JP2619187B2 - Stacker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacker for transporting and stacking pieces of paper that have been cut into a single leaf state so as to be sequentially inserted below the previously stacked pieces of paper.

[0002]

2. Description of the Related Art As a conventional stacker, for example, a paper receiver comprising a bottom plate and a side plate and a stopper which stands on the bottom plate and regulates the depth in the sheet feeding direction, and is inserted into the paper receiver on the upper surface of the bottom plate. A sheet piece conveying means for feeding the sheet pieces along the sheet piece, receiving the sheet pieces sent from a connected printing machine or printer, and lowering the sheet pieces by the sheet piece conveying means. There is a stacker which is inserted until the tip abuts on a stopper, and is sequentially stacked from below.

[0003] In the case of a stacker in which a piece of paper is inserted under the stacked piece of paper and stacked, a new piece of paper is inserted below the piece of paper in the stacked state. It is necessary to increase the conveying force of the sheet piece conveying means for conveying the sheet. In addition, if a piece of paper is long in the transport direction and it is wound in a roll, it may have a curl even after printing, and in such a case, it will be When the paper is inserted and the leading end abuts against the stopper, if the curl direction is upward, the paper piece may be pushed up and come off the stopper.

Therefore, in such a stacker, it is necessary to add a certain amount of weight to the upper surface of the paper pieces stacked on the bottom plate, so that, for example, the paper pieces are transported in a direction perpendicular to the transport direction of the paper pieces. A pressing member extending in the width direction of the paper is provided above the bottom plate with a paper pressing member configured to move up and down along the laminating direction of the paper pieces, and a weight is attached thereto, whereby the paper pieces stacked on the bottom plate are removed from the top side. Pressing to suppress lifting of paper pieces.

[0005]

However, in the case where the weight is attached to the paper holder as described above, when the paper pieces are sequentially stacked on the bottom plate and the number of sheets increases, the paper pieces stacked on the bottom plate are increased. Because the weight of the paper piece that has increased due to the increase in the number of sheets and the pressing force of the paper holder with the weight applied to
Depending on the type of the paper piece, it may not be possible to insert the next paper piece to be laminated below the paper piece.

That is, when a perforation 27a is formed in the paper width direction orthogonal to the conveying direction, for example, as in a paper piece 27 'as shown in FIG. 17, it is placed on the bottom plate 31 as shown in FIG. 19, the lower side of the paper piece 27 'is shown in FIG. Since the burr 27b generated when the perforation 27a is formed is formed as described above, if the burr 27b is formed on the lower surface as shown in the figure, the tip 27c of the paper piece 27 'is
A piece of paper 2 already stacked at the bottom on the bottom plate 31
When the burrs 27b of the 7 'are abutted, a resistance is generated. Even if a further insertion is made, the burrs 27b cannot be inserted into the burrs 27b.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and when the cut single leaf paper pieces are sequentially inserted under the previously laminated paper pieces to be laminated, the laminated sheets are stacked first. An object of the present invention is to ensure that sheets can be stacked reliably even when the number of sheets is large or when the sheets have perforations.

[0008]

According to the present invention, in order to achieve the above object, in a stacker as described above, a stack of paper sheets generated by pressing a stacked paper sheet from above and inserting a new paper sheet is provided. Paper press that suppresses the lifting of paper pieces and the lifting of paper pieces with the paper press
Part that directly applies to the load
Contact indirectly via a target or contact member, and the contact state
To transmit the load of the load member to the paper presser.
And the load applied to the paper holder is stacked
Pressing that is released when the stacking height of the paper pieces exceeds a predetermined height
And force release means . In the stacker, it is effective to provide a mechanism for adjusting the predetermined height in the pressing force releasing means.

[0009]

According to the stacker constructed in this manner, the load is applied to the sheet press by the load member until the stacking height of the sheet pieces reaches a predetermined height.
Since al the even sheet pieces stack height is curled when low is conveyed, there negative suppress floating of the sheet piece
Because paper pressing load was found given is pressed against, it can be reliably stacked suppressing floating.

Further, when the stacking height of the sheet pieces exceeds a predetermined height, the load applied to the sheet press is released, and only the own weight of the sheet press acts on the highest one of the stacked sheet pieces. When the stacking height exceeds a predetermined height, a force that strongly presses the lowermost sheet piece does not act on the lowermost sheet piece. Therefore, a sheet piece having a perforation in the sheet width direction orthogonal to the transport direction. Is inserted into the lower side of the lowermost piece of paper and stacked, no large resistance is generated at the time of insertion, so that it can be reliably inserted to a predetermined stacking position.

Further, if a mechanism for adjusting the predetermined height is provided in the pressing force canceling means, the stacking height of the sheet pieces for canceling the load applied to the sheet press can be changed arbitrarily. When the seeds are stacked, the height at which the addition of the optimum pressing force is released can be selected according to the type of paper, so that the reliability is further increased.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a side view showing a schematic configuration of a state in which a stacker according to an embodiment of the present invention is attached to a printer. However, the printer P on which the stacker S is mounted only shows a main part thereof.

