JPH05321088A - Method and apparatus for tightly winding in initial period of winding woven fabric - Google Patents

Abstract

PURPOSE:To avoid the deterioration in quality by the occurrence of winding wrinkles by removing the slackness of a woven fabric in the initial winding unique to a contact winding method. CONSTITUTION:In a contact winding method for placing an empty roll (A) on a pair of rotating rollers 1 and 2 in which at least either is the driving side, rotating the empty roll and wrapping the fabric end, a relative motion driving mechanism 20 is installed and the empty roll (A) and the woven fabric (C) are subjected to relative motion so as to separate the peripheral surface of the empty roll (A) from the woven fabric on the outermost layer in the wrapping direction after winding the empty roll (A) with one or more turns of the woven fabric (C).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a contact winding system for winding a cloth edge by placing an empty roll on a pair of rotating rollers, at least one of which is a driving side, and rotating the empty roll. ..

[0002]

2. Description of the Related Art A cloth winding device for a loom disclosed in Japanese Patent Laid-Open No. 3-69640 is known as a device that employs the above contact winding system. In the device of this prior application, when a predetermined amount of woven cloth is wound, a fully wound cross roll is transferred to a stand provided in front of the loom,
After that, the woven cloth that continues to the front of the cloth is nipped between the empty roll and the take-up side rotating roller, and the empty roll is transferred onto the pair of rotating rollers. Further, the cloth end separated from the full roll (full roll by the cutter) is wound around the empty roll, and the woven fabric is wound around the empty roll by air injection from the air injection nozzle.

[0003]

However, when the initial winding as in this prior application is performed, the initial winding is inevitably in a loose state. As a result, the woven fabric to be wound thereafter has winding wrinkles, which significantly impairs the quality of the woven fabric.

An object of the present invention is to eliminate the looseness of the woven cloth at the initial stage of winding, which is peculiar to the contact winding method, and to avoid the deterioration of quality due to the occurrence of wrinkles.

[0005]

[Means for Solving the Problems] A relative motion drive mechanism is provided, and after the woven fabric is wound around an empty roll one or more times, the empty roll side at the contact portion between the peripheral surface of the empty roll and the outermost woven fabric. The empty roll and the outermost woven fabric are moved relative to each other so that the contact of each of them moves away from the corresponding contact of the woven fabric in the winding direction.

[0006]

In the winding direction of the empty roll and the outermost layer of the woven cloth, the contact point of the empty roll side at the contact portion between the peripheral surface of the empty roll and the outermost layer of the woven cloth corresponds to the contact point of the corresponding woven cloth side. By relatively moving the empty roll and the outermost woven fabric so as to move away from each other, the length of the woven fabric substantially wound around the empty roll is shortened. As a result, the gap between the woven fabric and the empty roll is eliminated, and the wound state is achieved.

[0007]

1 and 2 show one embodiment of the apparatus of the present invention, in which a supporting member of a relative motion drive mechanism lifts an empty roll to separate it from a pair of rotating rollers 1 and 2. It is the one. Both ends of the pair of rotating rollers 1 and 2 are rotatably supported by the loom frame 30. The pair of rotating rollers 1 and 2 includes a sending-side rotating roller 1 located at the rear and a winding-side rotating roller 2 located at the front. The delivery side rotary roller 1 is rotationally driven at a constant speed by a motor (not shown),
The take-up side rotation roller 2 is driven to rotate via a cross roll. The pair of left and right crank-shaped levers 21 whose shoulders are supported by appropriate portions on the outer side of the loom frame 30 have support members 22 facing the lower peripheral surface of the empty roll A at their upper ends. These levers 21 are operatively connected to each other so as to swing back and forth in synchronization with each other.
The lower end of 1 is connected to the cylinder rod of the fluid pressure cylinder 23.

