JPH0339947B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention provides a method in which at least one crease gripper body having at least two crease grippers is provided with a folding blade body having at least one folding blade.
A folded product having horizontal creases is formed from the horizontally cut product, and a shearing blade provided on the crease gripper body in the range between the crease gripper nails is attached to the crease gripper nail together with a mating blade provided on the cutting cylinder. The present invention relates to a folding device for producing a folded product, in which the opposite edge of the folded product whose fold edge is held is cut off, and a pushing-off tongue piece pushes the folded product away from an opened fold gripping claw.

[Conventional technology]

In known devices of this kind, the pushing-off tabs are mounted fixedly in the direction of rotation outside the corresponding fold jaw barrel. Since the shearing blade projects slightly from the periphery of the crease gripping claw barrel, the release tongue that engages the crease gripping claw barrel cannot be provided on this shearing blade, as in folding devices having only one crease gripping claw barrel. If so, each time it passes a shearing blade, the end that fits into the crease gripper must be pushed away from the passing shearing blade to prevent collision between the pushing-off tongue and the passing shearing blade. If the product to be removed by the crease gripper is transferred to the belt guide in the area of the push-off tongue, the push-off tongue presses the product onto the upper belt of the belt guide, which rests on the crease claw body; or may compress strongly between the kneading belts, thereby damaging the folded product or smearing the new print. Furthermore, due to the clamping effect produced by the push-off tabs, the folded products are not transported in an orderly manner, which leads to an irregular flow of the products and can therefore lead to disturbances in the processing equipment installed later. However, a quite common disadvantage of fixed release tabs is that the leading edge of the product, which is moved at the speed of the crease jaw barrel, runs onto the fixed release tab during release and rubs along it. As a result, the final paper and usually still fresh prints are subjected to very strong mechanical stress and are therefore also subject to strong damage, which increases the production of print waste.

Instead of a controlled release tab, attempts have already been made to provide a release gripper on the gripper barrel that adjoins the crease gripper barrel. However, the use of additional gripper barrels is not only very expensive;
The creases make it very difficult to access the nail body,
This can be particularly problematic when adjusting shear blades and the like. This type of device is therefore not easy to operate.

[Problem to be solved by the invention]

Starting from this, the object of the invention is to ensure, in a simple and therefore inexpensive manner, a non-damaging handling of the folded product when it is being pushed away, and not only to avoid staining the printed image, but also to ensure that the folded product is not pushed away. It is an object of the present invention to provide a folding device of the first type, which also ensures a reliable and uniform evacuation of the products to be removed, which also provides good access to the mechanisms to be adjusted and which is easy to operate.

[Means to solve the problem]

In order to solve this problem, according to the present invention, at least one guide base fixedly provided in a region close to the circumference of the crease gripper claw barrel extends substantially tangentially to the circumference of the crease gripper claw barrel, and It has a support surface through which the folded product pushed away from the crease gripping claw by the pushing-off tongue is delivered from the crease-holding claw body, and the pushing-off tongue is movably supported on the crease-holding claw body within the range of the folding claw; Each time the crease gripper body rotates and passes by the guide platform, it is operated by the control device to push the folded product away from the opened crease gripper.

〔Effect of the invention〕

In this case, since the pushing-off tongue is provided on the crease gripping claw body with the crease gripping claw, it has the same speed as the folded product to be pushed away from the crease gripping claw. There is almost no relative movement between and the folded product,
This prevents damage to the product and printed image. The released product is transferred to a fixed guide, which ensures reliable guidance and at the same time makes it possible to maintain sufficient free space for the shearing blade to pass through without hindrance. These shearing blades can therefore be arranged on the last crease jaw barrel in the direction of motion, and this naturally also applies if only one crease jaw barrel is provided. The measure according to the invention is therefore particularly advantageously used in folding machines for producing products that are cross-folded once and have edge bleeds parallel to the cross-fold. For example, when transferring the product to a belt guide device leading to a device for producing a second longitudinal fold, the fixed guide platform ensures a constant distance between the guide support surface and the belt moving over it. Ru. However, the upper belt, which moves above the guide platform, rests well on the folding jaw cylinder, so that a reliable retraction of the product into the belt guide is ensured. Furthermore, the fixed guide requires relatively little space, so that access to the crease and the claw barrel is virtually unobstructed.

[Embodiment]

According to another advantageous measure, the guide stand or guides are wedge-shaped and thinned on the side of the claw body on the side of the crease. This ensures sufficient stability, even though the support surface of the guide platform can extend as far as the cylinder surface.

According to a suitable design, it is possible for the guide base or guides to consist of a plurality of guide tabs arranged laterally at a distance from one another. These guiding tongues can engage like rake with the pushing-off tongues which are supported on the folding jaw barrel and moved past the tongues, thereby ensuring a trouble-free introduction of the product into the belt guiding device. is guaranteed.

