JPH0711099B2 - Warp tension balancer of loom and triaxial weaving loom - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a warp tension balancer for a loom such as a circular loom or a triaxial weaving loom and a triaxial weaving loom to which the technique is applied.

2. Description of the Related Art As a conventional loom such as a circular loom or a triaxial weaving loom, as shown in Japanese Patent Publication No. 56-34664 and Japanese Patent Publication No. 59-36015, a plurality of warp yarns It is known that beams are arranged side by side in a ring shape on a support, and each warp group rotates each beam to pull out the warp by pulling each warp by winding the woven cloth.

Further, as a triaxial weaving loom, Japanese Patent Publication No. 59-34812,
As shown in Japanese Examined Patent Publication No. 60-54417 and U.S. Pat. No. 4,170,249, a frame is provided with an annular support rotatably about an axis in the vertical direction, and the support is equally divided. A plurality of beams around which many warps are wound are rotatably provided, and the frames are guided so that the length of the warp of each warp group drawn out from each beam and guided to the triaxial weaving mechanism does not change. When a compensator cam is installed and the woven cloth is wound by weaving by the triaxial weaving mechanism,
It is known that each warp yarn is pulled by the winding, and each warp yarn group rotates each beam to pull out the warp yarn.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In a loom in which each beam is rotated by the tension of the warp to draw out the warp as described above, the warp of each warp group is compensated so that its length hardly changes. Even with a compensator cam, the warp tension changes during weaving due to manufacturing errors in each part of the loom, changes in the sliding resistance of the warp, warp errors in the beam, etc. Occurs. As a result, a difference in tension also occurs between the warps in each beam, the tension of the warp on one end side of the warp group drawn from each beam increases, and the tension of the warp on the other end decreases. is there. In that case, the difference in tension between the adjacent warps between the adjacent beams becomes extremely large, and a large difference in tension occurs between the warps, which causes weaving unevenness in the woven fabric, which reduces the commercial value of the woven fabric. There was a problem.

In the triaxial weaving machine, since each warp is inclined with respect to the weft, if a difference in tension occurs between the warps, the weaving length of the warp tends to change, and the above weaving unevenness becomes remarkable. ,
The conventional technique has a second problem that is difficult to put into practical use.

In order to solve the above-mentioned first problem, the present invention provides two sets of warp groups at positions corresponding to each other between two sets of warp group trajectories drawn from adjacent beams. A corresponding pair of movable bodies is movably arranged in a direction connecting two warp groups, and a plurality of thread guides capable of hooking a plurality of warp threads at the ends of the warp groups are respectively provided on the movable bodies. A warp tension balancer for a loom, which is arranged in parallel with each other and is formed by connecting the pair of movable bodies via a tension spring.

In order to solve the above-mentioned second problem, the present invention provides a frame with an annular support rotatably around an axis in the vertical direction, and winds a large number of warp yarns at equal positions on the support. A plurality of attached beams are rotatably provided, and a compensator cam for guiding the warp of each warp group drawn out from each beam to the triaxial weaving mechanism so that its length hardly changes is provided in the frame. In a shaft weaving machine, a plurality of warp yarns at the ends of a warp yarn group drawn from two sets of beams adjacent to the support are pulled together by a tension spring to balance the tension of the warp yarns between the beam ends. It is characterized in that the warp tension balancer is arranged.

Action When weaving, a plurality of warp yarns at the end of the warp yarn group pulled out from the beam are hooked on the yarn guides of the corresponding moving bodies so that the yarn guides on the respective end sides have a longer yarn path length, and the adjacent two
A plurality of warp yarns at the ends of the set of warp yarns are attached by a tension spring. As a result, a plurality of warp yarns at the end portions of the two adjacent warp yarn groups are applied with the same tension as a whole by the tension springs, respectively. The difference in tension between the warp yarns at the ends can be reduced.
During weaving, the tension acting on the plurality of warps at the ends of the two warp groups changes, and the tension acting on the warp at the end of one warp group acts on the warp at the end of the other warp group. If one of the warp threads pulls in the moving body and the other moving body is pulled through the tension spring to increase the tension of the other warp thread, the two warp groups adjacent to each other will end up. It is possible to reduce the difference in tension by balancing the tensions acting on the plurality of warp yarns at the ends of the.

