EP0394522A1 - Fabric feeding apparatus for sewing machine - Google Patents
Fabric feeding apparatus for sewing machine Download PDFInfo
- Publication number
- EP0394522A1 EP0394522A1 EP89107587A EP89107587A EP0394522A1 EP 0394522 A1 EP0394522 A1 EP 0394522A1 EP 89107587 A EP89107587 A EP 89107587A EP 89107587 A EP89107587 A EP 89107587A EP 0394522 A1 EP0394522 A1 EP 0394522A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fabric
- loop
- feeding apparatus
- members
- elements
- 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
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Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B11/00—Machines for sewing quilts or mattresses
Abstract
Description
- This invention relates to an apparatus for feeding a sewing machine with a textile fabric, more specifically this invention relates to a fabric feeding apparatus which is suitable for clothes, or bedclothes such as thick bed quilts or futon comforters, when they are sewn by a sewing machine.
- Conventionally, a futon comforter is made of a front cloth, cotton wadding, and a back cloth. They are made into a unitary futon comforter by a sewing machine. The sewing machine also embroiders and quilts the futon comforter. When the pieces of the futon comforter are sewn by a sewing machine, it is necessary to bring each piece into the sewing position of the sewing machine one by one. In the sewing process, the futon comforter must be outwardly tensed. The sewing machine has a pair of units which are constituted by a plurality of clasps for the apparatus to tension a piece of the futon comforter. These units are disposed on each side of the sewing position, so as to tense the futon comforter. The clasps are like a paper clasp or clothespin.
- It is necessary to bring each piece of the futon comforter into the sewing position one by one, and to let the clasps clip hems of the futon comforter. When the sewing process is finished, it is necessary to release the clasps and to bring out the futon comforter. Hence, there is the problem that much time is spent for preparing and unfastening the futon comforter. There has not been provided a fabric feeding apparatus for sewing machines which is suitable for continuous feeding and continuous sewing.
- The clasps cannot permanently clip the futon comforter. The futon comforter increasingly slackens because the futon comforter draws against the clasps by its own weight. The slack interferes with the sewing process. The width of the futon comforter gradually shrinks during the sewing process. Frequently, the futon comforter falls from the clasps. For preventing comparably heavy futon comforters from falling, many clasps are required. However, the number of clasps is limited because of the width of the claw ends of the clasps.
- Because the hems held by the clasps are damaged by the clasp's claw ends, the hems must be cut off and wasted. For a firm grip by the clasps, the clasps must clip large hems of the futon comforter. Therefore, when clasps are utilized, much cloth is wasted.
- Accordingly, it is an object of the present invention to provide a fabric feeding apparatus for sewing machines, which can continuously feed the fabric into the sewing machine, thereby shortening the time for preparing and unfastening the fabric, such as a futon comforter.
- It is another object of the present invention to provide a fabric feeding apparatus for sewing machines which can steadily and permanently tense the fabric.
- A further object of the present invention is to provide a fabric feeding apparatus for sewing machines, which can reduce wasted cloth.
- A fabric feeding apparatus for sewing machines, according to the present invention is of a type for feeding a sewing machine with a textile fabric having opposite side hems. The sewing machine has a needle assembly and a bobbin assembly which are vertically aligned with each other to sew a textile fabric placed at a position between the needle and bobbin assemblies. The feeding apparatus is designed to set and withdraw the fabric into and from the position. The feeding apparatus includes two sets of rotary wheels that can be disposed respectively at the opposite sides of the sewing machine; a pair of loop members wrapped respectively around the two sets of wheels so that elements of each of the loop members can move around the respective sets of wheels with at least one section of their path being horizontal, and spaced from and parallel to the horizontal section of the path of the other loop member's elements; motor drivingly connected to one of each set of wheels, for driving the elements of the loop member synchronously with those of the other so that, within the horizontal sections of the paths, the loop member's elements are moved in the same direction; and a pair of holding mechanisms, mounted respectively on the loop members, for holding the opposite side hems of the fabric to hold the fabric between the pair of holding mechanisms at the respective horizontal sections of the loop paths, each of the holding mechanisms including a plurality of spike members disposed around the corresponding loop member, the spike members being pointed upward when the spike members are in the corresponding horizontal section, so as to pierce the corresponding side hem of the fabric horizontally disposed.
