JPS59167434A - Wind-up device for roll paper - Google Patents

Abstract

PURPOSE:To eliminate a core retainer device and to simplify constitution of a wind-up device, by a method wherein a difference in peripheral velocity between wind-up rollers positioned at the front and the rear causes holding action on a core which is fed in a spacing between the wind-up rollers, so that it is prevented from dropping. CONSTITUTION:A core 13 is fed in a spacing between two wind-up rollers 11 and 12 by means of a feeder, and the rear wind-up roller 12 is rotated at a higher speed than that of the front wind-up roller 11 through the working of a speed change mechanism. The core 13 is held between the front and rear wind- up rollers 11 and 12, and a paper 5 conveyed through a perforating mechanism 10 is wound around the core 13. In which case, a support roller 19 is raised to support the core 13 from below. Thereafter, after the paper 5 is wound by a given length around the core 13 located between the wind-up rollers 11 and 12, the support roller 19 is lowered, the core 13, around which the paper 5 is wound by the given length, is taken out of the space between the wind-up rollers 11 and 12.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a two-way roll of paper in which the core supplied within the interval between the winding rollers is held so as not to fall due to the difference in circumferential speed between the winding rollers arranged in parallel before and after the winding rollers. The present invention relates to a winding device.

In a winding device that feeds a core between take-up rollers and winds paper around the core while supporting the core from below with a roller, the receiver supports the roller when taking out the core after winding. must descend. Therefore, a support device is required to support the core to be wound next after the core is supplied to the space between the winding rollers. However, the provision of such a support device complicates the structure of the winding device and may cause malfunctions.

The present invention has been proposed in view of the above, and includes two winding rollers arranged one behind the other at an interval where the winding core passes through, and a winding core supply supplying the winding core to one core within the interval between the winding rollers. The supply port of the device is placed above the gap between the take-up rollers, and when the rollers rise, the core is supported from below and the paper is wound onto the core. When the finished winding core is taken out from the interval between the winding rolls, the lowering receiver is provided so that the rollers can move up and down, and a transmission mechanism is installed to rotate the rear winding roller at a higher speed than the front winding roller. The present invention aims to provide a paper winding device which is connected to a winding roller and prevents the winding core from falling from the gap between the winding rollers due to the difference in circumferential speed between the front winding roller and the rear winding roller. be.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on drawings of an embodiment in which the present invention is implemented as a toilet paper winding device.

As shown in FIG. 1, the winding device is provided with a base paper placement section 3 adjacent to a frame-like frame/ for rotatably placing paper in a rolled state, and at the end of the frame/. A feed belt mechanism that feeds out the base paper in contact with the outer peripheral surface of the paper container, and a paper S that is fed upward by the rotation of the feed belt mechanism.
A guide roller B is provided to guide the guide roller B in the lateral direction, and on the downstream side of the guide roller B, a fixed blade receiver 7 and a perforation row 29 having a perforation blade G attached to the outer peripheral surface are vertically opposed to each other. A perforation carving mechanism 10 is provided, and the perforation carving mechanism 10 is provided.
On the downstream side of the winding core, two horizontally long winding rollers //, /:1 are arranged one behind the other with an interval approximately equal to or slightly narrower than the outer diameter of the winding core /3. belt mechanism,
The perforated roller and the front take-up roll are each mechanically connected to a drive source (not shown) so that they rotate at the same feed speed. Further, both winding rollers ii and /J are equipped with a speed change mechanism that can rotate the rear winding roller /2 at a higher speed than the front winding roller // at a predetermined time.
Connect ll.

The transmission mechanism /4' shown in FIG.
/2', both speed change pulleys /6α, /Al)■
This is a continuously variable transmission in which a belt 15 is stretched, and the effective diameter of the gear pulley 1)/Aa is increased to a larger value, and the gear pulley attached to the rear winding roller is set to a larger effective diameter. A
By reducing the effective diameter of b, the rear take-up roller /l can be rotated at a higher speed than the front take-up roller /l. As the transmission mechanism/da, a cone type continuously variable transmission using a conical belt pulley or other known transmission mechanism can also be used.

S- Above the interval between the winding rollers // and /2, there is a supply port /g of the core supply device /7 that supplies the core /3 to one core within the interval.
Under the above-mentioned interval, a support supporting the winding core /3 supplied from the winding core supplying device 77 from below is provided so that the roller /9 can be moved up and down.

