JPS62185652A - Conveyer for sheetlike material - Google Patents

Abstract

PURPOSE:To get rid of a waste of suction of a roller as well as to make the promotion of efficiency in suction conveyance of a sheetlike material attainable, by making those parts other than a sheetlike material suction part of a suction feed roller so as to be covered with an endless belt circulating solidly with rotation of the roller. CONSTITUTION:An endless belt 7 is installed in the circumference other than a part attracting a scanning sheet 4 of a suction feed roller 6, while this belt 7, as one example, is suspended on a driven roller 8 extending in a parallel direction with the suction feed roller 6, and it covers the circumference other than a part where the suction feed roller 6 attracts, whereby it circulatively moves in an arrow direction solidly with rotation of the suction feed roller 6. Thus, since the endless belt 7 covers a suction hole 6a in a position, not performing suction of the scanning sheet 4, among suction holes 6a of the suction feed roller 6, this roller 6 comes to nothing doing the suction at a part where no influence is exerted on the scanning sheet 4, so that it effectively attracts the scanning sheet 4 alone.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a conveying device for a sheet-like object that is conveyed by a conveying roller, and particularly relates to a conveying device that can accurately convey a sheet-like object at a constant speed. It is something.

(Technical Balance of the Invention and Prior Art) As is well known, a conveyance device that conveys a sheet-like object by means of conveyance rollers extending in the width direction of the sheet-like object is used in the divine device, and it It is also used as a stage for conveying a scanning sheet in light beam scanning 8!iv1 of beam scanning recording devices and various light beam scanning reading devices.

Among the above-mentioned conveyance devices, the sheet conveyance device used in the light beam scanning device as described above moves the sheet 1 to 1-like object in the scanning position of the light beam and performs sub-scanning. When used as a means, it is required that the scanning sheet be conveyed at a constant speed to the high quality melon. For this reason, an apparatus is available in which the above-mentioned conveyance roller is an adsorption conveyance roller, and the sheet-like object is conveyed by the rotation of the roller while sucking and nudging the sheet-like object, thereby improving the accuracy of conveyance of the sheet-like object. . However, since the above-mentioned cola is hollow and has suction holes on almost the other side, suction is carried out in areas other than the part where the sheet-like material is suctioned, and the suction Effectively adsorbs wasteful and sheet-like objects
There is a disadvantage that it is difficult to obtain 1':r.

(Objective of the Invention) The present invention has been made in view of the above-mentioned problems. - To provide a conveyance device that can efficiently convey sheet-like objects one by one by eliminating wasteful suction.
The target is b.

(Structure of the Invention) The sheet-like material conveying device of the present invention includes a suction conveyance roller,
The endless bell 1, which is suspended from the driven roller of I + A, is suspended around the surrounding area excluding the part that attracts objects like Sea 1 to i+A, and is circulated integrally with the rotation of the suction roller and the conveyor roller. 1) It is a characteristic that is covered by ~.

In other words, with J5 in the device of the present invention, perform suction on the suction 1 general feed roller and use the suction holes [, upper,
Since the T-node dress bell 1~ is completely covered, the suction conveyance roller can efficiently suction 11 only the sheet 1~-like object.

Kumi no) Type 1 'E, +! > Hereinafter, the implementation method of the present invention will be explained with reference to the drawings.

FIG. 1 is a schematic diagram showing a light beam scanning device equipped with a sheet conveyance device according to an embodiment of the present invention;
The figure is an enlarged sectional view of the main part.

A light beam 2 emitted from a Beam X light source 1 rotates at high speed in the direction of the arrow a (injects into the Q internal device 3, is deflected (14), and passes through an fθ lens 9 as a scanning lens in the direction of the arrow). The main scan is repeated repeatedly.

Further, below the +7ff optical deflector 3, the scanning sheet 4, which is a sheet 1, is conveyed along the support surface 5a of the support stand 5 in the direction of arrow B, which is substantially perpendicular to the main scanning direction. Then, the beam 2 two-dimensionally scans the scanning sheet 4 that is conveyed (sub-scanned) as described above.

The support stand 5 is provided with a sheet WI feeding storage section 5Δ whose one end opens onto the support surface 5a. A suction conveyance roller 6 is provided which can be used for transporting. The scanning sheet 4 is conveyed in the direction of the arrow B as described above by the suction conveyance roller 6 rotating in the direction of the arrow. J
, , suction conveyance []-ra 6 (yo, the scanning sheet 4 can be conveyed with precision at a constant speed while maintaining the flatness at the scanning position of the light beam 2, J: sea urchin) , it conveys the scanning sheet 4 while adsorbing it.J<
I suck it! [The feed roller 6 is hollow, and the -8
It has a small number of suction holes 6a on the entire surface, and has two holes (not shown).
By suction means such as a bomb, through the four suction holes 6a,
Suction the scan sheet 5.

By the way, since this suction conveyance []-ra 6 (J1) suctions the scanning sheet 4 while rotating, there is a H on almost the entire surface thereof.
There are several stages of suction holes 6a, but it is time to actually perform suction! -4 adsorption hole Ga1. :4p, and the other suction holes perform suction uselessly (-), resulting in the inconvenience that the suction force against the scanning sheet 4 becomes weak.

In the embodiment, an endless belt 7 is provided around the suction conveyance roller 6 except for the portion where the scanning sheet 1 is suctioned. This endless belt 7 is, for example, a 4-piece suction conveyor. The cover and suction i'7'a integrally move with the rotation of the feed roller 6 by 1 lr + ring in the direction shown by the arrow in FIGS. 1 and 2.

In this way, the endless belt 7 carries out suction of the measuring sheets 1 to 4 behind the suction 1 conveying roller 617) I suction hole 6a and the suction hole 6a located at position γ1. As a result, the suction conveyor 1-1-ra 6 does not apply suction to a part that affects the scanning sheet 4, and can efficiently suck only the scanning sheet 4. Ru.

As described above, since the scanning sheet/It is conveyed while being efficiently attracted by the suction conveyance roller 6, the precision of the 112 feeding (sub-scanning) of the scanning sheet is extremely high. can perform two-dimensional scanning with a light beam with high precision.

Hereinafter, the sheet material conveyance device of the present invention has been described using an example in which the device is installed in a light beam scanning device. However, the device of the present invention is a light beam scanning device! In addition to the above, it can be used in 6 different devices, and if the device is equipped with J3, it will be able to efficiently suck up sheet materials. No. 1, it has the effect of increasing the accuracy of sheet-like material conveyance.

〈9th Song of the Invention〉 - As explained, in the conveying device for sea mill-like objects of the present invention, an endless belt is installed around the suction conveying roller. Only the portion of the conveyance roller that comes into contact with the sheet-like object performs suction, and suction can be efficiently performed to realize high-precision conveyance of the sheet-like object.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a light beam scanning device equipped with a sheet-like material conveying device according to an embodiment of the present invention, and FIG. 2 is a partially enlarged sectional view of the scanning device. 4...Scanning Sea I~ 6...1 Extraction Transport 1 Erroller 6a...Neck Suction Hole 7...'' - Endless Bell 1-8...Conventional Roller

Claims (1)

[Claims] In a sheet conveying device for conveying a sheet by a conveying roller extending in the width direction of the sheet, the conveying roller is hollow and has suction holes on substantially the entire surface, and the sheet is The periphery of the suction conveyance roller, excluding the part that adsorbs the sheet-like object, is suspended by a plurality of driven rollers parallel to the suction conveyance roller, and the suction conveyance roller A conveying device for a sheet-like material, characterized in that it is covered by an endless belt that circulates integrally with rotation.