GB2305444A - Heald control mechanism for a loom - Google Patents
Heald control mechanism for a loom Download PDFInfo
- Publication number
- GB2305444A GB2305444A GB9519616A GB9519616A GB2305444A GB 2305444 A GB2305444 A GB 2305444A GB 9519616 A GB9519616 A GB 9519616A GB 9519616 A GB9519616 A GB 9519616A GB 2305444 A GB2305444 A GB 2305444A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heald control
- heald
- rod
- operating
- control assembly
- 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- Withdrawn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
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C3/00—Jacquards
- D03C3/20—Electrically-operated jacquards
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
A heald control assembly for a loom, e.g. for weaving carpets, comprises a support (1) in which heald-control rods (33) are slidably guided in apertures (31) for reciprocation and operating rods (25) respectively associated with the control rods are guided in transverse apertures (29) in the support and selectively displaceable by means such as solenoids (11) so as either to block movement of the associated control rods or to allow such movement. The armatures (23) of the solenoids may be latched in their end positions by means of steel sheets (7,9) or by permanent magnets. The support (1) and side panels (3) are reciprocated relative to a base plate (37).
Description
HEALD CONTROL ASSEMBLY
The present invention relates to a heald control assembly for a weaving loom. The loom may be, for example, a carpet weaving loom, but the invention is not limited to carpet weaving looms.
In jacquard fabric looms, cards are used to determine the movement of the warp threads to an upper or a lower position in order to create a desired weave pattern, the warp threads passing through eyelets in oscillatable healds. In jacquard carpet looms, the cards are used to determine the colour of the pile inserted into the carpet in order to create a desired pattern in the carpet. The heald control assembly incorporates a plurality of heald control rods which interact with the cards in order to transfer the pattern encoded on the cards to the fabric, carpet or the like.
The cards required for a jacquard loom are inconvenient in that each separate pattern requires to be encoded onto a separate set of cards. This can require the storage of a large number of sets of cards in order to be able to reproduce a particular pattern without the need each time to create a new set of cards. In the case of carpet weaving looms, the width of the carpet is often of the order of 4m and this generally requires several sets of cards to be arranged side-by-side with each set being coordinated with the others.
If the need for such a large number of sets of cards could be eliminated, with the heald control assembly being controlled, for example, by computer, the storage space would no longer be required and patterns could be created directly by computer. Such improvements would result in cost savings and improved efficiency.
It is therefore an object of the present invention to provide a heald control assembly that is not operated by cards.
According to the present invention there is provided a heald control assembly comprising: a plurality of heald control rods, each of which rods is reciprocally movable in the axial direction thereof between first and second positions, one end of each heald control rod being slidably mounted in support means; a plurality of operating rods, there being a separate operating rod associated with each heald control rod with each said operating rod having an axial direction transverse to the axial direction of the associated heald control rod, each of which operating rods is reciprocably movable in the axial direction thereof between first and second positions, one end of each operating rod being slidably mounted in support means; and means for independently moving each of said operating rods between the first and second positions thereof, the arrangement being such that, in one of the first and second positions of each operating rod, the operating rod is engageable with the associated heald control rod so as to limit movement of the heald control rod relative to the support means and, in the other of the first and second positions of each operating rod, the operating rod is not engageable with the associated heald control rod so as to permit movement of the heald control rod relative to the support means.
The support means for the heald control rods may be integral with the support means for the operating rods.
The heald control rods and the operating rods may be slidably mounted in apertures provided in the support means. The aperture for each heald control rod may be arranged substantially perpendicular to the aperture for the associated operating rod. The support means may be generally V-shaped.
Each operating rod may be engageable with the one end of the associated heald control rod.
The means for independently moving each of the operating rods may be controlled by a computer or the like and may include means for latching the operating means in at least one of, or each of, the first and second positions. The means for independently moving each of the operating rods may comprise a latchable solenoid associated with each operating rod. The operating rod may be, or may be mounted on, an armature of the solenoid. The solenoids may be arranged in an array in a sheet of electrically insulating material Alternatively, the solenoids may be arranged in an array between two sheets of magnetic or non-magnetic material. The solenoids may each be a magnetically latchable solenoid.For latching a magnetically latchable solenoid, the opposing faces of the sheet of electrically insulating material may be provided with a sheet of nonmagnetised ferromagnetic material, such as mild steel, the armature comprising a magnetised material. Alternatively, for latching a magnetically latchable solenoid, the armature may comprise a non-magnetised ferromagnetic material with a magnet, such as a permanent magnet, being arranged in the region of each end of the solenoid.
