DE102008016949A1 - Stiching head for stitcher for stiching e.g. printing press product, has spring pressure pad positioned in guide, which is partially engaged to end in one of detent recesses - Google Patents

Abstract

The head (1) has a driver slide and a rotatable axle including an anti-twist device (3). The rotatable axle has detent recesses (5) i.e. knurl, for height adjustment of the driver slide. A guide is positioned perpendicular to the rotatable axle. A spring pressure pad is positioned in the guide, which is partially engaged to an end in one of the detent recesses. A complete channel running at the rotatable axle is provided along the rotatable axle for the height adjustment of the driver slide.

Description

The The invention relates to a stapling head for a stapler with the features of the preamble of claim 1 and a saddle stitcher with the features of the preamble of claim 7.

Such stapling heads are known for example from the document DE 44 44 220 A1 for the production of printed products such as magazines, magazines, brochures, flyers or the like. Here are usually several folded sheets, card inserts or similar sheet printing material assembled before it is stapled in a stapler to a final product, ie a booklet, a book or a magazine. For this production process so-called saddle stitchers are used in which so-called investors, the individual flat products are placed on a transport device, which is usually designed as a gathering chain.

Of the Transport runs along several feeders, of which each a corresponding flat product, for. B. a folded sheet, in the desired order passes, so that the final product, e.g. A booklet or the like, stacked in front of the stapler on the transport device.

The Staples required for stapling are made of a wire formed, the first passed through a cutting box and gets into the hole of a staple former. By a downward movement a staple holder with a staple driver therein become the leg ends of the later wire clip on the side edges bent over the former. The staple legs will be later into the stapled to be stapled, while from a staple support carried and stabilized become.

Clip holder, Staple driver and staple support together make one in a guide running driver carriage, wherein the Height adjustment of the driver carriage according to a predetermined length of the wire clip to be formed adapted can be. The height adjustment takes place in commercial Stapling heads on a rotatable axis, which with a thread that engages in the driver carriage. The rotatable axle is also mounted on a carriage, the displaceable in the guide along with the driver carriage is. By further insertion or removal of the thread in the driver carriage or from the driver carriage whose height is relative adjusted to the remaining stapling head. The manually adjustable rotary axis includes in commercial stapling heads with a a knurled rotary handle, which as anti-rotation a leaf spring with a tip engages.

adversely At this state of the art is that the knurling in the area of a line revolving around the axis, because the contact of the rotation with the knurling of the Rotary handle is essentially punctual. Thus arises at more common use a kind of rut, which is perpendicular runs to the knurls. Likewise, too a quick wear of the tip of the leaf spring. This wear leads in the end, to a rapid fatigue of the rotation, so that the rotary handle and / or the leaf spring must be replaced. As a further disadvantage, it turns out that the leaf spring after "Ausleiert" a certain time and thus not Press more effectively against the knurled knurl can. Also, this is a reliable operation of the Anti-rotation in a short time no longer guaranteed.

task The invention is a stapling head or a saddle stitcher of educate the aforementioned type so that a less susceptible to wear Anti-rotation is available.

The Task is solved by a stapling head with the features of the characterizing part of claim 1 or by a saddle stitcher with the features of the characterizing part of claim 7.

In the dependent claims are advantageous embodiments and further developments of the invention explained.

Consequently comprises a stapling head according to the invention or a at least one saddle stitcher according to the invention seated in a leadership resilient pressure piece, which at one end at least partially in a Einrastvertiefung the rotatable axle can be latched.

The guide is directed perpendicular to the rotatable axis. In a resilient pressure piece, for example, a ball is held by a spring in a corresponding socket. The ball protrudes partially through the socket and thus forms one end of the resilient pressure piece. The resilient thrust piece is mounted in the guide such that the ball is in contact with the surface of the rotatable shaft. In addition, the resilient thrust piece is positioned at such a distance from the rotatable axis that the ball, which is pressed by the spring force against the surface of the rotatable shaft, also has some freedom of movement to be pressed by the spring force into the latching recess, as soon as they when turning the knob at the contact point with the ball appears. This results in the advantage of a much lower wear, both of the resilient pressure piece as well as the one latching recess.

in principle Different variants of Einrastvertiefung are conceivable. At a Embodiment of the invention, the latching recesses be designed as a knurl. As a result of the fact that a ball is in contact with the knurling results less wear than a tip Leaf spring is the case.

It However, it is just as possible, instead of a knurling one or more latching recesses in the surface of the rotatable Integrate axis. This embodiment has the advantage that also coarser turning intervals marked thereby can be, if so desired. Meanwhile Knurling has the advantage of being uniform along a piece of the axis of rotation takes place.

A Particularly advantageous development of the invention is Snap-in recesses for marking certain height settings to provide the driver carriage along the rotatable axis. For example this could mean that the rotatable axle has a groove which runs around the rotatable axis and For example, the maximum height of the driver carriage indicates a second such groove is attached to the rotatable shaft, which is the minimum height adjustment of the driver carriage marked. It is also possible between both altitude settings to provide a knurl as anti-rotation.

