JPS60252569A - Paper folding device in copying machine with bookbinding function - Google Patents

Abstract

PURPOSE:To form a fold in the center of the paper by providing a pair of reversible conveyor rollers and a paper folding roller on a paper folding unit and further providing a stopper stopping the paper by being hit by the tip of the paper and a pair of peeling rollers peeling the folded paper. CONSTITUTION:The tip of the paper passes conveyor rollers 47, 48 and hits a stopper 54 and is stopped. Since the paper P is further conveyed, it starts to be bent near the end of a passage 50, and the bent paper P is bitten between the roller 47 and a paper folding roller 49 to form a fold in the center of the paper P. The folded paper P is conveyed in the direction of peeling rollers 52A, 52B having different peripheral speeds in a passage 51 and is bitten, and the paper P is peeled. When one half of the preceding paper P is hooked by a separation claw member 53, the paper P is expanded as shown by an imaginary line. Next, the rollers 47, 48, 49, 52A, 52B are rotated in the broken line arrow direction, and the paper P passes from a passage 51 to a passage 50 and is conveyed to conveyor rollers 55, 55.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a copying machine equipped with a bookbinding device and capable of saddle-stitching sheets, and particularly to a sheet folding device that forms creases in the sheets in advance. Regarding.

[Prior art]

Conventionally, when copying multiple copies of multiple sheets of original, it is necessary to use a sorter or collation device to align the page order of the copied sheets, and to use a stitcher to bind the edges of the sheets. It was being done.

However, if you end-stitch large 4-noise paper such as A3 or B4, it will take up a lot of space in the child's open poem, making it difficult to handle. In addition, in the case of large 4-size paper, the edges of the paper are sometimes folded in half at the center in order to reduce the space required for storage.
Folding all the sheets together makes it look bad when stored, and the way the sheets are folded makes it difficult for children to see the information on the folded sections.

To overcome this problem, it is possible to saddle-stitch the sheets, but in order to saddle-stitch the sheets (31) it is necessary to form a crease in the center of the sheets in advance. It's hard.

[Purpose of the invention]

In view of the above-mentioned points, the present invention provides a paper folding device that can reliably form creases one sheet at a time in the middle heat section of the paper, and that can be used in a copying machine equipped with a bookbinding function. Write the purpose.

[Embodiments of the invention]

The present invention will be explained below with reference to embodiments shown in the drawings.

FIG. 1 shows a copying machine 1 equipped with a bookbinding function according to the present invention.A contact glass 3 is provided in the upper part of a casing 2 of the copying machine 1, which is stretched horizontally. A recirculation type document handling device 4 is disposed within the casing 2 on the -L side of the contact lath 3. This document handling device 4 has a document tray 6 facing into the -L section opening 5 of the casing 2, and this document tray 6 is located almost directly above the contact glass 3. An opening is formed in the lower surface of one end of the original 1-Reiro, and the opening is wound around a pair of pulleys 7.7, and the originals 1-
A delivery belt 8 for sending out the originals in the reiro one by one in the right direction starting from the lowest one is facing. A pair of separation rollers 9, 9 for ejecting the upper part of the two-sheet original document are disposed on the right side of the delivery belt 8, and the original document ] A large-diameter roller 10 is provided to reverse the rotation. This roller 10
A plurality of rollers 11 and 12 for conveying the document along the roller 10 are in pressure contact with the outer periphery of the roller 10, and an arc-shaped passage 13 is formed along the outer periphery of the roller 10. A horizontal passage 1/l is formed from the lower end of the roller 10 to the contact glass 3, and the contact glass 30 has a pair of pulleys 15,
A conveyor belt 16 wound around 15 is in pressure contact with the conveyor belt 16 . Further, an inclined reversing passage 17 is formed which communicates the passage 13 near the separation rollers 9 and the end of the contact glass 3, and A switching pawl member 18 for closing either one of the passages 13, 17 is disposed.