Control means for the array of solenoids may be provided on a circuit board mounted on that side of the electrically insulating material remote from the support means for the heald control rods. A layer of electrically insulating material may be positioned between the sheet of magnetic or non-magnetic material and the circuit board.
For a better understanding of the present invention and to show more clearly how it may be carried into effect reference will now be made, by way of example, to the accompanying drawings in which:
Figure 1 is a diagrammatic transverse cross-sectional view of one embodiment of a heald control apparatus according to the present invention;
Figure 2 is a transverse cross-sectional view of a magnetically latched solenoid for use in the heald control apparatus shown in Figure 1;
Figure 3 is a diagrammatic transverse cross-sectional view of another embodiment of a heald control apparatus according to the present invention; and
Figure 4 is a transverse cross-sectional view of a magnetically latched solenoid for use in the heald control apparatus shown in Figure 3.
Mechanisms for jacquard looms are well known to the skilled person and, for simplicity, only those components will be described that are required for an understanding of the present invention.
The heald control apparatus shown in Figure 1 comprises a generally inverted V-shaped frame 1, for example of brass.
The frame 1 is positioned between two side panels 3. It will be appreciated, however, that the heald control apparatus need not be used in the orientation shown, but can also be used in other orientations.
Each side panel comprises a layer 5 of electrically insulating material, such as that sold under the trade mark
DELRIN, sandwiched between two sheets 7, 9 of metal, such as 20 gauge mild steel. A side panel and the components mounted therein are shown in more detail in Figure 2.
An array of apertures is formed in the layer 5 of electrically insulating material, for example by drilling, and a coil 11 of a magnetically latched solenoid is positioned in each aperture. The coil is wound on a suitable support body 13, for example of nylon, and is centre tapped to form two independently operable coils arranged side-by-side.
Electrical connections to the coils are by way of three leads 15 (for simplicity, two only are shown in Figure 1) which pass, by way of insulating grommets 17, through apertures formed in the sheet 7 of metal on that side of the layer 5 remote from the frame 1. The leads 15 pass through an aperture formed in a layer 19 of electrically insulating material and are secured, as by soldering, in a printed circuit board 21 which carries components (not shown) for controlling operation of the magnetically latched solenoid in response to signals from a computer or the like (not shown).
Slidably mounted within the support body 13 is an armature 23 of magnetised material, the armature carrying an operating rod 25 which passes through an aperture 27 in the sheet 9 on that side of the layer 5 adjacent to the frame 1. The armature, in conjunction with the two coils, provides two operating positions for the solenoid in which the armature is magnetically attracted to, and magnetically latched by, one of the sheets 7 and 9 and is urged by energisation of one of the coils to overcome the magnetic attraction and to urge the armature to a position in which it is attracted to, and magnetically latched by, the other of the sheets 7 and 9. Movement of the armature back to the first position is effected by energisation of the other of the coils. Clearly, other coil arrangements can be used.
The operating rod 25 passes across the space between the sheet 9 and the frame 1 and is received in a laterally extending aperture 29 provided in the frame 1 and extending wholly through one of the legs of the inverted V. The magnetically latched solenoid, the operating rod and the frame are dimensioned such that the free end of the operating rod is received in the aperture 29 irrespective of the position of the armature 23 between the sheets 7 and 9.
Figure 1 only shows two magnetically latched solenoids and their associated operating rods, but it will be appreciated that an array of solenoids is provided in each side panel on either side of the frame 1. In a fabric loom, the total number of solenoids will generally correspond to the number of warp threads on the loom. However, a carpet loom has the ability to insert pile of seven colours in addition to the base colour of the carpet and in this case there will generally be seven solenoids for each warp thread on the loom.
Also provided in the frame 1 is an upright aperture 31 for each laterally extending aperture 29, each upright aperture 31 intersects with a corresponding lateral aperture substantially perpendicular thereto and extends through the frame 1 from the lower side to the upper side thereof. A heald control rod 33 is slidably mounted in each of the upright apertures 31.
The length of the operating rod 25 and the distance through which the rod is movable is such that, if a rod 25 in the left hand side panel as shown in Figure 1 is moved to its maximum extent rightwards as shown in the upper solenoid in
Figure 1, the free end of the operating rod extends across the upper end of the heald control rod 33 thereby limiting sliding movement of the rod 33 to a point where it contacts the operating rod 25 and such that, if the rod 25 is moved to its maximum extent leftwards as shown in the lower solenoid in Figure 1, the free end of the operating rod terminates short of the heald control rod 33 thereby allowing the rod 33 unrestricted sliding movement.
