EP0712950B1 - Joint, with fast engagement and release, for coupling the control linkage to the heald frames of looms - Google Patents
Joint, with fast engagement and release, for coupling the control linkage to the heald frames of looms Download PDFInfo
- Publication number
- EP0712950B1 EP0712950B1 EP95117429A EP95117429A EP0712950B1 EP 0712950 B1 EP0712950 B1 EP 0712950B1 EP 95117429 A EP95117429 A EP 95117429A EP 95117429 A EP95117429 A EP 95117429A EP 0712950 B1 EP0712950 B1 EP 0712950B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- joint
- frames
- guide elements
- coupling
- levers
- 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.)
- Expired - Lifetime
Links
- 230000008878 coupling Effects 0.000 title claims description 9
- 238000010168 coupling process Methods 0.000 title claims description 9
- 238000005859 coupling reaction Methods 0.000 title claims description 9
- 239000000463 material Substances 0.000 claims description 5
- 239000000314 lubricant Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C9/00—Healds; Heald frames
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C1/00—Dobbies
- D03C1/14—Features common to dobbies of different types
- D03C1/144—Features common to dobbies of different types linking to the heald frame
Definitions
- the present invention concerns the weaving loom field and, in particular a joint, with fast engagement and release, for coupling to the heald frames the linkage controlling the lifting and lowering movements thereof.
- control linkage is connected to the heald frames of looms by means of end rods thereof, the big ends of which are pivoted on said frames by way of bushes. This makes very long and complicated the operations of replacing the heald frames, which - as known - are quite frequent in looms.
- a joint according to the preamble of claim 1 is known from FR-A-2 318 959.
- the present invention proposes to simplify and greatly speed up this operation by supplying a fully original joint, with fast engagement and release, for coupling to the heald frames of looms the end connecting rods of the control linkage for said frames, said joint being characterized in that it comprises: tailpieces with a C-shaped seat projecting from the bottom of the frames; levers with a hook end apt to engage into said seat and the other end of which is pivoted onto the big end of the end connecting rods of the linkage; and guide elements of plastic material apt to perform only vertical movements and to contain said levers, said guide elements comprising an upper end pocket to house said tailpieces and allow them to move horizontalwise in respect of the hook ends of said levers.
- Said pocket of the guide elements is suitably filled with lubricant, while said connecting rods are formed as forks containing the guide elements and are partially housed into the same.
- the various guide elements are in direct mutual contact and they are free to perform movements one in respect of the other.
- Fig. 1 shows diagrammatically, in a loom, the transmission of the lifting and lowering controls from a shedding machine to a heald frame, by means of a linkage wherein the end rods are connected to said frame by way of joints according to the present invention.
- Figs. 2 and 3 show, on an enlarged scale, one of said joints in a position connected to the heald frame and, respectively, in a position disconnected therefrom which either precedes or follows the position of connection to said frame;
- Figs. 4 and 5 are top plan views of the pack of heald frames of a loom showing, respectively, the connected and disconnected positions of the linkage corresponding to figs. 2 and 3.
- the coupling of the end rods 6 of the linkage 3 to the heald frame 2 is obtained through joints 7, of the type with fast engagement and release, illustrated more clearly in figs. 2 and 3.
- Each of said joints 7 comprises: a tailpiece 8, projecting from the bottom of the frame 2 to which it is rigidly fixed; a hook lever 9 pivoted to the big end of the connecting rod 6; and a guide element 10 of plastic material cooperating with said tailpiece 8, with said lever 9 and with said rod 6.
- the tailpiece 8 is formed with a C-shaped seat 11, apt to house the correspondingly shaped hook end 12 of the lever 9, which can be fitted therein or disengaged therefrom by a simple horizontal sliding movement.
- the lever 9 is housed into the guide element 10 which comprises at the top a pocket 13, into which is positioned the hook end 12 of said lever 9 and into which can be housed, to the side of said hook end 12, the frame tailpiece 8.
- the guide element 10 is apt to perform only vertical movements, being housed between fixed vertical guides 14.
