FR2525946A1 - SHEET CUTTING DEVICE - Google Patents

Abstract

SHEET CUTTING DEVICE, WHICH INCLUDES A SHEAR 2 INCLUDING AN APPARATUS 5 FOR TRANSFERING THE SHEET AND A MARKING APPARATUS 8 PLACED NEAR THE SHEAR. THE MARKING APPARATUS APPLIES A DISTINCTIVE MARK, AT A GIVEN POSITION, ON A SHEET W TO BE CUT INTO FINISHED RANGES W.

Description

The present invention relates generally to a device

leaf cutting; she aims,

  more particularly, a device for cutting a sheet

  the or sheet by means of a shears, after marking of the sheet by means of a marking apparatus. When a sheet of metal or a sheet is cut with a shear, the finished blanks, cut into different shapes in the sheet, fall at the back of the shears and are transferred by a conveyor to a storage station A the latter, operators sort each of the finished blanks, according to the respective shapes, to transfer them to another treatment, respectively. This sorting operation of a large number of blanks is very tiring for workers.

  When the blanks are of the same shape or size

  sines, the operator cannot easily distinguish them

  and quickly from each other Therefore, the ope-

  sorting ration requires several interventions, which

  even more errors and fatigue for the hand-

of work.

  The subject of the present invention is a device

  sheet cutting, which improves the sorting operation.

  The cutting device according to the invention comprises

  takes a marking device, which applies a distinctive mark on each part of the sheet to be cut,

  and a shear that cuts the sheet into finished blanks.

  The shears include a sheet transfer device The marking device is provided near the shears A control device sends signals to the marking device indicative of distinctive marks and also sends control signals to the shears, thanks to to which the transfer device brings the sheet to the marking and shearing positions, then the shears

  cut the sheet into finished blanks.

  The invention will be better understood in the light of

  the description of its non-limiting embodiment

  ve, shown in the accompanying drawings.

  Fig 1 is a schematic plan view of a sheet processing line, according to the invention; Fig 2 is a plan view of a shear and a labeling apparatus; Fig 3 is a side view, along the line

  III-III of Figure 2, illustrating the labeling apparatus

  floor; Fig 4 is a block diagram of a control device;

  Fig 5 is an enlarged view, illus-

  using a distinctive label to stick on the sheet; and

  Fig 6 is a plan view of the sheet, illus-

  trant the positions of sticking of the label and the

cutting genes.

  In an embodiment illustrated by the figure

  gure 1, the present invention is applied to a chain

  sheet processing machine, in which a punch press

  1 turret and 2 shears are arranged in tandem A sheet W is placed on a feed table 3 with rollers, by means of a loading device, not

  shown, and brought to the punch press 1 to all

  The latter makes holes of a pre-

  determined, at a given position, in the sheet W La

  perforated sheet W is transferred to a transfer table

  fert 5 of the shears 2, by a roller conveyor 4.

  Reference 6 designates a digital control device

for the punch press 1.

  The sheet W is then cut to pre-

  determined, by shears 2, in accordance with the program

  of a digital control device 7

  labeling 8 is provided on the side of the shears 2, so

  te qu ne label 9, bearing different numbers and distinctive signs (see Figure 5), is glued to a predetermined position on the sheet W, before cutting the latter The chain also includes a conveyor 11 for the evacuation of a finished blank w, cut from sheet W by shears 2, a computer 12 which controls the entire operation of this processing chain and of the labeling apparatus 8, and a computer 13 which

  sends the information to be printed to the labeling device

floor 8.

  We now refer to Figure 2, which

  presents in detail the shears 2 and the labeling device

  stage 8 The shears 2 comprises a body 14 and cutting blades 15 which intersect perpendicularly in the

  body 14 The sheets W, held by a clamp

  rage 16, are moved on the transfer table 5 in the directions of the axes X and Y respectively, so as to be placed in a predetermined location to be cut

by the cutting blade 15.

  The transfer table 5 comprises fixed tables 5 a and 5 b, fixed on a frame 17, and a mobile table 5 c which can move in the direction of the Y axis. The mobile table 5 c is connected to a transverse carriage 18 which can move on the chassis 17 in the direction of the axis

  Y When a lead screw 21 is rotated by a clamp

  vo-motor 19 mounted on the chassis 17, the carriage 18 is

  place with the movable table 5 c in the direction of the Y axis The locking device 16 for the sheet W can move in the carriage 18, in the direction of the X axis When a lead screw 23 is put in rotation by a servomotor 22 mounted on the carriage 18, the clamping device 16 moves on the carriage 18 and transports the sheet W in the direction of the axis X In other words, by rotation of the servomotors 19 and 22 in a direction,

  a given number of turns, the clamp is moved

  rage 16 and the carriage 18 in the direction of the X and Y axes,

  respectively Therefore, the sheet W can be soul-

  born at any desired position The labeling device 8

  is provided near the intersection of the blades 15 of the shear-

the 2.

