in a known manner , the different layers of meat and / or vegetables are stacked inside a container ( 1 ). the top part of the container ( 1 ) takes a lid ( 1a ) which is arranged of such a thickness so as to enable vertical positioning and take a plurality of skewers ( 20 ). the vertical holes ( 1a1 ) taking the skewers ( 20 ), are countersunk at each end . the lid ( 1a ), is centered inside the container ( 1 ), and is applied against the walls . according to the invention , the skewers ( 20 ) are placed in a plurality of tubes ( 38 ) corresponding to the vertical holes ( 1a1 ) of the lid . one of the ends of the tubes ( 38 ) is fixed in a hole ( 38a ) made out in the thickness of a plate ( 38b ) to make up an assembly to guide the tube holder and preposition skewers ( 20 ). the tube holder assembly ( 38 ) is destined to be engaged by the free end of the said tubes , into the holes ( 1a1 ) of the lid ( 1a ), applied against the layers of meat and / or vegetables previously arranged inside the container . the insertion of the skewers ( 20 ) after positioning the tube holder assembly in the lid ( 1a1 ) is therefore carried out from the plate ( 38a ). the length of the tube ( 38 ) is determined so that after positioning in the lid ( 1a ), the inserted skewers ( 20 ), applied against the layers of meat , project a certain length ( x ) from the plate ( 38b ). this is a very slight projecting part ( x ) in respect to the total length of the skewers ( 20 ). for guidance , the part ( x ) substantially represents a quarter of the length of the skewer . considering this design , the skewering device coaxially arranged above the container , comprises a support plate ( 39 ) arranged in a horizontal plane and fixed to a control means ( 48 ) so as to be moved vertical . the plate ( 39 ) takes a freely sliding support component and thrust adjustable in function of the projecting part ( x ) of the skewers , and likely to be applied against the plate ( 39 ). thus thrust component is made up of a base plate ( 40 ) arranged above the plate ( 39 ) with , in particular in its corners , centering and support pins ( 41 ) cooperating by freely sliding into corresponding holes ( 39a ) made out in the thickness of the said plate ( 39 ). the base plate ( 40 ) is coupled to the rod ( 42a ) of a cylinder ( 42 ) whose barrel is fixed to a stirrup ( 43 ) integral with the plate ( 39 ) and above this plate . the control means ( 48 ) of the plate ( 39 ) is a cylinder coaxially arranged inside the machine frame underneath the container . the rod ( 48a ) of this cylinder is integral with a cross bar ( 44 ) which has vertical guiding columns ( 45 ) at each end likely to slide freely into bushes ( 46 ). the top free end of the columns ( 45 ) is also coupled to a cross bar ( 47 ) which is fixed onto the plate ( 39 ). it is to be noted that the arrangement of the guiding columns of the machine frame is determined so that the coupling bar ( 47 ) is sensitively arranged according to the diagonals of the plate ( 39 ). in order to ensure the upward movement of the tube holder , the plate ( 39 ) has temporary gripping means likely to cooperate with arrangements which are provided with the coupling plate ( 38b ) of the tubes ( 38 ). for this purpose , the plate ( 39 ) has , preferably on at least two parallel sides , a cylinder ( 49 ) the rod of which is coupled to a shoe ( 50 ) which has a notch ( 50a ) likely to cooperate with a rod with a shoulder ( 51 ) projecting from the top face of the plate ( 38b ). the shoe ( 50 ) is applied against the plate ( 39 ) which is provided with an opening for engagement and the projection of the rod with a shoulder ( 51 ). in the rest position , the thrust and centering pins ( 41 ) project from the face underneath the plate ( 39 ), very slightly less than the projecting part ( x ) of the skewers positioned in the tubes ( 38 ). the bottom of the container ( 1 ) is positioned and centered in a plate ( 2 ) which is mounted , turning in a part appropriate of the frame , whereas the top part of the said container , particularly the lid ( 1a ), is positioned in a fixed supporting and centering plate ( 31 ) integral with the frame . the base plate ( 31 ) and the lid ( 1a ) of the container are arranged in such a combination so as to enable the circular pivoting of the said container ( 1 ) mounted in the rotary plate . in front of and in register with vertical slits which the container ( 1 ) is provided with in a known manner , a cutting device of any known , suitable kind , is provided so as to ensure the cutting through all the layers of meat inside the container in one single operation . after having filled the container ( 1 ) with various layers of meat and / or vegetables , the skewer guiding and positioning assembly is positioned in the holes ( 1a1 ) of the lid ( 1a ), the tubes ( 38 ) being applied against the end layer ( s ) of the meat . the skewers ( 20 ) are either manually or automatically inserted into the tubes ( 38 ) from the plate ( 38b ), the said skewers , applied against the end layer ( s ) of meat , project a length ( x ) from the plate ( 38b ) as shown . the container ( 1 ) is then inserted into the centering and positioning means of the frame i . e . the rotary plate ( 2 ) and the support and centering plate ( 31 ). it is to be noted that the container ( 1 ) can be inserted into the machine either manually or automatically . it is to be pointed out that the guiding tube assembly ( 38 ) and skewers ( 20 ) can be positioned after inserting the container ( 1 ) into the plate ( 2 ) and the base plate ( 31 ). at this stage , the support and thrust pins ( 41 ) of the base plate ( 40 ), project from the face underneath the support plate ( 39 ) only very slightly less than the projecting part ( x ) of the skewers ( fig2 ). the main control cylinder ( 48 ) and the servo - controlled cylinder ( 42 ) of the thrust component ( 40 - 41 ) are operated so as to start off the lowering of the skewering device assembly . it is to be noted that the cylinder ( 42 ) applies pressure ( p ) onto the plate ( 40 ), prohibiting , at this stage , the operation of a relative movement of the pins ( 41 ) integral to the base plate and the plate ( 39 ). considering that the length of the projecting part of the pins ( 41 ) is very slightly less than the distance ( x ), the plate ( 39 ) is firstly applied against the assembly of skewers ( 20 ) to make them project from the free end of tubes ( 38 ) in the region of 10 mm up to abutment of pins ( 41 ) on the top face of the coupling plate ( 38b ) ( fig4 ). then , the combined action of the cylinders ( 48 ) and ( 42 ) ensures the simultaneous penetration of the skewers ( 20 ) and tubes ( 38 ) into the various layers of meat until abutment of the coupling plate ( 38b ) on the lid ( 1a1 ) of the container ( fig4 ). then , in the opposite direction , the cylinder ( 42 ) is controlled so as to suppress the pressure action and finish inserting the projecting part ( x ) of the skewers under the effect of pressure of plate ( 39 ) controlled by the cylinder ( 48 ) ( fig5 ). a relative sliding movement of the plate ( 39 ) and pins ( 41 ) of the plate ( fig5 ) takes place . it is to be noted that the thickness of the lid ( 1a1 ) and the plate ( 1b ) of the container ( 1 ) as well as the projecting length ( x ) of the skewers , is suitably determined so that after the insertion of the skewers ( 20 ), they project sufficiently from the layer ( s ) of meat arranged on the said plate . a plurality of integral or built up pins can also be provided on the lower face of the plate ( 39 ) which are likely to be engaged in the top part of the tubes when the plate is applied against the lid , in order to finish inserting the skewers ( 20 ). the skewering device assembly is next raised by operating the cylinders ( 42 ) and ( 48 ) so that the relative positioning of the plate ( 39 ) and base plate ( 40 ) with the pins ( 41 ) is the same as the position after inserting the skewers ( fig6 ). the cutting device is then operated to carry out an initial cutting operation then a second one over an orthogonal plane after having circularly indexed the container ( 1 ). the cutting operations are not described in detail as they are executed in a known manner . once the cutting operations are over , the tube holder assembly ( 38 ) is then raised . for this purpose , while the knives are withdrawn after having carried out their second cutting operation , the skewering device assembly is lowered once again ( fig7 ) still in the same relative position of the plate ( 30 ) with respect to the base plate ( 40 ). the cylinders ( 49 ) are then controlled in order to start up the translatory movement of their respective gripping shoes ( 50 ) which are engaged under the shouldered head of the rods ( 51 ) which project from the plate ( 39 ) ( figure b ). the skewering device assembly is then raised again , the tube holder ( 38 ) being gripped to the plate ( 39 ) until the said tubes are released from the top layer ( s ) of meat , but remain positioned in the thickness of the lid ( fig9 ). the skewers ( 20 ) remain inserted in the different layers of meat taking into account the projecting part of the end of the tube after skewering . the meat fibres retighten over the said skewers as the tubes slide towards the top . the cylinders ( 49 ) are then controlled in the opposite direction so as to release the tube holder ( 38 ) which remains positioned in the lid , applied against the top layers of meat . then , you just have to raise the skewering device assembly ( fig1 ) and replace the plate and put the pins back into the initial cycle start position ( fig2 ).
machine for the automatic production of meat and / or vegetable kebabs threaded onto skewers . the object of the invention relates to the sector involving the shaping or treatment of food products . according to this addition , the arrangements taking the skewers are made up of a plurality of tubes corresponding to the perforations of the container lid , the said tubes being fixed at one end into holes made out in the thickness of a coupling plate making up a guiding and positioning assembly for the said skewers .