EP1024099A1 - Device for opening and depositing a folded sheet on a travelling transport device - Google Patents

Abstract

The device's two opening drums have acceleration rollers(29) to pre-accelerate the paper sheet in the horizontal direction, during which the sheet is held on the outer side between two sections rolling against each other. The opening drums each have at least two opening discs which release the sheets after opening, after which the sheets are accelerated in the transporting direction by the acceleration rollers before throwing them off onto the transporting unit.

Description

The invention relates to a device according to the preamble of Claim 1.

From CH-A-617 905 a device has become known with the off-center folded sheet of paper opened and onto one Collection chain can be stored. It shows one continuously rotating take-off drum and two opening drums arranged underneath on which open the bow and onto the transport chain discard. The first opening drum engages an overlap of the sheet and then the second opening drum the other shorter leg of the bow. The bow are opened directly down on the running chain thrown off. The sheets are taken along on the chain by Driver, whereby the sheet accelerates somewhat through the running chain become.

Experience has shown that thin four-sided sheets can be accelerated without pre-acceleration dropped vertically onto a collection chain. At speeds higher than about 16,000 copies per The bows are accelerated by the drivers however, compressed so much that it is no longer reliable can be accelerated. With high-performance machines also the smallest possible difference between the chain pitch, the distance between two subsequent carriers, and the back length of the format to be processed. There is essentially no time available to complete the Accelerate sheets by friction on the running collection chain. With this device there is therefore a further increase in performance especially not possible with thin sheets.

A similar is from the generic CH - A - 493 337 Device known, in which the open sheet on a Put down the sword and accelerate by moving this sword become. In practice, however, the acceleration not proven by such a sword. With static charged bow is also missing here vertically speed component below, which in such Bow is required.

The invention has for its object a device to create the kind mentioned that a further increase in performance enables and yet can be produced inexpensively. The object is achieved with a device according to claim 1.

In the device according to the invention, the sheets are each through the opening drums and before ejecting in a horizontal Accelerated direction. The bows are not like in the Prior art first dropped and then accelerated, but accelerated horizontally on the opening drums before being dropped and thus with a horizontal as well as vertical Provide speed component. The acceleration process immediately follows the opening process and on the opening drums. It is essential that the sheets are left until they leave the opening drums can be run without interruption. The acceleration process is thus the opening process immediately downstream.

The sheets are then preferably removed from the opening drums in horizontal direction accelerates when the lower one is open Side of the sheet already overlaps the transport chain. After The sheets are then immediately handed over from the transport chain taken over and guided by this. Experiments have shown that even very thin sheets with higher performance than before can be processed safely.

A major advantage of the device according to the invention is also seen in the vertical dropping component preserved. This can also cause electrostatic charges Sheets are processed with a predetermined minimum Vertical speed on the transport chain or Must be discarded. With a pre-acceleration this is hardly possible using the sword mentioned.

A particularly cost-effective and reliable implementation the device is then according to a development of the invention guaranteed when accelerating rollers are provided that each arranged obliquely on the shafts of the two opening drums are. With these acceleration rollers, the bow immediately after opening through the opening washers gripped on the outside and in the transport direction of the transport device accelerates. These are preferably acceleration rollers trained as profile rolls. Arches of different thicknesses can then be processed without conversion work if According to a development of the invention, at least one of the inclined acceleration rollers has an elastic pad.

According to a development of the invention, it is provided that at least two driven rollers are provided, each are arranged on an opening roller and the common Gripping and accelerating one arch work together. With this training, the means to accelerate the arch is thus arranged directly on the opening discs. A major advantage of this training is that even very small formats can be processed. If these drums have a shape similar to a beehive, so the sheets become continuous when gripping with these drums increasingly accelerated. The horizontal speed is therefore small at the beginning and maximum at the end.

Further advantageous features result from the dependent ones Claims, the description below and the Drawing.

Fig. 1

schematisch einen Anleger nach dem Stand der Technik,

Fig. 2

schematisch eine räumliche Ansicht einer erfindungsgemässen Vorrichtung,

Fig. 3

einen Schnitt entlang der Linie III-III der Figur 5,

Fig. 4

einen Schnitt entlang der Linie IV-IV der Figur 5,

Fig. 5

einen Schnitt entlang der Linie V-V der Figuren 3 und 4,

Fig. 6

einen Schnitt durch die erfindungsgemässe Vorrichtung entlang der Linie VI-VI der Figur 3 und 4 in anderer Drehlage der Wellen B und C,

Fig. 7

einen Schnitt entlang der Linie VII-VII der Figuren 3 und 4,

Fig. 8

einen Schnitt entlang der Linie VIII-VIII der Figuren 3 und 4 in anderer Drehalge der Wellen B und C,

Fig. 9

einen Schnitt entlang der Linie IX-IX der Figur 10,

Fig. 10

schematisch eine Vorrichtung gemäss einer Variante der Erfindung, und

Fig. 11a und 11b

Ansichten eines Bogens zur Illustration der Klemmbereiche.

