JPS5997939A - Device for manually inserting sheet - Google Patents

Abstract

PURPOSE:To make is possible to restrain the generation of wrinkles and slips while the capabilty of sheet transfer by a register roll is sustained, by providing a conveyor roll and an upper chuete slidingly contacted to the conveyer roll, before the register roll. CONSTITUTION:Conveying force of a sheet 4 is applied by nip force between one conveying roll 1 made of highly regilient materials such as, for exalmple, foamed urethane, and an upper chute 5 slidingly contacted to the roll 1, which are positioned before a resister roll 2. With this arrangement, the generation of wrinkles and slips may be restrained, and as well the device of a simple structure provided with the feeling of sheet insertion may be obtained while the capability of sheet transfer by the roll 2 is sustained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a manual paper feeding device for manually feeding paper in a copying machine or other office equipment.

A conventional paper manual feeding device is shown in Fig. 1, in which a paper C is inserted between a rubber transport roll a and a presser roll B, and a certain period of time elapses after the leading edge of the paper touches a sensor d. After that, the paper is fed by driving the transport roll a, and when the leading edge of the paper C is guided to the pair of register rolls e, the drive of the transport roll a is cut off.

In such a conventional configuration, the register roll e is the paper C.
When feeding the paper, the trailing edge of the paper is held down by the conveyance roll a and the presser roll b on the entrance side, causing wrinkles and slipping. Conventionally, a one-way latch g is provided on the axis f of the conveyance roll a. However, the rolling friction of the transport roll equipped with the one-way clutch g is extremely low, and the paper insertion sensation is poor, so the conventional manual paper feed device described above cannot There was a drawback that malfunctions were likely to occur due to paper being pushed too far. Further, in the conventional example, the conveyance roll a and the presser roll b must be provided separately for paper sizes 8 and 8, and there is also the problem that the number of rolls is large.

The present invention has been made in consideration of the above-mentioned problems, and provides a manual paper feeding device with a simple structure that maintains the paper conveyance property with registration rolls, suppresses the occurrence of wrinkles and slips, and has a feeling of paper insertion. This is what we are trying to provide.

Embodiments of the present invention will be described below with reference to FIGS. 3 and 4.

In the figure, reference numeral 1 denotes a conveyance roll provided in front of a pair of registration rails 2. This conveyance roll 1 is made of a highly elastic foamed material such as urethane foam, and is fixed to a shaft 1a. A driving member 3 such as a gear is fixed to one end of this shaft 1a. The conveyance roll 1 is in sliding contact with an upper chute 5 of a pair of upper and lower chutes constituting a conveyance path for the paper 4.

Therefore, the insertion resistance of the paper 4 is determined by the sliding friction force F1 between the paper 4 and the transport roll 1.

In the conventional example, paper insertion resistance is caused by transport roll a and presser roll 5.
It is given by the rolling friction force F2 between the conveyor roll a
The coefficient of friction of the one-way latch g provided on the axis f of is 0.01
Therefore, an increase in F2 could not be expected even if the pressing force of presser roll b was considerably increased. Since it is possible to control the density, material, etc. of the paper, it is possible to obtain an appropriate paper insertion resistance while eliminating the deflection of the shaft due to the high pressure seen in the conventional example.

Furthermore, the conveyance force F3 of the registration roll 2 is approximately 1.5 Kpf, whereas Fl is sufficiently small at approximately 80 ff, so that the conveyance force of the registration roll 2 is impaired by contact between the conveyance roll 1 and the upper chute 5. There is no.

Furthermore, in the conventional example, multiple conveyance rolls were required to match the width of the paper 4, but in the embodiment of the present invention, a single urethane roll can provide sufficient conveyance force over the width of paper ranging from paper size to large size. It was done. Another advantage is that a presser roll is not required, reducing the number of parts and simplifying the mechanism.

Since the paper manual feeding device according to the present invention is as described in detail above, the paper feeding device according to the present invention is a simple paper feeding device that maintains the paper transportability with the registration rolls 2, suppresses the occurrence of wrinkles and slips, and has a feeling of paper insertion. It can be configured as follows.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional example, and Fig. 2 is a u-n of Fig. 1.
3 is a front view showing an embodiment of the present invention, and FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. I is a transport roll, 2 is a resist roll, and 5 is an upper chute.・Applicant Fuji Xerox Co., Ltd. Agent Patent Attorney Masaaki Yonehara Patent Attorney Tadashi Hamamoto ■" h ■" Continued from page 1 0 Inventor Masashi Matsumoto 2274 Hongo, Ebina City Fuji Xerox Co., Ltd. Ebina Factory 0 shots Author: Ota-ya0 Inventor: Yuki Mizuno Inside Fuji Xerox Co., Ltd. Ebina Factory, 2274 Hongo, Ebina City0 Inventor: Eisaku Uchino Inside Fuji Xerox Co., Ltd. Ebina Factory, 2274 Hongo, Ebina City

Claims (1)

[Claims] A transport roll 1 made of a highly elastic material such as urethane foam is provided in front of the registration roll 2. An upper chute 5 is brought into sliding contact with this transport roll 1, and the paper transport force is applied to the transport roll 1. A manual paper feeding device characterized in that the nip force between the upper chute 5 is used.