- the connecting rod 6 - the small end of which is pivoted to the toggle lever 5 - contains the lower part of said guide element 10, being formed as a fork with its big end pivoted to the hook lever 9. At the same time, the rod 6 is partially housed into the element 10 which comprises undercuts suited for the purpose.
- each heald frame 2 is provided with two joints 7 for coupling to the respective control linkage 3, the loom being equipped with a pack of adjacent frames 2, each moved by a linkage 3.
- the guide elements 10 are positioned side-by-side in direct mutual contact - as shown in figs. 4 and 5 - since there are no interferences between the single hook levers 9 and between the single connecting rods 6 associated thereto, which are housed - as seen - into appropriate seats and/or undercuts of said elements 10. Because of the arrangement adopted, the guide elements 10 do not require the use of the conventional rack of known technique. It is hence possible to advantageously obtain a very compact structure. Although the guide elements, thus arranged, slide one against the other during loom operation - according to the lifting and lowering movements imparted on the single heald frames - this involves no problems, since the friction between the contacting surfaces of said elements is very limited due to the nature of the plastic material from which they are made.
- each heald frame can be very rapidly connected to the respective linkage by a simple vertical movement, causing the insertion of the tailpieces 8 into the pockets 13 of the guide elements 10, followed by a horizontal movement, causing the engagement of the hook ends 12 into the seats 11 of said tailpieces 8: both said movements can be obtained by shifting the whole pack of frames 2 in respect of the sets of guide elements 10 and of the hook levers 9.
- the disconnection of the heald frames from the respective linkages is obtained - just as simply and rapidly - by two movements imparted in an order and direction opposite to the previous ones.
- the coupling between the heald frames and the respective control linkages is obtained - according to the invention - by way of members (the hook levers 9) directly connected to the end rods (6) of said linkages, with very light guide elements (10 in 14) which are not subject to the lifting and lowering loads of said frames.
- Said coupling is moreover favoured by the presence of a complete and permanent lubrication, while low frictions are produced between the non-lubricated reciprocally slidable parts, with evident advantages as far as loom operation taking into account the high speeds of the mechanical members involved.
- the joint of the present invention is particularly efficient and reliable, long-lasting and of limited cost.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
Description
The present invention concerns the weaving loom field and, in
particular a joint, with fast engagement and release, for coupling to the
heald frames the linkage controlling the lifting and lowering movements
thereof.
It is known that, according to conventional technique, the control
linkage is connected to the heald frames of looms by means of end rods
thereof, the big ends of which are pivoted on said frames by way of
bushes. This makes very long and complicated the operations of replacing
the heald frames, which - as known - are quite frequent in looms.
A joint according to the preamble of claim 1 is known from FR-A-2 318 959.
The present invention proposes to simplify and greatly speed up
this operation by supplying a fully original joint, with fast engagement
and release, for coupling to the heald frames of looms the end connecting
rods of the control linkage for said frames, said joint being characterized
in that it comprises: tailpieces with a C-shaped seat projecting from
the bottom of the frames; levers with a hook end apt to engage into said
seat and the other end of which is pivoted onto the big end of the end
connecting rods of the linkage; and guide elements of plastic material
apt to perform only vertical movements and to contain said levers, said
guide elements comprising an upper end pocket to house said tailpieces
and allow them to move horizontalwise in respect of the hook ends of said
levers.
Said pocket of the guide elements is suitably filled with lubricant,
while said connecting rods are formed as forks containing the guide
elements and are partially housed into the same. The various guide elements
are in direct mutual contact and they are free to perform movements
one in respect of the other.
The invention will now be described in further detail with reference
to a preferred embodiment thereof, illustrated on the accompanying
drawings, in which:
Fig. 1 shows diagrammatically, in a loom, the transmission of the
lifting and lowering controls from a shedding machine to a heald frame,
by means of a linkage wherein the end rods are connected to said frame by
way of joints according to the present invention.
Figs. 2 and 3 show, on an enlarged scale, one of said joints in a
position connected to the heald frame and, respectively, in a position
disconnected therefrom which either precedes or follows the position of
connection to said frame; and
Figs. 4 and 5 are top plan views of the pack of heald frames of a
loom showing, respectively, the connected and disconnected positions of
the linkage corresponding to figs. 2 and 3.
