JPH02231318A - Paper feeder - Google Patents

Abstract

PURPOSE:To prevent lateral falling down of a partitioning member so as to improve lateral position accuracy of paper in a paper feeder of a copying machine by providing a partitioning member engaging part at a frame positioned corresponding to the position of a portion of the partitioning member for controlling paper side edge position positioned above a paper feeding-out means. CONSTITUTION:A partitioning member 2 is supported at its base by a bottom plate 1 while at its upper part by a feeding-out means not shown. Namely, an fore end of an upper beam 2a is engaged with a groove 10a of a partitioning member engaging part 10 of a feeder frame so that it may not move laterally. It is thus possible to prevent falling down of partitioning member so as to position paper accurately in its lateral direction.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a paper feeding device used in a recording device such as a copying machine or a printer, and more specifically, the present invention relates to a paper feeding device used in a recording device such as a copying machine or a printer. A regulating screen member, a tray that has a hole through which the screen member passes and is raised and lowered by an elevating means, and a paper stack that is regulated by the screen member and is moved to a predetermined position by raising the tray of the paper stack stacked on the tray. The present invention relates to a paper feeding device having a feeding means for feeding out the topmost paper one by one.

[Conventional technology]

The conventional paper feeding device as described above is as shown in FIG. 2, in which the screen member is supported only by attachment to the bottom plate.

In FIG. 2, l is the bottom plate, 2 is a screen member for regulating the paper side edge position whose base is attached to the bottom plate l using attachment means such as screws or friction fixing pins, and 3 is a hole 3a through which the screen member 2 passes. The tray 4 is moved up and down as shown by double arrows by a known elevating means (not shown), and the position of the tray 4 is regulated by the screen member 2, and the paper P loaded on the tray 3 is moved up and down the tray 3 by the elevating means. a feed roller that is brought into contact by rising; 5;
8 is a feed belt wrapped around support rollers 6 and 7, 8 is a double feed prevention roller that is in contact with the feed belt 5, and 9 is a tensioner that adjusts the tension of the feed belt 5 and the contact pressure to the double feed prevention roller 8. It's a good job.

The attachment position of the screen member 2 to the bottom plate l by the attachment means can be changed depending on the size of the paper P loaded on the tray 3, and the hole 3a of the tray 3 has a hole with enough room for this. The feed roller 4 is rotated clockwise by a known drive means (not shown), and feeds the paper P in contact with it between the feed belt 5 and the double feed prevention roller 8 by frictional force. Feed belt 5 and double feed prevention roller 8
The feed belt 5 rotates in the direction of the arrow by rotating the support roller 6 or 7 clockwise by a known drive means (not shown), and applies a feeding action to the upper surface of the paper being fed, thereby increasing the weight. The feed prevention roller 8 is stationary or rotates in the opposite direction to the paper feed direction by a known drive means (not shown) to apply a feed prevention effect to the bottom surface of the paper, thereby preventing the occurrence of double feed and separating the paper into one sheet. Make sure to send out one sheet at a time.

In the paper feeding device as shown in FIG. 2, the screen member 2 is supported only by attachment to the bottom plate l of the base, so the upper part of the screen member 2 tends to tilt, and the paper fed out by the important feed roller 4 There was a problem in that the left and right positions of the parts were easily changed.

[Problem to be solved by the invention]

The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a paper feeding device equipped with a screen member that accurately regulates the left and right position of paper to be fed out.

[Means to solve the problem]

The present invention provides a bottom plate, a screen member for regulating the paper side edge position whose base is supported by the bottom plate, a tray having a hole through which the screen member passes and is raised and lowered by a lifting means, and a tray regulated by the screen member. In a paper feeding device having a feeding means for sending out one sheet at a time the uppermost paper that is stacked on top and reaches a predetermined position by raising the tray, a screen member is provided in the frame portion of the device 7 above the predetermined position. The paper feeding device is characterized in that it is provided with a screen member engaging portion that engages with the upper part of the paper feeder to support the screen member so that it does not fall in a direction perpendicular to the paper feeding direction. achieve.

[Effect]

In other words, in the paper feeding device of the present invention, the screen member is not only temporarily supported at its base, but also engages with the screen member engaging portion provided in the device 7 frame at the upper portion above the paper position where the paper is fed out by the feeding means. Since the upper part is supported so as not to tilt, the left and right position of the paper fed out by the feeding means is accurately regulated. In addition, the engagement between the screen member and the screen member engaging portion can be achieved by, for example, inserting a protruding end formed on the screen member into a groove formed in the screen member engaging portion. If a plurality of screen members are provided according to the position of the screen member that changes depending on the change, the position of the screen member can be easily changed even when the paper size is changed.

〔Example〕

The present invention will be explained below with reference to the embodiment shown in FIG.

In FIG. 1, the same reference numerals as in FIG. 2 indicate the same functional members or parts, and IO is a screen member engaging portion having a groove 10a into which the tip of the upper girder 2a of the screen member 2 is inserted. It is provided on the omitted device frame. In addition, in FIG. 1, the feed means consisting of the feed roller 4, the feed belt 5, the double feed prevention a-ra 8, etc. shown in FIG. Illustration is omitted.

In the paper feeding device shown in FIG.
The tip of the device frame is inserted into the groove 10 of the screen member engaging portion lO of the device frame.
Since the upper part is supported so as not to tilt to the left or right by being engaged with the upper part a, the lateral position of the paper sent out by the feeding means can be accurately regulated.

The present invention is not limited to those in which the feeding means uses a flexible roller or a flexible belt, or to those in which the screen member has a frame structure. In addition, if the screen member can change the left and right position steplessly by feeding screws, etc., the engagement with the screen member at the latching part of the screen member is also screwed in the same way, and the screwing position is changed parallel to the base. Just make it into something.

〔Effect of the invention〕

In the paper feeding device of the present invention, an excellent effect can be obtained in that the horizontal position of the paper fed out by the feeding means can be accurately regulated by the screen member.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing an example of the paper feeding device of the present invention, and FIG.
The figure is a schematic perspective view showing an example of a conventional paper feeding device. l... Bottom plate 2... Screen member 3... Tray 3a... Hole 4... Feeding roller 5... Feeding belt 6.7... Support roller 8...
・Double feed prevention roller 9...Tension 1 roller

Claims (2)

[Claims] (1) A bottom plate, a screen member whose base is supported by the bottom plate for regulating the paper side edge position, a tray that has a hole through which the screen member passes and is raised and lowered by an elevating means, and a tray that is regulated by the screen member. In a paper feeding device having a feeding means for feeding out one sheet at a time the topmost paper of a stack of paper stacks loaded on the tray that reaches a predetermined position by raising the tray, a screen is provided in a portion of the device frame above the predetermined position. A paper feeding device comprising a screen member engaging portion that engages with the upper part of the member to support the screen member so that it does not fall in a direction perpendicular to the paper feeding direction. (2) The first aspect of the present invention is that the engagement between the screen member and the screen member engaging portion is caused by a protruding end formed on the screen member entering a groove formed in the screen member engaging portion. Paper feeding device as described in section.