EP0768404A1 - Healdframe of a weaving machine - Google Patents
Healdframe of a weaving machine Download PDFInfo
- Publication number
- EP0768404A1 EP0768404A1 EP96115117A EP96115117A EP0768404A1 EP 0768404 A1 EP0768404 A1 EP 0768404A1 EP 96115117 A EP96115117 A EP 96115117A EP 96115117 A EP96115117 A EP 96115117A EP 0768404 A1 EP0768404 A1 EP 0768404A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- healdframe
- frame
- heald rods
- heald
- rods
- 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.)
- Withdrawn
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C9/00—Healds; Heald frames
- D03C9/06—Heald frames
- D03C9/0608—Construction of frame parts
- D03C9/0616—Horizontal upper or lower rods
- D03C9/0625—Composition or used material
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C9/00—Healds; Heald frames
- D03C9/06—Heald frames
- D03C9/0608—Construction of frame parts
- D03C9/065—Side stays
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C9/00—Healds; Heald frames
- D03C9/06—Heald frames
- D03C9/0683—Arrangements or means for the linking to the drive system
Definitions
- the invention relates to a healdframe of a weaving machine.
- the healdframe consists of a closed flat rectangular frame made of metal or composite material beams carrying healds with drawn-in warp threads.
- the warp threads are drawn-in from a warp beam via a back rail into heald eyes.
- a plurality of healdframes situated after each other and positioned transversely to warp threads.
- the repeated reciprocating up and down movement of the healdframes provides for the opening of the warp and for creating the shed for the insertion of the weft that is then beaten-up by the beat-up reed to the face of the fabric being produced.
- the frame proper of the healdframe consists of an upper and a lower heald rod, parallel to each other and made as beams fastened with their ends into vertical side walls.
- heald wires on which the healds are fixed To the upper and lower heald rods are fixed by means of fastening elements heald wires on which the healds are fixed.
- the alternating reciprocating movement of healdframes with healds is actuated by a shed mechanism consisting of a system of cams, eccentrics or of a multi-link crank mechanism, and is transmitted then by means of tie rods and hinges to each healdframe.
- a multi-link shed mechanism the healdframes are driven by separate heald machines arranged at the side of the machine or over it. The weaving machine has then healdframes with lower and/or lower pull.
- the healdframe construction is exposed in particular to dynamic forces due to the weight of both the healdframe and of the healds.
- the play existing between the elements of the shed mechanism consisting of levers and other elements imposes additional impact stress both on the healdframe and on the shed mechanism proper.
- healdframes By far most of the healdframes in use carry on their frame one row of healds mounted on heald wires.
- Another known solution has a doubled healdframe with specially shaped healds drawn-in at the warp edges only.
- These specially shaped healds provided in a limited number on each warp end, fulfil the function of edge entwining members for reinforcing the edges of the fabric being produced.
- the heald elements used are made of heat treated hardened carbon material and are not intended to draw-in the whole of the warp width.
- the healds are in this construction mounted, not in the heald wires, not being adapted to it, but directly in the shaped elements of the frame.
- Such doubled healdframe can carry only a limited number of light-weight edge healds generating very small inertia forces.
- These edge healds are not intended to create the shed in the warp thread width but, on the contrary,to cross them and thus to bind the weft inserted and to reinforce the edges of the fabric in process of formation.
- a very often recurring problem is the space available for the healdframe operation and thus limiting the top size of each healdframe component.
- the rigidity of the frame construction of the healdframes and the play in the shed mechanism are one of the limiting factors of the weaving machine speed.
- each of its frames consists of a couple of upper heald rods and of a couple of lower heald rods fixed in one right-side and one left-side side wall, each of these heald rod couples being mutually connected.
- This connection is provided for by transverse pins or, alternatively, as a glued connection.
- hinges On the side walls of the healdframe frame, outside the longitudinal axis of the side walls, there are mounted hinges providing for a drive connection with the shed mechanism, with an elastic buffer interposed between the shed mechanism and the healdframe frame, i.e., either between the hinge and the shed mechanism or between the side wall of the frame and its hinge.