Two exemplary embodiments of the invention are explained in more detail below with reference to the drawing. Show it:

Fig. 1

schematically a feeder according to the prior art,

Fig. 2

schematically a spatial view of a device according to the invention,

Fig. 3

4 shows a section along the line III-III of FIG. 5,

Fig. 4

4 shows a section along the line IV-IV in FIG. 5,

Fig. 5

4 shows a section along the line VV of FIGS. 3 and 4,

Fig. 6

4 shows a section through the device according to the invention along the line VI-VI of FIGS. 3 and 4 in a different rotational position of the shafts B and C,

Fig. 7

4 shows a section along the line VII-VII of FIGS. 3 and 4,

Fig. 8

4 shows a section along the line VIII-VIII of FIGS. 3 and 4 in other rotary halves of the shafts B and C,

Fig. 9

4 shows a section along the line IX-IX of FIG. 10,

Fig. 10

schematically a device according to a variant of the invention, and

11a and 11b

Views of an arch to illustrate the clamping areas.

Figure 1 shows a feeder 1 according to the prior art. The eccentrically folded printed products 12, which are arranged on a support 2 as a stack, on a current collection chain 13 stored. This collection chain 13 promotes the sheet 12 perpendicular to the drawing plane of Figure 1. Die auf the transport chain 13 collected sheets 12 are then processed further, for example by means of a not shown here Stapler stapled. However, this is not mandatory.

The feeder 1 has a take-off drum A with which the through Suction cup 4 tilted sheet 12 by means of grippers 5 on the take-off drum A be isolated. The trigger drum can be one or have several grippers 5. The grippers 5 pull the sheets 12 each against format-adjustable stops 6. A cam-controlled Painter 7 passes each sheet 12 individually Opening drums B and C, guide means 8 and 9 these Support transition. The opening drum B holds the sheet 12 in the area of overlap 12a with gripper 10 and pulls the bow 12 each away from the stops 6. The bow then becomes between the opening drums B and C. The gripper 10a grips the overlap. Gripper 10 leaves bow 12 off, so that the latter jumps up and the shorter leg of the sheet 12 by the gripper 11 of the opening drum C can be grasped. The sheet 12 will now be open Side down between the opening drums B and C down transported and dropped on the transport chain 13.

In the following explanation of the embodiments according to the invention the trigger drum A is omitted because it is in itself is known and can also be replaced by another device can which the sheet 12 suitably drums the opening B and C passes.

The device 14 according to the invention according to FIGS. 2 to 8 has opening drums B and C, each with two opening disks 25 and 26 or 23 and 24, with which the bow 12 can be transported individually in a manner known per se.

For the sake of illustration, the machine frame is omitted here only the bearing parts 17 and 18 fixed to the frame and 19 and 20 are shown.

According to FIGS. 2 and 3, the opening drum B has one Shaft 15 on which the two opening disks 25 and 26th are rotatably and parallel to each other. Like the figure 3 shows the grippers 27 in a manner known per se controlled by cams 43, each on a fixed frame Tube 21 are supported. The two-piece tube 21 is rotatably fixed to the machine frame with fastening means 22 and mounted on the shaft 15. The two disc-shaped and spaced-apart orifice plates 25 and 26 are between these two parts of the tube 21 and are rotatably connected to the shaft 15. The wave 15 points to their rotationally fixed connection with a not shown here Drive member on a driving wedge 15a. As can be seen the tube 21 is arranged coaxially to the shaft 15.

On the tube 21 are at a distance from each other and outside of two opening disks 25 and 26 two identical acceleration rollers 29 arranged to the axis of the shaft 15 at an angle α are inclined. This angle α is preferably an acute one Angle and is, for example, about 30 °. The two acceleration rollers 29 are each with a suitable support 31a rotatably supported on the tube 21. On the support 31a there are roller bearings 31. Support 31a determines the Inclination of the acceleration rollers 29.

