JPS59230941A - Rolled paper supply device - Google Patents

Abstract

PURPOSE:To make it possible to surely remove any slack in a rolled paper upon stopping of supply of the rolled paper with no bad affection being effected to the rolled paper, by making the free end part of a slack take-up member which is rotatably secured at its the other end, in press-contact with the rolled paper which is paid out. CONSTITUTION:With the leading end part 1a paid out from a rolled paper 1 being held between a pair of rolls 8, 9 the paper is supplied by rotating either one or both of the rolls 8, 9 in such a condition that braking torque is exerted to the rolled paper 1 without being made in contact with the surface of the rolled paper 1. In this rolled paper supply device, the free end part 15 of a slack take-up member 10 which is rotatably secured at the other end, is made in press-contact with the rolled paper 1 which is paid out. With this arrangement, any slack in the rolled paper with no bad affection, etc, being effected to the rolled paper, thereby paper-jamming due to oblique feeding, zigzaging and deviation of the rolled paper caused by paper-slacking may be prevented.

Description

[Detailed description of the invention]

The present invention relates to a roll paper feeding device that feeds roll paper to a device intermittently as needed. Conventional paper consists of sheets cut to a constant length and width, and a constant η]
Width σ] There is a roll of paper wound around a paper roll core, but since the sheets are cut to a certain size, they are more expensive than roll paper E. In addition, Kawakaze dimensions are divided into A row, B row, letter size, legal size, and 71 types, but A row,
In column B, if the numbers differ by 1, the dimensions of the larger paper with the smaller number G in the same column correspond to the smaller size paper with the larger number, so σ
] If you use roll paper, you can get two different sizes of paper just by changing the cutting size and doubling or halving it, so it is cheaper to use roll paper than sheet paper, and it is cheaper to prepare paper.
This is preferable because there are fewer types. For this reason, conventionally a roll paper feeder as shown in FIG. 1G has been used. Roll paper 01 & roll core G (not shown) is wound in a spiral shape, and the roll core is fitted onto shaft 02- [this shaft 02σ] and held between 7 langes 03 at both ends, and both ends of the shaft 020 are fitted with bearings. The shaft 02 is held by a push plate 08 which is placed in the notch 06 of the frame 05 through the shaft 04 and is biased by a spring 07, and is pivoted at the pivot point 0 and fixed to the base end of the tough flake plate 09. A spring 011 is tensioned between the parts, and the force of the spring 011σ causes the friction piece 010 at the tip of the brake plate o9 to
is now pressed against the surface of the roll paper 010. T T, = Roll #: The leading edge of the roll paper 01α fed out from o1 is sandwiched between a pair of upper and lower pinch rolls 012 and a feed roll 013, and by rotation of the same feed roll 0130, the roll paper 0 is reached. Mapay'lfh a
It is designed to be In this type of roll paper feeding device, the paper can change from the paper feeding state to the stopped state.