The lower ends of the heald control rods 33 are received in apertures 35 formed in a base plate 37, the heald control rods each being formed with an enlarged head 39 to limit upward movement of the rod relative to the plate.
In practice, the base plate 37 is stationary and the assembly of the frame 1 and the side panels 3 is movable upwardly and downwardly in the orientation of the apparatus as shown in Figure 1 relative to the base plate. However, for simplicity the configuration in which the assembly of the frame 1 and the side panels 3 is at its maximum upward extent relative to the base plate 37 is shown with the base plate and part of the heald control rod of the lower solenoid in hatched lines and the configuration in which the assembly of the frame 1 and the side panels 3 is at its maximum downward extent relative to the base plate 37 is shown with the base plate and the heald control rods in solid lines.
In operation, the heald control assembly starts with the frame 1 and the side panels 3 being at their maximum upward extent relative to the stationary base plate 37, that is in the position in which the base plate and part of the heald control rod are shown in hatched lines.
The magnetically latched solenoids are then operated under computer control in order to move the armatures 23 to the left or to the right as shown in Figures 1 and 2.
Leftwards movement in the left hand side panel or rightwards movement in the right hand panel allows unrestricted sliding movement of the heald control rod relative to the frame 1, while rightwards movement in the left hand side panel or leftwards movement in the right hand side panel inhibits upward movement of the heald control rod relative to the frame 1. Once the armatures of the solenoids have been moved to their required positions (or if they are already in such desired positions) the magnetised armature is attracted to the steel sheet 7 or 9 to latch the armature, and thus the operating rod, in position. There is, therefore, no need to maintain current flow in either part of the coil 11.
As the assembly of the frame 1 and side panels 3 is moved downwardly towards its maximum downward extent as illustrated by the solid lines of base plate 37, the heald control rod associated with the lower solenoid illustrated in Figure 1 is permitted to slide relative to the frame 1 and the head 39 of such rod remains received in the aperture provided in the base plate 1 as illustrated by solid lines in Figure 1. However, the heald control rod associated with the upper solenoid illustrated in Figure 1 is not permitted to slide upwardly relative to the frame 1 due to the position of the free end of the operating rod 25. Thus the heald control rod associated with the upper solenoid is urged downwardly relative to the base plate 37 by the free end of the operating rod 25 and the head 39 of such rod is therefore caused to protrude beneath the base plate 37.The protrusion of the head 39 of the heald control rod, or indeed the absence of such protrusion, can be used to operate a loom in the manner of a jacquard mechanism in known manner.
As the assembly of frame 1 and side panels 3 is subsequently moved upwardly towards its maximum upward extent, biasing means (not shown) retracts the head 39 of the heald control rod into the aperture in the base plate 37. It will be appreciated that such biasing means also operates to maintain a head of a heald control rod within the aperture during downward movement when the free end of the operating rod has not been extended across the top of the heald control rod.
The interior of the inverted V-shaped frame, or indeed the interior of the entire heald control assembly, can be maintained under positive air pressure to minimise the ingress of fibres and other detritus.
It will therefore be appreciated that the heald control assembly according to the present invention effectively replaces the conventional jacquard apparatus and the cards associated therewith. The computer or the like which controls operation of the assembly has the ability to store, directly or on magnetic storage media, a large number of different patterns in a relatively small space.
Moreover, changing from one pattern to another is much more simple with the aid of a computer than is the case when one set of cards has to be exchanged for another.
In the embodiment shown in Figures 3 and 4 the essential difference from the embodiment of Figures 1 and 2 lies in the construction and support of the solenoids. The same reference numbers are employed where the components of
Figures 3 and 4 are the same as or similar to the components of Figures 1 and 2.
