EP0476718B2 - Wire-stitching device for printed products with several parts - Google Patents

Abstract

The signature assembling machine has saddle-shaped supports (14), travelling round a closed track and extending at right angles to the direction of rotation (U), over which the signatures (20) are placed at spaced feed stations. One station is followed by another one with stapling heads (28) travelling in synchronism with the supports during the stapling operation on the signatures straddling the holders. The staples are formed from straight wire lengths (28), with teh signatures discharged after stapling. The stapling heads travel round a closed track (26) and past a dispenser (30) for the wire lengths and at the same speed as the supports. A part (D) of this track coincides with that for the supports.

Description

The present invention relates to a device for Wire stitching of multi-part folded printed matter according to the preamble of claim 1.

Such a device is known from DE-A-36 16 566. This points parallel to a common axis of rotation running, saddle-shaped supports rotating around this. On these pads lie the one on top of the other Printed sheet formed multi-part printed products. The latter are marked by these cushions with their fold line perpendicular to the direction of circulation of the supports conveyed through a stitching area. In this tack area is a stapler arranged, which a number of stapling heads for Set the wire clips. The stitching heads are in the Distance between the parallel runs on one bracket pivotable about the axis of rotation of the supports arranged. The stirrup is swung around by means of a swivel drive moved here, the stitching heads each during the temporal short synchronization with the editions at the same time one Brackets in the resting on the pads Put printed products. Regarding the structure of the stitching heads itself is in DE-A-36 16 566 on CH-A-549 443 referenced, which can be inferred from each stitching head one wire each is fed, of which by means of a Stapling head arranged separator each Wire section is separated. This wire section will by means of a slide-mounted stamp around a die a clamp bent, which can also be pushed by means of a stored plunger pressed out of the stamp into the Printed products used and then through in the Requirements arranged bender is closed.

The swivel drive designed as a sliding crank gear for Has stapling heads especially at high processing speeds great acceleration and deceleration forces to apply. The rotating pads and oscillating stitch heads meet in every work cycle - kinematically-only especially during a short movement path in synchronism, during which the brackets must be placed.

Another disadvantage of the wire stitching device according to DE-A-36 16 566 results from the fact that each stitching head has one own wire feed and separating device for separating Has wire sections.

DE-A-32 03 376 describes a stapling device at of the products to be stapled between each interacting Clamp setting elements and clamp bending elements be passed through. The clamp setting elements and the Bracket bending elements are each on an endless, all-round driven chain attached, one strand parallel to the Direction of movement of products and adjacent to Trajectory of the latter runs. The clamp setting elements and the latter facing each other during the stapling process Clamp bending elements run synchronously with the stapling Products with.

Another round run is required to form the brackets provided by by an endless, revolving driven chain attached patrices is formed. At the The orbit of these patrices is a wire section donor arranged, the one on the passing patrix gives off a straight piece of wire. The latter will be at the meeting a male with one acting as a female Bracket setting element bent into a U-shaped bracket, which is from Stapling element transported to the stitching area and in there a product is indented.

This stapling device is relatively complex Construction, three round trips are necessary, namely one for the patrices feeding the straight pieces of wire, one for the cooperating with the latter to form the brackets Clamp setting elements and one for the clamp bending elements. In addition, the brackets are used along an in Direction of movement of the products set.

US-A-4,792,077 is now a simplified version of the Device described above, in which only two more chain runs are provided. The chains of the Round trips are guided over deflection wheels and lie with each other opposite a section lying between the deflection wheels. The chain of a chain run runs on one Wire section dispenser over, with certain chain links straight wire sections are passed that are in Extend the direction of rotation of the chain. The ones to be stapled Products are conveyed to the two by means of a feeder Chain runs fed and between the two themselves opposite sections of the two chain circuits introduced. The products are then transported further by clamping between the limbs of the two Chain runs, with the products also folded become. The chain circuits thus take over Multiple task of folding, setting wire clips and forward transport.

Since the products to be stapled with their fold line in their Direction of conveyance running through the chain circuits are transported further, the Wire clips along these fold lines in the longitudinal direction of the Products. If a product is provided with two brackets, so the wire clips for a product are thus set one after the other.

The present invention is based on the object of a device for wire-stitching multi-part To create printed products that are simple and reliable Allows stapling of the products.

This object is achieved according to the invention by the features in the characterizing part of claim 1 solved. Preferred embodiments of the invention are defined in the dependent claims.

Figur 1

eine Sammeltrommel mit einer Heftstation, deren Heftköpfe entlang einer um die Sammeltrommel herumführenden Bewegungsbahn umlaufen,

Figur 2

diesselbe Sammeltrommel wie in Fig. 1, wobei aber die Heftköpfe entlang einer nieren förmigen Bewegungsbahn umlaufen,

Figur 3

eine Sammeleinrichtung mit langgestreckter Umlaufbahn für die Auflagen und ebenfalls langgestreckter Bewegungsbahn für die Heftköpfe,

Figur 4

eine weitere Ausbildungsform der Einrichtung gemäss Fig. 1,

Figur 5

in vergrösserter Darstellung einen Schnitt entlang der Linie Vl-VI der Fig. 4,

Figuren 6 und 7

in Ansicht bzw. Draufsicht einen Heftkopf,

Figur 8

einen Schnitt entlang der Linie IX-IX der Fig. 7,

Figuren 9 bis 14

eine vereinfachte Darstellung des Heftkopfes bei verschiedenen Phasen eines Arbeitszyklus,

Figuren 15 und 16

in Ansicht bzw. Seitenansicht einen Drahtabschnittspender und

Figuren 17 bis 23

in vergrösserter Darstellung Teile der Einrichtung gemäss Fig. 4 in verschiedenen Phasen eines Umlaufs.

