DE1176024B - Cutting device - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Boarding school KJ .: B 26 b

German KL: 69-24

Number: 1176 024

File number: B 663141 c / 69

Filing date: March 12, 1962

Opened on: August 13, 1964

The invention relates to a cutting device in which the cutting member is rotatable on a handle is mounted and set in rotation by a drive device arranged in the handle is, and in which the cutting element, designed as a ring knife, is surrounded and guided by a retaining ring which is attached to a part on the handle.

A cutting device is known in which two are arranged side by side with surface contact Cutting members in a reciprocating, counter-rotating movement by a drive device be moved. The cutting members and the holding part of the same do not have a common middle Opening up.

Another known cutting device is provided with a ring knife, the one parallel to the Has the axis of rotation extending cutting edge which is directed outward.

It is also a plate-shaped cutting knife for cutting strips of paper, cardboard, Plastic, fabric and the like are known that have a truncated cone shape, with a annular bead is arranged. Here, the cutting edge is located on the outer circumferential surface the conical disc. It is located on the largest diameter of the conical ring knife thus unprotected and very exposed to the possibility of damage.

The object of the invention is to create a ring knife for a cutting device of the type mentioned, in which the above-mentioned disadvantages are avoided. The invention is characterized in that that the ring knife held in a known manner in the shape of a truncated cone with the cutting edge part formed inwardly to the inner opening common to the retaining ring and the base part i.e. the side of the ring knife with the larger diameter on which the retaining ring is guided. By this training is achieved that the cutting edge of the ring knife is substantially protected, and against bumping into the handling of the cutting device. It is also avoided that the Operator can not easily come into contact with the cutting edge. On the other hand, that remains Cutting edge free for engagement with the material to be cut, so that an effective cut can be made can.

Further details and advantages emerge from the description. In the drawing shows:

F i g. 1 is a plan view and

Fig. 2 is a side view of the cutting device according to the invention,

Cutting device

Applicant:

Bettcher Industries, Inc., Vermilion, Ohio

(V. St. A.)

Representative:

Dr.-Ing. A. v. Kreisler,

Dr.-Ing. K. Schönwald, Dr.-Ing. Th. Meyer

and Dipl.-Gkem. Dr. rer. nat. J. F. Fues,

Patent attorneys, Cologne 1, Deichniannhaus

Named as inventor:

Louis Andrew Bettcher, Cleveland, Ohio

(V. St. A.)

Fig. 3 shows a partial on a larger scale Longitudinal section along the line 3-3 in FIG. 1;

Figs. 4 and 5 show at different points of the Retaining ring and the ring knife guided cross-sections along lines 4-4 and 5-5 in FIG. 1;

Fig. 6 shows an adjustable stop in section along the line 6-6 in Fig. 1,

F i g. 7 is a perspective view of the cutting device used in a cutting operation;

Fig. 8 is a perspective view of the cutoff a cutting device used on a disc,

9 shows a cross-section similar to FIG. 5 of a modified embodiment.

The cutting device 10 shown in the drawing consists essentially of a holder 11 and a ring knife 12 arranged on the same, the ring knife 12 having the smaller diameter Side has a cutting edge 13 which is brought into engagement with a material to be cut to during a reciprocating relative movement between the ring knife and the material to be cut cut off a part or a slice of it. The cutting device can be used to execute such a cutting process can be used for different types of items to be cut but especially for cutting off a part or a slice of a piece of meat or a Meat product, as will be explained in more detail below.

The holder 11 consists of a retaining ring 14 on which the ring knife 12 is arranged coaxially. Of the

4D9 640/26

Holder 11 is provided with a handle 15 so that the device can be held with one hand and like a Tools of the trade can be handled. The handle 15 extends from the retaining ring 14 at one point of the circumference of the same in the radial direction outward and lies essentially in or adjacent at the level of this retaining ring. The ring knife 12 and the retaining ring 14 have a common middle opening 17 through which the cut material part or slice in an axial Direction goes through. The ring knife and the retaining ring lie around this common opening and completely outside of it.

Fig. 7 illustrates one way of using the device; it shows a support device for a product to be cut, for example a piece of meat 18, namely a work table 19 with a flat top and side and end strips 20, 21, which are directed upwards from the work table and against which the edges of the piece of meat rest to keep the same in the desired working position. The piece of meat 18 can for example be a piece of ox breast or the like, of which a layer of fat 22 is to be cut off in order to prepare it for further treatment, e.g. B. for a pickling treatment for the production of tinned meat. The device 10 is also for Cutting lean pieces of meat from a layer of fat suitable as well as for various others Cutting and chopping work.

The cutting device 10 shown in Fig. 7 is like a hand tool for performing a Cutting process used, in which a strip-shaped part 24 of the layer 22 during a reciprocating relative movement between the ring knife 12 and the work table 19 from Material to be cut 18 is cut off. While this in FIG. 7 shown cutting process is the device 10 by a hand given to the handle 15 movement in the direction of the arrow 25 moved along the material to be cut 18, the ring knife 12 along the top of the material to be cut in the is advanced substantially in the plane of the retaining ring 14, d. H. in a plane leading to the section of the material to be cut is essentially parallel, of which the part 24 passes through the cutting edge 13 is cut off. During the cutting process carried out in this way, the material to be cut is removed 18 cut-off strip-like part 24 through the common opening 17 of the device. The part 24 cut off from the material to be cut 18 can have any desired thickness, which depends on the type the handling of the cutting device 10 and the force exerted is dependent.

The handle 15 consists of a hollow shaft part 15 α of appropriate size and shape, so that the same can be easily grasped by a human hand. The shaft part is with a. provided in the longitudinal direction bore 27. The handle 15 is also firmly connected at the inner end to a gear housing 28 which has a recess which forms a gear chamber 29 into which the longitudinal bore 27 opens. The handle 15 is arranged in such a way that its axis lies in a plane which is perpendicular to the plane of the retaining ring 14 and which contains the axis of the common opening 17.

The retaining ring 14 is fastened with part of its circumference to the gear housing 28 by the retaining ring being inserted into a groove 31 which extends along the concave side of the gear housing 28. The retaining ring is held in the groove by screws 32, the bolts of which are screwed into the gear housing 28, while the heads of the screws partially cover the groove 31 and are in engagement with the retaining ring 14 at points distant from one another in order to hold the same in the groove,
ίο The retaining ring 14 is a one-piece metal part which lies in one plane and which has such a shape and size in the transverse direction that the part is strong enough to carry the ring knife 12, but at the same time in the transverse direction Has minimum size and axial thickness in order to reduce the size and weight of the holder 11 and to oppose the passage of the cut material through the common opening 17 as little resistance as possible. F i g. 5 of the drawing illustrates the relatively small cross-sectional area of the retaining ring 14 on the side opposite the handle 15, and FIG. 4 illustrates the somewhat larger cross-sectional area of the retaining ring on the side adjacent to the handle.

For an important purpose specified further below, the retaining ring 14 is provided on the underside with an annular groove 34 which extends continuously around the common opening 17. The groove 34 has an angled transverse chord shape and consists of the corner recess which is formed by the two annular walls 34 α and 34 b of the retaining ring 14, which extend at right angles to one another.

The ring knife 12 consists of a one-piece metal part of frustoconical shape, which on that side, which has a large diameter, a base part 35 and on that side 36, which has a small diameter, has a cutting edge 13. The ring knife 12 is on Retaining ring 14 arranged such that the base part 35 slidably engages in the groove 34 so that rotation of the ring knife on the retaining ring 14 in the direction of its own circumference and around the common opening 17 can take place. The ring knife 12 and the retaining ring 14 are therefore along the The axis of the opening 17 is arranged one behind the other.

The ring knife 12 is provided with a ring gear 37 on the base part 35. The interdental spaces 37 a of the ring gear 37 are preferably cut directly into the base part 35 and lie on the the retaining ring 14 facing side, so that this ring gear wholly or partially in the portion of the Retaining ring, which contains the guide groove 34.

Like F i g. 1 and 3 show, the ring knife 12 is made by engaging a pinion 40 with the ring gear 37 set in rotation. The pinion 40 is arranged in the gear chamber 29 of the gear housing 28 and connected to a drive device contained in the handle 15, in the present case with the end of a rotatable drive shaft 41 which passes through the bore 27 of the handle. For the purpose of connection with the shaft 41, the pinion 40 is preferably provided with a shaft part 40 a, which has a non-circular sleeve with which a non-circular portion of the shaft 41 is engaged comes. The gear chamber 29 is closed by a cover 42 which extends across the same

and which is fastened to part of the handle 15 by screws 43.

The holder 11 is provided with holding means by which the ring knife 12 is held on the holding ring 14, the base part 35 being displaceable in the groove 34 in the manner described. These holding means consist of a holding plate 45, the lower part 45 α of which is attached to the gear housing 28 of the handle 15 by screws 46 and the upper part 45 b protrudes beyond the gear housing 28 and extends partially along the circumference of the retaining ring 14 on the underside of the same . The retaining plate 45 is flexible so that the end portion 45 thereof has a limited resilient movement relative to the retaining ring 14 so that the ring knife 12 can be removed from the groove 34 and reinserted into the same.

For the purpose of holding engagement with the holding plate 45, the base part 35 of the ring knife 12 is provided on the underside with an annular shoulder 35 α. The shoulder 35 a extends in the lateral direction of the ring knife 12 and around the outside of the same, as in FIG. 4 and 5 show. When the ring knife 12 is combined with the retaining ring 14, the retaining plate 45 comes into engagement with the shoulder 35 α in order to retain the base part 35 in the groove 34. A screw 47 arranged on the resilient part 45 b of the holding plate is provided with a knurled nut 48 so that the resilient part 45 b can be brought into holding engagement with the shoulder 35 'by turning this nut by hand or can be released from the same to to enable the ring knife 12 to be removed from the retaining ring 14.

The rigidly attached part 45 α of the holding plate 45 holds the ring knife 12 by engagement with the shoulder 35 a also in the groove 34. To a clamping To prevent the ring knife, are on the gear housing 28 of the handle 15 at a distance from each other horizontal stops 49 are provided. Like F i g. 6 shows, these stops are near or on opposite sides of the screws 46 so that the ends of the stops with the retaining plate 45 come into engagement to keep the same at a distance from the gear housing 28, so that the ring knife is retained without hindering its free rotation in the groove 34.

The frustoconical shape of the ring knife 12 has an axial bevel on the inside 51, which converges against the cutting edge 13 .. The bevel has such an angle of inclination, that the cutting edge 13 forms the innermost part of the ring knife and a radially inwardly directed Position on that side 36 of the ring knife which has the small diameter. The arrangement of the cutting edge 13 in this position causes the same in an effective manner for the Engagement with the material to be cut 18 is exposed, but is still in a protected position, in which the operator cannot come into contact with.

With the reciprocating relative movement between the ring knife 12 and the material to be cut 18, in which the cutting device 10 is displaced transversely to the material to be cut, the retaining ring 14 is moved in its own plane and essentially parallel to the top of the material to be cut, of which a part is to be cut off, the cutting edge engages with an effective cutting action for the purpose of striping or Into the product to be sliced. The cutting action of the cutting edge 13 is due to the rotation given to the ring knife 12 during the reciprocating motion for the strips or Slice formation particularly effective. Since the cutting edge 13 of the ring knife radially inward is directed and is at the beginning or adjacent to the beginning of the bevel 51, the cut goes Material with progressive reciprocating relative movement between the cutting device and the material to be cut easily through the common opening 17.

Furthermore, since the cutting edge 13 is located on that side 36 of the ring knife 12, which the has a small diameter, the bevel 51 diverges in the direction of movement of the cut Material through the common opening 17. As a result of this diverging shape of the Ringmessefs in the direction of movement of the cut material, the width of the opening 17 increases with the Movement of the cut material progressively and thereby aids the passage of the Material through the opening. From that shown in the drawing and described above In the design of the cutting device 10, it can be seen that the diameter of the opening 17 is essential is greater than the axial length of the retaining ring 14 and the ring knife 12 taken together and that this size ratio is conducive to the free passage of the cut material through the opening is.

The ring knife 12 is substantially rigid and has in relation to the size of the diameter of the Opening 17 has a relatively small axial length. The bevel 51 on the inside of the Ring knife 12 is inclined at such an angle that the cutting edge 13 effectively the protruding described cutting effect for the purpose of forming stripes or slices during the back and forth going relative movement between the ring knife and the material to be cut exerts, resulting from the displacement of the retaining ring 14 transversely to the material to be cut in a substantially parallel position to the top of the same shows from which the strip or the disc is to be cut off. The one for the effect The most suitable angle for the cutting edge 13 is an angle of 45 ° between the bevel 51 and the axis of the common opening 17. Although an inclination angle of 45 ° turns out to be in practice Has proven extremely effective and satisfactory, the slope of the bevel can be made by using a larger or smaller angle value can be changed.

The retaining ring 14 is also frustoconical on the inside so that a bevel 52 results, which extends along the opening 17 and around the same and which is essentially a continuation the bevel 51 of the ring knife 12 in the diverging direction thereof. Since the Bevel 52 of the retaining ring 14 diverges in the direction of movement of the cut material and a progressive increase in the width of the opening 17 causes the movement of the cut Materials also facilitated by the retaining ring.

On the outside between the base part 35 and the side 36 having the smaller diameter the ring knife 12 can have any shape, but is similar to the bevel 51 on the inside

preferably also frustoconical, so that the part of the ring knife protruding outward from the retaining ring 14 outside the base part 35 has substantially uniform radial thickness at all circumferential locations. This even Thickness of the ring knife 12 is advantageous because it allows the manufacture and regrinding of the Knife facilitated so that the cutting edge 13 is kept in a sharp and effective condition can be, although the ring knife through the successive grinding operations in the axial direction is shortened somewhat.

The ring gear 37 is formed on the base part 35 and the ring knife 12 is relative to the retaining ring 14 arranged so that the interdental spaces 37 he on the top of the ring knife for the greater part remain uncovered, as shown in FIG. 1 shows. The uncovered condition of these interdental spaces makes it easier Escape of meat particles or chips during use of the cutting device 10 and ao while cleaning the device after it has been used.

Fig. 8 shows the use of the cutting device 10 in a cutting operation to cut a relatively thin slice 55 from one Material to be cut, namely a meat product which, for. B. consists of a piece of sausage 56. This is on a work table 57 against an edge strip 58 of the same. This protrudes during the cutting process Sausage piece 56 beyond the work table 57, and with the reciprocating movement of the cutting device cuts the cutting edge 13 of the ring knife 12 from the protruding piece of sausage Disk 55 off. The cut disk 55 passes through the opening 17 in the same way through it, as already described for the strip-like part 24 cut off from the piece of meat 18 has been.

9 shows a modified embodiment in which the ring knife 12 α differs from the ring knife 12 described above in that the cutting edge is drawn inward to form a flat ring cutting edge 13 α. The annular cutter 13 then α is adjacent to an inner concave annular surface portion 59, instead of lying in close proximity to the truncated cone-shaped chamfer 51, as the cutting edge. 13

The invention provides a very practical and effective cutting device that can be used for anyone Cutting or chopping process can be used on pieces of meat and various other materials is. Since the ring knife is set in rotation during the cutting process and the cutting edge is on the inside of the small diameter side, the ring knife is extremely effective, but the cutting edge is always in a protected position Location, so that operators are not injured by accidental contact with the same can. 60

Claims (8)

Patent claims: 1. Cutting device in which the cutting element is rotatably mounted on a handle and is set in rotation by a drive device arranged in the handle, and at which surrounds the cutting element designed as a ring knife and is guided by a retaining ring, one part of which is attached to the handle, characterized in that the in on in a known manner in the shape of a truncated cone shaped ring knife (12) with the cutting edge part (13) running inwards to the inner opening (17) common to the retaining ring (14) formed and the base part (35), d. H. the side of the with the larger diameter Ring knife (12) on which retaining ring (14) is guided 2. Cutting device according to claim 1, characterized in that the in the groove (34) of the retaining ring (14) guided base part (35) of the ring knife (12) in a known manner with a Toothed ring (37) is provided, the pinion (40) cooperating with the toothed ring (37) in the gear chamber (29) of the handle (15) is arranged. 3. Cutting device according to claims 1 and 2, characterized in that the base part (35) of the ring knife (12) held in the groove (34) of the retaining ring (14) by a retaining plate (45) is on the one hand the retaining ring (14) and on the other hand the handle (15) carrying Gear housing (28) is fastened by means of screws (46). 4. Cutting device according to claim 3, characterized in that the gear housing (28) has adjustable stops (49) which engage with the holding plate (45) in this way, that jamming of the ring knife (12) is prevented. 5. Cutting device according to claim 3, characterized in that the holding plate (45) has a flexible part (456) resiliently away from the retaining ring (14) in such a way that the Removal of the ring knife (12) is facilitated. 6. Cutting device according to claim 1, characterized in that the axial bevel (51) on the inside of the ring knife (12) has an angle of inclination of 45 °. 7. Cutting device according to claim 1, characterized in that the cutting edge to a flat cutting edge (13 α) is drawn inwards (Fig. 9). 8. Cutting device according to claim 2, characterized in that the interdental spaces (37a) of the ring gear (37) are open to the central opening (17) of the ring knife (12). Considered publications: German Patent Specifications No. 813 125, 859 864, 788, 1108 552. 1 sheet of drawings 409 640/26 8.64 Q Bundesdruckerei Berlin