JP3242714B2 - Paper folding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper folding machine which folds a sheet (paper) in a first direction and then folds the sheet (paper) in a second direction orthogonal to the first direction, and more particularly to an advertisement for direct mail. The present invention relates to a folding machine suitable for folding paper or the like.

[0002]

2. Description of the Related Art Conventionally, when a sheet is folded in two, a folding position determining unit which is constituted by a sheet entrance path and a stopper and determines a folding position of the sheet is disposed near an entrance of the folding position determining unit. A folding machine equipped with a pair of folding rollers that rotate by bringing their peripheral surfaces into contact with each other is used (Japanese Patent Application Laid-Open No. 57-203647 and Japanese Utility Model Application Laid-Open No. 60-16460).

In this type of folding machine, first, a sheet is made to enter a sheet entering path of a folding position determining unit. When the leading end of the sheet comes into contact with the stopper and the sheet bends near the entrance of the sheet approach path, the bent portion is caught by the pair of folding rollers, and the sheet is folded while passing between the folding rollers. It is supposed to be.

[0006] When mailing an advertisement using various fixed-size papers such as A4 size or B4 size as direct mail, the advertisement paper is usually folded in two as shown in FIGS. 6 (a) and 6 (b). After that, the sheet is further folded in two or three in a direction orthogonal to the folding line, and folded into a shape to enter the envelope. For example, A3 standard paper is generally shown in FIG.
As shown in (a), the sheet is folded into two from the center, and further folded in three in a direction perpendicular to the folding line, and sealed in an envelope.

In the case of folding into such a shape, conventionally,
First, after a sheet (advertisement paper) is folded in two in a first direction by a first folding machine, the sheet is put into a second folding machine and folded in three in a second direction. ing.

In addition, a first sheet for folding a sheet in a first direction is provided.
And a second folding unit that folds the sheet folded by the first folding unit in a second direction orthogonal to the first direction. is there. In the case of this folding machine, a sheet folded in two in the first direction at the first folding section is conveyed to the second folding section, and the sheet is folded in the second direction at the second folding section. It is folded in three.

[0007]

However, the former method has a disadvantage that the operation is complicated because a plurality of steps are required. On the other hand, the latter method has a problem that the folding machine tends to be large in size and the device is difficult to spread.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a folding machine which is suitable for folding advertising paper for direct mail and which can be easily miniaturized. .

[0009]

A folding machine according to the present invention comprises:
A sheet folding means for folding the sheet in two, and a groove extending in the circumferential direction provided at a predetermined position in the length direction thereof, for conveying the sheet folded by the sheet folding means in a direction perpendicular to the folding line Grooved roller, a creased die roll shaft disposed parallel to the grooved roller axis, a creased die roll shaft rotating means for rotating the creased die roll shaft, and the groove of the creased die roll shaft An eccentric bearing fixed at a position corresponding to the groove of the grooved roller, and a circle rotatably supported by the eccentric bearing and selectively fitted into the groove of the grooved roller by rotation of the creasing die roll shaft. And a plate-shaped creasing die roll.

[0010]

In the present invention, the sheet folded in two by the sheet folding means constituted by, for example, a folding position determining unit and a folding roller is conveyed in a direction perpendicular to the folding line by a grooved roller. At this time, a disk-shaped scoring die roll is selectively fitted into a groove provided in the grooved roller, and when the sheet passes between the grooved roller and the creasing die roll, the creasing die roll is used. The sheet is pressed by the circumference of crease to make a crease on the sheet. Thus, one or a plurality of folding lines can be formed on the sheet folded by the folding means.

In the present invention, since the creasing die roll is rotatably supported by the eccentric bearing,
By rotating the creasing die roll shaft to which the eccentric bearing is fixed, the distance between the grooved roller and the creasing die roll changes, and as described above, the creasing die roll is inserted into the groove of the grooved roller. Can be selectively fitted.

Conventionally, in an apparatus for folding a sheet in two directions orthogonal to each other, two or more sets of a folding position determining unit and a folding roller having a sheet entrance path are required. However, since the folding machine according to the present invention requires only one set of the folding position determining unit and the folding roller, the apparatus can be downsized. Further, the folded shape of the sheet can be easily changed only by changing the rotation angle of the creasing die roll shaft by the creasing die roll shaft rotating means.

