JP3265633B2 - Paper tube cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper tube cutting device for cutting a paper tube to a required length. This paper tube is used, for example, as a core for winding a sheet.

[0002]

2. Description of the Related Art A conventional paper tube cutting device cuts a paper tube by rotating a paper tube while pressing a round blade against a cutting position of the paper tube. At this time, if the cutting is performed without supporting the inner circumference of the paper tube at the portion where the round blade is pressed, burrs are generated on the inner circumference of the cut end. When mounted on the outer circumference of the chuck of the winding device, the paper tube having the burrs tends to be eccentric with respect to the center of rotation due to the burrs. Then, the eccentrically mounted paper tube rotates eccentrically during the winding operation, which causes the support arm of the paper tube to vibrate. Therefore, at the conventional paper tube cutting position, the uncut original paper tube supplied from the paper tube manufacturing factory is penetrated and supported by a longer shaft so that burrs do not occur at the cut end of the paper tube. The round blade is pressed and cut while receiving the inner peripheral surface of the paper tube. Then, in order to cut the original paper tube to a required length, the round blade is moved along the longitudinal direction of the paper tube and set at a required cutting position. As such a paper tube cutting device, for example,
As described in Japanese Patent Application No. 50-61780,
The original paper tube can be held while inserted in the tube,
A plurality of shafts that can be rotationally driven in a timely manner and the plurality of shafts
Support cantilever at predetermined intervals in parallel, and make each axis at least
Tar that can be positioned sequentially at the supply position and the cutting position
At the free end of the shaft at the paper tube feeding position.
Adjacent to the axis and extended parallel to the axis direction of the axis,
Insertion device that can insert the original paper tube around the shaft
Means for feeding the original paper tubes one by one to the insertion device,
Cut the paper tube on the shaft at the cutting position to the required length
A second cutting blade and a paper tube cut by the second cutting blade
And a means for removing from the shaft.

[0003]

When a paper core is used as a core for winding a sheet, the sheet width is various and the required paper core length is also various. When the original paper tube is cut into a required length, a piece remains at the end that cannot be used as a core. When the number of the cut pieces increases, the yield of the paper tube deteriorates. Therefore,
In order to improve the yield of the paper core, it is desirable to increase the length of the original paper core so as to minimize the use of scraps that cannot be used as a core.

However, in the conventional paper tube cutting device, if the length of the original paper tube is increased, the length of a shaft for penetrating and supporting the original paper tube must also be increased.

[0005] However, even if the length of the original paper tube is increased, the inner diameter of the original paper tube must be kept constant. Therefore, only the length of the shaft for penetrating and supporting the original paper tube is increased. The outer diameter cannot be increased. Thus, it is not preferable in terms of mechanical strength to increase only the length without increasing the outer diameter of the shaft. In particular, in a case where the shaft that penetrates and supports the original paper tube is cantilevered and the paper tube cutting device is to be automated, it is advantageous to reduce the length of the shaft from the viewpoint of mechanical strength. is there.

Further, the installation location of the paper tube cutting device needs to be at least a length obtained by adding the length of the original paper tube to the length of the shaft in the longitudinal direction of the shaft. When the length is increased, the length in the axial longitudinal direction increases in proportion to about twice the length of the original paper tube, and becomes very long. In addition, the length of the installation site becomes extremely long, which makes it difficult to efficiently use the floor area in the factory, and the length of the original paper tube in the existing factory becomes longer depending on the installation location. Or become difficult.

An object of the present invention is to provide a paper tube cutting apparatus which can efficiently obtain a required length of a paper tube having a clean cut using a shaft shorter than the original paper tube and have a good yield of the paper tube. Aim.

[0008]

According to the present invention, there is provided a paper tube cutting apparatus comprising: a plurality of shafts for holding the original paper tube;
Shorter and closer to the tip of the shaft in the first position.
The original paper tube can be cut at a predetermined position on the outer circumference of the shaft.
First cutting blade and the tip of the original paper tube inserted by the insertion device
The length from the end to the cutting position by the first cutting blade is the required length
The original paper tube so that it becomes one or more of the cut paper tubes.
A stopper for positioning the tip of the blade and the first cutting blade.
The part of the original paper tube that has been cut off, protruding from the shaft
And an extraction device for extracting the shaft from the shaft .

