JPS62180831A - Attracting device for sheet material - Google Patents

Abstract

PURPOSE:To enable a sheet material of different size to be attracted, by forming a suction hole group, arranged corresponding to the minimum size of the sheet material to be attracted, and a suction hole, selectively arranged corresponding to the sheet material of different size, on an attracting surface of an attracting means. CONSTITUTION:An attracting head 10 generates a negative pressure in a negative pressure chamber in a housing 13 by driving a suction fan 12, and a document 14 is attracted through suction holes of attracting members 16. Here the attracting member 16 forms on its attracting surface 25 respectively a suction hole group 26, arranged corresponding to the document 14 of minimum size B5, and a suction hole 27 selectively arranged corresponding to a document 14a of different size, for instance, size A4. And the attracting member attracts the document 14 of size B5 by the suction hole group 26 while the document 14a of size A4 by concurrently using the suction hole group 26 and the suction hole 27. Accordingly, the documents 14, 14a of different size can be surely attracted sheet by sheet respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a sheet body suitable for use in, for example, a dry copying machine, a device that conveys sheet bodies such as facsimile originals or printed layer paper one by one. Regarding an adsorption device.

In conventional technology such as facsimile or dry copying machines,
A device r11 (generally referred to as an ADF) that automatically conveys one or more documents to be copied or transmitted to a reading surface for optically reading the document, for example. (abbreviated) is used. In such an ADF, multiple originals with 81 layers can be read in one page.
A configuration is required to separate each sheet. With such a configuration, for example, a suction fan is used to create negative pressure, and the original is attracted to a suction surface having suction holes formed in a predetermined manner, thereby separating the original into individual sheets. The configuration is known.

FIG. 4 is a front view of such a suction surface 1.

A large number of suction holes 2 are formed on the suction surface 1 . Further, the documents 3 to be attracted to the attraction surface 1 are aligned, for example, right aligned with respect to FIG.

In FIG. 5, the symbols 85 and A4 indicate the sizes of B5 and A4 paper, respectively, in Japanese Industrial Style @ (JIS'). Therefore, 85 size paper is 35 in Figure 5.
If the A4 size paper is absorbed within the range of
It is absorbed within the range of .

Problems to be Solved by the Invention In the conventional technology using the suction surface 1 having the above-mentioned configuration, when 85 size paper is stacked on top of A4 size paper, the suction surface 1 cannot be used for 85 size paper. When I tried to suction this 85 size document 3, suction surface 1
There is a problem in that the suction holes 24, which are formed in an area that exceeds the size of 85 size, end up suctioning even the A4 size original below the B5 size original that should be suctioned. There was a problem in that the separation of each document sheet was not performed reliably.

In order to solve this problem, for example, as shown in FIG. 5, the suction hole 2a is not provided, that is, only in the area corresponding to the minimum size of the document 3 to be suctioned.
A configuration in which suction holes 2 are formed is also conceivable. With such a configuration, a B5 size document can be sucked onto the suction surface 1, but when attempting to suction an A4 size document, the suction hole 2a shown in FIG. 4 is not formed.
There was a problem that the suction of the manuscript was not performed reliably.

Therefore, an object of the present invention is to solve the problems mentioned above, and even when picking up sheet bodies of different sizes, it is possible to reliably collect these sheet bodies of different sizes one by one. An object of the present invention is to provide an improved sheet body suction device capable of suctioning a sheet body.

Means for Solving the Problems The present invention provides a suction apparatus including: a suction means having a suction surface in which suction holes are formed for suctioning a sheet body; and means for suctioning a sheet body to the suction surface. The suction surface of the means has a group of suction holes arranged in a manner corresponding to the smallest size of the sheet bodies to be suctioned, and suction holes selectively arranged corresponding to sheet bodies of different sizes. This is a sheet body adsorption device characterized in that:

Function According to the present invention, the suction surface in which the suction holes for adsorbing the sheet bodies are formed has an arrangement Wl that faces the size of the smallest sheet body among the sheet bodies to be suctioned. ! ! A group of suction holes,
Adsorption holes selectively arranged corresponding to sheet bodies of different sizes are respectively formed. - Therefore, when the sheet body is suctioned to the suction surface by the means for suctioning the sheet body to the suction surface, the smallest sheet among the sheet bodies is reliably suctioned by the suction hole group. A sheet body larger than the small size sheet body is reliably attracted by the suction hole group and the suction holes selectively arranged corresponding to sheet bodies having different thicknesses. .