First, the printer P will be described. A thermal head 11 is provided.
1 prints while pressing a roll paper 15, which is a continuous paper wound in a roll shape via a thermal transfer ribbon 13, against a platen 17. The roll paper 15 is wound in a roll shape at a position (not shown), is pulled out of the roll by rotation of the platen 17, is conveyed to the left in the drawing, and an image is recorded (printed) on the paper surface.

On the other hand, the thermal transfer ribbon 13 is
After the printing, the printing paper is separated from the roll paper 15 by the peeling plate 21 and wound on the winding bobbin 23. Then, the roll paper 15 on which the image has been transferred is
The sheet is cut into a predetermined length by 5 and is sent to a stacker S as a sheet piece (hereinafter simply referred to as a "sheet piece") 27.

The stacker S is, as shown in FIGS. 1 and 2, a rear side plate 29 which is erected in parallel and spaced apart from each other.
And the front side plate 30 (hereinafter, abbreviated as “side plate”,
0 is omitted in FIG. 1), a bottom plate 31 which is orthogonal to them, and which is arranged at a slight downward inclination in the paper sheet conveying direction as shown in FIG. The paper tray 35 is constituted by a stopper 33 which stands upright and regulates the depth.

The bottom plate 31 receives the cut piece of paper 27 therein. Further, the side plate 29 regulates the position of the rear end face of the paper pieces 27 stacked on the bottom plate 31 and
3 regulates the leading end position of the paper piece 27 on the bottom plate 31 in the feeding direction.

One side plate 29 has a height higher than the maximum stacking height of the paper pieces above the bottom plate 31, while the other side plate 30 is provided only below the bottom plate 31. The upper part is opened so that the paper pieces 27 stacked on the bottom plate 31 can be taken out to the near side in FIG. 1 (left side in FIG. 2).

The stacker S is inserted into the paper tray 35 into the bottom plate 3.
1 is provided with a transport mechanism (to be described later) for feeding the paper strip 27 along the upper surface of the paper strip 27. The tip of the paper strip 27 fed by the transport mechanism is brought into contact with the paper strip contact surface 33a of the stopper 33 to be aligned. 27 are sequentially stacked from below (hereinafter, also referred to as a stack).

The stopper 33 is a molded product made of resin or the like, and its paper piece contact surface 33a extends in a direction perpendicular to the upper surface of the bottom plate 31 and has an interval in the width direction as shown in FIGS. Are formed by each front edge of a plurality of rib-shaped portions formed in parallel.

The bottom plate 31 is formed of a ferromagnetic material such as an iron plate.
Groove 37 as shown in FIGS. 2 and 4 along the receiving Direction of paper 27 has been formed, the bottom surface of the stopper 33 is provided with a projection 39 which engages with the groove 37 (FIG. 3, FIG. 4
reference). Further, a magnet 43 having a pole piece 43a is fixed to a lower portion inside the stopper 33 as shown by a broken line in FIGS.

Another groove 200 is formed in the bottom plate 31 outside the side plate 30 in parallel with the groove 37.
Positioning member 201 of a stopper disposed on the lower surface side of 1
A pin 203 is screwed into the positioning member 201 from the upper surface side of the bottom plate 31 through the groove 200 so that the pins 202, 202 which are caulked in the groove 200 slide in the groove 200.
Is attached. By tightening the knob 203, the bottom plate 3 is attached to the positioning member 201 and the knob 203.
1 is sandwiched, and the positioning member 201 is fixed to the bottom plate 31.

The positioning member 201 extends to the inside of the side plate 30 through a slit (not shown) formed between the side plate 30 and the bottom plate 31, and is bent upward at its tip to fit into the groove 37. Hooks 201a are formed and project from the grooves 37 on the upper surface of the bottom plate 31 as shown in FIG.
Contact 9

The attraction force between the pole piece 43a of the magnet 43 and the bottom plate 31 in FIG. 3 is set so that the stopper 33 can slide back and forth along the groove 37 of the bottom plate 31 in the sheet conveyance direction. . Also, along one side edge of the groove 200, a scale indicating the length in the transport direction of the stackable paper pieces or the paper size is provided on the bottom plate 31.

Then, the knob 203 is loosened and moved along the groove 200 together with the positioning member 201, and the knob 203 is tightened by aligning the center of the knob 203 with the scale corresponding to the length of the stack of paper sheets. The hook 201a is fixed at a required position.

Thereafter, the stopper 33 is attracted to the bottom plate 31, and the projection 39 is moved in the paper sheet conveying direction with the projection 39 fitted in the groove 37. When the projection 39 is stopped at the position where the projection 39 contacts the hook 201a, the stopper 33 paper piece contact surface 33a
And the direction perpendicular thereto (hereinafter, also referred to as the “width direction”) are determined and fixed at that position. In this way, the depth of the paper receiver 35 can be adjusted steplessly.

The stopper 33 is provided with the lower end 33c of the stopper 33 as a fulcrum in FIG.
Is rotated to tilt left to the upper side, and can be easily detached from the bottom plate 31 (detachable) against the attraction force between the magnet 43 and the bottom plate 31. Further, FIG.
, Three elongated slit holes 55 are formed along the direction in which the paper piece is received.
Are also formed below the portion where is located), and a transport belt 57 is provided along each slit hole 55.