  We now refer to Figure 3, which

  presents the labeling apparatus 8, of known type. A bank of 25 labels 9 is wound on a reel 24 and it

  is advanced from spool 24 to a printer 26 A combination

  of appropriate figures and signs (in this example

  ple, five digits from O to 9 and three letters of alpha-

  bet) is printed respectively by printer 26 on

  the labels 9 rows in series on the strip 25 The label

  printed label 9 is brought into contact with a head 29,

  the end of the piston rod 28 of a pneumatic cylinder

  27 The head 29 takes the printed label 9 from the strip 25, by downward movement, and sticks the label 9 to the sheet W placed on the transfer table 5 Preferably, a suction device, not shown , can

  be connected to head 29, so that the latter

  re can operate by suction.

  The labeling apparatus also includes a guide bar 31 for the piston rod 28, a shaft

  drive 32 for reel 24, film holders

  33 consisting of spherical bosses provided on the transfer table 5, and an elongated support plate 34

  to prevent deformation of sheet W when

  fold the label 9 to the sheet W, between the supports 33.

  Glue is applied to the rear face of the label 9 This is positively glued to the sheet W, by the action of punching the head 29 against the sheet W,

  after the label 9 has been separated from the strip 25.

  The shear 2 order process and

  the labeling apparatus 8 is explained below.

  The labeling apparatus 8 is controlled by a device

  positive 35 (see FIG. 2) The control device 35,

  computers 12 and 13 and the nu control device 7

  meric of the shears 2 are electrically connected the

  to each other As shown in Figure 4, a si-

  general data request 36 is sent to computer 12 by controller 35, and also sent to computer 13 through computer 12 computer

  13 provides a data signal 37, to be printed on the label.

  quette 9 by printer 26 (in this example, five numbers

  fres and three letters) and a validation signal 38, ve-

  from computer 13, is sent to the communication device

  command 35, in response to the data request signal 36.

  In accordance with data signal 37, printer 26 of

  the labeling apparatus 8 immediately prints a mark

  than discrimination made up of numbers, or numbers

  fres and letters, on label 9, for example as

shown in figure 5.

  The digital controller 7 controls

  the transfer of sheet W, in known manner, by displacement

  cementing of the carriage 18 and of the clamping device 16 in the direction of the axes Y and X respectively, in accordance with the

  input data signals The input data signals

  very include information that can control the

  displacement of a given part of the sheet W on which

  label 9 is stuck (in this example, the angle

  right leaf W) at a position just

  under the head 29 of the labeling device 8 After moving

  cementing and positioning of the sheet W, a signal of

  labeling 39, issued by the digital control device 7

  that is sent to the control device 35 The pneumatic cylinder

  material 27 of the labeling device 8 is actuated by

  the labeling signal 39, coming from the control device

  35, and the printed label 9 is immediately pasted at the position given on the sheet W

  command 35 sends a locking signal 41 to the device

  digital control 7 Lock signal 41

  confirms that the piston rod 28 returns to its position above

  the upper part, that is to say that the head 29 is not in

  tact with sheet W, then allows the device to com-

  digital command 7 to transfer sheet W.

  When the labeling device 8 has stuck the label

  quette 9 at the position given on sheet W, a signal

  42 end of labeling is sent by the labeling device

  stage 8 to the digital control device 7, via the

  medium of the control device 35 The digital control device 7 reads the following data and sends a synchronization signal 46 to the shears 2, so that

  the clamping device 16 moves the sheet W to the po-

  predetermined position so that the blades 15 of the shears

  cut the sheet W into a finished blank w, as shown

  felt in phantom in Figure 6.

  An alarm signal 43 is sent by the device.

  control command 35 to the computer 12, when a function-

  abnormal operation occurs in the labeling device 8, so as to trigger an audible alarm or to switch on a

  fault signaling lamp (not shown) If

  general 44 intermediate mode is sent by the computer

  12 to the control device 35, to interrupt the de-

  data request sent by the control device 35 to the computers 12 and 13 The control device 35 then controls the labeling device 8, to print successive numbers, starting from 1, on the labels

successive 9 of the band 25.

  In the embodiment described above, the sheet W is punched, so as to obtain profiled holes 45 at the predetermined locations, by the punch press 1 with a turret, then it is moved to the transfer table 5 of the shears 2 and it is stuck on

  an edge by the clamping device 16 The first part

  tie 51 to be cut in the upper right corner, as shown.

  felt in FIG. 6, is moved just below the head 29 of the labeling apparatus 8 The label 9, on which the distinctive letters are printed, by

  example "AEN 00001", is pasted on the first part 51.

  After gluing the label 9 on the first part 51, the sheet W is moved so that the first cutting lines a and b coincide with the blades 15 of the shears 2, then the sheet is cut into a first

finished draft w.

  The sections of the second part 52, of the third

  part 53 are performed in the same way In fact, labels 9 are applied to parts 52, 531

  then each part is cut along the lines

  cutting genes c, d, e, f, from leaf W, successive-

  ment In this example, the distinctive letters successi-

  ves, such as "AEN 00001", "AEN 00002", are printed on the labels 9 and the printed labels 9 are glued to the first part 511 to the second part 52 '

  But these letters of discrimination can

  can be changed at will, by changing the input data to the computer 13 For example, labels bearing all the same distinctive letters can be stuck to the parts all having identical shapes, labels bearing all the same distinctive letters can be glued to the parts cut from a single sheet W, or the printing of the letters can be

  performed in any other appropriate manner.

  Likewise, the labeling positions on each part Sif 52 ′ of the sheet W can be modified

  at will, by changing the input data available

  tif 7 numerical control For example, labels 9

  can be glued centrally on each part

  tie, or the labels 9 can be glued at different positions on each part 51, 52 ,, while avoiding the holes 45 made by the punch press

at the previous stage.

  On the other hand, for example when the labeling positions on the first and second parts 51 and

  52 are adjacent to each other, the first and second

  the labeling process can be carried out continuously and the cutting of the first and second parts 51 and 52 can be carried out continuously In this case, the distance of movement of the sheet W is reduced and

  hours of work may be reduced.

  Likewise, it is understood that the

  cutting of all parts after gluing of all the

  labels to all of the labeling positions on the same sheet W. In the embodiment described above, the labeling device 8 is used as a labeling device.

  Marking Alternatively, a stamping device (not shown

  felt), the letterheads of which can be

  be changed by a control device, can be used

  sé, so that the distinguishing marks are tam-

  directly on the sheet by the sieve apparatus

  On the other hand, instead of the stamping device, a marking press (not shown) can be used, the letter pressure heads of which can be changed,

  so that distinctive marks are pressed directly-

  ment on the sheet, when irregularities on the face of the sheet do not have an annoying effect on the

subsequent treatments.

  According to the present invention, since a distinctive mark is applied to a finished blank separated from the sheet by shears, the operation 4 of sorting the finished blanks becomes very easy, the discrimination between finished blanks of similar shapes can be carried out

  error-free and quickly, the sorting operation can be e-

  executed by a small number of people and in a short time,

  and operator fatigue can be avoided.

  It is understood that modifications of detail can be made in the form and construction of the device according to the invention, without departing from the scope thereof.

Claims (5)

Claims   1 Cutting device for a sheet (W), charac-   terized in that it comprises: means for transferring the sheet to a predetermined position; means for marking a plurality of parts of the sheet, before shearing; means (2) for shearing the   sheet (W) in finished blanks (W); and means of   control of the operation of the transfer means,   means of, shearing and marking means, compliant   even to a predetermined program.   2 Device according to claim 1, characterized in that the transfer means comprise a transfer table (5) comprising fixed tables (5 a, 5 b), mounted on a frame (17), and a movable table (5 c ) who can   move in the direction of the Y axis, a trolley   versal (18) coupled to the movable table (5 c), a lead screw (21) for moving the movable table and the carriage,   and sheet clamping devices (16) which can   can be moved in the direction of the X axis, in the transverse carriage (18), by a lead screw (23) mounted on the cart.   3 Device according to claim 1, characterized in that the marking means comprise a labeling device (8) which sticks a label (9), bearing a distinctive mark, at a predetermined position on the said part of the sheet.   4 Device according to claim 1, characterized in that the marking means comprise a stamping device, which stamps the distinctive mark at the position   predetermined on the part of the sheet.   5 Device according to claim 1, characterized   in that the control means include: a computer   tor (12,13) which sends indicative data signals Z 525946   distinctive marks; a digital control device (7) for controlling the operation of the shearing means (2) and the transfer means (5); and one   control device (35), to control the function-   operation of the digital control device (7) and the marking yen (8).