JPH05321089A - Method for keeping tenseness of woven cloth - Google Patents

Abstract

PURPOSE:To keep the tenseness of a woven cloth so as to completely perform the cutting and the doffing of a woven cloth extending from a loom during the weaving. CONSTITUTION:The objective method is to keep the tenseness of a woven cloth (18) extending from a loom (10) during the weaving, fed to the loom, brought into contact with an empty cloth roll (26) rotatably supported by the loom and wrapped from the loom around a full cloth roll (20) placed on a pedestal (22) near the loom. The empty cloth roll is rotated so as to apply a frictional force directing from the full cloth roll toward the loom to the woven cloth or partial motion of the woven cloth is prevented on the side of the empty cloth roll from a cutter (24) for cutting the woven cloth installed between the empty cloth roll and the full cloth roll.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for maintaining the tension of a woven fabric for slicing it from a loom during weaving.

[0002]

2. Description of the Related Art Conventionally, during weaving, a full cross roll, on which a woven cloth of a predetermined length is wound, is transferred from a loom to a pedestal in the vicinity thereof, and after supplying an empty cross roll to the loom,
The woven cloth is cut and cut by cutting the woven cloth with a cutter provided between the empty cloth roll and the full cloth roll (JP-A-3-14656).
issue).

[0003]

However, in order to increase the length of the woven cloth by weaving after the full cross roll is transferred to the pedestal and before the cloth is cut off, the loom and the full cloth are increased. The tension of the woven fabric between the cloth roll and the cloth roll is reduced, which may result in incomplete cutting of the woven fabric by the cutter, that is, incomplete cutting of the woven fabric.
It is an object of the present invention to maintain the tension of the woven fabric so that the woven fabric extending from the weaving machine during weaving can be completely scoured.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to an empty cross roll that extends from a weaving loom, is fed to the loom, and is rotatably supported by the loom, from the loom to a pedestal in the vicinity thereof. A method of maintaining tension of a woven fabric wound around a placed full cross roll, comprising rotating the empty cross roll to exert a frictional force on the woven fabric from the full cross roll toward the loom. It is characterized by Instead of rotating the empty cloth roll, a part of the woven cloth is moved on the empty cloth roll side from the cloth cutting cutter provided between the empty cloth roll and the full cloth roll. You may block it. The movement of a part of the woven cloth to the loom is prevented while a tensile force is applied to the woven cloth from the full cross roll toward the loom.

[0005]

According to the present invention, the woven cloth is pulled toward the loom due to the frictional force acting between the empty cloth roll and the woven cloth due to the rotation of the empty cloth roll. Receive power. Therefore, even if the length of the woven fabric is increased due to continued weaving, the tension of the woven fabric is maintained between the full cross roll and the empty cross roll, and the woven fabric is laid between them. Can be done completely. Further, by stopping the progress of a part of the woven cloth on the side of the empty cross roll from the cutter, it is possible to maintain the tension of the woven cloth between the part of the woven cloth and the full cross roll. it can. By preventing movement of a portion of the woven fabric while exerting a tensile force on the woven fabric, greater tension can be maintained on the woven fabric.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1, a pair of parallel rollers 14 spaced apart in the anteroposterior direction are provided at the bottom of a pair of spaced parallel frames 12 defining the front of a loom 10. 16 is rotatably supported. A cross roller 20 is placed on each of the rollers 14 and 16 for winding a woven fabric 18 which is woven by the loom 10 and extends to the front of the loom, as indicated by an imaginary line. In the illustrated example, the rear roller 16 is driven and rotated in the clockwise direction, whereby the cross roll 20 in contact with both rollers 14 and 16 is rotated in the counterclockwise direction. At this time, the front roller 16 is driven in the clockwise direction. The peripheral speed of the drive roller 16 is set to be higher than the weaving speed. By the rotation of the cloth roll 20, the woven fabric 18 is wound around the cloth roll 20. The rotation of the cross roll 20 for winding the woven cloth 18 is performed by placing the cross roll 20 on the pair of rollers 14 and 16 shown in the figure, and for example, the both ends of the cross roll 20 are supported and the cross roll 20 is rotated. It may be carried out by engaging a driving gear with a plurality of teeth formed on the entire circumference of the end portion of and to give a rotational force.