When not in operation, the cylinder rod is retracted, and the support member 22 is kept at a standby position separated from the lower peripheral surface of the empty roll A. When a predetermined amount of the woven cloth is wound around the empty roll, a full roll (not shown) is transferred to a stand (not shown) provided in front of the winding side rotation roller 2 by a known all-extruding device (not shown). The empty roll A is newly placed on the pair of rotating rollers 1 and 2. As a result, the woven cloth which is continuous from the cloth fell to the full roll passes through between the empty roll A and the winding side rotation roller 2.
The woven cloth is cut between the full roll and the take-up side rotation roller 2, and the cloth end is guided to the empty roll A by a known air jet nozzle (not shown). Since the weaving of the loom and the rotation of the delivery side rotation roller 1 continue during this period, the cloth edge moves along the peripheral surface of the empty roll A, and the contact point between the empty roll A and the delivery side rotation roller 1 is reached. Pass through. Further, a cloth end is guided to a contact point between the empty roll A and the take-up side rotating roller 2 by a known air injection nozzle (not shown) provided below the empty roll A, and the woven cloth C is wound around the empty roll A one turn. Be done. In this way, when the woven cloth C is wound around the empty roll A and at least one winding is performed, the cylinder 23 is started by, for example, a timer as shown in FIG. 1, and the lever 21 swings clockwise in the drawing. And support member 22
Moves upward and pushes up the empty roll A. In other words, the empty roll A is moved in the direction orthogonal to the axis of the empty roll A. At this time, the support member 22 directly contacts the empty roll A without supporting the woven cloth C and supports the empty roll A. It is desirable that the support surface of the support member 22 be formed of a material having a large frictional resistance, such as rubber, so that when the empty roll A is lifted, the empty roll A is pulled by the woven fabric and does not rotate. The amount of upward movement of the empty roll A may be about 1 cm. Further, since the moving speed is higher than the weaving speed of the woven cloth C, the peripheral surface of the empty roll A moves away from the outermost woven cloth in the winding direction. More specifically, the contact point on the empty roll A side at the contact portion between the peripheral surface of the empty roll A and the outermost woven fabric moves away from the corresponding contact point on the woven fabric side in the winding direction. Of course, if two or more rolls of woven cloth are wound around the peripheral surface of the empty roll A, the contact between the peripheral surface of the empty roll A and the outermost woven cloth does not come into contact with the lower woven cloth. means.

As a modification of this embodiment, before moving the empty roll A upward, by gripping and fixing the woven fabric C on the upstream side of the empty roll A by an appropriate member (not shown),
For example, a pressing member is provided so as to be able to move forward and backward with respect to the woven cloth winding surface of the guide roller 7, and the pressing member is advanced to hold and fix the woven cloth C between the guide roller 7 and the pressing member. It is more effective if the increase in the length of the woven cloth is not transmitted to the empty roll A. Further, instead of lifting the lower peripheral surface of the empty roll A by the support member 22 as shown in the drawing, similar members may be engaged with both ends of the empty roll A and lifted while being clamped.

FIGS. 3 and 4 show another embodiment of the apparatus of the present invention, in which the roller of the relative motion drive mechanism is brought into contact with an empty roll and rotated in the winding direction. In this case, a pair of left and right L-shaped levers 21 that are synchronously oscillated (one of which is operatively connected to a fluid pressure cylinder 23 as in the case of the previous embodiment) is used, and the upper end of each lever 21 is used. A rotary drive roller 24 is provided in the roller, and is in contact with and engaged with the peripheral surfaces of both ends of the empty roll A. More specifically, a shaft member is rotatably supported between the pair of levers 21. The rotary drive rollers 24 having a diameter larger than that of the shaft member are integrally formed at appropriate portions of the shaft member corresponding to both ends of the shaft member, in other words, both ends of the empty roll A on which the woven cloth C is not wound. Has been formed. 1
When the pair of levers 21 swings upward, the rotation driving roller 24 directly contacts the lower surface of the empty roll A as shown in FIG. 3, and moves upward while contacting the empty roll A with the winding side rotation roller 2. To move. As shown in FIG. 4, a motor 25 is built in at least one lever 21, and after moving the empty roll A upward, it drives a rotary drive roller 24 provided at both ends via a bevel gear and a shaft member. It is like this. The rotation speed of the rotation drive roller 24 is set so that the rotation peripheral speed of the empty roll A driven thereby is higher than the weaving speed.
Further, it is desirable that the rotating roller 24 is formed of a material having a large friction coefficient such as rubber.