As shown in FIG. 1, each of the three transport belts 57 has a transport surface 57a between a pulley 60 fixed on a common pulley shaft 59 and a pulley 62 fixed on a shaft 61. It is hung so as to slightly protrude from the upper surface of the bottom plate 31, and is driven in the counterclockwise direction (the direction indicated by the arrow) in FIG.

Immediately before each of the conveyor belts 57, a winding roller 65 and a pinch roller 67 are provided, and the paper piece 27 sent from the printer P is sandwiched between the rollers 65, 67 into the paper receiver 35. Send in. The take-up roller 65 is driven by an idle gear 69, and the idle gear 69 is driven by a gear (not shown) fixed to the pulley shaft 59.

These constitute the above-described transport mechanism. In addition, as shown in FIG.
A guide plate 71 is provided for smoothly receiving the paper piece 27 sent between the take-up roller 65 and the pinch roller 67.

In FIG. 1, reference numeral 131 denotes a take-up shaft which is used to take up uncut continuous paper. The take-up shaft 131 is provided on the side plate 29 so as to project substantially perpendicularly to the paper piece regulating surface 29a. The take-up shaft 131 includes a take-up shaft main body 134 rotated by a drive system and a cylindrical take-up sleeve 137 that can be fitted around the main body.

Although the winding shaft 131 will be described in detail later, the rotational force of the driving motor 63 is controlled by the pulley driving gear 53,
The rotational force is transmitted to the idle gear 77 and the transmission gear 79, and its rotational force is not shown in FIG. 1, but is transmitted to the winding gear 130 via a sliding mechanism, which will be described later, and is indicated by an arrow C.
Rotate in the direction.

According to this embodiment, the paper piece 27 sent out from the printer P is sandwiched between the winding roller 65 and the pinch roller 67. It is inserted into the lower side, and is conveyed by the conveyance belt 57 while slightly floating from the upper surface of the bottom plate 31 until the leading end abuts on the paper piece contact surface 33 a of the stopper 33. In this way, the paper pieces 27 sent from the printer P are sequentially stacked on the paper tray 35 from the lower side (the lower the one sent later, the lower the stack).

Next, the paper press provided in the stacker will be described with reference to FIGS. 1, 2 and 5 to 8. 5 and 6 show the bottom plate 3 of the stacker S.
1 shows a state in which the stacking height of the above-mentioned paper pieces has reached a prescribed value. The stacker S includes a bottom plate 31 of a paper receiver 35.
A paper holder 75 that presses the paper pieces 27 to be stacked (stacked) from the upper surface side in the transport direction and the direction (paper width direction) orthogonal thereto is provided on the side plate 29 so as to be able to move up and down.

The paper presser 75 has a main body 75a extending in a direction (width direction) perpendicular to the conveying direction of the paper piece, and an L-shaped cross-section extending from the main body portion 75a along the side plate 29 in the conveying direction of the paper piece. Part 75b and the bottom plate 31 on the side plate 29
Arm 75c (FIG. 6) that protrudes to the outside through a slit 73 formed in a direction perpendicular to the extension 75b, and a slide member 75d that can extend leftward in FIG. 5 with respect to the extension 75b. .

The extension 75 of the paper holder 75
As shown in FIG. 5, two ball bearings 103a, 103a are vertically spaced from each other at a substantially central portion of b, and a bearing holding portion 75f formed by extending a part of the extension 75b upward is also used. And a first guide groove 100 is formed in the side plate 29 in a direction perpendicular to the bottom plate 31, and two ball bearings 103a, 1 are formed in the guide groove 100.
03a is rotatably fitted.

As shown in FIG. 6, two ball bearings 103b, 103b are rotatably supported near the end of the arm piece 75c at an interval in the vertical direction as shown in FIG. On the other hand, a guide plate 104 is fixed outside the side plate 29 perpendicular to the side plate 29, and a second guide groove 101 is formed in the guide plate 104 in a direction perpendicular to the bottom plate 31. Two ball bearings 103b, 10 are provided in the guide groove 101.
3b is rotatably fitted.

In this manner, the paper holder 75 is connected to the guide groove 100 formed in the center of one side plate 29 and the side plate 2.
9 along the guide groove 101 formed in the guide plate 104 attached to the outer surface of the four ball bearings 103a,
The rolling of 103b makes it possible to move up and down smoothly.

Therefore, only a very small resistance is generated between the guide grooves 100 and 101 and the paper holder 75 due to the rolling contact. For example, continuous paper wound in a roll shape is sequentially drawn out, printed thereon, and then printed. When a paper piece of a predetermined length is formed, it may be curled upward even after it is cut, but the curl position of the paper piece upward and the extension 75b of the paper holder 75 No matter where the contact is made, or when the paper width widens, it comes into contact with the main body 75a of the paper press 75 at a position far away from the supporting portion thereof.
5 always rises smoothly.

The slide member 75d of the paper holder 75 is
The vertical cross-sectional shape is an L-shape similar to that of the extension 75b, and the length of the sheet in the sheet conveyance direction is substantially the same as that of the extension 75b. Further, as shown in FIG. 7, a long hole 75e is formed in the slide member 75d from substantially the center in the longitudinal direction to the right, and a compression spring 141 is mounted in the long hole 75e as shown in FIG. 140 and insert the screw 1
40 is fixed to the extension 75b with a fastening nut (not shown).