- the advantage of the healdframe according to the invention consists in its increased rigidity and strength enabling it to bear higher dynamic stress and, consequently, higher operating speed of the machine. Another advantage consists in that the forces transmitted by the shed mechanism pass, not via the heald rods, but via the hinges situated on the side wall of the healdframe. Due to this, the heald rods receive no additional stress from the shed mechanism.
- Still another advantage consists in the interconnection of the heald frame with the shed mechanism via the elastic buffer thus damping the impacts and improving the course of the dynamic forces transmitted from the frame to the shed mechanism and, consequently, reducing the stress imposed on it and increasing its service life.
- healdframe according to the invention consists in that it permits to simplify the shed mechanism by reducing its elements due to the reduction in healdframe number on the weaving machine.
- a rectangular frame 1 of a healdframe consists of a couple of upper heald rods 2 and of a couple of lower heald rods 3 fixed by their extremities in side walls 4 .
- Each pair of the upper heald rods 2 and each Pair of the lower heald rods 3 in the frame 1 is in tight mutual contact throughout its length and is mutually firmly fixed together by means of transverse pins 5 provided equidistantly in the frame length.
- this connection of the couples of the upper heald rods 2 and of the lower heald rods 3 can be made as a not represented glue connection.
- On the inner side of the rectangular frame 1 each upper heald rod 2 and each lower heald rod 3 is fitted for instance with riders 6 used to receive heald wires 7 .
- the heald wires 7 carry healds 8 so arranged as to form in each healdframe two rows of a set, positioned in parallel after each other. This permits to draw-in double the amount of not represented warp threads into each healdframe.
- Each frame 1 of the healdframe is guided by its side walls 4 in a not shown guide.
- On the outer sides of the side walls 4 are fixed hinges 9 for connecting levers 10 of a shed mechanism 11 .
- an annulus-shaped elastic buffer 13 is interposed between a pin 12 of the hinge 9 and the mounted lever 10 .
- the elastic buffer 13 is interposed between the side wall 4 of the frame 1 and the flat part of the hinge 9 .
- the lever 10 is connected directly to the support pin 12 of the hinge 9 .
- each healdframe is led in a not shown guide and oscillates transversely to the not represented warp threads thus producing their shed permitting the insertion of a not represented weft.
- Each healdframe according to the invention has two rows of healds situated after each other and thus fulfils the function of two healdframes of the prior art embodiment. This results in the simplification of the shed mechanism 11 and in the reduction in the number of its components including the lever 10 .
- the impacts due to the play existing in the shed mechanism 11 are reduced by the elastic buffer 13 absorbing the impacts and helping a better distribution of the dynamic forces of the healdframe.
- the hinges 9 can be placed at another than represented length section of the side walls 4 , for instance in their extremities in order to improve the not represented lateral guiding.
- the elastic buffer 13 is not limited to the rubber spring, given as an example of embodiment, but can be made as an equivalent construction such as thin metal string, deformation member, etc.
- the healdframe according to the invention permits to increase the operation speed of the weaving machine and is intended to be used in particular in high speed weaving machines.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
Description
- The invention relates to a healdframe of a weaving machine. The healdframe consists of a closed flat rectangular frame made of metal or composite material beams carrying healds with drawn-in warp threads. The warp threads are drawn-in from a warp beam via a back rail into heald eyes.
