JPS60131276A - Sheet feeder with sheet-cutting mechanism - Google Patents

Abstract

PURPOSE:To enable a sheet to be fed irrespectively of whether or not the sheet is cut, by a construction wherein a plurality of roll members having different diameters are fitted to the same shaft as driven rollers for clamping and feeding a sheet in cooperation with driving rollers, and a rotary cutter blade for cutting the sheet is fitted to the same shaft. CONSTITUTION:When the sheet is not to be cut, large-diameter roll members 17 are brought into contact with the driving rollers 13 through the sheet 7, while the rotary cutter blade 12 and small-diameter roll members 18 are not brought into contact with the sheet 17, and the sheet 7 is fed. When the sheet is to be cut, shafts 15, 16 are brought close to each other, namely, the driving rollers and the driven rollers are brought close to each other, so that the small-diameter roll members 18 are brought into contact with the driving rollers 13 through the sheet 7, and the cutter blade 12 is brought into contact with the sheet 7. In this case, the large-diameter roll members 17 are brought into contact with the driving rollers 13 through the sheet 7 while being deformed by being pressed by the rollers 13. Accordingly, the sheet-cutting mechanism can be constructed as one body with the feeding mechanism, and the whole mechanism can be reduced in size.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet feeding device for conveying a sheet material such as paper, and more particularly to a sheet feeding device having a function of cutting the sheet material as necessary.

Prior Art Conventional sheet feeding devices with sheet cutting mechanisms have several structural or functional problems that must be resolved. For example, in the apparatus shown in FIG. 1, the sheet is cut by rotary blades 1.2 mounted on shafts 5 and 6 that are separate from the shafts of the drive roller 3 and driven roller 4 that convey the sheet 7 while holding it there. I am doing it. This device can convey and cut sheets at the same time, or can only convey sheets by separating the rotary blades and the shafts 5, 6 to which they are attached from the rollers 3, 4. However, since the sheet cutting mechanism is provided separately from the sheet conveyance rollers, there is a drawback that the machine becomes larger and more complicated. Another conventional device is one in which rotary blades 1 and 2 are provided on the shafts of a driving roller 3 and a driven roller 4, as shown in FIG.

Although this device avoids increasing the size of the device, it cannot only transport the sheet without cutting the sheet.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a sheet feeding device that eliminates the above-mentioned conventional drawbacks, can transport sheets regardless of whether or not they are cut, and does not require a complicated mechanism or space. With the goal.

Structure of the Invention The sheet feeding device of the present invention uses a plurality of roll members having different diameters attached to the same shaft as a driven roller that grips and conveys the sheet together with a driving roller, and also has a sheet-cutting roller attached to the shaft. It is characterized by the attachment of a rotating blade. Another feature of the apparatus of the present invention is that among the plurality of roll members having different diameters attached to the driven roller, the roll member with the largest diameter is made of a deformable material. Further, in the sheet feeding device of the present invention, the driving roller and the driven roller are relatively movable. 1. That is, when the sheet is not being cut, these rollers are located relatively apart from each other, and only the large-diameter four-wheel member of the roll members attached to the driven p-roller cuts the sheet. contact with the drive roller through
The small-diameter roll member and rotating blade do not come into contact with the sheet. However, when cutting the sheet, the drive roller and the driven roller come closer together, and the large diameter roll member is pressed and deformed by the drive roller and comes into contact with the drive roller, while the small diameter roll member also cuts the sheet. It is adapted to come into contact with the drive roller through. Moreover, at this time, the rotary blade attached to the driven cylinder is positioned so as to be in contact with the sheet so as to be able to cut the sheet.

With the configuration described above, the present invention provides a highly flexible sheet feeding device that has a relatively simple structure but also has sheet cutting and conveying functions. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the configuration and effects of the present invention, the present invention will be described below with reference to embodiments shown in the drawings.

Embodiment FIGS. 3 and 7 show an embodiment of a sheet feeding device equipped with a sheet cutting mechanism according to the present invention.

In the figure, reference numeral 15 denotes the shaft of a drive roller, which is driven many times by appropriate means.

