JPH11180635A - Belt decelerating mechanism of chopper folder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve appropriate and high-quality chopper folder in relation to the change of the thickness, the quality and the number of signatures and also to enable improvement of folding accuracy and high-speed processing. SOLUTION: In a belt decelerating mechanism of a chopper folder, a folded signature is conveyed to the specified position between a chopper blade and a chopper table by a belt conveying means, and chopper-folding is sequentially performed. In this case, in the belt conveying means, a folded signature 18 is pinched on the upper and lower parts by main conveying belts 24a, 24b, a stopper 28 to be brought into contact with the tip of the signature to be conveyed to the specified positions of the main conveying belts 24a, 24b and for stopping it is provided, and decelerating belts 32a, 32b for decreasing the transfer speed of the signature to be belt-conveyed by the main conveying belts 24a, 24b are provided on the main conveying belts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chopper folding apparatus used in an offset rotary printing press or the like, and more particularly to a chopper which applies a brake to a signature which is transported at high speed from a folding cylinder to a chopper by a transport belt. The present invention relates to a speed reduction mechanism of the transport belt for stopping at a predetermined position where folding is performed.

[0002]

2. Description of the Related Art Conventionally, books mounted on rotary printing presses such as offset rotary printing presses and gravure rotary printing presses,
As other folding machines for publishing, chopper folding devices are widely used.

However, the conventional chopper folding apparatus, as shown in FIG. 3, for example, continuously folds a printed web 10 vertically through a former 11, and
2. After passing through the nipping roller 13, the horizontal sewing machine 14, and the vertical sewing machine 15, the signature 18 is formed by cutting the blade 16a of the cutting cylinder 16 in the horizontal direction. Next, while holding the signature 18 with the needle 20a of the plunging cylinder 20,
It is sent out to the biting cylinder 22, and when the plunging spatula of the plunging cylinder 20 matches the biting claw 22 a of the biting cylinder 22, the plunging spatula is protruded and the signature 18 is cut by the biting claw 22 a. By biting the central position in the sending direction, the signature 18 is bitten-folded (horizontal folding in a direction perpendicular to the sending direction). Then, the signature 18 folded and bitten is transported to the position of the chopper blade 26 of the chopper folding device that performs chopper folding by the transport belts 24a and 24b as belt transport means.

In the conventional chopper folding apparatus constructed as described above, the position of the chopper blade 26 is set so that the signature 18 conveyed at a high speed by the conveyor belts 24a and 24b is positioned at a predetermined position where proper chopper folding is performed. And the signature 18 on the conveyor belts 24a and 24b.
Is provided.

In the chopper folding device,
When chopper folding is performed, the transport belts 24a,
4b is folded on a chopper table by a chopper blade 26 which moves up and down, and the folded signature is placed between a pair of chopper rollers 30 provided on the lower side of the chopper table. The paper is passed between the rollers 30 and 30 so that the paper is discharged to a paper discharging means provided below the chopper rollers 30 and 30. The transport belts 24a and 24b are configured to perform a transport operation by transport belt driving rollers 25 and 25 and a plurality of transport belt idler rollers 27 and 27, respectively.

[0006]

However, in the above-mentioned prior art, since the signature 18 conveyed at a high speed collides with the stopper 28, there is a problem that the possibility that the signature is damaged or torn is increased. . For this reason, conventionally, a contrivance has been made such that a deceleration brush means 29 is provided close to the position where the stopper 28 of the transport belts 24a and 24b is provided, and a braking action is applied to the signature.

However, according to such a brush means, the contact area with the signature is small or the brush is weak, so that not only a sufficient braking effect cannot be exerted, but also an appropriate braking effect. It was also difficult to adjust to obtain.

The inventor of the present invention has conducted intensive studies and, as a result, has conveyed the folded signature to a predetermined position between the chopper blade and the chopper table by belt conveying means, and sequentially performs chopper folding. At this time, the belt transporting means is configured to transport the signature folded in the body by being sandwiched by the main transport belt on the upper and lower sides, respectively, and the tip of the signature transported to a predetermined position of the main transport belt. By providing a stopper for stopping the abutment, and by additionally providing a deceleration belt for reducing the transfer speed of the signature transported to the main transport belt by the belt,
It has been ascertained that the signature can be quickly and reliably stopped at a predetermined position where chopper folding is performed.

