JPH0438657B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for winding paper in which a core supplied within a gap between the winding rollers is held so as not to fall due to a difference in circumferential speed between winding rollers arranged in parallel before and after the winding rollers. It is related to the 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 receiving roller, the receiving roller is lowered when taking out the finished core. There must be. 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.

Furthermore, the winding device described in JP-A-56-52345 is equipped with a suction mechanism on the first lower drum, and cuts the paper using the suction force of the suction mechanism, but it is still complicated and large-scale. It is a structure that has many causes of failure.

The present invention has been proposed in view of the above, and has a front winding roller that supports paper on the upper surface and a number of depressions on the circumferential side, and has a winding core that is connected to the front winding roller. Rear winding rollers arranged side by side with an interval that is the same as the outer diameter or slightly narrower, and a core supply that supplies the winding core one by one with the supply port facing above between the two winding rollers. Facing below between the device and the two take-up rollers, supports the winding core within the interval between the winding rollers, winds up a predetermined length of paper on the winding core, and when winding is completed. a receiving roller that can be raised and lowered so that the core can be taken out; a detection means that detects the length of the paper to be wound and sends out a detection signal; A core feeding mechanism that feeds out an empty core waiting at the supply port, and a core feeding mechanism that injects air diagonally from below toward the gap between the winding rollers to transfer a portion of the paper to the side circumferential surface of the rear winding roller. The nozzle is brought into close contact with the winding roller, and the new winding core fed into the gap between the winding rollers by the above-mentioned winding core feeding mechanism is prevented from falling from between the two winding rollers, and the circumferential side of the rear winding roller is a speed change mechanism that rotates a rear take-up roller at a higher speed than a front take-up roller so that the air flow jetted from the nozzle securely wraps the tightly attached paper around the circumferential side of a new core; Prepare,
The rear roller, which rotates at a higher speed than the front winding roller, generates a tensile force on the paper that extends from the rolled paper and starts winding on a new core, and this tensile force It is an object of the present invention to provide a paper winding device characterized in that the paper is cut by the following steps.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to drawings of an embodiment in which the present invention is implemented as a winding device for a toilet paver.

As shown in FIG. 1, the winding device is provided with a base paper placement section 3 adjacent to a frame-like frame 1 on which a rolled base paper 2 is rotatably placed. A feed belt mechanism 4 that feeds out the base paper in contact with the outer peripheral surface of the base paper 2, and a guide roller 6 that laterally guides the paper 5 that is fed upward by the rotation of the feed belt mechanism 4 are provided. A perforation forming mechanism 10 is provided on the side, and includes a fixed blade receiver 7 and a perforation roller 9 having a perforation blade 8 attached to the outer peripheral surface facing each other vertically. On the side, two horizontally elongated winding rollers 11 and 12 are arranged front and back, spaced apart by an interval that is approximately the same as the outer diameter of the winding core 13 or slightly narrower than that, and the feed belt mechanism 4 and the sewing machine eye roller 9
and the front winding roller 11 are each mechanically connected to a drive source (not shown) so that they rotate at the same feed speed.

As shown in FIG.
A large number of circular depressions 12A penetrating the circumferential surface.
are formed in three rows around the circumferential surface. In addition, both the winding rollers 11 and 12 have the rear winding roller 12 set to the front winding roller 1 at a predetermined time.
Transmission mechanism 1 that can rotate at a higher speed than 1
4 are connected.

As shown in FIG. 2, the speed change mechanism 14 has speed change pulleys 16a and 16b on which the V-belt 15 can be applied and whose diameter can be changed, on the shafts 11' and 12' of both take-up rollers 11 and 12. Installation: This is a continuously variable transmission in which a V-belt 15 is stretched across both speed change pulleys 16a and 16b.The effective diameter of the speed change pulley 16a attached to the front winding roller 11 is increased, and the speed change pulley 16a is attached to the rear winding roller 12. speed change pulley 16b
By making the effective diameter smaller, the rear winding roller 12 can be rotated at a higher speed than the front winding roller 11. The transmission mechanism 14 is a cone type continuously variable transmission using a conical belt pulley;
Other known transmission mechanisms may also be used.

