JPS5940740B2 - Yarn supply device for loom - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a yarn supply device for textile machines such as looms and knitting machines, particularly preferably for knitting machines.

This device has a drum for yarn storage, around which the yarn emerging from the spool is wound, from the drum beyond the drawer rim of the drum and through the central drawer hole.
A thread is drawn through the material. The device further includes a movable thread guide member disposed adjacent to the thread withdrawal path near the drawer rim, the thread guide member being in a first position in which the thread is in an unwinding state. is in a state of non-contact with
In the second position, the yarn is in side contact with the yarn in the unwound state, and prevents the yarn from being deflected laterally in the rotational direction of the drum, so that when the yarn guide member is in the second position, the yarn is The speed at which the thread is drawn is limited to the speed at which the thread is wound around the drum. Yarn feeding devices such as those mentioned above are already known which can be selectively used to feed yarn either actively or intermittently.

However, in known yarn feeding devices of this kind, for example the yarn feeding device disclosed in Japanese Patent Publication No. 47-9865, the yarn guiding member is formed as a finger, that is, a simple rod member, and is fixed under the lower end of the drum. It is rotatably journaled around a pin that extends across the drum axis. In the position for active thread feeding, the finger projects partially beyond the drawer rim and is pivoted transversely to the drum axis. This version of the known thread feeding device functions satisfactorily. However, it requires a fixed shaft passing through the drum, and therefore involves some structural limitations. In addition, in the case of intermittent yarn feeding, the finger, which is in line with the drum axis, is difficult to reach as the yarn rotates around it. Therefore, switching to active yarn feeding during continuous operation is not very easy. In another known thread feeding device, the thread hole member acts as a thread guide member. The thread guide member is pivoted for this purpose on a rotary arm. This rotary arm is rotatably journalled on the frame of the thread feeding device outside the drum, on a shaft extending transversely to the drum axis (2), and the thread hole member (for intermittent thread feeding). It can be selectively provided in a position overlapping the drum axis or (for positive yarn feeding) in a position radially offset from the drum. This form also works satisfactorily, but
In the case of active yarn feeding, the withdrawal hole member is located next to the drum, which has the disadvantage of changing the path of the yarn. In order to prevent this, it is actually necessary to install a fixed auxiliary thread hole member. The object of the invention is to simplify the construction and operation of a yarn feeding device of the type described above.

To achieve this object, according to the invention, the drum for yarn storage is wound onto the drum by means of a stationary yarn winding means, in which the yarn passes around the drum, the winding means having a winding mechanism that is opposite to the direction of rotation of the drum. A hook with a directional opening is attached.

In its first position, the hook, which rotates around the drum together with the winding means, is kept out of contact with the thread being drawn off from the drum, so that intermittent thread feeding is possible.

In the second position, the thread is in contact with the thread being drawn off the drum and limits the drawing of the thread from the drum to the rotational speed of the winding means, thereby also limiting the speed of winding onto the drum. b, which means that active thread feeding is achieved. This switching between the first position and the second position is possible in the easiest and simplest way.
This is because it is sufficient to simply displace the hook. In its second position, the hook automatically captures the thread in its open mouth, allowing a positive thread changeover to the thread supply.
A fixed drum and a free drum R: have an annular winding means with a rotating winder in the diaphragm part and a thread hole for guiding the winding thread, into which the thread is being actively fed. Yarn feeding devices are already known which are further provided with thread hole means for guiding the drawn-off thread.

However, in this case, when switching from intermittent yarn feeding to active yarn feeding, it is necessary to pass the yarn through the pull-out hole of the winding means, which is cumbersome. Embodiments of the present invention will be described below based on the drawings.

In FIGS. 1 to 3, the drum 21 is attached to a housing 22 to prevent rotation.