One preferred embodiment may conceivably also consist of different Einrastvertiefungen, such as Knurls of individual recesses in circumferential grooves combine with each other to the driver's sled in its height to be positioned precisely and stored against rotation.

One particularly preferred embodiment of the invention additionally includes a measuring scale for determination the height adjustment of the driver carriage. It is for example conceivable to drive a pointer by the rotational movement of the rotary handle or the height of a moving part as a pointer to use for a measurement scale.

As well It may be desirable, the holding force of rotation adjustable to design. This can be achieved by the radial positioning the resilient pressure piece within the guide be achieved. An advantageous embodiment of The invention thus comprises means for radial positioning of the resilient Pressure piece along its guide. It is conceivable it, by means of a screw the resilient pressure piece closer or further from or to the rotatable axis.

There Anti-rotation devices are an integral part of saddle stitchers are, it is advantageous saddle stitcher with such anti-rotation equip. Accordingly, an inventive Saddle stitcher at least one rotation of rotating axes, which comprises at least one latching recess and at least a guide directed perpendicular to the rotatable axis is, wherein a seated in the leadership resilient pressure piece, which at one end at least partially latched in a Einrastvertiefung is, is provided. Advantageously, the wear time is also here this particularly vulnerable wearing parts in considerably increased.

One particularly preferred embodiment is Forming latching recesses as knurling. this makes possible a particularly precise adjustment of the rotary axis position.

Conceivable In particular, it is here, the pressure of the resilient pressure piece to adjust to the rotatable axis. This is possible by the presence of radial positioning means the resilient pressure piece along the guide. In a particularly advantageous manner, this is also by screwing along the guide allows. Thus lets the strength of the rotation in a simple way and Set way.

embodiment

in the The invention is based on an embodiment explained, which is shown in the drawing. In detail demonstrate:

1 a schematic section through a stapling head according to the invention,

2 a front view of a stapling head according to the invention,

3 a schematic section through the rotation and

4 a schematic representation of a section through a gear for adjusting the wire length.

In the figures, the essential parts of a stapling head 1 for stapling stacked sheets of paper by means of wire clips and an enlarged view of the rotation of the stapling head shown.

The 1 and 2 each show a front view of an embodiment of the stapling head according to the invention 1 , 1 shows egg NEN cut through the stapling head 1 in front view. You can see here, among other things, the rotation 3 , the rotary handle 2 , with which a height adjustment of the driver carriage takes place, the mechanism or the transmission 12 for adjusting the wire length and the wire guide 16 ,

The stapling head 1 includes a wire guide 16 through which the wire is guided to the cutting box. Through the cutting box for cutting the wire, the wire is in the yoke of a former 4 guided. The shaper 4 is on its back side by a return spring 13 deflectably held in position. Over the foot of the shaper 4 is the driver carriage, which includes a staple driver, a staple holder and a staple support.

In the upper area of the stapling head 1 is the anti-twist device 3 to see the height adjustment of the driver carriage. This is enlarged in 3 shown.

On the rotatable axle 10 is a turning handle in the upper area 2 appropriate. Perpendicular to the rotatable axle 10 is a guide 11 directed. In this leadership 11 is a springy pressure piece 6 brought in. This resilient pressure piece 6 includes a spring 8th and a ball 9 , which are on the rotatable axle 10 rests. The resilient pressure piece 6 becomes outward by screw means 14 held. In the amount of resilient pressure piece 6 is the lateral surface of the rotatable axle 10 as knurling 5 educated. Above and below the knurling 5 are two grooves 7 around the rotatable axle 10 incorporated around.

By changing the height adjustment of the driver carriage by means of a rotatable axle 10 is about a mechanics 12 in particular, the length of the piece of wire changed, which later forms the einzustoßende wire clip.

The Height adjustment of the driver carriage allows the forming of wire staples or their insertion into stapled from different lengths of wire.

clip holder and parenthesis drivers are driven by a cam, with which they are connected by eccentric to her attacking connecting rod are. The staple holder and the staple driver move initially together without a movement relative to each other, until the staple holder touches down on the stapled material. Subsequently The staple holder remains on the stapled material until the staple driver the wire clip completely driven around the stapled Has. Clip holders and staple drivers are shared over a drive pin driven.

staple driver and staple holders are held immovably against each other in the aforementioned manner. They perform their lifting movement during the first Working phase accordingly together.

At the end of the first working stroke phase, the staple holder attaches to the stapled material and at the same time abuts against a stop on the stapling head frame, so that its lifting movement is stopped. In the course of the first working stroke phase, the two side cheeks of the staple holder move laterally on the staple former 4 along and bend the two laterally projecting ends of a received in the retaining slot wire portion to legs of a U-shaped wire clip.

Of the Clamming accelerates at transition from the first Arbeitshubphase the second Arbeitshubphase strong, as the lifting movement of the pin during the first working stroke phase of the lifting movement from the staple driver and staple holder is the same, the rotational movement the cam thus superimposed. this leads to to a desirable "wrapping" the Wire clip.