According to another embodiment of the present invention, in the range of each crease gripper claw, there is provided a push-off bar having a plurality of push-off tongues distributed over the entire length of the crease claw body, and the push-off piece is provided in the range of each crease gripper claw, and the push-off piece is provided with a plurality of push-off tongues distributed over the entire length of the crease gripper claw body. It can be placed in front of the crease and the nail. The push-off tongue, whose rear end engages in the direction of rotation under the folded product held in the folding jaws, is in this case advantageously pulled past the guide platform, thereby increasing the reliability of its operation. have a favorable influence.

According to another advantageous development of the invention, the push-off bar is pivotably supported on a lateral flange of the crease gripper barrel and is connected to a pivot lever outside this flange, which The lever is equipped with a scanning mechanism that scans a cam fixed to the pedestal. This measure results in a particularly simple and very robust construction.

According to a development of this measure, the cam is displaceable around the axis of the crease jaw barrel. This measure makes it possible to operate the push-off tabs in different positions, so that alternately operable delivery devices can be provided.

〔Example〕

Another suitable development and advantageous measure of the invention is
BRIEF DESCRIPTION OF THE DRAWINGS FIG.

The folding device shown in FIG. 1 has a crease gripper body 1 with two crease grippers 2 adjoining a folding blade body 4 with one folding blade 3, which folding blade body 4 is used for horizontal cutting. Cutting cylinder 5 to form the device
interact with. The cutting cylinder 5 has a cutting blade 6 which cooperates with a cutting groove 7 provided in the folding blade cylinder 4. The web 8 entering the cross-cutting device is
A former 9 is passed through the former to form a first longitudinal crease, resulting in a folded product, the tip of which is held by a needle 10 provided on the folding blade body 4 and acting after the cutting groove 7 in the direction of rotation. be done. Folding blade body 4
In the area of contact with the crease gripper body 1, the folding blade 3 forms transverse folds on the folded product while it is transferred to the opposite crease gripper 2 of the crease gripper body 1. The product that has been horizontally folded once is taken up by the crease gripper cylinder 1 and inserted into the impeller 11 provided below the crease gripper cylinder 1 as a so-called tabloid product, or passed through the belt guide device 12 and then The paper is supplied to a chopper folding device 13 which forms two vertical folds.

The transverse cut performed by the joint action of the cutting blade 6 and the cutting groove 7 is usually in the form of a saw blade cut.
Furthermore, the needle 10 leaves a puncture hole in the area of the front edge of the signature. Therefore, it is often desirable to remove the trailing edge of the product by a clean edge bleed after cross-folding. For this purpose, the crease gripper barrel 1 has a shearing blade 14 in the area between its crease gripper claws 2, which is provided in contact with the crease gripper barrel 1 and after the folding blade barrel 4 in the direction of rotation of the crease gripper barrel 1. A mating blade 1 provided on the cutting cylinder 15
It works together with 6. The shearing blade 14 and the corresponding mating blade 16 cut off the rear end of the folded product whose crease edge is held by the crease gripper 2 located in front in the direction of rotation. The cut pieces of paper are held on the cutting cylinder 15, for example by means of a needle arranged after the mating blade 16, and are subsequently sucked out from this. For this reason, the cutting cylinder 15 enters the suction passage 17 which receives negative pressure.

In the inlet region of the belt guide device 12 and in the region between the fold jaw cylinder 1 and the following impeller 11, there is in each case a guide stand 18 fixedly attached to the frame wall, the support surface of which 19 is oriented substantially tangentially to the circumference of the crease jaw cylinder 1. When passing one side of the guide table 18, the crease gripping claw 2 of the gripping claw body 1
will be opened automatically. Open crease claw 2
A plurality of push-off tongues 20 are provided on the crease gripper body 1 in the range of each crease gripper 2 in order to push the folded product away from the folded product, the ends of which are inserted into the corresponding crease gripper 2. When passing through the guide table 18, the product is pushed away from the crease gripper 2 and delivered to the guide table 18.
The guide stand 18 is formed by a plurality of tongue pieces arranged horizontally at intervals from each other, and these tongue pieces are pushed apart to form the tongue piece 2.
It is preferable to provide the push-off tongue piece 20 laterally shifted from the guide base 18, so that in the operating state, for example, the push-off tongue piece 20, which assumes the position shown by the broken line in FIG. Therefore, the information platform 18
It is possible to reliably deliver folded products to customers. The end of the guide stand 18 on the side of the crease gripper cylinder is spaced from the periphery of the crease gripper cylinder 1 such that the shearing blade 14 slightly protruding from the periphery can pass through without being hindered. In the illustrated embodiment, the guide platform 18 is wedge-shaped and thinner on the side of the crease gripper cylinder, so that the required distance from the crease gripper cylinder 1 is reduced.