The invention will now be explained in more detail with reference to the drawing. It shows purely schematically:

Figure 1

a collecting drum with a stapling station, the stapling heads of which run around a movement path leading around the collecting drum,

Figure 2

the same collecting drum as in Fig. 1, but with the stitching heads running along a kidney-shaped trajectory,

Figure 3

a collecting device with an elongated orbit for the supports and also an elongated movement path for the stitching heads,

Figure 4

another form of training of the facility according to FIG. 1,

Figure 5

4 shows an enlarged view of a section along the line VI-VI of FIG. 4,

Figures 6 and 7

a stitching head in view or plan view,

Figure 8

7 shows a section along the line IX-IX of FIG. 7,

Figures 9 to 14

a simplified representation of the stitching head at different phases of a work cycle,

Figures 15 and 16

in view or side view of a wire section dispenser and

Figures 17 to 23

4, in different phases of a cycle.

FIG. 1 shows a collecting drum 10 as described in detail in the subsequently published EP-A-0 341 425 is. This collecting drum 10 is arranged around a common rotation axis 12 in Saddle-shaped supports 14 running in the direction of the rotational axis 12 and driven in the rotational direction U on. In the area between each two adjacent supports 14, one in the direction of the axis of rotation 12 is and movable carriage 16 with a controllable clamping arrangement 18 for astride the supports 14 stored folded printed sheet 20 provided.

A stapling station 22 has a stapling head arrangement 24 along a coaxial around the collecting drum 10 around running trajectory 26 stapling heads 28 arranged one behind the other. Each edition 14th is assigned a stitching head 28, which is thus arranged essentially at the same mutual distance A. are like the editions 14.

Outside the movement path 26, a wire section dispenser, designated 30, is provided, on which the trajectory 26 passes. This wire section dispenser 30 has a cutting device 32 by means of which wire sections 38 are separated from a wire 36 drawn off from a supply roll 34 become. The cutting device 32 is followed by a cutting device 32 with wire sections 38 fed magazine 40. A conveyor wheel 42 driven in the direction of rotation V pulls along with it Circumferentially distributed holding members 44 each from the magazine 40 from a wire section 38 and promotes these to the stitching heads 28.

The device shown in FIG. 1 operates as follows: seen in the conveying direction of the carriage 16 Upstream of the stapling station 22 are feeding stations for printed sheets in a known manner. These feed stations place a folded printed sheet 20 on each passing in the circumferential direction U at the feed station Edition 14 astride. Before each edition 14 in the lower area of their circular movement path arrives, the relevant clamping arrangement 18 for holding the corresponding Carriage 16 reaching parts of the printed sheets 20 clamped. In the course of going through the lower Half of the path of movement of the supports 14 make the carriage 16 a working stroke in the longitudinal direction of the circumferential axis 12 to the next feed station or stapling station 22. When leaving the lower half of the movement path of the supports 14, the relevant clamping arrangement 18 is released again, so that the printed sheets 20 in the upper region of the orbit of the supports 14 in the direction of the axis of rotation 12 no movement Experienced. In this area of the movement path, the carriages 16 make with the clamping arrangement 18 open a return stroke.

The stitching heads 28 are also driven in the direction of rotation U in synchronism with the supports 14. When walking past a stapling head 28 on the feed wheel 42 takes over a wire section 38 from the feed wheel 42. In a region designated by B, viewed in the direction of rotation U, following the wire section dispenser 30, the wire section 38 now held by the stitching head 28 is formed into a clamp, as is shown below still to be described in detail. In a subsequent area of the movement path designated by C. 26, the clip is seen from the radial side of the outside of the stitching heads 28 brought to the inner side facing the supports 14. In one in the top half of the orbit the supports 14 located area D of the path of movement 26 of the stitching heads 28, in which the Printing sheets 20 do not move in the direction of the axis of rotation 12, the relevant stitching heads 28 lowered onto the printed sheets 20 placed one above the other on the supports 14 and the clamps inserted in the printed sheets. The distance A of the stitching heads 28 corresponds to the distance between the pads 14. After setting the staples, the stitching heads 28 are raised again, after which the collected ones and stapled sheets 20 in the course of the next rotation of the collecting drum 10 in the direction of Orbital axis 12 can be fed to a removal station.

The collecting drum 10 shown in Figure 2 corresponds to that of Figure 1 and is therefore not described in more detail. 2, the path of movement 26 for the stitching heads 28 is kidney-shaped formed and runs in an area D along the orbit of the supports 14 of the collecting drum 10. The collecting drum 10 is outside the path of movement 26 and that which is only indicated schematically Wire section dispenser 30 arranged within this. The collecting drum 10 runs counterclockwise U um and the stitching heads 28 are in the opposite direction U 'at the same speed as that of Pads 14 driven. The distance A of the stitching heads 28 again corresponds when the staples are set the distance between the pads 14, so that in area D for setting the brackets one with each pad corresponding stitching head 28 runs along.