A large-diameter roller 19 is disposed on the left side of the contact glass 3, and the roller 19 rolls the original 85D on the contact glass 3 to the outer periphery of the roller 19.
A plurality of rollers 20 and 21 are in pressure contact with each other. Further, an arc-shaped passage 22 is formed along the outer circumference of this []-ra 19, and a passage 23 for returning the original to the original tray 6 is connected to the rear end of this passage 22. , a pair of rollers 24 are provided at the rear end of the passage 23 for discharging the originals in the passage 23 onto the original tray 6.
゜24 is arranged.

When necessary, the switching claw member 18 is switched from the position shown in the figure to such an Ijl document handling device row 4 (original that has been fed from the document tray 6 onto the contacts 1 to glass 3 and exposed on one side). At the same time, the conveyor belt 16 on the contact glass 3 is run in the opposite direction from the passage 14 to the passage 1.
By conveying the document in the order of 3.17, making one revolution around the roller 10, turning it over, and stopping it again on the contact glass 3, the back surface of the document can be exposed continuously.

A copying device 25 with a variable magnification function is disposed in the casing 2 below the glass 3 of the above-mentioned printer 1.
This copying device 25 has a developing section 26, and this developing section 26
has a photosensitive drum 28 that receives light from an optical system 27 that exposes the document on the contact glass 3 to form an electrostatic latent image.

Various chargers, developing devices, cleaning devices, etc. are arranged around the photosensitive drum 28.
Since these configurations are similar to those of a general copying machine, a description thereof will be omitted.

A plurality of paper cassettes h29 are provided on the end surface of the casing 2.
．． 29... are installed, and the sheets of paper P are sent out one by one from each installed paper saw set 29.
Rollers 30, 30, . . . are disposed within the casing 2. Further, the paper P sent out from each paper cassette 29 is conveyed through a passage 31a, and each passage 31a merges into a passage 31b to reach the developing section 26. ing. Conveying rollers 33, 33, . . . are arranged in this passage 31b. One end of the transport bells 1 to 32 faces near the developing section 26, and the developing section 26 transports the paper P on which the 1 to toner images on the photoreceptor drum 27 have been transferred. A fixing section 34 is disposed at the other end of the conveyor belt 32, and is configured to fix the 1-toner image on the paper P.

On the downstream side of the fixing section 34, there is a passage 3 that curves upward.
6 is arranged Δ, and this passage 36
Conveying rollers 37, 37 are arranged. The reversing unit 35 is configured to reverse the sheet 1 by sending out the sheet P introduced from the front end from the rear end. Also,
A switching pawl member 38 is disposed near the reversing section 35, and the sheet 1 from the fixing section 34 is placed in the reversing section 35 or another casing 44 (the sheet folding section described later). 45. An intermediate tray 39 is disposed at the bottom of the casing 2, and is configured to subsequently store the paper 1) introduced into the reversing section 35 and reversed. ing. For this purpose, a passage 40 equipped with a conveyance roller 41 is provided between the reversing unit 35 and the intermediate tray 39. Note that the paper P from the fixing unit 34 is not introduced into the reversing unit 35, but directly from the passage 40. It is also possible to introduce it into intermediate 1 to ray 39.

At the front end of the intermediate tray 39, rollers 43, 43, . The paper P sent out from 39 is again supplied to the developing section 26 via a passage 42 that joins the passage 31b.

In order to perform double-sided copying using the copying apparatus 2 described above, the switching claw member 38 is raised and the paper P from the fixing section 34 is transferred to the reversing section 35.
J: Operation button (not shown) introduced in
Press '? Then, an electrostatic latent image is formed on the photoreceptor tram 27 by the light from the optical system 27 that scans the document on the container 1 to the glass 3, and this electrostatic latent image is transferred to the developing device. It is visualized by i-ner from. On the other hand, paper P from the selected paper cassette 29 is supplied to the developing section 26 via passages 31a and 31b, and the toner image on the photoreceptor drum 270 is transferred thereto. The paper P to which this toner image has been transferred is fixed with 1 to no images in the fixing section 34, and then transferred to the reversing section 35.
is introduced into the passageway 36 of. When the rear end of the paper P is completely introduced into the passage 36, the transport rollers 37, 3
7 is reversed, the paper P is introduced into the passage 40 from the rear end, and the paper P is fed into the intermediate 1 helay 39. The paper P stored in the intermediate tray 39 has an image transferred onto its upper surface.