The core supply device shown in Fig. 1 has a large number of cores/3...
A storage box 20 for storing the storage box 2(7), a core take-out row 2.2 which takes out the core/3 one by one from the outlet I' of the storage box 2(7) and puts it into the groove 2/; A guide gutter 3 guides the winding core /3 taken out by rotation of the core take-out roller to the supply port l at the lower end; 3 is the take-up roller //.

A flat spring XS whose lower end is bent inward is provided at the supply port itr of the guide gutter a3. Therefore, when the core take-out roller 2 is rotated to feed the core 3 in the take-out groove 2 into the guide gutter 3, the core 3 flows down while rolling in the guide gutter 3, and is fed. It is caught on the bent part 3' of the flat spring 2g of mouth/g and waits. Then, the winding core /3 waiting at the supply port /g is sent out by the winding core delivery mechanism 21I within the interval of the winding roller //, /:1.

The core feeding mechanism 24Z feeds the empty roll waiting at the supply port /g immediately before the winding core /3 within the interval of the winding roller //, /l winds up a predetermined length of paper S. Any configuration may be used as long as the core/3 is forcibly sent out. The details of the winding core feeding mechanism shown in Fig. 1 are as follows: An upper sprocket t is provided coaxially with the rear winding roller 1 so that it can rotate independently of the latter, and is attached to the sprocket. A horizontally elongated receiving shaft 2g is provided at the tip of the arm rod 2g along the length direction of the rear winding roller /:l, and an endless belt is attached to the tip of an arm 2q extending forward from the middle of the receiving shaft 2g. 3θ is stretched in a triangular shape by small pulleys 3/..., the upper sprocket: lA and the lower sprocket 32 are connected by a chino 33, and the cam flow wharf 4' provided on the lower sprocket 32 is connected to the left circumference of the first cam 3. It comes into contact with the surface. Therefore, when the first cam 3S is rotated, the cam floor 3'l rotates the lower sprocket 32 counterclockwise in FIG. move. When the upper sprocket ram rotates, the arm rod 27 rotates integrally with the upper sprocket λ6, so the belt 30 at the tip of the arm 2q moves forward and passes through the notch (not shown) of the guide gutter 3 to the supply port/ The winding core /3 inserted above g and waiting at the supply port /g is pressed from above against the left bias of the flat spring 2, and the winding core /3 is moved to the winding roller //, / It can be sent out in two parts with an interval of ;1. The timing for sending out the winding core /3 is when the winding roller //,
/: Immediately before the end of winding a predetermined length of paper 5 around core /3 located within one interval. To detect the length of the paper S wound around the core /3, for example, a detector (not shown) consisting of a cam and a switch is provided in the rotation system of the perforation roller. The predetermined rotation speed, that is, the length of the paper S transferred by the perforation roller can be detected.

The winding core /3 that fell from the supply port /g is taken up by the winding roller //,
Since the interval between /2 is the same as the outer diameter of winding core /3, or slightly narrower than that, it does not pass through the interval downward as shown by the solid line in Figure 5, and both winding areas roller//,/
2 and rotates by the rotation of both rollers // and /J. Then, the endless belt 30 further descends and the winding core /3
When the endless belt 30 comes into contact with the winding rollers //, /, 2, the endless belt 30 rotates due to the rotation of the winding core /3 and pushes the winding core 13 into the narrowest interval between the winding rollers //, /, 2. Since the winding core /3 is made of cardboard or the like in the shape of a hollow pipe, when it is pressed from above by the endless belt 3o, it deforms slightly into an elliptical shape, and the narrowest interval between the winding rollers // and /J is You can pass through it while rotating inside. After passing, the elastic cross section returns to a nearly perfect circle, as shown by the dotted line in Figure 5.

The receiver is the roller/q is the core supplied as above/
The paper 5 is wound around the core /3 by supporting the winding roller //, /:l within the interval, and when the core /3 finishes winding the paper of a predetermined length, for example, 60 m. Take-up roller descends //
The winding core 13 can be taken out from an interval of ,/2. In the bearing shown in FIG. 1, the roller 9 is rotatably supported at the tip of a rotating rod 36 whose base end is pivoted to the frame. It is designed to be able to move. One end of the regulating rod 3g is maintained between the rotating rod 3A and the rod 37' of the air cylinder 3, and the middle of the regulating rod 3g is pivoted to the frame, and the cam floor 39 provided at the other end is connected. When it comes into contact with the circumferential surface of the eccentric cam lIO, the receiver can appropriately set the top dead center of the roller /9 by adjusting the stop position of the eccentric cam lIO.