Therefore, an object of the present invention is to always achieve proper and high-quality chopper folding even with changes in the sheet thickness, paper quality, number of pages, etc. of the signature, and to improve the folding accuracy and to perform high-speed processing. It is an object of the present invention to provide a belt reduction mechanism of a chopper folding device which enables the following.

[0010]

In order to achieve the above object, a belt speed reduction mechanism of a chopper folding device according to the present invention is provided in which a folded body signature is placed at a predetermined position between a chopper blade and a chopper table. In a chopper folding device configured to sequentially carry out chopper folding by carrying means by carrying means, the belt carrying means clamps the folded signatures by upper and lower main carrying belts, respectively, and A stopper for stopping the leading end of the signature conveyed to a predetermined position is provided, and a speed reduction belt for reducing the transfer speed of the signature conveyed by the main conveyance belt is used as the main conveyance belt. It is characterized by being attached to

In this case, the speed reduction belt is arranged in parallel with the main transport belt and vertically symmetrically so as to sandwich the signature to be transported by the belt, so that the transport speed is lower than the transport speed of the main transport belt. Can be configured.

The speed reduction belt is alternately arranged adjacent to and parallel to the main transport belt, and the speed reduction ratio with respect to the main transport belt is adjusted according to changes in the thickness, paper quality, number of pages, etc. of the signature. It can be configured to be variably set.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a belt speed reduction mechanism in a chopper folder according to the present invention will be described in detail with reference to the accompanying drawings. For convenience of description, the same components as those of the conventional chopper folder shown in FIG. 3 are denoted by the same reference numerals, and detailed description is omitted.

FIG. 1 shows an overall schematic configuration of a folder including a chopper folder provided with a belt speed reduction mechanism according to the present invention. In this embodiment, the basic configuration of the folder including the chopper folder is the same as that of the conventional apparatus (FIG. 3), and will be described again for ease of understanding.

That is, in FIG. 1, the chopper folding device continuously folds a printed web 10 vertically through a former 11, and then guides a roller 12, a nipping roller 13, a horizontal sewing machine 14, and a vertical sewing machine. 15, the sheet is cut laterally by a blade 16 a of a cutting cylinder 16 to form a signature 18. Next, the signature 18 is sent out to the biting cylinder 22 while being held by the needle 20a of the charging cylinder 20, and the time when the protruding spatula of the charging cylinder 20 and the biting claw 22a of the biting cylinder 22 match. By protruding the plunge spatula and biting the center position of the signature 18 in the sending direction with the biting claw 22a, the folding of the signature 18 (horizontal folding in a direction orthogonal to the sending direction) is performed. Do. Then, the chopper blade 2 of the chopper folding device that performs chopper folding while holding the signature 18 folded and bitten by the main transport belts 24a and 24b as belt transport means.
It is configured to be transported to the position 6.

The chopper folding device having the above-described construction is similar to the conventional device, and is similar to the main transport belts 24a, 24a, 2c.
In order to position the signature 18 conveyed at a high speed by 4b at a predetermined position where proper chopper folding is performed, the main conveyance belt 24a,
A stopper 28 for stopping the signature 18 is provided on 24b. The main transport belts 24a, 24b
Are configured to perform the transfer operation by the respective transport belt drive rollers 25, 25 and the plurality of transport belt idler rollers 27, 27, respectively.

Therefore, in the chopper folding apparatus according to the present embodiment, the main transport belt 24 as a belt transport means for transporting the signature 18 to a predetermined position where chopper folding is performed.
A belt reduction means including reduction belts 32a and 32b extending in parallel with the main transport belts 24a and 24b, respectively, is provided at a position before the stopper 28 with respect to the stoppers a and 24b.