On the other hand, a sheet body of the size 1 and a sheet body smaller than this sheet body are held together by 48 N. 7) Attempt to perform suction with the suction surface facing this small body. At this time, the small sheet body is reliably attracted by the suction hole group and the suction surfaces selectively arranged according to the size of the sheet body, as described above.

On the other hand, a relatively large sheet body on the side opposite to the suction surface with respect to this sheet body is only attracted by the selectively arranged suction holes, and therefore this sheet body is attracted to the suction surface 1 = suction surface 1. is prevented. Therefore, when sheet bodies of different sizes are stacked, it is possible to prevent a plurality of sheet bodies from being suctioned at the same time during the suction operation.

Embodiment i@1 Figure 1 is a perspective view of a suction head 10 which is a suction device according to an embodiment of the present invention, and Figure 2 is a simplified view of a dry duplicator 8!11 in which a suction head is used, for example. FIG. The configuration of this embodiment will be described with reference to FIG. 1 and FIG. fjS2. The suction head 10 includes a suction 7-an 12, a housing 13 having a negative pressure chamber communicated with the suction 7-an 12, and a suction member attached to the document 14, which is a sheet body, from the housing 13 via a seal member 15. 16. A suction hole as described later is formed in the bottom surface (lower surface in FIG. 1) of the suction member 16, and this suction hole communicates with the negative pressure chamber of the above-mentioned nozzle 13. Therefore, the suction head 10
By driving the fan 12, the negative pressure chamber in the housing song 13 is brought into negative pressure, so that the document 14 can be suctioned through the suction hole of the f-fireable member 16.

On the other hand, such a suction head 10 is provided in a dry type copying machine 11, for example, and is placed on a mounting table 18 which is moved up and down a shilling 17 and reciprocated in the direction of the arrow A1, and is used to suction original documents as described above. do.

On the downstream side of the document conveyance direction (arrow A2 direction in FIG. 2) with respect to the suction head 10, there is a paper edge detection means 19 for detecting the downstream end of the document in the conveyance direction, that is, the reading start end of the document. will be provided.

The paper edge detection means 19 is reciprocated in the direction of arrow A3. Further, as described above, the suction head 10 grips the document separated one by one and reciprocates in the direction of arrow A4, and the pressure plate 20, which reciprocates in the direction of arrow A5, reads the document. A gripping and conveying means 22 that reciprocates including the position of the surface 21 is arranged. Also, dry copying machine 11
A stacker 24 for stacking and storing, for example, copies of blue-tinted originals, is disposed in the 71 unung 23.

In the suction member 16 of the suction head 10 provided in the dry copying device 8!11, the suction holes as described above are arranged as shown in FIG. That is, the suction member 16
A suction hole group 26 as shown in FIG. 3 is arranged on the suction surface 25, which is the bottom surface facing the original W@14. Also the third
Symbols B5 and A4 in the figure represent paper sizes according to the Japanese Industrial Standards (JIS), as in the explanation of the prior art with reference to Figure t55 and Figure 6. That is, an 85-size original 14 is attracted to the range indicated by symbol B5 in FIG. 3, and an A4-sized original 14a is attracted to the range indicated by symbol A4. Further, the number and shape of suction hole groups 26 that are selectively provided on the suction surface 25 at locations other than the suction range of the 85-size original 14 are determined as follows.