- The fabric feeding apparatus for sewing machines in accordance with the present invention can provide continuous feeding of the fabric into the sewing machine so that time for preparing and unfastening the fabric for the sewing machine is reduced. The apparatus can provide firm and constant holding force to the fabric to be sewn because it uses spike means as holders. If more holding force is necessary, the number of spike means and the number of spike means per length can be increased. Thereby the holding force and holding force per length can be increased. Spike means need less hems of the fabric in order to hold the fabric as compared with conventional clasps like clothespins. Wasted cloth can be reduced. The apparatus can further provide lateral tension to the fabric because it uses the adjusting means. Even if the fabric increasingly shrinks, the apparatus can constantly provide enough lateral tension.
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- Fig. 1 is a schematic side sectional view showing a sewing machine including a fabric feeding apparatus for sewing machines according to a first embodiment of the present invention.
- Fig. 2 is a schematic plan view showing a sewing machine including the fabric feeding apparatus shown in Fig. 1 when a futon comforter isplaced thereon.
- Fig. 3 is a schematic plan view of the fabric feeding apparatus shown in Fig. 2 without the futon comforter.
- Fig. 4 is a side view showing selected portion of a chain and sprocket wheel used in a fabric feeding apparatus shown in Figs. 1, 2, and 3.
- Fig. 5 is an enlarged sectional view showing near the chain of a fabric feeding apparatus along the V-V line in Fig. 2.
- Fig. 6 is a side view showing selected portion of a tension system of a fabric feeding apparatus along the V-V line in Fig. 2.
- Fig. 7 is an enlarged sectional view of Fig. 6.
- Fig. 8 is a sectional view showing the chain of the fabric feeding apparatus according to a second embodiment of the present invention.
- Fig. 9 is a schematic plan view showing a fabric feeding apparatus for a sewing machine according to a third embodiment of the present invention.
- Fig. 10 shows an enlarged detail of a chain and sprocket wheel used in the fabric feeding apparatus shown in Fig. 9.
- Fig. 11 is a schematic side view showing a manufacturing shop for futon comforters, which is suitable for the fabric feeding apparatus for sewing machines of the present invention.
- Fig. 1 is a schematic side sectional view showing a sewing machine including a fabric feeding apparatus for sewing machines according to a first embodiment of the present invention. Fig. 2 is a schematic plan view showing a sewing machine including the fabric feeding apparatus shown in Fig. 1 when a futon comforter is placed thereon. In the attached drawings, arrows indicate the feeding direction of the fabric. First, a sewing machine will be described. As shown in Figs. 1 and 2, the sewing machine has a pair of
beds 2 mounted on the floor, which are parallel to each other. A pair offirst arms 4 which are parallel to each other and at the same level, slidablybridge beds 2 and are supported onbeds 2 via slidingshoes 6. Each of theside walls 8 stand onfirst arms 4 at the location abovebeds 2.Side walls 8 are at same level and are parallel to each other. A pair ofsecond arms 10 which are parallel to each other and at same level, bridge theside walls 8 and are supported onside walls 8. There is a large vertical interval between first andsecond arms first arms 4 via slidingshoes 14. Bobbin (lower)assembly 16 of a sewing mechanism which includes a hook, a bobbin and so on, is mounted on third arm 12.Fourth arm 18 is slidably supported belowsecond arms 10 via slidingshoes 20. Needle assembly (upper assembly) 22 of the sewing mechanism, which includes a needle, a thread tension guide, a thread feeder, and so on, is suspended byfourth arm 18. Shuttle andneedle assemblies beds 2 becausefirst arms 4slidably bridge beds 2. Bobbin andneedle assemblies beds 2 because third arm 12 andfourth arm 18 slidably bridgefirst arms 4 andsecond arms 10, respectively. Bobbin andneedle assemblies - Next, a fabric feeding apparatus according to a first embodiment of the present invention will be described hereinafter. The fabric feeding apparatus is designed to set and withdraw the fabric into and from the position. As shown in Fig. 3, a supporting
