to be held within the magnetic generator (103) without moving together with the paper tube (S) due to the effect of (2) above.

■ When the sensing sensor (6) detects the tip of the paper tube, the control means (not shown) causes the cutting means (5) to start cutting, and the turntable (102) synchronizes with the paper tube in the advancing direction of the paper tube. (Figure 5 ('B)).

(2) At the same time, the control means activates the shutoff device so that no voltage is applied to the magnetism generating device (103), and no magnetic force is generated.

As a result, the cutting core (4) escapes from the restraint by the magnetic field of the magnetic generator (103) and falls into the paper tube (S).
) (Figure 5 (C)).

In this state, the cutting core made of resin is connected to the cutting means (
Since it is arranged at the cutting point according to 5), it is possible to perform a good cut, and the blade of the cutting means does not wear out.

■ When cutting is completed, voltage is applied again to the magnetic generator (103), which causes the cutting core (
4) retreats to the original position. In addition, a turntable (1
G2) also retreats to its original position (No. 511 (D)),
The same process is repeated below.

As described above, in this embodiment, it is sufficient that the cutting core (4) is one that is attracted to the magnetic field formed by the magnetism generator (103), and in addition to a ferromagnetic material such as an iron core as in the embodiment, a magnet may be used as the cutting core (4). May be used.

In each of the above embodiments, the cutting core (4) is provided with a cutting core shaft at both ends of the iron core (sha), but the cutting core (4) is provided at one end of the iron core (sha). The iron core and cutting core may not be separated in the length direction, and the outer periphery of the iron core may be coated with synthetic resin, or iron powder may be mixed in the synthetic resin. In the device according to claim 3, which may be formed by using a cutting core, it is also possible to arrange the cutting core in the center and the iron cores at both ends thereof. Further, it is possible to use a similar cutting core in the device according to claim 2, but in this case, holding devices are arranged at two locations corresponding to the iron core portions at both ends,
The cutting means is arranged in the center of both holding devices.

The shape of the holding device according to claim 2 and the magnetism generating device according to claim 3 may be hollow cylindrical, or a plurality of magnets may be arranged so as to surround the cutting core. A cutting core can be held in the central space of the plurality of magnets. Further, if it is possible to hold the iron core, it is not necessary to surround the cutting core.

<Effects of the Invention> As described above, the cutting method and cutting device of the present invention can provide a novel method and device for cutting paper tubes, particularly for holding cutting cores. That is, since the cutting core is positioned at the cutting location by magnetic force, a cutting core holding and rotating device such as a connecting/rotating rod is not required. This makes it possible to simplify the device, make it easier to handle the cutting device, and prevent malfunctions.Also, when replacing the cutting core, all you have to do is replace the cutting core, making it extremely easy to do so. Exchange becomes possible.

In addition, if the holding device/magnetism generating device uses an electromagnet as in the example, it becomes possible to adjust the strength of the magnetic force by changing the voltage, and this makes it possible to adjust the diameter of the cutting core when changing dimensions. The magnetic force can be easily adjusted according to changes, and the cutting core can be held well.

As described above, the paper tube cutting method and cutting device of the present invention bring about revolutionary progress in holding the cutting core.

[Brief explanation of the drawing]

FIG. 1 is an overall view of an embodiment of the cutting device according to claim 2, FIG. 2 is an enlarged explanatory view of holding the cutting core, and FIG.
^) to (D) are process explanatory diagrams of the cutting method according to the same embodiment, Fig. 4 is an overall diagram of the embodiment of the cutting device according to claim 3, and Fig. 5 (A) to (D) are the same implementation. FIG. 6, which is a process explanatory diagram of a cutting method according to an example, is an overall view of a conventional cutting device. (1) (101)... Cutting device, (2) (102)... Turntable, (3) (10
3)... Magnetism generator, (4)... Cutting core, (5)
... Cutting means, (6) ... Sensing sensor, I...
Iron core part, @-...cutting core part, 6D...spiral wine goo, (to)...mandrel, (S)...paper tube,

Claims (1)

[Claims] 1. When a paper tube is traversed by a cutting means such as a circular saw or a circular knife, a cutting core is slidably inserted into the paper tube, and the cutting core is positioned at the cutting point by magnetic force. A method for cutting a paper tube, which is characterized in that the cutting is performed by cutting the paper tube. 2. A cutting means such as a circular saw or a circular knife, and a feeding means for moving the cutting means in synchronization with the feeding speed of the paper tube;
It includes a holding device that moves together with the feeding means and a cutting core that is slidably inserted into the paper tube, and at least one of the holding device and the cutting core forms a magnetic field, and the other is attracted to each other by the magnetic field. What is claimed is: 1. A paper tube cutting device, characterized in that the cutting core is held at the cutting point by a magnetic force acting between the two while cutting is carried out. 3. A cutting means such as a circular saw or a circular knife, and a feeding means for moving the cutting means in synchronization with the feeding speed of the paper tube;
A magnetic generator fixed so as not to move together with the feeding means, a blocking device that stops the magnetic force of the magnetic generator, and a cutting device that uses the magnetic force of the magnetic generator to position the cutting core at the cutting location, and then uses the blocking device to stop the magnetic force. A paper tube cutting device characterized in that it is configured to stop and cut.