TREA

Split reed including a weaving reed and an auxiliary reed having a non-planar guide path

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Information

  • Patent Grant
  • 6394146
  • Patent Number
    6,394,146
  • Date Filed
    Wednesday, May 16, 2001
    23 years ago
  • Date Issued
    Tuesday, May 28, 2002
    22 years ago
Information
Abstract
A split reed has a weaving reed formed by successively arranging dents respectively provided with recesses forming a weft yarn guide path having a back surface, and an auxiliary reed respectively provided with recesses forming a weft yarn guide path having a back surface. The weaving reed and the auxiliary reed are attached to a slay or the respective dents of the weaving reed and the auxiliary reed are formed so that the back surface of the weft yarn guide path of the auxiliary reed is included in a plane behind a plane including the back surface of the weaving reed with respect to the cloth fell of a fabric on the loom when the weaving reed and the auxiliary reed are attached to the slay.
Description




BACKGROUND OF THE INVENTION




1. Field of the Invention




The present invention relates to improvements in a split reed for a loom




2. Description of the Related Art




Referring to

FIG. 1

, a general split reed


1


includes a weaving reed


2


for weaving and an auxiliary reed


3


. The weaving reed


2


and the auxiliary reed


3


are aligned in parallel to the cloth fell


31


of a woven fabric


30


and are spaced by a gap


22


. When a weft yarn


16


picked by a main picking nozzle


28


passes the gap


22


, the weft yarn


16


is subject to the influences of an air jet jetted through an auxiliary picking nozzle


29


and the forward movement of the split reed


1


. Consequently, the picked weft yarn


16


deviates from a picking path in a direction away from the cloth fell


31


, i.e., a direction toward a let-off motion, not shown, for feeding warp yarns


17


.




A technique proposed in JP-A No. 9-268454 to solve such a problem forms a weft yarn guide path in each of the dents of a split reed for an air-jet loom. The shape of the dent is changed at the boundary of one section of the weft yarn guide path and another section of the same following the former is changed so that an inlet end part of the weft yarn guide path on a lower side with respect to a picking direction is flared toward an upper side with respect to the picking direction.




The manufacture of the prior art split reed including the dents, having a shape that changes stepwise needs complicated processes and hence is very expensive. More over, it is difficult to form an accurately smoothly tapered picking path by arranging the dents having a shape that changes stepwise and the weft yarn will not be properly inserted unless the picking path is formed in a smoothly tapered shape.




SUMMARY OF THE INVENTION




Accordingly, it is an object of the present invention to provide a split reed including a weaving reed for beating up a picked weft yarn and an auxiliary reed disposed in a region in which any warp yarns are not extended on an arriving side of a loom opposite a picking side of the loom, and capable of guiding a picked weft yarn so that the picked weft yarn is able to travel stably toward the arriving side.




With the foregoing object in mind, a split reed according to one aspect of the present invention includes a weaving reed and an auxiliary reed; wherein the weaving reed and the auxiliary reed are disposed so that the back surface of a weft yarn guide path formed in the auxiliary reed is included in a plane behind a plane including the back surface of a weft yarn guide path formed in the weaving reed, i.e., on the side of a let-off motion included in the loom with respect to the back surface of the weft yarn guide path of the weaving reed, and the respective weft yarn guide paths of the weaving reed and the auxiliary reed have a substantially rectangular cross section and are defined by an upper surface, a lower surface and a back surface.




According to a first aspect of the present invention, a split reed for a loom comprises: a weaving reed disposed in a region where warp yarns are extended and defining a weft yarn guide path; and an auxiliary reed separated from the weaving reed, disposed in a region on an arriving side of the loom in which any warp yarns are not extended and forming a weft yarn guide path; wherein a plane including the back surface of the weft yarn guide path of the auxiliary reed is behind a plane including the back surface of the weft yarn guide path of the weaving reed with respect to the cloth fell of a woven fabric woven on the loom.




In the split reed, it is preferable that the auxiliary reed is formed by arranging dents of the same shape as that of those forming the weaving reed, and the auxiliary reed is disposed at a position on a slay behind a position where the weaving reed is disposed on the slay with respect to the cloth fell.




In the split reed, it is preferable that the auxiliary reed is formed by arranging dents of the same shape as that of those forming the weaving reed, and the lower end of the auxiliary reed is attached to a reed holding member so that the auxiliary reed is positioned behind the weaving reed with respect to the cloth fell.