In this way, once a predetermined number of single-sided copied sheets P are stored in the intermediate tray 39, from now on, the intermediate tray 39
The paper P in 9 is sent out one by one and supplied to the developing section 26 again to copy an image on the back side of the paper P. Since the switching claw member 38 is now switched to the state shown in FIG. 1, the paper P for double-sided copying is supplied from the fixing section 34 to the paper folding section 45.

If copying is to be performed only on the lunar surface of the paper, it is sufficient to set the switching claw member 38 in the state shown in FIG. 1 from the beginning.

The paper folding unit (paper folding device) 45 makes a crease in advance in the center of the paper P to be saddle-stitched and folds it into an A3 paper.
This paper folding unit 45 is for: 1) IIt2 L for the casing 2;
The paper folding section 45 has a pair of conveying rollers 4.7.48 at its entrance, as shown in detail in FIG. Furthermore, four paper folding rollers located downstream of both rollers 47 and 48 are connected to the one conveyance roller 47. Both the conveyance rollers 47° and 48 are capable of reversing, and therefore,
The paper folding roller 49 connected to the conveying roller 47 also rotates in both directions. A passage 50 is formed on the downstream side of the rollers 47 and 48, and the base end of this passage 50 is inclined forward in the direction of the joint between the roller 47 and the paper 111 and the roller 49. P is both rollers 47.
It is designed to fit into the joint of 49.

A passage 51 is formed at the back of the joint between the transport roller 47 and the paper folding roller 49, into which the paper P with a fold 1 formed in the middle part is introduced, and at the rear end of this passage 51, a , a pair of peeling rollers 5'2A connected to each other,
52B is arranged.

When these peeling rollers 52A and 52B rotate in the direction of the solid arrow to bite the paper P in the passage 51, the circumferential speed of one of the peeling rollers 52B becomes faster than the circumferential speed of the other peeling roller 52A. When rotating in the opposite direction, one side follows the other so that they rotate at the same circumferential speed. In addition, one side of the peeled filil
A claw member 53 is provided near the o-roller 52B and is rotatable about @53a so as to be in a position close to the peeling roller 52B and a position away from the peeling roller 52B. has been done.

A stopper 54 that rotates around 11M1l 54 ;i and can take a retracted position faces inside the passage 50, and a pair of conveyance rollers 55, 55 are disposed at the tip of the passage 50. It is set up. The stoppers 54 may be provided in several numbers according to the size of the paper P, or may be configured to move according to the size of the paper P being used.

In the casing 44 on the downstream side of the conveyance rollers 55, 55, there is disposed a non-binding tray 5G which rotates around a shaft 56a between the solid line position and the chain line position in FIG. Non-binding 1 to lay 56 are unfolded sheets P that do not need to be bound from the paper folding section 45 at the chain line position.
When the paper P to be bound is conveyed from the paper folding section 45, it rises to the solid line position and retreats.

A paper binding section 57 is provided in the casing 44 below the non-binding tray 56.

This paper binding unit 57 is arranged so as to be able to be bent down, and includes a stapler-like binding member 58 that binds the sheets of paper P using a fastener such as a stable, and a receiver disposed below this binding member 58.
It has a receiving seat 59, and a receiving t at the upper end of this receiving seat 59.
The surface 60 is formed into an acute edge shape so that the folds of the sheets P folded at the center by the sheet folding section 45 are aligned and the sheets P are stacked one on top of the other. Further, the receiver is provided with a pair of flat guide plates 63 and 64 rotatably supported by support shafts 61 and 62 in the vicinity of the receiving surface 60 of the receiver seat 59, respectively. The guide plates 63 and 64 are movable between the solid line position and the chain line position in FIG.

