EP1878675A1 - Brush splicing roll - Google Patents

Abstract

The device has a brush roller (4). The external sides of one of bristles (4a) do not protrude radially from the brush roller. The external sides of multiple and preferably all bristles do not run radially with reference to the brush roller. The external sides of the bristles have an angle (alpha) with reference to the radial direction of the brush roller. All bristles or outer areas of the bristles deviates in same orientation from the radial direction of the brush roller. An independent claim is also included for a method for pressing a material web.

Description

The invention relates to a device for pressing a material web with a brush roller and preferably with a brush adhesive roller for pressing the material web, such as a paper web, e.g. on the outer circumference of a supply roll.

Such devices are used in particular, but not exclusively, in processing stations that serve to prepare paper rolls for a flying roll change on a web-fed rotary printing press. In these stations adhesive labels are attached to the web start of the paper web, with which the web start is attached to the circumference of the supply roll. So that the adhesive labels reliably adhere to the peripheral surface, pressing members are used, with which the paper web is pressed against the circumference of the supply roll and smoothed. This means in other words that in these devices the web start is pressed against the outer periphery of the own supply roll.

Furthermore, such pressing devices are also used in gluing stations of reel splicers in order to press the web start of a new printing material web during the flying reel change to an outgoing printing material web.

From the DE 195 40 689 C2 is such a device with Andrückorgan known. The pressing member is formed in the manner of a bristle roller, which is rotatably mounted in a pivot frame. The swing frame in this case has two pivot levers, which are each biased by tension springs to bias in this way the bristle roller and thus to press the bristles with a certain biasing force against the circumference of the paper roll.

From the DE 10 2004 016 687 A1 a device for pressing a material web to the outer periphery of a supply roll with a Andrückorgan is known which has elastically deformable bristles, which can be brought to the material web to the plant. The Andrückorgan has a brush strip.

It is an object of the present invention to propose a device for pressing a material web, which has a low rolling friction and can also be used in standstill bonding.

This object is achieved by a device according to claim 1. Advantageous embodiments will be apparent from the dependent claims.

A device according to the invention for pressing a material web against a body, in particular on an outer circumference of a roll, such as a supply roll, has, according to the invention, a brush roll in which at least the outer sides or the outer region of the bristles, that is to say the radially outer region of the bristles is arranged not radially but at a certain angle α to the radial direction of the brush roller. The bristles themselves can both extend in the radial direction, ie from the center of the bristle roller in a straight extension to the outside, as well as inclined relative to this radial direction by an angle. In the case of a radial arrangement of the bristles, at least the outer bristle sides should be inclined with respect to the radial direction in the unloaded state of the brush roller, that is, without an adjacent web. Preferably, the circumferentially circumferentially arranged bristles of the bristle roller are inclined to the radial direction attached to the brush roller. Alternatively or in combination with inclined bristles, radially extending bristles with straight, curved or angled regions can also be provided on the brush roller body. Preferably, the bristles of the brush roller are arranged so that they are inclined at least with respect to the radially outer bristle portion in the same direction with respect to the radial direction.

Preferably, at least some and advantageously more than 50% or 50-100% of the bristles are arranged obliquely to the radial direction.

Since, according to the invention, instead of a normal brush roller with radially extending bristles, a brush roller with oblique bristles is applied, a bending direction of the bristles when pressing on a material web is predetermined by means of the brush roller. If, for example, a printing material web, for example a paper web, is pressed against the outer circumference of a supply roll, the bristles of the brushing roll according to the invention bend further into the direction already predetermined by the oblique arrangement of the bristles, as shown in FIG Bending direction of the bristles when pressing the rolling friction of the brush roller can be reduced. In particular, bending of the bristles in the same direction can be ensured when a material web resting, for example, relative to the brush roll, so that the pressure exerted by the brush roll on the material web becomes more uniform and thus can be precisely metered.