As diagrammatically illustrated in fig. 1 of the drawings, the
transmission - in a loom - of the lifting and lowering controls from a
shedding machine 1 to a heald frame 2 is obtained, in known manner, by
means of a linkage 3 with an adjustable articulated head 4, wherein
toggle levers 5 operate end connecting rods 6.
According to the invention, the coupling of the end rods 6 of the
linkage 3 to the heald frame 2 is obtained through joints 7, of the type
with fast engagement and release, illustrated more clearly in figs. 2 and
3.
Each of said joints 7 comprises: a tailpiece 8, projecting from the
bottom of the frame 2 to which it is rigidly fixed; a hook lever 9 pivoted
to the big end of the connecting rod 6; and a guide element 10 of
plastic material cooperating with said tailpiece 8, with said lever 9 and
with said rod 6.
The tailpiece 8 is formed with a C-shaped seat 11, apt to house the
correspondingly shaped hook end 12 of the lever 9, which can be fitted
therein or disengaged therefrom by a simple horizontal sliding movement.
The lever 9 is housed into the guide element 10 which comprises at
the top a pocket 13, into which is positioned the hook end 12 of said
lever 9 and into which can be housed, to the side of said hook end 12,
the frame tailpiece 8. The guide element 10 is apt to perform only
vertical movements, being housed between fixed vertical guides 14. The
connecting rod 6 - the small end of which is pivoted to the toggle lever
5 - contains the lower part of said guide element 10, being formed as a
fork with its big end pivoted to the hook lever 9. At the same time, the
rod 6 is partially housed into the element 10 which comprises undercuts
suited for the purpose.
As can be seen in fig. 1, each heald frame 2 is provided with two
joints 7 for coupling to the respective control linkage 3, the loom being
equipped with a pack of adjacent frames 2, each moved by a linkage 3.
The guide elements 10, light and economic, are positioned side-by-side
in direct mutual contact - as shown in figs. 4 and 5 - since there
are no interferences between the single hook levers 9 and between the
single connecting rods 6 associated thereto, which are housed - as seen -
into appropriate seats and/or undercuts of said elements 10. Because of
the arrangement adopted, the guide elements 10 do not require the use of
the conventional rack of known technique. It is hence possible to advantageously
obtain a very compact structure. Although the guide elements,
thus arranged, slide one against the other during loom operation -
according to the lifting and lowering movements imparted on the single
heald frames - this involves no problems, since the friction between the
contacting surfaces of said elements is very limited due to the nature of
the plastic material from which they are made.
It should finally be noted - see figs. 2 and 3 - that the pivoting
shaft 15 of the toggle levers 5 is mounted on eccentric pins 16 to allow,
when required, the simultaneous lifting or lowering of all the heald
frames 2.
The coupling between the linkages 3 and the frames 2 can be easily
removed and reset - thanks to the joints with fast engagement and release
of the present invention - by operating, not singly on each frame, but
simultaneously on the whole pack of frames. In fact, each heald frame can
be very rapidly connected to the respective linkage by a simple vertical
movement, causing the insertion of the tailpieces 8 into the pockets 13
of the guide elements 10, followed by a horizontal movement, causing the
engagement of the hook ends 12 into the seats 11 of said tailpieces 8:
both said movements can be obtained by shifting the whole pack of frames
2 in respect of the sets of guide elements 10 and of the hook levers 9.
The disconnection of the heald frames from the respective linkages is
obtained - just as simply and rapidly - by two movements imparted in an
order and direction opposite to the previous ones.
Each time one operates the replacement of a pack of frames in the
loom, it will be a good rule to fill with lubricant the pockets 13 of the
plastic guide elements 10, so as to favour the engagement and release
between the tailpieces 8 and the hook ends 12 of the levers 9.
When wishing to obtain the simultaneous lifting or lowering of all
the heald frames 2, it is sufficient to impart a suitable rotation on the
eccentric pins 16 of the pivoting shafts 15 of the toggle levers 5.