[When switching, the roll paper 01 tries to continue rotating due to rotational inertia, but is stopped by the frictional resistance between the friction piece 010 and the surface of the roll paper o1, and the roll paper 01σ]
The leading edge part 01ασ] is prevented from sagging, and paper jams that occur due to skewed feeding, meandering, and deviation σ] of the paper due to this sagging are attempted to be prevented. However, the inertia factor of roll paper 01 fluctuates widely depending on the inside of the paper and the remaining amount of roll paper used, and the frictional resistance force with friction piece 010 changes significantly, causing the roll paper to roll roughly. The spring force of the spring 011 changes due to the change in diameter, and this causes the frictional resistance to change, so that the slack in the leading end portion 01α of the roll paper could not be completely removed. 'Eta roll paper 01'a? If the friction pieces 010 are pressed together strongly, this friction will generate paper dust from the surface of the roll paper package 1 and change the properties of the paper surface, reducing the development transfer efficiency in the copying machine. Invention σ] Purpose The present invention relates to improving the roll #l and paper feeder CO which overcomes such difficulty in ignition, and its purpose is to avoid any adverse effects on the roll paper. The object of the present invention is to provide a roll paper feeding device that can reliably remove the slack of the roll paper when the roll paper feeding is stopped. A roll that feeds paper by rotating one or both of the pair of rolls while applying a braking torque to the roll paper without contacting the surface of the roll paper. ft, an example of a slack absorbing member having one end rotatably held on the rolled paper, which is shown in FIGS. 2 and 3, will now be described. The roll paper 1 is wound into a spiral shape with a roll core G (not shown), and the roll core is integrally fitted onto a shaft 2. Also, seven langes 3 are fitted with splines at both ends of the shaft 20. A sleeve 41 integrated with the flange 3 is placed from above on the pivot support 5 integrated with the frame.
The base end of the brake piece 6σ is pivoted to be able to swing up and down,
A spring 7 is tensioned so that the sleeve 4 is clamped between the in-phase branch 5 and the brake piece 6 to apply braking to the roll paper 1. Roughly above and to the left of the roll paper 1, a pair of upper and lower vinyl rolls 8 and a feed roll 9 are arranged parallel to the roll paper 1, and the leading end 1 of the roll paper is sandwiched between the rolls 8 and 9.
A is cut off by a motor (not shown). A slack absorbing member 10 is pivotally supported at both ends of the shaft 2 of the roll paper 1 through bearings 11 to support pieces 12 and 12, respectively, so as to be able to swing freely around the shaft 2. , 12 are held at a constant interval by a spacing member 13, and a pressure contact piece 15 is fitted on the outside of the spacing member 13 via bearings 14, 14Y. The slack absorbing member 10 has a pressure contact piece 15, which is a free end thereof, between the roll paper 1 and the leading edge of the roll paper due to gravity. Therefore, when there is no slack in the leading edge 1α of the rolled paper between the rolled paper 1 and the feed roll 9, the leading edge 1α of the rolled paper is It is planar or &-only the portion of the slack absorbing portion IO that is in contact with the pressure contact piece 15 is slightly bent, and the rest is planar. However, if, for example, the feed roll 9 rB stops rotating from a state in which paper is being fed and paper feeding is stopped, even if a braking force is applied to the roll paper 1 by the brake lever 6, the roll paper 1 is unable to stop suddenly due to its large inertia factor, and slack occurs at the tip g1α of the roll paper between the roll paper 1 and the feed roll 9. However, due to its power, the slack absorption member 10 is The back side of the roll paper front end 1α is brought into pressure contact between the roll paper front end 1α and the roll paper 1, and the slack is absorbed, and the roll paper front end 1α becomes tensioned. state can be maintained. Mata roll paper 1 [When it is wound in a spiral shape,
Because the surface that comes into contact with the atmosphere is narrow, it remains dry.
As the paper feeding stop time elapses, the leading edge portion 1a of the Tyrol paper absorbs moisture in the atmosphere, expands and sag, but the slack absorbing member 10 is always under the influence of willpower.
Due to the action of the swinging moment, the slack in the leading end 1cL of the rolled paper due to such causes is absorbed by the pressing force against the leading end 1α of the rolled paper. In this way, the leading end 1α of the roll paper can always be maintained in a tensioned state by the slack absorbing member 10. In the paper feeding state, the leading end 1α of the roll paper does not displace to one side, and the vinyl roll 8 and the There is no oblique inclination with respect to a plane perpendicular to the center line of the eed roll 9, no oblique feeding, no meandering, no shifting, and paper jams are prevented. In the embodiment described above, at the contact portion between the slack absorbing member 10 and the leading end portion 1a of the roll paper, the leading end portion 1a of the roll paper slides on the surface of the pressure contact piece 15.15 of the slack absorbing member 10, so that the pressure contact is not made. It is preferable that the surface of the piece 15.15 is smooth and has a small coefficient of friction, but in some cases, the sliding surface of the pressure contact piece 15 may have an extremely thin protrusion or A groove may be formed, and with this configuration, deviation of the leading end portion 1α of the roll paper from the paper feeding direction is suppressed. Roughly speaking, in the embodiment described above, the slack absorbing member 10 was adapted to absorb the slack of the roll paper leading end 1a by the pressure contact force due to the swinging moment based on its own weight, but the slack absorbing member IO' is moved in the counterclockwise direction. This may be absorbed by using a spring force that causes the 111' oscillation. In the above embodiment, 2) the absorption member 10?
, roll paper] swings on the shaft! U f+', G:
However, as shown in Figure 6, it is supported by the shaft of the feed roll 9, and the feed draw is low (near 13), and the roll tip γ1aQ is free to absorb 1160 sag. Kaibu pressed pressure welding M -!t b tori), tW to the fourth and first round
Combined with a gene force that lifts the mold sag absorbing material 16,
You can also strain it with Giseki to absorb it. , Effects of the Invention In the present invention, the above-mentioned roller outlet f1
．． - When the roll is placed between a pair of rolls and a braking torque is applied to the same roll paper without contacting the surface of the roll paper, one or both of the pair of rolls is The temperature of the paper feeding device that feeds paper by rotating the
Since the free end of the slack absorbing member was pressed against the rolled paper, the leading end of the rolled paper became slack due to some reason. Even if such a situation occurs, this slack can be absorbed by the roll assembly, so it is possible to prevent paper jams due to slanted feeding, meandering, and deviation of paper due to slack. In addition, in the present invention, since the braking torque 2 is applied to the roll paper without contacting the roll paper surface, it is possible to prevent the properties of the roll paper surface from changing, and also to prevent the generation of paper dust. Paper processing of φ0 can be carried out smoothly.

[Brief explanation of the drawing]

Fig. 1 is an exploded schematic perspective view of a conventional roll paper feeding device, Fig. 2 is a schematic perspective view showing an embodiment of the U-roll paper feeding device according to the present invention, and Fig. 3 is a slack absorbing member. 4 and 5 show a state in which the leading end of the roll paper is not excessively fed out from the roll paper and a state in which the excess G is cut off. Illustrated side view,
Figure 6 1. j FIG. 7 is a side view of another embodiment. J...roll paper, 2.shaft, 3...7 runci,
4... Sleeve, 5... Pivotal part, 6... Brake piece, 7... Spring, 8... Vinci roll, 9...
Feed roll, 10...Sag absorption member, 11...
・Bearing, 12... Support piece, I3... Spacing material, I4
... Bearing 15 ... Pressure welding piece, 16 ... Suspended type sag absorber. Agent: Patent attorney Ryo E

Claims (1)

[Claims] The tip of the roll paper fed out from the roll paper is sandwiched between a pair of rolls, without touching the surface of the roll paper. In a roll paper feeding device that feeds paper by rotating both rolls, the free end of a slack absorbing member that is rotatably held at one end of the rolled paper. A roll paper feeding device characterized by a pressure-contact structure.