JPS6212537A - Double-side copying device - Google Patents

Abstract

PURPOSE:To facilitate the cooperation of paper feed speed and provide a compact economical copying device by connecting through a power a primary paper feed means for supplying paper to a copying section to a secondary paper supply means for resupplying the recording paper having one side copied. CONSTITUTION:On the way of a path of a primary paper feed means 2 for feeding recording papers to a copying section is provided a second paper feed section 2b. On the other hand, in a secondary paper feed means 17 for refeeding the recording paper having one side copied from a stacker to the copying section are provided a friction wheel 19 for feeding the recording paper in and out of the stacker, a double feed preventing roller 20 and an auxiliary roller 21. The friction wheel 19 is rotated in the direction of arrow b with a gear ratio A interlocked with a drive shaft 2b' of the second paper feed section 2b to feed in the recording paper, and in the direction of arrow b' with a gear ratio B to feed out said paper. The rear ratios A, B free the primary paper feed means 2 by the action of respective clutches 26, 34. Thus, the paper feed speed of the primary paper feed means 2 and the secondary paper feed means 17 is easy to coordinate, copy quality can be uniformalized and a compact economical copying device can be provided.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention stores a recording paper with an original image copied on one side in a copying section in a stacker provided below the copying section, and then copies the recording paper from the stacker. The present invention relates to a double-sided copying device that is capable of copying both sides by refeeding paper to the copying section.

[Background of the invention]

A conventional double-sided copying apparatus has two drive sources: a drive source for a primary paper feeding means that feeds the recording paper to the copying section, and a wA power source for the secondary paper feeding means that refeeds the recording paper after single-sided copying from the stacker to the copying section. Since each device was installed independently, not only did the device become larger, but the cost also increased. Furthermore, there is a possibility that the paper feeding speed of the secondary paper feeding means and the paper feeding speed of the secondary paper feeding means may not match, resulting in a difference in copy quality between one side and the other side.

[Purpose of the invention]

In view of the above points, it is an object of the present invention to provide a small, low-cost double-sided copying device that can easily match the paper feeding speeds of the secondary paper feeding means and the secondary paper feeding means. .

[Structure of the invention]

In order to achieve the above object, the present invention includes a primary paper feeding means for feeding paper to a copying section and a secondary paper feeding means for refeeding recording paper after nine-sided copying from a stacker to the copying section. The structure is such that the next paper feeding means is connected to the next paper feeding means by power so that a common driving source can be used.

〔Example〕

Next, the present invention will be described based on embodiments shown in the accompanying drawings.

In the figure, 1 is the main body of the copying machine, 2 is the primary paper feeding means,
The next sheet feeding means 2 includes a first sheet picking section 2a that feeds recording sheets 3 stored in a cassette (not shown) one by one, and a copying section 4.
It consists of a second paper picking section 2b provided in the middle of the passage leading to.

5 is a conveyor belt for the recording paper 3 copied by the copying section 4; 6 is a fixing section for the recording paper 3 sent by the conveyor belt 5; 7
2 is a paper ejecting section that ejects the recording paper 3 after fixing.

A guide roller 8 is provided so as to be partially exposed on a paper discharge path 9 connecting the fixing section 6 and paper discharge section 7, and the tf guide roller 8 can actively rotate in the paper discharge direction. . IO is a movable guide plate whose tip is curved so as to cover the guide roller 8 from the paper discharge section 7 side, and the movable guide plate 10
The base end is pivotally supported on the frame of the paper discharge section 7 via a shaft 11, and a position P that covers the guide roller 8 and a retracted position P' can be selected by the operation of a solenoid (not shown). (See Figure 2 ■, ■).

Reference numeral 12 denotes a duplex unit attached to the lower surface of the copying apparatus main body 1, and the duplex unit 12 directs the recording paper 3 flowing down along the movable guide plate 10 in a straight line toward the primary paper feeding means 2 side of the copying apparatus main body 1. It consists of a first unit 12a equipped with a conveyance path 13 for conveying objects and a second unit 12b equipped with a stacker 48. This second unit 12b is coupled to the first unit 12a via a hinge portion 14,
It can be opened as shown in the third figure. 15 is a spring member that supports the opened second unit 12b, and 16 is a spring member that supports the second unit 12b with the pin 16' of the first unit 12a.
This is a locking member that locks into.

The conveyance path 13 includes an upper plate 131 constituting the knee of the double-sided unit 12, and a lower plate 133 whose base end is rotatably attached to the cough upper plate 131 via a shaft 132. Reference numeral 134 denotes a feed roller that is pivotally supported by the upper plate 131 so that a portion thereof is exposed in the conveyance path 13. The feed roller 134 has a spring member 136 whose base end is fixed to the lower plate 133, and the tip thereof A pivotally supported pressure roller 135 is in pressure contact.

