JPS59172357A - Sorter - Google Patents

Abstract

PURPOSE:To reduce a sorter for a copying machine or the like to a compact size by oscillating a plurality of trays at small pitch portions of a feed screw member and quickly oscillating a tray passing a sorting position at large pitch portions. CONSTITUTION:When a screw rod 8 is rotated forward by a motor 22, upper and lower nuts 9, 10 formed in small pitch are moved upward so that each tray 4 is moved upward through a lower spring 14. When a tongue piece 18 of an assigned tray 4''' is fitted in a spiral groove 17 of a guide nut 11, the tray is quickly moved in a large pitch to enlarge an interval with a low tray 41 at a position corresponding to a sorting position P, so that paper B is smoothly stored in the tray without jamming. In this arrangement, even if the interval between the trays is narrowed to reduce the sorter to a compact size, a paper jam can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application - The present invention relates to a sorter used in copying machines, printing machines, etc., for aligning the pages of sheets that have been copied, sheets that have been printed, etc.

BACKGROUND ART Conventionally, as shown in FIG. 1, for example, as shown in FIG. It is known that the paper C conveyed along the path is stored in a predetermined tray b.

In order to make the whole sorter small and compact, it is sufficient to shorten the distance t1 between adjacent trays b and b, but if this is done, the distance between adjacent trays will become narrower, and the paper will not fill the tray. The paper is not stored smoothly and paper jams occur at the paper entrance of the tray, resulting in poor reliability.

Therefore, in order to create a highly reliable sorter that is small and compact, does not cause paper jams, etc., it is known that the tray pitch (the distance between adjacent trays) is widened only when paper is inserted. However, this structure is complicated and expensive because it is necessary to swing each tray, and it also has problems such as making a large amount of noise when swinging the tray.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a small and compact device that is highly reliable, has a simple structure, is inexpensive, and does not generate large noise.

Structure of the invention The upper and lower nut members are moved by the small-pitch feed screw portion of the feed screw body, and the plurality of trays are oscillated.
The large-pitch feed screw portion of the feed screw body causes the tray passing the sorting position to swing faster than other trays, thereby widening the gap between the pair of trays facing the sorting position.

Example The present invention will be described in detail below with reference to FIG. 2 and subsequent figures.

The base ends of a plurality of trays 4 are pivotally connected to the side wall 1 of the frame body A via brackets 2 and bins 3 so as to be able to swing up and down, and the swinging end of each tray 4 has a paper stopper 4a and a folding plate. The bent portion 4b abuts the upper surface 4c of the tray 4, and the distance between adjacent trays 4 is shortened, making the whole tray compact.

A pair of conveyance rolls 5, 5 that are in pressure contact with each other are provided on the sides of the swinging end of the tray 4, the nip portion P of which serves as a sorting position (paper feed position), and the paper β is moved along paper guides 6, 6. It is transported to a pair of transport rolls 5.

That is, each tray 4 can swing freely around the bin 3 to a position facing the sorting position P.

A pair of holes 7, 7 are formed at positions on both sides of each tray 4 perpendicular to the paper feed direction, and a pair of threaded rods 8, 8 pass through each tray 4 through the pair of holes 7, 7. An upper nut 9 and a lower nut 10 are screwed into the upper and lower parts of each threaded rod 8, respectively, and a guide nut 11 is connected to a bin 12 at a position facing the sorting position P.
It is firmly fixed.

An upper spring 13 is provided between the upper nut 9 and the uppermost tray 4', and a lower spring 14 is provided between the lower nut 9 and the lowermost tray 4'.
The bent portion 4b is bent by the spring force of the upper spring 13 and the lower spring 14.
The swing bias is maintained such that the upper surface 4c and the upper surface 4c are in contact with each other.

The pair of upper nuts 9 and lower nuts 10 are the connecting plate 1
5. They are connected by screws 16 so that they cannot rotate, and the guide nut 11 is formed with a spiral groove 17, and the tray 4 has a hole 7 fitted in the groove 17. - The fitting tongue piece 18 is integrally formed.

The pair of threaded rods g are connected to rotate in the same direction at the same speed, and one threaded rod 8 is connected to the pulley 1.
9. It is connected to the motor 22 via a belt 2o and a pulley 21.

When the motor 22 is driven to rotate in the normal direction and the screw rod 8 is rotated in the normal direction, the upper and lower nuts 9 and 10 move upward, pushing up each tray 4 via the lower spring 14, and each tray 4 pushes up the bin 3. It swings upwards as the center.

Then, the tongue piece 18 of the predetermined tray l' is attached to the guide nut 1.
When the guide nut 11 is fitted into the spiral groove 17 of
Due to the rotation of the groove 17 and the feeding action of the tongue piece 18,
That tray 4 is moved faster than the other trays 4, and the distance between that tray l and the lower tray r becomes wider at the position facing the sorting position P, and the lower tray r
Paper B will not jam (it will be smoothly fed and stored).

Oh. The pitch of the spiral groove 17 is larger than the pitch of the threaded rod 8, and the guide nut 11
Tray 4 passing through sorting position P by
The trays 4 move faster than the other trays 4, and the distance between the pair of trays 4 and 40 facing the sorting position P is large.

Therefore, even if the space between the trays 4 is narrowed to make it compact and compact, paper jams and the like will not occur and reliability can be improved.

Further, when the motor 22 is driven in the reverse direction and the threaded rod 8 is rotated in the reverse direction, the upper and lower nuts 9 and 10 move downward, and each tray 4 swings downward in the same manner as described above.

In this way, there are
Small pitch screw rod 8 (in other words, small pitch feed screw part)
A feed screw body provided with a feed screw body is provided passing through each tray 4, and each tray 4 has a tongue piece 1 that engages with the feed screw portion of the large pitch 4.
8 is provided, upper and lower nut members (upper and lower nuts) 9 and 10 are screwed to the small-pitch feed screw portion, and a sorting position P is provided opposite the guide nut 1'r. Therefore, it has a simple structure, is inexpensive, and does not generate a lot of noise.

Effects of the Invention According to the sorter according to the present invention, even if the interval between each tray is narrowed to make it small and compact, there is no paper jam and reliability can be improved, and the structure is simple, inexpensive, and generates a lot of noise. That's it~ゝ0

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional example, FIG. 2 is a front view showing an embodiment of the present invention, FIG. 3 is a plan view, and FIG. 4 is a perspective view of a guide nut. 4 is a tray, 8 is a screw rod, 9 and 10 are upper and lower nuts, 7.11 is a guide nut, 7 is a spiral groove, 18 is a tongue piece, P is a sorting position 0 Applicant Fuji Xerox Co., Ltd. Agent Patent attorney Masaaki Yonehara Patent Attorney Tadashi Hamamoto

Claims (1)

[Claims] A plurality of trays 4 are swingably supported with respect to the sorting position P while maintaining predetermined intervals, and a feed screw body having small pitch feed screw portions above and below a large pitch feed screw portion is attached to the plurality of trays. A large-pitch feed screw portion that is rotatable through the tray 4 is provided so as to face the sorting position P, and upper and lower nut members are rotated on the upper and lower small-pitch feed screw portions of the feed screw body, respectively. The sorter is characterized in that each tray 4 is provided with a tongue piece 18 which is screwed together to prevent the trays from forming and which engages with a large pitch feed screw portion.