Also refer to FIG. The document 14 is placed on the placing table 18.
When the document 14 is placed, the suction surface 2 of the suction member 16
Assume that, for example, a B5 size original 14 and an A4 size original 14a are stacked from the 5 side. At this time, the B5 size original 14 is reliably sucked by the suction hole group 26. On the other hand, the suction hole group 26 and the suction hole 27
When used together, when directly suctioning the A4 size original 14a, it is possible to reliably suction the document 14a. As described above, when the B5 size original 14 is suctioned in the range of symbol B5 in the tJS3 diagram, the A4 size original 14a on the opposite side of the suction surface 25 with respect to the B5 size original 14 is suctioned by the suction hole 27. Only. The number and shape of the suction holes 27 are such that the A4 size document 14a cannot be suctioned to the suction surface 25 by the suction holes 27 alone, and by using the suction hole group 26 and the suction holes 27 in combination. A4
The mode is selected so that the size original 14a can be reliably attracted to the attraction surface 25.

Therefore, by using the suction pad 10 having the suction surface 25 with such a configuration, B5 size g, 1n
14g and A4 size originals can be reliably attracted to the suction surface 25, and as mentioned above, B5 size originals, A4 size originals, and 8! Even if there are scraps, each piece can be reliably picked up one by one. Therefore, the edge portion 2 of the suction head 10
The gripping and conveying means 22, which fits into the originals 8 and 29, grips the original 14 or the original 14a, and conveys it in the direction of arrow A2 shown in FIG. 2 can reliably convey a single original. Therefore, in a dry type copying machine 11 or the like in which such a suction pad 10 is used, so-called copying errors can be reduced as much as possible.

Furthermore, by using such a configuration, the suction surface 25
It is possible to prevent a plurality of originals from being attracted to the original 14.14a, and a structure is provided to remove two or more originals when they are attracted to the side opposite to the suction surface 25 regarding the original 14.14a. 6 The present invention is not only applicable to the dry type copying machine 11 as described above (for example, a 7-axis copying machine, etc.) is capable of copying a single sheet-like original or printing paper, etc. It can be widely implemented in connection with a wide variety of devices that require separation between documents 14, 14.
Although the negative pressure by the suction nail 7 un 12 was used to attract the material FF 114, 14a, the structure for adsorbing the original FF 114, 14a is not limited to the structure using such negative pressure.

Effects According to the present invention as described above, the suction surface of the suction means for suctioning a sheet has a size corresponding to the smallest size of the sheet to be suctioned. A suction hole group of one type and suction holes selectively arranged in correspondence with sheet bodies of different sizes are respectively formed.

Individual types of sheet bodies of different sizes are reliably attracted to each other by using the suction hole group together with suction holes arranged corresponding to the size of each sheet body.

On the other hand, the size of the laminated sheet bodies becomes thicker as the distance from the suction surface increases (in this case, the sheet body closest to the suction surface has a size that corresponds to the size of the suction hole group and this sheet body). On the other hand, a sheet body that is larger than the sheet body on the side opposite to the suction surface with respect to this sheet body is sucked only by the selectively arranged suction holes. The holes are selectively formed so that the sheet cannot be picked up by such suction, so even in a stacked state of sheets, only the sheet closest to the suction surface can be picked up. It seems to be adsorbed to.

[Brief explanation of drawings]

Fig. fIS1 is a perspective view of a suction head 10 according to an embodiment of the present invention, and Fig. f52 is a dry copying machine 11 equipped with the suction head 10.
3 is a simplified cross-sectional view of the suction surface 2 of the suction member 16.
5, the front view of FIG. 4, and FIG. 5 are the suction surface 1 of the prior art.
FIG.

Claims (1)

[Scope of Claims] A suction device including a suction means having a suction surface in which suction holes are formed for suctioning a sheet body, and means for suctioning the sheet body to the suction surface, the suction surface of the suction means having: A group of suction holes arranged in a manner corresponding to the smallest size of the sheet bodies to be suctioned and suction holes selectively arranged corresponding to sheet bodies of different sizes are respectively formed. A suction device for sheet bodies.