The embodiment of the device for collecting folded printed sheets shown in FIG. 3 20 has a collecting conveyor 46, as described in the subsequently published EP-A-0 346 578 or the like Structure is described in EP-PS 0 095 603 and the corresponding US-PS 4,489,930. This instructs by two spaced apart axes of rotation 48, indicated only with their essentially horizontal axes of rotation Deflection wheels around guided tension element 50, on which at certain intervals one behind the other, Pads 14 running parallel to one another and at right angles to the direction of rotation U are arranged. The stapling station 22 has a stapling head arrangement 24 arranged above the collecting conveyor 46 with a elongated movement path 26 for the stitching heads 28. The stitching heads 28 are on one, not shown Traction element with the same distances A as the pads 14 arranged in the area D. The tension member is driven in the direction U 'at the same speed as the pulling element 50 in the direction U. The stitching heads 28 thus run in the area D synchronously with the supports 14 and move in each case from the area D. removed wire section dispenser 30 past. In a known manner, seen in the direction of the arrow U, the Stapling station 22 along the upper run of the collecting conveyor 46 feeding stations for laying folded Printing sheet 20 upstream of the pads 14. Of course, the stapling station 22 is a guide station downstream for the stapled printed sheets 20.

The stapling stations 22 shown in FIGS. 2 and 3 function as follows: each stapling head 28 takes over each when passing the wire section dispenser 30 of this one wire section. In the course of Orbital movement in the direction of arrow U 'along the movement path 26 is in the area between the Wire section dispenser 30 and the area D (clip setting area) from the wire section a clip bent and placed on the outside of the stitching heads 28 with respect to the movement path 26. In area D, the stitching heads 28 come onto the relevant supports 14 or those placed thereon Press sheet 20 to the plant and put the clip in the sheet 20.

2 and 3, it is also conceivable to dispense the wire section dispenser outside to arrange the trajectory 26. Of course, in this case the wire section or the Clamp on the side of the stitching head that is outside of the path of movement.

A form of training of the facility according to FIG. 1 is now explained in more detail below. The in the Figure 4 and 5 shown stapling station 22 has two stapling head arrangements arranged on the same holding arrangement 52 24 on. The holding arrangement 52 is annular and coaxially engages around the Revolving axis 12 in the revolving direction U driven collecting drum 10. The holding arrangement 52 has two in Holding rings 54 spaced apart from one another in the direction of the circumferential axis 12 and cage-like via grid bars 56 are interconnected. The retaining rings 54 are each arranged approximately on three on a frame 58 bearing rollers 60, each equally spaced apart, are freely rotatable.

Each pad 14 is assigned a stitching head 28 from each stitching head arrangement 24, which is on a common one Support profile 62 are attached spaced apart in the direction of the axis of rotation 12 (Figure 5). A C-shaped mounting part 64 is attached to the support profile 62 at both ends, which with its free end regions 64 'is each guided on a bearing shaft 66 in the radial direction E slidably. The stock shaft is 66 arranged on a likewise C-shaped holding part 68 fastened to the respective holding ring 54, the in 5 the end portion 64 'of the mounting part 64 shown above is gripped by the holding part 68. To the stock 66 around a compression spring 70 is guided, seen in the direction E on the inside of the holding part 68 and supported on the outside of the bearing part 64. The compression springs 70 thus hold the stitching heads 28 in one, in the figure 5 rest position, not shown, in which the stitching heads 28 are lifted from the supports 14 and in which the bearing parts 64 are in contact with the holding parts 68.

The bearing parts 64 each have one in the radial direction over the relevant holding part 68 to the outside protruding arm 72, on each of which a follower roller 74 is freely rotatably mounted. Above the The collecting drum 10 is fastened to the frame 58 by a pair of lowering blocks 76 acting on these follow rollers 74.

In the area of the pair of lowering sets 76, each stitching head arrangement 24 is further assigned to the frame 58 Ram slide 78 attached, this in an area in which the stitching heads 28 in their 5 shown, act on plunger 80 of the stitching heads 28.

There is a driver 82 in the radial direction on each of the holding parts 68 fastened to the holding ring 54 slidably mounted. The driver 82 has an essentially at its end facing the support 14 V-shaped driver profile 84 and at its opposite end a freely rotatable follower roller 86 on. Another compression spring 88 engages around the driver 82 and is supported in the radial direction seen on the inside on the holding part 68 and on the outside on a ring 90 fastened to the driver 82. Means one arranged on the frame 58 and on the follower rollers 86 approximately over the upper half of the movement path 26 of the stapling heads 28 acting driver control link 92 is the respective driver profile 84 from a rest position, not shown in FIG. 5, in which the driver profile 84 on the holding part 68 is present, counter to the force of the further compression spring 88 in a driving position shown in Figure 5 lowerable, in which the V-shaped driver profile 84 engages around the saddle-shaped support 14.

