Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
  • B26D7/0675—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form specially adapted for piles of sheets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/01—Means for holding or positioning work
  • B26D7/018—Holding the work by suction
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B2215/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
  • B08B2215/006—Suction tables

Definitions

• the present invention relates to an installation for cutting sheet materials.
• the invention relates to an installation for cutting piles or mattresses of sheets of materials, in particular of textile materials, using a cutting head (laser beam, vibrating blade, etc.) , the displacements of the cutting head being obtained by numerical control.
• a cutting head laser beam, vibrating blade, etc.
• FIG. 1 An installation for cutting sheet materials of known type.
• the installation essentially comprises a cutting machine proper 10 and a so-called quilting table 12.
• the quilting table is used to make a prior stacking of different sheets, in particular of textile materials, to perform a simultaneous cutting of parts from all of the stacked leaves.
• the cutting machine 10 comprises a frame 14, the upper surface of which constitutes the working face. On the working face, there is successively a feed conveyor 18 which is used to transfer the sheet mattresses from the feed end of the machine to the next area referenced 20 which is the actual cutting area. The useful length of this zone is indicated by L. Below this zone, there is a cutting conveyor 24 which is used to drive the stack of sheets during the cutting operation when the length of the sheet is greater than the length useful for cutting the machine L. The cutting is carried out using a
• REPLACEMENT SHEET cutting 22 which is mounted on displacement means and in particular a gantry 26 which moves along the length of the cutting zone, the cutting head 22 being able to be moved along the length of the gantry 26. Finally, there is an unloading conveyor 30 which is used to transfer the stacks of sheets once they have been cut.
• the installation also includes inside the frame 14 a turbine suction device 32.
• This suction installation is used to create a vacuum at the level of the conveyor 24 to ensure the driving of the stacks of sheets and to keep the sheets stationary. to be cut during the cutting phase. It should also be specified that in order to obtain good suction efficiency, it is generally necessary to have a film of waterproof material above the stack of sheets to be cut.
• the film of impervious material which is stored in the form of a roll 32 is mounted on a roll holder 36 arranged in the middle zone of the feed conveyor 18.
• An object of the present invention is to provide an installation for cutting sheet materials of the type described above which has a reduced bulk compared to the machines of the prior art and makes it possible to optimize the use of consumables (support paper , waterproof film ).
• the automatic cutting equipment for sheet materials which comprises at least one cutting device and at least one device for stacking sheets to be cut, the cutting device comprising a frame having a feed end capable of to cooperate with the output end of the stacking device and an end for discharging the cut sheets, a cutting head mounted on displacement means relative to the frame, a cutting conveyor and an unloading conveyor are characterized in that the frame has an upper face which defines from its supply end to its discharge end a first zone for partially placing the stack of sheets to be cut, said zone having a reduced length, a zone of cutout below which the suction cutter conveyor and an unloading conveyor are mounted, in that the turbine means for creating the suction are arranged below the unloading conveyor, in that said cutting head is mounted on the face of the displacement means facing the supply end of the frame and in that means for supporting at least one roll of impermeable film are mounted above said upper face of the frame substantially at its end feed.
• the length of the cutting device which will later be called a cutter, is significantly reduced due to the elimination of the feed conveyor which is replaced by a zone for partially placing the stack of sheets whose length is reduced.
• the feed conveyor which is replaced by a zone for partially placing the stack of sheets whose length is reduced.
• sufficient space is freed up to allow easy manual positioning of the stack of cut sheets and waterproof film.
• the cutting machine furthermore comprises in the zone for placing means to perforate the support sheet as it advances with the stack of sheets to be cut.
• REPLACEMENT SHEET arranged above the stack.
• the operating cost of the machine is reduced accordingly due to the less expensive nature of non-perforated support sheets.
• Another advantage which results from this resides in the improvement of the conditions of transfer of the stack between the quilting table and the cutting table insofar as the prior art provided that the support sheet was fed in perforated form and therefore permeable, which was detrimental to the quality of the lift.
• the suction means by turbine comprise control means for producing a first suction level when using the conveyors and a second suction level higher than the first during the cutting operation. using the cutting head.
• This arrangement allows on the one hand to reduce the electrical energy consumption linked to the supply of the suction turbine by providing a maximum operating speed only during the effective cutting period. On the other hand, this arrangement makes it possible to reduce on average the noise level resulting from the operation of the suction turbine. Finally, this arrangement makes it possible to use, for the drive of the cutting conveyor, a motor of lower power than that which is usually provided, which reduces the electrical consumption.
• the cutting installation comprises a plurality of fixed stacking devices or quilting tables which are arranged parallel to one another and a single cutting device or cutter, means for guiding the movement of the cutting device perpendicular to the stacking devices, and means for controlling the movements of the cutting device and its stop successively in front of each stacking device.
• this embodiment of the invention is particularly advantageous since it makes it possible to use only a single cutter, the cost of which is very substantially greater than that of the quilting tables in cooperation with a plurality of tables. quilting, which also makes it possible to prepare suitable stacks of sheets on each quilting table when the cutter works in cooperation with another quilting table.
• FIG. 1 shows a cutting installation according to the invention in elevation view
• FIG. 3 is a top view of the cutting installation shown in Figure 2;
• FIG. 4 is a diagram showing the suction device of the cutting machine
• FIG. 5 and 6 show a paper perforating device in the rest position and in the active position usable in the cutting machine according to the invention
• FIG. 7 and 8 show respectively in top view and in elevational view a cutting installation comprising a single cutter and a plurality of quilting tables;
• Figures 9 and 10 show in bottom view and in side view a connection device usable in the installation of Figures 7 and
• the installation comprises on the one hand a cutting device or cutter 40 and on the other hand a quilting table or stacking device 42.
• the cutter 40 comprises an elongated frame 44 having a feed end 46 and a unloading end 48.
• the upper face of the frame 44 which is referenced 50 defines on the one hand a zone for depositing the front end of the sheet mattresses 52, then a cutting zone 54 of useful length L, then a zone of unloading 56 essentially constituted by an unloading conveyor 58.
• a suction cutting conveyor 60 as well as the cutting head 62 have also been shown below the cutting zone 54.
• This cutting head 62 is mounted on support and displacement means essentially constituted by the gantry 64 which moves according to the
• REPLACEMENT SHEET direction of the length of the frame in the cutting area The cutting head 62 is movable in the direction X perpendicular to the direction of the length of the frame. Thus, as is well known, the cutting head can reach any point in the cutting zone 54. As clearly shown in the figure, the actual cutting head 62 is mounted relative to the gantry 64 in such a way that its active part is disposed relative to the gantry 64 towards the supply end 46 of the frame of the machine.
• FIGS. 2 and 3 a structure 68 has also been shown for supporting two rolls of waterproof film 70 and 72.
• the two rollers are mounted in the same vertical plane and are parallel to each other. Either the two rollers 70 and 72 are identical, which allows the replacement of one roller during operation while the other is in use, or these two rolls of waterproof film have different widths for cutting sheets of different width possibly in combination with a device for reducing the useful cutting surface such as a mask of flexible material on the unused part of the cutting zone.
• FIGs 2 and 3 there is also shown in a simplified manner a device 74 for perforating a sheet of paper intended to facilitate the movement of the sheet mattresses on the quilting table, while subsequently allowing the passage of the air sucked in at the cutting area to maintain the pile.
• the chimney 80 for output of the suction system 66 has been shown in a simplified manner.
• the length of the cutting machine is very significantly reduced since this conveyor is replaced by a simple zone for depositing the front part of the stack of sheets, the length can be very short.
• the support structure of the rollers 68 is disposed at the feed end 46 of the machine and that, the cutting head 62 being turned towards the feed end, it is not no longer necessary to pass the material under the movable assembly 64 for the initial positioning of the stack of sheets to be cut. This makes it easier for the operator to place the cutting mat on the cutting conveyor.
• FIG. 4 we will describe a preferred embodiment of the suction assembly.
• a suction pipe 80 which opens into the frame 44 and allows to put under vacuum the cutting conveyor 60 and therefore the cutting zone 54.
• This pipe is connected to the inlet of the turbine d suction 82 via a settling tank 84.
• the outlet of the turbine is connected to line 86, itself connected to a silencer not shown in the figure.
• the turbine 82 is driven by a preferably electric motor 88 via a transmission system 90 of conventional type.
• the electric motor 88 can be controlled by the associated control circuit 92 so as to be able to rotate at at least two different speeds.
• Either the control system comprises a frequency converter which thus makes it possible to vary the speed of rotation of the motor 88 and, consequently, the suction level of the turbine 82, or the motor 88 comprises two separate windings and the circuit of control 92 allows the switch to connect either of the two motor windings to the power supply.
• the suction device also includes means for reducing the temperature of the air at the outlet of the turbine. Indeed, without special precautions, the air outlet temperature is around 80 ° C.
• Another objective is to reduce the thermal shocks applied to the drive motor 88 of the turbine and also to reduce the temperature of the air discharged outside and therefore the nuisance that it can create.
• This additional device bearing the general reference 94 consists essentially of a pipe 96 which recovers the air driven by the fan 98 of the motor 88.
• this pipe 96 an additional fan 100 is provided.
• the air thus exiting the conduit 96 at a temperature of about 40 ° C.
• the output 102 of the pipe 96 is connected to the line 86 output from the turbine 82.
• the mixing of the two gas flow makes it possible to have an overall output flow whose temperature is of the order of 50 * C.
• the machine uses a strip of paper 110 that is not perforated and the cutter includes a perforation device shown at 74 in FIG. 2. That is to say, this device is placed in the deposit area 52.
• the perforation device consists of a cylinder 112 whose length is equal to the width of the cutting table. This cylinder is provided on its periphery with perforation tools such as 114. It is mounted for free rotation on an axis 116 engaged in a movable cover 118. In this zone, the upper surface of the cutting table is provided with a recessed area 120 forming a loop for the paper, the latter passing between the cylinder 112 and the recessed area 120.
• a jack 122 or any other equivalent device makes it possible to control the raising or lowering of the cover and as a corollary that of the cylinder 112 with its perforation tools 114
• the perforation device is in the raised inactive position to allow the introduction of the support sheet.
• the cover 118 is lowered and the perforation device is therefore in the active position.
• the sheet of paper 110 is driven at the same time as the sheet mattress, referenced 124 in FIG. 6.
• the entrainment of the paper simultaneously causes the rotation of the cylinder 112 and therefore the progressive perforation of the paper 110.
• This characteristic of the cutter makes it possible to use a paper of conventional type whose cost is significantly lower than that of a pre-perforated paper and above all to improve the transfer of the stack to an air cushion at the level of the quilting tables.
• FIGS. 7 and 8 show an alternative embodiment of the installation for cutting sheet materials.
• this installation there is a single cutter 130 and a plurality of quilting tables 132, 134, etc.
• the quilting tables are arranged parallel to each other and aligned.
• the single cutter 130 is mounted mobile on rails 136, 138 which are arranged perpendicular to the quilting tables.
• the cutter 130 is provided with a motor controlling rollers such as 140 to cause the cutter 130 to move along the rails 136, 138.
• a reference 142, 144 which cooperates with an electric detector 146 mounted on the side of the cutter 130.
• the detector 146 is activated and controls the stopping of the drive motor of the cutter 130.
• quilting tables 132, 134 make it possible to prepare the sheet mattress on a table while the cutter is working with another table.
• the quilting tables may preferably include conveyors such as 148 or air cushion systems to ensure correct transfer of the sheet mattresses from the table to the cutting area of the cutter 130r-To ensure synchronization of the conveyor cutting 60 of the cutter 130 and means for transferring the mattress from the different quilting tables 132, 134, each table, for example the table 132, is provided with an electrical connection element 150 which is able to cooperate with an element of electrical connection 152 mounted on the supply end of the cutter.
• connection element 152 is associated with a motor device 154 making it possible to automatically engage the two connection elements.
• connection element of the cutter 130 is preferably associated with a mechanical device for compensating for misalignment, thus making it possible to compensate for any positioning errors of the cutter 130 in front of the corresponding quilting table.
• FIG. 9 and 10 illustrate such an electrical connection device.
• the connection device consists of a first movable assembly 152 and a second fixed assembly 150.
• the first assembly 152 comprises the female connector 234, as shown in FIG. 10
• the fixed part 150 comprises the male connector 236.
• the mobile assembly 152 comprises a base 238 which is integral with the cutting machine 10 while the fixed part 150 is integral with the tables 132, 134 for quilting.
• the direction in which the female connection element 234 must be moved in order to snap in with the male connection element 236 will be called the direction of connection marked by the arrow C.
• adjustment marked by arrow A in FIG. 9 the direction orthogonal to the direction of connection C, parallel to the direction of movement of the machine 10.
• a first carriage 244 which is therefore movable relative to the base in the direction C.
• the carriage 244 can be moved in the direction C under the effect of a motor member such than a cylinder, preferably double-acting, 246.
• REPLACEMENT SHEET body 246a of the jack is integral with the base 238 while the end of its rod 246b is linked to the first carriage 44.
• On the first carriage 244 is mounted movable in translation a second carriage 248 which is movable relative to the first carriage along the adjustment direction A.
• the second carriage 248 is provided with two holes 254 and 256 in which the guide rods 250 and 252 are engaged.
• balanced return springs 260 and 262 are engaged on at least the guide rod 250 on either side of the carriage 248.
• the carriage 248 is maintained, in the absence of external forces, in a central reference position.
• an indexing finger 264 which extends in the direction of connection C towards the fixed part 150.
• the indexing finger ends in a beveled end 266.
• the female connection element 234 which is itself connected to a suitable electrical conductor 270.
• the fixed assembly 150 of the connection device comprises on the one hand a centering and position adjustment cam 272 and the element male connection 236.
• the cam assembly 272 is preferably constituted by a vertical plate 274 on which the male connector 236 is fixed.
• connection device In this plate 274 which is pierced with an orifice 276 is mounted a centering system constituted by a plate 278, the active faces 282 and 284 of which form two vertical inclined surface portions symmetrical with respect to a vertical plane PP 'parallel to the connection direction C. These two inclined guide faces converge ent towards an orifice 288.
• the operation of the connection device is as follows: when the cutting machine on which is fixed the movable part 230 of the connection device arrives in the desired position, identified for example by a sensor, this detection controls the activation of the jack 246. The jack 246 pushes the first carriage 244 in the direction of connection C. When the end 266 of the indexing finger 264 comes into contact with the part 278 forming a cam, the second carriage 248,
• REPLACEMENT SHEET in the case where there is a misalignment, is displaced by the cooperation of the finger 66 with one of the inclined surfaces 282 or 284. The displacement continues until, under the effect of this centering, the end of the finger enters the orifice 288 extending the inclined guide faces. In this situation, the female connector 234 is perfectly aligned with the male connector 236 secured to the plate 274. The locking of the two connection elements can then be carried out under very good conditions since these two elements are perfectly aligned.
• Figures 9 and 10 there is shown the carriages 244 and 248 in solid lines in a first rest position and in dotted lines these same carriages in the position they occupy when the electrical connection is made.

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• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Treatment Of Fiber Materials (AREA)
• Details Of Cutting Devices (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

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ID=9433127

Family Applications (1)

Country Status (5)

Cited By (1)

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Citations (7)

• 1992
  • 1992-09-01 FR FR9210453A patent/FR2695059B1/fr not_active Expired - Fee Related
• 1993
  • 1993-08-10 WO PCT/FR1993/000801 patent/WO1994005174A1/fr active IP Right Grant
  • 1993-08-10 DE DE69307326T patent/DE69307326T2/de not_active Expired - Lifetime
  • 1993-08-10 EP EP93917860A patent/EP0658087B1/de not_active Expired - Lifetime
  • 1993-08-10 ES ES93917860T patent/ES2099966T3/es not_active Expired - Lifetime

Patent Citations (7)

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