A fixed wall plate 65 is erected on one side of one of the guide plates 64 as shown in FIG. A wall plate 66 is erected and is movable in a direction perpendicular to the direction. This configuration is achieved by forming the base of the wall plate 66 and the guide plate 64 into a comb-like shape that interlocks with each other.

Incidentally, this wall plate 66 is adapted to move to a retracted position as shown by the chain line in FIG. Roughly, the wall board 6
On the outside of the guide plate 64, uneven width rollers 67 are protruded to press against the paper P on the guide plate 64 and bring the two adjacent sides of the paper P into contact with both walls 65 and 66. has been done. The axis of the width adjustment opening 67 is arranged to intersect the axis of the support shaft 62, and the width adjustment roller 67 can move toward and away from the paper P on the guide plate 64. There is.

A tray 68 is disposed below the guide plate 64, as shown in detail in FIG. They face each other at θ2. And this angle θ
, by setting θ2 to an appropriate angle, the edge-stitched paper P1 that has slipped off the guide plate 64 [M1-Reiro 8--] is aligned with the edge 69, and the saddle-stitched paper P2 is They will be aligned along the other side 70 of the tray 68.

Saddle-stitch binding of sheets P by the bookbinding device 46 comprising the sheet folding section 45 and sheet binding section 57 described above will be described.

The paper P conveyed from the fixed answer section 34 to the paper folding section 45
The leading edge of the sheet P passes through the conveyance rollers 4, 7, and 48, and comes into contact with a stopper 54, which is arranged in advance to match the size of the sheet P, and is stopped.

Then, as the paper P is subsequently transported by the transport rollers 47 and 48, the paper P begins to warp near the end of the passage 50, and this warped paper P is caught between the transport roller 47 and the paper folding roller 49. A crease is formed in the center of the C paper P. The paper P that has been caught between both rollers 47° and 49 and has a crease formed therein passes through the passage 51 and passes through the peeling rollers 52A and 52.
One half of the paper P that is conveyed in the B direction, is caught between the peeling rollers 52Δ, 52B, and contacts the peeling roller 52IB with a fast circumferential speed due to the different circumferential speeds of the two eye rollers 52A, 52B, and is peeled off with a slow circumferential speed. The other half of the paper P that is in contact with the roller 52A peels off both sides of the paper P in advance. Then, when one half of the preceding paper P is caught on the separation claw member 53, a sensor (not shown) detects that the paper P is caught on the separation claw member 53, and a signal from this sensor is sent to the separation claw member 53.
3 rotates to the imaginary line position, and the paper P is expanded as shown by the imaginary line. Further, each roller 47, 48 . /1.9. Since 52A and 52B are rotated in the reverse direction in the direction of the dashed arrow, and the stopper 54 is retracted from the passage 50, the sheet P, which has been spread out and made into a substantially flat state, is removed from the passage 51. The paper passes through a passage 50 and is supplied to a paper binding section 57 by conveyance rollers 55 , 55 .

When paper P with a crease formed in the center is supplied, both guide plates 63 and 64 of the paper binding section 57 are arranged so that the leading end of the guide plate 64 is positioned slightly downward, as shown by the solid line in FIG. are located in the same plane and are inclined. Note that, at this time, the non-binding portions 1 to 56 are located at the solid line positions in FIG. 3.

In this state, the sheets P supplied to both guide plates 63 and 64 are moved one by one to come into contact with both wall plates 65 and 66 by the action of the opening 67. All the sheets P that make up the booklet are placed on both guide plates 6.
3.64, the wall plate 66 is moved in the direction of the support shaft 62, and the paper P is moved so that the fold of the paper P is positioned on the edge of the G receiving seat 59.

