JPH06321380A - Sheet material separation device - Google Patents

Abstract

PURPOSE:To separate multiple sheets of documents while maintaining a secure separatable range of conventional system by stopping the upper parts of multiple loaded documents just before a separation part by providing a document restricting member. CONSTITUTION:A restriction member 1 rotatable in vertical direction relative to a document surface is provided on the upstream side from document separation parts 105c and 105d. The member is provided with two surfaces one of which 6 restricts multiple sheets and the other of which 7 passes several sheets, and a frictional means is provided on each surface. Also an exciting means 2 is provided at the upper part of the restricting surface 6. By this, the upper parts of the multiple sheets of documents are stopped by the restricting surface 6, and several sheets of documents 10 pass over the slanted surfaces 7 of the lower parts of them. When the number of documents is less, the restricting member 1 is raised, and the document 10 passes under it. In this case, the angle theta1 between the restricting surface 6 and a document stand 129 is set at 30 deg.<theta1<120 deg., and the angle theta2 between the document stand 102 and the slanted surfaces 7 is selected from 0 deg.<theta<theta1. Thus the documents can be separated easily because the number of documents exceeding a specified one is never fed to a frictional separation part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material separating device, and more particularly to a document separating mechanism in a reading device such as a facsimile.

[0002]

[Prior art]

(Prior Art 1) As shown in FIG. 8, when a large number of sheets are set, all the originals are separated at a time by a structure including a preliminary conveyance roller 5, a pressure contact arm 8, a friction means 3 and a separation roller 4. Enter the department.

(Prior Art 2) As shown in FIG. 6, in order to prevent the operator from pushing the document to the separating portion, the shutter is lowered when the document is set and the shutter is released at the moment when the start button is pressed. Opens and enters the separating part all at once.

(Prior Art 3) A double separation system having two separation units.

(Prior Art 4) As shown in FIG. 7, a fixed regulating member 15 is attached to the shaft of the fixed roller 14 upstream of the separating portion to prevent a large number of originals from entering the separating portion all at once. .

(Prior Art 5) As shown in FIG. 7, an urging means is provided on a rotatable regulating member 15 upstream of a separating portion to press it against a document feeding surface.

(Prior Art 6) A fixed regulating plate is provided upstream of the separating portion, and a certain number of originals pass without hitting, but when the number exceeds that number, the regulating plate hits and regulates.

[0008]

The above-mentioned conventional example has the following drawbacks.

(1) As shown in FIG. 8, when the carrying force of the preliminary carrying roller 5 is large, the leading edge of the loaded document may be stuck in the separating portion and the leading edge may be clogged, resulting in no feeding.

(2) As shown in FIG. 8, as in the case of (1) above, the leading edge of the stacked document is jammed in the separating portion, and at that time, the reverse roller 3 is pushed up in the direction of P, and the lower part of the stacked document is located. Several sheets cause double feeding.

(3) As shown in FIG. 7, a guide plate is provided in front of the separating section to regulate a large number of originals to be stacked. It becomes large, and the thin paper becomes loose, causing paper jams. Further, it prevents the originals other than the lowermost one from being returned to the upstream side when the reverse roller is rotated in the reverse direction. The same phenomenon is seen in the double separation method.

[0012]

According to an embodiment of the present invention, there is provided an apparatus having a document separating section for separating and extracting the originals one by one from the lowermost layer of a plurality of originals. Has a fulcrum on a guide portion on the upstream side of the above and on the upper side of the document feeding path, and has a document regulating member mounted rotatably in a direction perpendicular to the lower document surface. The upstream side surface of the restricting member has a restricting surface against which the leading ends of a plurality of stacked documents abut. An inclined surface that allows a small number of documents to enter is provided below the restriction surface of the restriction member. Means is provided for bringing the regulating member into contact with the lower document conveying surface to urge it. The urging means is attached to an upper portion of the regulating member and is applied in a direction in which the regulating member presses the lower document conveying surface. The urging means of the regulating member has a mechanism that does not apply a load when the regulating member is slightly raised in the initial stage.

By providing the regulating member, the upper portion of a large number of stacked originals is blocked in front of the separating portion, and only a small number of originals at the lower portion are passed through. Therefore, a certain number of originals or more can always be fed to the separating portion. Easy to separate

Further, in order to separate a small number of sheets or a thin original document so as to separate a large number of sheets, only the dead weight of the regulating member is applied when passing through the original passage slope below the regulating member. did.

[0015]

2 is a perspective view showing the outer appearance of a facsimile machine to which the present invention is applied, and FIG. 3 is a front sectional view thereof. The outline of the facsimile machine will be described below.

When the document s set on the document table 129 (102) is inserted up to the document detection sensor (DS) 114, the pre-transport roller 105b which moves up and down is lifted and starts to transport the document. At this time, the upper part of the document is pressed by the pressure contact arm 105a. The next conveyed document passes through the regulating member 1 and is rotated by the reverse rotation roller 105c and the separation roller 10.
It is separated by 5d and the bottom one is the pinch roller 10.
5e and the paper feed roller 105f, the leading edge of the document reaches the document leading edge detection sensor (DES) 115, and when it is detected, the document is temporarily stopped and the preliminary conveyance roller 105b is lowered. Then, the original is read by the contact sensor 107 until the trailing edge of the original passes through the sensor 115. At that time, the next original has reached the paper feed roller 105f. After the reading of the first original is completed, it is discharged onto the discharge tray 108 by the discharge rollers 105h. At that time, the next original is being read.
The same is repeated thereafter.