Seen in the direction of rotation U, following the end of the pair of lowering sets 76, one (in Figure 5 indicated dash-dotted lines) acting on the clamping lever 94 of the stitching heads 28 release gate 96. Following the Drant section dispenser 30 indicated by an arrow, there are further on the frame 58 link-shaped die 98 acting on the wire sections 38 and one on an actuating shaft 100 of the stitching heads 28 acting swivel link 102 (see Fig. 4).

In Figure 3, the pad 14 is shown partially cut away. On the edition 14 are one above the other applied printed sheets 20, being cut open at those located under the stitching heads 28 illustrated printed sheets 20 which are shown in these brackets 104.

Inside the support 14, a coupling 106 is parallel to two pivotally mounted on the support 14 pivoting levers 108 running relative to one another in the manner of a parallel crank drive are pivotably mounted. The in The swivel lever 108 shown on the left in FIG. 5 is coupled to a control lever 110 which, by means of a Control arrangement, not shown, can be moved back and forth in the longitudinal direction of the support 14. This Aufund Moving the control lever 110 has a back and forth movement of the coupling 106 in the radial direction E. result. In the area of the stitching heads 28, slots 112 are made in the coupling 106, which only fit one act schematically indicated bending ram 114 in the direction of arrow E.

For a better understanding of the operation of the device shown in Figures 4 and 5 The stapling heads 28 are first described in more detail below with reference to FIGS. 6 to 8. On the side Flanks 116 of a substantially U-shaped support part 118 is a shaft 120, the one indicated by dash-dotted lines Swivel axis 122 parallel to the longitudinal direction of the support profile 62 (see FIG. 5) and thus parallel to The axis of rotation 12 of the collecting drum 10 runs freely rotatably. In the area between the two side Flanks 116 sit on the shaft 120 two spaced sleeves 124, which by means of pins 126 are connected in a rotationally fixed manner to the shaft 120 and on which stamp arms running parallel to one another 128 of a stamp 130 are attached. The two punch arms 128 are by means of a lateral web 132 connected with each other. In the free end area, the two punch arms 128 have an opposing, slight thickening 134, in which grooves which run in the radial direction and are open to one another 136 are provided. These grooves 136 are also at the free end of the punch 130 in the radial direction open. Each punch arm 128 has at its free end, adjacent to the groove 136, one in the radial direction protruding driver lug 138 and a permanent magnet 140 arranged in the punch arm 128. FIGS. 6 and 7 show one of the driver lugs 138 and one of the permanent magnets 140 held wire section 38 shown. In Figures 6 and 7, the stamp 130 is in its rest position and 8 in the clamp setting position 130 '.

A spacer sleeve 142 sits on each sleeve 124 in the region of the pin 126 and is a pivot lever 144 between the spacer sleeve 142 and the relevant punch arm 128 freely rotatably mounted. At the free End regions of the pivot lever 144 is a substantially connecting the two pivot levers 144 to one another Clamp retaining member 146 formed in the form of an annular segment. On the clip retaining link 146 are two grooves 148 spaced apart from one another, into which grooves when the stamp is pivoted 130 engage the free end areas of the punch arms 128. One swivel lever 144 acts with one counterclockwise force a leaf spring assembly 150 attached to the support member 118 and presses the swivel lever 144 with the stops 152 formed on them against the supporting part 118 the pivot lever 144 protrudes counterclockwise, the clip holding member 146 has a clip guide tab 154 on. This clip guide lug 154 is wedge-shaped and has a radial one Seen in the direction towards the wedge surface designated 154 '.

The plunger 80 is guided on the support part 118 so as to be displaceable in the arrow direction F. This direction of displacement F runs parallel to the grooves 136 in the plunger arms 128 when in the clamp-setting position 130 ' Stamp 130. The plunger 80 has a plunger head 158 at its lower end region, which in itself Clamp setting position 130 'located punch 130 engages between the two punch arms 128. At the Ram head 158 are integrally formed laterally protruding guide wedges 160 which when the ram is moved 80 in the direction F from its rest position shown in FIG. 6 into the ejection position shown in FIG the punch 130 located in the clamp setting position 130 'enter the grooves 136. At its bottom At the end, the plunger head 158 has a pushing groove 162 for ejecting it with its lateral arms 104 'into the Grooves 136 performed on bracket 104. The plunger 80 also has an open towards the support member 118 groove-shaped recess 164 in which a compression spring 166 is arranged, which is located on the top Tappet 80 and at the bottom on a fastened to the support member 118, which extends into the groove-shaped recess 164 Bolt 168 supports (Figure 8). The compression spring 166 keeps the plunger 80 in place in FIG solid lines and the rest position indicated by dash-dotted lines in FIG. 8.

The side flanks 116 face at the lower end opposite the one in the clamp setting position 130 ' Stamp 130 protruding pressing tabs 170 through a substantially V-shaped recess 170 'are separated from each other. When the stitching head 28 is lowered, it comes with the pressing noses 170 on the edition 14 or on the printed sheet 20 on the system.