- In each case, there is provided in a veawing machines a plurality of healdframes, situated after each other and positioned transversely to warp threads. The repeated reciprocating up and down movement of the healdframes provides for the opening of the warp and for creating the shed for the insertion of the weft that is then beaten-up by the beat-up reed to the face of the fabric being produced. Depending on the density of the warp and of the woven warp weave, more than only two healdframes are required on the weaving machine. The frame proper of the healdframe consists of an upper and a lower heald rod, parallel to each other and made as beams fastened with their ends into vertical side walls. To the upper and lower heald rods are fixed by means of fastening elements heald wires on which the healds are fixed. The alternating reciprocating movement of healdframes with healds is actuated by a shed mechanism consisting of a system of cams, eccentrics or of a multi-link crank mechanism, and is transmitted then by means of tie rods and hinges to each healdframe. In a multi-link shed mechanism, the healdframes are driven by separate heald machines arranged at the side of the machine or over it. The weaving machine has then healdframes with lower and/or lower pull.
- In operation, the healdframe construction is exposed in particular to dynamic forces due to the weight of both the healdframe and of the healds. The play existing between the elements of the shed mechanism consisting of levers and other elements imposes additional impact stress both on the healdframe and on the shed mechanism proper.
- By far most of the healdframes in use carry on their frame one row of healds mounted on heald wires. However, known are also constructions having two heald rows on a healdframe consisting of a couple of heald rods arranged over each other and fixed to the right-side and left-side side walls. This arrangement has been chosen to spare the healdframes at high warp thread density.
- The drawback of this solution consists in the fact that the drawing-in of the double amount of warp threads on the traditional healdframe leads to an increased and thus disproportionate strain on the healdframe for which the healdframe has not been designed. The inertial forces rise exponentially, and the healdframes receive during their reciprocating movement also lateral oscillations thus increasing the friction in their side guiding. Not only the noise level during the weaving but also the healdframe wear are increased in this way resulting in the risk of damage not only to the frame proper of the healdframe but also to each element of the shed mechanism on which such strain is transmitted. For this reason, this solution is applicable in low running weaving machines.
- Another known solution, disclosed in the US patent No. 4 572 241, has a doubled healdframe with specially shaped healds drawn-in at the warp edges only. These specially shaped healds, provided in a limited number on each warp end, fulfil the function of edge entwining members for reinforcing the edges of the fabric being produced. The heald elements used are made of heat treated hardened carbon material and are not intended to draw-in the whole of the warp width. The healds are in this construction mounted, not in the heald wires, not being adapted to it, but directly in the shaped elements of the frame. Such doubled healdframe can carry only a limited number of light-weight edge healds generating very small inertia forces. These edge healds are not intended to create the shed in the warp thread width but, on the contrary,to cross them and thus to bind the weft inserted and to reinforce the edges of the fabric in process of formation.
- A very often recurring problem is the space available for the healdframe operation and thus limiting the top size of each healdframe component.
- The rigidity of the frame construction of the healdframes and the play in the shed mechanism are one of the limiting factors of the weaving machine speed.
- The above drawbacks are to a considerable extent eliminated by the healdframe according to the present invention whose principle consists in that each of its frames consists of a couple of upper heald rods and of a couple of lower heald rods fixed in one right-side and one left-side side wall, each of these heald rod couples being mutually connected. This connection is provided for by transverse pins or, alternatively, as a glued connection. On the side walls of the healdframe frame, outside the longitudinal axis of the side walls, there are mounted hinges providing for a drive connection with the shed mechanism, with an elastic buffer interposed between the shed mechanism and the healdframe frame, i.e., either between the hinge and the shed mechanism or between the side wall of the frame and its hinge.
- The advantage of the healdframe according to the invention consists in its increased rigidity and strength enabling it to bear higher dynamic stress and, consequently, higher operating speed of the machine. Another advantage consists in that the forces transmitted by the shed mechanism pass, not via the heald rods, but via the hinges situated on the side wall of the healdframe. Due to this, the heald rods receive no additional stress from the shed mechanism.
- Still another advantage consists in the interconnection of the heald frame with the shed mechanism via the elastic buffer thus damping the impacts and improving the course of the dynamic forces transmitted from the frame to the shed mechanism and, consequently, reducing the stress imposed on it and increasing its service life.
- A substantial advantage of the healdframe according to the invention consists in that it permits to simplify the shed mechanism by reducing its elements due to the reduction in healdframe number on the weaving machine.
