JPS6121899B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shaft-driven winding device, and particularly to an improvement in the touch roller relationship in a winding device in which the touch roller is pushed by the sheet roll surface and gradually separates from the take-up shaft as the winding diameter increases. The purpose is to improve the winding quality by More specifically, the first invention changes the support mechanism of the touch roller, which conventionally moved while maintaining contact with the surface of the sheet roll being wound, and is free to move away from the winding shaft. By making it impossible for the sheet roll to roll in the opposite direction, that is, to return, the sheet roll can always be wound in a perfect circle. Further, the second invention adds a fine variable speed interlocking mechanism for driving the touch roller and the sheet pull-out roller in a slightly variable speed interlock to the main structure of the first invention, so that the touch roller plays an intermediary role between the sheet feeding tension and the winding tension. By doing so, we were able to obtain sheet rolls of even higher quality.

Hereinafter, the first invention will be explained first, and then the second invention will be explained.

In theory, if a shaft-driven winding device winds up a sheet with a constant winding torque, it should be able to wind the sheet to have a perfect circular cross section. However, in reality, the cross section tends to be somewhat circular or other irregular circles. Since its causes are complex, there have been no preventive measures in the past.

Therefore, the first invention makes use of the conventional Tatsuchi roller so that when a sheet roll starts to become distorted during winding, regardless of the cause, it can be immediately corrected and returned to a perfect circle. That's what I did.

FIG. 1 shows an explanatory diagram of its principle. The sheet roll 1 being wound up has a circular cross section. The base paper roll 2 is placed on a pedestal and is equipped with a braking device, so that when the sheet S is pulled out, feeding (or running) tension is generated, but the illustration is simplified.

Sheet pull roller (pinch roller in this case)
The sheet feeding device 20 mainly includes a well-known drive device 21, a guide roller 22, a dancer roller 23, etc., for feeding the sheet S from the base paper roll 2 between the touch roller 10 and the sheet roll 1.

As before, the touch roller 10, which is the main character of this invention, rotates in contact with the surface of the sheet roll 1 during winding, and as the winding diameter increases, it is pushed by the surface of the sheet roll and moves away from the winding shaft 1a. It is swingably supported by a support arm 11 that constitutes a part of a support mechanism. The arm 11 is pushed up by the pneumatic cylinder 12, and the touch roller 10
The pressure on the sheet roll 1 due to gravity is weakened so that it can be adjusted.

Up to this point, it is no different from the conventional Tatsuchirolla.
What is different from the conventional one is that the support mechanism allows the touch roller 10 to move away from the winding shaft 1a during winding, but does not allow movement in the opposite direction. Specifically, in the example shown in the figure, a free running clutch 13 (a clutch that can freely rotate in one direction and cannot rotate in the opposite direction) is attached to the swinging arm 11a of the support arm 11 to provide a check effect. There is. When winding is completed, the on-off clutch 14 interposed between the free running clutch 13 and the machine frame 3 is turned off to release the restraint under the machine frame, and the free running clutch 13 is released. The check effect can be canceled.

When the on-off clutch 14 is turned on, the free running clutch 13 has a non-returning action, and the rotational drive device 30 of the winding shaft 1a and the drive device 21 of the sheet feeding device are started, the sheet S grows around the winding shaft 1a. As shown in Fig. 1, when the sheet roll 1 has a circular cross section,
With conventional Tatsuchi rollers, when the long diameter part of the inertia-circular cross section comes, it is pushed up, and when the short diameter part comes, it is lowered by its own weight. Therefore, the touch roller vibrates or irregularly bounces, which promotes uneven winding.However, since the touch roller 10 of the present invention is supported by a support arm 11 having a check function, When pushed up,
It will never come down from that position.

This point is important. When the sheet roll 1 in Fig. 1 comes to the solid line position and the touch roller 10 is pushed up to the position shown in the figure, the sheet roll 1 rotates 90 degrees and when it comes to the chain line position, the touch roller 10 It is raised from the surface of the sheet roll 1. Therefore, the touch roller 10 in this state does not function to push out air from the sheet winding surface, which is its original purpose. Then, the surface of the long diameter portion of the sheet roll 1 that has been further rotated by 90 degrees is sufficiently pressurized to expel air or push it toward the short diameter portion.

In other words, the touch roller 10 of the present invention does not adapt to the irregular circular shape of the sheet roll 1, but works to suppress the longer diameter portion of the irregular circle and loosen the shorter diameter portion. Therefore, even if the cause of uneven winding remains the same, the touch roller 10 forces the sheet roll 1 to maintain a circular cross section.