In the split reed, it is preferable that the auxiliary reed is formed by arranging dents different from those forming the weaving reed, and the back surface of the weft yarn guide path of the auxiliary reed is included in a plane behind a plane including the back surface of the weft yarn guide path of the weaving reed with respect to the cloth fell.




In the split reed, it is preferable that the auxiliary reed is formed by arranging dents different from those forming the weaving reed, the back surface of the weft yarn guide path of the auxiliary reed is included in a plane behind a plane including the back surface of the weft yarn guide path of the weaving reed with respect to the cloth fell, and the auxiliary reed is disposed at a position on a slay behind a position where the weaving reed is disposed on the slay with respect to the cloth fell.




In the split reed, it is preferable that the auxiliary reed is formed by arranging dents different from those forming the weaving reed, the back surface of the weft yarn guide path of the auxiliary reed is included in a plane behind a plane including the back surface of the weft yarn guide path of the weaving reed with respect to the cloth fell, and the lower end of the auxiliary reed is attached to a reed holding member so that the auxiliary reed is positioned behind the weaving reed with respect to the cloth fell.











BRIEF DESCRIPTION OF THE DRAWINGS




The above and other objects, features and advantages of the present invention will become more apparent from the following description taken in connection with the accompanying drawings, in which:





FIG. 1

is a schematic view of a prior art split reed;





FIG. 2

is a schematic view of a split reed in a preferred embodiment according to the present invention including a weaving reed and an auxiliary reed;





FIG. 3

is a side elevation of assistance in explaining the positional relation between the weaving reed and the auxiliary reed of the split reed shown in

FIG. 2

;





FIG. 4

is a side elevation of the split reed shown in

FIG. 2

as mounted on a slay;





FIG. 5

is a perspective view of the weaving reed and the auxiliary reed of the split reed shown in

FIG. 2

as mounted on a slay;





FIG. 6

is a view of assistance in explaining another method of disposing the weaving reed and the auxiliary reed of the split reed mounted on a slay; and





FIG. 7

is a view of assistance in explaining a third method of disposing the weaving reed and the auxiliary reed of the split reed on a slay.











DESCRIPTION OF THE PREFERRED EMBODIMENTS




Referring to

FIGS. 2 and 3

, a split reed


1


in a preferred embodiment according to the present invention for a loom includes a weaving reed


2


and an auxiliary reed


3


. The weaving reed


2


is disposed in a region where warp yarns


17


are extended and the auxiliary reed


3


is disposed in a region where any warp yarns are not extended on an arriving side opposite a picking side and is spaced from the weaving reed


2


. As shown in

FIG. 5

, a weft yarn guide path


4


is formed in the weaving reed


2


and a weft yarn guide path


5


is formed in the auxiliary reed


3


so as to be continuous with the weft yarn guide path


4


of the weaving reed


2


. The weft yarn guide paths


4


and


5


are on the level of a cloth fell


31


in a fabric


30


being woven on the loom. The weaving reed


2


is formed by fixing the upper and lower ends of a plurality of dents


6


to dent holding members


14


, respectively, and the auxiliary reed


3


is formed by fixing the upper and the lower ends of a plurality of dents


7


to dent holding members


15


, respectively. The weft yarn guide path


4


of the weaving reed


2


is a successive arrangement of substantially rectangular recesses formed in parts of the dents


6


and is defined by an upper surface


8


, a lower surface


10


and a back surface


12


. The weft yarn guide path


5


of the auxiliary reed


3


is a successive arrangement of substantially rectangular recesses formed in parts of the dents


7


and has an upper surface


9


, a lower surface


11


and a back surface


13


. The back surface


13


of the weft yarn guide path


5


of the auxiliary reed


3


is included in a plane behind a plane including the back surface


12


of the weft yarn guide path


4


of the weaving reed


2


with respect to the cloth fell


31


. A gap


22


of a proper width is formed between the weaving reed


2


and the auxiliary reed


3


to avoid the interference of the split reed


1


with a cutter


20


and a tuck-in device


21


.




Referring again to

FIGS. 2 and 3

, a weft yarn


16


is picked into a shed


18


formed by the wrap yams


17


by a main picking nozzle


28


. The picked weft yarn


16


is assisted for flying toward the arriving side through the weft yarn guide path


4


of the weaving reed


2


by a fluid jetted through a plurality of auxiliary nozzles


29


and reaches the weft yarn guide path


5


of the auxiliary reed


3


disposed below the weaving reed


2


with respect to a picking direction. When a weft feeler


19


is disposed opposite to the auxiliary reed


3


detects the picked weft yam


16


, it is decided that the weft yarn


16


has been inserted properly in the shed


18


. The properly inserted weft yarn


16


is beaten up into the cloth fell


31


of the fabric


30


by the beating-up motion of the split reed


1


(the weaving reed


2


and the auxiliary reed


3


). After the beating-up motion has been completed, the weft yarn


16


is cut at a position between the weaving reed


2


and the auxiliary reed


3


by the cutter


20


. An end part of the weft yarn


16


extending from a selvage of the fabric


30


is tucked into the shed


18


of the warp yarns


17


by the tucking-in operation of the tuck-in device


21


to form the selvage of the fabric


30


.




As mentioned above, the back surface


13


of the weft yarn guide path


5


of the auxiliary reed


3


is included in a plane behind a plane including the back surface


12


of the weft yarn guide path


4


of the weaving reed


2


with respect to the cloth fell


31


. Therefore, the leading end part of the picked weft yarn


16


is able to enter the weft yarn guide path


5


of the auxiliary reed


3


without fail even if the leading end part of the weft yarn


16


passing through the gap


22


between the weaving reed


2


and the auxiliary reed


3


is deviated in a direction away from the cloth fell


31


by the influence of an air jet jetted through the auxiliary nozzle


29


or the advancement of the split reed


1


. In this embodiment, the dents


7


of the auxiliary reed


3


have the same shape. Therefore, the weft yarn guide path


5


of the auxiliary reed


3


can be formed accurately smoothly tapered shape without difficulty.





FIGS. 4

to


7


are views of assistance in explaining a method of attaching the split reed


1


including the weaving reed


2


and the auxiliary reed


3


to a slay


23


. Referring to

FIGS. 4 and 5

, the dents


7


of the auxiliary reed


3


are the same in shape as the dents


6


of the weaving reed


2


. The position of the auxiliary reed


3


on the slay


23


is behind the position of the weaving reed


2


on the slay


23


with respect to the cloth fell


31


; that is the auxiliary reed


3


is shifted from a position corresponding to the weaving reed


2


toward a let-off motion for letting off the warp yarns


17


.




The lower dent holding member


14


holding the weaving reed


2


is placed in a groove


24


formed in the slay


23


in contact with the front side surface of the groove


24


, large wedges


26


are driven into a space between the back surface of the dent holding member


14


and the back side surface of the groove


24


, and the wedges


26


are fixed in place with bolts


27


. The lower dent holding member


15


holding the auxiliary reed


3


is placed in the groove


24


in contact with the back side surface of the groove


24


, shims


25


are inserted in a space between the front surface of the dent holding member


15


and the front side surface of the groove


24


, small wedges


26


are driven into a space between the back surface of the dent holding member


15


and the back side surface of the groove


24


and the small wedges


26


are fixed in place with bolts


27


. Thus the back surface


13


of the weft yarn guide path


5


of the auxiliary reed


3


is included in a plane spaced a distance corresponding to the thickness of the shims


25


apart behind a plane including the back surface


12


of the weft yarn guide path


4


of the weaving reed


2


.




In an arrangement shown in

FIG. 6

, the dents


7


of the auxiliary reed


3


are the same in shape as the dents


6


of the weaving reed


2


. The dent holding members


14


and


15


are the same in shape, except that the distance between the front surface of the dent holding member


14


and a groove formed in the dent holding member


14


to receive the dents


6


of the weaving reed


2


is shorter than the distance between the front surface of the dent holding member


15


and a groove formed in the dent holding member


14


to receive the dents


6


of the auxiliary reed


3


.




In an arrangement shown in

FIG. 7

, the weaving reed


2


and the auxiliary reed


3


are disposed on a slay


23


at the same position with respect to a direction perpendicular to the picking direction, and the dents


6


of the weaving reed


2


and dents


7


of the auxiliary reed


3


have different shapes, respectively. The back surface


13


of the weft yarn guide path


5


of the auxiliary reed


3


is included in a plane spaced a distance apart behind a plane including the back surface


12


of the weft yarn guide path


4


of the weaving reed


2


. If necessary, a part of each dent


7


behind the back surface


13


may be protruded backward to reinforce the dent


7


because the depth of the recess formed in each dent


7


to define the weft yarn guide path


5


is deeper than that of the recess formed in each dent


6


to define the weft yarn guide path


4


. The dents


6


and


7


shown in

FIG. 7

may be positioned by a method similar to that previously described with reference to

FIGS. 4 and 5

or may be positioned by a method similar to that previously described with reference to FIG.


6


. The auxiliary reed


3


may be attached to the slay


23


so as to incline to the cloth fell


31


as indicated by two-dot chain lines in FIG.


2


.




Since the present invention has the following effects. The back surface of the weft yarn guide path of the auxiliary reed is included in a plane behind a plane including the back surface of the weft yarn guide path of the weaving reed with respect to the cloth fell, a leading end part of the picked weft yarn is able to enter the weft yarn guide path of the auxiliary reed without fail even if the leading end part of the weft yarn passing through the gap between the weaving reed and the auxiliary reed is deviated in a direction away from the cloth fell by the influence of an air jet jetted through the auxiliary nozzle or the advancement of the split reed.




When the dents of the auxiliary reed are of the same shape, the auxiliary reed is free from a problem that it is difficult to form ‘an accurately smoothly tapered picking path’. When the weaving reed and the auxiliary reed are formed of the same dents, the weaving reed and the auxiliary reed can be efficiently manufactured at a low cost because all the dents can be efficiently formed by the same process at a low cost.




Although the invention has been described in its preferred embodiments with a certain degree of particularity, obviously many changes and variations are possible therein. It is therefore to be understood that the present invention may be practiced otherwise than as specifically described herein without departing from the scope and spirit thereof.



Claims
  • 1. A split reed for a loom, comprising:a weaving reed disposed in a region where warp yarns are extended and defining a weft yarn guide path; and an auxiliary reed separated from the weaving reed, the auxiliary reed being disposed in a region on an arriving side of the loom in which any warp yarns are not extended and forming a weft yarn guide path; wherein a plane including a back surface of the weft yarn guide path of the auxiliary reed is behind a plane including a back surface of the weft yarn guide path of the weaving reed with respect to a cloth fell of a fabric woven on the loom.
  • 2. The split reed according to claim 1, wherein the auxiliary reed is formed by arranging dents of the same shape as that of those forming the weaving reed, and the auxiliary reed is disposed at a position on a slay behind a position where the weaving reed is disposed on the slay with respect to the cloth fell.
  • 3. The split reed according to claim 1, wherein the auxiliary reed is formed by arranging dents of the same shape as that of those forming the weaving reed, and a lower end of the auxiliary reed is attached to a lower reed holding member so that the auxiliary reed is positioned behind the weaving reed with respect to the cloth fell.
  • 4. The split reed according to claim 1, wherein the auxiliary reed is formed of an arrangement of first dents,wherein the weaving reed is formed of an arrangement of second dents, and wherein the first dents are different in relation to the second dents.
  • 5. The split reed according to claim 1, wherein the auxiliary reed is formed of an arrangement of first dents,wherein the weaving reed is formed of an arrangement of second dents, wherein the first dents are different in relation to the second dents, and wherein the auxiliary reed is disposed at a position on a slay behind a position where the weaving reed is disposed on the slay with respect to the cloth fell.
  • 6. The split reed according to claim 1, wherein the auxiliary reed comprises a lower end, and is formed of an arrangement of first dents,wherein the weaving reed comprises a lower end, and is formed of an arrangement of second dents, wherein the first dents are different in relation to the second dents, and wherein lower ends of the weaving reed and the auxiliary reed are attached to reed holding members, respectively, so that the auxiliary reed is positioned behind the weaving reed on a slay with respect to the cloth fell.
Priority Claims (1)
Number Date Country Kind
2000-159779 May 2000 JP
US Referenced Citations (4)
Number Name Date Kind
4458730 Benelli Jul 1984 A
4520850 Cramer et al. Jun 1985 A
5253681 Cramer et al. Oct 1993 A
5782271 Wahhoud et al. Jul 1998 A
Foreign Referenced Citations (1)
Number Date Country
9-268454 Oct 1997 JP