JP3363182B2 - Shaping method and shaping device for toilet paper roll - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaping method and a shaping device for continuously shaping a hollow portion at the center of a toilet paper roll.

[0002]

2. Description of the Related Art Toilet paper rolls include those having a hollow portion formed by a paper tube on the inner circumference thereof and those having a hollow portion formed by the inner circumference of a paper winding layer without depending on the paper tube. is there. With any of these toilet paper rolls, a wide width toilet paper base paper is wound up to a predetermined length such as 65 m to form a log roll, and the log roll is then cut by a log cutting machine into a large number of toilet paper rolls having a predetermined axial length. In the case of manufacturing by cutting into round slices at the same time, the circular shape of the hollow portion is unsightly crushed and distorted due to the pressing force of the blade that cuts the log roll into slices.

[0003]

As described above, when the hollow part of the toilet paper roll is distorted, the appearance is damaged and the commercial value is lowered. Moreover, the shaft of the holder is inserted into the hollow part to form a holder. When installing, it may be difficult to insert the shaft. For this reason, in the past, if the degree of crushing is large, a thin rod is inserted into the hollow part and manually shaped to make it into a shape close to a circle, but that is very time-consuming and inefficient. .

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above, and a method of shaping a toilet paper roll according to claim 1 is a toilet paper roll having a hollow portion at its center, and the hollow portion is directed in a conveying direction. The toilet paper roll is conveyed in a state of being orthogonal to each other, and the shaping core disposed at a position facing one opening of the hollow portion of the toilet paper roll to be conveyed is advanced to move the tip of the shaping core to the hollow of the toilet paper roll. Part of the opening of the toilet paper roll is retracted and then retracted to shape one opening, and a shaping core disposed at a position facing the other opening of the hollow portion of the toilet paper roll to be conveyed is advanced. The tip of the shaping core is once intruded into the other opening of the hollow portion of the toilet paper roll and then retracted to shape the other opening. The toilet paper roll shaping device according to claim 2 further comprises a transport mechanism for transporting the toilet paper roll having a hollow portion at the center at a predetermined interval in an aligned state in which the hollow portions are oriented in a direction orthogonal to the transport direction. A first shaping core row arranged at a position facing one opening of the hollow portion of the toilet paper roll conveyed by the conveying device, and connecting the shaping cores fitted to the central portion at the predetermined intervals, With the tip of the shaping core facing the transport mechanism, the first drive mechanism that moves the shaping core in synchronization with the transport speed of the transport mechanism and the shaping core that moves in a predetermined shaping region are advanced to the transport mechanism side. The tip of the shaping core is introduced into one opening of the hollow portion of the toilet paper roll, and is conveyed by the first pressing mechanism that retracts the advancing shaping core when passing through the shaping region, and the transport mechanism. A second shaping core row, which is arranged at a position facing the other opening of the hollow portion of the illette paper roll, and in which the shaping cores fitted into the hollow portion are connected at the predetermined intervals, and the leading end of the shaping core is a transport mechanism. A second drive mechanism that moves the shaping core in synchronization with the transport speed of the transport mechanism in the state of being directed to the transport mechanism, and a shaping core that moves in a predetermined shaping region toward the transport mechanism side to move the tip of the shaping core to the toilet paper. And a second pressing mechanism that is inserted into the other opening of the hollow portion of the roll and retracts the advancing shaping core when passing through the shaping region.

[0005]

