JPS6213256B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll paper manufacturing device for manufacturing small-diameter roll paper, such as for toilet paper, from a large-diameter roll of base paper. Immediately after the unreeled base paper is wound around a core by a predetermined length in a winding device driven in conjunction with the base paper unwinding device to form a paper roll, the brake device is actuated to stop the base paper unwinding device and the winding device. The present invention relates to a roll paper manufacturing apparatus in which a take-up device is stopped at the same time, and after the paper roll is taken out from the take-up device portion, the base paper is cut to manufacture roll paper.

In this type of roll paper manufacturing equipment, the time (braking time) from when the brake device starts operating to stop the base paper feeder and winder until the base paper feeder and winder completely stop is It is desirable that the braking time be constant at all times, and if the braking time changes, the length of the base paper fed out and the length of winding onto the paper roll will change, resulting in variations in the length of the product (roll paper).

However, in conventional general roll paper manufacturing equipment, the braking torque of the brake device is set constant, so as the diameter of the base paper roll changes, the braking time of the base paper feeding device and winding device increases. This caused variations in the length of manufactured products. That is, when the base paper roll has a large diameter, the rotational inertia of the base paper roll becomes large, and as the diameter of the base paper roll becomes small, the rotational inertia of the base paper roll decreases. The smaller the diameter of the roll, the shorter the braking time, resulting in variations in the length of feed and winding of the base paper. In addition, when manufacturing roll paper for toilet paper (standard length is 55 m) using roll paper manufacturing equipment with a constant brake torque, when the diameter of the base paper roll is the maximum (for example, 1500 mm in diameter) There is a difference of about 5% (2 to 3 m in length) in product length from the minimum (for example, 100 mm in diameter).

In addition, some conventional roll paper manufacturing equipment of this type is equipped with a brake torque adjustment device that can change the brake torque according to changes in the diameter of the base paper roll. There is a system in which the braking time can be adjusted by visually measuring and manually adjusting the scale of the brake torque adjusting device at any time, or by so-called "gut feeling." In conventional roll paper manufacturing equipment, adjusting the brake torque required manual labor and the scale adjustment was done by ``gut feeling'', so the adjustment was likely to be inaccurate, and sometimes people forgot to adjust the brake torque. Sometimes.

In view of the problems of the conventional roll paper manufacturing apparatus as described above, the present invention automatically changes the brake torque according to the change in the diameter of the base paper roll, and has the advantage of automatically changing the brake torque from the start of operation of the brake device to the time when the base paper is fed out. The purpose is to always keep the time until the winding action completely stops (braking time) constant, and in a roll paper manufacturing apparatus having the basic configuration as shown in the header, the loading of the base paper roll is A base paper roll diameter detection device for detecting the diameter of the base paper roll is provided on the side, and upon receiving a signal from the base paper roll diameter detection device, the diameter of the base paper roll gradually decreases from a large diameter to a small diameter. The present invention is characterized in that a brake torque adjusting device is provided which acts to gradually reduce the brake torque of the brake device as the brake torque increases.

Hereinafter, the roll paper manufacturing apparatus of the present invention will be explained with reference to the embodiments shown in FIGS. 1 to 3. The roll paper manufacturing apparatus of the illustrated embodiment feeds out the base paper P from the base paper roll 1 at a constant speed. a winding device 3 for winding the base paper P fed from the base paper roll 1 around the outer periphery of the core 8 to form a paper roll 9; and a portion of the winding device 3. A brake device 13 for suddenly stopping the base paper feeding device 2 and the winding device 3 at the same time immediately after winding up the base paper P by a predetermined length, and a paper roll body 9 formed by the winding device 3 are connected to the base paper. P
and a gluing device 5 for gluing the cut end of the paper roll 9 to the outer surface of the paper roll 9. A base paper roll diameter detection device 16 is provided for detecting the size of the base paper roll diameter, and in response to a signal from the base paper roll diameter detection device 16, the braking device 13 is operated as the diameter of the base paper roll 1 gradually decreases from the large diameter. A brake torque adjusting device 17 is provided which acts to gradually reduce the brake torque.

The base paper roll 1 is freely installed between two frames 20, 20.

The paper feeding device 2 and the winding device 3 are driven intermittently and synchronously with each other by a single motor 11 and clutch device 12.
That is, the power from the motor 11 is transmitted to the clutch device 12 by the belt 21, and further from the clutch device 12 to the first rotating shaft 23 by the belt 22, and from the first rotating shaft 23 to the belt 24. Therefore, while being sequentially transmitted to the second rotating shaft 25,
Transmission is simultaneously made from the second rotation shaft 25 to the base paper feeding device 2 side by a belt 26 and to the winding device 3 side by a belt 27, and the first rotation is caused by the connection and disconnection of the clutch device 12. The drive mechanism after the shaft 23 is driven intermittently.