[0013]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic plan view showing a folding machine according to an embodiment of the present invention, and FIG. 2 is a side view thereof. The bundle of sheets to be folded is placed on the paper feed table 12. A width guide plate 12a is provided on a side portion of the paper feed table 12, and
The mounting position of the sheet bundle is specified.

On the extension of the paper feed table 12, a paper feed plate 13 is provided. The sheet supply plate 13 is rotatable about a shaft 13 a that supports an end on the sheet supply table 12 side, and the other end is urged toward the sheet supply roller 16 by a spring (not shown). Is done. The sheet on the sheet supply plate 13 is sent out from the sheet supply plate 13 by the sheet supply roller 16 and is conveyed along the sheet supply guide plate 21.

In the middle of the paper feed guide plate 21, a separating plate 15 is mounted and arranged on the separating table 14. The separation plate 15 is disposed so as to substantially contact the sheet feeding roller 16, and when two or more sheets are simultaneously conveyed, the frictional force between the sheet feeding roller 16 and the sheet and the separation plate 1
The sheet is separated and fed one by one using the difference between the frictional force between the sheet 5 and the sheet and the frictional force between the sheets.

A guide plate 22 is provided on the downstream side of the separating plate 15 in the sheet flow direction, and the sheet that has passed between the paper feed roller 16 and the separating plate 15 is guided by the guide plate 22 so that the rollers 17, Enter between 18. This roller 17,
Each of the peripheral surfaces 18 is covered with rubber, and the peripheral surfaces are brought into contact with each other to rotate.

The sheet having passed between the rollers 17 and 18 is guided by a guide plate 25 and enters a slit 35 between the idle roller 31 and a flexible thin plate 34. The idle roller 31 is a disk-shaped member formed of resin and is rotatably attached to the pivot 30. This pivot 30
Are rotatably supported by the side plate 10. A fixed member 33 is fixed to the pivot 30 with an idle roller 31 interposed therebetween, and a plate-shaped stopper 32 is fixed to the fixed member 33. The pivot 30 is a shaft for setting the position of the stopper 32, and is usually locked and fixed by an angle setting mechanism (not shown). Is released and it becomes rotatable.

On the other hand, the flexible thin plate 34 is formed by arranging a band-shaped plastic plate having a smooth surface curved along the outer periphery of the idle roller 31, and both ends thereof are fixed by fixing members 36. Although the thin plate 34 is easily deformed due to its material, the thin plate 34 is disposed so as to face the peripheral surface of the idle roller 31, so that extreme deformation and breakage can be avoided.

In the vicinity of the guide plate 25, a metal-made grooved roller 20 is arranged with its peripheral surface in contact with the peripheral surface of the roller 17. Above the grooved roller 20, a plurality (three in the figure) of eccentric bearings 50 are fixed by screws, and each eccentric bearing 50 has a disk-shaped creasing with a sharp peripheral surface. Die rolls 19 (19a to 19c) are rotatably supported. The sheet that has passed between the grooved roller 20 and the creasing die roll 19 is discharged onto the paper discharge unit 24.

The paper feed roller 16, rollers 17, 18
The driving force is transmitted from the motor 23 to the grooved roller 20 via a driving force transmission mechanism (not shown), and the grooved roller 20 rotates in the direction indicated by the arrow in the figure.

FIG. 3 is a side view showing the grooved roller 20 and the creasing die roll 19 in more detail. A plurality of V-shaped grooves 40 are provided on the circumferential surface of the grooved roller 20 so as to extend in the circumferential direction. The position of the groove 40 is set according to the size and folded shape of the sheet. That is,
In the present embodiment, the central groove 40 is formed by the rollers 17 and 20.
For folding the sheet folded in half in the direction perpendicular to the fold line.
Numeral 0 is for further folding the A4 size sheet folded in half into three, and two grooves 40 on the outside are further folded.
Is for further folding the B4 size sheet folded in half into three. Creased die rolls 19a-19
The arrangement position of c can be easily changed by loosening the screw fixing the eccentric bearing 50 and moving the eccentric bearing 50 in the length direction of the shaft 51.

The shaft of the grooved roller 20 is rotatably supported by the side plate 10. The creasing die roll shaft 51 is arranged in parallel with the axis of the grooved roller 20, and is constantly urged toward the axis of the grooved roller 20 by tension springs 55 provided at both ends thereof.