As can be seen, the coupling between the heald frames and the respective
control linkages is obtained - according to the invention - by
way of members (the hook levers 9) directly connected to the end rods (6)
of said linkages, with very light guide elements (10 in 14) which are not
subject to the lifting and lowering loads of said frames. Said coupling
is moreover favoured by the presence of a complete and permanent lubrication,
while low frictions are produced between the non-lubricated reciprocally
slidable parts, with evident advantages as far as loom operation
taking into account the high speeds of the mechanical members involved.
It should finally be noted that, besides providing a fast and
simple engagement and release of the heald frames from their control
linkage, the joint of the present invention is particularly efficient and
reliable, long-lasting and of limited cost.
Claims (4)
- Joint, with fast engagement and release, for coupling to the heald frames (2) of looms the end connecting rods (6) of the control linkage (3) for said frames, characterized in that it comprises: tailpieces (8) with a C-shaped seat (11) projecting from the bottom of the frames (2); levers (9) with a hook end (12) apt to engage into said seat (11) and the other end of which is pivoted onto the big end of said connecting rods (6); and guide elements (10) of plastic material apt to perform only vertical movements and to contain said levers (9), said guide elements (10) comprising an upper end pocket (13) to house said tailpieces (8) and allow them to move horizontalwise in respect of the hook ends (12) of said levers (9).
- Joint as in claim 1), wherein said pocket (13) is filled with lubricant.
- Joint as in claims 1) or 2), wherein said connecting rods (6) are formed as forks containing said guide elements (10) and are partially housed into the same.
- Joint as in any one of claims 1) to 3), wherein said guide elements (10) of plastic material are in direct mutual contact.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI942331 | 1994-11-17 | ||
| ITMI942331A IT1270707B (en) | 1994-11-17 | 1994-11-17 | CONNECTION WITH HOOKING AND RELEASE OF A QUICK TYPE OF TIE-RODS TO THE FRAMEWORK OF LICCI IN WEAVING FRAMES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0712950A1 EP0712950A1 (en) | 1996-05-22 |
| EP0712950B1 true EP0712950B1 (en) | 1998-08-12 |
Family
ID=11369869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95117429A Expired - Lifetime EP0712950B1 (en) | 1994-11-17 | 1995-11-06 | Joint, with fast engagement and release, for coupling the control linkage to the heald frames of looms |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0712950B1 (en) |
| JP (1) | JP3720100B2 (en) |
| DE (1) | DE69504013T2 (en) |
| IT (1) | IT1270707B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19640370C1 (en) * | 1996-09-30 | 1998-02-12 | Dornier Gmbh Lindauer | Assemblies to hold and guide loom shaft rods |
| DE10312118A1 (en) * | 2003-03-17 | 2004-09-30 | Picanol N.V. | Shaft drive for a weaving machine |
| KR100837207B1 (en) * | 2007-05-11 | 2008-06-11 | 장지수 | Heald frames height control guidance device of loom |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH451040A (en) * | 1966-06-13 | 1968-05-15 | Egelhaaf C C Fa | Shaft lifting device |
| CH488830A (en) * | 1968-03-28 | 1970-04-15 | Sulzer Ag | Device for coupling a heald frame with reciprocating drive plates |
| IT1081221B (en) * | 1975-07-23 | 1985-05-16 | Sulzer Ag | WEAVING MACHINE WITH LICCIO TO MOVE THE PITCH FORMING DEVICE |
-
1994
- 1994-11-17 IT ITMI942331A patent/IT1270707B/en active IP Right Grant
-
1995
- 1995-11-06 DE DE69504013T patent/DE69504013T2/en not_active Expired - Fee Related
- 1995-11-06 EP EP95117429A patent/EP0712950B1/en not_active Expired - Lifetime
- 1995-11-15 JP JP29701395A patent/JP3720100B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ITMI942331A0 (en) | 1994-11-17 |
| DE69504013T2 (en) | 1999-01-28 |
| ITMI942331A1 (en) | 1996-05-17 |
| IT1270707B (en) | 1997-05-07 |
| DE69504013D1 (en) | 1998-09-17 |
| EP0712950A1 (en) | 1996-05-22 |
| JP3720100B2 (en) | 2005-11-24 |
| JPH08209481A (en) | 1996-08-13 |
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