JP3954172B2 - Method and apparatus for forming transverse folds - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for forming a transverse fold on a material, in particular on an envelope material, with at least one bladed roll and one mating roll.
[0002]
[Prior art]
Generating one or more transverse folds in an envelope material or in a material such as a delivery bag is associated with special difficulties when the material is basically highly inelastic. The crease blades try to push the material into the indentation in the mating tool or in the mating roll or into the indentation created there, but for example paper is not well suited for it. The material does not bend at the time of crease formation, or when the material does not flex, the material changes its position relative to a predetermined position in the machine. Therefore, generally fairly rigid and inelastic materials are usually guided in a way that requires special expenditure, which becomes noticeable in the finished product.
[0003]
In the case of an envelope material, basically, two lateral folds that are separated from each other according to the height of the envelope are required, and each of these lateral folds is generated abruptly. The inaccuracies that appear must then be removed manually by a correction adjustment with a bladed roll after the machine has stopped. For this purpose and in order to eliminate other obstacles, the bladed roll is generally supported in the machine base in a swingable manner. In that case, a bridge structure with a high expenditure is generally used for a bladed roll which can be turned and is basically driven. After the error is removed, re-engagement of the bladed roll drive wheel within the machine drive train again is costly. In particular, in the case of a material having a tip at the side, a big problem arises when running from the apparatus without being guided.
[0004]
[Problems to be solved by the invention]
Then, the subject of this invention is providing the measure which can prevent the said various difficulties.
[0005]
[Means for Solving the Problems]
In order to solve this problem, in the present invention having the features of the features of claim 1, the material is pulled in the transport direction at least during the formation of the lateral fold, and behind the lateral fold in the transport direction. The part of the material at the center is loosely entrained and can move freely for compensating movement during crease formation.
[0006]
Conventionally, when forming a fold, the material is sandwiched on both sides of the roll with a blade and the counterpart tool, and a pushing force acts on the material behind the generated lateral fold in the conveyance direction, The material is now gripped at its front edge or front edge region before forming the transverse fold and is held and guided there during transport.
[0007]
The trailing edge of the material is no longer held and therefore the required compensation movement can be performed when the material has to bend in the direction of the leading edge where the material runs exactly when generating a transverse fold. Therefore, the inherent disadvantageous material properties, such as those possessed by hard inelastic paper, for example, no longer pose manufacturing difficulties, and as a result, the production capacity of the manufacturing machine can be increased compared to the conventional one. .
[0008]
Further, in the apparatus according to the present invention for forming a transverse fold in a material made of an almost inelastic material, the bladed roll has a suction shell, and the suction shell is provided on the peripheral surface side. These suction holes can be connected to negative pressure or suction air. In one development of the invention, the suction holes are grouped together and can be controlled appropriately. At this time, in order to adapt to various sizes, it is desirable that the suction holes on the peripheral surface of the suction shell are grouped in a group parallel to the axis, and can be connected to the suction conduit in each row.
[0009]
In order to control the suction hole, the suction shell has a number of suction passages parallel to the axis, and each suction passage parallel to the axis is further connected to a negative pressure main passage provided in the drive shaft of the bladed roll in the axial direction. Can be connected in a freely selectable manner. For this purpose, in addition to a normal suction air control head provided at one end of the drive shaft, a suction air selection ring is provided (preferably at the center of the bladed roll). On the one hand, this selection ring is assigned to a radial hole provided in the drive shaft and leading to the negative pressure main passage, and on the other hand, an inner circumferential groove and a radial hole are assigned to the suction passage of the suction shell. The method according to the invention can be carried out with the above features.
[0010]
The developments, preferred configurations and advantages obtained according to the invention will become apparent from the dependent claims, the description and the drawings.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail below on the basis of one embodiment shown in the drawings.
An apparatus 1 for forming one or more transverse folds 2 in a blank 3 (FIG. 3) includes a machine base 4 (FIGS. 1 and 2) and at least one prime mover 5 for a bladed roll 6. In particular, a mating tool formed as a mating roll 7 having an elastic jacket is provided attached to the roll with blade. The bladed roll 6 is rotatably supported in the machine base 4 by a drive shaft 8. Further, a turning roll 9 for conveying the material 3 and a turning roll 10 for continuously conveying the material 3 are provided attached to the bladed roll 6. The suction holder 11 is basically controlled in a known manner.