When the woven cloth 18 having a predetermined length is wound around the cloth roll 20, the cloth roll 20, that is, the full cloth roll is, as shown by a solid line, the loom 10
It is transferred to a pedestal 22 provided in front of. Cradle 2
A rotary cutter 24 for cutting a woven cloth is provided between the full cross roll 20 and the empty cross roll 26 described later on the pedestal 22 in the illustrated example. While the full cross roll 20 is moved from the rollers 14 and 16 to the cradle 22, a new cross roll, the empty cross roll 26, is added to the double rolls 1.
4,16. At this time, empty cross roll 2
6 comes into contact with the woven fabric 18 that goes around the front roller 14 via the other plurality of rollers 28 to 38 rotatably supported by both frames 12.

After the full cross roll 20 is transferred and the empty cross roll 26 is supplied, the rear roller 16 is rotated counterclockwise through a drive mechanism described later, and the empty cross roll 26 in contact with the roller 16 is rotated clockwise. Cause rotation to. The woven cloth 18 receives a pulling force from the full cloth roll 20 toward the loom 10 due to the friction generated between the empty cloth roll 26 rotating clockwise and the woven cloth 18 in contact therewith. During this time, since the weaving by the loom 10 is continued, the length of the woven cloth 18 gradually increases between the loom 10 and the full cross roll 20. However, the woven cloth 18 moves forward due to the tensile force exerted on the woven cloth 18. The tension between the roller 14 and the full cross roll 20 on the pedestal 22 is maintained. While the tension of the woven cloth 18 is maintained, the woven cloth 18 is cut, that is, cut in the width direction, by the cutter 24 that moves the pedestal 22 in parallel with the loom 10. For this reason, the cutting by the cutter 24 is favorably performed.

The roller 16 is a sprocket 29 provided on one end of the roller 16 and a motor (not shown) mounted on one frame 12 and rotatable in both forward and reverse directions.
And a sprocket 31 fixed to the drive shaft of the motor
And the chain 3 hung on both sprockets 29 and 31
It is driven and rotated by a drive mechanism including 3 and 3. The rotational force of the motor is transmitted to the roller 16 via the sprocket 31, the chain 33 and the sprocket 29.

The full cross roll 20 is transferred onto the pedestal 22, and the empty cross roll 26 is replaced with the pair of rollers 14, 1.
6, a pair of rocking members 40 (only one of which is shown) extending in an S-shaped curve as a whole is arranged above the pair of rollers 14 and 16 in the illustrated example, and , Is rotatably supported by both frames 12 and fixed to a shaft member 42 extending in parallel with the pair of rollers 14 and 16. The rocking members 40 are rocked together with the shaft member 42 within the angle range indicated by the alternate long and short dash line by expanding and contracting the air cylinder 44. One end (front end) of the air cylinder 44 is pivotally attached to the one rocking member 40, and the other end (rear end) thereof is pivotally attached to the one frame 12 via the bracket 44. There is.

On the other hand, the empty cross rolls 26 are mounted on two pairs of pins 50, which are attached to the pair of arms 48 extending from the pair of frames 12 to the front thereof at both ends thereof and which face each other. The empty cross roll 26 supported by the two pairs of pins 50 is the full cross roll 2 of the cradle 22.
0, and a part of the end surface faces the upper end of each swinging member 40 as viewed in FIG. 1 showing the state before swinging. Each rear pin 50 penetrates an arc-shaped long hole 52 provided in the swing member 40, and relatively moves through the long hole 52 while the swing member 40 swings.