In this embodiment, the base paper feeding device 2 is of a band belt drive type, and one unit is provided near each end of the base paper roll 1. This base paper feeding device 2 has a driving pulley 33 fixed to a rotating shaft 31 installed between both frames 20, 20 in the vicinity of the base paper roll 1, and a driving pulley 33 that is free and swingable with respect to the rotating shaft 31. A driven pulley 34 is pivotally supported by the tip 32b of the freely attached rocking arm 32, and a belt-shaped endless belt 35 is installed between the pulleys 33 and 34, and the rocking arm 32 is directed toward the center of the base paper roll 1. The running surface of the endless belt 35 is pressed against the outer circumferential surface of the base paper roll 1 by urging the endless belt 35.

The rotating shaft 31 of the base paper feeding device 2 is connected to the second rotating shaft 25 by a belt 26, and
It is adapted to rotate in synchronization with the rotating shaft 25.

The rocking arm 32 is composed of a pair of two same-shaped elongated plates 36, 36. The rocking arm 32 has its base (lower portion) 32a attached to the rotating shaft 31 via a bearing 37. Further, the rocking arm 32 is configured such that the tip end of the rocking arm 32 is urged toward the center of the base paper roll 1 about the rotation shaft 31 by an air cylinder 38.

The endless belt 35 of this paper feeder 2 is designed to run in the direction of arrow A (FIGS. 1 and 3), and therefore, when the paper feeder 2 is driven, the paper roll 1 is moved in the direction of arrow B. It is rotated so that the base paper P is continuously fed out.

The leading end of the base paper P fed out from the base paper roll 1 is guided to the upper part of the winding device 3 via each paper passing roll (40 to 44).

The winding device 3 includes two winding rolls 28 and 29.
The two take-up rolls 28, 2 are rotated in the same direction while being brought close to each other.
A presser roll 30 is provided above the space formed above the spaces 9 and 9. The winding core 8 is supplied one by one from the outlet of a winding core hopper (not shown) into the upper space between the two winding rolls 28 and 29.

The paper winding speed of the winding device 3 is set to be the same as the paper feeding speed of the paper feeding device 2, and since the winding device 3 and the paper feeding device 2 are driven and stopped synchronously, The amount of base paper wound up (length) and the amount of base paper fed out (length) each time are made to be the same. And in this example,
In order to measure the winding length of the base paper in the winding device 3 section, the rotary shaft 31 is connected to the rotating shaft 31 of the base paper feeding device 2.
Counter device 18 for measuring the number of rotations of 1
is provided, and the base paper feeding length (same as the base paper winding length) is measured based on the count number of the counter device 18. Note that when the rotating shaft 31 rotates once, the endless belt 35 is caused to run by a length equivalent to one rotation of the outer peripheral surface of the driving pulley 33, and thereby the base paper P of the same length is fed out from the base paper roll 1. Therefore, by measuring the number of rotations of the rotary shaft 31, the length of the unreeled paper can be measured.

This counter device 18 is configured to emit a signal at a count number (for example, 280 counts) corresponding to a predetermined paper feed length (for example, 55 m for toilet paper). A signal (signal line It is designed to act so as to suddenly stop the driving portions after the device 13 (including the base paper feeding device 2 and the winding device 3).

When the driving part after the brake device 13 stops, the presser roll 30 of the winding device 3 moves upward, and then the paper roll 9 grown on the two winding rolls 28 and 29 is rolled up. An extrusion device (not shown) extrudes it toward the wound body support portion 6 on the exit side.

A cutting device 4 and a gluing device 5 are arranged in parallel above the winding device 3 and the winding body supporting portion 6 on the exit side of the cutting device 4. As shown in , the cutting device 4 cuts the base paper P after it has been pushed out toward the roll supporting portion 6 , and at the same time, the gluing device 5 acts to apply glue to the vicinity of the cut end of the base paper P on the roll body side. Note that once the gluing is completed near the cut end, the two rolls 6a and 6b of the wound body support section 6 are removed.
rotates, and the glued end of the base paper is adhered to the outer surface of the roll 9, completing the production of the roll paper.

The production of the roll paper is completed as described above, and the next core is supplied to the space between the two winding rolls 28 and 29 of the winding device 3, and the cut end of the base paper is wound around the core. After the presser roll 30 moves downward,
When the clutch device 12 is connected, the base paper feeding device 2 and the winding device 3 are driven, and the winding operation of the base paper is started.