As with the embodiment of Figures 1 and 2, the frame 1 is positioned between two side panels. However, the side panels 41 of Figures 3 and 4 are somewhat different in construction. The side panels comprise a sheet 43 of essentially non-magnetic material, such as aluminium, arranged adjacent to the frame. At least one of the sheets 43 is formed with an array of generally circular recesses on that side thereof remote from the frame for receiving one end of each of an array of solenoids 45 (for clarity, only two solenoids are illustrated). Parallel with and spaced from the sheet 43 is a further sheet 47 of electrically insulating material, the sheet 47 being formed with an array of apertures corresponding to the array of recesses in the sheet 43, the apertures receiving the opposite ends of the solenoids 45.A printed circuit board 49 is positioned on that side of the sheet 47 remote from the solenoids 45 and carries components (not shown) for controlling operation of the solenoids in response to signals from a computer or the like, the printed circuit board being electrically connected to the solenoids in like manner to that described in relation to Figures 1 and 2.
One of the solenoids 45 is illustrated in more detail in
Figure 4. The solenoid 45 comprises a magnetically latched solenoid having a centre tapped coil 51 wound on a suitable support body 53, for example of nylon, the centre tapped coil giving rise to two independently operable coils arranged side-by-side. Slidably mounted in the support body 53 is an armature 55 of a non-magnetised ferromagnetic material, for example a ferrous material. As with the embodiment of Figures 1 and 2, the armature carries an operating rod 25 which passes through an aperture in the sheet 43.Mounted within that end of the support body remote from the sheet 43 is a cylindrical permanent magnet 57, for example an encapsulated rare earth magnet, and mounted within that end of the support body 53 adjacent to the sheet 43 is an annular permanent magnet 59, for example an encapsulated rare earth magnet, the operating rod 25 passing through the aperture in the annular magnet. The armature 55 thus provides two operating positions within the support body, with the armature being attracted to, and magnetically latched by, either one of the two magnets 57 and 59. The coils are employed separately to overcome the magnetic attraction to one of the magnets and to urge the armature to a position in which it is attracted to, and magnetically latched by, the other of the permanent magnets. In other respects, construction and operation of the embodiment of Figures 3 and 4 is substantially identical to the embodiment of Figures 1 and 2.
Claims (18)
1. A heald control assembly comprising: a plurality of heald control rods, each of which rods is reciprocally movable in the axial direction thereof between first and second positions, one end of each heald control rod being slidably mounted in support means; a plurality of operating rods, there being a separate operating rod associated with each heald control rod with each said operating rod having an axial direction transverse to the axial direction of the associated heald control rod, each of which operating rods is reciprocably movable in the axial direction thereof between first and second positions, one end of each operating rod being slidably mounted in support means; and means for independently moving each of said operating rods between the first and second positions thereof, the arrangement being such that, in one of the first and second positions of each operating rod, the operating rod is engageable with the associated heald control rod so as to limit movement of the heald control rod relative to the support means and, in the other of the first and second positions of each operating rod, the operating rod is not engageable with the associated heald control rod so as to permit movement of the heald control rod relative to the support means.
2. A heald control assembly as claimed in claim 1, wherein the support means for the heald control rods is integral with the support means for the operating rods.
3. A heald control assembly as claimed in claim 1 or 2, wherein the heald control rods and the operating rods are slidably mounted in apertures provided in the support means.
4. A heald control assembly as claimed in claim 3, wherein the aperture for each heald control rod is arranged substantially perpendicular to the aperture for the associated operating rod.
5. A heald control assembly as claimed in any preceding claim, wherein the support means is generally V-shaped.
6. A heald control assembly as claimed in any preceding claim, wherein each operating rod is engageable with the one end of the associated heald control rod.
7. A heald control assembly as claimed in any preceding claim, wherein the means for independently moving each of the operating rods includes means for latching the operating means in at least one of the first and second positions.
8. A heald control assembly as claimed in claim 7, wherein the means for independently moving each of the operating rods includes means for latching the operating means in each of the first and second positions.
9. A heald control assembly as claimed in claim 7 or 8, wherein the means for independently moving each of the operating rods comprises a latchable solenoid associated with each operating rod.
10. A heald control assembly as claimed in claim 9, wherein the operating rod is, or is mounted on, an armature of the solenoid.
11. A heald control assembly as claimed in claim 9 or 10, wherein the solenoids are arranged in an array in a sheet of electrically insulating material.
12. A heald control assembly as claimed in claim 9 or 10, wherein the solenoids are arranged in an array between two sheets of magnetic or non-magnetic material.
13. A heald control assembly as claimed in any one of claims 9 to 12, wherein the solenoids each comprise a magnetically latchable solenoid.
14. A heald control assembly as claimed in claim 13 when dependent on claim 11, wherein, for latching a magnetically latchable solenoid, the opposing faces of the sheet of electrically insulating material are provided with a sheet of non-magnetised ferromagnetic material, such as mild steel, the armature comprising a magnetised material.
