JPS6265860A - Drive roller support device - Google Patents

Abstract

PURPOSE:To obtain a simplified and lightweight structure by swingingly movably supporting a holder rotatably movably supporting at both ends thereof driven rollers and applying pressure to both ends of the holder by a spring member extending over both ends with the swing center interposed therebetween. CONSTITUTION:A paper ejector cover 14 is provided with drive rollers 1 mounted thereto through bearings 17 and having at one end a fixedly secured gear 18 through external power is transmitted. In the above structure, a pair of two driven rollers 9 to be brought in abutment against the drive rollers 1 are rotatably fitted into both ends of a holder 10. The holder 10 has a central slot 19 through which a pin 16 on the paper ejector cover 14 extends and is held against falling off by a grip ring 13. A plate spring 11 is fitted at both ends thereof to pins 2 provided at both ends of the upper surface of the holder 10, and it is urged by a spring bearing 15 on the paper ejector cover 14. This allows a pair of two driven rollers 9 to be pressed against the respective drive rollers 1 by equal force.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a driven roller support device, specifically, for example, a set for conveying paper by sandwiching it between a driving roller and a driven roller in a paper conveying section of a copying machine. This relates to a support device for a driven roller among the rollers.

[Conventional technology]

Conventionally, methods for supporting driven rollers can be broadly classified into the following two types.

The first method is to use a spring 3 to press both ends of the driven roller 2 that are in contact with the driving roller 1, as shown in FIG. Note that 4 is a bearing, and the drive roller 1 is rotated by a drive source (not shown).

The second method, as shown in FIG. 5, is that the driven roller 5 is independent and rotatably held by an arm 7 that is rotatable about a shaft 6, and is pressurized by a spring 8.

In recent years, compact and lightweight copying machines have been developed; however, since these types of copying machines lack internal space, conventional methods of supporting rollers often cannot be used.

In the first method described above, since the driven roller 2 is rotatably supported by a long through shaft, other parts cannot be placed in the middle, and the method may not be adopted due to the structure. In addition, since pressure is applied to both ends of a long roller, if the shaft is made thinner to reduce weight, there is a risk that the upper and lower rollers will not come into contact with each other in the center due to flexure, and there is a limit to how much weight can be reduced.

Furthermore, the above-mentioned second method can be achieved by making the arm 7 itself a leaf spring in terms of weight reduction. However, since this method requires a space equal to the length of the arm, it cannot be adopted if there is no space in the left-right direction in FIG.

1- As mentioned above, 1. It can be seen that the second method cannot be used depending on the constraint conditions.

[[]Object of the invention]

The present invention can solve conditions that cannot be met with conventional methods, such as when parts are inserted in the middle and a through shaft cannot be used.
The purpose of the present invention is to propose a new driven roller support device that is light, compact, and simple in structure in cases where there is not enough room on the left and right sides of the roller and the arm cannot fit.

[Step 3 for Solving Problem 67] I-In order to achieve the above objective, the driven roller support device according to the present invention supports rotatable rollers at both ends and includes one or more swingable holders. Each holder is characterized in that both the left and right sides of the holder are pressurized by a spring member extending from side to side with the swing support point in between.

〔Example〕 The present invention will be explained below based on the illustrated embodiments.

':tSI diagram is an embodiment according to the present invention, which is a paper discharge section of a copying machine. FIG. 2 is a sectional view, and FIG. 3 is a perspective view of the holder 10 of the driven roller 9 and the leaf spring 11.

A drive roller 1 is added to the paper discharge force /<-14 via a bearing 17, and a gear 1 is fixed to one end of the drive roller 1 to apply external power to the drive roller L. It's meant to be conveyed.

Holder 1 in which driven rollers 9 are rotatably fitted at both ends
0, the elongated hole 19 in the center is connected to the bin 16 on the paper ejection cover 14.
The grip ring 13 prevents it from being removed. Since the grip ring 13 is not pushed in, the holder 10 can move freely within the elongated hole 19.

The leaf spring 11 is fitted into the left and right bins 20 on the holder 10, and is pressurized by a spring receiver 15 on the paper discharge cover 14.

As shown in Fig. 2, the holder 10 has one side covered with the paper ejection cover 1.
4, and the other side is fixed with a grip ring 13 with a clearance of 0.1 to 0.2 mm, so the holder 10 can be driven upwardly with respect to the bin 16 and centered around the axis of the bin 16. Only rotation interlocking is possible.

In other words, since the holder 10 is slidable and swingable, the left and right driven rollers are pressed against the drive roller 1 with equal force by the pressure of the spring 11, so that driven rotation can be performed reliably.

In addition, 21 is a paper discharge actuator, and 22 is a sensor.

Further, as is clear from FIG. 2, the support device of the present invention is always compact when viewed in cross section because it fits within the width of the driven roller 9.

In other words, in one embodiment of the present invention, a rotatable roller is supported at both ends, and a holder having a long hole approximately in the center is inserted into the bottle of the mating member on the axis of the mating member's roller. One or more holders are arranged in parallel, and each holder is characterized in that both the left and right sides are pressurized by a single plate spring that extends left and right with a long hole in between.

In the embodiment of the present invention, the holder 10 has an elongated hole 19, but this may be U-shaped with one end open. The plate spring 11 may be placed in close proximity to the other parts to form the opening 11-.Furthermore, the leaf spring 11 may be a molded spring integrally molded with the paper discharge cover 14.

In addition, a long hole is formed on the paper ejection cover 14 side, and the holder 10
You can also plant a bottle that can fit this length.

〔Effect of the invention〕

As explained above, the supporting device for the driven roller according to the present invention has a simple structure and can reliably apply pressure, and furthermore, it is possible to keep l to the same extent as the diameter of the roller, so it takes up less space in small machines, etc. This is effective when there is not enough room.

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a sectional view of the embodiment, Fig. 3 is a perspective view of the embodiment, Fig. 4 is a front view of a conventional example, and Fig. 5 is another conventional example. FIG. 3 is a side view of an example. 1-1-1 driving roller, 9--1 driven roller, 10-
--- Holder, 11 --- One panel, 14 --- One paper ejection cover, 15 --- Spring holder, 16 --- Pin,
19---One long hole.

Claims (1)

[Claims] (1) A rotatable roller is supported at both ends, and one or more swingable holders are arranged, and each holder is applied with a spring member extending left and right with the swing support point in between. A driven roller support device characterized by being pressed.