FIGS. 2 and 3 show an embodiment of the concept shown in FIG. 1. FIG. 3 is an enlarged plan view of the support arm 11 and its surroundings in FIG.
Parts corresponding to the clutch 13 and on/off clutch 14 are also shown. Note that parts having the same function are given the same reference numerals even if the models are different.

In this embodiment, the sheet S coming out of the base paper roll 2 is divided into a plurality of strips by a slitter 4, and the first
The three friction-type pull-out rollers 20', which replace the pinch roller-type pull-out roller 20 shown in the figure, separate into upper and lower parts at the exit.
It is distributed and wound. The drive unit of the sheet feeding device includes a motor 21, a belt 24, a pulley 25, a gear 26 coaxial with the motor 21, a gear 26 that meshes with the pull-out roller 20', and has the same axis and diameter as the pull-out roller 20'. Driving the first of the pull-out rollers. In this embodiment, a belt 24 is also placed between a pulley having the same axle and the same diameter as the gear and a pulley 15 at the end of the drive guide roller 18 of the support arm drive shaft 11a, so that the touch roller 10 can also be rotated in conjunction with the pulley. However, this is because this embodiment also serves as the embodiment of the second invention of the present application. Therefore, in a basic embodiment of the first invention, the motor 21 may only drive the pull-out roller 20, as in FIG. Note that the loss in the case where the touch roller 10 rotates following the rotation of the sheet roll 1 as shown in FIG. 1 and when the touch roller 10 is actively driven as shown in FIG. It will be mentioned in the explanation.

In any case, the sheet roll 1 is the motor 30,
Rotationally driven by the magnetic powder clutch 31 via a transmission mechanism (not shown), the sheet feeding device (pull-out roller) pulls out the sheet S from the base paper roll 2 and passes it around the guide rollers etc. as shown by the chain line to the touch roller 10 and the sheet roll. 1, the sheet roll 1 gradually increases its winding diameter. and,
When the thick sheet roll 1 begins to become distorted as shown in FIG. 1, the support mechanism of the support arm 11 of the touch roller 10, which has the above-mentioned check function, becomes effective. The support mechanism will be explained with reference to a plan view and FIG.

In this embodiment, the side plates on both sides of the support arm 11 support not only the target touch roller 10 but also an intermediary roll 16 and an internal drive guide roller 18 in the support arm, and pass a fixing member 17 therebetween. This support arm 1
1 is a swing shaft 11a coaxial with the drive guide roller 18;
are pivotally supported on the front and rear vertical plates of the machine frame 3, and are swingably supported. Then, to prevent the contact pressure with the surface of the sheet roll 1 from being too strong due to the weight of the touch roller 10 and other components, the pneumatic cylinder 12 is used to push it up lightly, and the contact pressure can be controlled by adjusting the air pressure. Therefore, as the sheet roll 1 grows, the support arm 11 gradually rotates upward, and the touch roller 10 separates from the take-up shaft 1a. Support arm 11 in the direction of separation
In the case of this embodiment, the above-mentioned free running shaft 11a is attached to the left swing shaft 11a in FIG.
I'm wearing a clutch 13. A brake belt 19 is placed around the outer periphery of the clutch 13, and tension and relaxation of this belt is controlled by a cam 19a attached to the machine frame 3 and a fluid pressure cylinder 19b. These functions correspond to the on/off switch 14 in FIG. If the brake belt 19 is tightened, the clutch 13
Since the outer periphery of the ring is fixed, it exerts a check effect, and when it relaxes, it can rotate freely. With this, while the support arm 11 rotates upward during winding, the touch roller 10 can prevent the sheet roll 1 from growing in an distorted manner as explained in FIG. By lowering it, the touch roller 10 can be placed on a new take-up shaft 1a.

Next, the second invention will be explained, but since the outline is the same as the first invention, only its unique parts will be described in detail.

In the second invention, the support mechanism allows the touch roller 10 to move in a direction away from the winding shaft during winding, but is not allowed to move in the opposite direction. In addition, the sheet feeding device is characterized in that it includes a finely variable speed interlocking mechanism that slightly changes the circumferential speed of the touch roller relative to the circumferential speed of the pull-out roller that pulls out the sheet from the base paper roll. In other words, FIG. 4 shows the characteristic components of the second invention added to the first invention, and here, the pull-out roller 20 and the touch roller 10 are shown.
A fine speed change interlocking mechanism 40 connects the two. This causes the touch roller 10 to rotate at a speed slightly faster or slower than the pull-out roller 20.