Therefore, when the eccentric cam lIO is appropriately adjusted and air is forced into the air cylinder 37, the roller /q of the receiver rises to a predetermined height, and the winding core /3 is moved to the winding roller //.

It can be supported at an optimum height of 12 intervals. Winding core/3
As shown by the dotted line in Figure 3, the optimum height of the center 73' of the winding core /3 is slightly lower than the straight line l connecting the take-up rollers is the height at which it is located.

When the winding core /3 is supported at this height, the winding core /3 is supported by simultaneously contacting the circumferential surface of both winding rollers //, /:1 and the circumferential surface of the roller L. It will be done.

Therefore, when both winding rollers l/, /co are rotated in the clockwise direction in Figure 1 in this state, the winding core /3 rotates efficiently without slipping counterclockwise due to friction, and the perforations are formed. The paper 3 sent from the mechanism 10 can be efficiently wound up. In addition, the winding core /3 is 5 as mentioned above.
Since it is supported at two points, the paper S can be reliably wound up without bouncing or slipping even when the winding rollers //, /l are rotated at high speed. Therefore, winding can be performed faster and more efficiently than conventional winding devices.

When the core 13 winds up the paper S, the outer diameter gradually becomes thicker as shown in FIG. gradually decreases. Note that even if the roller/9 gradually descends, the receiver will not hold the winding core/
Since the circumferential surface of the paper wound on S is always pressed against the circumferential surface of roller /q, the circumferential surface of both winding rollers //, /2 and the receiver are always pressed against the circumferential surface of roller /q, so even if the paper S is wound at high speed, wrinkles will not occur. without occurring,
It can be rolled up more tightly than before. Also cylinder 3
By adjusting the pressure in step 7, it is possible to adjust the winding pressure of the paper wound around the core /3.

Winding core /3 is a length slightly shorter than the predetermined length, for example, 59 m long paper j out of 60 rrL is wound -/l
- When the core is removed, the detector installed in the rotation system of the perforation roller sends a signal as described above, and the signal causes the core delivery mechanism 21/- to operate, as shown in FIG. The endless belt 3θ begins to press the winding core /3 waiting at the supply port /g. Then, when the winding core /3 on the roller /9 winds up a predetermined length of paper, the endless belt 3
0 feeds the empty winding core /3 into the interval between the winding rolls // and /2. When the winding core /3 on the roller /9 winds up a predetermined length of paper, the take-out arm lI3, which has a take-out part groove at the tip, is placed in the groove of the rear winding roller foot.
It is rotated by the action of the interlocking rod II which is connected to the base end of the arm 3 and the second cam l16 that comes into contact with the cam floor +1 at the lower end of the interlocking rod 1III, so that the take-out part 1 comes into contact with the paper roll and the receiver is rotated by the roller/ 9 begins to fall. Take-out part L
2 comes into contact with the wrapping paper as shown in FIG. 7, the wrapping paper rotates and as shown in FIG. 4'2 and stop. Even if the paper roll stops, the take-up roller/i,
Since is continues to rotate, the paper 5 fed from the perforation mechanism IO begins to loosen as shown in FIG. The groove g of the front winding roller // is inside the winding roller //,
A nozzle lid is provided that injects air obliquely from below toward the interval of 1/2. Therefore, when all the air is injected from the nozzle l19, the loose paper 3 is blown away as shown in Figures 8 to 10, and is sandwiched between the rear winding roller and the new core. be included. In this state, the rear winding roller 2 pulls the end of the winding paper that is stopped on the nip 7, and a strong tensile force is generated at the end of the winding paper. The paper between the rear winding roller /2 and the paper wrapper is separated from the perforation. Therefore, the paper cutting process and the core feeding process can be performed without changing the feeding speed of the paper fed between the take-up rollers // and 11.

The winding core 13, which has been wound with a predetermined length of paper in the manner described above, is held at the nip 4'? as shown in FIG. It rolls due to the tilting of , and is placed on the tightening machine Sθ and tightened.

73- On the other hand, the winding roller // is moved by the winding core sending mechanism J.