[0012]
The bladed roll 6 has a suction shell 12, and a suction hole 13 is provided on the outer peripheral surface of the suction shell. These suction holes 13 are grouped into groups, and can be appropriately controlled for each group. Therefore, the suction hole 13 that can be controlled by the negative pressure can be adapted to the size of the material 3 to be processed each time.
[0013]
According to the illustrated embodiment, the suction holes 13 of the suction shell 12 are grouped in a group parallel to the axis and can be connected to the suction conduit 14 in each row. For this purpose, the suction shell 12 has a number of suction passages 15 parallel to the axis, and suction holes 13 provided on the peripheral surface side are directly connected to these suction passages on the outer side in the radial direction. Further, each suction passage 15 parallel to the axis can be connected to a negative pressure main passage 16 provided in the drive shaft 8 of the bladed roll 6. For this purpose, a suction air selection ring 17 is useful. In this embodiment, this selection ring is fixed at approximately the center of the bladed roll 6 (FIG. 2), for example by means of screws 18, and is connected to the individual suction passages 15. Ensure proper supply of negative pressure.
[0014]
For this purpose, the suction air selection ring 17 is directed to the inner peripheral surface groove 19 over a part of the peripheral surface thereof and radially outward therefrom, and is attached to the suction passage 15 of the suction shell 12 in the radial direction. Hole 20. By displacing the adjustable suction air selection ring 17, it becomes possible to connect the suction passages 15 shown in FIG. 3 to the negative pressure in the negative pressure main passage 16, respectively. A directional hole 21 communicates from the negative pressure main passage 16 to the inner peripheral surface groove 19. Finally, the position, shape and design of the inner circumferential groove 19 are selected so that each suction passage 15 in the suction shell 12 can be reached by the displacement of the suction air selection ring 17.
[0015]
In the same way that the suction shell 12 has the suction holes 13 facing radially outward from each suction passage 15, a radially inward connection hole 22 is provided in each suction passage 15, and the radius of the suction air selection ring 17 is Assigned to the directional hole 20. The connection holes 22 of all the suction passages 15 that are not connected to the radial holes 20 of the suction air selection ring 17 are connected to the atmospheric pressure, and the suction passages 15 themselves and those suction holes 13 are at atmospheric pressure. Yes.
[0016]
Generation of the required negative pressure in the negative pressure main passage 16 in the drive shaft 8 is effected by the suction air control head 25 in a known manner. The drive shaft 8 carries a control disc 26 whose negative pressure main passage 16 extends into the control head 25 and is non-rotatably coupled to one another. The control disk 26 has a radial hole 27 and a window 28 connected to the hole 27 and facing the axial direction. There is also a window 29 in the control head 25 at a position facing this window 28, to which the suction conduit 14 is connected.
[0017]
When the material 3 is taken up by the turning roll 9 through the suction passage 15 and then transported while being held by the suction air of the bladed roll 6 until it is delivered to the turning roll 10, the negative pressure main passage 16 and accordingly. The front side window 29 facing the control disk 26 extends in an arcuate manner in an adjusted manner together with the window 28 so that one of the suction passages 15 has a negative pressure. According to FIG. 1, this is an angle slightly exceeding 180 °, in which case the axis of the bladed roll 6 is lower than the axis of the turning roll 10 that is continuously conveyed. The axis of the other turning roll 9 is slightly higher than the axis of the turning roll 10.
[0018]
The suction shell 12 is fixed and supported on the drive shaft 8 by a support ring 30. These support rings are respectively axially outward according to FIG. The suction shell 12 is fixed to the peripheral surface of the support ring 30 with a screw 31. Desirably, the support ring 30 is divided for adjustment (FIG. 5) and can be fixed to the drive shaft 8 by a clamping screw 32 in a frictional engagement manner.