Above the interval between the take-up rollers 11 and 12, there is a core supply device 1 that supplies each core 13 within the interval.
A receiving roller 19 that supports the core 13 supplied from the core supply device 17 from below is provided so as to be movable up and down below the above-mentioned interval.

The core supply device 17 shown in FIG. The core take-out roller 22 rotates and takes out the core 1.
3 to the supply port 18 at the lower end;
The guide gutter 2 comprises a winding core feeding mechanism 24 located near the supply port 18 of the guide gutter 23 and feeding the winding core 13 into the space between the winding rollers 11 and 12.
The supply port 18 of No. 3 is provided with a flat spring 25 whose lower end is bent inward. Therefore, when the core take-out roller 22 is rotated and the core 13 in the take-out groove 21 is fed into the guide groove 23, the core 13 is removed from the guide groove 23.
The flat spring 2 of the supply port 18 flows down while rolling inside.
5 and waits. The winding core 13 waiting at the supply port 18 is sent out within the interval between the winding rollers 11 and 12 by the winding core delivery mechanism 24.

The winding core feeding mechanism 24 includes the winding rollers 11 and 1.
Immediately before the cores 13 within the interval 2 wind up a predetermined length of paper 5, the empty cores 1 waiting at the supply port 18
Any configuration may be used as long as it forcibly sends out 3. Core feeding mechanism 24 shown in FIG.
is the roller 1 coaxially with the rear winding roller 12.
The upper sprocket 2 can be rotated separately from the upper sprocket 2.
6 and the arm rod 2 to which the sprocket 26 is attached.
A horizontally elongated bearing shaft 28 is attached to the tip of the rear winding roller 12.
An endless belt 30 is stretched in a triangular shape by small pulleys 31 on the tip of an arm 29 which is provided along the length of the bearing shaft 28 and extends forward from the middle of the bearing shaft 28. Sprocket 3
2 are connected by a chain 33, and a cam follower 34 provided on the lower sprocket 32 is connected to the first cam 35.
It comes into contact with the circumferential surface of. Therefore, the first cam 35
When the cam follower 34 rotates, the lower sprocket 32 rotates counterclockwise in FIG. 1, which causes the upper sprocket 26 to rotate counterclockwise via the chain 33. When the upper sprocket 26 rotates, the arm rod 27 rotates integrally with the upper sprocket 26, so that the belt 30 at the tip of the arm 29 moves forward from the cutaway view (not shown) of the guide trough 23 to the upper side of the supply port 18. The winding core 13, which is inserted into the winding roller and is waiting at the supply port 18, is pressed from above against the urging force of the flat belt 25, and the winding core 13 is sent to the upper part of the gap between the winding rollers 11 and 12. can. In addition, the winding core 13
The timing for sending out the paper 5 is just before the end of winding a predetermined length of paper 5 around the winding core 13 located within the interval between the winding rollers 11 and 12. To detect the length of the paper 5 wound around the core 13, for example, a detector (not shown) consisting of a cam and a switch is provided in the rotation system of the perforated roller 9, and the detector detects the length of the perforated roller 9. It is sufficient to detect the rotation speed of the perforation roller 9 and detect the predetermined rotation speed, that is, the length of the paper 5 transferred by the perforation roller 9.

Since the interval between the winding rollers 11 and 12 is the same as the outer diameter of the winding core 13 or slightly narrower than that, the winding core 13 that has fallen from the supply port 18 is adjusted so that the interval is changed as shown by the solid line in FIG. It does not pass downward, but instead is placed on both take-up rollers 11 and 12 and rotated by the rotation of both rollers 11 and 12. Then, when the endless belt 30 further descends and contacts the winding core 13, the endless belt 30 rotates due to the rotation of the winding core 13, and the endless belt 30 moves the winding core 13 between the winding rollers 11, 12.
Push it into the narrowest space. Since the winding core 13 is made of cardboard or the like in the shape of a hollow pipe, when it is pressed from above by the endless belt 30, it slightly deforms its oval shape and rotates within the narrowest interval between the winding rollers 11 and 12. You can pass while After passing, the cross section returns to a nearly perfect circle due to elasticity, as shown by the dotted line in Figure 3.

