JPS6134261A - Weft yarn storage apparatus of shuttleless loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a rotating drum type weft storage device for a zero-thread loom, and particularly to improvements in the weft locking and unwinding portions.

Prior Art In this type of rotating drum type weft yarn storage device, it is necessary to lock the weft yarn when it is wound on the drum, and the locked weft yarn must be unwound when wefting the weft yarn. For example, the invention disclosed in Japanese Patent Application Laid-open No. 142859/1985 provides a gripping disk that is movable in the axial direction in the internal space of the length-measuring drum, and by making the teeth of this gripping disk protrude from the end surface of the length-measuring drum, the weft is fixed on the drum. In this gripping type storage device, when unwinding the weft yarn, the weft yarn is passively waited for to come off the teeth of the gripping disk, so the unwinding of the weft yarn is unstable, and the weft insertion time is 1° unwinding. The situation is subject to change.

Purpose of the Invention Therefore, the purpose of the present invention is to stabilize the weft insertion by actively removing the weft thread not only when the weft thread is locked but also during unwinding and by always keeping the unwinding point constant. It is to become

SUMMARY OF THE INVENTION Therefore, the present invention provides a method for disposing a disk rotating at the same average speed as the drum on the front surface of a length measuring/storage drum, and forming notches on the outer periphery of the drum and the disk. By aligning the notches when the weft is locked, the weft is locked at that part, and when the weft is unwound, by shifting the phase of the disk relative to the drum during rotation,
There is no apparent upper notch on their outer periphery, so that the weft yarn in a locked state can be actively unwound.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings.

1 and 2 show a rotating drum type weft yarn storage device 1 of the present invention. As seen in FIG. 1, this weft yarn storage device 1 includes, as main parts, a drum 2 for length measurement and storage, and a disc 3 for controlling the locking and unwinding of the weft yarn 4. . This drum 2 has a plurality of notches 2a formed along the outer periphery of the unwinding side of the outer circumferential winding portion 2b in order to lock the weft yarn 4, and the disc 3 has Almost U-shaped notches 3a and slopes 3b formed diagonally at the same intervals as the notches 2a.
is formed. The drum 2 is fixed to the end face of a hollow drum shaft 5, and the disc 3 is fixed by a disc shaft 6 inside the drum shaft 5. In this way, the disc 3 is located close to the unwinding side end face of the dome 2 and on the same axis.

The drum shaft 5 is rotatably supported by a bearing 8 provided inside the housing 7, and is engaged with a gear 9 fixed to an input shaft 11 by a gear 10 formed at its rear end. .

The input shaft 11 is rotatably supported by a bearing 12 on the housing 7, and is engaged by a fixed gear 13 with a gear 15 rotatably supported on the disk shaft 6 by a bearing 14.゛Also, the disk shaft 6 is
It is rotatably supported inside the drum shaft 5 by a sliding bearing 16, and is also supported by the housing 7 by a bearing 17 at its rear end.

The above-mentioned gear 15 meshes with a gear 18 located away from the center line of the drum shaft 5 and disc shaft 6, and a gear 19 integral with this gear 19 meshes with a gear 20 fixed to the disc shaft 6. There is. On the other hand, the gears 18 and 19 are rotatably supported by a bearing 23 on a shaft 21 fixed to an arm 22. Further, the arm 22 is rotatably supported at the post 24 of the housing 7 on the same axis of the driver shaft 5 and the disc shaft 6. And these gears 15.18.19.20 are gear 18.19
is used as a planetary gear to form a planetary gear mechanism. Therefore, in addition to the rotation of the input shaft 11, the disc shaft 6 also rotates the arm 22.
, that is, the rotation of the gears 18 and 19.

This arm 22 is in a driven relationship, as seen in FIG. 2, by a drive shaft 25 that is synchronized with the rotation of the loom. That is, a cam 26 mounted on the drive shaft 25 has contours 16a, 16b, 16c, 16d and is in contact with a cam roller 27 mounted on one end of the lever 28. This lever 28 is rotatably supported by a support shaft 29 at a fixed position, is biased counterclockwise by a pull spring 30 at one end, and connected to a connecting pin 3 at the other end.
1 and a connecting link 32 to one end of the arm 22 .

° The weft thread 4 is wound around the outer circumference of the roller 33 several times, and then passed through the thread guide 34 and wound around the outer circumference of the drum 2. Note that the roller 33 is in contact with the outer periphery of the large outer diameter portion of the drum 2 at a portion of the friction roller 35 that is integrated therewith. Further, the weft thread 4 passes through a thread guide 36 and a weft thread gripper 37, and is guided to a weft insertion nozzle 38. Note that an annular balloon breaker 39 is fixed to the outer peripheral portions of the drum 2 and the disc 3, and the thread guide 34 is attached to that portion.

Effect of the embodiment Next, the operation of the weft yarn storage device 1 will be explained.