When the transport mechanism transports the toilet paper rolls at a predetermined interval in an aligned state with the hollow portions oriented in the direction orthogonal to the transport direction, the first drive is performed at the same speed as the transport speed of the toilet paper rolls. The shaping core of the first shaping core row moves by the operation of the mechanism, and the shaping core of the second shaping core row moves by the actuation of the first driving mechanism, and these shaping cores move to the shaping region to move to the first shaping core. By the operation of the pressing mechanism, the first shaping core advances and the tip is made to enter into one opening of the hollow portion of the toilet paper roll for shaping, and by the operation of the second pressing mechanism, the second shaping core advances and the tip is moved. The toilet paper roll is shaped by being inserted into the other opening of the hollow portion. Then, when passing through the shaping region, the shaping core that has entered the opening of the hollow portion of the toilet paper roll retracts by the operation of the first and second pressing mechanisms, and the tip is pulled out from the hollow portion. Therefore, the crushed opening of the hollow portion is shaped into a predetermined shape by the entry and withdrawal of the tip of the shaping core.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a belt conveyor provided as a transport mechanism, and toilet paper rolls 3 having a hollow portion 2 at the center are arranged on the belt 1'in a state in which the hollow portions 2 are vertically aligned at predetermined intervals. And transfer it from the left side to the right side in the figure. The belt 1'of the belt conveyor 1 includes a drive drum 4 provided at the end, an idle drum 5 provided at the start,
The idle drums 6 and 6 are provided below the drums 4 and 5, and as shown in FIG. 2, holes 7 ... Are opened at predetermined intervals in the approximate center in the width direction, and the holes 7 are surrounded by the holes 7. A ring-shaped positioning member 8 on which the toilet paper roll 3 is placed in alignment with the center of the hole 7 is provided on the upper surface of the. The belt 1'has, on its back surface, ridges 9 ... Which are fitted in the axial grooves formed on the peripheral surface of the drive drum 4, and the rotation of the drive drum 4 causes the rotation speed of the drum 4 to vary. Rotate at a predetermined speed.

If a motor capable of electrically controlling the speed, such as a pulse motor, is used as the drive source for the drive drum 4, the rotational speed of the drive drum 4 can be electrically controlled accurately. Therefore, when the rotation speed of the drive drum 4 is controlled by the control device having a microcomputer,
The transport speed of the toilet paper roll 3 can be adjusted accurately.

A first shaping core row 11 in which a plurality of shaping cores 10 for shaping the hollow portion 2 of the toilet paper roll 3 are connected above the belt conveyor 1 having such a structure.
And a first drive mechanism for moving the shaping cores 10 ... In synchronism with the conveying speed of the belt conveyor 1, and a first pressing mechanism for pushing the shaping cores 10 into one opening of the hollow portion 2 of the toilet paper roll 3. And a plurality of shaping cores 10 for shaping the hollow portion 2 of the toilet paper roll 3 are connected below the belt conveyor 1 to form a second shaping core row 12
And a second drive mechanism for moving the shaping cores 10 ... In synchronism with the conveyance speed of the belt conveyor 1, and a second pressing mechanism for pushing the shaping cores 10 into the other opening of the hollow portion 2 of the toilet paper roll 3. And.

In the first shaping core row 11, the first idle sprocket 13 provided above the start end side of the belt conveyor 1 and the first drive sprocket 14 provided above the end side of the belt conveyor 1 are hooked with the first chain 15. Hand over this chain 15
, A plurality of shaping cores 10 are attached at the same intervals as the predetermined intervals of the toilet paper rolls 3 on the belt conveyor 1.

The shaping core 10 has a shell-shaped shaping portion 17 at the tip of a shaft portion 16 and a roller 18 as a cam follower at the rear end.
Inserting the middle of the shaft portion 16 into the tubular support portion 19 with the shaping portion 17 facing the belt conveyor 1 side when the shaping portion 17 is moved to the outside, that is, the lower side. Is attached to the chain 15 and is urged by the spring 20 wound around the shaft portion 16 in the direction of retracting the shaping portion 17. In addition, the shaping part 17 is formed so as to gradually become thinner from the base end toward the tip so that it can easily enter the hollow part 2 of the toilet paper roll 3, and the maximum diameter part slightly closer to the tip from the base end. The outer diameter of the hollow portion 2 is set to be slightly larger than the predetermined inner diameter of the hollow portion 2 so that the hollow portion 2 that has been crushed is slightly expanded to form a circular shape and suppress so-called springback, so that the hollow portion 2 can be pulled out. I try not to damage the paper.

