JPH09240929A - Duplex copying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a duplex copying machine capable of facilitating maintenance work of replacement in simple constitution and certainly storing and feeding various sheets as well as positioning simultaneously with installation. SOLUTION: This device is constituted with an intermediate tray 2 to store one side copied sheets, a feeding roller 17 capable of rotating in a first direction to feed the copied sheets to the intermediate tray 2 and in a second direction to feed them from the intermediate tray 2 and an elastic member constituting body furnished with an elastic piece 19 provided to position on the inside of the intermediate tray 2 to follow when its head end makes contact with this feeding roller 17a and the feeding roller 17 rotates in the first direction and to position on an outside of the intermediate tray 2 at the time when it rotates in the second direction. Hereby, the elastic member constituting body is arranged free to connect and disconnect against the intermediate tray 2, an elastic member constituting body installation part of the intermediate tray 2 is projected from edges of the sheets to store, and the elastic member constituting body is devised not to make contact with the sheets.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided copying apparatus for copying on both sides of a copy sheet (hereinafter referred to as a sheet), and in particular, an elastic member structure for assisting storage and delivery of the sheet to an intermediate tray. The present invention relates to the configuration of the body.

[0002]

2. Description of the Related Art In recent years, many copying machines have been provided which are capable of automatically copying on both sides of paper.

An example of the above-mentioned conventional double-sided copying machine will be described below with reference to the drawings. FIG. 3 shows a cross section of a conventional double-sided copying machine disclosed in Japanese Patent Application Laid-Open No. 63-154541 published by the present applicant.

In FIG. 3, 1 is a copying machine main body, 2 is an intermediate tray provided below the copying machine, 3 and 4 and 5 are paper feeding devices for feeding paper from a cassette, 6 is a registration roller, 7 is a transfer section, and 8 is a transfer unit. Is a transport unit, 9 is a fixing device, 10 is a paper ejection tray,
Reference numeral 11 is a first switching claw for switching the traveling direction of the paper to the discharge tray 10 or the intermediate tray 2, and 12 is a conveyor belt supported by a drive pulley 13 and a driven pulley 14. 1
Reference numeral 5 is a tension pulley, and the conveyor belt is capable of normal rotation and reverse rotation.

Reference numeral 16 is a second switching claw, and 17 is a paper feed roller, which is capable of normal rotation and reverse rotation. Reference numeral 18 is a separation roller, and 19 is an elastic member described later.

Reference numeral 20 is a paper feed cassette arranged in the intermediate tray 2, 21 is a push-up plate for pushing up the front end of the stored paper, 22 is a stopper for stopping the front end of the stored paper, and 23 is a second. It is a registration roller of.

The elastic member 19 is, as shown in FIGS. 4 and 5,
It is made of an elastic piece fixed to the wall surface 2a of the intermediate tray 2 by a bracket 24, and its tip end portion 19a abuts the paper feed roller 17, and when the paper feed roller 17 rotates clockwise as shown in FIG. The tip portion 19a follows and is positioned inside the intermediate tray, and when rotating in the counterclockwise direction as shown in FIG. 4B, the tip portion 19a is positioned outside the intermediate tray.

The double-sided copying will be described below. After the fed paper is imaged on one side, it is sent to the conveyor belt 12 by switching the first switching claw 11 and passes under the second switching claw 16. After passing, the paper feed roller 17 and the separation roller 18 rotate in the clockwise direction and are trapped in the intermediate tray 2. Here, since the separation roller 18 is provided outside the wall surface 2a of the intermediate tray 2, the conveying force by the paper feed roller 17 and the separation roller 18 is up to the contact point of these two rollers, and the position is outside the wall surface 2a. is there.

Then, as shown in FIG. 4A, the sheet of paper enters between the paper feed roller 17 and the tip portion 19a of the elastic member 19 abutting against the paper feed roller 17, and is pushed by the elastic force of the elastic member 19 to the paper feed roller 17. It is applied and conveyed. At this time, the front end portion 19a of the elastic member 19 is located inside the wall surface 2a of the intermediate tray 2, and the sheet is reliably fed into the intermediate tray 2 up to the rear end, and the copied surface faces upward. .