Reference numeral 17 denotes a secondary sheet feeding means provided on the front side in the conveying direction of the conveying section 13, and the secondary sheet feeding means 17 is connected to the duplex unit 12.
Friction shaft (may be a friction belt) 19 fixed to the center of #18 inserted between the side frames of the second unit 12b.
A double feed prevention roller 20 is spring-biased so as to come into pressure contact with the outer surface of the friction ring 19, and a lever 20b is pivotally supported by the tip of a lever 20b loosely fitted to the shaft 20a of the double feed prevention roller 20.
The friction shaft 19 includes an auxiliary roller 21 biased by a spring so as to come into pressure contact with the lower surface of the friction shaft 19. The friction shaft 19 constituting the secondary paper feeding means 17 can be switched between forward and reverse directions by the action of a gear ration A provided at one end of the shaft 18 and a gear ration B provided at the other end. . That is, as shown in FIGS. 4 and 5, the gear ration A includes a gear 22 that rotates in the direction of arrow a in conjunction with the drive shaft 2b' of the second paper feeding section 2b of the secondary paper feeding means 2, and A gear 23 meshed with the gear 22, a gear 24 meshed with the gear 23, and a gear 27 provided coaxially with the gear 24 via a clutch 26 which is connected and disconnected by the action of a solenoid 25.
When the friction shaft 19 rotates integrally with the gear 24 due to the action of the clutch 26, the rotation passes through an intermediate gear 28, a gear 29 fixed to one end of the shaft 18, and rotates the friction shaft 19 in the direction indicated by the arrow. . When the solenoid 25 is in the ON state, that is, when the plunger 25' is pulled and the tip 30' of the lever 30 is engaged with the ratchet on the outer periphery of the clutch 26, the gear 27 is connected to the gear 24. While freeing the shaft 24', the solenoid 25
is in the OFF state, the gear 27 is connected to the shaft 24' of the gear 24.
It is designed to become one with the

As shown in FIGS. 4 and 6, the gear ration B includes a gear 31 that meshes with a gear 22' fixed to the other end of the shaft 22a of the gear 22 rotating in the direction of arrow a, and A gear 32 that meshes with the gear 32 and a gear 33 that meshes with the gear 32.

A gear 35 is provided coaxially with the gear 33 via a clutch 34 which is connected and disconnected by the action of a solenoid 38, and when the gear 35 rotates integrally with the gear 33 by the action of the clutch 34, the rotation is caused by the rotation of the intermediate gear 36. The friction ring 19 is rotated in the direction of arrow b' via a gear 37 fixed to the other end of the shaft 18.

When the solenoid 38 of the clutch 34 is turned ON and the plunger 38' is pulled to rotate the bifurcated lever 39 downward against a spring (not shown) as shown in FIG.
The tip of the lever 40 is lifted by the bifurcated lever 39,
The gear 35 is engaged with a ratchet on the outer periphery of the clutch 34.
is released from the shaft 33' of the gear 33. Also.

The clutch 34 is turned off at the third solenoid, and the bifurcated lever 39 is turned off at the sixth position by the action of a spring (not shown).
When rotated as shown in Figure 3, the lever 40 is released from the ratchet, and the gear 35 becomes integrated with the shaft 33' of the gear 33. In other words, the friction wheel 19 is rotated in the direction of the arrow by the gearing A, that is.

This is performed when the solenoid 25 is in the OFF state.

In addition, the rotation in the direction of arrow b' is caused by gearation B.
That is, this is performed when the solenoid 38 is in the OFF state. When rotating in the direction of arrow A, the solenoid 38 of gear ration B is in the ON state, freeing the gear 35, and when rotating in the direction of arrow b', the solenoid 25 of gear ration A is in the ON state, freeing the gear 27. I have to.

However, as mentioned above, the bifurcated lever 3 of gear ration B
9 rotates downward when the solenoid 38 is turned ON (when the state changes from the state shown in ■ to the state shown in FIG. The rotor 41 comes off the protrusion 42 provided on the outer periphery of the child 41, and the rotor 41, whose rotation has been restricted until then, starts rotating together with the shaft 32' of the gear 32.

Therefore, as shown in FIG. 6I, the rotating lever 44, which had been pressed down by the protruding member 43 provided to protrude from the outer periphery of the rotor 41, is rotated clockwise by the action of the spring member 50.
The shaft 44' is rotated in the same direction. A stacker 48 is attached to the shaft 44' of the rotating lever 44 as shown in the fourth figure.
A push-up plate 4 for the recording paper 3 provided at the entrance portion of the recording paper 3 flush with the bottom surface thereof.
9 is fixed, the push-up plate 49 moves upward and presses the recording paper 3 against the friction ring 19. The rotor 41 rotates through a certain angle, and a protrusion 42' provided at approximately the same position as the protrusion 42 engages with a hook at the end of the upper lever 39b of the bifurcated lever 39, and is stopped.

