JPH0736940Y2 - Chiyotsupa folding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a chopper folding device in a folding machine of an offset rotary printing press.

[Prior Art] Conventionally, a chopper arm to which a chopper blade is fixed is oscillated around a certain supporting shaft, and the signatures are continuously transferred directly below the chopper blade by a belt, and the signature is pressed by the chopper blade. Then, it was sandwiched by a nip roller below the chopper blade to form a folded signature.

[Problems to be Solved by the Invention] However, since a moving signature is pressed by the chopper blade, the impact force of collision between the chopper blade and the signature is received, and therefore the folding accuracy of the signature is not so good. There wasn't.

[Means for Solving Problems] In the present invention, a signature folded in a folding cylinder of a folding machine at a right angle to the folding cylinder is conveyed by a guide belt in a direction perpendicular to a horizontal folding line of the signature. In a chopper folding device for continuously creating a signature in which the signatures are folded in two in a transfer direction, a rotation axis that is arranged parallel to the transfer direction of the guide belt and is orthogonal to the transfer direction of the guide belt. A plurality of rotatable discs, a transmission member that engages with the discs, an eccentric pin rotatably supported at an eccentric position of the disc at a right angle to the disc, and in parallel along the plane of the disc. It is characterized by comprising a chopper blade fixed to an eccentric pin and a drive mechanism for rotationally driving the disk.

Further, the transmission body is a timing belt, and the disk is a gear.

Further, the transmission body is a chain, and the disk is a sprocket.

[Embodiment] FIGS. 1 and 2 show the mechanism of a chopper folding device A of the present invention. A signature 1, which is folded horizontally by a folding cylinder of a folding machine (not shown), is sandwiched by a guide belt 2 and sequentially fed to a chopper folding device A on the left side. As shown in FIGS. 1 and 2, the chopper folding device A supports rotatable discs 3 and 4 having gears 3a and 4a formed on the outer circumference thereof, and the discs 3 and 4 have timing belts.
15 is engaged, and either one of the disks 3 or 4 is driven by a folding cylinder drive system (not shown).
Further, in FIG. 3, eccentric pins 5 and 6 located at the same eccentric position are mounted on the disk 3 and the disk 4, and the chopper blade 7 is mounted via the pairing 8. Therefore, the chopper blade 7 can rotate like a connecting rod that connects the wheels of the steam locomotive, and can press the signature 1 transferred by the belt 2 to the folded signature. Immediately below the chopper blade 7, a pair of nip rollers 10 for sandwiching a folded signature is supported by a housing (not shown), and the signature is delivered downward via a pair of belts 11.

Next, the operation of the present invention will be described.

As shown in FIG. 1 and FIG. 2, a signature 1 folded laterally by a folding cylinder of a folding machine is sandwiched by a guide belt 2 and sequentially fed into a chopper folding device A on the left side of the drawings. Then, as shown in FIG. 1, the chopper blade 7 moves downward in the oblique direction with respect to the signature 1 fed just below the chopper blade 7, and the signature 1 is placed in the valley portion of the pair of nip rollers 10, 10. The nip rollers 10 and 10 are pressed to form a folded signature, which is fed to a delivery device (not shown) provided below.

[Effect of the Invention] As described above, the chopper blade is rotatably mounted on the eccentric pin that is fixed to the eccentric position of the two disks by engaging the two disks with the transmission body, and drives one of the disks. Since it is configured to, the chopper blade that moves obliquely downward hits the signature being transferred, and when the signature is pressed between the pair of nip rollers to form a double signature, the chopper blade and the signature being transferred are Since the relative speed in the transfer direction of the is reduced so as to reduce the impact caused by the collision between the two, the folding accuracy can be improved.

[Brief description of drawings]

1 and 2 are schematic side views of a chopper folding device showing an embodiment of the present invention. FIG. 3 is a cross-sectional view showing a II cross section in FIG. 2. 1 ... signature, 2 ... guide belt, 3, 4 ... disk, 3a, 4a ... gears, 5, 6 ... eccentric pin, 6 ... eccentric pin, 7 ... chopper blade, 10 ... nip roller, 15 ... timing belt

Claims (3)

[Scope of utility model registration request] 1. A folding belt of a folding machine, which is folded in a direction parallel to the folding cylinder, is conveyed by a guide belt in a direction perpendicular to a lateral folding line of the folding machine, and the signature is moved in the conveying direction. In a chopper folding device for continuously producing folded signatures, (a) a plurality of rotatable discs arranged parallel to the guide belt transfer direction and having a rotation axis perpendicular to the guide belt transfer direction. (B) a transmission member that engages with the same disk, (c) an eccentric pin rotatably supported at an eccentric position of the disk at a right angle to the disk, and (d) parallel along the plane of the disk. 1. A chopper folding device comprising: a chopper blade fixed to the same eccentric pin; and (e) a drive mechanism that rotationally drives the disk. 2. The chopper folding device according to claim 1, wherein the transmission is a timing belt and the disk is a gear. 3. The chopper folding device according to claim 1, wherein the transmission body is a chain and the disk is a sprocket.