The center of the creasing die roll shaft 51 and the center of the eccentric bearing 50 are shifted by a distance x as shown in FIG. The eccentric direction of the eccentric bearing 50 supporting the creasing die rolls 19a and 19c is the same, and differs from the eccentric direction of the eccentric bearing 50 supporting the creasing roller 19b by 180 °.

Die rolls 19a to 19c for creasing the shaft 51
Shaft swing cams 52 are fixed at positions on both sides of the shaft, and a cam lever 53 is fixed to one swing cam 52. As shown in FIG. 5, the shaft swing cam 52 is formed in a substantially trapezoidal shape such that the bottom side and the sides on both sides form an angle of 135 °. Therefore, the cam lever 53
Stops at one of the three positions shown in FIGS. 5 (a), 5 (b) and 5 (c). When the cam lever 53 is at the position shown in FIG. 5B, the swing cam 52 comes into contact with the reference plate 56. In addition, the cam lever 53 is
When the cam lever 53 is at the position shown in FIGS. 5A and 5C, the shaft 51 is lowered by the distance z (1.0 mm) more than when the cam lever 53 is at the position shown in FIG. A gap is formed between the plate 56 and the plate 56 by a distance y (0.5 mm).

When the cam lever 53 is located at the position shown in FIG. 5 (a), the creasing die rolls 19a and 19c abut the groove bottom of the grooved roller 20 as shown by the solid line in FIG. The die roll 19b is separated from the groove bottom of the grooved roller 20. When the cam lever 53 is located at the position shown in FIG. 5B, the creasing die rolls 19a, 19b, and 19c are all separated from the groove bottom of the grooved roller 20 as shown by a two-dot chain line in FIG. Placed in Further, when the cam lever 53 is located at the position shown in FIG. 5C, the creasing die roll 19b comes into contact with the groove bottom of the grooved roller 20, and the creasing die rolls 19a and 19c The roller 20 is disposed at a position separated from the groove bottom.

Next, the operation of the folding machine according to this embodiment having the above-described configuration will be described.

The uppermost sheet of the sheet bundle placed on the sheet supply table 12 is sent out by the sheet supply roller 16, passes between the sheet supply roller 16 and the leading end of the sheet supply plate 13, and passes through the separation plate 15. And the paper feed roller 16. In this case,
Even if two or more sheets enter between the separation plate 15 and the paper feed roller 16 at the same time, each sheet is separated by the separation action of the separation plate 15 and the paper feed roller 16, and the uppermost sheet is one by one. Feeded sequentially.

The sheet separated between the sheet feeding roller 16 and the separating plate 15 is sandwiched between the rollers 17 and 18 and guided by the guide plate 25, and the idle roller 31 and the flexible thin plate 34 are guided. And enters the slit 35 between them. At this time, when the sheet end contacts the idle roller 31,
Since the idle roller 31 rotates in the moving direction of the sheet, the sheet smoothly advances in the slit 35 with almost no resistance.

When the leading end of the sheet comes into contact with the stopper 32, the sheet bends near the upper end of the guide plate 25, and this bent portion is sandwiched between the rollers 17 and 20. And
As the sheet passes between the rollers 17, 20, the sheet is folded in two. When the sheet is fed along the slit 35, the sheet is
The sheet is conveyed while sliding on the sheet, and curves in an arc shape. For this reason, the apparent strength of the sheet is improved, and the position where the bending of the sheet occurs in the length direction of the sheet is always constant. Therefore, the stopper 32 is moved from the upper end of the guide plate 25 to the stopper 32.
(The distance along the surfaces of the guide plate 25 and the flexible thin plate 34) is set to half of the sheet length.
The sheet can be folded almost exactly at the center in two. Although the groove 40 is provided on the peripheral surface of the roller 20, it has been experimentally demonstrated that a proper fold can be formed in the sheet.

The sheet folded by the rollers 17 and 20 is then turned into a grooved roller 20 and a creasing die roll 19.
And passes between the roller 20 and the creasing die roll 19. At this time, for example, when the cam lever 53 is at the position shown in FIG. 5A and the creasing die rolls 19a and 19c are fitted in the grooves 40 of the grooved roller 20, the sheet is formed by the die rolls 19a and 19c. Are provided with two folding lines along the traveling direction. As a result, the sheet discharged to the paper discharge unit 24 is folded in two at the center as shown in FIG. 6A, and further folded into three, so that it has a folded shape that can be enclosed in a rectangular envelope.