rectangular frame 30 which surroundsbeds 2 of the sewing machine is mounted on the floor. A pair ofside frame members 32 offrame 30 are disposed so as to be parallel tobeds 2 and a pair of front andback frame members 33 connectframe members 32, thereby constitutingrectangular frame 30. Eachside frame member 32 has a pair ofcolumns 35 at each end, including a rollingbearing 38. A pair ofshafts side frame members 32 via rollingbearings 38.Shafts bearings 40, respectively. Each ofshafts spline 42 near one end of the shaft.Pulley 44 is mounted onshaft 36. A motor (not shown) rotatesshafts 36 via a reducing gear box (not shown) andpulley 44.Drums shafts Splines 42 are inserted into similarsized drums sprocket wheels shafts Splines 42 are inserted into similarsized sprocket wheels sprocket wheels transmission chains 62 are tensionally wrapped aroundsprocket wheels pulley 44,chains 62 move around those wheels and move in same direction with each other. Each ofchains 62 is disposed in a vertical plane. - Each
chain 62 is constituted in such a manner as shown in Figs. 4 and 5.Chain 62 includesordinal roller chain 64.Roller chain 64 includes a plurality of pairs of alternativepin link plates 66 androller link plates 68 androllers 70 which connectsplates Rollers 70 includespins 72 and bushes 74.Chain 62 further includes a plurality of pairs of supportingplates 76. Supportingplates 76 are attached toroller link plates 68. Each pair of supportingside plates 76support ceiling plate 78.Ceiling plate 78 includesspike 80 on its outside surface. The radial movement ofchain 62 against sprocket wheel 54 (56, 58, or 60) is not interfered with because supportingside plates 76 are attached toroller link plates 68. - Elongated futon comforter 82 (shown in Figs. 1 and 2) is placed on
drums futon comforter 82 are pierced by pairs ofspikes 80. The fabric feeding apparatus further includes a tension system forfuton comforter 82 as shown in Fig. 6. A motor (not shown) is equipped onside frame member 32.Motor shaft 84 of the motor connects tobevel gear 86.Guide rail 88 which is parallel to spline 42 ofshaft 36 is mounted onback frame member 33.Wheel mover 90 which is put onguide rail 88 can slide alongguide rail 88, horizontally.Wheel mover 90 has a slidingplate 92 which slides onguide rail 88, and a pair oflateral plates 94 which stands on slidingplate 92 and extends to lateral surfaces ofsprocket wheel 60 anddrum 52.Lateral plates 94 which faces each other are spaced apart at an interval which is slightly wider thansprocket wheel 60plus drum 52. A pair of standing plates 96 (one is shown and another is not shown) including a rolling bearing are mounted on both ends ofguide rail 88.Screw shaft 98bridges standing plates 96 and engages with the rolling bearings. One of thelateral plates 94 hasball nut 100 which engages withscrew shaft 98, so thatball nut 100 and screwshaft 98 constitute a ball screw mechanism. One end ofscrew shaft 98 extends to outward from standingplate 96 and then is affixed tobevel gear 102. Bevel gears 86 and 102 are engaged with each other. Therefore, by rotating the motor,shaft 84 spins, screwshaft 98 spins,wheel mover 90 slides alongguide rail 88, and drum 52 andsprocket wheel 60 slide alongspline 42. While the above tension system for a futon comforter can movedrum 52 Andsprocket wheel 60, the same tension system which can movedrum 50 and sprocket wheel 58 (see Fig. 3) is installed. Accordingly, the locations ofdrum 52 andsprocket wheel 60; and drum 50 andsprocket wheel 58 can be suitably adjusted to stretch or slacken the futon comforter, thereby givingfuton comforter 82 an adequate lateral tension force. - As shown in Fig. 3, along