When weaving by the triaxial weaving mechanism, the warp tension balancer pulls a plurality of warp yarns at the end portions of the warp yarn groups drawn out from two adjacent beams so as to balance the tension between the warp yarns at the beam end portions. Therefore, if the tension of one warp at the end of the adjacent warp group becomes larger than the tension of the other warp, the one warp pulls the other warp through the tension spring and the tension of both warps Balance.

EXAMPLE FIG. 1 and FIG. 2 show a warp tension balancer 1 of a loom, and FIGS. 3 to 7 show a triaxial weaving loom 2 equipped with the warp tension balancer 1. First, in the triaxial weaving loom 2, 3 is a fixedly installed frame, which is constructed by assembling the support column 4, the upper frame 5, and the lower frame 6. An intermediate frame 7 is fixed to an intermediate portion of the column 4, and a support arm 8 for supporting a support body described later is fixed to the intermediate frame 7. Those support arms 8
As shown in FIG. 6, a bearing bracket 10 that rotatably supports the support roller 9 and a bearing bracket 12 that rotatably supports the guide roller 11 are fixedly mounted on the upper portion.

Reference numeral 16 denotes an annular support member that is rotatably mounted on the support roller 9 about an axis in the up-down direction, and its movement in the radial direction is restricted by each guide roller 11, and a rotary drive mechanism (not shown) is used. It is designed to be rotated in one direction at a predetermined speed. A support 17 and a bearing 17a are fixedly mounted on the support 16 at a plurality of positions (8 in the drawing) at equal divisions. The support base 17 is composed of a support plate 18 established on the support body 16 and a support frame 19 fixed to the upper end of the support plate 18, and a bearing 20 for beam support is fixed to the support plate 18. The beam shaft 22 of the beam 21 is rotatably supported by the corresponding bearings 17a and 20, and the beam 21 is arranged between the adjacent supporting bases 17, respectively.

The rotation of the beam 21 is braked by a brake mechanism 23, and when the tension of a warp group A composed of a large number of warp yarns a drawn from the beam 21 reaches a predetermined level, the brake release mechanism 24 releases the brake. is there. In the brake mechanism 23, 25 is a chain wheel fixed to the end of the beam shaft 22, 26 is a brake shaft rotatably supported by a bearing 27 fixed to the support plate 18, and is a chain wheel 28. Brake pulleys 29 are attached to each. Chain on the chain wheels 25 and 28 above
Suspended 30 and pulled by tension chain wheel 31. A belt 33 having one end fixed to the support plate 18 via a stopper 32 is suspended from the brake pulley 29, and the other end of the belt 33 is connected to a pull rod 34. The tension rod 34 is slidably fitted in a hole of a holder 35 fixed to the support plate 18, and is biased by a compression spring 36 interposed between the tension rod 34 and the holder 35, thereby causing the belt 33 to move. It is pulled and pressed against the brake pulley 29. In the brake release mechanism 24, 37 is a support arm pivotally attached to the projecting portion 19a of the support frame 19 so as to be swingable, and is also disposed on the adjacent support bases 17, and the upper end portions of the pair of support arms 37. The end of the thread guide roller 38 is rotatably supported by the. A swing arm 40 is fixed to one support arm 37, and the swing arm 40 is connected via a rod 42 to one link 41a of an L-shaped link 41 pivotally attached to the support plate 18. The other link 41b of the L-shaped link 41 is in contact with the pull rod 34 by the tension of the warp yarn a suspended by the yarn guide roller 38.

Reference numeral 43 denotes an annular thread guide ring fixed to the support frame 19 via brackets 43a and 43b, and is arranged concentrically with the axis of the support body 17. A yarn guide reed 44 is fixed to the yarn guide ring 43 via a bracket 44a and guides each warp yarn a. Reference numeral 45 shown in FIG. 4 is a known triaxial weaving mechanism, which has a large number of two heddles 45a arranged in two rows in the weft insertion direction.
Each heddle 45a in the row guides the warp a to form a shed, and in that state weft is inserted, and each heddle 45a is inserted each time weft is inserted.
Are sequentially moved in the same direction as the rotation direction of the support 17, and the heddle 45a at the end is moved to the other row. Reference numeral 46 denotes a known take-up roller rotatably supported by a frame (not shown) of the triaxial weaving mechanism 45, which is rotated by an unillustrated drive mechanism in the arrow direction to take up the woven fabric b. I am doing it. Reference numeral 47 denotes a horizontal frame fixed to the upper frame 5, to which a pair of suspension frames 48 are fixed. 50 is a hanging frame
A holding body fixed to the lower end portion of 48 via a compensator cam described later, 51 is a movable yarn guide device arranged in the holding body 50, and is a large number by a chain that is slenderly suspended as is well known. The yarn guide 51a is rotated in the same direction in synchronization with the rotation of the heddle 45a. 52 is a hanging frame 48
A compensator cam fixed to the lower end of the warp is formed so as to guide the warp yarns a of each warp yarn group A drawn out from each beam 21 and guided to the triaxial weaving mechanism 45 so that the length thereof hardly changes. I am doing it.