[0010]

[Action] The stopper is positioned so that the interval between the stopper and the cutting blade having a fixed cutting position is a required cutting length,
Since those are the Motokami tube to the stopper, when inserted the Motokamikan the shaft periphery, the cutting blade, it is the required cutting position of Motokamikan. Also, since the amount of insertion of the original paper tube around the shaft depends on the required cutting length, even if the original paper tube is long,
There is no need to insert the entire length around the shaft.

[0011]

An embodiment will be described with reference to the drawings.

FIG. 1 is a plan view schematically showing the entire structure of a paper tube cutting device, and FIG. 2 is a side view of the same. In FIG. 1, 1 is a shaft, 2 is a first cutting blade provided at a fixed cutting position on the shaft 1,
3 is a stopper. Further, in the paper tube cutting device of the present invention, the original paper tube 4 longer than the shaft 1 is fitted to the outer periphery of the shaft 1 and cut to a required length by the first cutting blade 2.

[0013] Motokamikan 4 is moved in the direction of the arrow by the insertion device 5 automatically inserted into the outer periphery of the shaft 1, the cut Motokamikan 4, portion protruding from the shaft 1 extractor 6
Extract automatically using. Further, the supply of the original paper core 4 to the insertion device 5 is automatically performed by the paper core hopper 7. This paper tube hopper 7 stores a large number of original paper tubes 4 on a support sheet 8 in a storage chamber 7a, winds the support sheet 8 around a winding shaft 9 and transfers the support sheet 8 to a supply chamber 7b. By rotating the disk 10 having the concave portion for receiving the original paper tubes 4, the original paper tubes 4 are sent out one by one onto the insertion device 5.

In the present invention, the original paper tube 4 may be finally cut to a required length by the first cutting blade 2. Alternatively, the paper tube 11 may be cut to a length obtained by adding the individual lengths of the plurality of finally required paper tubes 11 and further cut to the finally required length at the second position .

[0015] disconnect shaft 1 in order to efficiently performed with the are provided with two. One end of the shaft 1 is attached to a turret 12 so that the shaft 1 can rotate and the shaft 1 is cantilevered. When the turret 12 rotates about a horizontal axis parallel to the axis 1, the first and second positions in front of the insertion device 5 (FIG. 1).
At the position of the lower shaft 1). In addition, the turret 12 can be rotationally driven at appropriate times by a rotational drive mechanism (not shown) provided on the rear side.

Above the shaft 1 at the second position, the portion of the original paper tube 4 cut by the first cutting blade 2 at the first position, which remains on the shaft 1, is cut to a final position. A second cutting blade 13 for providing a paper tube 11 of a required length is provided, and in front of the shaft 1 at the second position, a final extruded from the shaft 1 by an extrusion device 14 is provided. A receiving conveyor 15 for receiving and transporting the paper tube 11 having a length necessary for the insertion is provided in parallel with the insertion device 5.

As shown in FIG. 3, the first cutting blade 2 is held by a holder 17 at the tip of a slide body 16.
The slide body 16 is slidably and non-detachably mounted on a rail 20 on a bracket 19 fixed to a fixed beam 18, and is driven forward and backward with respect to the shaft 1 by a fluid pressure cylinder device 21. The first cutting blade 2 can move forward and backward with respect to the shaft 1 by driving the fluid pressure cylinder 21.

The shaft 1 is provided so that the original paper tube 4 inserted on the outer periphery of the shaft 1 can be rotated together with the shaft 1 inside the cutting position of the first cutting blade 2 near the tip thereof.
It has a known chuck means 22.

The support roller 24 attached to the support arm 23 below the first cutting blade 2 fits the new original paper tube 4 or the remaining original paper tube 4 once cut on the shaft 1. This is to prevent the shaft 1 from bending when cutting by the first cutting blade 2.

The stopper 3 is supported by a movable table 26 slidable on a rail 25 provided in parallel with the shaft 1 so as to be swingable about a central axis parallel to the shaft 1. It is driven dynamically. And
By performing a driving operation of a motor 29 that drives the screw shaft 28 screwed to the moving table 26 in the forward and reverse directions, the screw shaft 28 can be attached to a required position in the guide direction of the rail 24.

As shown in FIG. 4, the first cutting blade 2 is a round blade, and the original paper tube 4 which rotates together with the shaft 1 held on the outer periphery of the shaft 1 by the driving of the hydraulic cylinder device 21 during the cutting operation. , And can cut the original paper tube 4 while rotating. When the cutting edge reaches the outer periphery of the shaft 1, the fluid pressure cylinder device 21 drives the turret 12 to retreat to a retracted position where the turret 12 does not hinder the turning of the shaft 1 as indicated by a chain line.

When the turret 12 is rotated by driving the rotary actuator 27, the stopper 3 is moved to the retracted position shown by the solid line in FIG. Attached to

The swing arm 23 is provided with a hydraulic cylinder device 23.
The turret 12 can be retracted to the position shown by the chain line when the turret 12 is rotated by the driving of a.

As shown in FIG. 5, the insertion device 5 is provided with a plurality of roller casters 30 in a horizontal direction as shown in FIG. 3, and the original paper tube 4 is placed on the roller casters 30. Thus, it can be supported so as to be concentric with the shaft 1. Further, a pusher 33 is attached to an endless chain 32 hung on the left and right sprockets 31. The pusher 33 can move in the horizontal direction as the endless chain 31 circulates. By transmitting the rotation of the forward / reverse rotatable motor 31 to the sprocket 31 on the left side, the original paper tube 4 placed on the roller caster 30 is transmitted.
Is pushed out until the leading end of the original paper tube 4 hits the stopper 3 provided at the operation position, or returns to the retreat limit. As shown in FIG. 5, the extracting device 6 includes a roller 39 having a friction coefficient increased by a rubber winding or the like at the tip of a motor 38 fixed to a bracket 37 attached to a fixed frame 36 so as to be able to move up and down. Then, the bracket 37 is moved up and down by the actuator 40 to press the roller 39 against the original paper tube 4, and the roller 39 is driven to rotate by the motor 38, whereby the original paper tube 4 can be removed.

The second cutting blade 13, as shown in Figure 6, first
As in the case of the cutting blade 2, the holder 42 at the tip of the slide body 41
It is held by. Then, the slide body 41 is provided with a rail 45 provided on a bracket 44 fixed on the moving table 43.
It is slidable and attached so that it cannot fall off. The slide body 41 is driven forward and backward by the fluid pressure cylinder device 46 toward the outer periphery of the shaft 1.

The moving table 43 is slidably mounted on a rail 47 on the fixed beam 50 parallel to the axis 1 so as not to fall off. The screw shaft 4 driven by the motor 48
9 and is moved by rotation of the screw shaft 49. Therefore, the cutting position by the second cutting blade 13 can be changed in the longitudinal direction of the shaft 1 by operating the motor 48.

The pushing device 14 has an extruding body 14a similar to the stopper 3. Extruded body 14a
Is a table 52 slidable on a rail 51 parallel to the axis 1.
Are supported so as to be able to swing around a support shaft 53 parallel to the shaft 1, and are driven to swing by a rotary actuator 54. The base 52 is engaged with an endless chain 56 hung on the left and right sprockets 55, and moves parallel to the shaft 1 by rotating the sprocket 55 by a motor 57. And when extruding the paper tube 11 from the shaft 1,
At a standby position (shown by a solid line in FIG. 6) behind the sleeve 58 slidably fitted on the outer periphery of the shaft 1, the rotary actuator 54 is driven to move from a retracted position shown by a solid line in FIG. Then, while pushing the rear end of the sleeve 58 together with the table 52 by the drive of the motor 57, it moves from the standby position to the position indicated by the chain line in FIG. Thus, the paper tube 11 can be pushed out onto the receiving conveyor 15. The extruded body 14 that has extruded the paper tube 11 is at the retracted position by driving the rotary actuator 54 and is at the standby position by driving the motor 57.

Next, the operation of the paper tube cutting device of this embodiment will be described with reference to FIG. FIG. 7 shows an example in FIG.
The original paper core 4 shown in FIG.
For explaining the case of cutting into a plurality of paper tubes 11
Things .

As shown in FIG. 7A, first, the insertion device 5
The original paper tube 4 is supplied above. Meanwhile, the stopper 3
The distance from the first cutting blade 2 to the tip of the original paper core 4 is the second position
Paper tubes 11 (in this example,
(The three paper tubes shown in FIG. 7 (E)).
A necessary position for preventing insertion of the original paper tube 4 is obtained . What
In this embodiment, although omitted in FIG. 7, FIG.
As shown, a sleeve 58 is slidably fitted on the shaft 1.
The original paper tube 4 is inserted into the sleeve 58
Until it hits the stopper 3 and through the sleeve 58
The stopper 3 prevents insertion. So this
In the embodiment, the length of the sleeve is shorter than when there is no sleeve.
The position of the stopper becomes farther than the cutting blade 5 by the distance.

Next, as shown in FIG. 7 (B), the pusher 33 of the insertion device 5 is advanced and the original paper tube 4 is inserted into the outer periphery of the shaft 1 at the first position until it hits the stopper 3. I do. Thereafter, the cutting blade 1 advances and cuts the original paper tube 4 on the shaft 1.

Next, as shown in FIG. 7C, the extracting device 6 operates to return the cut rear portion of the original paper tube 4 to the insertion position 5.

Next, as shown in FIG. 7D, the turret 12 rotates, and the shaft 1 at the first position and the shaft 1 at the second position are exchanged. At this time, the stopper 3 has been retracted to the retracted position shown in FIG. Then, as in the case of FIG. 7A, the rear portion of the cut original paper tube 4 on the insertion device 5 is set at a position for cutting to the required length. On the other hand, at the second position, the second cutting blade 13 moves to the required cutting position and
Starts cutting the front part of the original paper tube 4 cut at the first position on the shaft 1 moved from the position to the second position.

Next, as shown in FIG. 7 (E), the pusher 33 of the insertion device 5 advances, and the rear portion of the cut original paper tube 4 is attached to the stopper 3 on the outer periphery of the shaft 1 at the first position. Insert until it hits. Thereafter, the first cutting blade 2 cuts the rear part of the original paper tube 4 inserted on the shaft 1 at the first position. In the second position, the second cutting blade 13 moves to the required cutting position, and the front of the cut original paper tube 4 on the shaft 1 is finally moved to the required length of the paper tube 11. Cut into pieces.

When the second cutting blade 13 completes the cutting at the second position and the necessary paper tube 11 is completed, the pushing device 14 operates as shown in FIG. 7 (F), and the paper tube 11 is received from the shaft 1 by the receiving conveyor. Extrude up to 15. When the first cutting blade 2 completes the cutting at the first position, the extracting device 6 operates to extract the rear portion of the newly cut original paper tube 4 onto the inserting device 5. When the rear length of the original paper tube 4 is long enough to finally obtain the necessary paper tube 11, the operation shown in FIG. 7D is repeated again. If the length of the rear part of the original paper core 4 is such that the required core 11 cannot be finally obtained, the rear part of the original paper core 4 is not extracted by the extraction device 6 and the turret 12 rotates. By the second
At the first position, a new original paper tube 4 is supplied onto the insertion device 5 as shown in FIG.
A new original paper tube 4 is inserted into the shaft 1 as shown in FIG. Then, the rear portion of the original paper tube 4 on the shaft 1 at the second position, the length of which cannot obtain the necessary paper tube 11, is pushed out of the shaft 1 by the pushing device 14.

