DE4116992C2 - Device for transporting signatures in a longitudinal folding device - Google Patents

Description

The invention relates to a device for Transport signatures into one Longitudinal folding device according to the preamble of Claim 1.

Such devices are known.

DE 32 39 799 C2 is a generic one Longitudinal folding device has become known. There are Tensioning rollers are provided through which the conveyor belts can be adjusted so that the ones to be folded Signatures are clamped with sufficient force.

The invention has for its object a Device for transporting signatures in one Longitudinal folding device to create with the largely can be prevented that the signatures in the fold area get lubrication points from the conveyor belts.

The task is characterized by the characteristics of the Part of claim 1 solved.

The advantages that can be achieved with the invention exist especially in that the impact intensity the signatures to be folded lengthways at one stop influenced and the impact surface for the signatures can be enlarged.

An embodiment is shown in the drawing and is described in more detail below.  

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See Fig. 1 is a side view of the longitudinal folding device against the supply device of the signatures,

Fig. 2 is a side view of the longitudinal folding device, without folding knife.

A longitudinal folding device 5 consists in known manner of a driven pair of folding rollers 1, 2, a cyclically reciprocating Längsfalzmesser 3, a plurality of upper powered conveyor belts 4 and the lower conveyor belts 6 and Andrückbürsten. 7 In addition, a folding table 8 with a folding opening and with a stop 9 is provided, against which the signatures 11 fed to the longitudinal folding device 5 collide and come to rest briefly, and are then longitudinally folded.

The signatures 11 are thus transported between a respective lower run 12 of the upper conveyor belts 4 and a respective upper run 13 until they strike the stop 9 . Once this has been done, the longitudinal folding knife 3 comes from above and presses the signatures 11 into a folding gap between the two driven folding rollers 1 and 2 . The lower runs 12 of the upper conveyor belts 4 move essentially at a small distance from a surface of the folding table 8 and parallel to it - or else at a small angle z. B. 0.5-1.5 ° rising upwards.

The lower runs 12 are in sections in contact with upper runs 13 of the lower conveyor belts 6 .

The upper runs 13 lead through slots in the folding table 8 over horizontally, in or against the direction of the signatures 11 together or individually displaceable tape rolls 16 at a small angle α, z. B. 2-3 °, from the horizontal down to a fixed, rotatable deflection roller 14th The upper conveyor belts 4 run over rotatable deflection rollers 15 which are fixed to the frame.

The tape rolls 16 are z. B. rotatably mounted on a spindle 17 mounted in fixed guides. The spindle 17 is horizontally displaceable in and against the signature transport direction.

A right end position of the highest elevation of the tape rolls 16 lies approximately at the end 18 of the maximum width of the signature 11 . The tape rolls 16 can now be moved continuously from their right end position 18 in the direction of the stop 9 . As a result, the angle of inclination α of the upper run 13 against the horizontal folding table surface becomes larger and the signature 11 dips longer into the outlet gusset 19 between lower 12 and upper runs 13 . As a result, the pinching process of the signature end by upper and lower strands 12 , 13 becomes more intensive and the beginning of the signature strikes the stop 9 more violently.

Due to the intensive contact of the conveyor belts 4 , 6 with the upper and lower sides of the signature 11 , their stress naturally also increases. Due to the possibility of changing the outlet gusset angle β and the continuous extension of the outlet gusset 19 in the direction of the stop 9 and away from it, it is possible to change the impact intensity of the signatures to be folded over a wide range and thus optimally adjust them to the paper type and signature thickness . The outlet gusset angle β is understood to mean the angle which arises between the underside of the lower run 12 and the top of the upper run 13 .

Characterized in that the upper conveyor belts 4 run at a distance from the upper surface 20 of the folding table 8 and the lower conveyor belts 6 dive down, the stop and impact surface 10 of the stop 9 can be designed continuously and thus the impact surface can be increased.

Parts list

1 folding roller
2 folding rollers
3 longitudinal folding knives
4 conveyor belts, upper
5 longitudinal folding device
6 conveyor belts, lower
7 pressure brushes
8 folding table
9 stop
10 stop and impact surface
11 signatures
12 Trumm, lower
13 Trumm, upper
14 deflection roller
15 deflection roller
16 tape roll
17 spindle
18 end
19 outlet gusset
20 area
α = angle
β = gusset angle

Claims (4)

1. Device for transporting signatures in a longitudinal folding device with a folding table, a folding knife, rotating folding rollers and a stop for the signatures to be folded, wherein the signatures are transported by touching the upper and lower conveyor belts, characterized in that dummies ( 12 ; 13 ) the upper (4) with lower conveyor belts ( 6 ) in the area of the folding table ( 8 ) form an outlet gusset ( 19 ) that the run ( 13 ) of the lower conveyor belts ( 6 ) at an angle (α) to the horizontal downwards, are arranged crossing the folding table. 2. Device according to claim 1, characterized in that a position of the outlet gusset ( 19 ) is arranged changeably. 3. Apparatus according to claim 1 and 2, characterized in that for changing a position of the outlet gusset ( 19 ) displaceable, at least with the upper runs ( 13 ) of the lower conveyor belts ( 6 ) in contact with the belt rollers ( 16 ) are provided. 4. Device according to claims 1 to 3, characterized in that between the lower run ( 12 ) and the upper surface of the folding table ( 8 ) the stop ( 9 ) has a continuous stop and impact surface ( 10 ).