When the rocking member 40 is rocked, the full cross rolls 20 on the pair of rollers 14 and 16 project from the cloth 18 at both ends of the rocking member 40, and more specifically, the lower wall 56 described later. It receives a pressing force from the lower end of the roller and rolls toward the pedestal 22 along the locus shown by the alternate long and short dash line. During this time, the upper end of the lower wall 56, which defines the guide groove 54 provided on the swing member 40 and extends along the edge of the swing member, passes between the pins 50 and the empty cross roll 26 supported by the pins 50. Push diagonally upward. As a result, the empty cross roll 26 drops from both pins 50, and its end portion engages with the guide groove 54 of the swing member.

Until the full cross roll 20 is transferred to the cradle 22, a part of the guide groove 54 of the rocking member 40 faces a part of the end surface of the woven fabric 18 wound around the full cross roll 20. .. From this, the empty cross roll 26 dropped from the pin 50 follows the swinging motion of the swinging member 40, the middle portion of which is in contact with the peripheral surface of the woven fabric 18 of the full cross roll, and the end portion thereof is the guide groove 54. When the full cross roll 20 is transferred onto the pedestal 22, the facing of the guide groove 54 and a part of the end face of the woven fabric 18 is released,
As a result, the empty cross roll 2 is provided above the front roller 14.
The end of 6 is discharged from the lower end of the guide groove 54. In this way, the empty cross roll 26 is supplied onto both rollers 14 and 16. In the type in which the cross roll is directly rotated via the gear, the full rotation of the woven fabric 18 from the full cross roll 20 to the loom 1 is performed by rotating the drive gear in the reverse direction.
The tensile force may be applied toward 0. The cradle 22
Is not limited to one provided in the vicinity of each loom, but may be provided in a cross roll exchanging device that moves around a plurality of loom.

As shown in FIG. 2, by pressing a woven fabric 18 around a part of the loom, for example, another roller 38 located below the front roller 14 to the roller 38,
The tension of the woven fabric 18 can be maintained between the roller 38 and the full cross roll on the pedestal 22. Woven fabric 18
When the pressing force is applied to the full cross roll 20 in consideration of the increase in the length of the woven fabric as the weaving proceeds,
Immediately after it has been transferred to 2. Woven fabric for roller 38
A pressing member 58 extending in the longitudinal direction of the roller 38 is rockably supported on the lower portion of each frame 12 for pressing the roller 8. The pressing member 58 is swung by the expansion and contraction operation of the air cylinder 60 arranged in front of the pressing member 58 and extending in the front-rear direction, thereby pressing the woven fabric 18 against the peripheral surface of the roller 38 and releasing it. The air cylinder 60 is pivotally attached to the lower portion of the pressing member 58 and the pedestal 22 at both ends thereof.

If the pressing against the woven cloth 18 is performed while the tensile force is applied from the full cross roll 20 toward the loom 10, the tension of the woven cloth 18 can be increased. For this purpose, as shown in FIG. 3, a roller 38 around which the woven cloth 18 is wrapped is swingably supported by both frames (only one of them is shown) 12 via an arm member 62. The arm member 62 has a rear end portion which is connected to the frame 12
Is pivotally attached to. Further, the arm member 62 includes the roller 3
At the rear of its front end supporting 8 the spring member 64
Is connected to the frame 12 via a spring member 64 and receives a tensile force by the spring member 64. Arm member 6 that receives the tensile force
2 is prevented from swinging counterclockwise in FIG. 3 by a stopper 66 provided on the frame 12.

On the other hand, the pressing member 58 shown in FIG. 3 has a cylindrical surface made of a rubber material, and is fixed to one end of an L-shaped arm member 68 pivotally attached to the front ends of both frames 12. .. The other end of the arm member 68 is connected to the air cylinder 60. When the air cylinder 60 is extended, the pressing member 58 swings in the counterclockwise direction together with the arm member 68 and abuts against the roller 38 through the woven fabric 18, and the pressing force is applied clockwise to the spring force of the spring member 64. Swing against. As a result, the woven fabric 18 receives a tensile force from the full cross roll 20 toward the loom 10.

