FR2555482A1 - TRANSVERSE CUTTING SHEAR, IN PARTICULAR OSCILLATING SHEAR - Google Patents

Abstract

A. CROSS-CUT SHEAR, ESPECIALLY OSCILLATING SHEAR. B. CHARACTERIZED IN THAT, AT LEAST ONE OF THE TWO SIDE SIDERS 1 IS PROVIDED WITH A RECESS 17 THROUGH WHICH CAN BE INSERTED BY SLIDING WITH ITS SIDE OPEN FORWARD, CROSS-CUTTING TO THE MATERIAL TO BE CUT 16, A CASSETTE 4 HAVING THE SHAPE OF A U-LAYER PROFILE, THE WINGS OR BRANCHES OF WHICH EXTEND, IN THE INSERTED STATE, ABOVE AND BELOW THE BAND OF MATERIAL 16 THROUGHOUT ITS ENTIRE WIDTH, AND RECEIVE RESPECTIVE THE UPPER KNIFE HOLDER AND LOWER KNIFE HOLDER 6. C. THE INVENTION RELATES TO A CROSS-CUTTING SHEAR, IN PARTICULAR OSCILLATING SHEAR, INCLUDING THE EXCHANGE OF KNIVES IN A MINIMUM OF TIME.

Description

"Cross-section shears, including shears

oscillating ".

  The invention relates to a cross-section shear, in particular an oscillating shear for

  to subdivide a material in continuous circulation into

  lengths adjustable at will, shears constitut

  killed by a shear frame formed by two longitudinal members and a transverse head in which are disposed the upper blade support of an upper knife, and the lower blade support of a lower knife, as well as a cutting, derived from a main drive shaft, for moving the support

of soul.

  An oscillating shear of this type, called "jumping shears" is known for example from German patent 20 25 354. The two knives

  shears are subjected to large mechanical loads.

  and has a high wear, so that a frequent knife exchange is necessary. In addition, a knife exchange is necessary when different cutting programs are to be executed. For this exchange of knives, it is necessary to disassemble and remove from the shears the knives or knife holders of the

  - 25 upper knife and the lower knife which are dis-

  placed rigidly in the shear frame. This requires

  site of expensive and time-consuming manual work, and which

  must be interrupted during the whole exchange of knives, the continuous circulation

of the material to be cut.

  The present invention aims to

  in the case of a continuous-flow shear of the material to be cut, an exchange of

  knives simpler and save time.

  According to the invention, this problem is solved by a shear characterized in that at least one of the two side rails is provided with a

  -video through which can be inserted by sliding

  with its open side forward, transversely to the material-to be cut, a cassette having the shape of a

  U-shaped profile with wings or branches extending

  tooth, in the inserted state, above and below the material band over its entire width, and receive

  respectively the upper knife support and the

lower knife port.

  Since the cassette is open at one end, the actual knife exchange can be performed in an auxiliary working lane, with the belt in circulation, during a period of time during which the shear does not execute. not the cup. The shear stops are

thus avoided.

  The upper knife support forms, with the upper arm of the cassette a set of

  unitary construction, a sliding track extends

  the entire length of the upper branch of the cassette comprising a guide strip provided on the

  main cross of the frame. The superior knife support

  in the self-supporting upper branch of

  the cassette is rigidly applied to the frame of

  protrudes through the T-groove sliding track surrounding the guide bar in

realizing a rigid connection.

  According to the invention, it is provided that the lower knife support is made in two parts, a first is equipped with the lower knife and is guided back and forth uplift and

  lowering in vertical slots which are

  in the side walls of the cassette. The second piece of the lower knife support supported in the shear frame transmits the cutting drive,

  derivative of the main drive shaft, on the first

  first part of sharing the lower knife support.

  A guide strip, provided in the lower region of the shear frame, is provided with a groove or guide track, dug in the bottom of the side walls. For the transmission of drive power on the

  lower knife support, and for reasons of

  truction, this one is not assembled by screwing, as

  the upper knife support, with the lower limb

  re of the cassette. The lower knife support can be raised and lowered, being guided internally in

  the side walls of the cassette.

  So that the lower knife support

  and the lower branch of the cassette, which is simply

  connected to the sliding track through the grooves in the bottom of the side walls,

  have sufficient stability, the lower limb

  re of the cassette is connected to the amount of shear without window. This connection is provided by a grooved roller on the amount of shear and which is engaged in a groove of the side wall. For better centering, the roller and the groove are

conical shape.

  Since the knife holder

  The lower section must have sufficient clearance in the guides.

  on the other hand, the play in the cutting slot of the knife could have a negative influence, it is provided, according to another characteristic of the invention, that the lower knife support can be applied

  by means of a magnetic force against the guide side

  on the back of the knife, in the vertical slits. It is possible to perform a particularly fast knife exchange, by means of a frame

  transportable, which is placed on a sta-

  of the shear and is connected thereto, and which comprises a displacement device in the direction of the circulation of the material to be cut transversely to the shear. This displacement device is suspended from the guide bars of the frame and can thus receive two juxtaposed U-shaped cassettes. In view of his

  longitudinal movement, a spindle drive

  is assigned to each cassette. The trans-

  portable gives the possibility to bring and to position a cassette which was equipped in the workshop with knives -neufs, during the march of the old knife,

  in common with the frame, in front of the shears. After ex

  pulling the cassette with the used knife, in

  the second receiving member of the moving device

  the latter being moved transversely, so that at the same time the new prepared cassette arrives in alignment with the opening window of the amount of

  the shears. The longitudinal displacement for the introduc-

  the cassette in the shears is ensured by the

  spindle dragging, the cassettes being guided in the moving device with a sliding track

  formed by a T-shaped groove. As soon as the new case

  sette is completely in the shears, the crane of the factory carries the frame with the cassette

which is there.

  The invention is explained below at

  with the help of an example of achievement shown in

  joints in which: - figure 1 is a front elevational view of the oscillating shear, - figure 2 is a sectional view of the shear line III-III of figure 1, - figure 3 is a view 2 is a cross-sectional view through II-II of FIG. 1; FIG. 5 is a sectional view IV-IV of FIG. 1; FIG. in front elevation of the cassette according to the invention with transport frame before insertion into the amount of the shear, - Figure 7 is a side elevational view according to Figure 5 seen from the right in

direction of insertion.

  Oscillating shears include

  the shear frame with the two side rails

  1 and 2 and an upper cross member 3, a cassette 4

  with an upper knife 5 and a lower knife support

  6 guided in the cassette and provided with a lower knife 7, and a main drive shaft 8 with the eccentric 9 and 9a offset with respect to

  the other, as well as eccentrics 10 and 10a for the en-

  uplift in opposite directions of the two knives. The upper knife 5 is supported, with the cassette 4, through the sliding track 11 and with the main cross member 3 mounted directly on the eccentric 9 and 9a. On the other hand, the lower knife support 6 is connected, displaceable in rotation, by means of a sliding batten 13 and motion transmission joints 12 and 12a with

the eccentrics 10 and 10a.

  The shear frame receives its pendulum movement via rods 14 and 14a which are articulated on the lower part of the side rails.

  Cassette 4, constituted as a U-neck

  On the side of the closed side spar 1, there is an opening 15 for opening the cassette 4 through the opening 17 of the side spar 2 when the material to be cut is in continuous circulation. The bottom wall 4b of the cassette 4 is centered in the direction

  circulation of the material web through the medium of

  throat 19 and the slide 18 attached to the lanyard

closed 1.

  The slider 13 of the support

  lower knife 6 is maintained, in the state of demon-

  cassette 4, against a tipping over

  intermediate guide strips 21 and 21a, as well as

  the groove and slide assembly 22 and 22a.

  FIG. 6 shows the cassette 4, like a coated U-shaped section, with the opening 15 in the cassette outlet state, with the driving members 30 and 30a adjustable in position by the threaded pins 31 and 31a which are suspended to the transport frame 24, on the extensions 23 and 23a of the slider 11,

  the frame resting on the supports 25 and 25a.

  FIG. 7 shows the cassette 4 in the extracted state with the other cassette 26 prepared on the two sliding battens 23 and 23a of the transport installation 28 that can be slid in the bars of FIG.

  27 and 27a via spindles

  the insertion position 29 for mounting the

  prepared cassette 26 being shown in dot-dashes.

  Finally, the support of the lower knife is applied on the side of the guide facing the knife back a555482 in the vertical slots thanks to the force

  magnet by magnets 32, 32a (Figure 3).

Claims (7)

CLAIMS N E N T I N O I T I N N 5   1) Transverse cutting shears, in particular oscillating shears, for cutting into sections of lengths that can be adjusted at will from a material in continuous circulation, shears consisting of a shear frame formed by two side rails and a   cross main transverse in which are available   the upper knife support of a superior knife   and the lower knife support of a lower knife, as well as by a cutting drive device, derived from a main drive shaft, for   the movement of the knife support, shears   in that at least one of the two side rails   (1, 2) is provided with a recess (17) through which it can be inserted by sliding with its side   open forwards, transversely to the material to be   per (16), a cassette (4) having the shape of a recessed U-shaped section, whose wings or branches extend, in the inserted state, above and below the strip of material (16) on the entire width, and receive respectively the upper knife support and the lower knife support (6).   2) Cross-sectional shears   in claim 1, characterized in that the support   upper knife shape, with the upper limb   cassette (4) open on one side, one of rigid construction.   3) Cross-sectional shears   one of claims 1 or 2, characterized by   a sliding track (32) extending the entire length of the upper branch of the cassette (4) and   comprising a guide strip (11) provided on the tread   main spigot (3) of the shear frame.   4) Cross-sectional shears   any of claims 1 to 3, characterized   rised in that the lower knife support is   made in two parts, of which a first (6) is   view of the lower knife (7) and is guided to be raised and lowered in vertical slots (20, 20a) which are formed in the side walls of the cassette (4), the other knife support portion ( 13) being   supported in the shear frame and transmitting the   cutting drag derived from the eccentrics (10, 10a) of   the main drive shaft (8) on the first part   tie (13) of the lower knife support (6).   ) Transverse cutting shears   any of claims 1 to 4, characterized   rised by a guiding strip (21, 21a) provided in the   lower area of the frame for a groove or gliding track   (22, 22a) machined in the bottom of the lateral walls the (1, 2).   6) Cross-sectional shears   any of claims 1 to 5, characterized   rised by a connection between the lower arm of the cas-   sette (4) and the shear amount (1) devoid of window.   ) Transverse cutting shears   8, characterized by a slider (18) provided projecting on a lateral spar (1) of the frame, and engaged in a groove (19) of the side wall (4).   8) Cross-sectional shear   7, characterized in that the throat   (19) and the eoulisseau (18) are conical.   9) Cross-sectional shears   claim 4, characterized in that the support   lower knife port is applied against the side of   guiding towards the back of the knife in slots.   by means of a magnetic force, by means of magnets (32, 32a).