Therefore, first of all, considering the advantages and disadvantages of actively driving the touch roller 10, if the touch roller 10 is an idle roller, it will be rotated by the friction drive of the sheet on the surface of the sheet roll 1, and the friction drive reaction force will be applied to the sheet. It takes. If the touch roller 10 is actively rotated in accordance with the rotation of the sheet roll 1, the influence on the sheet above will be eliminated, but the sheet roll 1 and touch roller 1 that are actively driven together will not affect the upper sheet.
0. Both peripheral speeds must be the same. Since the outer diameter of the sheet roll 1 increases as winding progresses, it becomes mechanically troublesome to always match the outer diameter of the sheet roll 1 with the circumferential speed of the touch roller 10. However, this requires a slip mechanism such as a well-known magnetic powder clutch 31 to be interposed in the sheet roll drive mechanism by the motor 30, so that the driving torque of the sheet roll 1 is constant, and the rotation of the sheet roll 1 is driven by the touch roller 10. can be solved easily. Next, the reason why the circumferential speed of the pull-out roller 20 (sheet feeding speed) is not directly set as the circumferential speed of the touch roller 10, but is slightly varied is to adjust the elastic strain and tension of the sheet. Figure 5 shows the tension t1 of the sheet S while it is running from the base paper roll 2 to the pull-out roller 20, the sheet tension t2, t2' between the pull-out roller 20 and the touch roller 10, and the winding when the sheet S is wound around the sheet roll 1. Taking tension t3,
It shows t3′.

The tension t1 of the running sheet S is determined by the balance between the tensile force of the pull-out roller 20 and the brake on the base paper roll 2 side, but since this is for pulling out and there are many fluctuations, it cannot be used as the winding tension of recent precision winding. do not have.
The residual tension of the sheet wound onto the sheet roll 1 is determined by the sheet tension at the moment of winding while controlling the winding torque of the winding shaft 1a, that is, the winding tensions t3 and t3'.

In this second invention, an intermediate tension t2, t2,
By intervening the section t2', the actual winding tension was brought closer to the theoretical value. The solid line in the diagram shows the case where the winding tension t3 is larger than the feeding tension t1, and the intermediate tension t2 has a value between the two. The dotted line shows the opposite case, and in both cases the winding tension is gradually decreased by a well-known taper control. A fine speed interlocking device 40 is inserted between the pull-out roller 20 and the touch roller 10 as a means for changing the upper feeding tension t1 to intermediate tensions t2 and t2'. Just change the gear shift value by ±1
%, the sheet S will expand or contract by 1%, and the feeding tension will increase or decrease by that amount. The increased or decreased tension becomes t2, t2'.

The specific structure of the parts that do not overlap with the first invention will be explained with reference to the embodiment shown in FIGS. A belt 24 is placed between the belt 15 and the belt 15 so as to interlock the belt 24 with the belt 15. This pulley 1
The shaft 5 passes inside the swing shaft 11a pivotally supported by the machine frame 3 and is integrated with the shaft of the drive guide roller 18. Therefore, the sheet S wound around the drive guide roller 18 and advancing is at the same speed as the sheet S wound around the pull-out roller 20'. Alongside this drive guide roller 18, an intermediate roller 16 and a touch roller 10 are pivotally supported by the support arm 11. It is provided between the intermediate roller 16 and the intermediary roller 16 instead of That is, the pulley 15 at the end of the shaft of the drive guide roller 18 has a variable speed (cone) pulley part 15a in addition to the part on which the belt 24 from the pull-out roller 20' is applied. And its counterpart variable speed pulley 16a
is attached to the 16th shaft end of the intermediate roller. The portion of the belt 24a placed between the pulleys 15a, 16a that changes the position of the belt 24a to change the speed change ratio may be a commercially available product or may be specially manufactured, but since it is a well-known technology, illustrations and explanations thereof will be omitted.

The sheet between the drive guide roller 18 and the intermediary roller 16 is stretched or contracted (reduced elongation) by interlocking the slightly variable speeds of both rollers, and the feeding tension t1 changes to intermediate tensions t2 and t2' and is transferred to the touch roller 10. move on. Since the intermediary roller 16 and the touch roller 10 are interlocked by gears 26a and 26b proportional to their diameters, they advance without expansion or contraction and enter between the touch roller and the sheet roll. Then, the winding tensions t3 and t3' can be further changed by the winding torque of the winding shaft 1a.

Moreover, in the case of this embodiment, the support mechanism of the touch roller allows the touch roller 10 to move away from the winding shaft 1a during winding, but in the opposite direction. Since the sheet roll does not allow movement, the sheet roll will not be deformed.