In this embodiment, the base paper roll diameter detection device 16 is provided on the rocking arm 32 of the base paper feeding device 2, and utilizes the fact that the inclination angle of the rocking arm 32 becomes smaller as the diameter of the base paper roll 1 becomes smaller. death,
By detecting the inclination angle of the rocking arm 32, the diameter of the base paper roll 1 can be detected. That is, this base paper roll diameter detection device 16 is
An arcuate gear 51 is attached to the outer surface of one rocking arm 32, and a circular gear 52 is attached to the arcuate gear 51.
The diameter of the base paper roll can be detected by the indicated position of a pointer 53 attached to the shaft of the circular gear 52.

A brake torque adjustment device 17 is installed near the base paper roll diameter detection device 16. This brake torque adjustment device 17 receives a signal from the base paper roll diameter detection device 16 and increases the brake torque when the base paper roll diameter detection value (indicated position of the pointer 52) of the base paper roll diameter detection device 16 is large, It acts to reduce the brake torque as the detected value of the base paper roll diameter gradually decreases. The brake torque adjustment device 17 is capable of steplessly adjusting the brake torque in accordance with the detected value of the base paper roll diameter detection device 16. The magnitude of the brake torque of the brake torque adjusting device 17 is transmitted to the brake device 13 through a signal line Y, and when the brake device 13 is operated, it is operated with the brake torque.

As the detection device 16 for detecting the diameter of the base paper roll 1, in addition to the method of detecting the inclination angle of the rocking arm 32 as in the above embodiment, an optical means such as a photo sensor may be used. It is possible to employ an appropriate structure such as one that utilizes this to directly detect the position of the outer circumferential surface of the base paper roll.

Next, to explain in more detail the action of the braking mechanism in the illustrated roll paper manufacturing apparatus, when the base paper P is fed out from the base paper roll 1 by a predetermined length and a stop signal is issued from the counter device 18, the signal (signal line ), the brake device 13 is actuated at the same time as the clutch device 12 is disengaged, and the drive mechanism after the brake device 13 (including the paper feeding device 2 and the winding device 3) is brought to a sudden stop. Note that during braking, when the base paper roll 1 has a large diameter (for example, diameter L), its rotational inertia is large;
Conversely, when the diameter is small (for example, diameter 1), the rotational inertia is small, and therefore, depending on the diameter of the base paper roll 1, the force acting on the base paper feeding device 2 (which causes the endless belt 35 to run in the direction of arrow A) In other words, it acts to make the braking time different. However, the brake device 13 uses a brake torque adjustment device 17 to increase the brake torque when the rotational inertia is large, corresponding to the diameter of the base paper roll 1, that is, the rotational inertia at the time of braking. When the rotational inertia force is small, the braking torque is automatically adjusted to be small, so that the braking time is kept constant.

Next, to explain the effects of the present invention, the roll paper manufacturing apparatus of the present invention includes a base paper roll diameter detection device 1 for detecting the size of the diameter of the base paper roll 1.
6, and a brake torque adjusting device 17 which receives a signal from the base paper roll diameter detection device 16 and operates to automatically gradually reduce the brake torque of the brake device 13 as the diameter of the base paper roll 1 gradually decreases. Therefore, even if the diameter of the base paper roll 1 changes and the magnitude of the rotational inertia during braking changes, the braking torque of the braking device 13 is automatically adjusted in response to the change. Since the braking time of the brake device 13 can always be kept constant regardless of the size of the diameter of the base paper roll, there is an effect that there is no variation in the length of the product (roll paper).

[Brief explanation of the drawing]

1 is a schematic side view of a roll paper manufacturing apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of the roll paper manufacturing apparatus shown in FIG. 1, and FIG. 3 is an illustration of the roll paper manufacturing apparatus shown in FIG. 1. FIG. 1...Base paper roll, 2...Base paper feeding device, 3
... Winding device, 8 ... Winding core, 9 ... Paper winding body, 13 ... Brake device, 16 ... Base paper roll diameter detection device, 17 ... Brake torque adjustment device.

Claims (1)

[Claims] 1. The base paper P fed from the base paper roll 1 by the base paper feed-out device 2 is wound around the core 8 by a predetermined length by the winding device 3 portion driven in conjunction with the base paper feed-out device 2 to wind the paper. Immediately after forming the paper roll 9, the brake device 13 is actuated to stop the base paper feeding device 2 and the winding device 3 at the same time, and after the paper roll 9 is taken out from the winding device 3, the This is a roll paper manufacturing apparatus that cuts base paper P to manufacture roll paper, and includes a base paper roll diameter detection device 16 on the mounting side of the base paper roll 1 for detecting the diameter of the base paper roll 1. and a brake torque that receives a signal from the base paper roll diameter detection device 16 and acts to gradually reduce the brake torque of the brake device 13 as the diameter of the base paper roll 1 gradually decreases from a large diameter to a small diameter. A roll paper manufacturing apparatus characterized in that an adjustment device 17 is provided.