The receiving roller 19 supports the winding core 13 supplied as described above within the interval between the winding rollers 11 and 12, winds up the paper 5 on the winding core 13, and unwinds the winding core 13.
When it has finished winding a predetermined length of paper, for example 60 m, it descends and picks up the core 1 from the gap between the winding rollers 11 and 12.
This allows you to take out 3. The receiving roller 19 shown in FIG. 1 is rotatably supported at the tip of a rotating rod 36 whose base end is pivoted to the frame 1, and can be moved up and down by an air cylinder 37 connected midway through the rotating rod 36. It is set as. In addition, rotating rod 36
One end of the regulating rod 38 is connected between the rod 37' of the air cylinder 37 and the regulating rod 38 is pivotally attached to the frame 1 in the middle, and the cam follower 39 provided at the other end is connected to the circumferential surface of the eccentric cam 40. , the top dead center of the receiving roller 19 can be appropriately set by adjusting the stop position of the eccentric cam 40.

Therefore, when the eccentric cam 40 is appropriately adjusted and air is force-fed to the air cylinder 37, the receiving roller 1
9 rises to a predetermined height, and the winding core 13 is moved to the winding roller 1.
It can be supported at the optimum height of 1.12 intervals.
The optimum height of the winding core 13 is defined as the center 1 of the winding core 13 located slightly below the straight line l connecting the centers 11'' and 12'' of the winding rollers 11 and 12, as shown by the dotted line in Figure 3.
This is the height at which point 3' is located. Winding core 13 at this height
When supporting the winding core 13, both winding rollers 11,
It is supported by simultaneously contacting three places: the circumferential surface of the roller 12 and the circumferential surface of the receiving roller 19.

Therefore, in this state, both take-up rollers 11 and 12
When the winding core 13 is rotated clockwise in FIG. 1, the winding core 13 rotates efficiently without slipping counterclockwise due to friction, and the paper 5 sent from the perforation mechanism 10 can be efficiently wound up. . Winding core 13
Since the paper 5 is supported at three places as described above, the paper 5 can be reliably wound without bouncing or slipping even when the winding rollers 11 and 12 are rotated at high speed. Therefore, winding can be performed faster and more efficiently than with conventional winding devices.

As the core 13 winds up the paper 5, the outer diameter gradually increases as shown in FIG.
9 gradually descends. Note that even if the receiving roller 19 gradually descends, the circumferential surface of the paper wound around the core 13 is constantly pressed against the circumferential surface of both take-up rollers 11 and 12 and the circumferential surface of the receiving roller 19, so that the paper 5 can be wound up more tightly than before without wrinkles even when wound up at high speed. Also cylinder 3
By adjusting the pressure in step 7, the winding pressure of the paper wound around the winding core 13 can be adjusted.

When the winding core 13 winds up a paper with a length slightly shorter than the predetermined length, for example, about 59 m out of 60 m, the detector provided in the rotation system of the perforation roller 9 generates a signal as described above. This signal activates the core delivery mechanism 24, and the endless belt 30 begins to press the core 13 waiting at the supply port 18, as shown in FIG. When the winding core 13 on the receiving roller 19 winds up a predetermined length of paper, the endless belt 30 feeds the empty winding core 13 into the space between the winding rollers 11 and 12, as shown in FIG. . When the winding core 13 on the receiving roller 19 winds up a predetermined length of paper, as shown in FIGS. The take-out arm 43 has
The extraction section 4 rotates by the action of an interlocking rod 44 connected to the base end of the arm 43 and a second cam 46 that abuts a cam follower 45 at the lower end of the interlocking rod 44.
2 comes into contact with the wrapping paper, and the receiving roller 19 begins to descend. When the take-out part 42 comes into contact with the paper roll as shown in FIG. 7, the paper roll rolls from the receiving roller 19 onto the clamp 47 as shown in FIG. 42 and stop. Even if the paper roll stops, the winding rollers 11, 1
2 continues to rotate, the paper 5 fed from the perforation mechanism 10 begins to loosen as shown in FIG. A nozzle 49 is provided in the groove 48 of the front winding roller 11 to inject air from diagonally downward toward the interval between the winding rollers 11 and 12. Therefore, when air is injected from this nozzle 49, the loose paper 5 is blown away as shown in FIGS. .