Although the present invention has been described with reference to an embodiment, the embodiment can be variously changed without changing the gist of the invention. For example, the stopper and the second cutting blade may be placed at required positions by manual operation, or the cutting length may be set to perform automatic positioning. When the winding device with a slitter is operated based on a production plan established by a production planning computer, for example, a motor 3 for positioning a stopper 3 shown in FIG. 3 based on a command signal from the production planning computer. And a motor 4 for positioning the second cutting blade 13 shown in FIG.
8 may be automatically controlled, and only the necessary paper core may be supplied to the winding device with a slitter just in time.

[0036]

According to the present invention, a plurality of axes are respectively assigned to the aforementioned axes.
Shorter than the paper tube, insert the shaft into the first position with the insertion device.
The leading end of the original paper core to be inserted is
Cutting paper of the required length, the length up to the cutting position by the cutting blade
Position the stopper with one or more pipes.
The original paper tube at a predetermined position on the outer periphery of the shaft near the tip of the shaft.
Cut with the first cutting blade and cut with the first cutting blade
Pull out the part of the paper tube that protrudes from the shaft from the shaft
By removing the original paper tube, the original paper tube that is longer than the shaft can be cut without generating burrs at the cut end .
The axis is moved from the first position to the second position by the turret.
Can be moved. In addition, the installation space of the paper tube cutting device can be saved, and the lack of mechanical strength of the shaft can be avoided. Further, since a long original paper tube is used, the cut end of the original paper tube can be reduced as much as possible, and the yield of the paper tube can be increased. Furthermore, even if the original paper tube is longer than the shaft, the original paper tube does not have to be inserted into the shaft over its entire length, and if it hits the stopper, the cutting blade is attached to the required cutting position, it is possible to shorten the preparation time to disconnect from the insertion of Motokamikan, efficiently cutting operation Ru done. Further, the original paper tube is cut to a required length on the shaft provided at the first position, the turret is rotated, and the cut original paper tube is moved to the second position together with the shaft, and is then moved to the second position. Again cut short and at the same time
Inserting and cutting the original paper tube on the shaft at position 1
Since it is, Ru can efficiently be greatly increase the cutting amount of processing increases.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing the entire configuration of a paper tube cutting device according to an embodiment of the present invention.

FIG. 2 is a side view schematically showing the entirety of the paper tube cutting device according to one embodiment of the present invention.

FIG. 3 is a front view showing a first position of a shaft in the paper tube cutting device according to one embodiment of the present invention.

FIG. 4 is a side view showing a first position and a second position of a shaft in the paper tube cutting device according to one embodiment of the present invention.

FIG. 5 is a left side view of the insertion device.

FIG. 6 is a plan view showing a second position of a shaft in the paper tube cutting device according to one embodiment of the present invention.

FIG. 7 is an operation explanatory view of the paper tube cutting device according to one embodiment of the present invention.

[Explanation of symbols]

 1 shaft 2 cutting blade 3 stopper 4 original paper core 5 paper core

Claims (1)

(57) [Claims] 1. The original paper core is held while being inserted into the original paper core.
A plurality of axes of which can be timely rotatably driven by, before
A plurality of axes are cantilevered at predetermined intervals parallel to each other, and
Each axis is sequentially positioned at least in a first position and a second position
A turret that can be attached, and
Adjacent to the shaft at the free end side of the shaft and
Insert the original paper tube around the shaft, extending parallel to the axial direction
And an original paper tube in the insertion device.
Means for feeding out one by one, and on the shaft at the second position
A second cutting blade for cutting the paper tube to the required length, the second switching
Means for removing the paper tube cut by the cutting blade from the shaft.
A paper tube cutting device comprising:
A shaft shorter than the original paper tube and a shaft attached to the first position;
The original paper tube at a predetermined position on the outer periphery of the shaft near the tip of
A first cutting blade capable of being inserted by the insertion device.
From the tip of the original paper tube to be cut by the first cutting blade.
The length at is equal to one or more cutting paper tubes of the required length.
A stopper for positioning the leading end of the original paper tube , and a front end of the original paper tube cut by the first cutting blade.
A paper tube cutting device , comprising: a removal device that removes a portion protruding from the shaft from the shaft .