Although the first and second inventions have been described above by way of one embodiment, they can be varied in various ways according to design conditions and the like according to well-known techniques of the designer without changing the gist thereof. For example, there are many ways to provide the touch roller support mechanism with a check effect that only allows the touch roller to move away from the take-up shaft, including claws, balls and slopes, friction cams, etc. for both rotational and linear motion. Further, in the embodiment of the first invention, mechanisms such as the fluid pressure cylinder 19b and the cam 19a are used as the on/off clutch, but other mechanisms may be used as long as they perform the same function. As long as the winding device is of a shaft-driven type, it may be a slitter rewinder that winds up a narrow sheet divided into a plurality of strips by a slitter via a touch roller provided for each sheet, in particular The invention can also be applied to, for example, a take-up shaft turret type in-line winder that continuously winds sheets sent out from a sheet production line. Further, as long as the touch roller can approach and move away from the winding shaft, it does not need to be supported by a swing arm as in the illustrated embodiment.

Further, the fine speed interlocking mechanism of the second invention is not limited to a combination of a variable speed pulley and a belt, but may be various as described in the mechanism related document. It is also possible to change the intermediate tension t2 in accordance with the gradual decrease of the winding tension t3 in FIG. As long as the device allows the circumferential speed of the touch roller to be slightly varied relative to the circumferential speed of the pull-out roller, the intervening location does not matter.

The first invention relates to a shaft-driven winding device, in which conventionally,
By adding the important function of preventing uneven winding of sheet rolls to the touch roller, which was used only to push out air between sheets, we have achieved improvement in the winding quality of sheet rolls. In other words,
Since the tatsuchi roller does not return from the position pushed up from the maximum radius of the sheet roll, the other parts that are not pushed swell. Then, since the maximum radius portion is repeatedly pushed locally, the sheet roll is forced to return to its perfectly circular cross section soon.

In addition to the above-mentioned first invention, the second invention is based on the conventional method of simply trying to obtain the required winding tension by adjusting the winding torque, without placing emphasis on the sheet feeding tension, and by changing the touch roller to the pull-out roller. Since the rollers were linked with slight speed changes and an intermediate tension section was provided between both rollers, the feeding tension could not be smoothly changed to the winding tension. Therefore, according to the second aspect of the invention, the sheet roll is wound up via the touch roller which has a non-return action by the support mechanism and is actively driven in conjunction with the pull-out roller at a slightly variable speed. It becomes possible to prevent deformation of the sheet roll and to wind up the sheet while adjusting the sheet tension immediately before winding, and it is possible to obtain a higher quality wound sheet roll.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG. 1 is an explanatory diagram of an embodiment for explaining the principle of the first invention, FIG. 2 is an elevational view of a specific embodiment of the first and second inventions, and FIG. The figure is an enlarged plan view of the vicinity of the support arm in FIG. 2, FIG. 4 is an explanatory diagram for explaining the principle of the second invention, and FIG. 5 is a diagram similarly showing changes in sheet tension. DESCRIPTION OF SYMBOLS 10...Touch roller, 11...Touch roller support mechanism (support arm), 20, 20'... Pull-out roller of sheet feeding device, 30... Take-up shaft drive device (motor), 13...Return check mechanism (free running clutch) , 15a, 16a... Cone pulley of the fine change speed interlocking mechanism, 24a... Also the belt, 40... Fine change speed interlocking mechanism.

Claims (1)

[Scope of Claims] 1. A shaft-driven winding system comprising a touch roller that rotates in contact with the surface of the sheet roll being wound and moves away from the winding shaft as the winding diameter increases, and a rotational drive device for the winding shaft. A shaft-driven winding device, characterized in that the device is equipped with a touch roller support mechanism that allows the touch roller to move in a direction away from the winding shaft, but does not allow movement in the opposite direction, during winding. 2. A touch roller that rotates in contact with the surface of the sheet roll being wound and moves away from the take-up shaft as the winding diameter increases, and a sheet feeding device that sends the sheet pulled out from the base paper roll by a pull-out roller between the touch roller and the sheet roll. and a rotational drive device for the winding shaft, the touch roller is allowed to move in a direction away from the winding shaft during winding, but is not allowed to move in the opposite direction. A shaft-driven type characterized in that the sheet feeding device includes a touch roller support mechanism, and the sheet feeding device includes a finely variable speed interlocking mechanism that slightly changes the circumferential speed of the touch roller relative to the circumferential speed of a pull-out roller that pulls out sheets from the base paper roll. Winding device.