At this time, since the circular recessed portion 12A is provided on the circumferential side of the rear winding roller 12, the paper 5 is moved by the air jetted diagonally from below toward the interval between the winding rollers 11 and 12. Rear winding roller 12
In addition, a portion of the paper 5 is wedged into the recessed portion 12A, as shown in FIG. 11. Therefore, since the rear winding roller 12 continues to rotate with a portion of the paper 5 biting into the recessed portion 12A, an extremely strong tension is applied to the end of winding of the paper that is stopped on the clamping table 47. A force is generated, and this tensile force causes the rear winding roller 1 to
The paper between 2 and the wrapping paper is cut.

Therefore, the paper cutting process and the core feeding process can be performed without changing the feeding speed of the paper fed between the winding rollers 11 and 12.

As shown in FIGS. 12 and 13, the winding core 13, which has finished winding the paper of a predetermined length as described above, rolls due to the tilting of the pincer 47, and is placed on the seaming machine 50 and wound. It is tightened.

On the other hand, the winding roller 1 is
Empty winding core 13 fed into the interval 1, 12
As shown in FIG. 8, when the receiving roller 19 descends, it is pressed by the endless belt 30 and passes from top to bottom within the narrowest interval between the take-up rollers 11 and 12. At this point, the rear take-up roller 12 is rotating faster than the front take-up roller 11 due to the action of the speed change mechanism 14. Therefore, the winding roller 11,
The winding core 13 located at the narrowest interval of the winding rollers 12 receives an upward force due to friction with the winding roller 12 at the rear, and is restrained from rising by the endless belt 30. For this reason, the winding core 13 is held downward by the receiving roller 19.
It is held without falling from within the gap between the winding rollers 11 and 12, rotates counterclockwise in the drawing, winds up the edge of the paper 5 cut in the cutting process, and winds up the paper 5. Start. That is, at the moment when the paper 5 is cut, the cutting area of the paper 5 comes into close contact with the circumferential side of the rear winding roller 12 due to the air ejected from the nozzle 49, and a part of the paper 5 sinks into the recessed part 12A. Therefore, the cut end of the paper 5 is securely held by the rear winding roller 12.

Then, by rotating the rear winding roller 12 while holding the cut end of the paper 5 on the circumferential side, the cut end of the paper 5 follows the rotation of the rear winding roller 12 and rolls onto the winding core. It is guided reliably by the circumferential side of the winding core 13 without any overlap, and is wound around the winding core 13.

As shown in FIG.
The paper 5 fed from the perforation forming mechanism 10 can be wound up. Therefore, the receiving roller 19 is connected to the winding core 13.
The rolling paper is placed on the clamping stand 47 without much influence on the position of the paper.
If you send it to , you should raise it quickly.

When the paper cutting process shown in FIG. 10 is completed, the receiving roller 19 gradually rises due to the action of the air cylinder 37, and as shown in FIG.
By the time the winding process of step 3 is performed, the winding rollers 11,1
2, and supports the winding core 13 within the interval.

And the winding core 13 within the interval between the winding rollers 11 and 12
When the paper 5 of a predetermined length is wound up, the receiving roller 19
, similarly to the above, descends so that the wound paper can be taken out from the space between the winding rollers 11 and 12.

In this way, the winding device has winding rollers 11 and 1.
By winding up a predetermined length of paper 5 onto the core 13 that is supplied one by one within two intervals, it is possible to continuously manufacture the paper rolls without changing the feeding speed of the paper 5.

In addition, in order to detect when the speed change mechanism 14 is activated to rotate the rear winding roller 12 at a higher speed than the front winding roller 11, when to raise or lower the receiving roller 19, etc., for example, perforations can be detected. This can be done by using known detection means and transmission means, such as providing a speed reduction means and a cam in the rotation system of the roller 9 and raising and lowering the receiving roller 19 using this cam.

Although one embodiment of this invention has been described in detail above, this invention is not limited to the above embodiment, and it goes without saying that it can be implemented with appropriate modifications within the scope of the gist of this invention. Nor.