The two acceleration rollers 29 are with two opposite ones Guide rods 30 with the two opening disks 25 and 26 connected. The acceleration rollers 29 are thus rotated with them when turning the opening disks 25 and 26. To enable this rotation, the two guide rods point 30 each have two balls 32 which are radially displaceable are each stored in a slot 33. The balls 32 are also on the guide rod 30 in the longitudinal direction slidably guided. The two acceleration rollers 29 thus rotate with the shaft 15 and simultaneously with the Opening disks 25 and 26 in the same direction of rotation and with the same Rotation speed. The acceleration rollers 29 are no swash plates and keep the one shown in Figure 2 inclined slope at any time.

The opening drum C differs from the opening drum B essentially through the formation of the two opening disks 23 and 24 and the grippers 34. The structure and the Operation of the gripper 34 is known to the person skilled in the art and need not be explained further here. The control the gripper 34 also takes place via a control cam 35 4, opening drum C also has a shaft 16 on, which are mounted parallel to the shaft 15 on bearing parts 19 and 20 is and on which is also a fixed coaxial Tube 21 is supported. Same as for the opening drum B are on the tube 21 at a distance from each other and outside of Opening disks 23 and 24 two acceleration rollers 29 are arranged. The inclination of these acceleration rollers 29 is the same like that of the opening drum B. The drive is also carried out via two opposite guide rods 30.

The opening disks 23 and 24 work with the opening disks 25 and 26 together in a manner known per se to form sheet 12 can be opened individually and down onto the transport chain 13 discard. The acceleration rollers 29 also work in pairs and serve the sheet 12 in the transport direction to accelerate the transport chain 13. Without these Accelerating rollers 29 would open the sheets 12 vertically and without horizontal speed components on the Transport chain 13 dropped and thus only through the transport chain 13 accelerated in the horizontal direction.

The opening and acceleration of the sheets 12 is described below of Figures 5 to 8 explained in more detail.

In the position of the opening drums B and C is a sheet 12 on the overlap 12a with grippers 27 of the opening drum B and at the end 12b of the shorter arch part Grippers 34 of the opening drum C detected and partially opened. The two opening drums B and C rotate around the shaft 15 or 16 in the direction of arrows 44 and 45 in the opposite direction and transport the sheet 12 with the open side down against the transport chain 13. The sheet 12 is here through surfaces 38 and 39 on the circumference of the opening disks 23 up to 26 clamped on the outside.

In the position shown in Figure 6 has the lower open end of the sheet 12 reaches the transport chain 13, but is by Carriers 13a not yet applied. The bow 12 is in this position by the acceleration rollers 29 and not more held by the opening discs 23 to 26. The Transition from clamping through the opening washers 23 to 26 on the clamping by the acceleration drums 29 at the point labeled 80 where the clamping surfaces 38 of the opening disk 25 and 26 end and essentially without Interruption of the clamping surfaces 42 of the acceleration rollers 29 be replaced. At point 80 is the clamping surface 38 canceled by a recess 37. The digits are 80 diametrically opposite and thus arranged in pairs. Is conceivable but also a version with only one or more than two digits 80 and the corresponding number of grippers 27. The The transition in the clamping takes place in a position in which the bow 12 according to Figure 6 is about half open. On Part of the arch 12 is therefore below the point 80 and another part over position 80.

The effect of the opening washers 23 to 26 on the arch 12 is thus canceled and the sheet 12 is now through the acceleration rollers 29 out. The transition is immediate, so that the arch 12 is therefore always guided at the transition.

The sheet 12 is now transported further by the acceleration rollers 29 according to FIG. 7. The sheet 12 is transported in accordance with the inclination of the acceleration rollers 29. The sheet 12 is transported obliquely downward with respect to the transport direction of the transport chain 13 in accordance with this inclination, and thus in accordance with the angle α. The sheet 12 thus experiences a speed component V ₂ (FIG. 11a) in the transport direction of the transport chain 13. The sheet 12 is inevitably transported obliquely by the acceleration rollers 29 until the collar 12c has left the points of contact of the acceleration rollers 29. The open lower side of the sheet 12 hereby reaches the level of the drivers 13a according to FIGS. 7 and 8. Following the position shown in FIG. 8, the sheet 12 is thrown onto the running transport chain with a speed component directed in the chain running direction and carried along by the drivers 13a. The impact of the drivers 13a on the sheet 12 is reduced by the horizontal component mentioned. As a result of the vertical ejection component mentioned, the inclined acceleration rollers 29 reduce it only slightly.

As a result, electrostatically charged sheets 12 can also be ejected and processed.

