JPS58104842A - Slip feeder - Google Patents

Abstract

PURPOSE:To surely prevent the supply of other following slips in a slip feeder for an optical character reader or the like, by bringing the brake shoe of a plural-slip-supply prevention brake into contact with a feed belt under prescribed pressure. CONSTITUTION:Stress is applied to the brake shoe 25b of a two-slip-supply prevention brake 25 by a helical torsion spring 25c so that the brake shoe is brought into pressure contact with a feed belt 5 when a slip is supplied. A material with a high coefficient of friction is molded on the surface of the brake shoe 25b. The friction coefficient of the material is higher than that of the surface of the slip but lower than that of the feed belt 5. If plural slips are simultaneously conveyed, friction is caused on the second and other following slips between the feed belt 5 and the brake shoe 25b so that the second and other following slips are prevented from being supplied.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a form feeding device in an optical character reading device, an optical mark reading device, or the like.

Issued by @O Technical background Among optical character reading devices, optical mark reading devices, etc.
Unlike pagely finishing, pagely finishing is generally required to process a large number of sheets per minute. For this reason, various types of paper feeding mechanisms for these devices have been developed to realize accurate feeding. Specifically, there are two mechanisms: a mechanism that feeds paper by adsorption to a vacuum belt or rope 2, and a mechanism that feeds paper by pressing it against a rubber roller 2 with a high frictional force at a constant pressure. Mechanisms for preventing double-sheet feeding in these paper feeders include (1) a constant throat gear, a book with a constant pull, and (2) a mechanism using a reversing belt or roller.

Problems with the Background Art - However, the double-sheet feeding prevention mechanism described in (2) above is not suitable for documents with different paper thicknesses, and the mechanism (2) also has the problem that it cannot reliably prevent double-sheet feeding. Ta.
□ Purpose of the Invention This □ invention has been made in view of the above circumstances, and an object thereof is to provide a form feeding device that can accurately prevent double-sheet feeding of forms.

Summary of the Invention The present invention provides a form feeding device for feeding forms, etc.
A reversing roller is provided which rotates in the opposite direction to the ninth O feed belt which is supplied with driving force and feeds forms, and a roller is provided at a position opposite to the reversing p-roller with a predetermined O pressure contact force. K0 reversal p-ra and the above four-ra are attached to the luxi, a part of which is the above-mentioned eye-ya-ra and the predetermined 0! E
A brake member that can be brought into contact with lI force is provided to prevent two sheets from being fed when feeding sheets.

Embodiment of the Invention Hereinafter, an embodiment of this paper feeder W14 will be explained with reference to the drawings.
It is a plan view〉, and Figure 2 is a side drawing of 0 diagrams, 1 is ho, no odd, 2 is a form, 1 is a zo, shi to move form 2
It is a play-F.

t*4. An assist belt 5 is used to assist in feeding the form IO, and 5 is a tweed pel F for feeding the form 2 to the conveyance system. A control mechanism is provided so that the feed belt j can be attached to and detached from the form 2. This control 1 mechanism is a push magnet Hasstoy II.
# A first armature 5b1 that is locked to the armature 5b1 A spring 5c that has one end connected to this armature 5b and the other end fixed.
, a rigid arm 6 connected to the armature 5b and provided with a feed belt 50 rotating shaft and a drive shaft 5.
d.

A pummel roller 5h attached to the drive shaft 5 is also configured. Further, 6m and 6b are reversing pummel rollers which are disposed parallel to and opposite to the feed roller 6 to prevent sheet feeding, and 1 is a pummel roller for feeding the form 2. Furthermore, 24m
, J4btj: This is a photoelectric switch for controlling the conveyance of the form 2, which is disposed opposite to the pifferade roller 5h.

In the paper feeding device 1, the sheets 2 stacked on the tray 41 are constantly pressed against the assist belt and the feed belt 5 by the shutter plate 3 with an appropriate pressure. When the sheet feeding of the form is stopped, the driving force of the feed belt 5 is turned off, and the rotation of the driving groove is stopped. In this state, the belt 4-r is energized and pushed in the direction of the arrow 11f by the magnet 5a, and is in good condition. Therefore, the feed belt 5 is moved by the arm 54 in a direction away from the form 2 using the shaft 5 as a fulcrum, and is in a circular shape 11.

The movement angle at this time is shown as - in FIG.

On the other hand, when the form 0@paper command is output from a control device (not shown), ``Gosh!''! Dunnett la is demagnetized, spring 1, yoshi, push S'a & madane y) ja inside O amachi,
A rotational force is applied to the arm 54 via J'bt.

