JPH037585B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sheet stacking device in a double-sided copying device, which allows recording paper (sheets) after single-sided copying to be stacked correctly in an intermediate stacker.

[Background of the invention]

Generally, in a duplex copying machine, the recording paper that has been copied on one side in the copying section is stored in a stacker installed below the copying section, and then the recording paper is re-fed from the stacker to the copying section to make a double-sided copy. There are, but
This stacker needs to stack the recording sheets sent through the feeding means in a state where they can be easily re-fed. For this reason, conventionally, a recording paper leading edge regulating member and a width regulating member have been installed on the floor of the stacker, and the movement of the leading edge regulating member and width regulating member can be automatically adjusted according to the size of the recording paper. .

However, since the conventional leading edge regulating member does not have any locking means, it moves due to the impact of the recording paper, making it impossible to align the recording paper correctly.
This became an obstacle when refeeding paper.

[Purpose of the invention]

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a sheet stacking device in which a recording paper leading end regulating member provided on the floor of a stacker is prevented from moving due to the impact of the recording paper.

[Structure of the invention]

In a sheet stacking device provided with a movable leading edge regulating member for regulating the leading edge of recording paper and a movable width regulating member for guiding both sides of the recording paper from both sides, the leading edge regulating member and the width regulating member are provided. a drive source for driving each member; a first actuating means for actuating the tip regulating member from the driving source; and a second actuating means for actuating the width regulating member from the driving source.
a switching means for selectively connecting the first actuating means and the second actuating means to the drive source; and a switching means for selectively connecting the first actuating means and the second actuating means to the drive source, and the first actuating means when the operation of the tip regulating member is completed. and a locking means for locking the first actuating means, and the second actuating means and the drive source are connected when the locking means locks the first actuating means.

〔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, and 2 is a primary paper feeding means. , and a second sheet feeding section 2b provided in the middle of the path leading to the copying section 4. 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; and 7 is a paper discharge section for discharging the recording paper 3 after fixing. It is.

Reference numeral 8 denotes a paper discharge path 9 that connects the fixing section 6 and the paper discharge section 7.
The guide roller is partially exposed at the top.
The guide roller 8 is configured to be able to actively rotate in the paper ejection direction. Reference numeral 10 denotes a movable guide plate whose distal end is curved so as to cover the guide roller from the sheet discharging section 7 side. By operating a solenoid (not shown), a position P covering the guide roller 8 and a retracted position P' can be selected as shown in FIG.

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 toward the primary paper feeding means 2 side of the copying apparatus main body 1. A first unit 12a equipped with a conveyance path 13 for linear conveyance
and a second unit 12b equipped with a stacker 26.
It consists of. This second unit 12b is connected to the second unit 12a via a hinge portion 14, and can be opened as shown in the third figure. Numeral 15 is a spring member that supports the second unit 12b when it is opened, and 16 is a locking member that stops the second unit 12b on the pin 16' of the first unit 12a.

The transport path 13 includes an upper plate 131 constituting the upper surface of the double-sided unit 12, and a lower plate 133 whose base end is rotatably attached to the 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;
A pressure roller 135 that is pivotally supported is in pressure contact with the tip of a spring member 136 fixed to the spring member 136 .

Reference numeral 17 denotes a secondary sheet feeding means provided on the front side of the conveying section 13 in the conveying direction. A friction ring 19 (a friction belt may be used in some cases) fixed to the friction ring 1
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. It includes an auxiliary roller 21 that is spring-biased so as to come into pressure contact with it. The friction ring 19 constituting the secondary paper feeding means 17 is connected to the drive shaft 2b' of the second paper feeding section 2b of the primary paper feeding means 2 and rotates in the direction of arrow a. Gear ration A provided on one end of 18
and are connected via gear ration B provided on the other end side, and both gear rations A and B are connected to solenoid 2.
It is constructed so that it can rotate in forward and reverse directions (directions of arrows b and b') by switching by the actions of 3 and 24.

Reference numeral 25 indicates a leading end regulating member for the recording paper 3 provided on the floor plate of the stacker 26, and 27 and 27' indicate width regulating members. The end regulating member 25 has an L-shaped side surface as shown in FIGS. 5 and 6, and the end of the bottom surface 25a becomes an inclined surface 25b. A protrusion 25 fitted so as to be able to slide along the provided vertical groove 28
It is equipped with c. Reference numeral 29 denotes a first actuating means for moving the tip regulating member 25 in the front-rear direction along the longitudinal groove 28;
The rope 32 tied to c is stretched between pulleys 30 and 30' provided in the underfloor space corresponding to the front and rear ends of the vertical groove 28, and one end of the rope 32 is wound around the drive pulley 31. , the other end is a tension adjustment pulley 33
is wound around the driving pulley 31 in a direction opposite to the one end side, and the driving pulley 31 is rotated forward and reverse to wind the end of the rope, and by unwinding it, the rope can be moved in the front-back direction. ing.

Further, the width regulating members 27, 27' are formed by bending a plate material into an L shape as shown in FIG.
Projections 27b, 27 fitted on the lower surfaces of 7a, 27a' so as to be able to slide along horizontal grooves 34, 34' formed in the floor plate of the stacker 26 in a stepped manner in the width direction.
b', and fixing racks 27c, 27c' with teeth arranged on the inner edge side to the lower surfaces of the protrusions 27b, 27b',
The racks 27c, 27c' are meshed with a pinion 35 which is pivotally supported in the underfloor space of the stacker 26. 36 is the width regulating member 27, 2
7' in the width direction, and the second operating means 36 connects both ends of a rope 38 wound around a pulley 37 fixed coaxially with the pinion 35 to a tension adjusting pulley 39, 40 is wound around the drive pulley 41 in opposite directions, and the drive pulley 41 is rotated forward and reverse to rotate the pinion 3.
By rotating 5, the racks 27c, 27
It is configured so that it can be moved in the width direction via c'. 42 is a first actuation 29 for actuating the tip regulating member 25, and the width regulating members 27, 27'.
A common driving source for the second actuation 36 for actuating the
The drive source 42 is capable of forward and reverse rotation. 43 is a switching means, and the switching means 43 is shown in FIG.
As shown in FIG. 2, a gear 45 can be swung around a shaft 45' that is meshed with a gear 44 fixed to the output shaft of the drive source 42, and a drive gear 47 that meshes with the gear 45 is pivotally supported at its swinging end. It includes a first lever 46 and a second lever 52 which has a cam groove 48 into which the shaft 47' of the drive gear 47 fits, and which swings about a support shaft 51 under the action of a solenoid 49 and a spring member 50. It becomes. That is, the solenoid 49 is OFF.
In this state, the plunger 49' is in the seventh position.
When it protrudes as shown in the figure, the spring member 50
As a result of this action, the second lever 52 swings counterclockwise, and the drive gear 47 fitted into the cam groove 48 via the shaft 47' is fixed coaxially with the drive pulley 31 as shown in FIG. It separates from the gear 54 that meshed with the gear 53 and meshes with the gear 56 that meshes with the gear 55 fixed coaxially with the driving pulley 41.
When the solenoid 49 is turned ON and the plunger 49' is pulled as shown in FIG.
swings clockwise against the spring member 50, the drive gear 47 fitted into the cam groove 48 via the shaft 47' swings together with the first lever 46 as shown by the arrow, It meshes with a gear 54 that meshes with a gear 53 fixed coaxially with the drive pulley 31, and separates from a gear 56 that meshes with a gear 55 fixed coaxially with the drive pulley 41.

Reference numeral 57 denotes locking means for locking the gear 54 meshed with the gear 53 fixed coaxially with the drive pulley 31 when the gear 54 is not driven.
A piece 59 of a V-shaped lever 59 that can rotate around 8
A locking pawl that locks onto the teeth of the gear 54 is provided at the tip of a, and the other piece 59b is biased by a spring member 60 in a direction in which the locking pawl locks on the gear 54. The other piece 59b extends so as to come into contact with the second lever 52 when the second lever 52 is swung by the action of the solenoid 49 so as to engage the driving gear 47 which is switched to the gear 54 as shown in FIG. There is. That is, the locking means 57 is connected to the tip regulating member 2.
In order to move the drive gear 5, when the drive gear 47 is engaged with the gear 54 which is engaged with the gear 53 fixed coaxially with the drive pulley 31, the drive gear 47 is disengaged from the gear 54.
When the driving gear 47 separates from the gear 54 after the distal end regulating member 25 moves, the gear 54 is locked. This prevents the leading end regulating member 25 from moving due to the impact caused by the collision of the recording paper 3.

61 detects that the tip regulating member 25 has reached the most retracted position, and turns on the power source of the drive source 42.
It is a micro switch that turns OFF, and the bulge 25 on the side of the protrusion provided on the lower surface of the tip regulating member 25
It is provided with an actuator 61' that comes into contact with c'.

62 is a push-up plate that pushes up the recording paper 3 after a predetermined number of single-sided copies of the recording paper 3 are stored in the stacker 26 and before the friction wheel 19 rotates in the direction of arrow b; 63 is a friction ring; This is a re-feeding path for the recording paper 3 sent out by the friction of 19.

In the above embodiment, in the switching means 43, the solenoid 49 is in the OFF state as shown in FIG. There is. Therefore, when the size of the recording paper is specified by pressing the designation button when copying, the drive source 42 rotates in a predetermined direction, and the rotation is controlled by the gears 44, 45,
It is transmitted to the drive pulley 41 via 47, 56 and 55, and winds or unwinds one end or the other end of the rope 38. As a result, the pinion 35 rotates to the right or left, and the width regulating members 27, 27' are expanded and expanded to match the size of the recording paper via the racks 27c, 27c'.
to shrink. In this case, the width regulating member 2
It is preferable to define a reference position for the sizes 7 and 27', and to control from this reference position to the positions of each size using pulse signals. In this way, when the movement of the width regulating member is completed, the solenoid 49 is activated.
ON, the drive gear 47 is brought into mesh with the gear 54 which meshes with the gear 53 fixed coaxially with the drive pulley 31, and the rotation of the drive source 42 is controlled by the gears 44, 45, 4.
7, 54, and 53 to drive pulley 31, and winds or unwinds one end or the other end of rope 32. From this, the leading end regulating member 25 moves forward or backward according to the size of the recording paper.

After the above operations are completed, when the copy button is pressed, the image is copied onto recording paper fed from the primary paper feeding means 2 in the copying section 4 in synchronization with scanning of the original. and,
The recording paper 3 that has been copied on one side is fixed, passes through the movable guide plate 10, and passes through the transport path 13 to the secondary paper feeding means 1.
7 will be transported. As a result, the recording paper is sandwiched between the friction wheel 19 and the double-feed prevention roller 20, which can rotate freely when the friction wheel 19 is rotating in the direction of arrow b', and the stacker 26
contained within. The stored recording sheets are correctly aligned by the width regulating member and the leading end regulating member, which are moved to positions that match the size of the recording paper, as described above. In this case, since the gear 54 meshed with the gear 53 fixed coaxially with the driving pulley 31 is locked by the locking means 57 when the tip regulating member 25 is not driven, the tip regulating member 25 cannot be moved by the impact of the recording paper hitting it. There is no.

After a predetermined number of sheets of recording paper 3 after single-sided copying are stored in the stacker 26 in this way, the friction wheel 19 starts rotating in the direction of arrow b, and the push-up plate 62
moves upward to press the uppermost layer of the recording paper 3 against the friction wheel 19, so that the recording paper is sequentially fed out starting from the uppermost layer.

〔Effect of the invention〕

As explained above, the double-sided copying apparatus according to the present invention includes a movable leading edge regulating member for regulating the leading edge of the recording paper, and a movable width regulating member for guiding both sides of the recording paper from both sides. In the provided sheet stacking device, a driving source that drives the leading edge regulating member and the width regulating member, respectively, a first actuating means that drives the leading edge regulating member from the driving source, and a driving source that drives the width regulating member from the driving source. a switching means for selectively connecting the first actuating means and the second actuating means to the drive source; and a switching means for selectively connecting the first actuating means and the second actuating means to the drive source, and when the operation of the tip regulating member is completed. A locking means for locking the first actuating means, and a structure such that when the locking means locks the first actuating means, the second actuating means and the driving source are connected. As a result, the recording paper leading end abutting member provided on the floor of the stacker does not move due to the impact of the recording paper, and therefore the recording paper can always be correctly aligned in the stacker, making it easy to refeed. It has the excellent effect of making paper easier to handle.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is an overall sectional view, Fig. 2 is a sectional view showing the action of the movable guide plate, and Fig. 3 is a sectional view with the second unit of the double-sided unit opened. Fig. 4 is a perspective view showing the forward and reverse rotation mechanism of the friction ring of the secondary paper feeding means, and Fig. 5 shows the leading end regulating member and the width regulating member of the recording paper, and the second operation of operating them. FIG. 6 is a plan view, FIG. 6 is a perspective view showing the first operation of operating the tip regulating member, FIG. 7 is a diagram showing the action of the switching means, and FIG. 8 is a sectional view of the drive pulley. DESCRIPTION OF SYMBOLS 1... Copying apparatus main body, 3... Recording paper, 25... Leading edge regulating member, 26... Stacker, 47... Drive gear, 5
7. Locking means.

Claims (1)

[Claims] 1. In a sheet stacking device provided with a movable leading edge regulating member for regulating the leading edge of recording paper and a movable width regulating member for guiding both sides of the recording paper from both sides, the leading edge regulating member and the width regulating member are respectively provided. a drive source that drives each of the regulating members; a first actuating means that operates the tip regulating member from the drive source;
a switching means for selectively connecting the first actuating means and the second actuating means to the driving source; and a switching means for selectively connecting the first actuating means and the second actuating means to the driving source; locking means for locking the first actuating means when actuation of the member is completed; and when the locking means locks the first actuating means, the second actuating means and the drive source are connected. A sheet accumulating device characterized in that it is configured as follows.