If the opening disks 23 to 26 have a diameter of, for example, 205 mm and the acceleration rollers 29 are inclined at an angle α of 30 °, the horizontal speed component V _{2 is} 45% of the speed of the transport chain 13 with a chain pitch of 14 inches (355, 6 mm). This speed component can be increased or decreased by changing the angle α. Basically, an acceleration of up to 100% is possible. As a rule, however, only a pre-acceleration is expedient, so that the sheets 12 are positioned on the transport chain 13 by the carriers 13a and are further accelerated horizontally.

FIG. 11 a shows schematically with dashed lines the area 46 in which the sheets 12 are clamped. In the area 46a which runs vertically to the fold 12c, the clamping takes place by means of the opening disks 23 to 26 and in the area 46b which runs obliquely, the clamping takes place by means of the acceleration rollers 29. Here too it can be seen that the sheets 12 are guided continuously and continuously. The center of gravity of the sheets 12 lies between the two strip-like sections of the area 46. The clamping area 46 thus ensures that the sheets 12 maintain the intended orientation until they are released and released onto the transport chain 13. The horizontal speed vector V ₂ and the vertical speed vector V ₁ result in the speed vector V _R running obliquely downwards and forwards.

In the device 50 according to FIGS. 9 and 10, the Sheet 12 similar to that explained above by opening drums B ' and C 'opened and dropped onto a running transport chain 13. The device that takes the sheets 12 from a stack subtracts is also omitted here. For gripping and opening the Bow 12 also have drums B 'and C' with grippers 56 or 55, which are formed in a known manner.

The opening drums B 'and C' have parallel according to Figure 10 Shafts 51 and 52 on opposite bearing plates 68 are stored on bearings 69. The shafts 51 and 52 are also parallel to the transport chain only indicated here 13.

On the shafts 51 and 52 are spaced apart and parallel two opening disks 53 and 54 arranged to each other and rotatably connected to the shaft 51 or 52. In Figure 10 are the shafts 51 and 52 are driven so that the arc 12 is vertical transported to the drawing sheet from top to bottom and be opened.

To accelerate the sheet 12 in the transport direction of the transport chain 13, the opening disks 53 and 54 each have two diametrically arranged and rotatably mounted drums 59 on. According to FIG. 9, these drums 59 have a beehive-like one Form on and are each mounted on an axis 61, whose axis of rotation is a chord to the circumference of the corresponding Opening roller 53 and 54 forms. Storage on the Waves 56 each take place through two spaced apart Bearings 62 and 63.

The drums 59 are each arranged in a recess 57 so that the outermost meridian line 60a of the drum surface 60 a circular section of the circumferential circle of the opening drum forms. The transition from the lateral surface 53a or 54a to Drum surface 60 is preferably stepless.

The drums 59 are by means of a planetary gear 70 and two parallel drive shafts 66 driven. The planetary gear 70 is supported with a bearing 71 on the shaft 51 and has a sun gear 72 and a planet gear for each shaft 66 74 on. The sun gear 72 is fixed via a rod 73 connected to the end shield 68 shown on the right in FIG. 10. The drive shafts 66 are spaced apart on two Bearing plates 75 mounted fixed to the shaft 51st are connected. Two bevel gears located on each drive shaft 66 67 each mesh with a bevel gear 64, which is fixed with one of the drums 60 is connected. With the shaft rotating 51 are inevitably the drive shafts 66 around the axis of the shaft 51 rotated and simultaneously rotating around its own axis. Corresponding the drums 59 are each rotated about their axis 61. 10 shows the directions of rotation of the drums 59 indicated by arrows 77. The drum 59 of the shaft 52 are is driven the same as that of the shaft 51 in Fig. 10 the corresponding drive device for drawing reasons omitted.

The drums 59 essentially have the function of the acceleration rollers 29 of the device 14 explained above horizontal speed which the drums 59 on the bow 12 exercise, however, are increasing. This follows from the with respect to the axis 61 rotationally symmetrical and beehive-shaped Shape of these drums 59. As FIG. 9 shows, the circumference of the drums 59 changes according to the circumferential lines 60b with increasing distance to the bearing 62. Now there the drums 52 rotate at a constant speed accordingly the peripheral speed with increasing distance to camp 62 steadily.