The support part 118 is also in a bearing arrangement 172 fastened to the support profile 62 (cf. also FIG. 5) Slidably mounted in the direction of arrow F. The support part 118 also has groove-shaped ends Recesses 174 on (Figures 6 and 7), in each of which a bore 176 with a thread from below 176 'opens. Further bolts 178 are arranged on the bearing arrangement 172, which extend into the groove-shaped recesses 174 engage and on which another compression spring 180 is supported at the top. At the bottom, this compression spring 180 presses against a screw 182 inserted into the thread 176 ' the compression spring 180 thus becomes the supporting part 118 with respect to the bearing arrangement 172 in that shown in FIG. 6 Lower rest position held at which the support member 118 is supported on the bolt 178. When lowering the support profile 162 (cf. FIG. 5), through the action of the pair of lowering blocks 76 on the follow rollers 74, the supporting part comes 118 with the pressing lugs 170 on the support 14 or on the printed sheet 20 placed thereon for contact. The different position of the lowered stitching head due to different thickness of printed sheets 20 28 with respect to the support 14 is now always on by moving the supporting part 118 with respect to the the same amount of lowered support profile 62 (and bearing assembly 172) added.

A drive arrangement is located on one side flank 116 of the supporting part 118, which is shown at the bottom in FIG 184 attached for pivoting the shaft 120. This has a guide member 185 on which the actuating shaft 100 is also mounted displaceably in the direction of arrow F. At the lower end is formed on the actuating shaft 100, a rack 186, which with a seat on the shaft 120 rotatably Pinion 190 combs. In a downwardly open bore 192 in the actuating shaft 100 is another Compression spring 194 arranged on the top of the operating shaft 100 and below on one on the guide member 185 attached pin 196 supports. The pin 196 penetrates a slot-shaped passage 198 in the operating shaft 100. The upper end region of the operating shaft 100 is of a cap-shaped Sliding shoe 200 covers, which is displaceable in the longitudinal direction with respect to the actuating shaft 100 and by means of a further pin 196 'fastened to the actuating shaft 100, which pin 200 in one also penetrates slot-shaped passage 198 'is held. In a hole open towards the top 192 'in the actuating shaft 100, a further compression spring 194' is used, which is on the sliding shoe 200 and supported on the operating shaft 100. If the operating shaft 100 is in its lower, shown in Figure 8 End position and the swivel link 102 approaches the support member 118, takes the Compression spring 194 'this approach.

On the guide member 185, the clamping lever 94 is pivotally mounted, which is from the operating shaft 100 is permeated. The corresponding hole in the clamping lever 94 has only a slightly larger diameter than the thickness of the operating shaft 100. The clamping lever 94 is by means of a compression spring 204 kept biased counterclockwise. Holds in the position of the clamping lever 94 shown in Figure 6 the actuator shaft 100 by tilting by applying a force in the direction of arrow G by means of the release link 96 (cf. FIG. 5) becomes this tilt by pivoting the clamping lever 94 clockwise released and the operating shaft 100 released, this is up by the compression spring 194 postponed.

The functioning of the stitching head 28 will now be described in connection with FIGS. 9 to 14. These figures show parts of the stitching head 28 during various phases of a work cycle. The corresponding Parts of the stitching head 28 in these figures are numbered the same as in Figures 6 to 8 and are therefore no longer explained in more detail. The bending ram 114 is in the support 14 (FIGS. 11 to 14) guided in the direction of arrow E up and down. Two are pivotally supported on the support 14 stored bender 206 (see also FIG. 5).

In FIG. 9, the stamp 130 is in its rest position, which is also shown in FIGS. 6 and 7. The plunger 80 with its plunger head 158 is also in the rest position. The stapling head 28 moves past the feed wheel 42 of the wire section dispenser 30 (see FIG. 1) and thereby takes over Carrying a wire section 38 by means of the driver lugs 138 from the holding member 44 of the feed wheel 42. This wire section 38 is attached to the stamp arms by means of the permanent magnets 140, not shown in this figure 128 held. The web connecting the two punch arms 128 to one another is shown at 132. In FIG. 10, the stitching head 28 is located in the area of the die 98 (see FIG. 4), with the stamp 130 is still in its rest position.

