JPS5860042A - Apparatus for measuring length of weft yarn in 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 The present invention relates to a weft length measuring device for a loom.

Conventional 1 For example, in Jetrou, a weft of the length required for one weft insertion is placed in an air stream and stored in a storage pipe to produce rice, and then the weft is flown again into the warp opening by the air stream. A so-called pipe-type weft length measuring device that performs weft insertion by running the weft was generally used, but this type of weft length measuring device has a relatively high resistance when the weft inside the storage pipe is pulled out by the airflow during weft insertion. big on.

In addition, since the insertion of the weft thread into the storage pipe is also dependent on airflow, it is difficult to store the weft thread of the length required for one weft insertion accurately, resulting in unstable weft insertion operation and the occurrence of weft insertion errors. It had the disadvantage of being easy.

Therefore, in order to eliminate the fIrIr notation of the pipe-type weft length-measuring device, various drum-type length-measuring devices with a variety of structures that have less resistance when releasing the stored weft yarn during weft insertion have been proposed recently. The structure of this method is also very complicated, and there is a drawback that accurate length measurement cannot be performed. For example, JP-A-53
- The frame described in Japanese Patent Application No. 101.134, in which a winding arm disposed at one end of a winding drum whose rotation is prevented is rotated around the winding drum to wind the weft around the surface of the winding drum, and A plurality of bins are sequentially rotated in the axial and radial directions through the slots of the drum, and are brought into and out of the drum surface to measure and store the weft yarn necessary for seven weft insertions, and to wind up the stored weft yarn. This is a weft length measuring device that discharges from the other end of the drum. However, in this structure, since the pin needs to be pivoted, the bin drive is not only very complex but also has to be installed inside the drum.

In addition, the winding arm rotates at one end of the drum, and the ballooning of the weft yarn discharged from the drum occurs at the other end, so the entire area around the drum is surrounded by rotating objects.
In order to keep the drum stationary, it is necessary to provide a complicated device such as a structural fixing mechanism from the outside to keep the drum stationary. Therefore, it is difficult to keep the drum completely still, and vibrations are likely to occur in the drum, making it impossible to measure the length accurately.

Also, % Kaishoj! The device described in the -240''' Jt publication has a structure in which the drum itself is rotated and the weft is wound around its surface, but the weft length measuring device that appears on the circumferential surface and the driving device for the storage layer pin are installed inside the drum. Since the pins must be inserted and removed while the entire unit is rotating, it is not only difficult to set the timing for inserting and removing the bottles, but the structure must also be extremely complex. It's difficult.

Therefore, an object of the present invention is to provide a weft length measuring device which has a very simple structure yet can perform accurate length measurements in order to eliminate the drawbacks of the conventional drum-type weft sub-lengthening device. DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described with reference to the accompanying drawings.

In Figure 1, / is a frame located on the side of the machine, 2
is a rotary support shaft which is rotatably supported by VC in the weft insertion direction (right side in Fig. 1) with respect to the same frame via a bearing J, and a pulley is fitted and fixed at the rear end with a key. It is actively rotated by a tine belt j that rotates in synchronization with the weaving operation. A passage 2a is formed in the center of the rotation support shaft to receive the weft 19 from the weft supply bobbin 6, and this passage 2a communicates with a yarn guide pipe inserted and fixed obliquely into the rotation support shaft. ing. t is an annular weft winding guide attached to a support arm fixed to the tip of the yarn guide tube 7, and when the support shaft is rotated, it moves around the weft winding part, which will be described later. It rotates and winds the weft/l around the weft winding support surface. The said parts,
, j and de constitute a weft winding means 30. 1011
It is a funnel-shaped protector that protects the ballooning weft/9.

//C is a weft winding part disposed on the weft insertion direction side facing the protector 10, and its fixing plate /J is a bolt /JK
It is structurally held stationary by being fixed to the paper frame.

In FIGS. 1 and 2, the weft winding portion // is supported in a cantilever shape on the fixed plate l side in order to form a smooth weft winding support surface around it. Fixed wire of almost L-shaped Yumoto / lIa, n'4I
b and seven movable wires/1. Fixed wire 741a.

The proximal end of 1llb is fixed to the fixed plate/co by a screw member with 7 flange and bolt 14, and the movable wire l! The proximal end of is attached to an elastic plate in an appropriate manner.

Elastic plate l? is a long and narrow strip-shaped curved plate, both ends of which are wrapped around the fixing bolt et.
It is supported by the fixed plate 12 via. Therefore, by loosening the fixing bolt /l and adjusting the amount of winding at both ends of the elastic plate (for example, as shown by the imaginary line in Figure 1), the position of the movable wire /j,
That is, the length measurement amount can be adjusted by aMl.

In this weft winding part 11, weft yarns released from a weft winding support surface formed by movable and fixed wires are guided to an external weft insertion means (not shown) or to the weft insertion direction as described later. A weft guide part 0 is supported and disposed on a frame 1. The guide part Q has a thread passage 20 and a weft entrance where the eel body 10 side opens in a morning glory shape.
has.