When the numbers of teeth of the gears 9, 10, 13, 15, 18, 19 and 20 are respectively A, B, C, DSE, F, and G, the following relationship is satisfied between them. .

A/B= (C-F)/(E-G) Now, input shaft 1
1 is transmitted to the drum 2 via the gear 9.10 and the drum shaft 5, and the rotation of the gear 13.15.18.19.2
0 and is also transmitted to the disk 3 via the disk shaft 6.

Here, during the period in which the cam roller 27 is in contact with the low profile 26a of the cam 26, the arm 221 does not rotate about the axis of the disk shaft 6. Therefore, the disk 3 rotates at the same rotational speed as the drum 2. And, for drum 2, the third
It rotates in a relative positional relationship as shown in the figure.

At this time, since the notches 2a and 3a lock the weft thread 4, the weft thread 4 is wound around the outer peripheral surface of the drum 2 and stored while being locked.

Eventually, as the cam 26 rotates and the cam roller 27 contacts its contour 26b, the arm 22 rotates clockwise in FIG. direction, i.e. drum 2
An orbital motion opposite to the direction of rotation is given. As a result, the disk shaft 6 rotates at a lower rotational speed than the drum 2 under the influence of the revolution movement of its gears 18,19.

When the arm 22 swings by an angle θ, the phase angle β of the relative shift between the drum 2 and the disk 3 is expressed by the following equation.

β-θ・(E-G-D-F)/(E-G) As a result, the notch 2a of the drum 2 is closed by the notch 3a of the disc 3, and the apparent outer periphery of the upper drum 2 is This is the same state as if the notch 2a did not exist on the surface. For this reason, the notch 2a,
The weft thread 4, which was held in the notches 2a and 3a, moves along the slope 3b, as shown in FIG.
It comes off from a, becomes unrolled, and is set to a state where it can be placed horizontally. In this unraveling state, the weft thread gripper 37 is opened, the weft thread 4 is released, and the weft thread nozzle 38 is opened.
The weft is inserted into the opening of the warp threads. When a certain length of the weft thread 4 has been inserted, the weft thread gripper 37 is closed and the weft thread insertion is completed.

Such an operation is performed once during one rotation of the loom.

The cam roller 27 passes the contour 26b of the cam 26 and reaches the contour 2.
6c, the arm 22 stops again, so the disc 3 continues to rotate at the same speed as the drum 2 while being displaced.

Next, when the cam roller 27 approaches the contour 26d, the disc 3 temporarily rotates at a faster speed than the drum 2, contrary to the above, so the relative positional relationship between the drum 2 and the disc 3 is Returning to the state shown in Figure 3, the weft thread 4 is locked again and wound around the outer circumference and surface of the drum 2. During this time, the average speed of the disk 3 is equal to the speed of the drum 2. .

In this way, the weft yarn storage device 1 repeats the length measurement and storage operation of the weft yarn 4 in synchronization with the rotation of ms.

Modifications of the Invention The above embodiment uses a cam mechanism as a means for imparting oscillating motion to the gears 18 and 19 as planetary gears, but this cam mechanism may be replaced with a lever crank mechanism having a similar function. You can also do that.

Effects of the Invention In the present invention, the weft thread is positively locked by the notches in the drum and the disc, and the weft thread is unwound by the relative rotational movement between the drum and the disc without any notches. In other words, unwinding is carried out actively with almost no resistance, so the unwinding timing of the weft is stable, and the unwinding resistance during unwinding is low, so the length measuring operation is suitable for high-speed rotating looms. It can be used all over the place.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the weft yarn storage device of the present invention, Fig. 2 is a rear view showing the meshing relationship of the gears, and Figs. 3 and 4 show the relative positional relationship between the drum and the disk. It is a front view of a part. 1. Rotating drum type weft storage device, 2. Drum,
2a, 3a...notch, 3...disc, 4...weft, 5
・・Drum shaft, 6・・Disc shaft, 9, Machining 0.13.11-
18.19.20...Gear, 11...Input shaft, 22...
Arm, 26...cam, 27...cam roller.

Claims (2)

[Claims] (1) Length measuring machine that rotates in synchronization with the loom and has multiple notches for weft thread locking on the weft winding part and the unwinding side end surface.
A storage drum, a disc that is provided close to the weft yarn unwinding side end surface of the drum, has a plurality of notches on its outer periphery corresponding to the above-mentioned notches, and rotates at the same average speed as the drum; 1. A weft storage device for a threadless loom, comprising a drive mechanism that provides a disk with a relative rotational motion in the same and opposite directions as the rotational direction of the drum. (2) Claim 1, characterized in that the drive mechanism is constituted by a planetary gear mechanism and a mechanism that gives the planetary gear a swinging motion about the central axis of the disk.
A weft storage device for a non-thin loom as described in 2.