As the stitching head 28 slides along the die 98, the wire section 38 becomes U-shaped bent into a bracket 104, the side arms 104 'sliding into the grooves 136 of the punch arms 128. By the action of the pivot link 102 on the slide shoe 200, the actuating shaft 100 brought into its lower end position shown in Figure 8, whereby the punch 130 in the in Figures 8 and 11 clamp setting position 130 'is pivoted. In the course of this pivoting movement, the punch arms grip 128 in the area of their thickening 134 in the grooves 148 of the clip holding member 146, whereby the lateral arms 104 'are held in the grooves 136. With 144 the pivot levers are designated, on which the staple guide member 146 is attached. The plunger head 158 of the plunger 80 is in the Clamp setting position 130 'of the stamp 130 also between the two stamp arms 128, but in the area between the shaft 120 and the thickenings 134. When the tappet link 78 acts on the tappet 80 this is pushed against the support 14 in the direction of arrow F, as shown in FIG. there the guide wedges 160 formed laterally on the tappet head 158 slide into the grooves 136 in FIG Clamp setting position 130 'located punch arms 128. With the pushing groove 162, the clamp 104 is made from the Stamp 130 ejected, the side arms 104 'at the same time by those placed on the support 14 Printed sheets 20 are pushed. When the plunger 80 is lowered, it slides on the wedge surface 154 'of the clip guide lug 154, whereby the bracket support member 146 attached to the pivot levers 144 is clockwise is pivoted (see FIG. 8). The clip guide lug 154 holds the side arms 104 'of the clip 104 in the grooves 136 until the clip 104 is inserted into the press sheets 20 and the clip guide tab 154 out of the area of the grooves 136, is pivoted by the subsequent lifting of the bending ram 114 in the direction of arrow E, the bending machines 206 are pivoted in the upward direction, with the result that the portions of the lateral arms protruding into the area of the bender 206 104 'are bent against each other (Fig. 13). The plunger 80 is always through the plunger link 78 still held in the lower end position. After the plunger 80 has run out of the plunger link 78 moves 14 under the force of the compression spring 166 back into the upper rest position, as shown in FIG. 14 is shown. By lowering the bending plunger 114 in the direction of arrow E, the bending machine 206 in swung back to their original position. When the stitching head 28 runs past the release link 96 the actuating shaft 100 released by the clamping lever 94, which causes the stamp 130 to pivot back effected in the rest position.

In FIGS. 15 and 16 are the two stapling head arrangements indicated by the arrow 30 in FIG 24 associated Drant section dispenser 30 shown enlarged. Each of these wire section dispensers 30 is constructed in the same way as the wire section dispenser 30 shown in FIG. 1. The cutting device 32 is driven by a circumferential toothed belt 208. A pair of conveyor rollers 210 conveys the one sandwiched between them Wire 36 gradually in the direction of the arrow H. A cutting knife movable up and down in the direction of arrow I. After each conveying movement of the wire 36, 212 separates a wire section 38 from the lowering Wire 36 off. The cutting knife 212 is followed by the magazine below the cutting device 32 40 arranged. It has an essentially gap-shaped, approximately in the vertical direction Stacking shaft 214 in which the falling wire sections 38 are substantially horizontal Are stackable one above the other in the direction of the longitudinal extension.

A pre-stacking device 216 with a tongue 218 is provided at the upper end of the stacking shaft 214, which can be moved into and out of the stacking shaft 214. At In the area of the stacking shaft 214, the tongue 218 is moved a number by means of the cutting device 32 wire sections 38 separated from the wire 36 are stacked. By briefly withdrawing the Tongue 218 then drops these stacked wire sections 38 together into the stacking shaft 214. This prevents this an erection and tilting of the wire sections 38 during the free fall and guarantees a clean Stacking of the wire sections 38 in the stacking shaft 214.

The two conveyor wheels 42 arranged below the magazines 40 are seated in a rotationally fixed manner on a common, on a pair of support levers 222 rotatably mounted bearing shaft 224. By means of a drive belt 226 on the bearing shaft 224 acting drive device 228 are the two feed wheels 42 in the direction of arrow V. driven revolving.

Each feed wheel 42 has two spaced-apart parallel disks 230, between which in At certain intervals, the holding members 44 are arranged along the circumference. The holding links are U-shaped formed and have at their radially outward free ends on the periphery of the disks 230 slightly protruding driver flanks 232. In a similar way to this is described in connection with the stitching head 28, is a permanent magnet arrangement on the holding members 44 provided in order to pass the magazine 40 by means of the driver flanks 232 from the To hold stack shaft 214 detached wire sections 38.

The stitching heads 28 are spaced further apart than the holding members 44 Circumferential speed of the feed wheels 42 is lower than the rotational speed of the stitching heads 28, so that the next stitching head 28 meets the next holding member 44. The stitching head 28 thus runs past the holding member 44 and pulls with the driver lugs 138 arranged on the punch arms 128 from Holding member 44 from the relevant wire section 38 and holds it by means of permanent magnets 140 Stamp 130 fixed. The holding members 44 are displaceable in the radial direction in a generally known manner and spring-loaded, in order to be able to accept tolerances and to ensure that the To ensure wire sections 38 from the stacking shaft 214 and transfer to the stitching heads 28.

With the help of Figures 17 to 23, the operation of the stapling station shown in Figures 4 and 5 is now 22 explained.

The initial region of the driver link 92 is shown in FIG. When rotating in the direction of arrow U, the follower rollers 86 of the drivers 82 run on the driver link 92 , which has the consequence that the driver 82, which is guided on the holding part 68 so as to be displaceable in the radial direction the relevant pads 14 of the collecting drum 10 are lowered. The V-shaped driver profiles grip around 84 the supports 14. This has the consequence that the arranged on the support profile 62 in FIG Stapling heads 28, not shown, with respect to the assigned support 14 or the printed sheets placed thereon 20 are precisely aligned. Furthermore, the holding arrangement 52 is driven exclusively by entrainment by the catches 82 which are in engagement with the supports 14. The catches 82 are only in the upper one Area of the orbit of the collecting drum 10 lowered to the pads 14, so in the lower area of the Orbit the printed sheets 20 stapled by the stapling station 22 in the direction of the axis of rotation 12 the supports 14 and driver profiles 84, which are now spaced apart, can be conveyed away, or that the printed sheets 20 to be stapled can be brought into the area of the stapling station 22.

