JPH0543474B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to improvements in a paper tube cutting method and cutting device.

<Prior Art> Conventionally, as a spiral paper tube cutting device, one disclosed in Japanese Patent Publication No. 56-39274 is known.
Briefly explaining this device based on FIG. 6, this device includes a cutting core 54 connected to a mandrel 52 of a spiral winder 51 for winding and manufacturing paper tubes via a connecting/rotating rod 53, a circular saw, It consists of a cutting means 55 such as a round knife, and a feeding means (turntable) 56 that moves the cutting means in synchronization with the feeding speed of the paper tube.

A paper tube (not shown) wound around the outer periphery of the mandrel 52 is sent in the direction of the cutting core 54, and the paper tube is traversed to an appropriate size by a cutting means 55 synchronized with this movement.

<Problems to be Solved by the Invention> 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 53 is required, which makes the device difficult to operate. Make it complicated.

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.

Incidentally, Japanese Patent Application Laid-Open No. 58-94998 discloses an apparatus for feeding a long and thin work piece using magnetic force.
However, it is suitable for sending a long and thin work piece, especially a conductive tube, and is difficult to apply to the present invention where the work piece is a non-conductive paper tube.
Moreover, it does not improve the relationship between the cutting core inserted into the paper tube and the connecting/rotating rod, and does not simplify the work of attaching and removing the cutting core.

<Means for Solving the Problems> The first invention of the present application is to transport a paper tube in the axial direction by a paper tube transfer means, insert a cutting core into the paper tube, and cut the paper tube with a circular saw or a circular knife. The above problem is solved by providing a method of cutting a paper tube at a location where the cutting core is located while moving a cutting means such as the above in synchronization with the feeding of the paper tube, having the following configuration. .

In this method, the cutting core is formed separately from the transport means for the paper tube, and a holding device is arranged in the traveling direction of the paper tube. A magnetic force is applied between the holding device and the cutting core, and the cutting core is held in a suspended state by the holding device. Then, by passing the paper tube through the outside of this suspended cutting core, the cutting core is positioned at the cutting point of the paper tube, and the cutting point of the paper tube is cut with a cutting means such as a circular saw or a circular knife. It is for cutting.

In the second invention of the present application, a cutting means such as a circular saw or a circular knife, a feeding means that moves the cutting means in synchronization with the feeding speed of the paper tube transporting means, and a cutting means that is slidable within the paper tube. The cutting core is inserted into the fed paper tube, and the cutting core is positioned while moving a cutting means such as a circular saw or a circular knife in synchronization with the feeding of the paper tube. The above-mentioned problem is solved by providing a paper tube cutting device that cuts the paper tube at a certain point, which has the following configuration.

This paper tube cutting device includes a holding device that moves together with the above-mentioned feeding means. The cutting core described above is formed separately from the paper tube transport means.
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 the cutting core is held in a suspended state by the holding device due to the magnetic force acting between the two. It is something that will be done. Then, by passing the paper tube through the outside of the suspended cutting core, the cutting core is positioned at the cutting location of the paper tube, and by moving the holding device together with the above-mentioned feeding means, the cutting core is moved to the cutting location. This feature is characterized in that the cutting is performed while being held in place.

In the third invention of the present application, there is provided 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 transporting means, and a cutting means capable of sliding within the paper tube. The cutting core is inserted into the paper tube being fed, and the cutting core is positioned while a cutting means such as a circular saw or a circular knife is moved in synchronization with the feeding of the paper tube. The above-mentioned problem is solved by providing a paper tube cutting device that cuts the paper tube at a certain point, which has the following configuration.

This paper tube cutting device includes a magnetism generating device that is fixed so as not to move together with the above-mentioned feeding device, and a blocking device that stops the magnetic force of the magnetism generating device.
The above-mentioned cutting core is formed separately from the paper tube transporting means, and the cutting core is held in a suspended state by the magnetic force generating device due to the magnetic force acting between the cutting core and the magnetic generating device. Then, by passing a paper tube through the outside of this suspended cutting core, the cutting core is positioned at the cutting point of the paper tube, and then the magnetic force is stopped by a cutoff device to perform the cutting. That is.

<Function> The paper tube cutting method of the present invention performs cutting by arranging a cutting core slidably inserted into the paper tube at the cutting point using magnetic force, and using a connecting/rotating rod, etc. This eliminates the need for a cutting core holding and rotating device.

In the paper tube cutting device according to the second aspect, the cutting core is held by the holding device by magnetic force, so that the cutting core continues to be held by the holding device without moving together with the paper tube. When the cutting device starts cutting, the feeding device moves in synchronization with the paper tube in the paper tube advancing direction, and the holding device fixed to the feeding device and the cutting core magnetically held therein also move in synchronization. and move. 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. At this time as well, the cutting core moves within the paper tube while being held by the magnetic force.