When the sheet is fed from the intermediate tray 2, the sheet is pressed against the sheet feed roller 17 by the push-up plate 21 as shown in FIG. At the same time, the paper feed roller 17 rotates counterclockwise, and the separation roller 18 also rotates counterclockwise in the direction in which the paper fed out by the paper feed roller 17 is blocked. By this operation, only one sheet is always separated and fed. At this time, the elastic member 19 moves to the paper feed roller 1
By the rotation of 7, the front end portion 19a is located outside the wall surface 2a of the intermediate tray 2 and does not hinder the progress of the sheet at all. The second switching claw 16 is also moved to a position that does not prevent the sheet from advancing to the second registration roller 23. After that, the copy process is performed on the back side of the sheet through the same process as the normal copy operation, and then the sheet is ejected to the sheet ejection tray 10.

[0011]

However, in the above-mentioned conventional structure, the elastic piece of the elastic member is bent so as to be positioned inside or outside the wall surface of the intermediate tray in accordance with the forward rotation and the reverse rotation of the sheet feeding roller, and therefore the breakage occurs. It was necessary to replace it because the tip of the elastic piece wears due to contact with the paper feed roller, but it is clamped on the wall of the tip of the intermediate tray with a bracket and fixed with screws, etc. The work was difficult.

Further, since the elastic piece is sandwiched by the brackets on the wall surface at the tip of the intermediate tray, there is a problem that its positioning becomes very difficult due to the contact with the sheet feeding roller.

The present invention solves the above-mentioned problems of the prior art. The maintenance work of replacement is easy with a simple structure, positioning can be performed at the same time as mounting, and various sheets can be reliably stored and fed in the intermediate tray. An object is to provide a copying machine.

[0014]

In order to solve this problem, a double-sided copying apparatus according to the present invention comprises an intermediate tray for storing single-side copied sheets and a first direction for feeding the copied sheets to the intermediate tray. And the second one sent out from the intermediate tray
The paper feed roller rotatable in the direction of, and the leading end of the paper feed roller comes into contact with the paper feed roller, and when the paper feed roller rotates in the first direction, the paper feed roller follows the inner position of the intermediate tray, And an elastic member constituting body provided with an elastic piece provided so as to be located outside the intermediate tray when rotating in the direction of, and the elastic member constituting body is detachably arranged on the intermediate tray. Further, the elastic member constituting body attachment portion of the intermediate tray is made to project from the edge of the sheet to be stored so that the elastic member constituting body does not come into contact with the sheet.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is an intermediate tray for storing single-sided copied sheets, a first direction for feeding the copied sheets to the intermediate tray, and from the intermediate tray. When the paper feed roller rotatable in the second direction for delivery and its leading end abut on the paper feed roller and the paper feed roller rotates in the first direction, they follow and are positioned inside the intermediate tray. , An elastic member constituting body provided with an elastic piece provided so as to be located outside the intermediate tray when rotating in the second direction, and the elastic member constituting body is attachable to and detachable from the intermediate tray. It is arranged in
It is only necessary to attach / detach the elastic member structure provided with the elastic pieces to / from the intermediate tray, which has the effect of making replacement work extremely easy.

According to a second aspect of the present invention, the elastic member constituting body mounting portion of the intermediate tray is projected from the edge of the paper for storage so that the elastic member constituting body does not come into contact with the paper. Since the elastic member structure attachment portion of the intermediate tray is made to project from the edge of the paper to be stored so that the elastic member structure does not come into contact with the paper, the paper does not come into contact during the paper feeding operation. It has the effect of being sent without any hindrance to its progress.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged sectional view of an essential part showing an embodiment of the present invention, and FIG. 2 is a perspective view thereof. The same components as those in the conventional example are designated by the same reference numerals. The configuration of the double-sided copying machine is the same as in FIG.

In both figures, the elastic member 1 consisting of elastic pieces
Numeral 9 has an accurate projection length and is adhered to the support metal fitting 25 with a double-sided tape or an adhesive to integrally form an elastic member structure. Reference numeral 26 denotes a spring piece integrally formed at both ends of the support fitting 25, and the elastic member constituting body is formed as a separate piece.

