EP3177443A1 - Chain for saw machines for cutting ornamental stones, adapted to prevent the entrance of impurities between the internal link and the external link of the chain - Google Patents
Chain for saw machines for cutting ornamental stones, adapted to prevent the entrance of impurities between the internal link and the external link of the chainInfo
- Publication number
- EP3177443A1 EP3177443A1 EP14777175.2A EP14777175A EP3177443A1 EP 3177443 A1 EP3177443 A1 EP 3177443A1 EP 14777175 A EP14777175 A EP 14777175A EP 3177443 A1 EP3177443 A1 EP 3177443A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- link
- external
- internal
- links
- chain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
- B27B33/14—Saw chains
- B27B33/142—Cutter elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
- B28D1/12—Saw-blades or saw-discs specially adapted for working stone
- B28D1/124—Saw chains; rod-like saw blades; saw cables
- B28D1/125—Saw chains; rod-like saw blades; saw cables with exchangeable cutter bits or cutter segments
Definitions
- the present invention generally refers to the saw machines for cutting ornamental stones, such as those normally used in ornamental stone extraction quarries (marble, etc). More particularly, it relates to an improvement of the chain of the chain saw machine, such chain being as usual formed by internal links and external links that carry the cutting inserts.
- the inventive concept of the present invention is generally applicable to chains with all types of insert holders and cutting inserts, to any type of arrangement of cutting inserts on the chain, to all types of methods for applying the insert on the insert holder (removable type and otherwise), since it only regards a system for preventing the entrance of mud, dust or the like, in the internal upper part of the external link.
- one object of the present invention is to remedy such drawback of the prior art, by suitably modifying the shape of the internal link and that of the external link on the internal part thereof that receives the internal link.
- the external link is composed of two parts. This allows using specific articulation pins, which, having an intermediate part with greater diameter than the ends thereof, prevent any risk that the pin can exit from the chain.
- FIGURE 1 (la to le): various views of a first embodiment of the present invention, in which the external link is formed by a single piece;
- FIGURE 2 (2a to 2d): various views of the same embodiment of the invention already represented in Fig. 1, which comprise in particular an exploded view and two operation views of the chain;
- FIGURE 3 (3a to 3e): various views of the second embodiment of the invention, in which the external link is formed by two modular parts;
- FIGURE 4 (4a to 4e): various views of the invention, analogous to Fig. 1, but for the second embodiment of the present invention;
- FIGURE 5 (5a to 5c): the operation and the exploded perspective view for the second embodiment of the present invention
- FIGURE 6 (6a to 6c): various views of the first modular part (or front part) of the external link of the second embodiment of the present invention
- FIGURE 7 (7a to 7d): various views of the second modular part (or rear part) of the external link of the second embodiment of the present invention
- FIGURE 8 (8a to 8c): various views of the internal link of the present invention. Detailed description of several preferred embodiments of the invention
- the inventor of the present invention first of all observed the drawback due to the entrance of mud, dust or other impurities, through the opening that is formed between the external link and the internal link at the time when the links rotate with respect to each other, i.e. during the step of rotating the chain around the actuation pinion and respectively around the transmission wheel placed at the free end of the arm of the saw.
- the inventor of the present invention resolved such technical problem by using a particular shape of the internal link and external link.
- This particular configuration of the links first of all allows reducing to a minimum the size of the aforesaid opening, and in addition forms a labyrinth path that further prevents the entrance of mud or the like. It follows that the extraneous material that could still enter inside the external link (after this modification of the shape of the links) in any case corresponds to a null or negligible quantity, whose effect is thus null or insignificant.
- the gradual accumulation over time of a thickness of extraneous material, with harmful effect on the articulation pin is prevented in a reliable manner.
- the present general inventive concept is equally applicable - as will be seen - to both the conventional external links obtained in a single piece, and to a particular type of innovative modular external link. In the latter case, it is possible to use anti-unthreading articulation pins having a central part with greater diameter than the external terminal portions of the pin.
- reference number 1 indicates the internal link
- 2 the external link
- 3 the articulation pin
- Fig. lc is the vertical section A-A of Fig. la passing through this articulation pin 3 between the links 1 and 2.