Preferably, the inclination angle α at which the bristles or the outer regions of the bristles incline toward the radial direction is in a range between 0 and 90 °, and more preferably in a range between 5 and 80 °, such as, for example. 40 °, 45 ° or 50 °.

According to one embodiment, the brush roller is designed so that the angle of inclination of the bristles projecting from the brush roller in the radial direction can be adjusted, which makes it possible, for example, to meter the contact pressure of the brush roller or the brush roller especially for the desired application for pressing a web For example, to configure given speed or given stiffness.

In order to adjust the brush roller in a simple manner between a rest position in which the brush roller does not come to the printing material for engagement, and a working position in which the bristles of the brush roller on the printing material to the system, to adjust, it is particularly advantageous if the Brush roller on a support, in particular on a pivot frame, is attached. By adjusting the carrier, the brush roller can then be made easy from the rest position to the printing material or be brought out of engagement by pivoting back.

In the simplest embodiment of the invention, the brush roller is rotatably mounted on the carrier, so that the pressure between the brush roller and printing material from the Anstellmoment results, with which the carrier has been employed on the printing substrate. An improved embodiment with respect to this rigid mounting of the brush roller results when the brush roller is adjustably mounted on the carrier. This can be done, for example, that the brush roller is pivotally mounted on the pivot frame. By adjusting the relative position between the brush roller and carrier, the geometric arrangement between the brush roller and supply roll, for example, the distance and the angle between the brush roller and supply roll, can be changed to thereby influence the force applied by the brush roller pressing force. As a result, the pressing force can then be changed even after the brush roller has been set, without the need to change the contact torque of the carrier. Thus, the contact pressure is no longer exclusively dependent on the Anstellmoment, but can be influenced by changing the geometric arrangement of the brush roller on the carrier. This results in shorter Anstellzeiten because it can be made for all roller widths with a consistently high Anstellmoment.

It is particularly preferred if the brush roller is detachably fastened to the carrier. For an easy replacement of the brush roller can be realized.

According to a preferred embodiment, a bristle-free contact surface is provided on the brush roller, on which the printing material can be passed adjacent. By this embodiment it can be achieved that the brush roller is adjusted on the carrier until the bristles of the brush roller no longer rest against the printing substrate and the printing substrate instead is guided only by the bristle-free contact surface. As a result, the contact pressure can be completely removed as a result, without the carrier of the brush roller must be turned off in the rest position.

The bristles of the brush roll should preferably be made of a material having a low coefficient of friction, for example in the manner of Chinese bristles, or have a non-stick coating. This makes it possible that the web tension of the engaging substrate web is increased only very slightly despite the lack of relative movement between the brush roller and printing material.

According to a further preferred embodiment, the brush roller is elastically deformable along its longitudinal axis or has along its longitudinal axis at least two sections which are independently adjustable. By means of this embodiment, it can be achieved that the brush roller in the active zone can specifically adapt to local irregularities. Optionally, by this additional travel, which corresponds to the deformability of the brush roller or the bearing clearance of the brush roller sections in the storage, a different adjustable storage of the brush roller can be saved.

To realize the elastic deformability, the brush roller may be formed in the manner of an elastically deformable plastic sleeve or a plastic cylinder, on which preferably the deformable bristles extending obliquely to the radial direction are embedded or formed.

For storage of the elastically deformable brush roller or the various brush roller sections on the carrier, a guide bar can be used, in which the brush roller or brush roller sections is held movable.

In order to ensure a sufficient pressing force of the Andrückorgans regardless of the specific shape of the outer circumference along the active zone throughout the active zone, at least one spring memory can be provided between the guide rail and brush roller, with which the brush roller is resiliently biased to the guide rail. According to a preferred embodiment, the spring accumulator should extend in sections or continuously over the entire length of the effective zone, so that the prestressing force applied by the spring accumulator can likewise be adapted specifically to the different requirements in the different regions of the effective zone.

According to a first, preferred embodiment, the spring accumulator may be designed in the manner of a hose which can be acted upon by a pressure medium, in particular by compressed air.