- All this permits to increase the operating speed of the weaving machine.
-
- Fig. 1
- is a general perspective view of the healdframe according to the invention,
- Fig. 2
- is a detail of the cross section in the area of heald rod connection,
- Figs. 3 and 4
- are variants of the interconnection between the frame and the shed mechanism in a detailed perspective view.
- A
rectangular frame 1 of a healdframe consists of a couple ofupper heald rods 2 and of a couple of lower heald rods 3 fixed by their extremities inside walls 4. Each pair of theupper heald rods 2 and each Pair of the lower heald rods 3 in theframe 1 is in tight mutual contact throughout its length and is mutually firmly fixed together by means oftransverse pins 5 provided equidistantly in the frame length. Alternatively, this connection of the couples of theupper heald rods 2 and of the lower heald rods 3 can be made as a not represented glue connection. On the inner side of therectangular frame 1, eachupper heald rod 2 and each lower heald rod 3 is fitted for instance withriders 6 used to receiveheald wires 7. - In this way, two mutually parallel couples of the
heald wires 7 are positioned opposite each other on the inner side of theframe 1. Theheald wires 7 carryhealds 8 so arranged as to form in each healdframe two rows of a set, positioned in parallel after each other. This permits to draw-in double the amount of not represented warp threads into each healdframe. Eachframe 1 of the healdframe is guided by itsside walls 4 in a not shown guide. On the outer sides of theside walls 4 are fixedhinges 9 for connectinglevers 10 of ashed mechanism 11. In the embodiment shown in Fig. 3, an annulus-shapedelastic buffer 13 is interposed between apin 12 of thehinge 9 and the mountedlever 10. In the embodiment shown in Fig. 4, theelastic buffer 13 is interposed between theside wall 4 of theframe 1 and the flat part of thehinge 9. Here, thelever 10 is connected directly to thesupport pin 12 of thehinge 9. - During the weaving, each healdframe is led in a not shown guide and oscillates transversely to the not represented warp threads thus producing their shed permitting the insertion of a not represented weft. Each healdframe according to the invention has two rows of healds situated after each other and thus fulfils the function of two healdframes of the prior art embodiment. This results in the simplification of the
shed mechanism 11 and in the reduction in the number of its components including thelever 10. During the weaving, the impacts due to the play existing in theshed mechanism 11 are reduced by theelastic buffer 13 absorbing the impacts and helping a better distribution of the dynamic forces of the healdframe. - The
hinges 9 can be placed at another than represented length section of theside walls 4, for instance in their extremities in order to improve the not represented lateral guiding. - The
elastic buffer 13 is not limited to the rubber spring, given as an example of embodiment, but can be made as an equivalent construction such as thin metal string, deformation member, etc. - The healdframe according to the invention permits to increase the operation speed of the weaving machine and is intended to be used in particular in high speed weaving machines.
-
- 1
- frame of the healdframe
- 2
- upper heald rod
- 3
- lower held rod
- 4
- side wall
- 5
- pin
- 6
- rider
- 7
- heald wire
- 8
- heald
- 9
- hinge
- 10
- lever
- 11
- shed mechanism
- 12
- pin
- 13
- elastic buffer
Claims (8)
- A healdframe of a weaving machine whose frame consists of heald rods situated over each other and fixed in side walls, the frame being in drive connection with a shed mechanism, each frame comprising two rows of healds situated one after the other along the whole of the weaving width,
characterized by that
each frame (1) of the healdframe consists of a couple of upper heald rods (2) and of a couple of lower heald rods (3) fixed into one right-side side wall (4) and into one left-side side wall (4). - A healdframe as claimed in Claim 1, characterized by that each couple of upper heald rods (2) and each couple of lower heald rods (3) is mutually interconnected.
- A healdframe as claimed in Claim 2, characterized by that the upper heald rods (2) and, as the case may be, also the lower heald rods (3), are in the frame (1) connected by transverse pins (5).