In addition, on the outside of the weft winding part //, for example, a support shaft attached to a bracket (indicated by a phantom line in Fig. 1) supports a number of arms here and here. One end of 3 enters the weft winding part 1/ through a window/C& drilled in the fixing plate/C, and curves upward to fix the length measurement control bin 21L and the rewinding control bin 3&. Facing the space between wires /#lL and /+t1, arm 2.
2. The drive device to which the other end of Ko J is related Ko4! - (In the figure, it is a cam mechanism including camco lIa and co+'b, but a solenoid may be used.) In synchronization with the fine weaving operation, these bins JJIL and co3a are slightly inclined weft winding. The weft winding support surface can alternately appear and retract from the weft winding support surface at forward and backward positions along the support surface. Note that the length measurement control bin a is used to measure the length of the weft necessary for one insertion.5 The rewind control bin 3a starts inserting the weft it wound into the weft winding section //. However, since the structure of the bottle itself and the timing of appearance and retrieval thereof are not the gist of the present invention, a detailed explanation thereof will be omitted. For these bottles, it is important to control the ejection and retraction by means of a simple external drive. Further, the bottles 12&, 3a are not limited to those that appear and disappear at fixed positions as in the embodiment, but are not limited to those that appear and disappear at fixed positions as in the embodiment, for example,
It is also possible to adopt a type such as No. 04IJ4 in which a plurality of bottles are made to appear and disappear while rotating in the axial direction.

Also, in order to prevent the weft yarn transferred from the weft winding guide l to the weft winding part // from being caught between the wires, a guide plate is installed between the fixed guides / *, llI &. An open loco 5a is fixed to the hole as shown in FIG.
If the structure is configured so that ``('' appears and disappears), the holder/lIb near the bottle 22a and the holder 3a may be replaced with a part of the drum.

Fig. D shows all the improved examples of the weft guide section Ko0 according to the present invention, in which the injection nozzle rollers are provided at appropriate positions so as to surround the weft guide section Ko0, and the injection nozzle rollers are provided in the weft guide section -〇. Air is injected from the injection ports 27 at appropriate timing to allow the weft to advance smoothly.

Next, the operation of the weft length measuring device according to the present invention will be explained.

In FIG. 7, the rotation support shaft is driven in synchronization with the weaving operation, so that the weft/? is wound on the wire and guide plate of the weft winding section via the yarn guide tube 7 and the weft winding guide t. At this time, the length measurement control bin a is the opening loco jlL of the guide plate Jj (Fig. 3)
The weft l protrudes from the weft and has the length necessary for one weft insertion.
? Measure the length at the appropriate timing 7 2/ 3 & 8. f1 The applied weft yarn is attached to a smooth weft winding support surface formed by the fixed wire 111, the guide plate 1, and the movable wire 15 so as to be slightly inclined downward toward the weft entrance side of the yarn path Oa. 1 by sliding
It is locked to the rewind control bin jlL. On the other hand, the sub-length control bin Coco LL protrudes again to measure the length, and at the start of weft insertion, the rewinding control bin JJ& exits and the weft I which had been stored until then is removed. As a result, the weft yarn /1 passes through the weft guide part 0 in the weft insertion direction and is inserted into the warp opening 19 by the weft insertion means. At this time, the weft it causes ballooning as shown in FIG.
Pass it through the weft guide part Qt-weft winding part ll, and
Since the wire is guided from the yarn guide tube 7 side to the weft insertion means side, the ballooning is performed at the yarn guide tube 7 side.

Therefore, since the weft winding part // on the weft insertion means side is not surrounded by any rotating object, the weft winding part /l can be removed from the weft insertion means side by a very simple means such as a bolt lJ. It is possible to fix it immovably, and also,
A very simple structure can be used as the drive device for the length measurement and rewinding control pins a and JIL, and this drive device can also be installed outside the weft winding section ii.

Therefore, according to the present invention, there is provided a weft sub-length device which has a very simple structure and is capable of accurately measuring length while dipping.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the weft sub-length device according to the present invention, FIG. 1 is a side view of the weft winding section shown in FIG.
The figure is a partially enlarged view illustrating the installation state of the guide plate, and FIG. 9 is a cross-sectional view showing an improved example of the weft guide section according to the present invention. In the figure, 4 is the weft supply bobbin, // is the weft winding section, /f is the weft, -0 is the weft guide section, here a is the length measurement control bin, J
JIL is a rewinding control bin, 4I is a drive device, and JO is a weft winding means.

Claims (1)

[Claims] a hollow fixed weft winding part that forms a weft winding support surface around the support surface; a weft winding means that rotates around the support surface to wind the weft from the weft supply bobbin around the support surface; a weft guide section disposed within the weft winding section and guiding the weft wound around the supporting surface of the weft winding section to an external weft insertion means through the inside of the weft winding section; and a weft guide section having a length necessary for seven times of weft insertion. a length measurement control bottle that retracts from the inside of the weft winding section onto the support surface in order to measure the length of the weft yarn; Rewinding control bins that appear on and retract from the support surface from six inner parts of the weft winding part, and the rewinding and length measurement control bins that are arranged back and forth along the axial direction of the weft winding part are alternately arranged. and a drive device connected to the unwinding and sub-length control bins for moving the weft yarn into and out of the support surface.