JPH0530638B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cover press device for a bookbinding machine. This device has side clamping rails and a plate for pressing against the book spine, these rails and plates being optionally adapted to carry out a movement for pressing the cover against the block. The movement can be horizontal or vertical, and it is possible to move synchronously with the transport system of the blocks.

[Prior Art] When a book is bound with adhesive, the cover, which is not yet glued, is tightly glued to the blocks forming the book by means of a cover press device. The cover is then pre-adjusted in a straight line, or often with curved edges, and is pressed against the spine of the block and in adjacent areas on either side of the spine. During this time, the movement of the block occurs continuously without interference. Particularly important with respect to the operation in which the cover is attached and pressed is to give the final good sharp edges to the shape of the spine of the as yet unbound book. It is already known to apply a lateral compression force and a compression force from below simultaneously by means of press plates communicating with side clamping rails towards the spine of the book. In such a device,
It is possible for both to move linearly and over a certain range synchronously with the block transport system.
Details of this type of cover press device are just described, for example, in Swiss Patent No. 626833.

[Problem that the invention seeks to solve]

As is already known, practical experience shows that uncontrolled moments occur in the compressive action of the tool. In that case, the cover, which was previously positioned against the back of the block, would be displaced from the required position. Said displacement occurs in particular if the block exhibits a pronounced mushroom shape, so that its spine is wider than the width between the fold lines predetermined by the folds.
In such cases, the mushroom shape may exhibit an asymmetrical shape, resulting in the cover exhibiting extremely poor alignment with respect to the spine of the block. If the centering of the spine of the block is inaccurate relative to the groove or crease line of the cover, the result is always a reduction in product quality. Due to such simple defects in the spine of a book, the spine of the book may not be finished neatly, the title of the book may be tilted against the spine of the book, there may be creases, etc.
Various other problems may occur.

[Means to solve problems]

The object of the invention is to improve the quality of the general type of book with a view to correctly aligning the cover to the spine of the book block by preventing displacement of the cover during pressing of the cover onto the book block. The purpose is to improve the cover press device.

Therefore, in the cover pressing device of the invention, the side clamping rails are provided with suction means or suction means which hold the cover in an adjusted position relative to the book block spine until the moment when the cover is pressed against the book spine. gripping means, the horizontal movement of the side rails being synchronized with the movement of the plate 3 so that said side clamping rails 4, 5 perform a compensating movement simultaneously with the vertical movement of said plate 3; It is being Preferred embodiments are characterized in the dependent claims.

The pressing device of the invention makes it possible to hold the cover in a fixed position relative to the back of the block so that the cover does not change its position while it is being pressed. Thereby it is possible to fasten the cover in correct registration to the block. Even in the case of covers with a curved edge predefined by the crease line, the exact centering of this edge with respect to the spine of the block is ensured. The cover remains centered at all times. Even if the blocks have a mushroom shape, this will not have any effect on the accuracy of the casing.

〔Example〕

The cover press device essentially consists of a plate 3 which presses against the spine of the book block and side clamps which are placed above the press plate 3 and are movable laterally towards the lateral faces of the block. It is composed of attached rails 4 and 5. As is already known, the plate 3 that presses against the spine of the book
carries out a vertical movement and, over a defined travel distance, a horizontal movement synchronized with the conveying system comprising the block clamping device 2. Meanwhile, at the same time, the side clamping rails 4, 5 move horizontally inward.

The plate 3 pressing against the spine is supported by a transverse carrier 9 which can be moved inside the guide cradle 6 by means of rollers 7,8. For this purpose, a pull lever 10 belonging to the actuating arm 11, which is operated by a desk cam mechanism (not shown), acts on the carrier 9 and causes the transverse carrier 9 to perform a linear movement. The same desk cam mechanism also influences the vertical movement of the guide cradle 6 via control arms 12, 13 which act at their ends. This movement of the actuator is not the subject of the present invention and will not be discussed further here.

The mounting rods 17, 17a are arranged in the lateral carriage 9 that holds them, and the side pieces 1
The supports 16, 16a attached to the rack rods 17, 17a, which together with 5, 15a form a support frame, have the function of supporting the side clamping rails 4, 5 and are free to support these rods. It is allowed to slide. Guide rod 1
Two side pieces 1 supported by 8 and 18a
5, 15a are on the support 16, 16a,
They are immovably fixed to each of the side clamping rails 4, 5. The guide rods 18, 18a and the clamping rails 4, 5 are connected to the support 1.
6, 16a, it is possible to freely slide in the axial direction in the carriage 9 and the side pieces 15, 15a, and the side clamping rails 4, 5 exert a pressing force on the sides of the block. It makes it possible. This pressing force is applied to the fixing ring 1, which is located on the opposite side to the side clamping rails.
9, 19a and compression springs 24, 24a supported by the carriage 9.

The control of the opening and closing movement of the side clamping rails 4, 5 is exercised in parallel with the vertical movement of the carrier 9 in the guide cradle 6 and is controlled by cam tracks 26, 26a located above the guide cradle 6. The cam roller 2 is twisted and positioned and fixed to the guide rods 18, 18a.
5, 25a.