To turn back the cam during idle stroke back to its original position, a return rail is provided which is mounted relative to the guide rail on the other side of the cam on the head frame and on which slides a return nose of the cam. When pivoting the cam back to its original position, the clip holders and staple drivers connected to the cam via the two connecting rods also come into their starting position with respect to one another, so that at the end of the idle stroke the moving parts of the stapling head 1 take their starting position again.

The two side cheeks of the clip holder have guide grooves on their mutually facing inner sides, into which the legs of the wire clip come to rest during bending. These two guide grooves, in which the wire clip holds by their spring tension, lead the two legs of the wire clip when driving into the stapled. The staple former 4 , in the retaining slot, the yoke of the wire clip is received, is located during the bending of the wire clamp in the path of the staple driver. The staple former 4 Finally, as the staple driver moves down, it becomes along a sloping surface 15 out of trajectory against the force generated by the return spring 13 on the back of the former 4 is exercised, steered.

Simultaneously or subsequently, a spring loaded clip support pivotally mounted on the clip holder pivots between the two side cheeks of the clip holder into the area in which are the legs of the wire clamp. The legs of the wire clip are supported by the guide grooves and the clip support all around and therefore can not bend to the side. A deformation of the wire clip when driving into the stapled is almost impossible.

The staple support has a similar oblique surface as the former 4 on to guide the staple support out of the way.

In 4 is a schematic section through a transmission 12 to see the setting of the wire length in the form of a gear drive. The leadership of the wire is done by the wire guide 16 , The wire is guided over wheels, which along its circumference an outer guide or outer groove 20 have. These wheels are with gears 17 firmly connected and on an axis 19 stored. By the rotation of the gears 17 and according to the rotational movement of the grooves 20 provided wheels become the wire within the guide 16 shifted, whereby the length of the wire clip to be formed piece of wire is adjustable. The drive of the gears 17 via a rack 18 , which is coupled to the height adjustment of the driver carriage. By adjusting the twist grip 2 Thus, the wire length is set.

all mentioned embodiments and further developments common to both stapling heads and saddle stitchers with anti-rotation of a rotatable axle, which at least a Einrastvertiefung includes, are equipped as well as with at least a guide directed perpendicular to the rotatable axis is and wherein a seated in the leadership resilient pressure piece, which at one end at least partially in one of the Einrastvertiefungen is latched, is provided.

1

stapling head

2

rotary handle

3

twist

4

molder

5

knurling

6

springy Pressure piece

7

groove

8th

feather

9

Bullet

10

rotatable axis

11

guide

12

mechanics for adjusting the wire length

13

Return spring

14

screw

15

slope area

16

wire guide

17

gear

18

rack

19

axis

20

External guide / outer groove

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 4444220 A1 [0002]

Claims (9)

Stapling head ( 1 ) for a stapler for stapling stacked sheets of paper, printed matter or the like by means of wire staples with a driver carriage and at least one anti-rotation device (US Pat. 3 ) of a rotatable axle ( 10 ), which at least one latching recess ( 5 ), for height adjustment of the driver carriage and with at least one guide ( 11 ) perpendicular to the rotatable axis ( 10 ), characterized in that one in the guide ( 11 ) seated resilient pressure piece ( 6 ), which at one end at least partially into one of the Einrastvertiefungen ( 5 ) is latched, is provided. Stapling head ( 1 ) according to claim 1, characterized in that at least one of the latching recesses ( 5 ) as knurling ( 5 ) is trained. Stapling head ( 1 )) according to any one of the preceding claims, characterized in that along the rotatable axis ( 10 ) at least one latching depression ( 5 ) is present to identify certain height settings of the driver carriage. Stapling head ( 1 ) according to one of the preceding claims, characterized in that along the rotatable axis ( 10 ) at least one completely around the rotatable axis ( 10 ) circumferential groove ( 7 ) is present to identify certain height settings of the driver carriage. Stapling head ( 1 ) according to one of the preceding claims, characterized in that a measuring scale for determining the height adjustment of the driver carriage is present. Stapling head ( 1 ) according to one of the preceding claims, characterized in that means ( 14 ) for radial positioning of the resilient pressure piece ( 6 ) along the guide ( 11 ) available. Saddle stitcher with at least one anti-twist device ( 3 ) of rotatable axes ( 10 ), which at least one latching recess ( 5 ), and with at least one guide ( 11 ) perpendicular to the rotatable axis ( 10 ), characterized in that one in the guide ( 11 ) seated resilient pressure piece ( 6 ), which at one end at least partially into one of the Einrastvertiefungen ( 5 ) is latched, is provided. A saddle stitcher according to claim 7, characterized in that at least one of the latching depressions ( 5 ) as knurling ( 5 ) are formed. Saddle stitcher according to one of the preceding claims, characterized in that means ( 14 ) for radial positioning of the resilient pressure piece ( 6 ) along the guide ( 11 ) available.