Further, when the bifurcated lever 39 rotates upward due to the action of the spring when the solenoid 38 is OFF, the upper lever 39
9b is removed from the projection 42' of the rotor 41, the first rotor 41 rotates together with the gear 32 again, and the projection member 4
3, as shown in FIG.
The push-up plate 49 is pushed up at the same time as the push-up plate 49 is pushed down against the force.

Therefore, when the recording paper 3 is being conveyed in the conveyance path 13 by the feed roller 134 and the roller 135 that is in pressure contact with the recording paper 3, the friction ring 19 is operated by the action of the gear racing B (the solenoid 38 is in the OFF state). Since the recording paper 3 is rotating in the direction of the arrow b' due to the friction wheel 1
9, the paper is conveyed along a guide plate 47 provided to cover from the top surface to the front surface as shown in FIG. In this case, the double feed prevention roller 20 which is in pressure contact with the friction ring 19 is free to rotate. Also.

Since the auxiliary roller 21 is in pressure contact with the lower surface of the friction ring 19, the recording paper 3 is reliably fed to the position where its leading edge abuts against an abutment member 49 provided deep inside the stacker 48. The position of this abutting member 49 can be automatically adjusted according to the size of the recording paper 3.

As shown in FIG.
8 is turned on, and the push-up plate 49 is pushed up as described above.
The uppermost layer of the recording paper 3 on the upper surface is pressed onto the lower surface of the friction ring 19. Then, a little later than this, the solenoid 25 of the gear ration A is turned off and the Wl friction ring 19 starts rotating in the direction indicated by the arrow. In other words, the friction wheel 19 is configured to start after the recording paper 3 in the stuffer car 48 is pressed against the push-up plate 49. Therefore, the recording paper 3 is sent out by the friction, is separated one by one by the electrotransmission prevention roller 20, passes through the opening 51, joins the recording paper path of the primary paper feeding means 2, and is fed to the copying section 4 again. becomes.

Here, the process in which the recording paper 3 fed from the secondary paper feeding means 2 to the copying section 4 is re-fed by the secondary paper feeding means 17, and is ejected through the copying section 4 will be described in the eighth section. As shown in the figure, ■～■
It will be like this. In other words, ■ is a state in which the paper is fed with the back side up from the primary paper feeding means 2, ■ is a state in which one side is copied on the back side in the copying section, and ■ is a state in which the paper is reversed at the installation part of the movable guide plate 10, and the color is reversed. With the side facing up, ■ is sent through the conveying section 13 in the duplex unit 12 toward the primary sheet feeding means 2 side, and is reversed again by the action of the friction wheel 19 of the secondary sheet feeding means 17, with the back side facing up. The state in which it is placed upwards, and the state shown in ■ is the state stored in the stacker 48.

(2) is a state in which the friction wheel 19 is reversed and the paper is sent out again from within the stacker 48; (2) is a state in which the recording paper enters the primary paper feeding means 2 passage with the color side facing up; (2) is a state in which the recording paper is fed to the copying section 4; ■ is a state in which the paper is ejected after being copied on both sides.

〔Effect of the invention〕

As described above, the double-sided copying apparatus according to the present invention includes a primary paper feeding means for feeding paper to the copying section and a secondary paper feeding means for refeeding the recording paper after one-sided copying from the stacker to the copying section. , because the secondary paper feeding means is power-coupled with the primary paper feeding means, it is easy to match the paper feeding speeds of the secondary paper feeding means and the secondary paper feeding means, and the paper feeding speed of one side and the other side can be easily matched. In addition to making it possible to make the copying quality uniform, unlike conventional devices in which the drive sources for the secondary paper feeding means and the secondary paper feeding means are independent, the device can be made smaller and lower in cost. It has excellent effects.

[Brief explanation of drawings]

The figures show an embodiment of the invention, and FIG. 1 is an overall sectional view;
Figure 2 1. U is a sectional view showing the action of the movable guide plate, the third
The figure is a cross-sectional view of the duplex unit with the first unit opened, and FIG. 4 is a perspective view showing a forward and reverse rotation mechanism of the friction ring of the secondary sheet feeding means. FIG. 5 is a diagram showing gearation A, and FIG. 6 I. 7 is a diagram showing the action of the gear lacing B, FIGS. 7I to 7 are diagrams showing the action of the secondary sheet feeding means, and FIG. 1- Copying device main body 2--Primary paper feeding means 3-・
Recording IfE 4--Copying section 17-Secondary paper feeding means 19--Friction ring (friction belt) 48--Stacker patent Applicant Konishiroku Photo Industry Co., Ltd.! Figure 6 (I) Figure 7

Claims (2)

[Claims] (1) A primary paper feeding means that feeds paper to the copying section, and a secondary paper feeding means that refeeds the recording paper after single-sided copying from the stacker to the copying section, and the secondary paper feeding means is used as the primary paper feeding means. A screen copying device characterized in that it is power-coupled to a means. (2) The double-sided copying apparatus according to claim 1, wherein the secondary paper feeding means is linked to the primary paper feeding means via a forward/reverse switching means.