Then, both guide plates 63 and 64 are rotated to the chain line position in FIG. Then, the binding device 58 is lowered to bind the sheets P along the folds of the sheets P.Finally, one of the guide plates 63 is rotated to the solid line position, and the wall plate 66 is retracted. The bound sheets P slide down along the guide plate 6/I and are accumulated in the tray 68.

FIG. 6 shows another embodiment of the paper folding device 45 according to the present invention, in which both peeling rollers 52A are used.

An inclined paper guide plate 71 is arranged behind the paper 52B, and conveyance rollers 72 and 72 are provided on this guide plate 71. Furthermore, a conveyance path (not shown) faces the end of the guide plate 7'1, and the end of this conveyance path reaches the paper binding section.

According to such a configuration, the paper P that has been caught between the transport roller 47a5 and the paper folding roller 49 and has been folded is spread out on the guide plate 71, and then
The paper passes through and is supplied to the paper binding section.

According to this embodiment, unlike the above-mentioned /j embodiment, it is not necessary to control each roller in the reverse direction.

〔Effect of the invention〕

As explained above, the paper folding device in a copying machine equipped with a bookbinding function according to the present invention includes a pair of conveyance rollers that are installed at the entrance section and can be reversed, and a pair of conveyance rollers located downstream of these conveyance rollers. a paper folding roller located downstream of these rollers and connected to one of the transport rollers, a stopper that contacts the leading edge of the paper and stops the paper; Phase H is used to separate the two halves of the paper that have been jammed and formed creases.
Since it has a pair of peeling rollers that join at different circumferential speeds, it is possible to form a crease for saddle stitching in the center of each sheet, making it possible to easily perform saddle stitching on a copying machine. can be understood.

[Brief explanation of drawings]

FIG. 1 is a schematic front view showing an embodiment of a copying machine to which a paper folding device according to the present invention is applied, FIG. 2 is an enlarged view of the paper folding device (paper folding section) in FIG. 1, and FIG. 1 is an enlarged view of the paper binding section, FIG. 4 is a plan view of the main part of FIG. 3, and FIG. 5 is a front view showing the relationship between the 1q paper binding section and the tray shown in FIGS. 3 and 4. 6 are front views showing other embodiments of the paper folding device. DESCRIPTION OF SYMBOLS 1... Copying machine, 2... Casing, 3... Contact glass, 4... Recirculating original handling device, 6...
・Document tray, 25... Copying device, 26... Developing section, 28... Photoconductor, 2... Paper cassette, 34.
...Fixing section, 35... Reversing section, 39... Intermediate 1 to lay, 44... Casing, 45... Paper folding section, 4
γ, 48... Conveyance roller, 49... Paper folding roller, 52Δ, 52B... Peeling roller, 53... Separation claw portion, 511... Stopper, 56... Non-binding tray, 57 ...Paper binding section, 58...Binding tool, 59.
・・Bake is seat, 63.64・・Guide plate, 65, 66・
...Wall board, 67...Width adjustment roller, 68...Tray,
71... Guide plate, 72... Conveyance roller, D...
Manuscript, P... paper. Applicant's agent Inomata Erased Figure 1 Figure 2

Claims (1)

[Claims] 1. A pair of reversible transport rollers provided at the entrance, a paper folding roller located downstream of both of these transport rollers and joined to one of the transport rollers, and a paper folding roller that is connected to one of the transport rollers. A stopper faces the downstream side and stops the paper by coming into contact with the leading edge of the paper, and a stopper is inserted between the paper folding roller and one of the conveyance rollers to separate the two halves of the paper that form the iT fold. A paper folding device for a copying machine equipped with a bookbinding function, characterized in that it has a pair of paper folding machines that join at different speeds. 2. The paper folding device according to claim 1, wherein a separating claw part for separating both halves of the sheet peeled by the peeling roller is disposed near the peeling roller. 3. The paper folding device according to claim 1, wherein a path is provided in the vicinity of the peeling roller to transport the sheet peeled off by the peeling roller in a substantially planar shape.