The sheets 12 are gripped and opened as explained above and then diagonally between opposite drums 59 the transport chain 13 is conveyed to the transport direction and finally dropped on the transport chain 13. The transition from clamping by clamping surfaces 53a and 54a and then the abutting drum surfaces 60a is also here seamless. Since the sheet 12 is first in the area of the bearing 62 the circumferential speed is initially recorded accordingly comparatively small and takes up to that shown in Figure 9 Position steadily. Since in the device 50 the drums 60 arranged directly on the opening discs 53 and 54 are the clamping areas 46 'according to FIG. 11b when accelerating the bow 12 closer together than in the above Contraption. The device 50 is therefore suitable especially for storing comparatively small formats. As the FIG. 11b also shows that the clamping area 46 'runs accordingly the increasing horizontal speed after detection through the drums 59 arcuate.

Claims (23)

Device for opening and depositing a folded Sheet (12) on a running transport device (13), in particular collection chain, with two opening drums (B, C), their axes (15, 16; 51, 52) essentially parallel to Transport direction of the transport device (13) run and each open an arch (12) and with the open side ahead lay down on the transport device (13), the sheet (12) in the direction of transport the transport device (13) is accelerated are characterized in that opening drums (B, C) means (29, 59) for pre-accelerating the arch (12) in horizontal Have direction. Device according to claim 1, characterized in that the bow (12) for their pre-acceleration from the opening drums (B, C) on the outside between two rolling against each other Areas (46) can be taken. Device according to claim 1 or 2, characterized in that that the opening drums each at least two opening disks (53-56; 53, 54), which the bow (12) each release after opening and this from others arranged on the opening drums (B, C) Means (29, 59) recorded and before dropping on the transport device (13) in the Direction of transport can be accelerated. Device according to claim 3, characterized in that that the opening washers (53-56; 53, 54) are interrupted at the circumference in such a way that the sheets (12) each with a certain Grab part of its scope. Device according to claim 3 or 4, characterized in that that the said means (29) Accelerating roles, each diagonally on the shafts (15, 16) of the two opening disks (23-26) are arranged. Device according to claim 5, characterized in that the acceleration rollers (29) are also interrupted in scope. Device according to claim 5 or 6, characterized in that that the acceleration rollers (29) the sheet (12) immediately after their release through the opening washers (23-26) grab and accelerate. Device according to one of claims 5 to 7, characterized in that the acceleration rollers (29) each on a non-rotatable Rack are stored. Device according to one of claims 5 to 8, characterized in that the acceleration rollers (29) by parallel to the axis of rotation guide rods running on the opening drum (B, C) (30) are connected to the drive. Apparatus according to claim 9, characterized in that the acceleration rollers (29) have radially extending guide slots (33), in each of which one on a guide rod (30) arranged ball (32) slidably is led. Device according to one of claims 5 to 10, characterized in that each opening drum (B, C) at least two orifice plates (21-26) which is between at least two Acceleration rollers (29) are arranged. Device according to one of claims 5 to 11, characterized in that the opening washers (21-26) and the acceleration rollers (29) work together in pairs. Device according to one of claims 5 to 12, characterized in that the acceleration rollers (29) on their gripping peripheral surfaces (42) each have an elastic pad with which the to be accelerated Bow. Device according to one of claims 5 to 13, characterized in that the acceleration rollers (29) the sheets to be accelerated (12) grasp the outside and at an angle run down to the fold (12c) of the sheet (12). Device according to one of claims 5 to 14, characterized in that the acceleration rollers (29) only in one drain the upper area near the fold on the outside. Device according to claim 1, characterized in that the said means (59) for Accelerate the bow (12) on the opening discs (53, 54) are arranged. Device according to claim 16, characterized in that that said means (59) at least two driven rollers or drums (59), each on an opening plate (53, 54) are arranged and for gripping and accelerating a bow together (12) work together. Device according to claim 16 or 17, characterized characterized that the two drums (59) have a beehive-like shape. Device according to one of claims 16 to 18, characterized in that the two drums (59) each rotatable on an axis (61) are stored, this axis (61) a chord to the circumference of the opening disc. Device according to one of claims 16 to 19, characterized in that the two drums (59) each in a recess (57) of the Opening disc (53, 54) are arranged and its circumference with a meridian line (60a) Forms an arc that is flush with a leading one Circumferential area of the opening washers (53, 54). Device according to one of claims 16 to 20, characterized in that the perimeter (60b) the drums (59) seen in the running direction steady increases such that the bow (12) each steadily increasing in the direction of the Transport direction (13) can be accelerated. Device according to one of claims 16 to 21, characterized in that on each orifice plate (53, 54) diametrically opposite two drums (59) are arranged. Device according to one of claims 16 to 22, characterized in that the drums (59) each driven by a planetary gear (70) are on the shaft (51, 52) of corresponding opening disc (53, 54) supported is.

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