[0019]
In order to generate the crease 2, according to the present embodiment, two crease blades 33 and 34 are provided. The crease blades are respectively on the outer surface of the suction shell 12 and on the peripheral surface of the bladed roll 6 (FIG. 3). Therefore, the suction shell 12 is also extended over only a part of the peripheral surface of the bladed roll 6 over about 120 ° according to the present embodiment. There are crease blades 33 and 34 in the remaining half of the bladed roll 6. Therefore, the suction shell 12 is not loaded by the force resulting from the crease blade 33 or 34.
[0020]
One crease cutter 33 is a cutter fixedly adjusted to the bladed roll 6. The other crease cutter 34 can be displaced relative to the crease cutter 33 in the circumferential direction.
Various support rings 36, 37, 38, 39 serve as a support for the fixedly adjusted fold tool 33. These support rings are arranged on the drive shaft 8 in a mirror image manner with respect to the suction air selection ring 17, where they are fixed in the axial and circumferential directions by screws 40. Both support rings 36 mounted on the outside in the axial direction have a circular peripheral surface as shown in FIG. 6 and at the same time serve as a drive for the counter roll 7, whereas the support rings 37, 38, 39 are shown in FIG. They have essentially the same cross section as the support ring 38 shown, but their outer contour is different from a full circle.
[0021]
Only the crease blade 33 that cannot be adjusted in the circumferential direction of the bladed roll 6 is located in the projection 43 of the airfoil cross section having a circular outer contour by the fastening band plate 41 and the fixing screw 42. This airfoil protrusion extends over approximately 90 °.
[0022]
The support ring 38 and the remaining part 44 of the support rings 37, 39 have an annular outer contour 45, which is gradually projected at the location of the fastening strip 41 and with a right-angle step 46 at the other end. 43 has shifted to the outer contour 47 of the head.
[0023]
The annular portion 44 of the support rings 38, 37, 39 is reduced in its outer diameter by the height of the step 46 to help form the free space 48, and the adjustable fold blade 34 is adjustable in this free space. is there. Further, as is apparent from FIG. 3, the suction shell 12 is also in this free space 48.
[0024]
The fixing of the adjustable fold blade 34 on the drive shaft 8 is effected by support rings 50, 51 which are also arranged apart from each other and mirror-imaged with respect to the suction air selection ring 17.
[0025]
The support rings 50 and 51 are grooved like the support ring 30, can be adjusted in the circumferential direction on the drive shaft 8, and can be fixed by a fastening screw 52. The support rings 50, 51 have the same outer diameter as the support rings 37, 38, 39 over most of their peripheral surfaces. This also applies to the protrusions 53 and 54 on both sides of the groove 55.
[0026]
The protrusion 54 carries a fastening band plate 57 for the fold blade 34 that can be fixed by a screw 57 '. From the seat of the fastening band plate 57, the protrusion 54 falls directly into the small outer peripheral surface 58 of the support rings 50, 51.
[0027]
According to FIGS. 1 and 2, the bladed roll 6 is driven and supported rotatably in the machine base 4, whereas the counterpart roll 7 is on the other hand a bladed roll as shown in FIG. The position can be fixed relative to 6 and can be turned on the other hand. Furthermore, the counter roll 7 is adjustable, and at least one screw 60 or screw bolt serves for this purpose.
[0028]
The counterpart roll 7 is supported by the machine base 4 so as to be swingable around the shaft 62 together with the bearing base 61. If necessary, the opposing roll can be rotated downward in the direction of the arrow (FIG. 1) to leave the bladed roll 6.
[0029]
As the various figures clearly show, the device 1 is suitable for carrying out the work process sought. In other words, the workpiece 3 is taken up by the turning roll 9 as shown in FIG. 1 by the suction air of the suction hole 13 of any one suction passage 15 and then moved in the direction of the arrow in FIG. The fold 2 is obtained when the adjusted crease blade 33 passes over the counterpart roll 7. The portion 70 of the material 3 behind the transverse fold 2 in the conveying direction is loosely entrained at the time of formation of the fold 2 and can be compensated by this portion 70 during the formation of the fold. This also applies to the rear end 71 of the material 3 in the transport direction.
[0030]
Finally, it is self-evident that each material 3 must be gripped in the area of its leading edge 72 (FIG. 1) by negative pressure or suction air, continuously conveyed and guided. In the case of an envelope, the edge of the back cover is preferably gripped. The illustrated apparatus 1 also reproduces such a case.