Then, the arm 5- uses the shaft I as the fulcrum, and the arm 5-
f 4 le) Angle #- in the direction in which 5 touches the form jKII
The feed belt ξ is the form 1flcXf cylinder I@
Contact with constant pressure due to O tensile force. Then, the power of the driving peak (not shown) is driven through the clasps and chis) 1.
When the transmission is transmitted to
will be carried out.

The nine feed rYtL forms are held between the pummeler 5h, which is constantly rotating under driving force, and the conveyor belt 7, and are conveyed to a reading section (not shown). At this time, when the leading edge of the form 2 is detected by the photoelectric switches 24m and 24bK, the control section (not shown) starts! , shi.

By energizing the magnet 5a, disengaging the feed belt 5, demagnetizing the electromagnetic clutch (not shown), and energizing the electromagnetic brake, the driving force from the drive cage is cut off and the feeding of the next form is stopped. let

FIG. 413 is an enlarged plan view showing details of the double-sheet feed prevention mechanism in the paper feeder), and FIG. 4 is a perspective view of the brake section side of the double-sheet feed prevention mechanism. In FIG. 3, 6e is an arm to which reverse shim roller #bK is attached, and 6d is a tension coil panel to which arm 6.Km is attached at one end and fixed at the other end. Also, Figures 3 and 4
In the figure, kl is a brake member for preventing two sheets from being fed, and this brake member 11Fi, hinge 2j&, placki a-ash, Nejirikoi #3 screw 21@, and bearing via 11
It is composed of oak.

In the double-sheet feed prevention mechanism configured like a runner, the fed form is first held between the reverse rollers* and IIbk.

The friction coefficient of the reverse rotation row 26m and the gbol 1 surface is set to be lower than the friction coefficient of the surface of the paper feed belt 50, and higher than the friction coefficient of the surface of the form. The reversing roller 6a receives power from a drive system (not shown) and is constantly rotated. On the other hand, the reversing roller 6b is connected to the tensile coil passer*idK via the arm 6c.
aK pressure contact. Note that the surface of the assist belt 40 shown in the first ssP and FIG. 2 is always a form jKI! Because they touch each other, the coefficient of friction is set to be low enough to allow slipping. Then, when two sheets of paper are fed, 1
,' □, 1゜First, two documents are held between the reverse rollers 6a and #bK, and the second (lower) document is held by the reverse rollers al (to be in pressure contact, Due to the frictional force with the feed belt #a, the sheet receives a reverse force and is forced to run backwards or stop.For the first (upper) sheet, the frictional force of the feed belt 5 is sufficiently high, so the frictional force with the sheet is paper is fed.At this time,
The reversing roller 6b is cut off from contact with the reversing roller 6b,
It rotates sequentially as the first sheet travels.

In addition, even if two or more sheets are about to be fed, the brake member 11 for preventing double sheet feeding, which is installed alongside the reversing rollers 6&, 6b and the direction perpendicular to the direction of travel of the sheet, will be activated. Fortunately, it is possible to prevent the second and subsequent sheets from being fed.

That is, the hinge 25h is fixed to a part of the wall surface of this device that is perpendicular to the surface in the sheet feeding direction of the form, and the plate xsb is twisted so as to come into pressure contact with the feed belt 5 when feeding the form. It is subjected to stress by the coil spring 25-. In addition, a member with high frictional force is molded on the surface of the feed belt, -zsb], and the relationship between the coefficient of friction is as follows:
Since the surface of the rib is the 11th side of the form, if two or more forms are fed at the same time, the 22nd and subsequent forms will be fed by the feed belt 5 and the Sliding is performed between 0 and 0, and feeding of the second and subsequent forms is prevented.

In the above embodiment, a case has been described in which the form feeding device of the present invention is applied to an optical character reading device, but it goes without saying that it can also be applied to a paper cable conveying device, such as a banknote counter.

Effects of the Invention As described above, according to Jin's invention, it is possible to provide a form feeding device that can accurately prevent sheet feeding.

[Brief explanation of drawings]

1E is a plan view of a form feeder O according to an embodiment of the present invention;
2nd is a side view thereof, FIG. 3 is an enlarged plan view showing details of the double-sheet feed prevention mechanism in the same embodiment, and FIG. 4 is a brake member in the same embodiment. FIG. 5...Feed belt, If @ e 61)...
Reverse tit--R, L...brake member to prevent double sheet feeding.

Claims (1)

[Claims] An O-feed belt for feeding documents, a reversing roller to which a driving force is applied and rotating in a direction opposite to the rotational direction of the feed belt, and a driven roller that is in opposing contact with the reversing roller with a predetermined pressing force. and a braking member for preventing two-sheet feeding, which is attached to the reverse feed belt and the driven feed belt, and a part of which is in contact with the feed belt with a predetermined pressing force. A form feeding device for