Alternatively, coil springs can be used as a spring store, each biasing a certain portion of the guide bar with a specific biasing force.

In order to be able to specifically adapt the pretensioning force along the zone of action, an adjusting device can be provided on the pressing element with which the pretensioning of the brushing roller can be adjusted. The adjusting device may be formed, for example, in the manner of adjusting screws, which are each associated with a coil spring, wherein by screwing in or unscrewing the screws, the respective bias of the coil spring is adjusted according to the available spring travel.

The device may ultimately be part of any systems for processing webs, e.g. B. printing material, in particular paper webs. Particularly preferred is the use of the device in paper roll preparation stations, with which the splices at the web start of a supply roll, for. B. paper roll or in gluing stations in a reel changer, which serves the flying reel change, for example on a web-fed rotary printing press.

Figur 1

Eine erfindungsgemäße Bürstenwalze beim Andrücken einer Materialbahn gegen eine Rolle;

Figur 2

Eine bekannte Borstenwalze im Stillstand;

Figur 3

Eine bekannte sich drehende Borstenwalze; und

Figur 4

Eine erfindungsgemäße Borstenwalze mit einstellbarem Neigungswinkel der Borsten.

The invention will be described below with reference to preferred embodiments. Show it:

FIG. 1

A brush roller according to the invention when pressing a web against a roll;

FIG. 2

A known bristle roller at a standstill;

FIG. 3

A known rotating bristle roller; and

FIG. 4

A bristle roller according to the invention with an adjustable inclination angle of the bristles.

Figure 1 shows a brush roller 4 according to the invention with circumferential bristles 4a, which are each inclined at the angle α or smaller deviations thereof against the radial direction of the brush roller 4. The inclination of the bristles 4a against the radial direction is in the embodiment shown in Figure 1 in the clockwise direction and thus against the circulation direction of the brush roller 4 shown by the arrow counterclockwise.

The counterclockwise rotating brush roller 4 pushes with its inclined bristles 4a against a passing material web 3, which may be, for example, a running printing material web or an end of a paper web of the supply roll 2. This material web 3 is of the bristles 4a of Brush roller 4 pressed against the supply roll 2, connected to the upper material web of the supply roll 2 and then severed by means of the cutting blade 5.

Devices for connecting two webs of material are known in the art, for example from DE 10 058 436 B4 , of the DE 10 058 437 B4 and the DE 10 058 458 B4 The teachings of the construction of devices for connecting two webs of material are incorporated in this application.

As can be seen from FIG. 1, the bristles 4a continue to bend in the direction predetermined by the pretilt angle α as soon as they come into contact with an object to be pressed, such as the material web 3. Since the bristles 4 a thus bent counter to the direction of rotation of the brush roller 4 can be guided more easily over the material web 3 than in the case of a bending of the bristles 4 a in the opposite direction, the friction of the brush roller 4 can be reduced.

If, instead of the brush roller 4 according to the invention shown in FIG. 1, a brush roller 4 known from the prior art was used, as shown in FIGS. 2 and 3, a bending of the radially protruding bristles 4a results in both directions upon contact with the material web 3 at a standstill of the bristle roller 4, as shown in Figure 2, in the standstill bonding leads to problems, since no uniform pressure is exerted on the web 3 of the brush roller 4.

If the material web 3 is pressed by a rotating brush roller 4 against the supply roll 2, as shown in Figure 3, it results due to the non-oriented bristles 4a and depending on the relative speed between the web 3 and the brush roller 4, an undefined bending of Bristles 4a, which can be bent depending on the application conditions in both directions and can bend, for example, during the system on the material web 3 in an opposite direction. As a result, the generated in the contact area between the bristles 4 a and the material web 3 Pressure force undefined and it can lead to increased friction between the material web 3 and the brush roller 4.

