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Title:
A BLADE-BLADE HOLDER SUPPORT GROUP
Document Type and Number:
WIPO Patent Application WO/2011/007295
Kind Code:
A1
Abstract:
In a blocking of a blade (2) to a blade-holder (1) in machines for cutting articles, the blade-holder (1) is provided with a blade-holding organ (11) providing a housing (12) in which a engagement element (14) is comprised, which engagement element (14), when the blade (2) is positioned in the housing (12), mutually couples with a corresponding seating (R) provided in the blade (2) in order to guarantee positioning and axial orientation of the blade (2) with respect to the organ-bearing organ (11).

Inventors:
GALLUCCI GIANNI (IT)
Application Number:
PCT/IB2010/053105
Publication Date:
January 20, 2011
Filing Date:
July 07, 2010
Export Citation:
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Assignee:
TESEO SPA (IT)
GALLUCCI GIANNI (IT)
International Classes:
B26D7/26
Domestic Patent References:
WO1992010405A21992-06-25
Foreign References:
US2304771A1942-12-08
US2432345A1947-12-09
Other References:
None
Attorney, Agent or Firm:
DALL'OLIO, Giancarlo et al. (Via Delle Armi 1, Bologna, IT)
Download PDF:
Claims:
Claims.

1. A blade (2) - blade holder (1) group, associable to a machine for cutting articles in which the articles to be cut are stretched and blocked on a work- plane, comprising;

a blade-holder (1) constituted by a hooking element (10) associable to the

S machine for cutting articles and exhibiting a blade-holding organ (11), and a blade (2) exhibiting a parallelogram shape comprising two long sides (2a, 2b) and two short sides, the blade (2) being provided at the two short sides thereof with two respective cutting edges (T1 , T2);

characterized in that

o the blade-holding organ (11) affords a housing (12) shaped such as to identify two opposite walls (12a, 12b) and exhibiting a width such as to be able to position the blade (2) therein, the blade-holding organ (11) exhibiting an engagement element (14) which develops transversally from a first wall thereof (12a) at a predefined distance from a terminal portion (110), the 5 terminal portion (110) affording an opening (18) communicating with the housing (12) and a bottom of the housing (12) affording a through-hole (15) at a distance (d) from an edge of the terminal portion (110), and in that;

the blade (2) centrally affords a hole (F) and each of the long sides (2a, 2b) is provided with a seating (R) located at a distance (K) from a point (P) of0 each of the cutting edges (T1 , T2) in such a way that following a positioning of the blade (2) in the housing (12) of the blade-holder (11), a part of the long sides (2a, 2b) of the blade (2) respectively abuts the first wall (12a) and the second wall (12b) of the housing (12) such that the engagement element (14) couples mutually with a seating (R) of one of the two long sides (2a, 2b)5 of the blade (2) which is in contact with the first wall (12a) of the housing (12), the hole (F) in the blade (2) being coaxial with the through-hole (1S) present in the bottom (12c) of the housing (12), and a cutting edge (T1, T2) of the blade (2) projecting from the opening (18) of the terminal portion (110) of the blade-holding organ (11) in order that the articles can be cut.

2). The blade (2) -blade holder (1) group of claim 1, wherein the sĪ²atings (R) on the two long sides (2a, 2b) of the blade (2) are symmetrical to one another with respect to the central hole (F) afforded in the blade (2).

3). The blade (2) - blade holder (1) group of claim 1, wherein the blade- holding organ (11) comprises a pin (16) which is solidly constrained to an external surface of the second wall (12b) of the housing (12), the pin (16) idly supporting an anti-rotation bearing (17) destined to contact a guide of the machine for cutting articles during the cutting operations.

4). The blade (2) - blade holder (1) group of claim 1 , wherein the second wall (12b) of the housing (12) of the blade-holding organ (11) exhibits a shorter length than the first wall (12a).

5). The blade (2) - blade holder (1) group of claim 1. wherein the through- hole (15) afforded in the housing (12) and the hole (F) afforded in the blade (2), which are coaxial to one another once the blade (2) has been positioned in the housing (12), are such as to enable insertion of blocking means for blocking a coupling position of the blade (2) with the housing (12), the engagement element (14) being coupled to the seating (R) of one of the two long sides (2a, 2b) of the blade (2) which is in contact with the first wall (12a) of the housing (12).

Description:
A Blade-Blade Holder Support Group.

Technical Field

The invention relates to the technical sector concerning blocking a tool to a relative support therefor in machines for cutting articles.

In particular the invention relates to machines in which the article to be cut is stretched on a work plane and blocked thereto in order to be cut into predefined shapes by a blade associated to a work-head, vertically activated and with alternating motion.

Background Art

The work-head is provided with a support to which the blade is blocked. In this solution the axial position of the blade and the blocking thereof depends on how the fastening of the blade to the holder is done.

A central through-hole is provided in the blade for the removable blocking thereof, and also comprised is an organ for fastening the blade to the holder.

During the article-cutting operations an axial variation of the blade can occur, caused for example by the loosening of the fastening organ, which because of the tolerances between the fastening organ and the axial hole of the blade causes the axial shift, with all the ensuing drawbacks and problems that derive there-from.

Summary of the Invention

An advantage of the present invention is that it provides a blade-blade holder group which makes perfect centring of the blade possible with respect to the support and which maintains the positioning and axial orientation of the blade during the article-cutting operations.

A further advantage of the invention is to provide a group for removably blocking a blade to the support, which is simple in conception and enables simple and rapid positioning of the blade.

These advantages are obtained in accordance with what is set out in the appended claims.

Brief description of the Drawings. The characteristics of the invention are set out herein below, with particular reference to the accompanying tables of the drawings, in which:

figure 1 illustrates a perspective view of a support for a blade in machines for cutting articles;

figure 2 is a front view of a blade for cutting articles;

figure 3 is a perspective view of the blade holder-blade group;

figure 4 is a front view of the illustration in figure 3,

Best Mode for Carrying Out the Invention.

With reference to the accompanying tables of the drawings, 1 denotes in its entirety a blade-holder to be associated to a work-head, not illustrated, which is an integral part of a machine for cutting hides and the like, also not illustrated, and 2 denotes a tool, in particular a blade.

The holder 1 is constituted by a hooking element 10 (partially illustrated in the figures of the drawings) to be associated in a known way to the work-head of a machine, which hooking element 10 forms a blade-holding organ 11.

The blade-holding organ 11 , as illustrated in figure 1, affords a housing 12 having a width which is not smaller than a width of the blade 2, which housing 12 is for example shaped such as to identify two opposite walls 12a, 12b, respective a first wall 12a and a second wall 12b, the second wall 12b being shorter than the first wall 12a.

An engagement element 14 extends from the first wall 12a, transversally to and at a predefined distance from the terminal portion 110 of the blade- holding organ 110.

The bottom 12c of the housing 12 affords a through-hole 15 at a distance d from the edge of the terminal portion 110.

A pin 16 is solidly constrained to the external surface of the second wall 12b, which pin 16 idly supports an anti-rotation bearing 17 which is mobile, following cutting operations, along a corresponding guide (not illustrated). The terminal portion 110 of the blade-hooking organ 11 affords an opening 18 communicating with the housing 12, the function of which will be more fully described herein below. The blade 2 has known characteristics of a parallelogram shape and is provided with a central hole F and, as illustrated by way of example in figure 2, is provided, at short oblique sides thereof, with two cutting edges Ti 1 T2. The long sides 2a, 2b of the blade 2 are respectively provided, at a distance K from the point P of each cutting edge T1 , T2, with a corresponding seating R.

As illustrated in figures 3, 4, the blade 2 is positioned in the housing 12 of the blade-holding organ 11, such as to define a mutual coupling between the engagement element 14 and the seating R fashioned on one of the two long sides 2a, 2b of the blade 2, with a part of the respective surfaces of the long sides of the blade 2 abutting the respective first seating 12a and second seating 12b.

With this positioning, the hole F of the blade 2 is coaxial to the through-hole 15 afforded in the blade-holding organ 11 and, as illustrated in figure 3, the cutting edge T2 of the blade 2 projects from the opening 18 in order to be able to cut the article following activation of the cutting machine to which the blade-blade holder group 2 is blocked.

Thereafter, the mutual coupling is stabilised by suitable known fastening means, not illustrated, in the hole F and the through-hole 15.

The group described for blocking the blade 2 to a relative support in machines for cutting articles exhibits particularly advantageous characteristics.

The mutual coupling between the engagement element 14 and the seating R, following the positioning in and stabilising of the blade 2 to the blade-holding organ 11, is advantageous, as the correct positioning of the blade 2 is guaranteed with respect to the blade-holding organ 11 and any eventual changes in the position and axial orientation of the blade 2 with respect to the blade-holding organ 11 , following the article-cutting operations,

The fact of comprising, in each long side 2a, 2b of the blade 2, a seating R at a distance K from the point P of each cutting edge T1 , T2 enables the blade to be turned with respect to the blade-holding organ 11 following wear on one of the cutting edges T1 , T2.

The blocking means are extracted from the hole F and the through-hole 15, the blade 2 is extracted from the housing 12, the blade 2 is turned and newly positioned in the housing 12, such that the seating R afforded on the other long side of the blade 2 couples with the engagement element 14. The resulting coupling is then blocked as previously described.

The fact of associating the blade 2 - blade holder 1 group, realised as described herein above, to known machines to the work-head for cutting articles, is advantageous, as the technical-functional characteristics connected to the precision-cutting of the articles are increased with use thereof.

The above has been described purely by way of non-limiting example, and any variations of a practical-applicational nature are understood to fall within the ambit of protection as described above and as claimed herein below.