As shown in FIG. 8, the empty winding core 13 that has been fed within the interval of /: is moved to the narrowest interval between the take-up rollers //, /:l when the roller /9 descends. is pressed by the endless belt 3θ and passes from top to bottom. At this point, the rear take-up roller saw is rotating faster than the front take-up roller due to the action of the transmission mechanism. Therefore, the take-up roller/
The winding core /3 located at the narrowest interval between / and /2 receives an upward force due to friction with the rear winding roller saw, and is prevented from rising by the endless belt 3θ. Therefore, the winding core 13 is positioned downwardly and the winding roller/q is not supported.
It is held without falling from within the interval of /, /, 2, and rotates counterclockwise in the drawing. In this state, nozzle l
When the loose paper is blown by the air blown from Iq to the contact area between the winding core /3 and the rear winding roller /2, the winding core /
3 begins to wind up this paper. When the paper is cut by the tensile force, the core 3 winds up the paper at the cut end.

In this way, the winding roller //, the winding supplied between 7.2 -/
4'- As shown in Fig. 11, the core /3 is held from below by the difference in rotational speed between the take-up roller // and 7:l, even without the support of the roller, and the perforation The left side of the paper sent from the engraving mechanism io can be wound up. Therefore, the roller/9 of the receiver should not be related to the position of the winding core/3.
Once the paper is sent to the nipping duct, it should be raised quickly.

When the paper cutting process shown in FIG. 10 is completed, the receiver roller gradually rises due to the action of the air cylinder 37, and as shown in FIG. approaches the interval between the winding rollers //, / and supports the winding core /3 existing within the interval.

Then, when the winding core /3 within the interval between the winding rollers // and /2 winds up a predetermined length of paper 5, the receiver moves to the roller /? In the same way as above, the rolled paper is transferred to the winding roller //.

Descend so that it can be taken out from the /2 interval.

In this way, the above-mentioned winding device winds up a predetermined length of paper 5 onto the core /3 that is supplied to the core /3 within the interval between the winding rollers // and /2, without changing the feeding speed of the paper 3. Wrapping paper can be produced continuously.

-/S- In addition, by operating the speed change mechanism /4', the rear winding roller /
In order to detect when to rotate the winding roller 2 at a higher speed than the front winding roller // or when to raise or lower the roller holder /9, for example, a detector installed in the rotation system of the perforation roller t can be used. The feeding length of the paper can be detected electrically, or a deceleration means and a cam can be installed in the rotation system of the perforation roller.
This cam can be used to raise and lower the roller 19, or by using known detection means and transmission means.

As explained above, according to the present invention, two winding rollers are arranged one behind the other at an interval through which the winding core passes, and the supply port of the winding core supply device that supplies the winding core to one of the winding rollers is connected to the winding roller at the interval between the winding rollers. When the core is raised from below, the core is supported from below and the paper is wound up. The descending receiver is provided with a roller that can move up and down, and is connected to the take-up roller with a speed change mechanism that rotates the rear take-up roller at a higher speed than the front take-up roller. Due to the difference in circumferential speed between the winding core and the roller, a new winding core supplied from the winding core supply device can be held within the interval between the winding rollers. Therefore, there is no need to provide a core support device with a complicated configuration, and the configuration of the winding device can be simplified. Further, in the present invention, there is no need to change the paper supply speed or the interval between the winding rollers, so it is possible to efficiently and continuously create paper wrappers.

Note that the present invention is not limited to roll-up of toilet paper, but can be widely used as a manufacturing device for other paper wrappers.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a partially cutaway plan view, FIG. 3 is a partially enlarged side view of the take-up roller, and FIGS. FIG. 12 is a schematic side view of each step. S...Paper, //...Front take-up roller, /Co...
Rear winding roller, /3... Winding core, /lI... Speed change mechanism, /7... Winding core supply device, 7g... Supply port, /
9...The receiver is Laura.

Claims (1)

[Claims] Two take-up rollers are arranged one behind the other with the interval that the winding core passes through, and the supply port of the core supply device that supplies the winding core to one roll faces above the interval between the winding rollers. When the lower part rises, it supports the core from below and winds the paper onto the core, and when the core containing a predetermined length of paper is taken out from the take-up rollers, the receiver that descends supports the rollers up and down. A rolling paper characterized in that the winding roller is provided with a variable speed mechanism that rotates the rear winding roller faster than the front winding roller to maintain the winding core within the distance between the winding rollers. Winding device.