Belt guide device 1 leading to chopper folding device 13
2 is made up of an upper belt 21 and a lower belt 22. The upper belt 21 is in sufficient contact with the claw cylinder 1 in addition to the crease, and is inserted into the entrance of the belt guide device 12 with a small distance equal to the distance between the belt sides facing each other of the upper belt 21 and the lower belt 22 and equal to the thickness of the product. It passes over the support surface 19 of the provided guide stand 18. On the extension surface of the support surface 19 of the guide stand 18 provided at the entrance of the belt guide device 12, there is a lower belt 2 which is shorter than the upper belt 21.
2 is provided. The belt of the belt guide device 12 moves at a speed equal to the circumferential speed of the crease jaw cylinder 1.

The end of the pushing-off tongue 20, which in each case engages with the product to be pushed away, has essentially the same speed as the belt of the belt guide device 12 in the operating state shown in broken lines in FIG. When the product pushed away from the crease gripper 2 by these tongues 20 is transferred to the belt guide device 12, no relative speed occurs between the product drawn into the belt guide 12 and the push-off tongues 20. The same holds true for the push-off process. This is because the pushing-off tongue piece 20 is provided on the crease gripping claw body 1, so that the pushing-off tongue piece 20 is fixedly arranged in the rotation direction with respect to the product that is fitted into the crease gripping claw 2 each time. Because it will be.

A pressure roller 23 is provided above the guide stand 18 attached to the impeller 11 to prevent the end of the product whose leading edge is riding on the guide stand 18 attached to the impeller 11 from jumping up. The corresponding crease ensures reliable transportation of this product, which has already been released from the gripper 2.

In order to support the pushing-off tongues 20, which are distributed evenly over almost the whole of the crease gripper 2, in the area of each crease gripper, there are provided grooves extending over the entire length of the crease gripper body 1 and A swingably supported push-off bar 24 is provided, on which the individual push-off tongues 20 are removably mounted, for example by screws. The crease gripper 2, i.e. its fixed stopper bar and its swingable oscillating bar, have a plurality of interruptions in the axial range of the pushing-off tongue 20 over their entire length; The release tongues 20 can be engaged in the inactive position shown in FIG. The pushing-off tongue piece 20 can be easily formed by a curved line or a curved plate, and can be curved according to the roundness of the crease jaw body 1 that supports it. Push-off piece 2
4 is a corresponding crease gripping claw 2 in the rotation direction.
It is set in front of. Therefore, the push-off tongue piece 2
0's rear end in the direction of rotation engages in the interruption of the associated crease gripper 2. The end of the pushing-off tongue 20, which in each case engages under the product to be pushed away, is pulled past the guide platform 18 onto which the product is transferred, so that it can be moved radially without any obstruction. Pushed back inward.

As can be clearly seen in FIG. 2, the push-off bar piece 24 is swingably supported by a side flange 26 that fits onto the shaft 25 of the crease jaw body 1. One end of the push-off piece 24 extends beyond the attached swing bearing, and is provided with a swinging lever 27 that is attached to this piece 24 so as not to rotate relative to it, and is rotatably supported on this swinging lever 27. scanning roller 28
is guided along a cam 29 having a profile that moves the release tongue 20 in the desired position. A ring 30 integrally formed with the cam 29 is fixedly attached to the crease jaw barrel 1 rotatably supported on the adjacent side wall 31 of the frame. The cam 29 corresponding to the push-off tongue 20 is designed here as an inner cam. The control of the crease gripper 2 is likewise carried out in a similar manner by means of a cam, which in this case can be designed as an outer cam. The cam attached to the crease gripping claw 2 is a ring 30 as an outer cam 32 facing the cam 29.
can be formed in one piece, which results in a particularly compact construction.

As in the illustrated embodiment, when the horizontally folded product is to be taken out from the crease gripping claw body 1 within the range of the various guide tables 18, the crease gripping claw 2 and the associated pushing-off tongue piece 20 are must be operated at different surrounding locations. For this purpose, in the embodiment shown, a ring 30 with cams 29 and 32 is arranged rotatably about the axis 25 of the crease gripper cylinder 1. Therefore, the ring 30 is 3
It is provided with an arcuate guide slit as shown at 3, and a guide pin fixed to the frame is fitted into this slit. For this purpose, in the illustrated embodiment, a guide piece 34 is provided which fits into the guide slot 33, as can be further seen in FIG. It has a screw hole that fits. After loosening the retaining screw 35, the rear ring 30 can be brought to the desired rotational position. Therefore, the ring 30 has a blind hole 36, and the ring 30 has a blind hole 36.
This blind hole 3 is where the adjustment rod that can easily turn 0 is inserted.
It can be inserted into 6. In order to ensure rapid and precise adjustment of the ring 30, suitable markings 31 can be provided in the area of the opposite sides of the cradle side walls 31, which markings can correspond to the points 38 formed on the ring 30.