The first drive mechanism for moving the shaping core row 11 having such a structure is the first idle sprocket 1 described above.
3, a first drive sprocket 14, a drive source 21 for rotationally driving the first drive sprocket 14, and the like. When a motor such as a pulse motor whose speed can be electrically controlled is used as the drive source 21, the rotational speed of the first drive sprocket 14 can be electrically and accurately controlled. Therefore, if the rotation speed of the first drive sprocket 14 is controlled by the control device having a microcomputer configuration, it can be accurately adjusted to the speed of the belt conveyor 1, that is, the transportation speed of the toilet paper rolls 3.

In the first pressing mechanism, when the shaping cores 10 ... Which move due to the operation of the first drive mechanism arrive at a predetermined shaping region, the shaping cores 10 are advanced toward the toilet paper roll 3 side on the belt conveyor 1 and shaped. The shaping part 17 of the core 10 is caused to enter one opening of the hollow part 2 of the toilet paper roll 3, and when the shaping region is passed, the shaping core 10 which is advancing is retracted to move the shaping part 17 from the hollow part 2. The first cam 2 in the embodiment shown in FIG.
It is composed of two. As shown in FIG. 1, the first cam 22 has a substantially oval shape that is long in the lateral direction, and a first pressing operation portion 23 is formed by projecting a part of the lower side downward with a gentle curve. . The first pressing operation unit 23
Is arranged in conformity with the shaping region for shaping the hollow portion 2 of the toilet paper roll 3, and the height difference between the inclined start end and the inclined end is the stroke of the shaping core 10. The size is set so that it can descend from above the paper roll 3 and penetrate into the hollow portion 2 to a sufficient depth.

When each shaping core 10 moves at the same speed as the conveyance speed of the toilet paper roll 3 in a state where the roller 18 is in contact with the peripheral surface of the first cam 22 having the above-mentioned structure, the left arc of the first cam 22 is moved. The shaping core 10 descending while abutting the roller 18 on the portion gradually descends while reversing in the direction in which the shaping portion 17 at the tip is directed downward, and when passing through the arc portion, the shaping portion 17 is directed directly below. In front of the first pressing operation unit 23, the roller 18 of the shaping core 10 moves due to the urging force of the spring 20 while being in contact with the first cam 22, and in this state, the shaping unit 17 at the tip (lower end in the drawing).
Is separated from the upper end of the toilet paper roll 3. When the roller 18 of the shaping core 10 comes into contact with the descending inclined side of the first pressing operation unit 23 by further moving, the shaping unit 17 at the tip gradually descends according to the moving length, and the toilet paper roll 3 Approaching, and further shaping core 1
When 0 moves, the shaping unit 17 enters the upper opening of the hollow portion 2 of the toilet paper roll 3 to start shaping, and
By the time the roller 18 comes into contact with the downwardly inclined end of the pressing motion unit 23, the shaping unit 17 penetrates into the hollow part 2 of the toilet paper roll 3 to a sufficient depth, and the roller 18 moves toward the lower end side of the first pressing motion unit 23. While moving while abutting against the, the tip end stays inside the hollow portion 2 for reliable shaping, and the roller 18 moves to the first position.
When the pressing core 23 moves while coming into contact with the ascending slope of the pressing portion 23, the shaping core 10 is gradually retracted due to the bias of the spring 20.
That is, the shaping section 17 rises and the shaping section 17 is completely pulled out from the hollow section 2 when it passes through the first pressing operation section 23. Therefore, when the toilet paper roll 3 in which the upper opening of the hollow portion 2 is crushed is placed on the starting end of the belt conveyor 1 and conveyed, the shaping part 17 of the shaping core 10 is crushed while passing through the shaping region. It penetrates into the opening and is shaped into a round opening.

When the shaping core 10 is retracted and the shaping section 17 at the tip is pulled out from the hollow portion 2 of the toilet paper roll 3, there is a risk that the pulling resistance causes the toilet paper roll 3 to be lifted. Therefore, in the present embodiment, a pair of left and right restraint plates 24, 24 are arranged above the belt conveyor 1 along the conveying direction, and the restraint plates 24, 24 suppress the rise of the toilet paper roll 3. The shaping core 10 is the left and right restraining plates 2
Since it passes between 4 and 24, there is no hindrance to the movement.