chain 62 which is wrapped aroundstationary sprocket wheels elongated chain supporter 110 is mounted on the floor.Chain supporter 110 includes receivinggroove 112 forchain 62. The upper tensed portion ofchain 62 is received by receivinggroove 112, so as to be horizontal, and slides in receivinggroove 112.Elongated chain supporter 114 is secured tosplines 42 alongchain 62 which is wrapped aroundslidable sprocket wheels Chain supporter 114 also includes receivinggrooves 112 forchain 62. Whenfuton comforter 82 is fed,chain supporters futon comforter 82 and retain the upper tensed portion ofchains 62 in a horizontal position. - The relationship between
chain supporter 114 and other elements are shown more specifically in Figs 5 and 7. As shown in Fig. 7,spline 42 engages withspline bush 120.Spline bush 120 is affixed toboss 122 ofsprocket wheel 60 bybolts 124. Therefore, withrotating spline 42,sprocket wheel 60 can rotate.Spline 122 is inserted intohole 126 of pipe-shapedrolling shoe 128 which hasflange 130.Hole 126 is of larger diameter than the major diameter ofspline 122, and thereby does not receiving rotating force fromspline 122 directly.Rolling shoe 128 andboss 122 ofsprocket wheel 60 are fixed bybolts 132.Needle bearings 134 enclose the peripheral surface of rollingshoe 128, and are held byflange 130 of rollingshoe 128 andboss 122 ofsprocket wheel 60.Chain supporter 114 hasboss 135 andlateral wall 137 which is perpendicularly affixed toboss 135.Boss 135 is mounted onneedle bearings 132. Therefore, rotating force ofspline 42 is transmitted not tochain supporter 114 but tosprocket wheel 60 and drum 52 (not shown in Fig. 7). Furthermore, with axial movement ofsprocket wheel 60,chain supporter 114 can be moved together. -
Chain supporter 114 is secured to spline 42 ofshaft 36 and tosprocket wheel 60 in the above fashion.Chain supporter 114 has anotherboss 135 also secured to spline 42 ofshaft 34 and to sprocket wheel 58 (see Fig. 3) in a similar fashion. Therefore,chain supporter 114 can be moved alongshafts groove 112 ofchain supporter 114 can always be moved to the location wheregroove 112 can receivechain 62 as shown in Fig. 5. More precisely groove 112 receiveschain 62 andchain supporter 114 supportsceiling plate 78 ofchain 62. The weight offuton comforter 82 is also supported bychain supporter 114. - As shown in Figs. 1 and 2, feeding
rollers shaft 34 are installed for providing appropriate piercing by spikes 80. This means that holes of minimum size are caused byspikes 80 or other more extensive damage. Feedingroller 142 is installed generally just aboveshaft 34. Feedingroller 140 is installed above and to the left of feedingroller 142.Futon comforter 82 is fed from the left side to the right side in Figs. 1 and 2. Feedingrollers shaft 36 are installed for appropriate removal offuton comforter 82 fromspike 80, thereby preventingfuton comforter 82 from receiving unexpected extensive damage. Feedingroller 144 is installed generally just aboveshaft 36. Feedingroller 146 is installed above and to the right of feedingroller 144.Futon comforter 82 passes overroller 140 and underroller 142. When spike 80 stands vertically, spike 80 begins to piercefuton comforter 82. Therefore, the appropriate piercing is provided. After feeding onchains 62,futon comforter 82 passes underroller 144 and overroller 146. Beforespike 80 inclines, spike 80releases futon comforter 82. Therefore, the appropriate removal is provided. - Elongated safety covers 150, which are extending from