- A healdframe as claimed in Claim 2, characterized by that the upper heald rods (2) and, as the case may be, also the lower heald rods (3) are in the frame (1) connected by a glue connection.
- A healdframe as claimed in Claim 3 or 4, characterized by that the side walls (4) of the frame (1) are fitted with hinges (9) situated outside the longitudinal axis of the side walls and serving to establish a drive connection with the shed mechanism (11).
- A healdframe as claimed in Claim 5, characterized by that the frame (1) of the healdframe is connected with the shed mechanism (11) via an elastic buffer (13).
- A healdframe as claimed in Claim 5, characterized by that the elastic buffer (13) is interposed between the hinge (9) and the shed mechanism (11).
- A healdframe as claimed in Claim 5, characterized by that the elastic buffer (13) is interposed between the side wall (4) of the frame (1) and the hinge (9).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CZ952527A CZ252795A3 (en) | 1995-09-29 | 1995-09-29 | Heald shaft of a weaving machine |
CZ252795 | 1995-09-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0768404A1 true EP0768404A1 (en) | 1997-04-16 |
Family
ID=5465121
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96115117A Withdrawn EP0768404A1 (en) | 1995-09-29 | 1996-09-20 | Healdframe of a weaving machine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0768404A1 (en) |
CZ (1) | CZ252795A3 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1887326A (en) * | 1930-05-24 | 1932-11-08 | Ragan Ralph | Heddle frame for looms |
US2808073A (en) * | 1955-02-04 | 1957-10-01 | Pioneer Heddle And Reed Compan | Heddle frames |
GB829751A (en) * | 1956-02-03 | 1960-03-09 | Iwajiro Maruyama | Improvements in or relating to heald frames |
FR2330787A1 (en) * | 1975-11-05 | 1977-06-03 | Egelhaaf C C | Loom shafts for weaving two fabrics - have heald eyelets for warps vertically displaced on common healds to simplify drawing in warps |
CH623364A5 (en) * | 1977-11-16 | 1981-05-29 | Sulzer Ag | Heald-frame drive for weaving machines. |
EP0297003A1 (en) * | 1987-06-26 | 1988-12-28 | S.A. DES ETABLISSEMENTS STAUBLI (France) | Device for coupling heald frames to the transmission elements of a dobby |
-
1995
- 1995-09-29 CZ CZ952527A patent/CZ252795A3/en unknown
-
1996
- 1996-09-20 EP EP96115117A patent/EP0768404A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1887326A (en) * | 1930-05-24 | 1932-11-08 | Ragan Ralph | Heddle frame for looms |
US2808073A (en) * | 1955-02-04 | 1957-10-01 | Pioneer Heddle And Reed Compan | Heddle frames |
GB829751A (en) * | 1956-02-03 | 1960-03-09 | Iwajiro Maruyama | Improvements in or relating to heald frames |
FR2330787A1 (en) * | 1975-11-05 | 1977-06-03 | Egelhaaf C C | Loom shafts for weaving two fabrics - have heald eyelets for warps vertically displaced on common healds to simplify drawing in warps |
CH623364A5 (en) * | 1977-11-16 | 1981-05-29 | Sulzer Ag | Heald-frame drive for weaving machines. |
EP0297003A1 (en) * | 1987-06-26 | 1988-12-28 | S.A. DES ETABLISSEMENTS STAUBLI (France) | Device for coupling heald frames to the transmission elements of a dobby |
Also Published As
Publication number | Publication date |
---|---|
CZ252795A3 (en) | 1997-04-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE CH DE IT LI |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: RYDVAL, MIROSLAV, ING. Inventor name: MLYNAR, JIRI, ING. Inventor name: VITAK, JOSEF, ING. Inventor name: PODZIMEK, JAROSLAV, ING. |
|
17P | Request for examination filed |
Effective date: 19971009 |
|
17Q | First examination report despatched |
Effective date: 19980303 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19980714 |