Therefore, this slide member 75d is
The paper sheet 27 can be moved in the paper sheet conveyance direction (left and right direction in FIG. 7) along the long hole 75e, and the back surface is pressed against the extension 75b of the paper presser 75 by the urging force of the compression spring 141. Roll-up sleeve 137 (FIG. 1) for middle or roll paper (continuous paper) described later
There is no possibility of movement without permission due to vibration or the like generated during winding.

The slide member 75d is provided with a screw 1
It may be configured to rotate from the retreat position to the extended slide position shown in FIG. Meanwhile, in the rear side of the side plate 29, which only set the plate-like lever 40 which is pressing force transmitting member formed in a substantially V-shape as shown in FIGS. 9 and 10.

[0042] As a lever 40, a <br/> ball bearing 54 which is the contact member at one end and rotatably supported on the upper surface of the arm piece 75c of <br/> paper press 75 the peripheral surface It has to be able to contact. The ball bearing 54 has a stacking height of the paper pieces 27.
Until a predetermined height h shown in FIG. 9 is reached.
Press paper holder 75 via lever 40
Pressing force is applied, and the stacking height is the specified height.
When h is exceeded, the pressing force is released.

The lever 40 integrally fixes a fulcrum member 45 formed of a bearing material substantially at the center thereof.
A through hole 45a is formed at the center of 5 as shown in FIG.
An E-ring 49 is attached to the groove in one end of the through hole 45a, and a male screw portion 48a and a parallel surface 48 are formed in the other end.
A lever support shaft 48 formed with b, 48b (the back side is not seen in FIG. 11) is fitted from the male screw portion 48a side.

The parallel surface 4 of the lever support shaft 48
8b, 48b are vertically movably fitted into correspondingly elongated guide grooves 104b formed in the guide plate 104 in the guide plate 104, and the male screw portion protruding from the back surface of the guide plate 104 of the lever support shaft 48. A knob 78 is screwed onto the guide plate 48a, and the lever support shaft 48 is connected to the guide plate 10 as shown in FIG.
4 and supports the lever 40 rotatably in the direction of arrow A in FIG.

The knob 78 has an outer diameter formed so as to be rotatable by being pinched with a finger. The outer peripheral surface of the knob 78 is provided with a knurl for slip prevention as shown in FIG. It is easy to do. Accordingly, the lever 40 can be moved along the guide groove 104b by loosening the knob 78 with respect to the male screw portion 48a.
It can be moved to any position within the range of the dimension L that can be moved in the vertical direction and fixed.

When the fulcrum member 45 is fixed at an arbitrary position, the lever 40 is mounted on the upper surface of the arm piece 75c of the paper holder 75 at the lower limit indicated by the solid line in FIG. A stopper 104a having a position where the surface abuts and an outer side edge of the lever 40 indicated by a solid line in FIG. 10 is vertically suspended from the guide plate 104 (extending toward the front in FIG. 10).
Is pivoted about the fulcrum member 45 between the position where the fulcrum abuts on the fulcrum member.

A load member is provided between the lever 40 and the guide plate 104 to urge the lever 40 .
A load is applied to the paper holder 75 to suppress the lifting of the paper piece 27.
It has engaged the spring 82 that. Therefore, when the stack of paper pieces 27 is started to be stacked on the bottom plate 31 as shown in FIG. 9, the lever 40 is near the position shown by the solid line in FIG. A force for rotating in the circumferential direction acts on the paper holder 75, whereby a pressing force for pressing the paper sheet 27 via the ball bearing 54 in contact with the upper surface of the arm piece 75c is applied.

As described above, at the time when stacking with a small number of paper pieces 27 on the bottom plate 31 is started, the pressing force of the spring 82 is always applied to the paper presser 75.
The reason why the ball bearing 54 is interposed between the lever 40 and the paper press 75 is to minimize the friction of the abutting portions thereof and to press the paper press 75 by the lever 40 efficiently by the spring 82. It is.

In this manner, the paper pieces 27 stacked on the bottom plate 31 are pressed in the width direction (the left-right direction in FIG. 9) by the main body portion 75a of the paper holder 75, and the conveyance direction (the left-right direction in FIG. 5). Is held down by the extension portion 75b, so that even if the paper pieces having a curl habit due to being pulled out from the rolled state are stacked on the bottom plate 31, they are stacked in a normal state. be able to.

When the stack of paper pieces 27 is sequentially stacked on the bottom plate 31 and the stacking height thereof is gradually increased, the paper presser 75 is pushed up accordingly. Since the ball bearing 54 in contact with the upper surface of the piece 75c is also pushed up and one end of the lever 40 is pushed up, the lever 40 gradually rotates clockwise in FIG.

As described above, the lever 40 rotates clockwise with an increase in the stack amount of the paper pieces 27. At this time, the center line CL of the spring 82 is
9, that is, beyond the center of the fulcrum member 45 (on the right side in FIG. 9), from this point on, the pulling urging force of the spring 82 acts to rotate the lever 40 clockwise this time. I will be.

Therefore, the lever 40 is turned clockwise by the urging force irrespective of the stacking height of the paper pieces 27 on the bottom plate 31, so that the lever 1
It is rotated to the position shown by the solid line in FIG. Thereafter, since the ball bearing 54 of the lever 40 separates from the arm piece 75c of the paper presser 75, only the own weight of the paper presser 75 is applied to the paper piece 27 on the bottom plate 31 from this point onward.