In the following, a stitching head 28 is now in the course of one revolution of the holding arrangement 52 Starting wire segment dispenser 30, tracked. As the stitching heads 28 pass the wire section dispenser they are in their outer rest position, seen in the radial direction, in which they are from the supports 14 are spaced. Furthermore, the stamp 130 are pivoted back into the rest position, so that the free ends of the punch arms 128 are directed towards the outside when viewed in the radial direction. When walking past of the stapling head 28 on the relevant holding member 44 of the feed wheel 42 becomes that of the holding member 44 supplied wire section 38 detached from the driver lugs 138 and taken away (Fig. 18).

In the course of the further rotation in the direction of arrow U, the stitching heads 28 reach the area of the die 98, as shown in Figure 19. Seen in the direction of the arrow U, the distance between the backdrop-shaped is reduced Die 98 and the shaft 120, so that when the plunger 130 is in the rest position, the relevant wire section 38 bent into a bracket 104 and pushed into the grooves 136 of the punch arms 128 (Fig. 19). When the swivel link 102 is reached, the sliding shoe 200 runs onto it, with the result that the actuating shaft 100 is pressed inward in the radial direction in the direction of arrow F. becomes. This translational movement of the actuating shaft 100 is converted into a pivoting movement via the pinion 190 the shaft 120 implemented. This has the consequence that the stamp 130 from its rest position in the Is pivoted counterclockwise by 180 ° into the clamp setting position 130 ', after which the free ends the punch arms 128 face the supports 14 in the radial direction toward the inside. Through the clamping lever 202, the actuating shaft 100 against the force of the compression spring 194 (see FIG. 6) in its lower End position held (Fig. 20). In the course of the further rotation in the direction of arrow U, when the driving link is reached 92 the drivers 82 are lowered onto the supports 14, as described above. Subsequently the following rollers 74 (see FIGS. 4 and 5) reach the area of the pair of lowering blocks 76, as a result of which the support profile 62 with the stitching heads 28 arranged thereon in the direction against the supports 14 certain amount is lowered. The support member 118 comes with its pressing tabs 170 on the Pads 14 astride printed sheets 20 to the system. It should be noted that the pressing lugs 170 the printed sheets 20, seen in the direction of the support 14, in front of and behind the bracket 104 and on both Hold sides of this, which leads to a particularly clean stitch. It should also be noted that the support part 118 with respect to the bearing arrangement 172 fixed to the support profile 62 as a function of the thickness the printed sheet 20 is shifted. This ensures a clean stapling of sheets of different thickness 20 guaranteed without having to readjust the device (see FIG. 21).

In the case of stitching heads 28 resting on the printing sheet 20, these are conveyed against the ram backdrop 78. In a first section 78 'seen in the direction of the arrow U, the tappet link 78 extends with one another reducing distance to the orbit of the pads 14 (Fig. 22). In this area, the plunger becomes 80 in Lowered direction against the printed sheets 20, whereby the clip 104 is ejected from the stamp 130 and is placed in the printing sheet 20. In a section 78 'adjoining section 78' the slide link 78 with a constant distance with respect to the supports 14. In this section, the slide head 158 presses the clip 104 snugly against the printed sheets 20. This prevents the clip from retracting 104 when bending the lateral arms 104 'as a result of lifting the bending ram 114 in the direction of the arrow E and the associated pivoting of the benders 206 (see also FIGS. 11 to 14).

After the clamp 104 has been set and the lateral arms 104 'have been bent, the ram 80 slides beneath the effect of the compression spring 166 and the distance increasing in the end region of the slide link 78 back to the support member 118 in its radial position seen in the radial direction.

Following the pusher link 78, the distance between the pair of lowering links 76 increases the holding arrangement 52, which has the consequence that the stitching heads 28 of the pads 14 or the stapled printed sheet 20 deposited thereon can be lifted off. This is shown in FIG. 23. In the course of the further rotation the stitching heads come in the area of the release link 96, which the clamping lever 94 clockwise panned. This releases the operating shaft 100 so that it is under the force of the Compression spring 194 (see FIG. 6) is pushed outwards in the direction of arrow F in the radial direction. this has now again swiveling the stamp 130 back out of its clamp setting position 130 'into the rest position clockwise. The stitching heads 28 are now ready again, from the wire section dispenser 30 to take on a new wire. With the further rotation of the collecting drum 10, the stapled are now Printing sheet 20 in the direction of the axis of rotation 12 from the area of the stapling station 22 of an exit station, not shown promoted.

By separating the wire section preparation from the stitching heads 28, these can be constructed very simply his. Moreover, only a single wire section dispenser 30 is required for each stitching head arrangement 24, which keeps expenses to a minimum. In addition, the wire section dispenser 30 can be in which the clamps 104 are placed in the printed sheets 20 are removed. As a consequence, that there is sufficient time for the preparation of the brackets 104 in the area between the wire section dispenser 30 and the bracket setting area is available. For stapling heads with swiveling stamps 130 can the processing of the clamps 104 takes place in a different position from the clamp setting position 130 ', which means that the different functions of the stitching heads 28 are spatially separated from each other; this in turn has the consequence that the stitching heads 28 are simple in construction with small dimensions.

