DE102014101223A1 - Friction feeder for isolating flattened products e.g. paper, has stack shoe cooperated with separation region to individually pull lowermost flattened product of stack from stack and magazine part more interchangeable arranged on support - Google Patents

Abstract

The feeder (31) has a support (29), and a magazine part (21) arranged at the support and receiving a stack of flattened products. A separation region is arranged at a bottom portion of the support. The separation region comprises first and second friction elements for transportation of individual product in a direction of conveyance. A stack shoe (27) is cooperated with the separation region to individually pull lowermost flattened product of the stack from the stack. The magazine part is more interchangeable arranged on the support. The stack shoe is firmly arranged in the magazine part. An independent claim is also included for a friction investor set.

Description

Field of the invention

The invention relates to a friction feeder according to the preamble of claims 1 and 12 and a Reibanlegerset according to claim 13.

State of the art

In order to supply workpieces, in particular flat products such as paper, cardboard or multi-page printing units from a magazine to a subsequent processing or packaging process, so-called friction feeders are known from the prior art.

In the DE 10 2009 042 469 For example, a friction feeder is described with a developed magazine. The magazine comprises a stacking shoe, which feeds the flat products to a separating region with a first and a second friction element. The stacking shoe comprises a stacking plate which leads the flat products to be separated from obliquely upwards to the separating region. The stacking plate is adjustable in its angular position and along the three spatial axes and can be fixed in the selected end position by means of knurled screws. Measurement scales allow the positions in the four directions described to be precisely set and also reproduced. When changing the format of the products to be separated, however, the stacking shoe must be set exactly to the new format. This is very important because the product is jammed between the first and second friction elements at a setting of the stacking plate that is not suitable for the product, or several products are pulled into the friction elements at once. However, the exact positioning of the stacking shoe in a certain angular, vertical and horizontal position causes relatively long setup times.

When changing the friction feeder to a new product format that has not yet been processed, the positions of the stacking shoe have to be adapted to the new format through tedious test series. The changeover times are therefore correspondingly long.

In the US 2005 0242487 a friction feeder is shown, which comprises a hopper for a Stapelblatteinzug and a conveyor belt. The feed direction facing away from the part of the hopper has a bent in the direction of feed guide to guide the bottom sheet in the direction of the feeder. In order to compensate for the lower tensile forces on the lowermost sheet at a lower stack weight, a biasing member is provided which presses the lowermost sheet on the conveyor belt. However, pretensioning is a moving part that provides an approach to blade entrapment. In addition, the preload must be adapted to different leaf surfaces and weights.

Object of the invention

It is therefore an object of the invention to propose a friction feeder, which has particularly short set-up times in a format change of products to be separated.

description

According to the invention the object is achieved in a device according to the preamble of claim 1, characterized in that the stacking shoe is fixedly disposed in the magazine and is free of adjustment for changing the position of the stacking shoe relative to the support. Settings of the stacking shoe are time-consuming, since in the prior art usually has to be done in 4 directions, namely in the direction of the three spatial axes and an angular adjustment. This applies when already known settings for a format change are to be made and even more so when changing to a new product format in which the settings of the stacking shoe are not yet known. In the latter case, the attitudes must first be determined by trial and error. Adjustments are not necessary in the friction feeder according to the invention. Therefore, the set-up times of this Reibanlegers are very short.

In a particularly advantageous embodiment, the magazine is arranged interchangeably on the support. If a format change of flat products is required, the magazine should only be exchanged for another magazine whose pile shoe settings are specially adapted to the new format. The magazines can have a variety of shapes, stacking shoes and staple shoe settings. This ensures that the separation of the different flat products works very reliably. A jamming of products or the simultaneous transport of products can be prevented. Of importance is that all different magazines have a same docking device on the support to allow quick replacement with each other. The magazine used is therefore automatically locked in a position relative to the support, which position requires no readjustment.

Expediently, the magazine can be fixed without tools to the support and can be removed from the support without tools. Fastening and releasing the corresponding magazine without the need for a tool, the duration reduce set-up times even further. For example, a magazine with a quick release, in particular a lever, can be held on the support when the closure is closed and removed from the support when the closure is open.

It proves to be advantageous if the magazine has a holding element which can be fixed to the support with positive locking. As a positive fit a variety of detachable connections are conceivable. These include but not limited to pin and keyhole hole, locking lug and headband, dovetail connection, etc. Positive locking connections hold very reliable and can be easily solved if necessary. This type of releasable mechanical connection is therefore very well suited for holding the magazine to the support.