As described above, the urging force of the spring 82 applies the pressing force for pressing the sheet by pressing down the sheet holder 75 (acting as a part of the weight function) when the sheet holder 75 starts stacking the sheet 27. Only from the position indicated by the solid line in FIG. 9 to the height h (the height when the center line CL of the spring 82 coincides with the center of the fulcrum member 45 serving as the center of rotation of the lever 40),
After that, the paper pieces 2 stacked (laminated) on the bottom plate 31
7, only the weight of the paper pieces 27 stacked thereon and the weight of the paper holder 75 are added.

However, also in this case, since the paper pieces 27 stacked to a certain height h are present on the bottom plate 31, only the weight of the paper piece 27 and the weight of the paper holder 75 due to its own weight are the lowest paper pieces 27. , Even if a paper sheet having a curl is inserted between the lowest paper sheet 27 and the bottom plate 31 as shown in FIG. can do.

When the paper pieces stacked on the bottom plate 31 are changed to those of different sizes, the lever 40 is moved up and down (in the direction of the stacking height of the paper pieces) as described with reference to FIG.
Since the position of the lever 40 is adjustable, by changing the position of the lever 40 according to the size of the paper sheet used,
Since the limit height (height h in FIG. 9) at which the pressing force by the urging force of the spring 82 is applied to the paper presser 75 can be changed, stacking can be performed under optimum conditions.

After all the paper pieces 27 have been stacked on the bottom plate 31, they are removed from the bottom plate 31 (FIG. 6).
When the attracting piece 89 is attracted to the magnetic pole piece 87a as in (1), the attraction is released, and the paper presser 75 is lowered by its own weight to the position shown by the solid line in FIG. The lower surface of the lever comes into contact with the end 40a of the lever 40 on the side where the ball bearing 54 is not attached, and stops.

Then, if the paper holder 75 is pressed down,
The lever 40 rotates counterclockwise against the urging force of the spring 82 when the end portion 40a is pressed down, and returns to the initial stack start position indicated by the imaginary line in FIG. The peripheral surface of the ball bearing 54 comes into contact with the upper surface of the arm piece 75c again by the urging force of the spring 82. In this way, this stacker is
Is applied by the spring 82 to the stacked paper pieces.
27 is the height (predetermined height) h shown in FIG.
It has a pressing force release means that is released when it exceeds
In this embodiment, the spring 82 also serving as a load member is
The lever 40 also serves as an urging force transmitting member, and also serves as a contact member.
The ball bearing 54 and the lever 40 are rotatably supported.
And the center line CL of one end of the spring 82 is
The rotation of the lever 40 when the stacking height of the piece 27 becomes h
A guide plate 104 held at a position passing through the center, and a fulcrum
The member 45, the lever support shaft 48, and the knob 78 are
Function as pressing force releasing means.

By the way, the paper piece (paper) to be printed by the printer P (FIG. 1) has a perforation 27a in the paper width direction orthogonal to the paper piece conveyance direction (arrow B) as shown in FIG. There is something with.

When stacking (stacking) this kind of paper piece on the stacker S of the type described with reference to FIG. 1, if there is a perforation 27a on the paper surface as described with reference to FIG. Since the sheet 27 'is formed, when the sheet 27' is inserted, its leading end 27c abuts against the burr 27b of the lowermost sheet 27 'already laminated on the bottom plate 31 and becomes a resistance, and it is attempted to insert more. In some cases, stacking is impossible (stacking is impossible).

The resistance due to the contact with the burr 27b increases as the stacking height of the paper pieces 27 'increases because the weight increases, and in the case of the stacker shown in FIG. (The frictional resistance of the contact portion) and the weight of the weight acting on the paper holder 75 (the weight of the paper holder 75 and the pressing force of the spring 82 acting to a predetermined height) increase.

However, if the pressing force is not applied to the paper piece on the bottom plate 31 to some extent, the paper presser 75 needs the friction required when the paper belt to be sent onto the bottom plate 31 is transported by the transport belt 57. You can't stack because you can't gain power.

Therefore, in the case of this type of stacker, the pressing force (by the use of a weight or the like) sufficient to convey the paper pieces by the conveyance belt while the number of paper sheets is stacked from zero to a predetermined height is sufficient. It is ideal if it acts on the hold down and the pressing force can be reduced at higher stacking heights.

In the stacker according to this embodiment, as described with reference to FIG. 9, the spring 82 is used only from the time when the sheet 27 is started to be stacked on the bottom plate 31 to the sheet holder 75 until the stacking height reaches the height h. Biasing force is 75
Is applied as a pressing force (working as a weight) to the lowermost one of the paper pieces 27 on the bottom plate 31 thereafter, only the weight of the paper pieces 27 stacked thereon and the own weight of the paper holder 75 are given. I try to join.

Therefore, perforations 27a shown in FIG.
In the case of stacking a piece of paper 27 'having the following, when it is inserted under the piece of paper 27' already stacked at the lowest position on the bottom plate 31 as shown in FIG. Even if it hits the burr 27b below the perforation 27a of the already stacked paper strip 27 '(FIG. 19), the paper strip 2 into which the upper paper strip 27' is inserted.
Since the force pressed against 7 'is small, the resistance generated by the tip 27c of the inserted piece of paper abutting against the burr 27b is slight, and the piece of paper 27' inserted over the same is smooth to the left in FIG. 18 as it is. And is stacked at a predetermined position.