In the above embodiment, the recessed portion 12A is a through hole, but it may also be a recessed hole with a concave inner surface.
A large number of them may be formed on the entire circumferential side of the 2. moreover,
The recessed portion 12A is not limited to a circular hole, but may be an elongated hole, or may be a slot extending around the circumferential side of the rear winding roller. In short, it is only necessary that a recess into which a part of the paper 5 can be pushed in by jetting air can be formed on the circumferential side of the rear winding roller.

As explained above, the present invention has a front winding roller that supports the paper on the upper surface and a large number of depressions on the circumferential side, and has an outer diameter that is equal to the outer diameter of the winding core with respect to the front winding roller. or a rear winding roller arranged in parallel at a slightly narrow interval, a winding core supplying device that supplies the winding core one by one with a supply port facing above between the two winding rollers; It faces below between the two take-up rollers, supports the core within the gap between the take-up rollers, winds up a predetermined length of paper onto the core, and lowers the paper when winding is finished. A receiving roller that can be raised and lowered so that the core can be taken out, a detection means that detects the length of the paper to be wound and sends out a detection signal, and a roller that is activated by the detection signal of the detection means and waits at the supply port. A winding core feeding mechanism that sends out an empty winding core, and air is injected diagonally from below toward the gap between the winding roller and the winding roller to bring a portion of the paper into close contact with the side circumferential surface of the rear winding roller. The nozzle and the new core fed into the space between the winding rollers by the core feeding mechanism are prevented from falling from between the two winding rollers, and the nozzle is placed on the circumferential side of the rear winding roller. It is equipped with a speed change mechanism that rotates the rear take-up roller at a higher speed than the front take-up roller, so that the airflow jetted from the winder ensures that the tightly wrapped paper is wrapped around the circumferential side of a new core. ,
The speed difference between the front winding roller and the rear winding roller allows the new winding core supplied from the winding core supply device to be held within the winding roller spacing.

Moreover, since there are many depressions on the circumferential side of the rear winding roller, the paper can be reliably brought into close contact with the circumferential side, and the paper can be wound onto the core by applying tension to the paper. can be reliably cut, and the cut end of the paper remaining between the take-up rollers can be reliably wound around the core newly supplied between the take-up 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, and the leading edge of the paper can be prevented from bumping up against each other and the winding length can be inconsistent. It is possible to start winding the paper around the winding core and perform smooth winding without having to do so.

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 the roll-up of toilet paper, but can be widely used as a manufacturing apparatus for other paper wrappings.

[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. 13 is a schematic side view of each step. 5...Paper, 11...Front take-up roller, 12...
... Rear winding roller, 12A... Concave portion, 13...
... Core, 14... Speed change mechanism, 17... Core supply device, 18... Supply port, 19... Receiving roller.

Claims (1)

[Scope of Claims] 1. A front winding roller that supports the paper on its upper surface, and a number of depressions on the circumferential side, the outer diameter of which is the same as or equal to the outer diameter of the winding core with respect to the front winding roller. are rear winding rollers arranged side by side with a slightly narrow interval, a winding core supply device which supplies the winding core one by one with a supply port facing above between the two winding rollers, and the above two winding rollers. The core is supported within the gap between the take-up rollers, and a predetermined length of paper is wound onto the core. A receiving roller that can be raised and lowered so that paper can be taken out; a detection means that detects the length of the paper to be wound and sends out a detection signal; a winding core feeding mechanism that sends out an empty winding core; a nozzle that injects air obliquely from below toward the interval between the winding rollers to bring a portion of the paper into close contact with the side peripheral surface of the rear winding roller; The new winding core fed into the gap between the winding rollers by the core feeding mechanism is prevented from falling from between the two winding rollers, and is sprayed from the nozzle onto the circumferential side of the rear winding roller. a speed change mechanism that rotates a rear take-up roller at a higher speed than the front take-up roller in order to reliably wrap the tightly adhered paper around the circumferential side of a new core through the airflow; The rear roller, which rotates at a higher speed than the take-up roller, generates a tensile force on the paper that extends from the rolled paper and begins winding on a new core, and this tensile force cuts the paper. A winding device for rolling paper, characterized in that the winding device is configured to do so.