Further, as a modification, if the woven fabric is gripped and fixed on the upstream side of the empty roll A so that the increase in the woven fabric length due to the weaving is not transmitted, the rotational peripheral speed of the empty roll is increased. It is sufficient if is greater than zero.

In the example of FIG. 3, the empty roll A is rotationally driven by the circumferential contact between the rotary drive roller 24, which is a rotating member, and the empty roll A. However, instead of this, as shown in FIG.
A rotary body 26 is attached to the tip of each lever 21 as a rotary member so that each rotary body 26 can be moved in the axial direction with respect to the lever 21 by driving an actuator 28, and at least one rotary body 26 is driven by a motor 27. Rotate it. In this case, when the lever 21 swings upward, the rotating body 26 is set to be coaxial with the empty roll A. Further, the rotation speed of the rotating body 26 is set so that the rotation peripheral speed of the empty roll A rotationally driven thereby becomes higher than the weaving speed. During operation, the actuator 28 acts to move the two rotating bodies 26 to the empty roll A.
, The empty roll A is rotationally driven in the winding direction by the motor 27 via the one rotating body 26 in this state.

FIG. 6 shows still another embodiment of the apparatus of the present invention, in which the woven fabric is unwound on the upstream side of the contact point between the empty roll and the take-up side rotating roller by the pulling means of the relative motion drive mechanism. It is designed to be pulled in the winding direction. That is, both ends of the front guide roller 7 are supported by the rods of the fluid pressure cylinder 23. The fluid pressure cylinder 23 is fixed inside a loom frame (not shown). A receiving body 29 is provided near the guide roller 7 so as to face the woven fabric winding surface of the guide roller 7. The receiving body 29 is supported via a compression spring.
When the cylinder rod is retracted, the guide roller 7 is held at a normal position, that is, a standby position separated from the receiving body 29. At the time of operation, the cylinder rod advances and pushes the guide roller 7 downward so that the guide roller 7 is brought into contact with the receiving body 29 via the woven cloth C and further moved downward against the spring force. As a result, the woven cloth C is pulled in the direction opposite to the moving direction of the woven cloth due to the winding on the upstream side of the contact point between the empty roll A and the winding side rotation roller 2, and the looseness of the woven cloth is removed.

[0014]

Since the initial winding on the empty roll can be performed in a tight state, the deterioration of the quality of the woven fabric due to the occurrence of winding wrinkles can be effectively avoided.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the device of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a side view showing another embodiment of the device of the present invention.

FIG. 4 is an enlarged side view showing the main part thereof.

5 is a front sectional view showing a modification of the embodiment of FIG.

FIG. 6 is a side view showing still another embodiment of the device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sending side rotating roller 2 Winding side rotating roller 20 Relative motion drive mechanism 22 Support member 23 Fluid pressure cylinder 24 Roller 25 Motor 26 Rotating body 29 Receiving body

Claims (5)

[Claims] 1. In a contact winding system in which a cloth end is wound by placing an empty roll on a pair of rotating rollers, at least one of which is a driving side, and rotating the empty roll, the woven fabric is wound one or more times on the empty roll. After being wound, the contact point on the empty roll side in the contact portion between the peripheral surface of the empty roll and the woven fabric of the outermost layer moves so as to move away from the corresponding contact point on the woven fabric side in the winding direction. A tightening method at the initial stage of winding a woven fabric, characterized in that the woven fabric of the outermost layer is relatively moved. 2. A contact winding system for winding a cloth end by placing an empty roll on a pair of rotating rollers, at least one of which is a driving side, and rotating the empty roll. A drive mechanism for relatively moving the empty roll and the outermost woven fabric so that the contact on the empty roll side in the contact portion with the outer woven fabric moves away from the corresponding contact on the woven fabric side in the winding direction. A wrapping device at the initial stage of winding a woven fabric, characterized in that 3. The apparatus according to claim 2, wherein the relative motion drive mechanism includes a support member for lifting the empty roll. 4. The apparatus according to claim 2, wherein the relative motion drive mechanism has a rotating member which comes into contact with the empty roll and rotates in the winding direction. 5. The relative motion drive mechanism has means for pulling the woven fabric in the anti-winding direction upstream of the contact point between the empty roll and the winding side rotation roller. apparatus.