DE19958573C1 - Stitching cylinder at the folding station of a rotary printing press has a ring piece with projections towards the staple guide grooves to prevent breakages at the staple legs to reduce stoppages during binding - Google Patents

Abstract

The stitching cylinder, at the folding station of a rotary printing press, has a ring piece (2) with projections (8,9) towards the sides of the staple guide grooves (6,7) of the stapling piston (5). The structure prevents breakages at the legs of the staples (16) when binding the folded sheets. The projections (8,9) are at the end sides of a cylinder pin (10) which rotates in a drilling (11) through the ring piece (2).

Description

The invention relates to a stitching cylinder of a folder Rotary printing press.

A generic stitching cylinder of a folder one Rotary printing press is in the book Braun, Atlas of the newspaper and Illustrationsdruckes, page 103, Polygraph Verlag Frankfurt am Main, 1960 shown. The tacking cylinder contains a tacking piston and a ring piece. With a movement of the tacking piston on a bending part (bending roller) to be provided on a Wire piece bent the legs of a staple, which then in Find space for the staple guide grooves in the staple.

With such a stapling cylinder it is disadvantageous that one The broken piece of the staple in the Can hold the staple guide groove of the staple. This leads to incorrect brackets in the product, since the following staples no longer come from the guide groove are recorded and thus lost. To correct the fault the printing machine is stopped, the ring piece is removed from the stitching cylinder, the fragment is removed from the guide groove and the ring piece is mounted again and be aligned. This work is time consuming and conditional corresponding machine downtimes. There are also copies of waste.

DE-OS 20 24 257 addresses the problem of wire stoppers in staplers addressed. Contact plates are mentioned, which differ from the fed stitching wire are touched, whereby a circuit is closed, the switches off the wire transport drive.

DE-PS 75 49 24 strikes to avoid wire stoppers on one Stapler in front, the wire path of series-connected, wire-guiding  Provide parts inclined, thereby removing wire residue from a subsequent one Piece of wire to be removed automatically.

The invention has for its object to provide a stitching cylinder in which Blockages in the case of leg breaks of the staples can be avoided.

The object is achieved according to the invention in a generic stapling cylinder with the characterizing features of claim 1 solved. At a Brackets break when the plunger moves away from the ring piece by means of the lugs protruding into the clip guide grooves, the broken one Clip leg out of the staple guide groove of the staple.  

This means that the plunger is ready to accept the following staples and it there are no production disruptions. Furthermore, when installing the Ring piece whose time-consuming alignment in the tacking cylinder to the tacking piston, because this centers itself with the lugs on the tacking piston. Overall machine downtimes avoided.

The noses are easy to manufacture and can be replaced when worn, when they are on the end faces of a cylindrical pin are arranged, which is rotatable in a bore of the ring piece.

The invention will be explained in more detail using an exemplary embodiment become. The accompanying drawings show schematically:

Fig. 1 shows a stitching cylinder in cross-section,

FIG. 2 shows the section II-II of Figure 1.

Fig. 3: a cylinder pin with lugs on the end faces.

Fig. 1 shows a stitching cylinder in cross section, the section being swept by a stitching head 1 . The stitching cylinder can carry several, for example two, stitching heads 1 arranged next to one another in the direction of its longitudinal axis. Each stitching head 1 has a ring piece 2 which is screwed onto the stitching cylinder body 4 by means of a screw 3 . The ring piece 2 is encircled by a tacking piston 5 ( FIG. 2), the surfaces of the tacking piston 5 facing the ring portion 2 each having a clip guide groove 6 , 7 . The sides of the ring piece 2 pointing towards the clip guide grooves 6 , 7 in turn have lugs 8 , 9 projecting into the clip guide grooves 6 , 7 . The lugs 8 , 9 are arranged on the end faces of a cylindrical pin 10 , which is rotatably supported in a bore 11 of the ring piece 2 . This cylinder pin 10 is shown in FIG. 3.

When the plunger 5 moves towards a bent part, for example a bending roller 12 , on a provided piece of wire 13 , the legs 14 , 15 of a staple 16 . The unbent wire piece 13 is shown thin. The bending roller 12 is rotatably mounted in the folder.

When the stapling piston 5 moves away from the ring piece 2 , the staple 16 is released and is guided to the stapling point in a manner not shown when the stapling cylinder rotates. In this moving away of the staple piston 5 is possibly a broken, stuck in a Klammerführungsnut 6, 7, legs 14, 15 of a lug 8, 9 pushed out of the Klammerführungsnut 6. 7

During assembly work, the ring piece 2 can be assembled with only a small amount of time, since it is centered on the lugs 8 , 9 engaging in the clip guide grooves 6 , 7 to form the plunger 1 and thus alignment is not required.

Reference list

1

Stapling head

2nd

Ring piece

3rd

screw

4th

Staple cylinder body

5

Staple

6

Clamp guide groove

7

Clamp guide groove

8th

nose

9

nose

10th

Dowel pin

11

drilling

12th

Bending roll

13

Piece of wire

14

leg

15

leg

16

Staple

Claims (2)

1. stitching cylinder of a folder of a rotary printing machine with a stitching piston ( 5 ) and a ring piece ( 2 ), the stitching piston ( 5 ) moving on a bending part ( 12 ) to a provided piece of wire ( 13 ) the legs ( 14 , 15 ) a staple ( 16 ) bends and the legs ( 14 , 15 ) find place in the staple guide grooves ( 6 , 7 ) of the staple piston ( 5 ), characterized in that the ring piece ( 2 ) on the staple guide grooves ( 6 , 7 ) of the Has sides ( 8 ) in the staple guide grooves ( 6 , 7 ) projecting plunger ( 5 ) projecting lugs ( 8 , 9 ), and that with these lugs ( 8 , 9 ) when the plunger ( 5 ) moves away from the ring piece ( 2 ) legs ( 14 , 15 ) of the staple ( 16 ) can be pushed out of the staple guide grooves ( 6 , 7 ) of the staple piston ( 5 ). 2. stitching cylinder according to claim 1, characterized in that the lugs ( 8 , 9 ) are arranged on the end faces of a cylindrical pin ( 10 ), and that the cylindrical pin ( 10 ) rotatably in a bore ( 11 ) of the ring piece ( 2 ).