The shaping core 10 that has passed through the first pressing operation portion 23 ascends while reversing along the right circular arc portion of the first cam 22 and moves along the upper side of the first cam 22. Then, when descending from the left arc portion again, as described above, the upper opening portion of the hollow portion 2 of the toilet paper roll 3 is shaped when passing through the first pressing operation portion 23.

Next, the respective mechanisms provided below the belt conveyor 1 will be described. The second shaping core row 12 includes the second idle sprocket 25 provided below the starting end side of the belt conveyor 1 and the end side of the belt conveyor 1. A second chain 27 is wound around a second drive sprocket 26 provided below, and a plurality of shaping cores 10 ... Are attached to the chain 27 at the same intervals as the predetermined intervals of the toilet paper rolls 3 on the belt conveyor 1. The shaping core 10 has the same structure as that of the first shaping core row 11.

The second drive mechanism for moving the second shaping core row 12 having such a structure rotationally drives the second idle sprocket 25, the second drive sprocket 26, and the second drive sprocket 26. It is composed of a drive source 28 and the like. When a motor capable of electrically controlling the speed such as a pulse motor is used as the drive source 28, the rotational speed of the second drive sprocket 26 can be electrically controlled accurately. Therefore, when the rotation speed of the second drive sprocket 26 is controlled by the controller, it can be accurately adjusted to the speed of the belt conveyor 1, that is, the transportation speed of the toilet paper roll 3.

In the second pressing mechanism, when the shaping cores 10 ... Which are moved by the operation of the second drive mechanism reach a predetermined shaping region, the shaping cores 10 are advanced to the toilet paper roll 3 side on the belt conveyor 1 and shaped. The shaping part 17 of the wick 10 is caused to enter the other opening of the hollow part 2 of the toilet paper roll 3, and when passing through the shaping region, the shaping core 10 moving forward is retracted to move the shaping part 17 from the hollow part 2. The second cam 2 in the embodiment shown in FIG.
It is composed of 9. As shown in FIG. 1, the second cam 29 has a substantially oval shape that is symmetrical to the first cam 22 and is long in the lateral direction. The operation unit 30 is formed. The second pressing operation unit 30 is arranged at a position overlapping the shaping region or the first pressing operation unit 23, and the height difference between the inclined start end and the end is similar to that of the first pressing operation unit 23. ,
Since the stroke of the shaping core 10 is achieved, the shaping part 17 of the shaping core 10 is set to a size that allows it to rise from below the toilet paper roll 3 and penetrate into the hollow portion 2 to a sufficient depth.

When each shaping core 10 moves at the same speed as the conveyance speed of the toilet paper roll 3 in a state where the roller 18 is in contact with the peripheral surface of the second cam 29 having the above structure, the left side of the second cam 29 is moved. The shaping core 10 rising while abutting the roller 18 on the arcuate portion gradually increases the shaping portion 1 at the tip.
7 rises while reversing in the direction in which 7 is turned up, and when passing through the arc portion, the shaping section 17 is turned right up. In front of the second pressing operation unit 30, the roller 18 of the shaping core 10 moves in contact with the second cam 29 by the bias of the spring 20, and in this state, the shaping unit 17 at the tip (upper end in the figure). Are separated from the belt of the belt conveyor 1. And
When the roller 18 of the shaping core 10 comes into contact with the ascending slope of the second pressing operation unit 30 by further movement, the shaping unit 17 at the tip gradually approaches the belt 1'according to the moved length, and further shaping is performed. When the core 10 moves, the shaping section 17 penetrates through the hole 7 of the belt 1'and enters the lower opening of the hollow portion 2 of the toilet paper roll 3 to start shaping, and to the upper end of the slope of the second pressing operation section 30. By the time the roller 18 comes into contact, the shaping part 17 penetrates into the hollow part 2 of the toilet paper roll 3 to a sufficient depth, and the roller 18 moves to the second pressing operation part 30.
While moving while contacting the upper end of the
When the roller 18 moves while abutting on the descending inclined side of the second pressing operation portion 30, the shaping core 10 gradually retracts, that is, descends by the bias of the spring 20, and the second pressing operation is performed. By the time it passes through the working part 30, the shaping part 17 is completely pulled out from the hollow part 2 and separated from the belt 1 '. Therefore, when the toilet paper roll 3 in which the lower opening of the hollow portion 2 is crushed is placed on the starting end of the belt conveyor 1 and conveyed, the shaping portion 17 of the shaping core 10 passes through the second pressing operation portion 30. Penetrates into the crushed lower opening and is shaped into a round opening.