In a further advantageous embodiment, the holding element is a holding plate, which defines the magazine shaft together with at least one lateral guide. The holding plate serves as a base on which all attachments for the magazine shaft and the positive connection are held. On the holding plate, the product stack can slide on its way in the direction of the separating region.

In a particularly preferred embodiment, the stacking shoe is fixed inextricably attached to the at least one side guide. The stacking shoe is in a position relative to the side guides, which is adapted to a specific product format. A solubility or an adjustability of the stacking shoe is therefore not desirable because only one product format is processed with a magazine.

It is advantageous if the at least one side guide is set immovably on the holding plate. The magazine shaft width, which is defined by the side guides is also adapted to a single product format and the fixed attachment to the support plate is desirable so that no adjustments are made.

In a further preferred embodiment, at least one passage is provided on the retaining plate, which can be suspended in a projecting from the support pin. These structural features an embodiment of a positive releasable connection is realized. The weight pulls the magazine down and the pins lock into the bushings automatically. In addition, the bushings could still have a snap mechanism, so that the retaining plate is liftable only after releasing the snap mechanism against the force of gravity.

Because the at least one pin can advantageously be adjusted in height relative to the singling area, the vertical position of the magazine can be changed and the contact pressure of the product stack adjusted to the friction elements. This may be necessary if the friction elements wear out and the adjustment parameters change as a result.

It is advantageous if the at least one bushing has the shape of a keyhole bore. The keyhole bore has first and second passages. The diameter of the first passage is smaller than the diameter of the second passage. Due to the weight of the magazine, the pin automatically comes to lie in the area of the keyhole bore with the first passage. Since the pin conveniently has a head with a larger diameter than the first passage, the pin is held in the keyhole bore. When the magazine is raised, the second passage is penetrated by the pin. Since the diameter of the second passage is larger than the head of the pin, the pin can be pulled out in this raised position through the second passage. Such engagement and disengagement of the magazine on the at least one pin can be done in a few seconds.

In a further preferred embodiment, the holding plate on a handle. The handle allows a safe and comfortable holding of the magazine when it is worn to the rub, is suspended to the support on the support is raised, is removed from the support and replaced with another magazine.

A further aspect of the invention relates to a friction feeder for separating flat products, such as paper, cardboard or multi-page types of printing, which have different formats according to the preamble of claim 12. According to the invention, the magazine is arranged interchangeably on the support. The aim is therefore not to adjust a single permanently installed magazine in order to adapt it to different product formats. Rather, it is the goal of the magazine as soon as possible to exchange for another magazine.

Yet another aspect of the invention relates to a Reibanlegerset with a plurality of magazines. Here, the magazines are adapted to different product formats, which are intended for further processing, in particular for insertion in a package. If the product is changed, a magazine is replaced with the magazine intended for the new product.

Expediently, the distance between the side guides of the plurality of magazines differs, since the different product formats to be processed usually also differ in their lengths or widths.

The interchangeability of the different magazines and that the individual magazines are already adapted exactly to the product format to be processed, enables a very rapid magazine change. Advantageously, a magazine change in less than 3 minutes, preferably in less than 2 minutes and more preferably in less than 1 minute feasible.

Further advantages and features will become apparent from the following description of an embodiment of the invention with reference to the schematic representations. It shows in not to scale representation:

1 : An axonometric view of a friction feeder known from the prior art;

2 : an axonometric view of a stackable shoe with four adjustments;

3 a further prior art friction feeder with a view of a magazine shaft and a stacking shoe;

4 : An axonometric view of an embodiment of a magazine used in a friction feeder according to the invention;

5 : a front view of the magazine 4 ;

6 : A sectional view along the section line VV of 5 and

7 : An axonometric view of a friction feeder with built-in magazine according to the 4 - 6 ,

In the 1 is a first friction feeder 1a shown in the prior art. The friction feeder serves to singulate flat products, in particular of paper or cardboard, out of a stack of flat products. The stack is in a magazine 3 held, wherein the lowest product in the stack is fed individually to a subsequent processing step. The magazine 3 is on a support 4 of the friction feeder 1a established. A separating region comprises a first and a second friction element, for example rollers running against one another 5 with a rough surface, which promote individual flat products in one direction to the further processing step. The magazine 3 includes a first and second retaining bridge 7a . 7b , The retaining bars 7a . 7b have a forwardly inclined position relative to the vertical, thereby ensuring that the product stack on the support webs 7a . 7b is applied. At the first and second jetty 7a . 7b are first and second side guides 9a . 9b arranged. The side guides 9a . 9b hold the stacked products one above the other and are preferably displaceable relative to the support to the distance of the side guides 9a . 9b to adapt to different product formats.

In 2 is a known from the prior art guide element 11 shown. The roles 5 act with the guide element 11 together so that the lowest product in the stack is pulled out of the stack one by one. The guide element 11 includes one in the direction of the rollers 5 after pre-curved stacking shoe 13 , The stacking shoe 13 The task is to fan out the lower products of the stack, so that not several products simultaneously in the roles 5 to be pulled. The retaining bars 7a . 7b , the side guides 9a . 9b , and the pile shoe 13 define a magazine shaft 10 in which the stack is inserted.

The guide element 11 has a plurality of adjustment options to its location relative to the support 4 to be able to change. By knurled screws 14a . 14b . 14c and 14d can be the position of the stacking shoe 13 in the 3 dimensions and in an additional pivoting direction 15 to adjust. Precise setting of the positions and their reproducibility are measured scales 17a - 17d , Similarly, the stacking shoe can be 13 of the second Reibanlegers 1b according to the 3 adjust exactly. In 3 is the adjustability of the side guides described above 9a . 9b shown. Also this adjustability is by another measuring scale 17e reproducible.

Only the exact positioning of the guide element 11 or the stacking shoe 13 that allows only a single product in the rolls 5 is withdrawn. Is the stacking shoe 13 not exactly to the products to be separated, in particular their format, their weight and thickness, adapted so jammed the product or several products are transported simultaneously. The adjustment process is therefore of great importance for the reliable operation of the friction feeder 1a . 1b , but is tedious and extremely time consuming. Especially when switching to a new product format, the stacking shoe 13 be adapted by trial and error to the new product format. The expert reader therefore recognizes that the set-up times of such a conversion take a lot of time and are accordingly expensive.

The present invention, which by a in the 1 to 4 shown embodiment is exemplified, therefore, the task is based on keeping the set-up times for a format change as short as possible.

In the 4 to 6 is a magazine 21 for inserting a stack of flat products, in particular of paper or cardboard. The magazine 21 comprises a holding element in the form of a holding plate 23 , a first and second side guide 25a . 25b and a pile shoe 27 , These elements together define a magazine slot 28 , The first and second side guide 25a . 25b are firm with the retaining plate 23 connected and the stacking shoe 27 is fixed to the free end faces of the side guides 25a . 25b connected. The connections are not intended to be released again. Welding, gluing, riveting or screw connections are therefore conceivable. Accordingly, the stacking shoe has 27 a fixed position relative to the side guides 25a . 25b , which is not changeable and there are no settings on the magazine for changing the position of the stacking shoe 27 intended. Both the position of the stacking shoe 27 as well as the dimensions of the magazine shaft 28 be already during the manufacture of the magazine 21 adapted to a specific product format. The use of the magazine 21 with another product format is not provided.

According to 7 can the magazine 21 with its retaining plate 23 on a support 29 be attached and is therefore part of a Reibanlegers 31 , For a product change is the magazine 21 to exchange for another magazine. The position of the stacking shoe and the dimensions of the magazine slot of the other magazine are exactly adapted to the new product, so that it only needs support for the format change 29 must be attached. No further adjustments or adjustments to the new format are required.

To be able to change the magazine as quickly as possible, each of the magazines is tool-free with the support 29 latched. For this task, there are a variety of form-fitting solutions. Is exemplary in the 4 to 7 a bracket with keyhole holes 33 shown. The keyhole holes 33 are on the retaining plate 23 provided and cooperate with pins which on the support 29 are arranged in appropriate places. The pins (not shown in the figures) have a head whose diameter is slightly smaller than the larger diameter of the keyhole bore 33 is. The distance of the head from the support 29 is slightly larger than the wall thickness of the retaining plate 23 , These coordinated dimensions allow the magazine to engage quickly 23 at the support 29 , By gravity, the magazine slides 21 down the pins. To release the connection is the magazine 21 Simply pull up and the pin heads slide through the keyhole holes 33 , It is immediately obvious that, for example, locking lugs which engage in U-shaped brackets or dovetail connections are suitable for a detachable connection between magazine 21 and support 29 manufacture. For simplified locking and unlocking or for carrying the magazine 21 This is with a carrying handle or handle 35 Mistake. A format change can be done very quickly because only the magazine 21 must be posted and the appropriate for the new format magazine in the support 29 must be hung. The keyhole holes of the various magazines are all provided in the same places of the holding plates to wobble freely interact with the pins. Further adjustment is not necessary. A format change, which is limited to the magazine exchange, is therefore possible in less than 1 minute.

A Reibanlegerset may include a base body with singulation area and support and a plurality of magazines. For each flat product to be processed another magazine is provided. If another product should be included in the manufacturing process, it goes without saying that another magazine, specially adapted to this product format, can be connected to the base body.

The inventive friction feeder 31 characterized by very short set-up times, since time-consuming adjustments and adjustments to a new product format are eliminated. The adaptation of the friction feeder 31 The new product format is achieved by simply changing the magazines. The positions of the stacking shoe 27 relative to the support 29 and the dimensions of the magazine shaft are adapted to a specific product format for each magazine.

LIST OF REFERENCE NUMBERS

1a

First friction feeder known from the prior art

1b

Second friction feeder known from the prior art

3

magazine

4

Support

5

Rotten

7a, 7b

First and second jetty

9a, 9b

First and second lateral guidance

10

magazine well

11

guide element

13

stack Shoe

14a, 14b, 14c, 14d

Screws

15

pivoting

17a-17e

measurement scales

21

magazine

23

Retaining plate

25a, 25b

First and second lateral guidance

27

stack Shoe

28

magazine well

29

Support

31

Inventive friction feeder

33

Keyhole bore

35

Carrying or grab handle

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102009042469 [0003]
• US 20050242487 [0005]

Claims (14)

Friction feeder ( 31 ) for separating flat products, such as paper, cardboard or multi-page printing materials, which have different formats, with - a support ( 29 ), - one at the support ( 29 ) arranged magazine ( 21 ) for receiving a stack of flat products - a magazine shaft ( 28 ) and - a stacking shoe ( 27 ), - a separation area, which - at the lower part of the support ( 29 ) and - comprises a first and second friction element for transporting a single product in a conveying direction, wherein - the stacking shoe ( 27 ) cooperates with the singulation area in order to pull out of the stack the lowermost flat product individually from the stack, characterized in that the magazine ( 21 ) interchangeable with the support ( 29 ) is arranged. A friction feeder according to claim 1, characterized in that the stacking shoe ( 27 ) firmly in the magazine ( 21 ) is arranged and free of adjustment for changing the position of the stacking shoe ( 27 ) relative to the support ( 29 ). A friction feeder according to claim 1 or 2, characterized in that the magazine ( 21 ) without tools on the support ( 29 ) and can be fixed without tools by the support ( 29 ) is removable. A friction feeder according to one of claims 1 to 3, characterized in that the magazine ( 21 ) a holding element ( 23 ), which under positive engagement with the support ( 29 ) is determinable. A friction feeder according to claim 4, characterized in that the holding element is a retaining plate ( 23 ), which together with at least one side guide ( 25 ) the magazine shaft ( 28 ) Are defined. A friction feeder according to claim 5, characterized in that the stacking shoe ( 27 ) unsolvable on the at least one side guide ( 25 ). Grub applicator according to one of claims 5 to 6, characterized in that the at least one side guide ( 25 ) adjustable on the retaining plate ( 23 ). Grub applicator according to one of claims 5 to 7, characterized in that on the retaining plate ( 23 ) at least one implementation ( 33 ) provided in one of the support ( 29 ) protruding pin is suspended. A friction feeder according to claim 8, characterized in that the at least one pin is adjustable in its height relative to the separating region. Friction feeder according to one of claims 8 to 9, characterized in that the at least one passage (the shape of a keyhole-bore 33 ) having. Grub applicator according to one of claims 5 to 10, characterized in that the retaining plate ( 23 ) a handle ( 35 ) having. Reibanlegerset with a plurality of magazines according to any one of the preceding claims, which magazines differ in the angular, horizontal and / or vertical position of their stacking shoe relative to the support. Reibanlegerset according to claim 13, characterized in that the distance of the lateral guides of the plurality of magazines is different. Reibanlegerset according to any one of claims 13 to 14, characterized in that a magazine change in less than 3 minutes, preferably in less than 2 minutes and more preferably in less than 1 minute is feasible.

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