A roll member 13 is attached to the drive shaft 15 and the drive shaft 15 is attached to the drive shaft 15.
In FIG. 6, a driving roller is formed from a large number of short roll members 13 having the same diameter. However, even in the device of the present invention, the drive 2 itself may be formed from a relatively longer four-wheel member than shown in FIGS. 1 and 2. A plurality of roll members 17 and 18 having different diameters are mounted on an axis 16 parallel to the axis 15 of the drive roller.
is installed. The number of these roll members is not particularly limited, but at least one pair (-) of large diameter roll members 17 should be provided at a distance corresponding to the width of the sheet to be conveyed. be. It is preferable that at least one pair (two) of small-diameter roll members 18 are disposed between a pair of large-diameter roll members. Driven roller shaft 16
A circular blade 12 is further attached to the holder. This blade will cut the sheet 7 that comes into contact with the nuclear force by rotating in accordance with the rotation of the shaft 16. The diameter of the rotary blade 12 must be smaller than the diameter of the large-diameter roll member 17 so that the small-diameter roll member 18 is also larger. Although it is generally preferable to attach the rotary blade 11 to the shaft 15 of the drive roller at a position corresponding to the rotary blade 12, it is also possible to cut the sheet by attaching the rotary blade only to the driven shaft 16.

The sheet feeding device of the present invention is characterized in that a rotary blade and a roll member with a different diameter are attached to the shaft of the driven roller 14, and the large diameter roll member 17 is made of a deformable material (for example, rubber). The structure is shifted, and the driving roller and the driven roller can be moved relative to each other by suitable means (not shown).

Thus, as shown in FIG. 3, when the sheet is not cut, the large-diameter roll member pair 7 comes into contact with the drive roller 13 via the sheet 7, but the rotary blade 12 and the small-diameter roll pair Member 18 does not contact sheet 7 (i.e.
The sheet 7 is conveyed by the rotation of the drive roller 13 and the large-diameter roll member.

Next, when cutting the sheet, the driving roller and the driven roller are brought closer together (that is, the shafts 15 and 16 are brought closer together), and the small diameter roll member 18 comes into contact with the driving roller through the sheet 7, Further, the rotary blade 12 is brought into contact with the sheet 7, that is, brought into a state where it overlaps with the rotary blade 12. At this time, the large diameter roll member 17 is pressed and deformed by the drive roller 13 and comes into contact with the drive roller 13 via the sheet 7 . In this state, the drive roller 13
When the sheet 7 is rotated, the sheet 7 held between the roller, the small-diameter roll member 18, and the large-diameter roll member is conveyed and cut by the rotary blade. At this time,
The large-diameter roll member made of a deformable i-type material does not interfere with the conveyance of the sheet, but it provides some resistance to the sheet, thereby applying a certain amount of tension to the sheet, thereby facilitating the cutting of the sheet. It also has functions. In addition, the feed speed during sheet conveyance that also serves as cutting is slower than the feed speed during non-cutting as shown in Figure 3, so there is a difference between before and after switching between sheet cutting and non-cutting. Since the distance between the sheets (corresponding to d in FIGS. 1 and 2) is large, this switching can be easily performed.

Note that during non-cutting when the small diameter roll member or rotary blade does not contact the sheet, even if the drive roller rotates at a constant speed,
The force of contact between the large diameter roll member and the drive roller (i.e.
It will be understood that the sheet feeding speed differs depending on the degree of deformation of the large diameter roll member. Therefore, the sheet feeding device of the present invention also has the function of appropriately controlling the sheet feeding speed.

Effects of the Invention As is clear from the above description, the sheet feeding device of the present invention is a highly practical device in that it can simultaneously cut sheets as required. Moreover,
The apparatus of the present invention has a sheet cutting mechanism and a conveyance mechanism integrated, so it is compact as a whole, and
It can be manufactured easily at low cost.

[Brief explanation of the drawing]

1 and 2 are perspective views of a conventional sheet feeding device. FIG. 3 is a perspective view of an embodiment of a sheet feeding device equipped with a sheet cutting mechanism according to the present invention, showing the state when the sheet is not cut, and FIG. FIG. 3 is a perspective view showing how a sheet is transported and cut using a sheet feeding device. 7: Sheet to be conveyed 12: Rotating blade 13: Drive roller 17: Large diameter roll member 18: Small diameter roll member Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 2

Claims (1)

[Scope of Claims] A sheet feeding device comprising a sheet cutting mechanism that conveys a sheet while sandwiching it between a driving roller and a driven roller and cuts the sheet as necessary, wherein the driven roller is Consisting of a plurality of roll members with different diameters attached to the same shaft, a rotary blade for sheet cutting is further attached to the shaft, and the larger diameter roll member among the plurality of roll members is deformable. The driving roller and the driven roller are relatively movable, and when the sheet is not being cut, the large diameter roll member contacts the driving roller through the sheet, but the small diameter roll member is made of a strong material. The roll member and the rotary blade are configured not to contact the sheet, and when cutting the sheet, the drive roller and the driven roller move closer together, and the large diameter roll member is pressed by the drive roller. The small diameter i-
The rotary blade is in contact with the driving roller through the book sheet and is capable of taking a position such that the rotary blade can come into contact with the sheet and cut the sheet. Sheet feeding device. □. ζ