sprocket wheel 54 tosprocket wheel 56, or extending fromsprocket wheel 58 tosprocket wheel 60, are placed on the upper tensed portions ofchains 62 for preventing operators from injury by spikes 80. One of the safety covers 150 is specifically shown in Fig. 5. Thesafety cover 150 includesperpendicular groove 152 opening below forspikes 80 passing therethrough. Perpendicular pairs ofholes 154 are aligned insafety cover 150. Each ofholes 154 includes a lowersmall diameter portion 156 and an upperlarge diameter portion 158.Springs 160 are inserted into thelarge diameter portions 158 and are supported by the edges ofsmall diameter portions 156, respectively. Core pins 162 are inserted intosprings 160, one by one. L-shaped pressers made ofthin metal plates 164 are attached tochain supporters 114. Core pins 162 are affixed topressers 164.Springs 160 are pressed between the edges andpressers 164. One of hems of thefuton comforter 82 and theceiling plates 78 oftransmission chain 62 are sandwiched betweensafety cover 150 and chain supporter 114 (or 110). - Therefore, both safety covers 150 function as fasteners for
futon comforter 82, which cooperate withspikes 80. Because safety covers 150 function as fasteners, lateral tension force tospikes 80 is moderated, and spikes 80 andsprocket wheels chains 62 are prevented from falling off from the sprocket wheels. For smooth feeding offuton comforter 82, safety covers 150 are made of low friction material, such as poly-tetra-fluoro-ethylene. - For further smooth feeding of
futon comforter 82 under safety covers 150, as shown in Figs. 1 and 2, a pair ofweight rollers 170 are installed nearsprocket wheels weight roller 170 includes a pair ofwheels 172 and a shaft 174.Wheels 172 of eachweight roller 170 are spaced apart to spread overpins 80 so as to prevent contact with pins 80. When feedingfuton comforter 82,wheels 172 rotate and press downfuton comforter 82. - As mentioned above, the fabric feeding apparatus for sewing machines in accordance with the first embodiment of the present invention can provide continuous feeding of the fabric into the sewing machine, so that time for preparing and unfastening the fabric for the sewing machine is reduced. The apparatus can provide firm and constant holding force to the fabric to be sewn because it uses spikes 80 as holders. If more holding force is necessary,
chains 62 may be substituted by similarly formed chains which have smallerpin link plates 66,roller link plates 68,rollers 70, supportingside plates 76, andceiling plates 78. Therefore, the number ofspikes 80 and number ofspikes 80 per length can be increased, thereby the holding force and holding force per length can be increased. (In the conventional way, the number of clasps is limited.)Spikes 80 need less hems of the fabric in order to hold the fabric as compared with conventional clasps like clothespins. Wasted clothe can thereby be reduced. The apparatus further provides lateral tension to the fabric because it uses the sprocket mechanism. Even if the fabric shrinks, the apparatus can constantly provide enough lateral tension. - A second embodiment of the present invention will be described hereinafter. As shown in Fig. 8,
chain 62 haswide ceiling plates 180 instead of ceiling plates 78 (shown in Fig. 5) of the first embodiment.Ceiling plates 180 extend inward toward the feeding apparatus.Spikes 182 are affixed near the inward end ofceiling plates 180, respectively, in such a manner that spike 182 perpendicularly stands onceiling plates 180.Horizontal plates 184 are affixed tochain supporter 114. A ceiling ofpressers 184 extend just above the inward ends ofceiling plates 180.Safety cover 150 is supported bypressers 184 in the same, manner as in the first embodiment, in whichsafety cover 150 is supported bypressers 164.Safety cover 150 prevents the operator from injury and acts as a fastener forfuton comforter 82 similar to the first embodiment.Ceiling plates 180 and the ceiling ofpresser 184 extend inward.Safety cover 150 acts at a location that is more inward than the first embodiment of Fig. 5. Thus,bobbin assembly 16 of the sewing machine, which moves underfuton comforter 82, can move relatively outward, avoiding contact withchain supporter 114 orchain 62. The area that the sewing machine can sew is broader than the first embodiment. - While the sprocket wheels are horizontally disposed in these embodiments, the sprocket wheels can be vertically disposed as a third embodiment as shown in Fig. 9. Fig. 9 is a schematic plan view of the third embodiment.