Next, 54 is the warp a of the warp group A pulled out from the beam 21.
The tension adjusting device for adjusting the tension of the
As shown in the figure, they are arranged on a pair of adjacent support bases 17. In the tension adjusting device 54, a side plate fixed to the 55 support frame 19, and two thread support bars 56, a plurality of thread support rods 57, a plurality of dropper holding plates 58, and a thread guide reed between the pair of side plates 55. 68 is fixedly installed. The dropper holding plate 58 is located above the yarn support bar 56 and each yarn support rod 57, and a large number of droppers 59 having thread insertion grooves 59a as shown in FIG. 7 are fitted to the dropper holding plates 58. The elongated hole 59b is vertically movably fitted. Each dropper 59 rides on the warp yarn a lying on the yarn support bar 56 and each yarn support rod 57 by its own weight, and pushes down and applies tension.

Next, the warp tension balancer 1 shown in FIG. 1 and FIG.
As shown in FIGS. 6 and 6, they are arranged at positions corresponding to the mutual positions of the loci of the two warp groups A drawn from the adjacent beams 21. In the warp tension balancer 1, 60a and 60b are a pair of movable bodies, which are supported by support mechanisms 61a and 61b so as to be movable in a direction connecting two warp groups A, respectively. Support mechanism
Reference numerals 61a and 61b respectively include support columns 62a and 62b established on the support frame 19 and swing arms 63a and 63b pivotally attached to the upper surfaces of the support columns 62a and 62b, and the tip ends of the swing arms 63a and 63b. Movable body 60a, 60b
It's fastened. Hook bolts 64a, 64b are fixed to the middle portion of the pair of swing arms 63a, 63b, and the hook bolts 64a, 64b are fixed.
A tension spring 65 is stretched between a and 64b to form a pair of swing arms 63a and 63b.
Are urged toward each other. Movable body 60a, 60b
The lower surface of each of the warp groups A has a plurality of ends (for example, 10 to 20).
Book guides 66a, 66b capable of hooking the warp a
Are arranged side by side in the moving direction. Those thread guides 66a, 66b
Is located between the loci of two sets of warp yarn groups A drawn from the adjacent beams 21 as shown in FIG. 8 while the tension spring 65 is acting.

In the above structure, a plurality of beams 21 around which a large number of warps a are wound are supported by a pair of bearings 20 and arranged on the support 16 prior to operation. Next, the warp yarn a is pulled out from each beam 21, and the yarn guide roller 38 and the yarn guide reeds 68, 4
4, the thread guide ring 43, the compensator cam 52, and the thread guide 51a, and the rear winding roller 46 guided to the respective heddles 45a.
And perform the prescribed warp setting work. Further, the weight of the dropper 59 is applied to the thread supporting bar 56 and the warp thread a between the thread supporting rods 57 through the warp thread a drawn from each beam 21 into the thread insertion groove 59a of each dropper 59 in the tension adjusting device 54 to apply tension. The warp yarn a is pushed down and meandered by applying it.
The tensions acting on the warps a are made substantially equal.

Next, as shown in FIG. 8 (A), a plurality of corresponding movable bodies 60a, 60b in the warp tension balancer 1 are provided with a plurality of warp yarns a at the ends of two warp yarn groups A drawn from the adjacent beams 21. Hook on the thread guides 66a and 66b. In this case, the hooking positions on the yarn guides 66a and 66b are sequentially changed so that the warp locus a located closer to the end of the warp group A has a longer locus. Also, in order to prevent the tension difference in the warp group A from becoming extremely large, the thread guide 66
It is advisable to appropriately change the hooking position of the thread on the a and 66b. As a result, the warp threads a of both warp thread groups A stretch the tension springs 65 by their tensions, and the tensions are applied to the respective warp threads a by the spring force of the tension springs 65. Since the pair of movable bodies 60a, 60b are movably supported by the support mechanisms 61a, 61b in the direction of connecting both warp groups A, that is, in the direction of pulling the warp a of both warp groups A, the moving bodies 60a, 60b are Plural warp yarns a at the ends of both warp yarn groups A (warp yarns a hooked on the yarn guides 66a and 66b)
The total tension acting on the plurality of warp yarns a at the ends of both warp yarn groups A is balanced. Further, the plurality of warp yarns a hooked on the yarn guides 66a and 66b have a longer warp locus as the warp yarns a located at the ends of the warp yarn group A as described above. The tension applied by the tension spring 65 applied to the warp yarn group A is larger at the end portion of the warp group A and smaller at the inner portion thereof. Therefore, the thread guides 66a, 66b
The tension applied to the innermost warp a among the plurality of warps a hooked on the warp a is such that the tension applied by the tension spring 65 becomes extremely small, so that the adjacent warps not hooked on the yarn guides 66a and 66b. a (indicated by symbol a1 in FIG. 8 (A))
It does not differ much from the magnitude of the tension acting on. Further, the magnitude of the tension acting on the outermost warp a is balanced with the magnitude of the total tension acting on the plurality of warps a at the ends of both warp groups A as described above. A
The strength of the tension acting on the outermost warp yarn a is not so different, and as a result, the difference in the tension acting on all the warp yarns a is relaxed.

Next, when the operation of the triaxial weaving loom 2 is started in the above state, the heddle 45a of the triaxial weaving mechanism 45 guides the warp a to open the shed and weft inserts to form the woven fabric b. ,
The heddles 45a on both sides laterally move in opposite directions to rotate the guide portion of the warp a in one direction. In addition, the movable thread guide device 51
The yarn guide 51a and the support 16 synchronously rotate in the rotation direction of the heddle 45a, and the guide portions of the warp yarns a drawn out from the respective beams 21 rotate in the same direction. Further, the winding roller 46 winds the woven fabric b and pulls the warp yarns a drawn out from the respective beams 21. As a result, the tension of the warp yarns a of the respective warp yarn groups A becomes large and the yarn guides of the respective brake release mechanisms 24. The roller 38 is pulled toward the center of the support 16. As a result, the thread guide roller 38 swings the swing arm 37 to rotate the L-shaped link 41, and the link 41b pushes the pull rod 34 to release the tension of the belt 33, whereby the braking force of the brake pulley 29 is increased. After the release, the beam 21 is lightly rotated, and the beam 21 is rotated in the warp drawing direction by the tension of the warp a of the warp group A. When the tension of the warp yarn a of the warp yarn group A is reduced by the rotation of the beam 21, the compression spring 36 swings the swing arm 37 in the opposite direction and pulls the belt 33 to rotate the brake pulley 29 and the beam 21 again. Brake.

The warp group A drawn from each beam 21 in association with the above weaving
The warp threads a are rotated in the rotation direction of the support body 16, and at this time, each warp thread a is guided by the compensator cam 52 so that the length thereof hardly changes. Fluctuation becomes small. However, the tension of the warp yarns varies to some extent during weaving due to manufacturing errors of each part of the triaxial weaving loom 2, changes in sliding resistance of the warp yarns a, warp errors of the beam, and the like. There may be a difference in the tension of the warp a on one end side of the warp group A to increase and the tension of the warp a on the other end side to decrease. The tension may be extremely large with respect to the tension of the warp yarn a at the other end. In that case, as described above, a plurality of warp yarns a at the ends of both warp yarn groups A are formed.
Since the magnitude of the total tension acting on the warp yarns is balanced by the yarn tension balance device 1, for example, the tension acting on the right warp yarn a of the adjacent warp yarn groups A with respect to the tension acting on the left warp yarn a. If it gets bigger, the eighth
As shown in Fig. (B), a plurality of warp yarns a on the side with a large tension
Pulls the yarn guide 66b to move the movable body 60b to the right, and moves the left movable body 60a to the right through the tension spring 65 to pull the left warps a, thereby pulling the left warps a. The tension acting on the warp yarns is increased to be balanced with the tension acting on the right warps a. Moreover, as described above, the plurality of warp yarns a of the warp yarn group A have a longer warp locus for the warp yarns a located at the ends, so that the tension applied by the tension spring 65 becomes larger for the outer warp yarns a. The tension difference between all the adjacent warp yarns a is reduced, and as a result, weaving unevenness can be prevented during weaving and the quality of the triaxial woven fabric can be improved.

FIG. 9 shows a different embodiment of the warp tension balancer. A guide groove 80a for connecting adjacent warp groups is formed in a holding body 80 fixed to a support base, and a large number of thread guides are formed in the guide grooves 80a. The movable bodies 60ae and 60be with 66ae and 66be are slidably fitted to each other, and a tension spring 65e is stretched between the movable bodies 60ae and 60be.

The warp tension balancer of the present application can be similarly applied to a beam type loom other than the triaxial weaving loom. A compression spring or the like may be used as the spring.

EFFECTS OF THE INVENTION As described above, in the warp tension balancer of the present invention, 2
A pair of movable bodies corresponding to the pair of warp groups are movably arranged in the direction connecting the two sets of warp groups, and the movable bodies are connected via a spring, and the ends of the warp group are respectively connected to the movable bodies. Since a plurality of thread guides capable of hooking a plurality of warp threads of a part are arranged side by side in the moving direction, the plurality of warp threads at the end of the warp thread group pulled out from the beam during weaving correspond to the corresponding thread guides of the moving body. The ends of two adjacent warp groups are hooked together so that the yarn path length becomes longer toward the end, and a plurality of warp threads at the ends of two adjacent sets of warp groups are attached by springs to form ends of two adjacent sets of warp groups. The additional tension of the same magnitude can be applied to each of the plurality of warp yarns as a whole, and the difference in tension between the adjacent warp yarns at the extreme ends of the two warp yarn groups can be reduced. Therefore, during weaving, when the tension acting on the warp at the end of one warp group is about to become greater than the tension acting on the warp at the end of the other warp group, that one warp group passes through the spring to the other. The moving body can be drawn to balance the warp tensions of the adjacent beam ends, and as a result, the difference in tension between the warp yarns at the beam ends can be relaxed and weaving unevenness can be prevented.

Further, in the triaxial weaving loom of the present invention, the warp tension balancer pulls a plurality of warp yarns at the ends of the warp group drawn out from two adjacent beams to balance the tension between the warp yarns at the beam ends. Therefore, when the tension of one warp at the end of the adjacent warp group becomes larger than the tension of the other warp, the one warp pulls the other warp through the spring and both warps are pulled. The tension of can be balanced. As a result, it is possible to reduce the difference in tension between the warps at the ends of the adjacent beams, prevent uneven weaving of the triaxial fabric, and improve the quality.

[Brief description of drawings]

1 is a perspective view of a warp tension balancer, and FIG. 2 is a perspective view of FIG.
II-II line enlarged sectional view, FIG. 3 is a plan view of a triaxial weaving loom shown with a part omitted, FIG. 4 is a sectional view taken along line IV-IV of FIG. Fig. 5 is an enlarged view of the main part of Fig. 3, Fig. 6
FIG. 7 is an enlarged view of a main part of FIG. 4, FIG. 7 is a partial view showing a part of the tension adjusting device, FIGS. 8A and 8B are explanatory views showing the action of the warp tension balancer, and FIG. FIG. 6 is a perspective view showing another embodiment of the warp tension balancer. a: warp, A: warp group, 1 ... warp tension balancer,
2 …… Triaxial weaving loom, 16 …… Support, 21 …… Beam, 45
...... Triaxial weaving mechanism, 52 …… Compensator cam, 60a, 6
0b: movable body, 65: tension spring, 66a, 66b: thread guide

Claims (2)

[Claims] 1. A weaving machine in which a plurality of beams around which a plurality of warp yarns are wound are arranged side by side in a ring shape on a support, and the warp yarns are drawn from the beams to weave, and two sets of warp yarns are drawn from adjacent beams. A pair of movable bodies corresponding to the two sets of warp groups are movably arranged in a direction connecting the two sets of warp groups at positions corresponding to each other between the group loci, and the ends of the warp group are respectively attached to the movable bodies. Warp tension balancer for a loom, characterized in that a plurality of yarn guides capable of hooking a plurality of warp yarns of a portion are arranged in parallel in the moving direction, and the pair of movable bodies are connected via a spring. 2. An annular support is rotatably provided on a frame about an axis in the vertical direction, and a plurality of beams around which a plurality of warps are wound are rotatably provided at equal division positions on the support. In a triaxial weaving machine, the frame is provided with a compensator cam for guiding the warp of each warp group drawn from each beam and guided to the triaxial weaving mechanism so that the length of the warp hardly changes. A warp tension balancer is provided, in which a plurality of warp yarns at the ends of a warp yarn group drawn out from two matching beams are pulled by a spring to balance the tension between the warp yarns at the beam ends. Triaxial weaving loom.