- Fig. la is repeated along the entire continuous cutting chain, though in order to simplify the drawings only two contiguous links 1 and 2 are shown (the links 1 and 2 being of course alternated, giving rise to the cutting chain).
- the external link has a substantially U-shaped cross section which is constant, i.e. it internally forms a rectangular space with constant free section. Therefore, when an internal link is tilted with respect to an external link, for example at the toothed transmission wheel or at the actuation pinion (as in Figs. 2a and 2d, which refer however to the present invention), an opening is formed for the entrance of mud, dust or the like, between the two links, with the aforesaid consequences that compromise the integrity of the chain.
- the conventional internal link has rectilinear form at the top and bottom, while it is substantially round (i.e. arc of a circle) at the ends that join the upper and lower rectilinear sides.
- the upper side of the internal link 1 forms a recess 4 that is extended between the round ends 5, 5', while the rectilinear lower side 6 of the internal link 1 preferably does not have any recess, or at least such recess is not necessary.
- the dashed line 7 schematically indicates the shape of the conventional internal link on its upper side.
- the external link 2 of the present invention is radically modified with respect to the conventional external link. Indeed, it no longer has a constant internal section, but rather it is solid in the shaded part 8 - which also comprises a projection or barrier 9 against the entrance of mud, dust or the like - and is void i.e. free in the white part 10 (lacking shading) in Fig. 2a.
- Fig. 2a shows a section on a side wall 11 of the external link 2, which underlines the longitudinal section B-B (see Fig. 2c) executed in the longitudinal vertical plane of symmetry of the external link 2.
- the shaded part 8 indicates the material itself of the external link 2 which joins together the opposite side walls 11, 11 ' of the external link 2.
- the free internal section 10 of the external link 2 is reduced to a minimum height "d" (Fig. 2a) in the central part of the external link 2, while at the two ends of the external link 2 it has a curved (substantially circular) form 12, even if this is only shown for one of the articulation holes 14.
- the external link 2 of the invention internally has two concavities 12 that are separated from each other by a flat/rectilinear section 13 (Fig. 2a).
- each of the concavities 12 has a progression such to match the substantially curved- circular shape of the round end 5 (5') of the respective internal link 1, but preferably there is an abutment 16 that limits the maximum tilt angle (p max between the links 1, 2 (e.g.
- the recess 4, receiving the barrier 9 allows the complete alignment rotation of the internal link 1 with respect to the external link 2 (which would otherwise be impossible), while, on the other hand, the barrier 9 has the aforesaid effect of preventing the entrance of impurities.
- the man skilled in the art clearly understands the labyrinth function carried out by the barrier 9 and in particular by the concavity 12 against the entrance of impurities; such barrier and concavity cooperate with the particular shape ("bone-like" form) of the internal link 1. Hence, the entrance of impurities is prevented in the direction of the arrow F of Fig. 2d, between the internal link 1 and the external link 2.
- Fig. 2d shows the aligned position of the links and that corresponding to (p max .
- Fig. 2c is the plan view of Fig. 2d, while in the exploded view (Fig. 2b), one observes the separated links and one of the articulation pins 3 knurled in the central part 17 in order to improve the effect of checking/locking in the respective hole 18 of the internal link 1 of the chain: the articulation pin 3 can instead rotate in the external holes 14 of the external link, which can be more easily lubricated.
- the pin 3 could also be locked in the external holes 14, 14 and freely rotate with respect to the "internal" hole 18 of the internal link 1, even if this solution is much less advantageous since the lubricating grease would reach the "internal" hole 18 with more difficulty).
- section A- A shown in Fig. lc shows the minimum thickness "t" of the upper wall of the external link (measured at the highest point of the concavity 12 in Fig. 2a).
- thickness "t" is equal to the (constant) thickness of the upper wall of a conventional external link.
- the internal link 1 has for example a (conventional) relief 19.
- the second embodiment of the invention (remaining figures) essentially corresponds with the first embodiment of the invention, but with the difference that the external link is no longer single-piece, but rather formed by two modular parts.
- the external link is formed by two modular parts, 102a (front part, or first part) and 102b (rear part, or second part), respectively.
- Fig. 6 corresponds with various views of the front part 102a while Fig. 7 corresponds with various views of the rear part 102b of the external link 102 of the second embodiment of the invention.