Numeral Sprocket wheels chains 210 are tensionally wrapped aroundsprocket wheels chains 210 are disposed in a horizontal plane.Chains 210 are of generally same shape aschains 62 of the first embodiment. However, referring to Fig. 10, the spikes are not affixed toceiling plates 78 directly.Futon receiving plates 212 are attached toceiling plates 78, perpendicularly, so that each upper surface offuton receiving plates 212 are at the same level. Eachfuton receiving plates 212 has aspike 214 at its upper surface. Therefore, the fabric feeding apparatus for sewing machine of the third embodiment can feed fabrics in a condition such that the fabric is pierced byspikes 214. Needless to say, other elements described concerning the first embodiment may be installed in the apparatus, so as to have the same qualities as the first embodiment. - The above mentioned fabric feeding apparatuses are advantageous, especially in the case when the apparatuses are utilized in a futon comforter manufacturing shop as shown in Fig. 11. In the figure, numeral 220, 222, and 224 designate front cloth, internal cotton, and back cloth, respectively, which are components of
futon comforter 82. Supplyingrollers supply front cloth 220,internal cotton 222, and backcloth 224, respectively.Front cloth 220,internal cotton 222, and backcloth 224 are then collected and laminated on previously describedfeeding roller 140 viarollers rollers front cloth 220,internal cotton 222, and backcloth 224 are sewn into aunitary futon comforter 82. After passing over feedingroller 146,futon comforter 82 passes aroundrollers roller 244 is suspended so as to be movable up and down, therebyroller 242 acts as a cushion for feeding.Futon comforter 82 passes through betweenrollers
Claims (9)
two sets of rotary wheels that can be disposed respectively at the opposite sides of the sewing machine;
a pair of loop members wrapped respectively around the two sets of wheels so that elements of each of the loop members can move around the respective sets of wheels with at least one section of their path being horizontal, and spaced from and parallel to the horizontal section of the path of the other loop member's elements;
drive means, drivingly connected to one of each set of wheels, for driving the elements of the loop member synchronously with those of the other so that, within the horizontal sections of the paths, the loop member's elements are moved in the same direction; and
a pair of holding means, mounted respectively on the loop members, for holding the opposite side hems of the fabric to hold the fabric between the pair of holding means at the respective horizontal sections of the loop paths, each of the holding means including a plurality of spike members disposed around the corresponding loop member, the spike members being pointed upward when the spike members are in the corresponding horizontal section, so as to pierce the corresponding side hem of the fabric horizontally disposed.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1989623960 DE68923960T2 (en) | 1989-04-26 | 1989-04-26 | Fabric feeder for a sewing machine. |
EP19890107587 EP0394522B1 (en) | 1989-04-26 | 1989-04-26 | Fabric feeding apparatus for sewing machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19890107587 EP0394522B1 (en) | 1989-04-26 | 1989-04-26 | Fabric feeding apparatus for sewing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0394522A1 true EP0394522A1 (en) | 1990-10-31 |
EP0394522B1 EP0394522B1 (en) | 1995-08-23 |
Family
ID=8201294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890107587 Expired - Lifetime EP0394522B1 (en) | 1989-04-26 | 1989-04-26 | Fabric feeding apparatus for sewing machine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0394522B1 (en) |
DE (1) | DE68923960T2 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1550051A (en) * | 1964-10-09 | 1968-12-20 | ||
DE1485386A1 (en) * | 1965-06-15 | 1969-06-12 | Kurt Schlegel | Machine for the production of stretchable quilted goods |
US3500777A (en) * | 1968-03-07 | 1970-03-17 | Mathewson Corp | Quilting apparatus |
-
1989
- 1989-04-26 EP EP19890107587 patent/EP0394522B1/en not_active Expired - Lifetime
- 1989-04-26 DE DE1989623960 patent/DE68923960T2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1550051A (en) * | 1964-10-09 | 1968-12-20 | ||
DE1485386A1 (en) * | 1965-06-15 | 1969-06-12 | Kurt Schlegel | Machine for the production of stretchable quilted goods |
US3500777A (en) * | 1968-03-07 | 1970-03-17 | Mathewson Corp | Quilting apparatus |
Also Published As
Publication number | Publication date |
---|---|
DE68923960T2 (en) | 1996-03-14 |
DE68923960D1 (en) | 1995-09-28 |
EP0394522B1 (en) | 1995-08-23 |
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