The reduction belt 3 as the belt reduction means
As shown in FIG. 2, for example, as shown in FIG. 2, the main conveyor belts 24a, 24b are arranged alternately adjacent to and parallel to each other and vertically symmetrically.
And the signature 18. The deceleration belts 32a and 32b are configured to perform a transfer operation by deceleration belt drive rollers 33 and 33 and a plurality of deceleration belt idler rollers 35 and 35, respectively. And the speed reduction belts 32a, 3
2b is driven by a driving device (not shown), and is configured to transfer at a speed lower than the transfer speed of the main transport belts 24a and 24b. In this case, the deceleration belts 32a, 3
2b is configured so that the transfer speed ratio between the main transport belts 24a and 24b can be variably set in accordance with changes in the sheet thickness, paper quality, number of pages, and the like.

Accordingly, in the chopper folding apparatus according to the present embodiment, the signature 18 folded by the biting cylinder is conveyed by the main conveying belts 24a and 24b and chopper-folded at a predetermined position. , The deceleration belts 32a and 32b as deceleration means
Accordingly, the stopper 28 can be brought into contact with the stopper 28 while receiving an appropriate deceleration action. As described above, according to the chopper folding apparatus of the present embodiment, the signature can always be subjected to the appropriate deceleration action, so that the signature does not collide with the stopper 28 and is not damaged or broken. Can be achieved, the folding accuracy can be improved, and high-speed processing can be performed.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and many design changes can be made without departing from the spirit of the present invention.

[0021]

As described above, the belt speed reduction mechanism of the chopper folding device according to the present invention conveys the folded signature to a predetermined position between the chopper blade and the chopper table by the belt conveying means. In a chopper folding device configured to sequentially perform chopper folding,
The belt conveying means clamps the folded signatures on the upper and lower sides by a main conveying belt and provides a stopper for stopping the leading end of the signature conveyed to a predetermined position of the main conveying belt. The speed of the signatures conveyed by the main conveyor belt is reduced by a speed reduction belt for reducing the transfer speed of the signatures. Has many advantages, such as always achieving proper and high-quality chopper folding, improving the folding accuracy, enabling high-speed processing, and significantly improving the efficiency of printing work. .

[Brief description of the drawings]

FIG. 1 is an overall schematic configuration diagram of a chopper folder, showing an embodiment of a belt speed reduction mechanism of a chopper folder according to the present invention.

FIG. 2 is a schematic plan view showing an example of the configuration and arrangement of a conveyance belt and a reduction belt of a signature in the chopper folding device shown in FIG. 1;

FIG. 3 is an overall schematic configuration diagram of a conventional chopper folder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Web 11 Former 12 Induction roller 13 Nipping roller 14 Horizontal sewing machine 15 Vertical sewing machine 16 Cutting cylinder 16a Cutting blade 18 Signature 20 Lever cylinder 20a Needle 22 Biting cylinder 22a Biting claw 24a, 24b Main transport belt 25 Main transport belt Drive roller 26 chopper blade 27 idler roller for main transport belt 28 stopper 30, 30 chopper roller 32a, 32b reduction belt 33 drive roller for reduction belt 35 idler roller for reduction belt

Claims (3)

[Claims] 1. A chopper folding device configured to convey a folded body signature to a predetermined position between a chopper blade and a chopper table by belt conveying means and sequentially perform chopper folding. The means is provided with a stopper for holding the folded signature in the upper and lower sides by the main transport belt and stopping the leading end of the signature transported to a predetermined position of the main transport belt, A belt speed reduction mechanism for a chopper folding device, wherein a speed reduction belt for reducing the transfer speed of signatures conveyed by the main conveyance belt is provided along with the main conveyance belt. 2. The speed reduction belt is arranged in parallel with the main conveyance belt and vertically symmetrically so as to sandwich a signature to be conveyed by the belt, and is conveyed at a speed lower than the conveyance speed of the main conveyance belt. The belt reduction mechanism of the chopper folder according to claim 1, wherein: 3. A speed reduction belt is alternately arranged adjacent to and parallel to the main transport belt, and a transfer speed ratio with respect to the main transport belt is varied in accordance with a change in the signature thickness, paper quality, number of pages, and the like. The belt reduction mechanism of the chopper folding device according to claim 1 or 2, wherein the belt speed reduction mechanism is configured to be able to be set to: