DE102009058591A1 - Sheet pressing and/or punching machine for punching of e.g. paper sheet utilized for packing product, has guide webs differentiated in curvature characteristics in area of punching station, pulling station and cantilever arm - Google Patents

Abstract

The machine (100) has a gripper carriage (1) with two carriage assemblies supported perpendicular to a transport direction (T) by two rollers. The rollers are guided on an internal and external guide webs, respectively. One of the rollers is coupled with a gripper bridge by connecting rods that transfer vertical movement of the roller to the bridge to release lowering movement of gripper arms. The webs are differentiated in curvature characteristics in an area of a punching station (102), a pulling station (103) and a cantilever arm (104). The bridge is rotatably mounted against the carriage.

Description

The invention relates to a sheet punching and / or embossing machine according to the preamble of claim 1.

As punching the cutting is referred to with closed geometric blank forms that can be circular, oval or polygonal and imaginary shapes of all kinds. Also the practices practiced in print finishing, such as punching with punch, corner punching and register punching are counted to this area. The punching takes place against a punching pad or against stamp, in some cases it is also shearing operations. Packaging materials made of paper, cardboard, cardboard or corrugated board are mainly punched in sheet format. When punching but also creasing lines or blind embossing can be introduced into the benefit. This complex process makes it indispensable to punch the sheets individually. Since the end products are sophisticated packaging in terms of technical and graphic design (such as packaging for cosmetics, cigarettes, pharmacy, food, etc.), special requirements are not only placed on the packaging materials themselves, but are also punching tools for optimum results required with the smallest tolerances and extremely precise and reliable punching machines. Flatbed punching best meets these demands. The printed sheets stacked on a pallet are fed to the punching machine. In the machine, the sheets to be punched are precisely aligned in an alignment device, taken over by a gripper carriage and positioned exactly in the punching device between a fixed undercounter and a vertical over a knee lever or eccentric upper table.

In known sheet punching and embossing machines, which are used for punching, breaking, stamping and depositing sheets of paper, cardboard and the like, it is known to move the sheets by means of gripper carriage through the individual stations of the machine. A respective gripper carriage has a gripper bridge, to which grippers are fixed, which grasp the arches at a front end. A gripper carriage further has lateral carriages, which are connected to endless chains of the transport system and whereby the gripper carriage to be moved by the machine. By this type of movement of the sheets through the machine, a continuous work in the individual successively arranged stations of the machine, in particular punching, break-away and Nutzentrennstation allows.

Such a flat bed punch is for example from the DE 30 44 083 A1 known. The two tables are equipped with cutting and scoring tools or corresponding counter tools with which punched out of the cyclically guided between the table surface sheets the benefits and at the same time pressed the necessary for clean folding grooves. In the subsequent breakout the waste is removed by machine tools. Depending on the equipment of the machine finally the punched benefits can be separated in a designated Nutzentrenneinrichtung.

In addition to the sheet punching and embossing machines described above with circulating chains for transporting the gripper carriage goes out of the DE 20 2007 012 349 U1 a sheet punching and embossing machine, the gripper carriage are driven at their outer ends by at least one linear drive. The linear drive is designed as an electric linear drive with traveling wave motors. In such a sheet punching and embossing machine different gripper carriages can be moved at the same time at different speeds.

The EP 1 371 588 A1 describes a sheet punching and embossing machine with gripper carriage and a positioning device for the gripper carriage. The gripper carriages have grippers for gripping arc and are attached to a transport chain. By means of the transport chain, the gripper carriages can be moved intermittently between the processing stations. At the front sides, viewed in the direction of transport, the respective gripper carriages have a stop surface and travel in the processing stations against a pivotable stop of the positioning device. The pivotable stop is attached to a driven pivot shaft and is pivoted by an electric motor in the path of movement of the gripper carriage. By means of the pivotable stop then a register-accurate alignment of the gripper carriage and thus of the sheet is carried out in a respective processing station.

If sheet punching and embossing machines with a circulating sheet transport system are used, it must be ensured that a lowering of the gripper bars in the processing stations is made possible.

Ie. In addition to the register-accurate alignment of the sheet in the circumferential direction of the gripper carriage itself must be lowered in the punching station.

The gripper bridge lowering should allow an exact processing of the bow, as the Sheet comes to rest on the counter tool and so no deformation of the sheet takes place during the machining process.

It is also possible to use a continuous guideway or additional guideway sections in the punch, on the curved path of a roller is guided, which triggers the lowering. However, the use of an additional guideway requires a higher cost and installation costs.

From the DE 10 2004 041 472 A1 and the DE 10 2007 020 495 A1 Gripper carriages are known which allow a register-accurate alignment of sheets in processing stations. A lowering of the gripper carriage and thus the sheet in the processing stations is not possible by these known from the prior art gripper carriage.

The DE 10 2004 041 472 A1 describes a device for transporting a printing material sheet. The device has gripper carriages, which are driven by electromagnetic alternating field motors. The gripper carriages are mounted on a suspension. The gripper carriage storage is characterized by a heavy and expensive construction, and the alignment of the gripper carriage is done via a variety of elements. Thus, joints or spring joints with a plurality of pivot points, which act as a fixed / floating bearing are used, wherein the lateral orientation of the gripper bar is achieved in an embodiment by a slidably mounted on an axis sleeve, ie by an additional relative system. The device described in DE 10 2004 041 472 A1 for transporting and the described systems for supporting the gripper carriages do not allow the gripper bridges in the processing stations to be lowered by precisely these systems.

Another device for positioning and lowering of gripper bridges is in the EP 1 371 588 B1 described.

Object of the present invention is therefore to provide a sheet punching and / or embossing machine with a sheet transport system formed from linear drives, in which a safe lowering of the gripper carriage is made possible in the processing stations.

This object is achieved by a sheet punching and / or embossing machine with the characterizing features of claim 1.

The sheet punching and / or embossing machine according to the invention has at least one processing station, in particular a punching station, a machine control and a sheet transport system. The sheet transport system has encircling gripper carriages with gripper bars, to which grippers are fastened, by means of which the sheets can be gripped and moved in the transport direction through the machine. A respective gripper carriage has - viewed in the sheet transport direction - depending on a right and left carriage, which are driven by linear drives. A respective carriage is supported by at least two rollers in the vertical and thus perpendicular to the transport direction. At least one of the two at least two rollers is guided on an inner guide track of the sheet punching and / or embossing machine. At least one further of the at least two rollers is guided on an outer guide track of the sheet punching and / or embossing machine. At least one of the two rollers is spring-mounted on the gripper carriage. The sprung roller is coupled via a linkage with the gripper bridge and the linkage transmits a vertical movement of the sprung roller on the gripper bridge, so as to trigger a lowering movement of the gripper. The inner guideway and the outer guideway of the sheet punching and / or embossing machine differ in the region of at least one processing station in their curvature. In other words, the guideways do not run equidistantly in the region of at least one processing station. Thus, although one of the two guideways may be rectilinear, the second guideway, however, describe a curve. Since the gripper bars are rotatably mounted against the gripper carriage, the gripper bridge can be rotated and thus the tips of the grippers are lowered.

This solution according to the invention has the advantages that complicated Absenkmechanismen or additional guideways, which serve only the introduction of a lowering, can be avoided. It is also advantageous that the moving masses of the sheet transport system can be kept low.

In an advantageous development of the sheet punching and / or embossing machine according to the invention, the spring-loaded roller is guided on the inner guide track. The roller rolls on the inner guideway and is safely guided, even when cornering.

In a further advantageous and therefore preferred embodiment, the linkage on a roller lever, which is rotatably connected at its end to the gripper carriage. At the other end of the roller lever carries the spring-loaded roller, which rolls on the track. On the roller lever engages a compression spring or a tension spring, in particular a spiral spring, which is connected at its other end to the gripper carriage is. The spring ensures that the spring-loaded roller does not lift off its guideway, but remains permanently in contact.

In a development, the linkage has a coupling rod, which is rotatably mounted at its one end to the roller lever and at its other end rotatably mounted on the gripper bar. The gripper bar has a fulcrum, and the lowering movement of the grippers is effected by a rotational movement of the gripper bar about the fulcrum.

In an advantageous development of the sheet punching and / or embossing machine according to the invention, one of the two guideways in the region of at least one processing station has a lowering or an elevation. The lowering or the survey causes a vertical movement of the spring-loaded roller, so a deflection of the spring-loaded roller, said vertical movement is transmitted through the linkage, which connects the spring-loaded roller with the gripper bar, to the gripper bar.

The invention described, the described advantageous developments of the invention are also in any combination with each other advantageous developments of the invention.

With regard to further advantages and advantageous embodiments of the invention, reference is made to the dependent claims and the description of an embodiment with reference to the accompanying drawings.

embodiment

The invention will be explained in more detail with reference to embodiments. In a schematic representation:

1 an overview of a sheet punching and / or embossing machine

2a and 2 B a device for lowering the gripper bar in a first embodiment

3a and 3b a device for lowering the gripper bar in a second embodiment

4a and 4b a device for lowering the gripper bar in a third embodiment,
wherein the figures a each represent the situation before lowering and the figures b respectively the situation after lowering.

In 1 is the basic structure of a sheet punching and embossing machine 100 shown for punching, breaking and depositing sheets of paper, cardboard and the like. The punching and embossing machine 100 owns a feeder 101 , a punching station 182 , a breakout station 103 and a boom 104 coming from a common machine body 105 be worn and enclosed.

The bows 106 be through an investor 101 isolated from a pile, the sheet transport system 107 fed in and on gripper bridges 11 a gripper carriage 1 attached grippers 12 taken at its front edge and in the sheet transport direction T intermittently through the various stations 102 . 103 and 104 the punching and embossing machine 100 pulled. The sheet transport system has 107 several gripper carriages 1 so that several bows 106 at the same time in different stations 102 . 103 and 104 know to be edited. The gripper carriage 1 are driven by an electromagnetic linear drive with traveling wave motors.

The punching station 102 consists of a lower crucible, a so-called sub-table 109 , and an upper crucible, a so-called upper table 110 , The upper table 110 is vertically moved back and forth and provided with punching and Rillmessern. The undercounter 109 is firmly mounted in the machine frame and provided with a counter plate to the punching and Rillmessern. During the processing of the bow 106 This is in peace and lies flat on the table 109 on. For this, a respective sheet must first be aligned and lowered in register.

The gripper carriage 1 transports the bow 106 from the punching and embossing station 102 in the following stripping station 103 equipped with breakout tools. In the stripping station 103 With the help of the stripping tools, the unwanted pieces of waste are removed from the sheet 106 pushed out to the bottom, causing the waste pieces 111 into a cart-like container inserted under the station 112 fall.

From the breakout station 103 the bow comes 106 in the boom 104 where the bow 106 is either simply filed, or at the same time there is a separation of the individual benefits. The boom 104 can also do a palette 113 included on the individual bows 106 in the form of a stack 114 be stacked, so that after reaching a certain stack height, the pallets 114 with the piled sheets 106 from the field of punching and embossing machine 100 can be driven away.

2a shows a gripper carriage 1 with two carriages, whereby only one of the two carriages can be seen and the second carriage is behind the leaf level. The gripper carriage 1 is driven by a lying in the sheet plane, not shown here linear motor. Here also not shown roles support the constant magnetic attraction. Shown are two roles 18 , which on the gripper carriage 1 are attached. These roles 18 be on an outer guideway 3 guided. Next has the gripper carriage 1 a spring-loaded roll 17 which is on the inner guideway 2 to be led. Guided by the roles 17 . 18 and driven by the linear motor, not shown, the gripper carriage 1 moved in the transport direction T. The spring-loaded roller 17 is at one end of a roller lever 19 rotatably mounted. The other end of the roller lever 19 is on the gripper carriage 1 attached (joint 16 ). A feather 17.1 is at one end with the roller lever 19 and at the other end with the gripper carriage 1 connected. On the roller lever 19 is still a coupling rod 13 appropriate. The coupling rod 13 is also with the gripper bridge 11 connected. The gripper bridge 11 which grippers 12 carries is over at least one mounting bar 14 with the gripper carriage 1 connected. The one end of the mounting bar 14 is firmly connected to the gripper carriage, the other end of the mounting rod 14 is in the pivot 15 with the gripper bridge 11 connected. The gripper bridge 11 can around this pivot point 15 be panned. Will now the gripper carriage 1 moved further in the direction of transport T, so rolls the spring-loaded roller 17 along the inner guideway and thus along the elevation 2.2 , The situation when the spring-loaded role 17 at the level of the survey 2.2 is located in 2 B shown.

Because the spring 17.1 causes the spring-loaded roller 17 in contact with the inner guideway 2 remains, performs the spring-loaded role 17 in the area of the survey 2.2 a vertical movement upwards. About the roller lever 19 and the coupling rod 13 becomes the vertical movement of the sprung roll 17 on the gripper bridge 11 transfer. The front end of the gripper bar seen in the transport direction T. 11 is raised and the grabber bridge 11 around her fulcrum 15 pivoted so that a lowering movement a of the gripper 12 is initiated.

In the 3a and 3b as well as 4a and 4b in each case an alternative embodiment is shown. Instead of the survey 2.2 owns the inner guideway 2 a reduction 2.1 , The spring-loaded roller 17 is due to the lowering 2.1 imposed a vertical movement down. This vertical movement is analogous to the procedure described above on the roller lever 19 and the coupling rod 13 on the gripper bridge 11 transfer. The gripper bridge 11 becomes her pivot 15 panned and the grippers 12 experience a lowering movement a.

LIST OF REFERENCE NUMBERS

1

Gripper carriage with two carriages

2

inner guideway

2.1

lowering

2.2

survey

3

outer guideway

10

Device for lowering the gripper bridge

11

gripper

12

grab

13

coupling rod

14

mounting rod

15

Fulcrum gripper bridge

16

joint

17

spring-loaded roller

17.1

feather

18

fixed role

19

roller lever

101

investor

102

punching station

103

stripping

104

boom

105

machine housing

106

bow

107

Sheet transport system

109

under table

110

overtable

111

trimmings

112

dare

113

palette

114

delivery pile

115

Control with interface and input devices

116

feed

a

Lowering movement Gripper bridge

f

spring load

T

transport direction

e

Sheet transport plane

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 3044083 A1 [0004]
• DE 202007012349 U1 [0005]
• EP 1371588 A1 [0006]
• DE 102004041472 A1 [0011, 0012]
• DE 102007020495 A1 [0011]
• EP 1371588 B1 [0013]

Claims (8)

Sheet punching and / or embossing machine ( 100 ) with at least one processing station ( 102 . 102 . 103 ), a machine control ( 115 ) and a sheet transport system ( 107 ) with revolving gripper carriage ( 1 ) with gripper bridges ( 11 ) on which grippers ( 12 ) are attached, with which the bow ( 106 ) and in the transport direction (T) through the machine ( 100 ) are movable therethrough, wherein the gripper carriage ( 1 ) each have two carriages and wherein the sheet transport system ( 107 ) is formed by linear drives, characterized in that - a respective carriage of a gripper carriage ( 1 ) by at least two rollers ( 17 . 18 ) is supported in the vertical and thus perpendicular to the transport direction (T), - wherein at least one first roller ( 17 ) on an inner guideway ( 2 ) the sheet punching and / or embossing machine ( 100 ), at least one other role ( 18 ) on an outer guideway ( 3 ) the sheet punching and / or embossing machine ( 100 ), at least one of the roles ( 17 ) sprung on the carriage of a gripper carriage ( 1 ), and - wherein the spring-loaded roller ( 17 ) via a linkage ( 19 . 13 ) with the gripper bridge ( 11 ) and the linkage ( 19 . 13 ) for triggering a lowering movement (a) of the grippers ( 12 ) a vertical movement of the sprung roller ( 17 ) on the gripper bridge ( 11 ) and that the two guideways ( 2 . 3 ) in the area of at least one processing station ( 102 . 103 . 104 ) differ in their curvature. Sheet punching and / or embossing machine according to claim 1, characterized in that the spring-loaded roller ( 17 ) from the inner guideway ( 2 ) to be led. Sheet punching and / or embossing machine according to one of the preceding claims, characterized in that the linkage comprises a roller lever ( 19 ), which at one end rotatably connected to the carriage of a gripper carriage ( 1 ) and at its other end the spring-loaded roller ( 17 ) wearing. Sheet punching and / or embossing machine according to one of the preceding claims, characterized in that on the roller lever ( 19 ) one with the carriage of a gripper carriage ( 1 ) connected compression spring or a tension spring, in particular a coil spring ( 17.1 ), attacks. Sheet punching and / or embossing machine according to one of the preceding claims, characterized in that the linkage a coupling rod ( 13 ), which at its one end rotatably on the roller lever ( 19 ) and at its other end rotatable on the gripper bridge ( 11 ) is stored. Sheet punching and / or embossing machine according to one of the preceding claims, characterized in that the gripper bridge ( 11 ) a fulcrum ( 15 ) and the lowering movement (a) of the gripper ( 12 ) by a rotary movement of the gripper bridge ( 11 ) is effected. Sheet punching and / or embossing machine according to one of the preceding claims, characterized in that one of the guideways ( 2 ) in the area of at least one processing station ( 102 . 103 . 104 ) a lowering ( 2.1 ) or a survey ( 2.2 ) having. Sheet punching and / or embossing machine according to one of the preceding claims, characterized in that the linear drives are electromagnetic alternating field motors.

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