SU827324A1 - Device for rounding book spines - Google Patents

Description

one

The invention relates to printing production and can be used in machines for laminating the backs of book blocks.

A device for laminating backs of book blocks is known, comprising a mechanism for clamping a book block, a profile backing block, a lifting plate, a block leading mechanism to the spine of the block, a pad swing mechanism and an arcuate block guide "ni lifting the kashirroval block with a cam mechanism ensures that it is pressed against the spine block great effort. The swinging movement of the pad, carried out with the aid of a crank mechanism, ensures the folding of the folds of the notebooks and the corresponding formation of the spine of the block. This device is characterized by insufficient folding of the folds and instability of the shape of the spine of the block.

This is explained as follows.

With each cycle of swinging a kashirovanny pad, its front part, in the course of its swing, bends the folds of the corresponding half of the roots of notebooks outwards, and the back has a detrimental effect on the other half of the root, bending the folds of the notebooks of this half of the root to its middle.

The aim of the invention is to improve the quality of laminating.

This goal is achieved by the fact that in a known laminating device comprising a mechanism for clamping a book block, a profile laminating block, a block leading mechanism to the spine of the block with a lifting plate, a block swing mechanism and an arc-shaped guide for the block, there is also a means for moving the guide including eccentrics mounted on a lift

the plate of the blocking mechanism to the spine of the block, and the drive for periodic rotation of the eccentrics, while the guide is hinged on the eccentrics.

FIG. 1 shows a diagram of the proposed laminating device; in fig. 2-4 show the successive positions of a pads when processing the spine of a block.

The kashiroval device contains the mechanism of clamping the book block 1, clamping the block 2 near its root, the kashiroval block 3 and the mechanisms for lifting it, swinging and additional movement.

The lifting mechanism of the laminating block includes a cam 4, fixed to the main shaft 5, a lever mechanism 6 with a compensating elastic link, lifting the laminating block to the spine of the block 2, and a lifting plate 7.

The swinging mechanism of the laminating block is made in the form of a rocker mechanism comprising a link 8, rigidly connected to the casing block 3, a crank 9 fixed on the shaft 10, which is driven by a mechanical gear, for example, a gear 11 from the main shaft 5, located on the base plate 7 , guides 12 and roller clips 13.

The mechanism that performs the additional movement of the laminating pad 3 includes the eccentrics 14 and 15 located on the rails 12, which rotate the eccentrics, the cams 16 and. 17, mounted on the shaft 10 and lever mechanisms 18 and 19. The eccentric 14 is hinged on the plate 7, and the eccentric, rik 15 ..-. Using the rocker groove.

Kashirovka spine of the book block occurs after lifting the plate 7 and pressing the laminating pad to the spine of the block with the help of a lever mechanism 6, controlled by the cam 4.

When the laminating pad is rocked, its working surface acts on the spine of the block, causing the spine of notebooks to be bent outward from the plane of symmetry of the block.

When swinging a kashirovanny block from the middle position to the outermost direction of the 12 and with it, the pad is shifted due to the rotation of the eccentrics in such a way that the front part of the pad is pressed against the spine of the block more than the back (Fig. 2), so that in the extreme position the greatest pressing the front of the laminating pad against the corresponding half of the spine of the block and the smallest pressing (or no pressing of the back of the block against the other half of the spine of FIG. 3).

At the moment of the change in the swing direction of the laminating pad, there is a sharp rotation of the eccentrics and displacement of the guides 12 in such a way that the front part of the laminating pad (which, when it moves back, becomes rearward) is pressed to the corresponding half

The block's root decreases significantly. Or disappears, while pressing another part of the pad to the second half of the spine reaches a maximum (Fig. 4). Further swinging of a kashirovalny block to an average

The position occurs with a fixed guide 12.

After passing through the middle position block, the cycle is repeated as described above.

The use of the proposed laminating device will improve the quality of laminating by obtaining a more stable and regular shape of the spine of the book block.

Claims (1)

1. USSR author's certificate No. 81815, cl. In 42C 5/02, 1947 (prototype). V uz2 Jif2.5cpuzA 12 /