Of course, the die can be used to bend the wire section 38 into a bracket 104 on each Stapling head 28 itself may be provided. This has an eccentric shape to the shaft, so that in the In the course of the pivoting movement of the stamp 130 from its rest position into the clamp setting position 130 ', the clamp 104 is formed. Such a die could in particular be used as an extension of the clip holding member 146 be formed clockwise on this.

It is of course also possible for the drivers to be arranged on the stitching heads. That's the way it is quite conceivable that the pressing lugs 170 serve as drivers. A separate drive for the stapling station 22 is no longer necessary and synchronization problems between the rotation of the collecting drum 10 and the stitching head assemblies 24 are eliminated.

Of course, the traction element or the holding arrangement 52 can be operated by means of its own drive motor be driven all round. It is also conceivable for the wire section dispenser to be an exchangeable magazine or that the wire sections are fed directly from the cutting device to the stitching heads.

Finally, it should also be mentioned that the stamp 130 is in a position of rest for the wire transfer different wire transfer position can be. The wire takeover position corresponds but not the clamp setting position 130 '. The wire sections 38 run essentially parallel to Swivel axis 122.

It goes without saying that the stapling stations 22 of the devices according to FIGS. 2 and 3 are constructed similarly, like the stapling station 22 described above in connection with the device according to FIG. 1.

Stapling heads, which are particularly suitable for devices according to the invention for wire stitching of printed matter are described in EP-A-0 399 322.

Devices of the type described, in which a stapling head is permanently assigned to each edition, allow also the mutual displacement of the stitching heads of a stitching head arrangement in the longitudinal direction of the supports. So For example, every second stitching head can be arranged with respect to the other stitching heads arranged in one plane be slightly offset. The two groups of stitching heads then advantageously each run on their own Wire section dispenser over. When stapling the stapled sheets, not all staples come on top of each other to lie.

Claims (10)

1. Device for the wire stapling of multipart folded printed products (20), with a conveyor arrangement (10, 14) for conveying the folded products (20) to be stapled with a folding line extending substantially at right angles to the conveying direction (U) along a movement path through a stapling zone (D), which arrangement is formed by saddle-shaped supports (14) which circulate along a closed circulation path, onto which the printed products can be deposited in a straddling manner and which run parallel to one another and extend substantially at right angles to their circulating direction (U), at least one stapler head arrangement (24), comprising a number of stapler heads (28) for setting wire staples (104) along the folding lines, which heads move along with the products (20) substantially at the same speed of movement as the said products during the setting of the wire staples (104) and are arranged with interspacing (A) one after the other in the direction of movement (U'), the movement path (26) of the stapler heads (28) in the stapling zone (D) running along a section substantially parallel to the movement path of the products (20), means for forming the wire staples (104) from substantially straight wire lengths (38) held by the stapler heads (28), at least one staple closing arrangement (114, 206), comprising a number of bending-around means (206) which are intended for interacting with the stapler heads (28) in the stapling zone (D), are arranged in the supports (14) and are provided for closing the set wire staples (104), which circulate at the speed of movement of the products (20) resting on the supports (14) along the closed circulation path of the supports (14), which in the stapling zone (D) runs along a section substantially parallel to the movement path (26) of the stapler heads (28) and to the movement path of the products (20), characterized in that the stapler heads (28) circulate likewise at the speed of movement of the products (20) along a closed movement path (26) in a circulating direction (U) and move along with the products (20) in the stapling zone (D) along an elongated section of the movement path (26) of the said products and in that a stationary wire length dispensing unit (30) is arranged on the movement path (26) of the stapler heads (28) and dispenses one wire length (38) at a time to the stapler heads (28) running past it, which wire length extends substantially at right angles to the circulating direction (U') of the stapler heads (28).
2. Device according to Claim 1, characterized in that the wire length dispensing unit (30) is arranged outside the stapling zone.
3. Device according to Claim 1, characterized in that the stapler head arrangement (24) is separated from the conveyor arrangement (10, 14).
4. Device according to Claim 1, characterized in that the supports (14) rotate round a common axis of rotation (12) extending substantially in a horizontal direction.
5. Device according to Claim 4, characterized in that the movement path (26) of the stapler heads (28) extends round the rotational path of the supports (14).
6. Device according to Claim 1, characterized in that in the stapling zone (D) the movement path (26) of the stapler heads (28) and the movement path of the supports (14) extend substantially in a straight line.
7. Device according to Claim 6, characterized in that the wire length dispensing unit (30) is arranged on the inside of the closed movement path (26) of the stapler heads (28).
8. Device according to Claim 1, characterized by a second stapler head arrangement (24) with an associated second staple closing arrangement (114, 206), in which arrangement the stapler heads (28) of the two stapler head arrangements (24) move along movement paths (26) that extend parallel to each other.
9. Device according to Claim 8, characterized in that each stapler head arrangement (24) has assigned to it its own wire length dispensing unit (30).
10. Device according to Claim 1, characterized in that the wire length dispensing unit (30) dispenses straight wire lengths (38) to the stapler heads (28) and in that these straight wire lengths (38) are bent into a U shape during their conveyance to the stapling zone (D).

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