27 is a hole formed in the elastic member structure,
The protrusion 28 formed on the wall surface at the tip of the intermediate tray 2 is fitted so that the elastic member structure is positioned with respect to the intermediate tray 2. Therefore, if the hole 27 is fitted into the protrusion 28 while the spring piece 26 of the elastic member constituting body is fitted into the wall surface of the tip of the intermediate tray 2, it is positioned and mounted. When the elastic member constituting body is to be detached, it can be easily removed by reversing the above.

When the elastic member structure is mounted on the wall surface of the tip of the intermediate tray 2 in this way, if the inner side surface is made smooth so that there is no unevenness, even if the edge of the paper to be fed comes into contact, it will be caught. Without being fed, it will not be interrupted.

For further safety, as shown in FIG. 2, the wall of the tip of the intermediate tray 2 is projected to the outside of the edge of the sheet containing the elastic member component mounting portion 29, so that the elastic member component forms the sheet. Be careful not to touch the tip edge of. With this configuration, the paper feeding is not hindered at all, the elastic member structure can be attached and detached very easily, and the maintenance work can be performed even when the paper is stored.

Although the holes 27 are formed in the elastic member structure in the mounting structure of the elastic member structure so as to be fitted into the protrusions 28 formed on the wall surface at the tip of the intermediate tray 2, Even if a protrusion is formed and a hole is formed in the wall surface at the tip of the intermediate tray 2 to fit them, there is no problem in fitting.

[0023]

As described in detail above, according to the present invention, an intermediate tray for storing sheets of one-sided copy, a first direction for feeding the copied sheets to the intermediate tray, and a second direction for feeding the sheets from the intermediate tray When the paper feed roller is rotatable in the first direction and its leading end is in contact with the paper feed roller and the paper feed roller rotates in the first direction, the paper feed roller is positioned inside the intermediate tray and follows the second tray. And an elastic member constituting body provided with an elastic piece provided so as to be located on the outer side of the intermediate tray when the elastic member constituting body is detachably attached to the intermediate tray. Since it is only necessary to attach / detach the elastic member structure provided with the elastic pieces to / from the intermediate tray, the maintenance work for replacement is very easy.

Further, since the elastic member constituent attachment portion of the intermediate tray is projected from the edge of the paper to be stored so that the elastic member constituent does not contact the paper, the paper advances even in the paper feeding operation. It is possible to obtain such an effect that the paper can be fed without any hindrance, and the maintenance work can be performed even when the paper is stored.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an embodiment of the present invention.

FIG. 3 is a sectional view of a conventional double-sided copying machine.

FIG. 4A is a sectional view of a main part for explaining a mounting structure and an operation of a conventional elastic member structure. FIG. 4B is a sectional view of a main part for explaining a mounting structure and an operation of a conventional elastic member structure.

FIG. 5 is a perspective view illustrating a mounting structure and an operation of a conventional elastic member structure.

[Explanation of Codes] 2 Intermediate Tray 17 Paper Feed Roller 18 Separation Roller 19 Elastic Piece 25 Supporting Metal Fitting 26 Spring Piece 27 Hole 28 Protrusion 29 Elastic Member Component Attachment Part

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location G03G 15/00 550 G03G 15/00 550

Claims (2)

[Claims] 1. An intermediate tray for storing single-sided copied paper, a paper feed roller rotatable in a first direction for feeding the copied paper into the intermediate tray, and a second direction for feeding the copied paper out of the intermediate tray. When the tip of the paper feed roller contacts the paper feed roller, the paper feed roller follows the inside of the intermediate tray when the paper feed roller rotates in the first direction, and the outside of the intermediate tray when the paper feed roller rotates in the second direction. And an elastic member constituting body provided with an elastic piece provided so as to be located in the intermediate tray, and the elastic member constituting body is detachably attached to the intermediate tray. 2. The elastic member constituting body mounting portion of the intermediate tray is projected from an edge of a sheet to be stored so that the elastic member constituting body does not contact the sheet. Double-sided copying machine.