FIGS. 1 (a), 1 (b) and 1 (c) are drawings which best represent the present invention. In FIG.
Is a regulating member devised this time, and 2 is a biasing means thereof. As shown in FIGS. 1A and 1B, the reverse rotation roller 105c
The regulating member 1 is rotatably attached to the shaft of the and the urging means 2 is provided. Further, different friction means are provided on the surfaces 6 and 7 of FIG. 1C, and the angle θ formed between the document table 102 and the restriction surface 6 is set.
1 is selected from 30 ° <θ1 <120 °, and the original table 102
The angle θ2 formed by and the slope 7 is selected from 0 ° <θ2 <θ1,
The dimension A is a value determined by how many sheets the downstream separating section can reliably separate, and is selected from the range of 0 <A ≦ 5 mm.

Next, in the above-mentioned structure, as shown in FIG. 1A, the original 10 is set and the preliminary conveying roller 105 is set.
Although the original is fed to the separating section at b, the upper part of the large number of originals is fixed to the surface 6 by providing the regulating member 1 upstream of the separating section, and only a small number of the lower originals are rotated from the slope 7. Lift and pass freely the regulating member 1. In addition, when the number of originals is small, the mechanism is such that all of them are lifted from the slanted surface 7 to pass through a rotatable regulating member, and the originals are wedged by the friction means of the slanted surface 7 and separated. It has an easy structure.

[Second Embodiment] (Embodiment 2) FIG. 4 is different only in the position of the fulcrum from the above-mentioned embodiment, and in this case, the separating portion is not a reversing roller but any friction separating method. The feature is that it can respond.
The friction separation method causes double feeding when an attempt is made to separate more than a certain number of documents. If you want to separate more documents, the performance of the separation part (motor torque, friction means of the separation part, etc.) must be improved, so the cost will inevitably increase, but the regulating member devised this time is installed upstream of the friction separation part. It is possible to solve the problem of feeding a large number of sheets only by providing them.

(Embodiment 3) By changing the shapes of the restriction surface 6 and the decimal passage surface 7 as shown in FIG. 5, the effect of passing through the restriction member 1 can be changed as follows.

In the case of (a), if the regulation surface 6 is formed into an arcuate shape R ₁ , it is the same as in the first embodiment when a small number of sheets are passed, but when a large number of sheets are passed, the upper surface of the loaded document hits the spherical surface of radius R 1. ,
The regulation member is lifted while forming a wedge shape for a large number of documents.

In the case of (b), if the passing surface 7 is formed into an arcuate shape R ₂ , the originals that are restricted when passing a large number of sheets are the same as those in the first embodiment described above, but the passing surface of a small number of sheets has a radius R2. It has a curved surface, which increases friction.

In the case of (c), if the regulation surface 7 is stepped 6 ', it is similar to the first embodiment when a small number of sheets are passed, but when a large number of sheets are passed, the stacked originals are provided by the three-stage regulation surface 6'. The upper part is regulated in three stages from upstream.

(Embodiment 4) In the above-mentioned Embodiment 1, when there is no biasing means, the force exerted on the document by the regulating member when the document passes through the decimal number passing surface 7 is only due to the weight of the regulating member. Become.

[0025]

As described above, according to the present invention, the method of passing the regulating member is different when feeding a small number of originals and when feeding a large number of originals, and the friction separating portion always keeps a certain number of originals or more. Since it is not sent and can be easily separated, there is an effect that a large number of sheets can be separated by adding a restriction member to the separation device that can separate only a small number of sheets.

[Brief description of drawings]

1A is a cross-sectional view of a document separating apparatus according to an embodiment of the present invention, FIG. 1B is a perspective view thereof, and FIG. 1C is a side view of a regulating member.

FIG. 2 is an external perspective view of a facsimile which is an application example.

FIG. 3 is a front sectional view of FIG.

FIG. 4 is a cross-sectional view of another embodiment.

FIG. 5 is a side view of a restriction member according to another embodiment.

FIG. 6 is a sectional view of a conventional example.

FIG. 7 is a sectional view of a conventional example.

FIG. 8 is a sectional view of a problem to be solved by the invention.

[Explanation of symbols]

 1 Document Control Member 2 Energizing Spring 105c Reverse Roller 105d Separation Roller 105b Preliminary Conveying Roller 6 Document Control Surface 7 Decimal Sheet Passing Surface 105a Pressing Arm 102 Document Plate 10 Document

Claims (2)

[Claims] 1. A sheet material separating device having a sheet material separating means for separating and pulling out a sheet material one by one from the lowermost layer of a plurality of sheet materials, wherein a sheet surface is provided upstream of the sheet material separating means. A sheet material restricting member rotatably attached to the restricting member is provided, and a restricting surface that abuts the leading ends of a plurality of originals is formed on the upstream side surface of the restricting member, and a small number of originals enter below the restricting surface. A sheet material separating device, which is provided with an inclined surface that allows 2. The angle .theta.1 formed by the restriction surface of the restriction member and the lower original conveying surface is 30.degree. As shown in FIG.
Select from the range of <θ1 <120 °, and the angle θ2 formed by the inclined surface below the regulation surface and the lower document transport surface is 0 ° <θ2 <θ1.
2. The sheet material separating device according to claim 1, wherein the sheet material separating device is selected from the range.