Figure 4 shows an embodiment of a brush roller 4 according to the invention with bristles 4a, which can be adjusted with respect to their inclination angle α with respect to the radial direction. In this case, the brush roller 4, a brush roller inner body 4c and a brush roller outer body 4b, which are connected to the bristles 4a or the bristles 4a can lead at least slidably. For example, the bristles may be firmly attached to the brush roller inner body 4c and guided through a plurality of openings 4d in the brush roller outer body 4b. If the brush roller inner body 4c is rotated relative to the brush roller outer body 4b, the outer regions of the bristles 4a incline, which can be adjusted as a function of the relative rotation between the brush roller inner body 4c and the brush roller outer body 4b.

reference numeral

1

Device for pressing a material web

2

paper roll

3

web

4

brush roll

4a

bristles

4b

Brush roller outer body

4c

Brush roller inner body

4d

Bristle passage opening

5

cutting blade

Claims (17)

Device for pressing a material web (3), in particular on the outer circumference of a roll (2), with a brush roll (4), characterized in that at least the outsides of some of the bristles (4a) do not protrude radially from the brush roll (4). Apparatus for pressing a web of material according to claim 1, wherein at least the outsides of a plurality and preferably of most or all of the bristles (4a) do not extend radially with respect to the brush roller (4). Device for pressing a material web according to claim 1 or 2, wherein at least the outer sides of the bristle sides (4a) with respect to the radial direction of the brush roller (4) have an angle α, wherein 0 ° <α <90 °. Device for pressing a material web according to one of the preceding claims, wherein all bristles (4a) or outer regions of the bristles (4a) deviate in the same direction of rotation from the radial direction of the brush roller (4). Device for pressing a material web according to one of the preceding claims, wherein the bristles (4a) are arranged obliquely with respect to the radial direction of the brush roller (4) on the brush roller (4). Device for pressing a material web according to one of the preceding claims, wherein the bristles (4a) are attached to the brush roller (4) such that the bristle inclination angle α of the bristles (4a) and / or the bristle outside can be changed. Apparatus according to the preceding claim, wherein the brush roller (4) comprises a brush roller inner body (4c) and a brush roller outer body (4b) which are rotatable relative to each other and preferably lockable in the rotated position, wherein the bristles (4a) with the brush roller outer body (4b) and / or the brush roll inner body (4c) are connected or by the brush roller outer body (4b) and / or brush roller inner body (4b) are guided. Device for pressing a material web according to one of the preceding claims, characterized in that the brush roller (4) on a support, in particular on a pivot frame, is fixed and by adjustment of the carrier, in particular by pivoting the pivot frame, from a rest position to the web ( 3) can be employed. Device for pressing a material web according to one of the preceding claims, characterized in that the brush roller (4) on the carrier is rotatable and adjustable, in particular pivotally mounted on the pivot frame, and can be adjusted by driving a drive means relative to the carrier. Device for pressing a material web according to one of the preceding claims, characterized in that the brush roller (4) is releasably secured to the carrier. Device for pressing a material web according to one of the preceding claims, characterized in that the brush roller (4) has a bristle-free contact surface on which the material web can be guided past fitting. Device for pressing a material web according to one of the preceding claims, characterized in that the bristles (4a) of the brush roller (4) are made of a material with a low coefficient of friction or have a non-stick coating. Device for pressing a material web according to one of the preceding claims, characterized in that between the brush roller (4a) and guide bar at least one spring accumulator is arranged, with which the brush roller (4a) can be resiliently biased. Device for pressing a material web according to one of the preceding claims, characterized in that the device is part of a paper roll preparation station, with the splices at the web start of a paper roll (2) can be attached. Device for pressing a material web according to one of claims 1 to 13, characterized in that the device is part of a gluing station in a reel changer with which the web start of a new supply roll can be attached to a running material web. Method for pressing a material web (3) against a body (2), wherein the material web (3) is pressed with a brush roller (4) with inclined bristles (4a). A method according to claim 16, wherein the brush roller (4) rotates against or at the inclination angle α of the bristles (4a).

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