Although preferred embodiments of the present invention have been described above, this is not intended to be limiting. Rather, a person skilled in the art can adapt the general idea of the invention to the individual conditions.

[Brief explanation of the drawing]

1 is a side view of a folding device according to the invention with a belt guiding device leading to the folding device and an impeller capable of receiving products in its place; FIG.
The figure is a sectional view through the axis of the crease gripper barrel with the support and control device for the release tongue. 1... Crease gripping claw body, 2... Crease gripping claw, 3... Folding blade, 4... Folding blade body, 14... Shearing blade, 16... Matching blade, 18... Guide stand, 19
...Supporting surface, 20...Pushing tongue piece.

Claims (1)

[Claims] 1. At least one crease gripper body 1 with at least two crease grippers 2 together with a folding blade cylinder 4 with at least one folding blade 3,
A folded product having horizontal creases is formed from the horizontally cut product, and a shearing blade 14 is provided on the crease gripping claw body 1 in the range between the crease gripping claws 2.
However, together with the mating blade 16 provided on the cutting cylinder 15,
The opposite edge of the folded product whose crease edge is held by the crease gripping claw 2 is cut off, and the push-off tongue piece 20 is cut off.
However, in a device for pushing the folded product away from the opened crease gripper claw 2, at least one guide stand 18 fixedly provided in a range close to the periphery of the crease gripper barrel 1 is provided. It has a support surface 19 which extends substantially tangentially to the folding tab 20 and which transfers the folded product pushed away from the crease gripping claw 2 from the crease gripping claw body 1 by the pushing-off tongue piece 20, and the pushing-off tongue piece 20 holds the folded product. movably supported by the claw body 1 in the area of the claw 2;
And along with the rotation of the crease gripping claw body 1, the guide table 18
A folding device for producing folded products, characterized in that the folding device for producing folded products is operated by control devices 28, 29 to push the folded products away from the opened crease grippers 2 each time it passes by. 2. The folding device according to claim 1, wherein the guide platform 18 is thinned in a wedge shape on the side of the crease and the claw body. 3. A folding device according to claim 1 or 2, characterized in that the guide platform 18 is made up of a plurality of guide tongues arranged laterally at a distance from each other. 4 In the range of the crease gripping claw 2, a plurality of release tongues 20 are uniformly distributed over the entire length of the crease gripping claw body 1, and are fixed to a release bar piece 24 extending over the entire length of the crease gripping claw body 1. A folding device according to claim 1, characterized in that: 5 A pushing piece 24 is provided at the front in the rotational direction of the crease gripping claw 2, and the rear end in the rotational direction of the pushing away tongue piece 20 attached to this piece is held by the corresponding crease gripping claw 2. Claim 4, characterized in that it engages under the product.
Folding device as described in Section. 6. The push-off piece 24 is swingably supported by the side flange 26 of the crease jaw body, and connected to a swinging lever 27 outside this flange, and this swinging lever 27 is fixedly provided on the frame. 6. The folding device according to claim 4, further comprising a scanning mechanism for scanning the cam 29 of the control device. 7. Folding device according to claim 6, characterized in that the cam 29 is constructed as an internal cam. 8. A patent characterized in that a plurality of guides 18 which can act alternately are provided, and the cam 29 is displaceable around the axis of the crease jaw barrel 1 by an angle corresponding to the mutual spacing of the guides 18. Folding device according to one of claims 1 to 3. 9 The cam 29 is attached to the ring 30, and the cam 29 is attached to the ring 30.
Claim 8, characterized in that the guide pin has an arcuate guide slit 33 through which the guide pin passes.
Folding device as described in Section. 10. The folding device according to claim 9, characterized in that a guide piece 34 is guided in the guide slit 33, and a holding screw 35 is fitted into this guide piece 34. 11. Folding device according to claim 9, characterized in that the ring 30 on which the cam 29 is attached has in the area of its outer circumference a device for connecting an operating tool. 12. The folding device according to claim 6, wherein the cam 29 attached to the pushing-off tongue piece 20 and the cam 32 attached to the crease gripping claw 2 are formed on the same holding member. 13 Upper belt 21 after the crease jaw body 1
and a belt guide device 12 with a lower belt 22
A device 1 for forming a second longitudinal fold
3, characterized in that the upper belt 21 of this guide device rests on the fold jaw cylinder 1, and the lower belt 22 is provided on the extension surface of the fixed guide stand 18. Folding device as described in Section. 14. A press roller 23 in contact with the crease gripper cylinder 1 is provided in front of the guide stand 18 attached to at least one impeller 11 that can directly receive the product from the crease gripper cylinder 1. , a folding device according to claim 1.