Next, the stack full sensor provided in the stacker will be described. As shown in FIG.
As shown in FIG. 2 and FIG.
Attached and supported by its bracket 81
A stack full sensor 83, such as a photo interrupter, in which a light emitting unit 83a and a light receiving unit 83b are arranged to face each other, is attached.

On the other hand, a shutter 85 is provided on the paper presser 75 by bending the tip of an arm 75c projecting outside the side plate 29 at a right angle. Then, as the number of paper pieces 27 stacked in the paper tray 35 increases, the paper pressing 75
When the stacking height of the paper pieces 27 on the bottom plate 31 reaches a predetermined value, the shutter 85 is moved to the stack full sensor 8.
3 enters between the light emitting unit 83a and the light receiving unit 83b.

Thus, the stack full sensor 83 detects the rise of the paper presser 75 and outputs a stack full signal, and sends the signal to the printer P to stop the printing operation. Thereafter, the drive motor 63 (FIG. 1) is stopped to stop the stack operation.

The bracket 81 can be moved up and down along the slit 73, and has a size that can be rotated by a finger, and is provided with a set screw 93 provided with a knurl for preventing slip on the outer peripheral surface. It can be fixed at any position. Therefore, the bracket 81
By freely changing the height of the stack full sensor 83 attached to the device , the detection height of the stack full can be freely adjusted.

Further, as shown in FIG.
A magnet 87 having a pole piece 87a is fixed to the arm 75c of the paper holder 75.
A suction piece 89 is formed to be sucked by a. When the paper holder 75 is formed of a magnetic metal plate such as an iron plate, the suction piece 89 can be integrally formed as described above. Otherwise, the magnetic material is attached to the arm 75c. May be attached.

The main body 75a of the paper holder 75
On the upper side, a finger hook (or knob) 91 having a shape easy to lift with a finger is integrally formed. Note that the finger hook 91 or the knob may be formed by using a separate member.

In this way, the bottom plate 31 of the paper receiver 35
(FIG. 1) When taking out the bundle of the paper pieces 27 stacked thereon from there, put a finger on the finger hook 91 and press the paper holder 75.
Is lifted, and the attracting piece 89 is attached to the magnetic pole piece 87 of the magnet 87.
When the sheet holder 75 is sucked, the paper holder 75 does not descend even if the hand is released.

In this case, when the stack full is detected, the suction piece 89 of the paper presser 75 is still in the state of the magnet 87.
When the sheet holder 75 is further lifted up as described above after detecting a stack full with the shutter 85 being formed vertically long, that is, the magnetic piece 87a is not attracted to the magnetic pole piece 87a. When the positional relationship is set so as to be attracted to the magnetic pole piece 87a, it is easy to take out the paper piece 27.

Next, the winding shaft 131 used for winding the continuous paper and its driving system will be described with reference to FIGS. As illustrated in FIG. 13, the winding shaft 131 includes a winding shaft main body 134 and a winding sleeve 13 that can be fitted therein.
The winding shaft body 134 has a shaft 134a fixed at the center portion rotatably supported on the side plate 29 via a bracket 132 (FIG. 14).
3. A winding sleeve 13 is provided on the outer periphery of
7 is fitted when the roll paper (continuous paper) 15 is wound up.

The winding sleeve 137 is formed in a cylindrical shape having a slit 137b in the axial direction by, for example, molding with a resin, and a flange 137a is formed at one end of the cylindrical shape. In addition, the winding shaft main body 134 does not
When the tapered shape is used, the winding sleeve
137 can be smoothly fitted. Rotational force from the drive motor 63 is transmitted to the shaft 134a of the winding shaft 131 via the drive force transmission mechanism 1 in which a number of gears and the slide mechanism 2 are combined as shown in FIG. It rotates in the direction in which the continuous paper 15 is wound (in the direction indicated by the arrow C in FIG. 13).

The driving force transmission mechanism 1 includes a driving motor 63
The pulley drive gear 53 is engaged with the drive gear 41 fixed to the rotary shaft of the idle gear 77, and the large diameter portion of the idle gear 77 is engaged with the pulley drive gear 53.
7 is engaged with the transmission gear 79, and the rotational force of the transmission gear 79 is further applied to the slip gear 133 by the friction material 80.
Of the slip gear 1
33, a take-up gear 130 integral with a shaft 134a is engaged.

The slip gear 133 is in contact with a friction material 80 made of felt or the like attached to the left end face of a transmission gear 79 rotatably supported on a shaft 135 in FIG. Is in contact with the friction material 80 adhered to the pressing plate 136 rotatably fitted into the cylindrical portion 79a of the transmission gear 79.

A male screw portion is formed on the outer peripheral surface of the cylindrical portion 79a of the transmission gear 79 on the distal end side.
38, a compression coil spring 139 is interposed between the spring support 138 and the holding plate 136, and the pressing force of the pressing plate 136 is approximately the same as that of the slip gear 133.
To the slip gear 133 side, and the slip gear 1
33 is sandwiched between the two friction members 80 so that a predetermined frictional force is generated therebetween when the slip gear 133 rotates.

According to the sliding mechanism 2, the transmission gear 79
When the transmission torque between the transmission gear 79 and the slip gear 133 becomes equal to or greater than a predetermined value, slip occurs between the gears via the friction material 80, and the rotational force from the transmission gear 79 is not transmitted to the slip gear 133. .

Therefore, according to the driving force transmission mechanism 1 having the sliding mechanism 2, the rotational force from the driving motor 63 is sequentially transmitted to the transmission gear 79, and the rotational force is transmitted to the slip gear 133 via the friction material 80. Is transmitted by the generated frictional force, and the rotational force is transmitted via the winding gear 130 to the winding shaft 1.
The take-up sleeve 131 of the take-up shaft 131 rotates in the direction of arrow C in FIG.

As apparent from FIG. 14, the pulley driving gear 53 to which the rotational force from the driving motor 63 is transmitted.
Has also been described with reference to FIG. 1, but also drives the transport mechanism for stacking the cut pieces of paper. That is, three pulleys 62 are fixed at a predetermined interval on a shaft 61 having a pulley driving gear 53 fixed to one end, and transport belts 57 for transporting the cut pieces of paper are wound around the pulleys 62, respectively. ing.

FIG. 15 is a perspective view showing a different embodiment of the pressing force canceling means. Parts corresponding to those in FIGS. 9 and 10 are denoted by the same reference numerals, and their description is omitted. This fruit
In the embodiment , the load for suppressing the lifting of the paper piece is
Magnet 1 which is a load member for applying (pressing force is exerted by giving resistance to the rise of the paper presser 75).
43 is fixed to the guide plate 104, and the magnetic pole piece 143a of the magnet 143 is located at a position where the shutter 85 of the paper presser 75 can be attracted. Then, the position of the pole piece 143a in the height direction is set to a position where the pole piece 143a sucks the shutter 85 when the height of the paper presser 75 is equal to or less than the height h described in FIG.

Therefore, in order to raise the paper holder 75 when the number of paper pieces stacked on the bottom plate 31 is relatively small, the attraction force f of the magnet 143 and the magnetic pole piece 14
A resistance force represented by the product of the friction coefficient μ on the friction surface between the shutter 3a and the shutter 85, ie, μf is generated.

While the shutter 85 integrated with the paper presser 75 is being attracted to the pole piece 143a of the magnet 143, the spring 8 described with reference to FIGS.
The load due to the attraction force of the magnet 143 corresponding to the urging force of 2 applies to the paper presser 75, the stacking height of the paper pieces on the bottom plate 31 increases, and the paper presser 75 is pushed up by the rising paper surface to a certain height. (The height corresponding to the height h in FIG. 9), the shutter 85 starts from that point.
Move away from the pole piece 143a.

As a result, the shutter 85 is not attracted by the magnet 143, and thereafter, as in the case of the embodiment described with reference to FIG. Only to be added. Therefore, after that, the paper holder 75 is
The stack full height (not shown in FIG. 15, but the detection unit of the stack full sensor 83 shown in FIG. Height).

After the stacked paper pieces are removed from the bottom plate 31, if the paper presser 75 is lowered to the lower limit, the shutter 85 is again put on the magnetic pole pieces 14 of the magnet 143.
3a comes to be adsorbed and returns to the state at the beginning of stacking. In this embodiment, the shutter 85 is a load member.
The paper holder 7 reduces the load (adsorption force) of a certain magnet 143.
5 functions as a pressing force transmitting member that transmits the pressing force to the pressing member 5. Also the bottom
If the stack height h of the paper pieces on the plate 31 (see FIG. 9) is exceeded,
So that the load on the gnet 143 is released.
Shutter 85 also serving as a pressing force transmitting member whose position is set
And the magnet 143 also serving as a load member releases the pressing force
Functions as a means.

FIG. 16 is a perspective view showing still another embodiment of the pressing force releasing means, in which parts corresponding to those in FIG. 15 are denoted by the same reference numerals and their description is omitted. In this mechanism , a rotary damper 144 serving as a load member is mounted on the guide plate 104, and a pinion 145 of the rotary damper 144 is disposed so that a pinion support shaft 145a integral therewith rotates perpendicularly to the guide plate 104. The pinion 145 is engaged with a rack 75g formed at a portion where one end of the paper holder 75 is extended.

The rotary damper 144 applies resistance only to the rotation of the pinion 145 in the clockwise direction indicated by the arrow E in FIG. Therefore, paper holder 7
When the rack 5 is raised at a position where the rack 75g and the pinion 145 engage with each other, a resistance (load) by the rotary damper 144 acts on the paper presser 75.

Then, the rack 75 g and the pinion 14
The position where the meshing of No. 5 can be released is set to a height at which the paper presser 75 reaches the height h described in FIG. Therefore,
FIG. 9 explains that the stacking amount of the paper pieces on the bottom plate increases and the paper holder 75 exceeds a certain height (height h in FIG. 9), and the engagement between the rack 75g and the pinion 145 is released.
As in the case of the embodiment , thereafter, only the weight of the paper presser 75 is applied to the upper surface of the stacked paper pieces.