Further, for example, the cam lever 53 is moved as shown in FIG.
If it is in the position shown in FIG.
Since no crease is formed between the rollers 17 and 20,
The sheet folded in half is discharged to the discharge unit 24 as it is. Further, if the cam lever 53 is at the position shown in FIG.
0 is fitted into the groove 40 at the center of the sheet, and the folded shape of the sheet is
The shape (cross-fold) shown in FIG.

In the apparatus of the present embodiment, a sheet is folded in a first direction and a second direction orthogonal to the first direction. The number of folding position determination units and folding rollers provided with the approach path may be small, and the apparatus can be easily miniaturized and the apparatus cost can be reduced. In addition, since the sheet is bent in an arc shape by the idle roller 31 and the flexible thin plate 34 to determine the folding position of the sheet, the variation in the folding position of the sheet is extremely small. By performing the operation, the creasing die roll 19 can be selectively fitted into the groove 40 of the grooved roller 20, and the folded shape can be easily changed.

In the above embodiment, the creasing die roll shaft 51 is a round bar, and the eccentric bearing 50 is fixed to this shaft 51 with screws. However, the creasing die roll shaft is formed of hexagonal material. By making the hole shape of the eccentric bearing hexagonal, it is possible to reliably prevent the eccentric bearing from rotating together with the creasing die roll. In the above-described embodiment, three of the B4 size and A4 size sheets are formed on the grooved roller.
Although the case where the folding groove is provided has been described,
A groove for folding a sheet of other standard size into three may be provided.

[0035]

As described above, in the folding machine according to the present invention, a grooved roller for conveying the sheet folded by the two-folding means in a direction orthogonal to the folding line and a groove of the grooved roller are selected. Since it is provided with a creasing die roll that fits in a proper manner, it is possible to reduce the size and the apparatus cost as compared with a conventional sheet folding machine that folds a sheet in two directions. Further, since the creasing die roll is supported by the eccentric bearing, by rotating the creasing die roll shaft, the creasing die roll selectively fits into the groove of the grooved roll, and the folded shape of the sheet is formed. Can be easily changed.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing a folding machine according to an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a side view showing the grooved roller and the creasing die roll in more detail.

FIG. 4 is a schematic diagram showing a change in the position of a grooved roller due to rotation of a creasing die roll shaft.

FIG. 5 is a schematic diagram showing a state of a cam lever.

FIGS. 6A and 6B are perspective views each showing a folded shape of a sheet.

[Explanation of symbols]

 10; side plate 12; sheet supply table 13; sheet supply plate 14; separation table 15; separation plate 16; sheet supply roller 17; folding roller 19; creasing die roll 20; Paper discharge unit 30; pivot 31; idle roller 32; stopper 34; flexible thin plate 35; slit 36; fixing member 50; eccentric bearing 51; creasing die roll shaft 52; ; Reference plate

Continuation of front page (56) References JP-A-5-338910 (JP, A) JP-A-61-217476 (JP, A) JP-A-57-203647 (JP, A) JP-A-48-63821 (JP) JP-A-59-182165 (JP, A) JP-A 60-16460 (JP, U) JP-A 50-135210 (JP, U) JP-B 36-10913 (JP, B1) 14-7758 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 45/30

Claims (1)

(57) [Claims] 1. A sheet folding means for folding a sheet into two, and a groove extending in a circumferential direction at a predetermined position in a longitudinal direction thereof is provided, and a sheet folded by the sheet folding means is placed on a folding line of the sheet. A grooved roller for conveying in a direction perpendicular to the grooved groove, a scoring die roll shaft arranged in parallel to the axis of the grooved roller, a creasing die roll shaft rotating means for rotating the creasing die roll shaft, and the creasing An eccentric bearing fixed at a position corresponding to the groove of the grooved roller of the die roll shaft, and rotatably supported by the eccentric bearing, selectively rotating the grooved roller by the rotation of the creasing die roll shaft; And a disk-shaped creasing die roll fitted to the paper folding machine.