In the example shown in FIG. 4, another roller 36 is swingably supported by both frames 12 via a pair of arm members 70 spaced from each other. A receiving member 71 is arranged in parallel with the roller 36 and is fixed to a support member 72 installed on the loom. Arm member 70
Is pivotally attached to the frame 12 at the end opposite to the end supporting the roller 36, and is swung via the air cylinder 74. The air cylinder 74 is pivotally attached to a part between both ends of the arm member 70 and the frame 12. When the air cylinder 74 is extended, the roller 36 is pressed against the receiving member 71 through the woven fabric 18, and the roller 36 is also pressed.
The woven fabric 18 receives a tensile force during the rocking of the.

Referring to FIG. 5, two rollers 36,3
8, the pressing member 58 that can move up and down, and the pressing member 5
8 and a receiving member 71 facing each other. The pressing member 58 is fixed to a lower end portion of an air cylinder 76 having an upper end portion pivotally attached to each frame 12, and is fixed to both rollers 36,
It is located above the woven fabric 18 that goes around 38. Further, the receiving member 71 is fixed to both frames 12 at both ends thereof. According to this, the pressing member 58 descends due to the extension operation of the air cylinder 76, and presses a part of the woven fabric 18 against the receiving member 71. Thereby, the tension of the woven fabric 18 is maintained. In addition, the woven fabric 18 between the rollers 36 and 38
A bar member 78 is movably supported by the two frames 12 in the upper position. By pulling down the bar member 78 as shown by an imaginary line, a tensile force can be applied to the woven fabric 18.

The reference numerals 80 and 82 in the figure guide the end of the woven cloth 18 extending from the loom 10 between the rear roller 16 and the empty cloth roll 26 after cutting the woven cloth, and the empty cloth. Reference numeral 84 represents a nozzle for ejecting air for urging the end portion of the woven fabric 18 toward the peripheral surface of the roller 14, and reference numeral 84 represents a guide plate for the end portion of the woven fabric 18.

[Brief description of drawings]

FIG. 1 is a schematic longitudinal sectional view of a front portion of a loom. However, hatching to the roller and the shaft member is omitted in order to avoid making the drawing complicated.

FIG. 2 is a partial vertical cross-sectional view of a front portion of a loom provided with a pressing member.

FIG. 3 is a partial vertical cross-sectional view of a front portion of a loom provided with a pressing member of another example.

FIG. 4 is a partial vertical cross-sectional view of a front portion of a loom provided with a receiving member.

FIG. 5 is a partial vertical cross-sectional view of a front portion of a loom provided with a pressing member and a receiving member.

[Explanation of symbols]

 10 Loom 18 Woven fabric 20 Full cross roll 22 Cradle 24 Cutter 26 Empty cross roll 58 Pressing member 71 Receiving member

Claims (3)

[Claims] 1. A full cross roll, which extends from a loom being woven and is supplied to the loom and which is rotatably supported by the loom, contacts the loom and is placed on a pedestal near the loom. A method of maintaining tension of a wound woven fabric, comprising rotating the empty cross roll to exert a frictional force on the woven fabric from the full cross roll toward the loom, maintaining the tension of the woven fabric. Method. 2. A full cross roll, which extends from the loom being woven, is supplied to the loom, and is rotatably supported by the loom, is in contact with the weaving loom and is placed on a pedestal near the loom. A method of maintaining the tension of a wound woven fabric, comprising a part of the woven fabric on the side of the empty cross roll from a woven fabric cutting cutter provided between the empty cross roll and the full cross roll. How to maintain the tension of the woven fabric, which prevents the movement of the fabric. 3. The method according to claim 2, wherein movement of a part of the woven fabric is prevented while exerting a tensile force on the woven fabric from the full cross roll toward the loom.