According to the invention, each of the side clamping rails 4, 5 is provided with a hole example 4a, 5a which can be attracted by suction air. The functions of these holes 4a and 5a are as follows: lateral guides 31,
31a to hold the cover 1a precisely adjusted against the back of the block 1, so that it remains in a predetermined position relative to the back of the block until the moment the cover is pressed. The first thing to do is to keep the cover fixed.

The correction flap 32 is used to achieve accurate paper feeding in register. For this purpose, a correction flap 32 is rotatably mounted on the carriage 9 and corrects the cover 1a. When the cover is fed into the block 1, the cam roller 32a belonging to the arm 32b extending from the flap 32 is moved to the cam piece 33 belonging to the guide frame 6 with the aid of a spring element (not shown).
ride on. The spring element then brings the cam roller 32a into contact with the cam piece 33.

As mentioned at the outset, the plate 3 pressing against the back carries out a horizontal movement over its range of movement in synchronism with the clamps 2 of the transport system holding the block, and during this synchronous movement Vertical movements are made with the aim of holding the cover firmly against the back of the block, which is coated with adhesive.
This series of movements is carried out by a cover press device held in the clamps of the transport system and synchronized with successive passing blocks. After the modification has been completed, before the glued back of the block and cover are brought together by the vertical movement of plate 3,
The cover resting on the side clamping rails 4, 5 is held firmly in that position by the suction.

As the vertical rise progresses, the cover is pressed by the blocks entering the space formed by the side clamping rails 4, 5 and the plate 3. In this case, the side clamping rails perform the necessary compensatory movements. Following the course of these movements, the cover
Attaches neatly around the back of the block.
Further progressing, the spine of the block is precisely positioned and pressed into the region of the spine of the cover predetermined by the fold line.

〔Effect of the invention〕

The pressing device according to the invention ensures the fixation of the cover, which is placed in alignment with the spine of the block, so that the cover can be applied in precise register to the spine of the block. Summer. The mushrooming that is inevitable with the production of blocks and the asymmetrical shapes that often occur do not have any influence on the accuracy of the casing action. Once centering is done effectively and once pressure is applied to the back, the side clamping rails 4,
The suction ports 4a, 5a of 5 are closed and the cover can be moved upwards without any hindrance, while the work is necessarily completed under the pressure from the sides.

[Brief explanation of drawings]

Embodiments of the invention are described in more detail by means of the following figures. Fig. 1 is a front view of the present cover press device, Figs. 1a to 1c are views capturing successive moments of the present cover press device, and Fig. 2
The figure is a side view of the present cover press device, and Figure 3 is
FIG. 2 is a view of the present cover press device as seen from direction A in FIG. 1; DESCRIPTION OF SYMBOLS 1... Block, 1a... Cover, 2... Block clamping device, 3... Plate, 4, 5... Side tightening rail, 4a, 5a... Suction means, 6... Guide frame,
7, 8... Roller, 9... Lateral carrier, 10... Tension lever, 11... Actuating arm, 12, 13... Control arm, 15, 15a... Side piece, 16, 16a... Support, 17, 17
a... Shelf rod, 18, 18a... Guide rod, 1
9, 19a... Fixed ring, 24, 24a... Compression spring, 25, 25a... Cam roller, 26, 26a
...Cam orbit, 31, 31a...Side guide, 32...
Correction flap, 32a...Cam roller of correction device, 32b...Arm of correction device, 33...Cam of correction device.

Claims (1)

[Claims] A side clamping rail for applying pressure to one side of the book, and a plate for applying pressure to the spine of the book, the clamping rail and the plate holding the block together. It is possible for the conveying system to move synchronously in order to carry out the movements of pressing the cover facing said blocks, these movements possibly being horizontal as well as vertical. In the cover press device of the bookbinding machine, the side tightening rails 4 and 5 are arranged so that the cover 1a
suction means or gripping means 4a, 5a for holding the cover 1a in an adjusted position relative to the back of the block until the cover 1a is pressed against the back; the horizontal movement of the side clamping rails is Cover press device, characterized in that the side clamping rails 4, 5 are synchronized with the movement of the plate 3 so as to perform a compensating movement simultaneously with the vertical movement of the plate 3. 2. A guide frame 6 that grips the plate 3 that presses toward the back of the block and performs vertical movement.
a lateral carrier 9 that can be moved horizontally within the guide frame 6; and side clamping rails 4, 5 located on the lateral carrier 9; During the horizontal movement of the lateral carriage 9, the movement of the side clamping rails 4,5 towards the block 1 is caused by the movement of the side clamping rails 4,5 on both sides positioned relative to the side clamping rails 4,5. 2. The cover pressing device according to claim 1, wherein the pressing is performed via cam tracks 26, 26a and cam rollers 25, 25a. 3. When the cover 1a is supplied, the transverse carriage 9 has correction devices 32, 32a, 32b, 33 for aligning the supplied cover with respect to the block 1. Second
Cover press device as described in section.