The shaping core 10 that has passed through the second pressing portion 30.
Moves down while reversing along the right-hand circular arc portion of the second cam 29. Then, when rising from the left arc part again,
Similarly to the above, the lower opening of the hollow portion 2 of the toilet paper roll 3 is shaped when passing through the second pressing operation unit 30.

In the above embodiment, the belt conveyor 1, the first and second shaping core rows 11 and 12, the first and second shaping core rows are used.
The drive mechanism may be connected by a mechanical transmission means such as a chain or a gear train to tune the speed, or may be electrically tuned by using a pulse motor or the like as a drive source. In any case, the position of the hole 7 of the belt 1'of the belt conveyor 1, the first and second shaping core rows 11, 12
The positions of the shaping cores 10 ... need to be adjusted in advance so that the shaping cores 10 enter the opening of the hollow portion 2 of the toilet paper roll 3 when the shaping core 10 advances.

In the above-described embodiment, the toilet paper rolls 3 are conveyed at a predetermined interval with the hollow portion 2 oriented vertically, and the first shaping core is provided above the belt conveyor 1 facing the upper opening of the hollow portion 2. A second shaping core row 12 and a second drive mechanism are provided below the belt conveyor 1 facing the lower opening of the hollow portion 2 of the toilet paper roll 3 by arranging the row 11, the first drive mechanism, and the first pressing mechanism. , And the second pressing mechanism are provided, the present invention is not limited to such an arrangement.

The transport mechanism is a toilet paper roll 3
It suffices that the hollow portion 2 can be conveyed in a state of being oriented in a direction orthogonal to the conveying direction. The first shaping core row 11 faces the one opening of the hollow portion 2 of the toilet paper roll 3 transported by the transport mechanism, and the second shaping core row 12 faces the other opening of the hollow portion 2. It may be arranged at each position. Further, the first and second drive mechanisms only have to move the shaping core 10 in synchronization with the transport speed of the transport mechanism with the tip of the shaping core 10 facing the transport mechanism. In addition, the first and second pressing mechanisms advance the shaping core 10 moving in the shaping region toward the transport mechanism side to cause the tip of the shaping core 10 to enter the opening of the hollow portion 2 of the toilet paper roll 3 to form the shaping region. It is sufficient if the shaping core 10 can be retracted when the cormorant passes through.

For example, the hollow part 2 of the toilet paper roll 3 may be conveyed in a state in which it is turned sideways.
In this case, the first shaping core row 11, the first drive mechanism, and the first pressing mechanism are arranged on one side (for example, the left side) of the belt conveyor 1 when FIG. The second shaping core row 12, the second drive mechanism, and the second pressing mechanism are arranged on the right side. And toilet paper roll 3
The toilet paper roll 3 is provided on the upper surface of the belt conveyor 1 as shown in FIG. A holder 31, which holds it in place,
31 is provided. In addition, it is desirable to provide stoppers 32, 32 on both sides so that the toilet paper roll 3 is not laterally displaced when the shaping part 17 of the shaping core 10 comes out of the hollow part 2.

Further, the conveying mechanism is not limited to the belt conveyer 1, and the toilet paper rolls 3 can be conveyed at a predetermined interval with the hollow portions 2 oriented in a direction orthogonal to the conveying direction. Any configuration may be used as long as the toilet paper roll 3 is 1
You may comprise so that the bucket which accommodates individual pieces may be connected and this bucket row may be moved.

