SU1715582A1 - Device for cutting book units into two equal parts - Google Patents

Abstract

The invention relates to the printing industry, in particular to cutting book blocks into equal parts, and improves the quality of cutting by providing reliable clamping of the cut sheets to the cutting tool. The device comprises vertical guides having a curved outer surface for orienting the blocks and an inner surface in which vacuum channels are made to press the web in the cutting zone. A flat knife is installed in the guides, which has a peer of cams of the same profile located on its back side, interacting with corresponding fixed roller stops. The knife moving mechanism includes a connecting rod connected to the drive crank, and the block feeding mechanism towards the knife has a pair of clamps and two divergent rails symmetrically located relative to the plane of movement. 3 il. WITH

Description

The invention relates to the printing industry, in particular to cutting book blocks into equal parts.

A device for cutting book blocks into equal parts is known, comprising a bed, a flat knife mounted in the bed guides with the ability to move in a direction perpendicular and coinciding with the feed direction of the blocks and associated with the movement mechanism including the connecting rod interacting with the driving gear. a crank, a block feed mechanism in the direction of the knife, including a pair of clamps and two expanding guides symmetrically located relative to the plane of the knife movement.

A disadvantage of the known device is the absence of the necessary reliable pressing of the cut sheets of book blocks at the place of their contact with the cutting tool.

The purpose of the invention is to provide reliable clamping of the sheets to the cutting tool during their cutting.

This goal is achieved by the fact that the body of the knife guides is provided with channels through which, during the working stroke of the knife, air is sucked from the area of the combing, creating a vacuum in it.

FIG. 1 is a schematic diagram of a device for cutting book blocks into equal parts, a plan view; in fig. 2 shows the mechanism for moving the knife; in FIG. 3

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- bed frame with movable knife, incision.

A device for cutting book blocks into equal parts contains a mechanism for feeding a pack of book blocks in the direction of the knife 1, including two expanding guides 2 and 3, symmetrically located relative to the knife movement planes, as well as pairs of front 4 and rear 5 clamps of the conveyor. The knife 1 is placed in vertical guides with a curved outer surface for orienting the blocks, and through a connecting rod 13 is connected with a driving crank 14, which is connected with an electric motor through a belt drive 15

sixteen.

The tension spring 7 is fixed at one end on the frame, while the other is rigidly connected to the knife 1 for forcefully closing the double projections 8 and 9 of the same profile, located on the back side of the knife, with two roller stops 10 and 11 mounted on the bed guides.

In the housing of the knife guides 6, on the inner surface there are vacuum channels 17 connected to a compressor (not shown) for suctioning air from the cutting zone.

The device works as follows.

The packs of book blocks 18 are moved by the feed mechanism towards the knife 1, which makes a complex plane-parallel movement by means of a crank-lever mechanism connected to an electric drive, and two profile protrusions 8 and 9, interacting

with roller stops 10 and 11. During the knife stroke, through the incandescent 17 vertical guides 6, air is sucked from the cutting zone, ensuring reliable pressing of the sheets to be cut to the cutting tool.

When the knife is inserted into the mass of the block, its cut parts move in different directions relative to the clamps A and 5. The movement of the cut parts of the book block is limited by the surfaces of the guides 2 and 3 of the feed mechanism.

Claims (1)

Apparatus of the Invention A device for cutting book blocks into equal parts, comprising vertical guides mounted on a frame, having a curved outer surface for orienting blocks and an inner surface in which a flat knife is installed, having a pair of identical profiles on its back side, interacting with corresponding stationary roller stops, a knife moving mechanism including a connecting rod connected to a drive crank, a block feeding mechanism for example the blade includes two pairs of clamps and two divergent rails symmetrically located relative to the plane of movement of the knife, characterized in that, in order to improve the quality of cutting by providing reliable clamping of the cut sheets to the cutting tool, vacuum channels are made from the inner surface of the knife guides to clamp the web in the cutting area. Fy FIG 2