15. A heald control assembly as claimed in claim 13, wherein, for latching a magnetically latchable solenoid, the armature comprises a non-magnetised ferromagnetic material with a magnet, such as a permanent magnet, arranged in the region of each end of the solenoid.
16. A heald control assembly as claimed in claim 11 or 12 or in any claim dependent thereon, wherein control means for the array of solenoids is provided on a circuit board mounted on that side of the array remote from the support means for the heald control rods.
17. A heald control assembly as claimed in claim 16 when dependent on claim 12, wherein a layer of electrically insulating material is positioned between the sheet of magnetic or non-magnetic material and the circuit board.
18. A heald control assembly substantially as hereinbefore described and as shown in Figures 1 and 2 or Figures 3 and 4 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9519616A GB2305444A (en) | 1995-09-26 | 1995-09-26 | Heald control mechanism for a loom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9519616A GB2305444A (en) | 1995-09-26 | 1995-09-26 | Heald control mechanism for a loom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9519616D0 GB9519616D0 (en) | 1995-11-29 |
| GB2305444A true GB2305444A (en) | 1997-04-09 |
Family
ID=10781294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9519616A Withdrawn GB2305444A (en) | 1995-09-26 | 1995-09-26 | Heald control mechanism for a loom |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2305444A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2830024A1 (en) * | 2001-09-26 | 2003-03-28 | Innotextile | Loom needle displacement control unit has needles sliding in module cavities and controlled electromagnetically by locking rods |
| CN102888692A (en) * | 2012-10-16 | 2013-01-23 | 杭州微推信息科技有限公司 | Flower pillow electromagnetic valve, flower pillow drive board and computer flower pillow thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3904855A (en) * | 1973-07-16 | 1975-09-09 | Grosse Webereimaschinen Gmbh | Read-in system for the control of card-punching machine, jacquard machines and the like |
| GB2106549A (en) * | 1981-09-22 | 1983-04-13 | Wilcom Pty Ltd | A jacquard type system |
| JPS59163440A (en) * | 1983-03-07 | 1984-09-14 | 武村 俊弘 | Traverse needle moving apparatus |
| EP0304985A1 (en) * | 1987-08-26 | 1989-03-01 | N.V. Florin | Device for making a shed in weaving machines |
| EP0382998A2 (en) * | 1989-02-14 | 1990-08-22 | Kabushiki Kaisha Takemura Seisakusho | Push control device for weaving needles in a jacquard machine |
| WO1993001337A1 (en) * | 1991-07-05 | 1993-01-21 | Bonas Machine Company Limited | Heald control system |
-
1995
- 1995-09-26 GB GB9519616A patent/GB2305444A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3904855A (en) * | 1973-07-16 | 1975-09-09 | Grosse Webereimaschinen Gmbh | Read-in system for the control of card-punching machine, jacquard machines and the like |
| GB2106549A (en) * | 1981-09-22 | 1983-04-13 | Wilcom Pty Ltd | A jacquard type system |
| JPS59163440A (en) * | 1983-03-07 | 1984-09-14 | 武村 俊弘 | Traverse needle moving apparatus |
| EP0304985A1 (en) * | 1987-08-26 | 1989-03-01 | N.V. Florin | Device for making a shed in weaving machines |
| EP0382998A2 (en) * | 1989-02-14 | 1990-08-22 | Kabushiki Kaisha Takemura Seisakusho | Push control device for weaving needles in a jacquard machine |
| WO1993001337A1 (en) * | 1991-07-05 | 1993-01-21 | Bonas Machine Company Limited | Heald control system |
Non-Patent Citations (1)
| Title |
|---|
| WPI Abstract Accession No. 84-266806/43 & JP 59 163 440 A * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2830024A1 (en) * | 2001-09-26 | 2003-03-28 | Innotextile | Loom needle displacement control unit has needles sliding in module cavities and controlled electromagnetically by locking rods |
| CN102888692A (en) * | 2012-10-16 | 2013-01-23 | 杭州微推信息科技有限公司 | Flower pillow electromagnetic valve, flower pillow drive board and computer flower pillow thereof |
| CN102888692B (en) * | 2012-10-16 | 2013-11-27 | 杭州微推信息科技有限公司 | Flower pillow electromagnetic valve, flower pillow drive board and computer flower pillow thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9519616D0 (en) | 1995-11-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |