JP3033867B2 - Warp tension adjusting device for loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warp tension adjusting device for a loom for drawing and weaving warp yarns from a plurality of beams, such as a triaxial weaving loom and a circular loom.

[0002]

2. Description of the Related Art As a conventional warp tension adjusting device as a triaxial weaving loom, as disclosed in Japanese Patent Application Laid-Open No. Hei 1-2201550, a plurality of beams wound with a large number of warps are supported on a frame support. The frame is provided with a compensator cam which is pulled out from each beam, guided to the triaxial weaving mechanism, and guided so that the warp length of each warp group hardly changes, and further provided between the ends of the warp group ends. A plurality of warps are hooked on the corresponding yarn guides of the moving body, and two
The tension acting on the plurality of warps at the ends of the two warp groups changes during lamination and weaving of the plurality of warps at the ends of the warp group by a tension spring, and acts on the warp at one end of the warp group. If the tension is to be greater than the other, one of the warps draws the moving body and the other moves through the tension spring to increase the other warp tension, thereby increasing the warp tension of the other two warp groups. The tension acting on a plurality of warps is balanced.

[0003]

As described above, in the loom in which each beam is rotated by the tension of the warp to draw out the warp, the warp of each warp group is controlled so that its length hardly changes. Even with a compensator cam for compensating, the tension of the warp changes during weaving due to a manufacturing error of each part of the loom, a change in sliding resistance of the warp, and the like, and a tension difference occurs between the warps. As a result, a difference in tension occurs between the warps in each beam, and the tension of the warp at one end of the warp group drawn from each beam increases, and the tension of the warp at the other end may decrease. . In that case, the difference in tension between adjacent warp yarns between adjacent beams becomes extremely large, causing a large step in tension between the warp yarns and uneven weaving in the woven fabric. It is used to balance the warp tension at the end of the beam, but in such a balancing method, several warps at the end are pulled by the yarn guide in one beam, so that the tension is pulled by the yarn guide. Inflection points of tension occur between the end of the warp yarn being warped and the warp pulled by the yarn guide adjacent thereto, and at these inflection points, the tension change is not smooth, and as a result, the texture of the woven fabric is affected. This adversely affected the quality of the fabric.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a loom for arranging a plurality of beams around which a large number of warp yarns are wound in a ring on a support, drawing out the warp yarns of the beams, and weaving. One of the beams or rollers in the combination of one beam and the rollers arranged in the warp path corresponding to the beam is used as a tension detection roller, and both ends of each tension detection roller can be reciprocated in the direction of movement by warp tension based on both ends. And swingable in the direction of movement by supporting the center of each swinging arm that straddles the opposite end of the adjacent tension detection roller on the base. The two ends of each swing arm are connected to the ends of the corresponding tension detection rollers, and the movement of the connection end of one adjacent tension detection roller to one side in the moving direction is connected to the other tension detection roller. edge Characterized in that it has to tell the movement in the moving direction other side.

[0005]

When a large number of warps drawn from a plurality of beams are wound around a tension detecting roller for weaving, if the warp tension of the warp group of one of the adjacent tension detecting rollers becomes high, the entire tension detecting roller is driven by the warp tension. Each swing arm that is moved in the moving direction or the direction inclined with respect to the moving direction and straddles between the adjacent tension detecting rollers swings around the central portion pivotally supported by the base and is adjacent to each other. The movement of the one tension detecting roller to one side in the moving direction of the connection end due to the warp tension is transmitted as the movement of the other tension detecting roller to the connecting end to the other side, and the other tension detecting roller as a whole is moved to the other side. The warp group is moved or tilted in a direction to increase the tension of the warp group guided by the tension detecting roller. Thus, the warp tensions at the ends of the warps drawn from the adjacent beams are balanced. Thus, when the end warp tension between the beams is balanced, the entire tension detecting roller moves and tilts, so that the tension change in the beam becomes smooth.

[0006]

7 and 8 show the triaxial weaving loom 1 with a part omitted. In this triaxial weaving loom 1, reference numeral 3 denotes a fixedly installed frame, which includes a support 4, an upper frame 5, and a lower frame 6.
Is constructed in a framework. An end of an intermediate frame 7 is fixed to an intermediate portion of the height of each column 4, and a support arm 8 is fixed to the intermediate frame 7. As shown in FIG. 2, a bearing bracket 10 rotatably supporting the support roller 9 and a bearing bracket 12 rotatably supporting the guide roller 11 are fixed on the support arms 8. Reference numeral 16 denotes an annular support member rotatably mounted on the support roller 9 about an axis in the vertical direction, the movement of which is restricted in the radial direction by each guide roller 11, and a known rotary drive (not shown). It is configured to be rotated in one direction at a predetermined speed by a mechanism. The support bases 17 are fixed to the support 16 at a plurality of (eight in the drawing) equally divided positions. The support 17 is the support 1
6 and a support frame 19 (base) fixed to the upper end of the pair of support plates 18. Beam support bearings 20 are fixed to the support plates 18. A pair of corresponding bearings 20 rotatably support a beam shaft 21 a of the beam 21, and the beam 21 is disposed between the adjacent supports 17. A chain wheel 22 is fixed to the beam shaft 21a as shown in FIG.

Reference numeral 23 denotes an annular thread guide ring fixed to the support frame 19 via a bracket (not shown).
It is arranged concentrically with the axis of the holder 17. Reference numeral 24 denotes a yarn guide reed fixed to the yarn guide ring 23 via a bracket (not shown), and guides each warp a fed from each beam 21. Reference numeral 25 denotes a known triaxial weaving mechanism, which includes two rows of a large number of heddles 25a arranged as rows in the weft insertion direction, and each of the two rows of heddles 25a guides a warp a to form a shed. Each time the weft is inserted, each time the weft is inserted, each warp 25a is alternately moved in a row unit in the same direction as the rotation direction of the support base 17, and the end heddle 25a is moved to the other row. It is.

Reference numeral 26 denotes a known take-up roller rotatably supported by a frame (not shown) of the triaxial weaving mechanism 25. The take-up roller 26 is rotated in a direction indicated by an arrow by a drive mechanism (not shown) to woven the woven fabric b. It is wound up. Reference numeral 27 denotes a horizontal frame fixed to the upper frame 5, to which a pair of suspension frames 28 is fixed. Reference numeral 30 denotes a holder fixed to the lower end of the suspension frame 28 via a compensator cam described later, and 31 denotes a holder 30
The movable yarn guide device is provided with a plurality of yarn guides 31 by an elongated chain which is known in the art.
a is rotated in the same direction in synchronization with the rotation of the head 25a. Reference numeral 32 denotes a compensator cam fixed to the lower end of the suspension frame 28 so as to guide each warp a drawn from each beam 21 and guided to the triaxial weaving mechanism 25 so that its length hardly changes. It is formed.

Next, as shown in FIG. 1, FIG. 2, FIG. 3, and FIG. 9, a tension for uniforming the tension of the warp a drawn from each beam 21 is provided on the triaxial weaving loom 1 as described above. The tension equalizing device 33 is provided.
3 will be described. The tension equalizing device 33 includes a warp tension adjusting device 150 for balancing the tension between the end warps a between the adjacent beams 21 according to the present invention, and a tension for equalizing the total tension of the warp a between the adjacent beams 21. A pressure equilibrium device 55, a detection device 70 for detecting a change in total tension, and a feeding device 34 for positively rotating each beam 21 based on a signal from the detection device 70 are provided.

First, reference numeral 34 denotes a feeding device for synchronizing and feeding each beam 21 and rotating the beam 21 as shown in FIGS. In the feeding device 34, reference numeral 35 denotes a rotating shaft supported by a bearing 36 attached to the support plate 18, and the end of each rotating shaft 35 is connected to the end of an adjacent rotating shaft 35 via a rotating joint 37. ing. Each rotating shaft 3
5 includes a chain wheel 38 at a position corresponding to the chain wheel 22 of the beam 21.
The chain wheel 38 and the chain wheel 22 are fixed as shown in FIG.
A chain 41 is suspended around a tension wheel 40 attached to a bracket (not shown). Reference numeral 42 denotes a pair of support plates fixed to the upper surface of the support 16, and reference numeral 43 denotes an L-shaped mounting bracket pivotally supported on the support plate 42 through a pivot 44 so as to be vertically swingable. A contact screw 45 is attached, and the head of the contact screw 45 is
It is supported substantially horizontally by being brought into contact with a receiving frame 46 fixedly provided therebetween. Reference numeral 47 denotes a drive motor fixed to the side wall of the mounting bracket 43. A chain wheel 48 is fixed to the drive shaft 47a. Reference numeral 49 denotes a speed reducer fixed to the lower wall of the mounting bracket 43. Axis 49
Chain wheels 50 and 51 are fixed to b, respectively. A chain 52 is suspended between the chain wheel 48 and the chain wheel 50, and a chain 54 is suspended between the chain wheel 51 and the chain wheel 53 fixed to the rotating shaft 35.

Next, the warp tension adjusting device 150 of the present application will be described. As shown in FIGS. 4, 5, and 6, support arms 56 are attached to the tips of the adjacent support frames 19, respectively. 5
9 is disposed in the middle of the warp path for each beam 21;
A tension detecting roller around which the warp a is wound is rotatably supported on a support shaft 57 provided between the support arms 56. Support shaft 5
7 are supported on slide blocks 101 and 102, and one shaft end of the support shaft 57 is
The first bearing 117 is supported so as to be slidable and rotatable in the axial direction. The other shaft end of the support shaft 57 is rotatably supported by a bearing 118 of the slide block 102. Cam followers 103, 104 rotatable on the outer surface and the upper and lower surfaces of each slide block 101, 102.
Each of the cam followers 103 and 104 is provided with a vertically opposed guide surface 100a, 100b provided on the support arm 56.
The slide blocks 101, 102 are guided by guide grooves 100c, 100d provided in the front-rear direction along the movement direction X by the warp tension so that the slide blocks 101, 102 can be inclinedly guided in the front-rear direction and around the cam follower 104 with respect to the front-rear direction. The detection roller 59 is supported so as to be able to move forward and backward and tilt.

The adjacent slide blocks 101,
A rotatable roller 10 having a swing arm 105 attached to both ends thereof is provided on the front surface (in the moving direction X by the warp tension).
6, the center of the swing arm 105 is supported by an arm shaft 107 fixed to the support frame 19, and is swingable in the movement direction X. Pressing devices 110 and 111 press the tension detecting rollers 59 in the front-rear direction in the warp tension direction, and are disposed before and after both ends of each tension detecting roller 59, respectively. As shown in FIG.
The pressing roller 1 is mounted on the supporting arm 56 so as to be slidable in the front-rear direction along the moving direction X, and is rotatable at the tip.
The pressing roller 113 of the pressing device 110 is urged toward the slide blocks 101 and 102 by the compression force of a spring 114 interposed between the inner wall 112a of the sliding body 112 and the plate surface 112b.
01 and 102, and the pressing device 111 on the side to which the warp tension is applied is provided between the pressing roller 113 and the slide blocks 101 and 102.
05 roller 106 interposed and slide block 10
1, 102 are pressed.

Reference numeral 115 denotes an adjustment rod 11 for setting each tension detecting roller 59 at a predetermined position.
At 5, one end is screwed to the sliding body 112. At the other end, an adjusting collar 116 is screwed. The adjusting collar 116 is rotated to set the tension detecting roller 59 at a predetermined position.
Are fixed to the adjusting rod 115 by screws provided in the adjusting rod 115. The pressurizing devices 110 and 111 use the tension detecting roller 5 when the warp a is wound on the tension detecting roller 59.
9 or a thread guide roller 60 to be described later so as not to fluctuate, and the warp hooking operation becomes easy.
It is not an essential requirement in the present invention. In the tension-pressure equilibrium device 55, a pair of swing arms 5
The lower portions of the thread guide rollers 60 are rotatably supported on the upper portions of the pair of swing arms 58, 58. One end of an operating arm 61 is integrally fastened to one end of the support shaft 57, and a rotatable roller 61a is attached to the other end. A support bracket 62 is fixed to the one support arm 56, and a cylinder body 63a of a hydraulic cylinder 63 such as a hydraulic cylinder is fixed to the support bracket 62.
Are fixed so that the piston rod 63b faces the operating arm 61.

A guide rail 62a is provided on the side of the support arm 56.
Is fixed, and a sliding body 62b is mounted on the guide rail 62a so as to be vertically movable. A receiving plate 64 is fixed to the distal end of the piston rod 63b.
A spring 65 is interposed between the roller 61a and the roller 61a so as to contact the lower surface of the sliding body 62b. A fluid such as oil is sealed in the piston chamber 63c of each of the fluid pressure cylinders 63 as shown in FIG.
8 communicate with each other. Therefore, each beam 2
The total tension of one warp a acts on the fluid in the piston chamber 63c of each hydraulic cylinder 63 to be balanced, and these fluid pressures are transmitted to each other so that the warp a of each beam 21 is transmitted.
Have the same magnitude.

Next, 70 shown at the upper right of FIG.
This is a detection device for detecting a change in the total tension of the warp a drawn from No. 1 and is configured as shown in FIGS. In this detection device 70, 71 is the support 16
A fluid cylinder in which a cylinder body 71a is fixed so that a piston rod 71b faces upward, a fluid is sealed in a lower piston chamber 71c, and the piston chamber 71c is connected to each fluid pressure by the communication pipe 68. Cylinder 63
Of the piston chamber 63c. A receiving plate 72 is fixed to the distal end of the piston rod 71b.
Detected piece 73 is fixed to the end. Numeral 74 denotes a support bracket fixed to the support plate 18 so as to be located above the receiving plate 72. An adjusting screw 75 is attached to the supporting bracket, and a receiving plate 76 is fixed to the lower end of the adjusting screw 75. This receiving plate 7
A spring 77 is interposed between 6 and the receiving plate 72.
Two guide rods 78 are arranged in parallel between the receiving plate 76 and the support 16, and these guide rods 78 pass through the receiving plates 72 and 76 to prevent them from rotating.

Reference numeral 79 denotes a support bracket fixed to the support 16, and reference numeral 80 denotes a displacement detector fixed to the support bracket 79, and a detection unit faces the detection piece 73. The displacement detector 80 detects the change in the pressure of the fluid in the piston chamber 71c as an electric signal by detecting the position of the detected piece 73, and detects the change in the total tension of the warp a of each beam 21. Are transmitted to a control device (not shown). This control device is disposed on the support 16 or the frame 3, controls the rotation speed of the drive motor 47 of the feeding device 34 based on the detection value of the displacement detector 80, and The total tension of a is always kept constant at a predetermined value set in advance. Since this control device can be easily implemented by a conventionally well-known electric control technique, a detailed description thereof will be omitted. 7 and 8, reference numeral 90 denotes a known dropper device.

In the above configuration, prior to the operation, a plurality of beams 21 around which a number of warps a are wound are respectively supported on a pair of bearings 20 and disposed on the support 16. The chain 41 is suspended around the chain wheel 22 of each beam 21 and the chain wheel 38 on the rotation shaft 35, and the chain 41
To give tension. Next, the warp a is pulled out from each beam 21 and guided by the tension detecting roller 59 and the yarn guide roller 60, and then passed through the thread insertion groove of each dropper of the dropper device 90, as is well known, and the yarn guide reed 24, the yarn Guide ring 2
3. After being guided by the compensator cam 32 and the yarn guide 31a and led to the respective heads 25a, the guide is led to the winding roller 26 to perform a predetermined warp setting operation.

In the warp setting operation, each beam 2
When the warp a drawn out from the reel 1 is wound by the wind-up roller 26 and tension is applied to the warp a, each warp a of each beam 21 pulls the yarn guide roller 60 leftward in FIG. Swing the arms 58, 58 in the same direction,
As a result, the support shaft 57 rotates and the operation arm 61 swings, and the operation arm 61 compresses the spring 65. The spring force of the spring 65 acts on the fluid in the piston chamber 63c of the fluid pressure cylinder 63 via the receiving plate 64 and the piston rod 63a. The swing of the swing arms 58, 58 and the working arm 61 stops when the total tension of the warp a of the corresponding beam 21 and the pressure of the fluid in the fluid pressure cylinder 63 are balanced. A pressure corresponding to the total tension of the warp a of the corresponding beam 21 acts on the fluid.

The pressure acting on the fluid in each of the fluid pressure cylinders 63 is transmitted to the fluid in the other fluid pressure cylinders 63 via the fluid in the communication pipe 68, whereby the pressure of the fluid in each fluid pressure cylinder 63 is reduced. As a result, the total tensions of the warps a drawn from the respective beams 21 are the same. The pressure of the fluid in the fluid pressure cylinder 63 is transmitted to the fluid in the fluid pressure cylinder 71 of the detection device 70, and the piston rod 71 b of the fluid pressure cylinder 71 applies a spring 77 via a receiving plate 72 to the spring 77 by the fluid pressure. Compress to a position that balances with thrust. The detected piece 73 is also raised by the rise of the receiving plate 72, and the position detector 80 detects the total tension of the warp a of each beam 21 by detecting the magnitude of the fluid pressure at that time. Therefore, a predetermined amount of tension is applied to the warp a based on the value detected by the position detector 80. Under these conditions, the tension detecting roller 59
2 is also pulled leftward in FIG. 2 by the warp tension.

As described above, when the total tension in each beam 21 becomes the same, when there is a tension difference between the beam end warps of the adjacent beams 21, that is, one end tension of each beam 21 is large, and the other end tension is large. Is small, and one end of one beam 21 is adjacent to the beam 2
When the tension detecting roller 59 corresponding to one beam 21 is opposed to the other end of the first block 1, the high tension side end of the tension detecting roller 59 is moved forward in accordance with the tension distribution, whereby the corresponding slide block 101 (or 102) is moved. Is moved along the guide grooves 100c and 100d of the support arm 56 in the direction of movement by warp tension to press one end of the swing arm 105. The oscillating arm 105 is oscillated about a center portion, and the other tension detecting roller 5 is
The 9th slide block (101) 102 is moved in the direction in which the warp tension is increased (rearward), and the difference in the end warp tension applied to the adjacent tension detecting rollers 59, 59 is balanced. In this way, the whole of the adjacent tension detecting rollers 59 is moved or inclined to balance the warp tensions at the ends of the beams 21, thereby smoothing the change in the warp tension in each beam 21.

Next, when the operation of the triaxial weaving loom 1 is started in the above state, the heddle 25a of the triaxial weaving mechanism 25 guides the warp a, opens the shed, and inserts the weft into the woven fabric b. The weddle 25a on both sides moves sideways in opposite directions to rotate the guide portion of the warp a in one direction. Further, the yarn guide 31a of the movable yarn guide device 31 and the support 16 are synchronously rotated in the rotational direction of the heddle 25a,
The guide portions of the warp a pulled out of the shaft are rotated in the same direction. Further, the winding roller 26 winds the woven fabric b and pulls the warp a drawn from each beam 21, and the total tension of the warp a of each warp group A moves each yarn guide roller 60 to the center side of the support 16. To pull. As a result, each thread guide roller 60 swings the swing arm 58 to swing the working arm 61, and the working arm 61 compresses the spring 65 to increase the pressure of the fluid in each fluid pressure cylinder 63. The pressure of the fluid in each hydraulic cylinder 63 is transmitted to the fluid in the other hydraulic cylinder 63 as described above, and
The fluid 3 has the same pressure, and the total tension of the warp yarns unwound from each beam 21 is the same.

As described above, during weaving, since the total tension of the warp yarns unwound from each beam 21 becomes the same, the difference in the tension of the warp yarn a between the adjacent beams 21 becomes small. Weaving spots between the beams 21 can be eliminated. The fluid pressure of the fluid pressure cylinder 63 is transmitted to the fluid of the fluid pressure cylinder 71 of the detection device 70 as described above, and the piston rod 71 b is
7 is moved (elevated) to the equilibrium position. The detected piece 73 rises due to the rise of the receiving plate 72, and the displacement detector 80 detects the rise of the detected piece 73, whereby each beam 21 is detected.
It is detected that the total tension of the warp a that has been fed from the machine has increased. When the increase in the total tension of the warp a is detected in this manner, the drive motor is accelerated in accordance with the detection signal, and the rotation of the motor shaft 47a is transmitted to the rotation shaft 35 via the speed reducer 49 and the like. Is transmitted to each beam 21 to feed out the warp a, and the total tension of each warp a is set to a predetermined tension. When the total tension a becomes smaller than a predetermined value during weaving, it goes without saying that the drive motor 47 is decelerated to make the total tension a predetermined tension.

While the total tension between the beams 21 is controlled to be the same, the tension detecting roller 59 as a whole is moved back and forth and inclined between the adjacent beams 21 according to the tension distribution in the beam 21 as described above. The tension of the end warp is the same. Therefore, the action of equalizing the total warp tension between the beams 21 described above, the action of equalizing the end tension, and the action of feeding out and rotating the beam 21 so that the total tension of the warp becomes a predetermined constant tension, Weaving can be performed in a state where the warp tensions unreeled from the respective beams 21 are all the same, the unevenness of the woven fabric can be prevented, and the feeling can be improved. In the present embodiment, the feed-out device 34 for the beam 21 is controlled by the tension / pressure equilibrium device 55 so that the total tension between the beams 21 is the same. However, the warp tension change in the beam 21 is made smooth. These are not essential components for the purpose of the present application.

[0024]

As described above, according to the present invention, a warp tension detecting roller is provided in a warp path, and a swing arm is straddled over the opposite end of the tension detecting roller, and the connection end of one tension detecting roller is connected. The movement of the warp in one beam is transmitted as the movement of the connection end of the other tension detection roller to the other in the movement direction. The change in tension can be smoothed, and uneven weaving due to warp tension fluctuation can be prevented to improve the quality of woven fabric.

[Brief description of the drawings]

FIG. 1 is a plan view partially showing a warp tension adjusting device of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is an explanatory view showing an end connection of a tension detecting roller.

FIG. 5 is a V view of FIG. 4;

FIG. 6 is an explanatory diagram viewed from a VI-VI line direction in FIG. 4;

FIG. 7 is a plan view of the triaxial weaving loom with a part omitted.

FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG. 7, with a part omitted.

FIG. 9 is an explanatory view of a tension equalizing device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Triaxial weaving loom, 16 support body, 19 support frame (base), 21 beam, 34 feeding device, 5
5 tension / pressure equilibrium device, 56 support arm, 59 tension detection roller, 101, 102 slide block, 10
5 Swing arm, 107 arm axis, a warp

Continuation of front page (56) References JP-A-1-201550 (JP, A) JP-A-3-90655 (JP, A) JP-A-2-11184 (JP, U) JP-A-63-42178 (JP) U.S. Pat. No. 4,170,249 (US, A) U.S. Pat. No. 4,020,876 (US, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) D03D 41/00 D03D 37/00 D03D 49/12

Claims (1)

(57) [Claims] In a weaving machine for arranging a plurality of beams on which a number of warp yarns are wound in a ring on a support, drawing out the warp yarns of the beams and weaving, one beam and a correspondingly arranged warp path. One of the beams or rollers in the combination of rollers provided is a tension detecting roller, and both ends of each tension detecting roller are supported on the base so that they can reciprocate in the direction of movement by warp tension and can tilt with respect to the direction of movement. In addition, the base is provided with swinging arms that straddle the opposite ends of the adjacent tension detecting rollers so as to be swingable in the movement direction by pivotally supporting the center thereof, and correspond to both ends of each swinging arm. It is connected to the end of the tension detection roller, and the movement of the connection end of one adjacent tension detection roller to one side in the moving direction is transmitted as the movement of the connection end of the other tension detection roller to the other side in the direction of movement. Nishiko And a warp tension adjusting device for a loom.