- the front part 102a forms a thin wall/plate with overall uniform thickness (not considering the various openings that will be described hereinbelow). This is not valid for the rear part 102b, which forms a plate with non-uniform thickness, superimposable (and geometrically congruent with) on the front part 102a.
- the hole 118 in order to prevent a possible unthreading of the articulation pin 103 from the (central) hole 118 of the internal link 101 and from the two opposite (lateral) holes 114 of the external link 102, aligned with each other, the hole 118 must have a diameter slightly greater than that of the holes 114 in a manner so as to create a small step of abutment of the pin 103 against the internal side (opposite the external side 111, 11 ⁇ ) of the walls of the external link 102.
- Fig. 6a shows the visible external side 111 of the front part 102a
- Fig. 6c shows the non-visible internal side of the front part 102a
- Fig. 6b is the section A- A (Fig. 6a) of the front part 102a.
- Fig. 7a shows the non-visible internal side (see Fig. 3) of the rear part 102b
- Fig. 7c shows the visible external side 111' of the rear part 102b
- Fig. 7b is the front view (direction of the arrow P, Fig. 7a) of the rear part 102b
- Fig. 7d is the respective plan view.
- Fig. 8 shows the internal link of the present invention, indicated with 1 or 101, respectively, and it does not require particular elucidations in addition to that provided above.
- fixing means are for example three screws 122 with flared head inserted in the flared holes 123 of the front part 102a which are aligned with the threaded holes 124 of the rear part 102b of the external link 102 (see Figs. 3a, 4 and 7a).
- pairs of holes 125 and 126 are provided for inserting reference pins (already known in the art and not shown in the drawings), which serve to give precision to the system.
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2014/063733 WO2016020722A1 (en) | 2014-08-06 | 2014-08-06 | Chain for saw machines for cutting ornamental stones, adapted to prevent the entrance of impurities between the internal link and the external link of the chain |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3177443A1 true EP3177443A1 (en) | 2017-06-14 |
EP3177443B1 EP3177443B1 (en) | 2018-09-19 |
Family
ID=51627328
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14777175.2A Active EP3177443B1 (en) | 2014-08-06 | 2014-08-06 | Chain for saw machines for cutting ornamental stones, adapted to prevent the entrance of impurities between the internal link and the external link of the chain |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3177443B1 (en) |
ES (1) | ES2702641T3 (en) |
WO (1) | WO2016020722A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201700030399A1 (en) * | 2017-03-20 | 2018-09-20 | Fantini Sud Spa | SELF-CLEANING CHAIN WITH EXTERNAL KNITTING MODULAR FOR CHAIN SAWING MACHINES OF ORNAMENTAL STONES. |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE706560C (en) * | 1936-03-05 | 1941-05-29 | Ludwig Lacher Dipl Ing | Saw chain fitted with cutting teeth made of high quality material |
US2762227A (en) * | 1954-03-01 | 1956-09-11 | Tweedie Charles James | Saw chain linkage |
US5226404A (en) * | 1989-09-22 | 1993-07-13 | Mitsubishi Metal Corporation | Cutting apparatus |
US5123400A (en) * | 1991-06-20 | 1992-06-23 | Blount, Inc. | Saw chain having headless fastener |
DE4237781C2 (en) * | 1992-11-09 | 1995-08-10 | Elektromechanik Aach Gmbh | Saw chain for chainsaws |
IT1302903B1 (en) * | 1998-12-04 | 2000-10-10 | Fantini Sud Srl | PERFECTED CUTTING CHAIN, FOR MARBLE SAWING MACHINES OR OTHER STONE ORNAMENTS. |
ITRM20060533A1 (en) * | 2006-10-05 | 2008-04-06 | Fantini Sud S P A | PERFECTED CHAIN FOR ORNAMENTAL STONE SAWS NOT USING THE LOCKING PINS OF THE ARTICULATION PIN |
-
2014
- 2014-08-06 WO PCT/IB2014/063733 patent/WO2016020722A1/en active Application Filing
- 2014-08-06 EP EP14777175.2A patent/EP3177443B1/en active Active
- 2014-08-06 ES ES14777175T patent/ES2702641T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2016020722A1 (en) | 2016-02-11 |
EP3177443B1 (en) | 2018-09-19 |
ES2702641T3 (en) | 2019-03-04 |
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