The housing 22 is fastened to a support ring of a textile machine, such as a loom, knitting machine, etc., by means of a tightening device, indicated schematically at 24. A hollow shaft 23 passes through the thread winding drum 21 and the housing 22, and a pin wheel 25 is attached to the shaft.
is permanently installed. The pin wheel 25 operates together with a perforated drive belt (not shown) to rotate the shaft 23. At the lower free end of the hollow shaft 23 a disc 26 is supported, which has at its outer end a flange-shaped ring 27, which is connected to the lower free end of the drum 21. It wraps around the edges. The ring 27 is provided with a threading hole 28. The members 26-28 thus emerge from the feed system spool (not shown), pass through the hollow sea shaft 23, then turn radially outwardly (through the threading hole 28) and pass through the drum. 21 constitutes a thread winding member that is wound in contact with the thread. A ball bearing 29 is disposed diagonally on the hub 26a of the disk 26), and its rotation is caused by the displacement of the disk 3.
0 rotates. The displacement disk 30 has arms 31 extending outwardly through longitudinal slots 32 in the wall of the drum 21. Arm 31 is associated externally by a ring 33. Due to the inclined arrangement of the displacement disc 30 on the hub of the disc 26, during the rotation of the hollow shaft and the winding member fixed thereto, the displacement disc 30 undergoes a wobbling movement, which causes the winding on the drum 21 to The yarn is pushed up towards the ground in the direction of the drum axis and thus the intermediate feed system V
is formed on the drum.

The yarn is withdrawn from the drum 21 in a vertical direction from an intermediate feed system V, indicated as F' in the drawing.

The thread thus passes over the outer surface of the ring 27 and reaches the central outlet member 34. A hook 36 with an open mouth in a direction opposite to the direction of rotation of the thread winding member is pivotally supported at the lower part of the disc 26 and is rotatable about a vertical shaft 35.

When the hook is in the first position shown in FIG. 3, it is located within the periphery of the disk 26, and when in the second position shown in FIG. protrudes in the direction. In the position shown in FIG. 3, the hook 36
', so that the yarn can be unwound vertically from the drum 21 independently of the winding speed.

Intermittent yarn feeding is possible in this way. Hook 36
If F' is in the position shown in FIG. 2, the unwound thread F' cannot pass around the lower edge of the drum 21 as quickly as the ring 27.

The thread F'' is captured by the opening 36a of the hook 36 and therefore cannot overtake the hook 36.The rotational speed of the ring 27 and the threading hole 28 determines the winding speed of the thread.
The unwinding speed is limited to the winding speed. Therefore, positive thread feeding is achieved. According to the present invention, there is provided a yarn supplying device which has a very simple configuration and which allows switching operation between intermittent yarn supply and active yarn supply to be extremely easy and to operate reliably.

According to the present invention, the thread guide member is shaped like a hook that opens in the opposite direction to the rotational direction of the thread winding member, so that when the thread is actively fed, the thread is captured by the hook, and therefore the thread guide member The thread will not come off from the thread, and the thread will be fed reliably and actively.

Furthermore, according to the present invention, since the thread guide member is provided on the thread winding member, it can be made small, and therefore the space for movement of the thread guide member can also be small.

Therefore, the yarn supplying device itself can also be made smaller.

[Brief explanation of the drawing]

The drawings illustrate a preferred embodiment of the invention, FIG. 1 being a partially sectional side view of the embodiment, FIG. 2 being a bottom view of the apparatus of FIG. FIG. 3 is a diagram similarly showing an intermittent yarn supply state. Explanation of symbols of main parts: 21... Yarn storage rack, 26-28... Thread winding means, 36... Hook (thread guide member).

Claims (1)

[Scope of Claims] 1. A device capable of selectively supplying yarn actively or intermittently, comprising a fixed yarn storage member and a device on the yarn storage member. a thread winding member rotatable for winding the thread, and axially displacing the thread wound on the thread storage member to form a thread storage member on the thread storage member from which the thread is transferred to the thread storage member; A thread guide member is provided, which extends over the end of the storage member and is drawn out for thread consumption in a thread withdrawal passage diagonally in the direction of the axis of the wound thread. is movable into and out of the thread withdrawal passage near said end of the thread and is adapted to prevent the thread from being drawn out faster than it is wound by contacting the thread to be drawn only in the case of active thread feeding. In the yarn feeding device for a textile machine, the yarn guide member is shaped like a hook so as not to surround the yarn, and the mouth of the hook is arranged in a direction opposite to the rotational direction of the yarn winding member. the thread guiding member is open and the mouth of its hook rotates radially beyond the periphery of the thread winding member about an axis parallel to the axis of the thread storage member when the thread guiding member actively feeds the thread. 1. A yarn feeding device, characterized in that the yarn feeding device is provided on a yarn winding member so as to be able to do so. 2. In claim 1, the thread winding member is provided below the thread storage member at right angles to the axis of the thread storage member, and has a peripheral edge portion extending radially outward from the peripheral edge of the thread storage member. a flange-shaped ring integrally formed on the peripheral edge of the disk and having a thread passing hole for guiding the thread to be wound around the thread storage member; Yarn supply device pivoted on the bottom.