In the paper tube cutting device according to claim 3, the cutting core is held by the magnetism generating device by magnetic force,
As a result, 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. This results in
The cutting core escapes the restraint caused by the magnetic field of the magnetic generator, 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. still,
The feeding means also retreats to its original position.

<Example> Embodiments of the present invention will be described 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 winder 51 as in the conventional example. This cutting device 1 includes a cutting device 5 such as a circular saw or a circular cutter, a turntable 2 which is a feeding means for the cutting means, a magnetic generator 3 which is a holding device mounted on the turntable 2, and a magnetic generator 3 which is a holding device attached thereon. It consists of a cutting core 4 arranged.

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 52. Its inner diameter is at least larger than the outer diameter of the paper tube S which is the object to be cut.

Next, as shown in FIG. 2, the cutting core 4 consists of an iron core portion 41 and cutting cores 42, 42 made of synthetic resin or the like arranged at both ends thereof. The outer diameter of this cutting core 4 is
It is set smaller than the inner diameter of the paper tube S. Iron core part 41
The length of is set to be approximately equal to the length of the magnetism generator 3, and when placed inside the magnetism generator 3, the cut core portions 42, 42 at both ends thereof protrude from both ends of the magnetism generator.

Reference numeral 6 in FIG. 1 indicates a sensor such as a phototube or a limit switch for measuring the cutting dimension.

The turntable 2, cutting means 5 and sensing sensor 6 are similar to those of the conventional device,
It moves in sync with the paper tube manufacturing speed. For more information,
The winding angle of the paper tube of the spiral winder 51 is input to the control means of the turntable 2 and synchronized.

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 is an electromagnet, a magnetic field is generated in the direction of the arrow in FIG.

Due to this magnetic force, the cutting core 4 having the iron core portion 41 is held in the central space within the hollow magnetism generator 3.

Paper tube S manufactured by winding around the outer circumference of mandrel 52
passes through the magnetism generating device 3, and the cutting core 4 is passed through the paper tube S (FIG. 3A). Although the paper tube S expands, the cutting core 4 continues to be held within the magnetism generating device 3 without moving together with the paper tube S due to the above-described action.

When the sensing sensor 6 detects the tip of the paper tube, the control means (not shown) starts cutting by the cutting means 5, and the turntable 2 moves in synchronization with the paper tube in the advancing direction of the paper tube (Fig. 3). B).

The magnetic generator 3 fixed on the turntable 2 and the cutting core 4 held at its center also move in synchrony (FIG. 3C). In this state,
Since the resin cutting core 42 protruding from the magnetism generator 3 is placed at the cutting location by the cutting means 5, good cutting can be performed and the blade of the cutting means does not wear out.

When the cutting is completed, the turntable 2 is moved back to its original position (FIG. 3D). At this time too,
While the cutting core 4 is held by magnetic force, it is inserted into the paper tube S.
move within. Thereafter, similar steps are repeated.

As described above, in this embodiment, the holding device is the magnetism generating device 3 using an electromagnet, but it is also possible to use a permanent magnet. On the other hand, the cutting core 4 only needs to be one that is attracted by the magnetic field formed by this holding device, and a ferromagnetic material such as an iron core may be used as in the embodiment. When a magnet is used for the cutting core 4, 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 includes:
It is arranged in front of the spiral winder 51 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 serving as a feeding means for the cutting means, and a magnetism generating device 1.
03 and a cutting core 4 disposed within the magnetism generating device 103.

The magnetism generating device 103 is an electromagnet formed in a hollow cylindrical shape as in the previous embodiment, and its central axis is made to coincide with the central axis of the mandrel 52, and its inner diameter is at least the outer diameter of the paper tube S that is the object to be cut. Although it is larger than the diameter, it is different from the previous embodiment in that it is not fixed to the turntable but to the main body of the cutting device 101. Moreover, the magnetic generator 10
The electromagnet No. 3 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. 2, and consists of an iron core portion 41 and cutting core portions 42, 42 made of synthetic resin or the like arranged at both ends thereof.

Reference numeral 6 in FIG. 4 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.

When a voltage is applied to the magnetism generator 103, which is an electromagnet, a magnetic field is generated in the direction of the arrow in FIG. .

Paper tube S manufactured by winding around the outer circumference of mandrel 52
passes through the magnetism generator 103 and the cutting core 4
2 is passed through the paper tube S (FIG. 5A). Paper tube S
Although the paper tube S expands, the cutting core 4 continues to be held within the magnetism generating device 103 without moving together with the paper tube S due to the above-described action.

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 moves in synchronization with the paper tube in the advancing direction of the paper tube (Fig. 5). B).

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 is connected to the magnetic generator 103.
It escapes from the restraint caused by the magnetic field, falls into the paper tube S, and moves in sync with the paper tube S (Fig. 5C). In this state, the resin-made cutting core 42 is placed at the cutting location by the cutting means 5, so that good cutting can be performed and the blade of the cutting means does not wear out.

When cutting is completed, voltage is applied to the magnetic generator 103 again, and the cutting core 4, which has been advancing forward, retreats to its original position. Incidentally, the turntable 102 also retreats to its original position (FIG. 5D). Thereafter, similar steps are repeated.

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 magnetic field generating device 103, and in addition to a ferromagnetic material such as an iron core as in the embodiment, a magnet may be used. .

In each of the above embodiments, the cutting core 4 is provided with the cutting cores 42, 42 at both ends of the iron core 41, but the cutting core 42 may be provided only at one end of the iron core 41. good. The iron core and the cutting core may not be separated in the length direction, and the outer periphery of the iron core may be coated with a synthetic resin, or the iron powder may be mixed into the synthetic resin. In the device according to claim 3,
It is also possible to arrange the cutting core in the center and the iron cores at both ends. 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, and a cutting core is placed in the center of both holding devices. A cutting means should be provided.

The holding device according to claim 2 and the magnetism generating device according to claim 3 may have a hollow cylindrical shape, or may have a plurality of magnets arranged to surround the cutting core. Thereby, the 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.

In the embodiment, a spiral paper tube has been described, but the present invention can be applied to cutting other paper tubes such as flat-wound paper tubes. Further, in the embodiment, an example is shown in which the tube making device is used together with a spiral wander, but it is of course possible to separate the tube making device and use it in a separate process.

<Effects of the Invention> As described above, the first invention of the present application relates to a paper tube cutting method, and the second and third inventions of the present application relate to a paper tube cutting device, and provide a novel method for holding a cutting core required during cutting. and equipment.
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. Thereby, the device can be simplified, the cutting device can be easily handled, and failures are less likely to occur. Furthermore, when replacing the cutting core, it is only necessary to replace the cutting core, making it extremely easy to replace the cutting core.

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.

[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 diagram of holding the cutting core, and FIGS. 3A to 3D are process explanatory diagrams of the cutting method according to the embodiment. FIG. 4 is an overall view of an embodiment of a cutting device according to claim 3, FIGS. 5A to D are process explanatory diagrams of a cutting method according to the same embodiment, and FIG. 6 is an overall view of a conventional cutting device. . DESCRIPTION OF SYMBOLS 1,101... Cutting device, 2,102... Turntable, 3,103... Magnetism generator, 4... Cutting core, 5... Cutting means, 6... Sensing sensor, 41... Iron core part, 42, 42... Cutting core part , 51...Spiral winder, 52...Mandrel, S...Paper tube.

Claims (1)

[Scope of Claims] 1. A paper tube is fed in the axial direction by a paper tube transfer means, a cutting core is inserted into the paper tube, and a cutting means such as a circular saw or a circular knife is used to move the paper tube along with the feeding of the paper tube. In the method of cutting the paper tube at the position of the cutting core while moving in synchronization, the cutting core is formed separately from the means for transporting the paper tube, and a holding device is arranged in the traveling direction of the paper tube. , a magnetic force is applied between this holding device and the cutting core,
The cutting core is held in a suspended state by a holding device, and a paper tube is passed through the outside of the cutting core in this suspended state, so that the cutting core is positioned at the cutting point of the paper tube, and the cutting point of this paper tube is A method for cutting a paper tube, the method comprising cutting the paper tube with a cutting means such as a circular saw or a circular knife. 2. Equipped with 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 conveying means, and a cutting core slidably inserted into the paper tube, A cutting core is inserted into the paper tube being fed, and a cutting means such as a circular saw or a circular knife is moved in synchronization with the feeding of the paper tube to cut the paper tube at the location where the cutting core is located. In the paper tube cutting device, the paper tube cutting device includes a holding device that moves together with the above-mentioned feeding means, and the above-mentioned cutting core is formed separately from the paper tube feeding means, 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 the cutting core is held in a suspended state by the holding device due to the magnetic force acting between the two. By passing the paper tube through the outside of this suspended cutting core, the cutting core is positioned at the cutting point of the paper tube, and the cutting is performed by moving the holding device together with the above-mentioned feeding means. A paper tube cutting device characterized in that the cutting is performed while holding the core at the cutting point. 3. Equipped with 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 conveying means, and a cutting core slidably inserted into the paper tube, A cutting core is inserted into the paper tube being fed, and a cutting means such as a circular saw or a circular knife is moved in synchronization with the feeding of the paper tube to cut the paper tube at the location where the cutting core is located. In the paper tube cutting device, the paper tube cutting device includes a magnetism generating device fixed so as not to move together with the above-mentioned feeding means, and a blocking means for stopping the magnetic force of the magnetism generating device, and the above-mentioned cutting core is , is formed separately from the means for transporting the paper tube, and the cutting core is held in a suspended state by the magnetic force generated by the magnetic force generated between the paper tube and the magnetic generating device, and cutting in this suspended state is performed. A paper tube characterized in that the cutting core is positioned at the cutting point of the paper tube by passing the paper tube outside the core, and then the magnetic force is stopped by a cutoff device to perform the cutting. Cutting device.