Therefore, the resistance (load) generated by the rotary damper 144 acts as a weight that applies a pressing force to the upper surface of the paper sheet, when the rack 75g and the pinion 145 are engaged with each other.

After the stacking of the paper pieces is completed, the paper pieces are removed from the bottom plate and the paper holder 75 is lowered, and the rack 75g engages with the pinion 145 in the process of lowering, but the pinion 145 rotates counterclockwise. Since the load by the rotary damper 144 does not act, the pinion 145 rotates with a light load without receiving any resistance, and returns to the position at the start of stacking.

The same effect can be obtained by using a friction wheel as a rotary damper without using a rack and a pinion with this mechanism, and providing a frictional contact surface in contact with the friction wheel on the paper holder 75. can get. Note that this embodiment
The rack 75g is a rotary damper that is a load member.
Pressing force transmitting unit that transmits the load of 144 to the paper presser 75
Functions as a material. Also, the stack height h of the paper pieces (see FIG. 9)
), The load on the rotary damper 144 is released.
That also serves as a pressing force transmitting member
75g and rotary damper 14 also serves as load member
4 function as pressing force releasing means. Note that FIG.
Also, in the embodiment of FIG. 16, if the positions of the magnet 143 and the rotary damper 144 can be moved and adjusted in the stacking direction of the paper pieces as described in the embodiment of FIG. The working range of the load acting as the pressing force on the presser 75 can be changed arbitrarily, which is more convenient.

[0092]

As described above, according to the present invention, when the stacking height of a piece of paper is lower than a predetermined height, the load that suppresses the lifting of the piece of paper by the load member is provided.
Since the pressed more given et the paper pressing is higher than a predetermined height when suppressing load floating of the sheet piece is released the pressing force of the paper strip is weakened, or paper pieces are curled, Even in the case of perforated paper, it is possible to suppress the floating of the paper pieces irrespective of the lamination height, to reduce the resistance when inserting the paper pieces, and to reliably stack the paper pieces.

Further, the pressing force releasing means is applied to the paper press.
If a mechanism is provided to adjust the predetermined height of the paper piece from which the load to be released is released, the predetermined height can be arbitrarily changed. The above-mentioned predetermined height can be selected optimally, so that the reliability is further increased.

[Brief description of the drawings]

FIG. 1 is a side view showing a schematic configuration of a state in which a stacker according to an embodiment of the present invention is attached to a printer, omitting details.

FIG. 2 is a plan view of the stacker.

FIG. 3 is a side view showing a stopper 33 provided in the stacker shown in FIG.

4 is a front view of the stopper 33. FIG.

FIG. 5 is a sheet retainer 7 provided in the stacker of FIG.
It is a side view which shows 5 and its periphery.

FIG. 6 is a front view of the same.

FIG. 7 is a slide member 75 of the paper presser 75;
It is a side view which shows the state which extended d.

FIG. 8 is a plan view showing a mounting portion of the slide member 75d.

9 is a front view for explaining a pressing force canceling means 20 provided on the back side of a back side plate 29 of the stacker in FIG. 1;

FIG. 10 shows a lever 40 of the pressing force releasing means 20;
Is a front view showing a state in which the paper presser 75 has been rotated to a position where the paper presser 75 is moved by moving up.

11 is an exploded perspective view for explaining a structure of a support portion of the lever 40 of FIG.

12 is a plan view showing the pressing force switching means 20 of FIG. 9 and its vicinity.

13 is a winding shaft 13 provided in the stacker of FIG.
FIG. 2 is a perspective view for explaining the configuration of FIG.

FIG. 14 is a plan view showing the driving force transmission mechanism 1 for driving the winding shaft 131.

FIG. 15 is a perspective view showing another embodiment of the pressing force releasing means provided in the stacker of FIG. 1;

FIG. 16 is a perspective view showing still another embodiment of the pressing force releasing means.

FIG. 17 is a plan view and a side view showing a perforated paper piece 27 ′.

FIG. 18 is a schematic diagram for explaining a state in which stacking becomes impossible when the perforated paper piece 27 'is inserted below the stacked paper pieces.

FIG. 19 also shows the leading end 27 of the inserted paper piece 27 '.
It is the schematic which expands and shows the state which contact | abutted the burr 27b of the paper piece with which c was laminated | stacked.

[Explanation of symbols]

Reference Signs List 20 pressing force releasing means 27, 27 'sheet piece 31 bottom plate 33 stopper 40 lever 54, 103a, 103b ball bearing 57 transport belt 75 paper holding 82 spring 104 guide plate 104b guide groove S stacker P printer

Claims (2)

(57) [Claims] 1. A stacker that transports and cuts a cut piece of paper so as to be inserted sequentially below a previously stacked piece of paper and presses the stacked piece of paper from above to form a new sheet. A paper press that suppresses the lifting of stacked paper fragments caused by the insertion of a piece, and a paper press that suppresses the lifting of the paper fragments by the paper press.
A load member for applying a load to control
Contact directly or indirectly through the contact member,
Transmitting the load of the load member to the paper presser in a contact state.
And the load applied to the paper presser
When the stacking height of the layered paper pieces exceeds a predetermined height
And a pressing force releasing means to be released is provided.
Stacker . 2. The stacker according to claim 1, wherein a mechanism for adjusting the predetermined height is provided in the pressing force releasing means.