Further, the row of shaping cores 10 is not limited to the above-mentioned embodiment in which a plurality of shaping cores 10 are attached to the chain, and the shaping cores 10 fitted in the hollow portion 2 of the toilet paper roll 3 are predetermined. Anything connected at intervals may be used. For example, the shaping core 10 may be attached to the endless wire at predetermined intervals.

Further, the pressing mechanism is not limited to the above-mentioned cam, but the shaping core 10 moving in a predetermined shaping region is advanced to the conveying mechanism side so that the tip of the shaping core 10 is one of the hollow portions 2 of the toilet paper roll 3. Any structure may be used as long as it has a function of causing the shaping core 10 that advances when it passes through the shaping region to enter into the opening of the. For example,
The shaping core 10 may be pushed out or pulled back toward the transport mechanism side by driving the solenoid.

[0028]

As described above, according to the present invention, the hollow portion of the toilet paper roll which has been deformed into a warp on the inner periphery can be automatically and continuously shaped into a circular shape during transportation, which has been conventionally done manually. The work being done can be saved.

[Brief description of drawings]

FIG. 1 is a front view showing a schematic configuration of a shaping device.

FIG. 2 is a cross-sectional view of the toilet paper roll in a state where the tip of the shaping core has entered the hollow portion.

FIG. 3 is a perspective view of an embodiment in which a toilet paper roll is conveyed in a lying state.

[Explanation of symbols]

1 Belt Conveyor as Conveying Device 2 Hollow Portion of Toilet Paper Roll 3 Toilet Paper Roll 7 Hole Opened in Belt 10 Shaping Core 11 First Shaping Core Row 12 Second Shaping Core Row 15 First Chain 17 Formed at Tip of Shaping Core Shaping part 18 Roller 19 as a cam follower 19 Shaping core support 22 First cam 23 as first pressing mechanism 23 First pressing operation part 29 for advancing the shaping core to the toilet paper roll side Second cam 2 as second pressing mechanism 30 Second pressing operation unit

Claims (2)

(57) [Claims] 1. A toilet paper roll having a hollow portion at the center is conveyed in a state where the hollow portion is oriented in a direction orthogonal to the conveying direction, and faces one opening of the hollow portion of the conveyed toilet paper roll. The shaping core disposed at the position is moved forward so that the tip of the shaping core is once intruded into one opening of the hollow portion of the toilet paper roll, and then retracted to shape one opening, and the toilet is transported. The shaping core provided at a position facing the other opening of the hollow portion of the paper roll is advanced to cause the tip of the shaping core to once enter the other opening of the hollow portion of the toilet paper roll, and then retracted to the other side. A method of shaping a toilet paper roll, which comprises shaping the opening of the toilet paper roll. 2. A transport mechanism for transporting toilet paper rolls having a hollow portion at the center at predetermined intervals in an aligned state in which the hollow portions are oriented in a direction orthogonal to the transport direction, and a toilet transported by the transport device. A first shaping core row arranged at a position facing one opening of the hollow portion of the paper roll and connecting the shaping cores fitted to the central portion at the predetermined intervals, and the tip of the shaping core is directed to the transport mechanism. In this state, the first drive mechanism that moves the shaping core in synchronization with the transport speed of the transport mechanism, and the shaping core that moves in a predetermined shaping region are advanced to the transport mechanism side so that the tip of the shaping core moves to the toilet paper roll. A first pressing mechanism that enters into one opening of the hollow portion and retracts the advancing shaping core when passing through the shaping region; and a hollow portion of the toilet paper roll conveyed by the conveying mechanism. Is disposed at a position facing the the opening, the second of the shaping core that fits into the hollow portion coupled at the predetermined intervals
A shaping core row, a second driving mechanism that moves the shaping core in synchronization with the transport speed of the transport mechanism with the tip of the shaping core facing the transport mechanism, and a shaping core that moves the shaping core in a predetermined shaping region. A second pressing mechanism that moves the shaping core forward by moving the tip of the shaping core forward into the other opening of the hollow part of the toilet paper roll, and retracts the shaping core moving forward when passing through the shaping region. A device for shaping toilet paper rolls.