[0031]
Finally, the present invention is not limited to the illustrated embodiments, but rather variations are possible without departing from the basic idea of the invention.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view of a main part of the apparatus.
FIG. 2 is a longitudinal sectional view of a roll with a blade.
3 is a cross-sectional view taken along line III-III in FIG.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is a view taken along line VV in FIG. 2;
6 is a view taken along line VI-VI in FIG.
7 is a view taken along line VII-VII in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lateral crease forming apparatus 2 Lateral crease 3 Material 4 Machine base 6 Roll with blade 7 Counter roll 8 Drive shaft 9, 10 Turning roll 11 Suction holder 12 Suction shell 13 Suction hole 14 Suction conduit 15 Suction passage 16 Negative pressure Main passage 17 Suction air selection ring 18 Screw 19 Inner circumferential groove 20 Radial hole 22 Connection hole 25 Suction air control head 26 Control disk 27 Radial holes 28, 29 Window 30 Support ring 31 Screw 32 Tightening screws 33, 34 Folding blade 36, 37, 38, 39 Support ring 40 Screw 41 Tightening strip 42 Fastening screw 43 Projection 44 Remaining portion 45 Circular outer contour 46 Right angle step 47 Outer contour 48 Free space 50, 51 Support ring 52 Tightening Screws 53 and 54 Projection 55 Groove 57 Fastening band plate 58 Outer peripheral surface 60 Screw 70 part

Claims (7)

With a blade that generates a raised lateral fold (2), is equipped with a crease cutter (33), is mounted on a machine base (4), and is mounted on a drive shaft (8) of a prime mover (5) A raised horizontal direction extending in a direction transverse to the conveying direction of the material on the material cut in advance by the roll (6) which is a roll (6) and is associated with the counterpart roll (7) An apparatus for generating a fold (2), wherein the material (3) is grasped by suction at a point in front of the transverse fold (2) to be formed, as viewed from the conveying direction of the material; and The portion (70) of the material that is pulled along the material conveyance direction and is behind the lateral fold (2) when viewed from the material conveyance direction is formed by the horizontal fold ( 2) In a free state without restraint so as to be able to move toward the crease blade (33) with the formation of In the apparatus so as to be arranged along the circumferential surface of the biasing roll (6),
(A) The suction shell (12) provided in the bladed roll (6) is provided with a plurality of suction holes (13) arranged along the circumferential direction,
(B) The plurality of suction holes (13) are arranged together in parallel groups,
(C) each of the groups is configured to be selectively connectable to the suction conduit (14) in each row;
(D) The roll with blade (6) is provided with two crease blades (33, 34),
(E) One fold blade (33) is fixed at a position along the circumferential direction,
(F) The other crease blade (34) is configured to be adjustable along the circumferential direction ,
(G) The suction shell (12) and the crease blade (33, 34) are arranged on a support ring (30, 36 to 39, 50, 51) attached to the drive shaft (8) of the bladed roll (6). What
A device characterized by.   2. Device according to claim 1, characterized in that the suction shell (12) is adjustable in the circumferential direction on the drive shaft (8) for the bladed roll (6). The suction shell (12) has a plurality of parallel suction passages (15), each of these suction passages (15) having a suction hole (13) directed towards the periphery, and each of the suction passages (15). 2. A device according to claim 1, characterized in that the suction passage (15) is connected to a negative pressure main passage (16) provided in the drive shaft (8) of the bladed roll (6). The counterpart roll (7) can fix the position with respect to the bladed roll (6), and can adjust the position with respect to the bladed roll (6) by swinging. Item 2. The apparatus according to Item 1.   Device according to claim 1, characterized in that the counter roll (7) is driven by a bladed roll (6).   A suction air selection ring (17) is provided, while an inner circumferential groove (19) of the selection ring communicates with a radial hole (21) of the drive shaft (8) communicating with the negative pressure main passage (16), 2. The device according to claim 1, wherein on the other hand the inner circumferential groove (19) and the radial hole (20) of the selection ring communicate with the suction passage (15) of the suction shell (12).   2. A device according to claim 1, characterized in that the peripheral surface of the counter roll (7) is formed by an elastic jacket.

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